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Can an ambient air respirator be used in environments that are Immediately Dangerous to Life and Health (IDLH)?

April 26, 2017air Ambient dangerous environments Health idlh immediately life respirator Used

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Can an ambient air respirator be used in environments that are Immediately Dangerous to Life and Health (IDLH)?

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A. No. The only options in an IDLH environment are a pressure demand airline respirator with an escape bottle or a Self-Contained Breathing Apparatus (SCBA). Ambient air pumps should only be used in locations containing at least 19.5% oxygen.