In response to identified data gaps in the comprehensive review, several methods with promise will be selected for further evaluation and testing in laboratory and pilot plant settings with relevant amine solvents. A project plan will be created that outlines tests of interest, which could include laboratory evaluation of certain methodological questions or calibrations in advance of application at pilot plant stacks, direct comparison of measurements from several methods (and several repeated applications of the same method) at the same pilot plant site to inform method precision, the potential impacts on method performance as a result of the presence of emissions control devices such as water or acid washes or demisters, and the like.