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- By CategoryMixed GasesGas Comp Amount40.3500000Gas Comp Amount192.7820000 81.6400000 99.9800000 2.5000000 99.9000000 96.0000000 99.9615000 99.9749500 84.7875000 99.9175000 79.4900000 40.0000000 99.9715000 81.9770000 90.0000000Gas Comp 1PPM CARBON MONOXIDE NITROGEN METHANE ETHANE