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DIRECTOR <br /> San Joaquin County Donna Heran,REHS <br /> o� N Environmental Health Department ASSISTANT <br /> rieC t IDIa,REHSR <br /> Laurie <br /> 600 East Main Street <br /> Q � Stockton, California 95202-3029 PROGcarl Bo 9m 0.REHSATORS <br /> Mike Huggins,REHS,RDI <br /> Ov.org/ehd Margaret Lagorio,REHS <br /> ,. ..P • Website: www.S1CJ Robert McClellon,REHS <br /> C"4ki,6R4 Phone: (209) 468-3420 Jeff Carruesco,REHS,RDI <br /> Fax: (209) 464-0138 Kasey Foley,REHS <br /> OCT 2 9 2007 <br /> HARDEV & AMARJIT KHINDA ETAL <br /> BILL BORGH <br /> C27000 S LEEWARD <br /> ONOCOPHILLIPS <br /> TRACY CA 95304 <br /> 76 BROADWAY <br /> SACRAMENTO CA 95812 <br /> RE: Circle K / Service Station #01205 SITE CODE: 507198 <br /> 16470 Cambridge Drive. RO#:0138 <br /> Lathrop, CA. 95330 GT Global ID#: T0607700822 <br /> The San Joaquin County Environmental Health Department (SJCEHD) has <br /> reviewed Revised Corrective Action Plan (CAP) dated September 18, 2007 as <br /> submitted by Secor International Inc., and has the following comments. <br /> The revised CAP was submitted at the request of the SJCEHD to address <br /> additional remedial option evaluations that were not included in the original CAP. <br /> The concerns with in-situ air sparging have been adequately addressed and the <br /> SJCEHD considers the feasibility study submitted in the revised CAP to be <br /> complete and supported by the opinions submitted by Secor. <br /> The dual phase extraction (DPE) tests conducted on this site indicated that this <br /> remedial alternative could work on this site but were not as cost-effective as the <br /> options chosen by Secor, ozone injection and soil vapor extraction. <br /> The revised CAP is adequate and necessary and tentatively approved by <br /> the SJCEHD [H&S Code 25296.10(c)(3)]. <br /> Prior to receiving final approval for this corrective action, the Central Valley <br /> Regional Water Quality Control Board (CVRWQCB) must evaluate the proposal <br /> for ozone injection for Waste Discharge Requirements (WDR). Please contact <br /> Mr. James L. Barton at the CVRWQCB concerning the WDR evaluation. <br /> If the CVRWQCB approves ozone injection, then as required by the under <br /> ground storage tank (UST) regulations, the public will be notified of the CAP by <br /> the EHD. You will be required to submit an Executive Summary that will be used <br /> in the public notice. <br />