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,1011211998 ,16:99 9165350207 APEX ENVIROTECH <br /> PA6E 19 <br /> REGENES#S Bioremediatidn .Products, Soil and Groundwater Alrcations <br /> pp <br /> GROUNDWAtE -APPLICATIONS <br /> AAV <br /> we <br /> �, {ZRC 5i <br /> i <br /> oam <br /> ImA <br /> y +- ,. z <br /> MAINSIOU <br /> ORC SOURCE ,TRA `1r+lW FOR GROUNDWATER AppLICATIONS. <br /> DRC may be used in the source area of the groundwater contamination. This applitration has`tv+ro <br /> objectives. The first is fast site closure. Sing aerobic blorermediation is about 10 to 100 tim' <br /> faster than anaerobic blore!mediation, an ORC application results in much faster site closure than- <br /> `natural att+elu;ation ;which is generally oxygen deficient. ORC treatment, also, can be faster than <br /> highly' engineeeread mechanical treatment methods-. The second objective is risk reduction. Even it <br /> the source: is not 0" mpletely cleaned up, the application of OK will collapse the plume and permit <br /> compliance at a print closer to the: source. <br /> For source treatment,-DRC may be applied, using retrievable :filter socks iced in completed <br /> monitoring wells, or'in a water and ORC powder slurry mixture. In this slurry farm the: ORC may be <br /> ,back filled or injetict'd into direct-push bare holes, or back'-filled into augered holesAsing any one <br /> of these methods, a saturated zone source treatment with an ORC slurry targets dissolved prase <br /> ,contamination plus)sorlaed material within the saturated, capillary fringe, and,smear zones. It, is k <br /> important that the e:ntime vertical distance,trf these contaminant zones be covered by the ORC for <br /> a source treatment.. <br /> The economics of art ORC source:treatment for groundwater are compelling. The cost can be 50%to� <br /> TS% of that for trser%iitional treatment systems such as pump and treat and'air spar9ft.- The: <br /> 'following is the +caMst`compSftM, of an ORC and an air sparging treatment for a:site inC*lahomas: � <br /> The site treatment;,sre,a It, ::square feet and the rancaminatei portion of the satearet+ad tare, <br /> is 1'1 feet. 'fhe OMI HT�4 gyration la t grauni�vrate�r�s=25 ppm, Ther CIRC systwn is sized to <br /> k <br /> close the site in one year nrttile it is assumed that the air spar'" S. Will take three to <br /> closure: andhires's soli vapor extraction <br /> Ceq system. The exrsts +csarnpare ss°folk xis <br /> _ <br /> WRC Tre �— <br /> acme:nth lli�r $pargIn Wkh <br /> 9 , <br /> Syete na lnstaltation' <br /> Qp+eratingµ Costs ; .. 17.9s . �w..32 3OiI <br /> Total _CostsY 1 $46,286 111, <br /> $158,834 <br /> REGENESIS!has svffware :available which w'it ,rake the necessarycafculetions given the <br />