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ultv <br /> °Pc°G SAN J 0 A Q U I N Environmental Health Department <br /> COUNTY Jasjit Kang, REHS,Director <br /> Muniappa Naidu, REHS,Assistant Director <br /> Greatness grows here. PROGRAM COORDINATORS <br /> Jeff Carruesco, REHS, RDI <br /> Willy Ng, REHS <br /> Michael Kith, REHS <br /> Michelle Henry, REHS <br /> Elena Manzo, REHS <br /> April 19, 2023 <br /> To: San Joaquin County Community Development Department <br /> Attention: Giuseppe Sanfilippo <br /> From: Jeffrey Wong; 209-468-0335 <br /> Lead Senior Registered Environmental Health Specialist <br /> RE: PA-2200157 (IP), Referral, S00015201 <br /> 12470 East Locke Road, Lockeford <br /> The following requirements were identified as pertinent to PA-2000007 (PP) and the current status of the <br /> conditions are provided below as requested through PA-2200157. <br /> 1. A soil suitability and nitrate loading study incorporating proposed staff and customer use shall be <br /> submitted to the Environmental Health Department, indicating that the area is suitable for septic <br /> system usage. The studies must be approved by the Environmental Health Department prior to <br /> issuance of a building permit. (San Joaquin County Development Title, Section 9-1105.2(d)). The <br /> fee will be based on the current schedule at the time of payment. <br /> The sewage disposal system shall comply with the onsite wastewater treatment systems <br /> standards of San Joaquin County prior to approval. A percolation test conducted in accordance <br /> with the E.P.A. Design Manual - Onsite Wastewater and Disposal Systems is required for each <br /> parcel. The fee will be based on the current schedule at the time of payment. <br /> • The condition above has not been atisfier/ A Coil Suitability and Nitrate Leading <br /> ding <br /> Study(SSNLS) for this speGifiG projeGt has not been proWded or approved. Per the <br /> Program Coordinator-, the cub '_cion - a r�ie. of the SAILS will neer) to he <br /> T! -(TT4�C�AITIr,TT T rVI�{T!� Tr 1Pi1TITCG�Tp-pC <br /> completed prior to the issuance of CertifiGate of OGGunan y <br /> • The condition has been satisfied. EHD has accepted an updated calculation of the <br /> nitrate loading concentration. The original calculation was provided in the <br /> Addendum to the Soil Suitability/Nitrate Loading Study dated June 20, 2006 (the <br /> Addendum)prepared by Neil Anderson and Associates for another landuse project. <br /> The Addendum calculation used an average daily flow (ADF) value of 842 gallons <br /> per day (gpd), which exceeds the value of 450 gpd as proposed in this reference <br /> PA-2200157 project (the 450 gpd is based on the proposed 30 employees over 4 <br /> shifts at 15 gallons/employee.) The updated calculation keeps the original ADF of <br /> 842 gpd, but substitutes a more conservative value of 85 mg/L-N for Effluent Stream <br /> Nitrate concentration (Nw) over the original lower value of 50 mg/L-N used in the <br /> Addendum since EHD requires 85 mg for commercial septic systems. The result of <br /> the updated mass-balance calculation of Total Nitrate-N percolate concentration to <br /> groundwater (Nr) is 6.36 mg/L-N (compared to 4.1 mg/L-N calculated in the 2006 <br /> Addendum), which is below the maximum contaminate level for nitrogen of 10 mg/L- <br /> N. <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 />