Contact any college and or university in California that has a phtography department. They take out the silver then mix the spent chemistyr and down the drain it goes. Unless it has changed in the last 6 months they still do it. Once the B&W chems have been mixed they are no more harmful than vinegar. Creating a climate of fear and false information on this will not change it. Pyro chems oxidize rapidly and once they have are inert. Color chemistry is another matter. That has some nasty stuff in it. Jason uses B&W chems. BTW I lived across the bay from where he lives near Berkeley. Now you want the ultra hyper paranoid environment that was it.