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GETTLER - RYAN INC. <br /> May 8, 2001 <br /> Mr Robert Cochran G-R Job#386844 <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon,CA 94583 <br /> RE: Second Quarter Event of April 12,2001 <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- <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 and 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 /> U."', <br /> l• <br /> Deanna L Harding ACU Geg <br /> Project Coordinator <br /> No 6882 <br /> MD9ouasLee <br /> Senior Geologist, R G No 6882 cP <br /> Figure 1 Potentiometric Map �9TFGF CAI.�F���` <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 Report, <br /> • <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />