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West Seneca Sewer Report | Page 5 Entire Site: 110-gal/d/unit x 1bdrmx24 units=2,640 gpd + 110-gal/d/unit x 2bdrmx29 units=6,380 gpd +110-gal/d/unitx3bdrmx22 units=7,260 gpd 4 employees x 15 gpd=60 gpd Site total= 16,340 gpd Ave. Total = 16,340 gpd (0.017 MGD) Assume 2 people per bedroom. 2 x 148 bedrooms = 296 people + 4 office employees = 300 people. P = 0.300 (in thousands) Peaking Factor = (18 + √P) / (4+√P) = 4.08 Peak Sanitary Demand = 16,340 x 4.08 = 66,667 gpd 0.06667 MGD (0.10 CFS) Table 2: Dry Weather Peak Weekday Proposed Total Existing Peak Theoretical Ave. Daily Peak Available Capacity Node Sewer Peak Flow Sanitary Capacity Flow (mgd) Flow (Y/N) (mgd) Flow (mgd) (mgd) (mgd) 1-MH 48” RCP @ 0.41% BAA8A (Matthews 0.016 7.953* 0.067 8.020 59.6 Y Cemetery NW Corner) 2-MH 60” RCP @ 0.042% 0.016 11.619** 0.067 11.686 34.6 Y BAA9A (Casimer Street) 3-MH 66” RCP @ 0.026% BAAA8 0.016 10.614*** 0.067 10.614 35.1 Y (8 Cable Street) Notes: *Peak Dry Week Day for Nodes 1 on Aug 27,2024 **Peak Dry Week Day for Node 2 on Aug 21,2024 ***Peak Dry Week Day for Node 3 on Aug 21,2024 Table 3: Dry Weather Peak Weekend Day Proposed Total Ave. Daily Existing Peak Theoretical Peak Available Capacity Node Sewer Flow Peak Flow Sanitary Capacity Flow (Y/N) (mgd) (mgd) Flow (mgd) (mgd) (mgd) 1-MH 48” RCP @ 0.41% BAA8A (Matthews 0.016 6.070* 0.067 6.137 59.6 Y Cemetery NW Corner) Page 80 of 1493