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ETTL' ER - YAN <br /> June 28, 2001 <br /> G-R Job#180198 <br /> ff Mr. Edward C. Ralston <br /> L Tosco Marketing Company <br /> 1380 Lead Hill Road, Suite.]20 <br /> Roseville, California 95661 it <br /> I <br /> s <br /> RE: Second Quarter Event of May 26,2001 <br /> Groundwater Monitoring&Sampling Report II <br /> Tosco(Circle K) Unit#08671 <br /> 8606 Thornton 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 /> i+ r <br /> ij <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. A Potentiometric Map is included as Figure,1. <br /> Groundwater samples were collected from the.monitoring wells as specified by G-R 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. !!:IA Concentration Map is'included as Figure 2. The <br /> chain of custody document and laboratory analytical reports are'also attached. <br /> �i <br /> Sincerely, <br /> Ii <br /> s � <br /> it Deanna L. Harding <br /> Project Coordinator <br /> C"D <br /> 3 <br /> cDr� <br /> W No. C 55734 i <br /> d. xi I <br /> i <br /> Hagop Kevork Exp-I <br /> P.E. No. C55734 <br /> Figure 1: Potentiometric Map <br /> Figure 2: Concentration Map it k <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 /> Chan of Custody 1ocument ond Laboratory Analytical Reports <br /> � <br /> u867].qml <br /> 6747 Sierra Court , Suite J Dublin , Ca11:ifornia '94568 •: ( 925 ) 551 - 7555 t <br />