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- age in years)] At 1 minute into the rest period the recovery HR will be determined <br /> The recovery HR should not exceed 110 beats per minute <br /> 3 It the initial HR exceeds the age-adjusted maximum HR, or the 1-minute recovery HR <br /> is greater than 110 beats per minute, then the next work period will be decreased by 10 <br /> minutes <br /> Heat stress due to water loss can be prevented To prevent dehydration. water intake must <br /> approximate sweat loss Water intake guidelines are as follows <br /> 1 The sense of thirst is not an adequate regulator of water replacement needs during heat <br /> exposure Therefore, water must be replaced at prescribed intervals <br /> a Before work begins, drink two 8-ounce glasses of water <br /> b During each rest period, drink at least two 8-ounce glasses of water <br /> 2 Plain water, scrved cool, is excellent An adequate supply of potable water and drinking <br /> cups will be readily available, such as in a support vehicle, to provide water during rest <br /> periods <br /> 3 Adding salt to water is not recommended However, other fluids, in addition to water, <br /> could include dilute fruit juices and electrolyte replacement drinks diluted 3 1 with <br /> water Do not use salt tablets' <br /> An initial work/rest cycle of 1 hour work and 15 minutes rest is recommended for protection <br /> of staff when the heat stress hazard is high The recommended cycle will be adjusted up or <br /> down based upon worker monitoring, environmental conditions, and the judgement of the SSO <br /> At any time, field team members recognize the signs or symptoms of heat stress prior to a <br /> scheduled rest period, they will notify the SSO immediately in order that a rest period can be <br /> called <br /> Heat stress, if not prevented, results in heat stress illnesses Two critical illnesses, if not <br /> recognized and treated immediately, can become life-threatening These are heat exhaustion and <br /> heat stroke Heat exhaustion will result if the prevention measures described above are not <br /> implemented Ignoring the signs and symptoms of heat exhaustion will lead to the development <br /> of heat stroke <br /> Heat stroke is an immediate, life-threatening condition that results because the body's heat <br /> regulating mechanisms shut down, and the body cannot cool itself sufficiently As heat is <br /> excessively stored in the body, brain damage can result causing permanent disability or death <br /> • <br />