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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9987500 93.2000000 83.5400000 99.9973000 99.9020000 81.9973000 99.9750000 99.9925000 99.9200000 99.9998000 95.4964000 99.9825000 99.9865000 99.9992000 82.4100000Gas Comp 1NITROGEN NITROGEN DIOXIDE NITROGEN PPM CARBON DIOXIDE