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2-01-8 <br />AE—NC Pro-je-a- No-. 04-1-23 q <br />Pa-e,2 of- 7 <br />3M. ON-SITE CONTROL <br />The Site Safety Officer will coordinate site access control and security. An exclusion zone will be <br />established approximately 10 feet around active work 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 />TPH-g up to 5,000 mg/kg <br />Benzene up to 17,000 ug/I <br />Toluene up to 42,000 ug/I <br />Ethylbenzene up to 6,000 ug/I <br />Xylenes up to 32,000 ug/I <br />1,2-DCA up to 250 ug/I <br />TAME up to 80 ug/I <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 <br />eye, nose, and throat irritation and can produce a narcotic effect on the central nervous <br />system. Symptoms of exposure at these concentrations include headache, nausea, <br />drowsiness, dizziness, and loss of coordination. Certain components of gasoline (BTEX <br />etc.) are known or suspected carcinogens. <br />The additional potential hazards include: Slip-trip-fall hazards, noise, heavy equipment (i.e., back <br />hoe), vibration hazards, traffic hazards, etc. <br />Advanced GeoEnvironmental, Inc.