5A.-ENGINEER'S REPORT (full text)

Engineer’s Report December 2025 TABLE OF CONTENTS I. INTRODUCTION .............................................................................PAGE 3 II. DISCUSSION ....................................................................................PAGE 4 A. SANITARY SEWERS...........................................................PAGE 4 B. WATER ................................................................................PAGE 4 C. STORMWATER MANAGEMENT .....................................PAGE 5 APPENDICES A. STORMWATER CALCULATIONS AND MODELS  PRE-DEVELOPED DRAINAGE AREAS  PRE-DEVELOPED HYDROCAD MODEL RESULTS  POST-DEVELOPED DRAINAGE AREAS  POST-DEVELOPED HYDROCAD MODEL RESULTS  DRAINAGE INLET DRAINAGE AREAS  STORM SEWER SIZING SPREADSHEET (DRAINAGE COMPUTATIONS) B. WATERLINE CALCULATIONS AND MODELS  HYDRANT FLOW TEST  WATERCAD MODEL  PEAK INSTANTANEOUS WATER DEMAND CALCULATION EXHIBITS: 1. Project Site Location Map 2. NYSDEC Environmental Resource Mapper 3. FEMA Firmette 4. Site Soil Map 5. Cultural Resource Information System (CRIS) Map Greenman-Pedersen, Inc. GPI No. WNY-2500056.00 Page 2

Engineer’s Report December 2025 I. Introduction The proposed development of 359 Quaker Road (SBL: 175.06-3-9) is located in the Town of Aurora, Erie County, New York in Lot 39, Township 9, Range 6 of the Holland Land Survey. The 0.70± acre parcel is bounded on the north by the Quaker Road Right- Of-Way (ROW) (US 20A), on the east by 270 Quaker Road now or formerly owned by API Delevan, Inc. (SBL: 175.06-3-10), and on the south and west by 400 Quaker Road now or formally owned by 3095 Southwestern Boulevard, Inc. (SBL: 175.06-3-8). The proposed medical offices (dental) development consists of removing the existing building and parking area and installing a new 5,453± ft² one-story building and a new parking area consisting of 27 new parking spaces (including 2 van accessible handicap spaces). The project is anticipated for a construction start in the spring of 2026. Sanitary sewage service will be provided by a new six-inch polyvinyl chloride (PVC) sewer lateral. The sanitary sewer flows from the site will be tributary to the Erie County Sewer District (ECSD) #8 East Aurora Water Resource Recovery Facility (WRRF) located on Mill Road roughly 1,200-feet to the east of the project site. Water service for domestic use will be provided by a new two-inch type ‘K’ copper service connecting to the existing Erie County Water Authority (ECWA) twenty-inch prestressed concrete cylinder pipe (PCCP) watermain along Quaker Road (US 20A). Fire protection for the site will be provided by the existing fire hydrant located in front of 270 Quaker Road. Storm drainage for the proposed parking area will be diverted into a new stormwater conveyance system located within the proposed parking area and will outlet into the New York State Department of Transportation’s (NYSDOT) existing storm sewer system within the Quaker Road ROW (US 20A) along the northern side of the property. All proposed stormwater facilities have been sized to accommodate the flow of the stormwater runoff from the design storm events. The main text of this report summarizes the development of design. Detailed calculations and supplemental information, forms, etc. are located in the appendices. Greenman-Pedersen, Inc. GPI No. WNY-2500056.00 Page 3

Engineer’s Report December 2025 II Discussion A. Sanitary Sewers 1. System Description and Design Flows The proposed building will be serviced by a six-inch PVC sewer lateral installed south of the Quaker Road ROW (US 20A) crossing through the property to the east within a twenty-foot private utility easement then crosses under Quaker Road (US 20A) to the existing sanitary manhole within the westbound lane. The existing sanitary manhole is owned and operated by the Village of East Aurora and is tributary to the East Aurora Water Resource Recovery Facility (WRRF) within ECSD #8. The East Aurora WRRF is roughly 1,200-feet east of the proposed site along Mill Street. The estimated maximum flow rate for the proposed building is based on 250 gallons per day (gpd) per dental chair as per the New York State Design Standards for Intermediate Sized Wastewater Treatment Systems dated March 5th, 2014. The proposed building will have 7 dental chairs making the estimated maximum flow rate 1,750 gpd (7 dental chairs x 250 gpd per dental chair) or 0.00175 million gallons per day (mgd). With the peak design flow being less than 2,500 gpd, a downstream sanitary sewer capacity analysis is not required. B. Water 1. Domestic System Description and Design Flows Water service for domestic use will be provided by a new two-inch type ‘K’ copper waterline connecting to the ECWA existing twenty-inch prestressed concrete cylinder pipe (PCCP) watermain along Quaker Road (US 20A) and running to a new curb valve and box at the northerly property. From the curb box, the two-inch water service transitions to polyethylene tubing (DR-9) then runs to the proposed building’s mechanical room located in the southeast corner of the proposed building. The two-inch domestic water service to the building is sized to accommodate a peak instantaneous water demand of 42 gpm based on the various types and quantities of plumbing fixtures proposed for the Dental Office (See Appendix B). To protect the public water supply from any potential cross contamination from the private water service, a backflow prevention device (RPZ) and water meter assembly will be installed inside the building. The RPZ and meter assembly will be designed by others. 2. Fire System Description and Design Flows Greenman-Pedersen, Inc. GPI No. WNY-2500056.00 Page 4

Engineer’s Report December 2025 Fire protection for the proposed building will be provided by the existing hydrant in front of 270 Quaker Road approximately 250± feet northeast of the proposed building. The distance from the hydrant to the most remote portion of the proposed building (southwest corner) is approximately 475± feet. This exceeds the maximum distance of 400-feet per §507.5 Fire Hydrant Systems within the New York State Fire Code 2025. The Owner is currently seeking a variance from this code requirement through the NYS Department of State. 3. Hydraulic Analysis Hydraulic modeling of the existing water distribution system and proposed water service was conducted using the Bentley product WaterCAD to determine if the system is capable of sufficiently supplying the site with adequate pressures under the various design flows. The model was calibrated to match the results of a hydrant flow test (dated June 17 th 2019) performed by the Erie County Water Authority on the existing fire hydrant (residual) in front of 431 Quaker Road approximately 850-feet west of the project site and the existing fire hydrant (flow) in front of 25 Jewett Holmwood Road approximately 1,300-feet west of the project site. The results of their test are included in Appendix B and are summarized as follows: the main has a static pressure of 81 psi and 64 psi residual at the flow rate of 1,113 gpm during the hydrant flow test, with a flow of 2,219 gpm at the minimum required residual pressure of 20 psi. A water analysis was performed using this flow test data, the various flow scenarios concluded that there is sufficient pressure and flow available for the proposed development. The results of the critical nodes within the model are displayed below: Distribution System Water Service Residual Scenario Residual Pressure at Pressure at J-4 Ex. Hyd. (270 Quaker Rd) Maximum Demand 77 81 Max. Demand with Fire Flow 54 56 The required water distribution system design pressures per Section 8.2.1 of the “Recommended Standards for Waterworks, 2018 Edition” are as follows: 1. Minimum normal operation pressure: 35 psi 2. Maximum normal operation pressure: 80 psi 3. Minimum pressure in main under fire flow: 20 psi As shown in the previous table, the system as modeled meets these requirements. A full print out for the hydraulic model under various scenarios including tables and an exhibit map can be found in Appendix B. Greenman-Pedersen, Inc. GPI No. WNY-2500056.00 Page 5

Engineer’s Report December 2025 C. Stormwater Management 1. Existing Conditions The project site (0.70± acres) currently contains an 1,860± ft² commercial building, 11 parking spaces, and grass/wooded area surrounding the building and parking area. The topography of the project site is sloped towards Quaker Road (US 20A). Stormwater generally flows to the existing storm sewer system or to the south of the site. The project site consists of 0.57± acres of pervious area and 0.14± acres of impervious area (0.01± acres within the Quaker Road ROW (US 20A)). According to the New York State Department of Environmental Conservation (NYSDEC) Environmental Resource Mapper, no portion of the project site contains any state regulated or federal wetlands. See Exhibit 2 – NYSDEC Environmental Resource Mapper. The Federal Insurance Rate Maps (FIRM) for the Town of Aurora, Erie County, New York prepared by the Federal Emergency Management Agency Community Panel No. FM36029C0369H dated June 7th, 2019, indicates that the proposed project site contains no area within the 100- year floodplain. See Exhibit 3 – FEMA Firmette. Based on the USDA Web Soil Survey, the site is considered to contain 97% Niagara silt loam (NfA) and 3% Canandaigua silt loam (Cc). It is assumed that this soil type has a hydraulic classification of “C/D” and the site is described as 100% poorly drained soil (See Exhibit 4 – Site Soil Map). 2. Post Developed Conditions The post developed watershed boundary includes the same total drainage area as the pre-developed watershed. The stormwater from the proposed building and parking area will be conveyed to the new catch basins within the proposed parking area which drains to the NYSDOT existing catch basin within the Quaker Road ROW (US 20A). Within the proposed stormwater conveyance system, a two (2) foot deep flat bottom swale is proposed to mitigate some of the stormwater runoff from a portion of the building and the southern parking area. The catch basins within the southern parking area and most of the building’s roof leaders are tributary to the proposed swale which will detain a portion of the runoff prior to discharging the excess stormwater into the northern part of the proposed stormwater conveyance system which ultimately discharges into the existing stormwater conveyance system within Quaker Road (US 20A). The proposed swale daylights the stormwater runoff and creates a delay in the peak runoff from the southern portion entering the northern portion of the proposed stormwater conveyance system. This delay allows for the existing storm sewers within Quaker Road (US 20A) to contain a lesser flow rate during the peaks of the storm events reducing the probability of flooding. The watershed delineation maps can be found Greenman-Pedersen, Inc. GPI No. WNY-2500056.00 Page 6

Engineer’s Report December 2025 in Appendix A. The proposed development will disturb approximately 0.54± acres (0.01± acres of total disturbance area is within Quaker Road ROW (US 20A) for pavement connection and restoration) and will consist of 0.31± acres of pervious area with 0.39± acres of impervious area. Because the proposed development is a redevelopment with a disturbance area less than one acre, only erosion and sediment control measures are required. Hydrographs representing pre-development and post-development runoff have been generated using the Soil Conservation Service-TR-55 and TR- 20 methodology utilizing HydroCAD software. Hydrographs for the 1, 10, 25, and 100-year storm events under existing conditions and the 1, 10, 25, and 100-year storm events under proposed conditions were generated and are included in Appendix A. The post developed discharge rates from the proposed stormwater conveyance system will not exceed the existing runoff rates for the 1-year, 10-year, 25-year, and 100-year storm events of the corresponding pre-development drainage area. The following table summarizes these pre-development and post development peak runoff conditions for the project site: Stormwater Runoff Summary Proposed Swale Pre-Development Post Development High Water Peak Runoff Rate Peak Runoff Rate Elevation (ft) (cfs) (cfs) Top of Bank 902.00 (Link “PRE”) (Link “POST”) (Pond “SWALE”) 1-Year 0.45 0.45 900.91 10-Year 1.07 0.93 901.23 25-Year 1.46 1.24 901.40 100-Year 2.29 2.11 901.93 3. NYSDEC SPDES General Permit The proposed development will result in less than 1-acre of soil disturbance and therefore does not require a NYSDEC SPDES General Permit for Stormwater Discharges from Construction Activity, GP-0-25-001 or preparation of the associated Stormwater Pollution Prevention Plan (SWPPP). However, temporary erosion and sediment control measures were incorporated into the design plans. Greenman-Pedersen, Inc. GPI No. WNY-2500056.00 Page 7

APPENDIX A STORMWATER CALCULATIONS AND MODELS

EXIST I. PIPE x ST x Engineering Design Planning 903 WV W Construction Management SSx 904 UP (716) 633-4844 GPINET.COM WATER ST x Greenman - Pedersen, Inc. 2 METER 90 4950 Genesee Street, Suite 100 90 RCVR 5 RIM 901.57 ST MH PIT W Buffalo, NY, 14225 RIM 903.63 WV W SSx CHPRIVAT W INV 897.53-12" 30"OAK WV ST x ( SSx S INV 898.45-12" WV S INV 899.12-12" EV E R N INV 899.15-12" AL OAD RCVR 2 E INV 897.48-18" PREPARED FOR N 90 RIM 901.54 SSx RO ) W INV 897.53-18" W E INV 899.19-12" CB WV 902 SPEED ST x PCW Enterprises, LLC AD LIMIT W SIGN S 4185 East Blood Road S WV CB S S SAN MH RIM 902.29 Cowlesville, NY 14037 90 D 903.62 90 4 W INV 894.07-8" ST x 5 2 STREET 90 E INV 893.97-8" 14"SPRUCE SIGN N INV 894.09-8" CB RCVR. AS ST x 2" G 22"OAK RIM 902.30 N INV 899.15 ST x 902 903 30"OAK 5 ST x RCVR. 90 903 RIM902.41 W INV 898.69-12" ST x 4"CHERRY 0 20' 40' STONE E INV 898.61-12" A LK DRIVEWAY MILE 904 MARKER SIDEW SCALE IN FEET ST x CB 903 NC. 901 CO 20" 10 " UP 20"x20"x12" S D.I. 2"CHERRY T. C 3 TEES ST x P. 90 D.I. 902 P. 5 ST x ASI 90 12" NG DR X BO WV W AIL 4"CHERRY IVE AS 4 M SPEED 2" G 90 ST x LIMIT BFV WA W ST MH x WV SIGN W WV ST PEDESTRIAN W Y RIM 905.01 CROSSING 4"CHERRY WATER 2 S INV 898.94-12" W WV W 90 BFV METER PIT W INV 898.26-18" UP E INV 898.19-18" D 905.02 ST x 903 W 906 RCVR 12"x12"x12" TEE 905 904 CB RCVR RO UTE 20 O AD RIM903.35 W INV 899.23-12" -5) 4"CHERRY AS R RES) (SP RIM 903.00 ST x NY S E INV 899.23-12" CP 8" G 12"x8" KEH VARI SUMP 899.40 C REDUCERS 0" P WEST LINE OF THE VILLAGE OF EAST AURORA PLUGGED A T 2 UP QU (WID CB C/E Town of Aurora, NY 14052 EAST LINE OF THE TOWN OF AURORA 359 QUAKER ROAD FAR MEDICAL OFFICES ASPHALT 904 RIE 3 904 90 4 ST x 90 DRIVEWAY RL BY DRAIN C/E ANE AS 2" G RIM 902.70 3 90 ST x 359 Quaker Road ALK 4"MAPLE OX EW IL B . SID C/E MA ON C C UP 904 AS 20' PRIVATE ST x 8" G 3 RCVR 4"MAPLE 90 RIM 903.78 EXIST REBAR C/E UTILITY EASEMENT ONLINE, 1.7'W E INV 899.60 CB 12" HDPE PL C/E FLOOD LT. PL BY DRAIN 20" 8" D 4"MAPLE RIM 902.74 4 32"MAPLE 90 PL SIGN ST. .I.P ALK 24"PINE DEW 904 CAS . SI NC. CO ING 6"MAPLE WV PL -5) UP ( SP UP MONITORING CP 3 904 PC 90 WELL COVER 905 M ' D& 20" 149 .83 RIM 905.63 5 WATERLINE PL W PAINT MARKS AS LIGHT PL W 6"MAPLE 8" G POLE ASPHALT 50"POPLAR WV AREA ASPHALTTO 24"CHERRY PARKING PARKING ROAD: LOT LOT QUAKER UP 0.13± ACRES 903 3 4" C GAS GV G EXIST REBAR ONLINE, 0.1'E (NOW OR FORMERLY) 'D OP SER 200 API DELEVAN INC. PE 'M L.-10914, P.-5766 VIC RS P1L98.45 N:\2025\WNY-2500056.00 359 QUAKER ROAD SITE PLAN\Design\Engineering\Drainage\WNY-2500056.00_Hydrology.dwg Monday, 1 December 2025 1:16PM 90 PL E- VE ERV 5 DRI 2 STORY BRICK C. APP WARNING: ALTERATIONS TO THIS CON OFFICE BUILDING ICE LANDSCAPE 4" INV 903.47 DOCUMENT NOT CONFORMING TO RO AREA 270 QUAKER RD. SECTION 7209, SUBDIVISION 2, - AP STATE EDUCATION LAW, ARE PROHIBITED X. C PV C. LANDSCAPE 4" LOC CON PRO C. AREA P CON AM 7.2 9 C. R ATI . 90 REVISIONS X. L N CO F . F ON OC 1 STORY FRAME DATE ATI C. BUILDING VC 4" INV 903.17 4" P CON PL PL904 ON AIR 369 QUAKER RD. 90 903 CONDITIONER 5 AC G RIM 905.46 AREA TO GAS EASTERN 904 METER 26"MAPLE PROPERTY: 0.09± ACRES RIM 904.22 AREA TO IC EPT N SEWER 903 . S WESTERN X RO CATI O CLEANOUT PL PROPERTY: APPLD LO PL FIE REVISION 0.30± ACRES 90 OF 64"OAK 2 ASPHALT (NOW OR FORMERLY) E PARKING LIN RLY JR. PBI HOLDINGS OF WNY LLC THE A. D 93 LOT YE L.-11283, P.-427 NOR RGE P.-3 902 AREA=0.69± ACRE T E AS , NO. GE 7192 O L.- PL AREA TO October 2025 PL SOUTHERN DRAWN/DESIGN BY CHECKED BY PROPERTY: JS JB 0.17± ACRES UP 200 .33' D D (NOW OR FORMERLY) .09' 204 3095 SOUTHWESTERN BLVD. INC. L.-11010, P.-406 AR EB 4'E 1 STORY GLASS & T R E, 0. M I S EX LIN .42' PL STUCCO BUILDING ON 400 QUAKER RD. PL 203 Pre-Development Drainage Areas PL D 0' 15 .0 0' M PL 150 PL SCALE: 1" = 20' PL WNY-2500056.00 SET REBAR 01 of 01

Pre-Development AQR Area to Quaker Road AEP Area to Eastern Property PRE Pre-Development ASP Area to Southern Property AWP Area to Western Property Routing Diagram for WNY-2500056.00_HydroCAD Subcat Reach Pond Link Prepared by Greenman-Pedersen, Inc, Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 2 Rainfall Events Listing Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 1-yr extreme_precip_tables_output (29) 24-hr S1 1-yr Default 24.00 1 1.88 2 2 10-yr extreme_precip_tables_output (29) 24-hr S1 10-yr Default 24.00 1 3.14 2 3 25-yr extreme_precip_tables_output (29) 24-hr S1 25-yr Default 24.00 1 3.85 2 4 100-yr extreme_precip_tables_output (29) 24-hr S1 100-yr Default 24.00 1 5.25 2

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 3 Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 0.550 80 >75% Grass cover, Good, HSG D (AEP, AQR, ASP, AWP) 0.140 98 Paved parking, HSG D (AEP, AQR) 0.690 84 TOTAL AREA

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 4 Soil Listing (selected nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.690 HSG D AEP, AQR, ASP, AWP 0.000 Other 0.690 TOTAL AREA

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 5 Ground Covers (selected nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 0.550 0.000 0.550 >75% Grass cover, Good AEP, AQR, ASP, AWP 0.000 0.000 0.000 0.140 0.000 0.140 Paved parking AEP, AQR 0.000 0.000 0.000 0.690 0.000 0.690 TOTAL AREA

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 6 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment AEP: Area to Eastern Property Runoff Area=0.090 ac 44.44% Impervious Runoff Depth>0.87" Flow Length=27' Slope=0.0521 '/' Tc=4.1 min CN=88 Runoff=0.13 cfs 0.007 af Subcatchment AQR: Area to Quaker Road Runoff Area=0.130 ac 76.92% Impervious Runoff Depth>1.28" Flow Length=79' Tc=8.0 min CN=94 Runoff=0.24 cfs 0.014 af Subcatchment ASP: Area to Southern Property Runoff Area=0.170 ac 0.00% Impervious Runoff Depth>0.49" Flow Length=135' Slope=0.0138 '/' Tc=25.4 min CN=80 Runoff=0.06 cfs 0.007 af Subcatchment AWP: Area to Western Property Runoff Area=0.300 ac 0.00% Impervious Runoff Depth>0.49" Flow Length=89' Slope=0.0284 '/' Tc=13.6 min CN=80 Runoff=0.14 cfs 0.012 af Link PRE: Pre-Development Inflow=0.45 cfs 0.040 af Primary=0.45 cfs 0.040 af Total Runoff Area = 0.690 ac Runoff Volume = 0.040 af Average Runoff Depth = 0.69" 79.71% Pervious = 0.550 ac 20.29% Impervious = 0.140 ac

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment AEP: Area to Eastern Property Runoff = 0.13 cfs @ 12.02 hrs, Volume= 0.007 af, Depth> 0.87" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.040 98 Paved parking, HSG D 0.050 80 >75% Grass cover, Good, HSG D 0.090 88 Weighted Average 0.050 55.56% Pervious Area 0.040 44.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.1 27 0.0521 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment AEP: Area to Eastern Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 8 Subcatchment AEP: Area to Eastern Property Hydrograph Runoff 0.14 0.13 cfs 0.13 extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" 0.12 Runoff Area=0.090 ac Runoff Volume=0.007 af 0.11 Runoff Depth>0.87" 0.1 Flow Length=27' Slope=0.0521 '/' 0.09 Tc=4.1 min CN=88 Flow (cfs) 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 9 Hydrograph for Subcatchment AEP: Area to Eastern Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.00 0.00 18.00 1.73 0.75 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.00 0.00 18.25 1.74 0.76 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.00 0.00 18.50 1.75 0.77 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.00 0.00 18.75 1.75 0.77 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.00 0.00 19.00 1.76 0.78 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.01 0.00 19.25 1.77 0.78 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.01 0.00 19.50 1.78 0.79 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.01 0.00 19.75 1.78 0.79 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.02 0.00 20.00 1.79 0.80 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.03 0.00 20.25 1.80 0.80 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.04 0.01 20.50 1.80 0.81 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.08 0.02 20.75 1.81 0.81 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.28 0.13 21.00 1.81 0.82 0.00 3.25 0.07 0.00 0.00 12.25 1.26 0.41 0.04 21.25 1.82 0.82 0.00 3.50 0.08 0.00 0.00 12.50 1.37 0.49 0.03 21.50 1.83 0.83 0.00 3.75 0.08 0.00 0.00 12.75 1.41 0.52 0.01 21.75 1.83 0.83 0.00 4.00 0.09 0.00 0.00 13.00 1.45 0.54 0.01 22.00 1.84 0.84 0.00 4.25 0.10 0.00 0.00 13.25 1.48 0.56 0.01 22.25 1.84 0.84 0.00 4.50 0.10 0.00 0.00 13.50 1.50 0.58 0.01 22.50 1.85 0.85 0.00 4.75 0.11 0.00 0.00 13.75 1.52 0.60 0.01 22.75 1.85 0.85 0.00 5.00 0.12 0.00 0.00 14.00 1.54 0.61 0.01 23.00 1.86 0.85 0.00 5.25 0.13 0.00 0.00 14.25 1.56 0.63 0.00 23.25 1.86 0.86 0.00 5.50 0.13 0.00 0.00 14.50 1.58 0.64 0.00 23.50 1.87 0.86 0.00 5.75 0.14 0.00 0.00 14.75 1.59 0.65 0.00 23.75 1.88 0.87 0.00 6.00 0.15 0.00 0.00 15.00 1.61 0.66 0.00 24.00 1.88 0.87 0.00 6.25 0.16 0.00 0.00 15.25 1.62 0.67 0.00 6.50 0.17 0.00 0.00 15.50 1.63 0.68 0.00 6.75 0.18 0.00 0.00 15.75 1.64 0.69 0.00 7.00 0.19 0.00 0.00 16.00 1.66 0.70 0.00 7.25 0.19 0.00 0.00 16.25 1.67 0.70 0.00 7.50 0.20 0.00 0.00 16.50 1.68 0.71 0.00 7.75 0.22 0.00 0.00 16.75 1.69 0.72 0.00 8.00 0.23 0.00 0.00 17.00 1.70 0.73 0.00 8.25 0.24 0.00 0.00 17.25 1.71 0.73 0.00 8.50 0.25 0.00 0.00 17.50 1.71 0.74 0.00 8.75 0.26 0.00 0.00 17.75 1.72 0.75 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 10 Summary for Subcatchment AQR: Area to Quaker Road Runoff = 0.24 cfs @ 12.06 hrs, Volume= 0.014 af, Depth> 1.28" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.100 98 Paved parking, HSG D 0.030 80 >75% Grass cover, Good, HSG D 0.130 94 Weighted Average 0.030 23.08% Pervious Area 0.100 76.92% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.3 18 0.0408 0.09 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 0.7 37 0.0196 0.93 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" 4.0 24 0.0429 0.10 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 8.0 79 Total Subcatchment AQR: Area to Quaker Road

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 11 Subcatchment AQR: Area to Quaker Road Hydrograph 0.26 Runoff 0.25 0.24 cfs 0.24 extreme_precip_tables_output (29) 24-hr S1 1-yr 0.23 Rainfall=1.88" 0.22 Runoff Area=0.130 ac 0.21 Runoff Volume=0.014 af 0.2 0.19 Runoff Depth>1.28" 0.18 Flow Length=79' 0.17 Tc=8.0 min 0.16 CN=94 0.15 Flow (cfs) 0.14 0.13 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 12 Hydrograph for Subcatchment AQR: Area to Quaker Road Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.03 0.00 18.00 1.73 1.15 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.03 0.00 18.25 1.74 1.15 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.04 0.00 18.50 1.75 1.16 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.05 0.00 18.75 1.75 1.17 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.05 0.00 19.00 1.76 1.18 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.06 0.00 19.25 1.77 1.18 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.07 0.01 19.50 1.78 1.19 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.09 0.01 19.75 1.78 1.19 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.10 0.01 20.00 1.79 1.20 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.12 0.01 20.25 1.80 1.21 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.15 0.01 20.50 1.80 1.21 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.23 0.04 20.75 1.81 1.22 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.54 0.16 21.00 1.81 1.22 0.00 3.25 0.07 0.00 0.00 12.25 1.26 0.72 0.10 21.25 1.82 1.23 0.00 3.50 0.08 0.00 0.00 12.50 1.37 0.82 0.05 21.50 1.83 1.24 0.00 3.75 0.08 0.00 0.00 12.75 1.41 0.86 0.02 21.75 1.83 1.24 0.00 4.00 0.09 0.00 0.00 13.00 1.45 0.89 0.02 22.00 1.84 1.25 0.00 4.25 0.10 0.00 0.00 13.25 1.48 0.92 0.01 22.25 1.84 1.25 0.00 4.50 0.10 0.00 0.00 13.50 1.50 0.94 0.01 22.50 1.85 1.26 0.00 4.75 0.11 0.00 0.00 13.75 1.52 0.96 0.01 22.75 1.85 1.26 0.00 5.00 0.12 0.00 0.00 14.00 1.54 0.97 0.01 23.00 1.86 1.27 0.00 5.25 0.13 0.00 0.00 14.25 1.56 0.99 0.01 23.25 1.86 1.27 0.00 5.50 0.13 0.00 0.00 14.50 1.58 1.01 0.01 23.50 1.87 1.28 0.00 5.75 0.14 0.00 0.00 14.75 1.59 1.02 0.01 23.75 1.88 1.28 0.00 6.00 0.15 0.00 0.00 15.00 1.61 1.03 0.01 24.00 1.88 1.28 0.00 6.25 0.16 0.00 0.00 15.25 1.62 1.04 0.01 6.50 0.17 0.00 0.00 15.50 1.63 1.06 0.01 6.75 0.18 0.00 0.00 15.75 1.64 1.07 0.01 7.00 0.19 0.00 0.00 16.00 1.66 1.08 0.01 7.25 0.19 0.01 0.00 16.25 1.67 1.09 0.01 7.50 0.20 0.01 0.00 16.50 1.68 1.10 0.00 7.75 0.22 0.01 0.00 16.75 1.69 1.11 0.00 8.00 0.23 0.01 0.00 17.00 1.70 1.11 0.00 8.25 0.24 0.02 0.00 17.25 1.71 1.12 0.00 8.50 0.25 0.02 0.00 17.50 1.71 1.13 0.00 8.75 0.26 0.02 0.00 17.75 1.72 1.14 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 13 Summary for Subcatchment ASP: Area to Southern Property Runoff = 0.06 cfs @ 12.35 hrs, Volume= 0.007 af, Depth> 0.49" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.170 80 >75% Grass cover, Good, HSG D 0.170 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 25.4 135 0.0138 0.09 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment ASP: Area to Southern Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 14 Subcatchment ASP: Area to Southern Property Hydrograph Runoff 0.065 0.06 cfs 0.06 extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" 0.055 Runoff Area=0.170 ac Runoff Volume=0.007 af 0.05 Runoff Depth>0.49" Flow Length=135' 0.045 Slope=0.0138 '/' Tc=25.4 min 0.04 CN=80 Flow (cfs) 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 15 Hydrograph for Subcatchment ASP: Area to Southern Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.00 0.00 18.00 1.73 0.41 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.00 0.00 18.25 1.74 0.41 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.00 0.00 18.50 1.75 0.41 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.00 0.00 18.75 1.75 0.42 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.00 0.00 19.00 1.76 0.42 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.00 0.00 19.25 1.77 0.43 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.00 0.00 19.50 1.78 0.43 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.00 0.00 19.75 1.78 0.44 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.00 0.00 20.00 1.79 0.44 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.00 0.00 20.25 1.80 0.44 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.00 0.00 20.50 1.80 0.45 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.01 0.00 20.75 1.81 0.45 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.10 0.01 21.00 1.81 0.45 0.00 3.25 0.07 0.00 0.00 12.25 1.26 0.18 0.05 21.25 1.82 0.46 0.00 3.50 0.08 0.00 0.00 12.50 1.37 0.22 0.05 21.50 1.83 0.46 0.00 3.75 0.08 0.00 0.00 12.75 1.41 0.24 0.03 21.75 1.83 0.46 0.00 4.00 0.09 0.00 0.00 13.00 1.45 0.26 0.02 22.00 1.84 0.47 0.00 4.25 0.10 0.00 0.00 13.25 1.48 0.27 0.01 22.25 1.84 0.47 0.00 4.50 0.10 0.00 0.00 13.50 1.50 0.29 0.01 22.50 1.85 0.47 0.00 4.75 0.11 0.00 0.00 13.75 1.52 0.30 0.01 22.75 1.85 0.48 0.00 5.00 0.12 0.00 0.00 14.00 1.54 0.31 0.01 23.00 1.86 0.48 0.00 5.25 0.13 0.00 0.00 14.25 1.56 0.32 0.01 23.25 1.86 0.48 0.00 5.50 0.13 0.00 0.00 14.50 1.58 0.32 0.01 23.50 1.87 0.49 0.00 5.75 0.14 0.00 0.00 14.75 1.59 0.33 0.01 23.75 1.88 0.49 0.00 6.00 0.15 0.00 0.00 15.00 1.61 0.34 0.01 24.00 1.88 0.49 0.00 6.25 0.16 0.00 0.00 15.25 1.62 0.35 0.01 6.50 0.17 0.00 0.00 15.50 1.63 0.35 0.00 6.75 0.18 0.00 0.00 15.75 1.64 0.36 0.00 7.00 0.19 0.00 0.00 16.00 1.66 0.37 0.00 7.25 0.19 0.00 0.00 16.25 1.67 0.37 0.00 7.50 0.20 0.00 0.00 16.50 1.68 0.38 0.00 7.75 0.22 0.00 0.00 16.75 1.69 0.38 0.00 8.00 0.23 0.00 0.00 17.00 1.70 0.39 0.00 8.25 0.24 0.00 0.00 17.25 1.71 0.39 0.00 8.50 0.25 0.00 0.00 17.50 1.71 0.40 0.00 8.75 0.26 0.00 0.00 17.75 1.72 0.40 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 16 Summary for Subcatchment AWP: Area to Western Property Runoff = 0.14 cfs @ 12.16 hrs, Volume= 0.012 af, Depth> 0.49" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.300 80 >75% Grass cover, Good, HSG D 0.300 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 89 0.0284 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment AWP: Area to Western Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 17 Subcatchment AWP: Area to Western Property Hydrograph 0.16 Runoff 0.15 0.14 cfs extreme_precip_tables_output (29) 24-hr S1 1-yr 0.14 Rainfall=1.88" 0.13 Runoff Area=0.300 ac Runoff Volume=0.012 af 0.12 Runoff Depth>0.49" 0.11 Flow Length=89' Slope=0.0284 '/' 0.1 Tc=13.6 min CN=80 Flow (cfs) 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 18 Hydrograph for Subcatchment AWP: Area to Western Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.00 0.00 18.00 1.73 0.41 0.01 0.25 0.00 0.00 0.00 9.25 0.29 0.00 0.00 18.25 1.74 0.41 0.01 0.50 0.01 0.00 0.00 9.50 0.31 0.00 0.00 18.50 1.75 0.41 0.01 0.75 0.02 0.00 0.00 9.75 0.32 0.00 0.00 18.75 1.75 0.42 0.01 1.00 0.02 0.00 0.00 10.00 0.34 0.00 0.00 19.00 1.76 0.42 0.01 1.25 0.03 0.00 0.00 10.25 0.36 0.00 0.00 19.25 1.77 0.43 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.00 0.00 19.50 1.78 0.43 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.00 0.00 19.75 1.78 0.44 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.00 0.00 20.00 1.79 0.44 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.00 0.00 20.25 1.80 0.44 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.00 0.00 20.50 1.80 0.45 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.01 0.00 20.75 1.81 0.45 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.10 0.04 21.00 1.81 0.45 0.00 3.25 0.07 0.00 0.00 12.25 1.26 0.18 0.12 21.25 1.82 0.46 0.00 3.50 0.08 0.00 0.00 12.50 1.37 0.22 0.07 21.50 1.83 0.46 0.00 3.75 0.08 0.00 0.00 12.75 1.41 0.24 0.03 21.75 1.83 0.46 0.00 4.00 0.09 0.00 0.00 13.00 1.45 0.26 0.02 22.00 1.84 0.47 0.00 4.25 0.10 0.00 0.00 13.25 1.48 0.27 0.02 22.25 1.84 0.47 0.00 4.50 0.10 0.00 0.00 13.50 1.50 0.29 0.02 22.50 1.85 0.47 0.00 4.75 0.11 0.00 0.00 13.75 1.52 0.30 0.01 22.75 1.85 0.48 0.00 5.00 0.12 0.00 0.00 14.00 1.54 0.31 0.01 23.00 1.86 0.48 0.00 5.25 0.13 0.00 0.00 14.25 1.56 0.32 0.01 23.25 1.86 0.48 0.00 5.50 0.13 0.00 0.00 14.50 1.58 0.32 0.01 23.50 1.87 0.49 0.00 5.75 0.14 0.00 0.00 14.75 1.59 0.33 0.01 23.75 1.88 0.49 0.00 6.00 0.15 0.00 0.00 15.00 1.61 0.34 0.01 24.00 1.88 0.49 0.00 6.25 0.16 0.00 0.00 15.25 1.62 0.35 0.01 6.50 0.17 0.00 0.00 15.50 1.63 0.35 0.01 6.75 0.18 0.00 0.00 15.75 1.64 0.36 0.01 7.00 0.19 0.00 0.00 16.00 1.66 0.37 0.01 7.25 0.19 0.00 0.00 16.25 1.67 0.37 0.01 7.50 0.20 0.00 0.00 16.50 1.68 0.38 0.01 7.75 0.22 0.00 0.00 16.75 1.69 0.38 0.01 8.00 0.23 0.00 0.00 17.00 1.70 0.39 0.01 8.25 0.24 0.00 0.00 17.25 1.71 0.39 0.01 8.50 0.25 0.00 0.00 17.50 1.71 0.40 0.01 8.75 0.26 0.00 0.00 17.75 1.72 0.40 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 19 Summary for Link PRE: Pre-Development Inflow Area = 0.690 ac, 20.29% Impervious, Inflow Depth > 0.69" for 1-yr event Inflow = 0.45 cfs @ 12.07 hrs, Volume= 0.040 af Primary = 0.45 cfs @ 12.07 hrs, Volume= 0.040 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link PRE: Pre-Development Hydrograph Inflow 0.5 0.45 cfs Primary 0.48 0.45 cfs 0.46 0.44 Inflow Area=0.690 ac 0.42 0.4 0.38 0.36 0.34 0.32 0.3 Flow (cfs) 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 20 Hydrograph for Link PRE: Pre-Development Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 9.00 0.00 0.00 0.00 18.00 0.02 0.00 0.02 0.25 0.00 0.00 0.00 9.25 0.00 0.00 0.00 18.25 0.01 0.00 0.01 0.50 0.00 0.00 0.00 9.50 0.00 0.00 0.00 18.50 0.01 0.00 0.01 0.75 0.00 0.00 0.00 9.75 0.00 0.00 0.00 18.75 0.01 0.00 0.01 1.00 0.00 0.00 0.00 10.00 0.00 0.00 0.00 19.00 0.01 0.00 0.01 1.25 0.00 0.00 0.00 10.25 0.01 0.00 0.01 19.25 0.01 0.00 0.01 1.50 0.00 0.00 0.00 10.50 0.01 0.00 0.01 19.50 0.01 0.00 0.01 1.75 0.00 0.00 0.00 10.75 0.01 0.00 0.01 19.75 0.01 0.00 0.01 2.00 0.00 0.00 0.00 11.00 0.01 0.00 0.01 20.00 0.01 0.00 0.01 2.25 0.00 0.00 0.00 11.25 0.01 0.00 0.01 20.25 0.01 0.00 0.01 2.50 0.00 0.00 0.00 11.50 0.02 0.00 0.02 20.50 0.01 0.00 0.01 2.75 0.00 0.00 0.00 11.75 0.06 0.00 0.06 20.75 0.01 0.00 0.01 3.00 0.00 0.00 0.00 12.00 0.34 0.00 0.34 21.00 0.01 0.00 0.01 3.25 0.00 0.00 0.00 12.25 0.31 0.00 0.31 21.25 0.01 0.00 0.01 3.50 0.00 0.00 0.00 12.50 0.20 0.00 0.20 21.50 0.01 0.00 0.01 3.75 0.00 0.00 0.00 12.75 0.10 0.00 0.10 21.75 0.01 0.00 0.01 4.00 0.00 0.00 0.00 13.00 0.06 0.00 0.06 22.00 0.01 0.00 0.01 4.25 0.00 0.00 0.00 13.25 0.05 0.00 0.05 22.25 0.01 0.00 0.01 4.50 0.00 0.00 0.00 13.50 0.04 0.00 0.04 22.50 0.01 0.00 0.01 4.75 0.00 0.00 0.00 13.75 0.04 0.00 0.04 22.75 0.01 0.00 0.01 5.00 0.00 0.00 0.00 14.00 0.03 0.00 0.03 23.00 0.01 0.00 0.01 5.25 0.00 0.00 0.00 14.25 0.03 0.00 0.03 23.25 0.01 0.00 0.01 5.50 0.00 0.00 0.00 14.50 0.03 0.00 0.03 23.50 0.01 0.00 0.01 5.75 0.00 0.00 0.00 14.75 0.03 0.00 0.03 23.75 0.01 0.00 0.01 6.00 0.00 0.00 0.00 15.00 0.02 0.00 0.02 24.00 0.01 0.00 0.01 6.25 0.00 0.00 0.00 15.25 0.02 0.00 0.02 6.50 0.00 0.00 0.00 15.50 0.02 0.00 0.02 6.75 0.00 0.00 0.00 15.75 0.02 0.00 0.02 7.00 0.00 0.00 0.00 16.00 0.02 0.00 0.02 7.25 0.00 0.00 0.00 16.25 0.02 0.00 0.02 7.50 0.00 0.00 0.00 16.50 0.02 0.00 0.02 7.75 0.00 0.00 0.00 16.75 0.02 0.00 0.02 8.00 0.00 0.00 0.00 17.00 0.02 0.00 0.02 8.25 0.00 0.00 0.00 17.25 0.02 0.00 0.02 8.50 0.00 0.00 0.00 17.50 0.02 0.00 0.02 8.75 0.00 0.00 0.00 17.75 0.02 0.00 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 21 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment AEP: Area to Eastern Property Runoff Area=0.090 ac 44.44% Impervious Runoff Depth>1.94" Flow Length=27' Slope=0.0521 '/' Tc=4.1 min CN=88 Runoff=0.29 cfs 0.015 af Subcatchment AQR: Area to Quaker Road Runoff Area=0.130 ac 76.92% Impervious Runoff Depth>2.48" Flow Length=79' Tc=8.0 min CN=94 Runoff=0.44 cfs 0.027 af Subcatchment ASP: Area to Southern Property Runoff Area=0.170 ac 0.00% Impervious Runoff Depth>1.35" Flow Length=135' Slope=0.0138 '/' Tc=25.4 min CN=80 Runoff=0.19 cfs 0.019 af Subcatchment AWP: Area to Western Property Runoff Area=0.300 ac 0.00% Impervious Runoff Depth>1.35" Flow Length=89' Slope=0.0284 '/' Tc=13.6 min CN=80 Runoff=0.45 cfs 0.034 af Link PRE: Pre-Development Inflow=1.07 cfs 0.094 af Primary=1.07 cfs 0.094 af Total Runoff Area = 0.690 ac Runoff Volume = 0.094 af Average Runoff Depth = 1.64" 79.71% Pervious = 0.550 ac 20.29% Impervious = 0.140 ac

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 22 Summary for Subcatchment AEP: Area to Eastern Property Runoff = 0.29 cfs @ 12.01 hrs, Volume= 0.015 af, Depth> 1.94" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.040 98 Paved parking, HSG D 0.050 80 >75% Grass cover, Good, HSG D 0.090 88 Weighted Average 0.050 55.56% Pervious Area 0.040 44.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.1 27 0.0521 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment AEP: Area to Eastern Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 23 Subcatchment AEP: Area to Eastern Property Hydrograph 0.32 Runoff 0.29 cfs 0.3 extreme_precip_tables_output (29) 24-hr S1 10-yr 0.28 Rainfall=3.14" Runoff Area=0.090 ac 0.26 Runoff Volume=0.015 af 0.24 Runoff Depth>1.94" Flow Length=27' 0.22 Slope=0.0521 '/' 0.2 Tc=4.1 min CN=88 Flow (cfs) 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 24 Hydrograph for Subcatchment AEP: Area to Eastern Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.02 0.00 18.00 2.91 1.74 0.00 0.25 0.01 0.00 0.00 9.25 0.45 0.02 0.00 18.25 2.92 1.75 0.00 0.50 0.02 0.00 0.00 9.50 0.48 0.03 0.00 18.50 2.93 1.76 0.00 0.75 0.02 0.00 0.00 9.75 0.50 0.03 0.00 18.75 2.95 1.77 0.00 1.00 0.03 0.00 0.00 10.00 0.53 0.04 0.00 19.00 2.96 1.78 0.00 1.25 0.04 0.00 0.00 10.25 0.57 0.05 0.00 19.25 2.97 1.79 0.00 1.50 0.05 0.00 0.00 10.50 0.60 0.06 0.00 19.50 2.98 1.80 0.00 1.75 0.06 0.00 0.00 10.75 0.64 0.08 0.01 19.75 2.99 1.81 0.00 2.00 0.06 0.00 0.00 11.00 0.69 0.10 0.01 20.00 3.00 1.82 0.00 2.25 0.07 0.00 0.00 11.25 0.75 0.12 0.01 20.25 3.01 1.83 0.00 2.50 0.08 0.00 0.00 11.50 0.82 0.16 0.01 20.50 3.02 1.84 0.00 2.75 0.09 0.00 0.00 11.75 1.05 0.28 0.05 20.75 3.03 1.84 0.00 3.00 0.10 0.00 0.00 12.00 1.74 0.76 0.28 21.00 3.04 1.85 0.00 3.25 0.11 0.00 0.00 12.25 2.12 1.06 0.09 21.25 3.05 1.86 0.00 3.50 0.12 0.00 0.00 12.50 2.33 1.24 0.06 21.50 3.06 1.87 0.00 3.75 0.13 0.00 0.00 12.75 2.40 1.30 0.02 21.75 3.07 1.88 0.00 4.00 0.14 0.00 0.00 13.00 2.46 1.35 0.02 22.00 3.08 1.89 0.00 4.25 0.15 0.00 0.00 13.25 2.51 1.39 0.01 22.25 3.08 1.89 0.00 4.50 0.16 0.00 0.00 13.50 2.55 1.42 0.01 22.50 3.09 1.90 0.00 4.75 0.17 0.00 0.00 13.75 2.58 1.45 0.01 22.75 3.10 1.91 0.00 5.00 0.18 0.00 0.00 14.00 2.61 1.48 0.01 23.00 3.11 1.92 0.00 5.25 0.20 0.00 0.00 14.25 2.64 1.50 0.01 23.25 3.12 1.92 0.00 5.50 0.21 0.00 0.00 14.50 2.67 1.52 0.01 23.50 3.12 1.93 0.00 5.75 0.22 0.00 0.00 14.75 2.69 1.55 0.01 23.75 3.13 1.94 0.00 6.00 0.23 0.00 0.00 15.00 2.71 1.56 0.01 24.00 3.14 1.94 0.00 6.25 0.25 0.00 0.00 15.25 2.73 1.58 0.01 6.50 0.26 0.00 0.00 15.50 2.75 1.60 0.01 6.75 0.27 0.00 0.00 15.75 2.77 1.62 0.01 7.00 0.29 0.00 0.00 16.00 2.79 1.63 0.01 7.25 0.30 0.00 0.00 16.25 2.81 1.65 0.01 7.50 0.32 0.00 0.00 16.50 2.82 1.66 0.01 7.75 0.33 0.00 0.00 16.75 2.84 1.68 0.00 8.00 0.35 0.00 0.00 17.00 2.85 1.69 0.00 8.25 0.37 0.01 0.00 17.25 2.87 1.70 0.00 8.50 0.39 0.01 0.00 17.50 2.88 1.71 0.00 8.75 0.41 0.01 0.00 17.75 2.90 1.73 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 25 Summary for Subcatchment AQR: Area to Quaker Road Runoff = 0.44 cfs @ 12.06 hrs, Volume= 0.027 af, Depth> 2.48" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.100 98 Paved parking, HSG D 0.030 80 >75% Grass cover, Good, HSG D 0.130 94 Weighted Average 0.030 23.08% Pervious Area 0.100 76.92% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.3 18 0.0408 0.09 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 0.7 37 0.0196 0.93 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" 4.0 24 0.0429 0.10 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 8.0 79 Total Subcatchment AQR: Area to Quaker Road

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 26 Subcatchment AQR: Area to Quaker Road Hydrograph Runoff 0.48 0.44 cfs 0.46 0.44 extreme_precip_tables_output (29) 24-hr S1 10-yr 0.42 Rainfall=3.14" 0.4 Runoff Area=0.130 ac 0.38 Runoff Volume=0.027 af 0.36 Runoff Depth>2.48" 0.34 Flow Length=79' 0.32 Tc=8.0 min 0.3 CN=94 0.28 Flow (cfs) 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 27 Hydrograph for Subcatchment AQR: Area to Quaker Road Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.10 0.01 18.00 2.91 2.26 0.01 0.25 0.01 0.00 0.00 9.25 0.45 0.11 0.01 18.25 2.92 2.27 0.01 0.50 0.02 0.00 0.00 9.50 0.48 0.12 0.01 18.50 2.93 2.29 0.01 0.75 0.02 0.00 0.00 9.75 0.50 0.14 0.01 18.75 2.95 2.30 0.01 1.00 0.03 0.00 0.00 10.00 0.53 0.16 0.01 19.00 2.96 2.31 0.01 1.25 0.04 0.00 0.00 10.25 0.57 0.18 0.01 19.25 2.97 2.32 0.01 1.50 0.05 0.00 0.00 10.50 0.60 0.20 0.01 19.50 2.98 2.33 0.01 1.75 0.06 0.00 0.00 10.75 0.64 0.23 0.01 19.75 2.99 2.34 0.01 2.00 0.06 0.00 0.00 11.00 0.69 0.26 0.02 20.00 3.00 2.35 0.01 2.25 0.07 0.00 0.00 11.25 0.75 0.31 0.02 20.25 3.01 2.36 0.01 2.50 0.08 0.00 0.00 11.50 0.82 0.36 0.03 20.50 3.02 2.37 0.01 2.75 0.09 0.00 0.00 11.75 1.05 0.55 0.09 20.75 3.03 2.38 0.00 3.00 0.10 0.00 0.00 12.00 1.74 1.16 0.32 21.00 3.04 2.39 0.00 3.25 0.11 0.00 0.00 12.25 2.12 1.51 0.19 21.25 3.05 2.40 0.00 3.50 0.12 0.00 0.00 12.50 2.33 1.71 0.11 21.50 3.06 2.41 0.00 3.75 0.13 0.00 0.00 12.75 2.40 1.78 0.04 21.75 3.07 2.41 0.00 4.00 0.14 0.00 0.00 13.00 2.46 1.83 0.03 22.00 3.08 2.42 0.00 4.25 0.15 0.00 0.00 13.25 2.51 1.87 0.02 22.25 3.08 2.43 0.00 4.50 0.16 0.00 0.00 13.50 2.55 1.91 0.02 22.50 3.09 2.44 0.00 4.75 0.17 0.00 0.00 13.75 2.58 1.95 0.02 22.75 3.10 2.45 0.00 5.00 0.18 0.00 0.00 14.00 2.61 1.98 0.02 23.00 3.11 2.46 0.00 5.25 0.20 0.01 0.00 14.25 2.64 2.00 0.01 23.25 3.12 2.46 0.00 5.50 0.21 0.01 0.00 14.50 2.67 2.03 0.01 23.50 3.12 2.47 0.00 5.75 0.22 0.01 0.00 14.75 2.69 2.05 0.01 23.75 3.13 2.48 0.00 6.00 0.23 0.01 0.00 15.00 2.71 2.07 0.01 24.00 3.14 2.49 0.00 6.25 0.25 0.02 0.00 15.25 2.73 2.09 0.01 6.50 0.26 0.02 0.00 15.50 2.75 2.11 0.01 6.75 0.27 0.03 0.00 15.75 2.77 2.13 0.01 7.00 0.29 0.03 0.00 16.00 2.79 2.15 0.01 7.25 0.30 0.04 0.00 16.25 2.81 2.16 0.01 7.50 0.32 0.04 0.00 16.50 2.82 2.18 0.01 7.75 0.33 0.05 0.00 16.75 2.84 2.19 0.01 8.00 0.35 0.06 0.00 17.00 2.85 2.21 0.01 8.25 0.37 0.07 0.00 17.25 2.87 2.22 0.01 8.50 0.39 0.08 0.00 17.50 2.88 2.24 0.01 8.75 0.41 0.09 0.01 17.75 2.90 2.25 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 28 Summary for Subcatchment ASP: Area to Southern Property Runoff = 0.19 cfs @ 12.33 hrs, Volume= 0.019 af, Depth> 1.35" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.170 80 >75% Grass cover, Good, HSG D 0.170 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 25.4 135 0.0138 0.09 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment ASP: Area to Southern Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 29 Subcatchment ASP: Area to Southern Property Hydrograph 0.21 Runoff 0.2 0.19 cfs 0.19 extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" 0.18 Runoff Area=0.170 ac 0.17 Runoff Volume=0.019 af 0.16 Runoff Depth>1.35" 0.15 Flow Length=135' 0.14 Slope=0.0138 '/' 0.13 Tc=25.4 min CN=80 Flow (cfs) 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 30 Hydrograph for Subcatchment ASP: Area to Southern Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.00 0.00 18.00 2.91 1.18 0.01 0.25 0.01 0.00 0.00 9.25 0.45 0.00 0.00 18.25 2.92 1.19 0.01 0.50 0.02 0.00 0.00 9.50 0.48 0.00 0.00 18.50 2.93 1.20 0.01 0.75 0.02 0.00 0.00 9.75 0.50 0.00 0.00 18.75 2.95 1.21 0.01 1.00 0.03 0.00 0.00 10.00 0.53 0.00 0.00 19.00 2.96 1.22 0.01 1.25 0.04 0.00 0.00 10.25 0.57 0.00 0.00 19.25 2.97 1.23 0.01 1.50 0.05 0.00 0.00 10.50 0.60 0.00 0.00 19.50 2.98 1.23 0.01 1.75 0.06 0.00 0.00 10.75 0.64 0.01 0.00 19.75 2.99 1.24 0.01 2.00 0.06 0.00 0.00 11.00 0.69 0.01 0.00 20.00 3.00 1.25 0.01 2.25 0.07 0.00 0.00 11.25 0.75 0.02 0.00 20.25 3.01 1.26 0.01 2.50 0.08 0.00 0.00 11.50 0.82 0.04 0.01 20.50 3.02 1.27 0.01 2.75 0.09 0.00 0.00 11.75 1.05 0.10 0.01 20.75 3.03 1.27 0.01 3.00 0.10 0.00 0.00 12.00 1.74 0.41 0.05 21.00 3.04 1.28 0.01 3.25 0.11 0.00 0.00 12.25 2.12 0.64 0.18 21.25 3.05 1.29 0.00 3.50 0.12 0.00 0.00 12.50 2.33 0.78 0.15 21.50 3.06 1.29 0.00 3.75 0.13 0.00 0.00 12.75 2.40 0.82 0.10 21.75 3.07 1.30 0.00 4.00 0.14 0.00 0.00 13.00 2.46 0.86 0.05 22.00 3.08 1.31 0.00 4.25 0.15 0.00 0.00 13.25 2.51 0.89 0.03 22.25 3.08 1.31 0.00 4.50 0.16 0.00 0.00 13.50 2.55 0.92 0.02 22.50 3.09 1.32 0.00 4.75 0.17 0.00 0.00 13.75 2.58 0.94 0.02 22.75 3.10 1.33 0.00 5.00 0.18 0.00 0.00 14.00 2.61 0.97 0.02 23.00 3.11 1.33 0.00 5.25 0.20 0.00 0.00 14.25 2.64 0.99 0.02 23.25 3.12 1.34 0.00 5.50 0.21 0.00 0.00 14.50 2.67 1.01 0.01 23.50 3.12 1.34 0.00 5.75 0.22 0.00 0.00 14.75 2.69 1.02 0.01 23.75 3.13 1.35 0.00 6.00 0.23 0.00 0.00 15.00 2.71 1.04 0.01 24.00 3.14 1.36 0.00 6.25 0.25 0.00 0.00 15.25 2.73 1.05 0.01 6.50 0.26 0.00 0.00 15.50 2.75 1.07 0.01 6.75 0.27 0.00 0.00 15.75 2.77 1.08 0.01 7.00 0.29 0.00 0.00 16.00 2.79 1.09 0.01 7.25 0.30 0.00 0.00 16.25 2.81 1.11 0.01 7.50 0.32 0.00 0.00 16.50 2.82 1.12 0.01 7.75 0.33 0.00 0.00 16.75 2.84 1.13 0.01 8.00 0.35 0.00 0.00 17.00 2.85 1.14 0.01 8.25 0.37 0.00 0.00 17.25 2.87 1.15 0.01 8.50 0.39 0.00 0.00 17.50 2.88 1.16 0.01 8.75 0.41 0.00 0.00 17.75 2.90 1.17 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 31 Summary for Subcatchment AWP: Area to Western Property Runoff = 0.45 cfs @ 12.15 hrs, Volume= 0.034 af, Depth> 1.35" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.300 80 >75% Grass cover, Good, HSG D 0.300 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 89 0.0284 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment AWP: Area to Western Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 32 Subcatchment AWP: Area to Western Property Hydrograph 0.5 Runoff 0.48 0.45 cfs 0.46 extreme_precip_tables_output (29) 24-hr S1 10-yr 0.44 Rainfall=3.14" 0.42 Runoff Area=0.300 ac 0.4 Runoff Volume=0.034 af 0.38 Runoff Depth>1.35" 0.36 Flow Length=89' 0.34 Slope=0.0284 '/' 0.32 Tc=13.6 min 0.3 CN=80 Flow (cfs) 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 33 Hydrograph for Subcatchment AWP: Area to Western Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.00 0.00 18.00 2.91 1.18 0.01 0.25 0.01 0.00 0.00 9.25 0.45 0.00 0.00 18.25 2.92 1.19 0.01 0.50 0.02 0.00 0.00 9.50 0.48 0.00 0.00 18.50 2.93 1.20 0.01 0.75 0.02 0.00 0.00 9.75 0.50 0.00 0.00 18.75 2.95 1.21 0.01 1.00 0.03 0.00 0.00 10.00 0.53 0.00 0.00 19.00 2.96 1.22 0.01 1.25 0.04 0.00 0.00 10.25 0.57 0.00 0.00 19.25 2.97 1.23 0.01 1.50 0.05 0.00 0.00 10.50 0.60 0.00 0.00 19.50 2.98 1.23 0.01 1.75 0.06 0.00 0.00 10.75 0.64 0.01 0.00 19.75 2.99 1.24 0.01 2.00 0.06 0.00 0.00 11.00 0.69 0.01 0.01 20.00 3.00 1.25 0.01 2.25 0.07 0.00 0.00 11.25 0.75 0.02 0.01 20.25 3.01 1.26 0.01 2.50 0.08 0.00 0.00 11.50 0.82 0.04 0.02 20.50 3.02 1.27 0.01 2.75 0.09 0.00 0.00 11.75 1.05 0.10 0.05 20.75 3.03 1.27 0.01 3.00 0.10 0.00 0.00 12.00 1.74 0.41 0.19 21.00 3.04 1.28 0.01 3.25 0.11 0.00 0.00 12.25 2.12 0.64 0.36 21.25 3.05 1.29 0.01 3.50 0.12 0.00 0.00 12.50 2.33 0.78 0.20 21.50 3.06 1.29 0.01 3.75 0.13 0.00 0.00 12.75 2.40 0.82 0.09 21.75 3.07 1.30 0.01 4.00 0.14 0.00 0.00 13.00 2.46 0.86 0.05 22.00 3.08 1.31 0.01 4.25 0.15 0.00 0.00 13.25 2.51 0.89 0.04 22.25 3.08 1.31 0.01 4.50 0.16 0.00 0.00 13.50 2.55 0.92 0.03 22.50 3.09 1.32 0.01 4.75 0.17 0.00 0.00 13.75 2.58 0.94 0.03 22.75 3.10 1.33 0.01 5.00 0.18 0.00 0.00 14.00 2.61 0.97 0.03 23.00 3.11 1.33 0.01 5.25 0.20 0.00 0.00 14.25 2.64 0.99 0.03 23.25 3.12 1.34 0.01 5.50 0.21 0.00 0.00 14.50 2.67 1.01 0.02 23.50 3.12 1.34 0.01 5.75 0.22 0.00 0.00 14.75 2.69 1.02 0.02 23.75 3.13 1.35 0.01 6.00 0.23 0.00 0.00 15.00 2.71 1.04 0.02 24.00 3.14 1.36 0.01 6.25 0.25 0.00 0.00 15.25 2.73 1.05 0.02 6.50 0.26 0.00 0.00 15.50 2.75 1.07 0.02 6.75 0.27 0.00 0.00 15.75 2.77 1.08 0.02 7.00 0.29 0.00 0.00 16.00 2.79 1.09 0.02 7.25 0.30 0.00 0.00 16.25 2.81 1.11 0.02 7.50 0.32 0.00 0.00 16.50 2.82 1.12 0.01 7.75 0.33 0.00 0.00 16.75 2.84 1.13 0.01 8.00 0.35 0.00 0.00 17.00 2.85 1.14 0.01 8.25 0.37 0.00 0.00 17.25 2.87 1.15 0.01 8.50 0.39 0.00 0.00 17.50 2.88 1.16 0.01 8.75 0.41 0.00 0.00 17.75 2.90 1.17 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 34 Summary for Link PRE: Pre-Development Inflow Area = 0.690 ac, 20.29% Impervious, Inflow Depth > 1.64" for 10-yr event Inflow = 1.07 cfs @ 12.08 hrs, Volume= 0.094 af Primary = 1.07 cfs @ 12.08 hrs, Volume= 0.094 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link PRE: Pre-Development Hydrograph Inflow 1.07 cfs Primary 1.07 cfs Inflow Area=0.690 ac 1 Flow (cfs) 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 35 Hydrograph for Link PRE: Pre-Development Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 9.00 0.01 0.00 0.01 18.00 0.03 0.00 0.03 0.25 0.00 0.00 0.00 9.25 0.01 0.00 0.01 18.25 0.03 0.00 0.03 0.50 0.00 0.00 0.00 9.50 0.01 0.00 0.01 18.50 0.03 0.00 0.03 0.75 0.00 0.00 0.00 9.75 0.01 0.00 0.01 18.75 0.03 0.00 0.03 1.00 0.00 0.00 0.00 10.00 0.01 0.00 0.01 19.00 0.03 0.00 0.03 1.25 0.00 0.00 0.00 10.25 0.02 0.00 0.02 19.25 0.03 0.00 0.03 1.50 0.00 0.00 0.00 10.50 0.02 0.00 0.02 19.50 0.02 0.00 0.02 1.75 0.00 0.00 0.00 10.75 0.03 0.00 0.03 19.75 0.02 0.00 0.02 2.00 0.00 0.00 0.00 11.00 0.03 0.00 0.03 20.00 0.02 0.00 0.02 2.25 0.00 0.00 0.00 11.25 0.05 0.00 0.05 20.25 0.02 0.00 0.02 2.50 0.00 0.00 0.00 11.50 0.07 0.00 0.07 20.50 0.02 0.00 0.02 2.75 0.00 0.00 0.00 11.75 0.21 0.00 0.21 20.75 0.02 0.00 0.02 3.00 0.00 0.00 0.00 12.00 0.84 0.00 0.84 21.00 0.02 0.00 0.02 3.25 0.00 0.00 0.00 12.25 0.82 0.00 0.82 21.25 0.02 0.00 0.02 3.50 0.00 0.00 0.00 12.50 0.51 0.00 0.51 21.50 0.02 0.00 0.02 3.75 0.00 0.00 0.00 12.75 0.24 0.00 0.24 21.75 0.02 0.00 0.02 4.00 0.00 0.00 0.00 13.00 0.14 0.00 0.14 22.00 0.02 0.00 0.02 4.25 0.00 0.00 0.00 13.25 0.11 0.00 0.11 22.25 0.02 0.00 0.02 4.50 0.00 0.00 0.00 13.50 0.09 0.00 0.09 22.50 0.02 0.00 0.02 4.75 0.00 0.00 0.00 13.75 0.08 0.00 0.08 22.75 0.02 0.00 0.02 5.00 0.00 0.00 0.00 14.00 0.07 0.00 0.07 23.00 0.02 0.00 0.02 5.25 0.00 0.00 0.00 14.25 0.06 0.00 0.06 23.25 0.02 0.00 0.02 5.50 0.00 0.00 0.00 14.50 0.06 0.00 0.06 23.50 0.02 0.00 0.02 5.75 0.00 0.00 0.00 14.75 0.05 0.00 0.05 23.75 0.02 0.00 0.02 6.00 0.00 0.00 0.00 15.00 0.05 0.00 0.05 24.00 0.02 0.00 0.02 6.25 0.00 0.00 0.00 15.25 0.05 0.00 0.05 6.50 0.00 0.00 0.00 15.50 0.04 0.00 0.04 6.75 0.00 0.00 0.00 15.75 0.04 0.00 0.04 7.00 0.00 0.00 0.00 16.00 0.04 0.00 0.04 7.25 0.00 0.00 0.00 16.25 0.04 0.00 0.04 7.50 0.00 0.00 0.00 16.50 0.04 0.00 0.04 7.75 0.00 0.00 0.00 16.75 0.04 0.00 0.04 8.00 0.00 0.00 0.00 17.00 0.03 0.00 0.03 8.25 0.01 0.00 0.01 17.25 0.03 0.00 0.03 8.50 0.01 0.00 0.01 17.50 0.03 0.00 0.03 8.75 0.01 0.00 0.01 17.75 0.03 0.00 0.03

