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Liedtke M.,Institute For Arbeitsschutz Der Deutschen Gesetzlichen Unfallversicherung Ifa
HNO | Year: 2010

The bulletin for occupational disease no. 2301 in the annex of the Occupational Disease Act, noise-induced hearing impairment, ("Merkblatt zu der Berufskrankheit Nr. 2301 der Anlage zur Berufskrankheiten-Verordnung: Lärmschwerhörigkeit") states that sound events with an intensity exceeding 137 dB (C) may cause immediate mechanical damage to the inner ear. Up to now a distinction has been made between prevention and actual damage potential for the risks caused by sounds with extremely high peak levels. In the field of prevention the unweighted sound pressure peak level of 140 dB, which is now 137 dB(C,peak) according to the LärmVibrationsArbSchV, was applied as the trigger threshold for measures; in contrast actual hearing impairment was not found until150-160 dB. This article compiles the current state of knowledge and demonstrates that in the area of the reasons mentioned here for acute hearing impairment, no scientifically based new findings exist especially with reference to publications listed in the bulletin. © Springer-Verlag 2010.


Bochmann F.,Institute For Arbeitsschutz Der Deutschen Gesetzlichen Unfallversicherung Ifa | Morfeld P.,Evonik Industries | Morfeld P.,University of Cologne
Gefahrstoffe Reinhaltung der Luft | Year: 2011

Owing to fluctuations in pollutant concentrations over time, measurement and averaging time has a key effect on the value obtained. Long-term concentrations and long-term exposure data cannot therefore be applied directly 1:1 to shift durations. For the necessary conversion of mean concentration data from long-term studies to a shift limit value, this article describes how to derive a suitable factor. The factor is based on the assumption of a log-normal distribution of measured values and on their empirically estimated geometrical standard deviations. Conversion factors between 2.5 and 7 have been obtained for a 97.5 percentile. If there is no knowledge of the measured value distribution, a factor of at least 2 to 3 can be assumed with a conservative presupposition of a 97.5 percentile. These considerations have been incorporated in a MAK Commission document on this subject.


Measuring methods for hazardous substances in work areas have to satisfy high quality requirements, because, on the basis of the measurement results, workplaces are evaluated in the course of risk assessment and measures initiated. The Technical Committee "Assessment of workplace exposure to chemical and biological agents" responsible at the European Committee for Standardization and Working Group 2 "General requirements relating to measuring methods" responsible for umbrella standards have redefined the basic requirements relating to measuring methods in EN 482 and completely revised the derivative standards EN 838, EN 1076 and EN 13890. The new versions contain the requirements relating to both sampling devices and measuring methods in order to create the preconditions for a Europe-wide uniform assessment strategy for measuring methods for hazardous substances and improve the comparability of measuring methods. The overall approach of the new standards also includes, for the first time, estimates of measurement uncertainty in the sampling of inhalable and respirable particles. The new approach is presented with reference to the example of EN 1076 and the calculation of the extended measurement uncertainty is explained with reference to a measuring method for 2-methylpentane developed at the Institute for Occupational Safety and Health of the German Social Accident Insurance (IFA).


Ellegast R.P.,Institute For Arbeitsschutz Der Deutschen Gesetzlichen Unfallversicherung Ifa
Zentralblatt fur Arbeitsmedizin, Arbeitsschutz und Ergonomie | Year: 2010

In order for work-related musculoskeletal diseases to be prevented, physical workloads at the workplace must be recorded and analysed. Numerous methods are available for this purpose. They differ however in terms of the delivered accuracy of workload measurement and analysis and with regard to the user groups. The present paper provides an overview of principle categories of methods employed for the recording and analysis of physical workloads mainly applied in Germany. Examples are stated and future issues described for each category.


Pelzer J.,Institute For Arbeitsschutz Der Deutschen Gesetzlichen Unfallversicherung Ifa
Gefahrstoffe Reinhaltung der Luft | Year: 2013

Evaluation of exposure to nanomaterials at workplaces, which is complex and is still the subject of ongoing research, requires a suitably adapted database Co-operation at international level would enable meaningful statistics to be generated as soon as possible. This would expand the pool of data and at the same time permit harmonization of the measurement strategy, assessment and evaluation. The international expertise contributed by the PEROSH institutes during development of the Nano Exposure and Contextual Information Database (NECID) also assures that the database is of high quality and is practice-relevant for OSH-research purpose. The current progress of the NECID database will also be discussed with international experts outside the PEROSH group, at NanOEH 2013 e.g., in order to increase the positive effects of a harmonization and the enlarged data pool if possible.

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