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4 <br /> 6ETTLER - RYAN INC. <br /> • June 21, 2002 <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 and 25,2002 and <br /> May 14,2002 <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 well development and the most recent groundwater monitoring and sampling events <br /> performed by Gettler-Ryan Inc (G-R) at the referenced site All field work was conducted in accordance with <br /> G-R Standard 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 I <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 /> Sincerely, <br /> h6A <br /> Deanna L Harding COI p <br /> Project CoordinatorVi�� <br /> No 6882 <br /> W,enior\6 <br /> Lee <br /> logist, R G No6882 <br /> Figure 1 Potentiometric Map ATF OF CAI.���¢ <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 /> 6747 Sierra Court , Suite J • Dublin , California 94568 { 925 } 551 - 7555 <br />