Existing construction
If an old concrete base is being retained, check cracking, movement and suitability for the proposed resin system.
Why it matters for your tarmac surfacing: Photograph defects and previous patches so the retained layers and any rebuilding can be discussed separately. For tarmac surfacing, it can affect excavation, compaction, course depths, drainage, edge support and the handover programme.
Useful photograph: the whole existing surface plus close views of cracks, movement or patches.