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- By CategoryMixed GasesGas Comp Amount20.4000000Gas Comp Amount199.9899940 99.9880000 99.9948400 99.9739500 90.3990000 50.0000000 92.7820000 53.7860000 66.0000000 79.6000000Gas Comp 1PPM AMMONIA PPM NITROGEN DIOXIDE HELIUM 3 NITROGEN