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v � s <br /> ARCADIS ARCADIS <br /> Infrastructure, environment, buildings 950 Glenn Drive <br /> Suite 125 <br /> Folsom <br /> California 95630 <br /> Ms. Lori Duncan Tel 916.985.2079 <br /> Senior Registered Environmental Health Specialist Fax 916.985.2093 <br /> San Joaquin County Environmental Health Department w .arcadis•us.com <br /> 600 East Main Street <br /> Stockton, California 95202 <br /> ENVIRONMENT <br /> Subject: <br /> Extension Request for Feasibility Study Submittal <br /> Chevron Facility ID 306415 <br /> Former Unocal#0187 Date: <br /> 437 East Miner Avenue January 29,2010 <br /> Stockton,California <br /> Site Code 1181 Contact: <br /> Tonya R. Myers <br /> Dear Ms. Duncan: Phone: <br /> 916.985.2079 ext 15 <br /> On behalf of Chevron Environmental Management Company(Chevron),ARCADIS Email: <br /> has prepared this letter to request an extension for the submittal of a feasibility study Tonya.Myers@arcadis- <br /> (FS)associated with the site referenced above.The request for an FS was included us.com <br /> within the San Joaquin County Environmental Health Department(SJCEHD)letter <br /> dated December 17,2009. During a telephone conversation on January 20, 2010, our ref: <br /> between Ms. Tonya Myers of ARCADIS and yourself the rational for the extension 60046957.0000 <br /> was discussed which included the conductance of an enhanced anaerobic <br /> biodegradation pilot test prior to the submittal of an FS.The rational for the extension <br /> as well as the submittal date of a work plan detailing the proposed approach was <br /> verbally approved during this conversation.Therefore, prior to February 26, 2010, <br /> ARCADIS will submit a work plan for enhanced anaerobic biological oxidation. <br /> Following the evaluation of enhanced anaerobic biological oxidation as a potential <br /> remedial approach for this site,ARCADIS will prepare a FS detailing all potential <br /> remedial alternatives. It is anticipated that the FS will be submitted during the fourth <br /> quarter 2010. <br /> Imagine the result <br /> \\ca5tp\tlata)apmlechanvchevmn\3o6015t2 mmmunication\mnesponC nce\conespontl nce regulaloMextansion nxtuest_"21010e%doc <br />