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TABLE 1 <br /> PRIMARY CAL/OSHA PATHWAY PRIMARY SYMPTOMS <br /> COMPOUND (1) <br /> (PPM) <br /> Ethylbenzene 100 TWA Inhalation Irritation of eyes and mucus <br /> 125 STEL (3) Ingestion membranes <br /> • Headache, dermatitis, narcosis, <br /> coma <br /> SECONDARY <br /> Benzene 1 TWA Inhalation Irritation of eyes, nose, respiratory <br /> 5 STEL Ingestion system <br /> Absorption Giddy, nausea, staggered gait <br /> Contact Abdominal pain <br /> Toluene 100 TWA Inhalation Fatigue, weakness, confusion, <br /> 150 STEL Ingestion euphoria <br /> 500 CEIL (4) Absorption Dizziness, dilated pupils, insomnia <br /> Contact <br /> Notes: <br /> (2) TWA= 8 hour time weighted average <br /> (3) STEL= Short term exposure limit - The TWA concentration which <br /> workers should not be exposed for longer than 15 minutes, and which <br /> should not be repeated more than four times per day, with at least 60 <br /> minutes between successive exposures <br /> (4) CEIL=Ceiling- The concentration in the air that should not be <br /> exceeded during the exposure <br /> American Geological Services,Inc. <br /> 5 <br />