You are the agency construction manager on a multiple-prime contracting project. The local municipality has a law which requires all jobsite personnel to wear a P100 respirator when dust or chemical fumes are present. During construction, a mechanical contractor's team is working with powerful cleaning solvents that emit toxic fumes. The mechanical team are all wearing the correct respirators. However, you notice a worker for a different electrical contractor is performing a separate activity in the same area without a respirator. A spare respirator is not available. Your best immediate response is to:

You are the agency construction manager on a multiple-prime contracting project. The local municipality has a law which requires all jobsite personnel to wear a P100 respirator when dust or chemical fumes are present. During construction, a mechanical contractor's team is working with powerful cleaning solvents that emit toxic fumes. The mechanical team are all wearing the correct respirators. However, you notice a worker for a different electrical contractor is performing a separate activity in the same area without a respirator. A spare respirator is not available. Your best immediate response is to:

• A. Stop all work and notify the mechanical contractor
• B. Stop the electrical worker and notify the electrical contractor
• C. Stop all work and notify the electrical contractor
• D. Stop the electrical worker and notify the mechanical contractor

Answer: (B)

The situation tests how to enforce mandatory respiratory protection and quickly reduce exposure risk. When a hazard is present and a worker is without the required P100 respirator, the immediate priority is to stop that worker’s activity to prevent exposure and to involve the responsible contractor to fix the PPE gap. Here, the mechanical team is already wearing the correct respirators, but a worker from the electrical contractor is performing the task in the same hazardous area without a respirator, and there’s no spare respirator available. Stopping the electrical worker removes the immediate source of unprotected exposure, and notifying the electrical contractor prompts them to provide a respirator, substitute tasks, or pause work until proper protection is secured. This targeted action minimizes risk without halting all operations unnecessarily. Why not stop all work? Because the hazard is specific to the unprotected worker, and other crews are properly protected, so the safest, quickest fix is to address the single noncompliant worker and get the PPE issue resolved. Notifying the electrical contractor directly ensures the responsible party handles PPE compliance and any required reassignment or pause of their work.

The situation tests how to enforce mandatory respiratory protection and quickly reduce exposure risk. When a hazard is present and a worker is without the required P100 respirator, the immediate priority is to stop that worker’s activity to prevent exposure and to involve the responsible contractor to fix the PPE gap.

Here, the mechanical team is already wearing the correct respirators, but a worker from the electrical contractor is performing the task in the same hazardous area without a respirator, and there’s no spare respirator available. Stopping the electrical worker removes the immediate source of unprotected exposure, and notifying the electrical contractor prompts them to provide a respirator, substitute tasks, or pause work until proper protection is secured. This targeted action minimizes risk without halting all operations unnecessarily.

Why not stop all work? Because the hazard is specific to the unprotected worker, and other crews are properly protected, so the safest, quickest fix is to address the single noncompliant worker and get the PPE issue resolved. Notifying the electrical contractor directly ensures the responsible party handles PPE compliance and any required reassignment or pause of their work.