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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount177.9820000 99.9750000 93.2000000 99.9987500 99.9865000 99.9998000 81.9973000 99.9992000 99.9200000 99.9825000 83.5400000 82.4100000 99.9925000 99.9020000 99.9973000 95.4964000Gas Comp 1PPM CARBON DIOXIDE NITROGEN NITROGEN DIOXIDE NITROGEN