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NEW �� I� D <br /> ARCADIS APP 11 2008 <br /> ARCADIS <br /> Infrastructure, environment, facilities <br /> ENVIRc)11MEhi1 HEALTH 959Glenn Dr;ve <br /> PFIRMII /SERVICES Suite 125 <br /> Folsom <br /> fornia <br /> 5630 <br /> Mr. Michael J. Infurna Tel <br /> 5-207 <br /> Tel 91fi-985-2979 <br /> Senior Registered Environmental Health Specialist Fax 916-985-2093 <br /> San Joaquin County Environmental Health Department w er.ancarlis-us.com <br /> 600 East Main Street <br /> Stockton , CA 95202 <br /> ENVIRONMENTAL <br /> Subject: <br /> Additional Soil Vapor Sampling Status Update <br /> Former Chevron Service Station 9-4054 <br /> 2103 Country Club Boulevard Date: <br /> Stockton, California April 8, 2008 <br /> Dear Mr. Infurna: Contact: <br /> David M. Evans <br /> On behalf of Chevron Environmental Management Company (Chevron), ARCADIS <br /> has prepared this letter to provide a status update for the implementation of Phone: <br /> collecting additional soil vapor samples at the above-referenced site. This update has 916.985.2079 ext. 12 <br /> been prepared in response to a letter from the San Joaquin County Environmental Email: <br /> Health Department (EHD), dated November 30, 2007. david .evans <br /> @arcadis-us.com <br /> In the letter, the EHD requested the following: <br /> Our ret. <br /> 1 . An additional soil vapor sampling event be conducted during or prior to the B0046032 <br /> third quarter of 2008 <br /> 2. The analysis of soil vapor samples for: <br /> a, total petroleum hydrocarbons in the gasoline range (TPH-GRO), <br /> 1 ,2—dichloroethane (DCA), and methyl tertiary butyl ether ( MTBE) by <br /> United States Environmental Protection Agency (USEPA) Method <br /> TO 15 Modified <br /> 3. The comparison of soil vapor analytical data to San Francisco Bay Region <br /> Water Quality Control Board Environmental Screening Levels (ESL's). <br /> Chevron will comply with this request. However, in addition to the comparison of <br /> analytical data to ESL's data will also be compared against the Office of <br /> Environmental Health Hazard Assessment (OEHHA) soil screening levels and values <br /> Imagine the result <br /> oarcadlsuslafficedaw\sacramenlo-ca\env\chevron\9405412 communication\correspondencekorrespondence regulatory\94054 progress <br /> updole_080402_OTM10950.doc <br />