Making an area look normal is not the same as dealing with it
The instinct with a spill is to remove the visible evidence quickly. On a hardstand draining to a stormwater system that instinct can be exactly wrong, because washing a surface may move material somewhere considerably harder to deal with. A cleaning crew is not the right party to be making that judgement under pressure, and no scope should require them to. A surface that looks normal is not evidence that anything has been resolved.
The workable instruction is narrow. Contain and isolate where that can be done safely, do not introduce water to a spill near a drainage point, record what was observed, and report it immediately to the nominated contact. What happens next is a decision for the estate manager, the owners corporation or the occupier concerned, depending on where the material came from and what it is.
