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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount189.1850000 99.9909000 79.1000000 99.9000000 93.2000000 99.9999250 95.9910000 99.9848000 88.7500000 99.9832000 83.5400000 99.9739500 76.9890000 65.0000000 69.6000000 95.4725000 81.9910000Gas Comp 1NITROGEN NITROGEN DIOXIDE N BUTANE ETHYLENE