1. a) The following abbreviations are used in this Part:

   BTU or btu	British thermal units
   ft	foot
   gr	grains
   J	Joule
   kg	kilogram
   kg/MW-hr	kilograms per megawatt-hour
   km	kilometer
   lbs	pounds
   lbs/mmBtu	pounds per million Btu
   m	meter
   mg	milligram
   Mg	megagram, metric ton or tonne
   mi	mile
   mmBtu	million British thermal units
   mmBtu/hr	million British thermal units per hour
   MW	megawatt; one million watts
   MW-hr	megawatt-hour
   ng	nanogram; one billionth of a gram
   ng/J	nanograms per Joule
   ppm	parts per million
   scf	standard cubic foot
   scm	standard cubic meter
   T	English ton

2. b) The following conversion factors have been used in this Part:

   English	Metric
   2.205 lb	1 kg
   1 T	0.907 Mg
   1 lb/T	0.500 kg/Mg
   mmBtu/hr	0.293 MW
   1 lb/mmBtu	1.548 kg/MW-hr
   1 mi	1.61 km
   1 gr/scf	2289 mg/scm

(Source: Amended at 39 Ill. Reg. 16174, effective December 7, 2015)