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San Joaquin County <br /> ° N. Environmental Health Department DIRECTOR <br /> �._ <br /> Q. 1868 East Hazelton Avenue Donna Heran, REHS <br /> Stockton, California 95205-6232 PROGRAM COORDINATORS <br /> .. r Robert McClellon,REHS <br /> �: Jeff Carruesoo,REHS,RDI <br /> cq. _A Website: www.sjgov.org/ehd Kasey Foley, REHS <br /> F o R Linda Turkatte, REHS <br /> Phone: (209) 468-3420 Rodney Estrada,REHS <br /> Fax: (209)464-0138 Adrienne Ellsaesser,REHS <br /> November 3, 2014 <br /> ExxonMobil Environmental Services Co. Joe Filippi Jr. Trust <br /> c/o Ms. Jennifer C. Sedlachek Bank of Stockton & Ronald Novacek, Co-Trustees <br /> 4096 Piedmont Avenue No. 194 c/o Mr. Robert Fay <br /> Oakland, California 94611 Bank of Stockton Trust Dept. <br /> P. O. Box 201014 <br /> Stockton, California 95201 <br /> Edna Filippi Trust <br /> Ms. Joylyn Novacek & Ms. Diane Filippi, Co-Trustees <br /> c/o Ms. Joylyn L. Novecek <br /> 578 Silver Lake Drive <br /> Danville, CA 94526 <br /> Subject: Former Exxon Service Station No. 73942 LOP Case No.: 2231 <br /> 4444 North Pershing Avenue CUF Claim No.: 5312 <br /> Stockton, California 95207 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed the Central <br /> Valley Regional Water Quality Control Board (Regional Board) 21 August 2014 response to <br /> Revised Notice of Intent for Waste Discharge Requirements, Former Exxon Service Station <br /> 73942, dated 27 June 2014, prepared and submitted to the Regional Board by your consulting <br /> firm, Cardno ERI (Cardno), and Withdrawal of Notice of Intent for Waste Discharge <br /> Requirements, dated 29 September 2014, prepared and submitted by Cardno on your behalf for <br /> the above-referenced site. <br /> By letter dated 3 October 2013, the EHD had approved Work Plan for In Situ Chemical <br /> Oxidation, dated 9 September 2013, with the conditions that: <br /> 1. Prior to injecting the PersulfOx, a Notice of Intent be submitted to the Regional Board in <br /> accordance with Order No. RS-2008-0149. <br /> 2. All requirements of the Regional Board for the proposed scope of work be followed. <br /> 3. A report of findings, with conclusions and recommendations, be submitted to the EHD, <br /> the Regional Board, and uploaded to GeoTracker adhering to the timeline in the Work <br /> Plan for In Situ Chemical Oxidation. <br /> In response to Revised Notice of Intent for Waste Discharge Requirements, on 21 August 2014, <br /> the Regional Board: <br /> • Directed a work plan be submitted to their agency to collect background levels of <br /> sodium, sulfate, nitrate, ammonia, iron, manganese, cadmium, chromium, hexavalent <br />