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- By CategoryMixed GasesGas Comp 4PPM HEXANEGas Comp Amount199.8920000 99.9830000 76.5000000 80.4375000 79.1000000 99.9775000 99.9514000 90.8110000 87.0900000 85.5000000 81.0000000 84.7875000 80.4875000 99.7100000 85.4900000 82.4100000 83.5400000 99.9595000Gas Comp 1PPM NITROGEN DIOXIDE OXYGEN ARGON NITROGEN