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091 GETTLER - RYAN INC. <br /> May 30, 2003 <br /> G-R Job#386463 <br /> Mr Robert Cochran <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583 <br /> RE: Second Quarter Event of April 24,2003 <br /> Groundwater Monitoring & Sampling Report <br /> Chevron Service Station#9-3232 <br /> 8660 Lower Sacramento Road <br /> Stockton,California <br /> Dear Mr Cochran <br /> This report documents the most recent groundwater monitoring and sampling events performed by Gettler-Ryan <br /> Inc (G-R) at the referenced site All field work was conducted in accordance with G-R Standard Operating <br /> 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 for <br /> analyses The field data sheets for this event are attached Analytical results are presented in the table(s) listed <br /> below A Concentration Map is included as Figure 2 The chain of custody document and laboratory analytical <br /> report are also attached <br /> Please call if you have any questions or comments regarding this report Thank you <br /> S ncerely, <br /> Deanna L Harding <br /> Project Coordinator <br /> A <br /> Robert C Mallory <br /> * � o7285 <br /> Registered Geologist No 7285 IPS Expo a <br /> Figure 1 Potentiometric Map if OFCA1.�F� <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 />