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43 6ETTLER - RYAN <br /> INC. <br /> March 6, 2006 <br /> G-R.Job#386463 <br /> Mr Dann Rouse <br /> Chevron Environmental Management Company <br /> P O Box 6012,Room K2260 <br /> San Ramon, CA 94583 <br /> RE: First Quarter Event of January 26, 2006 <br /> Groundwater Monitoring& Sampling Report <br /> Chevron Service Station#9-3232 <br /> 8660 Lower Sacramento Road <br /> Stockton, California <br /> Dear Mr Rouse <br /> This report documents the most recent groundwater monitoring and sampling events 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 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 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 /> Si erely, <br /> ,ANAL <br /> Deanna I, Harding 55 0 <br /> Project Coordinator �k� P p <br /> cc <br /> a W-No 7504 ' ; <br /> 0 Q <br /> Ro ertA I,auntztGNo <br /> '9r� OQ� <br /> Senior Geologist, 7504 O�CA%-�F <br /> Figure 1 Potentiornetric Map <br /> Figure 2 Concentration Map <br /> Table I Groundwater Monitonng 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, CA 94568 - (925) 551-7555 - Fax (925) 551-7888 <br /> 3140 Gold Camp Drive, Suite 170 - Rancho Cordova, CA 95670 - (916) 631-1300 - Fax (916) 631-1317 <br /> 1364 N McDowell Blvd , Suite B2 - Petaluma, GA 94954 - (707) 789-3255 - Fax (707) 789-3216 <br />