Alex Stege is SCS Engineers’ National Expert on Landfill Gas Modeling. He provides expertise evaluating landfill gas (LFG) to energy and landfill methane emission reduction projects based on the application of LFG models to project LFG recovery. For 20 years, Mr. Stege supported the U.S. EPA’s Landfill Methane Outreach Program (LMOP), World Bank, International Finance Corporation, landfill owners, municipalities and LFG project developers in assessing the feasibility and performance of LFG utilization projects. Mr. Stege leads SCS’s LFG modeling practice, which is based on the scientific application of actual flow and site data to develop an empirically calibrated LFG recovery model. Mr. Stege prepares or reviews domestic and international LFG modeling and due-diligence studies for SCS offices throughout the U.S.
Mr. Stege provides training in LFG modeling to SCS staff at annual meetings, and is responsible for the ongoing development of SCS’s domestic and international LFG models. SCS has the most advanced LFG modeling practice in the industry because Mr. Stege has developed a model calibration procedure, applied SCS’s collection system design and operations expertise and its vast database of LFG flow and site data, and created an empirically-based model which accounts for the effects of collection system coverage/efficiency, site conditions, waste moisture, and waste composition on LFG recovery.
Mr. Stege has been selected to give presentations on the application of LFG models to evaluate landfill methane generation and recovery at conferences hosted by the following organizations: LMOP (numerous conferences); the Global Methane Initiative (GMI) Partnership [Expos in Beijing (2008), Delhi (2010), and Vancouver (2013)]; the Solid Waste Association of North America (SWANA); the Environmental Research and Education Foundation (EREF); the Global Waste Management Symposium; and the International Solid Waste Association (ISWA).
Mr. Stege was the author of LMOP/GMI LFG models for Central and Eastern Europe (2014), Colombia (2010), Ukraine (2009), Mexico (Version 1  and Version 2 ), and Central America (2007), and has provided training on the use of these models. He has served as the Chairman of SWANA’s Generation and Modeling Committee for the past 10 years.
Contact Alex at 602-840-2596 or