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SECTION:4 <br /> HAZARD EVALUATION <br /> The potential hazards to personnel working at this site have been identifted4s chemical and <br /> `to the potential for exposure is described below. <br /> physical. Each potential hazard relative <br /> 4.1 Chemical Contamination <br /> Table 4-1 presents general information on the potential chemicals of concern at the site. The <br /> information includes exposure limits and recommendations, routes of exposure, typical signs <br /> and symptoms of exposure and ionization potentials. The personnel protection measures for <br /> specific field activities at the site will be based on direct instrument readings which will <br /> screen for petroleum hydrocarbons and aromatic hydrocarbons. <br /> 4.2 ' Physical Hazards <br /> . 4.2.1 General <br /> Physical hazards associated with this;are considered to be minor. All hand operated <br /> sampling tools (hand auger and slam'bar) will be operated in a safe manner. <br /> No subsurface work is proposed in any areas containing subsurface utilities. <br /> Personnel will be aware of the movement of heavy equipment onsite at all times. <br /> 4.2.2 Sunburn . <br /> Working outdoors on sunny days,for extended periods of time can cause sunburn to <br /> the skin. Excessive exposure to`sunlight is associated with the development of skin <br /> cancer. Field staff should take pecautions to prevent sunburn by using sun-screen <br /> lotion SPF at least 15 and/or wearing hats and long-sleeved garments. <br /> E <br /> 4.2.3 Heat Stress <br /> The potential for heat stress is a concern when field activities are performed on <br /> warm, sunny days, and is accentuated when personal protective equipment is worn.. <br /> Heat stress prevention measures and monitoring will be implemented if site <br /> r Fahrenheit. <br /> temperatures are above 70 degrees <br /> Precautions to prevent heat stress will include work/rest cycles so that rest periods are <br /> taken before excessive fatigue occurs, and-regular intake of water to replace what is- <br /> lost from sweating. Work/rest cycles will be established based on monitoring the <br /> heart rate (pulse) of each individual worker. Rest breaks will be long enough to <br /> reduce the heart rate (HR) below.levels calculated:according to the following method. <br /> 1. The worker will initially determine their resting HR prior to starting <br /> work activities. <br /> 44 <br />