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t <br /> 6 E RYA � I <br /> ERN IAC. <br /> i <br /> March 17, 2003 <br /> G-R Job #386847 <br /> Mr Robert Cochran <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583 <br /> i <br /> RE First Quarter Event of February 12, 2003 <br /> Groundwater Monitoring & Sampling Report <br /> Chevron Service Station #9-2033 <br /> 508 West Charter Way <br /> Stockton, 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) A joint monitoring event was conducted with BP, <br /> located at 620 West Charter Way, Former Texaco, located at 440 West Charter Way and Arco#2168, located <br /> on West Charter Way, Stockton, California Joint monitoring data is not included in the report <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 /> r <br /> Please call if you have any questions or comments regarding this report Thank you <br /> Sin r y, <br /> Deanna L Harding R GF <br /> Project Coordinator <br /> Cr No 7285 <br /> Robert C Mallory Exp 01AQ. <br /> Registered Geologist No 7285 d'q <br /> Figure l Potentiometnc Map <br /> �4F CAS-�E� <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <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 i a Dublin , California 94568 ( 925 } 551 - 7555 <br />