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page 2, 515 Charter Way <br /> contamination removed by the system have dropped considerably since the system <br /> began operation. This may indicate that the system is reaching an asymptotic level in its <br /> ability to recover contaminants from the shallow zone. The status report noted that the <br /> system was shut down in July 2001 pending contract negotiations. <br /> This site must complete its investigation of the vertical and lateral extent of the <br /> documented petroleum hydrocarbon contamination in both soil and groundwater. <br /> Additional monitoring wells are needed, both shallow wells, and deep, discretely <br /> screened wells. Feasibility testing and a feasibility study must be completed to <br /> determine the most appropriate and cost effective method for the remediation of the <br /> groundwater contamination. Submit to SJC/EHD a work plan to compete the vertical <br /> and lateral investigation at this site. Include in the work plan a proposal for feasibility <br /> testing. The work plan is due for submittal to SJC/EHD by February 25, 2002. In the <br /> meantime, routine quarterly groundwater monitoring and sampling must continue at this <br /> site until directed otherwise by SJC/EHD. In all future monitoring events the direction of <br /> the groundwater gradient must be determined from site specific data. <br /> If you have any questions or comments please call Lori Duncan at (209)468-0337. <br /> Donna Heran, REHS, Director <br /> Environmental Health Department <br /> Lori Duncan, Senior REHS Margare agorio, Supervising REHS <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit IV <br /> cc: Marty Hartzell, Regional Water Quality Control Board, Central Valley Region 5 <br /> Mike Sgourakis, IT Corporation <br />