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WORK PERFORMED THIS QUARTER(First 2006)
<br /> 1 Stratus monitored all vapor extraction and monitoring wells for the presence of water and free
<br /> product on March 28, 2006 Groundwater samples were collected from wells MW-2, MW-4, MW-8,
<br /> MW-9, MW-10, MW-12, MW-13, VW-2, VW-3, VW-5, and the domestic well Well MW-15 had free
<br /> product and was not sampled Wells MW-1, VW-1, and VW-4 had a product sheen and were not
<br /> sampled VW-6 was Inaccessible and therefore was not monitored or sampled
<br /> 2 Off-site monitoring wells MW-16 through MW-20 Installed during December 2005, could not be
<br /> monitored or sampled due to saturated ground conditions These wells are scheduled to be
<br /> developed and sampled during second quarter 2006
<br /> 3 Stratus conducted twelve site visits to conduct routine operation and maintenance, and to collect the
<br /> required discharge compliance air samples from the SVE system Free product, If measured, was
<br /> also manually bailed during these site visits
<br /> 4 Stratus bailed approximately 2 gallons of product/water mixture from MW-1, approximately 9 gallons
<br /> from well MW-15, approximately 2 gallons from well VW-1, and approximately 2 gallons from well
<br /> VW-4
<br /> 5 Stratus compiled and evaluated the monitoring and sampling data
<br /> WORK PROPOSED FOR NEXT QUARTER(Second 2006)
<br /> 1 Monitoring for the presence of free product in wells MW-1, MW-4, MW-15, VW-1, and VW4 will be
<br /> • conducted periodically, and if present, the floating product will be removed by manual balling
<br /> 2 Water levels will be measured and samples will be collected from wells MW-2, MW-4, MW-8,
<br /> MW-10, MW-12, MW-13, MW-16 through MW-20, VW-1, and VW-4 A water sample will also be
<br /> collected from the water supply well Wells MWA and MW-15 will also be sampled If floating
<br /> product is not present
<br /> 3 The next sampling event is tentatively scheduled for June 2006 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-dichloroethane (1,2-DCA),
<br /> 1,2-dibromoethane (EDB), and ethanol using USEPA Method 8260E
<br /> 4 Bi-monthly site visits will be conducted to monitor system performance, maintain equipment, and to
<br /> collect compliance samples from the SVE system
<br /> 5 Newly installed wells MW-16 through MW-20 were developed on April 25, 2006 The wells are
<br /> scheduled to be sampled in May 2006, and a well installation report will be submitted after the
<br /> receipt of analytical data
<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 March 28, 2006
<br /> . Is Free Product(FP) Present on Site Yes (FP MW-15, and sheen MW-1,VW-1, and VW-4)
<br /> K\Bp-Arca for URS\6100\Quarter1y\2006\Arco_6100_IQ06 doe 57RATJ5
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