Comment by senko

Yeah this was a few trees at the edge of the forest leaning over some houses, needed clearing. "Should be fine", but they're not keen on taking the (personal, physical) risk.

Thing is, you can't narrow it down to some acceptable level of risk. Mines are by definition stealthy, the only way to reduce the risk is to eliminate it by combing over everything, which is extremely hard, tedious, expensive, etc.