The respirator will be used at the following altitude and oxygen level:

If you do not know the oxygen level, assume that it is < 16.0%.

Altitude (feet)

<3001
3001-4000
4001-5000
5001-6000
6001-7000
7001-8000
> 8000
>14,000

 Oxygen level (%)

< 16.0
16.0-16.4
16.5-17.1
17.2-17.8
17.9-18.5
18.6-19.3
19.4-19.5
>19.5 (this is not oxygen deficient)
Check here if there are hazardous contaminants in the workplace atmosphere (in addition to the oxygen deficiency) above the PEL.

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