Editing Threshold limit value (section)

== History ==
Many people accredit the idea of government responsibility for the protection of its workers in the workplace to [[Franklin D. Roosevelt]] in the [[Great Depression in the United States|Great Depression]] era. The formation of the National Conference of Governmental Industrial Hygienists (later to be renamed the American Conference of Governmental Industrial Hygienists) in 1938 was a direct response to this idea. <ref>{{Cite book |last=Corn |first=Jacqueline K. |title=Protecting the health of workers: the American Conference of Governmental Industrial Hygienists, 1938-1988 |date=1989 |publisher=American Conference of Governmental Industrial Hygienists |others=American Conference of Governmental Industrial Hygienists |isbn=978-0-936712-84-0 |location=Cincinnati, Ohio}}</ref>

Although the first meeting of the ACGIH was held in 1938, the first exposure limits of the group were not published until 1946, then referred to as Maximum Allowable Concentrations. These standards were split into 4 categories: Gasses and Vapors, Toxic Dusts, Fumes, and Mists, Mineral Dusts, and Radiations.<ref>{{Cite web |title=Growing for You |url=https://www.acgih.org/growing-for-you/ |access-date=2024-03-30 |website=ACGIH |language=en-US}}</ref>

In 1970, the [[Occupational Safety and Health Act (United States)|US Occupational Health and Safety Act]] was signed into law,<ref>{{cite web |title=U.S. Department of Labor -- History -- Departmental Timeline |url=http://www.dol.gov/oasam/programs/history/dpt.htm |url-status=dead |archive-url=https://web.archive.org/web/20120709205219/http://www.dol.gov/oasam/programs/history/dpt.htm |archive-date=2012-07-09 |access-date=2016-11-30}}</ref> which created the [[Occupational Safety and Health Administration]] (OSHA) and the [[National Institute for Occupational Safety and Health]]. Shortly after this law passed, OSHA implemented its first Permissible Exposure Limits, which were adopted directly from the 1968 ACGIH TLVs. <ref name=":0" />

In 2008, the Sustainable TLV/BEI fund was created to allow for the continued financial support of the development of TLVs and BEIs. This fund provides "additional opportunities for raising funds to support and sustain the core mission and value of developing and promoting occupational exposure guidelines."<ref>{{Cite web |title=History |url=https://www.acgih.org/about/about-us/history/ |access-date=2024-04-17 |website=ACGIH |language=en-US}}</ref> This fund ensures that TLVs and BEIs will continue to have the necessary financial support to be created and revised in order to provide up-to-date standards.