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6ETTLER - RYAN INC <br /> July 19, 2006 <br /> G-R Job#386843 <br /> Ms. Stephanie Frugal <br /> Chevron Environmental Management Company <br /> P.O. Box 6012, Room K2240 <br /> San Ramon, CA 94583 <br /> RE: Second Quarter Event of June 15, 2006 <br /> Groundwater Monitoring&Sampling Report <br /> Former Chevron Service Station#9-0557 <br /> 139 South Center Street <br /> Stockton,California <br /> Dear Ms.Furgal: <br />' This report documents the most recent groundwater monitoring and sampling event performed by Gettler-Ryan <br /> Inc. (G-R) at the referenced site. All field work was conducted in accordance with G-R. Standard Operating <br /> Procedure-Groundwater Sampling(attached). <br />' Static groundwater levels were treasured 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 I. A Potentiometric Map is included as Figure 1. <br />' . Groundwater samples were collected from the monitoring wells and submitted to a state certified laboratory 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. <br /> Please call if you have any questions or comments regarding this report. Thank you. <br />' Sincerely, <br /> i <br /> icanna L. Harding 1 �ca�aN GAO <br /> Project Coordinator rci g A• Z. <br /> • �No.7504 <br /> N� 4 <br /> o ert A. auritae <br /> ' Senior Geologist, G. No. 7504 OPCAI.� p <br /> Figure 1: Potentiontetric Map <br /> Figure 2: Concentration Map <br /> ruble i: Groundwater Monitoring Data and Analytival Results <br /> Table 2: 01.0 Undwater Analytical Results -Oxygenate Compounds <br /> Table 3: GfOffltdwater Analytical Results <br /> Att,k hment%. Standard Operating Procedure-Groundwater Sampling <br /> Field lulu Sheets <br /> Chain of C.'ust€>d% Document and Lahorator} Aflalyflcal Wports <br /> • <br /> ' <br /> 6 747 Sierra Court , Suite J Dublin , California 94568 ( 925) 551 - 7555 <br /> 1 <br />