Laserfiche WebLink
VAPOR EXTRACTION SYSTEM DESIGN <br /> '10 Con fi uration of the Vapor Extraction System <br /> The VES consisted of three groundwater monitoring wells (MW-1, MW-3, and MW-4), <br /> one groundwater recovery well (RW-1), and the previously installed vapor wells (VP-1, <br /> VP-2, VP-3, and VP-4) MW-1, MW-4, and RW-1 were each individually manifolded to <br /> a high capacity regenerative blower (one for each well) Each of these blowers are <br /> rated at a maximum of 160 standard cubic feet per minute (SCFM) Operation of the <br /> individual blowers at this site with the restrictions in the existing underground conduit <br /> and the tightness of the vadose zone actually yielded from 80 to 90 SCFM of vadose <br /> zone vapor from each blower MW-3, VP-1, VP-2, VP-3, and VP-4 were manifolded <br /> to one regenerative high capacity blower with variable flow ball valves to control vapor <br /> flow from each well A demister/water entrainment separator was manifolded in-line <br /> with MW-1 after the first month of operation due to the high moisture content in the <br /> P 9 i <br /> extracted vapors from this well The combined effluent from the blowers was <br /> manifolded into one four-inch line which then transported the extracted vapors to the <br /> activated carbon adsorption system <br />' ACtivated Carbon Adsorption System <br /> The activated carbon adsorption system was composed of three 2000 pound (net) <br /> activated carbon adsorption reactors in series These reactors were the up-flow <br /> cylindrical type with 6" inlet and outlet ports with pneumatic loading and unloading <br /> through the top which has a two foot diameter manhole The activated carbon is coal <br /> based, virgin 4 x 6 mesh extruded activated carbon capable of adsorbing up to 28% <br /> of its weight in gasoline with a carbon tetrachloride number of not less than 62% <br /> VAPOR EXTRACTION TECHNOLOGY, INC <br />