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SENT BY=EMCON � 7-16-97 : 5:26PM : EMCON SACRAMENTO :H 2/ _> <br /> CALIFORNIA REGIONALCR QUALITY CONTROL BOARD i Cal/EPA <br /> e CENTRAL VALLEY REGION <br /> 3443 Routier Road,Suite A <br /> Sacramento,CA 95827-3098 <br /> Phone(916)255-3000 ia <br /> FAX(916)255-3015 77KEITED Pate Wilson,Governor <br /> VIA FACSIMILE J U L 16 1997 <br /> 11 July 1997 <br /> yY wJtlrla) �1{� <br /> Mr.Bud Duke <br /> EMCON <br /> 1433 North Market Boulevard <br /> Sacramento CA 958341943 <br /> CONCURRENCE ON DECOMMISSIONING OF WATER SUPPLY WELLS,STOCKTON <br /> TERMINALS TECHNICAL COMMITTEE FACILITIES,PORT OF STOC%TON <br /> Staff has reviewed the workplan submitted by EMCON which proposes, among other things, <br /> decommissioning of two water supply wells at the above-referenced facilities. The workplan is dated <br /> 15 May 1997 and was submitted on behalf of the Stockton TerminalsTechnical Committee(STTC). <br /> The two water supply wells proposed for decommissioning are designated 8112 and 17A1. The reason <br /> for the decommissioning is the concern that these deep, old wells are no longer used, and may provide <br /> conduits for contaminant migration into the deeper water bearing zones. <br /> Staff understands that the wells will be perforated from base to top of casing at three-foot intervals,and <br /> will be pressure grouted in accordance with San Joaquin County regulations and the latest version of <br /> California Well Standards(California Department of Water Resources Bulletins 74-90 and 7481). A <br /> permit for this activity will be required from San Joaquin County Public Health Services. <br /> Please inform staff at least two days in advance when the work is to be performed- If you have any <br /> questions,please call me at(916)255-3119. <br /> /y J� State California <br /> State Water Resources Control Board �. <br /> AIL WIGGETT C.E.G. Division of Clean Water Programs <br /> Underground Storage Tank Cleanup Fund <br /> Associate Engineering Geologist Program <br /> Aboveground Storage Tanks Program Mai P..O r sox 94421 zo <br /> Sacramento, CA 94244-2120 <br /> Toru Okamoto (916) 227-4406 <br /> GJW:gw Associate Governmental ATSS 8-498-4406 <br /> Program Analyst FAX (916) 227-4530 <br /> cc: San Joaquin County Public Health Services, Stockton <br /> Alexander Krygsman, Port of Stockton. Stockton <br /> Robert Donovan, Tesoro Refuting,Marketing and Supply, Seattle <br /> Ann Duarte-Wilkinson,Time Oil <br /> Marilyn Guthrie, ARCO Products Co. <br /> Kyle Mullins,ST Services <br /> Recycled Papa (Jur mission Is to prarene and mho rhe quality of California's water ruaurces.and <br /> ensure theirproper allocation andef richt urefor the benefli ofprerent andfiaare goaaadonr. <br />