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GETTLER - RYAN <br /> ig INC. <br /> December 7, 2005 <br /> G-R Job #386855 <br /> Mr Darin Rouse <br /> ChevronTexaco Company <br /> P O Box 6012, Room K2260 <br /> San Ramon,CA 94583 <br /> RE: Fourth Quarter Event of October 28,2005 <br /> Groundwater Monitoring& Sampling Report <br /> Former Chevron Service Station#9-8632 <br /> 575 Grant Line Road <br /> Tracy, California <br /> Dear Mr Rouse <br /> This report documents the most recent groundwater monitoring and sampling event performed by Gettler-Ryan <br /> Inc (G-R) at the referenced site All field work was conducted in accordance with G-R Standard Operating <br /> Procedure - Groundwater Sampling (attached) A Joint groundwater monitoring event was conducted with <br /> Tosco (Former BP Oil) Service Station #11194, located at 2375 Tracy Boulevard and with Unocal (Former <br /> Scotty's) Service Station, located at 574 West Grant Line Road, Tracy, California <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 l Joint groundwater monitoring data is presented in Tables 3 and 4 A <br /> Potentiometrc 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 <br /> below A Concentration Map is included as Figure 2 The chain of custody document and laboratory analytical <br /> report are also attached <br /> Please call if you have any questions or comments regarding this report Thank you <br /> Sincerely, <br /> Deanna LbHarding �OPArLC'-,p� <br /> Protect CoordinatorQ'� <br /> a � N <br /> • No.7504 <br /> &qeA4au itzen 9 Q� <br /> Senior Geologist, P G o 7504 QF CALV�O <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 <br /> • Table 3 Joint Groundwater Monitoring Data-Tosco(Former BP Oil) <br /> Table 4 Joint Groundwater Monitoring Data-Unocal(Former Scotty's) <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court, Suite J • Dublin, CA 94568 • (925) 551-7555 Fax (925) 551-7888 <br /> 3140 Gol64 NCMcDowDrive, <br /> ell Blvd teSu Su170 iRancho Cordova, CA te a Petaluma, CA 94954 67( 707) 789-325530Fax (707) 789-32181317 <br /> r <br />