Regulatory requirements for pressurized (hyperbaric) work environments include:
-Following the guidelines for proper compression of employees as per 6080(a)
-Not subjecting employees to pressure exceeding 50 pounds per square inch. 6080(b)
-Not allowing employees working in compressed air to pass from the working chamber to atmospheric pressure until after decompression, in accordance with 6085, 6090
Exception: the requirements above do not apply in an emergency.
-Controlling decompression of employees as discussed in 6085.
-Decompression of employees in accordance with the specified decompression tables of the U.S. Navy Diving Manual, Volume 2, Chapter 9, 2008
Exception: the last two requirements do not apply in an emergency provided that employees are decompressed in accordance with decompression tables and procedures recommended by the supervising physician.
-Temperature, illumination, sanitation, and ventilation as per 6100. Ventilation in the locks and chambers, with the exception of the medical chamber, shall be such that the air quality meets the requirement of Section 5144(i). Ventilating air shall be not less than 30 cubic feet per minute per person. 6100
-Providing forced ventilation during decompression to ensure a source of fresh air. 6100(f)
-Taking one, or both, of the following steps when an oxygen breathing gas system is used during decompression, to ensure that the concentration of oxygen inside the chamber or lock does not exceed twenty five percent (25%) by volume:
a. The oxygen breathing gas system shall capture the oxygen that is not consumed by the user and directly exhaust it to a well-ventilated area outside of the lock or chamber.
b. An oxygen meter shall be used to continuously monitor the oxygen concentration inside the chamber or lock.
-The employer retaining a supervising physician who shall be available at all times while pressurized work is in progress in order to provide medical supervision of employees employed in compressed air work
-Following fire prevention and oxygen safety requirements as specified in 6115