| 66. | The general approach necessary to control occupational exposure to dusts is as follows: not all dusts have been assigned OELs, but the lack of such limits should not imply an absence of hazard. In the absence of a specific exposure limit for a particular dust, exposure should be adequately controlled. Where there is no indication of the need for a lower value, personal exposure should be kept below both 10 mg/m³, eight-hour timeweighted average, total airborne dust and 5 mg/m³, eight-hour time-weighted, average respirable dust. Such, or greater, dust concentrations should be taken as excessive concentrations. |
