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Industrial hygiene survey report at Rockwool Industries, Inc., in Pueblo, Colorado.

Fowler DP
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, IWS 35-30, 1977 Aug; :1-81
Worker exposures to mineral wool were surveyed at Rockwool Industries, Incorporated (SIC-3296) in Pueblo, Colorado from September 20 to 25, 1976. The facility employed 100 production and maintenance workers. The factory operated three shifts 7 days per week. First aid was given by supervisors. The factory gave pre- employment examinations and periodic examinations were given only in specific circumstances. No full time safety or industrial hygiene programs existed. Personal protective equipment included safety helmets, protective footgear and hearing devices, face shields, and respirators. The time weighted average (TWA) fiber counts ranged from 0.038 to 234 fibers per cubic centimeter (f/cc) The TWA total airborne particulate concentrations ranged from 0.176 to 1.915 milligrams per cubic meter (mg/m3). Individual fiber counts ranged from 0 to 213f/cc. Individual total airborne particulate concentrations ranged from 0.036 to 4.384mg/m3. Respirable particulate concentrations ranged from 0.02 to 0.462mg/m3. Zinc (7440666), manganese (7439965) and lead (7439921) concentrations ranged from less than detectable to 713 micrograms per cubic meter (micrograms/m3), from less than detectable to 92 micrograms/m3, and from less than 1 to 348 micrograms/m3, respectively. The count median fiber diameters ranged from 1.2 to 2.0 micrometers and count median lengths ranged from 6.7 to 20 micrometers. Carbon-monoxide (630080) concentrations ranged from 4 to 30 parts per million which were below the 50ppm OSHA limit. Noise levels ranged from 76 to 110 decibels. The author notes that fiber exposures were relatively low; total particulate exposures occasionally approach the nuisance dust limit; and exposures to airborne lead and noise occasionally exceeded current limits. He recommends continuation of engineering control measures and the institution of respirator training and hearing conservation programs.
NIOSH-Contract; Field-Study; Region-8; Workplace-studies; Industrial-hygiene; Occupational-health-programs; Protective-equipment; Air-contamination; Air-quality-measurement; Standards
7440-66-6; 7439-96-5; 7439-92-1; 630-08-0
Publication Date
Document Type
Field Studies; Industry Wide
Funding Type
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
IWS-35-30; Contract-210-76-0120
NIOSH Division
SIC Code
Source Name
National Institute for Occupational Safety and Health
Performing Organization
Stanford Research Institute, Menlo Park, California
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division