Threshold Limit Value (TLV)

A level to which it is believed a worker can be exposed day after day for a working lifetime without adverse health effects
Reference: Chemical Process Safety – Fundamentals with Applications, 2nd Ed., Daniel A. Crowl/Joseph F. Louvar
A term to express the airborne concentration of a material to which nearly all persons can be exposed day after day without adverse effects. References: The Center for Chemical Process Safety of the American Institute of Chemical Engineers. Safety Health and Loss Prevention in Chemical Processes. 345 East 47th Street, New York, NY 10017, 1990.
Science/Toxicity/Dose and Response Models