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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9285000 79.9875000 99.9997500 99.9999500 99.9739500 99.9989000 40.0000000 95.9700000 83.5400000 79.9193000 99.9994000Gas Comp 1PPM CARBON DIOXIDE N BUTANE NITROGEN NITROGEN PPM OXYGEN