Ms Geraldine Larkin:

If we look at IS 465, we see that the original IS 465 had two purposes. The first was to develop a test methodology to identify primarily mica and pyrite. In fact, the test currently developed by the technical committee does identify the presence of pyrrotite and other sulfates. The second part of IS 465 outlines what happens after we find a deleterious material, whether that is mica, pyrite or pyrrotite, in terms of the remediation of the property and its structure. The provisions of IS 465 dealt with pyrite and mica, because at the time that was the scientific information available to us in terms of what was causing the damage. The challenge for us now is to look and understand, through the research that has been previously mentioned, the extent of the damage that might or might not be caused by these other substances that have now been identified.