General remarks on the objectives
The general purpose of radon testing is to identify locations that have elevated radon concentrations and to determine if mitigation or remediation is needed. This requires a basic understanding of radon dynamics and development of appropriate testing procedures is necessary. In particular the determination of test locations and the definition of environmental parameters (i.e. closed windows, doors, usage of air-condition, etc.) turns out to be essential to ensure that the results are reliable, i.e. representative for the location and reproducible, as a condition to be legally valid. In big buildings these requirements are more difficult to establish in comparison to private houses. So far, little is known about Rn dynamic in different building types, as in the past efforts mainly concentrated on dwellings. On the other hand they are even more indispensable for valid measurements. As main goal we want to define a standard radon measurement protocol for each building type as defined by us; classification will orient on existing building categories. One of the first actions will consist in establishing such classification, as Big Buildings is probably a term too general to include different Rn situations. In particular, classification requires definition of classification criteria, or parameters; in our case these could include number of floors, ground floor surface, type of climatisation etc. A detailed study of existing classifications, like for example the International Building Code, should be examined to evaluate its suitability for the future protocol regarding Rn measurement. A second scheme of parameterization addresses usage of the building, like working hours or differently defined usage periods, number of persons, etc. The first general assumption to be made is the average working day duration in hours. We propose an eight hour working-day for simplification and this will be taken as exposure time per person per day. In a second phase a number of test buildings for each category will be selected and passive measurements performed.
The consortium consists of 35 members from 11 European countries.
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