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1 <br /> GETTLER - RYAff INC. <br /> May 28, 2002 <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: Second Quarter Event of April 18, 2002 <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 conducted with Shell <br /> Service Station located at 3725 South Tracy Boulevard, Tracy,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 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 /> S• erely, <br /> D Geo <br /> Deanna L. Harding ��`� AS <br /> )Dcou <br /> ct oordinator <br /> No.-6882 <br /> gI s J. ee <br /> Senior Geo ogist, R.G.No. 6882 <br /> ATF <br /> Figure 1: Potentiometric Map OF CA1 <br /> Figure 2: Concentration Map <br /> Table 1: Groundwater Monitoring Data and Analytical Results- <br /> Table <br /> esultsTable 2: Groundwater Analytical Results <br /> Table 3: Groundwater Analytical Results <br /> Table 4: Joint Groundwater Monitoring Data- Shell <br /> Attachments: Standard-Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 67.47 Sierra Court , . Suite J Dublin , California 94568 ( 92 5 ) 55.1 - 7555 <br />