Contaminated land is usually thought to be associated with heavy
industry such as gasworks
, refineries, power stations, and the like. While this is justified stereotyping, the ubiquitous and pervasive nature of contaminants means that any piece of land has a potential
to be "contaminated". After all, contamination just means something you don't want, or more formally; the presence of a substance above the concentration at which it is normally present, with an associated risk of harm to human health or the environment.