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3 Stratus monitored all vapor extraction and monitoring wells for the presence of water and free <br /> product on September 6, 2004 Groundwater samples were collected on September 7, 2004 from <br /> wells MW-2, MW-10, MW-12, MW-13, MW-15, VW-1, VW-3, VW-6, and the domestic well Well <br /> MW-1 was not sampled due to the presence of floating product The other vapor and monitoring <br /> wells could not be sampled due to poor well recovery <br /> 4 Stratus compiled and evaluated the third quarter 2004 monitoring and sampling data <br /> WORK PROPOSED FOR NEXT QUARTER(Fourth 2004) <br /> 1 Stratus will continue to remove floating product from well MWA on a weekly basis, monitor free <br /> product thickness in selected wells, and remove floating product when present <br /> 2 The next sampling event is tentatively scheduled for December 2004 Groundwater samples will be <br /> analyzed for gasoline range organics (GRO), benzene, toluene, ethylbenzene, total xylenes (BTEX), <br /> tertiary butyl alcohol (TBA), methyl tertiary butyl ether (MTBE), di-isopropyl ether (DIPE), ethyl <br /> tertiary butyl ether (ETBE), tertiary amyl methyl ether (TAME), 1,2-dlchloroethane (1,2-DCA), <br /> 1,2-dibromoethane (EDB), and ethanol using USEPA Method 8260E <br /> 3 Stratus will conduct bi-monthiy site visits to monitor system performance, maintain equipment, and <br /> to collect compliance samples <br /> Current Phase of Project Monitoring/Remediation <br /> Frequency of Groundwater Sampling All Monitoring Wells=Quarterly <br /> Frequency of Groundwater Monitoring Quarterly <br /> Sampling Date September 7, 2004 <br /> Is Free Product(FP) Present on Site Yes(MW-1 and VW-4) <br /> FP Recovered This Quarter 15 gallons (13 gallons from MW-1 and 2 gallons from VW-4) <br /> Cumulative FP Recovered to Date 205 gallons <br /> Depth to Groundwater(Upper) 36 72 to 65 17 feet below ground surface (bgs) <br /> Groundwater Flow Direction (Upper) South-southeast <br /> Groundwater Gradient (Upper) 0 071 ft/ft <br /> Depth to Groundwater(Lower) 93 22 to 106 77 feet bgs <br /> Groundwater Flow Direction (Lower) East <br /> Groundwater Gradient (Lower) 0 036 ft/ft <br /> P\Bp-Arco for URS\6100\Quarterly\2004\Arco_6100_3Q04 doe 57-RATV5 <br />