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25 Cupania Circle <br /> Monterey Park,CA 91755 <br /> Phone(323)517-9780 <br /> A S S O C I A T E S i N c , Fax(323)517-9781 <br /> Engineering Individual Solutions www.atcassociates.com <br /> April 22, 2011 <br /> Mr. Mike Infuma �•Z-5 <br /> San Joaquin County Environmental Health Department <br /> 600 East Main Street <br /> Stockton, CA 95202-3029 <br /> RE: Site Redevelopment Status Update Letter <br /> ConocoPhillips Station No. 5449 <br /> Former Thrifty Oil Company Station No. 172 <br /> 7647 Pacific Avenue <br /> Stockton, California 95207 <br /> Mr. Infurna: <br /> On behalf of ConocoPhillips Company (ConocoPhillips), ATC Associates (ATC) has prepared this letter to update <br /> the San Joaquin County Environmental Health Department regarding the status of planned site redevelopment <br /> activities and associated monitoring well installation and repairs. <br /> In a phone call placed today to Miller Pacific, Inc., the contractors responsible for performing the site <br /> redevelopment activities, site redevelopment activities are currently proceeding. Miller Pacific Inc. indicated that <br /> the week of May 16, 2011 is when ATC will be able to install the four previously-proposed on-site monitoring wells, <br /> and repair the three on-site wells which were protected by Stantec Consulting during fourth quarter 2010. At this <br /> time, ATC plans on having Miller Pacific Inc. set the well vaults and concrete pads, to ensure they are flush with <br /> the new pavement that will be laid at the site. Once the well vaults are set, ATC will supervise well development <br /> activities. <br /> ATC is working to secure all necessary permits to install the proposed wells; however. if permits issued by City of <br /> Stockton for the proposed off-site well are not obtained in time, ATC will perform the off-site well installation during <br /> a separate mobilization. <br /> If you have any questions or comments regarding this project, please contact Diane Barclay at (916) 861-0400. <br /> Sincerely, <br /> ATC Associates <br /> Benjamin Chevien, PG <br /> Senior Project Manager <br /> Cc: Mr. Ed Ralston, ConocoPhillips Company (via electronic upload to Livelink) <br /> Larry Higinbotham, Thrifty Oil Company (via electronic mail) <br />