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OR <br /> Ew <br /> Mr. Russell Chapin <br /> January 9, 1991 <br /> Page 2 <br /> water are <br /> Acceptable ("Action") levels of BTEX in drinking <br /> F; and 0 62 ppm. respectively. No California or <br /> O .Ofll, 0.1, 0 .68, resent far TPHg concentrations in <br /> Federal standards exists at p <br /> water. <br /> Based on the results of laboratory analyses of the samples <br /> f ears <br /> that we collected, the soil and groundwater eg the sFurther <br /> to have been contaminated to a significant and t . <br /> ,,,sired to define the extent and to mitigate <br /> work will be rem- three <br /> contamination. This work should include a minimum of <br /> nitoring wells, exploration to delineate the <br /> groundwater mo <br /> vertical and lateral extent of soil and groundwater <br /> is contamination, and to select and implement appropriate remedial <br /> ns <br /> actions. The format and content of futurevests ationia Regional <br /> �., should follow guidelines established by <br /> the Water Quality Control Board. <br /> ed by Chapin Brothers, Inc. indicates <br /> information supp <br /> li <br /> is largely or entirely <br /> that the contamination the result of a <br /> approximately 18 years ago, while the station was <br /> tank failure a roximately 12,000 <br /> owned by Shell Oil Company. At that time, pp <br /> gallons of gasoline were lost over a 60-day period prior to <br /> ! replacement. The tanks have passed recent integrity <br /> tank reF <br /> tests, and therefore do not appear to be contributing to the <br /> t � <br /> existing problem. <br /> � 5 <br /> f <br /> E <br /> F <br /> ROGER FOOTT ASSOCIATES, INC. <br /> Hyl`_'✓ T•ti�f', 4�<T') <br /> 4 <br /> •la",q, ____— .rte. _ <br />