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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9595000 83.5400000 99.9730000 85.5000000 99.9972500 99.9999250 99.9965000 99.9994000 53.7860000 99.9739500 99.9991000 99.5000000Gas Comp 1NITROGEN DIOXIDE NITROGEN PPM CARBON DIOXIDE NITROGEN