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6ETTLER - RYAN INC. <br /> November 14, 2003 <br /> GR Job#385121 <br /> Mr. Robert Cochran <br /> Chevron Products Company <br /> P.O. Box 6004 <br /> San Ramon, CA 94583 <br /> RE: )Fourth Quarter Event of October 23 and 24, 2003 <br /> Groundwater Monitoring& Sampling Report <br /> Chevron Service Station#9-6171 <br /> 6633 Pacific Avenue <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 laboratory <br /> analytical report are also attached. <br /> Please call if you have any questions or comments regarding this report. Thank you. <br /> Sin ely, <br /> i <br /> Deanna L. Harding OFE55 <br /> Project Coordinator �� eOP KF-4/. <br /> CID <br /> UJ No. C 5573 MHagop Kevork <br /> P.E.No. C55734 �k <br /> Exp. <br /> m <br /> Figure 1: Potentiometric Map 9T clw- <br /> Figure 2: Concentration Map F OF 0 AI. v <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, CA 94568 • (925) 551-7555 • Fax (925) 551-7888 <br /> 3140 Gold Camp Drive, Suite 170 • Rancho Cordova, CA 95670 • (916) 631-1300 • Fax (916) 631-1317 <br /> 1364 N. McDowell Blvd., Suite B2 • Petaluma, CA 94954 • (707) 789-3255 • Fax (707) 789-3218 <br />