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SAN JOAQUIN <br />COUNTY <br />Greatness grows here. <br />February 1, 2022 <br />Jose Valdovinos <br />733 Shadowbrook Lane <br />Manteca, CA 95330 <br />RE: Soil Suitability/Nitrate Loading Study <br />285 South Austin Road <br />APN: 22802048, SR0084717 <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 />Michelle Henry, REHS <br />The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br />Loading Study (SSNL) dated January 11, 2022 for the above noted location and has the following comments <br />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 nitrate loading impact to groundwater from the proposed <br />OWTS usage from the four-bedroom single family residence (SFR). <br />Based on the information provided the EHD can make the following findings: <br />a. Based on the information provided the EHD finds that the SSNL Study does not support the suitability <br />for standard OWTS usage for the proposed development pursuant to San Joaquin Development Title <br />9, Section 9-1105.2(d). The proposed OWTS usage will cause a long term buildup of Nitrate -Nitrogen <br />in the groundwater of 16.02 mg/L; this is above the acceptable Maximum Contamination Limit of 10 <br />mg/L established by the California Water Resources Control Board. <br />b. EHD requires an OWTS designed by a California Registered Engineer. Submit engineered OWTS <br />design plans under a service request form to this department. The design must mitigate the excessive <br />long term buildup of Nitrate -Nitrogen in the groundwater from the proposed OWTS usage (OWTS <br />Standards Section 7.1). <br />c. Annual operating permit is required, Fee for annual operation permit is due at time of OWTS permit <br />application (OWTS Standards Section 2.10). <br />d. Percolation test conducted on January 5, 2022 yields a percolation rate of 6.67 min/inch. At this rate <br />an 8' soil separation is required between bottom of dispersal field and groundwater (San Joaquin <br />County OWTS Standard Table 1.10.2). Groundwater is reported at 20-25 feet below surface. <br />If you have any questions please contact Aaron Gooderham, Registered Environmental Health Specialist, <br />REHS, at agooderham@sjgov.org or (209) 616-3062. <br />Steven Shih, REHS <br />Program Coordinator <br />CC: Rudy Xavier Baca, 633 Pioneer Ave. Lathrop, CA 95330 MA � <br />Baez Geotechnical Group, 2060 Colorado Ave, STE B, Turlock, CA 95382 <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 />