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i <br /> ARCADIS BBL <br /> _ ARCADIS U.S., Inc. <br /> Inhasrructure, environment, facilities (V , h 04:rIlI h%ALili 10470 ou Placerville Rma <br /> Tg R"ICES suae 110 <br /> Sacramento <br /> Caefo nne 95027 <br /> Mr. Michael J. Infuma TN 9161857.0124 <br /> San Joaquin County Environmental Health Department Fa: 916.843.1965 <br /> 304 East Webber Avenue w .a oamo oo.00a, <br /> Third Floor <br /> Stockton, California 95202 <br /> INDUSTRIAL ,r <br /> subject <br /> 9A <br /> Amendment to Corrective Action Plan Revision <br /> Former Chevron Service Station 9-4054 <br /> 2103 Country Club Boulevard <br /> Stockton, California Date <br /> April 5, 2007 <br /> Dear Mr. Infuma: conord <br /> David M. Evans <br /> On behalf of Chevron Environmental Management Company (Chevron), ARCADIS <br /> U.S., Inc. (ARCADIS BBL, formerly known as Blasland, Bouck & Lee, Inc.) has Phone. <br /> prepared this letter to propose an amendment to the Corrective Action Plan Revision 916.857.0124 x226 <br /> (CAP Revision), dated March 30, 2006 and Response to Comments — Corrective Enual <br /> Action Plan Revisions, dated May 31 , 2006 for former Chevron Station 9-4054 david.evans@ <br /> located at 2103 Country Club Boulevard in Stockton, California. This Amendment to arcadis-us.com <br /> CAP Revision has been prepared pursuant to a phone conversation between Ms. <br /> Tonya Myers of ARCADIS BBL and yourself on March 8, 2006. The proposed Dor fe6 <br /> amendments to the CAP Revision associated with Task 2 — Vapor Intrusion Pathway 80045492 <br /> Evaluation include the following: <br /> 1 . The temporary vapor probes will be installed as permanent probes <br /> 2. Soil vapor data will be evaluated against the Office of Environmental Health <br /> Hazard Assessment (OEHHA) soil screening levels and values calculated <br /> using the Department of Toxic Substances Control (DTSC) derived <br /> screening approach <br /> The purpose of these amendments is to ensure that data collected during the soil <br /> vapor assessment is representative of site conditions and is in compliance with <br /> current DTSC guidelines. <br /> The amended Task 2 of the CAP Revision is presented below: <br /> Imagine the result <br /> SAN JOAQUIN COUMV <br /> ENVIRONMENTAL HEALTH DEPA11111M <br /> 304 E WEBER AVE THIRD FLOW <br /> STOCKTON CA 95202 <br /> (209) 4684420 <br /> i� Approved <br /> Approved with changes: See Remarks <br /> ❑ arks pr ved : See Remarks <br /> Rgmerks <br /> d <br /> By <br /> ApOrsval sxtands only to thatvl ich is shown and described <br /> l rlim and does not authoriz or approve any omission or <br /> devisllrr ham requirements of state laws or local ordinances . <br />