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n. o <br /> 4F] 6ETTLER - RYAN INc. <br /> November 20, 2002 <br /> G-R Job#386844 <br /> Mr Robert Cochran <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583 <br /> RE: Fourth Quarter Event of October 18,2002 <br /> Groundwater Monitoring& Sampling Report <br /> Chevron Service Station#9-6258 <br /> 2409 East Main at F 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 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, <br /> —Foe- ��RED GFa <br /> Deanna L Harding �5 0 <br /> Project Coordinator �tU�� -t C o0.-,� <br /> ylr a No 7285 <br /> Exp <br /> Robert C Mallory 4 <br /> Registered Geologist,No 7285 0F CA., <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 <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> • <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925 } 551 - 7555 <br />