This is probably the most common question we get asked by clients when they are buying a site. The simple answer is almost always yes. Just last week we were asked this exact question. Our client was considering buying a brownfield site for redevelopment and had been given a two year old report prepared by others which gave the site a clean bill of health. Fortunately, they took our advice and had us visit the site to take a look. The photograph shows what we found when we sampled one of the groundwater monitoring wells: ~170mm of free-phase hydrocarbons floating on the water surface. Far from the site being ‘clean’, it had major contamination issues.