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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9685000 90.8110000 99.9972000 78.9000000 5.0000000 99.9500000 77.0000000 99.9909000 97.9600000 99.7100000 31.4000000 78.9920000 83.5400000Gas Comp 1NITROGEN DIOXIDE NITROGEN NITROGEN PPM CARBON DIOXIDE