This report gives guidance on identifying and mitigating discolouration risks. In particular it: Explains the mechanisms by which discolouration occurs and identifies the factors which influence the risk of discolouration Reviews 170 previous discolouration incidents to identify their causes Proposes a process for assessing the risk of discolouration Gives guidance on various short-term measures for reducing discolouration risks This research is based on a literature review, a review of DWI incident assessment letters, field investigations and a workshop. The report comes with a CD ROM containing training material in the form of PowerPoint slides.
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