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� GETTLER - RYAN INc. <br /> September 13. 2004 <br /> G-R Job 4386843 <br /> Mr Robert Cochran <br /> ChevronTexaco Company <br /> P O Box 6012 Room K2200 <br /> San Ramon CA 94583 <br /> RE Third Quarter Event of August 12 and 13,2004 <br /> Groundwater Monitoring & Sampling Report <br /> Former Chevron Service Station #9-0557 <br /> 139 South Center Street <br /> Stockton California <br /> Dear Mr Cochran <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 l A Potentiometric Map is included as Figure l <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 /> Sincerelv <br /> Q?OFESS/pr <br /> Deanna L Ham rdi `C Qti�GOp Kt<•'y��c' <br /> Project Coordinator O F <br /> No C 5573 M <br /> * Exp C (� <br /> Hagop Kevork cn 1 <br /> P E No C55734 �"9T�. Civil- <br /> Figure 1 Potentiometric Map <br /> OF GAL�f <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater AnaNtical Results-Oxygenate Compounds <br /> Table 3 Groundwater Analytical Results <br /> Attachments Standard Operating Procedure -Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custod. Document and Laboratory Analviical 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, CA 94954 • (707) 789-3255 • Fax (707) 789-3218 <br />