Threshold Limit Value

{
  "id": "MLC-T-ENV-028030",
  "term": "Threshold Limit Value",
  "field": "Environment",
  "definition": "1. The concentration of an airborne substance that a healthy person can be exposed to for a 40-hour work week without adverse effect; a workplace exposure standard.\n\n2. 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.\n\n3. 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: (1) TLV-TWA--Time weighted average, based on an allowable exposure averaged over a normal 8-hour workday or 40-hour work- week; (2) 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); and (3) TLV-C--Ceiling Exposure Limit or maximum exposure concentration not to be exceeded under any circumstances. (TWA must still be met.)\n\n4. 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 workweek to which nearly all workers may be repeatedly exposed, day after day, without adverse effect.",
  "abbreviation": "TLV",
  "subject": "General environmental",
  "references": [
    "Environmental Issues Terms & Acronyms; Pesticides Glossary",
    "Integrated Risk Information System (IRIS) Glossary",
    "Terms of Environment",
    "EPA 2003"
  ],
  "url": "https://mlchart.com/terminology/environment/threshold-limit-value/"
}