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ETTLER - RYA N INC. <br /> • June 4,2003 <br /> G-R Job #386855 <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 30, 2003 <br /> Groundwater Monitoring& Sampling Report <br /> Former Chevron Service Station#9-8632 <br /> 575 Grant Line Road <br /> Tracy, California <br /> Dear Mr Cochran <br /> This report documents the most recent groundwater monitoring and sampling event 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) A joint groundwater monitoring event was conducted with <br /> Tosco (Former BP Oil) Service Station #11194, located at 2375 Tracy Boulevard and Unocal (Former Scotty's) <br /> Service Station, located at 574 West Grant Line Road, Tracy, California <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 Joint groundwater monitoring data is presented in Tables 3 and 4 A <br /> 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 /> Sincerely, <br /> Deanna L Harding <br /> Project Coordinator c�'� EC 1EGf�Ei���C <br /> * Na <br /> Obert C Mallory d, Exp Ol 0 Q. <br /> Registered Geologist,No 7285 q �a <br /> �OF CA4�F0 <br /> Figure 1 Potentiometric Map <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results <br /> • Table 3 Joint Groundwater Monitoring Data -Tosco(Former BP Oil) <br /> Table 4 Joint Groundwater Monitoring Data -Unocal (Former Scotty's) <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 />