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*MW <br /> 28 March 2000 <br /> AGE-NC Project No. 99-0655 <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 excavation(s) areas. No unauthorized person shall be <br /> 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 65 ppb <br /> Toluene 5,570 ppb <br /> Ethyl-benzene 2.930 ppb <br /> Total xylenes 26,720 ppb <br /> Gasoline (TPH-gasoline) 3.670 ppm <br /> Other organic-based products (e.g..fuel oxygenates) 1 6,740 ppb <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, heavy 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 /> designated for the applicable work areas or task: <br /> Adranced GeoEnvironmental.Inc. <br />