We have (I'm guessing here) about 5-7 55-gallon drums worth. In our agreement with the USDA to import soil, it needs to be fired when we dispose of it because its from out of state (for bugs, etc).
It doesn’t have to be truly incinerated, it just needs to be cooked at 450 deg. F (internal temperature) for 2 minutes, then its ok. We have too much to do onsite here in our little oven so I need to find a place that can handle this and I'm having trouble.
**Edit** I work at a research lab and we tested these soil samples for residues of a pesticide/herbicide/whateveryouwanttocallitcide. Its safe, the only reason it needs to be fired is because its from out of state.