Loading...
HomeMy WebLinkAbout009_Sanitary Sewer Flow Calculations - Stamped Thriftway Super Stop Sanitary Sewer Flow Calculations Flow Rate from Bathrooms Employee Estimate 12 (assumes 3 shifts of 4 employees) Customer Estimate 180 (assumes 10 customer facility users 12hrs/day and 5 users 12hrs/day) Avg. Employee Daily Flow Rate 12 gpcd (Per DEQ Circular 4, Sec. 3.1,Table 3.1-1) Avg. Customer Estimate 3 gpcd (Per DEQ Circular 4, Sec. 3.1,Table 3.1-1) Avg. Daily Flow= 684 gal/day Peaking Factor 4.15 (Harmon Formula) Peak Flow Rate= 2838.6 gal/day 1.971 gpm 0.0044 cfs Total Flow to Sanitary Sewer Contributing Area 2.036 acres Assumed Infiltration Rate 150 gal/acre/day Infiltration = 305.4 gal/day 0.212 gpm Avg. Daily Flow= 989 gal/day Peak Flow Rate= 2.183 gpm 0.005 cfs 8-inch PVC Pipe @ 75%Capacity m- ,. Pipe Diameter= 8 in Manning's n= 0.013 (for PVC) Min. Slope= 0.004 ft/ft ) � �°, � A Area = 0.3491 ftZ Perimeter= 2.0944 ft vp let Hydraulic Radius= 0.1667 ft �i 'Y ' ; ?r'`_::.'': p a;. $ 4 Qr.0= 0.7643 cfs QO.75= 0.5732 cfs