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-- <br /> ETTLER <br /> RYA N INC. <br /> November 29, 2005 <br /> G-R Job#386846 <br /> Mr Dana Thurman <br /> ChevronTexaco Company <br /> P O Box 60I2, Room K2236 <br /> San Ramon, CA 94583 <br /> RE Fourth Quarter Event of October 27,2005 <br /> Groundwater Monitoring& Sampling Report <br /> Chevron Service Station 49-9840 <br /> 4344 Waterloo Road <br /> Stockton, California <br /> Dear Mr Thurman <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 A Potentiometric Map is included as Figure 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 A Concentration Map is included as Figure 2 The chain of custody document and laboratory <br /> analytical report are also attached <br /> Please call if you have any questions or comments regarding this report Thank you <br /> 4Since , <br /> ` at <br /> Oh1AL O'FL Harding 55 Oz <br /> Project Coordinator O �li,9�0 <br /> ir <br /> �Na.7504 <br /> goiefAauritzen <br /> Senior Geologist, P No 7504 FOF CAL�FO <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 /> 1164 N McDowell Blvd Suite B2 - Petaluma GA 94954 0 (707) 789 3255 • Fax (707) 789 3218 <br />