Well right now it's just the one Molly and not pronounced enough to attempt to capture in a photo...just an obsessed hobbyist watching closely.
Are you referring to the toxic contaminant issues in the Puget sound region?
Generally speaking, once processed and with some exception, most rocks from the yard are fine - I'd steer clear of any wood tho - they're a bit pricey, but I've seen some ceramic driftwood pieces at the LFS that look really good.
There is something cool about a nice piece of driftwood (or facsimile) as a center piece with rocks at sides and/or back drop.
Dirft wood. It's not a toxic cess pool, but I do worry a little. It's mostly that it is salt water, and I run fresh water. Worried about salt leeching mostly. I'd let it soak for a few weeks, than bake it in an oven to kill it.
As for rocks, who knows what bugs and bacteria/moss/algae. I'm thinking of going hiking to a river and see what I can find. That and I live near a few landscape/gravel pits.
Thanks for the ideas. I have some fake makapi (spelling) wood. Just looking for soemthing to put an anubis on.