Mercury control technology assessment study, H-B Instrument Company, Philadelphia, Pennsylvania. Preliminary survey report for the site visit of September 1, 1981.
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 109-20A, 1981 Nov; :1-14
Techniques used to control worker exposure to mercury (7439976) were evaluated at the H-B Instrument Company, Philadelphia, Pennsylvania. The company produced and distributed mercury and spirit filled thermometers, hydrometers, digital thermometers, relays, and thermostats. Forty production workers were employed on site 5 days a week for 8.5 hours a day. Exhaust fans were provided in the thermometer and hydrometer manufacturing area. Three air conditioners were present on the second floor with fresh air intakes. Mercury fillers were large bell jars with flasks for mercury filling situated on top. These were mounted on a stainless steel work bench which had wide seams to prevent mercury from getting in cracks, 1 inch guards to prevent mercury dropping to the floor, and two small drain holes with bottles underneath to collect and dispose of mercury brushed off at the bench. The mercury fill room was isolated from the rest of the area. There were local exhaust hood and vacuum cleaners with charcoal filters. The floor in the manufacturing area was covered in 1980 to reduce absorption of mercury to the wood floors. Personal protective equipment available to the workers includes respirators, gloves, disposable smocks, cloth lab coats, and foot coverings. Work practices, housekeeping, and monitoring (biological and environmental) were discussed. It is concluded that the existing controls appear to be adequate in maintaining vapors of mercury below the 0.1mg/m3 standard. No in depth survey should be conducted at this time.
NIOSH-Survey; Field-Study; Region-3; NIOSH-Contract; Heavy-metals; Mercury-vapors; Control-systems; Control-technology
Field Studies; Control Technology
NTIS Accession No.
National Institute for Occupational Safety and Health
Enviro Control Division, Dynamac Corporation, Rockville, Maryland