Threshold Limit Value
TLV- Airborne concentrations to which nearly all workers may be routinely exposed without adverse health effects.
T WA- Time Weighted Average. Based on an 8 hour exposure and assumes a 40 hour work week.
STEL - Short Term Exposure Limit(4/15/60)
C - Ceiling Limit(should never be exceeded)
IDLH- Immediately Dangerous to Life and Health
Skin - Capable of cutaneous skin absorption