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Here you'll find tools you can use to interact with other safety professionals. Take our weekly poll, join the EHS forum, or read our free ezines--Safety Daily Advisor and the OSHA Challenge.
Test Your Safety Knowledge and Take the OSHA Challenge!
Every week we'll post a safety-related question. Get the right answer and get on our leader board to win a prize. Want some free points? Refer a friend or colleague and rack up your score!
EHS Forums
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Safety Poll
Is your safety policy manual in good shape?
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OSHA Challenge

OSHA has set standards for workers’ permissible exposure limits (PELs) to airborne hazardous substances. Which of the following is the definition of the ceiling limit?

• The employee's 15-minute time-weighted average exposure, which must not be exceeded at any time during a workday unless another time limit is specified in a parenthetical notation below the limit.
• The employee's maximum allowable average airborne exposure in any 8-hour work shift of a 40-hour workweek.
• An airborne concentration of a toxic substance in the work environment, which should never be exceeded.
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