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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount197.9000000 99.9997500 95.9910000 99.9370000 99.8860000 99.7030000 81.0000000 78.5375000 99.9550000 79.4780000 77.4550000 99.9870000 15.0000000 55.0000000 83.5400000 77.6000000 99.9940000Gas Comp 1PPM HYDROGEN CHLORIDE ARGON HELIUM NITROGEN