1. Some of the initial testing showed levels below MSHA's permissible exposure limit . 2. Airborne occupational exposure limits for asbestos are based on using the PCM method. 3. However that level of exposure is already above current established safety exposure limits . 4. These would provide a sound scientific data base for establishing recommended exposure limits . 5. Heavy wave exposure limits coral diversity and cover on Velasco Reef. 6. In many European countries these exposure limits may also be a legal requirement. 7. The concentrations measured can be compared with the appropriate exposure limits . 8. Government agencies in the United States have set occupational exposure limits for PCl 3. 9. The agency has issued non-binding, alternate occupational exposure limits that may better protect workers. 10. The short term exposure limit for airborne benzene is 5 ppm for 15 minutes.
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