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• • Project No. 014-95262 <br /> Page No. 9 <br /> 3.4 Potential Noise Hazards <br /> Exposure to excessive noise will be controlled by issuance and use of hearing protection as <br /> instructed by the Task Leader or Safety Officer. Noise levels will be periodically monitored by the Safety <br /> Officer. <br /> 4.0 CHEMICAL HAZARD EVALUATION <br /> Suspect hazardous materials: <br /> • petroleum hydrocarbons <br /> • volatile organic compounds <br /> • PCBs <br /> • ammonia <br /> • chloride salts <br /> • various minerals <br /> ' Petroleum Hydrocarbons <br /> Petroleum hydrocarbons possess a flammability risk when exposed to heat or flame. The <br /> components of concern are benzene, toluene, ethylbenzene, and xylene. <br /> Benzene is considered a human carcinogen, human poison by inhalation and an experimental poison <br /> ' by skin contact. Acute effects of benzene exposure are dizziness, headaches and irritation on skin contact. <br /> Chronic effects include fatigue, headaches, nausea, and anomalies of the blood. The OSHA Permissible <br /> Exposure Limit (PEL) for benzene is 0.1 ppm. <br /> Toluene, ethylbenzene and xylene's potential routes for exposure are inhalation, skin absorption <br /> and ingestion. Active effects of exposure include dizziness, headaches and skin irritation. Chronic effects <br /> of exposure may include central nervous system damage. The PELs for toluene is 200 ppm, ethylbenzene <br /> is 100 ppm, and xylenes is 100 ppm. <br /> Volatile Organic Compounds (VOCs) <br /> VOCs are varied and the specifics of each compound will not be discussed. VOCs tend to be <br /> flammable and result in acute effects such as dizziness, headaches, and skin irritation. <br /> KRAZAN&ASSOCIATES,INC. <br /> Offices Serving the Western United States <br /> 95262.HSP <br />