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Blaes Environmental Mairagemeni Inc E}-Haul#709-50 002-70950-03 work Plan 1118/01 using EPA Methods 8015B and 8260B full list, respectively In addition, the influent vapor sample will also be submitted for fixed gases analyses including carbon dioxide, oxygen, methane and nitrogen Throughout the VE pilot test, the effluent vapor stream will be monitored with a PID to determine if activated carbon system is effectively treating the vapor stream In the event the carbon system indicates a petroleum hydrocarbon breakthrough, the test will be postponed or stopped depending on the quality of field data at the time of breakthrough Based on previously gathered soil data at DP-2, Blaes Environmental proposes the use of two 200-pounds (two 55-gallon drums) vapor-phase carbon vessels for soil gas treatment The vessels will be manifolded in line to assure that proper pilot test time is achieved It should be noted that upon completion of the VE pilot test, the spent granular activated vapor-phase carbon will be disposed of in accordance with the EPA regulations Per the recycling/regeneration facility's requirements, an appropriate volume of the spent carbon sample will be sampled for waste characterization purposes Upon receipt of waste characterization, the spent carbon receiving facility will assign a waste acceptance code Once the waste acceptance code is assigned, the spent carbon vessels will be removed from the site and shipped for recycling and/or regeneration under proper manifests 4 3 3 Air Sparge Pilot Test Following the VE pilot test, Blacs Environmental personnel will conduct an AS pilot test at the AS well During the test, the AS well will be pressurized with injected air to overcome the hydrostatic pressure head and force air into the aquifer materials through the well screen At a minimum, the AS pilot test will consist of four pressure steps It is anticipated that actual AS pilot test time will last between 6 to 7 hours, excluding the pre- and post-pilot test setup and sampling Prior to the AS pilot test, VE wells MW-3b and MW-4b will be manifolded to pressure gauges for recording the injected pressure In addition, the AS well head will be manifolded to an in-line flow meter and a pressure gauge to record injected air pressure and corresponding air flow rate Prior to commencing the AS pilot test, water levels and DO readings will be collected at the VE well, MW-3b, MW-4b, MW-1, MW-2, MW-3 and MW-4 In addition, non-purge groundwater samples will be collected at MW-3b and MW-3 The same DO and non-purge groundwater sampling activities will be conducted upon completion of the AS pilot test Pre- and post-AS data gathering will assist Blaes Environmental in evaluating the AS radius of influence at the site Groundwater samples collected during i 18