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collected from MW-6 (located within the hydrocarbon plume) than from the well located <br /> upgradient of the plume (MW-5) Sirrularly, the concentrations of metabolic byproducts <br /> (dissolved iron, dissolved manganese, and methane) in the sample collected from within <br /> the hydrocarbon plume are higher than in the sample collected upgradient <br />' At MW-2 (downgradient of former tank site 2), TPH-g concentrations are low to non- <br /> detectable, indicating that this well is at the downgradient edge of the hydrocarbon <br />' plume The results of the biodegradation parameter samples at this location are consistent <br /> with the TPH-g results With the exception of dissolved manganese, the concentrations of <br /> each of the biodegradation indicator compounds are similar to the concentrations <br /> observed in the upgradient well (MW-5), indicating that little to no biodegradation is <br /> occurring at this location Dissolved manganese at MW-2 is elevated relative to MW-5, <br /> however, because low organic concentrations are present at this location, little <br />' biodegradation is expected Figures C-8 through C-12 present the concentrations of each <br /> compound at each former tank site 2 sampling location <br /> 1 <br /> 1 <br /> I <br /> I <br /> I <br /> I <br />' C-2 <br />