Respiratory protection devices are available in two basic design types: Air-Purifying Respirators (APR) and Supplied-Air Respirators (SAR). As a trained hazardous materials specialist, your employer asks you to evaluate each of the following four possible workplace conditions:
Fiberglass components are being sanded smooth prior to painting by assembly line workers.
A leak in a nitrogen supply line within a service closet requires repair but the supply of nitrogen cannot be interrupted.
Hydrochloric acid vapor is escaping from a cylinder stored in an outdoor area. Oxygen levels are measured and found to be above 19.5%.
A full 55-gallon drum of an organic solvent commonly used in the production process is releasing vapor.