| | Coal Dust (greater than or equal to 5% SiO2) |
 | | Coal dusts were shown to be equivocal tumorigenic agents associated with lymphomas and, at the higher dose, adrenal cortex tumors in rats exposed to either 6.6 or 14.9 mg/m(3) for 6 hours/day intermittently for 86 weeks [NIOSH 1991]. |
| | Exposure to coal dust is associated with an increased risk of focal emphysema, which is usually associated with the presence of pneumoconiosis and centrilobular emphysema, which can occur in the absence of pneumoconiosis [Rom 1992]. |
| | Before a worker is placed in a job with a potential for exposure to coal dust, a licensed health care professional should evaluate and document the worker's baseline health status with thorough medical, environmental, and occupational histories, a physical examination, and physiologic and laboratory tests appropriate for the anticipated occupational risks. |
| www.osha.gov /SLTC/healthguidelines/coaldust-greater5percentsio2/recognition.html (3439 words) |
