See below for the matches found OXYGEN (0.0015-19.49%), METHANE (0.0005-2.5%), CARBON, 50018/4594942     CALGAZ 12/19/2017 OXYGEN (0.0015-23.5%), METHANE (0.0005-2.5%), CARBON MONOXIDE (0., 50018/4594942     CALGAZ 3/12/2015