HAZMAT

Question 1

What are the 3 ways that Occupational Exposure values be expressed?

Answer 1

• Time-Weighted Average (TWA)
• Short-Term Exposure Limit (STEL)
• Peak Limitation Value (PLV)

Question 2

What is a time-weighted average?

Answer 2

An averaged concentration worker’s may be repeatedly exposed to without adverse effect, based on 8-hour working day, 5-day working week.

Question 3

What is Short Term Exposure Limit?

Answer 3

A concentration which workers can be exposed to for up to 15 minutes at a time without suffering irritation, irreversible tissue damage or narcosis.

Question 4

What is Peak Limitation Value?

Answer 4

A concentration that, if exceeded, indicates the atmosphere is considered occupationally unacceptable.

Question 5

What can alter atmosphere to make it hazardous?

Answer 5

• Flammable gas/vapour
• High oxygen
• Low oxygen
• Toxic or corrosive
• Radioactivity
• Particulates

Question 6

What is DANGER?

Answer 6

• Do not enter smoke, gas or vapour clouds
• Approach carefully from upwind and uphill
• No closer than 70m from the affected area
• Gather information by observation from a safe distance
• Examine more closely, only if necessary and using SCBA
• Respond according to the information gathered

Question 7

What are the four essential questions in a HAZMAT operation?

Answer 7

1. What is the material?
2. How can it affect me?
3. How can I protect myself from it?
4. How can we deal with it?