CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 97—FEDERAL NO X BUDGET TRADING PROGRAM AND CAIR NO X AND SO 2 TRADING PROGRAMS > SUBPART AAAA—CAIR NO X Ozone Season Trading Program General Provisions (§97.301 to §97.308) > 97.303—Measurements, abbreviations, and acronyms.

97.303—Measurements, abbreviations, and acronyms.

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

Btu—British thermal unit.

Code of Federal Regulations

CO2—carbon dioxide.

Code of Federal Regulations

H2O—water.

Hg—mercury.

hr—hour.

kW—kilowatt electrical.

kWh—kilowatt hour.

lb—pound.

mmBtu—million Btu.

MWe—megawatt electrical.

MWh—megawatt hour.

Code of Federal Regulations

NOX—nitrogen oxides.

Code of Federal Regulations

O2—oxygen.

ppm—parts per million.

scfh—standard cubic feet per hour.

Code of Federal Regulations

SO2—sulfur dioxide.

yr—year.