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Hydrocarbon Components Mole (%) Methane [CH4] 82.0 - 94.0 Ethane [C2H6] 3.0 - 6.0 Propane [C3H8] 0.1 - 2.0 Butane [C4H10] 0.1 - 0.7 Pentane [C5H12] 0.1 - 0.2 Hexane-plus [C6H14+] 0.0 - 0.2 Inert Nitrogen Gas [N2] < 15.0 Carbon Dioxide [CO2] <10.0 Oxygen [O2] Trace Hydrocarbon Liquids & Water Gas shall be free of any hydrocarbons and water in liquid phase at the delivery point Sulphur [S] < 10 parts per million (ppm) of hydrogen sulphide [H2S] and not more than 15 ppm of total sulphur Gross Heating Value: Not less than (35.39 MJ/scm) FREQUENTLY ASKED QUESTIONS

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Q: What is the composition of CNG?
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