Natural Gas Measurement
Compressed natural gas (CNG) and liquefied natural gas (LNG) used for transportation must be measured in gasoline gallon equivalents (GGE) or diesel gallon equivalents (DGE). One DGE of LNG is the equivalent of one gallon of motor fuel. One GGE of CNG is equal to 139.31 cubic feet or 6.38 pounds.
(Reference Ohio Revised Code 5735.011)