A NEW METHOD FOR MEASUREMENT OF THE INTRUSION OF VOCS TO INDOOR AIR FROM CONTAMINATED SOIL

摘要

This paper describes a new method for determination of the intrusion of VOCs from polluted soil to indoor air. The method uses an inert film to cover an area of the floor where intrusion from contaminated soil occurs. With the method, measurements of the emission can be performed on irregular surfaces such as concrete floors with cracks and pipe penetrations. From the results of laboratory and field measurements, the precision of the method is estimated to be fully acceptable for field applications. The results showed a good agreement with the flux calculated from prediction models, especially on concrete floor areas where diffusive transport is dominant. It is concluded that the method has a high potential as a tool for quantifying the intrusion from "hot spots", e.g. where cracks occur in concrete floors located at highly contaminated zones.