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Mr James Barton <br /> ' June 14, 2004 <br /> Page 5 <br /> ' The following table outlines additional activities that are to be completed to investigate and control <br /> Plume migration at the site <br /> ' Activity to be completed Estimated Start Date Estimated <br /> Completion Date <br /> Conduct a mayor service and overhaul of the June 15, 2004 July 15, 2004 <br /> ' AS/SVE units to return units to operability <br /> (Assumes any needed parts are readily <br /> available for shipment to site <br /> ' Update SVE system Air Permit with San June 15, 2004 August 1, 2004 <br /> Joaquin Valley Air Pollution Control District <br /> (SJVAPCD) (Assume min 30 days for <br /> ' <br /> Regulatory Approval) <br /> Install shut-off valve into AS line going under June 15, 2004 July 15, 2004 <br /> Robinhood Drive because Impacts on the <br /> 1 Unocal side of the street(North) are almost <br /> completely remediated and may no longer <br /> need constant air infection This valve would <br /> also allow more airflow to be directed to the <br /> areas with the most concentrated portions of <br /> the plume on the former Wards site <br /> Additional modifications to the AS/SVE piping June 15, 2004 July 15, 2004 <br /> system including Installing control valves at <br /> well heads and pressure gages These <br /> modifications would allow better control of the <br /> system and the ability to target specific areas <br /> of the site for increased or decreased <br /> s ar in /vacuum <br /> In addition to continuing operation of the June 15, 2004 September 15, 2004 <br /> existing AS/SVE system, additional <br /> enhancements to the system will be evaluated <br /> ' including in situ chemical oxidation (ISCO)with <br /> ozone or Fenton's reagent and in situ bio- <br /> stimulation through the addition of oxygen <br /> e (ozone or hydrogen peroxide) and nutrients <br /> -Prepare a CAP Modification <br /> Restart SVE system to provide"pull" on August 1, 2004 August 15, 2004 <br /> groundwater and control plume spread <br /> Restart the AS system The AS and SVE August 1, 2004 August 15, 2004 <br /> systems should be cycled on/off in alternating <br /> weeks to effect the greatest impact By cycling <br /> the units, the SVE system will act as a pull on <br /> the groundwater and simultaneously remove <br /> J 1Prolects10694015098-293WinaKReportsl5098 Work Plan doc <br /> _ Over 30 Years of Excellence in Envuonmental 5ermes <br />