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;I <br /> Mr Jeff Wong <br /> Page 4 of 4 <br /> Based upon analytical results of groundwater samples collected from well MW9B, it does not <br /> appear that dissolved gasoline constituents in the shallow aquifer has migrated vertically to <br /> deeper water-bearing zones <br /> 5.0 RECOMII-NDATIONSIADDMONAL WORK <br /> Ground Zero recommends implementing the Workplan for Additional Subsurface Investigation <br /> and Feasibility Evaluation, which was submitted to EHD on September 20, 2002 to address <br /> further definition of the dissolved MTBE plume and to conduct feasibility evaluation of <br /> groundwater remediation and/or plume migration control To date, EHD has not provided <br /> written comments or approval of the workplan <br /> The next monitoring and sampling event is scheduled for March 2003 Ground Zero will <br /> notify EHD at least 48 hours prior to conducting fieldwork <br /> Please contact Ground Zero at (209) 838-9888 if you have any questions or require additional <br /> information <br /> Respectfully, <br /> Ground Zero Analysis, Inc <br /> �" . '���ED G , 0 <br /> Sean Garvey [�nI <br /> LANE- <br /> UP <br /> ri <br /> Staff Geologist J�NE-No 6 <br /> 795 <br /> John P Lane <br /> CA Registered Geologist No 6795 0 CAL�� <br /> Attachments <br /> cc Mr Ray Bagl ietto/Mr Frank Rauzi <br /> Mr Marty Hartzell, CRWQCB <br /> G 1Data1GROUNDZEITULEBURG\Repons\QMR14QM2002 dor- <br />