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■ <br /> 43 GETTLER ,- RYAN INC. <br /> March 10, 2003 <br /> G-R Job #180198 <br /> Mr Edward C Ralston <br /> ConocoPhillips <br /> 76 Broadway <br /> Sacramento, California 95818 <br /> i <br /> RE: First Quarter Event of February 3, 2003 <br /> Groundwater Monitoring& Sampling Report <br /> Tosco(Circle K) Unit#08671 <br /> 8606 Thomton Road <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) <br /> Static groundwater levels were measured and all wells were checked for the presence of separate-phase hydrocarbons <br /> Separate-phase hydrocarbons were not present in the wells Static water level data and groundwater elevations are <br /> summarized in Table 1 Joint groundwater monitoring and analytical data are presented in Table 3 A Potentiometric <br /> Map is 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 below <br /> A Concentration Map is included as Figure 2 The chain of custody document and laboratory analytical report are also <br /> attached <br /> Sincerely, <br /> Deanna L Harding <br /> Project Coordinator <br /> ,��ED GAO <br /> o 0o <br /> Robert C Mallory * No,7,,285,� 4 � <br /> Registered Geologist,No 7285 (P Exp la <br /> Figure 1 Potentiometnc Map � I OFCAL�F� <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 Joint Groundwater Monitoring Data and Analytical Results <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 0671 qmi <br /> 6747 Sierra Court , Suite J e Dublin , California 94568 . ( 925 ) 551 - 7555 <br />