DNAPL site characterization. Fact sheet
Dense nonaqueous phase liquids (DNAPLs), such as some chlorinated solvents, coal tar wastes, creosote based wood-treating oils, and some pesticides, are immiscible fluids with a density greater than water. As a result of widespread production, transportation, use, and disposal of hazardous DNAPLs, particularly since 1940, there are numerous DNAPL contamination sites in North America. The potential for significant long-term groundwater contamination by DNAPL chemicals at many sites is high due to their toxicity, limited solubility (but much higher than drinking water limits), and significant migration potential in soil gas, groundwater, and/or as a separate phase liquid, DNAPL chemicals, particularly chlorinated solvents, are among the most prevalent groundwater contaminants identified in groundwater supplies and at waste disposal sites.
- Research Organization:
- Environmental Protection Agency, Washington, DC (United States). Office of Emergency and Remedial Response
- OSTI ID:
- 6970054
- Report Number(s):
- PB-94-963317/XAB; EPA--540/F-94/049
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
AROMATICS
CONTROL
ENVIRONMENTAL TRANSPORT
GROUND WATER
HYDROGEN COMPOUNDS
LAWS
MASS TRANSFER
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION LAWS
SITE CHARACTERIZATION
US SUPERFUND
WATER
WATER POLLUTION CONTROL