One of the aims of the Environmental Protection Act of 1990 was the setting up of registers of land "put to potential contaminative use". These registers, under Section 143 of the Act, would have encompassed around 40 different classes of contamination.
The prospect of "land blight" (where the perception of contamination would in itself depress property values) , combined with one of the deepest recessions in recent times, resulted in the planned registers being shelved.
Nearly ten years on the classes of land that are now deemed to be necessary of investigation have been reduced to around a quarter of the original list.
This act of 'ethnic cleansing' of the list of classes of land put to potential contaminative usage, of course does not mean that the problem has gone away. It has only been swept (figuratively speaking) under the carpet.
In fact some organisations are still using the old section 143 classifications as a starting point to identify potentially contaminated land. If one wanted to be purist, the best approach would be to say that any industrial process had or has had the potential to contaminate !
However if you took this approach to its logical end you would'nt get out of bed in the morning, so there has to be some measure of pragmatism.
The Government (initially through the old Department of the Environment) has issued a variety of guidance documents such as the DOE Industry Profiles in an effort to identify the various industrial processes that may have polluted or contaminated. Whilst the list below is not inclusive, it is as good a starting point as any to identifying
potential hazards to health.