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| Appendix A: |
APPENDIX A: Heat Exposures Tables | Heat exposure tables |
APPENDIX A: Heat Exposures Tables
ACGIH
Screening Criteria for Heat Stress Exposure. WBGT values in °C.
NOTE: according to the ACGIH’s guidelines, the temperature values represent a work and rest process which is explained in the standards.
Please refer to the ACGIH TLV’s and BEIs for specific details.
| Work and |
| Light | Moderate | Heavy |
| Very |
|
|
|
|
| |||||
| recovery |
|
|
|
|
| Heavy |
|
| (TLV ) |
|
|
|
|
|
|
|
75% to 100% |
| 31.0 | 28.0 | 26.0* | 23.5* |
| ||
50% to 75% |
| 31.0 | 29.0 | 27.5 | 25.5* |
| ||
25% to 50% |
| 32.0 | 30.0 | 29.0 | 28.0 |
| ||
0% to 25% |
| 32.5 | 31.5 | 30.5 | 30.0 |
| ||
Work and |
| Light |
| Moderate |
| Heavy |
| Very |
recovery |
|
|
|
|
|
|
| Heavy |
(Action Limit) |
|
|
|
|
|
|
|
|
75% to 100% | 28.0 | 25.0 | 22.5* | 20.0* | ||||
50% to 75% | 28.5 | 26.0 | 24.0 | 22.5* | ||||
25% to 50% | 29.5 | 27.0 | 25.5 | 24.5 | ||||
0% to 25% | 30.0 | 29.0 | 28.0 | 27.0 | ||||
*Values not specified by ACGIH have been estimated for continuity.
Cited from "American Conference of Governmental Industrial Hygienists - Threshold Limit Values and Biological Exposure Indices for 2008"; Reprinted with permission from ACGIH
United States Navy
Physiological Heat Exposure Limits (PHEL) Time Table (Without the presence of fuel combustion gases/fuel vapors) is displayed on the following page.
The recommended working hours are shown based on a maximum of eight hours. Naval personnel will follow a category, I - VI, based upon their function.
