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=: Table 1 <br /> Hazard Exposure Guidelines' <br /> COMPOUND CAL OSHA 1990-,91 ACGIM <br /> PEL TLV . <br /> Benzene 1 ppm (TWA) 1 ppm (TWA) <br /> 5 ppm (STEL) <br /> Toluene 100 ppm (TWA) 100 ppm (TWA) <br /> 150 ppm (STEL) 150 ppm (STEL) <br /> Ethylbenzene 100 ppm (TWA) 100 ppm (TWA) <br /> 125 ppm (STEL) 125 ppm (STEL) <br /> Xylenes 100 ppm (TWA) 100 ppm (TWA) <br /> 150 ppm (STEL) 125 ppm (STEL) <br /> Diesel 100 ppm (TWA) - <br /> NOTES: <br /> CAL OSHA = California Occupational Safety and Health <br /> Administration <br /> PEL = Permissible Exposure Limit <br /> ACGIH = American Conference of Governmental <br /> Industrial Hygienist <br /> TLV = Threshold Limit Values <br /> TWA = Time Weighted Average (8 hour) <br /> STEL = Short Tenn Exposure Limit <br /> = Possible Contaminants that could be <br /> encountered as presently known <br /> PERSONAL PROTECTIVE EQUIPMENT <br /> A minimum of US EPA level D protection will be required within the exclusion zone for any <br /> workers engaged in sample collection or other activities. Level D protection will include: <br /> • Disposable Tyvek coverall (When in contact with contaminated material) <br /> • Boots with steel toe <br /> SAFETY.W P <br />