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r) <br /> FKee platforms, walkways and scaffolding fr e of obstructions Keep p form > y g cans and excess grease or <br /> oil that could cause a surface to become slick and dangerous. <br /> Store gasoline only in approved flammable storage containers with spark arresters. <br /> ers. <br /> Check drill rig equipment prior to starting work; repair or replace faulty items. <br /> Handle augers with care. Use proper lifting technique; use a tool hoist for larger <br /> augers whenever possible. Stay clear of rotating augers. <br /> 7 Level and stabilize the drill rig prior to raising the mast. <br /> Watch for slippery ground and rig surfaces hen mounting or dismounting the <br /> Fplatform. <br /> FUnattended boreholes must be adequately coN ered or protected. <br /> Avoid drilling during electrical storms. <br /> FHeat Stress Recognition and Control <br /> Heat stress is likely to be a significant hazard when a bient temperatures exceed 85°F. Evidence <br /> for heat stress includes flush skin, rash, irritability, f 'ntness, and dry, cool skin. Wearing Personal <br /> Protective Equipment (PPE) can place a hazardous w iste worker at considerable risk of developing <br /> heat stress. This can result in health effects ranging f-om transient heat fatigue to serious illness or <br /> death. Heat stress is caused by a number of interactir g factors, including environmental conditions, <br /> clothing, work load, and the individual characteristic of the worker. Because heat stress is one of <br /> the most common (and potentially serious) illnesses t hazardous waste sites, rest periods, adequate <br /> drinking water intake, and regular monitoring for sigtis and symptoms of distress are vital. <br /> FHeat-stress monitoring should commence if personn 1 are wearing PPE (including Tyvek-type <br /> coveralls) and the ambient temperature exceeds 70° .; if impermeable garments are not worn, <br /> monitoring should commence at 85° F. Heat-stress monitoring should be conducted by monitoring <br /> Fthe heart rate as early as possible in the rest period. The heart rate should not exceed I 10 beats per <br /> minute at the beginning of the rest period, and should decrease 10 beats per minute during each of <br /> the following three minutes. If the heart rate exceeds this amount, shorten the next work cycle by <br /> one third and keep the rest period the same. Suggestc d monitoring frequencies are shown in the <br /> following table. <br /> t ' <br /> A-8 <br />