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f <br /> ahwmn <br /> WO <br /> Chevron. <br /> The overexcavation performed during April and May of this year was successful at remediating all <br /> remaining sources of groundwater contamination. The soil analytical data obtained during the <br /> abandonment of MW-1, -2, -3, and MW-6 provided verification that no sources of groundwater <br /> contamination remain outside of the overexcavated area Considering these information, along with <br /> the fact that only trace levels of dissolved hydrocarbon remain in the groundwater, it would seem <br /> appropriate at this time to recommend this site for case closure. Do you concur? <br /> To assist in your review of this site for case closure I am providing.the following two attachments: <br /> 1) an estimate of the hydrocarbon mass remaining in soil; and 2) a chronology of all site <br /> environmental activity. <br /> If you have any questions or comments, I can be reached at(510) 842-8695. <br /> Sincerely, <br /> l <br /> Brett L. Hunter <br /> Environmental Engineer <br /> Site Assessment and Remediation <br /> Attachments <br /> W. Elizabeth Thayer, Central Valley Regional Water Quality Control Board, Sacramento,CA <br /> A.G. Spanos Construction, Inc., 1341 W. Robinwood Dr., Stockton,.CA 95207 <br /> Bette Owen, Chevron USA, Products Company, San Ramon, CA (w/o attachments) <br /> I <br /> 1 <br /> tecyeWd <br /> fiseyct�l3t� _ <br />