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HHE determination report no. HHE-77-57-460, Johns-Manville Products Corporation, Vernon, California.
Cincinnati, OH: U.S. Department of Health, Education, and Welfare, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, HHE 77-57-460, 1978 Feb; :1-20
An investigation to determine whether fibrous-glass and crystalline silica (7631869) used in the production of asphalt (8052424) shingles (SIC-2952) are toxic in the concentrations used or found has been performed. For purposes of completeness an attempt was made to evaluate worker exposure to some of the other materials used in the workplace, such as asbestos (1332214), formaldehyde (50000) and asphalt (petroleum). No medical investigation was made. Employees working in and around the shingle manufacturing line are not exposed to excessive levels of fibrous-glass. The slateman is exposed to potentially toxic levels of dust containing crystalline- silica. Employees entering the saturator and working near where petroleum asphalt is heated and fumes are generated are exposed to potentially high levels of benz(a)pyrene (50328). Employees' exposure to asphalt fumes could not be adequately characterized to make a definite conclusion concerning toxicity with the currently available sampling and analytical techniques. Employees' exposures to formaldehyde, toluene (108883) and total aliphatic hydrocarbons are not toxic. The backtender on the rolled line is exposed to asbestos fiber levels in excess of the recommended limit but well below Federal or California State standards.
NIOSH-Author; NIOSH-Health-Hazard-Evaluation; Air-sampling; Air-quality-measurement; Roofing-materials; Air-contamination; Fibrous-glass; Aromatic-hydrocarbons; Organic-solvents; Aldehydes; Polynuclear-hydrocarbons; Fibrous-bodies; Industrial-hygiene; Asphalt-industry; Occupational-health; HHE-77-57-460; Region-9; Hazards-Unconfirmed; Author Keywords: shingle manufacturing; fibrous glass; crystalline silica; petroleum asphalt; benz(a)pyrene; asphalt fumes; formaldehyde; toluene; total aliphatic hydrocarbons
7631-86-9; 8052-42-4; 1332-21-4; 50-00-0; 50-32-8; 108-88-3
Field Studies; Health Hazard Evaluation
NTIS Accession No.
National Institute for Occupational Safety and Health
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division