By Pass the Town entirely, and harp on the EPA. The State DEP wont hit the Town as hard as the Feds will. Wether this is a town landfill or not, I'd bet you've got trace toxic chemicals in that ground near your home. You MUST contact EPA first, then, let DEP know about the situation but inform them the EPA has already been notified. Don't quit till you see the guys in the white suits show up.

Don't worry about heads rolling in town. Odds are pretty good a criminal act is occuring.