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 36 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment AEP: Area to Eastern Property Runoff Area=0.090 ac 44.44% Impervious Runoff Depth>2.59" Flow Length=27' Slope=0.0521 '/' Tc=4.1 min CN=88 Runoff=0.38 cfs 0.019 af Subcatchment AQR: Area to Quaker Road Runoff Area=0.130 ac 76.92% Impervious Runoff Depth>3.17" Flow Length=79' Tc=8.0 min CN=94 Runoff=0.55 cfs 0.034 af Subcatchment ASP: Area to Southern Property Runoff Area=0.170 ac 0.00% Impervious Runoff Depth>1.91" Flow Length=135' Slope=0.0138 '/' Tc=25.4 min CN=80 Runoff=0.28 cfs 0.027 af Subcatchment AWP: Area to Western Property Runoff Area=0.300 ac 0.00% Impervious Runoff Depth>1.91" Flow Length=89' Slope=0.0284 '/' Tc=13.6 min CN=80 Runoff=0.64 cfs 0.048 af Link PRE: Pre-Development Inflow=1.46 cfs 0.129 af Primary=1.46 cfs 0.129 af Total Runoff Area = 0.690 ac Runoff Volume = 0.129 af Average Runoff Depth = 2.24" 79.71% Pervious = 0.550 ac 20.29% Impervious = 0.140 ac

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 37 Summary for Subcatchment AEP: Area to Eastern Property Runoff = 0.38 cfs @ 12.01 hrs, Volume= 0.019 af, Depth> 2.59" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.040 98 Paved parking, HSG D 0.050 80 >75% Grass cover, Good, HSG D 0.090 88 Weighted Average 0.050 55.56% Pervious Area 0.040 44.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.1 27 0.0521 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment AEP: Area to Eastern Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 38 Subcatchment AEP: Area to Eastern Property Hydrograph 0.42 Runoff 0.4 0.38 cfs 0.38 extreme_precip_tables_output (29) 24-hr S1 25-yr 0.36 Rainfall=3.85" Runoff Area=0.090 ac 0.34 Runoff Volume=0.019 af 0.32 Runoff Depth>2.59" 0.3 Flow Length=27' 0.28 Slope=0.0521 '/' 0.26 Tc=4.1 min CN=88 Flow (cfs) 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 39 Hydrograph for Subcatchment AEP: Area to Eastern Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.04 0.00 18.00 3.57 2.34 0.01 0.25 0.01 0.00 0.00 9.25 0.54 0.04 0.00 18.25 3.59 2.35 0.00 0.50 0.02 0.00 0.00 9.50 0.57 0.05 0.00 18.50 3.60 2.36 0.00 0.75 0.03 0.00 0.00 9.75 0.60 0.06 0.00 18.75 3.62 2.38 0.00 1.00 0.04 0.00 0.00 10.00 0.64 0.08 0.00 19.00 3.63 2.39 0.00 1.25 0.05 0.00 0.00 10.25 0.68 0.09 0.01 19.25 3.65 2.40 0.00 1.50 0.06 0.00 0.00 10.50 0.72 0.11 0.01 19.50 3.66 2.41 0.00 1.75 0.07 0.00 0.00 10.75 0.77 0.13 0.01 19.75 3.67 2.43 0.00 2.00 0.08 0.00 0.00 11.00 0.83 0.16 0.01 20.00 3.68 2.44 0.00 2.25 0.09 0.00 0.00 11.25 0.90 0.20 0.01 20.25 3.70 2.45 0.00 2.50 0.10 0.00 0.00 11.50 0.99 0.25 0.02 20.50 3.71 2.46 0.00 2.75 0.11 0.00 0.00 11.75 1.29 0.43 0.08 20.75 3.72 2.47 0.00 3.00 0.12 0.00 0.00 12.00 2.13 1.07 0.37 21.00 3.73 2.48 0.00 3.25 0.13 0.00 0.00 12.25 2.60 1.47 0.12 21.25 3.74 2.49 0.00 3.50 0.14 0.00 0.00 12.50 2.88 1.71 0.08 21.50 3.75 2.50 0.00 3.75 0.16 0.00 0.00 12.75 2.97 1.79 0.03 21.75 3.76 2.51 0.00 4.00 0.17 0.00 0.00 13.00 3.03 1.85 0.02 22.00 3.77 2.52 0.00 4.25 0.18 0.00 0.00 13.25 3.09 1.90 0.02 22.25 3.78 2.53 0.00 4.50 0.19 0.00 0.00 13.50 3.14 1.94 0.01 22.50 3.79 2.54 0.00 4.75 0.21 0.00 0.00 13.75 3.18 1.98 0.01 22.75 3.80 2.55 0.00 5.00 0.22 0.00 0.00 14.00 3.22 2.01 0.01 23.00 3.81 2.56 0.00 5.25 0.23 0.00 0.00 14.25 3.25 2.04 0.01 23.25 3.82 2.56 0.00 5.50 0.25 0.00 0.00 14.50 3.28 2.07 0.01 23.50 3.83 2.57 0.00 5.75 0.26 0.00 0.00 14.75 3.31 2.10 0.01 23.75 3.84 2.58 0.00 6.00 0.28 0.00 0.00 15.00 3.34 2.12 0.01 24.00 3.85 2.59 0.00 6.25 0.29 0.00 0.00 15.25 3.36 2.14 0.01 6.50 0.31 0.00 0.00 15.50 3.39 2.17 0.01 6.75 0.33 0.00 0.00 15.75 3.41 2.19 0.01 7.00 0.34 0.00 0.00 16.00 3.43 2.21 0.01 7.25 0.36 0.01 0.00 16.25 3.45 2.22 0.01 7.50 0.38 0.01 0.00 16.50 3.47 2.24 0.01 7.75 0.40 0.01 0.00 16.75 3.49 2.26 0.01 8.00 0.42 0.01 0.00 17.00 3.51 2.28 0.01 8.25 0.44 0.02 0.00 17.25 3.53 2.29 0.01 8.50 0.47 0.02 0.00 17.50 3.54 2.31 0.01 8.75 0.49 0.03 0.00 17.75 3.56 2.32 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 40 Summary for Subcatchment AQR: Area to Quaker Road Runoff = 0.55 cfs @ 12.06 hrs, Volume= 0.034 af, Depth> 3.17" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.100 98 Paved parking, HSG D 0.030 80 >75% Grass cover, Good, HSG D 0.130 94 Weighted Average 0.030 23.08% Pervious Area 0.100 76.92% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.3 18 0.0408 0.09 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 0.7 37 0.0196 0.93 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" 4.0 24 0.0429 0.10 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 8.0 79 Total Subcatchment AQR: Area to Quaker Road

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 41 Subcatchment AQR: Area to Quaker Road Hydrograph Runoff 0.6 0.55 cfs 0.55 extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" 0.5 Runoff Area=0.130 ac Runoff Volume=0.034 af 0.45 Runoff Depth>3.17" Flow Length=79' 0.4 Tc=8.0 min CN=94 Flow (cfs) 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 42 Hydrograph for Subcatchment AQR: Area to Quaker Road Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.15 0.01 18.00 3.57 2.91 0.01 0.25 0.01 0.00 0.00 9.25 0.54 0.16 0.01 18.25 3.59 2.92 0.01 0.50 0.02 0.00 0.00 9.50 0.57 0.18 0.01 18.50 3.60 2.94 0.01 0.75 0.03 0.00 0.00 9.75 0.60 0.20 0.01 18.75 3.62 2.95 0.01 1.00 0.04 0.00 0.00 10.00 0.64 0.23 0.01 19.00 3.63 2.96 0.01 1.25 0.05 0.00 0.00 10.25 0.68 0.25 0.01 19.25 3.65 2.98 0.01 1.50 0.06 0.00 0.00 10.50 0.72 0.29 0.02 19.50 3.66 2.99 0.01 1.75 0.07 0.00 0.00 10.75 0.77 0.32 0.02 19.75 3.67 3.00 0.01 2.00 0.08 0.00 0.00 11.00 0.83 0.37 0.02 20.00 3.68 3.01 0.01 2.25 0.09 0.00 0.00 11.25 0.90 0.42 0.03 20.25 3.70 3.03 0.01 2.50 0.10 0.00 0.00 11.50 0.99 0.50 0.04 20.50 3.71 3.04 0.01 2.75 0.11 0.00 0.00 11.75 1.29 0.75 0.13 20.75 3.72 3.05 0.01 3.00 0.12 0.00 0.00 12.00 2.13 1.52 0.40 21.00 3.73 3.06 0.01 3.25 0.13 0.00 0.00 12.25 2.60 1.97 0.24 21.25 3.74 3.07 0.01 3.50 0.14 0.00 0.00 12.50 2.88 2.23 0.14 21.50 3.75 3.08 0.01 3.75 0.16 0.00 0.00 12.75 2.97 2.32 0.05 21.75 3.76 3.09 0.01 4.00 0.17 0.00 0.00 13.00 3.03 2.38 0.03 22.00 3.77 3.10 0.01 4.25 0.18 0.00 0.00 13.25 3.09 2.44 0.03 22.25 3.78 3.11 0.01 4.50 0.19 0.01 0.00 13.50 3.14 2.48 0.02 22.50 3.79 3.12 0.01 4.75 0.21 0.01 0.00 13.75 3.18 2.52 0.02 22.75 3.80 3.13 0.01 5.00 0.22 0.01 0.00 14.00 3.22 2.56 0.02 23.00 3.81 3.14 0.00 5.25 0.23 0.01 0.00 14.25 3.25 2.59 0.02 23.25 3.82 3.15 0.00 5.50 0.25 0.02 0.00 14.50 3.28 2.62 0.02 23.50 3.83 3.16 0.00 5.75 0.26 0.02 0.00 14.75 3.31 2.65 0.01 23.75 3.84 3.17 0.00 6.00 0.28 0.03 0.00 15.00 3.34 2.68 0.01 24.00 3.85 3.18 0.00 6.25 0.29 0.03 0.00 15.25 3.36 2.70 0.01 6.50 0.31 0.04 0.00 15.50 3.39 2.73 0.01 6.75 0.33 0.05 0.00 15.75 3.41 2.75 0.01 7.00 0.34 0.05 0.00 16.00 3.43 2.77 0.01 7.25 0.36 0.06 0.00 16.25 3.45 2.79 0.01 7.50 0.38 0.07 0.00 16.50 3.47 2.81 0.01 7.75 0.40 0.08 0.01 16.75 3.49 2.83 0.01 8.00 0.42 0.09 0.01 17.00 3.51 2.84 0.01 8.25 0.44 0.10 0.01 17.25 3.53 2.86 0.01 8.50 0.47 0.12 0.01 17.50 3.54 2.88 0.01 8.75 0.49 0.13 0.01 17.75 3.56 2.89 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 43 Summary for Subcatchment ASP: Area to Southern Property Runoff = 0.28 cfs @ 12.32 hrs, Volume= 0.027 af, Depth> 1.91" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.170 80 >75% Grass cover, Good, HSG D 0.170 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 25.4 135 0.0138 0.09 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment ASP: Area to Southern Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 44 Subcatchment ASP: Area to Southern Property Hydrograph Runoff 0.3 0.28 cfs 0.28 extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" 0.26 Runoff Area=0.170 ac 0.24 Runoff Volume=0.027 af Runoff Depth>1.91" 0.22 Flow Length=135' 0.2 Slope=0.0138 '/' Tc=25.4 min 0.18 CN=80 Flow (cfs) 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 45 Hydrograph for Subcatchment ASP: Area to Southern Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.00 0.00 18.00 3.57 1.70 0.01 0.25 0.01 0.00 0.00 9.25 0.54 0.00 0.00 18.25 3.59 1.71 0.01 0.50 0.02 0.00 0.00 9.50 0.57 0.00 0.00 18.50 3.60 1.72 0.01 0.75 0.03 0.00 0.00 9.75 0.60 0.00 0.00 18.75 3.62 1.73 0.01 1.00 0.04 0.00 0.00 10.00 0.64 0.01 0.00 19.00 3.63 1.74 0.01 1.25 0.05 0.00 0.00 10.25 0.68 0.01 0.00 19.25 3.65 1.75 0.01 1.50 0.06 0.00 0.00 10.50 0.72 0.02 0.00 19.50 3.66 1.76 0.01 1.75 0.07 0.00 0.00 10.75 0.77 0.03 0.00 19.75 3.67 1.77 0.01 2.00 0.08 0.00 0.00 11.00 0.83 0.04 0.01 20.00 3.68 1.78 0.01 2.25 0.09 0.00 0.00 11.25 0.90 0.05 0.01 20.25 3.70 1.79 0.01 2.50 0.10 0.00 0.00 11.50 0.99 0.08 0.01 20.50 3.71 1.80 0.01 2.75 0.11 0.00 0.00 11.75 1.29 0.19 0.03 20.75 3.72 1.81 0.01 3.00 0.12 0.00 0.00 12.00 2.13 0.64 0.08 21.00 3.73 1.82 0.01 3.25 0.13 0.00 0.00 12.25 2.60 0.96 0.26 21.25 3.74 1.83 0.01 3.50 0.14 0.00 0.00 12.50 2.88 1.16 0.22 21.50 3.75 1.84 0.01 3.75 0.16 0.00 0.00 12.75 2.97 1.22 0.14 21.75 3.76 1.85 0.01 4.00 0.17 0.00 0.00 13.00 3.03 1.28 0.07 22.00 3.77 1.86 0.01 4.25 0.18 0.00 0.00 13.25 3.09 1.32 0.04 22.25 3.78 1.86 0.01 4.50 0.19 0.00 0.00 13.50 3.14 1.35 0.03 22.50 3.79 1.87 0.01 4.75 0.21 0.00 0.00 13.75 3.18 1.39 0.03 22.75 3.80 1.88 0.01 5.00 0.22 0.00 0.00 14.00 3.22 1.41 0.02 23.00 3.81 1.89 0.01 5.25 0.23 0.00 0.00 14.25 3.25 1.44 0.02 23.25 3.82 1.90 0.01 5.50 0.25 0.00 0.00 14.50 3.28 1.47 0.02 23.50 3.83 1.90 0.01 5.75 0.26 0.00 0.00 14.75 3.31 1.49 0.02 23.75 3.84 1.91 0.01 6.00 0.28 0.00 0.00 15.00 3.34 1.51 0.02 24.00 3.85 1.92 0.01 6.25 0.29 0.00 0.00 15.25 3.36 1.53 0.01 6.50 0.31 0.00 0.00 15.50 3.39 1.55 0.01 6.75 0.33 0.00 0.00 15.75 3.41 1.57 0.01 7.00 0.34 0.00 0.00 16.00 3.43 1.58 0.01 7.25 0.36 0.00 0.00 16.25 3.45 1.60 0.01 7.50 0.38 0.00 0.00 16.50 3.47 1.61 0.01 7.75 0.40 0.00 0.00 16.75 3.49 1.63 0.01 8.00 0.42 0.00 0.00 17.00 3.51 1.64 0.01 8.25 0.44 0.00 0.00 17.25 3.53 1.66 0.01 8.50 0.47 0.00 0.00 17.50 3.54 1.67 0.01 8.75 0.49 0.00 0.00 17.75 3.56 1.68 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 46 Summary for Subcatchment AWP: Area to Western Property Runoff = 0.64 cfs @ 12.15 hrs, Volume= 0.048 af, Depth> 1.91" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.300 80 >75% Grass cover, Good, HSG D 0.300 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 89 0.0284 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment AWP: Area to Western Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 47 Subcatchment AWP: Area to Western Property Hydrograph Runoff 0.7 0.64 cfs 0.65 extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" 0.6 Runoff Area=0.300 ac 0.55 Runoff Volume=0.048 af Runoff Depth>1.91" 0.5 Flow Length=89' Slope=0.0284 '/' 0.45 Tc=13.6 min CN=80 Flow (cfs) 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 48 Hydrograph for Subcatchment AWP: Area to Western Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.00 0.00 18.00 3.57 1.70 0.02 0.25 0.01 0.00 0.00 9.25 0.54 0.00 0.00 18.25 3.59 1.71 0.01 0.50 0.02 0.00 0.00 9.50 0.57 0.00 0.00 18.50 3.60 1.72 0.01 0.75 0.03 0.00 0.00 9.75 0.60 0.00 0.00 18.75 3.62 1.73 0.01 1.00 0.04 0.00 0.00 10.00 0.64 0.01 0.00 19.00 3.63 1.74 0.01 1.25 0.05 0.00 0.00 10.25 0.68 0.01 0.00 19.25 3.65 1.75 0.01 1.50 0.06 0.00 0.00 10.50 0.72 0.02 0.01 19.50 3.66 1.76 0.01 1.75 0.07 0.00 0.00 10.75 0.77 0.03 0.01 19.75 3.67 1.77 0.01 2.00 0.08 0.00 0.00 11.00 0.83 0.04 0.01 20.00 3.68 1.78 0.01 2.25 0.09 0.00 0.00 11.25 0.90 0.05 0.02 20.25 3.70 1.79 0.01 2.50 0.10 0.00 0.00 11.50 0.99 0.08 0.03 20.50 3.71 1.80 0.01 2.75 0.11 0.00 0.00 11.75 1.29 0.19 0.09 20.75 3.72 1.81 0.01 3.00 0.12 0.00 0.00 12.00 2.13 0.64 0.29 21.00 3.73 1.82 0.01 3.25 0.13 0.00 0.00 12.25 2.60 0.96 0.52 21.25 3.74 1.83 0.01 3.50 0.14 0.00 0.00 12.50 2.88 1.16 0.28 21.50 3.75 1.84 0.01 3.75 0.16 0.00 0.00 12.75 2.97 1.22 0.12 21.75 3.76 1.85 0.01 4.00 0.17 0.00 0.00 13.00 3.03 1.28 0.07 22.00 3.77 1.86 0.01 4.25 0.18 0.00 0.00 13.25 3.09 1.32 0.05 22.25 3.78 1.86 0.01 4.50 0.19 0.00 0.00 13.50 3.14 1.35 0.05 22.50 3.79 1.87 0.01 4.75 0.21 0.00 0.00 13.75 3.18 1.39 0.04 22.75 3.80 1.88 0.01 5.00 0.22 0.00 0.00 14.00 3.22 1.41 0.04 23.00 3.81 1.89 0.01 5.25 0.23 0.00 0.00 14.25 3.25 1.44 0.03 23.25 3.82 1.90 0.01 5.50 0.25 0.00 0.00 14.50 3.28 1.47 0.03 23.50 3.83 1.90 0.01 5.75 0.26 0.00 0.00 14.75 3.31 1.49 0.03 23.75 3.84 1.91 0.01 6.00 0.28 0.00 0.00 15.00 3.34 1.51 0.03 24.00 3.85 1.92 0.01 6.25 0.29 0.00 0.00 15.25 3.36 1.53 0.02 6.50 0.31 0.00 0.00 15.50 3.39 1.55 0.02 6.75 0.33 0.00 0.00 15.75 3.41 1.57 0.02 7.00 0.34 0.00 0.00 16.00 3.43 1.58 0.02 7.25 0.36 0.00 0.00 16.25 3.45 1.60 0.02 7.50 0.38 0.00 0.00 16.50 3.47 1.61 0.02 7.75 0.40 0.00 0.00 16.75 3.49 1.63 0.02 8.00 0.42 0.00 0.00 17.00 3.51 1.64 0.02 8.25 0.44 0.00 0.00 17.25 3.53 1.66 0.02 8.50 0.47 0.00 0.00 17.50 3.54 1.67 0.02 8.75 0.49 0.00 0.00 17.75 3.56 1.68 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 49 Summary for Link PRE: Pre-Development Inflow Area = 0.690 ac, 20.29% Impervious, Inflow Depth > 2.24" for 25-yr event Inflow = 1.46 cfs @ 12.09 hrs, Volume= 0.129 af Primary = 1.46 cfs @ 12.09 hrs, Volume= 0.129 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link PRE: Pre-Development Hydrograph Inflow 1.46 cfs Primary 1.46 cfs Inflow Area=0.690 ac 1 Flow (cfs) 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 50 Hydrograph for Link PRE: Pre-Development Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 9.00 0.01 0.00 0.01 18.00 0.04 0.00 0.04 0.25 0.00 0.00 0.00 9.25 0.01 0.00 0.01 18.25 0.04 0.00 0.04 0.50 0.00 0.00 0.00 9.50 0.02 0.00 0.02 18.50 0.03 0.00 0.03 0.75 0.00 0.00 0.00 9.75 0.02 0.00 0.02 18.75 0.03 0.00 0.03 1.00 0.00 0.00 0.00 10.00 0.02 0.00 0.02 19.00 0.03 0.00 0.03 1.25 0.00 0.00 0.00 10.25 0.03 0.00 0.03 19.25 0.03 0.00 0.03 1.50 0.00 0.00 0.00 10.50 0.03 0.00 0.03 19.50 0.03 0.00 0.03 1.75 0.00 0.00 0.00 10.75 0.04 0.00 0.04 19.75 0.03 0.00 0.03 2.00 0.00 0.00 0.00 11.00 0.05 0.00 0.05 20.00 0.03 0.00 0.03 2.25 0.00 0.00 0.00 11.25 0.07 0.00 0.07 20.25 0.03 0.00 0.03 2.50 0.00 0.00 0.00 11.50 0.10 0.00 0.10 20.50 0.03 0.00 0.03 2.75 0.00 0.00 0.00 11.75 0.32 0.00 0.32 20.75 0.03 0.00 0.03 3.00 0.00 0.00 0.00 12.00 1.15 0.00 1.15 21.00 0.03 0.00 0.03 3.25 0.00 0.00 0.00 12.25 1.14 0.00 1.14 21.25 0.03 0.00 0.03 3.50 0.00 0.00 0.00 12.50 0.72 0.00 0.72 21.50 0.03 0.00 0.03 3.75 0.00 0.00 0.00 12.75 0.33 0.00 0.33 21.75 0.03 0.00 0.03 4.00 0.00 0.00 0.00 13.00 0.19 0.00 0.19 22.00 0.03 0.00 0.03 4.25 0.00 0.00 0.00 13.25 0.14 0.00 0.14 22.25 0.02 0.00 0.02 4.50 0.00 0.00 0.00 13.50 0.12 0.00 0.12 22.50 0.02 0.00 0.02 4.75 0.00 0.00 0.00 13.75 0.10 0.00 0.10 22.75 0.02 0.00 0.02 5.00 0.00 0.00 0.00 14.00 0.09 0.00 0.09 23.00 0.02 0.00 0.02 5.25 0.00 0.00 0.00 14.25 0.08 0.00 0.08 23.25 0.02 0.00 0.02 5.50 0.00 0.00 0.00 14.50 0.07 0.00 0.07 23.50 0.02 0.00 0.02 5.75 0.00 0.00 0.00 14.75 0.07 0.00 0.07 23.75 0.02 0.00 0.02 6.00 0.00 0.00 0.00 15.00 0.06 0.00 0.06 24.00 0.02 0.00 0.02 6.25 0.00 0.00 0.00 15.25 0.06 0.00 0.06 6.50 0.00 0.00 0.00 15.50 0.06 0.00 0.06 6.75 0.00 0.00 0.00 15.75 0.05 0.00 0.05 7.00 0.00 0.00 0.00 16.00 0.05 0.00 0.05 7.25 0.01 0.00 0.01 16.25 0.05 0.00 0.05 7.50 0.01 0.00 0.01 16.50 0.05 0.00 0.05 7.75 0.01 0.00 0.01 16.75 0.04 0.00 0.04 8.00 0.01 0.00 0.01 17.00 0.04 0.00 0.04 8.25 0.01 0.00 0.01 17.25 0.04 0.00 0.04 8.50 0.01 0.00 0.01 17.50 0.04 0.00 0.04 8.75 0.01 0.00 0.01 17.75 0.04 0.00 0.04

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 51 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment AEP: Area to Eastern Property Runoff Area=0.090 ac 44.44% Impervious Runoff Depth>3.91" Flow Length=27' Slope=0.0521 '/' Tc=4.1 min CN=88 Runoff=0.57 cfs 0.029 af Subcatchment AQR: Area to Quaker Road Runoff Area=0.130 ac 76.92% Impervious Runoff Depth>4.55" Flow Length=79' Tc=8.0 min CN=94 Runoff=0.78 cfs 0.049 af Subcatchment ASP: Area to Southern Property Runoff Area=0.170 ac 0.00% Impervious Runoff Depth>3.10" Flow Length=135' Slope=0.0138 '/' Tc=25.4 min CN=80 Runoff=0.46 cfs 0.044 af Subcatchment AWP: Area to Western Property Runoff Area=0.300 ac 0.00% Impervious Runoff Depth>3.10" Flow Length=89' Slope=0.0284 '/' Tc=13.6 min CN=80 Runoff=1.07 cfs 0.078 af Link PRE: Pre-Development Inflow=2.29 cfs 0.200 af Primary=2.29 cfs 0.200 af Total Runoff Area = 0.690 ac Runoff Volume = 0.200 af Average Runoff Depth = 3.48" 79.71% Pervious = 0.550 ac 20.29% Impervious = 0.140 ac

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 52 Summary for Subcatchment AEP: Area to Eastern Property Runoff = 0.57 cfs @ 12.01 hrs, Volume= 0.029 af, Depth> 3.91" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.040 98 Paved parking, HSG D 0.050 80 >75% Grass cover, Good, HSG D 0.090 88 Weighted Average 0.050 55.56% Pervious Area 0.040 44.44% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.1 27 0.0521 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment AEP: Area to Eastern Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 53 Subcatchment AEP: Area to Eastern Property Hydrograph Runoff 0.6 0.57 cfs extreme_precip_tables_output (29) 24-hr S1 100-yr 0.55 Rainfall=5.25" Runoff Area=0.090 ac 0.5 Runoff Volume=0.029 af Runoff Depth>3.91" 0.45 Flow Length=27' Slope=0.0521 '/' 0.4 Tc=4.1 min CN=88 Flow (cfs) 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 54 Hydrograph for Subcatchment AEP: Area to Eastern Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.09 0.00 18.00 4.89 3.57 0.01 0.25 0.01 0.00 0.00 9.25 0.71 0.10 0.01 18.25 4.91 3.59 0.01 0.50 0.02 0.00 0.00 9.50 0.74 0.12 0.01 18.50 4.93 3.60 0.01 0.75 0.04 0.00 0.00 9.75 0.79 0.14 0.01 18.75 4.95 3.62 0.01 1.00 0.05 0.00 0.00 10.00 0.83 0.16 0.01 19.00 4.97 3.64 0.01 1.25 0.06 0.00 0.00 10.25 0.88 0.19 0.01 19.25 4.99 3.65 0.01 1.50 0.07 0.00 0.00 10.50 0.94 0.22 0.01 19.50 5.00 3.67 0.01 1.75 0.09 0.00 0.00 10.75 1.00 0.26 0.01 19.75 5.02 3.69 0.01 2.00 0.10 0.00 0.00 11.00 1.08 0.30 0.02 20.00 5.03 3.70 0.01 2.25 0.11 0.00 0.00 11.25 1.17 0.36 0.02 20.25 5.05 3.72 0.01 2.50 0.13 0.00 0.00 11.50 1.30 0.44 0.03 20.50 5.07 3.73 0.01 2.75 0.14 0.00 0.00 11.75 1.73 0.75 0.13 20.75 5.08 3.75 0.01 3.00 0.16 0.00 0.00 12.00 2.90 1.73 0.56 21.00 5.10 3.76 0.01 3.25 0.17 0.00 0.00 12.25 3.58 2.34 0.18 21.25 5.11 3.77 0.00 3.50 0.19 0.00 0.00 12.50 3.98 2.71 0.12 21.50 5.12 3.79 0.00 3.75 0.20 0.00 0.00 12.75 4.09 2.82 0.04 21.75 5.14 3.80 0.00 4.00 0.22 0.00 0.00 13.00 4.18 2.90 0.03 22.00 5.15 3.81 0.00 4.25 0.23 0.00 0.00 13.25 4.26 2.97 0.02 22.25 5.16 3.82 0.00 4.50 0.25 0.00 0.00 13.50 4.32 3.03 0.02 22.50 5.18 3.84 0.00 4.75 0.27 0.00 0.00 13.75 4.38 3.08 0.02 22.75 5.19 3.85 0.00 5.00 0.28 0.00 0.00 14.00 4.43 3.13 0.02 23.00 5.20 3.86 0.00 5.25 0.30 0.00 0.00 14.25 4.47 3.17 0.01 23.25 5.21 3.87 0.00 5.50 0.32 0.00 0.00 14.50 4.51 3.21 0.01 23.50 5.23 3.88 0.00 5.75 0.34 0.00 0.00 14.75 4.55 3.24 0.01 23.75 5.24 3.90 0.00 6.00 0.36 0.01 0.00 15.00 4.58 3.28 0.01 24.00 5.25 3.91 0.00 6.25 0.38 0.01 0.00 15.25 4.62 3.31 0.01 6.50 0.40 0.01 0.00 15.50 4.65 3.34 0.01 6.75 0.42 0.01 0.00 15.75 4.68 3.36 0.01 7.00 0.45 0.02 0.00 16.00 4.71 3.39 0.01 7.25 0.47 0.02 0.00 16.25 4.73 3.42 0.01 7.50 0.49 0.03 0.00 16.50 4.76 3.44 0.01 7.75 0.52 0.04 0.00 16.75 4.78 3.46 0.01 8.00 0.55 0.05 0.00 17.00 4.81 3.49 0.01 8.25 0.57 0.05 0.00 17.25 4.83 3.51 0.01 8.50 0.60 0.06 0.00 17.50 4.85 3.53 0.01 8.75 0.64 0.08 0.00 17.75 4.87 3.55 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 55 Summary for Subcatchment AQR: Area to Quaker Road Runoff = 0.78 cfs @ 12.06 hrs, Volume= 0.049 af, Depth> 4.55" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.100 98 Paved parking, HSG D 0.030 80 >75% Grass cover, Good, HSG D 0.130 94 Weighted Average 0.030 23.08% Pervious Area 0.100 76.92% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.3 18 0.0408 0.09 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 0.7 37 0.0196 0.93 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" 4.0 24 0.0429 0.10 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 8.0 79 Total Subcatchment AQR: Area to Quaker Road

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 56 Subcatchment AQR: Area to Quaker Road Hydrograph Runoff 0.85 0.78 cfs 0.8 extreme_precip_tables_output (29) 24-hr S1 100-yr 0.75 Rainfall=5.25" Runoff Area=0.130 ac 0.7 Runoff Volume=0.049 af 0.65 Runoff Depth>4.55" 0.6 Flow Length=79' Tc=8.0 min 0.55 CN=94 0.5 Flow (cfs) 0.45 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 57 Hydrograph for Subcatchment AQR: Area to Quaker Road Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.25 0.01 18.00 4.89 4.20 0.01 0.25 0.01 0.00 0.00 9.25 0.71 0.27 0.01 18.25 4.91 4.22 0.01 0.50 0.02 0.00 0.00 9.50 0.74 0.30 0.01 18.50 4.93 4.24 0.01 0.75 0.04 0.00 0.00 9.75 0.79 0.33 0.02 18.75 4.95 4.26 0.01 1.00 0.05 0.00 0.00 10.00 0.83 0.37 0.02 19.00 4.97 4.28 0.01 1.25 0.06 0.00 0.00 10.25 0.88 0.41 0.02 19.25 4.99 4.29 0.01 1.50 0.07 0.00 0.00 10.50 0.94 0.45 0.02 19.50 5.00 4.31 0.01 1.75 0.09 0.00 0.00 10.75 1.00 0.51 0.03 19.75 5.02 4.33 0.01 2.00 0.10 0.00 0.00 11.00 1.08 0.57 0.03 20.00 5.03 4.34 0.01 2.25 0.11 0.00 0.00 11.25 1.17 0.65 0.04 20.25 5.05 4.36 0.01 2.50 0.13 0.00 0.00 11.50 1.30 0.76 0.06 20.50 5.07 4.37 0.01 2.75 0.14 0.00 0.00 11.75 1.73 1.14 0.20 20.75 5.08 4.39 0.01 3.00 0.16 0.00 0.00 12.00 2.90 2.25 0.58 21.00 5.10 4.40 0.01 3.25 0.17 0.00 0.00 12.25 3.58 2.91 0.35 21.25 5.11 4.42 0.01 3.50 0.19 0.00 0.00 12.50 3.98 3.30 0.20 21.50 5.12 4.43 0.01 3.75 0.20 0.01 0.00 12.75 4.09 3.42 0.06 21.75 5.14 4.44 0.01 4.00 0.22 0.01 0.00 13.00 4.18 3.50 0.05 22.00 5.15 4.46 0.01 4.25 0.23 0.01 0.00 13.25 4.26 3.58 0.04 22.25 5.16 4.47 0.01 4.50 0.25 0.02 0.00 13.50 4.32 3.64 0.03 22.50 5.18 4.48 0.01 4.75 0.27 0.02 0.00 13.75 4.38 3.69 0.03 22.75 5.19 4.50 0.01 5.00 0.28 0.03 0.00 14.00 4.43 3.74 0.03 23.00 5.20 4.51 0.01 5.25 0.30 0.04 0.00 14.25 4.47 3.79 0.02 23.25 5.21 4.52 0.01 5.50 0.32 0.04 0.00 14.50 4.51 3.83 0.02 23.50 5.23 4.53 0.01 5.75 0.34 0.05 0.00 14.75 4.55 3.86 0.02 23.75 5.24 4.54 0.01 6.00 0.36 0.06 0.00 15.00 4.58 3.90 0.02 24.00 5.25 4.55 0.01 6.25 0.38 0.07 0.01 15.25 4.62 3.93 0.02 6.50 0.40 0.08 0.01 15.50 4.65 3.96 0.02 6.75 0.42 0.09 0.01 15.75 4.68 3.99 0.02 7.00 0.45 0.11 0.01 16.00 4.71 4.02 0.01 7.25 0.47 0.12 0.01 16.25 4.73 4.05 0.01 7.50 0.49 0.13 0.01 16.50 4.76 4.07 0.01 7.75 0.52 0.15 0.01 16.75 4.78 4.09 0.01 8.00 0.55 0.17 0.01 17.00 4.81 4.12 0.01 8.25 0.57 0.18 0.01 17.25 4.83 4.14 0.01 8.50 0.60 0.20 0.01 17.50 4.85 4.16 0.01 8.75 0.64 0.23 0.01 17.75 4.87 4.18 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 58 Summary for Subcatchment ASP: Area to Southern Property Runoff = 0.46 cfs @ 12.32 hrs, Volume= 0.044 af, Depth> 3.10" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.170 80 >75% Grass cover, Good, HSG D 0.170 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 25.4 135 0.0138 0.09 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment ASP: Area to Southern Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 59 Subcatchment ASP: Area to Southern Property Hydrograph Runoff 0.5 0.48 0.46 cfs 0.46 extreme_precip_tables_output (29) 24-hr S1 100-yr 0.44 Rainfall=5.25" 0.42 Runoff Area=0.170 ac 0.4 Runoff Volume=0.044 af 0.38 Runoff Depth>3.10" 0.36 Flow Length=135' 0.34 Slope=0.0138 '/' 0.32 Tc=25.4 min 0.3 CN=80 Flow (cfs) 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 60 Hydrograph for Subcatchment ASP: Area to Southern Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.01 0.00 18.00 4.89 2.80 0.01 0.25 0.01 0.00 0.00 9.25 0.71 0.02 0.00 18.25 4.91 2.82 0.01 0.50 0.02 0.00 0.00 9.50 0.74 0.02 0.00 18.50 4.93 2.83 0.01 0.75 0.04 0.00 0.00 9.75 0.79 0.03 0.00 18.75 4.95 2.85 0.01 1.00 0.05 0.00 0.00 10.00 0.83 0.04 0.01 19.00 4.97 2.86 0.01 1.25 0.06 0.00 0.00 10.25 0.88 0.05 0.01 19.25 4.99 2.88 0.01 1.50 0.07 0.00 0.00 10.50 0.94 0.07 0.01 19.50 5.00 2.89 0.01 1.75 0.09 0.00 0.00 10.75 1.00 0.08 0.01 19.75 5.02 2.91 0.01 2.00 0.10 0.00 0.00 11.00 1.08 0.11 0.01 20.00 5.03 2.92 0.01 2.25 0.11 0.00 0.00 11.25 1.17 0.14 0.02 20.25 5.05 2.94 0.01 2.50 0.13 0.00 0.00 11.50 1.30 0.19 0.02 20.50 5.07 2.95 0.01 2.75 0.14 0.00 0.00 11.75 1.73 0.40 0.05 20.75 5.08 2.96 0.01 3.00 0.16 0.00 0.00 12.00 2.90 1.17 0.15 21.00 5.10 2.98 0.01 3.25 0.17 0.00 0.00 12.25 3.58 1.70 0.44 21.25 5.11 2.99 0.01 3.50 0.19 0.00 0.00 12.50 3.98 2.02 0.37 21.50 5.12 3.00 0.01 3.75 0.20 0.00 0.00 12.75 4.09 2.12 0.22 21.75 5.14 3.01 0.01 4.00 0.22 0.00 0.00 13.00 4.18 2.19 0.11 22.00 5.15 3.02 0.01 4.25 0.23 0.00 0.00 13.25 4.26 2.26 0.06 22.25 5.16 3.04 0.01 4.50 0.25 0.00 0.00 13.50 4.32 2.31 0.05 22.50 5.18 3.05 0.01 4.75 0.27 0.00 0.00 13.75 4.38 2.36 0.04 22.75 5.19 3.06 0.01 5.00 0.28 0.00 0.00 14.00 4.43 2.40 0.03 23.00 5.20 3.07 0.01 5.25 0.30 0.00 0.00 14.25 4.47 2.44 0.03 23.25 5.21 3.08 0.01 5.50 0.32 0.00 0.00 14.50 4.51 2.47 0.03 23.50 5.23 3.09 0.01 5.75 0.34 0.00 0.00 14.75 4.55 2.50 0.02 23.75 5.24 3.10 0.01 6.00 0.36 0.00 0.00 15.00 4.58 2.53 0.02 24.00 5.25 3.11 0.01 6.25 0.38 0.00 0.00 15.25 4.62 2.56 0.02 6.50 0.40 0.00 0.00 15.50 4.65 2.59 0.02 6.75 0.42 0.00 0.00 15.75 4.68 2.61 0.02 7.00 0.45 0.00 0.00 16.00 4.71 2.64 0.02 7.25 0.47 0.00 0.00 16.25 4.73 2.66 0.02 7.50 0.49 0.00 0.00 16.50 4.76 2.68 0.02 7.75 0.52 0.00 0.00 16.75 4.78 2.71 0.02 8.00 0.55 0.00 0.00 17.00 4.81 2.73 0.01 8.25 0.57 0.00 0.00 17.25 4.83 2.74 0.01 8.50 0.60 0.00 0.00 17.50 4.85 2.76 0.01 8.75 0.64 0.01 0.00 17.75 4.87 2.78 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 61 Summary for Subcatchment AWP: Area to Western Property Runoff = 1.07 cfs @ 12.15 hrs, Volume= 0.078 af, Depth> 3.10" Routed to Link PRE : Pre-Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.300 80 >75% Grass cover, Good, HSG D 0.300 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 13.6 89 0.0284 0.11 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment AWP: Area to Western Property

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 62 Subcatchment AWP: Area to Western Property Hydrograph Runoff 1.07 cfs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" 1 Runoff Area=0.300 ac Runoff Volume=0.078 af Runoff Depth>3.10" Flow Length=89' Slope=0.0284 '/' Tc=13.6 min CN=80 Flow (cfs) 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 63 Hydrograph for Subcatchment AWP: Area to Western Property Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.01 0.00 18.00 4.89 2.80 0.02 0.25 0.01 0.00 0.00 9.25 0.71 0.02 0.01 18.25 4.91 2.82 0.02 0.50 0.02 0.00 0.00 9.50 0.74 0.02 0.01 18.50 4.93 2.83 0.02 0.75 0.04 0.00 0.00 9.75 0.79 0.03 0.01 18.75 4.95 2.85 0.02 1.00 0.05 0.00 0.00 10.00 0.83 0.04 0.01 19.00 4.97 2.86 0.02 1.25 0.06 0.00 0.00 10.25 0.88 0.05 0.01 19.25 4.99 2.88 0.02 1.50 0.07 0.00 0.00 10.50 0.94 0.07 0.02 19.50 5.00 2.89 0.02 1.75 0.09 0.00 0.00 10.75 1.00 0.08 0.02 19.75 5.02 2.91 0.02 2.00 0.10 0.00 0.00 11.00 1.08 0.11 0.03 20.00 5.03 2.92 0.02 2.25 0.11 0.00 0.00 11.25 1.17 0.14 0.04 20.25 5.05 2.94 0.02 2.50 0.13 0.00 0.00 11.50 1.30 0.19 0.05 20.50 5.07 2.95 0.02 2.75 0.14 0.00 0.00 11.75 1.73 0.40 0.19 20.75 5.08 2.96 0.02 3.00 0.16 0.00 0.00 12.00 2.90 1.17 0.52 21.00 5.10 2.98 0.02 3.25 0.17 0.00 0.00 12.25 3.58 1.70 0.85 21.25 5.11 2.99 0.02 3.50 0.19 0.00 0.00 12.50 3.98 2.02 0.46 21.50 5.12 3.00 0.01 3.75 0.20 0.00 0.00 12.75 4.09 2.12 0.19 21.75 5.14 3.01 0.01 4.00 0.22 0.00 0.00 13.00 4.18 2.19 0.10 22.00 5.15 3.02 0.01 4.25 0.23 0.00 0.00 13.25 4.26 2.26 0.08 22.25 5.16 3.04 0.01 4.50 0.25 0.00 0.00 13.50 4.32 2.31 0.07 22.50 5.18 3.05 0.01 4.75 0.27 0.00 0.00 13.75 4.38 2.36 0.06 22.75 5.19 3.06 0.01 5.00 0.28 0.00 0.00 14.00 4.43 2.40 0.05 23.00 5.20 3.07 0.01 5.25 0.30 0.00 0.00 14.25 4.47 2.44 0.05 23.25 5.21 3.08 0.01 5.50 0.32 0.00 0.00 14.50 4.51 2.47 0.04 23.50 5.23 3.09 0.01 5.75 0.34 0.00 0.00 14.75 4.55 2.50 0.04 23.75 5.24 3.10 0.01 6.00 0.36 0.00 0.00 15.00 4.58 2.53 0.04 24.00 5.25 3.11 0.01 6.25 0.38 0.00 0.00 15.25 4.62 2.56 0.04 6.50 0.40 0.00 0.00 15.50 4.65 2.59 0.03 6.75 0.42 0.00 0.00 15.75 4.68 2.61 0.03 7.00 0.45 0.00 0.00 16.00 4.71 2.64 0.03 7.25 0.47 0.00 0.00 16.25 4.73 2.66 0.03 7.50 0.49 0.00 0.00 16.50 4.76 2.68 0.03 7.75 0.52 0.00 0.00 16.75 4.78 2.71 0.03 8.00 0.55 0.00 0.00 17.00 4.81 2.73 0.02 8.25 0.57 0.00 0.00 17.25 4.83 2.74 0.02 8.50 0.60 0.00 0.00 17.50 4.85 2.76 0.02 8.75 0.64 0.01 0.00 17.75 4.87 2.78 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 64 Summary for Link PRE: Pre-Development Inflow Area = 0.690 ac, 20.29% Impervious, Inflow Depth > 3.48" for 100-yr event Inflow = 2.29 cfs @ 12.10 hrs, Volume= 0.200 af Primary = 2.29 cfs @ 12.10 hrs, Volume= 0.200 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link PRE: Pre-Development Hydrograph Inflow 2.29 cfs Primary 2.29 cfs Inflow Area=0.690 ac 2 Flow (cfs) 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 65 Hydrograph for Link PRE: Pre-Development Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 9.00 0.02 0.00 0.02 18.00 0.05 0.00 0.05 0.25 0.00 0.00 0.00 9.25 0.03 0.00 0.03 18.25 0.05 0.00 0.05 0.50 0.00 0.00 0.00 9.50 0.03 0.00 0.03 18.50 0.05 0.00 0.05 0.75 0.00 0.00 0.00 9.75 0.04 0.00 0.04 18.75 0.05 0.00 0.05 1.00 0.00 0.00 0.00 10.00 0.04 0.00 0.04 19.00 0.05 0.00 0.05 1.25 0.00 0.00 0.00 10.25 0.05 0.00 0.05 19.25 0.04 0.00 0.04 1.50 0.00 0.00 0.00 10.50 0.06 0.00 0.06 19.50 0.04 0.00 0.04 1.75 0.00 0.00 0.00 10.75 0.07 0.00 0.07 19.75 0.04 0.00 0.04 2.00 0.00 0.00 0.00 11.00 0.09 0.00 0.09 20.00 0.04 0.00 0.04 2.25 0.00 0.00 0.00 11.25 0.12 0.00 0.12 20.25 0.04 0.00 0.04 2.50 0.00 0.00 0.00 11.50 0.17 0.00 0.17 20.50 0.04 0.00 0.04 2.75 0.00 0.00 0.00 11.75 0.56 0.00 0.56 20.75 0.04 0.00 0.04 3.00 0.00 0.00 0.00 12.00 1.81 0.00 1.81 21.00 0.04 0.00 0.04 3.25 0.00 0.00 0.00 12.25 1.82 0.00 1.82 21.25 0.04 0.00 0.04 3.50 0.00 0.00 0.00 12.50 1.15 0.00 1.15 21.50 0.04 0.00 0.04 3.75 0.00 0.00 0.00 12.75 0.52 0.00 0.52 21.75 0.03 0.00 0.03 4.00 0.00 0.00 0.00 13.00 0.28 0.00 0.28 22.00 0.03 0.00 0.03 4.25 0.00 0.00 0.00 13.25 0.20 0.00 0.20 22.25 0.03 0.00 0.03 4.50 0.00 0.00 0.00 13.50 0.17 0.00 0.17 22.50 0.03 0.00 0.03 4.75 0.00 0.00 0.00 13.75 0.14 0.00 0.14 22.75 0.03 0.00 0.03 5.00 0.00 0.00 0.00 14.00 0.13 0.00 0.13 23.00 0.03 0.00 0.03 5.25 0.00 0.00 0.00 14.25 0.12 0.00 0.12 23.25 0.03 0.00 0.03 5.50 0.00 0.00 0.00 14.50 0.11 0.00 0.11 23.50 0.03 0.00 0.03 5.75 0.00 0.00 0.00 14.75 0.10 0.00 0.10 23.75 0.03 0.00 0.03 6.00 0.01 0.00 0.01 15.00 0.09 0.00 0.09 24.00 0.03 0.00 0.03 6.25 0.01 0.00 0.01 15.25 0.08 0.00 0.08 6.50 0.01 0.00 0.01 15.50 0.08 0.00 0.08 6.75 0.01 0.00 0.01 15.75 0.08 0.00 0.08 7.00 0.01 0.00 0.01 16.00 0.07 0.00 0.07 7.25 0.01 0.00 0.01 16.25 0.07 0.00 0.07 7.50 0.01 0.00 0.01 16.50 0.06 0.00 0.06 7.75 0.01 0.00 0.01 16.75 0.06 0.00 0.06 8.00 0.01 0.00 0.01 17.00 0.06 0.00 0.06 8.25 0.01 0.00 0.01 17.25 0.06 0.00 0.06 8.50 0.02 0.00 0.02 17.50 0.06 0.00 0.06 8.75 0.02 0.00 0.02 17.75 0.05 0.00 0.05

