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.
NOX-nitrogen oxides.
O2-oxygen.
ppm-parts per million.
scfh-standard cubic feet per hour.
SO2-sulfur dioxide.
yr-year.
40 C.F.R. §97.203