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GETTLER - RYAN INC. <br /> May 24, 2006 <br /> GR.lob 4385121 <br /> Ms Stephanie Furgal <br />' Chevron Environmental Management Company <br /> P O Box 6012, Room K2240 <br /> San Ramon CA 94583 <br /> RE: Second Quarter Event of April 20,2006 <br /> Groundwater Monitoring&Sampling Report i <br /> Chevron Service Station 49-6171 <br /> 6633 Pacific Avenue <br /> Stockton,California <br /> Dear Ms Furgal <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 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 <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 The chain of custody document and laboratory analytical report are also attached <br /> Please call if you have any questions or comments regarding this report Thank you <br /> ISi rely <br /> I 1 <br /> eanna L Harding <br /> Project Coordinator <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analvtical Results-Oxygenate Compounds <br /> Table 3 Groundwater Analytical Results—TPH by GC-FID <br /> Table 4 Groundwater Analytical Results <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> I <br /> I <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 Suite 82 • Petaluma CA 94954 • (707) 789-3255 • Fax (707) 789 3218 <br />