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This study is an evaluation of the potential environmentalimpacts of contaminated groundwater from the ASARCO metals refiningfacility adjacent to the Missouri River in Omaha, Nebraska. Surfacewaters, sediments, and sediment pore waters were collected from theBurt-Izard drain, which transects the facility, and from the Missouri Riveradjacent to the facility. Groundwater was also collected from thefacility. Waters and sediments were analyzed for inorganic contaminants,and the toxicity of the waters was evaluated with the Ceriodaphnia dubia7-day test. Concentrations of several elemental contaminants were highlyelevated in the groundwater, but not in river sediment pore waters. Leadconcentrations were moderately elevated...
Razorback suckers (Xyrauchen texanus) and Colorado pikeminnow (Ptychocheilus lucius) are two endangered species of cyprinids located in the San Juan River Basin. Numerous factors may be contributing to the decline of these fish populations including hydraulic alterations (impoundment; altered thermal and hydrological regimes), non-native species interactions and contaminants. An assessment of the physical (temperature, substrate, ultraviolet [UV] radiation), biological (macroinvertebrates), and chemical factors (metals, polycyclic hydrocarbons, other water quality factors) was conducted to determine whether these factors could be limiting populations at six sites within the San Juan River and at one site in Los...
Aqueous slurries of a test sediment spiked withdibenz[a,h]anthracene, 2,4,5,2',4',5'-hexachlorobiphenyl, p.p'-DDE, orphenanthrene were subjected to decontamination experimentation. The spikedsediments were agitated at elevated temperatures for at least 96 hours inthe presence of either of the two contaminant-absorbing media: clusters ofpolyethylene membrane or lipid-containing semipermeable devices (SPMDs).The effects of treatment temperature and surface area of media on theremoval of contaminants were explored. This work is part of a largermethodology for whole-sediment toxicity identification evaluation (TIE). Amethod is being sought that is capable of detoxifying sediments withrespect to organic contaminants...
The assessment of contaminant stressors on biota of the Rio Grande/Rio Bravo resulted from an effort of the Biomonitoring for Environmental Status and Trends (BEST) program, to implement pilot projects to evaluate environmental contaminants and their effects on ecosystems. This study resulted in a database of approximately 2,600 concentration values that were georeferenced for use with Geographic Information Systems such as ArcView. The data and common domain software as well as other layers of information were incorporated into a CD-ROM that wildlife managers and biologists could use to query and obtain information on contaminants in biota of the Rio Grande/Rio Bravo. The database contains information on contaminants...
The National Contaminant Biomonitoring Program (NCBP), which was developed and maintained by the U.S. Fish and Wildlife Service (FWS), monitored concentrations of environmental contaminants in freshwater fish over a period of about 20 years. Beginning in the 1960s as a component of the multi-agency National Pesticide Monitoring Program (NPMP) and continuing through the mid-1980s, freshwater fish were periodically collected from a national network of stations for analysis of pesticides, PCBs, and other contaminants. The NPMP/NCBP database of contaminant concentrations is the most extensive of its kind, unique in its breadth and depth with respect to environmental contaminant concentrations in fish. The data and information...
The National Contaminant Biomonitoring Program (NCBP), which was developed and maintained by the U.S. Fish and Wildlife Service (FWS), monitored concentrations of environmental contaminants in fish and wildlife over a period of about 20 years. Beginning in the 1960s as a component of the multi-agency National Pesticide Monitoring Program (NPMP) and continuing through the mid-1980s, fish and wildlife were periodically collected from a national network of stations for analysis of pesticides, PCBs, and other contaminants. The NPMP/NCBP database of contaminant concentrations is the most extensive of its kind, unique in its breadth and depth with respect to environmental contaminant concentrations. The data and information...
Categories: Data;
Tags: NCBP,
Organochlorine insecticides,
PCBs,
Polychlorinated biphenyls,
United States,
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