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APPENDIX B-1: MSDS DEFINITIONS <br /> (TLV-TWA) Threshold limit Value- Time Weighted Average. The time-weighted average <br /> concentration for a normal 8-hour work day and a 40-hour work week, to which <br /> nearly all workers may be repeatedly exposed without adverse effect. <br /> (PEL) Time-weighted average concentrations similar to (and in many cases derived from) <br /> the Threshold limit Values. <br /> (REL) Recommended Eposure limit as defined by NIOSH similar to the Threshold Limit <br /> Values. <br /> (IDLH) Immediately dangerous to life or heaM- Any atmospheric condition that poses an <br /> immediate threat to life, or which is likely to result in acute or immediate severe <br /> health effects. Oxygen deficiency is IDLH. <br /> (LEL) Lower Explosive Limit-The minimum concentration of vapor in air below which <br /> propagation of a flame will not occur in the presence of an ignition source. <br /> (UEL) Upper E.Vilosive Limit-The maximum concentration of vapor in air above which <br /> propagation of a flame will not occur in the presence of an ignition source. <br /> Flash Point (F.P.) The lowest temperature at which the vapor of a combustible liquid can be made to <br /> ignite momentarily in air. <br /> Vapor Pressure (V.P.) The pressure characteristic at any given temperature of a vapor in equilibrium with <br /> its liquid or solid form, often expressed in millimeters of mercury (mm Hg). <br /> Odor Threshold A property displayed by a particular compound. Low detection indicates a <br /> physiological sensation due to molecular contact with the olfactory nervous system <br /> (based on 50% of the population). <br /> Ionization Potential (1.P.) The amount of ionization characteristic a particular chemical compound displays. <br /> CONTAMINANTS PROFILE <br /> Chemical Exposure Symptoms of Overexposure Incompatibilities <br /> Route <br /> Gasoline Inhalation a Intense burning of mucous membranes,throat,and respiratory tract. Oxidizing agents <br /> flushing of Lace,staggering gall,slurred speech,mental contusion. such as hydrogen <br /> peroxide, nitric add. <br /> Ingestion . Inebriation,drowsiness,blurred vision,dizziness,confusion,vomiting, <br /> cyanosis. <br /> Skin Conact Prolonged skin contact may cause dermatitis <br /> Diesel Fuel Inhalation a Irritation to respiratory passages,headache,dizziness and nausea, Oxidizing agents <br /> Jet Fuel and/or vomiting, loss of coordination such as hydrogen <br /> Fuel Oils Ingestion peroxide,nitric acid. <br /> . Chemical pneumonitis (when oil is aspirated in the lungs) <br /> GROUNDWATE <br /> Skin Contact Irritation, rash of acne pimples and spots l II I� TECHNOLOGY <br />