In message
Jeff Findley wrote:

I doubt NASA is going to put anyone at risk, so the cleanup and
collection of debris and data will be slow and methodical. They're
going to want to document every bit of debris including exactly where it
was found. It's hard to do that when you're in a hazmat suit.

Elsewhere I've seen it said that the residual hypergolics isn't the main
reason for diverting the first stage landing, there are after all two
pads some distance apart. It's because it is very tricky to document the
position of any bits of debris when they've been blown about by the
exhaust from a descending Merlin.

Anthony