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s ' <br /> • <br /> 6ETTLER - RYANINC. <br /> November 29, 1999 <br /> G-R Job #180183 <br /> Mr Edward C. Ralston <br /> Tosca Marketing Company <br /> 1380 Lead Hill Road, Suite 120 <br /> Roseville, California 95661 <br /> RE Fourth Quarter 1999 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 quarterly groundwater monitoring and sampling event performed by Gettler-Ryan <br /> Inc (G-R) On October 21, 1999, field personnel monitored and sampled four wells (MW-1 through MW-4) <br /> at the above referenced site <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 I <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 /> a <br /> Deanna L Harding <br /> Protect Coordinator <br /> Groundwater Monitoring Data and Analytical Results <br /> Table 1 G g Y <br /> Table 2 Groundwater Analytical Results - Oxygenate Compounds <br /> Attachments Standard Operating Procedure - Groundwater Sampling <br /> Field Data Sheets <br /> Chain of Ckistody Document and Laboratory Analytical Reports <br /> 01205 qml <br /> 011 <br /> 6747 Sierra Court , Suite J Dublin , California 94568 ( 925 } 551 - 7555 <br />