What level of PPE should be worn when no known atmospheric hazards are present?

When no known atmospheric hazards are present, the appropriate level of personal protective equipment (PPE) to wear is Level D. This level of PPE is designed for situations where there is no risk of inhaling harmful chemicals, and it is suitable for environments where only nuisance dusts and particulates may be present.

Level D PPE typically includes standard work clothing, safety glasses, and gloves, providing a basic level of protection without additional respiratory protection. It is ideal for routine work tasks in environments that are considered low-risk, allowing workers to maintain comfort and ease of movement while still being adequately protected against minor risks.

In contrast, the other levels of PPE are designed for different situations where the risk of exposure to hazardous materials is greater. Level A provides the highest level of protection and is used in environments with known, very hazardous chemicals, requiring a fully encapsulated suit and self-contained breathing apparatus. Level B is also a high-level protection but is used when there is a high risk of exposure to hazardous chemicals, though the exact nature is known (requiring respiratory protection but not necessarily an encapsulated suit). Level C is used when the atmosphere is similar to that of Level D but additional respiratory protection is required due to the presence of airborne contaminants or hazards that