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.. <br /> APPl/ed �:eoSys�enrs`� 4191•E pEJ%ye, Inn Road, Sacramento, CA 95825 (916)451-29p1 <br /> o FREMONT o IRVINE •HOUSTON 0 <br /> BQSTQN o SACRAMENTO •CL1LVfR CITY •SAI+1 <br /> 1Q5c' <br /> December 20, 1990 <br /> 1015gdem <br /> AGS 86091-8 <br /> Mr.Glenn Dembroff <br /> Ultramar inc. <br /> 525 West Third Street <br /> Hanford, California 93230 <br /> Subject: Third Quarter 1990 Sampling of Ground-Water Monitoring Wells at Beacon <br /> Service Station No. S02, 35 North Cherokee Lane, Lodi, California. <br /> Mr. Dembroff: <br /> This report presents the results.of the third quarter 1990 groundwater sam lin that, <br /> Applied GeoSystems conducted at €Jltramar's request at the subject site (see the Sit <br /> Vicinity Map, Plate P-1). The e <br /> concentration of dissolved hydrocarbons ein ground of this awater gat the site-ram ls to monitor the <br /> measuring depths to water,sam linWork included <br /> hydrocarbons, and evaluating the ground-water gradient subjective neath the si e. ne analyses of <br /> the monitoring wells are shown on the Generalized Site Plan, Plate P-2, The locations of <br /> - Present round-Water am lin <br /> On September 2$, 1990,a geologist from Applied GeoSystems measured water levels in t <br /> monitoring wells (see Table 1). These water levels were used tohe <br /> construct the <br /> Potentiometric Map,,Plate P-3. The measurement from monitoring well MW-1 indicate <br /> that the ground-water has dropped below the total depth of the well. The direction <br /> d <br /> of groundwater flow 66-neath the siie on September he <br /> southwest; the gradient ;vas evaluated to be 0.0037 r ' 1990, was evaluated to bee the <br /> We collected grow<td-water samples from each monitoring well except well MW-1 <br /> and <br /> examined the sam?les for floating product, sheen,` and other subjective evidence of <br /> hydrocarbons. No subjective evidence of hydrocarbons was observed__in-an -of-the-_in <br /> monitoring wells.-The geologist then collected ground=wester samples from each monito <br /> — -.- - - - - -- --_ Y - ---- -- -.- <br /> we11 for laboratory analysis. Water purged from the .vsIls was placed in 55-gall truing <br /> approved for this use by the Department of Transportation and stared tennpora on at the <br /> __ site pending removal by Ultramar. <br />