Threshold Limit Value. The concentration of an airborne substance to which an average person can be repeatedly exposed without adverse effects. TLVs may be expressed in three ways: TLV-TWA-Time-weighted average, based on an allowable exposure averaged over a normal 8-hour workday or 40-hour workweek. TLV-STEL-Short-term exposure limit, or maximum concentration for a brief specified period of time, depending on a specific chemical (TWA must still be met). TLV-C-Ceiling exposure limit, or maximum exposure concentration not to be exceeded under any circumstances (TWA must still be met).

Threshold Limit Value. A number that tells the concentration of a chemical in air that a worker may breathe for a given period of time (a dose) without experiencing adverse effects. The American Conference of Governmental Industrial Hygienists, ACGIH, publishes TLVs for about 500 substances. OSHA uses similar limits called Permissible Exposure Limits, PEL.

Threshold Limit Value, an exposure limit recommended by the ACGIH (see " What are exposure limits?", Understanding Toxic Substances).

refers to airborne concentrations of substances and represents a condition under which it is believed that workers may be repeatedly exposed day-after-day without adverse health effects.

Threshold Limit Value. A term ACGIH uses to express the maximum airborne concentration of a material to which most workers can be exposed during a normal daily and weekly work schedule without adverse effects. Workers means healthy individuals; "healthy" is defined as a 150 lb. male, age 25-44. The young, old, ill, or naturally susceptible have lower tolerances and need to take additional precautions. TLV's. are expressed in 3 ways: C, TWA, STEL.

Threshold Limit Value. the measure of toxicity effect. It is the limit of concentration of a substance in the air that an average person can tolerate without any adverse effect for a period of eight hours of continuous exposure. The TLV is assigned by the American Conference of Governmental Industrial Hygienists (ACGIH).

threshold limit value. A pulmonary function indicator noting the point at which a physiological effect begins to be produced.

Threshold limit value. TLV is a proprietary name registered by the American Conference of Governmental Industrial Hygienists (ACGIH) and refers to airborne concentrations of substances or levels of physical agents to which it is believed that nearly all workers may be repeatedly exposed day after day without adverse effect.

Threshold Limit Value. A list published yearly by the American Conference of Governmental Hygienists as a guide for exposure concentrations that a healthy individual normally can tolerate for 8 hours a day, five days a week, without harmful effects. Airborne particulate concentrations are listed as milligrams per cubic meter of air (mg/m3), and gaseous concentrations are listed as parts per million (ppm,) by volume.

An exposure level under which most people can work consistently for 8 hours a day, day after day, with no harmful effects.

Threshold Limit Value; the airborne concentration of a material to which nearly all persons can be exposed day after day, without adverse effects.

Threshold Limit Value. The maximum airborne concentration of a compound to which a person can be exposed to on a daily 8-hour basis. TLV® is the registered trademeak of the American Conference of Governmental Industrial Hygienists.

Threshold Limit Value indicates the concentration of a chemical substance in the atmosphere that is considered non-hazardous in a person's normal working life.

Threshold limit value. Recommendation provided by the American Conference of Governmental Hygienists (ACGIH) and National Institute of Occupational Safety and Health (NIOSH) as a guideline for the control of potential health hazards in the workplace.

Threshold Limit Value. American Conference of Governmental Industrial Hygienists recommended exposure limits.  Consensus standards.

Threshold limit value. An exposure limit recommended by the ACGIH. There are three types of ACGIH TLVs: TLV-TWA: The allowable time-weighted average concentration for a normal eight-hour work day. TLV-STEL: The short-term exposure limit or maximum average concentration for a continuous 15-minute exposure period. TLV-C: The ceiling limit, or maximum concentration that should not be exceeded even instantaneously.

Threshold Limit Value. the maximum permissible concentration of a substance typically expressed in ppm that a worker may be exposed to for 8 hours (sometimes 40 hours). TLV is a legally mandated safety limit.

see Threshold Limit Value

Threshold Limit Value. The highest allowable air concentration of a chemical in which workers may work for many years (8 hours a day, 40 hours per week) without negative health effects. Expressed as milligrams (mg) per cubic meter of air (mg/m3). The level to which persons may be exposed for an 8-hour workday without adverse effects.

