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SAN JOAQUIN <br />COUNTY <br />Acr..11" r <br />iFos=t\ Greatness grows here. <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 />Steven Stith, REHS <br />Michelle Henry, REHS <br />Elena Manzo, REHS <br />August 29, 2022 <br />Don Chesney <br />Chesney Consulting <br />PO BOX 3794 <br />Turlock CA 95381 <br />RE: Soil Suitability Study <br />9015 W Walnut Grove Rd., Thornton, CA. 95686 <br />APN 001-140-40, SR0085701 <br />The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability (SS) <br />Study, dated August 26, 2022 for the above noted location, and has the following comments for your <br />consideration. <br />The SS study was prepared to determine the suitability of the above noted parcel for onsite wastewater <br />treatment system (OVVTS) for a proposed repair/upgrade to the system. <br />Based on the information provided, the EHD can make the following findings: <br />The Percolation tests conducted on March 17, 2022 yielded percolation rates of 35.7 min/inch, 8.3 <br />min/inch, and 83.3 min/inch. At this rate, a minimum 5 feet of soil separation is required between <br />bottom of the dispersal field and the groundwater. The SS study reports a historic groundwater <br />level of 10 feet below surface grade. (San Joaquin County OVVTS Standard Table 1.10.2). <br />The OVVTS and its 100% replacement areas shall meet all required minimum setbacks stated in <br />San Joaquin County (OVVTS) Standard and Well Standard. <br />If you have any questions please contact Francisco Garcia Ruiz, Environmental Health Specialist, at <br />fgarciaruiz@sjgov.org or (209) 616-3032. <br />Steven Shih, REHS <br />Program Coordinator <br />1868 E. HazeIton Avenue I Stockton, California 95205 I T 209 468-3420 I F 209 464-0138 I www.sjgov.orgiehd