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_ C � <br /> :.a <br /> `- in and carbon adsorption may be <br /> Combined use of air strippinwide Ofg,r 1 constituents have a requirements ex warranted when: { ent treatment req <br /> volatilities; (2) suing um in rates are <br /> or (3) hydrocarbon con centrainon8electively removes the <br /> relatively high. Air stripping <br /> most volatile components from toundstforer aremoval nd eby carbon <br /> residuals of less volatile comp tower <br /> adsorption Carbon adsorption is also often used to remove <br /> hose carbon is significantly more efficient <br /> constituents from the air emitted from the stripping <br /> since vapor-p air stripping <br /> than liquid-Phase carbon. Generallbercost effective where <br /> followed by carbon adsorption maY round water exceed <br /> hydrocarbon concentrations in the g <br /> 10 ppm. <br /> v <br /> ti <br /> solved <br /> ganic <br /> This treatment method by means ofschemi-calroxidation. <br /> constituents in water by <br /> as a catalyst in the chemical <br /> Ultraviolet light (UV) <br /> os as in water by its combined <br /> oxidation of organic comp <br /> - effect upon the organic contaminant and its reaction with <br /> eroxide. Hydrogen peroxide radicals ;ormed by <br /> hydrogen P powerful chemical oxidants <br /> reaction with W light arely organic compound in the water. <br /> which will react with amaterials costs and susceptibility <br /> Due to high energy burnout of W lights, changes in <br /> to problems (e-g. ► leading to ineffective treatment <br /> influent concentrations this method was determined not <br /> alitY,and a wer applicablento this site- <br /> - t qu <br /> to be app <br /> Lig the gradient between the <br /> Reinjection can be used to increase the recovery rate of <br /> the plume by locally increas g <br /> reinjection and withdrawal points. Reinjection isnormally <br /> rein] lex and economically costly tion <br /> more technically come product <br /> • discharge methods. Technical ifundesirableifreehPs op <br /> include the potential to promote ration into previously <br /> or dissolved-phase <br /> plume 9 Reinjection also creates the <br /> unaffected ground water. ReimofLO <br /> possibility of reintroducing low concentrnecessitate more <br /> contaminants into the aquifer, which may <br /> stringent treatment system design parameters. <br /> reinjection is generally perceived as not <br /> Additionally, rein] <br /> being a preferred method for treated water discharge- <br /> _ truck <br /> This option would involve onsite storage of -treated water <br /> rn or construction projects. <br /> in above ground tanks with transportation of water by <br /> offsite for reuse in landscaping <br />