Calculate the MUC for a Full face respirator with a PEL of 50 ug/m3.

To determine the Maximum Use Concentration (MUC) for a full-face respirator, it is necessary to understand how the MUC is calculated relative to the Permissible Exposure Limit (PEL). The MUC is typically calculated by multiplying the PEL by the assigned protection factor (APF) of the respirator.

For full-face respirators, the general assigned protection factor is often between 10 and 1000, depending on the specific type of respirator and the guidelines in place. If we apply an APF of 50, which is common for full-face respirators, the calculation would be as follows:

MUC = PEL x APF

MUC = 50 µg/m³ x 50

MUC = 2500 µg/m³

This calculation shows that the Maximum Use Concentration for a full-face respirator with a PEL of 50 µg/m³ should be 2500 µg/m³. This supports the correct answer, indicating an understanding of both the concept of PEL and how it interacts with the APF of personal protective equipment.

Understanding this relationship is crucial for ensuring that respirators are used effectively to protect workers from hazardous airborne contaminants.