Associated Press: As the cleanup of Tennessee Valley Authority’s Kingston ash spill continues, the Environmental Protection Agency has suggested ways to move forward and what it could cost, but a key question remains unanswered. The federal EPA is still trying to decide if coal ash should be reclassified as a hazardous material — a step that would likely make disposal more expensive and affect TVA rate payers. EPA headquarters spokeswoman Latisha Petteway said the environmental agency doesn’t …