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Environmental Management Community
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Here you'll find tools you can use to interact with other environmental professionals. Take our weekly poll, join the EHS forum, check out our EHS cartoons, or take the OSHA Challenge.
Enviro Conferences
Be sure to check the Events and Conferences page for this year's most popular conferences in the Environmental, Health, and Safety industry.
EHS Forums
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Environmental Poll
Do you offer training on conserving energy at your facility?
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.
Take this week's OSHA Challenge
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