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{� r <br /> r•, <br /> GETTLER - RYAN NC. <br /> December 19, 2002 <br /> G-R Job#180238 <br /> Mr Edward C Ralston <br /> ConocoPhillips <br /> 76 Broadway <br /> Sacramento, California 95812 <br /> RE. Fourth Quarter Event of November 14, 2002 <br /> Groundwater Monitoring & Sampling Report <br /> Former Tosco(Unocal) Service Station#4409 <br /> 1502 North El Dorado Street <br /> Stockton,California <br /> Dear Mr Ralston <br /> This report documents the most recent groundwater monitoring and sampling event performed by Gettler-Ryan Inc (G- <br /> R) at the referenced site All field work was conducted in accordance with G-R Standard Operating Procedure - <br /> Groundwater Sampling(attached) A point groundwater monitoring event was scheduled but not performed with Arco <br /> Service Station #4932, located at 16 East Harding Way, Stockton, California <br /> Static groundwater levels were measured and all wells at the referenced site were checked for the presence of separate- <br /> phase hydrocarbons Separate-phase hydrocarbons were not present in any of the wells Static water level data and <br /> groundwater elevations are summarized in Table 1 <br /> Groundwater samples were collected from the monitoring wells and submitted to a state certified laboratory for analyses <br /> The field data sheets for this event are attached Analytical results are presented in the table(s)listed below The chain <br /> of custody document and laboratory analytical reports are also attached <br /> Sincerely, <br /> Deanna L Harding <br /> Project Coordinator <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results -Oxygenate Compounds <br /> Table 3 Joint Groundwater Monitoring Data and Analytical Results-Arco#4932 <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> 4409 qmi Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 (925 ) 551 -7555 <br />