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• <br /> 6ETTLEE <br /> RYAN INC. <br /> June 14, 2006 <br /> G-R Job#386847 <br /> Ms Stephanie Purgal <br /> Chevron Environmental Management Company <br /> P O Box 6012, Room K2240 <br /> San Ramon,CA 94583 <br /> RE: Second Quarter Event of May 8,2006 <br /> Groundwater Monitoring& Sampling Report <br /> Chevron Service Station#9-2033 <br /> 508 West Charter Way <br /> Stockton, California <br /> Dear Ms Furga) <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) A point monitoring event was conducted with BP, <br /> located at 620 West Charter Way, Former Texaco, located at 440 West Chatter Way, and with Arco #2168, <br /> located on West Charter Way,Stockton,California Joint monitoring data is not included in the report <br /> Static groundwater levels were measured and the wells were checked for the presence of separate-phase <br /> hydrocarbons Static water level data, groundwater elevations, and separate-phase hydrocarbon thickness (if <br /> any) are presented in the attached Table 1 A Potentiometric Map is included as Figure l <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 report are also attached <br /> Please call if you have any questions or comments regarding this report Thank you <br />' Sincerely, <br /> �O <br /> �pNAL <br /> anna L Harding �a5 SCC <br /> Protect Coordinator <br />' N CJ3 <br /> N0.7604 <br /> Robert L.aurttze � <br /> Senior Geologist, G No 7504 SCF CAi <br /> Figure I Potentiometm,Map <br /> ]Figure 2 Concentration Map <br />' Table I Groundwater Monitoring Data and Analytical Results <br /> Table 2 Field Measurements <br /> Table 3 Groundwater Analytical Results-Oxygenate Compounds <br />' Table 4 Groundwater Am lytic.al Result, <br /> Attaihment4 Standard Operating Procedure Groundwater Sampling <br /> rield Data Sheets <br /> . Chain of Custody Dcnument and Laboratory Analytii-al Reports <br />' 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925) 551 -7555 <br /> 1 <br />