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i <br /> i <br /> r.\pwjem\531,002\h11b&sh <br /> r: <br /> 4.0 HAZARD ASSESSMENT <br /> Soil previously removed from the excavation contained diesel and gasoline. The chemical <br /> hazards likely to be encountered during work on the site are those associated with gasoline <br /> and diesel. The following is a brief description of the potential hazards associated vrith <br /> diesel and gasoline. <br /> 4.1 Diesel <br /> Fuel for diesel engines is obtained from distillation of petroleum. It consists of a complex <br /> mixture of mostly unbranched paraffins (C9-t22). Diesel fuel is a combustible liquid with <br /> a flash point of 110-190 which should be considered to be a moderate fire hazard. While <br /> the inhalation toxicity of diesel oil is considerably lower than gasoline,the gasoline exposure <br /> limit(ILV)Will be used to control exposure to airborne diesel vapors in the absence of an <br /> �. occupation standard for diesel vapor exposure. The airborne standard(TLV) for gasoline <br /> is 300 PPM. <br /> Under conditions whereposure may occur, mild eye, nose and throat irritation, <br /> headaches,Inausea,drowsiness and dizziness may possibly occur. In open areas,ventilation <br /> is usually adequate to prevent prolonged breathing of high diesel vapor concentrations. <br /> Diesel fuel is a combustible liquid with a flash point as low as.110°F. Caution must be <br /> itaken to keep sources of ignition from coming into contact with gasoline vapors. A— foot <br /> NO 5MOKINGUM—Mst be maintain d d 'nz-a n;eratiosis. <br /> t <br /> 3 <br /> 1 <br /> 4 <br /> k <br /> z <br /> tt -, <br />