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■ <br /> ■ SIEGFRIED <br /> MEMORANDUM <br /> To: Michael Kith, REHS <br /> FE <br /> CH,y 9l <br /> From: Paul Schneider, P.E. 6,,/� <br /> Date: 9/13/2022 2 �r <br /> CIV11- ��4P <br /> Re: Holly Commerce Center Sanitary Sewer SOF CA�-1F <br /> Design and Operational Parameters <br /> Buildings HSI <br /> I. Introduction <br /> Our office has been retained by Holly Commerce Center, LLC (Owner)to prepare a design report and to <br /> document the design and operational parameters for the proposed sanitary sewer system for the Holly <br /> Commerce Center Buildings H and I. In this report, we refer to the San Joaquin County Onsite <br /> Wastewater Disposal Standards dated January 2017 (County Disposal Standards). <br /> II. Average Daily Flow (ADF) — Peak Use <br /> The Average Daily Flow was calculated as follows: <br /> Assumptions: <br /> 1. 8 hours per shift <br /> 2. 3 shifts per day (50 first shift, 50 second shift, 25 third shift) <br /> 3. 1 restroom use every 2.172 hours per employee <br /> 4. 3.683 uses per shift per employee <br /> 5. 2 gallons per use for 60% of the uses as toilets and 1.25 gallons per use for 40% of the uses as <br /> urinals <br /> Assume 60% of uses are toilet uses and 40% of uses are urinal uses and a factor of safety of 1.25 <br /> yielding <br /> 3.683 uses per shift per employee * 0.6 * 2.0 gal per toilet use = 4.42 gal per shift per employee <br /> (4.42 gpd) <br /> 3.683 uses per shift per employee * 0.4* 1.75 gal per urinal use = 2.58 gal per shift per employee <br /> (2.58 gpd) <br /> 4.42 gal per shift per employee + 2.58 gal per shift per employee * 1.25 (Factor of Safety) = 8.75 <br /> gal per shift per employee <br /> Where: <br /> Toilet Use = Toilet and sink are considered one fixture at 2 gal/use <br /> Urinal Use = Low flow urinal and sink are considered one fixture at 1.75 gal/use <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 H&I Sanitary Sewer Design Criteria Memo.docx <br />