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- By CategoryMixed GasesGas Comp Amount299.9950000Gas Comp Amount199.9972500 99.9739500 99.6710000 89.0000000 99.9948400 50.0000000 86.0000000 98.0000000 99.7100000 99.9000000Gas Comp 1NITROGEN HELIUM 3 PPM NITROGEN DIOXIDE PPM AMMONIA