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,s•° "'^� CALIFORNIA REGIOMAL WATER QUALITY CONTROL BOAR Cal/EPA <br /> CENTRAL VALLEWION <br /> i <br /> . 3443 R,outier Road,Suite A <br /> Sacramento,CA 95827-3098 ' <br /> Phone(916)255-3000 <br /> FAX(916)255-3015 <br /> 971/01 /r'.I i; �t Pete Wilson,Govermr <br /> VIA FACSIMILE 41111: 18 <br /> 11 July 1997 <br /> Mr. Bud Duke <br /> EMCON <br /> 1433 North Market Boulevard <br /> Sacramento CA 95834-1943 <br /> CONCURRENCE ON DECOMMISSIONING OF WATER SUPPLY WELLS,STOCKTON <br /> TERMINALS TECHNICAL COMMITTEE FACILITIES,PORT OF STOCKTON <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 74-81). 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 /> AIL / <br /> WIGGETT, C.E.G. <br /> Associate Engineering Geologist <br /> Aboveground Storage Tanks Program <br /> GJW:gw <br /> cc: San Joaquin County Public Health Services, Stockton <br /> Alexander Krygsman, Port of Stockton. Stockton <br /> Robert Donovan, Tesoro Refining, Marketing and Supply , Seattle <br /> Ann Duarte-Wilkinson,Time Oil <br /> Marilyn Guthrie, ARCO Products Co. <br /> Kyle Mullins, ST Services <br /> Recycled Paper Our mission is to preserve and enhance the quality of California's water resources,and <br /> ensure their proper allocation and efficient use for the benefit of present andfuture generations. <br />