Just to finish the point, though, in terms of the chemicals in your home, you actually do literally pour them down the drain into the water supply. So in terms of a comparison, we're putting it somewhere where it doesn't get out, while people in their homes are putting it down drains into the water treatment facilities.
With respect to where the risks really are, the risks are really in terms of surface spills. Typically, when it comes back up to the surface, the risks are that ponds or tanks in different jurisdictions have leaks. The other risk is in the handling and transportation of the water, either the water coming or the water going. There have been issues in terms of potential groundwater contamination through the spilling of this frac water.
In terms of the system itself, when you're fracking down the pipe, if the pipe is not holding the pressure you stop fracking. It's tested before you frac, and it's a self-checking system, because if the pipe is in a contained system under high pressure when you're pumping down, then when you're coming up at much lower pressure, you know you're not leaking anything through the pipe itself.