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04 January 2013 AGE -NC Project No. 12-2179 Page 8 of 16 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 , 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 . 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 Ib. 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 em era uresNormal or nsem e m ermea a nsem e 90 deg For > After each 45 min of work After each 15 min of work 87.5 — 90 deg F After each 60 min of work After each 30 min of work 82.5 — 87.5 deg F After each 90 min of work After each 60 min of work 77.5 — 82.5 deg F After each 120 min of work After each 90 min of work 72.5 — 77.5 deg F After each 150 min of work After each 120 min 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 0% sunshine = 100% cloud cover). Prevention of Sunburn When working in the sun, regardless of temperature, exposed skin is vulnerable to sunburn. Protect exposed skin with an appropriate sun screen. A sun screen with a sun protection factor (SPF) of 15 or greater is recommended for a full day in the sun. The harmful effects that chemical substances may have on the human body often necessitate the use of protective clothing. Proper selection of personal protective equipment (PPE) depends upon a number of factors. Protection against different types of chemicals and differing concentrations of those substances can be quite varied. The tasks to be performed and the probability of exposure to the substance must also be considered when specifying protective clothing. Advanced GeoEnvironmental, Inc.