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a � <br /> i <br /> - 6ETTLER - RYAN INC. <br /> November 26, 2002 <br /> G-R Job#180183 <br /> Mr Edward C Ralston <br /> Phillips 66 Company <br /> 1380 Lead Hill Road, Suite 120 <br /> Roseville, California 95661 <br /> RE: Fourth Quarter Event of October 25,2002 <br /> Groundwater Monitoring & Sampling Report <br /> Tosca (Circle K) Unit #01205 <br /> 16470 Cambridge Street <br /> Lathrop, California <br /> Dear Mr Ralston <br /> This report documents the most recent groundwater monitoring and sampling event performed by Gettler- <br /> Ryan Inc (G-R) at the referenced site All field work was conducted in accordance with G-R Standard <br /> Operating Procedure- Groundwater Sampling (attached) <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 <br /> groundwater elevations are summarized in Table 1 A Potentiometric Map is included as Figure I <br /> Groundwater samples were collected from the monitoring wells and submitted to a state certified laboratory <br /> for analyses The field data sheets for this event are attached Analytical results are presented in the table(s) <br /> listed below A Concentration Map is included as Figure 2 The chain of custody document and laboratory <br /> analytical reports are also attached <br /> SaaACt — <br /> 1 <br /> pFESSJ <br /> Deanna L Harding @� 0�vq <br /> Project Coordinator to pP KEl/ <br /> w No C 55734 <br /> Hagop Kevork r Exp ��Q <br /> P E No C55734 <br /> Figure 1 Potentiometric Map �'9rN CIWl_ <br /> Figure 2 Concentration Map OF 0 J\ <br /> Table 1 Groundwater Monitoring Data and Analytical Results <br /> Table 2 Groundwater Analytical Results-Oxygenate Compounds <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Custody Document and Laboratory Analytical Reports <br /> 01205 ymi <br /> 6747 Sierra Court , Suite J • Dublin , California 94568 ( 925 } 551 - 7555 <br />