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biodegradation Ther <br /> tend in biodegradation indicators within a favorable groundwater redox <br />' potential supports that anaerobic biodegradation of BTEX is more dominant than aerobic <br /> Results of Biodegradation Indicator Testing <br />' WellID Date BTEX D.O N Fe S Redox <br /> MWl 1/11/99 ND 05 06 000 16 120 <br /> MW2 1/11/99 154 <2 1 05 136 >77 -15 <br /> MW3 1/11/99 ND 00 29 080 62 28 <br />' M W4 1108199 ND 19 20 U 00 71 120 <br /> 9MW81 <br /> 1/08/99 ND <br /> 00 20 000 58 131 <br /> 1/08/99 ND 00 1 5 000 56 43 <br /> 1/08/99 ND 00 16 000 67 140 <br /> 1/11/99 I332 00 119 53 -53 <br />' MW9 1/08/99 ND 00 09 000 75 <br /> H9 <br /> MW 10 1/11/99 42 02 28 3 10 48 96 <br /> MWI1 1/11/99 ND 22 06 000 75 82 <br /> M W 12 1/11/99 270 09 0 3 1 15 is -114 <br /> MV413 1/11/99 ND 09 O 1 083 68 -22 <br /> RLa I t p91L tt,19/L IIIg,/L Ill I <br /> mg/L ng/L_ mV <br />' RL,=Reporting Lima~ <br /> The calculated EACs for the dissolved BTEX plume are as follows <br />' EACDo = 0 32 (2 2-0 6) = 0 512 mg/L as BTEX <br /> EACH = 0 21 (2 9-0) = 0 609 mg/L as BTEX <br />' EACt, = 0 046 (3 19-0) = 0 147 mg/L as BTEX <br /> EACs = 0 21 (75-18) = 11 97 mg/L as BTEX <br /> Based on the Expressed Asbinulative Capacities for aerobic resptlduon, deiutnfic,anon, iron (1H) <br /> reduction, and sulfate reduction, the indigenous microbes have the assimilation capacity to <br /> biodegrade the entire BTEX plume The highest BTEX,-onc.entratzon was identified as 1,332 <br /> Pg/L in MW8 All calculated EACs were greater than 1,332 pg/L <br /> 19 <br />