Section 5-5. Requirements relating to breathing air from filling plant

As far as possible, breathing air from the filling plant must be free of contaminants and be tasteless and odourless. The following values shall not be exceeded:
  1. a.
    10 ppm (11 mg/m3) carbon monoxide (CO)
  2. b.
    500 ppm (900 mg/m3) carbon dioxide (CO2)
  3. c.
    1 mg/m3 oil
  4. d.
    50 mg/m3 water for cylinders with a filling pressure of 200 bar and 30 mg/m3 water for cylinders with a filling pressure of 300 bar
The O2 content shall be 21.0% +/- 0.5%.