Level A Protection (500 to 1,000 PPM)
Level A protection provides the highest degree of respiratory tract, skin, and eye protection if the inherent limitations of the PPE are not exceeded.
Level A protection provides the highest degree of respiratory tract, skin, and eye protection if the inherent
limitations of the PPE are not exceeded.
Although Level A provides protection against air concentrations greater than 1,000 ppm for most substances, an operational restriction of 1,000 ppm is established as a warning flag to:
- evaluate the need to enter environments with unknown constituents at concentrations greater than 1,000 ppm;
- identify the specific chemical constituents contributing to the total concentration and their associated toxic properties;
- determine more precisely the concentrations of constituent chemicals;
- evaluate the calibration and/or sensitivity error associated with the instruments(s); and
- evaluate instrument sensitivity to wind velocity, humidity, temperature, etc.
Click on the link below to review what a typical Level A ensemble includes.
- positive pressure (pressure demand), self-contained breathing apparatus (SCBA) (NIOSH approved), or positive-pressure supplied air respirator with escape SCBA
- fully encapsulating chemical protective suit
- gloves, inner, chemical resistant
- gloves, outer, chemical resistant
- boots, chemical resistant, steel toe and shank; (depending on suit boot construction, worn over or under suit boot).
Knowledge Check Choose the best answer for the question.
5-8. Which level of protection provides the highest degree of respiratory tract, skin, and eye protection if the inherent limitations of the PPE are not exceeded?
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