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3.17 HEAT STRESS <br /> • During the day-to-day fieldwork, the Project Manager, Site Task Manager, Site <br /> Health and Safety Coordinator, and all workers will be alert for the signs and <br /> symptoms of heat stress. An increased risk of this hazard exists when individuals are <br /> required to work in warm temperatures while wearing protective equipment. <br /> • The Health and Safety Coordinator will monitor the ambient air temperature using a <br /> thermometer located on site in the support zone if applicable. Ambient temperatures <br /> will be checked three times daily i.e. once in the morning and twice in the afternoon. <br /> Monitoring of all of the field crewmembers will be conducted when ambient <br /> temperatures exceed 85° F. <br /> • The field crewmembers working in chemical-resistant protective clothing will be <br /> observed for the following signs and symptoms of heat stress: dizziness and nausea, <br /> profuse sweating, skin color change, vision problems, fainting, weakness, fatigue, <br /> cramping, and hot, red, dry skin. <br /> • Any team member who exhibits these symptoms will be monitored for heat stress. <br /> Heat stress monitoring will consist of measuring heart rate and/or body temperature <br /> (alternative) to prevent the onset of heat stress illness. Field crewmembers will be <br /> encouraged to take breaks each hour, as needed. <br /> • Heart rate (HR) will be measured at the radial pulse of the wrist for thirty seconds as <br /> early as possible in the resting period. The HR at the beginning of the rest period <br /> should not exceed 100 beats per minute. If the HR is in excess of the above <br /> guideline, one-third will shorten the next work period, while the length of the rest <br /> period stays the same. If the pulse rate is in excess of 110 beats per minute at the <br /> beginning of the next rest period, one-third will further shorten the following work <br /> cycle. <br /> • Body temperature (BT) will be measured with a temperature sensitive strip placed on <br /> the worker's forehead as early as possible in the resting period. Strip temperature <br /> should not exceed 99.7° F. If the forehead temperature is less than 99.7° F, the next <br /> work period stays the same. However, if the forehead temperature is in excess of <br /> 99.7° F at the beginning of the next rest period, one-third will further shorten the <br /> following work cycle. Forehead temperature will be measured again at the end of the <br /> 23 <br />