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sampled due to the presence of floating product The other vapor and monitoring wells were either dry or could not be sampled due to poor well recovery 3 Stratus prepared and submitted a permit to operate (PTO) cancellation letter (dated December 21, 2004) requesting cancellation of permits for the two King, Buck, and Associates, Inc, SVE systems 4 ARCO procured a new Solleco 500 cubic feet per minute (cfm)thermal oxidizer with a 40 hp liquid ring blower to replace the two King, Buck, and Associates, Inc , SVE systems 5 Stratus removed the two 200 cfm King, Buck, and Associates, Inc, SVE systems from the site 6 Stratus compiled and evaluated the fourth quarter 2004 monitoring and sampling data WORK PROPOSED FOR NEXT QUARTER(First 2005) 1 Stratus will continue to remove floating product, if present, from wells MW-1, MW-15, VW-1, and VW-4 on a weekly basis 2 The next sampling event is tentatively scheduled for March 2005 Groundwater samples will be analyzed for gasoline range organics (GRO), benzene, toluene, ethylbenzene, total xylenes (BTEX), tertiary butyl alcohol (TBA), methyl tertiary butyl ether (MTBE), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), 1,2-dichloroethane (1,2-DCA), 1,2-dibromoethane (EDB), and ethanol using USEPA Method 8260B 3 Stratus will prepare and submit an authority to construct (ATC) application for the new Solleco 500 cfm thermal oxidizer 4 Stratus will prepare and submit a letter report documenting the details associated with replacement of the remediation equipment Stratus will retain an electrical contractor to make electrical connections for the new Solleco 500 cfm thermal oxidizer Stratus will also retain a propane vendor to install and provide propane service required for the thermal oxidizer 5 Stratus will conduct bi-monthly site visits to monitor system performance, maintain equipment, and to collect compliance samples Current Phase of Project Monitoring/Remediation Frequency of Groundwater Sampling All Monitoring Wells=Quarterly Frequency of Groundwater Monitoring Quarterly Sampling Date December 20, 2004 Is Free Product(FP) Present on Site Yes(MW-1, MW-15,VW-1, and VW-4) FP Recovered This Quarter 11 gallons Cumulative FP Recovered to Date 216 gallons Depth to Groundwater(Upper) 34 05 to 65 38 feet below ground surface (bgs) Groundwater Flow Direction (Upper) South Groundwater Gradient(Upper) 0 091 ft/ft Depth to Groundwater(Lower) 92 88 to 106 70 feet bgs K\13p-Arco for UR516100IQuarterly120041Arco_6100_4Q04 doc STRA7I15