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Health and Safety Plan Page 6 3.4 Acoustical Hazards In order to prevent hearing impairment, the use of ear plugs or ear muffs shall be required for all personnel when heavy equipment is in use at the site. However, should any personnel develop pain in the ear due to work- site noise, they shall immediately don a set of ear plugs or muffs. Noise levels will also be controlled to conform to local noise ordinances. 3.5 Biological Hazards In order to reduce the risk of biological contamination, Personal Protective Equipment, described in Section 5.0, shall be worn for each specific task. This protective equipment shall be removed, and hands and face washed prior to contact with the mouth, by the hands, for such purposes as eating, drinking, or smoking. Smoking shall only be permitted in those areas designated by SSHO. 3.6 Heat Stress All personnel entering the work area should be familiar with the signs and symptoms of heat stress. These include: * Heat Exhaustion --Dizziness, light-headedness, slurred speech, rapid pulse, confusion, fainting, fatigue, copious perspiration, cool skin that is sometimes pale and clammy, and nausea. * Heat Stress --Hot, dry, flushed skin; delirium, and comma (in some cases). Heat Stress can be prevented by resting frequently in a shaded area and consuming large quantities of fresh, potable water. If heat exhaustion symptoms are observed, the person will be required to rest in a shaded area and consume liquids. If symptoms are widespread and observed frequently, an appropriate work/rest regimen will be instituted. This may involve limiting the work period so that after one minute of rest, a person's heart rate (HR) does not exceed 110 beats per minute. If the HR is higher than 110 beats per minute, the next work period should be shortened by 33 percent, while the length of the rest period stays the same. If the HR is 110 beats per minute at the beginning of the next rest period, the following work cycle should be shortened by 33 percent. Resting HR should be determined prior to start of on site activities. a healthy individual's resting HR is usually 60 to 72 beats per minute. If symptoms of heat stress are observed, the victim will be transported to the nearest hospital immediately. Workers should not hesitate to seek medical attention if heat stress is suspected.