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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9285000 79.4940000 99.9825000 74.0000000 99.9870000 98.9320000 80.4875000 83.5400000 99.9960000 99.8375000 99.9899940 99.9800000 83.5420000Gas Comp 1PPM AMMONIA N BUTANE PPM NITROGEN DIOXIDE NITROGEN