Threshold Limit Value - Time Weighted Average (TLV-TWA) describes which of the following?

Threshold Limit Value - Time Weighted Average (TLV-TWA) describes which of the following?

• A. airborne concentrations of substances and represents conditions under which it is believed that nearly all workers may be repeatedly exposed day after day without adverse health effects
• B. concentration to which workers can be exposed continuously for a short period of time provided the daily TLV is also not exceeded
• C. maximum concentration of vapor in air that is NEVER allowed
• D. concentration of vapor in air that must not be exceeded in the work place (8 hours)

Answer: (A)