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- By CategoryMixed GasesGas Comp Amount40.3500000Gas Comp Amount190.4000000 78.9400000 90.8110000 80.4890000 99.9860000 79.4875000 77.8950000 87.0925000 99.9725000 99.7030000 99.9985000 50.0000000 81.6400000 98.0000000 99.8647000Gas Comp 1AIR PPM METHANE NITROUS OXIDE NITROGEN PPM AMMONIA