For the last decade the U.S. Environmental Protection Agency (EPA) has required mandatory annual reporting of GHG emissions using the Greenhouse Gas Reporting Program (GHGRP), 8 which relies on activity-based or BU inventory methods. Policy making decisions frequently hinge on these reported inventory estimates. Recent regulations are shifting to require empirical data at facilities. In 2022, the EPA proposed the incorporation of empirical data to improve the accuracy of inventories, recognizing the advancements in TD technologies for reliable methane emission monitoring and quantication. 10 Various measurement methods have been developed to assess emissions using remote sensing (TD) techniques, including drones, manned aircraft, and satellite technologies. These methods are often contracted to conduct emission assessments at facilities, providing a comprehensive "snapshot" of whole-facility emissions. In the past, there existed no direct means to validate the accuracy of the BU inventory methodology. Recently, it is widely recognized that the traditional BU inventories often underestimate emissions relative to the TD methods.