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SECOih wwwsecoccom <br /> INTERNATIONAL 3017 Kilgore Road,Suite 100 <br /> S E C O R INCORPORATED Rancho Cordova,CA 95670 <br /> 916-861-0400 TEL <br /> 916-861-0430 FAX <br /> September 18, 2007 <br /> /Mr. Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Webber Avenue, Third Floor <br /> Stockton, CA 95202 SEP 2 p 2007 R� <br /> Re: Revised Corrective Action Plan EN�IRUNMSEFVICESH Ltf'0� <br /> Circle K Store No. 01205 <br /> PERMI71 <br /> 16470 Cambridge Drive <br /> Lathrop, California <br /> Dear Mr. Infurna: <br /> SECOR International Incorporated (SECOR) is pleased to submit the enclosed Revised Corrective <br /> Action Pian dated September 18, 2007, for the above-referenced site. The following revisions are <br /> included: <br /> 1. Section 4.2 has been revised to include more recent groundwater monitoring data; <br /> 2. Section 6.1 has been revised to include evaluation of soil vapor extraction and air sparging; <br /> 3. Section 6.2 has been revised to include reasoning for selecting soil vapor extraction and <br /> ozone sparge over soil vapor extraction and air sparge; <br /> 4. Table 3 was revised to include cost estimates of soil vapor extraction and air sparge. <br /> If there are any questions or comments regarding the contents of this document, please contact me <br /> at (916) 861-0400 ext. 228. <br /> Sincerely, <br /> SECOR International Incorporated <br /> Clinton Harms <br /> Senior Scientist �\ <br /> cc: Mr. Bill Borgh, ConocoPhillips <br /> Mr. James Barton, RWQCB <br />