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21 September 1998 <br /> AGE-NC Project No 97-0290 <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 /> Gasoline 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 of a hegYY a ui ment I e <br /> 0e rp obe ng). 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 GeoEnvironmentai,Inc <br />