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Oki 6ETTLER - RYAN INC. <br /> August 20, 2003 <br /> G-R Job#386854 <br /> Mr Robert Cochran <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583 <br /> RE: Third Quarter Event of July 28, 2003 <br /> Groundwater Monitoring & Sampling Report <br /> Chevron Service Station#9-8264 <br /> 3775 Tracy Boulevard <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 scheduled, but not <br /> conducted on the same date, with Shell Service Station, located at 3725 South Tracy Boulevard, Tracy, <br /> California <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 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 /> Deanna L Harding <br /> ProJec oordinator <br /> C `raj► <br /> o � <br /> Robert C Mallory No 7285 <br /> Registered Geologist No 7285 ExpFigure i Potentiometnc Map OF <br /> g CA <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results <br /> Table 3 Groundwater Analytical Results <br /> Table 4 Joint Groundwater Monitoring Data- Shell <br /> IsAttachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court , Suite J a Dublin , California 94568 0 { 925 ) 551 - 7555 <br />