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6ETTLER - RYAN4F] INC. <br /> August 3, 2001 <br /> G-R Job#386843 <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 16,2001 <br /> Groundwater Monitoring & Sampling Report <br /> Chevron Service Station #9-0557 <br /> 139 South Center 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. A Concentration Map is included as Figure 2. The chain of custody document and Iaboratory <br /> analytical report are also attached. <br /> Please call if you have any questions or comments regarding this report. Thank you. <br /> Sincerely, <br /> �Z..oa-csa0e <br /> — Fae— ZED GE <br /> Deanna L. Harding S J.�0 <br /> Pro'ect Coordinator mak'QOM c�i'J, <br /> No. 6882 <br /> Dou s Lee <br /> Senio Geologist, R.G. No. 6882 `r�qJ <br /> Figure l: Potentiometric Map FOF CA <br /> Figure 2: Concentration Map <br /> Table 1: Groundwater Monitoring Data and Analytical Results <br /> Table 2: Groundwater Analytical Results-Oxygenate Compounds <br /> Table 3: Groundwater Analytical Results <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 />