EXIST I. PIPE x ST x Engineering Design Planning 903 WV W Construction Management SSx 904 UP (716) 633-4844 GPINET.COM WATER ST x Greenman - Pedersen, Inc. CHE(PRIVATE 2 METER 90 4950 Genesee Street, Suite 100 90 RCVR 5 RIM 901.57 ST MH PIT W Buffalo, NY, 14225 RIM 903.63 WV W SSx 30"OAK WV VAL ROAD) W INV 897.53-12" ST x SSx S INV 898.45-12" WV S INV 899.12-12" N INV 899.15-12" RCVR E INV 897.48-18" G RIM 903.79 RO N 90 2 GLM W INV 897.53-18" PREPARED FOR RIM 901.54 E INV 899.19-12" CB WV W 902 SSx SPEED ST x PCW Enterprises, LLC AD LIMIT W SIGN S 4185 East Blood Road S WV CB S S SAN MH RIM 902.29 Cowlesville, NY 14037 90 D 903.62 90 4 W INV 894.07-8" ST x 5 14"SPRUCE STOP 2 E INV 893.97-8" SIGN 90 N INV 894.09-8" CB RCVR. AS ST x 2" G 22"OAK RIM 902.30 N INV 899.15 ST x 902 903 30"OAK 5 ST x RCVR. 90 MILE MARKER 903 RIM902.41 20A W INV 898.69-12" ST x 4"CHERRY 0 20' 40' STONE 5301 E INV 898.61-12" 1091 A LK DRIVEWAY 904 SIDEW SCALE IN FEET ST x CB 903 NC. 901 GLM CO 20" 10 " UP 20"x20"x12" S D.I. 2"CHERRY T. C 3 TEES ST x P. 90 D.I. 902 P. 5 ST x ASI 90 12" NG DR X BO M WV W AIL 4"CHERRY IVE AS 4 M SPEED 2" G 90 ST x LIMIT BFV WA W ST MH x WV SIGN W WV ST PEDESTRIAN W Y RIM 905.01 CROSSING 4"CHERRY WATER 2 S INV 898.94-12" W WV W 90 BFV METER PIT W INV 898.26-18" UP E INV 898.19-18" D 905.02 ST x 903 W 906 RCVR 20A 12"x12"x12" TEE 905 904 CB RCVR O UTE O AD RIM903.35 W INV 899.23-12" -5) 4"CHERRY AS R RES) (SP RIM 903.00 ST x NY SR E INV 899.23-12" CP 8" G 12"x8" KEH VARI SUMP 899.40 C REDUCERS 0" P WEST LINE OF THE VILLAGE OF EAST AURORA PLUGGED A T 2 UP QU (WID CB C/E Town of Aurora, NY 14052 EAST LINE OF THE TOWN OF AURORA 359 QUAKER ROAD MEDICAL OFFICES FAR NE ASPHALT 904 3 904 90 4 ST x 90 DRIVEWAY LA GLM C/E RIE S YD DRAIN 2" GA RIM 902.70 3 90 R ST x 359 Quaker Road ALK 4"MAPLE OX EW C/E MA IL B N C. SID M C O UP 904 AS ST x 8" G 3 RCVR 4"MAPLE 90 RIM 903.78 EXIST REBAR C/E PROPOSED 20' WIDE ONLINE, 1.7'W E INV 899.60 CB PRIVATE UTILITY EASEMENT 12" HDPE PL C/E YD DRAIN PL RIM 902.74 20" 8" D 4 72 4"MAPLE 32"MAPLE 90 PL ST. .I.P LF ALK 904 -0.5 DEW CAS . SI NC. 8" H CO ING 6"MAPLE PL % -5) UP SP UP ( 8 DP CP 3 904 PC 90 905 M ' D& HP 904.3± 20" .83 E 5 WATERLINE 149 PL W 9 @ -2. PAINT MARKS AS 04 PL 6"MAPLE 8" G % RCVR.93% 90 ASPHALT 1.0 5% W WV ASPHALT 0.40 -0903.65 4. PARKING RIM 5 LOT 0% PARKING@ LOT UP GLM .5 3.5 D PE INV 900.48 902 90 H 903 GV G EXIST REBAR 8" .0% 903 F ONLINE, 0.1'E 2 -0 'D L - 904 39 %HP 90 .2 200 % -2.6%SD 0.7 2 4.2± 'M -0. N:\2025\WNY-2500056.00 359 QUAKER ROAD SITE PLAN\Design\Engineering\Drainage\WNY-2500056.00_Hydrology.dwg Thursday, 18 December 2025 4:15PM % -RCVR .40 P1L98.45 0 90 PL 9% E @ RIM 904.11 5 -1.0 H DP INV 900.32 WARNING: ALTERATIONS TO THIS 6 8" % 4" INV 903.47 DOCUMENT NOT CONFORMING TO -1.0 LF -1.0 SECTION 7209, SUBDIVISION 2, % 59 BAC K VC STATE EDUCATION LAW, ARE PROHIBITED DS ET . 3 %"P 1 % - 4 YAR -1.0 T FR ON B RCVR 1 50' REVISIONS 32 @ 0 B % RIM 903.51 7 LF .40% .5± DATE INV 900.56 04 % VC -1.6 .5 L. 9 4" INV 903.17 4" P PL B 8" PL904 902 % F. E -1.1 -0.2 F. 90 903 HD .5 903 5 B 40' % PE SID HP 904.1± 904 E 40' YAR 8" HDPE SID INV 900.68 -2.0 D E SET 903 % -0.8 YAR 904 % PL BAC AREA TO QUAKER ROAD DS PL 359 QUAKER ROAD K 0.51± ACRES REVISION 900 ETB 904 903 90 OF B (NOW OR FORMERLY) 5% 2 ASPHALT -2. ACK E PARKING LIN RLY JR. PBI HOLDINGS OF WNY LLC % THE A. D 93 -0.5 B LOT YE NOR RGE P.-3 902 PRO L.-11283, P.-427 CK PE E TBA D T AREA=0.69± ACRE E "H AS , NO. S GE 7192 8 POS RD YA LF 0% AR 22 @ 0.4 RCVR 4 O RE L.- 60' ED S PL RIM 903.24 October 2025 .5% PL 90 901 INV-0 901.13 % WAL 902 DRAWN/DESIGN BY CHECKED BY 3 .5 -1.0 RCVR 5 JS JB .5 % .0% E 0 UP 200 .33' D 1 3 D 0.4 RIM 903.54 - 902 .09' @ .3% 204 904 DPE INV-0901.04 .5 "H 903 AR EB 4'E .5 903 LF 8 3 T R E, 0. M I S EX LIN .42' PL 9 PL ON 2.5 8 902 203 .5 90 903 903 Post Development 903 902 AREA TO OFFSITE 0.19± ACRES PL Drainage Areas 8" HDPE 90 0' D 3 15 INV 900.68 REVIEW SET NOT ISSUED FOR .0 0' M PL 150 CONSTRUCTION PL SCALE: 1" = 20' PL WNY-2500056.00 SET REBAR 902 01 of 01 901

Post Development DA 1 DA 2 DA 3 Drainage Area 1 Drainage Area 2 Drainage Area 3 CB CB CB RCVR 1 RCVR 2 RCVR 3 RCVR 1 RCVR 2 RCVR 3 CB DA 6 SWALE EX RCVR POST ATO Drainage Area 6 SWALE EX RCVR Post Development Area to Offsite CB CB DA 5 RCVR 5 RCVR 4 DA 4 Drainage Area 5 RCVR 5 RCVR 4 Drainage Area 4 Routing Diagram for WNY-2500056.00_HydroCAD Subcat Reach Pond Link Prepared by Greenman-Pedersen, Inc, Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 2 Rainfall Events Listing Event# Event Storm Type Curve Mode Duration B/B Depth AMC Name (hours) (inches) 1 1-yr extreme_precip_tables_output (29) 24-hr S1 1-yr Default 24.00 1 1.88 2 2 10-yr extreme_precip_tables_output (29) 24-hr S1 10-yr Default 24.00 1 3.14 2 3 25-yr extreme_precip_tables_output (29) 24-hr S1 25-yr Default 24.00 1 3.85 2 4 100-yr extreme_precip_tables_output (29) 24-hr S1 100-yr Default 24.00 1 5.25 2

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 3 Area Listing (selected nodes) Area CN Description (acres) (subcatchment-numbers) 0.300 80 >75% Grass cover, Good, HSG D (ATO, DA 3, DA 4, DA 6) 0.390 98 Paved parking, HSG D (DA 1, DA 2, DA 3, DA 4, DA 5, DA 6) 0.690 90 TOTAL AREA

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 4 Soil Listing (selected nodes) Area Soil Subcatchment (acres) Group Numbers 0.000 HSG A 0.000 HSG B 0.000 HSG C 0.690 HSG D ATO, DA 1, DA 2, DA 3, DA 4, DA 5, DA 6 0.000 Other 0.690 TOTAL AREA

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 5 Ground Covers (selected nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground Subcatchment (acres) (acres) (acres) (acres) (acres) (acres) Cover Numbers 0.000 0.000 0.000 0.300 0.000 0.300 >75% Grass cover, Good ATO, DA 3, DA 4, DA 6 0.000 0.000 0.000 0.390 0.000 0.390 Paved parking DA 1, DA 2, DA 3, DA 4, DA 5, DA 6 0.000 0.000 0.000 0.690 0.000 0.690 TOTAL AREA

WNY-2500056.00_HydroCAD Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 6 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n Width Diam/Height Inside-Fill Node Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) Name 1 EX RCVR 899.60 899.23 121.0 0.0031 0.013 0.0 12.0 0.0 EX RCVR 2 RCVR 1 900.56 900.32 59.0 0.0041 0.013 0.0 8.0 0.0 RCVR 1 3 RCVR 2 900.32 899.60 72.0 0.0100 0.013 0.0 8.0 0.0 RCVR 2 4 RCVR 3 900.48 900.32 39.0 0.0041 0.013 0.0 8.0 0.0 RCVR 3 5 RCVR 4 901.13 901.04 22.0 0.0041 0.013 0.0 8.0 0.0 RCVR 4 6 RCVR 5 901.04 900.68 89.0 0.0040 0.013 0.0 8.0 0.0 RCVR 5 7 SWALE 900.68 900.55 32.0 0.0041 0.013 0.0 8.0 0.0 SWALE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 7 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment ATO: Area to Offsite Runoff Area=0.190 ac 0.00% Impervious Runoff Depth>0.49" Flow Length=60' Slope=0.0050 '/' Tc=30.0 min CN=80 Runoff=0.06 cfs 0.008 af Subcatchment DA 1: Drainage Area 1 Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>1.66" Flow Length=80' Slope=0.0100 '/' Tc=1.6 min CN=98 Runoff=0.17 cfs 0.008 af Subcatchment DA 2: Drainage Area 2 Runoff Area=0.010 ac 100.00% Impervious Runoff Depth>1.66" Flow Length=35' Slope=0.0100 '/' Tc=0.8 min CN=98 Runoff=0.03 cfs 0.001 af Subcatchment DA 3: Drainage Area 3 Runoff Area=0.150 ac 93.33% Impervious Runoff Depth>1.55" Flow Length=75' Slope=0.0100 '/' Tc=7.2 min CN=97 Runoff=0.33 cfs 0.019 af Subcatchment DA 4: Drainage Area 4 Runoff Area=0.080 ac 87.50% Impervious Runoff Depth>1.46" Flow Length=20' Slope=0.0100 '/' Tc=6.3 min CN=96 Runoff=0.17 cfs 0.010 af Subcatchment DA 5: Drainage Area 5 Runoff Area=0.050 ac 100.00% Impervious Runoff Depth>1.66" Flow Length=60' Slope=0.0050 '/' Tc=1.7 min CN=98 Runoff=0.14 cfs 0.007 af Subcatchment DA 6: Drainage Area 6 Runoff Area=0.150 ac 40.00% Impervious Runoff Depth>0.81" Flow Length=40' Slope=0.0045 '/' Tc=15.0 min CN=87 Runoff=0.13 cfs 0.010 af Pond EX RCVR: EX RCVR Peak Elev=900.03' Inflow=0.45 cfs 0.045 af 12.0" Round Culvert n=0.013 L=121.0' S=0.0031 '/' Outflow=0.45 cfs 0.045 af Pond RCVR 1: RCVR 1 Peak Elev=900.87' Inflow=0.17 cfs 0.024 af 8.0" Round Culvert n=0.013 L=59.0' S=0.0041 '/' Outflow=0.17 cfs 0.024 af Pond RCVR 2: RCVR 2 Peak Elev=900.73' Inflow=0.45 cfs 0.045 af 8.0" Round Culvert n=0.013 L=72.0' S=0.0100 '/' Outflow=0.45 cfs 0.045 af Pond RCVR 3: RCVR 3 Peak Elev=900.92' Inflow=0.33 cfs 0.019 af 8.0" Round Culvert n=0.013 L=39.0' S=0.0041 '/' Outflow=0.33 cfs 0.019 af

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 8 Pond RCVR 4: RCVR 4 Peak Elev=901.49' Inflow=0.17 cfs 0.010 af 8.0" Round Culvert n=0.013 L=22.0' S=0.0041 '/' Outflow=0.17 cfs 0.010 af Pond RCVR 5: RCVR 5 Peak Elev=901.41' Inflow=0.28 cfs 0.017 af 8.0" Round Culvert n=0.013 L=89.0' S=0.0040 '/' Outflow=0.28 cfs 0.017 af Pond SWALE: SWALE Peak Elev=900.91' Storage=624 cf Inflow=0.34 cfs 0.027 af 8.0" Round Culvert n=0.013 L=32.0' S=0.0041 '/' Outflow=0.09 cfs 0.016 af Link POST: Post Development Inflow=0.45 cfs 0.053 af Primary=0.45 cfs 0.053 af Total Runoff Area = 0.690 ac Runoff Volume = 0.063 af Average Runoff Depth = 1.10" 43.48% Pervious = 0.300 ac 56.52% Impervious = 0.390 ac

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 9 Summary for Subcatchment ATO: Area to Offsite Runoff = 0.06 cfs @ 12.42 hrs, Volume= 0.008 af, Depth> 0.49" Routed to Link POST : Post Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.190 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 30.0 60 0.0050 0.03 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 2.20" Subcatchment ATO: Area to Offsite

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 10 Subcatchment ATO: Area to Offsite Hydrograph Runoff 0.065 0.06 cfs extreme_precip_tables_output (29) 24-hr S1 1-yr 0.06 Rainfall=1.88" Runoff Area=0.190 ac 0.055 Runoff Volume=0.008 af 0.05 Runoff Depth>0.49" Flow Length=60' 0.045 Slope=0.0050 '/' Tc=30.0 min 0.04 CN=80 Flow (cfs) 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 11 Hydrograph for Subcatchment ATO: Area to Offsite Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.00 0.00 18.00 1.73 0.41 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.00 0.00 18.25 1.74 0.41 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.00 0.00 18.50 1.75 0.41 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.00 0.00 18.75 1.75 0.42 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.00 0.00 19.00 1.76 0.42 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.00 0.00 19.25 1.77 0.43 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.00 0.00 19.50 1.78 0.43 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.00 0.00 19.75 1.78 0.44 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.00 0.00 20.00 1.79 0.44 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.00 0.00 20.25 1.80 0.44 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.00 0.00 20.50 1.80 0.45 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.01 0.00 20.75 1.81 0.45 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.10 0.01 21.00 1.81 0.45 0.00 3.25 0.07 0.00 0.00 12.25 1.26 0.18 0.05 21.25 1.82 0.46 0.00 3.50 0.08 0.00 0.00 12.50 1.37 0.22 0.06 21.50 1.83 0.46 0.00 3.75 0.08 0.00 0.00 12.75 1.41 0.24 0.04 21.75 1.83 0.46 0.00 4.00 0.09 0.00 0.00 13.00 1.45 0.26 0.02 22.00 1.84 0.47 0.00 4.25 0.10 0.00 0.00 13.25 1.48 0.27 0.02 22.25 1.84 0.47 0.00 4.50 0.10 0.00 0.00 13.50 1.50 0.29 0.01 22.50 1.85 0.47 0.00 4.75 0.11 0.00 0.00 13.75 1.52 0.30 0.01 22.75 1.85 0.48 0.00 5.00 0.12 0.00 0.00 14.00 1.54 0.31 0.01 23.00 1.86 0.48 0.00 5.25 0.13 0.00 0.00 14.25 1.56 0.32 0.01 23.25 1.86 0.48 0.00 5.50 0.13 0.00 0.00 14.50 1.58 0.32 0.01 23.50 1.87 0.49 0.00 5.75 0.14 0.00 0.00 14.75 1.59 0.33 0.01 23.75 1.88 0.49 0.00 6.00 0.15 0.00 0.00 15.00 1.61 0.34 0.01 24.00 1.88 0.49 0.00 6.25 0.16 0.00 0.00 15.25 1.62 0.35 0.01 6.50 0.17 0.00 0.00 15.50 1.63 0.35 0.01 6.75 0.18 0.00 0.00 15.75 1.64 0.36 0.01 7.00 0.19 0.00 0.00 16.00 1.66 0.37 0.00 7.25 0.19 0.00 0.00 16.25 1.67 0.37 0.00 7.50 0.20 0.00 0.00 16.50 1.68 0.38 0.00 7.75 0.22 0.00 0.00 16.75 1.69 0.38 0.00 8.00 0.23 0.00 0.00 17.00 1.70 0.39 0.00 8.25 0.24 0.00 0.00 17.25 1.71 0.39 0.00 8.50 0.25 0.00 0.00 17.50 1.71 0.40 0.00 8.75 0.26 0.00 0.00 17.75 1.72 0.40 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment DA 1: Drainage Area 1 Runoff = 0.17 cfs @ 11.98 hrs, Volume= 0.008 af, Depth> 1.66" Routed to Pond RCVR 1 : RCVR 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.060 98 Paved parking, HSG D 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.6 80 0.0100 0.83 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 1: Drainage Area 1

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 13 Subcatchment DA 1: Drainage Area 1 Hydrograph 0.19 Runoff 0.18 0.17 cfs extreme_precip_tables_output (29) 24-hr S1 1-yr 0.17 Rainfall=1.88" 0.16 Runoff Area=0.060 ac 0.15 Runoff Volume=0.008 af 0.14 Runoff Depth>1.66" Flow Length=80' 0.13 Slope=0.0100 '/' 0.12 Tc=1.6 min 0.11 CN=98 Flow (cfs) 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 14 Hydrograph for Subcatchment DA 1: Drainage Area 1 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.13 0.00 18.00 1.73 1.51 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.14 0.00 18.25 1.74 1.52 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.15 0.00 18.50 1.75 1.52 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.16 0.00 18.75 1.75 1.53 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.18 0.00 19.00 1.76 1.54 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.20 0.00 19.25 1.77 1.55 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.21 0.00 19.50 1.78 1.55 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.24 0.01 19.75 1.78 1.56 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.26 0.01 20.00 1.79 1.57 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.29 0.01 20.25 1.80 1.57 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.34 0.01 20.50 1.80 1.58 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.45 0.03 20.75 1.81 1.59 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.84 0.16 21.00 1.81 1.59 0.00 3.25 0.07 0.00 0.00 12.25 1.26 1.04 0.03 21.25 1.82 1.60 0.00 3.50 0.08 0.01 0.00 12.50 1.37 1.15 0.02 21.50 1.83 1.60 0.00 3.75 0.08 0.01 0.00 12.75 1.41 1.20 0.01 21.75 1.83 1.61 0.00 4.00 0.09 0.01 0.00 13.00 1.45 1.23 0.01 22.00 1.84 1.61 0.00 4.25 0.10 0.01 0.00 13.25 1.48 1.26 0.01 22.25 1.84 1.62 0.00 4.50 0.10 0.02 0.00 13.50 1.50 1.28 0.01 22.50 1.85 1.63 0.00 4.75 0.11 0.02 0.00 13.75 1.52 1.30 0.00 22.75 1.85 1.63 0.00 5.00 0.12 0.02 0.00 14.00 1.54 1.32 0.00 23.00 1.86 1.64 0.00 5.25 0.13 0.03 0.00 14.25 1.56 1.34 0.00 23.25 1.86 1.64 0.00 5.50 0.13 0.03 0.00 14.50 1.58 1.36 0.00 23.50 1.87 1.65 0.00 5.75 0.14 0.03 0.00 14.75 1.59 1.37 0.00 23.75 1.88 1.65 0.00 6.00 0.15 0.04 0.00 15.00 1.61 1.38 0.00 24.00 1.88 1.66 0.00 6.25 0.16 0.04 0.00 15.25 1.62 1.40 0.00 6.50 0.17 0.05 0.00 15.50 1.63 1.41 0.00 6.75 0.18 0.05 0.00 15.75 1.64 1.42 0.00 7.00 0.19 0.06 0.00 16.00 1.66 1.43 0.00 7.25 0.19 0.07 0.00 16.25 1.67 1.44 0.00 7.50 0.20 0.07 0.00 16.50 1.68 1.45 0.00 7.75 0.22 0.08 0.00 16.75 1.69 1.46 0.00 8.00 0.23 0.09 0.00 17.00 1.70 1.47 0.00 8.25 0.24 0.10 0.00 17.25 1.71 1.48 0.00 8.50 0.25 0.11 0.00 17.50 1.71 1.49 0.00 8.75 0.26 0.12 0.00 17.75 1.72 1.50 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment DA 2: Drainage Area 2 Runoff = 0.03 cfs @ 11.96 hrs, Volume= 0.001 af, Depth> 1.66" Routed to Pond RCVR 2 : RCVR 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.010 98 Paved parking, HSG D 0.010 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.8 35 0.0100 0.70 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 2: Drainage Area 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 16 Subcatchment DA 2: Drainage Area 2 Hydrograph 0.032 Runoff 0.03 cfs 0.03 extreme_precip_tables_output (29) 24-hr S1 1-yr 0.028 Rainfall=1.88" Runoff Area=0.010 ac 0.026 Runoff Volume=0.001 af 0.024 Runoff Depth>1.66" Flow Length=35' 0.022 Slope=0.0100 '/' 0.02 Tc=0.8 min CN=98 Flow (cfs) 0.018 0.016 0.014 0.012 0.01 0.008 0.006 0.004 0.002 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 17 Hydrograph for Subcatchment DA 2: Drainage Area 2 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.13 0.00 18.00 1.73 1.51 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.14 0.00 18.25 1.74 1.52 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.15 0.00 18.50 1.75 1.52 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.16 0.00 18.75 1.75 1.53 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.18 0.00 19.00 1.76 1.54 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.20 0.00 19.25 1.77 1.55 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.21 0.00 19.50 1.78 1.55 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.24 0.00 19.75 1.78 1.56 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.26 0.00 20.00 1.79 1.57 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.29 0.00 20.25 1.80 1.57 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.34 0.00 20.50 1.80 1.58 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.45 0.01 20.75 1.81 1.59 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.84 0.02 21.00 1.81 1.59 0.00 3.25 0.07 0.00 0.00 12.25 1.26 1.04 0.01 21.25 1.82 1.60 0.00 3.50 0.08 0.01 0.00 12.50 1.37 1.15 0.00 21.50 1.83 1.60 0.00 3.75 0.08 0.01 0.00 12.75 1.41 1.20 0.00 21.75 1.83 1.61 0.00 4.00 0.09 0.01 0.00 13.00 1.45 1.23 0.00 22.00 1.84 1.61 0.00 4.25 0.10 0.01 0.00 13.25 1.48 1.26 0.00 22.25 1.84 1.62 0.00 4.50 0.10 0.02 0.00 13.50 1.50 1.28 0.00 22.50 1.85 1.63 0.00 4.75 0.11 0.02 0.00 13.75 1.52 1.30 0.00 22.75 1.85 1.63 0.00 5.00 0.12 0.02 0.00 14.00 1.54 1.32 0.00 23.00 1.86 1.64 0.00 5.25 0.13 0.03 0.00 14.25 1.56 1.34 0.00 23.25 1.86 1.64 0.00 5.50 0.13 0.03 0.00 14.50 1.58 1.36 0.00 23.50 1.87 1.65 0.00 5.75 0.14 0.03 0.00 14.75 1.59 1.37 0.00 23.75 1.88 1.65 0.00 6.00 0.15 0.04 0.00 15.00 1.61 1.38 0.00 24.00 1.88 1.66 0.00 6.25 0.16 0.04 0.00 15.25 1.62 1.40 0.00 6.50 0.17 0.05 0.00 15.50 1.63 1.41 0.00 6.75 0.18 0.05 0.00 15.75 1.64 1.42 0.00 7.00 0.19 0.06 0.00 16.00 1.66 1.43 0.00 7.25 0.19 0.07 0.00 16.25 1.67 1.44 0.00 7.50 0.20 0.07 0.00 16.50 1.68 1.45 0.00 7.75 0.22 0.08 0.00 16.75 1.69 1.46 0.00 8.00 0.23 0.09 0.00 17.00 1.70 1.47 0.00 8.25 0.24 0.10 0.00 17.25 1.71 1.48 0.00 8.50 0.25 0.11 0.00 17.50 1.71 1.49 0.00 8.75 0.26 0.12 0.00 17.75 1.72 1.50 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 18 Summary for Subcatchment DA 3: Drainage Area 3 Runoff = 0.33 cfs @ 12.05 hrs, Volume= 0.019 af, Depth> 1.55" Routed to Pond RCVR 3 : RCVR 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.140 98 Paved parking, HSG D 0.010 80 >75% Grass cover, Good, HSG D 0.150 97 Weighted Average 0.010 6.67% Pervious Area 0.140 93.33% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 19 0.0100 0.05 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 1.2 56 0.0100 0.77 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" 7.2 75 Total Subcatchment DA 3: Drainage Area 3

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 19 Subcatchment DA 3: Drainage Area 3 Hydrograph 0.36 Runoff 0.33 cfs 0.34 extreme_precip_tables_output (29) 24-hr S1 1-yr 0.32 Rainfall=1.88" 0.3 Runoff Area=0.150 ac Runoff Volume=0.019 af 0.28 Runoff Depth>1.55" 0.26 Flow Length=75' 0.24 Slope=0.0100 '/' Tc=7.2 min 0.22 CN=97 Flow (cfs) 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 20 Hydrograph for Subcatchment DA 3: Drainage Area 3 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.09 0.01 18.00 1.73 1.41 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.10 0.01 18.25 1.74 1.42 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.11 0.01 18.50 1.75 1.42 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.12 0.01 18.75 1.75 1.43 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.13 0.01 19.00 1.76 1.44 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.15 0.01 19.25 1.77 1.45 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.16 0.01 19.50 1.78 1.45 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.18 0.01 19.75 1.78 1.46 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.21 0.01 20.00 1.79 1.47 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.23 0.02 20.25 1.80 1.47 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.27 0.02 20.50 1.80 1.48 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.38 0.06 20.75 1.81 1.48 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.75 0.25 21.00 1.81 1.49 0.00 3.25 0.07 0.00 0.00 12.25 1.26 0.95 0.12 21.25 1.82 1.50 0.00 3.50 0.08 0.00 0.00 12.50 1.37 1.06 0.06 21.50 1.83 1.50 0.00 3.75 0.08 0.00 0.00 12.75 1.41 1.10 0.03 21.75 1.83 1.51 0.00 4.00 0.09 0.00 0.00 13.00 1.45 1.13 0.02 22.00 1.84 1.51 0.00 4.25 0.10 0.00 0.00 13.25 1.48 1.16 0.02 22.25 1.84 1.52 0.00 4.50 0.10 0.01 0.00 13.50 1.50 1.18 0.01 22.50 1.85 1.52 0.00 4.75 0.11 0.01 0.00 13.75 1.52 1.21 0.01 22.75 1.85 1.53 0.00 5.00 0.12 0.01 0.00 14.00 1.54 1.22 0.01 23.00 1.86 1.53 0.00 5.25 0.13 0.01 0.00 14.25 1.56 1.24 0.01 23.25 1.86 1.54 0.00 5.50 0.13 0.01 0.00 14.50 1.58 1.26 0.01 23.50 1.87 1.54 0.00 5.75 0.14 0.02 0.00 14.75 1.59 1.27 0.01 23.75 1.88 1.55 0.00 6.00 0.15 0.02 0.00 15.00 1.61 1.29 0.01 24.00 1.88 1.55 0.00 6.25 0.16 0.02 0.00 15.25 1.62 1.30 0.01 6.50 0.17 0.03 0.00 15.50 1.63 1.31 0.01 6.75 0.18 0.03 0.00 15.75 1.64 1.32 0.01 7.00 0.19 0.04 0.00 16.00 1.66 1.33 0.01 7.25 0.19 0.04 0.00 16.25 1.67 1.34 0.01 7.50 0.20 0.05 0.00 16.50 1.68 1.35 0.01 7.75 0.22 0.05 0.00 16.75 1.69 1.36 0.01 8.00 0.23 0.06 0.00 17.00 1.70 1.37 0.01 8.25 0.24 0.06 0.00 17.25 1.71 1.38 0.01 8.50 0.25 0.07 0.00 17.50 1.71 1.39 0.01 8.75 0.26 0.08 0.00 17.75 1.72 1.40 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 21 Summary for Subcatchment DA 4: Drainage Area 4 Runoff = 0.17 cfs @ 12.04 hrs, Volume= 0.010 af, Depth> 1.46" Routed to Pond RCVR 4 : RCVR 4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.070 98 Paved parking, HSG D 0.010 80 >75% Grass cover, Good, HSG D 0.080 96 Weighted Average 0.010 12.50% Pervious Area 0.070 87.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 20 0.0100 0.05 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment DA 4: Drainage Area 4

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 22 Subcatchment DA 4: Drainage Area 4 Hydrograph 0.19 Runoff 0.17 cfs 0.18 extreme_precip_tables_output (29) 24-hr S1 1-yr 0.17 Rainfall=1.88" 0.16 Runoff Area=0.080 ac 0.15 Runoff Volume=0.010 af 0.14 Runoff Depth>1.46" Flow Length=20' 0.13 Slope=0.0100 '/' 0.12 Tc=6.3 min 0.11 CN=96 Flow (cfs) 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 23 Hydrograph for Subcatchment DA 4: Drainage Area 4 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.06 0.00 18.00 1.73 1.32 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.07 0.00 18.25 1.74 1.32 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.08 0.00 18.50 1.75 1.33 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.09 0.00 18.75 1.75 1.34 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.10 0.00 19.00 1.76 1.34 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.11 0.00 19.25 1.77 1.35 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.13 0.00 19.50 1.78 1.36 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.14 0.01 19.75 1.78 1.36 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.16 0.01 20.00 1.79 1.37 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.19 0.01 20.25 1.80 1.38 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.22 0.01 20.50 1.80 1.38 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.32 0.03 20.75 1.81 1.39 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.68 0.15 21.00 1.81 1.40 0.00 3.25 0.07 0.00 0.00 12.25 1.26 0.87 0.06 21.25 1.82 1.40 0.00 3.50 0.08 0.00 0.00 12.50 1.37 0.97 0.03 21.50 1.83 1.41 0.00 3.75 0.08 0.00 0.00 12.75 1.41 1.01 0.01 21.75 1.83 1.41 0.00 4.00 0.09 0.00 0.00 13.00 1.45 1.05 0.01 22.00 1.84 1.42 0.00 4.25 0.10 0.00 0.00 13.25 1.48 1.07 0.01 22.25 1.84 1.42 0.00 4.50 0.10 0.00 0.00 13.50 1.50 1.10 0.01 22.50 1.85 1.43 0.00 4.75 0.11 0.00 0.00 13.75 1.52 1.12 0.01 22.75 1.85 1.43 0.00 5.00 0.12 0.00 0.00 14.00 1.54 1.13 0.01 23.00 1.86 1.44 0.00 5.25 0.13 0.00 0.00 14.25 1.56 1.15 0.01 23.25 1.86 1.44 0.00 5.50 0.13 0.01 0.00 14.50 1.58 1.17 0.00 23.50 1.87 1.45 0.00 5.75 0.14 0.01 0.00 14.75 1.59 1.18 0.00 23.75 1.88 1.45 0.00 6.00 0.15 0.01 0.00 15.00 1.61 1.20 0.00 24.00 1.88 1.46 0.00 6.25 0.16 0.01 0.00 15.25 1.62 1.21 0.00 6.50 0.17 0.01 0.00 15.50 1.63 1.22 0.00 6.75 0.18 0.02 0.00 15.75 1.64 1.23 0.00 7.00 0.19 0.02 0.00 16.00 1.66 1.24 0.00 7.25 0.19 0.02 0.00 16.25 1.67 1.25 0.00 7.50 0.20 0.03 0.00 16.50 1.68 1.26 0.00 7.75 0.22 0.03 0.00 16.75 1.69 1.27 0.00 8.00 0.23 0.04 0.00 17.00 1.70 1.28 0.00 8.25 0.24 0.04 0.00 17.25 1.71 1.29 0.00 8.50 0.25 0.05 0.00 17.50 1.71 1.30 0.00 8.75 0.26 0.05 0.00 17.75 1.72 1.31 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 24 Summary for Subcatchment DA 5: Drainage Area 5 Runoff = 0.14 cfs @ 11.98 hrs, Volume= 0.007 af, Depth> 1.66" Routed to Pond RCVR 5 : RCVR 5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.050 98 Paved parking, HSG D 0.050 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.7 60 0.0050 0.59 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 5: Drainage Area 5

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 25 Subcatchment DA 5: Drainage Area 5 Hydrograph 0.16 Runoff 0.15 0.14 cfs extreme_precip_tables_output (29) 24-hr S1 1-yr 0.14 Rainfall=1.88" 0.13 Runoff Area=0.050 ac Runoff Volume=0.007 af 0.12 Runoff Depth>1.66" 0.11 Flow Length=60' Slope=0.0050 '/' 0.1 Tc=1.7 min CN=98 Flow (cfs) 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 26 Hydrograph for Subcatchment DA 5: Drainage Area 5 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.13 0.00 18.00 1.73 1.51 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.14 0.00 18.25 1.74 1.52 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.15 0.00 18.50 1.75 1.52 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.16 0.00 18.75 1.75 1.53 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.18 0.00 19.00 1.76 1.54 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.20 0.00 19.25 1.77 1.55 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.21 0.00 19.50 1.78 1.55 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.24 0.00 19.75 1.78 1.56 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.26 0.01 20.00 1.79 1.57 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.29 0.01 20.25 1.80 1.57 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.34 0.01 20.50 1.80 1.58 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.45 0.03 20.75 1.81 1.59 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.84 0.14 21.00 1.81 1.59 0.00 3.25 0.07 0.00 0.00 12.25 1.26 1.04 0.03 21.25 1.82 1.60 0.00 3.50 0.08 0.01 0.00 12.50 1.37 1.15 0.02 21.50 1.83 1.60 0.00 3.75 0.08 0.01 0.00 12.75 1.41 1.20 0.01 21.75 1.83 1.61 0.00 4.00 0.09 0.01 0.00 13.00 1.45 1.23 0.01 22.00 1.84 1.61 0.00 4.25 0.10 0.01 0.00 13.25 1.48 1.26 0.01 22.25 1.84 1.62 0.00 4.50 0.10 0.02 0.00 13.50 1.50 1.28 0.00 22.50 1.85 1.63 0.00 4.75 0.11 0.02 0.00 13.75 1.52 1.30 0.00 22.75 1.85 1.63 0.00 5.00 0.12 0.02 0.00 14.00 1.54 1.32 0.00 23.00 1.86 1.64 0.00 5.25 0.13 0.03 0.00 14.25 1.56 1.34 0.00 23.25 1.86 1.64 0.00 5.50 0.13 0.03 0.00 14.50 1.58 1.36 0.00 23.50 1.87 1.65 0.00 5.75 0.14 0.03 0.00 14.75 1.59 1.37 0.00 23.75 1.88 1.65 0.00 6.00 0.15 0.04 0.00 15.00 1.61 1.38 0.00 24.00 1.88 1.66 0.00 6.25 0.16 0.04 0.00 15.25 1.62 1.40 0.00 6.50 0.17 0.05 0.00 15.50 1.63 1.41 0.00 6.75 0.18 0.05 0.00 15.75 1.64 1.42 0.00 7.00 0.19 0.06 0.00 16.00 1.66 1.43 0.00 7.25 0.19 0.07 0.00 16.25 1.67 1.44 0.00 7.50 0.20 0.07 0.00 16.50 1.68 1.45 0.00 7.75 0.22 0.08 0.00 16.75 1.69 1.46 0.00 8.00 0.23 0.09 0.00 17.00 1.70 1.47 0.00 8.25 0.24 0.10 0.00 17.25 1.71 1.48 0.00 8.50 0.25 0.11 0.00 17.50 1.71 1.49 0.00 8.75 0.26 0.12 0.00 17.75 1.72 1.50 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 27 Summary for Subcatchment DA 6: Drainage Area 6 Runoff = 0.13 cfs @ 12.17 hrs, Volume= 0.010 af, Depth> 0.81" Routed to Pond SWALE : SWALE Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Area (ac) CN Description 0.060 98 Paved parking, HSG D 0.090 80 >75% Grass cover, Good, HSG D 0.150 87 Weighted Average 0.090 60.00% Pervious Area 0.060 40.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 40 0.0045 0.04 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment DA 6: Drainage Area 6

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 28 Subcatchment DA 6: Drainage Area 6 Hydrograph Runoff 0.14 0.13 cfs 0.13 extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" 0.12 Runoff Area=0.150 ac 0.11 Runoff Volume=0.010 af Runoff Depth>0.81" 0.1 Flow Length=40' Slope=0.0045 '/' 0.09 Tc=15.0 min CN=87 Flow (cfs) 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 29 Hydrograph for Subcatchment DA 6: Drainage Area 6 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.28 0.00 0.00 18.00 1.73 0.70 0.00 0.25 0.00 0.00 0.00 9.25 0.29 0.00 0.00 18.25 1.74 0.71 0.00 0.50 0.01 0.00 0.00 9.50 0.31 0.00 0.00 18.50 1.75 0.71 0.00 0.75 0.02 0.00 0.00 9.75 0.32 0.00 0.00 18.75 1.75 0.72 0.00 1.00 0.02 0.00 0.00 10.00 0.34 0.00 0.00 19.00 1.76 0.72 0.00 1.25 0.03 0.00 0.00 10.25 0.36 0.00 0.00 19.25 1.77 0.73 0.00 1.50 0.03 0.00 0.00 10.50 0.38 0.00 0.00 19.50 1.78 0.73 0.00 1.75 0.04 0.00 0.00 10.75 0.41 0.01 0.00 19.75 1.78 0.74 0.00 2.00 0.04 0.00 0.00 11.00 0.44 0.01 0.00 20.00 1.79 0.74 0.00 2.25 0.05 0.00 0.00 11.25 0.47 0.02 0.00 20.25 1.80 0.75 0.00 2.50 0.05 0.00 0.00 11.50 0.52 0.03 0.01 20.50 1.80 0.75 0.00 2.75 0.06 0.00 0.00 11.75 0.64 0.06 0.01 20.75 1.81 0.76 0.00 3.00 0.07 0.00 0.00 12.00 1.05 0.25 0.05 21.00 1.81 0.76 0.00 3.25 0.07 0.00 0.00 12.25 1.26 0.37 0.11 21.25 1.82 0.77 0.00 3.50 0.08 0.00 0.00 12.50 1.37 0.45 0.06 21.50 1.83 0.77 0.00 3.75 0.08 0.00 0.00 12.75 1.41 0.48 0.03 21.75 1.83 0.78 0.00 4.00 0.09 0.00 0.00 13.00 1.45 0.50 0.02 22.00 1.84 0.78 0.00 4.25 0.10 0.00 0.00 13.25 1.48 0.52 0.01 22.25 1.84 0.79 0.00 4.50 0.10 0.00 0.00 13.50 1.50 0.54 0.01 22.50 1.85 0.79 0.00 4.75 0.11 0.00 0.00 13.75 1.52 0.55 0.01 22.75 1.85 0.79 0.00 5.00 0.12 0.00 0.00 14.00 1.54 0.56 0.01 23.00 1.86 0.80 0.00 5.25 0.13 0.00 0.00 14.25 1.56 0.58 0.01 23.25 1.86 0.80 0.00 5.50 0.13 0.00 0.00 14.50 1.58 0.59 0.01 23.50 1.87 0.81 0.00 5.75 0.14 0.00 0.00 14.75 1.59 0.60 0.01 23.75 1.88 0.81 0.00 6.00 0.15 0.00 0.00 15.00 1.61 0.61 0.01 24.00 1.88 0.81 0.00 6.25 0.16 0.00 0.00 15.25 1.62 0.62 0.01 6.50 0.17 0.00 0.00 15.50 1.63 0.63 0.01 6.75 0.18 0.00 0.00 15.75 1.64 0.64 0.01 7.00 0.19 0.00 0.00 16.00 1.66 0.65 0.01 7.25 0.19 0.00 0.00 16.25 1.67 0.65 0.00 7.50 0.20 0.00 0.00 16.50 1.68 0.66 0.00 7.75 0.22 0.00 0.00 16.75 1.69 0.67 0.00 8.00 0.23 0.00 0.00 17.00 1.70 0.67 0.00 8.25 0.24 0.00 0.00 17.25 1.71 0.68 0.00 8.50 0.25 0.00 0.00 17.50 1.71 0.69 0.00 8.75 0.26 0.00 0.00 17.75 1.72 0.69 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 30 Summary for Pond EX RCVR: EX RCVR Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 1.08" for 1-yr event Inflow = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af Outflow = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af, Atten= 0%, Lag= 0.0 min Primary = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af Routed to Link POST : Post Development Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.03' @ 12.02 hrs Device Routing Invert Outlet Devices #1 Primary 899.60' 12.0" Round 12" HDPE L= 121.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 899.60' / 899.23' S= 0.0031 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf Primary OutFlow Max=0.43 cfs @ 12.02 hrs HW=900.02' TW=0.00' (Dynamic Tailwater) 1=12" HDPE (Barrel Controls 0.43 cfs @ 2.02 fps) Pond EX RCVR: EX RCVR 12" HDPE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 31 Pond EX RCVR: EX RCVR Hydrograph Inflow 0.45 cfs Primary 0.48 0.45 cfs 0.46 0.44 Inflow Area=0.500 ac 0.42 0.4 Peak Elev=900.03' 0.38 0.36 0.34 12.0" 0.32 0.3 Round Culvert Flow (cfs) 0.28 0.26 0.24 n=0.013 0.22 0.2 L=121.0' 0.18 0.16 0.14 S=0.0031 '/' 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 32 Pond EX RCVR: EX RCVR Stage-Discharge Primary Elevation (feet) 900 12" HDPE 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 33 Pond EX RCVR: EX RCVR Stage-Area-Storage Storage Elevation (feet) 900 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 34 Hydrograph for Pond EX RCVR: EX RCVR Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 899.60 0.00 9.00 0.01 899.66 0.01 18.00 0.02 899.69 0.02 0.25 0.00 899.60 0.00 9.25 0.01 899.67 0.01 18.25 0.02 899.68 0.02 0.50 0.00 899.60 0.00 9.50 0.01 899.67 0.01 18.50 0.02 899.68 0.02 0.75 0.00 899.60 0.00 9.75 0.01 899.67 0.01 18.75 0.01 899.68 0.01 1.00 0.00 899.60 0.00 10.00 0.01 899.68 0.01 19.00 0.01 899.68 0.01 1.25 0.00 899.60 0.00 10.25 0.01 899.68 0.01 19.25 0.01 899.68 0.01 1.50 0.00 899.60 0.00 10.50 0.02 899.68 0.02 19.50 0.01 899.68 0.01 1.75 0.00 899.60 0.00 10.75 0.02 899.69 0.02 19.75 0.01 899.68 0.01 2.00 0.00 899.60 0.00 11.00 0.02 899.70 0.02 20.00 0.01 899.68 0.01 2.25 0.00 899.61 0.00 11.25 0.03 899.71 0.03 20.25 0.01 899.68 0.01 2.50 0.00 899.61 0.00 11.50 0.04 899.73 0.04 20.50 0.01 899.68 0.01 2.75 0.00 899.61 0.00 11.75 0.10 899.81 0.10 20.75 0.01 899.67 0.01 3.00 0.00 899.61 0.00 12.00 0.44 900.02 0.44 21.00 0.01 899.67 0.01 3.25 0.00 899.62 0.00 12.25 0.19 899.87 0.19 21.25 0.01 899.67 0.01 3.50 0.00 899.62 0.00 12.50 0.17 899.86 0.17 21.50 0.01 899.67 0.01 3.75 0.00 899.62 0.00 12.75 0.11 899.82 0.11 21.75 0.01 899.67 0.01 4.00 0.00 899.63 0.00 13.00 0.09 899.79 0.09 22.00 0.01 899.67 0.01 4.25 0.00 899.63 0.00 13.25 0.07 899.77 0.07 22.25 0.01 899.67 0.01 4.50 0.00 899.63 0.00 13.50 0.06 899.76 0.06 22.50 0.01 899.67 0.01 4.75 0.00 899.63 0.00 13.75 0.05 899.75 0.05 22.75 0.01 899.67 0.01 5.00 0.00 899.63 0.00 14.00 0.04 899.74 0.04 23.00 0.01 899.67 0.01 5.25 0.00 899.64 0.00 14.25 0.04 899.73 0.04 23.25 0.01 899.67 0.01 5.50 0.00 899.64 0.00 14.50 0.04 899.72 0.04 23.50 0.01 899.67 0.01 5.75 0.00 899.64 0.00 14.75 0.03 899.72 0.03 23.75 0.01 899.67 0.01 6.00 0.00 899.64 0.00 15.00 0.03 899.71 0.03 24.00 0.01 899.67 0.01 6.25 0.00 899.64 0.00 15.25 0.03 899.71 0.03 6.50 0.00 899.64 0.00 15.50 0.03 899.71 0.03 6.75 0.00 899.65 0.00 15.75 0.02 899.70 0.02 7.00 0.00 899.65 0.00 16.00 0.02 899.70 0.02 7.25 0.00 899.65 0.00 16.25 0.02 899.70 0.02 7.50 0.01 899.65 0.01 16.50 0.02 899.70 0.02 7.75 0.01 899.65 0.01 16.75 0.02 899.69 0.02 8.00 0.01 899.65 0.01 17.00 0.02 899.69 0.02 8.25 0.01 899.66 0.01 17.25 0.02 899.69 0.02 8.50 0.01 899.66 0.01 17.50 0.02 899.69 0.02 8.75 0.01 899.66 0.01 17.75 0.02 899.69 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 35 Summary for Pond RCVR 1: RCVR 1 Inflow Area = 0.340 ac, 70.59% Impervious, Inflow Depth > 0.86" for 1-yr event Inflow = 0.17 cfs @ 11.98 hrs, Volume= 0.024 af Outflow = 0.17 cfs @ 11.98 hrs, Volume= 0.024 af, Atten= 0%, Lag= 0.0 min Primary = 0.17 cfs @ 11.98 hrs, Volume= 0.024 af Routed to Pond RCVR 2 : RCVR 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.87' @ 11.99 hrs Device Routing Invert Outlet Devices #1 Primary 900.56' 8.0" Round RCVR 1 to RCVR 2 L= 59.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.56' / 900.32' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.13 cfs @ 11.98 hrs HW=900.85' TW=900.68' (Dynamic Tailwater) 1=RCVR 1 to RCVR 2 (Outlet Controls 0.13 cfs @ 1.32 fps) Pond RCVR 1: RCVR 1 RCVR 1 to RCVR 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 36 Pond RCVR 1: RCVR 1 Hydrograph Inflow 0.19 0.17 cfs Primary 0.17 cfs 0.18 0.17 Inflow Area=0.340 ac 0.16 0.15 Peak Elev=900.87' 0.14 0.13 8.0" 0.12 Round Culvert 0.11 Flow (cfs) 0.1 n=0.013 0.09 0.08 L=59.0' 0.07 0.06 S=0.0041 '/' 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 37 Pond RCVR 1: RCVR 1 Stage-Discharge Primary 901.2 901.15 901.1 901.05 901 Elevation (feet) 900.95 900.9 900.85 900.8 900.75 900.7 900.65 900.6 RCVR 1 to RCVR 2 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 38 Pond RCVR 1: RCVR 1 Stage-Area-Storage Storage 901.2 901.15 901.1 901.05 901 Elevation (feet) 900.95 900.9 900.85 900.8 900.75 900.7 900.65 900.6 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 39 Hydrograph for Pond RCVR 1: RCVR 1 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.56 0.00 9.00 0.00 900.60 0.00 18.00 0.01 900.64 0.01 0.25 0.00 900.56 0.00 9.25 0.00 900.60 0.00 18.25 0.01 900.63 0.01 0.50 0.00 900.56 0.00 9.50 0.00 900.60 0.00 18.50 0.01 900.63 0.01 0.75 0.00 900.56 0.00 9.75 0.00 900.60 0.00 18.75 0.01 900.63 0.01 1.00 0.00 900.56 0.00 10.00 0.00 900.61 0.00 19.00 0.01 900.63 0.01 1.25 0.00 900.56 0.00 10.25 0.00 900.61 0.00 19.25 0.01 900.63 0.01 1.50 0.00 900.56 0.00 10.50 0.00 900.61 0.00 19.50 0.01 900.63 0.01 1.75 0.00 900.56 0.00 10.75 0.01 900.62 0.01 19.75 0.01 900.63 0.01 2.00 0.00 900.56 0.00 11.00 0.01 900.62 0.01 20.00 0.01 900.63 0.01 2.25 0.00 900.57 0.00 11.25 0.01 900.63 0.01 20.25 0.01 900.63 0.01 2.50 0.00 900.57 0.00 11.50 0.01 900.64 0.01 20.50 0.01 900.63 0.01 2.75 0.00 900.57 0.00 11.75 0.03 900.70 0.03 20.75 0.01 900.63 0.01 3.00 0.00 900.57 0.00 12.00 0.16 900.87 0.16 21.00 0.01 900.62 0.01 3.25 0.00 900.58 0.00 12.25 0.07 900.76 0.07 21.25 0.01 900.62 0.01 3.50 0.00 900.58 0.00 12.50 0.10 900.80 0.10 21.50 0.01 900.62 0.01 3.75 0.00 900.58 0.00 12.75 0.09 900.77 0.09 21.75 0.01 900.62 0.01 4.00 0.00 900.58 0.00 13.00 0.07 900.74 0.07 22.00 0.01 900.62 0.01 4.25 0.00 900.58 0.00 13.25 0.05 900.72 0.05 22.25 0.01 900.62 0.01 4.50 0.00 900.58 0.00 13.50 0.04 900.71 0.04 22.50 0.01 900.62 0.01 4.75 0.00 900.58 0.00 13.75 0.04 900.70 0.04 22.75 0.01 900.62 0.01 5.00 0.00 900.58 0.00 14.00 0.03 900.69 0.03 23.00 0.01 900.62 0.01 5.25 0.00 900.58 0.00 14.25 0.03 900.68 0.03 23.25 0.01 900.62 0.01 5.50 0.00 900.58 0.00 14.50 0.03 900.67 0.03 23.50 0.01 900.62 0.01 5.75 0.00 900.59 0.00 14.75 0.02 900.67 0.02 23.75 0.01 900.62 0.01 6.00 0.00 900.59 0.00 15.00 0.02 900.66 0.02 24.00 0.01 900.62 0.01 6.25 0.00 900.59 0.00 15.25 0.02 900.66 0.02 6.50 0.00 900.59 0.00 15.50 0.02 900.66 0.02 6.75 0.00 900.59 0.00 15.75 0.02 900.65 0.02 7.00 0.00 900.59 0.00 16.00 0.02 900.65 0.02 7.25 0.00 900.59 0.00 16.25 0.02 900.65 0.02 7.50 0.00 900.59 0.00 16.50 0.01 900.65 0.01 7.75 0.00 900.59 0.00 16.75 0.01 900.64 0.01 8.00 0.00 900.59 0.00 17.00 0.01 900.64 0.01 8.25 0.00 900.59 0.00 17.25 0.01 900.64 0.01 8.50 0.00 900.60 0.00 17.50 0.01 900.64 0.01 8.75 0.00 900.60 0.00 17.75 0.01 900.64 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 40 Summary for Pond RCVR 2: RCVR 2 Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 1.08" for 1-yr event Inflow = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af Outflow = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af, Atten= 0%, Lag= 0.0 min Primary = 0.45 cfs @ 12.02 hrs, Volume= 0.045 af Routed to Pond EX RCVR : EX RCVR Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.73' @ 12.02 hrs Device Routing Invert Outlet Devices #1 Primary 900.32' 8.0" Round RCVR 2 to EX RCVR L= 72.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.32' / 899.60' S= 0.0100 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.42 cfs @ 12.02 hrs HW=900.72' TW=900.02' (Dynamic Tailwater) 1=RCVR 2 to EX RCVR (Outlet Controls 0.42 cfs @ 2.78 fps) Pond RCVR 2: RCVR 2 RCVR 2 to EX RCVR

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 41 Pond RCVR 2: RCVR 2 Hydrograph Inflow 0.45 cfs Primary 0.48 0.45 cfs 0.46 0.44 Inflow Area=0.500 ac 0.42 0.4 Peak Elev=900.73' 0.38 0.36 0.34 8.0" 0.32 0.3 Round Culvert Flow (cfs) 0.28 0.26 0.24 n=0.013 0.22 0.2 L=72.0' 0.18 0.16 0.14 S=0.0100 '/' 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 42 Pond RCVR 2: RCVR 2 Stage-Discharge Primary 900.95 900.9 900.85 900.8 900.75 Elevation (feet) 900.7 900.65 900.6 900.55 900.5 900.45 900.4 900.35 RCVR 2 to EX RCVR 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 43 Pond RCVR 2: RCVR 2 Stage-Area-Storage Storage 900.95 900.9 900.85 900.8 900.75 Elevation (feet) 900.7 900.65 900.6 900.55 900.5 900.45 900.4 900.35 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 44 Hydrograph for Pond RCVR 2: RCVR 2 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.32 0.00 9.00 0.01 900.37 0.01 18.00 0.02 900.39 0.02 0.25 0.00 900.32 0.00 9.25 0.01 900.38 0.01 18.25 0.02 900.39 0.02 0.50 0.00 900.32 0.00 9.50 0.01 900.38 0.01 18.50 0.02 900.39 0.02 0.75 0.00 900.32 0.00 9.75 0.01 900.38 0.01 18.75 0.01 900.39 0.01 1.00 0.00 900.32 0.00 10.00 0.01 900.38 0.01 19.00 0.01 900.39 0.01 1.25 0.00 900.32 0.00 10.25 0.01 900.39 0.01 19.25 0.01 900.39 0.01 1.50 0.00 900.32 0.00 10.50 0.02 900.39 0.02 19.50 0.01 900.39 0.01 1.75 0.00 900.32 0.00 10.75 0.02 900.40 0.02 19.75 0.01 900.39 0.01 2.00 0.00 900.32 0.00 11.00 0.02 900.40 0.02 20.00 0.01 900.39 0.01 2.25 0.00 900.33 0.00 11.25 0.03 900.41 0.03 20.25 0.01 900.39 0.01 2.50 0.00 900.33 0.00 11.50 0.04 900.43 0.04 20.50 0.01 900.38 0.01 2.75 0.00 900.33 0.00 11.75 0.10 900.50 0.10 20.75 0.01 900.38 0.01 3.00 0.00 900.33 0.00 12.00 0.44 900.72 0.44 21.00 0.01 900.38 0.01 3.25 0.00 900.34 0.00 12.25 0.19 900.57 0.19 21.25 0.01 900.38 0.01 3.50 0.00 900.34 0.00 12.50 0.17 900.56 0.17 21.50 0.01 900.38 0.01 3.75 0.00 900.34 0.00 12.75 0.11 900.51 0.11 21.75 0.01 900.38 0.01 4.00 0.00 900.34 0.00 13.00 0.09 900.49 0.09 22.00 0.01 900.38 0.01 4.25 0.00 900.34 0.00 13.25 0.07 900.47 0.07 22.25 0.01 900.38 0.01 4.50 0.00 900.35 0.00 13.50 0.06 900.46 0.06 22.50 0.01 900.38 0.01 4.75 0.00 900.35 0.00 13.75 0.05 900.45 0.05 22.75 0.01 900.38 0.01 5.00 0.00 900.35 0.00 14.00 0.04 900.44 0.04 23.00 0.01 900.38 0.01 5.25 0.00 900.35 0.00 14.25 0.04 900.43 0.04 23.25 0.01 900.38 0.01 5.50 0.00 900.35 0.00 14.50 0.04 900.43 0.04 23.50 0.01 900.38 0.01 5.75 0.00 900.35 0.00 14.75 0.03 900.42 0.03 23.75 0.01 900.38 0.01 6.00 0.00 900.35 0.00 15.00 0.03 900.42 0.03 24.00 0.01 900.38 0.01 6.25 0.00 900.36 0.00 15.25 0.03 900.41 0.03 6.50 0.00 900.36 0.00 15.50 0.03 900.41 0.03 6.75 0.00 900.36 0.00 15.75 0.02 900.41 0.02 7.00 0.00 900.36 0.00 16.00 0.02 900.41 0.02 7.25 0.00 900.36 0.00 16.25 0.02 900.40 0.02 7.50 0.01 900.36 0.01 16.50 0.02 900.40 0.02 7.75 0.01 900.36 0.01 16.75 0.02 900.40 0.02 8.00 0.01 900.37 0.01 17.00 0.02 900.40 0.02 8.25 0.01 900.37 0.01 17.25 0.02 900.40 0.02 8.50 0.01 900.37 0.01 17.50 0.02 900.40 0.02 8.75 0.01 900.37 0.01 17.75 0.02 900.39 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 45 Summary for Pond RCVR 3: RCVR 3 Inflow Area = 0.150 ac, 93.33% Impervious, Inflow Depth > 1.55" for 1-yr event Inflow = 0.33 cfs @ 12.05 hrs, Volume= 0.019 af Outflow = 0.33 cfs @ 12.05 hrs, Volume= 0.019 af, Atten= 0%, Lag= 0.0 min Primary = 0.33 cfs @ 12.05 hrs, Volume= 0.019 af Routed to Pond RCVR 2 : RCVR 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.92' @ 12.06 hrs Device Routing Invert Outlet Devices #1 Primary 900.48' 8.0" Round RCVR 3 to RCVR 2 L= 39.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.48' / 900.32' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.33 cfs @ 12.05 hrs HW=900.92' TW=900.71' (Dynamic Tailwater) 1=RCVR 3 to RCVR 2 (Outlet Controls 0.33 cfs @ 1.92 fps) Pond RCVR 3: RCVR 3 RCVR 3 to RCVR 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 46 Pond RCVR 3: RCVR 3 Hydrograph Inflow 0.33 cfs Primary 0.36 0.33 cfs 0.34 0.32 Inflow Area=0.150 ac 0.3 Peak Elev=900.92' 0.28 0.26 8.0" 0.24 0.22 Round Culvert Flow (cfs) 0.2 0.18 n=0.013 0.16 0.14 L=39.0' 0.12 S=0.0041 '/' 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 47 Pond RCVR 3: RCVR 3 Stage-Discharge Primary 901.1 901.05 901 900.95 900.9 Elevation (feet) 900.85 900.8 900.75 900.7 900.65 900.6 900.55 900.5 RCVR 3 to RCVR 2 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 48 Pond RCVR 3: RCVR 3 Stage-Area-Storage Storage 901.1 901.05 901 900.95 900.9 Elevation (feet) 900.85 900.8 900.75 900.7 900.65 900.6 900.55 900.5 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 49 Hydrograph for Pond RCVR 3: RCVR 3 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.48 0.00 9.00 0.01 900.53 0.01 18.00 0.00 900.53 0.00 0.25 0.00 900.48 0.00 9.25 0.01 900.54 0.01 18.25 0.00 900.53 0.00 0.50 0.00 900.48 0.00 9.50 0.01 900.54 0.01 18.50 0.00 900.53 0.00 0.75 0.00 900.48 0.00 9.75 0.01 900.54 0.01 18.75 0.00 900.53 0.00 1.00 0.00 900.48 0.00 10.00 0.01 900.54 0.01 19.00 0.00 900.53 0.00 1.25 0.00 900.48 0.00 10.25 0.01 900.55 0.01 19.25 0.00 900.53 0.00 1.50 0.00 900.48 0.00 10.50 0.01 900.55 0.01 19.50 0.00 900.53 0.00 1.75 0.00 900.48 0.00 10.75 0.01 900.56 0.01 19.75 0.00 900.53 0.00 2.00 0.00 900.48 0.00 11.00 0.01 900.57 0.01 20.00 0.00 900.53 0.00 2.25 0.00 900.48 0.00 11.25 0.02 900.58 0.02 20.25 0.00 900.53 0.00 2.50 0.00 900.48 0.00 11.50 0.02 900.59 0.02 20.50 0.00 900.53 0.00 2.75 0.00 900.48 0.00 11.75 0.06 900.66 0.06 20.75 0.00 900.53 0.00 3.00 0.00 900.48 0.00 12.00 0.25 900.85 0.25 21.00 0.00 900.53 0.00 3.25 0.00 900.49 0.00 12.25 0.12 900.74 0.12 21.25 0.00 900.53 0.00 3.50 0.00 900.49 0.00 12.50 0.06 900.68 0.06 21.50 0.00 900.52 0.00 3.75 0.00 900.50 0.00 12.75 0.03 900.61 0.03 21.75 0.00 900.52 0.00 4.00 0.00 900.50 0.00 13.00 0.02 900.59 0.02 22.00 0.00 900.52 0.00 4.25 0.00 900.50 0.00 13.25 0.02 900.58 0.02 22.25 0.00 900.52 0.00 4.50 0.00 900.50 0.00 13.50 0.01 900.57 0.01 22.50 0.00 900.52 0.00 4.75 0.00 900.50 0.00 13.75 0.01 900.57 0.01 22.75 0.00 900.52 0.00 5.00 0.00 900.51 0.00 14.00 0.01 900.56 0.01 23.00 0.00 900.52 0.00 5.25 0.00 900.51 0.00 14.25 0.01 900.56 0.01 23.25 0.00 900.52 0.00 5.50 0.00 900.51 0.00 14.50 0.01 900.55 0.01 23.50 0.00 900.52 0.00 5.75 0.00 900.51 0.00 14.75 0.01 900.55 0.01 23.75 0.00 900.52 0.00 6.00 0.00 900.51 0.00 15.00 0.01 900.55 0.01 24.00 0.00 900.52 0.00 6.25 0.00 900.51 0.00 15.25 0.01 900.55 0.01 6.50 0.00 900.52 0.00 15.50 0.01 900.55 0.01 6.75 0.00 900.52 0.00 15.75 0.01 900.54 0.01 7.00 0.00 900.52 0.00 16.00 0.01 900.54 0.01 7.25 0.00 900.52 0.00 16.25 0.01 900.54 0.01 7.50 0.00 900.52 0.00 16.50 0.01 900.54 0.01 7.75 0.00 900.52 0.00 16.75 0.01 900.54 0.01 8.00 0.00 900.53 0.00 17.00 0.01 900.54 0.01 8.25 0.00 900.53 0.00 17.25 0.01 900.54 0.01 8.50 0.00 900.53 0.00 17.50 0.01 900.53 0.01 8.75 0.00 900.53 0.00 17.75 0.01 900.53 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 50 Summary for Pond RCVR 4: RCVR 4 Inflow Area = 0.080 ac, 87.50% Impervious, Inflow Depth > 1.46" for 1-yr event Inflow = 0.17 cfs @ 12.04 hrs, Volume= 0.010 af Outflow = 0.17 cfs @ 12.04 hrs, Volume= 0.010 af, Atten= 0%, Lag= 0.0 min Primary = 0.17 cfs @ 12.04 hrs, Volume= 0.010 af Routed to Pond RCVR 5 : RCVR 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.49' @ 12.05 hrs Device Routing Invert Outlet Devices #1 Primary 901.13' 8.0" Round RCVR 4 to RCVR 5 L= 22.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 901.13' / 901.04' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.19 cfs @ 12.04 hrs HW=901.48' TW=901.38' (Dynamic Tailwater) 1=RCVR 4 to RCVR 5 (Outlet Controls 0.19 cfs @ 1.48 fps) Pond RCVR 4: RCVR 4 RCVR 4 to RCVR 5

