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+Y j Unocal Corporation <br /> Diversified Businesses <br /> 2000 Crow Canyon Place,Suite 400,-- �.7�1 <br /> -Sara Ramon,California 94583 i fi.. ;z.. <br /> r Telephone(510)887-0760rrT <br /> Facsimile(510)277-2309 j°' <br /> 10 <br /> UNOCAL* <br /> October 30, 1995 <br /> Mr. Harlin Knoll, Sr. REHS <br /> Site Mitigation Unit <br /> Northern Region Environmental Health Division <br /> Corporate Environmental <br /> Remediation and Technology San Joaquin County <br /> P. O. Box 388 <br /> Stockton,CA 95201-0388 <br /> Former Unocal Station#6015 <br /> 601 East Kettleman Lane <br /> Lodi,CA <br /> Dear Mr, Knoll: <br /> Several months ago in a telephone conversation, you indicated that San Joaquin County would <br /> pursue closure for this site if: 1. Another quarter of groundwater sampling showed no detectable <br /> levels of hydrocarbons in the groundwater and 2. Hydrostatic levels of groundwater continued to <br /> remain at similar levels to that of the past several years. <br /> 1 am pleased to present data that meets that criteria. Attached for your use are the analytical <br /> results of the most recent groundwater monitoring and sampling. These data is not presented in <br /> the normal format because the site is on an semi-annusi monitoring program. Unocal believes <br /> this most recent data is sufficient to warrant closure at this site. <br /> Also included for your use is a completed case closure summary for the site. Because of retail <br /> service station operations at the site by a dealer who no longer works for Unocal, we find <br /> ourselves in a position of increasing liability for the site. Unocal requests that San Joaquin <br /> County EHD review the site at your earliest convenience and if you concur, grant closure for the <br /> site. if we can be of further help, please call me at 510-277-2384. <br /> Sincerely yours, <br /> David B. De Witt <br /> Sr. Environmental Geologist <br /> cc: R. D. Sisk <br /> Robert Kezeriart, KEI <br />