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ti <br /> Heat stress or related illnesses could arise at any time during the <br /> ' course of this project. Wearing protective clothing under confining <br /> conditions, increased energy expense and elevated surrounding <br /> temperatures could cause personnel to experience symptoms of a heat <br /> related disorder. <br /> The contractor shall ensure the TLV established for Heat stress by the <br /> ACGIH is not exceeded for workers who wear permeable clothing (cloth <br /> coveralls) . Work/rest schedules shall be based upon ambient temperature <br /> and direct sunlight intensity. Monitoring of workers who wear <br /> protective clothing (chemically resistant . coveralls) shall be <br /> implemented where ambient temperatures reach or exceed 70 degrees F. <br /> The following procedures shall be used to determine the work/rest <br /> periods: <br /> • Measure heart rate (HR) by the radial pulse for 30 <br /> seconds as early as possible in the rest period. If the <br /> (HR) exceeds 110 beats per minute (BPM) , the next work <br /> period shall be shortened by 1/3, while the rest period <br /> stays the same. If the HR is 110 BPM at the beginning <br /> of the next rest period, the following work cycle shall <br /> be shortened by another 1/3, while the length of <br /> the rest period again remains the same. <br /> • Measure body temperature using a fever strip or oral <br /> thermometer as early as possible in the resting period. <br /> Oral temperature (OT) at the beginning of the rest <br /> period should not exceed 99 degrees F. If it does, the <br /> next work period shall be shortened by 1/3, while the <br /> rest period remains the same. If the OT exceeds 99.7 <br /> degrees F at the beginning of the next work period, the <br /> work period shall be shortened by another 1/3. The OT <br /> shall be measured again at the end of the next rest <br /> period to make sure it has dropped below 99 degrees F. <br /> Workers shall not be allowed to wear semipermeable or <br /> impermeable clothing when his/her OT exceeds 100. 6 <br /> degrees F. <br /> • Body water loss shall be measured if Heat stress has <br /> become a problem. Employees shall be measured on a <br /> scale accurate to +/- 0.25 lb. They shall be measured <br /> in the morning and evening, preferably nude. Body water <br /> loss should not exceed 1.5 percent of total body weight. <br /> Site Safety i Health Plan Rev./1.0 22 <br /> October 20, 1997 <br />