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owl <br /> 6ETTLER - RYAN INC. <br /> January 31, 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: Fourth Quarter Event of December 4,2000 <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 Ievel data, groundwater elevations, and separate-phase hydrocarbon thickness <br /> (if 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 <br /> laboratory for analyses. The field data sheets for this event are attached. Analytical results are presented <br /> in the table(s) listed below. A Concentration Map is included as Figure 2. The chain of custody <br /> document and laboratory analytical report are also attached. <br /> Please call if you have any questions or comments regarding this report. Thank you. <br /> ' cerely, <br /> �tED Gia ry <br /> Deanna L. Harding � �JG J ` :I N <br /> Pro,ect Coordinator 4 < <br /> No. 681,.; <br /> a 4,L <br /> Dou s <br /> Senio G logist, R.G. No. 6882 <br /> TF CA��`U <br /> Figure 1: Potentiometric Map OF <br /> Figure 2: Concentration Map <br /> Table 1: Groundwater Monitoring Data and Analytical Results <br /> Table 2: Groundwater Analytical Results—Oxygenate Compounds <br /> Attachments: Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> i <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551 - 7555 <br />