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6ETTLER - RYAN INC. <br /> August 27,2004 <br /> G-R Job #386855 <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 July 30,2004 <br /> Groundwater Monitoring & Sampling Report <br /> Former Chevron Service Station #9-8632 <br /> 575 Grant Line Road <br /> Tracy, 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) A joint groundwater monitoring event was conducted with <br /> Tosco (Former BP Oil) Service Station #11194, located at 2375 Tracy Boulevard, Tracy, California A Joint <br /> monitoring event was conducted with Unocal (Former Scotty's) Service Station, located at 574 West Grant Line <br /> Road,Tracy, California, however, data was not provided <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 Joint groundwater monitoring data is presented in Tables 3 and 4 A <br /> Potentiometric Map is included as Figure I <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 /> — <br /> e Po,, - ��� pP KE�Y'�! <br /> Deanna L Harding �<c, QCa O e, <br /> Project Coordinator v, <br /> co <br /> LU NO C 55734 rn <br /> Ex <br /> Hagop Ke),ork (P P <br /> P E No C55734 �9�F CML ��\Q <br /> Figure 1 Potentiometric Map OF C AOS <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results <br /> Table 3 Joint Groundwater Monitoring Data-Tosco(Former BP Oil) <br /> Table 4 Joint Groundwater Monitoring Data- Unocal(Former Scotty's) <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, CA 94954 • (707) 789-3255 • Fax (707) 789-3218 <br />