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24 July 2002 <br /> AGE-NC Project No. 02-0948 <br /> Page 2 of 7 <br /> 3.0. ON-SITE CONTROL <br /> The Site Safety Officer will coordinate site access control and security. A exclusion zone will be <br /> established approximately 10 feet around boring location work areas. No unauthorized person shall <br /> be allowed 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 /> Benzene Unknown <br /> Toluene Unknown <br /> Ethyl-benzene Unknown <br /> Total xylenes Unknown <br /> MTBE Unknown <br /> Gasoline Unknown <br /> Diesel Unknown <br /> The primary hazards of each are identified as follows: <br /> 1. Hydrocarbon fuels-Components of fuels are colorless liquids with strong aromatic petroleum <br /> hydrocarbon-like odors. They are flammable and have low solubility in water. Exposure to <br /> these materials in excess of recommended exposure limits can cause mild eye, nose, and <br /> throat irritation and can produce a narcotic effect on the central nervous system. Symptoms <br /> of exposure at these concentrations include headache,nausea,drowsiness,dizziness,and loss <br /> of coordination. Certain components of gasoline (BTEX etc.) are known or suspected <br /> carcinogens. <br /> The additional potential hazards include: Slip-trip-fall hazards, noise, heavy equipment (i.e., <br /> excavator/backhoe), vibration hazards, traffic hazards, etc. <br /> Advanced GeoEnvironmental,Inc. <br />