There are 4 stages to an Archaeological evaluation.
Stage #1
Takes place in the library: Who owned the property, any indigenous activity, possible environment issues. etc.
Stage #2
Mowing, Ploughing with a plough with long mould boards. Discing with 8' wide set of discs.
Stage #4
Gradall is used to dig trenches to remove the top soil. Or strip the area down to sub-soil.
Evaluations take a long time to perform and are very expensive. Every construction project needs evaluation.