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°- c SAUDAQUIN <br />n* `) COU NTY <br />c�i,Foa?�P' Greatness grows here. <br />March 17, 2022 <br />Luis Ramirez <br />9028 E Waterloo Road <br />Stockton, CA 95215 <br />RE: Soil Suitability/Nitrate Loading Study <br />10330 East Eight Mile Road <br />APN: 089-020-23, SR0084919 <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 February 15, 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 a three (3) 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 16.28 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 February 11, 2022 yields a percolation rate of 13.15 min/inch. At this <br />rate an 8 foot soil separation is required between bottom of dispersal field and groundwater (San <br />Joaquin County OWTS Standard Table 1.10.2). Groundwater is reported at 105 feet below surface. <br />If you have any questions please contact Frank Girardi, Senior Registered Environmental Health Specialist, <br />REHS, at fvgirardi@sjgov.org or (209) 616-3044. <br />Steven Shih, REHS <br />Program Coordinator <br />CC: Evan Schmidt, AdvancedGeo Corporate Headquarters, 837 Shaw Road Stockton, California 95215 <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 />