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4i!] GETTLER - RYAN INC. <br /> July 21, 2005 <br /> G-R Job #386843 <br /> Mr Darin Rouse <br /> ChevronTexaco Company <br /> P O Box 6012, Room K2260 <br /> San Ramon, CA 94583 <br /> RE Second Quarter Event of.tune 17,2005 <br /> Groundwater Monitoring& Sampling Report <br /> Former Chevron Service Station #9-0557 <br /> 139 South Center Street <br /> Stockton, 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) <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 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, t <br /> &aAk <br /> Deanna L Harding �1p4+lAL Gee <br /> Project Coordinator O 5�� A. LQ(j�01� <br /> a 4 to <br /> NO 7504 <br /> Robert A Lauritzen tl <br /> Senior Geologist, P G No 7504 t�`�F CAL�Fp <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 /> . Table 3 Groundwater Analytical Results <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 , Suite B2 • Petaluma, GA 94954 • (707) 789-3255 • Fax (707) 789-3218 <br />