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r — <br /> a <br /> GETTLER - RYAN INC. <br /> July 5, 2000 <br /> G-R Job#180198 <br /> Mr Edward C Ralston <br /> Tosco Marketing Company <br /> 1380 Lead Hill Road, Suite 120 <br /> Roseville, California 95661 <br /> RE Second Quarter 2000 Groundwater Monitoring & Sampling Report <br /> Tosco (Circle K) Unit#08671 <br /> 8606 Thornton Road <br /> Stockton, California <br /> Dear Mr Ralston <br /> This report documents the quarterly groundwater monitoring and sampling event performed by Gettler-Ryan <br /> Inc (G-R) On May 1, 2000, field personnel monitored and sampled four wells (MW-1 through MW-4) at the <br /> above referenced site <br /> Static groundwater levels were measured and all wells were checked for the presence of separate-phase <br /> hydrocarbons Separate-phase hydrocarbons were not present in the wells Static water level data and <br /> . groundwater elevations are summarized in Table 1 A Potentiometric Map is included as Figure 1 <br /> Groundwater samples were collected from the monitoring wells as specified by G-R Standard Operating <br /> Procedure - Groundwater Sampling (attached) The field data sheets are also attached The samples were <br /> analyzed by Sequoia Analytical Analytical results are summarized in Tables 1 and 2 A Concentration Map <br /> is included as Figure 2 The chain of custody document and laboratory analytical reports are also attached <br /> Sincerely, <br /> J0.3`c D GE <br /> Deanna L Harding �G`o�G 5 J <br /> rTct Coordinator p F <br /> No 6882 <br /> �Er � <br /> Dou as Zee <br /> Senior Geologist, R G No 6882 OF CA1-�F <br /> Figure 1 Potentiometnc Map <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results -Oxygenate Compounds <br /> Attachments Standard Operating Procedure -Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 08671 qml <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />