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SAN. JOAQUIN Environmental Health Department <br /> r.r <br /> ----C O U N T Y-- Jas'it Kan REHS, Director <br /> r j 1 g <br /> Greatness r/ruv:s here.. MuniappaNaidu,REHS,Assistant Director <br /> PROGRAM COORDINATORS <br /> Robert McClellon,REHS <br /> Jeff Carruesco, REHS, RDI <br /> Willy Ng,REHS <br /> Steven Shih,REHS <br /> Michelle Henry,REHS <br /> Elena Manzo, REHS <br /> September 27, 2022 <br /> Julio Tinajero <br /> Milestone Associates Imagineering, Inc. <br /> 1000 Lincoln <br /> RE: Onsite Wastewater Treatment System (OWTS) Plan Check <br /> APNA Petroleum Corporation <br /> 29700 S. Ahern Rd, Tracy <br /> APN 255-020-14/ PA-1600049 (UP) Truck Stop/Convenience Store; SR0085076 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the engineer designed <br /> OWTS plan (the Plan) dated 2/28/2022 prepared by Paul Wesley Donoho (REHS) and Ross P. Shoaf (PE), <br /> the Plan's subsequent modifications dated 8/8/2022 and 9/12/2022; the August 2022 revised Operation and <br /> Maintenance Plan (O&M) from the original July 2022 submittal, and two subsequent testing protocol <br /> addendum in September and 9/14/2022. This OWTS is for the landuse project PA-1600049 (UP) consisting <br /> of a truck wash, gas station, and convenience store <br /> The Plan calls for installation of the following: <br /> - An Orenco AX100 treatment system comprised of 5 primary filter pods and 2 secondary filter pods <br /> - A 2,000-gallon Grease Interceptor <br /> - A 20,000-gallon two-cornpartment Darco fiberglass Septic Tank <br /> - A 8,000-gallon Pre-Anoxic Tank (PF300512) <br /> - A 5,000-gallon Primary circulating tank <br /> - A 4,000 gallon Post-anoxic tank <br /> - A 2,500 gallon secondary recirculating tank <br /> - A 5,000 gallon Dosing tank <br /> - A disposal field of thirty 72 ft long leach lines comprised of 5 fields with 6 leach lines each. <br /> - Jet Style Mixing Unit for the Post-Anoxic Tank <br /> - Isolation valves to the Duplex Pump Assemblies <br /> The EHD has approved the Plan with the following conditions: <br /> 1) The Plan is based on numbers provided by GSV Consulting in 09/24/2020 for the average daily load of <br /> 3,225 gallons per day with a maximum load of 6,450 gpd (based on 630 vehicles at 10 gpd and 5 <br /> employees and 30 gallons/employee). These numbers are different from the Nitrate Loading / Soil <br /> Suitability Study dated March 4, 2020 prepared by Live Oak (SR0081908), page 11 and 12, which <br /> estimated an average daily sewage wastewater flow of 7,095 gallons per day (gpd) (based on estimate <br /> of 6,250 gpd from 1,250 customers at 5 gal/customer; plus 845 gpd from 65 employees at 13 <br /> gallon/employee), and a maximum average daily flow of 8,600 gpd. The Plan and the designer justified <br /> the differences in wastewater load estimates with a similar system for a truck stop at Bakerfield, and <br /> other Orenco systems in Amesviille, Ohio and Morgan's Point, Texas. If this proposed engineer <br /> designed OWTS based on the Plan fails to meet the actual wastewater flow, addition/ repair to the <br /> OWTS by an engineer may be required. <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 />