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 51 Pond RCVR 4: RCVR 4 Hydrograph Inflow 0.19 0.17 cfs Primary 0.17 cfs 0.18 0.17 Inflow Area=0.080 ac 0.16 0.15 Peak Elev=901.49' 0.14 8.0" 0.13 0.12 Round Culvert Flow (cfs) 0.11 0.1 n=0.013 0.09 0.08 L=22.0' 0.07 0.06 S=0.0041 '/' 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 52 Pond RCVR 4: RCVR 4 Stage-Discharge Primary 901.75 901.7 901.65 901.6 901.55 Elevation (feet) 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 RCVR 4 to RCVR 5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 53 Pond RCVR 4: RCVR 4 Stage-Area-Storage Storage 901.75 901.7 901.65 901.6 901.55 Elevation (feet) 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 54 Hydrograph for Pond RCVR 4: RCVR 4 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 901.13 0.00 9.00 0.00 901.17 0.00 18.00 0.00 901.17 0.00 0.25 0.00 901.13 0.00 9.25 0.00 901.17 0.00 18.25 0.00 901.17 0.00 0.50 0.00 901.13 0.00 9.50 0.00 901.17 0.00 18.50 0.00 901.17 0.00 0.75 0.00 901.13 0.00 9.75 0.00 901.17 0.00 18.75 0.00 901.17 0.00 1.00 0.00 901.13 0.00 10.00 0.00 901.18 0.00 19.00 0.00 901.17 0.00 1.25 0.00 901.13 0.00 10.25 0.00 901.18 0.00 19.25 0.00 901.17 0.00 1.50 0.00 901.13 0.00 10.50 0.00 901.18 0.00 19.50 0.00 901.17 0.00 1.75 0.00 901.13 0.00 10.75 0.01 901.19 0.01 19.75 0.00 901.17 0.00 2.00 0.00 901.13 0.00 11.00 0.01 901.19 0.01 20.00 0.00 901.17 0.00 2.25 0.00 901.13 0.00 11.25 0.01 901.20 0.01 20.25 0.00 901.16 0.00 2.50 0.00 901.13 0.00 11.50 0.01 901.21 0.01 20.50 0.00 901.16 0.00 2.75 0.00 901.13 0.00 11.75 0.03 901.27 0.03 20.75 0.00 901.16 0.00 3.00 0.00 901.13 0.00 12.00 0.15 901.44 0.15 21.00 0.00 901.16 0.00 3.25 0.00 901.13 0.00 12.25 0.06 901.32 0.06 21.25 0.00 901.16 0.00 3.50 0.00 901.13 0.00 12.50 0.03 901.28 0.03 21.50 0.00 901.16 0.00 3.75 0.00 901.13 0.00 12.75 0.01 901.22 0.01 21.75 0.00 901.16 0.00 4.00 0.00 901.14 0.00 13.00 0.01 901.21 0.01 22.00 0.00 901.16 0.00 4.25 0.00 901.14 0.00 13.25 0.01 901.20 0.01 22.25 0.00 901.16 0.00 4.50 0.00 901.14 0.00 13.50 0.01 901.20 0.01 22.50 0.00 901.16 0.00 4.75 0.00 901.14 0.00 13.75 0.01 901.19 0.01 22.75 0.00 901.16 0.00 5.00 0.00 901.14 0.00 14.00 0.01 901.19 0.01 23.00 0.00 901.16 0.00 5.25 0.00 901.15 0.00 14.25 0.01 901.19 0.01 23.25 0.00 901.16 0.00 5.50 0.00 901.15 0.00 14.50 0.00 901.18 0.00 23.50 0.00 901.16 0.00 5.75 0.00 901.15 0.00 14.75 0.00 901.18 0.00 23.75 0.00 901.16 0.00 6.00 0.00 901.15 0.00 15.00 0.00 901.18 0.00 24.00 0.00 901.16 0.00 6.25 0.00 901.15 0.00 15.25 0.00 901.18 0.00 6.50 0.00 901.15 0.00 15.50 0.00 901.18 0.00 6.75 0.00 901.15 0.00 15.75 0.00 901.18 0.00 7.00 0.00 901.16 0.00 16.00 0.00 901.18 0.00 7.25 0.00 901.16 0.00 16.25 0.00 901.17 0.00 7.50 0.00 901.16 0.00 16.50 0.00 901.17 0.00 7.75 0.00 901.16 0.00 16.75 0.00 901.17 0.00 8.00 0.00 901.16 0.00 17.00 0.00 901.17 0.00 8.25 0.00 901.16 0.00 17.25 0.00 901.17 0.00 8.50 0.00 901.16 0.00 17.50 0.00 901.17 0.00 8.75 0.00 901.17 0.00 17.75 0.00 901.17 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 55 Summary for Pond RCVR 5: RCVR 5 Inflow Area = 0.130 ac, 92.31% Impervious, Inflow Depth > 1.53" for 1-yr event Inflow = 0.28 cfs @ 12.01 hrs, Volume= 0.017 af Outflow = 0.28 cfs @ 12.01 hrs, Volume= 0.017 af, Atten= 0%, Lag= 0.0 min Primary = 0.28 cfs @ 12.01 hrs, Volume= 0.017 af Routed to Pond SWALE : SWALE Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.41' @ 12.01 hrs Device Routing Invert Outlet Devices #1 Primary 901.04' 8.0" Round RCVR 5 to SWALE L= 89.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 901.04' / 900.68' S= 0.0040 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.28 cfs @ 12.01 hrs HW=901.41' TW=900.56' (Dynamic Tailwater) 1=RCVR 5 to SWALE (Barrel Controls 0.28 cfs @ 2.01 fps) Pond RCVR 5: RCVR 5 RCVR 5 to SWALE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 56 Pond RCVR 5: RCVR 5 Hydrograph Inflow 0.28 cfs Primary 0.3 0.28 cfs 0.28 Inflow Area=0.130 ac 0.26 Peak Elev=901.41' 0.24 0.22 8.0" 0.2 Round Culvert 0.18 Flow (cfs) 0.16 n=0.013 0.14 0.12 L=89.0' 0.1 S=0.0040 '/' 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 57 Pond RCVR 5: RCVR 5 Stage-Discharge 901.7 Primary 901.65 901.6 901.55 901.5 901.45 Elevation (feet) 901.4 901.35 901.3 901.25 901.2 901.15 901.1 RCVR 5 to SWALE 901.05 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 58 Pond RCVR 5: RCVR 5 Stage-Area-Storage 901.7 Storage 901.65 901.6 901.55 901.5 901.45 Elevation (feet) 901.4 901.35 901.3 901.25 901.2 901.15 901.1 901.05 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 59 Hydrograph for Pond RCVR 5: RCVR 5 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 901.04 0.00 9.00 0.00 901.09 0.00 18.00 0.00 901.09 0.00 0.25 0.00 901.04 0.00 9.25 0.00 901.09 0.00 18.25 0.00 901.09 0.00 0.50 0.00 901.04 0.00 9.50 0.01 901.09 0.01 18.50 0.00 901.09 0.00 0.75 0.00 901.04 0.00 9.75 0.01 901.10 0.01 18.75 0.00 901.09 0.00 1.00 0.00 901.04 0.00 10.00 0.01 901.10 0.01 19.00 0.00 901.09 0.00 1.25 0.00 901.04 0.00 10.25 0.01 901.10 0.01 19.25 0.00 901.09 0.00 1.50 0.00 901.04 0.00 10.50 0.01 901.11 0.01 19.50 0.00 901.08 0.00 1.75 0.00 901.04 0.00 10.75 0.01 901.11 0.01 19.75 0.00 901.08 0.00 2.00 0.00 901.04 0.00 11.00 0.01 901.12 0.01 20.00 0.00 901.08 0.00 2.25 0.00 901.05 0.00 11.25 0.02 901.13 0.02 20.25 0.00 901.08 0.00 2.50 0.00 901.05 0.00 11.50 0.02 901.14 0.02 20.50 0.00 901.08 0.00 2.75 0.00 901.05 0.00 11.75 0.06 901.21 0.06 20.75 0.00 901.08 0.00 3.00 0.00 901.05 0.00 12.00 0.28 901.41 0.28 21.00 0.00 901.08 0.00 3.25 0.00 901.05 0.00 12.25 0.08 901.24 0.08 21.25 0.00 901.08 0.00 3.50 0.00 901.05 0.00 12.50 0.05 901.21 0.05 21.50 0.00 901.08 0.00 3.75 0.00 901.06 0.00 12.75 0.02 901.15 0.02 21.75 0.00 901.08 0.00 4.00 0.00 901.06 0.00 13.00 0.02 901.14 0.02 22.00 0.00 901.08 0.00 4.25 0.00 901.06 0.00 13.25 0.01 901.13 0.01 22.25 0.00 901.08 0.00 4.50 0.00 901.06 0.00 13.50 0.01 901.12 0.01 22.50 0.00 901.08 0.00 4.75 0.00 901.06 0.00 13.75 0.01 901.12 0.01 22.75 0.00 901.08 0.00 5.00 0.00 901.06 0.00 14.00 0.01 901.11 0.01 23.00 0.00 901.08 0.00 5.25 0.00 901.07 0.00 14.25 0.01 901.11 0.01 23.25 0.00 901.08 0.00 5.50 0.00 901.07 0.00 14.50 0.01 901.11 0.01 23.50 0.00 901.08 0.00 5.75 0.00 901.07 0.00 14.75 0.01 901.10 0.01 23.75 0.00 901.08 0.00 6.00 0.00 901.07 0.00 15.00 0.01 901.10 0.01 24.00 0.00 901.08 0.00 6.25 0.00 901.07 0.00 15.25 0.01 901.10 0.01 6.50 0.00 901.07 0.00 15.50 0.01 901.10 0.01 6.75 0.00 901.07 0.00 15.75 0.01 901.10 0.01 7.00 0.00 901.08 0.00 16.00 0.01 901.10 0.01 7.25 0.00 901.08 0.00 16.25 0.01 901.09 0.01 7.50 0.00 901.08 0.00 16.50 0.01 901.09 0.01 7.75 0.00 901.08 0.00 16.75 0.01 901.09 0.01 8.00 0.00 901.08 0.00 17.00 0.00 901.09 0.00 8.25 0.00 901.08 0.00 17.25 0.00 901.09 0.00 8.50 0.00 901.08 0.00 17.50 0.00 901.09 0.00 8.75 0.00 901.09 0.00 17.75 0.00 901.09 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 60 Summary for Pond SWALE: SWALE Inflow Area = 0.280 ac, 64.29% Impervious, Inflow Depth > 1.15" for 1-yr event Inflow = 0.34 cfs @ 12.02 hrs, Volume= 0.027 af Outflow = 0.09 cfs @ 12.60 hrs, Volume= 0.016 af, Atten= 74%, Lag= 35.0 min Primary = 0.09 cfs @ 12.60 hrs, Volume= 0.016 af Routed to Pond RCVR 1 : RCVR 1 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.91' @ 12.57 hrs Surf.Area= 978 sf Storage= 624 cf Plug-Flow detention time= 226.6 min calculated for 0.016 af (60% of inflow) Center-of-Mass det. time= 117.4 min ( 924.2 - 806.9 ) Volume Invert Avail.Storage Storage Description #1 900.00' 2,104 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 900.00 396 0 0 901.00 1,038 717 717 902.00 1,736 1,387 2,104 Device Routing Invert Outlet Devices #1 Primary 900.68' 8.0" Round 8" HDPE L= 32.0' CPP, mitered to conform to fill, Ke= 0.700 Inlet / Outlet Invert= 900.68' / 900.55' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.09 cfs @ 12.60 hrs HW=900.91' TW=900.79' (Dynamic Tailwater) 1=8" HDPE (Outlet Controls 0.09 cfs @ 1.23 fps)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 61 Pond SWALE: SWALE 8" HDPE Pond SWALE: SWALE Hydrograph Inflow 0.34 cfs Primary 0.36 0.34 Inflow Area=0.280 ac 0.32 0.3 Peak Elev=900.91' 0.28 0.26 Storage=624 cf 0.24 0.22 8.0" Flow (cfs) 0.2 Round Culvert 0.18 0.16 n=0.013 0.14 0.12 L=32.0' 0.09 cfs 0.1 0.08 S=0.0041 '/' 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 62 Pond SWALE: SWALE Stage-Discharge 902 Primary Elevation (feet) 901 8" HDPE Initial Tailwater 900 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 63 Pond SWALE: SWALE Stage-Area-Storage Surface/Horizontal/Wetted Area (sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 Surface Storage 902 Elevation (feet) 901 Custom Stage Data 900 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 Storage (cubic-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 64 Hydrograph for Pond SWALE: SWALE Time Inflow Storage Elevation Primary Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 900.00 0.00 18.00 0.01 479 900.75 0.01 0.50 0.00 0 900.00 0.00 18.50 0.01 477 900.75 0.01 1.00 0.00 0 900.00 0.00 19.00 0.01 475 900.75 0.01 1.50 0.00 0 900.00 0.00 19.50 0.01 474 900.75 0.01 2.00 0.00 0 900.00 0.00 20.00 0.01 472 900.74 0.01 2.50 0.00 0 900.00 0.00 20.50 0.01 471 900.74 0.01 3.00 0.00 0 900.00 0.00 21.00 0.01 470 900.74 0.01 3.50 0.00 1 900.00 0.00 21.50 0.01 469 900.74 0.01 4.00 0.00 2 900.00 0.00 22.00 0.01 468 900.74 0.01 4.50 0.00 3 900.01 0.00 22.50 0.01 467 900.74 0.01 5.00 0.00 5 900.01 0.00 23.00 0.01 466 900.74 0.01 5.50 0.00 7 900.02 0.00 23.50 0.00 465 900.74 0.01 6.00 0.00 9 900.02 0.00 24.00 0.00 464 900.73 0.01 6.50 0.00 12 900.03 0.00 7.00 0.00 16 900.04 0.00 7.50 0.00 21 900.05 0.00 8.00 0.00 26 900.06 0.00 8.50 0.00 32 900.08 0.00 9.00 0.00 40 900.09 0.00 9.50 0.01 48 900.11 0.00 10.00 0.01 60 900.14 0.00 10.50 0.01 75 900.17 0.00 11.00 0.01 96 900.21 0.00 11.50 0.03 131 900.27 0.00 12.00 0.33 312 900.55 0.00 12.50 0.11 620 900.90 0.08 13.00 0.03 584 900.87 0.06 13.50 0.02 547 900.83 0.04 14.00 0.02 526 900.80 0.03 14.50 0.02 513 900.79 0.02 15.00 0.01 504 900.78 0.02 15.50 0.01 497 900.77 0.02 16.00 0.01 492 900.77 0.01 16.50 0.01 488 900.76 0.01 17.00 0.01 485 900.76 0.01 17.50 0.01 482 900.75 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 65 Summary for Link POST: Post Development Inflow Area = 0.690 ac, 56.52% Impervious, Inflow Depth > 0.92" for 1-yr event Inflow = 0.45 cfs @ 12.02 hrs, Volume= 0.053 af Primary = 0.45 cfs @ 12.02 hrs, Volume= 0.053 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link POST: Post Development Hydrograph Inflow 0.5 0.45 cfs Primary 0.48 0.45 cfs 0.46 Inflow Area=0.690 ac 0.44 0.42 0.4 0.38 0.36 0.34 0.32 0.3 Flow (cfs) 0.28 0.26 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 66 Hydrograph for Link POST: Post Development Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 9.00 0.01 0.00 0.01 18.00 0.02 0.00 0.02 0.25 0.00 0.00 0.00 9.25 0.01 0.00 0.01 18.25 0.02 0.00 0.02 0.50 0.00 0.00 0.00 9.50 0.01 0.00 0.01 18.50 0.02 0.00 0.02 0.75 0.00 0.00 0.00 9.75 0.01 0.00 0.01 18.75 0.02 0.00 0.02 1.00 0.00 0.00 0.00 10.00 0.01 0.00 0.01 19.00 0.02 0.00 0.02 1.25 0.00 0.00 0.00 10.25 0.01 0.00 0.01 19.25 0.02 0.00 0.02 1.50 0.00 0.00 0.00 10.50 0.02 0.00 0.02 19.50 0.02 0.00 0.02 1.75 0.00 0.00 0.00 10.75 0.02 0.00 0.02 19.75 0.02 0.00 0.02 2.00 0.00 0.00 0.00 11.00 0.02 0.00 0.02 20.00 0.02 0.00 0.02 2.25 0.00 0.00 0.00 11.25 0.03 0.00 0.03 20.25 0.02 0.00 0.02 2.50 0.00 0.00 0.00 11.50 0.04 0.00 0.04 20.50 0.02 0.00 0.02 2.75 0.00 0.00 0.00 11.75 0.10 0.00 0.10 20.75 0.01 0.00 0.01 3.00 0.00 0.00 0.00 12.00 0.44 0.00 0.44 21.00 0.01 0.00 0.01 3.25 0.00 0.00 0.00 12.25 0.23 0.00 0.23 21.25 0.01 0.00 0.01 3.50 0.00 0.00 0.00 12.50 0.23 0.00 0.23 21.50 0.01 0.00 0.01 3.75 0.00 0.00 0.00 12.75 0.16 0.00 0.16 21.75 0.01 0.00 0.01 4.00 0.00 0.00 0.00 13.00 0.11 0.00 0.11 22.00 0.01 0.00 0.01 4.25 0.00 0.00 0.00 13.25 0.09 0.00 0.09 22.25 0.01 0.00 0.01 4.50 0.00 0.00 0.00 13.50 0.07 0.00 0.07 22.50 0.01 0.00 0.01 4.75 0.00 0.00 0.00 13.75 0.06 0.00 0.06 22.75 0.01 0.00 0.01 5.00 0.00 0.00 0.00 14.00 0.05 0.00 0.05 23.00 0.01 0.00 0.01 5.25 0.00 0.00 0.00 14.25 0.05 0.00 0.05 23.25 0.01 0.00 0.01 5.50 0.00 0.00 0.00 14.50 0.04 0.00 0.04 23.50 0.01 0.00 0.01 5.75 0.00 0.00 0.00 14.75 0.04 0.00 0.04 23.75 0.01 0.00 0.01 6.00 0.00 0.00 0.00 15.00 0.04 0.00 0.04 24.00 0.01 0.00 0.01 6.25 0.00 0.00 0.00 15.25 0.03 0.00 0.03 6.50 0.00 0.00 0.00 15.50 0.03 0.00 0.03 6.75 0.00 0.00 0.00 15.75 0.03 0.00 0.03 7.00 0.00 0.00 0.00 16.00 0.03 0.00 0.03 7.25 0.00 0.00 0.00 16.25 0.03 0.00 0.03 7.50 0.01 0.00 0.01 16.50 0.03 0.00 0.03 7.75 0.01 0.00 0.01 16.75 0.02 0.00 0.02 8.00 0.01 0.00 0.01 17.00 0.02 0.00 0.02 8.25 0.01 0.00 0.01 17.25 0.02 0.00 0.02 8.50 0.01 0.00 0.01 17.50 0.02 0.00 0.02 8.75 0.01 0.00 0.01 17.75 0.02 0.00 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 67 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment ATO: Area to Offsite Runoff Area=0.190 ac 0.00% Impervious Runoff Depth>1.35" Flow Length=60' Slope=0.0050 '/' Tc=30.0 min CN=80 Runoff=0.20 cfs 0.021 af Subcatchment DA 1: Drainage Area 1 Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>2.91" Flow Length=80' Slope=0.0100 '/' Tc=1.6 min CN=98 Runoff=0.29 cfs 0.015 af Subcatchment DA 2: Drainage Area 2 Runoff Area=0.010 ac 100.00% Impervious Runoff Depth>2.91" Flow Length=35' Slope=0.0100 '/' Tc=0.8 min CN=98 Runoff=0.05 cfs 0.002 af Subcatchment DA 3: Drainage Area 3 Runoff Area=0.150 ac 93.33% Impervious Runoff Depth>2.79" Flow Length=75' Slope=0.0100 '/' Tc=7.2 min CN=97 Runoff=0.57 cfs 0.035 af Subcatchment DA 4: Drainage Area 4 Runoff Area=0.080 ac 87.50% Impervious Runoff Depth>2.69" Flow Length=20' Slope=0.0100 '/' Tc=6.3 min CN=96 Runoff=0.31 cfs 0.018 af Subcatchment DA 5: Drainage Area 5 Runoff Area=0.050 ac 100.00% Impervious Runoff Depth>2.91" Flow Length=60' Slope=0.0050 '/' Tc=1.7 min CN=98 Runoff=0.24 cfs 0.012 af Subcatchment DA 6: Drainage Area 6 Runoff Area=0.150 ac 40.00% Impervious Runoff Depth>1.86" Flow Length=40' Slope=0.0045 '/' Tc=15.0 min CN=87 Runoff=0.31 cfs 0.023 af Pond EX RCVR: EX RCVR Peak Elev=900.21' Inflow=0.87 cfs 0.094 af 12.0" Round Culvert n=0.013 L=121.0' S=0.0031 '/' Outflow=0.87 cfs 0.094 af Pond RCVR 1: RCVR 1 Peak Elev=901.10' Inflow=0.43 cfs 0.057 af 8.0" Round Culvert n=0.013 L=59.0' S=0.0041 '/' Outflow=0.43 cfs 0.057 af Pond RCVR 2: RCVR 2 Peak Elev=900.95' Inflow=0.87 cfs 0.094 af 8.0" Round Culvert n=0.013 L=72.0' S=0.0100 '/' Outflow=0.87 cfs 0.094 af Pond RCVR 3: RCVR 3 Peak Elev=901.12' Inflow=0.57 cfs 0.035 af 8.0" Round Culvert n=0.013 L=39.0' S=0.0041 '/' Outflow=0.57 cfs 0.035 af

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 68 Pond RCVR 4: RCVR 4 Peak Elev=901.64' Inflow=0.31 cfs 0.018 af 8.0" Round Culvert n=0.013 L=22.0' S=0.0041 '/' Outflow=0.31 cfs 0.018 af Pond RCVR 5: RCVR 5 Peak Elev=901.56' Inflow=0.49 cfs 0.030 af 8.0" Round Culvert n=0.013 L=89.0' S=0.0040 '/' Outflow=0.49 cfs 0.030 af Pond SWALE: SWALE Peak Elev=901.23' Storage=972 cf Inflow=0.64 cfs 0.053 af 8.0" Round Culvert n=0.013 L=32.0' S=0.0041 '/' Outflow=0.37 cfs 0.042 af Link POST: Post Development Inflow=0.93 cfs 0.115 af Primary=0.93 cfs 0.115 af Total Runoff Area = 0.690 ac Runoff Volume = 0.126 af Average Runoff Depth = 2.20" 43.48% Pervious = 0.300 ac 56.52% Impervious = 0.390 ac

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 69 Summary for Subcatchment ATO: Area to Offsite Runoff = 0.20 cfs @ 12.39 hrs, Volume= 0.021 af, Depth> 1.35" Routed to Link POST : Post Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.190 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 30.0 60 0.0050 0.03 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 2.20" Subcatchment ATO: Area to Offsite

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 70 Subcatchment ATO: Area to Offsite Hydrograph Runoff 0.21 0.20 cfs 0.2 extreme_precip_tables_output (29) 24-hr S1 10-yr 0.19 Rainfall=3.14" 0.18 Runoff Area=0.190 ac 0.17 Runoff Volume=0.021 af 0.16 Runoff Depth>1.35" 0.15 Flow Length=60' 0.14 Slope=0.0050 '/' Tc=30.0 min 0.13 CN=80 Flow (cfs) 0.12 0.11 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 71 Hydrograph for Subcatchment ATO: Area to Offsite Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.00 0.00 18.00 2.91 1.18 0.01 0.25 0.01 0.00 0.00 9.25 0.45 0.00 0.00 18.25 2.92 1.19 0.01 0.50 0.02 0.00 0.00 9.50 0.48 0.00 0.00 18.50 2.93 1.20 0.01 0.75 0.02 0.00 0.00 9.75 0.50 0.00 0.00 18.75 2.95 1.21 0.01 1.00 0.03 0.00 0.00 10.00 0.53 0.00 0.00 19.00 2.96 1.22 0.01 1.25 0.04 0.00 0.00 10.25 0.57 0.00 0.00 19.25 2.97 1.23 0.01 1.50 0.05 0.00 0.00 10.50 0.60 0.00 0.00 19.50 2.98 1.23 0.01 1.75 0.06 0.00 0.00 10.75 0.64 0.01 0.00 19.75 2.99 1.24 0.01 2.00 0.06 0.00 0.00 11.00 0.69 0.01 0.00 20.00 3.00 1.25 0.01 2.25 0.07 0.00 0.00 11.25 0.75 0.02 0.00 20.25 3.01 1.26 0.01 2.50 0.08 0.00 0.00 11.50 0.82 0.04 0.01 20.50 3.02 1.27 0.01 2.75 0.09 0.00 0.00 11.75 1.05 0.10 0.01 20.75 3.03 1.27 0.01 3.00 0.10 0.00 0.00 12.00 1.74 0.41 0.04 21.00 3.04 1.28 0.01 3.25 0.11 0.00 0.00 12.25 2.12 0.64 0.16 21.25 3.05 1.29 0.01 3.50 0.12 0.00 0.00 12.50 2.33 0.78 0.18 21.50 3.06 1.29 0.01 3.75 0.13 0.00 0.00 12.75 2.40 0.82 0.12 21.75 3.07 1.30 0.01 4.00 0.14 0.00 0.00 13.00 2.46 0.86 0.07 22.00 3.08 1.31 0.01 4.25 0.15 0.00 0.00 13.25 2.51 0.89 0.04 22.25 3.08 1.31 0.01 4.50 0.16 0.00 0.00 13.50 2.55 0.92 0.03 22.50 3.09 1.32 0.01 4.75 0.17 0.00 0.00 13.75 2.58 0.94 0.02 22.75 3.10 1.33 0.00 5.00 0.18 0.00 0.00 14.00 2.61 0.97 0.02 23.00 3.11 1.33 0.00 5.25 0.20 0.00 0.00 14.25 2.64 0.99 0.02 23.25 3.12 1.34 0.00 5.50 0.21 0.00 0.00 14.50 2.67 1.01 0.02 23.50 3.12 1.34 0.00 5.75 0.22 0.00 0.00 14.75 2.69 1.02 0.01 23.75 3.13 1.35 0.00 6.00 0.23 0.00 0.00 15.00 2.71 1.04 0.01 24.00 3.14 1.36 0.00 6.25 0.25 0.00 0.00 15.25 2.73 1.05 0.01 6.50 0.26 0.00 0.00 15.50 2.75 1.07 0.01 6.75 0.27 0.00 0.00 15.75 2.77 1.08 0.01 7.00 0.29 0.00 0.00 16.00 2.79 1.09 0.01 7.25 0.30 0.00 0.00 16.25 2.81 1.11 0.01 7.50 0.32 0.00 0.00 16.50 2.82 1.12 0.01 7.75 0.33 0.00 0.00 16.75 2.84 1.13 0.01 8.00 0.35 0.00 0.00 17.00 2.85 1.14 0.01 8.25 0.37 0.00 0.00 17.25 2.87 1.15 0.01 8.50 0.39 0.00 0.00 17.50 2.88 1.16 0.01 8.75 0.41 0.00 0.00 17.75 2.90 1.17 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 72 Summary for Subcatchment DA 1: Drainage Area 1 Runoff = 0.29 cfs @ 11.98 hrs, Volume= 0.015 af, Depth> 2.91" Routed to Pond RCVR 1 : RCVR 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.060 98 Paved parking, HSG D 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.6 80 0.0100 0.83 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 1: Drainage Area 1

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 73 Subcatchment DA 1: Drainage Area 1 Hydrograph 0.32 Runoff 0.29 cfs 0.3 extreme_precip_tables_output (29) 24-hr S1 10-yr 0.28 Rainfall=3.14" 0.26 Runoff Area=0.060 ac Runoff Volume=0.015 af 0.24 Runoff Depth>2.91" 0.22 Flow Length=80' Slope=0.0100 '/' 0.2 Tc=1.6 min CN=98 Flow (cfs) 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 74 Hydrograph for Subcatchment DA 1: Drainage Area 1 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.26 0.00 18.00 2.91 2.68 0.00 0.25 0.01 0.00 0.00 9.25 0.45 0.28 0.01 18.25 2.92 2.69 0.00 0.50 0.02 0.00 0.00 9.50 0.48 0.30 0.01 18.50 2.93 2.70 0.00 0.75 0.02 0.00 0.00 9.75 0.50 0.32 0.01 18.75 2.95 2.71 0.00 1.00 0.03 0.00 0.00 10.00 0.53 0.35 0.01 19.00 2.96 2.73 0.00 1.25 0.04 0.00 0.00 10.25 0.57 0.38 0.01 19.25 2.97 2.74 0.00 1.50 0.05 0.00 0.00 10.50 0.60 0.41 0.01 19.50 2.98 2.75 0.00 1.75 0.06 0.00 0.00 10.75 0.64 0.45 0.01 19.75 2.99 2.76 0.00 2.00 0.06 0.00 0.00 11.00 0.69 0.49 0.01 20.00 3.00 2.77 0.00 2.25 0.07 0.00 0.00 11.25 0.75 0.55 0.01 20.25 3.01 2.78 0.00 2.50 0.08 0.01 0.00 11.50 0.82 0.62 0.02 20.50 3.02 2.79 0.00 2.75 0.09 0.01 0.00 11.75 1.05 0.84 0.06 20.75 3.03 2.80 0.00 3.00 0.10 0.01 0.00 12.00 1.74 1.52 0.27 21.00 3.04 2.81 0.00 3.25 0.11 0.02 0.00 12.25 2.12 1.89 0.06 21.25 3.05 2.82 0.00 3.50 0.12 0.02 0.00 12.50 2.33 2.10 0.04 21.50 3.06 2.83 0.00 3.75 0.13 0.03 0.00 12.75 2.40 2.18 0.02 21.75 3.07 2.83 0.00 4.00 0.14 0.03 0.00 13.00 2.46 2.23 0.01 22.00 3.08 2.84 0.00 4.25 0.15 0.04 0.00 13.25 2.51 2.28 0.01 22.25 3.08 2.85 0.00 4.50 0.16 0.04 0.00 13.50 2.55 2.32 0.01 22.50 3.09 2.86 0.00 4.75 0.17 0.05 0.00 13.75 2.58 2.35 0.01 22.75 3.10 2.87 0.00 5.00 0.18 0.06 0.00 14.00 2.61 2.38 0.01 23.00 3.11 2.88 0.00 5.25 0.20 0.07 0.00 14.25 2.64 2.41 0.01 23.25 3.12 2.88 0.00 5.50 0.21 0.07 0.00 14.50 2.67 2.44 0.01 23.50 3.12 2.89 0.00 5.75 0.22 0.08 0.00 14.75 2.69 2.46 0.01 23.75 3.13 2.90 0.00 6.00 0.23 0.09 0.00 15.00 2.71 2.48 0.01 24.00 3.14 2.91 0.00 6.25 0.25 0.10 0.00 15.25 2.73 2.50 0.00 6.50 0.26 0.11 0.00 15.50 2.75 2.52 0.00 6.75 0.27 0.12 0.00 15.75 2.77 2.54 0.00 7.00 0.29 0.13 0.00 16.00 2.79 2.56 0.00 7.25 0.30 0.15 0.00 16.25 2.81 2.58 0.00 7.50 0.32 0.16 0.00 16.50 2.82 2.59 0.00 7.75 0.33 0.17 0.00 16.75 2.84 2.61 0.00 8.00 0.35 0.19 0.00 17.00 2.85 2.62 0.00 8.25 0.37 0.20 0.00 17.25 2.87 2.64 0.00 8.50 0.39 0.22 0.00 17.50 2.88 2.65 0.00 8.75 0.41 0.24 0.00 17.75 2.90 2.66 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 75 Summary for Subcatchment DA 2: Drainage Area 2 Runoff = 0.05 cfs @ 11.96 hrs, Volume= 0.002 af, Depth> 2.91" Routed to Pond RCVR 2 : RCVR 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.010 98 Paved parking, HSG D 0.010 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.8 35 0.0100 0.70 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 2: Drainage Area 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 76 Subcatchment DA 2: Drainage Area 2 Hydrograph Runoff 0.05 cfs 0.05 extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" 0.045 Runoff Area=0.010 ac Runoff Volume=0.002 af 0.04 Runoff Depth>2.91" Flow Length=35' 0.035 Slope=0.0100 '/' Tc=0.8 min CN=98 Flow (cfs) 0.03 0.025 0.02 0.015 0.01 0.005 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 77 Hydrograph for Subcatchment DA 2: Drainage Area 2 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.26 0.00 18.00 2.91 2.68 0.00 0.25 0.01 0.00 0.00 9.25 0.45 0.28 0.00 18.25 2.92 2.69 0.00 0.50 0.02 0.00 0.00 9.50 0.48 0.30 0.00 18.50 2.93 2.70 0.00 0.75 0.02 0.00 0.00 9.75 0.50 0.32 0.00 18.75 2.95 2.71 0.00 1.00 0.03 0.00 0.00 10.00 0.53 0.35 0.00 19.00 2.96 2.73 0.00 1.25 0.04 0.00 0.00 10.25 0.57 0.38 0.00 19.25 2.97 2.74 0.00 1.50 0.05 0.00 0.00 10.50 0.60 0.41 0.00 19.50 2.98 2.75 0.00 1.75 0.06 0.00 0.00 10.75 0.64 0.45 0.00 19.75 2.99 2.76 0.00 2.00 0.06 0.00 0.00 11.00 0.69 0.49 0.00 20.00 3.00 2.77 0.00 2.25 0.07 0.00 0.00 11.25 0.75 0.55 0.00 20.25 3.01 2.78 0.00 2.50 0.08 0.01 0.00 11.50 0.82 0.62 0.00 20.50 3.02 2.79 0.00 2.75 0.09 0.01 0.00 11.75 1.05 0.84 0.01 20.75 3.03 2.80 0.00 3.00 0.10 0.01 0.00 12.00 1.74 1.52 0.04 21.00 3.04 2.81 0.00 3.25 0.11 0.02 0.00 12.25 2.12 1.89 0.01 21.25 3.05 2.82 0.00 3.50 0.12 0.02 0.00 12.50 2.33 2.10 0.01 21.50 3.06 2.83 0.00 3.75 0.13 0.03 0.00 12.75 2.40 2.18 0.00 21.75 3.07 2.83 0.00 4.00 0.14 0.03 0.00 13.00 2.46 2.23 0.00 22.00 3.08 2.84 0.00 4.25 0.15 0.04 0.00 13.25 2.51 2.28 0.00 22.25 3.08 2.85 0.00 4.50 0.16 0.04 0.00 13.50 2.55 2.32 0.00 22.50 3.09 2.86 0.00 4.75 0.17 0.05 0.00 13.75 2.58 2.35 0.00 22.75 3.10 2.87 0.00 5.00 0.18 0.06 0.00 14.00 2.61 2.38 0.00 23.00 3.11 2.88 0.00 5.25 0.20 0.07 0.00 14.25 2.64 2.41 0.00 23.25 3.12 2.88 0.00 5.50 0.21 0.07 0.00 14.50 2.67 2.44 0.00 23.50 3.12 2.89 0.00 5.75 0.22 0.08 0.00 14.75 2.69 2.46 0.00 23.75 3.13 2.90 0.00 6.00 0.23 0.09 0.00 15.00 2.71 2.48 0.00 24.00 3.14 2.91 0.00 6.25 0.25 0.10 0.00 15.25 2.73 2.50 0.00 6.50 0.26 0.11 0.00 15.50 2.75 2.52 0.00 6.75 0.27 0.12 0.00 15.75 2.77 2.54 0.00 7.00 0.29 0.13 0.00 16.00 2.79 2.56 0.00 7.25 0.30 0.15 0.00 16.25 2.81 2.58 0.00 7.50 0.32 0.16 0.00 16.50 2.82 2.59 0.00 7.75 0.33 0.17 0.00 16.75 2.84 2.61 0.00 8.00 0.35 0.19 0.00 17.00 2.85 2.62 0.00 8.25 0.37 0.20 0.00 17.25 2.87 2.64 0.00 8.50 0.39 0.22 0.00 17.50 2.88 2.65 0.00 8.75 0.41 0.24 0.00 17.75 2.90 2.66 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 78 Summary for Subcatchment DA 3: Drainage Area 3 Runoff = 0.57 cfs @ 12.05 hrs, Volume= 0.035 af, Depth> 2.79" Routed to Pond RCVR 3 : RCVR 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.140 98 Paved parking, HSG D 0.010 80 >75% Grass cover, Good, HSG D 0.150 97 Weighted Average 0.010 6.67% Pervious Area 0.140 93.33% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 19 0.0100 0.05 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 1.2 56 0.0100 0.77 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" 7.2 75 Total Subcatchment DA 3: Drainage Area 3

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 79 Subcatchment DA 3: Drainage Area 3 Hydrograph Runoff 0.6 0.57 cfs extreme_precip_tables_output (29) 24-hr S1 10-yr 0.55 Rainfall=3.14" Runoff Area=0.150 ac 0.5 Runoff Volume=0.035 af Runoff Depth>2.79" 0.45 Flow Length=75' Slope=0.0100 '/' 0.4 Tc=7.2 min CN=97 Flow (cfs) 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 80 Hydrograph for Subcatchment DA 3: Drainage Area 3 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.20 0.01 18.00 2.91 2.57 0.01 0.25 0.01 0.00 0.00 9.25 0.45 0.22 0.01 18.25 2.92 2.58 0.01 0.50 0.02 0.00 0.00 9.50 0.48 0.24 0.01 18.50 2.93 2.59 0.01 0.75 0.02 0.00 0.00 9.75 0.50 0.26 0.01 18.75 2.95 2.60 0.01 1.00 0.03 0.00 0.00 10.00 0.53 0.28 0.01 19.00 2.96 2.62 0.01 1.25 0.04 0.00 0.00 10.25 0.57 0.31 0.02 19.25 2.97 2.63 0.01 1.50 0.05 0.00 0.00 10.50 0.60 0.34 0.02 19.50 2.98 2.64 0.01 1.75 0.06 0.00 0.00 10.75 0.64 0.38 0.02 19.75 2.99 2.65 0.01 2.00 0.06 0.00 0.00 11.00 0.69 0.42 0.03 20.00 3.00 2.66 0.01 2.25 0.07 0.00 0.00 11.25 0.75 0.47 0.03 20.25 3.01 2.67 0.01 2.50 0.08 0.00 0.00 11.50 0.82 0.54 0.04 20.50 3.02 2.68 0.01 2.75 0.09 0.00 0.00 11.75 1.05 0.76 0.13 20.75 3.03 2.69 0.01 3.00 0.10 0.00 0.00 12.00 1.74 1.42 0.45 21.00 3.04 2.70 0.01 3.25 0.11 0.01 0.00 12.25 2.12 1.79 0.21 21.25 3.05 2.71 0.01 3.50 0.12 0.01 0.00 12.50 2.33 2.00 0.12 21.50 3.06 2.72 0.01 3.75 0.13 0.01 0.00 12.75 2.40 2.07 0.04 21.75 3.07 2.72 0.01 4.00 0.14 0.02 0.00 13.00 2.46 2.12 0.03 22.00 3.08 2.73 0.01 4.25 0.15 0.02 0.00 13.25 2.51 2.17 0.03 22.25 3.08 2.74 0.01 4.50 0.16 0.02 0.00 13.50 2.55 2.21 0.02 22.50 3.09 2.75 0.01 4.75 0.17 0.03 0.00 13.75 2.58 2.24 0.02 22.75 3.10 2.76 0.00 5.00 0.18 0.03 0.00 14.00 2.61 2.27 0.02 23.00 3.11 2.77 0.00 5.25 0.20 0.04 0.00 14.25 2.64 2.30 0.02 23.25 3.12 2.77 0.00 5.50 0.21 0.05 0.00 14.50 2.67 2.33 0.02 23.50 3.12 2.78 0.00 5.75 0.22 0.05 0.00 14.75 2.69 2.35 0.01 23.75 3.13 2.79 0.00 6.00 0.23 0.06 0.00 15.00 2.71 2.37 0.01 24.00 3.14 2.80 0.00 6.25 0.25 0.07 0.00 15.25 2.73 2.39 0.01 6.50 0.26 0.08 0.01 15.50 2.75 2.41 0.01 6.75 0.27 0.09 0.01 15.75 2.77 2.43 0.01 7.00 0.29 0.10 0.01 16.00 2.79 2.45 0.01 7.25 0.30 0.11 0.01 16.25 2.81 2.47 0.01 7.50 0.32 0.12 0.01 16.50 2.82 2.48 0.01 7.75 0.33 0.13 0.01 16.75 2.84 2.50 0.01 8.00 0.35 0.14 0.01 17.00 2.85 2.51 0.01 8.25 0.37 0.15 0.01 17.25 2.87 2.53 0.01 8.50 0.39 0.17 0.01 17.50 2.88 2.54 0.01 8.75 0.41 0.18 0.01 17.75 2.90 2.56 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 81 Summary for Subcatchment DA 4: Drainage Area 4 Runoff = 0.31 cfs @ 12.04 hrs, Volume= 0.018 af, Depth> 2.69" Routed to Pond RCVR 4 : RCVR 4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.070 98 Paved parking, HSG D 0.010 80 >75% Grass cover, Good, HSG D 0.080 96 Weighted Average 0.010 12.50% Pervious Area 0.070 87.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 20 0.0100 0.05 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment DA 4: Drainage Area 4

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 82 Subcatchment DA 4: Drainage Area 4 Hydrograph 0.34 Runoff 0.31 cfs 0.32 extreme_precip_tables_output (29) 24-hr S1 10-yr 0.3 Rainfall=3.14" 0.28 Runoff Area=0.080 ac Runoff Volume=0.018 af 0.26 Runoff Depth>2.69" 0.24 Flow Length=20' 0.22 Slope=0.0100 '/' Tc=6.3 min 0.2 CN=96 Flow (cfs) 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 83 Hydrograph for Subcatchment DA 4: Drainage Area 4 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.16 0.00 18.00 2.91 2.46 0.00 0.25 0.01 0.00 0.00 9.25 0.45 0.17 0.01 18.25 2.92 2.47 0.00 0.50 0.02 0.00 0.00 9.50 0.48 0.19 0.01 18.50 2.93 2.49 0.00 0.75 0.02 0.00 0.00 9.75 0.50 0.21 0.01 18.75 2.95 2.50 0.00 1.00 0.03 0.00 0.00 10.00 0.53 0.23 0.01 19.00 2.96 2.51 0.00 1.25 0.04 0.00 0.00 10.25 0.57 0.26 0.01 19.25 2.97 2.52 0.00 1.50 0.05 0.00 0.00 10.50 0.60 0.29 0.01 19.50 2.98 2.53 0.00 1.75 0.06 0.00 0.00 10.75 0.64 0.32 0.01 19.75 2.99 2.54 0.00 2.00 0.06 0.00 0.00 11.00 0.69 0.36 0.01 20.00 3.00 2.55 0.00 2.25 0.07 0.00 0.00 11.25 0.75 0.41 0.02 20.25 3.01 2.56 0.00 2.50 0.08 0.00 0.00 11.50 0.82 0.47 0.02 20.50 3.02 2.57 0.00 2.75 0.09 0.00 0.00 11.75 1.05 0.68 0.07 20.75 3.03 2.58 0.00 3.00 0.10 0.00 0.00 12.00 1.74 1.33 0.26 21.00 3.04 2.59 0.00 3.25 0.11 0.00 0.00 12.25 2.12 1.69 0.11 21.25 3.05 2.60 0.00 3.50 0.12 0.00 0.00 12.50 2.33 1.90 0.06 21.50 3.06 2.61 0.00 3.75 0.13 0.00 0.00 12.75 2.40 1.97 0.02 21.75 3.07 2.62 0.00 4.00 0.14 0.01 0.00 13.00 2.46 2.02 0.02 22.00 3.08 2.63 0.00 4.25 0.15 0.01 0.00 13.25 2.51 2.07 0.01 22.25 3.08 2.63 0.00 4.50 0.16 0.01 0.00 13.50 2.55 2.11 0.01 22.50 3.09 2.64 0.00 4.75 0.17 0.02 0.00 13.75 2.58 2.14 0.01 22.75 3.10 2.65 0.00 5.00 0.18 0.02 0.00 14.00 2.61 2.17 0.01 23.00 3.11 2.66 0.00 5.25 0.20 0.02 0.00 14.25 2.64 2.20 0.01 23.25 3.12 2.67 0.00 5.50 0.21 0.03 0.00 14.50 2.67 2.22 0.01 23.50 3.12 2.67 0.00 5.75 0.22 0.03 0.00 14.75 2.69 2.25 0.01 23.75 3.13 2.68 0.00 6.00 0.23 0.04 0.00 15.00 2.71 2.27 0.01 24.00 3.14 2.69 0.00 6.25 0.25 0.05 0.00 15.25 2.73 2.29 0.01 6.50 0.26 0.05 0.00 15.50 2.75 2.31 0.01 6.75 0.27 0.06 0.00 15.75 2.77 2.33 0.01 7.00 0.29 0.07 0.00 16.00 2.79 2.35 0.01 7.25 0.30 0.08 0.00 16.25 2.81 2.36 0.01 7.50 0.32 0.08 0.00 16.50 2.82 2.38 0.01 7.75 0.33 0.09 0.00 16.75 2.84 2.39 0.00 8.00 0.35 0.11 0.00 17.00 2.85 2.41 0.00 8.25 0.37 0.12 0.00 17.25 2.87 2.42 0.00 8.50 0.39 0.13 0.00 17.50 2.88 2.44 0.00 8.75 0.41 0.14 0.00 17.75 2.90 2.45 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 84 Summary for Subcatchment DA 5: Drainage Area 5 Runoff = 0.24 cfs @ 11.98 hrs, Volume= 0.012 af, Depth> 2.91" Routed to Pond RCVR 5 : RCVR 5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.050 98 Paved parking, HSG D 0.050 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.7 60 0.0050 0.59 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 5: Drainage Area 5

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 85 Subcatchment DA 5: Drainage Area 5 Hydrograph Runoff 0.26 0.24 cfs 0.24 extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" 0.22 Runoff Area=0.050 ac Runoff Volume=0.012 af 0.2 Runoff Depth>2.91" Flow Length=60' 0.18 Slope=0.0050 '/' Tc=1.7 min 0.16 CN=98 Flow (cfs) 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 86 Hydrograph for Subcatchment DA 5: Drainage Area 5 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.26 0.00 18.00 2.91 2.68 0.00 0.25 0.01 0.00 0.00 9.25 0.45 0.28 0.00 18.25 2.92 2.69 0.00 0.50 0.02 0.00 0.00 9.50 0.48 0.30 0.00 18.50 2.93 2.70 0.00 0.75 0.02 0.00 0.00 9.75 0.50 0.32 0.01 18.75 2.95 2.71 0.00 1.00 0.03 0.00 0.00 10.00 0.53 0.35 0.01 19.00 2.96 2.73 0.00 1.25 0.04 0.00 0.00 10.25 0.57 0.38 0.01 19.25 2.97 2.74 0.00 1.50 0.05 0.00 0.00 10.50 0.60 0.41 0.01 19.50 2.98 2.75 0.00 1.75 0.06 0.00 0.00 10.75 0.64 0.45 0.01 19.75 2.99 2.76 0.00 2.00 0.06 0.00 0.00 11.00 0.69 0.49 0.01 20.00 3.00 2.77 0.00 2.25 0.07 0.00 0.00 11.25 0.75 0.55 0.01 20.25 3.01 2.78 0.00 2.50 0.08 0.01 0.00 11.50 0.82 0.62 0.02 20.50 3.02 2.79 0.00 2.75 0.09 0.01 0.00 11.75 1.05 0.84 0.05 20.75 3.03 2.80 0.00 3.00 0.10 0.01 0.00 12.00 1.74 1.52 0.23 21.00 3.04 2.81 0.00 3.25 0.11 0.02 0.00 12.25 2.12 1.89 0.05 21.25 3.05 2.82 0.00 3.50 0.12 0.02 0.00 12.50 2.33 2.10 0.04 21.50 3.06 2.83 0.00 3.75 0.13 0.03 0.00 12.75 2.40 2.18 0.01 21.75 3.07 2.83 0.00 4.00 0.14 0.03 0.00 13.00 2.46 2.23 0.01 22.00 3.08 2.84 0.00 4.25 0.15 0.04 0.00 13.25 2.51 2.28 0.01 22.25 3.08 2.85 0.00 4.50 0.16 0.04 0.00 13.50 2.55 2.32 0.01 22.50 3.09 2.86 0.00 4.75 0.17 0.05 0.00 13.75 2.58 2.35 0.01 22.75 3.10 2.87 0.00 5.00 0.18 0.06 0.00 14.00 2.61 2.38 0.01 23.00 3.11 2.88 0.00 5.25 0.20 0.07 0.00 14.25 2.64 2.41 0.01 23.25 3.12 2.88 0.00 5.50 0.21 0.07 0.00 14.50 2.67 2.44 0.01 23.50 3.12 2.89 0.00 5.75 0.22 0.08 0.00 14.75 2.69 2.46 0.00 23.75 3.13 2.90 0.00 6.00 0.23 0.09 0.00 15.00 2.71 2.48 0.00 24.00 3.14 2.91 0.00 6.25 0.25 0.10 0.00 15.25 2.73 2.50 0.00 6.50 0.26 0.11 0.00 15.50 2.75 2.52 0.00 6.75 0.27 0.12 0.00 15.75 2.77 2.54 0.00 7.00 0.29 0.13 0.00 16.00 2.79 2.56 0.00 7.25 0.30 0.15 0.00 16.25 2.81 2.58 0.00 7.50 0.32 0.16 0.00 16.50 2.82 2.59 0.00 7.75 0.33 0.17 0.00 16.75 2.84 2.61 0.00 8.00 0.35 0.19 0.00 17.00 2.85 2.62 0.00 8.25 0.37 0.20 0.00 17.25 2.87 2.64 0.00 8.50 0.39 0.22 0.00 17.50 2.88 2.65 0.00 8.75 0.41 0.24 0.00 17.75 2.90 2.66 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 87 Summary for Subcatchment DA 6: Drainage Area 6 Runoff = 0.31 cfs @ 12.16 hrs, Volume= 0.023 af, Depth> 1.86" Routed to Pond SWALE : SWALE Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Area (ac) CN Description 0.060 98 Paved parking, HSG D 0.090 80 >75% Grass cover, Good, HSG D 0.150 87 Weighted Average 0.090 60.00% Pervious Area 0.060 40.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 40 0.0045 0.04 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment DA 6: Drainage Area 6

