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ij. ;' 09/ 11 000i1n; " ?VI4_in 1 r,. FOOTHILL E.'ri+ �.sit.t.R.i.'ri _ A <br />Ze <br />t''j=.:«.ii Q:, T SUMMARY E"zYmF_ i`Ec:HNOLOGiES, i1VC. <br />MTBE AND BTEX DEGRAATION USING <br />IEiV�;�'.ME-CATI �,.L,�r ZEB WSSOEVED OX '(Fle=NI IN SITU TR.EA IE:�t`I. <br />GAS STATION SITE, CIS SHIR)::4 CT <br />?✓'nzyT ie Tecli.nologies' (ETEC) Enzytrle-C,at~ilyzed lei :.solved Oxygen In Situ Trt,-,lirilenL <br />(l t ••15`) nrcrcess was used at a former gets stwinn site in C'onnec,ticut to dcgrade BTEX and <br />I, A`f'I3l Prior to ETEC's involvement, at the site, two other remedial technologies 1.13d beery <br />Atte 7.ntP{i w-itl.kout success. purnp-and-treat and air sf> rgingtvapor extraction, Enz},rnc <br />Technologies applied our revol.ution.ary DO -IT proses, at the site using the existing air <br />,purging and vapor extraction well inastructitre for i iDcttlati+lri points. No injection into <br />14;l ipling paints was performed in order to maintain re )resen;.ative data points. <br />iiie fstojea sJte- has a silty, sandy, gravelly[ aquiter, and <br />is adjclCFnt to a river. Grouridw°,,.teT <br />. ' � <br />G',}ltiil$ 1l, less than I 1 Feet be t[��.v ground surface, LEnzy <br />ne AlTeclizrologie-v used a ccnibin:�tion of <br />0111- unique Multi -Enzyme <br />i c+rnpl4Ye� fF:.�1•-MI.r'C'), Tf'I-f f, <br />���, '; t ,� t", <br />*. <br />Bacteri.11 Consortium (EZT- <br />}. and CttstoiriBlend <br />_Niutrients ff.ZT C131si). The <br />�[ <br />siil7 �it1� G�)itrpl�`x�S 1►11�7p �t�irt �,,:: <br />� ; � ? � �' '� I' '� `: <br />the rernediation proce-ss by <br />`• - <' <br />ca. )Wiling arnnlgtic xnd <br />-liph, c hVdrOC€j1013c to fitly w�•[ <br />.w = 503•;61.p941 <br />zl id' aftLr Which the bacteria <br />provide complete <br />, <br />mmuri liration la cmbori <br />dioxide and water. Oxygen was <br />provided via nur specialized <br />t Arc o XVLsli tr_ixing process <br />4ild i.Q1C3' i�5 I'lligh-dissolved oxygen water at concent ions of approximately 40 parts per <br />million fppni). <br />T tie site was incyc•1flaite•d with the Multi -Enzyme Comp exec, followed by the TPH Bacterial <br />Consortium_ A:n initial load ot'nutrients was added To tbe site, and nutrient levels were <br />r1iairtairiedI tltiraiighout tate process as needed. Oxygen t water was injected on a daily basis <br />via dryied injection. Oxygenated water was injected A a lite existing vapor extraction arid air <br />sparge piping infrastructure (see site lavotio. <br />aaseline grnu.naN °ater.-maples were collected by the s <br />inoculation o'l t11e site with Enzyme Technologies' 't)ic <br />high levels of NTTBF cont;inrinatioip, anal six wells slit <br />cotr'Amination. Significant degradation of the 13TEX <br />afier only ] 1 dans of operati:7lr. After 34 days of ope r <br />degradation of MT9F and _RTEX up to 97°/n in indivi( <br />ri'ductior) of 137,o and averaue BTEX reduction of 84°f <br />e consultant immediately prior to <br />).gical products, Threc wells showed <br />veil High levels of BTEX <br />id MTBE compounds Nvas reported <br />;ion, the DO -IT system achieved <br />ial wells, sA ith average- MTBE <br />in this time period. <br />