ModelRailroadForums.com is a free Model Railroad Discussion Forum and photo gallery. We cover all scales and sizes of model railroads. Online since 2002, it's one of the oldest and largest model railroad forums on the web. Whether you're a master model railroader or just getting started, you'll find something of interest here.
Great video DJ, lots of modelling potential, especially the roof shots!
My guess is the hoppers at Austin's carry “sodium hypochlorite pentahydrate” or some such nasty granular.