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6ETTLER - RYAN INC. 1 <br /> November 21, 2{}42 <br />' Mr Robert Cochran G-R Job#386392 <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 #9-1848 <br /> 1257 Yosenute Avenue <br /> Manteca, California <br /> Dear Mr Cochran <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 /> Sincerely, <br /> C in Ge �-/ _SGC <br /> r ,rot <br /> Deanna L Harding <br /> Project Coordinator ,� ED GE0, <br /> * No 7285 <br /> Robert C Mallory Ex 01 <br /> Registered Geologist,No 7285 CPA <br /> p, C�Y <br /> Figure 1 Potentiometric MapQC <br /> Figure 2 Concentration Map <br /> Table I 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 , California 94568 (925) 551 - 7555 <br />