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6 <br /> ETTLER - RYAN INC. <br /> } March 25, 2002 <br /> M G-R Job#386582 <br /> Mt.Robert Cochran <br /> Chevron Products Company <br /> P.O.Box 6004 <br /> San Ramon,CA 94583 E <br /> RE: First Quarter Event of February 21,2002 <br /> Groundwater Monitoring&Sampling Report <br /> Chevron Service Station#9-1452 <br /> I 334 East Main Street <br /> k. Ripon,California <br /> Dear Mr. Cochran: <br /> { This report documents the well development and the most recent groundwater monitoring and sampling event <br /> performed by Gettler-Ryan Inc. (G-R) at the referenced site. All field work was conducted in accordance,with <br /> G-R Standard Operating Procedure-Groundwater Sampling(attached). <br /> E 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 laborato''ry for . <br /> analyses. The field data sheets for this event are attached. Analytical results are presented in the table(s) listed <br /> below. A Concentration Map is included as Figure 2. The chain of custody document and laboratory analytical <br /> �. report are also attached. `I <br /> Please.call if you have any questions or comments regarding this report. Thank you. <br /> Sincerely, s <br /> IF. <br /> &na . Harding <br /> 4 Project Coordinator <br /> No. SM <br /> � <br /> Dou s ee <br /> { Senior,Geo ogist,R.G. No.6882 'x ~ <br /> i <br /> Figure 1: Potentiometric Map lF OF C AG\� j <br /> Figure 2: Concentration Map ! ;, <br /> Table 1: Groundwater Monitoring Data and Analytical Results 3 ;! <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 /> 1, <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 ) 551;-75155 <br />