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nnovative <br /> onstruction <br /> olutions <br /> 20% exposure on day 1 and an increase of no more than 20 % on each additional day . Workers <br /> who have had previous experience with the job , the acclimatization regimen should be no more <br /> than a 50% exposure on day 1, 60 % on day 2, 80% on day 3 , and 100% on day 4 . In addition , the <br /> level of acclimatization each worker reaches is relative to the initial level of physical fitness and <br /> the total heat stress experienced by the individual and appears to be better maintained by those <br /> who are physically fit . Workers can maintain their acclimatization even if they are away from the <br /> job for a few days, such as when they go home for the weekend . However, if they are absent for <br /> a week or more then there may be a significant loss in the beneficial adaptations leading to an <br /> increased likelihood of heat- related illness and a need to gradually reacclimate to the hot <br /> environment . Acclimatization can often be regained in 2 to 3 days upon returning to a hot job . <br /> ft <br /> • � ' • . • • - After each 45 minutes of After each 15 minutes of <br /> work work <br /> • � ' After each 60 minutes of After each 30 minutes of <br /> work work <br /> After each 90 minutes of After each 60 minutes of <br /> work work <br /> After each 120 minutes of After each 90 minutes of <br /> work work <br /> After each 150 minutes of After each 120 minutes of <br /> work work <br /> Adapted from : NIOSH /OSHA/ USCG / EPA Occupational Safety and Health Guidance Manual for <br /> Hazardous Waste Site Activities, Chapter 8 ( 1985 ) . <br /> 21 <br />