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 88 Subcatchment DA 6: Drainage Area 6 Hydrograph 0.34 Runoff 0.32 0.31 cfs extreme_precip_tables_output (29) 24-hr S1 10-yr 0.3 Rainfall=3.14" 0.28 Runoff Area=0.150 ac Runoff Volume=0.023 af 0.26 Runoff Depth>1.86" 0.24 Flow Length=40' 0.22 Slope=0.0045 '/' Tc=15.0 min 0.2 CN=87 Flow (cfs) 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 89 Hydrograph for Subcatchment DA 6: Drainage Area 6 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.43 0.01 0.00 18.00 2.91 1.66 0.01 0.25 0.01 0.00 0.00 9.25 0.45 0.01 0.00 18.25 2.92 1.67 0.01 0.50 0.02 0.00 0.00 9.50 0.48 0.02 0.00 18.50 2.93 1.68 0.01 0.75 0.02 0.00 0.00 9.75 0.50 0.02 0.00 18.75 2.95 1.69 0.01 1.00 0.03 0.00 0.00 10.00 0.53 0.03 0.00 19.00 2.96 1.70 0.01 1.25 0.04 0.00 0.00 10.25 0.57 0.04 0.00 19.25 2.97 1.71 0.01 1.50 0.05 0.00 0.00 10.50 0.60 0.05 0.01 19.50 2.98 1.72 0.01 1.75 0.06 0.00 0.00 10.75 0.64 0.06 0.01 19.75 2.99 1.73 0.01 2.00 0.06 0.00 0.00 11.00 0.69 0.08 0.01 20.00 3.00 1.74 0.01 2.25 0.07 0.00 0.00 11.25 0.75 0.10 0.01 20.25 3.01 1.75 0.01 2.50 0.08 0.00 0.00 11.50 0.82 0.14 0.02 20.50 3.02 1.76 0.01 2.75 0.09 0.00 0.00 11.75 1.05 0.25 0.05 20.75 3.03 1.77 0.01 3.00 0.10 0.00 0.00 12.00 1.74 0.71 0.13 21.00 3.04 1.77 0.01 3.25 0.11 0.00 0.00 12.25 2.12 1.00 0.26 21.25 3.05 1.78 0.00 3.50 0.12 0.00 0.00 12.50 2.33 1.17 0.13 21.50 3.06 1.79 0.00 3.75 0.13 0.00 0.00 12.75 2.40 1.23 0.06 21.75 3.07 1.80 0.00 4.00 0.14 0.00 0.00 13.00 2.46 1.28 0.03 22.00 3.08 1.81 0.00 4.25 0.15 0.00 0.00 13.25 2.51 1.32 0.03 22.25 3.08 1.81 0.00 4.50 0.16 0.00 0.00 13.50 2.55 1.35 0.02 22.50 3.09 1.82 0.00 4.75 0.17 0.00 0.00 13.75 2.58 1.38 0.02 22.75 3.10 1.83 0.00 5.00 0.18 0.00 0.00 14.00 2.61 1.40 0.02 23.00 3.11 1.83 0.00 5.25 0.20 0.00 0.00 14.25 2.64 1.43 0.02 23.25 3.12 1.84 0.00 5.50 0.21 0.00 0.00 14.50 2.67 1.45 0.01 23.50 3.12 1.85 0.00 5.75 0.22 0.00 0.00 14.75 2.69 1.47 0.01 23.75 3.13 1.86 0.00 6.00 0.23 0.00 0.00 15.00 2.71 1.49 0.01 24.00 3.14 1.86 0.00 6.25 0.25 0.00 0.00 15.25 2.73 1.51 0.01 6.50 0.26 0.00 0.00 15.50 2.75 1.53 0.01 6.75 0.27 0.00 0.00 15.75 2.77 1.54 0.01 7.00 0.29 0.00 0.00 16.00 2.79 1.56 0.01 7.25 0.30 0.00 0.00 16.25 2.81 1.57 0.01 7.50 0.32 0.00 0.00 16.50 2.82 1.59 0.01 7.75 0.33 0.00 0.00 16.75 2.84 1.60 0.01 8.00 0.35 0.00 0.00 17.00 2.85 1.61 0.01 8.25 0.37 0.00 0.00 17.25 2.87 1.62 0.01 8.50 0.39 0.01 0.00 17.50 2.88 1.64 0.01 8.75 0.41 0.01 0.00 17.75 2.90 1.65 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 90 Summary for Pond EX RCVR: EX RCVR Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 2.26" for 10-yr event Inflow = 0.87 cfs @ 12.06 hrs, Volume= 0.094 af Outflow = 0.87 cfs @ 12.06 hrs, Volume= 0.094 af, Atten= 0%, Lag= 0.0 min Primary = 0.87 cfs @ 12.06 hrs, Volume= 0.094 af Routed to Link POST : Post Development Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.21' @ 12.06 hrs Device Routing Invert Outlet Devices #1 Primary 899.60' 12.0" Round 12" HDPE L= 121.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 899.60' / 899.23' S= 0.0031 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf Primary OutFlow Max=0.86 cfs @ 12.06 hrs HW=900.21' TW=0.00' (Dynamic Tailwater) 1=12" HDPE (Barrel Controls 0.86 cfs @ 2.45 fps) Pond EX RCVR: EX RCVR 12" HDPE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 91 Pond EX RCVR: EX RCVR Hydrograph Inflow 0.87 cfs Primary 0.95 0.87 cfs 0.9 0.85 Inflow Area=0.500 ac 0.8 0.75 Peak Elev=900.21' 0.7 12.0" 0.65 0.6 Round Culvert Flow (cfs) 0.55 0.5 n=0.013 0.45 0.4 L=121.0' 0.35 0.3 S=0.0031 '/' 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 92 Pond EX RCVR: EX RCVR Stage-Discharge Primary Elevation (feet) 900 12" HDPE 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 93 Pond EX RCVR: EX RCVR Stage-Area-Storage Storage Elevation (feet) 900 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 94 Hydrograph for Pond EX RCVR: EX RCVR Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 899.60 0.00 9.00 0.02 899.68 0.02 18.00 0.03 899.71 0.03 0.25 0.00 899.60 0.00 9.25 0.02 899.69 0.02 18.25 0.03 899.71 0.03 0.50 0.00 899.60 0.00 9.50 0.02 899.69 0.02 18.50 0.02 899.70 0.02 0.75 0.00 899.60 0.00 9.75 0.02 899.69 0.02 18.75 0.02 899.70 0.02 1.00 0.00 899.60 0.00 10.00 0.02 899.70 0.02 19.00 0.02 899.70 0.02 1.25 0.00 899.60 0.00 10.25 0.03 899.71 0.03 19.25 0.02 899.70 0.02 1.50 0.00 899.61 0.00 10.50 0.03 899.71 0.03 19.50 0.02 899.70 0.02 1.75 0.00 899.61 0.00 10.75 0.03 899.72 0.03 19.75 0.02 899.70 0.02 2.00 0.00 899.62 0.00 11.00 0.04 899.73 0.04 20.00 0.02 899.70 0.02 2.25 0.00 899.62 0.00 11.25 0.05 899.74 0.05 20.25 0.02 899.70 0.02 2.50 0.00 899.63 0.00 11.50 0.07 899.77 0.07 20.50 0.02 899.69 0.02 2.75 0.00 899.63 0.00 11.75 0.20 899.89 0.20 20.75 0.02 899.69 0.02 3.00 0.00 899.63 0.00 12.00 0.76 900.17 0.76 21.00 0.02 899.69 0.02 3.25 0.00 899.64 0.00 12.25 0.64 900.12 0.64 21.25 0.02 899.69 0.02 3.50 0.00 899.64 0.00 12.50 0.51 900.06 0.51 21.50 0.02 899.69 0.02 3.75 0.00 899.64 0.00 12.75 0.30 899.95 0.30 21.75 0.02 899.69 0.02 4.00 0.00 899.64 0.00 13.00 0.19 899.88 0.19 22.00 0.02 899.69 0.02 4.25 0.00 899.65 0.00 13.25 0.14 899.84 0.14 22.25 0.02 899.69 0.02 4.50 0.00 899.65 0.00 13.50 0.11 899.81 0.11 22.50 0.02 899.69 0.02 4.75 0.00 899.65 0.00 13.75 0.09 899.79 0.09 22.75 0.02 899.69 0.02 5.00 0.01 899.65 0.01 14.00 0.07 899.78 0.07 23.00 0.02 899.69 0.02 5.25 0.01 899.65 0.01 14.25 0.07 899.77 0.07 23.25 0.02 899.68 0.02 5.50 0.01 899.65 0.01 14.50 0.06 899.76 0.06 23.50 0.02 899.68 0.02 5.75 0.01 899.66 0.01 14.75 0.05 899.75 0.05 23.75 0.02 899.68 0.02 6.00 0.01 899.66 0.01 15.00 0.05 899.74 0.05 24.00 0.01 899.68 0.01 6.25 0.01 899.66 0.01 15.25 0.05 899.74 0.05 6.50 0.01 899.66 0.01 15.50 0.04 899.73 0.04 6.75 0.01 899.66 0.01 15.75 0.04 899.73 0.04 7.00 0.01 899.67 0.01 16.00 0.04 899.73 0.04 7.25 0.01 899.67 0.01 16.25 0.04 899.72 0.04 7.50 0.01 899.67 0.01 16.50 0.03 899.72 0.03 7.75 0.01 899.67 0.01 16.75 0.03 899.72 0.03 8.00 0.01 899.67 0.01 17.00 0.03 899.72 0.03 8.25 0.01 899.68 0.01 17.25 0.03 899.71 0.03 8.50 0.01 899.68 0.01 17.50 0.03 899.71 0.03 8.75 0.01 899.68 0.01 17.75 0.03 899.71 0.03

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 95 Summary for Pond RCVR 1: RCVR 1 Inflow Area = 0.340 ac, 70.59% Impervious, Inflow Depth > 2.01" for 10-yr event Inflow = 0.43 cfs @ 12.30 hrs, Volume= 0.057 af Outflow = 0.43 cfs @ 12.30 hrs, Volume= 0.057 af, Atten= 0%, Lag= 0.0 min Primary = 0.43 cfs @ 12.30 hrs, Volume= 0.057 af Routed to Pond RCVR 2 : RCVR 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.10' @ 12.22 hrs Device Routing Invert Outlet Devices #1 Primary 900.56' 8.0" Round RCVR 1 to RCVR 2 L= 59.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.56' / 900.32' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.44 cfs @ 12.30 hrs HW=901.09' TW=900.83' (Dynamic Tailwater) 1=RCVR 1 to RCVR 2 (Outlet Controls 0.44 cfs @ 2.01 fps) Pond RCVR 1: RCVR 1 RCVR 1 to RCVR 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 96 Pond RCVR 1: RCVR 1 Hydrograph Inflow 0.43 cfs Primary 0.46 0.43 cfs 0.44 0.42 Inflow Area=0.340 ac 0.4 0.38 Peak Elev=901.10' 0.36 0.34 8.0" 0.32 0.3 0.28 Round Culvert Flow (cfs) 0.26 0.24 n=0.013 0.22 0.2 L=59.0' 0.18 0.16 0.14 S=0.0041 '/' 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 97 Pond RCVR 1: RCVR 1 Stage-Discharge Primary 901.2 901.15 901.1 901.05 901 Elevation (feet) 900.95 900.9 900.85 900.8 900.75 900.7 900.65 900.6 RCVR 1 to RCVR 2 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 98 Pond RCVR 1: RCVR 1 Stage-Area-Storage Storage 901.2 901.15 901.1 901.05 901 Elevation (feet) 900.95 900.9 900.85 900.8 900.75 900.7 900.65 900.6 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 99 Hydrograph for Pond RCVR 1: RCVR 1 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.56 0.00 9.00 0.00 900.61 0.00 18.00 0.02 900.66 0.02 0.25 0.00 900.56 0.00 9.25 0.01 900.61 0.01 18.25 0.02 900.65 0.02 0.50 0.00 900.56 0.00 9.50 0.01 900.62 0.01 18.50 0.02 900.65 0.02 0.75 0.00 900.56 0.00 9.75 0.01 900.62 0.01 18.75 0.02 900.65 0.02 1.00 0.00 900.56 0.00 10.00 0.01 900.62 0.01 19.00 0.02 900.65 0.02 1.25 0.00 900.56 0.00 10.25 0.01 900.62 0.01 19.25 0.02 900.65 0.02 1.50 0.00 900.57 0.00 10.50 0.01 900.63 0.01 19.50 0.02 900.65 0.02 1.75 0.00 900.57 0.00 10.75 0.01 900.63 0.01 19.75 0.01 900.65 0.01 2.00 0.00 900.58 0.00 11.00 0.01 900.64 0.01 20.00 0.01 900.65 0.01 2.25 0.00 900.58 0.00 11.25 0.01 900.65 0.01 20.25 0.01 900.64 0.01 2.50 0.00 900.58 0.00 11.50 0.02 900.67 0.02 20.50 0.01 900.64 0.01 2.75 0.00 900.58 0.00 11.75 0.06 900.75 0.06 20.75 0.01 900.64 0.01 3.00 0.00 900.58 0.00 12.00 0.27 900.99 0.27 21.00 0.01 900.64 0.01 3.25 0.00 900.58 0.00 12.25 0.42 901.10 0.42 21.25 0.01 900.64 0.01 3.50 0.00 900.59 0.00 12.50 0.37 901.04 0.37 21.50 0.01 900.64 0.01 3.75 0.00 900.59 0.00 12.75 0.25 900.93 0.25 21.75 0.01 900.64 0.01 4.00 0.00 900.59 0.00 13.00 0.16 900.85 0.16 22.00 0.01 900.64 0.01 4.25 0.00 900.59 0.00 13.25 0.11 900.80 0.11 22.25 0.01 900.64 0.01 4.50 0.00 900.59 0.00 13.50 0.08 900.76 0.08 22.50 0.01 900.64 0.01 4.75 0.00 900.59 0.00 13.75 0.07 900.74 0.07 22.75 0.01 900.64 0.01 5.00 0.00 900.59 0.00 14.00 0.06 900.73 0.06 23.00 0.01 900.64 0.01 5.25 0.00 900.59 0.00 14.25 0.05 900.71 0.05 23.25 0.01 900.63 0.01 5.50 0.00 900.59 0.00 14.50 0.04 900.70 0.04 23.50 0.01 900.63 0.01 5.75 0.00 900.60 0.00 14.75 0.04 900.70 0.04 23.75 0.01 900.63 0.01 6.00 0.00 900.60 0.00 15.00 0.03 900.69 0.03 24.00 0.01 900.63 0.01 6.25 0.00 900.60 0.00 15.25 0.03 900.69 0.03 6.50 0.00 900.60 0.00 15.50 0.03 900.68 0.03 6.75 0.00 900.60 0.00 15.75 0.03 900.68 0.03 7.00 0.00 900.60 0.00 16.00 0.03 900.67 0.03 7.25 0.00 900.60 0.00 16.25 0.02 900.67 0.02 7.50 0.00 900.60 0.00 16.50 0.02 900.67 0.02 7.75 0.00 900.60 0.00 16.75 0.02 900.67 0.02 8.00 0.00 900.60 0.00 17.00 0.02 900.66 0.02 8.25 0.00 900.61 0.00 17.25 0.02 900.66 0.02 8.50 0.00 900.61 0.00 17.50 0.02 900.66 0.02 8.75 0.00 900.61 0.00 17.75 0.02 900.66 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 100 Summary for Pond RCVR 2: RCVR 2 Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 2.26" for 10-yr event Inflow = 0.87 cfs @ 12.06 hrs, Volume= 0.094 af Outflow = 0.87 cfs @ 12.06 hrs, Volume= 0.094 af, Atten= 0%, Lag= 0.0 min Primary = 0.87 cfs @ 12.06 hrs, Volume= 0.094 af Routed to Pond EX RCVR : EX RCVR Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.95' @ 12.07 hrs Device Routing Invert Outlet Devices #1 Primary 900.32' 8.0" Round RCVR 2 to EX RCVR L= 72.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.32' / 899.60' S= 0.0100 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.84 cfs @ 12.06 hrs HW=900.94' TW=900.21' (Dynamic Tailwater) 1=RCVR 2 to EX RCVR (Outlet Controls 0.84 cfs @ 3.21 fps) Pond RCVR 2: RCVR 2 RCVR 2 to EX RCVR

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 101 Pond RCVR 2: RCVR 2 Hydrograph Inflow 0.87 cfs Primary 0.95 0.87 cfs 0.9 0.85 Inflow Area=0.500 ac 0.8 0.75 Peak Elev=900.95' 0.7 8.0" 0.65 0.6 Round Culvert Flow (cfs) 0.55 0.5 n=0.013 0.45 0.4 L=72.0' 0.35 0.3 S=0.0100 '/' 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 102 Pond RCVR 2: RCVR 2 Stage-Discharge Primary 900.95 900.9 900.85 900.8 900.75 Elevation (feet) 900.7 900.65 900.6 900.55 900.5 900.45 900.4 900.35 RCVR 2 to EX RCVR 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 103 Pond RCVR 2: RCVR 2 Stage-Area-Storage Storage 900.95 900.9 900.85 900.8 900.75 Elevation (feet) 900.7 900.65 900.6 900.55 900.5 900.45 900.4 900.35 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 104 Hydrograph for Pond RCVR 2: RCVR 2 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.32 0.00 9.00 0.02 900.39 0.02 18.00 0.03 900.41 0.03 0.25 0.00 900.32 0.00 9.25 0.02 900.39 0.02 18.25 0.03 900.41 0.03 0.50 0.00 900.32 0.00 9.50 0.02 900.40 0.02 18.50 0.02 900.41 0.02 0.75 0.00 900.32 0.00 9.75 0.02 900.40 0.02 18.75 0.02 900.41 0.02 1.00 0.00 900.32 0.00 10.00 0.02 900.41 0.02 19.00 0.02 900.41 0.02 1.25 0.00 900.32 0.00 10.25 0.03 900.41 0.03 19.25 0.02 900.41 0.02 1.50 0.00 900.33 0.00 10.50 0.03 900.42 0.03 19.50 0.02 900.41 0.02 1.75 0.00 900.33 0.00 10.75 0.03 900.42 0.03 19.75 0.02 900.40 0.02 2.00 0.00 900.33 0.00 11.00 0.04 900.43 0.04 20.00 0.02 900.40 0.02 2.25 0.00 900.34 0.00 11.25 0.05 900.45 0.05 20.25 0.02 900.40 0.02 2.50 0.00 900.34 0.00 11.50 0.07 900.47 0.07 20.50 0.02 900.40 0.02 2.75 0.00 900.35 0.00 11.75 0.20 900.58 0.20 20.75 0.02 900.40 0.02 3.00 0.00 900.35 0.00 12.00 0.76 900.88 0.76 21.00 0.02 900.40 0.02 3.25 0.00 900.35 0.00 12.25 0.64 900.84 0.64 21.25 0.02 900.40 0.02 3.50 0.00 900.35 0.00 12.50 0.51 900.77 0.51 21.50 0.02 900.40 0.02 3.75 0.00 900.35 0.00 12.75 0.30 900.65 0.30 21.75 0.02 900.40 0.02 4.00 0.00 900.36 0.00 13.00 0.19 900.58 0.19 22.00 0.02 900.40 0.02 4.25 0.00 900.36 0.00 13.25 0.14 900.53 0.14 22.25 0.02 900.40 0.02 4.50 0.00 900.36 0.00 13.50 0.11 900.51 0.11 22.50 0.02 900.39 0.02 4.75 0.00 900.36 0.00 13.75 0.09 900.49 0.09 22.75 0.02 900.39 0.02 5.00 0.01 900.36 0.01 14.00 0.07 900.48 0.07 23.00 0.02 900.39 0.02 5.25 0.01 900.36 0.01 14.25 0.07 900.47 0.07 23.25 0.02 900.39 0.02 5.50 0.01 900.37 0.01 14.50 0.06 900.46 0.06 23.50 0.02 900.39 0.02 5.75 0.01 900.37 0.01 14.75 0.05 900.45 0.05 23.75 0.02 900.39 0.02 6.00 0.01 900.37 0.01 15.00 0.05 900.45 0.05 24.00 0.01 900.39 0.01 6.25 0.01 900.37 0.01 15.25 0.05 900.44 0.05 6.50 0.01 900.37 0.01 15.50 0.04 900.44 0.04 6.75 0.01 900.37 0.01 15.75 0.04 900.43 0.04 7.00 0.01 900.38 0.01 16.00 0.04 900.43 0.04 7.25 0.01 900.38 0.01 16.25 0.04 900.43 0.04 7.50 0.01 900.38 0.01 16.50 0.03 900.42 0.03 7.75 0.01 900.38 0.01 16.75 0.03 900.42 0.03 8.00 0.01 900.38 0.01 17.00 0.03 900.42 0.03 8.25 0.01 900.38 0.01 17.25 0.03 900.42 0.03 8.50 0.01 900.39 0.01 17.50 0.03 900.42 0.03 8.75 0.01 900.39 0.01 17.75 0.03 900.41 0.03

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 105 Summary for Pond RCVR 3: RCVR 3 Inflow Area = 0.150 ac, 93.33% Impervious, Inflow Depth > 2.79" for 10-yr event Inflow = 0.57 cfs @ 12.05 hrs, Volume= 0.035 af Outflow = 0.57 cfs @ 12.05 hrs, Volume= 0.035 af, Atten= 0%, Lag= 0.0 min Primary = 0.57 cfs @ 12.05 hrs, Volume= 0.035 af Routed to Pond RCVR 2 : RCVR 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.12' @ 12.07 hrs Device Routing Invert Outlet Devices #1 Primary 900.48' 8.0" Round RCVR 3 to RCVR 2 L= 39.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.48' / 900.32' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.49 cfs @ 12.05 hrs HW=901.11' TW=900.94' (Dynamic Tailwater) 1=RCVR 3 to RCVR 2 (Outlet Controls 0.49 cfs @ 1.84 fps) Pond RCVR 3: RCVR 3 RCVR 3 to RCVR 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 106 Pond RCVR 3: RCVR 3 Hydrograph Inflow 0.57 cfs Primary 0.57 cfs 0.6 Inflow Area=0.150 ac 0.55 0.5 Peak Elev=901.12' 0.45 8.0" 0.4 Round Culvert Flow (cfs) 0.35 n=0.013 0.3 0.25 L=39.0' 0.2 S=0.0041 '/' 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 107 Pond RCVR 3: RCVR 3 Stage-Discharge Primary 901.1 901.05 901 900.95 900.9 Elevation (feet) 900.85 900.8 900.75 900.7 900.65 900.6 900.55 900.5 RCVR 3 to RCVR 2 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 108 Pond RCVR 3: RCVR 3 Stage-Area-Storage Storage 901.1 901.05 901 900.95 900.9 Elevation (feet) 900.85 900.8 900.75 900.7 900.65 900.6 900.55 900.5 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 109 Hydrograph for Pond RCVR 3: RCVR 3 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.48 0.00 9.00 0.01 900.55 0.01 18.00 0.01 900.55 0.01 0.25 0.00 900.48 0.00 9.25 0.01 900.56 0.01 18.25 0.01 900.55 0.01 0.50 0.00 900.48 0.00 9.50 0.01 900.56 0.01 18.50 0.01 900.54 0.01 0.75 0.00 900.48 0.00 9.75 0.01 900.56 0.01 18.75 0.01 900.54 0.01 1.00 0.00 900.48 0.00 10.00 0.01 900.57 0.01 19.00 0.01 900.54 0.01 1.25 0.00 900.48 0.00 10.25 0.02 900.57 0.02 19.25 0.01 900.54 0.01 1.50 0.00 900.48 0.00 10.50 0.02 900.58 0.02 19.50 0.01 900.54 0.01 1.75 0.00 900.48 0.00 10.75 0.02 900.58 0.02 19.75 0.01 900.54 0.01 2.00 0.00 900.48 0.00 11.00 0.03 900.59 0.03 20.00 0.01 900.54 0.01 2.25 0.00 900.49 0.00 11.25 0.03 900.61 0.03 20.25 0.01 900.54 0.01 2.50 0.00 900.50 0.00 11.50 0.04 900.63 0.04 20.50 0.01 900.54 0.01 2.75 0.00 900.50 0.00 11.75 0.13 900.74 0.13 20.75 0.01 900.54 0.01 3.00 0.00 900.51 0.00 12.00 0.45 901.01 0.45 21.00 0.01 900.54 0.01 3.25 0.00 900.51 0.00 12.25 0.21 900.94 0.21 21.25 0.01 900.54 0.01 3.50 0.00 900.51 0.00 12.50 0.12 900.84 0.12 21.50 0.01 900.54 0.01 3.75 0.00 900.51 0.00 12.75 0.04 900.70 0.04 21.75 0.01 900.54 0.01 4.00 0.00 900.51 0.00 13.00 0.03 900.65 0.03 22.00 0.01 900.53 0.01 4.25 0.00 900.52 0.00 13.25 0.03 900.62 0.03 22.25 0.01 900.53 0.01 4.50 0.00 900.52 0.00 13.50 0.02 900.61 0.02 22.50 0.01 900.53 0.01 4.75 0.00 900.52 0.00 13.75 0.02 900.60 0.02 22.75 0.00 900.53 0.00 5.00 0.00 900.52 0.00 14.00 0.02 900.59 0.02 23.00 0.00 900.53 0.00 5.25 0.00 900.52 0.00 14.25 0.02 900.58 0.02 23.25 0.00 900.53 0.00 5.50 0.00 900.53 0.00 14.50 0.02 900.58 0.02 23.50 0.00 900.53 0.00 5.75 0.00 900.53 0.00 14.75 0.01 900.57 0.01 23.75 0.00 900.53 0.00 6.00 0.00 900.53 0.00 15.00 0.01 900.57 0.01 24.00 0.00 900.53 0.00 6.25 0.00 900.53 0.00 15.25 0.01 900.57 0.01 6.50 0.01 900.53 0.01 15.50 0.01 900.56 0.01 6.75 0.01 900.53 0.01 15.75 0.01 900.56 0.01 7.00 0.01 900.54 0.01 16.00 0.01 900.56 0.01 7.25 0.01 900.54 0.01 16.25 0.01 900.56 0.01 7.50 0.01 900.54 0.01 16.50 0.01 900.56 0.01 7.75 0.01 900.54 0.01 16.75 0.01 900.55 0.01 8.00 0.01 900.54 0.01 17.00 0.01 900.55 0.01 8.25 0.01 900.55 0.01 17.25 0.01 900.55 0.01 8.50 0.01 900.55 0.01 17.50 0.01 900.55 0.01 8.75 0.01 900.55 0.01 17.75 0.01 900.55 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 110 Summary for Pond RCVR 4: RCVR 4 Inflow Area = 0.080 ac, 87.50% Impervious, Inflow Depth > 2.69" for 10-yr event Inflow = 0.31 cfs @ 12.04 hrs, Volume= 0.018 af Outflow = 0.31 cfs @ 12.04 hrs, Volume= 0.018 af, Atten= 0%, Lag= 0.0 min Primary = 0.31 cfs @ 12.04 hrs, Volume= 0.018 af Routed to Pond RCVR 5 : RCVR 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.64' @ 12.05 hrs Device Routing Invert Outlet Devices #1 Primary 901.13' 8.0" Round RCVR 4 to RCVR 5 L= 22.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 901.13' / 901.04' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.35 cfs @ 12.04 hrs HW=901.63' TW=901.52' (Dynamic Tailwater) 1=RCVR 4 to RCVR 5 (Outlet Controls 0.35 cfs @ 1.71 fps) Pond RCVR 4: RCVR 4 RCVR 4 to RCVR 5

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 111 Pond RCVR 4: RCVR 4 Hydrograph Inflow 0.34 0.31 cfs Primary 0.31 cfs 0.32 0.3 Inflow Area=0.080 ac 0.28 Peak Elev=901.64' 0.26 0.24 8.0" 0.22 0.2 Round Culvert Flow (cfs) 0.18 n=0.013 0.16 0.14 L=22.0' 0.12 0.1 S=0.0041 '/' 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 112 Pond RCVR 4: RCVR 4 Stage-Discharge Primary 901.75 901.7 901.65 901.6 901.55 Elevation (feet) 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 RCVR 4 to RCVR 5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 113 Pond RCVR 4: RCVR 4 Stage-Area-Storage Storage 901.75 901.7 901.65 901.6 901.55 Elevation (feet) 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 114 Hydrograph for Pond RCVR 4: RCVR 4 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 901.13 0.00 9.00 0.00 901.18 0.00 18.00 0.00 901.18 0.00 0.25 0.00 901.13 0.00 9.25 0.01 901.19 0.01 18.25 0.00 901.18 0.00 0.50 0.00 901.13 0.00 9.50 0.01 901.19 0.01 18.50 0.00 901.18 0.00 0.75 0.00 901.13 0.00 9.75 0.01 901.19 0.01 18.75 0.00 901.18 0.00 1.00 0.00 901.13 0.00 10.00 0.01 901.19 0.01 19.00 0.00 901.18 0.00 1.25 0.00 901.13 0.00 10.25 0.01 901.20 0.01 19.25 0.00 901.18 0.00 1.50 0.00 901.13 0.00 10.50 0.01 901.20 0.01 19.50 0.00 901.18 0.00 1.75 0.00 901.13 0.00 10.75 0.01 901.21 0.01 19.75 0.00 901.17 0.00 2.00 0.00 901.13 0.00 11.00 0.01 901.22 0.01 20.00 0.00 901.17 0.00 2.25 0.00 901.13 0.00 11.25 0.02 901.23 0.02 20.25 0.00 901.17 0.00 2.50 0.00 901.13 0.00 11.50 0.02 901.25 0.02 20.50 0.00 901.17 0.00 2.75 0.00 901.14 0.00 11.75 0.07 901.34 0.07 20.75 0.00 901.17 0.00 3.00 0.00 901.14 0.00 12.00 0.26 901.57 0.26 21.00 0.00 901.17 0.00 3.25 0.00 901.14 0.00 12.25 0.11 901.45 0.11 21.25 0.00 901.17 0.00 3.50 0.00 901.15 0.00 12.50 0.06 901.38 0.06 21.50 0.00 901.17 0.00 3.75 0.00 901.15 0.00 12.75 0.02 901.27 0.02 21.75 0.00 901.17 0.00 4.00 0.00 901.15 0.00 13.00 0.02 901.24 0.02 22.00 0.00 901.17 0.00 4.25 0.00 901.15 0.00 13.25 0.01 901.23 0.01 22.25 0.00 901.17 0.00 4.50 0.00 901.15 0.00 13.50 0.01 901.22 0.01 22.50 0.00 901.17 0.00 4.75 0.00 901.16 0.00 13.75 0.01 901.21 0.01 22.75 0.00 901.17 0.00 5.00 0.00 901.16 0.00 14.00 0.01 901.21 0.01 23.00 0.00 901.17 0.00 5.25 0.00 901.16 0.00 14.25 0.01 901.20 0.01 23.25 0.00 901.17 0.00 5.50 0.00 901.16 0.00 14.50 0.01 901.20 0.01 23.50 0.00 901.17 0.00 5.75 0.00 901.16 0.00 14.75 0.01 901.20 0.01 23.75 0.00 901.17 0.00 6.00 0.00 901.16 0.00 15.00 0.01 901.19 0.01 24.00 0.00 901.17 0.00 6.25 0.00 901.16 0.00 15.25 0.01 901.19 0.01 6.50 0.00 901.17 0.00 15.50 0.01 901.19 0.01 6.75 0.00 901.17 0.00 15.75 0.01 901.19 0.01 7.00 0.00 901.17 0.00 16.00 0.01 901.19 0.01 7.25 0.00 901.17 0.00 16.25 0.01 901.19 0.01 7.50 0.00 901.17 0.00 16.50 0.01 901.19 0.01 7.75 0.00 901.17 0.00 16.75 0.00 901.18 0.00 8.00 0.00 901.18 0.00 17.00 0.00 901.18 0.00 8.25 0.00 901.18 0.00 17.25 0.00 901.18 0.00 8.50 0.00 901.18 0.00 17.50 0.00 901.18 0.00 8.75 0.00 901.18 0.00 17.75 0.00 901.18 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 115 Summary for Pond RCVR 5: RCVR 5 Inflow Area = 0.130 ac, 92.31% Impervious, Inflow Depth > 2.77" for 10-yr event Inflow = 0.49 cfs @ 12.01 hrs, Volume= 0.030 af Outflow = 0.49 cfs @ 12.01 hrs, Volume= 0.030 af, Atten= 0%, Lag= 0.0 min Primary = 0.49 cfs @ 12.01 hrs, Volume= 0.030 af Routed to Pond SWALE : SWALE Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.56' @ 12.01 hrs Device Routing Invert Outlet Devices #1 Primary 901.04' 8.0" Round RCVR 5 to SWALE L= 89.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 901.04' / 900.68' S= 0.0040 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.48 cfs @ 12.01 hrs HW=901.55' TW=900.97' (Dynamic Tailwater) 1=RCVR 5 to SWALE (Barrel Controls 0.48 cfs @ 2.32 fps) Pond RCVR 5: RCVR 5 RCVR 5 to SWALE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 116 Pond RCVR 5: RCVR 5 Hydrograph Inflow 0.55 0.49 cfs Primary 0.49 cfs 0.5 Inflow Area=0.130 ac 0.45 Peak Elev=901.56' 0.4 8.0" 0.35 Round Culvert Flow (cfs) 0.3 n=0.013 0.25 L=89.0' 0.2 S=0.0040 '/' 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 117 Pond RCVR 5: RCVR 5 Stage-Discharge 901.7 Primary 901.65 901.6 901.55 901.5 901.45 Elevation (feet) 901.4 901.35 901.3 901.25 901.2 901.15 901.1 RCVR 5 to SWALE 901.05 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 118 Pond RCVR 5: RCVR 5 Stage-Area-Storage 901.7 Storage 901.65 901.6 901.55 901.5 901.45 Elevation (feet) 901.4 901.35 901.3 901.25 901.2 901.15 901.1 901.05 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 119 Hydrograph for Pond RCVR 5: RCVR 5 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 901.04 0.00 9.00 0.01 901.11 0.01 18.00 0.01 901.10 0.01 0.25 0.00 901.04 0.00 9.25 0.01 901.11 0.01 18.25 0.01 901.10 0.01 0.50 0.00 901.04 0.00 9.50 0.01 901.11 0.01 18.50 0.01 901.10 0.01 0.75 0.00 901.04 0.00 9.75 0.01 901.12 0.01 18.75 0.01 901.10 0.01 1.00 0.00 901.04 0.00 10.00 0.01 901.12 0.01 19.00 0.01 901.10 0.01 1.25 0.00 901.04 0.00 10.25 0.01 901.12 0.01 19.25 0.01 901.10 0.01 1.50 0.00 901.05 0.00 10.50 0.02 901.13 0.02 19.50 0.01 901.10 0.01 1.75 0.00 901.05 0.00 10.75 0.02 901.14 0.02 19.75 0.01 901.09 0.01 2.00 0.00 901.05 0.00 11.00 0.02 901.14 0.02 20.00 0.01 901.09 0.01 2.25 0.00 901.06 0.00 11.25 0.03 901.16 0.03 20.25 0.01 901.09 0.01 2.50 0.00 901.06 0.00 11.50 0.04 901.18 0.04 20.50 0.01 901.09 0.01 2.75 0.00 901.06 0.00 11.75 0.12 901.28 0.12 20.75 0.01 901.09 0.01 3.00 0.00 901.06 0.00 12.00 0.49 901.56 0.49 21.00 0.00 901.09 0.00 3.25 0.00 901.07 0.00 12.25 0.16 901.39 0.16 21.25 0.00 901.09 0.00 3.50 0.00 901.07 0.00 12.50 0.10 901.33 0.10 21.50 0.00 901.09 0.00 3.75 0.00 901.07 0.00 12.75 0.03 901.22 0.03 21.75 0.00 901.09 0.00 4.00 0.00 901.07 0.00 13.00 0.03 901.18 0.03 22.00 0.00 901.09 0.00 4.25 0.00 901.07 0.00 13.25 0.02 901.16 0.02 22.25 0.00 901.09 0.00 4.50 0.00 901.08 0.00 13.50 0.02 901.15 0.02 22.50 0.00 901.09 0.00 4.75 0.00 901.08 0.00 13.75 0.02 901.14 0.02 22.75 0.00 901.09 0.00 5.00 0.00 901.08 0.00 14.00 0.02 901.13 0.02 23.00 0.00 901.09 0.00 5.25 0.00 901.08 0.00 14.25 0.01 901.13 0.01 23.25 0.00 901.09 0.00 5.50 0.00 901.08 0.00 14.50 0.01 901.13 0.01 23.50 0.00 901.09 0.00 5.75 0.00 901.08 0.00 14.75 0.01 901.12 0.01 23.75 0.00 901.09 0.00 6.00 0.00 901.08 0.00 15.00 0.01 901.12 0.01 24.00 0.00 901.09 0.00 6.25 0.00 901.09 0.00 15.25 0.01 901.12 0.01 6.50 0.00 901.09 0.00 15.50 0.01 901.11 0.01 6.75 0.00 901.09 0.00 15.75 0.01 901.11 0.01 7.00 0.00 901.09 0.00 16.00 0.01 901.11 0.01 7.25 0.01 901.09 0.01 16.25 0.01 901.11 0.01 7.50 0.01 901.09 0.01 16.50 0.01 901.11 0.01 7.75 0.01 901.10 0.01 16.75 0.01 901.11 0.01 8.00 0.01 901.10 0.01 17.00 0.01 901.10 0.01 8.25 0.01 901.10 0.01 17.25 0.01 901.10 0.01 8.50 0.01 901.10 0.01 17.50 0.01 901.10 0.01 8.75 0.01 901.10 0.01 17.75 0.01 901.10 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 120 Summary for Pond SWALE: SWALE Inflow Area = 0.280 ac, 64.29% Impervious, Inflow Depth > 2.28" for 10-yr event Inflow = 0.64 cfs @ 12.02 hrs, Volume= 0.053 af Outflow = 0.37 cfs @ 12.31 hrs, Volume= 0.042 af, Atten= 43%, Lag= 17.4 min Primary = 0.37 cfs @ 12.31 hrs, Volume= 0.042 af Routed to Pond RCVR 1 : RCVR 1 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.23' @ 12.30 hrs Surf.Area= 1,197 sf Storage= 972 cf Plug-Flow detention time= 145.5 min calculated for 0.042 af (79% of inflow) Center-of-Mass det. time= 69.4 min ( 858.9 - 789.6 ) Volume Invert Avail.Storage Storage Description #1 900.00' 2,104 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 900.00 396 0 0 901.00 1,038 717 717 902.00 1,736 1,387 2,104 Device Routing Invert Outlet Devices #1 Primary 900.68' 8.0" Round 8" HDPE L= 32.0' CPP, mitered to conform to fill, Ke= 0.700 Inlet / Outlet Invert= 900.68' / 900.55' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.38 cfs @ 12.31 hrs HW=901.23' TW=901.09' (Dynamic Tailwater) 1=8" HDPE (Outlet Controls 0.38 cfs @ 1.67 fps)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 121 Pond SWALE: SWALE 8" HDPE Pond SWALE: SWALE Hydrograph Inflow 0.64 cfs Primary 0.7 0.65 Inflow Area=0.280 ac 0.6 Peak Elev=901.23' 0.55 0.5 Storage=972 cf 0.45 8.0" 0.37 cfs Flow (cfs) 0.4 Round Culvert 0.35 0.3 n=0.013 0.25 L=32.0' 0.2 0.15 S=0.0041 '/' 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 122 Pond SWALE: SWALE Stage-Discharge 902 Primary Elevation (feet) 901 8" HDPE Initial Tailwater 900 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 123 Pond SWALE: SWALE Stage-Area-Storage Surface/Horizontal/Wetted Area (sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 Surface Storage 902 Elevation (feet) 901 Custom Stage Data 900 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 Storage (cubic-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 124 Hydrograph for Pond SWALE: SWALE Time Inflow Storage Elevation Primary Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 900.00 0.00 18.00 0.01 497 900.77 0.02 0.50 0.00 0 900.00 0.00 18.50 0.01 495 900.77 0.01 1.00 0.00 0 900.00 0.00 19.00 0.01 492 900.77 0.01 1.50 0.00 0 900.00 0.00 19.50 0.01 490 900.76 0.01 2.00 0.00 0 900.00 0.00 20.00 0.01 488 900.76 0.01 2.50 0.00 1 900.00 0.00 20.50 0.01 486 900.76 0.01 3.00 0.00 3 900.01 0.00 21.00 0.01 485 900.76 0.01 3.50 0.00 5 900.01 0.00 21.50 0.01 483 900.76 0.01 4.00 0.00 8 900.02 0.00 22.00 0.01 482 900.75 0.01 4.50 0.00 11 900.03 0.00 22.50 0.01 480 900.75 0.01 5.00 0.00 16 900.04 0.00 23.00 0.01 479 900.75 0.01 5.50 0.00 21 900.05 0.00 23.50 0.01 478 900.75 0.01 6.00 0.00 27 900.07 0.00 24.00 0.01 477 900.75 0.01 6.50 0.00 35 900.08 0.00 7.00 0.00 43 900.10 0.00 7.50 0.01 52 900.12 0.00 8.00 0.01 64 900.14 0.00 8.50 0.01 78 900.17 0.00 9.00 0.01 95 900.20 0.00 9.50 0.01 115 900.24 0.00 10.00 0.02 142 900.29 0.00 10.50 0.02 176 900.35 0.00 11.00 0.03 224 900.42 0.00 11.50 0.06 299 900.53 0.00 12.00 0.62 672 900.96 0.00 12.50 0.23 923 901.19 0.33 13.00 0.06 702 900.99 0.15 13.50 0.04 605 900.89 0.07 14.00 0.03 564 900.85 0.05 14.50 0.03 543 900.82 0.04 15.00 0.02 530 900.81 0.03 15.50 0.02 521 900.80 0.03 16.00 0.02 514 900.79 0.02 16.50 0.02 509 900.79 0.02 17.00 0.02 504 900.78 0.02 17.50 0.01 501 900.78 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 125 Summary for Link POST: Post Development Inflow Area = 0.690 ac, 56.52% Impervious, Inflow Depth > 2.01" for 10-yr event Inflow = 0.93 cfs @ 12.07 hrs, Volume= 0.115 af Primary = 0.93 cfs @ 12.07 hrs, Volume= 0.115 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link POST: Post Development Hydrograph Inflow 0.93 cfs Primary 1 0.93 cfs Inflow Area=0.690 ac Flow (cfs) 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 126 Hydrograph for Link POST: Post Development Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 9.00 0.02 0.00 0.02 18.00 0.03 0.00 0.03 0.25 0.00 0.00 0.00 9.25 0.02 0.00 0.02 18.25 0.03 0.00 0.03 0.50 0.00 0.00 0.00 9.50 0.02 0.00 0.02 18.50 0.03 0.00 0.03 0.75 0.00 0.00 0.00 9.75 0.02 0.00 0.02 18.75 0.03 0.00 0.03 1.00 0.00 0.00 0.00 10.00 0.02 0.00 0.02 19.00 0.03 0.00 0.03 1.25 0.00 0.00 0.00 10.25 0.03 0.00 0.03 19.25 0.03 0.00 0.03 1.50 0.00 0.00 0.00 10.50 0.03 0.00 0.03 19.50 0.03 0.00 0.03 1.75 0.00 0.00 0.00 10.75 0.03 0.00 0.03 19.75 0.03 0.00 0.03 2.00 0.00 0.00 0.00 11.00 0.04 0.00 0.04 20.00 0.03 0.00 0.03 2.25 0.00 0.00 0.00 11.25 0.05 0.00 0.05 20.25 0.03 0.00 0.03 2.50 0.00 0.00 0.00 11.50 0.08 0.00 0.08 20.50 0.03 0.00 0.03 2.75 0.00 0.00 0.00 11.75 0.22 0.00 0.22 20.75 0.03 0.00 0.03 3.00 0.00 0.00 0.00 12.00 0.80 0.00 0.80 21.00 0.02 0.00 0.02 3.25 0.00 0.00 0.00 12.25 0.81 0.00 0.81 21.25 0.02 0.00 0.02 3.50 0.00 0.00 0.00 12.50 0.69 0.00 0.69 21.50 0.02 0.00 0.02 3.75 0.00 0.00 0.00 12.75 0.42 0.00 0.42 21.75 0.02 0.00 0.02 4.00 0.00 0.00 0.00 13.00 0.26 0.00 0.26 22.00 0.02 0.00 0.02 4.25 0.00 0.00 0.00 13.25 0.18 0.00 0.18 22.25 0.02 0.00 0.02 4.50 0.00 0.00 0.00 13.50 0.14 0.00 0.14 22.50 0.02 0.00 0.02 4.75 0.00 0.00 0.00 13.75 0.11 0.00 0.11 22.75 0.02 0.00 0.02 5.00 0.01 0.00 0.01 14.00 0.09 0.00 0.09 23.00 0.02 0.00 0.02 5.25 0.01 0.00 0.01 14.25 0.08 0.00 0.08 23.25 0.02 0.00 0.02 5.50 0.01 0.00 0.01 14.50 0.07 0.00 0.07 23.50 0.02 0.00 0.02 5.75 0.01 0.00 0.01 14.75 0.07 0.00 0.07 23.75 0.02 0.00 0.02 6.00 0.01 0.00 0.01 15.00 0.06 0.00 0.06 24.00 0.02 0.00 0.02 6.25 0.01 0.00 0.01 15.25 0.06 0.00 0.06 6.50 0.01 0.00 0.01 15.50 0.05 0.00 0.05 6.75 0.01 0.00 0.01 15.75 0.05 0.00 0.05 7.00 0.01 0.00 0.01 16.00 0.05 0.00 0.05 7.25 0.01 0.00 0.01 16.25 0.05 0.00 0.05 7.50 0.01 0.00 0.01 16.50 0.04 0.00 0.04 7.75 0.01 0.00 0.01 16.75 0.04 0.00 0.04 8.00 0.01 0.00 0.01 17.00 0.04 0.00 0.04 8.25 0.01 0.00 0.01 17.25 0.04 0.00 0.04 8.50 0.01 0.00 0.01 17.50 0.04 0.00 0.04 8.75 0.01 0.00 0.01 17.75 0.04 0.00 0.04

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 127 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment ATO: Area to Offsite Runoff Area=0.190 ac 0.00% Impervious Runoff Depth>1.91" Flow Length=60' Slope=0.0050 '/' Tc=30.0 min CN=80 Runoff=0.28 cfs 0.030 af Subcatchment DA 1: Drainage Area 1 Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>3.62" Flow Length=80' Slope=0.0100 '/' Tc=1.6 min CN=98 Runoff=0.35 cfs 0.018 af Subcatchment DA 2: Drainage Area 2 Runoff Area=0.010 ac 100.00% Impervious Runoff Depth>3.62" Flow Length=35' Slope=0.0100 '/' Tc=0.8 min CN=98 Runoff=0.06 cfs 0.003 af Subcatchment DA 3: Drainage Area 3 Runoff Area=0.150 ac 93.33% Impervious Runoff Depth>3.50" Flow Length=75' Slope=0.0100 '/' Tc=7.2 min CN=97 Runoff=0.70 cfs 0.044 af Subcatchment DA 4: Drainage Area 4 Runoff Area=0.080 ac 87.50% Impervious Runoff Depth>3.39" Flow Length=20' Slope=0.0100 '/' Tc=6.3 min CN=96 Runoff=0.38 cfs 0.023 af Subcatchment DA 5: Drainage Area 5 Runoff Area=0.050 ac 100.00% Impervious Runoff Depth>3.62" Flow Length=60' Slope=0.0050 '/' Tc=1.7 min CN=98 Runoff=0.29 cfs 0.015 af Subcatchment DA 6: Drainage Area 6 Runoff Area=0.150 ac 40.00% Impervious Runoff Depth>2.49" Flow Length=40' Slope=0.0045 '/' Tc=15.0 min CN=87 Runoff=0.41 cfs 0.031 af Pond EX RCVR: EX RCVR Peak Elev=900.32' Inflow=1.14 cfs 0.123 af 12.0" Round Culvert n=0.013 L=121.0' S=0.0031 '/' Outflow=1.14 cfs 0.123 af Pond RCVR 1: RCVR 1 Peak Elev=901.27' Inflow=0.62 cfs 0.076 af 8.0" Round Culvert n=0.013 L=59.0' S=0.0041 '/' Outflow=0.62 cfs 0.076 af Pond RCVR 2: RCVR 2 Peak Elev=901.12' Inflow=1.14 cfs 0.123 af 8.0" Round Culvert n=0.013 L=72.0' S=0.0100 '/' Outflow=1.14 cfs 0.123 af Pond RCVR 3: RCVR 3 Peak Elev=901.28' Inflow=0.70 cfs 0.044 af 8.0" Round Culvert n=0.013 L=39.0' S=0.0041 '/' Outflow=0.70 cfs 0.044 af

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 128 Pond RCVR 4: RCVR 4 Peak Elev=901.72' Inflow=0.38 cfs 0.023 af 8.0" Round Culvert n=0.013 L=22.0' S=0.0041 '/' Outflow=0.38 cfs 0.023 af Pond RCVR 5: RCVR 5 Peak Elev=901.63' Inflow=0.60 cfs 0.038 af 8.0" Round Culvert n=0.013 L=89.0' S=0.0040 '/' Outflow=0.60 cfs 0.038 af Pond SWALE: SWALE Peak Elev=901.39' Storage=1,170 cf Inflow=0.79 cfs 0.069 af 8.0" Round Culvert n=0.013 L=32.0' S=0.0041 '/' Outflow=0.51 cfs 0.058 af Link POST: Post Development Inflow=1.24 cfs 0.153 af Primary=1.24 cfs 0.153 af Total Runoff Area = 0.690 ac Runoff Volume = 0.164 af Average Runoff Depth = 2.85" 43.48% Pervious = 0.300 ac 56.52% Impervious = 0.390 ac

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 129 Summary for Subcatchment ATO: Area to Offsite Runoff = 0.28 cfs @ 12.39 hrs, Volume= 0.030 af, Depth> 1.91" Routed to Link POST : Post Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.190 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 30.0 60 0.0050 0.03 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 2.20" Subcatchment ATO: Area to Offsite

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 130 Subcatchment ATO: Area to Offsite Hydrograph Runoff 0.3 0.28 cfs 0.28 extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" 0.26 Runoff Area=0.190 ac Runoff Volume=0.030 af 0.24 Runoff Depth>1.91" 0.22 Flow Length=60' Slope=0.0050 '/' 0.2 Tc=30.0 min 0.18 CN=80 Flow (cfs) 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 131 Hydrograph for Subcatchment ATO: Area to Offsite Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.00 0.00 18.00 3.57 1.70 0.01 0.25 0.01 0.00 0.00 9.25 0.54 0.00 0.00 18.25 3.59 1.71 0.01 0.50 0.02 0.00 0.00 9.50 0.57 0.00 0.00 18.50 3.60 1.72 0.01 0.75 0.03 0.00 0.00 9.75 0.60 0.00 0.00 18.75 3.62 1.73 0.01 1.00 0.04 0.00 0.00 10.00 0.64 0.01 0.00 19.00 3.63 1.74 0.01 1.25 0.05 0.00 0.00 10.25 0.68 0.01 0.00 19.25 3.65 1.75 0.01 1.50 0.06 0.00 0.00 10.50 0.72 0.02 0.00 19.50 3.66 1.76 0.01 1.75 0.07 0.00 0.00 10.75 0.77 0.03 0.00 19.75 3.67 1.77 0.01 2.00 0.08 0.00 0.00 11.00 0.83 0.04 0.01 20.00 3.68 1.78 0.01 2.25 0.09 0.00 0.00 11.25 0.90 0.05 0.01 20.25 3.70 1.79 0.01 2.50 0.10 0.00 0.00 11.50 0.99 0.08 0.01 20.50 3.71 1.80 0.01 2.75 0.11 0.00 0.00 11.75 1.29 0.19 0.02 20.75 3.72 1.81 0.01 3.00 0.12 0.00 0.00 12.00 2.13 0.64 0.07 21.00 3.73 1.82 0.01 3.25 0.13 0.00 0.00 12.25 2.60 0.96 0.24 21.25 3.74 1.83 0.01 3.50 0.14 0.00 0.00 12.50 2.88 1.16 0.26 21.50 3.75 1.84 0.01 3.75 0.16 0.00 0.00 12.75 2.97 1.22 0.17 21.75 3.76 1.85 0.01 4.00 0.17 0.00 0.00 13.00 3.03 1.28 0.09 22.00 3.77 1.86 0.01 4.25 0.18 0.00 0.00 13.25 3.09 1.32 0.05 22.25 3.78 1.86 0.01 4.50 0.19 0.00 0.00 13.50 3.14 1.35 0.04 22.50 3.79 1.87 0.01 4.75 0.21 0.00 0.00 13.75 3.18 1.39 0.03 22.75 3.80 1.88 0.01 5.00 0.22 0.00 0.00 14.00 3.22 1.41 0.03 23.00 3.81 1.89 0.01 5.25 0.23 0.00 0.00 14.25 3.25 1.44 0.02 23.25 3.82 1.90 0.01 5.50 0.25 0.00 0.00 14.50 3.28 1.47 0.02 23.50 3.83 1.90 0.01 5.75 0.26 0.00 0.00 14.75 3.31 1.49 0.02 23.75 3.84 1.91 0.01 6.00 0.28 0.00 0.00 15.00 3.34 1.51 0.02 24.00 3.85 1.92 0.01 6.25 0.29 0.00 0.00 15.25 3.36 1.53 0.02 6.50 0.31 0.00 0.00 15.50 3.39 1.55 0.02 6.75 0.33 0.00 0.00 15.75 3.41 1.57 0.01 7.00 0.34 0.00 0.00 16.00 3.43 1.58 0.01 7.25 0.36 0.00 0.00 16.25 3.45 1.60 0.01 7.50 0.38 0.00 0.00 16.50 3.47 1.61 0.01 7.75 0.40 0.00 0.00 16.75 3.49 1.63 0.01 8.00 0.42 0.00 0.00 17.00 3.51 1.64 0.01 8.25 0.44 0.00 0.00 17.25 3.53 1.66 0.01 8.50 0.47 0.00 0.00 17.50 3.54 1.67 0.01 8.75 0.49 0.00 0.00 17.75 3.56 1.68 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 132 Summary for Subcatchment DA 1: Drainage Area 1 Runoff = 0.35 cfs @ 11.98 hrs, Volume= 0.018 af, Depth> 3.62" Routed to Pond RCVR 1 : RCVR 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.060 98 Paved parking, HSG D 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.6 80 0.0100 0.83 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 1: Drainage Area 1

