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- By CategoryMixed GasesGas Comp 5METHANEGas Comp Amount193.8140000 99.9980000 89.4900000 86.8000000 81.0000000 99.9200000 83.5400000 77.6000000 99.9500000 77.3200000 99.9870000Gas Comp 1PPM FORMALDEHYDE HELIUM NITROGEN ETHYLENE NITROGEN