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SAN JOAQUIN Environmental Health Department <br /> COUNTY <br /> Kasey Foley, REHS, Interim Director <br /> ko:o Greatness rows here. <br /> .��Fba. 9 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 /> January 14, 2020 <br /> Mike Clark <br /> TPH Architects <br /> 519 McHenry Avenue <br /> Modesto, CA 95352 <br /> RE: Soil Suitability/Nitrate Loading Study <br /> Escalon High School Ag Farm Complex <br /> 17970 South Van Allen Road, Escalon <br /> APN 205-250-14, SR0080627 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Soil Suitability/Nitrate <br /> Loading Study (SSNL) submittal, dated September 24, 2019 and submitted September 26, 2019, for the <br /> above noted location and has the following comments for your consideration. <br /> • The SSNL 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, <br /> for a proposed Escalon High School Ag Farm Complex. The SSNL does not provide sufficient <br /> information to indicate the area is suitable for the OWTS usage for the proposed project, pursuant to <br /> San Joaquin County Ordinance Code Title 9, Section 9-1105.2(d), as noted below. <br /> • The nitrate loading study assumed wastewater generated for 1 cow was approximated to be equivalent <br /> to 8 dogs which equals 80 gallons per day. Per EHD wastewater flow cattle are expected to generate <br /> wastewater of 150 gallons per day. Should the total wastewater volume generated for the parcel <br /> exceed 10,000 gallons, approval from the Central Valley Regional Water Quality Control Board must <br /> be obtained. Please provide a nitrate loading evaluation using the cumulative wastewater volume and <br /> nitrate contribution from all sources for the parcel. Provide supportive data and or reasoning for the <br /> average annual rainfall recharge rate value used in the study. <br /> • The Ag Complex is proposed to be connected to the existing Small Public Water System. This action <br /> will require a permit amendment application be submitted to the EHD prior to occupancy. Please <br /> contact Robert McClellon, REHS, Program Coordinator, at (209) 468-0332 or mmcclellon(a-)_sigov.org <br /> for more information. <br /> If you have any questions please contact Michael Kith, REHS, Program Coordinator, at (209) 468-3444 or <br /> mkith(a_slgov.orq. <br /> M chael Kith, REHS <br /> Program Coordinator <br /> c: Kleinfelder <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 />