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- By CategoryMixed GasesGas Comp Amount252.1000000Gas Comp Amount179.1000000 99.9820000 99.9499500 99.9947900 99.9000000 92.0000000 93.8450000 99.9994300 81.0420000 99.6710000 99.9909000 99.9856000Gas Comp 1N BUTANE NITROGEN PROPANE PPM METHANE