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N INC. <br /> 4ig GETTLER - RYA <br /> March 1,2006 <br /> G-R Job#386846 <br /> Mr Dana Thurman <br /> Chevron Environmental Management Company <br /> P O Box 6012,Room K2236 <br /> San Ramon, CA 94583 <br /> RE. First Quarter Event of January 27, 2006 <br /> Groundwater Monitoring & Sampling Report <br /> Chevron Service Station#9-9840 <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 Potentiometnc 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 /> Sincerely, <br /> Deanna L Harding r ���pNAL GFO\ <br /> Project Coordinator <br /> Q.� P+ �� <br /> �3 N Cn <br /> tNa 7504 zRobert A LauritzeSenior Geologist, P7504 F pQ` <br /> OF GAL\F <br /> Figure 1 Potentiometnc 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 - Ranctio 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 />