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Mm <br /> 1. H. KLEINFELDER & ASSOCIATES <br /> u TECHNICAL FEASIBILITY SCREENING <br /> 1. Technical Reliability <br /> Air stripping has been documented to effectively remove greater than 90% <br /> of VOC's from water. In order to design an efficient air stripping <br /> system, however, two important parameters must be evaluated: <br /> o Henry's constant at the appropriate concentration and temperature <br /> o The mass transfer coefficient that reflects air stripping tower <br /> conditions <br /> i ; <br /> 4- These data are utilized in conjunction with site-specific data to design a <br /> c. reliable treatment system. <br /> ,u <br /> 2. Implementability <br /> This technique is ra_adily implementable with "off-the-shelf" components. <br /> However, certain parameters must be evaluated, as mentioned above, prior <br /> to design, construction, and implementation. In addition, regulatory <br /> agencies must be involved for concurrence or permitting. <br /> „a <br /> To enhance treatment system performance, high air flow rates and <br /> pre-heated influent should be considered. Additionally, carbon adsorption <br /> of the off-gas (vapor phase) and or treated effluent (liquid phase) may be <br /> necessitated to achieve ground water reclamation standards or comply with <br /> air quality standards (see Figures 3.6.4 and 3.6.5). <br /> ENVIRONMENTAL SCREENING <br /> There are two distinct disadvantages associated with operating an air <br /> stripping system as a stand-alone remedial technique. Air emissions may <br /> be regulate;: with certain standards strictly enforced, and effluent <br /> quality may not meet the ground water reclamation standards. Both of <br /> these disadvantages are easily overcome through supplementing the air <br /> -- - -_- - -stripping-system-with-carbon adsorption-as-needed.- -- <br /> k <br /> 33-87-887 15 <br />