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Page 2 <br /> .Is. 41ary l'leays <br /> October 9, 1991 <br /> ied at the site were transfered to Sequoia Analytical, <br /> W Water samplesain of At the laboratory, the samples <br /> Concord, California undeocthe fo lowing est procedures: <br /> were analyzed according <br /> • Total Petroleum Hydrocarbons as Gasoline--EPA Method 8015 M; <br /> Benzene, Toluene, Ethylbenzenes and Xylenes(BTE&X) -- EPA Method <br /> • 8020; <br /> Organic Lead--DHS Specified Method; and <br /> • EDB--D145 Specified Method. <br /> arized in Table 2. <br /> The findings from the laboratory testing are atm hed QA/QC procedures <br /> Laboratory reports and chain of custod le labeled MW-100 from well MW-3, <br /> consisted o£collecting a duplicate sample travel blank. Analyses of the <br /> collecting a field blank, and including zed for were <br /> duplicate and sample blanks indicated all constituents analy <br /> below detection limits. e t the laboratory, standard internal Q�QC <br /> procedures were follow <br /> (Figure <br /> Plotting and contouring ground water level contours 1) indicate a <br /> be due to the <br /> flow direction t hvaed the <br /> changesin flow direc�ionomayirections were <br /> toward the southwest, <br /> influence of tidally induced water level changes in the adjacent Stockton <br /> deep water channel. <br /> Of <br /> The laboratory findings generally indicate a decrees concentration <br /> cof organic lead <br /> petroleum and petroleum related compounds. The presence ly. EDB was <br /> or war,it <br /> was ynot zed for in detected <br /> third quarterin this quarter ,but was not <br /> analyze <br />