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• <br /> 6 E - RYAN NC. <br /> March 8, 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 First Quarter 2000 Groundwater Monitoring& Sampling Report <br /> Tosco (Circle K)Umt#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-RyanInc <br /> (G-R) On February 7, 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 Potentiometnc 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 is <br /> included as Figure 2 The chain of custody document and laboratory analytical reports are also attached <br /> Sincerely, <br /> .D GAO <br /> Deanna L Harding Pp,A Sl CQ <br /> Protect Coordinator 4v <br /> 'No. 8676 <br /> Barbara Sieminski <br /> Project Geologist,R G No 6676 9 aF <br /> Figure 1 Potentiometric 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 q[W <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />