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6ETTLER - RYANINC. <br /> • <br /> September 6, 2002 <br /> G-R Job#180183 <br /> Mr Edward C Ralston <br /> Phillips 66 Company <br /> 1380 Lead lIill Road, Suite 120 <br /> Roseville, California 95661 <br /> RE: Third Quarter Event of July 29, 2002 <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 with 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 1 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 /> Sincerely, <br /> 1) IS 0`D <br /> canna �Hardi y �,�N J Cq9"�'/J,� <br /> Protect Coordinator F <br /> � Na. 5577 <br /> ljt�4 <br /> Stephen J Carter ��k_ 2� <br /> Senior Geologist,R G No 5577 FOF CAL�FOQ� <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 /> 0120.yml <br /> 0 <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />