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OP,pUTA/Com. <br /> %� S Q N AQN Environmental Health Department <br /> COUNTY Kasey Foley, REHS, Interim Director <br /> 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 /> March 26, 2020 <br /> Dennis M. Souza <br /> 27420 Walnut Ct <br /> Tracy, CA 95304 <br /> RE: Soil Suitability/Nitrate Loading Study <br /> 27420 Walnut Ct, Tracy <br /> APN 248-240-21, SR0081849 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil <br /> Suitability/Nitrate Loading (SSNL) Study, dated February 28, 2020 and submitted on March 5, 2020 <br /> for the above noted location, and has the following comments for your consideration. <br /> The SSNL Study was prepared to determine the suitability of the above noted parcel for onsite <br /> wastewater treatment system (OWTS) usage and the potential impact of nitrate to groundwater for <br /> the proposed project development. The proposed development project includes: <br /> 1. An existing four-bedroom house and the proposed three-bedroom second unit dwelling with <br /> the OWTS total usage of 450 gallons per day. <br /> According to Soil Suitability/Nitrate Loading (SSNL) Study, the estimated nitrate loading from this <br /> existing and proposed OWTS usage is 34.5 mg/L-N; it is above the water quality objective of 10 <br /> 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 <br /> Water Quality Control Board OWTS policy (Boards Policy). <br /> b. A Registered Civil Engineer shall submit complete engineering design plan to EHD for <br /> approval prior to issuance of building permit. Fee will be based on the current fee schedule <br /> at time of 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 <br /> the effluent and under leach field is required. The first sampling shall be done six (6) <br /> months after the OWTS installation. Sampling results shall be submitted to EHD for review. <br /> The EHD may reduce 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 />