Section 325.62108. Welding, cutting, or heating of metals of toxic significance.

(1) Welding, cutting, or heating in any enclosed spaces involving the following metals shall be performed with either general mechanical or local exhaust ventilation meeting the requirements of R 325.62106:

(a)   Zinc-bearing base or filler metals or metals coated with zinc-bearing materials.

(b)   Lead base metals.

(c)   Cadmium-bearing filler materials.

(d)  Chromium-bearing metals or metals coated with chromium-bearing materials.

(2)   Welding, cutting, or heating in any enclosed spaces involving the following metals shall be performed with local exhaust ventilation in accordance with the requirements of R 325.62106, or employees shall be protected by air-line respirators in accordance with the requirements of Occupational Health Standard Part 451 ‘Respiratory Protection,’ as referenced in R 325.62102:

(a)   Metals containing lead, other than as an impurity, or metals coated with lead-bearing materials.

(b)   Cadmium-bearing or cadmium-coated base metals.

(c)   Metals coated with mercury-bearing metals.

(d)    Beryllium-containing base or filler metals. Because of its high toxicity, work involving beryllium shall be done with both local exhaust ventilation and air-line respirators.

(3)    Employees performing operations in the open air shall be protected by filter-type respirators in accordance with the requirements of Occupational Health Standard Part 451

‘Respiratory Protection,’ except that employees performing operations on beryllium- containing base or filler metals shall be protected by air-line respirators in accordance with the requirements of Occupational Health Standard Part 451 ‘Respiratory Protection,’ as referenced in R 325.62102.

(4)   Other employees exposed to the same atmosphere as the welders or burners shall be protected in the same manner as the welder or burner.

History: 2014 AACS.