During demolition work, a building constructed in 1965 requires lead paint testing. If lead is confirmed, what action level triggers additional worker protection requirements?
Correct Answer
A) 30 μg/m³
OSHA's lead standard sets the action level at 30 μg/m³ as an 8-hour time-weighted average. At this level, additional protective measures including medical surveillance and training are required.
Why This Is the Correct Answer
OSHA's lead standard (29 CFR 1926.62) establishes 30 μg/m³ as the action level for construction work, measured as an 8-hour time-weighted average. When airborne lead concentrations reach this threshold, employers must implement additional protective measures including medical surveillance, training programs, and enhanced monitoring. This action level is specifically designed to protect workers before they reach the more dangerous permissible exposure limit of 50 μg/m³.
Why the Other Options Are Wrong
Option B: 25 μg/m³
25 μg/m³ is below the OSHA action level and would not trigger the required additional worker protection measures under the lead standard.
Option C: 50 μg/m³
50 μg/m³ is the permissible exposure limit (PEL), not the action level - this is the maximum allowed exposure, while the action level triggers preventive measures at a lower concentration.
Memory Technique
Think '30 for Action' - the action level of 30 μg/m³ triggers action before reaching the danger zone of 50 μg/m³ PEL.
Reference Hint
OSHA Construction Standards 29 CFR 1926.62 - Lead exposure in construction, or Florida Building Code Chapter on Safety Requirements
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