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SANEnvironmental Health Department <br /> ;j <br /> la 1jQ1, —COUNTY— Jasjit Kang, REHS, Director <br /> Muniappa Naidu,REHS,Assistant Director <br /> Greatness grows here. <br /> �_- PROGRAM COORDINATORS <br /> Robert McClellon,REHS <br /> Jeff Carruesco,REHS,RDI <br /> Willy Ng,REHS <br /> Michael Kith,REHS <br /> Melissa Nissim,REHS <br /> Steven Shih,REHS <br /> March 2, 2021 <br /> Serna Property <br /> Sal Serna <br /> 155 Edward Ct <br /> Tracy, CA 95376 <br /> RE: Soil Suitability/Nitrate Loading Study <br /> 76 W. Bowman Rd, French Camp <br /> APN 193-260-19, SR0083332 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br /> Loading (SSNL) Study, dated February 23, 2021 for the above noted location, and has the following <br /> 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 long-term impact of nitrate to groundwater for the following proposed <br /> three-bedroom second unit dwelling. <br /> Based on the information provided, the EHD can make the following findings: <br /> a. According to the SSNL, the estimated nitrate loading from existing and proposed OWTS usage is <br /> 13.90 mg/L as nitrate-nitrogen and the maximum contaminant level of 10 mg/L-N. EHD will require <br /> the mitigation of nitrate-nitrogen through an engineered Onsite Wastewater Treatment System. <br /> b. Percolation test conducted on February 16, 2021 yield percolation rate of 4.39 min/inch. At this <br /> rate, a 20' soil separation is required between bottom of dispersal field and groundwater. <br /> Groundwater at site is 15-20' below ground surface. (San Joaquin County OWTS Standard <br /> Section 1.10.2). <br /> c. A Registered Civil Engineer shall submit complete engineering design plan to EHD for approval <br /> prior to issuance of building permit. The engineer plan shall mitigate above-mentioned concerns. <br /> Fee will be based on the current fee schedule at time of payment. <br /> If you have any questions please contact Naseem Ahmed, Senior Registered Environmental Health <br /> Specialist, at nahmed@sjgov.org or (209) 616-3018. <br /> Steven Shih, REHS <br /> Program Coordinator <br /> c: Live0ak <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 />