Definitions

Acronym / Mnemonic Description
ppb parts per billion
ppm parts per million
µgm-3 micrograms per cubic metre
NEPM National Environmental Protection Measure
SEPP State Environment Protection Policy
EPA Environment Protection Authority of Victoria
PM10 Particle Matter less than 10 micron
PM2.5 Particle matter less than 2.5 micron
LVD Local Visual Distance (measured in kilometres)
NO2 Nitrogen Dioxide (measured in ppb)
SO2 Sulphur Dioxide (measured in ppb)
O3 Ozone (measured in ppb)