Threshold Level: Time-weighted average pollutant concentration values, exposure beyond which is likely to adversely affect human health.
Threshold level: Level established as the average rate of water use.
Threshold pollutant: Substance that is harmful to a particular organism only above a certain concentration, or threshold level.
hearing threshold level (HTL) The amount, in decibels, by which the threshold of audibility for an ear differs from a standard audiometric threshold.
Intensity, where the detection threshold level is defined as the lower limit of the perceived intensity range (by convention the lowest concentration that can be detected in 50% of the cases in which it is present).
Environmental Exposure: Human exposure to pollutants originating from facility emissions. Threshold levels are not necessarily surpassed, but low-level chronic pollutant exposure is one of the most common forms of environmental exposure.
Human exposure to pollutants originating from facility emissions. Threshold levels are not necessarily surpassed, but low-level chronic pollutant exposure is one of the most common forms of environmental exposure (See> threshold level).
Stochastic Effects: Effects that occur by chance and which may occur without a threshold level of dose, whose probability is proportional to the dose and whose severity is independent of the dose.
Major Source: A stationary facility that emits a regulated pollutant in an amount exceeding the threshold level depending on the location of the facility and attainment with regard to air quality status. (See Source.) ...
C6 : Results in limited wrist control, and complete loss of hand function.
C7 and T1 : Results in lack of dexterity in the hands and fingers, but allows for limited use of arms. C7 is generally the threshold level for retaining functional ...
 See also: Site, Organism, Threshold, Water, Environment
  
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