I think there are two answers.
One is the general answer, which is that whatever assessment or mitigation we come up with will have to get past Mr. Binder's agency. We'll have to make the safety case and will have to satisfy him and all the stakeholders.
The specific answer is that at the depths of embedment we're talking about, this isn't the same type of issue. Once you get down to 100 or 150 feet, you don't have the same challenges as in the top 10 to 20 feet of subsoil.