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tp`uuy C`� <br /> SAN J 0 A 0 U I N Environmental Health Department <br /> COUNTY <br /> \,co. Jasjit Kang, REHS, Director <br /> �LIFOAN Greatness grows here. Muniappa Naldu,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 /> September 23, 2021 <br /> Don Chesney, PE <br /> Chesney Consulting <br /> P.O. Box 3794 <br /> Turlock, CA 95381 <br /> RE: Soil Suitability/Nitrate Loading Study <br /> 17454 Von Sosten Rd., Tracy <br /> APN: 209-460-10, SR0084240 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br /> Loading (SSNL) Study, dated September 17, 2021 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 wastewater <br /> treatment system (OWTS) usage and the potential long-term impact of nitrate to groundwater from the <br /> proposed accessory dwelling unit (ADU). <br /> Based on the information provided, the EHD can make the following findings: <br /> 1. EHD will require an oversized 2,000-gallon septic tank for installation of a standard Onsite Wastewater <br /> Treatment System. <br /> 2. Percolation test conducted on August 23, 2019 yielded a percolation rate of 50 minutes/inch. At this <br /> rate, a five-foot soil separation shall be required between bottom of dispersal field and groundwater <br /> pursuant to San Joaquin County Onsite Wastewater Treatment Standard table 1.10.2. Per the San <br /> Joaquin County Water Resource Lines of Equal Depth to Ground Water Map of Fall 2015, groundwater <br /> on site is reported between 30 and 40 feet below surface grade. <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 Michael Suszycki, Senior Registered Environmental Health <br /> Specialist, at msuszycki@sjgov.org or(209) 598-7001. <br /> !t*even0hih, REHS <br /> Program Coordinator <br /> c: Lakhbir Singh Sahota, 17454 Von Sosten Rd., Tracy, CA. 95304 <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 />