Info needed - cleaning old sand

[blacknife]

planing something out last night, i dug into the old sand bucket thats been sitting for months... it did not smell to bad but there were some pretty black areas in it that cant be to good for reuse without a good rinse, but then it was kind of black when i pulled it out. i would think if it looks and smells healthy and your cycling anyways that it would not be that bad with just a quick rinse.

I think i will try to cook mine then use it to make some frag plugs or some other kind of aggrocreete so its not a total waste.