§ Mr. Peter AinsworthTo ask the Secretary of State for Environment, Food and Rural Affairs if she will make a statement on the health implications of using recycled ash in building materials. [18546]
§ Margaret Beckett[holding answer 27 November 2001]: We have no evidence that the use of recycled incinerator bottom ash (IBA) in building materials is a significant source of human exposure to any substance, but we are undertaking research in order to make further quantitative estimates of exposures by this route.
As regards exposure to dioxins, latest industry figures for IBA going into the construction industry indicate dioxin levels of less than 25ng/kg I-TEQ (1999 AEAT figures for normal urban soils in the UK show a mean of 28ng/kg I-TEQ). There is limited information available on the levels that may be found in other construction materials, and there are no recommended acceptable levels. However we are awaiting the results of independent research into the health and environmental implications of using IBA in construction (including roads and the manufacture of building blocks). Initial indications are that exposure to dioxins from roads constructed with material incorporating IBA is negligible.
The Environment Agency is currently carrying out a full investigation into the destination of ash from incinerators, the environmental implications of its use and what steps may be needed in the light of these findings. The results of the investigation will be made public and any necessary action will be taken.