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UIN <br /> ZIP, <br /> °Pnc°�z SAK OAQUIN Environmental Health Department <br /> COUNTY Wayne Fox, REHS, Interim Director <br /> c6Foa��P Greatness grows here. PROGRAM COORDINATORS <br /> Robert McClellon,REHS <br /> Jeff Carruesco, REHS, RDI <br /> Willy Ng, REHS <br /> Muniappa Naidu, REHS <br /> Michael Kith, REHS <br /> Melissa Nissim, REHS <br /> May 19, 2020 <br /> Chad & Jennifer DeJong <br /> P.O. Box 131 <br /> Ripon, CA 95366 <br /> RE: Soil Suitability/Nitrate Loading Study and Addendum <br /> 16475 S. Tide Road, Ripon <br /> APN 203-100-17, SR0082012 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil <br /> Suitability/Nitrate Loading (SSNL) Study, dated September 19, 2019 and its addendum dated May <br /> 19, 2020 for the above noted location and has the following comments for your consideration. <br /> The SSNL was prepared to determine the suitability of the above noted parcel for onsite wastewater <br /> treatment system (OWTS) usage and the potential impact of nitrates to groundwater for the proposed <br /> project development. The nitrate loading study was prepared to determine the long-term nitrate <br /> loading impact from the proposed OWTS. The proposed development project includes: <br /> 1. A four-bedroom home dwelling with OWTS usage of 250 gallons per day of wastewater. The <br /> 250 gallons of wastewater volume is not to be used for septic design or size calculation. <br /> Based on the information provided, the EHD can make the following findings: <br /> The estimated nitrate loading from proposed development shows a potential for nitrate impact to <br /> groundwater above water quality objectives. According to SSNL Study, the estimated long-term <br /> impact of nitrate loading from the proposed OWTS usage is 15.3 mg/L-N; it is above the water quality <br /> objective of 10 mg/L-N. <br /> Based on the information provided, the EHD can make the following findings. <br /> 1. The SSNL Study supports the suitability for OWTS usage with the following conditions: <br /> a. The potential impact of the nitrate to ground water shall be mitigated. OWTS shall utilize <br /> supplemental treatment and meet performance requirements in Section 10.9 of Regional <br /> Water Quality Control Board OWTS policy (Boards Policy). <br /> b. A Registered Civil Engineer shall submit complete engineering design plan to EHD for <br /> approval prior to issuance of building permit. Fee will be based on the current fee schedule <br /> at time of payment. <br /> c. Annual permit is required. Fee for annual operating permit is due at time of OWTS permit <br /> application. <br /> d. To monitor the effectiveness of the supplemental treatment system, quarterly sampling of <br /> the effluent and under leach field is required. The first sampling shall be done six (6) <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 />