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GETTLER - RYAN NC. <br /> February 13, 2001 <br /> G-R Job#180183 <br /> Mr Edward C Ralston <br /> Tosco Marketing Company <br /> 1380 Lead Hill Road, Suite 120 <br /> Roseville,California 95561 <br /> RE First Quarter Event of January 8,2001 <br /> Groundwater Monitoring & Sampling Report <br /> Tosco (Circle K) Unit#01205 <br /> 16470 Cambridge Street <br /> Lathrop, California <br /> Dear Mr Ralston <br /> This report documents the well development and 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, <br /> G-R.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 <br /> groundwater elevations are summarized in Table 1 <br /> Groundwater samples were collected from the monitoring wells as specified by G-R Standard Operating <br /> Procedure - Groundwater Sampling (attached) The field data sheets are also attached The samples were <br /> analyzed by Sequoia Analytical Analytical results are summarized in Tables 1 and 2 The chain of custody <br /> document and laboratory analytical reports are also attached <br /> Sincerely, l <br /> Deanna Na rding� Y <br /> Project Coordinator <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 /> 0120 qnd Chain of Custody Document and Laboratory Analytical Reports <br /> I <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925) 551 -7555 <br />