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Ir CDIM Corporate Safety Program U0 W-9107 HSP-10. Heat and Cold Stress Management ENGINEERING Rev. 0 5/21/2020 Table 5-2. Heart Rate Recovery Criteria Heart rate recovery pattern P3 Difference between P1 and P3 Satisfactory recovery <90 -- High recovery (Conditions may require further 90 10 study) No recovery (May indicate too much stress) 90 <10 If a worker's oral temperature (taken for three minutes under the tongue) exceeds 99.6 degrees F at the end of a work period, then additional break time will be employed and the next work cycle will be shortened by one-third. The worker will not be allowed to wear a semi-permeable or impermeable garment if his/her oral temperature exceeds 100.6 degrees F. Oral temperature can be checked with a clinical thermometer after work but before the employee drinks water. 4.1.6 Symptoms of Heat Stress Symptoms of heat stress are provided in Table 5-3, below. Persons showing signs of heat cramps and heat exhaustion will discontinue work, be provided cool water to drink, and will be taken to the nearest medical facility to prevent the on-set of heat stroke. For persons showing signs of heat stroke medical care must be provided immediately. Call 911 and while waiting for assistance provide cool water to drink if the person is conscious and capable of safely drinking it. Everything possible will be done to reduce a heat stroke victim's body temperature by moving them to a cool and shaded area, removing clothing; fanning the person with cool air, rinsing them with cool water; and placing cold packs on the person's wrists, ankles, groin, neck, and armpits until help arrives. This is a medical emergency; medical assistance must be obtained immediately. Table 5-3. Signs and Symptoms of Heat Stress Heat rash may result from continuous exposure to heat or humid air. Heat cramps are caused by heavy sweating with inadequate electrolyte replacement. Signs and symptoms include: • muscle spasms • pain in hands, feet, and abdomen Heat exhaustion occurs from increased stress on various body organs including inadequate blood circulation due to cardiovascular insufficiency or dehydration. Signs and symptoms include: • Pale, cool, moist skin • heavy sweating • dizziness • nausea • fainting Heat stroke is the most serious form of heat stress. Temperature regulation fails and the body temperature rises to critical levels. Immediate action must be taken to cool the body before serious Page 6 of 9