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GETTLER - RYAN INC. <br /> March I5, 2001 <br /> Mr Robert Cochran <br /> G-R Job#386392 <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583 <br /> RE: First Quarter Event of February 21, 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 <br /> (if any) are presented in the attached Table I A Potentiometnc Map is included as Figure I <br /> Groundwater samples were collected from the monitoring wells and submitted to a state certified <br /> laboratory for analyses The field data sheets for this event are attached Analytical results are presented <br /> to the table(s) listed below A Concentration Map is included as Figure 2 The chain of custody <br /> document and laboratory analytical report are also attached <br /> Please call if you have any questions or comments regarding this report Thank you <br /> S cerely, <br /> �ERED GFOI <br /> OC10;3 <br /> � <br /> eanna L Harding «.� � � <br /> Pro,1e t Coordinator <br /> 0.5577 <br /> CP <br /> Stephen J C er `< <br /> Senior Geologist, R G No 5577 OF CAL�FO�� <br /> Figure 1 Potentiometnc Map <br /> Figure 2 Concentration Map <br /> Table I 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 /> • <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925 ) 551 -7555 <br />