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a <br /> 6ETTLER - RYAN INC. <br /> December 20, 2002 <br /> G-R Job#180288 <br /> Mr Edward C Ralston <br /> ConocoPhillips <br /> 76 Broadway <br /> Sacramento, California 95812 <br /> RE: fourth Quarter Event of November 15, 2002 <br /> Groundwater Monitoring &Sampling Report <br /> Tosco(Former BP)Service Station#11192 <br /> 1403 Country Club Boulevard <br /> Stockton,California <br /> Dear Mr Ralston <br /> This report documents the most recent groundwater monitoring and sampling event performed by Gettler-Ryan Inc <br /> (G-R)at the referenced site All fieldwork was conducted in accordance with G-R Standard Operating Procedure- <br /> Groundwater Sampling(attached) A Joint groundwarter monitoring event was conducted with the Former Shell <br /> Service Station, located at 1267 Country Club Boulevard, Stockton, California <br /> Static groundwater levels were measured and all wells were checked for the presence of separate-phase <br /> hydrocarbons Separate-phase hydrocarbons were not present in the wells Static water level data and groundwater <br /> elevations are summarized in Table 1 Field Measurements are summarized in Table 3 and a Potentiometnc Map is <br /> 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 /> Sincerely, <br /> Deanna L Harding <br /> Protect Coordinator <br /> C <br /> O� pExp <br /> No <br /> Robert C Mallory t1j► ol ° Q' <br /> Registered Geologist, No 7285 q�OFCAL�Fp�� <br /> Figure 1 Potentiometric Map <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results-Oxygenate Compounds <br /> Table 3 Field Measurements <br /> Table 4 Joint Groundwater Monitoring Data and Analytical Results- Shell <br /> Attachments Standard Operating Procedure- Groundwater Sampling <br /> Field Data Sheets <br /> 11192 yml Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925 ) 551 - 7555 <br />