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k j <br /> 6ETTLER - RYAN INC. <br /> June 18, 2001 <br /> G-R Job#386843 <br /> Mr. Robert Cochran <br /> Chevron Products Company <br /> P.O. Box 6004 <br /> San Ramon, CA 94583 <br /> RE: Second Quarter Event of May 16,2001 <br /> Groundwater Monitoring & Sampling Report <br /> Chevron Service Station #9-0557 <br /> 139 South Center Street <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). <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 ressults 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 /> S' erely, <br /> �Rpl_SS10�q <br /> Deanna L. Harding Q�c� �Op KeI,-�!F <br /> Project Coordinator <br /> Q� ," No. C 5573 (y <br /> * Exp.` ! <br /> Hagop Kevork �Q <br /> P.E. No. C55734 CP EXP. <br /> CIV <br /> Figure1: Potentiometric Map 9TF OF O4,L�F�� <br /> Figure 2: Concentration Map <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 /> 6747 Sierra Court Suite J Dublin California 94568 925 551 , 7555 <br />