Cal. Code Regs. Tit. 8, § 6105 - Compressor Plant, Air Supply and Telephone Communication
(a) There shall at all times be a qualified
gauge tender on duty at the air control valves to regulate the pressure in the
working areas. During tunneling operations, one gauge tender may regulate the
pressure in not more than two headings provided that the gauges and controls
are all in one location. In caisson work there shall be a gauge tender for each
caisson.
(b) The low air compressor
plant shall be of sufficient capacity to not only permit the work to be done
safely, but shall provide a margin to meet anticipated emergencies and
repairs.
(c) Low air compressor
units shall have at least two independent and separate sources of power supply.
Each independent and separate source of power supply shall be capable of
operating the entire low air plant and its accessory systems.
(d) The capacity, arrangement, and number of
compressors shall be sufficient to maintain the necessary pressure without
overloading the equipment and to assure maintenance of such pressure in the
working chamber during periods of breakdown, repair, or emergency.
(e) Switching from one independent source of
power supply to the other shall be done periodically to ensure the workability
of the apparatus in an emergency.
(f) Duplicate low pressure air feed lines and
regulating valves shall be provided between the source of air supply and a
point beyond the locks with one of the lines extending to within 100 feet of
the working face.
(g) To prevent
rapid decompression all air supply lines shall be equipped with check
valves.
(h) Low pressure air shall
be regulated automatically. In addition, manually operated valves shall be
provided for emergency conditions.
(i) The air intakes for all air compressors
shall be located at a place where fumes, exhaust gases, and other air
contaminants will be at a minimum.
(j) Gauges indicating the pressure in the
working chamber shall be installed in the compressor building, the lock
attendant's station, and at the Field Office of the employer's
representative.
(k) There shall be
effective communication at all times between the following:
(1) The working chamber face;
(2) The working chamber side of the air lock
near the door;
(3) The interior of
the air lock;
(4) Lock attendants
station;
(5) The compressor
plant;
(6) The first-aid
station;
(7) The emergency lock (if
one is required);
(8) The special
decompression chamber (if one is required).
Notes
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.
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