Groundwater Quality Assessment for Waste Management Area U: First Determination

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As a result of the most recent recalculation one of the indicator parameters, specific conductance, exceeded its background value in downgradient well 299-W19-41, triggering a change from detection monitoring to groundwater quality assessment program. The major contributors to the higher specific conductance are nonhazardous constituents (i.e., sodium, calcium, magnesium, chloride, sulfate, and bicarbonate). Nitrate, chromium, and technetium-99 are present and are increasing; however, they are significantly below their drinking waster standards. Interpretation of groundwater monitoring data indicates that both the nonhazardous constituents causing elevated specific conductance in groundwater and the tank waste constituents present in groundwater at the waste management ... continued below

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Hodges, Floyd N. & Chou, Charissa J. August 4, 2000.

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Description

As a result of the most recent recalculation one of the indicator parameters, specific conductance, exceeded its background value in downgradient well 299-W19-41, triggering a change from detection monitoring to groundwater quality assessment program. The major contributors to the higher specific conductance are nonhazardous constituents (i.e., sodium, calcium, magnesium, chloride, sulfate, and bicarbonate). Nitrate, chromium, and technetium-99 are present and are increasing; however, they are significantly below their drinking waster standards. Interpretation of groundwater monitoring data indicates that both the nonhazardous constituents causing elevated specific conductance in groundwater and the tank waste constituents present in groundwater at the waste management area are a result of surface water infiltration in the southern portion of the facility. There is evidence for both upgradient and waste management area sources for observed nitrate concentrations. There is no indication of an upgradient source for the observed chromium and technetium-99.

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  • Report No.: PNNL-13282
  • Grant Number: AC05-76RL01830
  • DOI: 10.2172/965201 | External Link
  • Office of Scientific & Technical Information Report Number: 965201
  • Archival Resource Key: ark:/67531/metadc930287

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Office of Scientific & Technical Information Technical Reports

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Creation Date

  • August 4, 2000

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

Description Last Updated

  • Nov. 28, 2016, 7:03 p.m.

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Hodges, Floyd N. & Chou, Charissa J. Groundwater Quality Assessment for Waste Management Area U: First Determination, report, August 4, 2000; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc930287/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.