The importance of combined performance and environmental modeling is increasing as NextGen concepts become more sophisticated and analysis demands increase. Currently, advanced concepts of operation are typically evaluated using deterministic performance modeling. Efforts to investigate the environmental effects of these concepts are limited, even though environmental modeling tools that can investigate the current National Airspace System (NAS) do exist. IAI has been awarded a follow-on contract to develop an Integrated Testbed for Environmental Analysis of NextGen Concepts using the Airspace Concepts Evaluation System (ACES). IAI will extend its ongoing efforts to merge performance and environmental modeling tools, allowing a complete investigation of new concepts. The utility of a seamless connection between performance software, specifically ACES, and a Volpe-developed validated environmental model, the Aircraft Environment Design Tool (AEDT), will be demonstrated. The feasibility of this approach has already been demonstrated in the first phase of this work, and the utility of the approach is being investigated through several sample analyses in the second phase of the work. The current project will undertake two additional combined performance and environmental analyses in the areas of Flight Deck Merging and Spacing (FDMS) and System Oriented Runway Management (SORM), a concept under development by NASA. The results will be verified and validated through discussions with subject matter experts and NASA personnel and comparisons with similar analyses, enhancing the utility and marketability of the product to both government and commercial customers.