Results of RCRA groundwater quality assessment program at the 216-U-12 crib

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Description

The 216-U-12 crib has been in a Resource Conservation and Recovery Act of 1976 (RCRA) interim-status groundwater quality assessment program since the first quarter of 1993. Specific conductance measured in downgradient wells 299-W22-41 and 299-W22-42 exceeds its critical mean. This report presents the results and findings of Phases I and II of the assessment monitoring program, as required by 40 CFR 265.93. The elevated levels of specific conductance in the downgradient {open_quotes}triggering{close_quotes} wells are attributed to nitrate, the mobile anion released when nitric acid is diluted in water, and calcium which is released from the sediments as acid is neutralized. ... continued below

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61 p.

Creation Information

Williams, B.A. & Chou, C.J. May 1, 1997.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

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  • Pacific Northwest Laboratory
    Publisher Info: Pacific Northwest Lab., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

The 216-U-12 crib has been in a Resource Conservation and Recovery Act of 1976 (RCRA) interim-status groundwater quality assessment program since the first quarter of 1993. Specific conductance measured in downgradient wells 299-W22-41 and 299-W22-42 exceeds its critical mean. This report presents the results and findings of Phases I and II of the assessment monitoring program, as required by 40 CFR 265.93. The elevated levels of specific conductance in the downgradient {open_quotes}triggering{close_quotes} wells are attributed to nitrate, the mobile anion released when nitric acid is diluted in water, and calcium which is released from the sediments as acid is neutralized. Technetium-99 levels have been elevated in these same downgradient wells since 1991. The source of these constituents is the 216-U-12 crib. Downward migration of nitrate and technetium-99 from the vadose zone (and continued elevated specific conductance in the two downgradient wells) is still occurring because the driving force is still present.

Physical Description

61 p.

Notes

INIS; OSTI as DE97053053

Source

  • Other Information: PBD: May 1997

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  • Other: DE97053053
  • Report No.: PNNL--11574
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/493373 | External Link
  • Office of Scientific & Technical Information Report Number: 493373
  • Archival Resource Key: ark:/67531/metadc678155

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Creation Date

  • May 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:21 a.m.

Description Last Updated

  • June 13, 2016, 8:47 p.m.

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Williams, B.A. & Chou, C.J. Results of RCRA groundwater quality assessment program at the 216-U-12 crib, report, May 1, 1997; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc678155/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.