Health hazard evaluation determination report No. MHETA 81-108-9004
Employee exposure to diesel emissions at the Climax Molybdenum Company Mine (SIC-1061) in Climax, Colorado was investigated. The study was requested by the Oil, Chemical, Atomic Workers Union and was performed on September 23 and 24, 1981. The mine employed about 1200 people in underground operations. Environmental air samples were taken for nitrogen-dioxide (10102440), sulfur-dioxide (7446095), polynuclear aromatic compounds, formaldehyde (50000) respirable particulates and free silica (14808607), carbon-monoxide (630080), and carbon-dioxide (124389). Seventy four percent of the environmental samples collected for diesel particulates contained an average of 0.3 percent polynuclear aromatic compounds by weight as the cyclohexane soluble fraction. Thirty six percent of the free silica samples equaled or exceeded the NIOSH recommended limit of 0.05 milligrams per cubic meter. An average of 0.26 parts per million of nitrogen-dioxide was present, although long term exposures may have exceeded the NIOSH recommended limit of 1 part per million. The remaining substances were either not detected or were well below the recommended criteria. The authors conclude that the potential for a health hazard exists from exposure to free silica and polynuclear compounds.
- Research Organization:
- National Inst. for Occupational Safety and Health, Morgantown, WV (USA)
- OSTI ID:
- 6818253
- Report Number(s):
- PB-84-148501
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
570000 -- Health & Safety
99 GENERAL AND MISCELLANEOUS
AIR POLLUTION
ALDEHYDES
AROMATICS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
DIESEL ENGINES
ENGINES
EXHAUST GASES
FLUIDS
FORMALDEHYDE
GASEOUS WASTES
GASES
HEAT ENGINES
HYDROCARBONS
INDOOR AIR POLLUTION
INDUSTRIAL MEDICINE
INDUSTRY
INSPECTION
INTERNAL COMBUSTION ENGINES
MEDICINE
MINERAL INDUSTRY
MINERALS
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PARTICULATES
POLLUTION
POLYCYCLIC AROMATIC HYDROCARBONS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES