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12 May 1998 <br /> AGE-NC Project No. 98-0451 <br /> Page 2 of 7 <br /> 3.0. ON-SITE CONTROL <br /> Kevin McKibben 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 30ppm <br /> Motor oil / Waste oil 2,700 ppm <br /> Benzene, toluene, xylenes 5 ppm, 0.005 ppm, 8 ppm <br /> Other organic-based products (?) 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: &ical work related to facility. Noise. falling <br /> rods, flying hammer, snapped.cables, etc. on the Geoprobe/drill rig (if applicable). <br /> Advanced GeciEnvironmental,Inc. <br />