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1000
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Abstract/Summary
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This report provides comprehensive information on the assessment of possible chemical factors in indoor working areas and on the conditions for the measurement of all relevant substances in indoor areas. The indoor workplace measurement strategy is based on the guidelines on ventilation of indoor workplaces given in Technical Rules for Workplaces (ASR A3.6). Initially an indoor workplace is intensely ventilated (3 minutes (winter) to 10 minutes (summer)) and subsequently windows and doors are closed. Measurement is carried out one hour after closure of doors and windows. The measurement results obtained under these conditions (terms of use conditions) are suitable for comparison with guide values. Should these values be exceeded, then measures according to the recommendations issued by the German Committee on Indoor Guide Values should be taken. The effectiveness of these measures must be checked. If it is necessary to obtain additional information on sources in the work space, then measurement should be carried out under equilibrium conditions. For this purpose the space is thoroughly ventilated and subsequently kept closed for at least 8 hours (overnight as a general rule). Sampling is then carried out in the unventilated room. This measurement strategy was used to derive reference values (e. g. DGUV reference values) for indoor workplaces. It is advisable to carry out both measurements in series. Measurement under equilibrium conditions is carried out first, followed by measurement under terms of use conditions. In addition, the report gives guidance how to calculate the TVOC value und a detailed checklist is included which is specifically adapted to the requirements presented by indoor working areas.
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