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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9615000 77.3200000 99.9865000 87.9890000 66.0000000 99.8200000 79.1000000 99.9514000 83.5400000 90.8110000 99.9775000 95.4725000 78.9000000 90.4000000 80.5000000 99.9880000 99.9991805Gas Comp 1NITROGEN OXYGEN PPM NITROGEN DIOXIDE ARGON