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2o�uiNCZ�, SANc10AQUIN <br />C O U N T Y----- <br />Greotness grows here. <br />April 251", 2022 <br />Roddan Construction, Inc. <br />289 John Kamps Way, <br />Ripon, Ca. 95366 <br />RE: Soil Suitability/Nitrate Loading Study <br />7681 W. Linne Rd., Tracy <br />APN:248-080-38, SR0084964 <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 8, 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 />addition of a two bedroom accessory dwelling. <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 15.4 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 7.5 min/inch. At this rate an <br />8 foot 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 88 to 92 feet below surface. <br />If you have any questions please contact Aldara Salinas, Environmental Health Specialist, at <br />asalinas@sjgov.org or (209) 616-3019. <br />Steven Shih, REHS <br />Program Coordinator A <br />►�`-� G ` r <br />CC: Abby Racco, LiveClak Geo Environmental, <br />e 5A, <br />Inc. 407 W. Oak St., Lodi, Ca. 95240. <br />P <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 />