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- By CategoryMixed GasesGas Comp Amount20.5000000Gas Comp Amount176.5000000 99.9917500 99.9810000 99.9999500 50.0000000 74.7000000 99.9685000 78.5375000 81.8470000 86.0000000 81.9100000Gas Comp 1PPM CARBON DIOXIDE PPM OXYGEN N BUTANE PPM METHANE NITROGEN NITROGEN