Kartlegging av nyere fraksjoner av farlig avfall i bygg

English summary
7
Rapportnr.: 5014010-M01
Side: 7 av 57
Environmental specialists have suspected for some time that older building materials and
components contain environmental contaminants not among those that are well known and
documented. Some of these materials have been analysed for concentrations of a number of
environmental contaminants. This study, documents results from chemical analysis of nearly 700
samples: 81 new samples of materials and more than 600 results from completed projects. The
decision of which environmental contaminants the material samples in the older projects should be
analysed for, was based on existing knowledge about the building components and materials in
other relations than this project.
The project has resulted in important new knowledge about which building components that should
be classified as hazardous waste during demolition or rehabilitation of buildings. These are building
components that until today have been classified as residual waste.
The main results from the project are as follows:
It is likely that hard polyurethane produced up until 2003 contains CFC/HCFC gases. This material
is found in garage doors, prefabricated walls for refrigeration rooms and prefabricated insulated
outer walls, for example in pre-fabricated warehouses.
Vinyl flooring may contain a number of environmental contaminants, such as phthalates, asbestos,
lead and, in some cases PCB. In most cases flooring produced after 2000 is not hazardous waste.
Skirting boards of PVC almost always contain a measurable of phthalates and above the limit for
hazardous waste. Vinyl flooring from both demolition and rehabilitation is often treated as residual
waste today. Flooring should first be analysed and, if found to contain phthalates, disposed of
accordingly.
Roofing, folding walls and chair seats of soft PVC-sheets produced before 2000 may also contain
hazardous waste levels of phthalates and lead.
Double-glazed windows produced after the “PCB period” may contain relatively large quantities of
chlorinated paraffins, chiefly in the glue and the rubber mouldings. The production period from
1975 to 1990 appears to the period with largest the proportion of double-glazed windows containing
chlorinated paraffins.
Insulation of cellular rubber produced before 2004 is often a hazardous waste because of
brominated flame retardants’ levels. It may also contain other environmentally dangerous
substances.
Cable housings of plastic may contain quantities of lead above the limit of hazardous waste.
In addition a number of building components are identified to be further examined for their content
of indicated environmentally dangerous substances.