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GE r r - INC. <br /> LER YQ N <br /> September 19, 2002 <br /> G-R Job#180288 <br /> Mr Edward C Ralston <br /> Phillips 66 Company <br /> 1380 Lead Hill Road, Suite 120 <br /> Roseville,California 95661 <br /> RE: Third Quarter Event of August 8,2002 <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 field work was conducted in accordance with G-R Standard Operating Procedure- <br /> Groundwater Sampling (attached) A point 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 Potentiometric 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 /> Foe- <br /> Deanna L Harding 0 GEO` <br /> Project Coordinator <br /> mkt OpJ C��sem, <br /> No. 6582 <br /> Doug as J <br /> Senior Geo ogist,R G No 6882 <br /> Figure 1 Potentiometric Map CAL�� <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 Dissolved Oxygen Concentrations <br /> Table 4 Joint Groundwater Monitoring Data and Analytical Results- Shell <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> 11 192agm] Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Sierra Court , Shite J • Dublin , California 94568 ( 925 ) 551 - 7555 <br />