The next stage up from a desktop search is to go for a Phase I or Phase
II investigation. Phase I is a site reconnaissance survey combined with
a desktop survey. In effect, it is a remote analysis of past uses (eg
current operations; site history; presence of storage tanks; condition of
waste areas; condition of site surface; any obvious risks of neighbouring
land use) plus a straightforward site walk-through. A Phase II
investigation involves a proper physical investigation, probably involving
taking soil and water samples with trial bore holes (this can cost
£15,000-£40,000, with a turnaround of four to eight weeks).
