Biological limit value

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The biological limit value (BGW) (old name BAT for biological work place tolerance value , Federal Law Gazette I p. 1470 ) is a limit value for the concentration of a substance , its metabolite or a stress indicator in the biological material of an employee ( Section 2 of the Hazardous Substances Ordinance). It indicates the concentration up to which the health of employees is generally not impaired. The biological test material in which the concentration of the corresponding parameter is determined can be whole blood , erythrocyte fraction of whole blood, blood plasma , blood serum or urine .

When determining the limit values, an eight-hour exposure with 40 working hours per week is generally assumed. The limit values ​​usually apply to individual substances.

Germany

In Germany, the BGW was introduced on January 1, 2005 with the new version of the Hazardous Substances Ordinance (GefStoffV). The Federal Ministry of Labor and Social Affairs sets the limit values. The Ministry is advised by the Committee on Hazardous Substances . The committee takes into account the proposals of the permanent Senate Commission for the testing of harmful substances by the German Research Foundation (DFG) and the European Union when setting limit values. The biological limit values ​​are published in the Technical Rule for Hazardous Substances 903 ( TRGS 903). The announcement is made via the Joint Ministerial Gazette (GMBl) .

According to the occupational health rule (AMR) 6.2 " Biomonitoring ", the biological limit values ​​may be used to assess biomonitoring findings that were collected from an employee as part of preventive occupational health care . If no lower national BGW has been specified for a substance, the binding biological limit value of the EU must be used in the risk assessment according to TRGS 903 . Compliance with biological limit values ​​does not release the employer from monitoring the substance concentration in the air and complying with the occupational limit value according to TRGS 900.

With the exception of acutely toxic substances, the BGW have no longer been defined as maximum values ​​for healthy individuals since 2013, but rather follow the so-called "mean value concept". According to this, the mean concentration of the examined parameter must not exceed the BGW if a person is examined several times. Health impairment cannot be inferred from a single excess of the BGW. A similar redesign was carried out by the Deutsche Forschungsgemeinschaft in 2007 and in Switzerland by Suva in 2009 for the biological substance tolerance concentration.

European Union

In the European Union, it is the task of the Scientific Committee on Occupational Exposure Limits (SCOEL) (recommendations for biological limit English value biological limit , BLV) elaborate. According to the Directive 98/24 / EC Binding biological limit values can be set (of the European Commission English binding biological limit value , Bblv) that need to be adopted as minimum standards by all EU Member States. So far, such a binding EU biological limit value has only been set for lead and its ionic compounds (98/24 / EC).

See also

Individual evidence

  1. ↑ a b c d TRGS 903 Biological Limit Values ​​(BGW), BAuA, pdf
  2. ↑ Occupational medicine rule AMR No. 6.2 Biomonitoring, GMBl No. 5 of February 24, 2014, p. 91, BAuA
  3. ↑ Technical Rules for Hazardous Substances Publication ( Memento of July 7, 2015 in the Internet Archive ) page 12, DGUV
  4. ↑ Factsheet Biological Monitoring and Biological Substance Tolerance Values ( Memento from September 24, 2015 in the Internet Archive ) Suva, Occupational Medicine Department, pdf, accessed July 4, 2015
  5. ↑ Hans Drexler, Thomas Göen, Karl Heinz Schaller: Biological working substance tolerance value - a paradigm shift from the consideration of individual values to the mean value concept. In: Occupational Medicine, Social Medicine, Environmental Medicine. Volume 42, No. 9, 2007 ( PDF ).
  6. ↑ Decision 2014/113 / EU of the European Commission to set up a scientific committee for limit values ​​for occupational exposure to chemical agents and to repeal decision 95/320 / EG
  7. ↑ a b Council Directive 98/24 / EC of 7 April 1998 on the protection of the health and safety of workers from the risks related to chemical agents at work
  8. ↑ TRGS 903 Technical Rule for Hazardous Substances 903, Biological Limit Values, BAUA, accessed June 28, 2015.

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