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- By CategoryMixed GasesGas Comp Amount421.0000000Gas Comp Amount299.7700000 99.9977500 99.9200000 99.9935000 81.9375000 0.3000000 99.9999500 96.5000000 82.9820000 86.5000000 88.5000000 99.9983000 61.0000000 99.9550000 99.9975000 79.0000000Gas Comp 2METHANE CARBON MONOXIDE 18 NITRIC OXIDE AMMONIA NITROGEN R134A TETRAFLUOROETHANE PPM ETHANOL