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MEMORANDUM Holly E&E Trading Tracy, CA Page 3 of 9 SIEGFRIED IV. Filter Bed Calculations Traditional Leach line Requirements = (CTC+ADF)'` Soil Factor _ (4,800 gallons + 4,900 gallons) * 0.25 = 2,425 ft SF at soil effluent =2,425 * 4 (Soil Bed Factor) = 9,700 sq. ft. Due to high ground water elevations a filter bed will be deployed using the Soil Acceptance Rate as a basis for design: Soil Acceptance Rate (Chesney 2019) = 0.311 gal/sgft/day (see Appendix A, page 9) = 0.311 gal/sgft/day Maximum ADF for Soil Acceptance Rate = 0.311 gal/sgft/day * 15,756 sgft = 4,900 gal/day Actual square footage within the Infiltrator chambers: Total SF= 70 ft/leach line * 12 ft/leach line " 10 leach lines = 8,400 sgft Total SF= 48 ft/leach line " 12 ft/leach line " 13 leach lines = 7,488 sgft V. Design and Operational Specifications for Dosing/Surge Tank and the Filter Beds: Pump: Zoller 163 1/2hp with 2" FM. Discharge Assembly: The 2" discharge pipe from the dosing tank will be connected to a 4" PVC tight line by a 2X4 reducer —this will reduce the energy by decreasing the velocity in the pipe. This 4" PVC tight line will be a minimum of 30 linear feet long before discharging into the distribution box. The distribution box is designed with a 2" drop at the entrance. There will be a total of twenty-two (22) outflow pipes connected to two distribution boxes. Each distribution box will have eleven (11) outflow pipes connected to it. All pipes will be 4" PVC tight lines and range in length, with the minimum length being 2 linear feet. At the transition to the perforated lines, the pipes will drop 2" to the edge of the leach field. At the edge of the leach field, the 4" PVC F:\17projects\17017 Holly Sugar Industrial\Civil\Septic Sizing -Prelim\17017 E&E Sanitary Stockton San Jose Sacramento Min. 3428 Brookside Rd. 111 N. Market St., #300 900 Howe Ave, #200 100 Sycamore Ave, #100 Stockton, CA 95219 San Jose, CA 95113 Working Modesto, CA 95354 t: 209.943.2021 Min. t: 916.520.2777 Volume for 1 t: 209.762.3580 Calculated Tank Detention Detention Day Volume (CTC) County Time per Tank Volume Time based Retention Building min County Used (TV) on TV (gallons) Area ADF(gallons) (days) (gallons) (days) ADF/0.70 1 21100 21700 2.3 41000 3 31000 2 350 11550 2.3 4,000 13 500 3 21100 2,700 2.3 4,000 3 31000 4 350 1,550 2.3 41000 3 500 IV. Filter Bed Calculations Traditional Leach line Requirements = (CTC+ADF)'` Soil Factor _ (4,800 gallons + 4,900 gallons) * 0.25 = 2,425 ft SF at soil effluent =2,425 * 4 (Soil Bed Factor) = 9,700 sq. ft. Due to high ground water elevations a filter bed will be deployed using the Soil Acceptance Rate as a basis for design: Soil Acceptance Rate (Chesney 2019) = 0.311 gal/sgft/day (see Appendix A, page 9) = 0.311 gal/sgft/day Maximum ADF for Soil Acceptance Rate = 0.311 gal/sgft/day * 15,756 sgft = 4,900 gal/day Actual square footage within the Infiltrator chambers: Total SF= 70 ft/leach line * 12 ft/leach line " 10 leach lines = 8,400 sgft Total SF= 48 ft/leach line " 12 ft/leach line " 13 leach lines = 7,488 sgft V. Design and Operational Specifications for Dosing/Surge Tank and the Filter Beds: Pump: Zoller 163 1/2hp with 2" FM. Discharge Assembly: The 2" discharge pipe from the dosing tank will be connected to a 4" PVC tight line by a 2X4 reducer —this will reduce the energy by decreasing the velocity in the pipe. This 4" PVC tight line will be a minimum of 30 linear feet long before discharging into the distribution box. The distribution box is designed with a 2" drop at the entrance. There will be a total of twenty-two (22) outflow pipes connected to two distribution boxes. Each distribution box will have eleven (11) outflow pipes connected to it. All pipes will be 4" PVC tight lines and range in length, with the minimum length being 2 linear feet. At the transition to the perforated lines, the pipes will drop 2" to the edge of the leach field. At the edge of the leach field, the 4" PVC F:\17projects\17017 Holly Sugar Industrial\Civil\Septic Sizing -Prelim\17017 E&E Sanitary 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 Sewer Design Criteria Memo Ver 4.docx