Hanford Site groundwater monitoring for fiscal year 1996
Abstract
This report presents the results of groundwater and vadose-zone monitoring for fiscal year (FY) 1996 on the Hanford Site, Washington. Hanford Site operations from 1943 onward produced large quantities of radiological and chemical waste that affected groundwater quality on the site. Characterization and monitoring of the vadose zone during FY 1996 comprised primarily spectral gamma logging, soil-gas monitoring, and electrical resistivity tomography. Water-level monitoring was performed to evaluate groundwater-flow directions, to track changes in water levels, and to relate such changes to evolving disposal practices. Water levels over most of the Hanford Site continued to decline between June 1995 and June 1996. Groundwater chemistry was monitored to track the extent of contamination, to note trends, and to identify emerging groundwater-quality problems. The most widespread radiological contaminant plumes were tritium and iodine-129. Smaller plumes of strontium-90, technetium-99, and plutonium also were present at levels above the U.S. Environmental Protection Agency or State of Washington interim drinking water standards. Uranium concentrations greater than the proposed drinking water standard were also observed. Nitrate, fluoride, chromium, carbon tetrachloride, chloroform, trichloroethylene, and cis-1,2-dichlomethylene were present in groundwater samples at levels above their U.S. Environmental Protection Agency or State of Washington maximum contaminant levels. The nitratemore »
- Authors:
-
- eds.; and others
- Publication Date:
- Research Org.:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 481893
- Report Number(s):
- PNNL-11470
ON: DE97052273; TRN: 97:011010
- DOE Contract Number:
- AC06-76RL01830
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: PBD: Feb 1997
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 05 NUCLEAR FUELS; 54 ENVIRONMENTAL SCIENCES; HANFORD RESERVATION; SITE CHARACTERIZATION; REMEDIAL ACTION; GROUND WATER; MONITORING; RADIONUCLIDE MIGRATION; RADIOISOTOPES; RADIOECOLOGICAL CONCENTRATION
Citation Formats
Hartman, M J, Dresel, P E, and Borghese, J V. Hanford Site groundwater monitoring for fiscal year 1996. United States: N. p., 1997.
Web. doi:10.2172/481893.
Hartman, M J, Dresel, P E, & Borghese, J V. Hanford Site groundwater monitoring for fiscal year 1996. United States. https://doi.org/10.2172/481893
Hartman, M J, Dresel, P E, and Borghese, J V. 1997.
"Hanford Site groundwater monitoring for fiscal year 1996". United States. https://doi.org/10.2172/481893. https://www.osti.gov/servlets/purl/481893.
@article{osti_481893,
title = {Hanford Site groundwater monitoring for fiscal year 1996},
author = {Hartman, M J and Dresel, P E and Borghese, J V},
abstractNote = {This report presents the results of groundwater and vadose-zone monitoring for fiscal year (FY) 1996 on the Hanford Site, Washington. Hanford Site operations from 1943 onward produced large quantities of radiological and chemical waste that affected groundwater quality on the site. Characterization and monitoring of the vadose zone during FY 1996 comprised primarily spectral gamma logging, soil-gas monitoring, and electrical resistivity tomography. Water-level monitoring was performed to evaluate groundwater-flow directions, to track changes in water levels, and to relate such changes to evolving disposal practices. Water levels over most of the Hanford Site continued to decline between June 1995 and June 1996. Groundwater chemistry was monitored to track the extent of contamination, to note trends, and to identify emerging groundwater-quality problems. The most widespread radiological contaminant plumes were tritium and iodine-129. Smaller plumes of strontium-90, technetium-99, and plutonium also were present at levels above the U.S. Environmental Protection Agency or State of Washington interim drinking water standards. Uranium concentrations greater than the proposed drinking water standard were also observed. Nitrate, fluoride, chromium, carbon tetrachloride, chloroform, trichloroethylene, and cis-1,2-dichlomethylene were present in groundwater samples at levels above their U.S. Environmental Protection Agency or State of Washington maximum contaminant levels. The nitrate plume is the most extensive. Three-dimensional, numerical, groundwater models were applied to the Hanford Site to predict contaminant-flow paths and the impact of operational changes on site groundwater conditions. Other models were applied to assess the performance of three separate pump-and-treat systems.},
doi = {10.2172/481893},
url = {https://www.osti.gov/biblio/481893},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Feb 01 00:00:00 EST 1997},
month = {Sat Feb 01 00:00:00 EST 1997}
}