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San Joaquin County <br /> Environmental Health Department DIRECTOR <br /> Donna Heron, REHS <br /> r. ' 1868 East Hazelton Avenue <br /> Nell Stockton , California 95205-6232 PROGRAM COORDINATORS <br /> Robert McClellon, REHS <br /> —_— Jeff Carruesco, REHS, RDI <br /> Kasay Foley, REFIS <br /> 4T r F o R �` website: ww 09)46 3420 hd Linda Turkatte, REHS <br /> Phone : {209) 408 -3420 <br /> Fax: (209) 4664-0138 <br /> September 26, 2012 <br /> Brian A. Waite, P. G . <br /> Chevron Environmental Management Company <br /> 6101 Bollinger Canyon Road, BR1X-5321 <br /> San Ramon , CA 94583 <br /> RE: Chevron # 9-4054 <br /> 2103 Country Club Blvd . <br /> Stockton , CA 95204 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed Notice of <br /> Intent for General Waste Discharge Requirements R5-2008-0949 with Enhanced Anerobic <br /> Biological Oxidation Pilot Study Work Plan (Plan) dated May 23 , 2012, submitted on your behalf <br /> by Arcadis . The Pian discusses conducting a sulfate injection and land application pilot test to <br /> address the on-site contaminant mass-source. The pilot test will include injection and monitoring <br /> well installations, baseline sampling , periodic injections of sulfate solution, land application and <br /> infiltration of sulfate, and associated performance monitoring . The objectives of the pilot test are: <br /> 1 ) Determine the site-specific hydrological and injection parameters necessary to design <br /> and implement an injection-based treatment. <br /> 2) Test petroleum hydrocarbon treatment efficacy using sulfate-based anaerobic oxidation. <br /> 3Confirm intrinsic biogeochemical controls of secondary water quality.inclutding—sulfate <br /> and sulfide generated as sulfur end products of microbial sulfate reduction . <br /> The EHD approves the Plan contingent upon approval of the Central Valley Regional Water <br /> Quality Control Board (CVRWQCB) for the injections. Permits for well installations will be issued <br /> by the EHD. <br /> If you have any questions call Lisa Medina (209) 468-3455 or email Imedinapsjcehd . com <br /> Lisa edina , REI IS ' Nuel C. Henderson Jr. PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <br /> c: Jim Barton, CVRWQCB, 11020 Sun Center Drive #200, Rancho Cordova , CA 95670 <br /> Mark Springs, 3535 Windham Circle, Stockton , CA 95209 <br />