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• A work regime that will provide adequate rest periods for cooling down will be <br />established. <br />• Cooling devices such as vortex tubes or cooling vests can be worn beneath <br />protective garments. <br />• All breaks will be taken in a cool rest area (770 is best). A shaded area will be <br />provided. <br />• Employees will remove PPE during rest periods. Employees will not be <br />assigned other tasks during rest periods. <br />• All employees will be informed of the importance of adequate rest, reduced <br />alcohol intake, and proper diet in the prevention of heat stress. <br />• Heat stress monitoring protocol as stated in Section 3.13.6 will be adhered to in <br />the event that environmental temperatures warrent monitoring. <br />3.13.6 Signs and Symptoms of Heat Stress and Heat Stroke <br />Heat stress effects range from transient heat fatigue to serious illness and death. Heat stress <br />is caused by several interacting factors, including environmental conditions, clothing, work <br />load, and the individual characteristics of the worker. Because heat stress is the most <br />common and potential serious illness at a work site, preventive measures and alertness to the <br />signs and symptoms are vital. Heat stress monitoring in accordance with the American <br />Conference of Governmental Industrial Hygienist (ACGIH) threshold limit values for heat <br />stress should begin when personnel are wearing PPE, including Tyvek coveralls, and the <br />ambient temperature exceeds 700F. If impermeable garments are worn, all personnel will <br />follow the guidelines of ITC Procedure 9533.1 Working in Hot Environments. One or more <br />of the following may be indicative of heat stress: <br />• Heat rash caused by continual exposure to heat and humid air, and aggravated by <br />chafing clothes. Heat rash decreases a person's ability to tolerate heat as well as <br />becoming an irritating nuisance. <br />• Heat cramps caused by heavy sweating. Sign and symptoms includes: muscle <br />spasms, and pain in the feet, hands and abdomen <br />MZ/07-07-9Z(EEs/ENG/2054r 3-21 <br />