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SAN JOAQUIN <br />Vii_ COUNTY <br />Greotness grows here. <br />April 25, 2022 <br />Maria Navarro & Miguel Navarro <br />336 E. Watters Rd. <br />French Camp, CA. 95231 <br />RE: Soil Suitability/Nitrate Loading Study <br />336 E. Watters Rd., French Camp, CA. 95231 <br />APN: 193-310-04, SR0084419 <br />Environmental Health Department <br />Jasjit Kang, REHS, Director <br />Muniappa Naidu, REHS, Assistant Director <br />PROGRAM COORDINATORS <br />Robert McClellon, REHS <br />Jeff Carruesco, REHS, RDI <br />Willy Ng, REHS <br />Melissa Nissim, REHS <br />Steven Shih, REHS <br />The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br />Loading Study (SSNL) dated October 25, 2021 for the above noted location and has the following comments <br />for your consideration. <br />The SSNL Study was prepared to determine the suitability of the above noted parcel for onsite wastewater <br />treatment system (OWTS) usage and the potential long-term impact of nitrate to groundwater to construct a <br />septic system for the unpermitted second dwelling unit sharing a septic system with the permitted dwelling <br />unit on the property. <br />Based on the information provided the EHD can make the following findings: <br />1. According to the SSNL, the estimated nitrate loading from existing and proposed Onsite Wastewater <br />Treatment System (OWTS) usage is 6.3 mg/L as nitrate -nitrogen and the maximum contaminant <br />level of 16.3 mg/L-N. EHD will require an engineered OWTS to mitigate the excessive nitrogen. <br />2. Percolation test conducted on October 1, 2021, yield a percolation rate of 1.77 min/inch. At this rate, <br />minimum 20 feet of soil separation is required between bottom of dispersal field and the <br />groundwater. The SSNL reports a historic groundwater level of 19 feet below surface grade. (San <br />Joaquin County OWTS Standard Table 1.10.2). <br />3. The OWTS and its 100% replacement areas shall meet all required minimum setbacks stated in San <br />Joaquin County (OWTS) Standard and Well Standard. <br />If you have any questions please contact Aldara Salinas, Environmental Health Specialist, EHS, at <br />asalinas@sjgov.org or (209) 616-3019. <br />At'Steven Shih, REHS P. <br />Program Coordinator i <br />CC: Live Oak Geo Environmental, Inc.- 407 W. Oak St., Lodi, Ca. 95240 <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 />