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19 November 1999 <br /> . AGE-NC Project No 99-0657 <br /> Page 2 of 7 <br /> Brian Millman has been designated to coordinate access control and security onsite A safe <br />' perimeter has been established at 10 feet around boring/excavation. No unauthorized person <br /> 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 260 mg/Kg <br />' Diesel 48 mg/Kg <br /> BTEX 17 mg/Kg <br /> tMTBE 46 mg/Kg <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 ical work related to Lacilijy Noise fallen <br />' rods flying hammer, snapped cables etc on the backhoe/excavator (if applicable) <br /> ' Advanced GeoEmaronmental,Inc <br />