The proposed MII method compares existing inventory reporting to in-field observations, and then augments the inventory results to construct a complete inventory of emissions, Figure . Since comparisons are done at the level of a facility, the method must maintain differentiation between facilities to account for In step (A), the analyst typically uses prototypical site models (defined in sections 2.4 and S-6) to replicate 140 inventory reports. While MAES outputs are stochastic, annualized results can be directly compared to annual reports, assuring that the initial MAES model represents inventory reporting. MAES replication of inventory reports often identifies issues with inventory reporting, which is useful to operators, who can update their inventory process, and to regulators, who can improve reporting requirements or instructions for reporting. To further describe the proposed modeling approach, we first introduce the two data sets utilized in the study: state regulatory reporting used to model the DJ basin in Colorado, followed by a description of the TD data set, represented by aerial data from the Colorado Coordinated Campaign (C3) project .