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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 />rest period to assure that it has decreased to below 99.7° F. Under no circumstances <br />will a worker be allowed to wear impermeable or semi -permeable garments if his/her <br />27 <br />