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13 6ETTLER - RYAN hVC. <br /> March 20, 2002 <br /> G-R Job#180137 <br /> Mr Edward C Ralston <br /> Phillips 66 Company <br /> 1380 Lead Hill Road, Suite 120 <br /> Roseville,California 95661 <br /> RE First Quarter Event of February 11 and 12,2002 <br /> Groundwater Monitoring & Sampling Report <br /> Tosco(Unocal) Service Station#5886 <br /> 2701 West March Lane <br /> Stockton, California <br /> Dear Mr Ralston <br /> This report documents the monthly site visits 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) <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 A Potentiometric Map is included as Figure 1 <br /> . Groundwater samples were collected from the monitoring wells as specified by Standard Operating Procedure - <br /> Groundwater Sampling(attached) The field data sheets are also attached The samples were analyzed by Sequoia <br /> Analytical Analytical results are summarized in Tables 1 and 2 A Concentration Map is included as Figure 2 The <br /> chain of custody document and laboratory analytical reports are also attached <br /> Sincerely, <br /> 1 <br /> r <br /> eanna L <br /> �Harding Qty()l SIO <br /> Q yq� <br /> Project Coordinator �, Op Krakv <br /> V F <br /> LU No C 555773j44 m <br /> Hagop Kevork <br /> * Exp <br /> P E No C55734 `r�qr <br /> Figure 1 Potentiometric Map-Shallow Zone OF C AL1F0 <br /> Figure 2 Concentration Map <br /> Table 1 Groundwater Monitonng Data and Analytical Results <br /> Table 2 Groundwater Analytical Results-Oxygenate Compounds <br /> Attachments Standard Operating Procedure-Groundwater Sampling <br /> Field Data Sheets <br /> • 5886 qml Chain of Custody Document and Laboratory Analytical Reports <br /> (925) 551 <br /> 6747 Sierra Court , Suite J Dublin , California 94568 -7555 <br /> I <br />