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L <br /> 15 January 1999 <br /> AGE-NC Project No. 98-0540 <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 a <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 /> Aviation Fuel (Avgas) 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 additional potential hazards include: Slip-trip-fall hazards. noise—heayy equipment i.e. <br /> Geoprobe rig), vibration hazards, traffic hazards. etc. <br /> 5.0. PERSONAL PROTECTIVE EQUIPMENT <br /># Based on evaluation of potential hazards, the following levels of personal protection have been <br /> Advanced GeoEnviron menta1,Inc. <br /> f <br />