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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9965900 99.9749500 69.6000000 99.8773500 99.9860000 80.4375000 99.9899940 87.3865000 83.5400000 82.4940000 82.4920000Gas Comp 1PPM CARBON DIOXIDE NITROGEN DIOXIDE NITROGEN NITROGEN