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. ._ _inn ..,c_: ��• �"---���r-max- rcmF- - . - � - �.. <br /> e <br /> f:1proj-&\531-002khLe&ah <br /> 4.2.1 Aromatic Petroleum Distillates <br /> MATERL4L CAS # RECOMMENDED HAZARD EXPOSURE LIMITS <br /> Type Concentratlon Source Agency <br /> Benzene 71043-2 8-hr. TWA 10 ppm ACGIH <br /> STEL 25 ppm ACGII? <br /> Toluene 108-88-3 8-hr. TWA 100 Ppm ACGIH <br /> STEL 150 ppm ACGIH <br /> Ethyl 10041-4 8-hr.TWA 100 ppm ACGIH <br /> Benzene STET, 150 ppm ACGIH <br /> Xylenes 1330-20-7 8-hr. TWA 100 ppm ACGIH <br /> F STEL 150 ppm �ACGIH [ <br /> otes: A- 1me ei to Average = time p eco hrs. Dont entratlon ppm 8 his. {` <br /> STEL-Short Term Exposure Limit (15 minute TWA) for: <br /> Benzene = 25 ppm <br /> Toluene = 150 ppm <br /> Ethyl Benzene = 125 ppm <br /> Xylrnes 150 ppm <br /> These materials are corrhmon constituents of gasoline. They are colorless liquids with <br /> strong aromatic petroleum Hydrocarbon-like odors. They are flammable, moderately <br /> volatile, their vapors are header than air and they have low solubility in water. <br /> Exposure to these materials in excess of their 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 can include head aches, nausea, drowsiness, dizziness and <br /> loss of coordination. Prolonged exposure can result in unconsciousness and coma. <br /> Although not toxic by skin adsorption, these materials are adsorbed through the skin and <br /> may contribute to other routes of exposure. They all defat the skin. There is some . <br /> evidence that prolonged and repeated exposure may result in a condition known as"solvent <br /> sindrome"characterized by reversible central nervous system damage. There is also some <br /> evidence to indicate that'roiuene may sensitize the heart,predisposing exposure victims to <br /> cardiac arrhythmias: Gasoline containing Benzene,Toluene,Ethyl Benzene and Xylenes <br /> _ <br /> _--maybe-potentially-carcinogenic._Benzene_is_a_known_human_carcinogen_and_has_been, <br /> l <br />