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CARMINA WOOD DESIGN Project No.: 24-4113 Date: 7/13/2026 80 SILO CITY ROW, SUITE 100 Project Name: West Seneca Exchange BUFFALO, NEW YORK, 14203 Project Address: Orchard Park Road West Seneca, NY (716) 842-3165 Subject: Sanitary Sewer & Water Demand Calcs FAX (716) 842-0263 Sheet: 2 of 3 Sanitary Sewage Demand Calculations: Site 1 (Costco) 0.1 gal/d/sf x 158,000 sf = 15,800 gpd *use 0.1 gallons per sq. ft. per day (shopping center) Site 2 (Retail) 0.1 gal/d/sf x 83,000 sf = 8,300 gpd *use 0.1 gallons per sq. ft. per day (shopping center) Site 3 (Fast Food) 500 gal/d/wind. x 1 wind. = 500 gpd *use 500 gallons per drive thru window per day 25 gal/d/seat x 50 seats = 1,250 gpd *use 25 gallons per seat per day (fast food) Site 4 (Fast Food) 500 gal/d/wind. x 1 wind. = 500 gpd *use 500 gallons per drive thru window per day 25 gal/d/seat x 50 seats = 1,250 gpd *use 25 gallons per seat per day (fast food) Site 5 (Fast Food) 500 gal/d/wind. x 1 wind. = 500 gpd *use 500 gallons per drive thru window per day 25 gal/d/seat x 60 seats = 1,500 gpd *use 25 gallons per seat per day (fast food) Site 6 (Retail) 0.1 gal/d/sf x 2,925 sf = 293 gpd *use 0.1 gallons per sq. ft. per day (retail) Site 7 (Fast Food) 500 gal/d/wind. x 1 wind. = 500 gpd *use 500 gallons per drive thru window per day 25 gal/d/seat x 62 seats = 1,550 gpd *use 25 gallons per seat per day (fast food) Site 8 (Bank) 15 gal/d/Employee x 5 Employ. = 75 gpd *use 15 gallons per Employee per day Site 9 (Retail) 0.1 gal/d/sf x 9,100 sf = 910 gpd *use 0.1 gallons per sq. ft. per day (retail) Site 10 (Retail) 0.1 gal/d/sf x 22,000 sf = 2,200 gpd *use 0.1 gallons per sq. ft. per day (retail) Site 11 (Retail) 0.1 gal/d/sf x 22,000 sf = 2,200 gpd *use 0.1 gallons per sq. ft. per day (retail) Site 12 (Retail) 0.1 gal/d/sf x 22,000 sf = 2,200 gpd *use 0.1 gallons per sq. ft. per day (retail) Site 13 (Retail) 0.1 gal/d/sf x 22,000 sf = 2,200 gpd *use 0.1 gallons per sq. ft. per day (retail) Site 14 (Retail) 0.1 gal/d/sf x 10,000 sf = 1,000 gpd *use 0.1 gallons per sq. ft. per day (retail) Site 15 (Retail) 0.1 gal/d/sf x 10,000 sf = 1,000 gpd *use 0.1 gallons per sq. ft. per day (retail) Site 16 (Restraunt) 35.0 gal/d/seat x 500 seats = 17,500 gpd *use 35 gallons per seat per day (restraunt) Total Site Sanitary Demand: = 61,228 gpd Page 684 of 1174