Does excavation depth affect how the spoil is classified for disposal?

Not directly by depth alone — spoil classification is genuinely based on what the material actually is (clean fill, contaminated soil, rock) rather than how deep it came from, though deeper excavation can be more likely to encounter different soil layers or fill history.

This is exactly why your soil report’s borehole data matters — it gives a genuine picture of what’s likely to come out at each depth before excavation begins.

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