 A common concern by the general public is the potential for hydraulic fracturing to impact drinking water supplies. Is there really significant concern to be had there? The answer is yes and no. First let me say that there is a significant chance for contamination to occur and that occurs because of surface spills. And agencies like the Department of Environmental Protection in Pennsylvania work very hard with the operators to mitigate and prevent surface spills. And the reason for surface spills being an issue is that water typically flows downhill, downward into the ground. So then the second half of the question of course is will water down two kilometers below the surface of the earth flow upward from the hydraulic fracture treatment and contaminate groundwater? It's very important to appreciate that water does not flow uphill and is very unlikely to contaminate groundwater from below. And this is the reason why the Pennsylvania Department of Environmental Protection spends so much time working with the operators to prevent those surface spills. They're the ones that can potentially contaminate groundwater, not water coming from below flowing uphill. Water doesn't do that.