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rx. <br /> (eT <br /> ig ETTLER - YAN INC. <br /> August 26,2002 <br /> G-R Job#385854 <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 15,2002 <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 continents regarding this report. Thank you. <br /> Sin ly, <br /> i DFESS/10E0�9l <br /> Deanna L. Harding �p QR P <br /> Project Coordinator <br /> L No. C 55734LaRLWV <br /> m <br /> Hagop Kevork * Exp. <br /> P.E. No. C55734 (P <br /> �q CIVIL ��\P <br /> Figure 1: Potentiometric Map lF Op C pl-1F� <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 /> 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 />