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- By CategoryMixed GasesGas Comp Amount512.0000000Gas Comp Amount199.9920000 99.9899880 85.4900000 4.0000000 99.9820000 79.6000000 99.9750000 83.8950000 99.9730000 99.9986500 87.0900000 43.0000000 99.8650000 99.9900000 22.5000000Gas Comp 1PPM NITROGEN DIOXIDE OXYGEN NITROGEN ARGON