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o Wear cooling devices such as vortex tubes or cooling <br /> vests beneath protective garments. <br /> o Take all breaks in a cool rest area (77°F is best) . <br /> o Remove impermeable protective garments during rest <br /> periods. <br /> o Do not assign other tasks to personnel during rest <br /> periods. <br /> o Inform personnel of the importance of adequate rest, <br /> acclimation, and proper diet in the prevention of heat <br /> stress. <br /> 102 . 6 MONITORING <br /> 102 . 6. 1 TEMPERATURE <br /> C <br /> The heat stress of an area can be monitored by the Wet <br /> Bulb Globe Temperature Index (WBGT) technique. Where heat stress <br /> is a possibility, a heat stress monitoring device, such as the <br /> Wibget Heat Stress Monitor (Reuter Stokes) can be utilized. <br /> The WBGT shall be compared to the Threshold Limit Values <br /> (TLV) outlined by the ACGIH TLV guides, and a work-rest regiment <br /> can be established in accordance with the WBGT. Note that 5 <br /> degrees C must be subtracted from the TLVs for heat stress listed <br /> to compensate for the wearing of impermeable protective clothing. <br /> D797 . 8/72 HS-102-4 November 1990 . <br />