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- By CategoryMixed GasesGas Comp Amount299.9950000Gas Comp Amount199.0000000 50.0000000 99.9925000 99.9999250 99.9791600 99.9739500 95.9982000 99.7885000 99.6000000 99.9986500 88.8240000Gas Comp 1PPM NITROGEN DIOXIDE PPM AMMONIA HELIUM 3 NITROGEN