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Mr Ron Rowe I <br /> Page 2 <br /> Petroleum hydrocarbons were detected in groundwater samples collected from all wells, except <br /> MW-7, MW-11, and MW-12 The highest concentrations of TPHg and BTEX were detected <br /> in samples collected from wells MW-2, MW-5, and MW-13, located southeast, northeast, and <br /> east, respectively, of the former USTs MTBE was below detection limas in all wells <br /> Recommendations <br /> Ground Zero recommends continuing quarterly sampling to monitor the extent of gasoline <br /> hydrocarbons in groundwater The next sampling event is scheduled for October 1997 Your <br /> office will be provided 48-hours notice of any field work <br /> The approved soil vapor cxtraction system construction started on August 4, 1997 You will be <br /> notified prior to system start up <br /> Please call if you have any questions regarding this quarterly monitoring and sampling event <br /> Sincerely, <br /> Ground Zero Analysis, Inc <br /> k <br /> b u/� <br /> Jeanne Buckthal z� o <br /> 4 <br /> Staff Geologist r ' C� <br /> 'J) <br /> � � f �RE,aJNY p '{ <br /> J STAHL <br /> 5023 <br /> I Gregory P Stahl, RG 5023 <br /> CA Certified Hydrogeologist 264 <br /> E �'F CAL1 <br /> Attachments <br /> p^ Mr Carl Knowles <br /> { Mr Glen Van Dyke, Law Offices of Riddle & Isola <br /> Ms Elizabeth Thayer, CRWQCB Sacramento <br /> � I <br /> E <br /> f <br /> r <br /> rc gmA3gml W7 <br /> { <br />