Laserfiche WebLink
' Karding Lawson Associates <br /> made from. Catalytic oxidation requires less supplemental fuel <br /> than thermal oxidation as concentrations drop. This is a <br /> feasible method for treating the anticipated concentrations at <br /> this site but the lower supplemental fuel costs relative to <br /> thermal treatment may be offset by an extended project life. <br /> ' Cost analyses of this alternative will be necessary during <br /> equipment procurement. <br /> ' 3 . GAC Media <br /> GAC media absorbs hydrocarbon vapors until saturated <br /> and is effective for relatively low hydrocarbon concentrations <br /> (below approximately 3 , 000 mg/M3) . The absorption process is <br /> industry proven and satisfies regulatory compliance. After the <br /> initial high vapor concentrations have subsided, sustained vapor <br /> ' concentrations should be relatively low and drawn out for an <br /> extended period of time. Therefore, after the initial equipment <br /> investment, operating costs are low as long as the carbon does <br /> not need regeneration and replacement too often. This <br /> ' alternative is the recommended method for emission treatment in <br /> ' long term remediation projects. <br /> ' 4 . Polymer Resin Media <br /> Polymer resin bed technology is a new treatment method <br /> utilizing a polymer resin bed which has an affinity for <br /> hydrocarbon compounds. The resin beds are connected in series <br /> ' similar to activated carbon reactors. After saturation of the <br /> first bed, a third bed is switched on-line while the first bed <br /> ' 15 <br />