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N <br /> INC.6ETTLER - RYAN N <br /> *191 February 6, 2003 <br /> G-R Job #180288 <br /> Mr Edward C Ralston <br /> ConocoPhillips <br /> 76 Broadway <br /> Sacramento, California 95918 <br /> RE- First Quarter Event of January 3,2003 <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 well development and the most recent groundwater monitoring and sampling event <br /> performed by Gettler-Ryan Inc (G-R)at the referenced site All field work was conducted in accordance with G-R <br /> Standard Operating Procedure - Groundwater Sampling (attached) A joint groundwater monitoring event was <br /> conducted with the Former Shell 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 /> Foy <br /> Deanna L Harding a K L qC <br /> Project Coordinator <br /> LU No C 55734 <br /> CC Zlo <br /> * Exp <br /> Hagop Kevork (P a�Q <br /> P E No C55734 9TF OF C AG C P, <br /> 0F <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 and Analytical Results <br /> . Table 4 Joint Groundwater Monitoring Data and Analytical Results- Shell <br /> Attachments Standard Operating Procedure- Groundwater Sampling <br /> Field Data Sheets <br /> 11 192-qm] Chain of Custody Document and Laboratory Analytical Reports <br /> 6747 Surra Court , Suite J • Dublin , California 94568 { 925 ) 551 -7555 <br />