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n.- - 'a; -r -za+"M.�3. -.w g st�'.r-, `S„mp: "�ilm <br /> - .• � <br /> NNW <br /> yc f4�dzrer. "+ �".3"sT"�e 'ce amp: 5(T'a•.. <br /> �; �fi• ,r� ..'s�r ��x5" ... 1 �T>: { An- u �.,.I. y.. <br /> M� <br /> 4_ <br /> a <br /> w. <br />:fah <br /> i <br /> APPENDIX C <br /> Fxblanation of Hazard Evaluation Guidelines <br /> Hazards Firborne Contaminants <br /> Guideline �lanati"on <br /> Threshold Limit Value mime- The time-weighted average <br /> Weighted Average (TLV-TWA) concentration for a normal 8- <br /> hour work day and a 40-hour <br /> work week, to which nearly all <br /> workers may be repeatedly <br /> exposed without adverse <br /> effect. <br /> Permissible Exposure Limit Time-weighted average <br /> (pEL) concentration similar to (and <br /> in many cases derived from) <br /> TLV values. <br /> Immediately Dangerous to Life "IDLH" or "Immediately <br /> or Health dangerous to life or health" <br /> means any atmospheric <br /> condition that poses an <br /> immediate threat to life, or <br /> which is likely to result in <br /> acute or immediate severe <br /> health effects. This includes <br /> oxygen deficiency conditions. I <br /> Nazar • Explosion <br /> Ex�planati.on <br /> am <br /> Guideline <br /> The minimum concentration of <br /> Lower Explosive Limit (LEL) vapor in air below which the <br /> propagation of a flame will <br /> not occur in the presence of <br /> an ignition source. <br /> The maximum concentration of <br /> t Upper Explosive Limit (UEL) vapor in air above which <br /> propagation of the flame will <br /> not occur in the presence of <br /> an ignition source. <br /> The lowest temperature at <br /> Flash Point which the vapur of a <br /> combustible liquid can be made <br /> to ignite momentarily in air. <br />