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./0 <br /> L4 <br /> GROUNDWATER <br /> TECHNOLOGY, INC. <br /> __-- OIL RECOVERY SYSTEMS 4080 Pike Lane, Suite D, Concord, CA 94520-1227(415)671-2387 <br /> January 28, 1987 <br /> 20-2894 <br /> Dave Lewis O <br /> The Southland Corp. P <br /> P.O. Box 404 <br /> Pleasanton, CA 94566-0040 Fc,FA, 7 <br /> ENVIROMENTAL HEALTH <br /> Re: Attached Project Update Report FERMITISERVICES <br /> Dear Dave, <br /> Attached herewith is Groundwater Technology, Inc. ' s project <br /> update report for the 7-Eleven store located at 9110 Thornton <br /> Road, Stockton, California. The report presents the activities <br /> and observations at the site through January 19, 1987. This <br /> letter addresses concerns raised at the interagency meeting on <br /> December 29 , 1986 and provides recommendations based on the <br /> current conditions at the site. <br /> To further define the areal extent of the dissolved hydro- <br /> carbon plume beneath the site, installation of two previously <br /> proposed monitoring wells, MW13 and MW14, should be completed. <br /> The wells should be constructed to accomodate the installation of <br /> a pumping system if necessary. The installation of these two <br /> wells is currently scheduled for the week of Febuary 2, 1987 . <br /> The most recent sampling of groundwater from the monitoring <br /> wells at the site suggests that the dissolved plume may extend in <br /> a southeasterly direction as far as monitoring well 10 . If on <br /> the next scheduled sampling, February 9 , 1987 , the presence of <br /> dissolved hydrocarbons is again noted in monitoring well 10, the <br /> installation of a pumping system should be implemented within <br /> pumping well 2 or monitoring well 10 . The pumping system <br /> initially proposed for pumping well 2 was installed in monitoring <br /> well 12 because of the presence of dissolved hydrocarbons within <br /> the well which is in close proximity to the domestic well TMG. <br /> h," - i,Id. R• Tampa. R. M,uvl- 11,• 1.A. A,r.,�,.,1 ,11 <br /> \L I\ .. \IJ.i'h a,1, F,r,1 i':\ V-r,ir ,.. V., ., ......., <br />