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OJUGETTLER - RYAN INC. <br /> October 19, 2000 <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 August 3,2000 <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 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 <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 /> Si erely, <br /> H�ard QOFfcSS104, <br /> na <br /> Project Coordinator �Q�O COQ ICEIi0 1'_ <br /> m <br /> c' No C 55734 T" <br /> Hao 44 <br /> Kevork "' <br /> P No C55734 d Exp <br /> ti►r <br /> Figure 1 Potentiometric Map <br /> Figure 2 Concentration Map TF DF C <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 /> 0 <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925 ) 551 - 7555 <br />