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� COMMERCIAL ARCHITECTURE <br /> INC. <br /> May 24, 2019 <br /> San Joaquin County Environmental Health Department <br /> 1868 E. Hazelton Avenue <br /> Stockton, CA 95205 <br /> Attention: Linda Turkatte, REHS, Director <br /> Subject: Ahern Truck Stop and Fueling Center, Tracy, CA <br /> Wastewater Calculations based on San Joaquin County Standards <br /> Dear Linda, <br /> Per your request, below are the flow rates per day for the waste water systems for <br /> the subject project based on the January 2017 edition of the San Joaquin County <br /> Onsite Wastewater Treatment Systems Standards. These calculations were <br /> performed by a licensed Mechanical Engineer (Kent Laws, Laws and Associates <br /> in Burlingame, CA) and based on the numbers provided to us in the project traffic <br /> study. <br /> Per Chapter 6 Commercial Onsite Wastewater Treatment Systems Table 6.6 Water <br /> Computation Table: <br /> Restaurants: 100 gallons/seat/day <br /> Service stations: 10 gallons/vehicle served/day <br /> Assumptions given as basis for calculations: <br /> Restaurant seating: 56 <br /> Quantity of vehicles served per day (per traffic study): 940 <br /> Calculations for Average Daily Flow (ADF): <br /> • Restaurant: 100 gallons/seat/day x 56 seats = 5600 gallons/day <br /> • Vehicles served per day: <br /> 940 x 10 gallons/vehicle served/day = 9400 gallons /day <br /> o Total ADF = 9400 + 5600 = 15,000 gallons/day <br /> Please let me know if you have any questions. <br /> Thank you, <br /> Stacey Wellnitz <br /> Project Manager <br /> 616 1 4T" STREET <br /> MODESTO, CALIFORNIA 95354 <br /> PHONE 209. 5'/1 .B 1 58 FAX 209.571 .81 60 <br />