Measurements, abbreviations, and acronyms used in this subpart and subparts BBBB through IIII 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
NOX - nitrogen oxides
O2 - oxygen
ppm - parts per million
scfh - standard cubic feet per hour
SO2 - sulfur dioxide
yr - year
[71 FR 25392, Apr. 28, 2006]