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• WORK PERFORMED THIS QUARTER(Second 2005) 1 Stratus monitored all vapor extraction and monitoring wells for the presence of water and free product on June 21, 2005 On June 21, 2005 groundwater samples were collected from wells MW-2, MW-8, MW-10, MW-12, MW-13, VW-2 through VW-5, and the domestic well Wells MWA, MW-15, and VW-1 had free product and were not sampled Well VW-6 had a vehicle parked over it, therefore this well was not monitored or sampled Two gallons of product/water mixture were manually bailed from wells MWA and MW-15, and three gallons of product/water mixture were manually bailed from well VW-1 The other vapor and monitoring wells were either dry or could not be sampled due to poor well recovery 2 Stratus coordinated and conducted the start-up of a Solleco 500 cfm thermal oxidizer in the presence of San Joaquin Valley Air Pollution Control District (SJVAPCD) personnel 3 Stratus conducted eleven site visits to complete the installation of the SVE system, to conduct start-up operations, to conduct routine operation and maintenance, and to collect the required discharge compliance air samples from the SVE system Free product, if measured, was also manually bailed during these site visits 4 Stratus compiled and evaluated the monitoring and sampling data 5 Stratus prepared and submitted a Source Test Report(dated July 14, 2005), documenting the SVE system start-up WORK PROPOSED FOR NEXT QUARTER(Third 2005) • 1 Stratus will continue to monitor for free product periodically, and if present, bail floating product from wells MWA, MW-15, VW-1, and VW-4 2 The next sampling event is tentatively scheduled for September 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 conduct bi-monthly site visits to monitor system performance, maintain equipment, and to collect compliance samples from the SVE system Current Phase of Project Monitoring 1 Remediation Frequency of Groundwater Sampling All Monitoring Wells=Quarterly Frequency of Groundwater Monitoring Quarterly Sampling Date June 21, 2005 Is Free Product(FP) Present on Site Yes(wells MW-1, MW-15, and VW-1) FP Recovered This Quarter 23 gallons Cumulative FP Recovered to Date 241 gallons Depth to Groundwater(Upper) 32 42 to 65 17 feet below ground surface (bgs) . Groundwater Flow Direction (Upper) South-southeast Groundwater Gradient(Upper) 0 118 ft/ft K 16P-Arco for URS161001Quarterly120051Arco__6100 2Q05 doe 57RPATU5