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Dust Underfoot - Enclosed Cab-Floor Heaters Can Significantly Increase Operator’s Respirable Dust Exposure
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    Many types of heavy equipment used in the mining and construction industries use enclosed cabs to protect equipment operators from dust and noise exposure. Normally, when the equip- [ ] ment is new, manufacturers' deigned controls are effective at keeping the operator's exposure at acceptable level. However, as equipment becomes older and many components of the enclosure deteriorate, such as gaskets and seals, the effectiveness of the enclosed cab can be greatly reduced. This can cause excessive and dangerous exposures to respirable dust, especially when the ore or overburden contains crystalline silica.

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