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May 2008 <br /> AGE-NC Project No.08-3237 <br /> Page 2 of 7 <br /> AGE will coordinate access control and security onsite.A safe perimeter has been established at 10 <br /> feet around boring/excavation.No unauthorized person should be within this exclusion area. <br /> 4.0. HAZARD EVALUATION <br /> The following substance(s) or hazards are known or suspected to be on site. <br /> SUBSTANCES INVOLVED: CONCENTRATIONS: <br /> Gasoline (TPH-g) UNKNOWN <br /> Benzene UNKNOWN <br /> Toluene UNKNOWN <br /> Ethyl-benzene UNKNOWN <br /> Total xylenes UNKNOWN <br /> Other organic-based products MTBE UNKNOWN <br /> The primary hazards of each are identified as follows: <br /> 1. Hydrocarbon fuels - Components of fuels are colorless liquids with strong aromatic <br /> petroleum hydrocarbon-like odors. They are flammable and have low solubility in water. <br /> Exposure to these materials in excess of recommended exposure limits can cause mild eye, <br /> nose, and throat irritation and can produce a narcotic effect on the central nervous system. <br /> Symptoms of exposure at these concentrations include headache, nausea, drowsiness, <br /> dizziness,and loss of coordination.Certain components of gasoline(BTE&X etc.)are known <br /> or suspected carcinogens. <br /> The following additional hazards are expected on site:Slip-trip-fall hazards,noise,heavy equipment <br /> (i.e., Geoprobe Rig) vibration hazards, traffic hazards, etc. <br /> Advanced GeoEnvironmental,Inc. <br />