Are these alder chips ruined for other mushrooms?

I have had two truckloads of alder chips in various containers and in a giant pile covered by a tarp. They've been there two months now. I don't even know if November is a good time to chip alder for mushroom media. The ones in containers are open to the rain and air. I had to reclaim one of the rain barrels today and surprise surprise these guys have been working on the contents.

RADICAL MYCOLOGY says P. Cyanescens often occurs on alder chip piles. I was hoping To use these chips for my own mushroom cultures and for mulch, but would I be able to use them as media by soak-fermenting them now? I'm sure theyd be fine for mulch, but are they any good for mushrooms at this point?