One billion cubic feet of natural gas equivalents, based on a ratio of 6 mcf for each barrel of oil or NGL, which reflects relative energy content.

- Particulate Matter with aerodynamic diameter 2.5 microns or less

– A process that removes hydrogen sulfide, carbon dioxide, and organic sulfur compounds in order to sweeten (reduce the sulfur content of) a gas.

The space between: (1) The casing and the wall of the borehole. (2) Two strings of casing. (3) Tubing and casing.

Abandoned Oil & Gas (wells)

Agency for Toxic Substances and Disease Registry

– A geographic area where the measured concentrations of the criteria pollutants are within the National Ambient Air Quality Standards (NAAQS).

– An emission limitation which is based on the maximum degree of control that can be achieved. It is a case-by-case decision that considers energy, environment, and economic impact. BACT can be add-on control equipment or modification of the production processes or methods.

One stock tank barrel or 42 U.S. gallons liquid volume

One billion cubic feet of gas.