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- By CategoryMixed GasesGas Comp 3PPM HYDROGEN SULFIDEGas Comp Amount199.8200000 99.9991805 99.7200000 99.9670000 99.9739500 99.9922000 83.5400000 79.1400000 95.9982000 82.4940000 50.0000000 99.9860000Gas Comp 1PPM NITROGEN DIOXIDE NITROGEN HELIUM 3 PPM AMMONIA