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' SAN -] 0A QU I N Environmental Health Department <br /> COUNTY <br /> Jasjit Kang, REHS, Director <br /> c�tiFoa��� Greatness grows here. Muniappa Naidu,REHS,Assistant Director <br /> PROGRAM COORDINATORS <br /> Jeff Carruesco,REHS, RDI <br /> Willy Ng, REHS <br /> Steven Shih, REHS <br /> Michelle Henry, REHS <br /> Elena Manzo, REHS <br /> March 8, 2023 Natalia Subbotnikova, REHS <br /> Rosa Chen <br /> 2000 Center St. Suite 303 ORIGINAL <br /> Berkeley CA 94704 <br /> RE: Soil Suitability/Nitrate Loading Study <br /> 1000 Roth Rd, Lathrop CA 95330 <br /> APN 198-200-16, SR0086464 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br /> Loading (SSNL) Study, dated March 2, 2023 and 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 long-term impact of nitrate to groundwater from the proposed gate <br /> building. <br /> Based on the information provided, the EHD can make the following findings: <br /> 1. The Soil Suitability/Nitrate Loading Study supports the suitability for the proposed OWTS usage <br /> pursuant to San Joaquin County Ordinance Code Title 9-604.010 (d). <br /> 2. The Percolation test conducted on April 19, 2019 yielded percolation rates of 13.3 min/inch. At this rate, <br /> a minimum 8 feet of soil separation is required between bottom of the dispersal field and the <br /> groundwater. The SSNL reports groundwater level between 25 to 30 feet below surface grade. (San <br /> Joaquin County OWTS Standard Table 1.10.2). <br /> If you have any questions please contact Francisco Garcia Ruiz, Registered Environmental Health Specialist, <br /> at fgarciaruiz@sjgov.org or (209) 616-3032. <br /> Steven Shih, REHS <br /> Program Coordinator <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 />