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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9932000 81.0420000 83.5400000 90.8110000 80.2000000 89.1850000 87.0000000 99.9992000 99.9999990 99.9499500 95.4964000 99.9799000 99.7885000Gas Comp 1NITROGEN DIOXIDE PPM CARBON DIOXIDE NITROGEN NITROGEN