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°.� ` °<= SA N J0AQ U I N Environmental Health Department <br /> COUNTY Wayne Fox, REHS, Interim Director <br /> cgtFoa�v� Greotness 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 8, 2020 <br /> Apna Petroleum Corp <br /> Charanjit Julta COPY 3940 N. Tracy Blvd <br /> Tracy, CA 95304 <br /> RE: Soil Suifability/Nitrate Loading Study <br /> 29700 S. Ahern Rd, Tracy <br /> APN 255-020-14, SR0081908, PA-1600049 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br /> Loading (SSNL) Study, dated March 4, 2020 submitted on March 18, 2019 for the above noted location, and <br /> has the following comments for your consideration. <br /> The SSNL was prepared to determine the suitability of the above noted parcel for onsite wastewater treatment <br /> system (OWTS) usage and the potential impact of nitrate to groundwater for the proposed project <br /> development. The proposed development project includes: <br /> 1. A 8,625 square foot truck stop and gas station, a 4,000 square foot fast food restaurant, a 3,000 <br /> square foot fuel storage building, a 7,200 square foot lube and truck wash center and a truck scale. <br /> 2. The OWTS usage with wastewater of 845 gallons a day generated from 13 employees and wastewater <br /> of 6,250 gallons a day generated from 1,250 customers. <br /> The estimated nitrate loading from this existing and proposed usage shows a potential for nitrate impact to <br /> groundwater above water quality objectives. According to SSNL Study, the estimated nitrate loading from the <br /> proposed OWTS usage is 42.6 mg/L-N; it is above the water quality objective of 10 mg/L-N. <br /> Based on the information provided, the EHD can make the following findings. <br /> 1. The SSNL Study supports the suitability for OWTS usage with the following conditions: <br /> a. The potential impact of the nitrate to ground water shall be mitigated. OWTS shall utilize <br /> supplemental treatment and meet performance requirements in Section 10.9 of Regional Water <br /> Quality Control Board OWTS policy (Boards Policy). <br /> b. A Registered Civil Engineer shall submit complete engineering design plan to EHD for approval <br /> prior to issuance of building permit. Fee will be based on the current fee schedule at time of <br /> payment. <br /> c. Annual permit is required. Fee for annual operating permit is due at time of OWTS permit <br /> application. <br /> d. To monitor the effectiveness of the supplemental treatment system, quarterly sampling of the <br /> effluent and under leach field is required. The first sampling shall be done six (6) months after the <br /> OWTS installation. Sampling results shall be submitted to EHD for review. The EHD may reduce <br /> the sampling frequency after one year of sampling. <br /> 1868 E. Hazelton Avenue I Stockton, California 95205 1 T 209 468-3420 1 F 209 464-0138 1 www.sjgov.org/ehd <br />