u/Mammoth_Negotiation7

My son set off an ammonium phosphate fire extinguisher in my garage. It was just a quick burst right next to my freezer and hot water tank. All the visible powder is swept and the visibily contaminated areas neutralized with baking soda.

How crazy do I need to get with the cleanup? The whole place was already covered in sawdust and there are tools and boxes everywhere, so it'd take days to move and clean everything...

Any advice would be welcome.