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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9739500 99.9922000 81.9100000 99.9991805 79.1400000 83.5400000 82.4940000 95.9982000 99.7200000 99.9670000 50.0000000Gas Comp 1HELIUM 3 PPM AMMONIA NITROGEN PPM NITROGEN DIOXIDE