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1 <br /> GETTLER - RYAN INC. <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 95661 <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, <br /> U <br /> Deanna L arding� r <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 /> Chain of Custody Document and Laboratory Analytical Reports <br /> 01205 qml <br /> 6747 Sierra Court, Suite J • Dublin , California 94568 {925 ) 551 - 7555 <br />