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0 i <br /> owl 6ETTLER - RYAN INC. <br /> December 15,2005 <br /> G-R.Job#386847 <br /> Mr Dann Rouse <br /> ChevronTexaco Company <br /> P O Box 6012,Room K2260 <br /> San Ramon, CA 94583 <br /> RE: Fourth Quarter Event of November 7, 2005 <br /> Groundwater Monitoring& Sampling Report <br /> Chevron Service Station#9-2033 <br /> 508 West Charter Way <br /> Stockton,California <br /> Dear Mr Rouse <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 BP, <br /> located at 620 West Charter Way, Former Texaco, located at 440 West Charter Way, and with Arco #2168, <br /> located on West Charter Way, Stockton, California Joint monitoring data is not included in the 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 Potentiometnc 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 /> Si rely, <br /> ' f <br /> Deanna L Har ing ON G- <br /> Project Coordinator ��, A, 0O <br /> NCn <br /> / �C � No 7504 <br /> i' N / .Q <br /> Robert A Lauritzen 911 _ <br /> Senior Geologist, P G No 7504 4`QF CA1rAO� <br /> Figure 1 Potentiometnc Map <br /> Figure 2 Concentration Map <br /> Table l Groundwater Monitoring Data and Analytical Results <br /> Table 2 Field Measurements <br /> Table 3 Groundwater Analytical Results-Oxygenate Compounds <br /> Table 4 Groundwater Analytical Results <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 />