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Heat stress or related illnesses could arise at any time during the course of this project. Wearing protective clothing under confining conditions, increased energy expense and elevated surrounding temperatures could cause personnel to experience symptoms of a heat related disorder. Advanced GeoEnvironmental shall ensure the TLV established for Heat stress by the ACGIH is not exceeded for workers who wear permeable clothing (cloth coveralls). Work/rest schedules shall be based upon ambient temperature and direct sunlight intensity. Monitoring of workers who wear protective clothing(chemically resistant coveralls) shall be implemented where ambient temperatures reach or exceed 70 degrees F. The following procedures shall be used to determine the worktrest periods: • Measure heart rate (HR)by the radial pulse for 30 seconds as early as possible in the rest period. If the (HR) exceeds 110 beats per minute (BPM), the next work period shall be shortened by 1/3, while the rest period stays the same. If the HR is 110 BPM at the beginning of the next rest period, the following work cycle shall be shortened by another 1/3,while the length of the rest period again remains the same. Measure body temperature using a fever strip or oral thermometer as early as possible in the resting period. Oral temperature (OT) at the beginning of the rest period should not exceed 99 degrees F. If it does, the next work period shall be shortened by 1/3, while the rest period remains the same. If the OT exceeds 99.7 degrees F at the beginning of the next work period, the work period shall be shortened by another 1/3. The OT shall be measured again at the end of the next rest period to make sure it has dropped below 99 degrees F. • Workers shall not be allowed to wear semi-permeable or impermeable clothing when his/her OT exceeds 100.6 degrees F. • Body water loss shall be measured if Heat stress has become a problem Employees shall be measured on a scale accurate to +/- 0.25 lb. They shall be measured in the morning and evening, preferably nude. Body water loss should not exceed 1.5 percent of total body weight. Suggested Frequency of Physiological Monitoring for Fit and Acclimatized Workers Adjusted Normal Work Impermeable Temperatures Ensemble Ensemble 90 deg F After each 45 min After each 15 min or> of work of work 87.5-90 After each 60 min After each 30 min deg F of work of work 82.5-87.5 After each 90 min After each 60 min deg F of work of work 77.5-82.5 After each 120 min After each 90 min deg F of work of work 72.5-77.5 After each 150 min After each 120 min deg F of work of work *Adjusted Temperature--taF + (13 x%Sunshine) where (ta) is the ambient temperature measured with a glass thermometer. %Sunshine is measured by estimation of total available sunshine(100% sunshine=0% cloud cover and 0a/a sunshine= 100% cloud cover). 5.5.4 Prevention of Sunburn When working in the sun, regardless of temperature, exposed skin is vulnerable to sunburn. Protect exposed skin with an appropriate sunscreen. A sun-screen with a sun protection factor(SPF) of 15 or greater is recommended for a full day in the sun. Page 21