I just saw this on the news too. SCAREY! Does anyone have more info?
I can't speak to the spontaneous combustability of wood chips, but I can speak to the Engineered Wood Fiber we use. It pretty much looks just like wood chips, but it's actually engineered and produced. Here's what I've got on the EWF flammability.
We've got some folks on these forums who are in Parks and Rec and might have some experience with actual wood chips. Have any of you ever seen anything like what's described in the article?