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�1 Unocal Corporation <br /> / Diversified Businesses <br /> i� 2000 Crow Canyon Place,Suite 400 <br /> . ., <br /> 1!-7 5an.gaammppn,California 94583 <br /> „ + ° Telepfwne �(510)867-0760 <br /> Ta simile(510)277-2309 <br /> UNOCAL* <br /> December 12, 1995 <br /> Mr. Harlin Knoll, Sr. REHS <br /> Northern Region Site Mitigation Unit <br /> Corporate Environmental <br /> Remediation and Technology Environmental Health Division <br /> San Joaquin County <br /> P. O. Box 388 <br /> Stockton, CA 95201-0388 <br /> Former Unocal Station 46015 <br /> 601 East KettIeman Lane <br /> Lodi,CA <br /> Dear Mr. Knoll: <br /> In our most recent conversation,you indicated that you needed one more round of satisfactory <br /> groundwater monitoring data before this site could be closed. Please find attached a copy of the <br /> most recent sampling data. I have also included a completed case closure summary form as you <br /> requested. <br /> I have talked with Kaprealian Engineering with regard to abandonment of the monitor wells at <br /> the site. We are of the opinion that pressure grouting is the most acceptable means of <br /> abandoning the wells since we would have the least impact on the current operator's business. If <br /> this is acceptable to you, please send me a letter indicating so and I will have Kaprealian prepare <br /> and submit to you a work plan for the abandonment of the monitor wells. <br /> As always, if there is a question or concern, please call me at 510-277-2384 so that we can <br /> discuss. <br /> Sincerely yours, <br /> David B. De Witt <br /> Sr. Environmental Geologist <br /> cc: R. D. Sisk <br /> Robert Kezerian, KEI <br /> i <br />