Description COMPONENTS CONCENTRATION NITROGEN 1.50% CARBON DIOXIDE - - METHANE BALANCE ETHANE 2.50% PROPANE 2.50% ISO-BUTANE 0.50% N-BUTANE 2.00% NEOPENTANE - - ISO-PENTANE 0.30% N-PENTANE 0.50% HEXANE 0.20% HEPTANE - -