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MEMORANDUM Page 2 of 7 Holly Trading S I E G F R I E D Tracy,, CA CA Shift Number of ADF Employees (gallons/day) 1 300 1521.9 2 300 1521.9 3 100 507.3 Totals 700 3551.1 Our office accepts the flows as follows: Building Description Number of ADF Area Em to ees allons/da 1 NW Office 300 1521.9 2 NE Office 50 253.65 3 SW Office 300 1521.9 4 SE Office 50 253.65 Totals 700 3551.1 III. Septic Tank Volume Septic Tank Volume (TV) Using the County Disposal Systems Equation 4.1.12 for determining volume of septic tanks: For ADF<1,500 Gallons/Day, TV= 1,200 gallons (Base Tank Capacity) + ADF For ADF>1,500 Gallons/Day, TV= 1,125 gallons + 0.75 ADF For each sump, the minimum allowable septic tank size as determined by the County Disposal Systems Equation is reported in Table C below. The minimum County Tank Volume is then used to calculate the detention time as calculated by the following equation: Detention Time (days) = Tank Volume*.70 (Reduced Volume due to sWdge)/ADF Note our office uses a reduction of 30% of tank volume which is lost over time due to sludge. For Sump Nos. 1, 2, and 3, a traditional septic tank is proposed with a separate lift station to lift the liquid into the leach field. The proposed septic tank is specified as the smallest standard septic tank that meets the required minimum tank volume as calculated by the County. Detention time is then recalculated for the actual septic tank size specified. Stockton San Jose Sacramento Modesto 3428 Brookside Rd. 111 N. Market St.,#300 900 Howe Ave,#200 100 Sycamore Ave,#100 Stockton, CA 95219 San Jose,CA 95113 Sacramento,CA 95825 Modesto, CA 95354 t:209.943.2021 t:408.754.2021 t:916.520.2777 t:209.762.3580 F:\17projects\17017 Holly Sugar Industrial\Civil\Septic Sizing-Prelim\17017 E&E Sanitary Sewer Design Criteria Memo Rev 3.docx