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QUI <br /> ",c <br /> °ZSANsJOAQUIN Environmental Health Department <br /> 4\ COUNTY Jasjit Kang, REHS, Director <br /> <<glIFO' Greatness grows here. MuniappaNaidu, REHS,Assistant Director <br /> PROGRAM COORDINATORS <br /> Jeff Carruesco, REHS, RDI <br /> Willy Ng,REHS <br /> Steven Shih, REHS <br /> Elena Manzo,REHS <br /> Natalia Subbotnikova, REHS <br /> August 23, 2023 <br /> Angela Ferreira ORIGINAL <br /> 1153 S. Golden Gate Ave <br /> Stockton, CA 95205 <br /> RE: Soil Suitability/Nitrate Loading Study <br /> 1153 S. Golden Gate Ave, Stockton <br /> APN: 157-130-34, SR0087039 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br /> Loading Study (SSNL) dated August 2, 2023 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 /> second unit dwelling. <br /> Based on the information provided the EHD can make the following findings: <br /> a. According to the SSNL, the estimated nitrate loading from existing and proposed OWTS usage is <br /> 16.22 mg/L as nitrate-nitrogen and the maximum contaminant level of 10 mg/L-N. EHD will require <br /> the mitigation of nitrate-nitrogen through an engineered Onsite Wastewater Treatment System. <br /> b. Percolation test conducted on August 11, 2023 yields a percolation rate of 3.79 minutes. At this <br /> rate an 20' soil separation is required between bottom of dispersal field and the groundwater. <br /> Groundwater is reported at 50 feet below surface grade. (San Joaquin County OWTS Standard <br /> Table 1.10.2). <br /> c. The OWTS and its 100% replacement areas shall meet all required minimum setbacks stated in <br /> San Joaquin County (OWTS) Standard and Well Standard. <br /> d. A Registered Civil Engineer shall submit complete engineering design plan to EHD for approval <br /> prior to issuance of building permit. Fee will be based on the current fee schedule at time of <br /> payment. <br /> If you have any questions please contact Naseem Ahmed, Senior Registered Environmental Health <br /> Specialist, at nahmed@sjgov.org or (209) 616-3018. <br /> Steven Shih, REHS <br /> Program Coordinator <br /> CC: Live Oak Geo Environmental- 407 W. Oak Street, Lodi, CA 95240 <br /> 1868 E. Hazelton Avenue I Stockton, California 95205 1 T 209 468-34201 F 209 464-0138 1 www.sjgov.org/ehd <br />