A renovation project involves disturbing lead-based paint in a residential building built in 1955. What is the maximum allowable airborne lead concentration for construction workers?
Correct Answer
C) 50 μg/m³
OSHA's lead standard for construction sets the permissible exposure limit (PEL) at 50 micrograms per cubic meter (μg/m³) as an 8-hour time-weighted average for airborne lead exposure.
Why This Is the Correct Answer
OSHA's lead standard for construction (29 CFR 1926.62) establishes a permissible exposure limit (PEL) of 50 μg/m³ as an 8-hour time-weighted average for airborne lead exposure. This applies specifically to construction activities including renovation work that disturbs lead-based paint. The standard is designed to protect workers from lead poisoning and its associated health effects including neurological damage, kidney problems, and reproductive issues. This limit is strictly enforced during lead abatement and renovation projects.
Why the Other Options Are Wrong
Option A: 100 μg/m³
30 μg/m³ is below OSHA's established PEL for construction workers. While this would provide additional safety margin, it's not the regulatory standard. This might be confused with action levels or more stringent limits used in other industries or by other agencies.
Option B: 200 μg/m³
100 μg/m³ exceeds OSHA's PEL by double the allowable limit. This concentration would require immediate corrective action including enhanced respiratory protection, medical surveillance, and engineering controls. Exposure at this level poses significant health risks to workers.
Memory Technique
Remember 'FIFTY for SAFETY' - OSHA's construction lead PEL is 50 μg/m³, the middle value that keeps workers safe during renovation work.
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