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Rod Nelson <br /> Page 2 <br /> It appears that the re-excavation removed the bulk ; of the <br /> f contaminated soil, withlthe only remaining area to be defined being <br /> to the west of the former tank pit, under the building. <br /> All the monitoring wells have confirmed groundwater contamination, <br /> with monitoring well three, the downgradient well, showing the. <br /> highest levels. <br /> In following Tri--Regional Guidelines, the next step is to define <br /> the extent of the groundwater contamination with the installation <br /> of additional monitoring wells. . When the groundwater contamination <br /> plume is totally defined, remediation of the groundwater under the <br /> site can begin. <br /> Therefore, a work plan'11to investigate the full lateral extent of', <br /> the groundwater contamination is requested. Please submit by <br /> October -7, 1991. a <br /> If you have any quest'ioris, contact Linda Turkatte, EHS, of my staff' <br /> at (209) 468-3442 . <br /> Jogi Khanna, M.D. , M.P.H. <br /> Health ficer , <br /> aurie A. Cotulla, REHS,, Program Manager <br /> ( EKivironmental Health Division <br /> -//LAC LT:nr <br /> c: CVRWQCB - Elizabeth -Thayer <br /> c: WaterWork - John Lane <br /> 1710 Main St. , Escalon, CA 95320 <br /> qi <br /> :I x <br />