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"AWuAM <br /> r�r 4MNM&r r r <br /> It----ArmU <br /> Working to Restore Nature <br /> 5_1 VES System <br /> The proposed VES will utilize ten existing vapor extraction wells (VW-1 through VW-10), <br /> and two proposed wells (VW-11 and VW-12), a vacuum blower, and an off-gas abatement <br /> system to process extracted hydrocarbon vapors <br /> The VES will be operated under similar conditions as during the VET to achieve the same <br /> estimated radius of influence for each well The VES may be operated using individual <br /> wells or sets of vapor extraction wells in sequence, rather than operating all wells <br /> concurrently This approach will minimize the size and inherent operating costs for the off- <br /> gas abatement unit, while still allowing the air flow from individual wells to be maximized <br /> The actual radius of influence for the vapor extraction wells will vary depending on <br /> subsurface geologic conditions, the extent and distribution of hydrocarbon impacted soil, and <br /> site-specific operating conditions of the VES The effective radius of influence should be <br /> evaluated following long-term operation of the VES <br /> To minimize interruption of business activities, subgrade remediation piping was installed <br /> in conjunction with product line removal and replacement in third quarter 1993 Subgrade <br /> remediation piping for vapor extraction and air sparging was installed from each vapor <br /> extraction well to the proposed remediation compound location (Plate 9, Remediation <br /> System Layout) and from the proposed compound to each vapor well location The vapor <br /> extraction piping from each vapor extraction well will be mantfolded at the compound and <br /> equipped with a sample port, flow measurement capability, and a shut-off valve so that flow <br /> through each well can be adjusted to maximize the total pounds of petroleum hydrocarbons <br /> being extracted from the soil <br /> 30003-13 9 <br />