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- By CategoryMixed GasesGas Comp Amount320.0000000Gas Comp Amount199.9670000 99.9899940 95.9982000 50.0000000 300.0000000 99.9739500 83.5400000 99.9991805 77.6000000 99.9998800Gas Comp 1PPM NITROGEN DIOXIDE PPM AMMONIA HELIUM 3 NITROGEN