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r <br /> 6ETTLER - RYAN INC. <br /> i <br /> September 12, 2000 <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 Third Quarter 2000 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 July 5, 2000, field personnel monitored and sampled four wells (MW-1 through MW-4) at the <br /> 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 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 /> Deanna L Harding <br /> Protect Coordinator <br /> Table l 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 /> 61 <br /> 6747 Sierra Court , Suite J - Duplin , California 94568 ( 925 ) 551 - 7555 <br />