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Health hazard evaluation report: HETA-96-0119-2586, Melroe Company, Bismarck, North Dakota.

Moss CE
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, HETA 96-0119-2586, 1996 Jul; :1-13
In response to a management request, a followup evaluation was conducted of optical radiation levels after changes made in the plasma arc cutting (PAC) operations at the Melroe Company (SIC- 3531), Bismarck, North Dakota. The company used PAC in manufacturing skid steer loaders. Measurements were taken of the visible and infrared radiation levels under different operating conditions. Measurements of luminance levels around two of the three PAC units operating at 20 amperes indicated the maximum luminance level documented was 33 candelas per square centimeter when a cut was made along the edge of the metal. This level exceeds guidelines. The maximum infrared radiance level was less than 2 milliwatts per square centimeter at a distance of 8 feet from the arc, which was the closest position the workers would stand while the PAC units were operating. This level was below guidelines. No ultraviolet radiation measurements were made during a second visit as most of the systems used absorb appropriately in this region. Some Melroe workers reported erythemal responses when performing edge cutting. The author concludes that workers were exposed to visible radiation which exceeded occupational limits. The author recommends the use of protective eyewear with at least a shade 4/5 filter.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-96-0119-2586; Region-8; Hazard-Confirmed; Eye-damage; Welders; Welding-industry; Radiation-exposure; Nonionizing-radiation; Infrared-radiation; Eye-protection; Personal-protective-equipment; Arc-welding; Author Keywords: Construction Machinery and Equipment; infrared radiation; plasma arc cutting; optical radiation; welding
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Field Studies; Hazard Evaluation and Technical Assistance
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National Institute for Occupational Safety and Health
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division