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• <br />• <br />6ETTLER-RYAN INC. <br />December 20, 2000 <br />G -R Job #386408 <br />Mr Robert Cochran <br />Chevron Products Company <br />P O Box 6004 <br />San Ramon, CA 94583 <br />RE: Fourth Quarter Events of October 16, 17 and 19, 2000 <br />Special Events of November 29, and December 8, 2000 <br />Groundwater Monitoring & Sampling Report <br />Former Chevron Service Station #9-5775 <br />301 West Kettleman Lane <br />Lodi, California <br />Dear Mr Cochran <br />This report documents the most recent groundwater monitonng and sampling event(s) 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 i Potentiometric Maps are included as Figures 1 and 2 <br />Groundwater samples were collected from the monitoring wells and submitted to a state certified laboratory <br />for analyses The field data sheets for all events are attached Analytical results are presented in the table(s) <br />listed below Isoconcentration/Concentration Maps are included as Figures 3 through 8 The chain of custody <br />documents and laboratory analytical reports are also attached <br />Please call if you have any questions or comments regarding this report Thank you <br />i erely, <br />r <br />Deanna L. Harding <br />Project Coordinator <br />Stephen J Carter <br />Senior Geologist, R G N <br />Figure t <br />Figure 2 <br />Figure 3 <br />Figure 4 <br />Figure 5 <br />Figure 6 <br />Figure 7 <br />. Figure 8 <br />Table 1 <br />Table 2 <br />Attachments <br />Potentiometric Map — Shallow Wellg'----' <br />Potentiometnc Map — Deep Wells <br />TPH-G Isoconcentration Map — Shallow Wells <br />TPH-G Concentration Map — Deep Wells <br />Benzene Isoconcentration Map — Shallow Wells <br />Benzene Concentration Map — Deep Wells <br />MTBE Isoconcentration Map — Shallow Wells <br />MTBE Concentration Map — Deep Wells <br />Groundwater Monitoring Data and Analytical Results <br />Groundwater Analytical Results - Oxygenate Compounds <br />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 • <br />(925) 551 -7555 <br />