EXPOSURE INDICATOR

Threshold Eimit Values andBiological Exposure Indices for 1987—1988, American Conference of Government Industrial Hygienists, Cincinnati, Ohio. 

TEW and Biological Exposure Indices, 1987—1988, ACGIH, Cincinnati, Ohio, 1988. 

Documentation of the Threshold Eimit Values and Biological Exposure Indices, 5th ed., American Conference of Governmental Industrial Hygienists, Inc., Cincinnati, Ohio, 1986. 

Chemical determinant Sampling time Biological exposure indices Notation... 

American Conference of Governmental Industrial Hygienists. Threshold limit values for chemical substances and physical agents and biological exposure indices. ACGIH, Cincinnati, OH. 1999. 

Biological exposure indices (BEI) published by the ACGIH are given in Table 4.35. BEIs represent the levels of determinant which are most likely to be observed in specimens collected from a healthy worker who has been exposed to chemicals to the same extent as a worker with inhalation exposure to the TLV. Due to biological variability it is possible for an individual s measurements to exceed the BEI without incurring increased health risk. If, however, levels in specimens obtained from a worker on different occasions persistently exceed the BEI, or if the majority of levels in specimens obtained from a group of workers at the same workplace exceed the BEI, the cause of the excessive values must be investigated and proper action taken to reduce the exposure. 

It is advisable to consult the specific documentation published in the Documentation of Threshold Limit Values and Biological Exposure Indices. 

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