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'�cauiiy z <br /> � c SAN J O A Q U I N Environmental Health Department <br /> Q,,ti' <, COU N T Y— <br /> Linda Turkatte, REHS, Director <br /> Greotness grows here. Kasey Foley,REHS,Assistant Director <br /> PROGRAM COORDINATORS <br /> Robert McClellon,REHS <br /> Jeff Carruesco,REHS, RDI <br /> Willy Ng,REHS <br /> Muniappa Naidu, REHS <br /> August 30, 2019 Michael Kith, REHS <br /> Kevin Dougherty <br /> First Commercial Real Estate 00u,A�" <br /> 2920 Pacific Avenue <br /> Stockton, CA 95204 <br /> RE: Soil Suitability/Nitrate Loading Study <br /> 8200 N. Hwy 99, Stockton <br /> APN 085-310-10, SR0080452, PA-1900152 UP <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the two Soil <br /> Suitability/Nitrate Loading Study (SSNL) submittals, both dated December 7, 2019, the first submitted on April <br /> 10, 2019 and the second submitted on July 11, 2019, for the above noted location and has the following <br /> comments for your consideration. <br /> The SSNL Study was prepared to determine the suitability of the above noted location for onsite wastewater <br /> treatment system (OWTS) usage, including to estimate the potential for nitrate impact to groundwater, for a <br /> proposed 600 member church. <br /> Based on the information in the SSNL Study, the EHD cannot make a finding that the site is suitable for OWTS <br /> usage for the proposed project. The specific issues are summarized below. <br /> • The two percolation tests conducted at the site indicate the soils in that area cannot adequately accept <br /> wastewater for subsurface infiltration. These two percolation tests were conducted close to the existing <br /> water well and may not have met the required setbacks. Additional percolation testing must be <br /> conducted to identify areas for wastewater dispersal, sufficient in size to accommodate the wastewater <br /> expected to be generated for the proposed project. All percolation testing must be conducted outside <br /> of any OWTS setbacks and at least 200 feet from the onsite water well. <br /> • The SSNL Study indicates there will be an average daily flow of 6,000 gallons of wastewater per day. <br /> An area of sufficient size to accept 6,000 gallons of wastewater per day must be identified and shown <br /> to be suitable for wastewater disposal by satisfactory percolation testing. In addition, a suitable area <br /> must be identified by satisfactory percolation testing to be reserved as the required 100% replacement <br /> area. The intensity of the development proposal and the size of the parcel may not provide sufficient <br /> area for OWTS usage. A site map showing all items drawn to scale, including the OWTS and <br /> replacement OWTS area. All OWTS and replacement areas must be shown on the site map to meet <br /> all setback requirements and cannot be paved, driven, or built over. <br /> • The nitrate loading evaluation indicates the proposed OWTS may impact groundwater above water <br /> quality standards. This impact must be mitigated by supplemental treatment to provide a minimum <br /> 50% nitrogen reduction in the effluent wastewater. An OWTS with supplemental treatment must be <br /> designed by an engineer certified by the State of California. <br /> 1868 E. Hazelton Avenue I Stockton, California 95205 1 T 209 468-3420 1 F 209 464-0138 1 www.sjcehd.com <br />