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Project No 58080-06-01 <br /> July 7, 1994 <br /> target organs for human exposure to the above-noted compounds are summarized in Table <br /> II <br /> Physical and Operational Safety Hazards <br /> Potential physical hazards associated with the proposed field activities include excavation <br /> instability, explosion and fire, electrical shock and noise exposure hazards <br /> - Explosions and fires often arise spontaneously However, they more commonly <br /> result from site activities where an ignition source (such as a spark from <br /> equipment) is introduced to an explosive or flammable environment (e g , volatile <br /> organic vapors) The potential presence of volatile organic vapors at the project <br /> site requires special monitoring considerations as are outlined in the "Monitoring <br /> Program" section of this Plan <br /> - Electrical hazards include overhead power lines and buried cables which pose a <br /> danger of shock or electrocution if workers contact or sever them during site <br /> operations A utility locating service should be retained prior to any excavation <br /> activity <br /> - Noise hazards can be created by equipment that generates excessive noise <br /> Excessive noise can result in physical damage to the ear Onsite personnel are <br /> advised to wear hearing protection devices during the operation of heavy <br /> equipment onsite <br /> - Operational safety hazards may include being hit by equipment and falling <br /> objects, falling in holes or ditches or on slippery surfaces, being buried by <br /> collapsing excavations, and the use of personal protective equipment which can <br /> impair a workers agility, hearing and/or vision Personnel are prohibited from <br /> entering the excavation where it is deeper than 5 feet In addition, caution shall <br /> be exercised when gpproachmg the excavation to limit the potential for calla se <br /> of the sidewalls and of persons falling into the excavation <br /> i <br /> Heat Stress <br /> In addition to chemical, physical and operational hazards referenced above, heat stress <br /> may present a potential hazard to onsite personnel during the onsite operations Hazards <br /> can be created when individuals work in warm temperatures while wearing relatively <br /> impervious protective clothing When ambient air temperatures at the site exceed <br /> Or Page 8 <br />