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`yll <br /> GETTLER - RYAN INC. <br /> February 10, 2005 <br /> G-R Job #386463 <br /> Mr RobertCochian <br /> ChevronTexaco Company <br /> P O Box 6012, Room K2200 <br /> San Ramon, CA 9483 <br /> RE First Quarter Event of January 6,2005 <br /> Groundwater Monitoring& Sampling Report <br /> Chevron Service Station #9-3232 <br /> 8660 Lower Sacramento Road <br /> Stockton, California <br /> Dear Mr Cochran <br /> This report documents the most recent groundwater monitoring and sampling events 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) <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 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 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 /> eanna L Harding �5 ( A• C? <br /> Project Coordinator <br /> ( No 7504 <br /> 9 <br /> P Laui itzen ypF GA��F4� <br /> Senior Geologist, R No 7504 <br /> Figure 1 Potentiometric 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 /> 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 Susie B2 • Petaluma CA 94954 • (707) 789 3255 • Fax (707) 789 3218 <br />