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MEMORANDUM Page 3 of 7MIN� <br /> Holly Trading <br /> Tracy,, CA M■ S I E G F R I E D <br /> CA <br /> Min. <br /> Working <br /> Min. Volume for 1 <br /> Calculated Tank Detention Detention Day <br /> Volume (CTC) County Time per Tank Volume Time based Retention <br /> Building min County Used (TV) on TV (gallons) <br /> Area ADF (gallons) (days) (gallons) da s ADF/0.70 <br /> 1 1521.9 2266.43 3.2 4,000 4 2174.1 <br /> 2 253.65 1453.65 3.2 4,000 4 362.4 <br /> 3 1521.9 2266.43 3.2 4,000 4 2174.1 <br /> 4 253.65 1453.65 3.2 4,000 4 362.4 <br /> Totals 3551.1 7440.15 16,000 <br /> IV. Filter Bed Calculations <br /> Traditional Leach line Requirements = (CTC+ADF) * Soil Factor <br /> _ (7440.15 gallons + 3551.1 gallons) *0.25 <br /> = 2,747.81 ft <br /> SF at soil effluent=2,747.81 *4 (Soil Bed Factor) = 10,991.3 sq. ft. <br /> Due to high ground water elevations and limited space for a large leach field a filter bed will be deployed <br /> using the Soil Acceptance Rate as a basis for design: <br /> Soil Acceptance Rate (Chesney 2019) = 0.311 gal/sqft/day (see Appendix A, page 9)/1.25 SF = 0.249 <br /> gal/sqft/day <br /> Maximum ADF for Soil Acceptance Rate= 0.249 gal/sqft/day * 14,880 sqft= 3,705.1 gal/day <br /> Actual square footage within the Infiltrator chambers: <br /> Total SF= 70 ft/leach line * 12 ft/leach line * 10 leach lines = 8,400 sqft <br /> Total SF=45 ft/leach line * 12 ft/leach line * 12 leach lines = 6,480 sqft <br /> V. Design and Operational Specifications for Dosing/Surge Tank <br /> and the Filter Beds: <br /> Pump: Zoller 163 1/2hp with 2" FM. <br /> Discharge Assembly:The 2"discharge pipe from the dosing tank will be connected to a 4" PVC tight <br /> line by a 2X4 reducer—this will reduce the energy by decreasing the velocity in the pipe. This 4" <br /> PVC tight line will be a minimum of 30 linear feet long before discharging into the distribution box. <br /> The distribution box is designed with a 2" drop at the entrance. <br /> There will be a total of twenty-two (22) outflow pipes connected to two distribution boxes. Each <br /> distribution box will have eleven (11)outflow pipes connected to it.All pipes will be 4"PVC tight lines <br /> and range in length, with the minimum length being 2 linear feet. At the transition to the perforated <br /> Stockton San Jose Sacramento Modesto <br /> 3428 Brookside Rd. 111 N. Market St.,#300 900 Howe Ave,#200 100 Sycamore Ave,#100 <br /> Stockton, CA 95219 San Jose, CA 95113 Sacramento,CA 95825 Modesto, CA 95354 <br /> t:209.943.2021 t:408.754.2021 t:916.520.2777 t:209.762.3580 <br /> F:\17projects\17017 Holly Sugar Industrial\Civil\Septic Sizing-Prelim\17017 E&E Sanitary Sewer Design Criteria Memo Rev 3.docx <br />