Albany, New York Sheriff Craig Apple assured a room of concerned citizens that county emergency crews were prepared to handle an oil-train accident involving three or four tank cars. Firefighters have been training to combat railcar fires with foam, and evacuation plans are detailed in a 500-page emergency response plan, Apple told residents in a May 12 address. But he was blunt about the potential impact of a larger derailment: "Look, let's face it, there's going to be mayhem." Albany's tracks handle as much as a fourth of the oil pumped from North Dakota's booming Bakken Shale, or up to several 100-car trains per day, each carrying 70,000 barrels. It is one of several spots along North America's new oil-by-rail corridors where residents and officials are restless, following six fiery derailments in the past 10 months. Some want to limit or halt the traffic, fearful that existing precautions will not prevent deadly blasts, air and waterway pollution