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' Geological recluuca I= • • Page 6 <br /> ' Work Plan <br /> George's Service <br /> Project No.425.2 <br /> August 14,2002 <br /> Parameter Source ot the ac ground Plume Behavior Plume Behavior <br /> ' Parameter Core' Margins <br /> isso ve xygen aAcceptor Positive Value Depleted Mildly ep ete <br /> urate a Acceptor rte peci is ep ete of Depleted <br /> ' FerrousIron' eta o is Byprodi ite peci rc riric a of Enriched <br /> Sulfate' e' cceptorrte peri is ep ete Mildly Depleted <br /> e ane eta o isypro uct very ow nnc eSlightly hunched <br /> emperature eo i <br /> ta s ypro uct rte peci is Elevateightly Elevated <br /> pTf- Metabolic Byproduct Site Specific Unaffected <br /> Alkalinity eta o is ypro uct Site SpeciHc nnc a na ecte <br /> Redox otentia eta o is ypro uct osrtrve a ue ep eteSlightly ower <br /> ' on uctivityMetabolic Byproduct ite peci is owere na ecte <br /> y ogen aAcceptor on etect evate ig t y Elevated <br /> e=e ectron <br /> Type I plume characteristic, strongly reducing conditions near source <br /> ' Type III plume characteristic, mildly oxidizing conditions downgradient form source <br /> Terminal electron accepting process: <br /> 1 = aerobic respiration <br /> ' 2=denitrification <br /> 3 =reduction <br /> 4=methanogenesis <br /> 5 = fermentation,primarily at chlorinated solvent sites <br /> ' 6=exothermic reactions <br /> 2.2.3 Intrinsic Bioremediation Parameter Analysis <br /> In addition to the chemical testing proposed in Section 2.2.1, it is proposed that on two <br /> ' separate quarterly groundwater monitoring events, the following intrinsic biodegradation <br /> parameters are tested for. This information will be helpful in determining if the <br /> contaminant plume is stable, expanding, or contracting via degradation or if the plume is <br /> moving off site. <br /> The recommended natural attenuation parameters are given below: <br /> ' • Nitrate <br /> • Ferrous Iron** <br /> • Sulfate <br /> ' Alkalinity <br /> • Dissolved Oxygen <br /> ' • Temperature <br /> • pH <br /> • Redox Potential <br /> ' • Conductivity <br /> **=Ferrous iron is expensive to test for and difficult to preserve(Ferrous iron changes to Ferric <br /> Iron immediately upon contact with oxygen),total 'iron will be substituted <br /> ' IS <br /> GTI proposes to test for these parameters in monitoring wells, MW-1 thio MW-8, MW-101, <br /> MW-2X, MW-102, MW-105, MW-106, MW-107 and MW-201. These wells will give an <br /> ' understanding of what the contaminate plume is doing up gradient, cross gradient, in the <br />