Well, my goodness. It looks as though the people in the path of that massive ash spill are going to be, um, immunologically challenged!

Yes, despite offical assurances, it turns out there's all kinds of nasty stuff in the sludge. And surprise, surprise - the EPA knew, because they'd already released a study:

The risk assessment examined 181 coal combustion waste disposal sites throughout the country and found that unlined coal ash waste ponds pose a cancer risk 900 times above what the government considers "acceptable." The report also found that coal ash disposal sites release toxic chemicals and metals such as arsenic, lead, boron, selenium, cadmium, thallium, and other pollutants at levels that endanger human health and the environment.

"Clean" coal, huh?