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 133 Subcatchment DA 1: Drainage Area 1 Hydrograph Runoff 0.38 0.35 cfs 0.36 extreme_precip_tables_output (29) 24-hr S1 25-yr 0.34 Rainfall=3.85" 0.32 Runoff Area=0.060 ac 0.3 Runoff Volume=0.018 af Runoff Depth>3.62" 0.28 Flow Length=80' 0.26 Slope=0.0100 '/' 0.24 Tc=1.6 min CN=98 Flow (cfs) 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 134 Hydrograph for Subcatchment DA 1: Drainage Area 1 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.33 0.01 18.00 3.57 3.34 0.00 0.25 0.01 0.00 0.00 9.25 0.54 0.36 0.01 18.25 3.59 3.36 0.00 0.50 0.02 0.00 0.00 9.50 0.57 0.38 0.01 18.50 3.60 3.37 0.00 0.75 0.03 0.00 0.00 9.75 0.60 0.41 0.01 18.75 3.62 3.38 0.00 1.00 0.04 0.00 0.00 10.00 0.64 0.45 0.01 19.00 3.63 3.40 0.00 1.25 0.05 0.00 0.00 10.25 0.68 0.48 0.01 19.25 3.65 3.41 0.00 1.50 0.06 0.00 0.00 10.50 0.72 0.52 0.01 19.50 3.66 3.42 0.00 1.75 0.07 0.00 0.00 10.75 0.77 0.57 0.01 19.75 3.67 3.44 0.00 2.00 0.08 0.01 0.00 11.00 0.83 0.62 0.01 20.00 3.68 3.45 0.00 2.25 0.09 0.01 0.00 11.25 0.90 0.69 0.02 20.25 3.70 3.46 0.00 2.50 0.10 0.01 0.00 11.50 0.99 0.78 0.03 20.50 3.71 3.47 0.00 2.75 0.11 0.02 0.00 11.75 1.29 1.07 0.08 20.75 3.72 3.48 0.00 3.00 0.12 0.02 0.00 12.00 2.13 1.90 0.33 21.00 3.73 3.50 0.00 3.25 0.13 0.03 0.00 12.25 2.60 2.37 0.08 21.25 3.74 3.51 0.00 3.50 0.14 0.03 0.00 12.50 2.88 2.65 0.06 21.50 3.75 3.52 0.00 3.75 0.16 0.04 0.00 12.75 2.97 2.73 0.02 21.75 3.76 3.53 0.00 4.00 0.17 0.05 0.00 13.00 3.03 2.80 0.02 22.00 3.77 3.54 0.00 4.25 0.18 0.06 0.00 13.25 3.09 2.86 0.01 22.25 3.78 3.55 0.00 4.50 0.19 0.06 0.00 13.50 3.14 2.90 0.01 22.50 3.79 3.56 0.00 4.75 0.21 0.07 0.00 13.75 3.18 2.95 0.01 22.75 3.80 3.57 0.00 5.00 0.22 0.08 0.00 14.00 3.22 2.98 0.01 23.00 3.81 3.58 0.00 5.25 0.23 0.09 0.00 14.25 3.25 3.02 0.01 23.25 3.82 3.59 0.00 5.50 0.25 0.10 0.00 14.50 3.28 3.05 0.01 23.50 3.83 3.60 0.00 5.75 0.26 0.12 0.00 14.75 3.31 3.08 0.01 23.75 3.84 3.61 0.00 6.00 0.28 0.13 0.00 15.00 3.34 3.11 0.01 24.00 3.85 3.62 0.00 6.25 0.29 0.14 0.00 15.25 3.36 3.13 0.01 6.50 0.31 0.15 0.00 15.50 3.39 3.15 0.01 6.75 0.33 0.17 0.00 15.75 3.41 3.18 0.01 7.00 0.34 0.18 0.00 16.00 3.43 3.20 0.01 7.25 0.36 0.20 0.00 16.25 3.45 3.22 0.00 7.50 0.38 0.21 0.00 16.50 3.47 3.24 0.00 7.75 0.40 0.23 0.00 16.75 3.49 3.26 0.00 8.00 0.42 0.25 0.00 17.00 3.51 3.27 0.00 8.25 0.44 0.27 0.00 17.25 3.53 3.29 0.00 8.50 0.47 0.29 0.01 17.50 3.54 3.31 0.00 8.75 0.49 0.31 0.01 17.75 3.56 3.32 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 135 Summary for Subcatchment DA 2: Drainage Area 2 Runoff = 0.06 cfs @ 11.96 hrs, Volume= 0.003 af, Depth> 3.62" Routed to Pond RCVR 2 : RCVR 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.010 98 Paved parking, HSG D 0.010 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.8 35 0.0100 0.70 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 2: Drainage Area 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 136 Subcatchment DA 2: Drainage Area 2 Hydrograph 0.065 Runoff 0.06 cfs 0.06 extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" 0.055 Runoff Area=0.010 ac Runoff Volume=0.003 af 0.05 Runoff Depth>3.62" Flow Length=35' 0.045 Slope=0.0100 '/' 0.04 Tc=0.8 min CN=98 Flow (cfs) 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 137 Hydrograph for Subcatchment DA 2: Drainage Area 2 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.33 0.00 18.00 3.57 3.34 0.00 0.25 0.01 0.00 0.00 9.25 0.54 0.36 0.00 18.25 3.59 3.36 0.00 0.50 0.02 0.00 0.00 9.50 0.57 0.38 0.00 18.50 3.60 3.37 0.00 0.75 0.03 0.00 0.00 9.75 0.60 0.41 0.00 18.75 3.62 3.38 0.00 1.00 0.04 0.00 0.00 10.00 0.64 0.45 0.00 19.00 3.63 3.40 0.00 1.25 0.05 0.00 0.00 10.25 0.68 0.48 0.00 19.25 3.65 3.41 0.00 1.50 0.06 0.00 0.00 10.50 0.72 0.52 0.00 19.50 3.66 3.42 0.00 1.75 0.07 0.00 0.00 10.75 0.77 0.57 0.00 19.75 3.67 3.44 0.00 2.00 0.08 0.01 0.00 11.00 0.83 0.62 0.00 20.00 3.68 3.45 0.00 2.25 0.09 0.01 0.00 11.25 0.90 0.69 0.00 20.25 3.70 3.46 0.00 2.50 0.10 0.01 0.00 11.50 0.99 0.78 0.01 20.50 3.71 3.47 0.00 2.75 0.11 0.02 0.00 11.75 1.29 1.07 0.01 20.75 3.72 3.48 0.00 3.00 0.12 0.02 0.00 12.00 2.13 1.90 0.05 21.00 3.73 3.50 0.00 3.25 0.13 0.03 0.00 12.25 2.60 2.37 0.01 21.25 3.74 3.51 0.00 3.50 0.14 0.03 0.00 12.50 2.88 2.65 0.01 21.50 3.75 3.52 0.00 3.75 0.16 0.04 0.00 12.75 2.97 2.73 0.00 21.75 3.76 3.53 0.00 4.00 0.17 0.05 0.00 13.00 3.03 2.80 0.00 22.00 3.77 3.54 0.00 4.25 0.18 0.06 0.00 13.25 3.09 2.86 0.00 22.25 3.78 3.55 0.00 4.50 0.19 0.06 0.00 13.50 3.14 2.90 0.00 22.50 3.79 3.56 0.00 4.75 0.21 0.07 0.00 13.75 3.18 2.95 0.00 22.75 3.80 3.57 0.00 5.00 0.22 0.08 0.00 14.00 3.22 2.98 0.00 23.00 3.81 3.58 0.00 5.25 0.23 0.09 0.00 14.25 3.25 3.02 0.00 23.25 3.82 3.59 0.00 5.50 0.25 0.10 0.00 14.50 3.28 3.05 0.00 23.50 3.83 3.60 0.00 5.75 0.26 0.12 0.00 14.75 3.31 3.08 0.00 23.75 3.84 3.61 0.00 6.00 0.28 0.13 0.00 15.00 3.34 3.11 0.00 24.00 3.85 3.62 0.00 6.25 0.29 0.14 0.00 15.25 3.36 3.13 0.00 6.50 0.31 0.15 0.00 15.50 3.39 3.15 0.00 6.75 0.33 0.17 0.00 15.75 3.41 3.18 0.00 7.00 0.34 0.18 0.00 16.00 3.43 3.20 0.00 7.25 0.36 0.20 0.00 16.25 3.45 3.22 0.00 7.50 0.38 0.21 0.00 16.50 3.47 3.24 0.00 7.75 0.40 0.23 0.00 16.75 3.49 3.26 0.00 8.00 0.42 0.25 0.00 17.00 3.51 3.27 0.00 8.25 0.44 0.27 0.00 17.25 3.53 3.29 0.00 8.50 0.47 0.29 0.00 17.50 3.54 3.31 0.00 8.75 0.49 0.31 0.00 17.75 3.56 3.32 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 138 Summary for Subcatchment DA 3: Drainage Area 3 Runoff = 0.70 cfs @ 12.05 hrs, Volume= 0.044 af, Depth> 3.50" Routed to Pond RCVR 3 : RCVR 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.140 98 Paved parking, HSG D 0.010 80 >75% Grass cover, Good, HSG D 0.150 97 Weighted Average 0.010 6.67% Pervious Area 0.140 93.33% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 19 0.0100 0.05 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 1.2 56 0.0100 0.77 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" 7.2 75 Total Subcatchment DA 3: Drainage Area 3

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 139 Subcatchment DA 3: Drainage Area 3 Hydrograph Runoff 0.75 0.70 cfs 0.7 extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" 0.65 Runoff Area=0.150 ac 0.6 Runoff Volume=0.044 af Runoff Depth>3.50" 0.55 Flow Length=75' 0.5 Slope=0.0100 '/' Tc=7.2 min 0.45 CN=97 Flow (cfs) 0.4 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 140 Hydrograph for Subcatchment DA 3: Drainage Area 3 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.27 0.01 18.00 3.57 3.23 0.01 0.25 0.01 0.00 0.00 9.25 0.54 0.29 0.01 18.25 3.59 3.24 0.01 0.50 0.02 0.00 0.00 9.50 0.57 0.32 0.02 18.50 3.60 3.26 0.01 0.75 0.03 0.00 0.00 9.75 0.60 0.35 0.02 18.75 3.62 3.27 0.01 1.00 0.04 0.00 0.00 10.00 0.64 0.38 0.02 19.00 3.63 3.29 0.01 1.25 0.05 0.00 0.00 10.25 0.68 0.41 0.02 19.25 3.65 3.30 0.01 1.50 0.06 0.00 0.00 10.50 0.72 0.45 0.02 19.50 3.66 3.31 0.01 1.75 0.07 0.00 0.00 10.75 0.77 0.49 0.03 19.75 3.67 3.32 0.01 2.00 0.08 0.00 0.00 11.00 0.83 0.54 0.03 20.00 3.68 3.34 0.01 2.25 0.09 0.00 0.00 11.25 0.90 0.61 0.04 20.25 3.70 3.35 0.01 2.50 0.10 0.00 0.00 11.50 0.99 0.70 0.05 20.50 3.71 3.36 0.01 2.75 0.11 0.01 0.00 11.75 1.29 0.98 0.17 20.75 3.72 3.37 0.01 3.00 0.12 0.01 0.00 12.00 2.13 1.80 0.55 21.00 3.73 3.38 0.01 3.25 0.13 0.01 0.00 12.25 2.60 2.27 0.27 21.25 3.74 3.39 0.01 3.50 0.14 0.02 0.00 12.50 2.88 2.54 0.16 21.50 3.75 3.40 0.01 3.75 0.16 0.02 0.00 12.75 2.97 2.62 0.05 21.75 3.76 3.42 0.01 4.00 0.17 0.03 0.00 13.00 3.03 2.69 0.04 22.00 3.77 3.43 0.01 4.25 0.18 0.03 0.00 13.25 3.09 2.75 0.03 22.25 3.78 3.44 0.01 4.50 0.19 0.04 0.00 13.50 3.14 2.79 0.03 22.50 3.79 3.45 0.01 4.75 0.21 0.05 0.00 13.75 3.18 2.84 0.03 22.75 3.80 3.46 0.01 5.00 0.22 0.05 0.00 14.00 3.22 2.87 0.02 23.00 3.81 3.47 0.01 5.25 0.23 0.06 0.00 14.25 3.25 2.91 0.02 23.25 3.82 3.47 0.01 5.50 0.25 0.07 0.01 14.50 3.28 2.94 0.02 23.50 3.83 3.48 0.01 5.75 0.26 0.08 0.01 14.75 3.31 2.97 0.02 23.75 3.84 3.49 0.01 6.00 0.28 0.09 0.01 15.00 3.34 2.99 0.02 24.00 3.85 3.50 0.01 6.25 0.29 0.10 0.01 15.25 3.36 3.02 0.02 6.50 0.31 0.11 0.01 15.50 3.39 3.04 0.01 6.75 0.33 0.12 0.01 15.75 3.41 3.06 0.01 7.00 0.34 0.13 0.01 16.00 3.43 3.09 0.01 7.25 0.36 0.15 0.01 16.25 3.45 3.11 0.01 7.50 0.38 0.16 0.01 16.50 3.47 3.13 0.01 7.75 0.40 0.18 0.01 16.75 3.49 3.14 0.01 8.00 0.42 0.19 0.01 17.00 3.51 3.16 0.01 8.25 0.44 0.21 0.01 17.25 3.53 3.18 0.01 8.50 0.47 0.23 0.01 17.50 3.54 3.20 0.01 8.75 0.49 0.25 0.01 17.75 3.56 3.21 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 141 Summary for Subcatchment DA 4: Drainage Area 4 Runoff = 0.38 cfs @ 12.04 hrs, Volume= 0.023 af, Depth> 3.39" Routed to Pond RCVR 4 : RCVR 4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.070 98 Paved parking, HSG D 0.010 80 >75% Grass cover, Good, HSG D 0.080 96 Weighted Average 0.010 12.50% Pervious Area 0.070 87.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 20 0.0100 0.05 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment DA 4: Drainage Area 4

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 142 Subcatchment DA 4: Drainage Area 4 Hydrograph 0.42 Runoff 0.4 0.38 cfs 0.38 extreme_precip_tables_output (29) 24-hr S1 25-yr 0.36 Rainfall=3.85" 0.34 Runoff Area=0.080 ac Runoff Volume=0.023 af 0.32 Runoff Depth>3.39" 0.3 Flow Length=20' 0.28 Slope=0.0100 '/' 0.26 Tc=6.3 min 0.24 CN=96 Flow (cfs) 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 143 Hydrograph for Subcatchment DA 4: Drainage Area 4 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.22 0.01 18.00 3.57 3.12 0.00 0.25 0.01 0.00 0.00 9.25 0.54 0.24 0.01 18.25 3.59 3.13 0.00 0.50 0.02 0.00 0.00 9.50 0.57 0.26 0.01 18.50 3.60 3.15 0.00 0.75 0.03 0.00 0.00 9.75 0.60 0.29 0.01 18.75 3.62 3.16 0.00 1.00 0.04 0.00 0.00 10.00 0.64 0.32 0.01 19.00 3.63 3.18 0.00 1.25 0.05 0.00 0.00 10.25 0.68 0.35 0.01 19.25 3.65 3.19 0.00 1.50 0.06 0.00 0.00 10.50 0.72 0.38 0.01 19.50 3.66 3.20 0.00 1.75 0.07 0.00 0.00 10.75 0.77 0.43 0.01 19.75 3.67 3.21 0.00 2.00 0.08 0.00 0.00 11.00 0.83 0.48 0.02 20.00 3.68 3.23 0.00 2.25 0.09 0.00 0.00 11.25 0.90 0.54 0.02 20.25 3.70 3.24 0.00 2.50 0.10 0.00 0.00 11.50 0.99 0.62 0.03 20.50 3.71 3.25 0.00 2.75 0.11 0.00 0.00 11.75 1.29 0.89 0.09 20.75 3.72 3.26 0.00 3.00 0.12 0.00 0.00 12.00 2.13 1.70 0.33 21.00 3.73 3.27 0.00 3.25 0.13 0.01 0.00 12.25 2.60 2.16 0.14 21.25 3.74 3.28 0.00 3.50 0.14 0.01 0.00 12.50 2.88 2.43 0.08 21.50 3.75 3.29 0.00 3.75 0.16 0.01 0.00 12.75 2.97 2.52 0.03 21.75 3.76 3.31 0.00 4.00 0.17 0.01 0.00 13.00 3.03 2.59 0.02 22.00 3.77 3.32 0.00 4.25 0.18 0.02 0.00 13.25 3.09 2.64 0.02 22.25 3.78 3.33 0.00 4.50 0.19 0.02 0.00 13.50 3.14 2.69 0.01 22.50 3.79 3.34 0.00 4.75 0.21 0.03 0.00 13.75 3.18 2.73 0.01 22.75 3.80 3.35 0.00 5.00 0.22 0.03 0.00 14.00 3.22 2.77 0.01 23.00 3.81 3.35 0.00 5.25 0.23 0.04 0.00 14.25 3.25 2.80 0.01 23.25 3.82 3.36 0.00 5.50 0.25 0.05 0.00 14.50 3.28 2.83 0.01 23.50 3.83 3.37 0.00 5.75 0.26 0.05 0.00 14.75 3.31 2.86 0.01 23.75 3.84 3.38 0.00 6.00 0.28 0.06 0.00 15.00 3.34 2.89 0.01 24.00 3.85 3.39 0.00 6.25 0.29 0.07 0.00 15.25 3.36 2.91 0.01 6.50 0.31 0.08 0.00 15.50 3.39 2.93 0.01 6.75 0.33 0.09 0.00 15.75 3.41 2.96 0.01 7.00 0.34 0.10 0.00 16.00 3.43 2.98 0.01 7.25 0.36 0.11 0.00 16.25 3.45 3.00 0.01 7.50 0.38 0.12 0.00 16.50 3.47 3.02 0.01 7.75 0.40 0.14 0.00 16.75 3.49 3.04 0.01 8.00 0.42 0.15 0.00 17.00 3.51 3.05 0.01 8.25 0.44 0.17 0.00 17.25 3.53 3.07 0.01 8.50 0.47 0.18 0.01 17.50 3.54 3.09 0.01 8.75 0.49 0.20 0.01 17.75 3.56 3.10 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 144 Summary for Subcatchment DA 5: Drainage Area 5 Runoff = 0.29 cfs @ 11.98 hrs, Volume= 0.015 af, Depth> 3.62" Routed to Pond RCVR 5 : RCVR 5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.050 98 Paved parking, HSG D 0.050 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.7 60 0.0050 0.59 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 5: Drainage Area 5

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 145 Subcatchment DA 5: Drainage Area 5 Hydrograph 0.32 Runoff 0.29 cfs 0.3 extreme_precip_tables_output (29) 24-hr S1 25-yr 0.28 Rainfall=3.85" Runoff Area=0.050 ac 0.26 Runoff Volume=0.015 af 0.24 Runoff Depth>3.62" Flow Length=60' 0.22 Slope=0.0050 '/' 0.2 Tc=1.7 min CN=98 Flow (cfs) 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 146 Hydrograph for Subcatchment DA 5: Drainage Area 5 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.33 0.00 18.00 3.57 3.34 0.00 0.25 0.01 0.00 0.00 9.25 0.54 0.36 0.01 18.25 3.59 3.36 0.00 0.50 0.02 0.00 0.00 9.50 0.57 0.38 0.01 18.50 3.60 3.37 0.00 0.75 0.03 0.00 0.00 9.75 0.60 0.41 0.01 18.75 3.62 3.38 0.00 1.00 0.04 0.00 0.00 10.00 0.64 0.45 0.01 19.00 3.63 3.40 0.00 1.25 0.05 0.00 0.00 10.25 0.68 0.48 0.01 19.25 3.65 3.41 0.00 1.50 0.06 0.00 0.00 10.50 0.72 0.52 0.01 19.50 3.66 3.42 0.00 1.75 0.07 0.00 0.00 10.75 0.77 0.57 0.01 19.75 3.67 3.44 0.00 2.00 0.08 0.01 0.00 11.00 0.83 0.62 0.01 20.00 3.68 3.45 0.00 2.25 0.09 0.01 0.00 11.25 0.90 0.69 0.02 20.25 3.70 3.46 0.00 2.50 0.10 0.01 0.00 11.50 0.99 0.78 0.02 20.50 3.71 3.47 0.00 2.75 0.11 0.02 0.00 11.75 1.29 1.07 0.07 20.75 3.72 3.48 0.00 3.00 0.12 0.02 0.00 12.00 2.13 1.90 0.28 21.00 3.73 3.50 0.00 3.25 0.13 0.03 0.00 12.25 2.60 2.37 0.07 21.25 3.74 3.51 0.00 3.50 0.14 0.03 0.00 12.50 2.88 2.65 0.05 21.50 3.75 3.52 0.00 3.75 0.16 0.04 0.00 12.75 2.97 2.73 0.02 21.75 3.76 3.53 0.00 4.00 0.17 0.05 0.00 13.00 3.03 2.80 0.01 22.00 3.77 3.54 0.00 4.25 0.18 0.06 0.00 13.25 3.09 2.86 0.01 22.25 3.78 3.55 0.00 4.50 0.19 0.06 0.00 13.50 3.14 2.90 0.01 22.50 3.79 3.56 0.00 4.75 0.21 0.07 0.00 13.75 3.18 2.95 0.01 22.75 3.80 3.57 0.00 5.00 0.22 0.08 0.00 14.00 3.22 2.98 0.01 23.00 3.81 3.58 0.00 5.25 0.23 0.09 0.00 14.25 3.25 3.02 0.01 23.25 3.82 3.59 0.00 5.50 0.25 0.10 0.00 14.50 3.28 3.05 0.01 23.50 3.83 3.60 0.00 5.75 0.26 0.12 0.00 14.75 3.31 3.08 0.01 23.75 3.84 3.61 0.00 6.00 0.28 0.13 0.00 15.00 3.34 3.11 0.01 24.00 3.85 3.62 0.00 6.25 0.29 0.14 0.00 15.25 3.36 3.13 0.00 6.50 0.31 0.15 0.00 15.50 3.39 3.15 0.00 6.75 0.33 0.17 0.00 15.75 3.41 3.18 0.00 7.00 0.34 0.18 0.00 16.00 3.43 3.20 0.00 7.25 0.36 0.20 0.00 16.25 3.45 3.22 0.00 7.50 0.38 0.21 0.00 16.50 3.47 3.24 0.00 7.75 0.40 0.23 0.00 16.75 3.49 3.26 0.00 8.00 0.42 0.25 0.00 17.00 3.51 3.27 0.00 8.25 0.44 0.27 0.00 17.25 3.53 3.29 0.00 8.50 0.47 0.29 0.00 17.50 3.54 3.31 0.00 8.75 0.49 0.31 0.00 17.75 3.56 3.32 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 147 Summary for Subcatchment DA 6: Drainage Area 6 Runoff = 0.41 cfs @ 12.16 hrs, Volume= 0.031 af, Depth> 2.49" Routed to Pond SWALE : SWALE Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Area (ac) CN Description 0.060 98 Paved parking, HSG D 0.090 80 >75% Grass cover, Good, HSG D 0.150 87 Weighted Average 0.090 60.00% Pervious Area 0.060 40.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 40 0.0045 0.04 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment DA 6: Drainage Area 6

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 148 Subcatchment DA 6: Drainage Area 6 Hydrograph Runoff 0.44 0.41 cfs 0.42 extreme_precip_tables_output (29) 24-hr S1 25-yr 0.4 Rainfall=3.85" 0.38 Runoff Area=0.150 ac 0.36 Runoff Volume=0.031 af 0.34 Runoff Depth>2.49" 0.32 Flow Length=40' 0.3 Slope=0.0045 '/' 0.28 Tc=15.0 min 0.26 CN=87 Flow (cfs) 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 149 Hydrograph for Subcatchment DA 6: Drainage Area 6 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.52 0.03 0.00 18.00 3.57 2.25 0.01 0.25 0.01 0.00 0.00 9.25 0.54 0.03 0.00 18.25 3.59 2.26 0.01 0.50 0.02 0.00 0.00 9.50 0.57 0.04 0.00 18.50 3.60 2.28 0.01 0.75 0.03 0.00 0.00 9.75 0.60 0.05 0.01 18.75 3.62 2.29 0.01 1.00 0.04 0.00 0.00 10.00 0.64 0.06 0.01 19.00 3.63 2.30 0.01 1.25 0.05 0.00 0.00 10.25 0.68 0.08 0.01 19.25 3.65 2.31 0.01 1.50 0.06 0.00 0.00 10.50 0.72 0.09 0.01 19.50 3.66 2.33 0.01 1.75 0.07 0.00 0.00 10.75 0.77 0.11 0.01 19.75 3.67 2.34 0.01 2.00 0.08 0.00 0.00 11.00 0.83 0.14 0.01 20.00 3.68 2.35 0.01 2.25 0.09 0.00 0.00 11.25 0.90 0.17 0.02 20.25 3.70 2.36 0.01 2.50 0.10 0.00 0.00 11.50 0.99 0.22 0.02 20.50 3.71 2.37 0.01 2.75 0.11 0.00 0.00 11.75 1.29 0.39 0.07 20.75 3.72 2.38 0.01 3.00 0.12 0.00 0.00 12.00 2.13 1.01 0.19 21.00 3.73 2.39 0.01 3.25 0.13 0.00 0.00 12.25 2.60 1.40 0.34 21.25 3.74 2.40 0.01 3.50 0.14 0.00 0.00 12.50 2.88 1.63 0.18 21.50 3.75 2.41 0.01 3.75 0.16 0.00 0.00 12.75 2.97 1.71 0.08 21.75 3.76 2.42 0.01 4.00 0.17 0.00 0.00 13.00 3.03 1.77 0.04 22.00 3.77 2.43 0.01 4.25 0.18 0.00 0.00 13.25 3.09 1.82 0.03 22.25 3.78 2.44 0.01 4.50 0.19 0.00 0.00 13.50 3.14 1.86 0.03 22.50 3.79 2.45 0.01 4.75 0.21 0.00 0.00 13.75 3.18 1.90 0.02 22.75 3.80 2.46 0.01 5.00 0.22 0.00 0.00 14.00 3.22 1.93 0.02 23.00 3.81 2.47 0.01 5.25 0.23 0.00 0.00 14.25 3.25 1.96 0.02 23.25 3.82 2.47 0.01 5.50 0.25 0.00 0.00 14.50 3.28 1.99 0.02 23.50 3.83 2.48 0.01 5.75 0.26 0.00 0.00 14.75 3.31 2.01 0.02 23.75 3.84 2.49 0.01 6.00 0.28 0.00 0.00 15.00 3.34 2.04 0.02 24.00 3.85 2.50 0.01 6.25 0.29 0.00 0.00 15.25 3.36 2.06 0.01 6.50 0.31 0.00 0.00 15.50 3.39 2.08 0.01 6.75 0.33 0.00 0.00 15.75 3.41 2.10 0.01 7.00 0.34 0.00 0.00 16.00 3.43 2.12 0.01 7.25 0.36 0.00 0.00 16.25 3.45 2.14 0.01 7.50 0.38 0.00 0.00 16.50 3.47 2.16 0.01 7.75 0.40 0.01 0.00 16.75 3.49 2.17 0.01 8.00 0.42 0.01 0.00 17.00 3.51 2.19 0.01 8.25 0.44 0.01 0.00 17.25 3.53 2.21 0.01 8.50 0.47 0.02 0.00 17.50 3.54 2.22 0.01 8.75 0.49 0.02 0.00 17.75 3.56 2.23 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 150 Summary for Pond EX RCVR: EX RCVR Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 2.94" for 25-yr event Inflow = 1.14 cfs @ 12.06 hrs, Volume= 0.123 af Outflow = 1.14 cfs @ 12.06 hrs, Volume= 0.123 af, Atten= 0%, Lag= 0.0 min Primary = 1.14 cfs @ 12.06 hrs, Volume= 0.123 af Routed to Link POST : Post Development Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.32' @ 12.06 hrs Device Routing Invert Outlet Devices #1 Primary 899.60' 12.0" Round 12" HDPE L= 121.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 899.60' / 899.23' S= 0.0031 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf Primary OutFlow Max=1.13 cfs @ 12.06 hrs HW=900.31' TW=0.00' (Dynamic Tailwater) 1=12" HDPE (Barrel Controls 1.13 cfs @ 2.64 fps) Pond EX RCVR: EX RCVR 12" HDPE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 151 Pond EX RCVR: EX RCVR Hydrograph Inflow 1.14 cfs Primary 1.14 cfs Inflow Area=0.500 ac 1 Peak Elev=900.32' 12.0" Round Culvert Flow (cfs) n=0.013 L=121.0' S=0.0031 '/' 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 152 Pond EX RCVR: EX RCVR Stage-Discharge Primary Elevation (feet) 900 12" HDPE 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 153 Pond EX RCVR: EX RCVR Stage-Area-Storage Storage Elevation (feet) 900 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 154 Hydrograph for Pond EX RCVR: EX RCVR Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 899.60 0.00 9.00 0.02 899.69 0.02 18.00 0.03 899.72 0.03 0.25 0.00 899.60 0.00 9.25 0.02 899.70 0.02 18.25 0.03 899.72 0.03 0.50 0.00 899.60 0.00 9.50 0.02 899.70 0.02 18.50 0.03 899.71 0.03 0.75 0.00 899.60 0.00 9.75 0.03 899.71 0.03 18.75 0.03 899.71 0.03 1.00 0.00 899.60 0.00 10.00 0.03 899.71 0.03 19.00 0.03 899.71 0.03 1.25 0.00 899.61 0.00 10.25 0.03 899.72 0.03 19.25 0.03 899.71 0.03 1.50 0.00 899.61 0.00 10.50 0.04 899.72 0.04 19.50 0.03 899.71 0.03 1.75 0.00 899.62 0.00 10.75 0.04 899.73 0.04 19.75 0.03 899.71 0.03 2.00 0.00 899.63 0.00 11.00 0.05 899.74 0.05 20.00 0.03 899.71 0.03 2.25 0.00 899.63 0.00 11.25 0.06 899.76 0.06 20.25 0.02 899.70 0.02 2.50 0.00 899.63 0.00 11.50 0.09 899.79 0.09 20.50 0.02 899.70 0.02 2.75 0.00 899.64 0.00 11.75 0.29 899.94 0.29 20.75 0.02 899.70 0.02 3.00 0.00 899.64 0.00 12.00 1.05 900.28 1.05 21.00 0.02 899.70 0.02 3.25 0.00 899.64 0.00 12.25 0.87 900.22 0.87 21.25 0.02 899.70 0.02 3.50 0.00 899.65 0.00 12.50 0.69 900.14 0.69 21.50 0.02 899.70 0.02 3.75 0.00 899.65 0.00 12.75 0.40 900.01 0.40 21.75 0.02 899.70 0.02 4.00 0.01 899.65 0.01 13.00 0.25 899.92 0.25 22.00 0.02 899.70 0.02 4.25 0.01 899.65 0.01 13.25 0.18 899.87 0.18 22.25 0.02 899.70 0.02 4.50 0.01 899.65 0.01 13.50 0.13 899.83 0.13 22.50 0.02 899.70 0.02 4.75 0.01 899.66 0.01 13.75 0.11 899.81 0.11 22.75 0.02 899.69 0.02 5.00 0.01 899.66 0.01 14.00 0.09 899.79 0.09 23.00 0.02 899.69 0.02 5.25 0.01 899.66 0.01 14.25 0.08 899.78 0.08 23.25 0.02 899.69 0.02 5.50 0.01 899.66 0.01 14.50 0.07 899.77 0.07 23.50 0.02 899.69 0.02 5.75 0.01 899.66 0.01 14.75 0.06 899.76 0.06 23.75 0.02 899.69 0.02 6.00 0.01 899.67 0.01 15.00 0.06 899.76 0.06 24.00 0.02 899.69 0.02 6.25 0.01 899.67 0.01 15.25 0.05 899.75 0.05 6.50 0.01 899.67 0.01 15.50 0.05 899.75 0.05 6.75 0.01 899.67 0.01 15.75 0.05 899.74 0.05 7.00 0.01 899.67 0.01 16.00 0.05 899.74 0.05 7.25 0.01 899.68 0.01 16.25 0.04 899.74 0.04 7.50 0.01 899.68 0.01 16.50 0.04 899.73 0.04 7.75 0.01 899.68 0.01 16.75 0.04 899.73 0.04 8.00 0.01 899.68 0.01 17.00 0.04 899.73 0.04 8.25 0.02 899.68 0.02 17.25 0.04 899.72 0.04 8.50 0.02 899.69 0.02 17.50 0.03 899.72 0.03 8.75 0.02 899.69 0.02 17.75 0.03 899.72 0.03

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 155 Summary for Pond RCVR 1: RCVR 1 Inflow Area = 0.340 ac, 70.59% Impervious, Inflow Depth > 2.68" for 25-yr event Inflow = 0.62 cfs @ 12.22 hrs, Volume= 0.076 af Outflow = 0.62 cfs @ 12.22 hrs, Volume= 0.076 af, Atten= 0%, Lag= 0.0 min Primary = 0.62 cfs @ 12.22 hrs, Volume= 0.076 af Routed to Pond RCVR 2 : RCVR 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.27' @ 12.11 hrs Device Routing Invert Outlet Devices #1 Primary 900.56' 8.0" Round RCVR 1 to RCVR 2 L= 59.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.56' / 900.32' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.60 cfs @ 12.22 hrs HW=901.25' TW=900.98' (Dynamic Tailwater) 1=RCVR 1 to RCVR 2 (Outlet Controls 0.60 cfs @ 2.07 fps) Pond RCVR 1: RCVR 1 RCVR 1 to RCVR 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 156 Pond RCVR 1: RCVR 1 Hydrograph Inflow 0.62 cfs Primary 0.62 cfs 0.65 0.6 Inflow Area=0.340 ac 0.55 Peak Elev=901.27' 0.5 8.0" 0.45 0.4 Round Culvert Flow (cfs) 0.35 n=0.013 0.3 L=59.0' 0.25 0.2 S=0.0041 '/' 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 157 Pond RCVR 1: RCVR 1 Stage-Discharge 901.25 Primary 901.2 901.15 901.1 901.05 901 Elevation (feet) 900.95 900.9 900.85 900.8 900.75 900.7 900.65 900.6 RCVR 1 to RCVR 2 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 158 Pond RCVR 1: RCVR 1 Stage-Area-Storage 901.25 Storage 901.2 901.15 901.1 901.05 901 Elevation (feet) 900.95 900.9 900.85 900.8 900.75 900.7 900.65 900.6 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 159 Hydrograph for Pond RCVR 1: RCVR 1 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.56 0.00 9.00 0.01 900.62 0.01 18.00 0.02 900.67 0.02 0.25 0.00 900.56 0.00 9.25 0.01 900.62 0.01 18.25 0.02 900.66 0.02 0.50 0.00 900.56 0.00 9.50 0.01 900.62 0.01 18.50 0.02 900.66 0.02 0.75 0.00 900.56 0.00 9.75 0.01 900.62 0.01 18.75 0.02 900.66 0.02 1.00 0.00 900.56 0.00 10.00 0.01 900.63 0.01 19.00 0.02 900.66 0.02 1.25 0.00 900.57 0.00 10.25 0.01 900.63 0.01 19.25 0.02 900.66 0.02 1.50 0.00 900.57 0.00 10.50 0.01 900.64 0.01 19.50 0.02 900.66 0.02 1.75 0.00 900.58 0.00 10.75 0.01 900.64 0.01 19.75 0.02 900.66 0.02 2.00 0.00 900.58 0.00 11.00 0.01 900.65 0.01 20.00 0.02 900.65 0.02 2.25 0.00 900.58 0.00 11.25 0.02 900.66 0.02 20.25 0.02 900.65 0.02 2.50 0.00 900.58 0.00 11.50 0.03 900.68 0.03 20.50 0.02 900.65 0.02 2.75 0.00 900.59 0.00 11.75 0.11 900.81 0.11 20.75 0.02 900.65 0.02 3.00 0.00 900.59 0.00 12.00 0.45 901.14 0.45 21.00 0.02 900.65 0.02 3.25 0.00 900.59 0.00 12.25 0.59 901.25 0.59 21.25 0.02 900.65 0.02 3.50 0.00 900.59 0.00 12.50 0.52 901.16 0.52 21.50 0.02 900.65 0.02 3.75 0.00 900.59 0.00 12.75 0.34 901.01 0.34 21.75 0.01 900.65 0.01 4.00 0.00 900.59 0.00 13.00 0.21 900.90 0.21 22.00 0.01 900.65 0.01 4.25 0.00 900.59 0.00 13.25 0.14 900.83 0.14 22.25 0.01 900.65 0.01 4.50 0.00 900.59 0.00 13.50 0.10 900.79 0.10 22.50 0.01 900.64 0.01 4.75 0.00 900.60 0.00 13.75 0.08 900.76 0.08 22.75 0.01 900.64 0.01 5.00 0.00 900.60 0.00 14.00 0.07 900.74 0.07 23.00 0.01 900.64 0.01 5.25 0.00 900.60 0.00 14.25 0.06 900.73 0.06 23.25 0.01 900.64 0.01 5.50 0.00 900.60 0.00 14.50 0.05 900.72 0.05 23.50 0.01 900.64 0.01 5.75 0.00 900.60 0.00 14.75 0.05 900.71 0.05 23.75 0.01 900.64 0.01 6.00 0.00 900.60 0.00 15.00 0.04 900.70 0.04 24.00 0.01 900.64 0.01 6.25 0.00 900.60 0.00 15.25 0.04 900.70 0.04 6.50 0.00 900.60 0.00 15.50 0.04 900.69 0.04 6.75 0.00 900.60 0.00 15.75 0.03 900.69 0.03 7.00 0.00 900.60 0.00 16.00 0.03 900.69 0.03 7.25 0.00 900.61 0.00 16.25 0.03 900.68 0.03 7.50 0.00 900.61 0.00 16.50 0.03 900.68 0.03 7.75 0.00 900.61 0.00 16.75 0.03 900.68 0.03 8.00 0.00 900.61 0.00 17.00 0.03 900.67 0.03 8.25 0.00 900.61 0.00 17.25 0.02 900.67 0.02 8.50 0.01 900.61 0.01 17.50 0.02 900.67 0.02 8.75 0.01 900.61 0.01 17.75 0.02 900.67 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 160 Summary for Pond RCVR 2: RCVR 2 Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 2.94" for 25-yr event Inflow = 1.14 cfs @ 12.06 hrs, Volume= 0.123 af Outflow = 1.14 cfs @ 12.06 hrs, Volume= 0.123 af, Atten= 0%, Lag= 0.0 min Primary = 1.14 cfs @ 12.06 hrs, Volume= 0.123 af Routed to Pond EX RCVR : EX RCVR Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.12' @ 12.06 hrs Device Routing Invert Outlet Devices #1 Primary 900.32' 8.0" Round RCVR 2 to EX RCVR L= 72.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.32' / 899.60' S= 0.0100 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=1.11 cfs @ 12.06 hrs HW=901.12' TW=900.31' (Dynamic Tailwater) 1=RCVR 2 to EX RCVR (Outlet Controls 1.11 cfs @ 3.37 fps) Pond RCVR 2: RCVR 2 RCVR 2 to EX RCVR

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 161 Pond RCVR 2: RCVR 2 Hydrograph Inflow 1.14 cfs Primary 1.14 cfs Inflow Area=0.500 ac 1 Peak Elev=901.12' 8.0" Round Culvert Flow (cfs) n=0.013 L=72.0' S=0.0100 '/' 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 162 Pond RCVR 2: RCVR 2 Stage-Discharge 901.1 Primary 901.05 901 900.95 900.9 900.85 Elevation (feet) 900.8 900.75 900.7 900.65 900.6 900.55 900.5 900.45 900.4 900.35 RCVR 2 to EX RCVR 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 163 Pond RCVR 2: RCVR 2 Stage-Area-Storage 901.1 Storage 901.05 901 900.95 900.9 900.85 Elevation (feet) 900.8 900.75 900.7 900.65 900.6 900.55 900.5 900.45 900.4 900.35 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 164 Hydrograph for Pond RCVR 2: RCVR 2 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.32 0.00 9.00 0.02 900.40 0.02 18.00 0.03 900.42 0.03 0.25 0.00 900.32 0.00 9.25 0.02 900.40 0.02 18.25 0.03 900.42 0.03 0.50 0.00 900.32 0.00 9.50 0.02 900.41 0.02 18.50 0.03 900.42 0.03 0.75 0.00 900.32 0.00 9.75 0.03 900.41 0.03 18.75 0.03 900.42 0.03 1.00 0.00 900.32 0.00 10.00 0.03 900.42 0.03 19.00 0.03 900.42 0.03 1.25 0.00 900.33 0.00 10.25 0.03 900.42 0.03 19.25 0.03 900.41 0.03 1.50 0.00 900.33 0.00 10.50 0.04 900.43 0.04 19.50 0.03 900.41 0.03 1.75 0.00 900.34 0.00 10.75 0.04 900.44 0.04 19.75 0.03 900.41 0.03 2.00 0.00 900.34 0.00 11.00 0.05 900.45 0.05 20.00 0.03 900.41 0.03 2.25 0.00 900.35 0.00 11.25 0.06 900.46 0.06 20.25 0.02 900.41 0.02 2.50 0.00 900.35 0.00 11.50 0.09 900.49 0.09 20.50 0.02 900.41 0.02 2.75 0.00 900.35 0.00 11.75 0.29 900.64 0.29 20.75 0.02 900.41 0.02 3.00 0.00 900.35 0.00 12.00 1.05 901.04 1.05 21.00 0.02 900.41 0.02 3.25 0.00 900.36 0.00 12.25 0.87 900.97 0.87 21.25 0.02 900.41 0.02 3.50 0.00 900.36 0.00 12.50 0.69 900.86 0.69 21.50 0.02 900.41 0.02 3.75 0.00 900.36 0.00 12.75 0.40 900.71 0.40 21.75 0.02 900.40 0.02 4.00 0.01 900.36 0.01 13.00 0.25 900.62 0.25 22.00 0.02 900.40 0.02 4.25 0.01 900.36 0.01 13.25 0.18 900.56 0.18 22.25 0.02 900.40 0.02 4.50 0.01 900.37 0.01 13.50 0.13 900.53 0.13 22.50 0.02 900.40 0.02 4.75 0.01 900.37 0.01 13.75 0.11 900.51 0.11 22.75 0.02 900.40 0.02 5.00 0.01 900.37 0.01 14.00 0.09 900.49 0.09 23.00 0.02 900.40 0.02 5.25 0.01 900.37 0.01 14.25 0.08 900.48 0.08 23.25 0.02 900.40 0.02 5.50 0.01 900.37 0.01 14.50 0.07 900.47 0.07 23.50 0.02 900.40 0.02 5.75 0.01 900.37 0.01 14.75 0.06 900.46 0.06 23.75 0.02 900.40 0.02 6.00 0.01 900.38 0.01 15.00 0.06 900.46 0.06 24.00 0.02 900.40 0.02 6.25 0.01 900.38 0.01 15.25 0.05 900.45 0.05 6.50 0.01 900.38 0.01 15.50 0.05 900.45 0.05 6.75 0.01 900.38 0.01 15.75 0.05 900.44 0.05 7.00 0.01 900.38 0.01 16.00 0.05 900.44 0.05 7.25 0.01 900.38 0.01 16.25 0.04 900.44 0.04 7.50 0.01 900.39 0.01 16.50 0.04 900.44 0.04 7.75 0.01 900.39 0.01 16.75 0.04 900.43 0.04 8.00 0.01 900.39 0.01 17.00 0.04 900.43 0.04 8.25 0.02 900.39 0.02 17.25 0.04 900.43 0.04 8.50 0.02 900.40 0.02 17.50 0.03 900.43 0.03 8.75 0.02 900.40 0.02 17.75 0.03 900.42 0.03

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 165 Summary for Pond RCVR 3: RCVR 3 Inflow Area = 0.150 ac, 93.33% Impervious, Inflow Depth > 3.50" for 25-yr event Inflow = 0.70 cfs @ 12.05 hrs, Volume= 0.044 af Outflow = 0.70 cfs @ 12.05 hrs, Volume= 0.044 af, Atten= 0%, Lag= 0.0 min Primary = 0.70 cfs @ 12.05 hrs, Volume= 0.044 af Routed to Pond RCVR 2 : RCVR 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.28' @ 12.08 hrs Device Routing Invert Outlet Devices #1 Primary 900.48' 8.0" Round RCVR 3 to RCVR 2 L= 39.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.48' / 900.32' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.57 cfs @ 12.05 hrs HW=901.27' TW=901.12' (Dynamic Tailwater) 1=RCVR 3 to RCVR 2 (Outlet Controls 0.57 cfs @ 1.74 fps) Pond RCVR 3: RCVR 3 RCVR 3 to RCVR 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 166 Pond RCVR 3: RCVR 3 Hydrograph Inflow 0.70 cfs Primary 0.75 0.70 cfs 0.7 Inflow Area=0.150 ac 0.65 Peak Elev=901.28' 0.6 0.55 8.0" 0.5 0.45 Round Culvert Flow (cfs) 0.4 n=0.013 0.35 0.3 L=39.0' 0.25 S=0.0041 '/' 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 167 Pond RCVR 3: RCVR 3 Stage-Discharge Primary 901.25 901.2 901.15 901.1 901.05 901 Elevation (feet) 900.95 900.9 900.85 900.8 900.75 900.7 900.65 900.6 900.55 900.5 RCVR 3 to RCVR 2 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 168 Pond RCVR 3: RCVR 3 Stage-Area-Storage Storage 901.25 901.2 901.15 901.1 901.05 901 Elevation (feet) 900.95 900.9 900.85 900.8 900.75 900.7 900.65 900.6 900.55 900.5 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 169 Hydrograph for Pond RCVR 3: RCVR 3 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.48 0.00 9.00 0.01 900.56 0.01 18.00 0.01 900.55 0.01 0.25 0.00 900.48 0.00 9.25 0.01 900.56 0.01 18.25 0.01 900.55 0.01 0.50 0.00 900.48 0.00 9.50 0.02 900.57 0.02 18.50 0.01 900.55 0.01 0.75 0.00 900.48 0.00 9.75 0.02 900.57 0.02 18.75 0.01 900.55 0.01 1.00 0.00 900.48 0.00 10.00 0.02 900.58 0.02 19.00 0.01 900.55 0.01 1.25 0.00 900.48 0.00 10.25 0.02 900.58 0.02 19.25 0.01 900.55 0.01 1.50 0.00 900.48 0.00 10.50 0.02 900.59 0.02 19.50 0.01 900.55 0.01 1.75 0.00 900.49 0.00 10.75 0.03 900.60 0.03 19.75 0.01 900.55 0.01 2.00 0.00 900.50 0.00 11.00 0.03 900.61 0.03 20.00 0.01 900.55 0.01 2.25 0.00 900.50 0.00 11.25 0.04 900.62 0.04 20.25 0.01 900.54 0.01 2.50 0.00 900.51 0.00 11.50 0.05 900.65 0.05 20.50 0.01 900.54 0.01 2.75 0.00 900.51 0.00 11.75 0.17 900.79 0.17 20.75 0.01 900.54 0.01 3.00 0.00 900.51 0.00 12.00 0.55 901.12 0.55 21.00 0.01 900.54 0.01 3.25 0.00 900.51 0.00 12.25 0.27 901.06 0.27 21.25 0.01 900.54 0.01 3.50 0.00 900.52 0.00 12.50 0.16 900.93 0.16 21.50 0.01 900.54 0.01 3.75 0.00 900.52 0.00 12.75 0.05 900.76 0.05 21.75 0.01 900.54 0.01 4.00 0.00 900.52 0.00 13.00 0.04 900.68 0.04 22.00 0.01 900.54 0.01 4.25 0.00 900.52 0.00 13.25 0.03 900.64 0.03 22.25 0.01 900.54 0.01 4.50 0.00 900.53 0.00 13.50 0.03 900.62 0.03 22.50 0.01 900.54 0.01 4.75 0.00 900.53 0.00 13.75 0.03 900.61 0.03 22.75 0.01 900.54 0.01 5.00 0.00 900.53 0.00 14.00 0.02 900.60 0.02 23.00 0.01 900.54 0.01 5.25 0.00 900.53 0.00 14.25 0.02 900.59 0.02 23.25 0.01 900.54 0.01 5.50 0.01 900.53 0.01 14.50 0.02 900.59 0.02 23.50 0.01 900.54 0.01 5.75 0.01 900.53 0.01 14.75 0.02 900.58 0.02 23.75 0.01 900.54 0.01 6.00 0.01 900.54 0.01 15.00 0.02 900.58 0.02 24.00 0.01 900.54 0.01 6.25 0.01 900.54 0.01 15.25 0.02 900.57 0.02 6.50 0.01 900.54 0.01 15.50 0.01 900.57 0.01 6.75 0.01 900.54 0.01 15.75 0.01 900.57 0.01 7.00 0.01 900.54 0.01 16.00 0.01 900.57 0.01 7.25 0.01 900.55 0.01 16.25 0.01 900.56 0.01 7.50 0.01 900.55 0.01 16.50 0.01 900.56 0.01 7.75 0.01 900.55 0.01 16.75 0.01 900.56 0.01 8.00 0.01 900.55 0.01 17.00 0.01 900.56 0.01 8.25 0.01 900.55 0.01 17.25 0.01 900.56 0.01 8.50 0.01 900.56 0.01 17.50 0.01 900.56 0.01 8.75 0.01 900.56 0.01 17.75 0.01 900.55 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 170 Summary for Pond RCVR 4: RCVR 4 Inflow Area = 0.080 ac, 87.50% Impervious, Inflow Depth > 3.39" for 25-yr event Inflow = 0.38 cfs @ 12.04 hrs, Volume= 0.023 af Outflow = 0.38 cfs @ 12.04 hrs, Volume= 0.023 af, Atten= 0%, Lag= 0.0 min Primary = 0.38 cfs @ 12.04 hrs, Volume= 0.023 af Routed to Pond RCVR 5 : RCVR 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.72' @ 12.05 hrs Device Routing Invert Outlet Devices #1 Primary 901.13' 8.0" Round RCVR 4 to RCVR 5 L= 22.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 901.13' / 901.04' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.42 cfs @ 12.04 hrs HW=901.71' TW=901.59' (Dynamic Tailwater) 1=RCVR 4 to RCVR 5 (Outlet Controls 0.42 cfs @ 1.77 fps) Pond RCVR 4: RCVR 4 RCVR 4 to RCVR 5

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 171 Pond RCVR 4: RCVR 4 Hydrograph Inflow 0.42 0.38 cfs Primary 0.4 0.38 cfs 0.38 Inflow Area=0.080 ac 0.36 0.34 Peak Elev=901.72' 0.32 0.3 8.0" 0.28 0.26 Round Culvert Flow (cfs) 0.24 0.22 n=0.013 0.2 0.18 L=22.0' 0.16 0.14 0.12 S=0.0041 '/' 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 172 Pond RCVR 4: RCVR 4 Stage-Discharge Primary 901.75 901.7 901.65 901.6 901.55 Elevation (feet) 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 RCVR 4 to RCVR 5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 173 Pond RCVR 4: RCVR 4 Stage-Area-Storage Storage 901.75 901.7 901.65 901.6 901.55 Elevation (feet) 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 174 Hydrograph for Pond RCVR 4: RCVR 4 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 901.13 0.00 9.00 0.01 901.19 0.01 18.00 0.00 901.18 0.00 0.25 0.00 901.13 0.00 9.25 0.01 901.19 0.01 18.25 0.00 901.18 0.00 0.50 0.00 901.13 0.00 9.50 0.01 901.20 0.01 18.50 0.00 901.18 0.00 0.75 0.00 901.13 0.00 9.75 0.01 901.20 0.01 18.75 0.00 901.18 0.00 1.00 0.00 901.13 0.00 10.00 0.01 901.20 0.01 19.00 0.00 901.18 0.00 1.25 0.00 901.13 0.00 10.25 0.01 901.21 0.01 19.25 0.00 901.18 0.00 1.50 0.00 901.13 0.00 10.50 0.01 901.21 0.01 19.50 0.00 901.18 0.00 1.75 0.00 901.13 0.00 10.75 0.01 901.22 0.01 19.75 0.00 901.18 0.00 2.00 0.00 901.13 0.00 11.00 0.02 901.23 0.02 20.00 0.00 901.18 0.00 2.25 0.00 901.13 0.00 11.25 0.02 901.24 0.02 20.25 0.00 901.18 0.00 2.50 0.00 901.14 0.00 11.50 0.03 901.26 0.03 20.50 0.00 901.18 0.00 2.75 0.00 901.15 0.00 11.75 0.09 901.37 0.09 20.75 0.00 901.18 0.00 3.00 0.00 901.15 0.00 12.00 0.33 901.63 0.33 21.00 0.00 901.18 0.00 3.25 0.00 901.15 0.00 12.25 0.14 901.54 0.14 21.25 0.00 901.18 0.00 3.50 0.00 901.15 0.00 12.50 0.08 901.47 0.08 21.50 0.00 901.18 0.00 3.75 0.00 901.16 0.00 12.75 0.03 901.31 0.03 21.75 0.00 901.17 0.00 4.00 0.00 901.16 0.00 13.00 0.02 901.26 0.02 22.00 0.00 901.17 0.00 4.25 0.00 901.16 0.00 13.25 0.02 901.24 0.02 22.25 0.00 901.17 0.00 4.50 0.00 901.16 0.00 13.50 0.01 901.23 0.01 22.50 0.00 901.17 0.00 4.75 0.00 901.16 0.00 13.75 0.01 901.22 0.01 22.75 0.00 901.17 0.00 5.00 0.00 901.16 0.00 14.00 0.01 901.22 0.01 23.00 0.00 901.17 0.00 5.25 0.00 901.16 0.00 14.25 0.01 901.21 0.01 23.25 0.00 901.17 0.00 5.50 0.00 901.17 0.00 14.50 0.01 901.21 0.01 23.50 0.00 901.17 0.00 5.75 0.00 901.17 0.00 14.75 0.01 901.20 0.01 23.75 0.00 901.17 0.00 6.00 0.00 901.17 0.00 15.00 0.01 901.20 0.01 24.00 0.00 901.17 0.00 6.25 0.00 901.17 0.00 15.25 0.01 901.20 0.01 6.50 0.00 901.17 0.00 15.50 0.01 901.20 0.01 6.75 0.00 901.17 0.00 15.75 0.01 901.20 0.01 7.00 0.00 901.18 0.00 16.00 0.01 901.19 0.01 7.25 0.00 901.18 0.00 16.25 0.01 901.19 0.01 7.50 0.00 901.18 0.00 16.50 0.01 901.19 0.01 7.75 0.00 901.18 0.00 16.75 0.01 901.19 0.01 8.00 0.00 901.18 0.00 17.00 0.01 901.19 0.01 8.25 0.00 901.18 0.00 17.25 0.01 901.19 0.01 8.50 0.01 901.19 0.01 17.50 0.01 901.19 0.01 8.75 0.01 901.19 0.01 17.75 0.01 901.18 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 175 Summary for Pond RCVR 5: RCVR 5 Inflow Area = 0.130 ac, 92.31% Impervious, Inflow Depth > 3.48" for 25-yr event Inflow = 0.60 cfs @ 12.01 hrs, Volume= 0.038 af Outflow = 0.60 cfs @ 12.01 hrs, Volume= 0.038 af, Atten= 0%, Lag= 0.0 min Primary = 0.60 cfs @ 12.01 hrs, Volume= 0.038 af Routed to Pond SWALE : SWALE Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.63' @ 12.01 hrs Device Routing Invert Outlet Devices #1 Primary 901.04' 8.0" Round RCVR 5 to SWALE L= 89.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 901.04' / 900.68' S= 0.0040 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.59 cfs @ 12.01 hrs HW=901.62' TW=901.12' (Dynamic Tailwater) 1=RCVR 5 to SWALE (Outlet Controls 0.59 cfs @ 2.43 fps) Pond RCVR 5: RCVR 5 RCVR 5 to SWALE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 176 Pond RCVR 5: RCVR 5 Hydrograph Inflow 0.60 cfs Primary 0.65 0.60 cfs 0.6 Inflow Area=0.130 ac 0.55 Peak Elev=901.63' 0.5 8.0" 0.45 0.4 Round Culvert Flow (cfs) 0.35 n=0.013 0.3 L=89.0' 0.25 0.2 S=0.0040 '/' 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 177 Pond RCVR 5: RCVR 5 Stage-Discharge 901.7 Primary 901.65 901.6 901.55 901.5 901.45 Elevation (feet) 901.4 901.35 901.3 901.25 901.2 901.15 901.1 RCVR 5 to SWALE 901.05 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 178 Pond RCVR 5: RCVR 5 Stage-Area-Storage 901.7 Storage 901.65 901.6 901.55 901.5 901.45 Elevation (feet) 901.4 901.35 901.3 901.25 901.2 901.15 901.1 901.05 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 179 Hydrograph for Pond RCVR 5: RCVR 5 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 901.04 0.00 9.00 0.01 901.11 0.01 18.00 0.01 901.11 0.01 0.25 0.00 901.04 0.00 9.25 0.01 901.12 0.01 18.25 0.01 901.11 0.01 0.50 0.00 901.04 0.00 9.50 0.01 901.12 0.01 18.50 0.01 901.10 0.01 0.75 0.00 901.04 0.00 9.75 0.01 901.12 0.01 18.75 0.01 901.10 0.01 1.00 0.00 901.04 0.00 10.00 0.02 901.13 0.02 19.00 0.01 901.10 0.01 1.25 0.00 901.05 0.00 10.25 0.02 901.13 0.02 19.25 0.01 901.10 0.01 1.50 0.00 901.05 0.00 10.50 0.02 901.14 0.02 19.50 0.01 901.10 0.01 1.75 0.00 901.06 0.00 10.75 0.02 901.15 0.02 19.75 0.01 901.10 0.01 2.00 0.00 901.06 0.00 11.00 0.03 901.16 0.03 20.00 0.01 901.10 0.01 2.25 0.00 901.06 0.00 11.25 0.04 901.17 0.04 20.25 0.01 901.10 0.01 2.50 0.00 901.06 0.00 11.50 0.05 901.19 0.05 20.50 0.01 901.10 0.01 2.75 0.00 901.07 0.00 11.75 0.16 901.31 0.16 20.75 0.01 901.10 0.01 3.00 0.00 901.07 0.00 12.00 0.60 901.63 0.60 21.00 0.01 901.10 0.01 3.25 0.00 901.07 0.00 12.25 0.20 901.49 0.20 21.25 0.01 901.10 0.01 3.50 0.00 901.07 0.00 12.50 0.13 901.43 0.13 21.50 0.01 901.10 0.01 3.75 0.00 901.08 0.00 12.75 0.04 901.27 0.04 21.75 0.01 901.10 0.01 4.00 0.00 901.08 0.00 13.00 0.03 901.20 0.03 22.00 0.01 901.09 0.01 4.25 0.00 901.08 0.00 13.25 0.03 901.18 0.03 22.25 0.01 901.09 0.01 4.50 0.00 901.08 0.00 13.50 0.02 901.16 0.02 22.50 0.01 901.09 0.01 4.75 0.00 901.08 0.00 13.75 0.02 901.15 0.02 22.75 0.01 901.09 0.01 5.00 0.00 901.08 0.00 14.00 0.02 901.14 0.02 23.00 0.01 901.09 0.01 5.25 0.00 901.09 0.00 14.25 0.02 901.14 0.02 23.25 0.00 901.09 0.00 5.50 0.00 901.09 0.00 14.50 0.02 901.13 0.02 23.50 0.00 901.09 0.00 5.75 0.00 901.09 0.00 14.75 0.01 901.13 0.01 23.75 0.00 901.09 0.00 6.00 0.01 901.09 0.01 15.00 0.01 901.13 0.01 24.00 0.00 901.09 0.00 6.25 0.01 901.09 0.01 15.25 0.01 901.12 0.01 6.50 0.01 901.09 0.01 15.50 0.01 901.12 0.01 6.75 0.01 901.10 0.01 15.75 0.01 901.12 0.01 7.00 0.01 901.10 0.01 16.00 0.01 901.12 0.01 7.25 0.01 901.10 0.01 16.25 0.01 901.12 0.01 7.50 0.01 901.10 0.01 16.50 0.01 901.11 0.01 7.75 0.01 901.10 0.01 16.75 0.01 901.11 0.01 8.00 0.01 901.11 0.01 17.00 0.01 901.11 0.01 8.25 0.01 901.11 0.01 17.25 0.01 901.11 0.01 8.50 0.01 901.11 0.01 17.50 0.01 901.11 0.01 8.75 0.01 901.11 0.01 17.75 0.01 901.11 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 180 Summary for Pond SWALE: SWALE Inflow Area = 0.280 ac, 64.29% Impervious, Inflow Depth > 2.95" for 25-yr event Inflow = 0.79 cfs @ 12.03 hrs, Volume= 0.069 af Outflow = 0.51 cfs @ 12.35 hrs, Volume= 0.058 af, Atten= 35%, Lag= 18.6 min Primary = 0.51 cfs @ 12.35 hrs, Volume= 0.058 af Routed to Pond RCVR 1 : RCVR 1 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.39' @ 12.28 hrs Surf.Area= 1,307 sf Storage= 1,170 cf Plug-Flow detention time= 128.3 min calculated for 0.058 af (84% of inflow) Center-of-Mass det. time= 62.0 min ( 845.6 - 783.6 ) Volume Invert Avail.Storage Storage Description #1 900.00' 2,104 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 900.00 396 0 0 901.00 1,038 717 717 902.00 1,736 1,387 2,104 Device Routing Invert Outlet Devices #1 Primary 900.68' 8.0" Round 8" HDPE L= 32.0' CPP, mitered to conform to fill, Ke= 0.700 Inlet / Outlet Invert= 900.68' / 900.55' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.54 cfs @ 12.35 hrs HW=901.38' TW=901.22' (Dynamic Tailwater) 1=8" HDPE (Outlet Controls 0.54 cfs @ 1.84 fps)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 181 Pond SWALE: SWALE 8" HDPE Pond SWALE: SWALE Hydrograph Inflow 0.79 cfs Primary 0.85 0.8 Inflow Area=0.280 ac 0.75 0.7 Peak Elev=901.39' 0.65 Storage=1,170 cf 0.6 0.51 cfs 0.55 8.0" Flow (cfs) 0.5 0.45 Round Culvert 0.4 n=0.013 0.35 0.3 L=32.0' 0.25 0.2 S=0.0041 '/' 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 182 Pond SWALE: SWALE Stage-Discharge 902 Primary Elevation (feet) 901 8" HDPE Initial Tailwater 900 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 183 Pond SWALE: SWALE Stage-Area-Storage Surface/Horizontal/Wetted Area (sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 Surface Storage 902 Elevation (feet) 901 Custom Stage Data 900 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 Storage (cubic-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 184 Hydrograph for Pond SWALE: SWALE Time Inflow Storage Elevation Primary Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 900.00 0.00 18.00 0.02 506 900.78 0.02 0.50 0.00 0 900.00 0.00 18.50 0.02 503 900.78 0.02 1.00 0.00 0 900.00 0.00 19.00 0.01 500 900.78 0.02 1.50 0.00 0 900.00 0.00 19.50 0.01 498 900.77 0.02 2.00 0.00 1 900.00 0.00 20.00 0.01 495 900.77 0.01 2.50 0.00 2 900.01 0.00 20.50 0.01 493 900.77 0.01 3.00 0.00 5 900.01 0.00 21.00 0.01 491 900.77 0.01 3.50 0.00 8 900.02 0.00 21.50 0.01 490 900.76 0.01 4.00 0.00 12 900.03 0.00 22.00 0.01 488 900.76 0.01 4.50 0.00 18 900.04 0.00 22.50 0.01 487 900.76 0.01 5.00 0.00 24 900.06 0.00 23.00 0.01 485 900.76 0.01 5.50 0.00 31 900.07 0.00 23.50 0.01 484 900.76 0.01 6.00 0.01 40 900.09 0.00 24.00 0.01 483 900.76 0.01 6.50 0.01 49 900.11 0.00 7.00 0.01 61 900.14 0.00 7.50 0.01 74 900.17 0.00 8.00 0.01 90 900.20 0.00 8.50 0.01 110 900.23 0.00 9.00 0.01 133 900.28 0.00 9.50 0.02 162 900.32 0.00 10.00 0.02 198 900.38 0.00 10.50 0.03 244 900.45 0.00 11.00 0.04 307 900.54 0.00 11.50 0.07 406 900.67 0.00 12.00 0.79 832 901.11 0.12 12.50 0.31 1,084 901.32 0.46 13.00 0.08 761 901.04 0.20 13.50 0.05 631 900.91 0.09 14.00 0.04 582 900.86 0.06 14.50 0.03 557 900.84 0.04 15.00 0.03 542 900.82 0.04 15.50 0.03 532 900.81 0.03 16.00 0.02 525 900.80 0.03 16.50 0.02 519 900.80 0.02 17.00 0.02 514 900.79 0.02 17.50 0.02 509 900.79 0.02

