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D. HAZARD EVALUATION <br />Potential chemical hazards include skin and eye contact or inhalation exposure to potentially <br />toxic concentrations of hydrocarbon vapors. The potential toxic compounds that may exist at <br />the site are listed below with descriptions of specific health effects of each. The list includes <br />the primary potential toxic constituents that may be found at sites which previously handled <br />petroleum hydrocarbons, including home heating diesel fuel. <br />1. Benzene <br />a. Colorless to light yellow, flammable liquid with an aromatic odor. <br />b. Toxic hazard by inhalation, adsorption, ingestion and skin and/or eye contact. <br />C. Exposure may irritate eyes, nose and respiratory system and may cause acute <br />restlessness, convulsions, nausea, or depression. Benzene is carcinogenic.* <br />d. Permissible exposure level (PEL) for a time weighted average (TWA) over an <br />eight hour period is 1.0 ppm. <br />2. Toluene <br />a. Colorless liquid with a sweet, pungent, benzene like odor. <br />b. Toxic hazard by inhalation, adsorption, ingestion and skin and/or eye contact. <br />C. Exposure may cause fatigue, weakness, confusion, euphoria, dizziness, <br />headaches, dilated pupils, lacrimation, nervousness, insomnia, paresthesia, and <br />dermatitis. <br />d. Permissible exposure level for a time weighted average over an eight hour period <br />is 100 ppm. <br />3. X, lv ene <br />a. Colorless liquid with an aromatic odor. <br />b. Toxic hazard by inhalation, adsorption, ingestion and skin and/or eye contact. <br />C. Exposure may irritate eyes nose and throat and may cause dizziness, excitement, <br />drowsiness, incoordination, corneal vacuolization, anorexia, nausea, vomiting, <br />and dermatitis. <br />d. Permissible exposure level for a time weighted average over an eight hour period <br />is 100 ppm. <br />4. Ethylbenzene <br />a. Colorless liquid with an aromatic odor. <br />b. Toxic hazard by inhalation, ingestion, and skin and/or eye contact. <br />Ethylbenzene is carcinogenic.* <br />C. Exposure may irritate eyes and mucous membrane and may cause headaches, <br />dermatitis, narcosis and loss of consci ousness. <br />d. Permissible exposure level for a time weighted average over an eight hour period <br />is 100 ppm. <br />* Known to the State of California to cause cancer. <br />