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- By CategoryMixed GasesGas Comp 4OXYGENGas Comp Amount199.9875000 79.9875000 81.9910000 98.9900000 99.8647000 99.9890000 66.0000000 99.9917500 81.9470000 81.6400000Gas Comp 1NITROGEN R218 OCTAFLUOROPROPANE PPM ETHYLENE PPM HYDROGEN SULFIDE