5.5 Limiting the areas in which Asbestos dust may arise
Work areas in which Asbestos or Asbestos containing products are
processed cannot typically be kept completely free of Asbestos dust, at least
not through room air exhausting.
For this reason, such areas must be labelled and isolated so
that the exposure cannot be carried over to neighboring rooms. This presumes an
areal separation between Asbestos operations and others. Whether air transfer
tubes are needed to prevent the spread of contaminated air depends on the
individual case. Frequently, a slightly lower pressure in the contaminated area
The Asbestos particulates exhausted from the operating stations
and rooms must be cleaned in particulate filters before being released outdoors.
Filtering separators are used for the cleaning of Asbestos contaminated exhaust.
The guideline value for the cleaned air emitted is defined as 0.1 mg/m³ in
the Technical Instructions on Clean Air (Technischen Anleitung zur Reinhaltung