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� �, '� ` su. � a ,�n� .ea ..,-� .c, w `" .. ,«�' �•.'�'"7 i .w,�,,,�4 .�a•,, r�rµ��' ,¢,.��M^"�s 1'7 .fid wy 5 <br /> r <br /> B � <br /> 5 of 6 Pages <br /> r <br /> The hazardous chemicals that may be encountered ,atthe site are <br /> petroleum hydrocarbons, including benzene, <br /> thyl <br /> benzene, and xylene. A summary of relevant chemical physical <br /> and toxico3,;:5ical properties for each chemical hazard is listed <br /> below. <br /> Benzene: <br /> Beasene is a colorl(-.-s liquid with an aromatic odor. It is a <br /> relatively volatile chemical (vapor pressure = 75 mm Hg @ 68 F) <br /> that may possibly he present in soils in both the liquid or <br /> vapor form, The flash point of benzene is only 12 F thereby <br /> classifying it as a flammable liquid. Benzene is recognized by <br /> the National Institute of Occupational Safety and Health as a <br /> potential human carcinogen, <br /> z <br /> Benzene can enter the body through all four routes of exposure: <br /> (1) inhalation; (2) absorption; (3) ingestion; and (4) <br /> injectioi:. Target organs are the blood, central nervous system, <br /> skin bone marrow, eyes, and respiratory system. Acute exposure <br /> effects include irritation of the eyes, nose, and respiratory <br /> system as well as headache, nausea, staggered gait, depression, <br /> and abdominal pain. The chronic effects of over-exposure is the <br /> potential for cancer. The FEL for benzene is 14. 0 ppm. <br /> Toluene: <br /> Toluene is a colorless liquid with an aromatic odor. it is less <br /> volatile than benzene (vapor pressure = 22 mm Hg @ 66 F) and may <br /> possiliquid and <br /> or <br /> flashbly be point ofesent in toluene ist40tFeclassifyiing it as state. <br /> as aflammable <br /> liquid. <br /> � Toluene can enter the body through all four routes of exposure: <br /> ( 1) inhalation; (2) absorption; (3) ingestion; and (4) <br /> injection_. Target organs are the central nervous system, liver, <br /> kidneys and skin. Acute exposure effects include fatigue, <br /> dizziness, headache, euphoria, dilated pupils, paralysis. The <br /> PEL for toluene is 200 ppm. <br /> Ethyl Benzene: <br /> Ethyl benzene is a colorless liquid with an aromatic odor. It <br /> has a relatively low volatility ( vapor pressure = 7. 1 mm Hg (s <br /> 68 F) and may possibly be present in both the liquid and vapor <br /> -- <br /> state. The flash point of ethyl benzene is 59 F classifying it <br /> as a flammable liquid. <br /> Ethyl benzene can enter the body through 311 four routes of <br /> e;tposure: (1) inhalation; (2) absorption, (;) ingestion; and ( _} <br /> injection. Target organs are the upper respiraLDr�� <br /> sjstem, skin and ventral nervous system. Acute expos:ura effect; <br /> ose and <br /> include irritation of the; eyes and mucous membranes, n <br /> i <br />