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San Joaquin County <br /> .P° Environmental Health Department DIRECTOR <br /> o�� c\ <br /> "�'� �� <br /> 600 East Main Street Donna Heran. REHS <br /> Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> l li'LZ %t Robert McClellon. REHS <br /> • Jeff Carruesco, REHS, RDI <br /> Website: www.sjgov.org/ehd Kasey Foley, REHS <br /> iii o R Linda Turkatte. REHS <br /> Phone: (209) 468-3420 <br /> Fax: (209) 464-0138 <br /> April 5, 2012 <br /> Mr. Dan Silva <br /> Ms Tina Mayhew <br /> West Clay Properties <br /> Post Office Box 6152 <br /> Stockton, California 95206 <br /> Subject: West Clay Properties <br /> 639 West Clay Street <br /> Stockton, California 95206 <br /> Dear Ms Mayhew and Mr. Silva: <br /> By letter dated 19 December 2011, the San Joaquin County Environmental Health <br /> Department (EHD) had directed you to submit to this department by 03 February 2012 a <br /> feasibility study comparing several remedial technologies, and a recommendation as to the <br /> preferred remedial technology. In the same letter, the EHD directed the effects of ozone <br /> injection be evaluated and presented to the California Regional Water Quality Control Board <br /> Central Valley Region (CRWQCBCVR) for Notice of Intent requirements to comply with the <br /> terms of General Waste Discharge Requirements (WDR), and the Monitoring and Reporting <br /> Program No. R5-2008-0149 <br /> By electronic mail dated 06 February 2012, Advanced GeoEnvironmental, Inc. (AGE). your <br /> consulting firm, provided "a reference to the direction of the EHD to evaluate the site for <br /> WDR AGE stated that The site was previously evaluated and the report of the ozone bench <br /> scale test was submitted to the EHD." AGE included a copy of the Revised Ozone Injection <br /> Pilot Study Work Plan. dated 27 October 2005.. in which the results from the ozone injection <br /> bench scale test had been discussed. <br /> The EHD is well aware of the ozone injection bench scale study results and comments made <br /> by the CRWQCBCVR by electronic mail dated 16 September 2005 concerning the bench <br /> scale test. By letter dated 17 April 2006, the EHD approved a twenty-four-week in-situ ozone <br /> sparge (IOS) pilot study Neither the CRWQCBCVR nor the EHD has record of receiving an <br /> IOS pilot study report following the twenty-four week study. For the CRWQCBCVR to approve <br /> future ozone injections at this site, you must submit a Notice of Intent for the injection permit <br /> and a draft monitoring and reporting program to that agency for review. Please contact the <br /> CRWQCBCVR for further assistance <br />