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�N <br /> i <br /> EXPOSURE LIMIT <br /> COMPOUND PEL EL ED CL TWA STEL IDLH OTHER <br /> nn /k3 m /k3) m /k3 m /k3 m /k3) m /k3 <br /> Benzene 1 NKV NKV NKV 10 5 NKV Skin , <br /> Car <br /> Toluene 100 200 10 min . 300 100 150 2000 Skin <br /> per 8 hrs . <br /> Eth (benzene 100 NKV NKV NKV 300 500 NKV --- <br /> Xylenes 100 200 30 min . 300 100 150 1000 --- <br /> per 8 hrs . <br /> Gasoline 300 NKV NKV NKV 300 500 NKV <br /> PEL Permissible Exposure Limit <br /> EL Excursion Limit <br /> ED Excursion Duration <br /> CL Ceiling Limit <br /> TWA Time-Weighted Average <br /> STEL Short-Term Exposure Limit <br /> IDLH Immediately Dangerous to Life and Safety <br /> [car] substance identified as a suspected or confirmed carcinogen <br /> [skin] substance may be absorbed into the bloodstream through the skin , <br /> mucous membrane or eyes <br /> Contact with hydrocarbon-based fuels may result in dermal irritation due to desiccation. <br /> Respiration of air laden with hydrocarbon vapor may result in oxygen deficiency, central <br /> nervous system depression or irritation of the mucous membranes. Mixtures of air and <br /> hydrocarbon fuels can present an explosion hazard. <br /> 4. 2 PHYSICAL HAZARDS <br /> Physical hazards present at Cal Tk site are included but not limited to the following: <br /> • thermal stress; <br /> Environeering, Inc. Project No, 00-004.03 Page 4 <br />