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- By CategoryMixed GasesGas Comp 3PPM ISOBUTANEGas Comp Amount199.9948400 99.9899940 99.8920000 99.9860000 99.9750000 99.9983000 78.5000000 80.4375000 81.9820000 83.0000000 99.9595000 99.9775000 64.6000000 91.0000000 50.0000000 99.9999990 99.9200000 95.0000000 99.9685000 99.9825000 99.8960000Gas Comp 1PROPANE TUNGSTEN HEXAFLUORIDE PPM CARBONYL SULFIDE NITROUS OXIDE NITROGEN