LAC 43:XI.4335. Vents (Formerly §1335)

A. Carbon dioxide may not be relieved into the atmosphere of a building or other confined space where hazardous levels of carbon dioxide might accumulate above the human exposure level set by the United States Department of Labor, Occupational Safety and Health Administration as depicted in the following table, unless the appropriate respiratory protection is provided. Condition | Minimum Respiratory Protection Required above 5000 vppm Gas concentration 50,000 vppm or less | Any supplied air respirator or self-contained respirator. Greater than 50,000 vppm or entry and escape from unknown concentrations | Self-contained breathing apparatus with a full face-piece operated in pressure demand or other positive pressure mode. A combination respirator which includes a Type C supplied-air respirator with a full facepiece operated in pressure-demand or positive pressure or continuous flow mode and an auxiliary self-contained breathing apparatus operated in pressure-demand or other positive pressure mode. Fire Fighting | Self-contained breathing apparatus with a full face-piece operated in pressure-demand or other positive pressure mode. Escape | Any escape self-contained breathing apparatus B. Venting of carbon dioxide fluid under operational control which could produce a hazardous gas atmosphere must be directed to a stack or exhaust pipe elevated to assure dispersion designed to avoid ground level or working level accumulations hazardous to personnel.