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s r.- - If oral temperature exceeds 99.6oF (371.&0, shorten the next work cvcie nv one-third without changing the rest period. If oral temperature still exceeds 99.6,aF (;;7.&O at the beginninz of the next rest period. shorten the following cycie by one-third. Do nZ permit a worker to wear a semipermeable or impermeable garment when oral temperature exceeds 100.60F (:$.1°C). Prevention of Heat Stress - Proper training and preventative treasures wiil aid in �. averting loss of worker productivity and serious illness. Heat stress prevention is particularly important because once a person suffers from heat stroke or heat exhaustion, that person may be predisposed to additional heat related illness. To �-- avoid heat stress the following steps should be taken: • Adjust work schedules. I., - Modify work:/rest schedules according to monitoring requirements. - Mandate wort: slowdowns as needed. Perform work during cooler hours of the day if possible or at night if adequate lighting can be provided. • Provide shelter (air-conditioned. if possible) or shaded areas to protect *" personnel during rest periods. • Maintain worker's body fluids at normal levels. This is necessary to ensure that the cardiovascular system functions adequately. Daily fluid intake must approximately equal the amount of water lost in sweat, i.d., eight fluid ounces « (0.73 liters) of water must be ingested for approximately every eight ounces (0.23 kg) of weight lost. The normal thirst mechanism is not sensitive enough to ensure that enough water will be drunk to replace lost sweat. When heavy sweating occurs. encourage the worker to drink more. The followinF. strategies may be useful: Maintain water temperature 50° to oOoF (10a to 16.6°C). Provide small disposal cups that hold about four ounces (0.1 liter). Have workers drink 10 ounces (0.5 liters) of fluid (preferably water or dilute drinks) before beginning work. - Urge workers to drink a cup or two every 15 to 20 minutes. or at each monitoring break. A total of 1 to 1.6 gailons �4 to 6 liters) of fluid per day are recommended. but more may be necessary to maintain body weight. • Train workers to recoenize the symptoms of heat related illness. 2.2J Cold-Related Illness If work: on this project begins in the winter months, thermal injury clue to cold exposure can become u problem for field personnei. Svstemic cold exposure is referred to as hypothermia. Local cold exposure s generally labeled frostbite. �slsYi��.otr000z 2-4