threshold limit value


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threshold limit value

[′thresh‚hōld ′lim·ət ‚val·yü]
(medicine)
The average concentration of toxic gas to which the normal person can be exposed without injury for 8 hours per day, 5 days per week for an unlimited period; differs slightly from maximum allowable concentration in that threshold limit value is an average concentration. Abbreviated TLV.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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The expert also considered the known amount of volatile organic compounds that were used in the resurfacing process, the manner in which those compounds would have dissipated in the gymnasium--including the weather at the time the solvents were used--and the pathways of exposure in concluding that plaintiff's exposure approached the threshold limit value for toluene (id.
TLVs and BEIs: Based on the documentation of the Threshold Limit Values for chemical substances and physical agents and Biological Exposure Indices.
[T.sub.i] = the threshold limit value of that substance."
Some of the precaution measures to be taken when using flux cored arc welding include: * the necessity to use plenty of ventilation and/or local exhaustion at the arc, to keep the fumes and gases below the threshold limit value within the worker's breathing zone and the general work area * it is recommended to use respiratory protective devices (RPD) when welding in a confined space or general work area where local exhaust and/or ventilation does not keep exposure below the threshold limit value (figure 1, 2, 3) * the welders should wear a helmet or face shield with a filter lens shade number 12-14 or darker * the personnel must wear approved head, hand and body protection which help to prevent injury from radiation, sparks and electrical shock.
In contrast the mean respirable dust concentrations was 3.28 mgm-3 which is higher than Threshold Limit Value (TLV).
For lead, the updated version included the new threshold limit value, which dropped from 0.15 mg/[m.sup.3] to 0.05 mg/[m.sup.3].
Additionally, OSHA mandates that workers do not exceed the "threshold limit value" listed on material safety data sheets for exposure to dust of all potentially harmful construction materials.
The American Conference of Governmental Industrial Hygienists (ACGIH) excursion limit for CO is 125 ppm (or five times the threshold limit value time weighted average [TLV-TWA]), which should not be exceeded under any circumstances.
* Airborne Volatile Organic Compounds (VOCs) were well within the threshold limit value - less than 0.01ppm;
If levels found after testing are above the permissible exposure limit (PEL), also known as the threshold limit value (TLV), appropriate measures are immediately taken to insure that employees are not exposed to harmful chemical levels.
Currently there is a threshold limit value of 0.02 parts per million.
The American Conference of Governmental Industrial Hygienists' threshold limit value for formaldehyde is __.

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