Landfills don't die!

I'm playing SimCity 4 and a while ago I zoned for a landfill because I forgot about sanitation. Then I realized that there's much more environmentally friendly ways of taking out the trash. I've dezoned most of it, but now I have a 2x2 square fo landfill that won't go away. Can't delete it, can't remove it, can't destroy it. I got bored and tried using the disasters to get rid of it. Nothing works! I frickin' grew a volcano on top of it and it's still there! Does anyone know how to trash the thing (pun intended)?