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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9615000 87.0900000 99.9932000 99.9965900 97.9600000 99.4000000 79.5000000 99.6400000 94.5000000 99.8920000 87.0925000 43.0000000 79.7600000 99.5000000 30.0000000 99.9937000 25.0000000 99.9799000 4.0000000 83.8950000 81.9470000Gas Comp 1PPM HYDROGEN SULFIDE PPM NITROGEN DIOXIDE OXYGEN ARGON NITROGEN