Modeling Subsurface Petroleum Hydrocarbon Transport


BTEX	An acronym that represents benzene, toluene, ethylbenzene and xylene.
ERD	Ecosystems Research Division, National Exposure Research Laboratory, Office of Research and Development, United States Environmental Protection Agency.
Immiscible	Liquids that don't mix are said to be immiscible. Oil and water are often cited as an example.
MTBE	methyl tert-butyl ether.
NERL	National Exposure Research Laboratory, Office of Research and Development, United States Environmental Protection Agency.
LUST	leaking underground storage tank.
Nonaqueous phase liquid (NAPL)	A water-immiscible liquid that can cause ground water contamination. This term is unique to ground water contaminant hydrology. The common examples are fuels, chlorinated solvents, creosote and coal tar. A NAPL may be less dense than water--a Light Nonaqueous Phase Liquid (LNAPL), or it may be denser than water--a Dense Nonaqueous Phase Liquid (DNAPL).
UST	underground storage tank.

Page author: Jim Weaver, of U.S. EPA, Office of Research and Development, Athens, Georgia who last modified this content on: January 6, 2004