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6ETTLER - RYAN INC. <br /> August 2, 2001 <br /> G-R Job #386392 <br /> Mr Robert Cochran <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583 <br /> RE Third Quarter Event of July 12,2001 <br /> Groundwater Monitoring& Sampling Report <br /> Chevron Service Station #9-1848 <br /> 1257 Yosemite Avenue <br /> Manteca,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 I A Potentiometnc 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 /> Sinc ely, /Xk <br /> Deanna L Harding �p 0? KEV ! <br /> Project Coordinator <br /> 01 <br /> LU No C 55734 <br /> W14 <br /> Hagop Kevork * Exp <br /> P E No C55734 CIV11_ <br /> Figure I Potentiometric Map F OF 0 �l� i' <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 />