The National Research Council held a two-day workshop August 15 and 16 to discuss shale gas development risk challenges. Participants said there is tension between the federal and state governments when it comes to regulating fracking; they advocated for collaboration between the two levels. Some participants pushed for wastewater disposal well regulations. The Center for Sustainable Shale Development unveiled its voluntary standards for Appalachia, which consist of recycling water, double lining wells, and the use of leak detection equipment.