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 185 Summary for Link POST: Post Development Inflow Area = 0.690 ac, 56.52% Impervious, Inflow Depth > 2.66" for 25-yr event Inflow = 1.24 cfs @ 12.07 hrs, Volume= 0.153 af Primary = 1.24 cfs @ 12.07 hrs, Volume= 0.153 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link POST: Post Development Hydrograph Inflow 1.24 cfs Primary 1.24 cfs Inflow Area=0.690 ac 1 Flow (cfs) 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 25-yr Rainfall=3.85" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 186 Hydrograph for Link POST: Post Development Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 9.00 0.02 0.00 0.02 18.00 0.04 0.00 0.04 0.25 0.00 0.00 0.00 9.25 0.02 0.00 0.02 18.25 0.04 0.00 0.04 0.50 0.00 0.00 0.00 9.50 0.02 0.00 0.02 18.50 0.04 0.00 0.04 0.75 0.00 0.00 0.00 9.75 0.03 0.00 0.03 18.75 0.04 0.00 0.04 1.00 0.00 0.00 0.00 10.00 0.03 0.00 0.03 19.00 0.04 0.00 0.04 1.25 0.00 0.00 0.00 10.25 0.03 0.00 0.03 19.25 0.04 0.00 0.04 1.50 0.00 0.00 0.00 10.50 0.04 0.00 0.04 19.50 0.04 0.00 0.04 1.75 0.00 0.00 0.00 10.75 0.05 0.00 0.05 19.75 0.03 0.00 0.03 2.00 0.00 0.00 0.00 11.00 0.05 0.00 0.05 20.00 0.03 0.00 0.03 2.25 0.00 0.00 0.00 11.25 0.07 0.00 0.07 20.25 0.03 0.00 0.03 2.50 0.00 0.00 0.00 11.50 0.10 0.00 0.10 20.50 0.03 0.00 0.03 2.75 0.00 0.00 0.00 11.75 0.31 0.00 0.31 20.75 0.03 0.00 0.03 3.00 0.00 0.00 0.00 12.00 1.12 0.00 1.12 21.00 0.03 0.00 0.03 3.25 0.00 0.00 0.00 12.25 1.12 0.00 1.12 21.25 0.03 0.00 0.03 3.50 0.00 0.00 0.00 12.50 0.95 0.00 0.95 21.50 0.03 0.00 0.03 3.75 0.00 0.00 0.00 12.75 0.57 0.00 0.57 21.75 0.03 0.00 0.03 4.00 0.01 0.00 0.01 13.00 0.35 0.00 0.35 22.00 0.03 0.00 0.03 4.25 0.01 0.00 0.01 13.25 0.23 0.00 0.23 22.25 0.03 0.00 0.03 4.50 0.01 0.00 0.01 13.50 0.17 0.00 0.17 22.50 0.03 0.00 0.03 4.75 0.01 0.00 0.01 13.75 0.14 0.00 0.14 22.75 0.03 0.00 0.03 5.00 0.01 0.00 0.01 14.00 0.12 0.00 0.12 23.00 0.03 0.00 0.03 5.25 0.01 0.00 0.01 14.25 0.10 0.00 0.10 23.25 0.03 0.00 0.03 5.50 0.01 0.00 0.01 14.50 0.09 0.00 0.09 23.50 0.02 0.00 0.02 5.75 0.01 0.00 0.01 14.75 0.08 0.00 0.08 23.75 0.02 0.00 0.02 6.00 0.01 0.00 0.01 15.00 0.08 0.00 0.08 24.00 0.02 0.00 0.02 6.25 0.01 0.00 0.01 15.25 0.07 0.00 0.07 6.50 0.01 0.00 0.01 15.50 0.07 0.00 0.07 6.75 0.01 0.00 0.01 15.75 0.06 0.00 0.06 7.00 0.01 0.00 0.01 16.00 0.06 0.00 0.06 7.25 0.01 0.00 0.01 16.25 0.06 0.00 0.06 7.50 0.01 0.00 0.01 16.50 0.05 0.00 0.05 7.75 0.01 0.00 0.01 16.75 0.05 0.00 0.05 8.00 0.01 0.00 0.01 17.00 0.05 0.00 0.05 8.25 0.02 0.00 0.02 17.25 0.05 0.00 0.05 8.50 0.02 0.00 0.02 17.50 0.05 0.00 0.05 8.75 0.02 0.00 0.02 17.75 0.04 0.00 0.04

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 187 Time span=0.00-24.00 hrs, dt=0.05 hrs, 481 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment ATO: Area to Offsite Runoff Area=0.190 ac 0.00% Impervious Runoff Depth>3.09" Flow Length=60' Slope=0.0050 '/' Tc=30.0 min CN=80 Runoff=0.47 cfs 0.049 af Subcatchment DA 1: Drainage Area 1 Runoff Area=0.060 ac 100.00% Impervious Runoff Depth>5.01" Flow Length=80' Slope=0.0100 '/' Tc=1.6 min CN=98 Runoff=0.48 cfs 0.025 af Subcatchment DA 2: Drainage Area 2 Runoff Area=0.010 ac 100.00% Impervious Runoff Depth>5.01" Flow Length=35' Slope=0.0100 '/' Tc=0.8 min CN=98 Runoff=0.08 cfs 0.004 af Subcatchment DA 3: Drainage Area 3 Runoff Area=0.150 ac 93.33% Impervious Runoff Depth>4.89" Flow Length=75' Slope=0.0100 '/' Tc=7.2 min CN=97 Runoff=0.97 cfs 0.061 af Subcatchment DA 4: Drainage Area 4 Runoff Area=0.080 ac 87.50% Impervious Runoff Depth>4.78" Flow Length=20' Slope=0.0100 '/' Tc=6.3 min CN=96 Runoff=0.53 cfs 0.032 af Subcatchment DA 5: Drainage Area 5 Runoff Area=0.050 ac 100.00% Impervious Runoff Depth>5.01" Flow Length=60' Slope=0.0050 '/' Tc=1.7 min CN=98 Runoff=0.40 cfs 0.021 af Subcatchment DA 6: Drainage Area 6 Runoff Area=0.150 ac 40.00% Impervious Runoff Depth>3.79" Flow Length=40' Slope=0.0045 '/' Tc=15.0 min CN=87 Runoff=0.63 cfs 0.047 af Pond EX RCVR: EX RCVR Peak Elev=900.50' Inflow=1.64 cfs 0.179 af 12.0" Round Culvert n=0.013 L=121.0' S=0.0031 '/' Outflow=1.64 cfs 0.179 af Pond RCVR 1: RCVR 1 Peak Elev=902.22' Inflow=1.35 cfs 0.114 af 8.0" Round Culvert n=0.013 L=59.0' S=0.0041 '/' Outflow=1.35 cfs 0.114 af Pond RCVR 2: RCVR 2 Peak Elev=902.12' Inflow=1.64 cfs 0.179 af 8.0" Round Culvert n=0.013 L=72.0' S=0.0100 '/' Outflow=1.64 cfs 0.179 af Pond RCVR 3: RCVR 3 Peak Elev=902.30' Inflow=0.97 cfs 0.061 af 8.0" Round Culvert n=0.013 L=39.0' S=0.0041 '/' Outflow=0.97 cfs 0.061 af

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 188 Pond RCVR 4: RCVR 4 Peak Elev=901.97' Inflow=0.53 cfs 0.032 af 8.0" Round Culvert n=0.013 L=22.0' S=0.0041 '/' Outflow=0.53 cfs 0.032 af Pond RCVR 5: RCVR 5 Peak Elev=901.96' Inflow=0.84 cfs 0.053 af 8.0" Round Culvert n=0.013 L=89.0' S=0.0040 '/' Outflow=0.84 cfs 0.053 af Pond SWALE: SWALE Peak Elev=901.93' Storage=1,986 cf Inflow=1.15 cfs 0.100 af 8.0" Round Culvert n=0.013 L=32.0' S=0.0041 '/' Outflow=1.27 cfs 0.089 af Link POST: Post Development Inflow=2.11 cfs 0.228 af Primary=2.11 cfs 0.228 af Total Runoff Area = 0.690 ac Runoff Volume = 0.240 af Average Runoff Depth = 4.17" 43.48% Pervious = 0.300 ac 56.52% Impervious = 0.390 ac

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 189 Summary for Subcatchment ATO: Area to Offsite Runoff = 0.47 cfs @ 12.38 hrs, Volume= 0.049 af, Depth> 3.09" Routed to Link POST : Post Development Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.190 80 >75% Grass cover, Good, HSG D 0.190 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 30.0 60 0.0050 0.03 Sheet Flow, Woods: Light underbrush n= 0.400 P2= 2.20" Subcatchment ATO: Area to Offsite

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 190 Subcatchment ATO: Area to Offsite Hydrograph Runoff 0.5 0.47 cfs extreme_precip_tables_output (29) 24-hr S1 100-yr 0.45 Rainfall=5.25" Runoff Area=0.190 ac Runoff Volume=0.049 af 0.4 Runoff Depth>3.09" Flow Length=60' 0.35 Slope=0.0050 '/' Tc=30.0 min 0.3 CN=80 Flow (cfs) 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 191 Hydrograph for Subcatchment ATO: Area to Offsite Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.01 0.00 18.00 4.89 2.80 0.01 0.25 0.01 0.00 0.00 9.25 0.71 0.02 0.00 18.25 4.91 2.82 0.01 0.50 0.02 0.00 0.00 9.50 0.74 0.02 0.00 18.50 4.93 2.83 0.01 0.75 0.04 0.00 0.00 9.75 0.79 0.03 0.00 18.75 4.95 2.85 0.01 1.00 0.05 0.00 0.00 10.00 0.83 0.04 0.01 19.00 4.97 2.86 0.01 1.25 0.06 0.00 0.00 10.25 0.88 0.05 0.01 19.25 4.99 2.88 0.01 1.50 0.07 0.00 0.00 10.50 0.94 0.07 0.01 19.50 5.00 2.89 0.01 1.75 0.09 0.00 0.00 10.75 1.00 0.08 0.01 19.75 5.02 2.91 0.01 2.00 0.10 0.00 0.00 11.00 1.08 0.11 0.01 20.00 5.03 2.92 0.01 2.25 0.11 0.00 0.00 11.25 1.17 0.14 0.02 20.25 5.05 2.94 0.01 2.50 0.13 0.00 0.00 11.50 1.30 0.19 0.02 20.50 5.07 2.95 0.01 2.75 0.14 0.00 0.00 11.75 1.73 0.40 0.05 20.75 5.08 2.96 0.01 3.00 0.16 0.00 0.00 12.00 2.90 1.17 0.14 21.00 5.10 2.98 0.01 3.25 0.17 0.00 0.00 12.25 3.58 1.70 0.41 21.25 5.11 2.99 0.01 3.50 0.19 0.00 0.00 12.50 3.98 2.02 0.43 21.50 5.12 3.00 0.01 3.75 0.20 0.00 0.00 12.75 4.09 2.12 0.29 21.75 5.14 3.01 0.01 4.00 0.22 0.00 0.00 13.00 4.18 2.19 0.15 22.00 5.15 3.02 0.01 4.25 0.23 0.00 0.00 13.25 4.26 2.26 0.08 22.25 5.16 3.04 0.01 4.50 0.25 0.00 0.00 13.50 4.32 2.31 0.06 22.50 5.18 3.05 0.01 4.75 0.27 0.00 0.00 13.75 4.38 2.36 0.05 22.75 5.19 3.06 0.01 5.00 0.28 0.00 0.00 14.00 4.43 2.40 0.04 23.00 5.20 3.07 0.01 5.25 0.30 0.00 0.00 14.25 4.47 2.44 0.03 23.25 5.21 3.08 0.01 5.50 0.32 0.00 0.00 14.50 4.51 2.47 0.03 23.50 5.23 3.09 0.01 5.75 0.34 0.00 0.00 14.75 4.55 2.50 0.03 23.75 5.24 3.10 0.01 6.00 0.36 0.00 0.00 15.00 4.58 2.53 0.03 24.00 5.25 3.11 0.01 6.25 0.38 0.00 0.00 15.25 4.62 2.56 0.02 6.50 0.40 0.00 0.00 15.50 4.65 2.59 0.02 6.75 0.42 0.00 0.00 15.75 4.68 2.61 0.02 7.00 0.45 0.00 0.00 16.00 4.71 2.64 0.02 7.25 0.47 0.00 0.00 16.25 4.73 2.66 0.02 7.50 0.49 0.00 0.00 16.50 4.76 2.68 0.02 7.75 0.52 0.00 0.00 16.75 4.78 2.71 0.02 8.00 0.55 0.00 0.00 17.00 4.81 2.73 0.02 8.25 0.57 0.00 0.00 17.25 4.83 2.74 0.02 8.50 0.60 0.00 0.00 17.50 4.85 2.76 0.02 8.75 0.64 0.01 0.00 17.75 4.87 2.78 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 192 Summary for Subcatchment DA 1: Drainage Area 1 Runoff = 0.48 cfs @ 11.98 hrs, Volume= 0.025 af, Depth> 5.01" Routed to Pond RCVR 1 : RCVR 1 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.060 98 Paved parking, HSG D 0.060 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.6 80 0.0100 0.83 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 1: Drainage Area 1

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 193 Subcatchment DA 1: Drainage Area 1 Hydrograph Runoff 0.5 0.48 cfs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" 0.45 Runoff Area=0.060 ac Runoff Volume=0.025 af 0.4 Runoff Depth>5.01" Flow Length=80' 0.35 Slope=0.0100 '/' Tc=1.6 min CN=98 Flow (cfs) 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 194 Hydrograph for Subcatchment DA 1: Drainage Area 1 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.47 0.01 18.00 4.89 4.66 0.00 0.25 0.01 0.00 0.00 9.25 0.71 0.51 0.01 18.25 4.91 4.68 0.00 0.50 0.02 0.00 0.00 9.50 0.74 0.55 0.01 18.50 4.93 4.69 0.00 0.75 0.04 0.00 0.00 9.75 0.79 0.59 0.01 18.75 4.95 4.71 0.00 1.00 0.05 0.00 0.00 10.00 0.83 0.63 0.01 19.00 4.97 4.73 0.00 1.25 0.06 0.00 0.00 10.25 0.88 0.68 0.01 19.25 4.99 4.75 0.00 1.50 0.07 0.00 0.00 10.50 0.94 0.73 0.01 19.50 5.00 4.77 0.00 1.75 0.09 0.01 0.00 10.75 1.00 0.80 0.02 19.75 5.02 4.78 0.00 2.00 0.10 0.01 0.00 11.00 1.08 0.87 0.02 20.00 5.03 4.80 0.00 2.25 0.11 0.02 0.00 11.25 1.17 0.96 0.02 20.25 5.05 4.81 0.00 2.50 0.13 0.03 0.00 11.50 1.30 1.08 0.04 20.50 5.07 4.83 0.00 2.75 0.14 0.03 0.00 11.75 1.73 1.51 0.12 20.75 5.08 4.84 0.00 3.00 0.16 0.04 0.00 12.00 2.90 2.67 0.45 21.00 5.10 4.86 0.00 3.25 0.17 0.05 0.00 12.25 3.58 3.34 0.12 21.25 5.11 4.87 0.00 3.50 0.19 0.06 0.00 12.50 3.98 3.74 0.08 21.50 5.12 4.89 0.00 3.75 0.20 0.07 0.00 12.75 4.09 3.86 0.02 21.75 5.14 4.90 0.00 4.00 0.22 0.08 0.00 13.00 4.18 3.95 0.02 22.00 5.15 4.91 0.00 4.25 0.23 0.09 0.00 13.25 4.26 4.02 0.02 22.25 5.16 4.93 0.00 4.50 0.25 0.11 0.00 13.50 4.32 4.08 0.01 22.50 5.18 4.94 0.00 4.75 0.27 0.12 0.00 13.75 4.38 4.14 0.01 22.75 5.19 4.95 0.00 5.00 0.28 0.13 0.00 14.00 4.43 4.19 0.01 23.00 5.20 4.97 0.00 5.25 0.30 0.15 0.00 14.25 4.47 4.23 0.01 23.25 5.21 4.98 0.00 5.50 0.32 0.16 0.00 14.50 4.51 4.28 0.01 23.50 5.23 4.99 0.00 5.75 0.34 0.18 0.00 14.75 4.55 4.31 0.01 23.75 5.24 5.00 0.00 6.00 0.36 0.19 0.00 15.00 4.58 4.35 0.01 24.00 5.25 5.01 0.00 6.25 0.38 0.21 0.00 15.25 4.62 4.38 0.01 6.50 0.40 0.23 0.00 15.50 4.65 4.41 0.01 6.75 0.42 0.25 0.00 15.75 4.68 4.44 0.01 7.00 0.45 0.27 0.00 16.00 4.71 4.47 0.01 7.25 0.47 0.29 0.01 16.25 4.73 4.50 0.01 7.50 0.49 0.31 0.01 16.50 4.76 4.52 0.01 7.75 0.52 0.34 0.01 16.75 4.78 4.55 0.01 8.00 0.55 0.36 0.01 17.00 4.81 4.57 0.01 8.25 0.57 0.39 0.01 17.25 4.83 4.59 0.01 8.50 0.60 0.41 0.01 17.50 4.85 4.61 0.01 8.75 0.64 0.44 0.01 17.75 4.87 4.64 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 195 Summary for Subcatchment DA 2: Drainage Area 2 Runoff = 0.08 cfs @ 11.96 hrs, Volume= 0.004 af, Depth> 5.01" Routed to Pond RCVR 2 : RCVR 2 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.010 98 Paved parking, HSG D 0.010 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.8 35 0.0100 0.70 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 2: Drainage Area 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 196 Subcatchment DA 2: Drainage Area 2 Hydrograph 0.09 Runoff 0.085 0.08 cfs extreme_precip_tables_output (29) 24-hr S1 100-yr 0.08 Rainfall=5.25" 0.075 Runoff Area=0.010 ac Runoff Volume=0.004 af 0.07 Runoff Depth>5.01" 0.065 Flow Length=35' 0.06 Slope=0.0100 '/' Tc=0.8 min 0.055 CN=98 Flow (cfs) 0.05 0.045 0.04 0.035 0.03 0.025 0.02 0.015 0.01 0.005 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 197 Hydrograph for Subcatchment DA 2: Drainage Area 2 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.47 0.00 18.00 4.89 4.66 0.00 0.25 0.01 0.00 0.00 9.25 0.71 0.51 0.00 18.25 4.91 4.68 0.00 0.50 0.02 0.00 0.00 9.50 0.74 0.55 0.00 18.50 4.93 4.69 0.00 0.75 0.04 0.00 0.00 9.75 0.79 0.59 0.00 18.75 4.95 4.71 0.00 1.00 0.05 0.00 0.00 10.00 0.83 0.63 0.00 19.00 4.97 4.73 0.00 1.25 0.06 0.00 0.00 10.25 0.88 0.68 0.00 19.25 4.99 4.75 0.00 1.50 0.07 0.00 0.00 10.50 0.94 0.73 0.00 19.50 5.00 4.77 0.00 1.75 0.09 0.01 0.00 10.75 1.00 0.80 0.00 19.75 5.02 4.78 0.00 2.00 0.10 0.01 0.00 11.00 1.08 0.87 0.00 20.00 5.03 4.80 0.00 2.25 0.11 0.02 0.00 11.25 1.17 0.96 0.00 20.25 5.05 4.81 0.00 2.50 0.13 0.03 0.00 11.50 1.30 1.08 0.01 20.50 5.07 4.83 0.00 2.75 0.14 0.03 0.00 11.75 1.73 1.51 0.02 20.75 5.08 4.84 0.00 3.00 0.16 0.04 0.00 12.00 2.90 2.67 0.07 21.00 5.10 4.86 0.00 3.25 0.17 0.05 0.00 12.25 3.58 3.34 0.02 21.25 5.11 4.87 0.00 3.50 0.19 0.06 0.00 12.50 3.98 3.74 0.01 21.50 5.12 4.89 0.00 3.75 0.20 0.07 0.00 12.75 4.09 3.86 0.00 21.75 5.14 4.90 0.00 4.00 0.22 0.08 0.00 13.00 4.18 3.95 0.00 22.00 5.15 4.91 0.00 4.25 0.23 0.09 0.00 13.25 4.26 4.02 0.00 22.25 5.16 4.93 0.00 4.50 0.25 0.11 0.00 13.50 4.32 4.08 0.00 22.50 5.18 4.94 0.00 4.75 0.27 0.12 0.00 13.75 4.38 4.14 0.00 22.75 5.19 4.95 0.00 5.00 0.28 0.13 0.00 14.00 4.43 4.19 0.00 23.00 5.20 4.97 0.00 5.25 0.30 0.15 0.00 14.25 4.47 4.23 0.00 23.25 5.21 4.98 0.00 5.50 0.32 0.16 0.00 14.50 4.51 4.28 0.00 23.50 5.23 4.99 0.00 5.75 0.34 0.18 0.00 14.75 4.55 4.31 0.00 23.75 5.24 5.00 0.00 6.00 0.36 0.19 0.00 15.00 4.58 4.35 0.00 24.00 5.25 5.01 0.00 6.25 0.38 0.21 0.00 15.25 4.62 4.38 0.00 6.50 0.40 0.23 0.00 15.50 4.65 4.41 0.00 6.75 0.42 0.25 0.00 15.75 4.68 4.44 0.00 7.00 0.45 0.27 0.00 16.00 4.71 4.47 0.00 7.25 0.47 0.29 0.00 16.25 4.73 4.50 0.00 7.50 0.49 0.31 0.00 16.50 4.76 4.52 0.00 7.75 0.52 0.34 0.00 16.75 4.78 4.55 0.00 8.00 0.55 0.36 0.00 17.00 4.81 4.57 0.00 8.25 0.57 0.39 0.00 17.25 4.83 4.59 0.00 8.50 0.60 0.41 0.00 17.50 4.85 4.61 0.00 8.75 0.64 0.44 0.00 17.75 4.87 4.64 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 198 Summary for Subcatchment DA 3: Drainage Area 3 Runoff = 0.97 cfs @ 12.05 hrs, Volume= 0.061 af, Depth> 4.89" Routed to Pond RCVR 3 : RCVR 3 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.140 98 Paved parking, HSG D 0.010 80 >75% Grass cover, Good, HSG D 0.150 97 Weighted Average 0.010 6.67% Pervious Area 0.140 93.33% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 19 0.0100 0.05 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" 1.2 56 0.0100 0.77 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" 7.2 75 Total Subcatchment DA 3: Drainage Area 3

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 199 Subcatchment DA 3: Drainage Area 3 Hydrograph Runoff 0.97 cfs 1 extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Runoff Area=0.150 ac Runoff Volume=0.061 af Runoff Depth>4.89" Flow Length=75' Slope=0.0100 '/' Tc=7.2 min CN=97 Flow (cfs) 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 200 Hydrograph for Subcatchment DA 3: Drainage Area 3 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.40 0.02 18.00 4.89 4.54 0.01 0.25 0.01 0.00 0.00 9.25 0.71 0.43 0.02 18.25 4.91 4.56 0.01 0.50 0.02 0.00 0.00 9.50 0.74 0.47 0.02 18.50 4.93 4.58 0.01 0.75 0.04 0.00 0.00 9.75 0.79 0.51 0.02 18.75 4.95 4.60 0.01 1.00 0.05 0.00 0.00 10.00 0.83 0.55 0.03 19.00 4.97 4.61 0.01 1.25 0.06 0.00 0.00 10.25 0.88 0.60 0.03 19.25 4.99 4.63 0.01 1.50 0.07 0.00 0.00 10.50 0.94 0.65 0.03 19.50 5.00 4.65 0.01 1.75 0.09 0.00 0.00 10.75 1.00 0.71 0.04 19.75 5.02 4.67 0.01 2.00 0.10 0.00 0.00 11.00 1.08 0.78 0.04 20.00 5.03 4.68 0.01 2.25 0.11 0.01 0.00 11.25 1.17 0.87 0.05 20.25 5.05 4.70 0.01 2.50 0.13 0.01 0.00 11.50 1.30 0.99 0.07 20.50 5.07 4.71 0.01 2.75 0.14 0.02 0.00 11.75 1.73 1.41 0.25 20.75 5.08 4.73 0.01 3.00 0.16 0.02 0.00 12.00 2.90 2.56 0.77 21.00 5.10 4.74 0.01 3.25 0.17 0.03 0.00 12.25 3.58 3.23 0.39 21.25 5.11 4.76 0.01 3.50 0.19 0.04 0.00 12.50 3.98 3.63 0.23 21.50 5.12 4.77 0.01 3.75 0.20 0.04 0.00 12.75 4.09 3.74 0.07 21.75 5.14 4.78 0.01 4.00 0.22 0.05 0.01 13.00 4.18 3.83 0.05 22.00 5.15 4.80 0.01 4.25 0.23 0.06 0.01 13.25 4.26 3.91 0.04 22.25 5.16 4.81 0.01 4.50 0.25 0.07 0.01 13.50 4.32 3.97 0.04 22.50 5.18 4.82 0.01 4.75 0.27 0.08 0.01 13.75 4.38 4.03 0.03 22.75 5.19 4.84 0.01 5.00 0.28 0.09 0.01 14.00 4.43 4.07 0.03 23.00 5.20 4.85 0.01 5.25 0.30 0.10 0.01 14.25 4.47 4.12 0.03 23.25 5.21 4.86 0.01 5.50 0.32 0.12 0.01 14.50 4.51 4.16 0.02 23.50 5.23 4.87 0.01 5.75 0.34 0.13 0.01 14.75 4.55 4.20 0.02 23.75 5.24 4.88 0.01 6.00 0.36 0.15 0.01 15.00 4.58 4.23 0.02 24.00 5.25 4.90 0.01 6.25 0.38 0.16 0.01 15.25 4.62 4.27 0.02 6.50 0.40 0.18 0.01 15.50 4.65 4.30 0.02 6.75 0.42 0.19 0.01 15.75 4.68 4.33 0.02 7.00 0.45 0.21 0.01 16.00 4.71 4.36 0.02 7.25 0.47 0.23 0.01 16.25 4.73 4.38 0.02 7.50 0.49 0.25 0.01 16.50 4.76 4.41 0.02 7.75 0.52 0.27 0.01 16.75 4.78 4.43 0.01 8.00 0.55 0.30 0.01 17.00 4.81 4.46 0.01 8.25 0.57 0.32 0.01 17.25 4.83 4.48 0.01 8.50 0.60 0.35 0.02 17.50 4.85 4.50 0.01 8.75 0.64 0.37 0.02 17.75 4.87 4.52 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 201 Summary for Subcatchment DA 4: Drainage Area 4 Runoff = 0.53 cfs @ 12.04 hrs, Volume= 0.032 af, Depth> 4.78" Routed to Pond RCVR 4 : RCVR 4 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.070 98 Paved parking, HSG D 0.010 80 >75% Grass cover, Good, HSG D 0.080 96 Weighted Average 0.010 12.50% Pervious Area 0.070 87.50% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.3 20 0.0100 0.05 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment DA 4: Drainage Area 4

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 202 Subcatchment DA 4: Drainage Area 4 Hydrograph Runoff 0.55 0.53 cfs extreme_precip_tables_output (29) 24-hr S1 100-yr 0.5 Rainfall=5.25" Runoff Area=0.080 ac 0.45 Runoff Volume=0.032 af Runoff Depth>4.78" Flow Length=20' 0.4 Slope=0.0100 '/' Tc=6.3 min 0.35 CN=96 Flow (cfs) 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 203 Hydrograph for Subcatchment DA 4: Drainage Area 4 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.34 0.01 18.00 4.89 4.43 0.01 0.25 0.01 0.00 0.00 9.25 0.71 0.37 0.01 18.25 4.91 4.45 0.01 0.50 0.02 0.00 0.00 9.50 0.74 0.41 0.01 18.50 4.93 4.46 0.01 0.75 0.04 0.00 0.00 9.75 0.79 0.44 0.01 18.75 4.95 4.48 0.01 1.00 0.05 0.00 0.00 10.00 0.83 0.48 0.01 19.00 4.97 4.50 0.01 1.25 0.06 0.00 0.00 10.25 0.88 0.53 0.01 19.25 4.99 4.52 0.01 1.50 0.07 0.00 0.00 10.50 0.94 0.58 0.02 19.50 5.00 4.53 0.01 1.75 0.09 0.00 0.00 10.75 1.00 0.63 0.02 19.75 5.02 4.55 0.01 2.00 0.10 0.00 0.00 11.00 1.08 0.70 0.02 20.00 5.03 4.57 0.01 2.25 0.11 0.00 0.00 11.25 1.17 0.79 0.03 20.25 5.05 4.58 0.01 2.50 0.13 0.00 0.00 11.50 1.30 0.90 0.04 20.50 5.07 4.60 0.00 2.75 0.14 0.01 0.00 11.75 1.73 1.31 0.13 20.75 5.08 4.61 0.00 3.00 0.16 0.01 0.00 12.00 2.90 2.45 0.46 21.00 5.10 4.63 0.00 3.25 0.17 0.01 0.00 12.25 3.58 3.12 0.20 21.25 5.11 4.64 0.00 3.50 0.19 0.02 0.00 12.50 3.98 3.52 0.12 21.50 5.12 4.66 0.00 3.75 0.20 0.03 0.00 12.75 4.09 3.63 0.04 21.75 5.14 4.67 0.00 4.00 0.22 0.03 0.00 13.00 4.18 3.72 0.03 22.00 5.15 4.68 0.00 4.25 0.23 0.04 0.00 13.25 4.26 3.80 0.02 22.25 5.16 4.70 0.00 4.50 0.25 0.05 0.00 13.50 4.32 3.86 0.02 22.50 5.18 4.71 0.00 4.75 0.27 0.06 0.00 13.75 4.38 3.91 0.02 22.75 5.19 4.72 0.00 5.00 0.28 0.06 0.00 14.00 4.43 3.96 0.02 23.00 5.20 4.73 0.00 5.25 0.30 0.08 0.00 14.25 4.47 4.01 0.01 23.25 5.21 4.75 0.00 5.50 0.32 0.09 0.00 14.50 4.51 4.05 0.01 23.50 5.23 4.76 0.00 5.75 0.34 0.10 0.00 14.75 4.55 4.09 0.01 23.75 5.24 4.77 0.00 6.00 0.36 0.11 0.00 15.00 4.58 4.12 0.01 24.00 5.25 4.78 0.00 6.25 0.38 0.12 0.00 15.25 4.62 4.15 0.01 6.50 0.40 0.14 0.00 15.50 4.65 4.18 0.01 6.75 0.42 0.15 0.00 15.75 4.68 4.21 0.01 7.00 0.45 0.17 0.01 16.00 4.71 4.24 0.01 7.25 0.47 0.19 0.01 16.25 4.73 4.27 0.01 7.50 0.49 0.20 0.01 16.50 4.76 4.29 0.01 7.75 0.52 0.22 0.01 16.75 4.78 4.32 0.01 8.00 0.55 0.24 0.01 17.00 4.81 4.34 0.01 8.25 0.57 0.27 0.01 17.25 4.83 4.36 0.01 8.50 0.60 0.29 0.01 17.50 4.85 4.39 0.01 8.75 0.64 0.32 0.01 17.75 4.87 4.41 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 204 Summary for Subcatchment DA 5: Drainage Area 5 Runoff = 0.40 cfs @ 11.98 hrs, Volume= 0.021 af, Depth> 5.01" Routed to Pond RCVR 5 : RCVR 5 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.050 98 Paved parking, HSG D 0.050 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 1.7 60 0.0050 0.59 Sheet Flow, Smooth surfaces n= 0.011 P2= 2.20" Subcatchment DA 5: Drainage Area 5

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 205 Subcatchment DA 5: Drainage Area 5 Hydrograph 0.44 Runoff 0.42 0.40 cfs 0.4 extreme_precip_tables_output (29) 24-hr S1 100-yr 0.38 Rainfall=5.25" 0.36 Runoff Area=0.050 ac 0.34 Runoff Volume=0.021 af Runoff Depth>5.01" 0.32 Flow Length=60' 0.3 Slope=0.0050 '/' 0.28 Tc=1.7 min 0.26 CN=98 Flow (cfs) 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 206 Hydrograph for Subcatchment DA 5: Drainage Area 5 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.47 0.01 18.00 4.89 4.66 0.00 0.25 0.01 0.00 0.00 9.25 0.71 0.51 0.01 18.25 4.91 4.68 0.00 0.50 0.02 0.00 0.00 9.50 0.74 0.55 0.01 18.50 4.93 4.69 0.00 0.75 0.04 0.00 0.00 9.75 0.79 0.59 0.01 18.75 4.95 4.71 0.00 1.00 0.05 0.00 0.00 10.00 0.83 0.63 0.01 19.00 4.97 4.73 0.00 1.25 0.06 0.00 0.00 10.25 0.88 0.68 0.01 19.25 4.99 4.75 0.00 1.50 0.07 0.00 0.00 10.50 0.94 0.73 0.01 19.50 5.00 4.77 0.00 1.75 0.09 0.01 0.00 10.75 1.00 0.80 0.01 19.75 5.02 4.78 0.00 2.00 0.10 0.01 0.00 11.00 1.08 0.87 0.02 20.00 5.03 4.80 0.00 2.25 0.11 0.02 0.00 11.25 1.17 0.96 0.02 20.25 5.05 4.81 0.00 2.50 0.13 0.03 0.00 11.50 1.30 1.08 0.03 20.50 5.07 4.83 0.00 2.75 0.14 0.03 0.00 11.75 1.73 1.51 0.10 20.75 5.08 4.84 0.00 3.00 0.16 0.04 0.00 12.00 2.90 2.67 0.38 21.00 5.10 4.86 0.00 3.25 0.17 0.05 0.00 12.25 3.58 3.34 0.10 21.25 5.11 4.87 0.00 3.50 0.19 0.06 0.00 12.50 3.98 3.74 0.07 21.50 5.12 4.89 0.00 3.75 0.20 0.07 0.00 12.75 4.09 3.86 0.02 21.75 5.14 4.90 0.00 4.00 0.22 0.08 0.00 13.00 4.18 3.95 0.02 22.00 5.15 4.91 0.00 4.25 0.23 0.09 0.00 13.25 4.26 4.02 0.01 22.25 5.16 4.93 0.00 4.50 0.25 0.11 0.00 13.50 4.32 4.08 0.01 22.50 5.18 4.94 0.00 4.75 0.27 0.12 0.00 13.75 4.38 4.14 0.01 22.75 5.19 4.95 0.00 5.00 0.28 0.13 0.00 14.00 4.43 4.19 0.01 23.00 5.20 4.97 0.00 5.25 0.30 0.15 0.00 14.25 4.47 4.23 0.01 23.25 5.21 4.98 0.00 5.50 0.32 0.16 0.00 14.50 4.51 4.28 0.01 23.50 5.23 4.99 0.00 5.75 0.34 0.18 0.00 14.75 4.55 4.31 0.01 23.75 5.24 5.00 0.00 6.00 0.36 0.19 0.00 15.00 4.58 4.35 0.01 24.00 5.25 5.01 0.00 6.25 0.38 0.21 0.00 15.25 4.62 4.38 0.01 6.50 0.40 0.23 0.00 15.50 4.65 4.41 0.01 6.75 0.42 0.25 0.00 15.75 4.68 4.44 0.01 7.00 0.45 0.27 0.00 16.00 4.71 4.47 0.01 7.25 0.47 0.29 0.00 16.25 4.73 4.50 0.01 7.50 0.49 0.31 0.00 16.50 4.76 4.52 0.01 7.75 0.52 0.34 0.00 16.75 4.78 4.55 0.00 8.00 0.55 0.36 0.01 17.00 4.81 4.57 0.00 8.25 0.57 0.39 0.01 17.25 4.83 4.59 0.00 8.50 0.60 0.41 0.01 17.50 4.85 4.61 0.00 8.75 0.64 0.44 0.01 17.75 4.87 4.64 0.00

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 207 Summary for Subcatchment DA 6: Drainage Area 6 Runoff = 0.63 cfs @ 12.16 hrs, Volume= 0.047 af, Depth> 3.79" Routed to Pond SWALE : SWALE Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Area (ac) CN Description 0.060 98 Paved parking, HSG D 0.090 80 >75% Grass cover, Good, HSG D 0.150 87 Weighted Average 0.090 60.00% Pervious Area 0.060 40.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 15.0 40 0.0045 0.04 Sheet Flow, Grass: Dense n= 0.240 P2= 2.20" Subcatchment DA 6: Drainage Area 6

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 208 Subcatchment DA 6: Drainage Area 6 Hydrograph 0.7 Runoff 0.63 cfs 0.65 extreme_precip_tables_output (29) 24-hr S1 100-yr 0.6 Rainfall=5.25" Runoff Area=0.150 ac 0.55 Runoff Volume=0.047 af Runoff Depth>3.79" 0.5 Flow Length=40' 0.45 Slope=0.0045 '/' Tc=15.0 min 0.4 CN=87 Flow (cfs) 0.35 0.3 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 209 Hydrograph for Subcatchment DA 6: Drainage Area 6 Time Precip. Excess Runoff Time Precip. Excess Runoff Time Precip. Excess Runoff (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) (hours) (inches) (inches) (cfs) 0.00 0.00 0.00 0.00 9.00 0.67 0.07 0.01 18.00 4.89 3.47 0.01 0.25 0.01 0.00 0.00 9.25 0.71 0.09 0.01 18.25 4.91 3.48 0.01 0.50 0.02 0.00 0.00 9.50 0.74 0.10 0.01 18.50 4.93 3.50 0.01 0.75 0.04 0.00 0.00 9.75 0.79 0.12 0.01 18.75 4.95 3.52 0.01 1.00 0.05 0.00 0.00 10.00 0.83 0.14 0.01 19.00 4.97 3.54 0.01 1.25 0.06 0.00 0.00 10.25 0.88 0.16 0.01 19.25 4.99 3.55 0.01 1.50 0.07 0.00 0.00 10.50 0.94 0.19 0.02 19.50 5.00 3.57 0.01 1.75 0.09 0.00 0.00 10.75 1.00 0.23 0.02 19.75 5.02 3.58 0.01 2.00 0.10 0.00 0.00 11.00 1.08 0.27 0.02 20.00 5.03 3.60 0.01 2.25 0.11 0.00 0.00 11.25 1.17 0.32 0.03 20.25 5.05 3.61 0.01 2.50 0.13 0.00 0.00 11.50 1.30 0.40 0.04 20.50 5.07 3.63 0.01 2.75 0.14 0.00 0.00 11.75 1.73 0.70 0.12 20.75 5.08 3.64 0.01 3.00 0.16 0.00 0.00 12.00 2.90 1.65 0.30 21.00 5.10 3.66 0.01 3.25 0.17 0.00 0.00 12.25 3.58 2.25 0.53 21.25 5.11 3.67 0.01 3.50 0.19 0.00 0.00 12.50 3.98 2.62 0.27 21.50 5.12 3.68 0.01 3.75 0.20 0.00 0.00 12.75 4.09 2.72 0.12 21.75 5.14 3.70 0.01 4.00 0.22 0.00 0.00 13.00 4.18 2.81 0.06 22.00 5.15 3.71 0.01 4.25 0.23 0.00 0.00 13.25 4.26 2.87 0.04 22.25 5.16 3.72 0.01 4.50 0.25 0.00 0.00 13.50 4.32 2.93 0.04 22.50 5.18 3.73 0.01 4.75 0.27 0.00 0.00 13.75 4.38 2.98 0.03 22.75 5.19 3.75 0.01 5.00 0.28 0.00 0.00 14.00 4.43 3.03 0.03 23.00 5.20 3.76 0.01 5.25 0.30 0.00 0.00 14.25 4.47 3.07 0.03 23.25 5.21 3.77 0.01 5.50 0.32 0.00 0.00 14.50 4.51 3.11 0.02 23.50 5.23 3.78 0.01 5.75 0.34 0.00 0.00 14.75 4.55 3.15 0.02 23.75 5.24 3.79 0.01 6.00 0.36 0.00 0.00 15.00 4.58 3.18 0.02 24.00 5.25 3.80 0.01 6.25 0.38 0.00 0.00 15.25 4.62 3.21 0.02 6.50 0.40 0.01 0.00 15.50 4.65 3.24 0.02 6.75 0.42 0.01 0.00 15.75 4.68 3.27 0.02 7.00 0.45 0.01 0.00 16.00 4.71 3.29 0.02 7.25 0.47 0.02 0.00 16.25 4.73 3.32 0.02 7.50 0.49 0.02 0.00 16.50 4.76 3.34 0.01 7.75 0.52 0.03 0.00 16.75 4.78 3.36 0.01 8.00 0.55 0.04 0.00 17.00 4.81 3.39 0.01 8.25 0.57 0.04 0.00 17.25 4.83 3.41 0.01 8.50 0.60 0.05 0.01 17.50 4.85 3.43 0.01 8.75 0.64 0.06 0.01 17.75 4.87 3.45 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 210 Summary for Pond EX RCVR: EX RCVR Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 4.30" for 100-yr event Inflow = 1.64 cfs @ 12.35 hrs, Volume= 0.179 af Outflow = 1.64 cfs @ 12.35 hrs, Volume= 0.179 af, Atten= 0%, Lag= 0.0 min Primary = 1.64 cfs @ 12.35 hrs, Volume= 0.179 af Routed to Link POST : Post Development Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 900.50' @ 12.35 hrs Device Routing Invert Outlet Devices #1 Primary 899.60' 12.0" Round 12" HDPE L= 121.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 899.60' / 899.23' S= 0.0031 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf Primary OutFlow Max=1.62 cfs @ 12.35 hrs HW=900.50' TW=0.00' (Dynamic Tailwater) 1=12" HDPE (Barrel Controls 1.62 cfs @ 2.89 fps) Pond EX RCVR: EX RCVR 12" HDPE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 211 Pond EX RCVR: EX RCVR Hydrograph Inflow 1.64 cfs Primary 1.64 cfs Inflow Area=0.500 ac Peak Elev=900.50' 12.0" Round Culvert Flow (cfs) 1 n=0.013 L=121.0' S=0.0031 '/' 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 212 Pond EX RCVR: EX RCVR Stage-Discharge Primary Elevation (feet) 900 12" HDPE 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 213 Pond EX RCVR: EX RCVR Stage-Area-Storage Storage Elevation (feet) 900 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 214 Hydrograph for Pond EX RCVR: EX RCVR Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 899.60 0.00 9.00 0.03 899.71 0.03 18.00 0.04 899.73 0.04 0.25 0.00 899.60 0.00 9.25 0.03 899.71 0.03 18.25 0.04 899.73 0.04 0.50 0.00 899.60 0.00 9.50 0.03 899.72 0.03 18.50 0.04 899.73 0.04 0.75 0.00 899.60 0.00 9.75 0.03 899.72 0.03 18.75 0.04 899.73 0.04 1.00 0.00 899.61 0.00 10.00 0.04 899.73 0.04 19.00 0.04 899.73 0.04 1.25 0.00 899.62 0.00 10.25 0.04 899.74 0.04 19.25 0.04 899.72 0.04 1.50 0.00 899.63 0.00 10.50 0.05 899.74 0.05 19.50 0.04 899.72 0.04 1.75 0.00 899.63 0.00 10.75 0.06 899.75 0.06 19.75 0.03 899.72 0.03 2.00 0.00 899.64 0.00 11.00 0.07 899.77 0.07 20.00 0.03 899.72 0.03 2.25 0.00 899.64 0.00 11.25 0.11 899.81 0.11 20.25 0.03 899.72 0.03 2.50 0.00 899.65 0.00 11.50 0.17 899.86 0.17 20.50 0.03 899.72 0.03 2.75 0.01 899.65 0.01 11.75 0.53 900.07 0.53 20.75 0.03 899.72 0.03 3.00 0.01 899.65 0.01 12.00 1.48 900.44 1.48 21.00 0.03 899.71 0.03 3.25 0.01 899.66 0.01 12.25 0.53 900.07 0.53 21.25 0.03 899.71 0.03 3.50 0.01 899.66 0.01 12.50 1.59 900.49 1.59 21.50 0.03 899.71 0.03 3.75 0.01 899.66 0.01 12.75 0.85 900.21 0.85 21.75 0.03 899.71 0.03 4.00 0.01 899.66 0.01 13.00 0.99 900.26 0.99 22.00 0.03 899.71 0.03 4.25 0.01 899.66 0.01 13.25 0.42 900.02 0.42 22.25 0.03 899.71 0.03 4.50 0.01 899.67 0.01 13.50 0.29 899.94 0.29 22.50 0.03 899.71 0.03 4.75 0.01 899.67 0.01 13.75 0.19 899.88 0.19 22.75 0.03 899.71 0.03 5.00 0.01 899.67 0.01 14.00 0.14 899.84 0.14 23.00 0.03 899.71 0.03 5.25 0.01 899.67 0.01 14.25 0.12 899.82 0.12 23.25 0.03 899.70 0.03 5.50 0.01 899.67 0.01 14.50 0.10 899.80 0.10 23.50 0.02 899.70 0.02 5.75 0.01 899.68 0.01 14.75 0.09 899.79 0.09 23.75 0.02 899.70 0.02 6.00 0.01 899.68 0.01 15.00 0.08 899.78 0.08 24.00 0.02 899.70 0.02 6.25 0.01 899.68 0.01 15.25 0.07 899.77 0.07 6.50 0.02 899.68 0.02 15.50 0.07 899.77 0.07 6.75 0.02 899.68 0.02 15.75 0.06 899.76 0.06 7.00 0.02 899.69 0.02 16.00 0.06 899.76 0.06 7.25 0.02 899.69 0.02 16.25 0.06 899.75 0.06 7.50 0.02 899.69 0.02 16.50 0.05 899.75 0.05 7.75 0.02 899.69 0.02 16.75 0.05 899.75 0.05 8.00 0.02 899.70 0.02 17.00 0.05 899.74 0.05 8.25 0.02 899.70 0.02 17.25 0.05 899.74 0.05 8.50 0.02 899.70 0.02 17.50 0.05 899.74 0.05 8.75 0.03 899.71 0.03 17.75 0.04 899.74 0.04

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 215 Summary for Pond RCVR 1: RCVR 1 Inflow Area = 0.340 ac, 70.59% Impervious, Inflow Depth > 4.02" for 100-yr event Inflow = 1.35 cfs @ 12.50 hrs, Volume= 0.114 af Outflow = 1.35 cfs @ 12.50 hrs, Volume= 0.114 af, Atten= 0%, Lag= 0.0 min Primary = 1.35 cfs @ 12.50 hrs, Volume= 0.114 af Routed to Pond RCVR 2 : RCVR 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 902.22' @ 12.21 hrs Device Routing Invert Outlet Devices #1 Primary 900.56' 8.0" Round RCVR 1 to RCVR 2 L= 59.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.56' / 900.32' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.32 cfs @ 12.50 hrs HW=902.06' TW=902.00' (Dynamic Tailwater) 1=RCVR 1 to RCVR 2 (Outlet Controls 0.32 cfs @ 0.91 fps) Pond RCVR 1: RCVR 1 RCVR 1 to RCVR 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 216 Pond RCVR 1: RCVR 1 Hydrograph Inflow 1.35 cfs Primary 1.35 cfs Inflow Area=0.340 ac Peak Elev=902.22' 1 8.0" Round Culvert Flow (cfs) n=0.013 L=59.0' S=0.0041 '/' 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 217 Pond RCVR 1: RCVR 1 Stage-Discharge Primary 902 Elevation (feet) 901 RCVR 1 to RCVR 2 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 218 Pond RCVR 1: RCVR 1 Stage-Area-Storage Storage 902 Elevation (feet) 901 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 219 Hydrograph for Pond RCVR 1: RCVR 1 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.56 0.00 9.00 0.01 900.63 0.01 18.00 0.03 900.68 0.03 0.25 0.00 900.56 0.00 9.25 0.01 900.63 0.01 18.25 0.03 900.68 0.03 0.50 0.00 900.56 0.00 9.50 0.01 900.63 0.01 18.50 0.03 900.68 0.03 0.75 0.00 900.56 0.00 9.75 0.01 900.63 0.01 18.75 0.03 900.68 0.03 1.00 0.00 900.57 0.00 10.00 0.01 900.64 0.01 19.00 0.03 900.67 0.03 1.25 0.00 900.58 0.00 10.25 0.01 900.64 0.01 19.25 0.02 900.67 0.02 1.50 0.00 900.58 0.00 10.50 0.01 900.65 0.01 19.50 0.02 900.67 0.02 1.75 0.00 900.58 0.00 10.75 0.02 900.66 0.02 19.75 0.02 900.67 0.02 2.00 0.00 900.59 0.00 11.00 0.03 900.68 0.03 20.00 0.02 900.67 0.02 2.25 0.00 900.59 0.00 11.25 0.05 900.72 0.05 20.25 0.02 900.67 0.02 2.50 0.00 900.59 0.00 11.50 0.09 900.77 0.09 20.50 0.02 900.66 0.02 2.75 0.00 900.59 0.00 11.75 0.25 900.96 0.25 20.75 0.02 900.66 0.02 3.00 0.00 900.59 0.00 12.00 0.64 901.65 0.64 21.00 0.02 900.66 0.02 3.25 0.00 900.60 0.00 12.25 0.12 901.88 0.12 21.25 0.02 900.66 0.02 3.50 0.00 900.60 0.00 12.50 1.35 902.07 1.35 21.50 0.02 900.66 0.02 3.75 0.00 900.60 0.00 12.75 0.77 901.26 0.77 21.75 0.02 900.66 0.02 4.00 0.00 900.60 0.00 13.00 0.93 901.50 0.93 22.00 0.02 900.66 0.02 4.25 0.00 900.60 0.00 13.25 0.37 901.06 0.37 22.25 0.02 900.66 0.02 4.50 0.00 900.60 0.00 13.50 0.25 900.93 0.25 22.50 0.02 900.66 0.02 4.75 0.00 900.60 0.00 13.75 0.16 900.85 0.16 22.75 0.02 900.66 0.02 5.00 0.00 900.60 0.00 14.00 0.11 900.80 0.11 23.00 0.02 900.65 0.02 5.25 0.00 900.60 0.00 14.25 0.09 900.77 0.09 23.25 0.02 900.65 0.02 5.50 0.00 900.61 0.00 14.50 0.07 900.75 0.07 23.50 0.02 900.65 0.02 5.75 0.00 900.61 0.00 14.75 0.06 900.74 0.06 23.75 0.02 900.65 0.02 6.00 0.00 900.61 0.00 15.00 0.06 900.73 0.06 24.00 0.02 900.65 0.02 6.25 0.00 900.61 0.00 15.25 0.05 900.72 0.05 6.50 0.00 900.61 0.00 15.50 0.05 900.71 0.05 6.75 0.00 900.61 0.00 15.75 0.04 900.71 0.04 7.00 0.00 900.61 0.00 16.00 0.04 900.70 0.04 7.25 0.01 900.61 0.01 16.25 0.04 900.70 0.04 7.50 0.01 900.62 0.01 16.50 0.04 900.70 0.04 7.75 0.01 900.62 0.01 16.75 0.04 900.69 0.04 8.00 0.01 900.62 0.01 17.00 0.03 900.69 0.03 8.25 0.01 900.62 0.01 17.25 0.03 900.69 0.03 8.50 0.01 900.62 0.01 17.50 0.03 900.69 0.03 8.75 0.01 900.62 0.01 17.75 0.03 900.68 0.03

