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F <br /> t <br /> Table 3. Chemical Characteristics and Exposure Level Information <br /> ;e. <br /> Highest <br /> concentration OVAc a <br /> detected in relative IDLHf Flammable Odor ai.t,P <br /> Chemical samples Ipb response TLVd Ievel range concentration <br /> Benzene 1.1 ppma 9,25 150 10(1)e Caf 1.3-7.1% 4.68 ppm <br /> Toluene 1.5 ppm 8.82 100 100 2,OGO 1.3-7.1% 0.17-40 ppmg <br /> Xylene <br /> isomers 13 ppm 8.4418.56 111-116 100 1,0W, 1.0-6.0% 0.47-3.7 ppm <br /> 1.I-7.0% E <br /> aparts per million. <br /> bIonization potential in eleetron-volts (eV). <br /> 'Century Organic Vapor Analyzer relative response to the compound in percent. ; <br /> dThreshold Limit Value as the time-weighted average (TWA) airborn;, concentration in parts per million, published by the <br /> American Conference of Governmental Industrial Hygienists (ACGIH), 1988-1989. <br /> eI'he permissible exposure level for benzene is 1 ppm, as established by OSHA and Cal/OSHA regulations. <br /> flmmediately dangerous to life and health level, in parts per million, as published by National Institute of Occupational Safety <br /> and Health, Publication Number 85-114, September 1985. Ca = Carcinogen. <br /> 901factory fatigue can cause inability to detect compounds by odor due to duration of exposure or concentr,.tion of compounds i <br /> in air. <br /> � t <br /> 4 <br />