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6ETTLER - RYANINC. <br /> September 15, 2003 <br /> G-R Job #180198 <br /> Page 1 of 2 <br /> Mr Edward C Ralston <br /> ConocoPhillips <br /> 76 Broadway Avenue <br /> Sacramento, California 95818 <br /> RE: Third Quarter Event of August 13,2003 <br /> 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 most recent groundwater monitoring and sampling event performed by Gettler-Ryan Inc <br /> (G-R)at the referenced site All field work was conducted in accordance with G-R Standard Operating Procedure - <br /> Groundwater Sampling(attached) <br /> Static groundwater levels were measured and all wells were checked for the presence of separate-phase hydrocarbons <br /> Separate-phase hydrocarbons were not present in the wells Static water level data and groundwater elevations are <br /> summarized in Table 1 Joint groundwater monitoring and analytical data are presented in Table 3 A Potentiometric <br /> Map is included as Figure 1 <br /> Groundwater samples were collected from the monitoring wells and submitted to a state certified laboratory for <br /> analyses The field data sheets for this event are attached Analytical results are presented in the table(s)listed below <br /> A Concentration Map is included as Figure 2 The chain of custody document and laboratory analytical report are also <br /> attached <br /> Sincerely, <br /> Deanna L Harding <br /> Project oordinator EDCsF�, <br /> No <br /> Robert C Mallory E*. 0 <br /> Registered Geologist,No 7285 OFC <br /> 6747 Sierra Court, Suite J Dublin, CA 94568 (925) 551-7555 • Fax (925) 551-7888 <br /> 3140 Gold Camp Drive, Suite 170 • Rancho Cordova, CA 95670 • (916) 631-1300 • Fax (916) 631-1317 <br /> 1364 N McDowell Blvd , Suite B2 • Petaluma, CA 94954 • (707) 789-3255 • Fax (707) 789-3218 <br />