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ST^/ ITUS 3330 Cameron Park Drive, Ste 550 <br /> ENVIRONMENTAL INC <br /> Cameron Park, California 95682 <br /> %p(� (530)676-6004-Fax:(530)676-6005 <br /> �E� `J E� LE FQJ April 7, 2006 <br /> APR 1 S 'LO Z) <br /> Mr. Nuel Henderson, P.G. ENVIRGNMENT HEALTH <br /> San Joaquin County <br /> PERMIT/SrRVICES <br /> Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re: Former ARCO Station No. 6100, Located at 25775 Patterson Pass Road, Tracy, <br /> California(LOP No. 1708) <br /> This letter is intended to document our discussion this morning regarding the status of the <br /> offsite assessment activities associated with the above-referenced site. As we discussed, <br /> Stratus has nearly completed this phase of work, including preparation of most of the Site <br /> Conceptual Model (SCM). However, the newly installed groundwater monitoring wells <br /> located in the field, south of the site, have yet to be developed and sampled due to the <br /> saturated condition of the field. Given the diameter and the total depth of the wells, a <br /> development rig is necessary to properly develop the wells, and vehicular access to the <br /> well locations is required. Once the wells are developed and sampled, the SCM will be <br /> completed and submitted. Weather permitting, we are hopeful that development and <br /> sampling can be completed within 30 days, and the SCM submitted shortly after <br /> receiving the laboratory results. <br /> If you have any questions regarding this site,I can be reached at(530) 676-6000. <br /> Sincer , <br /> 5 A 5 E 1 N ENTAL, INC. <br /> 1 <br /> y . Jo son <br /> Cc: Mr. Don Pratt, Atlantic Richfield Company <br /> Mr. Rusty Benkosky, SECOR International, Inc. <br /> KA\Bp-Arco for URS\6100\Correspondence\Arco 6100 Well Dev Letter 04-07-06.doc <br />