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 220 Summary for Pond RCVR 2: RCVR 2 Inflow Area = 0.500 ac, 78.00% Impervious, Inflow Depth > 4.30" for 100-yr event Inflow = 1.64 cfs @ 12.35 hrs, Volume= 0.179 af Outflow = 1.64 cfs @ 12.35 hrs, Volume= 0.179 af, Atten= 0%, Lag= 0.0 min Primary = 1.64 cfs @ 12.35 hrs, Volume= 0.179 af Routed to Pond EX RCVR : EX RCVR Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 902.12' @ 12.35 hrs Device Routing Invert Outlet Devices #1 Primary 900.32' 8.0" Round RCVR 2 to EX RCVR L= 72.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.32' / 899.60' S= 0.0100 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=1.53 cfs @ 12.35 hrs HW=902.09' TW=900.50' (Dynamic Tailwater) 1=RCVR 2 to EX RCVR (Outlet Controls 1.53 cfs @ 4.37 fps) Pond RCVR 2: RCVR 2 RCVR 2 to EX RCVR

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 221 Pond RCVR 2: RCVR 2 Hydrograph Inflow 1.64 cfs Primary 1.64 cfs Inflow Area=0.500 ac Peak Elev=902.12' 8.0" Round Culvert Flow (cfs) 1 n=0.013 L=72.0' S=0.0100 '/' 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 222 Pond RCVR 2: RCVR 2 Stage-Discharge Primary 902 Elevation (feet) 901 RCVR 2 to EX RCVR 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 223 Pond RCVR 2: RCVR 2 Stage-Area-Storage Storage 902 Elevation (feet) 901 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 224 Hydrograph for Pond RCVR 2: RCVR 2 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.32 0.00 9.00 0.03 900.41 0.03 18.00 0.04 900.44 0.04 0.25 0.00 900.32 0.00 9.25 0.03 900.42 0.03 18.25 0.04 900.43 0.04 0.50 0.00 900.32 0.00 9.50 0.03 900.42 0.03 18.50 0.04 900.43 0.04 0.75 0.00 900.32 0.00 9.75 0.03 900.43 0.03 18.75 0.04 900.43 0.04 1.00 0.00 900.33 0.00 10.00 0.04 900.43 0.04 19.00 0.04 900.43 0.04 1.25 0.00 900.34 0.00 10.25 0.04 900.44 0.04 19.25 0.04 900.43 0.04 1.50 0.00 900.34 0.00 10.50 0.05 900.44 0.05 19.50 0.04 900.43 0.04 1.75 0.00 900.35 0.00 10.75 0.06 900.45 0.06 19.75 0.03 900.43 0.03 2.00 0.00 900.35 0.00 11.00 0.07 900.47 0.07 20.00 0.03 900.42 0.03 2.25 0.00 900.36 0.00 11.25 0.11 900.51 0.11 20.25 0.03 900.42 0.03 2.50 0.00 900.36 0.00 11.50 0.17 900.56 0.17 20.50 0.03 900.42 0.03 2.75 0.01 900.36 0.01 11.75 0.53 900.77 0.53 20.75 0.03 900.42 0.03 3.00 0.01 900.36 0.01 12.00 1.48 901.87 1.48 21.00 0.03 900.42 0.03 3.25 0.01 900.37 0.01 12.25 0.53 900.86 0.53 21.25 0.03 900.42 0.03 3.50 0.01 900.37 0.01 12.50 1.59 902.01 1.59 21.50 0.03 900.42 0.03 3.75 0.01 900.37 0.01 12.75 0.85 900.91 0.85 21.75 0.03 900.42 0.03 4.00 0.01 900.37 0.01 13.00 0.99 901.00 0.99 22.00 0.03 900.41 0.03 4.25 0.01 900.38 0.01 13.25 0.42 900.74 0.42 22.25 0.03 900.41 0.03 4.50 0.01 900.38 0.01 13.50 0.29 900.64 0.29 22.50 0.03 900.41 0.03 4.75 0.01 900.38 0.01 13.75 0.19 900.58 0.19 22.75 0.03 900.41 0.03 5.00 0.01 900.38 0.01 14.00 0.14 900.54 0.14 23.00 0.03 900.41 0.03 5.25 0.01 900.38 0.01 14.25 0.12 900.52 0.12 23.25 0.03 900.41 0.03 5.50 0.01 900.38 0.01 14.50 0.10 900.50 0.10 23.50 0.02 900.41 0.02 5.75 0.01 900.39 0.01 14.75 0.09 900.49 0.09 23.75 0.02 900.41 0.02 6.00 0.01 900.39 0.01 15.00 0.08 900.48 0.08 24.00 0.02 900.41 0.02 6.25 0.01 900.39 0.01 15.25 0.07 900.47 0.07 6.50 0.02 900.39 0.02 15.50 0.07 900.47 0.07 6.75 0.02 900.39 0.02 15.75 0.06 900.46 0.06 7.00 0.02 900.39 0.02 16.00 0.06 900.46 0.06 7.25 0.02 900.40 0.02 16.25 0.06 900.46 0.06 7.50 0.02 900.40 0.02 16.50 0.05 900.45 0.05 7.75 0.02 900.40 0.02 16.75 0.05 900.45 0.05 8.00 0.02 900.40 0.02 17.00 0.05 900.45 0.05 8.25 0.02 900.41 0.02 17.25 0.05 900.44 0.05 8.50 0.02 900.41 0.02 17.50 0.05 900.44 0.05 8.75 0.03 900.41 0.03 17.75 0.04 900.44 0.04

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 225 Summary for Pond RCVR 3: RCVR 3 Inflow Area = 0.150 ac, 93.33% Impervious, Inflow Depth > 4.89" for 100-yr event Inflow = 0.97 cfs @ 12.05 hrs, Volume= 0.061 af Outflow = 0.97 cfs @ 12.05 hrs, Volume= 0.061 af, Atten= 0%, Lag= 0.0 min Primary = 0.97 cfs @ 12.05 hrs, Volume= 0.061 af Routed to Pond RCVR 2 : RCVR 2 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 902.30' @ 12.05 hrs Device Routing Invert Outlet Devices #1 Primary 900.48' 8.0" Round RCVR 3 to RCVR 2 L= 39.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 900.48' / 900.32' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=1.32 cfs @ 12.05 hrs HW=902.27' TW=901.47' (Dynamic Tailwater) 1=RCVR 3 to RCVR 2 (Outlet Controls 1.32 cfs @ 3.78 fps) Pond RCVR 3: RCVR 3 RCVR 3 to RCVR 2

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 226 Pond RCVR 3: RCVR 3 Hydrograph Inflow 0.97 cfs Primary 0.97 cfs 1 Inflow Area=0.150 ac Peak Elev=902.30' 8.0" Round Culvert Flow (cfs) n=0.013 L=39.0' S=0.0041 '/' 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 227 Pond RCVR 3: RCVR 3 Stage-Discharge Primary 902 Elevation (feet) 901 RCVR 3 to RCVR 2 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 228 Pond RCVR 3: RCVR 3 Stage-Area-Storage Storage 902 Elevation (feet) 901 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 229 Hydrograph for Pond RCVR 3: RCVR 3 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 900.48 0.00 9.00 0.02 900.58 0.02 18.00 0.01 900.56 0.01 0.25 0.00 900.48 0.00 9.25 0.02 900.58 0.02 18.25 0.01 900.56 0.01 0.50 0.00 900.48 0.00 9.50 0.02 900.58 0.02 18.50 0.01 900.56 0.01 0.75 0.00 900.48 0.00 9.75 0.02 900.59 0.02 18.75 0.01 900.56 0.01 1.00 0.00 900.48 0.00 10.00 0.03 900.59 0.03 19.00 0.01 900.56 0.01 1.25 0.00 900.48 0.00 10.25 0.03 900.60 0.03 19.25 0.01 900.56 0.01 1.50 0.00 900.49 0.00 10.50 0.03 900.61 0.03 19.50 0.01 900.56 0.01 1.75 0.00 900.50 0.00 10.75 0.04 900.62 0.04 19.75 0.01 900.56 0.01 2.00 0.00 900.51 0.00 11.00 0.04 900.63 0.04 20.00 0.01 900.55 0.01 2.25 0.00 900.51 0.00 11.25 0.05 900.65 0.05 20.25 0.01 900.55 0.01 2.50 0.00 900.52 0.00 11.50 0.07 900.68 0.07 20.50 0.01 900.55 0.01 2.75 0.00 900.52 0.00 11.75 0.25 900.88 0.25 20.75 0.01 900.55 0.01 3.00 0.00 900.52 0.00 12.00 0.77 901.68 0.77 21.00 0.01 900.55 0.01 3.25 0.00 900.53 0.00 12.25 0.39 901.95 0.39 21.25 0.01 900.55 0.01 3.50 0.00 900.53 0.00 12.50 0.23 900.85 0.23 21.50 0.01 900.55 0.01 3.75 0.00 900.53 0.00 12.75 0.07 900.70 0.07 21.75 0.01 900.55 0.01 4.00 0.01 900.53 0.01 13.00 0.05 900.68 0.05 22.00 0.01 900.55 0.01 4.25 0.01 900.53 0.01 13.25 0.04 900.84 0.04 22.25 0.01 900.55 0.01 4.50 0.01 900.54 0.01 13.50 0.04 900.69 0.04 22.50 0.01 900.55 0.01 4.75 0.01 900.54 0.01 13.75 0.03 900.65 0.03 22.75 0.01 900.55 0.01 5.00 0.01 900.54 0.01 14.00 0.03 900.63 0.03 23.00 0.01 900.55 0.01 5.25 0.01 900.54 0.01 14.25 0.03 900.61 0.03 23.25 0.01 900.55 0.01 5.50 0.01 900.54 0.01 14.50 0.02 900.61 0.02 23.50 0.01 900.54 0.01 5.75 0.01 900.55 0.01 14.75 0.02 900.60 0.02 23.75 0.01 900.54 0.01 6.00 0.01 900.55 0.01 15.00 0.02 900.59 0.02 24.00 0.01 900.54 0.01 6.25 0.01 900.55 0.01 15.25 0.02 900.59 0.02 6.50 0.01 900.55 0.01 15.50 0.02 900.59 0.02 6.75 0.01 900.55 0.01 15.75 0.02 900.58 0.02 7.00 0.01 900.56 0.01 16.00 0.02 900.58 0.02 7.25 0.01 900.56 0.01 16.25 0.02 900.58 0.02 7.50 0.01 900.56 0.01 16.50 0.02 900.58 0.02 7.75 0.01 900.56 0.01 16.75 0.01 900.57 0.01 8.00 0.01 900.56 0.01 17.00 0.01 900.57 0.01 8.25 0.01 900.57 0.01 17.25 0.01 900.57 0.01 8.50 0.02 900.57 0.02 17.50 0.01 900.57 0.01 8.75 0.02 900.57 0.02 17.75 0.01 900.57 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 230 Summary for Pond RCVR 4: RCVR 4 Inflow Area = 0.080 ac, 87.50% Impervious, Inflow Depth > 4.78" for 100-yr event Inflow = 0.53 cfs @ 12.04 hrs, Volume= 0.032 af Outflow = 0.53 cfs @ 12.04 hrs, Volume= 0.032 af, Atten= 0%, Lag= 0.0 min Primary = 0.53 cfs @ 12.04 hrs, Volume= 0.032 af Routed to Pond RCVR 5 : RCVR 5 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.97' @ 12.56 hrs Device Routing Invert Outlet Devices #1 Primary 901.13' 8.0" Round RCVR 4 to RCVR 5 L= 22.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 901.13' / 901.04' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.55 cfs @ 12.04 hrs HW=901.89' TW=901.77' (Dynamic Tailwater) 1=RCVR 4 to RCVR 5 (Outlet Controls 0.55 cfs @ 1.75 fps) Pond RCVR 4: RCVR 4 RCVR 4 to RCVR 5

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 231 Pond RCVR 4: RCVR 4 Hydrograph Inflow 0.53 cfs Primary 0.53 cfs 0.55 Inflow Area=0.080 ac 0.5 Peak Elev=901.97' 0.45 0.4 8.0" 0.35 Round Culvert Flow (cfs) 0.3 n=0.013 0.25 L=22.0' 0.2 S=0.0041 '/' 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 232 Pond RCVR 4: RCVR 4 Stage-Discharge 901.95 Primary 901.9 901.85 901.8 901.75 901.7 901.65 Elevation (feet) 901.6 901.55 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 RCVR 4 to RCVR 5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 233 Pond RCVR 4: RCVR 4 Stage-Area-Storage 901.95 Storage 901.9 901.85 901.8 901.75 901.7 901.65 Elevation (feet) 901.6 901.55 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 234 Hydrograph for Pond RCVR 4: RCVR 4 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 901.13 0.00 9.00 0.01 901.20 0.01 18.00 0.01 901.19 0.01 0.25 0.00 901.13 0.00 9.25 0.01 901.21 0.01 18.25 0.01 901.19 0.01 0.50 0.00 901.13 0.00 9.50 0.01 901.21 0.01 18.50 0.01 901.19 0.01 0.75 0.00 901.13 0.00 9.75 0.01 901.21 0.01 18.75 0.01 901.19 0.01 1.00 0.00 901.13 0.00 10.00 0.01 901.22 0.01 19.00 0.01 901.19 0.01 1.25 0.00 901.13 0.00 10.25 0.01 901.22 0.01 19.25 0.01 901.19 0.01 1.50 0.00 901.13 0.00 10.50 0.02 901.23 0.02 19.50 0.01 901.19 0.01 1.75 0.00 901.13 0.00 10.75 0.02 901.24 0.02 19.75 0.01 901.19 0.01 2.00 0.00 901.14 0.00 11.00 0.02 901.25 0.02 20.00 0.01 901.19 0.01 2.25 0.00 901.15 0.00 11.25 0.03 901.26 0.03 20.25 0.01 901.18 0.01 2.50 0.00 901.15 0.00 11.50 0.04 901.29 0.04 20.50 0.00 901.18 0.00 2.75 0.00 901.15 0.00 11.75 0.13 901.44 0.13 20.75 0.00 901.18 0.00 3.00 0.00 901.16 0.00 12.00 0.46 901.76 0.46 21.00 0.00 901.18 0.00 3.25 0.00 901.16 0.00 12.25 0.20 901.81 0.20 21.25 0.00 901.18 0.00 3.50 0.00 901.16 0.00 12.50 0.12 901.91 0.12 21.50 0.00 901.18 0.00 3.75 0.00 901.16 0.00 12.75 0.04 901.90 0.04 21.75 0.00 901.18 0.00 4.00 0.00 901.17 0.00 13.00 0.03 901.64 0.03 22.00 0.00 901.18 0.00 4.25 0.00 901.17 0.00 13.25 0.02 901.40 0.02 22.25 0.00 901.18 0.00 4.50 0.00 901.17 0.00 13.50 0.02 901.26 0.02 22.50 0.00 901.18 0.00 4.75 0.00 901.17 0.00 13.75 0.02 901.24 0.02 22.75 0.00 901.18 0.00 5.00 0.00 901.17 0.00 14.00 0.02 901.23 0.02 23.00 0.00 901.18 0.00 5.25 0.00 901.17 0.00 14.25 0.01 901.22 0.01 23.25 0.00 901.18 0.00 5.50 0.00 901.18 0.00 14.50 0.01 901.22 0.01 23.50 0.00 901.18 0.00 5.75 0.00 901.18 0.00 14.75 0.01 901.22 0.01 23.75 0.00 901.18 0.00 6.00 0.00 901.18 0.00 15.00 0.01 901.21 0.01 24.00 0.00 901.18 0.00 6.25 0.00 901.18 0.00 15.25 0.01 901.21 0.01 6.50 0.00 901.18 0.00 15.50 0.01 901.21 0.01 6.75 0.00 901.18 0.00 15.75 0.01 901.21 0.01 7.00 0.01 901.19 0.01 16.00 0.01 901.20 0.01 7.25 0.01 901.19 0.01 16.25 0.01 901.20 0.01 7.50 0.01 901.19 0.01 16.50 0.01 901.20 0.01 7.75 0.01 901.19 0.01 16.75 0.01 901.20 0.01 8.00 0.01 901.19 0.01 17.00 0.01 901.20 0.01 8.25 0.01 901.20 0.01 17.25 0.01 901.20 0.01 8.50 0.01 901.20 0.01 17.50 0.01 901.19 0.01 8.75 0.01 901.20 0.01 17.75 0.01 901.19 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 235 Summary for Pond RCVR 5: RCVR 5 Inflow Area = 0.130 ac, 92.31% Impervious, Inflow Depth > 4.87" for 100-yr event Inflow = 0.84 cfs @ 12.01 hrs, Volume= 0.053 af Outflow = 0.84 cfs @ 12.01 hrs, Volume= 0.053 af, Atten= 0%, Lag= 0.0 min Primary = 0.84 cfs @ 12.01 hrs, Volume= 0.053 af Routed to Pond SWALE : SWALE Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.96' @ 12.51 hrs Device Routing Invert Outlet Devices #1 Primary 901.04' 8.0" Round RCVR 5 to SWALE L= 89.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 901.04' / 900.68' S= 0.0040 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.76 cfs @ 12.01 hrs HW=901.80' TW=901.33' (Dynamic Tailwater) 1=RCVR 5 to SWALE (Outlet Controls 0.76 cfs @ 2.41 fps) Pond RCVR 5: RCVR 5 RCVR 5 to SWALE

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 236 Pond RCVR 5: RCVR 5 Hydrograph Inflow 0.84 cfs Primary 0.9 0.84 cfs 0.85 Inflow Area=0.130 ac 0.8 0.75 Peak Elev=901.96' 0.7 0.65 8.0" 0.6 0.55 Round Culvert Flow (cfs) 0.5 0.45 n=0.013 0.4 L=89.0' 0.35 0.3 S=0.0040 '/' 0.25 0.2 0.15 0.1 0.05 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 237 Pond RCVR 5: RCVR 5 Stage-Discharge 901.95 Primary 901.9 901.85 901.8 901.75 901.7 901.65 Elevation (feet) 901.6 901.55 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 901.1 RCVR 5 to SWALE 901.05 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 238 Pond RCVR 5: RCVR 5 Stage-Area-Storage 901.95 Storage 901.9 901.85 901.8 901.75 901.7 901.65 Elevation (feet) 901.6 901.55 901.5 901.45 901.4 901.35 901.3 901.25 901.2 901.15 901.1 901.05 0 Storage (acre-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 239 Hydrograph for Pond RCVR 5: RCVR 5 Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 901.04 0.00 9.00 0.02 901.13 0.02 18.00 0.01 901.12 0.01 0.25 0.00 901.04 0.00 9.25 0.02 901.13 0.02 18.25 0.01 901.11 0.01 0.50 0.00 901.04 0.00 9.50 0.02 901.13 0.02 18.50 0.01 901.11 0.01 0.75 0.00 901.04 0.00 9.75 0.02 901.14 0.02 18.75 0.01 901.11 0.01 1.00 0.00 901.05 0.00 10.00 0.02 901.14 0.02 19.00 0.01 901.11 0.01 1.25 0.00 901.06 0.00 10.25 0.02 901.15 0.02 19.25 0.01 901.11 0.01 1.50 0.00 901.06 0.00 10.50 0.03 901.16 0.03 19.50 0.01 901.11 0.01 1.75 0.00 901.06 0.00 10.75 0.03 901.16 0.03 19.75 0.01 901.11 0.01 2.00 0.00 901.07 0.00 11.00 0.04 901.18 0.04 20.00 0.01 901.11 0.01 2.25 0.00 901.07 0.00 11.25 0.05 901.19 0.05 20.25 0.01 901.11 0.01 2.50 0.00 901.07 0.00 11.50 0.07 901.22 0.07 20.50 0.01 901.11 0.01 2.75 0.00 901.08 0.00 11.75 0.24 901.38 0.24 20.75 0.01 901.11 0.01 3.00 0.00 901.08 0.00 12.00 0.83 901.81 0.83 21.00 0.01 901.10 0.01 3.25 0.00 901.08 0.00 12.25 0.29 901.80 0.29 21.25 0.01 901.10 0.01 3.50 0.00 901.08 0.00 12.50 0.19 901.96 0.19 21.50 0.01 901.10 0.01 3.75 0.00 901.09 0.00 12.75 0.06 901.86 0.06 21.75 0.01 901.10 0.01 4.00 0.00 901.09 0.00 13.00 0.04 901.59 0.04 22.00 0.01 901.10 0.01 4.25 0.00 901.09 0.00 13.25 0.04 901.34 0.04 22.25 0.01 901.10 0.01 4.50 0.01 901.09 0.01 13.50 0.03 901.21 0.03 22.50 0.01 901.10 0.01 4.75 0.01 901.09 0.01 13.75 0.03 901.18 0.03 22.75 0.01 901.10 0.01 5.00 0.01 901.09 0.01 14.00 0.03 901.17 0.03 23.00 0.01 901.10 0.01 5.25 0.01 901.10 0.01 14.25 0.02 901.16 0.02 23.25 0.01 901.10 0.01 5.50 0.01 901.10 0.01 14.50 0.02 901.15 0.02 23.50 0.01 901.10 0.01 5.75 0.01 901.10 0.01 14.75 0.02 901.14 0.02 23.75 0.01 901.10 0.01 6.00 0.01 901.10 0.01 15.00 0.02 901.14 0.02 24.00 0.01 901.10 0.01 6.25 0.01 901.10 0.01 15.25 0.02 901.14 0.02 6.50 0.01 901.10 0.01 15.50 0.02 901.13 0.02 6.75 0.01 901.11 0.01 15.75 0.02 901.13 0.02 7.00 0.01 901.11 0.01 16.00 0.01 901.13 0.01 7.25 0.01 901.11 0.01 16.25 0.01 901.13 0.01 7.50 0.01 901.11 0.01 16.50 0.01 901.12 0.01 7.75 0.01 901.11 0.01 16.75 0.01 901.12 0.01 8.00 0.01 901.12 0.01 17.00 0.01 901.12 0.01 8.25 0.01 901.12 0.01 17.25 0.01 901.12 0.01 8.50 0.01 901.12 0.01 17.50 0.01 901.12 0.01 8.75 0.01 901.12 0.01 17.75 0.01 901.12 0.01

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 240 Summary for Pond SWALE: SWALE Inflow Area = 0.280 ac, 64.29% Impervious, Inflow Depth > 4.29" for 100-yr event Inflow = 1.15 cfs @ 12.05 hrs, Volume= 0.100 af Outflow = 1.27 cfs @ 12.50 hrs, Volume= 0.089 af, Atten= 0%, Lag= 26.8 min Primary = 1.27 cfs @ 12.50 hrs, Volume= 0.089 af Routed to Pond RCVR 1 : RCVR 1 Routing by Dyn-Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Peak Elev= 901.93' @ 12.60 hrs Surf.Area= 1,688 sf Storage= 1,986 cf Plug-Flow detention time= 116.0 min calculated for 0.089 af (89% of inflow) Center-of-Mass det. time= 64.2 min ( 839.0 - 774.8 ) Volume Invert Avail.Storage Storage Description #1 900.00' 2,104 cf Custom Stage Data (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 900.00 396 0 0 901.00 1,038 717 717 902.00 1,736 1,387 2,104 Device Routing Invert Outlet Devices #1 Primary 900.68' 8.0" Round 8" HDPE L= 32.0' CPP, mitered to conform to fill, Ke= 0.700 Inlet / Outlet Invert= 900.68' / 900.55' S= 0.0041 '/' Cc= 0.900 n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.35 sf Primary OutFlow Max=0.00 cfs @ 12.50 hrs HW=901.92' TW=902.07' (Dynamic Tailwater) 1=8" HDPE ( Controls 0.00 cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 241 Pond SWALE: SWALE 8" HDPE Pond SWALE: SWALE Hydrograph Inflow Primary 1.27 cfs Inflow Area=0.280 ac 1.15 cfs Peak Elev=901.93' 1 Storage=1,986 cf 8.0" Flow (cfs) Round Culvert n=0.013 L=32.0' S=0.0041 '/' 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 242 Pond SWALE: SWALE Stage-Discharge 902 Primary Elevation (feet) 901 8" HDPE Initial Tailwater 900 0 1 Discharge (cfs)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 243 Pond SWALE: SWALE Stage-Area-Storage Surface/Horizontal/Wetted Area (sq-ft) 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 1,700 Surface Storage 902 Elevation (feet) 901 Custom Stage Data 900 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 Storage (cubic-feet)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 244 Hydrograph for Pond SWALE: SWALE Time Inflow Storage Elevation Primary Time Inflow Storage Elevation Primary (hours) (cfs) (cubic-feet) (feet) (cfs) (hours) (cfs) (cubic-feet) (feet) (cfs) 0.00 0.00 0 900.00 0.00 18.00 0.02 520 900.80 0.02 0.50 0.00 0 900.00 0.00 18.50 0.02 516 900.79 0.02 1.00 0.00 0 900.00 0.00 19.00 0.02 513 900.79 0.02 1.50 0.00 1 900.00 0.00 19.50 0.02 510 900.79 0.02 2.00 0.00 2 900.01 0.00 20.00 0.02 507 900.78 0.02 2.50 0.00 5 900.01 0.00 20.50 0.02 505 900.78 0.02 3.00 0.00 10 900.02 0.00 21.00 0.02 503 900.78 0.02 3.50 0.00 16 900.04 0.00 21.50 0.02 501 900.78 0.02 4.00 0.00 23 900.06 0.00 22.00 0.01 499 900.77 0.02 4.50 0.01 32 900.08 0.00 22.50 0.01 497 900.77 0.02 5.00 0.01 41 900.10 0.00 23.00 0.01 495 900.77 0.01 5.50 0.01 53 900.12 0.00 23.50 0.01 494 900.77 0.01 6.00 0.01 66 900.15 0.00 24.00 0.01 493 900.77 0.01 6.50 0.01 82 900.18 0.00 7.00 0.01 101 900.22 0.00 7.50 0.01 123 900.26 0.00 8.00 0.02 149 900.30 0.00 8.50 0.02 180 900.35 0.00 9.00 0.02 216 900.41 0.00 9.50 0.03 260 900.47 0.00 10.00 0.03 314 900.55 0.00 10.50 0.04 384 900.64 0.00 11.00 0.06 475 900.75 0.01 11.50 0.11 575 900.86 0.05 12.00 1.14 1,073 901.31 0.19 12.50 0.46 1,960 901.92 1.27 13.00 0.10 1,371 901.53 0.91 13.50 0.07 805 901.08 0.23 14.00 0.05 643 900.93 0.10 14.50 0.05 590 900.87 0.06 15.00 0.04 566 900.85 0.05 15.50 0.03 552 900.83 0.04 16.00 0.03 542 900.82 0.04 16.50 0.03 535 900.81 0.03 17.00 0.03 529 900.81 0.03 17.50 0.02 524 900.80 0.03

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 245 Summary for Link POST: Post Development Inflow Area = 0.690 ac, 56.52% Impervious, Inflow Depth > 3.97" for 100-yr event Inflow = 2.11 cfs @ 12.35 hrs, Volume= 0.228 af Primary = 2.11 cfs @ 12.35 hrs, Volume= 0.228 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs Link POST: Post Development Hydrograph Inflow 2.11 cfs Primary 2.11 cfs Inflow Area=0.690 ac 2 Flow (cfs) 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Time (hours)

WNY-2500056.00_HydroCAD extreme_precip_tables_output (29) 24-hr S1 100-yr Rainfall=5.25" Prepared by Greenman-Pedersen, Inc Printed 12/18/2025 HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC Page 246 Hydrograph for Link POST: Post Development Time Inflow Elevation Primary Time Inflow Elevation Primary Time Inflow Elevation Primary (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) (hours) (cfs) (feet) (cfs) 0.00 0.00 0.00 0.00 9.00 0.03 0.00 0.03 18.00 0.06 0.00 0.06 0.25 0.00 0.00 0.00 9.25 0.03 0.00 0.03 18.25 0.05 0.00 0.05 0.50 0.00 0.00 0.00 9.50 0.04 0.00 0.04 18.50 0.05 0.00 0.05 0.75 0.00 0.00 0.00 9.75 0.04 0.00 0.04 18.75 0.05 0.00 0.05 1.00 0.00 0.00 0.00 10.00 0.04 0.00 0.04 19.00 0.05 0.00 0.05 1.25 0.00 0.00 0.00 10.25 0.05 0.00 0.05 19.25 0.05 0.00 0.05 1.50 0.00 0.00 0.00 10.50 0.06 0.00 0.06 19.50 0.05 0.00 0.05 1.75 0.00 0.00 0.00 10.75 0.07 0.00 0.07 19.75 0.05 0.00 0.05 2.00 0.00 0.00 0.00 11.00 0.09 0.00 0.09 20.00 0.04 0.00 0.04 2.25 0.00 0.00 0.00 11.25 0.13 0.00 0.13 20.25 0.04 0.00 0.04 2.50 0.00 0.00 0.00 11.50 0.19 0.00 0.19 20.50 0.04 0.00 0.04 2.75 0.01 0.00 0.01 11.75 0.57 0.00 0.57 20.75 0.04 0.00 0.04 3.00 0.01 0.00 0.01 12.00 1.61 0.00 1.61 21.00 0.04 0.00 0.04 3.25 0.01 0.00 0.01 12.25 0.94 0.00 0.94 21.25 0.04 0.00 0.04 3.50 0.01 0.00 0.01 12.50 2.03 0.00 2.03 21.50 0.04 0.00 0.04 3.75 0.01 0.00 0.01 12.75 1.14 0.00 1.14 21.75 0.04 0.00 0.04 4.00 0.01 0.00 0.01 13.00 1.14 0.00 1.14 22.00 0.04 0.00 0.04 4.25 0.01 0.00 0.01 13.25 0.50 0.00 0.50 22.25 0.04 0.00 0.04 4.50 0.01 0.00 0.01 13.50 0.35 0.00 0.35 22.50 0.04 0.00 0.04 4.75 0.01 0.00 0.01 13.75 0.24 0.00 0.24 22.75 0.03 0.00 0.03 5.00 0.01 0.00 0.01 14.00 0.18 0.00 0.18 23.00 0.03 0.00 0.03 5.25 0.01 0.00 0.01 14.25 0.15 0.00 0.15 23.25 0.03 0.00 0.03 5.50 0.01 0.00 0.01 14.50 0.13 0.00 0.13 23.50 0.03 0.00 0.03 5.75 0.01 0.00 0.01 14.75 0.12 0.00 0.12 23.75 0.03 0.00 0.03 6.00 0.01 0.00 0.01 15.00 0.11 0.00 0.11 24.00 0.03 0.00 0.03 6.25 0.01 0.00 0.01 15.25 0.10 0.00 0.10 6.50 0.02 0.00 0.02 15.50 0.09 0.00 0.09 6.75 0.02 0.00 0.02 15.75 0.08 0.00 0.08 7.00 0.02 0.00 0.02 16.00 0.08 0.00 0.08 7.25 0.02 0.00 0.02 16.25 0.08 0.00 0.08 7.50 0.02 0.00 0.02 16.50 0.07 0.00 0.07 7.75 0.02 0.00 0.02 16.75 0.07 0.00 0.07 8.00 0.02 0.00 0.02 17.00 0.07 0.00 0.07 8.25 0.02 0.00 0.02 17.25 0.06 0.00 0.06 8.50 0.02 0.00 0.02 17.50 0.06 0.00 0.06 8.75 0.03 0.00 0.03 17.75 0.06 0.00 0.06

EXIST I. PIPE x ST x Engineering Design Planning 903 WV W Construction Management SSx 904 UP (716) 633-4844 GPINET.COM WATER ST x Greenman - Pedersen, Inc. CHE(PRIVATE 2 METER 90 4950 Genesee Street, Suite 100 90 RCVR 5 RIM 901.57 ST MH PIT W Buffalo, NY, 14225 RIM 903.63 WV W SSx 30"OAK WV VAL ROAD) W INV 897.53-12" ST x SSx S INV 898.45-12" WV S INV 899.12-12" N INV 899.15-12" RCVR E INV 897.48-18" G RIM 903.79 RO N 90 2 GLM W INV 897.53-18" PREPARED FOR RIM 901.54 E INV 899.19-12" CB WV W 902 SSx SPEED ST x PCW Enterprises, LLC AD LIMIT W SIGN S 4185 East Blood Road S WV CB S S SAN MH RIM 902.29 Cowlesville, NY 14037 90 D 903.62 90 4 W INV 894.07-8" ST x 5 14"SPRUCE STOP 2 E INV 893.97-8" SIGN 90 N INV 894.09-8" CB RCVR. AS ST x 2" G 22"OAK RIM 902.30 N INV 899.15 ST x 902 903 30"OAK 5 ST x RCVR. 90 MILE MARKER 903 RIM902.41 20A W INV 898.69-12" ST x 4"CHERRY 0 20' 40' STONE 5301 E INV 898.61-12" 1091 A LK DRIVEWAY 904 SIDEW SCALE IN FEET ST x CB 903 NC. 901 GLM CO 20" 10 " UP 20"x20"x12" S D.I. 2"CHERRY T. C 3 TEES ST x P. 90 D.I. 902 P. 5 ST x ASI 90 12" NG DR X BO M WV W AIL 4"CHERRY IVE AS 4 M SPEED 2" G 90 ST x LIMIT BFV WA W ST MH x WV SIGN W WV ST PEDESTRIAN W Y RIM 905.01 CROSSING 4"CHERRY WATER 2 S INV 898.94-12" W WV W 90 BFV METER PIT W INV 898.26-18" UP E INV 898.19-18" D 905.02 ST x 903 W 906 RCVR 20A 12"x12"x12" TEE 905 904 CB RCVR O UTE O AD RIM903.35 W INV 899.23-12" -5) 4"CHERRY AS R RES) (SP RIM 903.00 ST x NY SR E INV 899.23-12" CP 8" G 12"x8" KEH VARI SUMP 899.40 C REDUCERS 0" P WEST LINE OF THE VILLAGE OF EAST AURORA PLUGGED A T 2 UP QU (WID CB C/E Town of Aurora, NY 14052 EAST LINE OF THE TOWN OF AURORA 359 QUAKER ROAD MEDICAL OFFICES FAR NE ASPHALT 904 3 904 90 4 ST x 90 DRIVEWAY LA GLM C/E RIE S YD DRAIN 2" GA RIM 902.70 3 90 R ST x 359 Quaker Road ALK 4"MAPLE OX EW C/E MA IL B N C. SID M C O UP 904 AS ST x 8" G 3 RCVR 4"MAPLE 90 RIM 903.78 EXIST REBAR C/E PROPOSED 20' WIDE ONLINE, 1.7'W E INV 899.60 CB PRIVATE UTILITY EASEMENT 12" HDPE PL C/E YD DRAIN PL RIM 902.74 20" 8" D 4 72 4"MAPLE 32"MAPLE 90 PL ST. .I.P LF ALK 904 -0.5 DEW CAS . SI NC. 8" H CO ING 6"MAPLE PL % -5) UP SP UP ( 8 DP CP 3 904 PC 90 905 M ' D& HP 904.3± 20" .83 E 5 WATERLINE 149 PL W 9 @ -2. PAINT MARKS AS 04 PL 6"MAPLE 8" G % RCVR.93% 90 ASPHALT 1.0 5% W WV ASPHALT 0.40 -0903.65 4. PARKING RIM 5 LOT 0% PARKING@ LOT UP GLM .5 3.5 D PE INV 900.48 902 90 H 903 GV G EXIST REBAR 8" .0% 903 F ONLINE, 0.1'E 2 -0 'D L - 904 39 %HP 90 .2 200 % -2.6%SD 0.7 2 4.2± 'M -0. N:\2025\WNY-2500056.00 359 QUAKER ROAD SITE PLAN\Design\Engineering\Drainage\WNY-2500056.00_Hydrology.dwg Thursday, 18 December 2025 4:16PM % -RCVR .40 P1L98.45 0 90 PL 9% E @ RIM 904.11 5 DA 3 -1.0 H DP INV 900.32 WARNING: ALTERATIONS TO THIS 6 8" % 0.15± ACRES 4" INV 903.47 DOCUMENT NOT CONFORMING TO -1.0 LF -1.0 DA 2 SECTION 7209, SUBDIVISION 2, % 59 BAC K VC STATE EDUCATION LAW, ARE PROHIBITED DS ET 0.01± ACRES . 3 %"P 1 % - 4 DA 1 YAR -1.0 NT RCVR 1 ' F RO 0.06± ACRES B REVISIONS 32 @ 0 50 B % RIM 903.51 7 LF .40% .5± DATE INV 900.56 04 % VC -1.6 .5 L. 9 4" INV 903.17 4" P PL B 8" PL904 902 % F. E -1.1 -0.2 F. 90 903 HD .5 903 5 B 40' % PE SID HP 904.1± 904 E 40' YAR 8" HDPE SID INV 900.68 -2.0 D E SET 903 % -0.8 YAR 904 % PL BAC DS PL 359 QUAKER ROAD K REVISION 900 ETB 904 903 90 OF B .5%DA 4 (NOW OR FORMERLY) 2 ASPHALT ACK -20.08± E PARKING LIN RLY JR. PBI HOLDINGS OF WNY LLC ACRES .5% THE A. D 93 LOT B -0 YE NOR RGE P.-3 902 PRO L.-11283, P.-427 CK P E E TBA HD T AREA=0.69± ACRE E AS , " NO. S GE 7192 DA 5 8 POS RD A R YA 2 LF .40% 0.05± ACRES 2 @0 RCVR 4 O E L.- 0' R ED S 6 PL RIM 903.24 October 2025 .5% PL 90 901 INV-0 901.13 % WAL 902 DRAWN/DESIGN BY CHECKED BY 3 DA 6 .5 -1.0 RCVR 5 JS JB .5 0.16± ACRES % .0% E 0 UP 200 .33' D 1 3 D 0.4 RIM 903.54 - 902 .09' @ .3% 204 904 DPE INV-0901.04 .5 "H 903 AR EB 4'E .5 903 LF 8 3 T R E, 0. M I S EX LIN .42' PL 9 PL ON 2.5 8 902 203 .5 90 903 903 Drainage Inlet 903 902 Drainage Areas PL 8" HDPE 90 0' D 3 15 INV 900.68 REVIEW SET NOT ISSUED FOR .0 0' M PL 150 CONSTRUCTION PL SCALE: 1" = 20' PL WNY-2500056.00 SET REBAR 902 01 of 01 901

DRAINAGE COMPUTATIONS TRIBUTARY RUNOFF TIME OF REQUIRED DESIGN EXISTING SEWER LOCATION PROFILE AREA COEFFICIENT CONCENTRATION CAPACITY n= 0.012 CAPACITY A ΣA IN CHANNEL Tc i q D V Qfull LENGTH s Q % DRAINAGE AREAS FROM TO C CA ΣCA Drop Invert Rim Cover (ac) (ac) (sec) (min) (min) (in/hr) (cfs) (in) (fps) (cfs) (ft) (%) (cfs) REQ'D DA 4 RCVR 4 RCVR 5 0.08 0.08 0.80 0.06 0.06 9.77 0.16 5.00 5.28 0.34 8 2.25 0.83 22 0.40% 0.09 901.13 903.24 1.45 DA 5 RCVR 5 Swale 0.05 0.13 0.80 0.04 0.10 35.19 0.59 5.16 5.22 0.54 8 2.53 0.83 89 0.40% 0.36 901.04 903.54 1.83 DA 6 Swale RCVR 1 0.16 0.29 0.60 0.10 0.20 12.11 0.20 15.00 3.36 0.67 8 2.64 0.83 32 0.40% 0.13 900.68 DA 1 RCVR 1 RCVR 2 0.06 0.35 0.80 0.05 0.25 21.82 0.36 15.20 3.34 0.83 8 2.70 0.83 59 0.40% 0.24 900.56 903.51 2.29 DA 3 RCVR 3 RCVR 2 0.15 0.15 0.80 0.12 0.12 14.92 0.25 5.00 5.28 0.63 8 2.61 0.83 39 0.40% 0.16 900.48 903.65 2.51 DA 2 RCVR 2 Ex RCVR 0.01 0.51 0.80 0.01 0.38 16.88 0.28 15.57 3.30 1.24 8 4.27 1.31 72 1.00% 0.72 900.32 904.11 3.12 LOCATION: 359 Quaker Road COMPUTED BY: JJS DATE: 12/18/25 SHEET 1 CHECKED BY: DATE: OF 1

APPENDIX B WATERLINE CALCULATIONS AND MODELS

359 QUAKER RD ´ 100 275 350 16 356 368 350 M16G36 4GS < 404 M16G36 2B e <! Pip ! 1 inch = 200 feet ! M16G35 1GS M M§ §![ 22 ri cal 44 ind Cyl D < R R oncr et e 436 AKE 20!<" C U Q M16G35 2GS M16G43A 1G M16G43A 2G !! 359 M16G43 1AR COM ) 270 M16F48 8" Poly-Vinyl Chloride % MER 12" M16G42 ! ! M16G42 2B! % 400 CE Poly-V ! M16G41 3G ' M16G41 4G M16G41 2B ! M16G41 1B ! ! WAY inyl ! RESIDUAL M16G41A 2G M16G41A 1G 408 ! ! %! M16G41 431 417 44 ! Chl % M16G41A M16G51 o 2 ride ! % ! FLOW Legend: 8" P 50 Parcels 4 oly -Vin 35 25 yl C hlo 6 69 ride M16G52 1B 120 8 ! %! M16G50 ! 83 M16G52 % ! 91 10 97 11 12 130

ARM Hydrant Flow Test Inquiry -- Hydrant: M16G42 Test Date/Time: 6/17/2019 11:35 CHI095-B Address: 431 QUAKER RD Side: S Location: 1ST E/O JEWETT HOLMWOOD RD AURORA Size of Main/Branch: 20"/6" Fire District: 24020 FIRE PROTECT DIST 1 Water District: 059 ECWA AREA-TOWN OF AURORA ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ Performed By: AMM Comments: HYDRANT FLOW TEST REQUESTED BY ERIC DANIEL, C&S COMPANIES PHONE: 847-1630; EMAIL: [email protected] ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ Dischrge Coef: .90 Elvtn Usgs(ft): Static(psi): 81 Residual(psi): 64 Required Residual Pressure(psi): 20 Gallons Used..: 3,330 Total Flow(gpm): 1,113 Flow at Reqd Resid Pressure: 2,219 Flow Hydrants: C Flow Hyd Flow Hydrant Address Main/Brnch Nzle Size Pitot Flow Comments M16 G41 OP 25 JEWETT HOLMWOOD 8"/6" 1: 2.50 44.0 1,113 1ST HYD SW/O QUAKER RD 2: 3: Tot Flow: 1,113 ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ Bottom I=Flow Hydrant Inquiry ENTER=Continue F3=Exit F6=Maintain Test F7=Test Hydrant Inquiry F15=Print Test Information

Calibration 359 Quaker Road - Time: 0.00 hours P-4 P -3 P-1 P-2 00 P-5 2 P- 1 P- WaterCAD WNY-2500056.00_WaterCAD Model.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.03.01.08] 12/22/2025 27 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA Page 1 of 6 +1-203-755-1666

Calibration Junction Table - Time: 0.00 hours Label Elevation Demand Hydraulic Grade Pressure (ft) (gpm) (ft) (psi) EX HYD 901.91 (N/A) (N/A) (N/A) Flow Hydrant M16G41 903.50 1,113 1,050.42 64 J-2 904.54 (N/A) (N/A) (N/A) J-3 903.24 (N/A) (N/A) (N/A) J-4 904.50 (N/A) (N/A) (N/A) Residual Hydrant M16G42 902.50 0 1,060.65 68 Pipe Table - Time: 0.00 hours Label Length (Scaled) Diameter Material Hazen-Williams Has User Defined Length (User (ft) (in) C Length? Defined) (ft) P-2 160 20.0 Concrete 100.0 True 758 P-3 277 20.0 Concrete 100.0 False 0 P-4 14 6.0 Ductile Iron 100.0 False 0 P-5 97 2.0 Copper 100.0 False 0 P-100 60 8.0 Ductile Iron 130.0 True 1,300 Reservoir Table - Time: 0.00 hours Label Elevation Flow (In net) Flow (Out net) Hydraulic Grade (ft) (gpm) (gpm) (ft) R-1 1,089.60 -1,113 1,113 1,089.60 WaterCAD WNY-2500056.00_WaterCAD Model.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.03.01.08] 12/22/2025 27 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA Page 2 of 6 +1-203-755-1666

Maximum Demand 359 Quaker Road - Time: 0.00 hours P-4 P -3 P-1 P-2 00 P-5 2 P- 1 P- WaterCAD WNY-2500056.00_WaterCAD Model.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.03.01.08] 12/22/2025 27 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA Page 3 of 6 +1-203-755-1666

Maximum Demand Junction Table - Time: 0.00 hours Label Elevation Demand Hydraulic Grade Pressure (ft) (gpm) (ft) (psi) EX HYD 901.91 0 1,089.53 81 Flow Hydrant M16G41 903.50 0 1,089.53 80 J-2 904.54 0 1,089.53 80 J-3 903.24 0 1,089.53 81 J-4 904.50 42 1,082.55 77 Residual Hydrant M16G42 902.50 0 1,089.53 81 Pipe Table - Time: 0.00 hours Label Length (Scaled) Diameter Material Hazen-Williams Has User Defined Length (User (ft) (in) C Length? Defined) (ft) P-2 160 20.0 Concrete 100.0 True 758 P-3 277 20.0 Concrete 100.0 False 0 P-4 14 6.0 Ductile Iron 100.0 False 0 P-5 97 2.0 Copper 100.0 False 0 P-100 60 8.0 Ductile Iron 130.0 True 1,300 Reservoir Table - Time: 0.00 hours Label Elevation Flow (In net) Flow (Out net) Hydraulic Grade (ft) (gpm) (gpm) (ft) R-1 1,089.60 -42 42 1,089.60 WaterCAD WNY-2500056.00_WaterCAD Model.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.03.01.08] 12/22/2025 27 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA Page 4 of 6 +1-203-755-1666

Max Demand with Fire Flow 359 Quaker Road - Time: 0.00 hours P-4 P -3 P-1 P-2 00 P-5 2 P- 1 P- WaterCAD WNY-2500056.00_WaterCAD Model.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.03.01.08] 12/22/2025 27 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA Page 5 of 6 +1-203-755-1666

Max Demand with Fire Flow Junction Table - Time: 0.00 hours Label Elevation Demand Hydraulic Grade Pressure (ft) (gpm) (ft) (psi) EX HYD 901.91 1,500 1,032.34 56 Flow Hydrant M16G41 903.50 0 1,036.64 58 J-2 904.54 0 1,036.06 57 J-3 903.24 0 1,035.86 57 J-4 904.50 42 1,029.08 54 Residual Hydrant M16G42 902.50 0 1,036.64 58 Pipe Table - Time: 0.00 hours Label Length (Scaled) Diameter Material Hazen-Williams Has User Defined Length (User (ft) (in) C Length? Defined) (ft) P-2 160 20.0 Concrete 100.0 True 758 P-3 277 20.0 Concrete 100.0 False 0 P-4 14 6.0 Ductile Iron 100.0 False 0 P-5 97 2.0 Copper 100.0 False 0 P-100 60 8.0 Ductile Iron 130.0 True 1,300 Reservoir Table - Time: 0.00 hours Label Elevation Flow (In net) Flow (Out net) Hydraulic Grade (ft) (gpm) (gpm) (ft) R-1 1,089.60 -1,542 1,542 1,089.60 WaterCAD WNY-2500056.00_WaterCAD Model.wtg Bentley Systems, Inc. Haestad Methods Solution Center [10.03.01.08] 12/22/2025 27 Siemon Company Drive Suite 200 W Watertown, CT 06795 USA Page 6 of 6 +1-203-755-1666

359 QUAKER ROAD - DENTAL OFFICE DETERMINE PEAK INSTANTANEOUS WATER DEMAND TO BE USED IN SIZING THE PROPOSED WATER SERVICE TO THE DENTAL OFFICE (Information based on 2025 Plumbing Code of NYS & 2025 Residential Code of NYS) Type and Number of Fixtures Private Water Service Dental Clothes Location Lavatory Closet Sink Chair Washer Dental Chairs 7 Staff Lounge 1 Restroom 4 4 Laboratory 1 Sterilization 1 Laundry 1 Total Fixture Count by Type = 4 4 3 7 1 Water Demand, gpm/fixture type = 0.8 3 3 1.5 4 Water Demand, gpm = 3.2 12 9 10.5 4 Total Peak Water Demand, gpm = 38.7 Check Total Water Demand Based on Water Supply Fixture Unit Loads Water Supply Fixture Unit Load (w.s.f.u.) = 0.7 2.2 1.4 2 1.4 WSUL for all Fixtures = 2.8 8.8 4.2 14 1.4 = 31.2 w.s.f.u. Total Peak Water Demand, gpm = 24 (System with Predominantly Flush Tanks) Total Peak Water Demand, gpm = 42 (System with Predominantly Flush Valves) Total Peak Water Demand, gpm = 42 <--- Use This To Size The Proposed Water Service To The Dental Office Building Note: Calculations are based on Concept Floor Plan, prepared by SUTTON ARCHITECTURE BY: J. SOBOL - GREENMAN-PEDERSEN, INC. DATE: 12/22/2025

EXHIBITS

EXHIBIT 1 PROJECT SITE LOCATION MAP

Erie County On-Line Mapping Application Legend Parcels 0 0.07 0.1 Miles This map is a user generated static output from ERIE COUNTY an Internet mapping site and is for reference only. WGS_1984_Web_Mercator_Auxiliary_Sphere DEPARTMENT OF ENVIRONMENT & PLANNING Data layers that appear on this map may or may 1: 4,514 THIS MAP IS NOT TO BE USED FOR NAVIGATION OFFICE OF GIS not be accurate, current, or otherwise reliable.

EXHIBIT 2 NYSDEC ENVIRONMENTAL RESOURCE MAPPER

Project Site Location

EXHIBIT 3 FEMA Firmette

National Flood Hazard Layer FIRMette Legend 78°38'35"W 42°45'58"N SEE FIS REPORT FOR DETAILED LEGEND AND INDEX MAP FOR FIRM PANEL LAYOUT Without Base Flood Elevation (BFE) Zone A, V, A99 With BFE or Depth Zone AE, AO, AH, VE, AR SPECIAL FLOOD HAZARD AREAS Regulatory Floodway 0.2% Annual Chance Flood Hazard, Areas of 1% annual chance flood with average depth less than one foot or with drainage areas of less than one square mile Zone X Future Conditions 1% Annual Chance Flood Hazard Zone X Area with Reduced Flood Risk due to OTHER AREAS OF Levee. See Notes. Zone X FLOOD HAZARD Area with Flood Risk due to Levee Zone D NO SCREEN Area of Minimal Flood Hazard Zone X Effective LOMRs OTHER AREAS Area of Undetermined Flood Hazard Zone D GENERAL Channel, Culvert, or Storm Sewer STRUCTURES Levee, Dike, or Floodwall 20.2 B Cross Sections with 1% Annual Chance 17.5 Water Surface Elevation 8 Coastal Transect Base Flood Elevation Line (BFE) Limit of Study Jurisdiction Boundary Coastal Transect Baseline OTHER Profile Baseline FEATURES Hydrographic Feature Digital Data Available MAP PANELS No Digital Data Available Unmapped Ü The pin displayed on the map is an approximate point selected by the user and does not represent an authoritative property location. This map complies with FEMA's standards for the use of digital flood maps if it is not void as described below. The basemap shown complies with FEMA's basemap accuracy standards The flood hazard information is derived directly from the authoritative NFHL web services provided by FEMA. This map was exported on 9/29/2025 at 2:24 PM and does not reflect changes or amendments subsequent to this date and time. The NFHL and effective information may change or become superseded by new data over time. This map image is void if the one or more of the following map elements do not appear: basemap imagery, flood zone labels, legend, scale bar, map creation date, community identifiers, FIRM panel number, and FIRM effective date. Map images for 78°37'58"W 42°45'32"N Feet 1:6,000 unmapped and unmodernized areas cannot be used for 0 250 500 1,000 1,500 2,000 regulatory purposes. Basemap Imagery Source: USGS National Map 2023

EXHIBIT 4 SITE SOIL MAP

Hydrologic Soil Group—Erie County, New York 78° 38' 18'' W 78° 38' 15'' W 693240 693250 693260 693270 693280 693290 693300 42° 45' 46'' N 42° 45' 46'' N 4737180 4737180 4737170 4737170 4737160 4737160 4737150 4737150 4737140 4737140 4737130 4737130 4737120 4737120 4737110 4737110 4737100 4737100 4737090 Soil Map may not be valid at this scale. 4737090 42° 45' 43'' N 42° 45' 43'' N 693240 693250 693260 693270 693280 693290 693300 78° 38' 18'' W 78° 38' 15'' W Map Scale: 1:480 if printed on A portrait (8.5" x 11") sheet. Meters N 0 5 10 20 30 Feet 0 20 40 80 120 Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 17N WGS84 Natural Resources Web Soil Survey 9/29/2025 Conservation Service National Cooperative Soil Survey Page 1 of 4

Hydrologic Soil Group—Erie County, New York MAP LEGEND MAP INFORMATION Area of Interest (AOI) C The soil surveys that comprise your AOI were mapped at Area of Interest (AOI) 1:15,800. C/D Soils Warning: Soil Map may not be valid at this scale. D Soil Rating Polygons Not rated or not available Enlargement of maps beyond the scale of mapping can cause A misunderstanding of the detail of mapping and accuracy of soil A/D Water Features line placement. The maps do not show the small areas of Streams and Canals contrasting soils that could have been shown at a more detailed B scale. Transportation B/D Rails Please rely on the bar scale on each map sheet for map C measurements. Interstate Highways C/D Source of Map: Natural Resources Conservation Service US Routes D Web Soil Survey URL: Major Roads Coordinate System: Web Mercator (EPSG:3857) Not rated or not available Local Roads Maps from the Web Soil Survey are based on the Web Mercator Soil Rating Lines projection, which preserves direction and shape but distorts Background A distance and area. A projection that preserves area, such as the Aerial Photography Albers equal-area conic projection, should be used if more A/D accurate calculations of distance or area are required. B This product is generated from the USDA-NRCS certified data as B/D of the version date(s) listed below. C Soil Survey Area: Erie County, New York Survey Area Data: Version 24, Aug 25, 2024 C/D Soil map units are labeled (as space allows) for map scales D 1:50,000 or larger. Not rated or not available Date(s) aerial images were photographed: May 13, 2023—May 27, 2023 Soil Rating Points A The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background A/D imagery displayed on these maps. As a result, some minor B shifting of map unit boundaries may be evident. B/D Natural Resources Web Soil Survey 9/29/2025 Conservation Service National Cooperative Soil Survey Page 2 of 4

Hydrologic Soil Group—Erie County, New York Hydrologic Soil Group Map unit symbol Map unit name Rating Acres in AOI Percent of AOI Cc Canandaigua silt loam C/D 0.0 3.0% NfA Niagara silt loam, 0 to 3 C/D 0.7 97.0% percent slopes Totals for Area of Interest 0.7 100.0% Description Hydrologic soil groups are based on estimates of runoff potential. Soils are assigned to one of four groups according to the rate of water infiltration when the soils are not protected by vegetation, are thoroughly wet, and receive precipitation from long-duration storms. The soils in the United States are assigned to four groups (A, B, C, and D) and three dual classes (A/D, B/D, and C/D). The groups are defined as follows: Group A. Soils having a high infiltration rate (low runoff potential) when thoroughly wet. These consist mainly of deep, well drained to excessively drained sands or gravelly sands. These soils have a high rate of water transmission. Group B. Soils having a moderate infiltration rate when thoroughly wet. These consist chiefly of moderately deep or deep, moderately well drained or well drained soils that have moderately fine texture to moderately coarse texture. These soils have a moderate rate of water transmission. Group C. Soils having a slow infiltration rate when thoroughly wet. These consist chiefly of soils having a layer that impedes the downward movement of water or soils of moderately fine texture or fine texture. These soils have a slow rate of water transmission. Group D. Soils having a very slow infiltration rate (high runoff potential) when thoroughly wet. These consist chiefly of clays that have a high shrink-swell potential, soils that have a high water table, soils that have a claypan or clay layer at or near the surface, and soils that are shallow over nearly impervious material. These soils have a very slow rate of water transmission. If a soil is assigned to a dual hydrologic group (A/D, B/D, or C/D), the first letter is for drained areas and the second is for undrained areas. Only the soils that in their natural condition are in group D are assigned to dual classes. Rating Options Aggregation Method: Dominant Condition Natural Resources Web Soil Survey 9/29/2025 Conservation Service National Cooperative Soil Survey Page 3 of 4

Hydrologic Soil Group—Erie County, New York Component Percent Cutoff: None Specified Tie-break Rule: Higher Natural Resources Web Soil Survey 9/29/2025 Conservation Service National Cooperative Soil Survey Page 4 of 4

EXHIBIT 5 CULTURAL RESOURCE INFORMATION SYSTEM (CRIS) MAP

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