What is the first step to take before wearing a tight-fitting respirator for pesticide application?

The first step to take before wearing a tight-fitting respirator for pesticide application is to perform seal check(s). This step is crucial because a proper seal ensures that the respirator will function effectively to protect the user from inhaling harmful pesticide vapors, dust, or aerosols.

A tight-fitting respirator relies on a solid seal around the face to prevent contaminated air from leaking in. Performing a seal check allows the user to verify that the respirator is fitted properly and is forming an adequate seal against the face. This process typically involves inhaling and exhaling while wearing the respirator to check for air leaks around the edges. If any air is felt escaping, adjustments can be made to achieve a better fit.

The importance of this step is underscored by the fact that even minor compromises in the seal can significantly reduce the effectiveness of the respirator, putting the wearer at risk. While inspecting the respirator for damage, replacing the filters, and ensuring a comfortable fit are also important considerations, they should be addressed after verifying the seal, as having a proper seal is the first priority for adequate respiratory protection during pesticide application.