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PES Environmental, Inc. <br /> • Buried utility lines and energized overhead and underground power lines; <br /> • Heat stress and cold stress; <br /> • Lifting heaving objects; <br /> • Sunburn; and <br /> • Biological hazards. <br /> These hazards are described below. <br /> 4.3 Noise <br /> Noise exposures will be controlled to levels below the permissible noise exposure levels, <br /> which are equivalent to an 8-hour time weighted average (TWA) level of 85 decibels (dBA). <br /> Reduction of exposures may be by engineering controls or adequate hearing protection. <br /> Engineering controls will include isolation of the noise source by their enclosure and <br /> reduction of noise transmission by application of noise absorbing materials. <br /> Most work site noise will originate from sampling and/or heavy equipment. As a result, <br /> equipment operators and observers will be required to use hearing protection when exposed <br /> at or above 85 decibels. Use of portable "Walkman-type" radios is prohibited for use as a <br /> hearing protection device. A copy of the OSHA Occupational Noise Standard, 29 CFR <br /> 1910.95 will be available, and copies will be made available to employees upon request. <br /> 4.4 Heat Stress <br /> A worker's risk for developing heat stress is greatly increased when wearing impermeable <br /> clothing or respirators. This type of clothing interferes with the body's normal cooling <br /> mechanisms by preventing the evaporation of perspiration. For workers who wear <br /> permeable clothing, work/rest schedules recommended in the current ACGIH Threshold <br /> Limit Values (TLV) for Heat Stress will be followed. For workers who wear semi-permeable <br /> or impermeable clothing, technical guidelines in "Occupational Safety and Health Guidance <br /> Manual for Hazardous Waste Site Activities" will be followed. Monitoring of personnel <br /> wearing impermeable clothing will commence when the ambient temperature is above <br /> 70 degrees Fahrenheit. Monitoring frequency will increase as the ambient temperature <br /> increases or as slow recovery rates are observed. A shady rest area and an adequate supply <br /> of cool drinking water will be provided for the workers. <br /> 4.5 Cold Stress <br /> Cold stress may be an exposure hazard during the project based on the current work schedule <br /> and anticipated weather conditions. Exposure to cold weather can lead to frost bite and/or <br /> hypothermia. The signs and symptoms of excessive exposure to cold are listed below: <br /> 148400101H002.doc 5 <br />