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CARMINA WOOD DESIGN Project No.: 23-4121 Date: 5/22/2026 80 Silo City Row, Suite 100 Project Name: Multifamily Development Buffalo, New York 14203 Project Address: 1425-1475 Orchard Park Road - West Seneca (716) 842-3165 Subject: Sanitary Sewer Demand Calcs FAX (716) 842-0263 Sheet: 1 of 1 Sanitary Sewage Demand Calculations: Proposed Townhomes 220 gal/d/unit x 29 units = 6,380 gpd *use 220 gallons per unit per day (2-bdrm) Find Peak Sanitary Demand: Peaking Factor based on Population: Total demand: 6,380 gpd / 51.96 gpcd = 123 per capita Population (P) = 123 people Peaking Factor : (18 +√P) / (4 + √P ) where P is in thousands Peaking Factor = 4.22 Peak Sanitary Demand = 6,380 x 4.22 = 26,911 gpd = 0.027 MGD = 0.042 cfs Required Infiltration and Inflow Mitigation: Mitigation Fee = $2.40 /gal = $15,312.00 Page 475 of 849