General Note: The total Market Price of gas for the day references the volume weighted average price at Tennessee Gas Pipeline’s Zone 4 200 Line pool, referred in the SNL Natural Gas Index as the “TGP Z 4 200L”plus all transportation costs to the Company’s City Gate. Prior to May 2016, the reference point was Columbia Gas Transmission’s Appalachian pool or “TCO Pool”. Columbia Gas Transmission’s Appalachian pool, referred in the SNL Natural Gas Index as the “TCO Pool”.