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- By CategoryMixed GasesGas Comp Amount299.9950000Gas Comp Amount199.9987500 99.9739500 99.9750000 99.9999500 99.9948400 84.0325000 99.9999000 99.9000000 99.9910000 60.0000000 50.0000000 99.7900000Gas Comp 1NITROGEN HELIUM 3 PPM NITROGEN DIOXIDE PPM AMMONIA