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a <br /> GETTLER - RYAN INC. <br /> s <br /> March 20, 200 i <br /> G-R Job#386845 <br /> Mr. Robert Cochran <br /> Chevron Products Company <br /> P.O. Box 6004 <br /> San Ramon, CA 94583 <br /> RE: First Quarter Event of March 2,2001 <br /> Groundwater Monitoring & Sampling Report <br /> Chevron Service Station #9-4275 <br /> 2905 West Benjamin Holt Drive <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). A joint monitoring event was conducted with Arco <br /> Station #2133 located at 2908 West Benjamin Holt Drive, Stockton, California. The joint monitoring data is <br /> not included in this report. <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 laboratory <br /> analytical report are also attached. <br /> Please call if you have any questions or comments regarding this report. Thank you. <br /> SM�� <br /> D G 0 <br /> J. <br /> Deanna L. Harding <br /> Project Coordinator y <br /> 3W.5V7 <br /> Stephen J. Carter <br /> Senior Geologist, R.G. o. 5577 OF CAL,�OQ� <br /> Figure 1: Potentiometric Map <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: Dissolved Oxygen Concentrations <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 ) 55.1 - 7555 <br />