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Mercury control technology assessment study, Oak-Mitsui Corporation, Hoosick Falls, New York, in-depth survey report for the site visit of February 17-18, 1982.
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, ECTB 109-24b, 1982 Jun; :1-23
An on site visit was made to the Oak-Mitsui Corporation, Hoosick Falls, New York to evaluate control systems in place to protect workers from exposures to elemental mercury (7439976) and mercury compounds. The facility manufactured copper foil for use in printed circuit board production. Major renovations have been made for improved mercury control including cooling jackets for mercury wells, local exhaust for mercury wells, and substitution of rotary contact devices for some mercury wells. A major mercury cleanup involving vacuuming and decontamination was conducted in August of 1980. Sixteen of the facility's 160 workers had a potential for mercury exposure on the job. A tour of the copper foil manufacturing operation was made and information on mercury controls obtained. Personal and area samples for mercury vapor indicated that the highest time weighted average personal exposure measured was 0.026mg/m3, well below the OSHA personal exposure limit of scale mercury cleanup, substitution for mercury when possible, temperature control, and enclosure and ventilation of mercury point sources. This facility did not rely on dilution ventilation for mercury control. On cold days, this enabled this facility to shut down its air supply system and have no negative impact on mercury vapor levels. The use of mechanical rotary contact devices, in addition to reducing mercury levels, also significantly reduced mercury usage, resulting in a cost benefit.
NIOSH-Author; NIOSH-Survey; Field-Study; Region-2; NIOSH-Contract; Mercury-compounds; Air-quality-monitoring; Personal-protective-equipment; Electronic-equipment; Control-technology; Ventilation-systems
Field Studies; Control Technology
NTIS Accession No.
National Institute for Occupational Safety and Health
Enviro Control Division, Dynamac Corporation, Rockville, Maryland
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division