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°amu'"c <br /> SAN JOAQUIN Environmental Health Department <br /> COUNTY— Wayne Fox, REHS, Interim Director <br /> °q4 ° Greatness grows here. PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> Jeff Carruesco, REHS, RDI <br /> Willy Ng, REHS <br /> Muniappa Naidu, REHS <br /> Michael Kith,REHS <br /> Melissa Nissim, REHS <br /> April 28, 2020 <br /> Mike Torell II <br /> T2 Construction <br /> 2475 Dunn Rd <br /> Merced, CA 95340 <br /> RE: Engineer Plan Check for Wastewater System Design (Holding Tank) <br /> Joe Grindstone Association <br /> 13550 Highway 12, Lodi <br /> APN 055-020-02, SR0081813 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Wastewater System <br /> Design (the Plan) prepared by Kjeldsen, Sinnock & Neudeck, Inc. (KSN) dated October 2019, and two <br /> additional Design Submittals submitted to EHD on February 20, 2020, to install a 5,000-gallon waste-water <br /> holding tank (the tank) at the above-referenced location (the site). In a conversation with Mike Torell on April <br /> 28, 2019, he confirmed the proposed tank is only for the bathroom facilities and the Picnic/ BBQ area sink; <br /> the tank will not be connected to any of the boat slips or floating homes. <br /> EHD has the following comments for your consideration: <br /> 1. The proposed location of the tank is about 67 feet from waterway based on the scaled diagram on <br /> Sheet CS001 and also off Google Map. Minimum setback requirement for tank to waterways is 100 <br /> feet according to Table 1.5 of Section 1.5 of the San Joaquin County Onsite Waste Treatment System <br /> (OWTS) Standards. The tank does not meet this setback. <br /> 2. In Water System Calculation (2414-0010, dated 10/18/2019) included in the Plan, KSN estimated: <br /> - Peak Day Use of 85 attendees/day, <br /> - Overnight Water Use of 40 gallons/capita/day, <br /> - Camp Day Use of 20 gallons/capita/day; <br /> However, in the capacity calculation section which is used to justify the 5,000-gallon holding tank, KSN <br /> listed: <br /> - 320 gallons for Average day demand <br /> - 531 gallons for Peak Day Demand, and 3,750 gallons 7x Peak Week Demand <br /> Using Average camp day use of 20 gallons/day at peak 85 attendees/day, that would work out to 1,700 <br /> gallons/(or 3,400 gallons/day at Peak Day Use), and in a week, that demand would be 11,900 gallons, <br /> in contrast to the 3,750 gallons listed by KSN. Please provide further clarification to the calculations <br /> and numbers. <br /> 3. KSN proposed a 5,000-gallon holding tank. Section 10.4 of the OWTS Standards requires: <br /> The liquid holding capacity shall be a minimum of seven (7) days of peak wastewater flow <br /> generation with a one-hundred(100)percent reserve capacity. <br /> Even if EHD accepts the 3,750 gallons for 7x Peak Week Demand (see above Item #1), the proposed <br /> 5,000 gallons capacity does not meet the required 7 day flow plus 100% reserve, which would be <br /> 7,500 gallons. Please provide additional information or revision that will meet this requirement. <br /> 1868 E. Hazelton Avenue I Stockton, California 952051 T 209 468-3420 1 F 209 464-0138 1 www.sjgov.org/ehd <br />