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Overexposure rates for metal/nonmetal industry based on MSHA data from 1995 to 2009.
| Sand and gravel | Stone quarries | Metal mining | ||||
|---|---|---|---|---|---|---|
| Occupation | No. samples > PEL | Total samples | No. samples > PEL | Total samples | No. samples > PEL | Total samples |
| Laborer | 202 (20%) | 1,032 | 176 (14%) | 1,276 | 20 (37%) | 54 |
| Mechanic | 17 (11%) | 149 | 13 (8%) | 160 | 10 (21%) | 48 |
| Utility man | 24 (9%) | 272 | 98 (13%) | 766 | 8 (47%) | 17 |
| Cleanup man | 117 (23%) | 518 | 82 (17%) | 476 | 13 (38%) | 34 |
