> I guess that the EPA must not have been notified of the accident.
Lot's of not so nice things can show up in a coal deposit... mercury, sulphur, lead etc. Usually in small concentrations that can usually be safely ignored, unless you're having BNSF or UP deliver it directly to your site.
> I would certainly be upset with the hauler for delivering dirty coal.
I'd guessing that a front end loader operator at the coal yard put the bucket down a bit too soon and scraped up a few inches of dirt along with the coal.