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San Joaquin County DIRECTOR <br /> �o U I N Donna Heran,RENS <br /> o... .p.x- Environmental Health Department <br /> ASSISTANT DIRECTOR <br /> pG <br /> 600 East Main Street Laurie Cotulla,REHS <br /> 5 Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> Carl Borgman, REHS <br /> � P . . Mike Huggins, REHS, RDI <br /> Website: wwwSjgovorg/ehd <br /> L►k o R Margaret Lagorio,REHS <br /> Phone: (209) 468-3420 Robert McClellon,RENS <br /> Fax: (209)464-0138 Jeff Carruesco, REHS, RDI <br /> Kasey Foley,REHS <br /> EXECUTIVE OFFICER <br /> CENTRAL VALLEY REGIONAL JUL' 0 5 2007 <br /> WATER QUALITY CONTROL BOARD <br /> 11020 SUN CENTER DRIVE #200 <br /> RANCHO CORDOVA CA 95670 <br /> RE: ARCO Service Station No. 6080 SITE CODE: 0712 <br /> 85 Louise Avenue <br /> Lathrop, CA <br /> In a letter dated April 13, 2006, San Joaquin County Environmental Health Department <br /> (EHD) informed you of our determination that the site investigation and remedial action <br /> of contamination resulting from an unauthorized release from the underground storage <br /> tanks currently located at the above referenced site had been completed. Your staff <br /> informed EHD on May 31, 2006, that since the concentrations remaining in the soil by <br /> the dispensers exceeded Tier 1 screening levels that additional information was <br /> required. In response to this request ARCO submitted a document titled "Risk Based <br /> Corrective Action Analysis" dated June 29, 2007. EHD is again requesting concurrence - <br /> on our determination that no further action is required at this site. <br /> Enclosed is an updated "Case Closure Summary" and chronology for this site. <br /> According to our Local Oversight Program contract with the State Water Resources <br /> Control Board the "Case Closure Summary" is to be forwarded to you. If our agency <br /> has not received written correspondence from you, detailing problems with closure of <br /> this site, within 30 days of your receipt of this letter, our agency will request destruction <br /> of the monitoring wells. Environmental Health Department will mail the responsible <br /> party a "Case Closure Letter" ("No Further Action Letter") when all our requirements <br /> have been met. <br /> If you have any questions, please contact Margaret Lagorio at (209) 468-3449. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Margaret Lagorio, REHS <br /> Program Coordinator Unit IV/LOP <br /> Enclosure <br /> cc: CVRWQCB —Jim Barton <br /> ARCO-Don Pratt <br />