Table 12-9
Maximum Concentration for Some Common Contaminants in
Saturation Complex Atmospheres
(Surface equivalent values)
Carbon Dioxide
5000 ppm (3.8 mmHg) (.005 ATA)
Carbon Monoxide
10 ppm
Methane
1000 ppm
Methanol
200 ppm
Total Hydrocarbons
10 ppm
(less Methane)
Benzene
1 ppm
Halogenated Hydrocarbons
1 ppm
Oil Mist
5 mg/m3
Particulate Matter* (no oil
1 mg/m3
mist present)
*Particulate matter is measured concurrently with oil mist vapor. If
under microscopic examination particles other than lint, steel parti-
cles, iron oxide or carbon particles are seen every effort should be
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