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6ETTLER - RYAN INC. <br /> • January lb, 2001 <br /> G-R Job#386845 <br /> Mr Robert Cochran <br /> Chevron Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583 <br /> RE Fourth Quarter Event of December 14, 2000 <br /> Groundwater Monitoring & Sampling Report <br /> Chevron Service Station #9-4275 <br /> 2905 West Benjamin Holt Drive <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 Arco <br /> Station #2133 located at 2908 West Benjamin Holt Drive, Stockton, California The joint monitoring data is <br /> not included in this 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 /> Please call if you have any questions or comments regarding this report Thank you <br /> De <br /> rely, <br /> ' Q�i3fESS10N <br /> , 4, 11 o K <br /> a L Harding i ���' C?QP ALO <`' <br /> Project Coordinator <br /> No C 5573 M <br /> i Exp <br /> Hagop Kevork * i` <br /> PE No C55734 `P_V CIV11. <br /> Figure 1 Potentiometric Map F OF 0 Al SFO <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results—Oxygenate Compounds <br /> Table 3 Dissolved Oxygen Concentrations <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 />