[pure-silver] Disposing of pyro

Well, I decided on a radical departure from my normal film processing 
(Diafine) - Wimberley WD2D+. I'll try it out and see if I can handle 
the restrictions. ("[Developer] must be used within 3 minutes of 
mixing to ensure consistent results")

Reading thru the included lit, I wonder if the pyro is sufficiently 
'neutralized' by exposure to oxygen and use in development to make it 
fit for pouring down the drain.

Does anyone have some guidance on how safe it is to pour used WD2D+ 
down the drain (city water/sewer)? Should I mix it with the used stop 
bath?

Thanks in advance
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