CDPH Lead Inspector/Assessor California State Practice Exam

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How is the permissible exposure limit (PEL) adjusted for an employee exposed to lead for more than 8 hours?

Multiply by the hours worked
Divide 400 by the hours worked
Set a fixed exposure limit regardless of hours
Increase exposure limit by 20%

The correct answer is: Divide 400 by the hours worked

The permissible exposure limit (PEL) for lead is designed to protect workers from the harmful effects of lead exposure over time. When an employee is exposed to lead for a duration longer than the standard 8-hour work shift, the PEL must be adjusted to ensure their safety. The correct approach is to divide a specified value (400) by the total hours worked that exceed the standard exposure limit. This calculation reflects the principle that the longer an individual is exposed to a hazardous substance like lead, the lower the acceptable level of exposure needs to be to account for the increased risk. By using this method, the exposure limit is adjusted based on the duration of exposure, providing a tailored level of safety for individuals who may work longer hours. This balancing act is crucial for minimizing health risks as prolonged exposure can significantly increase the likelihood of lead-related health problems. The other options do not take into account the need for such a dynamic adjustment based on varying exposure times, which is fundamental in occupational health standards.