Threshold Limit Value. Airborne concentrations of substances devised by the ACGIH, that represents conditions under which it is believed that nearly all workers may be exposed day after day, with no adverse effect. TLVs are advised exposure guidelines, not legal standards, that are based on evidence from industrial experience, animal exposure or human studies when they exist. Three types of TLVs are: Time-weighted Average, Short Term Exposure Limit and Ceiling. See also PERMISSIBLE EXPOSURE LIMIT.

Threshold Limit Value (set by the American Conference of Gov- ernment Industrial Hygienists, ACGIH), the airborne concentration of a substance to which nearly all workers may be exposed without adverse health effects

THRESHOLD LIMIT VALUE. An airborne concentration of a substance to which indoor workers may be exposed repeatedly without adverse effects.

Health Threshold Limit Value

the maximum permissible concentration of a material, generally expressed in parts per million in air for some defined period of time (often 8 hours). These values, which may differ from country to country, are often backed up by regulation and therefore may be legally enforceable. See "Exposure Limits".

threshold limit value. Concentration in air of a substance to which it is believed that most workers can be exposed daily without adverse effect (the threshold between safe and dangerous concentrations). These values are established (and revised annually) by the American Conference of Governmental Industrial Hygienists) and are time-weighted concentrations for a 7 or 8 hour workday and a 40 hour workweek. For most substances the value may be exceeded, to a certain extent, provided there are compensatory periods of exposure below the value during the workday (or in some cases the week). For a few substances (mainly those that produce a rapid response) the limit is given as a ceiling concentration (maximum permissible concentration - designated by "C") that should never be exceeded

Threshold Limit Value. The American Conference of Governmental and Industrial Hygienists (ACGIH) has reviewed several hundred existing chemicals in order to provide industrial hygienists with an evaluation of health hazards they may pose in the workplace. The TLV, established by ACGIH, is the limit to which nearly all workers may be repeatedly exposed day after day without adverse effect. The airborne concentration is expressed as TLV/TWA or TLV/STEL (Short-Term Exposure Limit).

Threshold Limit Value. A time-weighted average concentration under which most people can work consistently for 8 hours a day, day after day, with no harmful effects. A table of these values and accompanying precautions is published annually by the American Conference of Governmental Industrial Hygienists.

Threshold limit value. This term expresses the airborne concentration of a material to which healthy workers can be routinely exposed without adverse effects. The young, old, ill or naturally susceptible have lower tolerances and need additional protection.

Threshold Limit Value - A term used to signify limits in gas exposure. TLV is used as a prefix for TWA and STEL.

Threshold Limit Value. Time-weighted average concentration of an air pollutant at the workplace for a conventional 8-hour workday and a 40-hour workweek, to which nearly all workers may be repeatedly exposed without adverse health effects.

TLV is the Threshold Limit Value, the workplace exposure limit recommended by ACGIH.

Threshold Limit Value. Recommended guidelines for occupational exposure to airborne contaminants published by the American Conference of Governmental Industrial Hygienists (ACGIH). TLVs represent the average concentration in mg/m3 for an 8-hour workday and a 40-hour work week to which nearly all workers may be repeatedly exposed, day after day, without adverse effect.

THRESHOLD LIMIT VALUES. Represents the air concentrations of chemical substances to which it is believed that workers may be exposed daily without adverse effect.

A registered trademark for an exposure limit developed by the American Conference of Governmental Industrial Hygienists (ACGIH). A listing of TLVs may be found in the ACGIHâ€(tm)s Documentation of the Threshold Limit Values and Biological Exposure indices for 1988-1989.

Threshold limit value. an occupational exposure value to which nearly all workers can be exposed day after day for a working lifetime without ill effect.

typed length value. TLV advertises the reconnect time, recovery time, and FT flag to a node's peers.

Type-Length-Value. A tuple within a DOCSIS or PacketCable configuration file.

Type Length Value. Dynamic format for storing data in any order. Used by Cisco's Generic ID PROM for storing asset information.