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rt <br /> Table 1 <br /> 1(azard Exposure Guideline <br /> Cl 0aIIA 1988-89 ACGIII <br /> Cal TO <br /> PEI, -- <br /> 10 pm (TWA) i0 plNn (TWA) <br /> p <br /> Ijenzene x 25 plan (STEL} <br /> 25 Pp", (EXC) <br /> 50 ppm (Ceiling) <br /> 10U ppm (TWA) <br /> Toluene 100 pp'�r ('WA) 15U plxn (STEL) <br /> 300 ppm (Ceiling) <br /> 100 ppm (TWA) 100 ppm (TWA} <br /> Xylene 150 PPM (STEL} <br /> ppsn (TWA) 300 ppm (TWA) <br /> NO Gasoline 500 ppm (STEL) <br /> Possible contaminants that could be encountered as <br /> presently known. <br /> 5 <br />