§ 97.203 Measurements, abbreviations, and acronyms.

Measurements, abbreviations, and acronyms used in this subpart and subparts BBB through III are defined as follows:

Btu—British thermal unit.

CO₂—carbon dioxide.

H₂O—water.

Hg—mercury.

hr—hour.

kW—kilowatt electrical.

kWh—kilowatt hour.

lb—pound.

mmBtu—million Btu.

MWe—megawatt electrical.

MWh—megawatt hour.

NO_X—nitrogen oxides.

O₂—oxygen.

ppm—parts per million.

scfh—standard cubic feet per hour.

SO₂—sulfur dioxide.

yr—year.