10 Over or under estimation of emissions by 10s to 100s of kg/h dierence seen multiple times in this analysis would result in substantial errors in quantication, and given methane fees of 1500 USD per tonne methane (CH 4 ), signicant nancial impact for individual facilities and their operators. Sim- ilarly, the European Union (E.U.) is considering methane emissions rules covering operators within the E.U., and also additional reporting requirements on emissions data for importers of natural gas and liquied natural gas (LNG) from the exporting suppliers. Voluntary programs do not address these inter-measurement technology considerations presented in this work.