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�L <br /> (f, <br /> 6ETTLER - RYAN INC. <br /> August 26, 2003 <br /> G-R Job#180183 <br /> Mr Edward C Ralston <br /> ConocoPhilhps <br /> 76 Broadway Avenue <br /> Sacramento, California 95818 <br /> RE. Third Quarter Event of July 25, 2003 <br /> Groundwater Monitoring& Sampling Report <br /> Tosco(Circle K) Unit#01205 <br /> 16470 Cambridge Street <br /> Lathrop, California <br /> Dear Mr Ralston <br /> This report documents the most recent groundwater monitoring and sampling event performed by Gettler- <br /> Ryan Inc (G-R) at the referenced site All field work was conducted in accordance wish G-R Standard <br /> Operating Procedure -Groundwater Sampling (attached) <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 i A Potentiometric Map is included as Figure 1 <br /> Groundwater samples were collected from the monitoring wells and submitted to a state certified laboratory <br /> for analyses The field data sheets for this event are attached Analytical results are presented in the table(s) <br /> listed below A Concentration Map is included as Figure 2 The chain of custody document and laboratory <br /> analytical reports are also attached <br /> aerely, <br /> p, R <br /> Deanna L Harding - <br /> Proi ect Coordinator <br /> 01UP <br /> No 7285 <br /> Robert C Mallory Exp Oilp <br /> Registered Geologist, No 7285 <br /> Figure 1 Potentiometnc Map <br /> OFCAi.�F <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 /> Chairs of Custody Document and Laboratory Analytical Reports <br /> 01205 qmt <br /> 0 <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />