Governmental Industrial Hygienists

American Conference Governmental Industrial Hygienists, ThresholdEimit Values, Cincinnati, Ohio, 1982 cf. Deutsche Eorschungsgemeinschaft, Maximale Arbeitsplat kon ntrationen, 1983, Vedag Chemie, Weinheim, 1983, p. 15. 

Threshold Emit Values andBiological Exposure Indices for 1989—1990, American Conference of Governmental Industrial Hygienists, Cincinnati, Ohio, 1989. 

The OSHA permissible exposure limit (11) and the American Conference of Governmental Industrial Hygienists (ACGIH) estabHshed threshold limit value (TLV) (12) for fluorides is 2.5 mg of fluoride per cubic meter of air. This is the TLV—TWA concentration for a normal 8-h work day and a 40-h work week. 

Formaldehyde is classified as a probable human carcinogen by the International Agency for Research on Cancer (lARC) and as a suspected human carcinogen by the American Conference of Governmental Industrial Hygienists (ACGIH). This is based on limited human evidence and on sufficient evidence in experimental animals (136). Lifetime inhalation studies with rodents have shown nasal cancer at formaldehyde concentrations that overwhelmed cellular defense mechanisms, ie, 6 to 15 ppm. No nasal cancer was seen at 2 ppm or lower levels (137). 

Threshold Eimit Values for Chemical Substances in Workroom HirHdopted byHCGIHfor 1976, paper presented at xE Hmerican Conference of Governmental Industrial Hygienists, Atianta, Ga., May 1976. 

American Conference of Governmental Industrial Hygienists P.O. Box 1937 Cincinnati, Ohio 45201 Practices, analytical methods, guides to codes and/or regulations, threshold limit values. 

The 1994—1995 threshold limit values as recommended by the American Conference of Governmental Industrial Hygienists (ACGIH) are given in Table 8. These time-weighted average values are those levels to which nearly all workers may be exposed for an 8-h workday and a 40-h work week without adverse effect (99). 

Threshold Timit Values for Chemical Substances and Physical Agents (aimual) Documentation of the Threshold Timit Values and the Biological Exposure Indices, 6th ed, American Conference of Governmental Industrial Hygienists, Cincinnati, Ohio, 1993, updated periodically. 

The U.S. Department of Labor (OSHA) has ruled that an employee s exposure to aniline in an 8-h work shift of a 40-h work week shaU not exceed an 8-h time-weighted average (TWA) of 5 ppm vapor in air. The American Conference of Governmental Industrial Hygienists (ACGIH) recommends a... 

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