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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9285000 87.0925000 83.5400000 88.5000000 81.8785000 99.9922000 99.9999500 99.9899880 99.9739500 79.7600000 80.4890000 79.0000000 99.8650000 79.5000000 99.9715000Gas Comp 1PPM CARBON DIOXIDE N BUTANE PPM OXYGEN NITROGEN NITROGEN