干旱区生态环境知识资源中心(Arid): Hanford Site groundwater monitoring for fiscal year 1996

Arid

DOI	10.2172/481893
报告编号	PNNL--11470
来源ID	OSTI_ID: 481893
	Hanford Site groundwater monitoring for fiscal year 1996
	Hartman, M.J.; Dresel, P.E.; Borghese, J.V. [eds.] [and others]
英文摘要	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.
出版年	1997
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	05 NUCLEAR FUELS ; 54 ENVIRONMENTAL SCIENCES ; HANFORD RESERVATION ; SITE CHARACTERIZATION ; REMEDIAL ACTION ; GROUND WATER ; MONITORING ; RADIONUCLIDE MIGRATION ; RADIOISOTOPES ; RADIOECOLOGICAL CONCENTRATION
URL	http://www.osti.gov/scitech/servlets/purl/481893
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/267050
推荐引用方式 GB/T 7714	Hartman, M.J.,Dresel, P.E.,Borghese, J.V. [eds.] [and others]. Hanford Site groundwater monitoring for fiscal year 1996,1997.