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Health hazard evaluation report: HETA-88-229-1985, Ormet Corporation, Hannibal, Ohio.

Moss CE; Stephenson RL
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HETA 88-229-1985, 1989 Sep; :1-22
In response to a request, an evaluation was made of possible exposures to magnetic fields and optical radiation among potroom workers at the Ormet Corporation (SIC-3334), Hannibal, Ohio. Ormet had a large aluminum reduction facility with six potrooms, each potroom consisting of two buildings, 100 feet long, housing 86 pots for a total of 1032 pots. The maximum levels of far ultraviolet, near ultraviolet, visible, and infrared radiation were nondetectable, 120 microwatts/square centimeter (cm2), 0.3 candela/cm2, and 190 milliwatts/cm2, respectively. Static magnetic field levels were as high as 1600 gauss at the location of the workers. Infrared radiation and static magnetic field levels were found to exceed the recommended guidelines from the American Conference of Governmental Industrial Hygienists of 10 milliwatts/cm2 and 600 gauss, respectively. The authors conclude that workers may be exposed to excessive levels of infrared radiation and static magnetic fields. Metal rod used to break up slag in the pots were affected by the strong magnetic fields, so that it was necessary for workers to exert considerable force to overcome the attraction to metal objects to use the rods; this may present an ergonomic hazard. The authors recommend specific measures to reduce potentially significant occupational exposures and safety risks at this facility.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; NIOSH-Technical-Assistance-Report; HETA-88-229-1985; Region-5; Hazard-Confirmed; Radiation-exposure; Aluminum-industry; Magnetic-fields; Nonionizing-radiation; Ultraviolet-radiation; Infrared-radiation; Author Keywords: Primary Production of Aluminum; Aluminum; Magnetic Fields; Ultraviolet Radiation; Infrared Radiation; Pot Room
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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