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A=COM 4.4.4 Given the work demands(light, moderate, heavy or very heavy), heat of the work environment, and such aspects as PPE in use, workload will be adjusted appropriately to allow for proper acclimation. • This is the process by which the body"gets used to" hot work environments.This is achieved by slowly increasing workloads. • New and returning Employees(absent one week or more)who have not had time to acclimatize may be more susceptible to heat related illnesses, even in seemingly low risk heat exposures. • All Employees shall be allowed time to acclimatize in the event of a heat wave.All Employees assigned to a new process with additional heat exposures shall be allowed to acclimatize. • Minimize workload and gradually increase as tolerance is built up.Allow for more frequent breaks. • While acclimatization normally takes approximately 5 to 7 days, heightened monitoring of these Employees will be maintained for the first 14 days. 4.4.5 Employees shall be instructed in the recognition of heat stress symptoms, the first aid treatment procedures for severe heat stress, and the prevention of heat stress injuries. Employees shall be encouraged to immediately report any heat stress that they may experience or observe in fellow Employees. Supervisors shall use such information to adjust the work-rest schedule to accommodate such problems. 4.4.6 Wherever possible, a designated break area should be established in an air-conditioned space, or in shaded areas where air conditioning is impractical.The break area should be equipped to allow Employees to loosen or remove protective clothing, and sufficient seating should be available for all Employees. During breaks, Employees shall be encouraged to drink plenty of water or other liquids, even if not thirsty, to replace lost fluids and to help cool off. Cool water should be available at all times in the break area, and in the work area itself unless hygiene/chemical exposure issues prevent it. 4.5 Symptoms and Treatment 4.5.1 Refer to S3AM-113-ATT2 Heat Stress—Symptoms& Treatment. 4.5.2 Employees who exhibit ANY signs of significant heat stress (e.g., profuse sweating, confusion and irritability, pale, clammy skin)shall be relieved of all duties at once, made to rest in a cool location, and provided with large amounts of cool water. 4.5.3 Severe heat stress(heat stroke)is a life-threatening condition requiring immediate emergency medical care (e.g., call 911). Anyone exhibiting symptoms of heat stroke(slurred speech, unconsciousness, etc.)shall be taken immediately to the nearest medical facility. Steps shall be taken to cool the person during transportation (clothing removal,wet the skin, air conditioning, etc.). 4.6 Prevention 4.6.1 Requirements for working in extreme heat may be triggered by regulatory established criteria (e.g. CAL/OSHA requires high heat procedures when temperature equals or exceeds 95°F)or as a result of a hazard analysis assessing various contributory factors(refer to S3AM-113-ATT1 Heat Stress— Temperature Thresholds). Employees working in extreme heat or sun should understand and apply the following guidelines for preventing and detecting heat exhaustion and heat stroke. • When possible, begin hydrating at least three days prior to working in high heat conditions. • Review the heat stress exposure control plan within the SH&E Plan, and/or Task Hazard Analysis. • If the supervisor is not immediately available confirm a reliable method of communication is in place to allow for contact with supervision. In the absence of cellular reception, a satellite phone or similar device may be required. Heat Stress(S3AM-113-PR1) Revision 3 September 30,2020 PRINTED COPIES ARE UNCONTROLLED.CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET. 6 of 10