SCS professionals are active in, and leaders of industry and professional associations. We organize and participate in workshops and conferences, author and present technical papers, conduct research, and participate in national and state-level legislative and rule-making processes and regulatory policy. Our engineers, environmental consultants, and scientists work in close coordination on environmental solutions.
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.
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 AStege@scsengineers.com
Mr. Sullivan, BCES, CPP, REPA, is a Senior Vice President of SCS Engineers and Business Unit Director of the Southwest Region. He is also our National Expert on the Landfill Clean Air Act and the New Source Performance Standard (NSPS). Mr. Sullivan has over 25 years of environmental engineering experience, specializing in solid waste-related issues.
He has worked closely with regulatory agencies on the federal, state and local level. His expertise has been developed managing large-scale contracts, programs, and projects on a state and national level. His management experience includes managing professional and field staff and all aspects of operational performance, customer service, and project management. He has an extensive knowledge of regulatory permitting and compliance. His Real Estate training has been pivotal in large scale property acquisitions, divestitures, and development in the oil and gas and renewable energy sectors.
Mr. Sullivan, BCES, CPP, REPA, is a Senior Vice President of SCS Engineers and Business Unit Director of the Southwest Region. He is also our National Expert on the Landfill Clean Air Act and the New Source Performance Standard (NSPS).
Mr. Sullivan has over 25 years of experience in the area of environmental engineering, specializing in solid waste management and other environmental issues. He is the Managing Director of SCS Engineers (SCS) consulting and engineering operations within the Southwestern United States, the largest of all of SCS’s engineering business units. He also serves as the Practice Leader for SCS’s Solid Waste Practice in the same region. Mr. Sullivan is the National Expert for SCS’s companywide Air Quality program. He also oversees SCS’s company-wide GHG and Risk Assessment programs and is one of the national experts on risk assessment and toxic exposure issues for solid waste facilities.Mr. Sullivan is a company Senior Vice President and Member of the Company’s Management Advisory Committee.
Mr. Sullivan is also Principal-in-Charge for projects related to solid waste facility investigation and risk assessment, redevelopment, LFG engineering, air quality permitting and compliance, GHG emissions, and groundwater investigations at solid waste and other industrial facilities, as well as related engineering services. He has published and/or presented over 100 technical papers in industry journals, publications, conferences, seminar, and workshops.
Contact Pat at 916-361-1297 or PSullivan@scsengineers.com
Mr. Paul Schafer is a Vice President and Project Director at SCS Engineers and our National Expert on Ambient Air Monitoring. During his technical career at SCS and SCS Tracer Environmental, Mr. Schafer has assumed key roles on several nationally significant monitoring efforts.
Mr. Paul Schafer is a Vice President and Project Director at SCS Engineers, and our National Expert on Ambient Air Monitoring. During his technical career at SCS and SCS Tracer Environmental, Mr. Schafer has assumed key roles on several nationally significant monitoring efforts. He has in-depth experience interfacing with regulatory agencies regarding the performance of monitoring systems, source emission tests, and continuous process monitors which are operated for our clientele. He has had direct working experience with the San Luis Obispo County APCD, San Joaquin Valley APCD, Imperial County APCD, South Coast AQMD, Santa Barbara APCD, San Diego County APCD, California Air Resources Board, EPA Region IX, and the General Services Administration regarding monitoring programs and air quality impact assessments. He is also experienced in liquids management.
Mr. Schafer offers decisive management skills, which contribute to the success of monitoring programs under his purview. Cost control management and defensible technical performance are primary goals integral to all of the long-term monitoring programs that he manages. Mr. Schafer has developed close business relationships with manufacturers and vendors in the ambient air quality monitoring field.
Contact Paul at 619-823-5333 or PSchafer@scsengineers.com
Mr. Sim is a Vice President and one of SCS’s National Experts for Liquids Management; he is also O&M Region Manager for the western counties in California. He is responsible for the following counties: LA County, Kern County, Ventura County, San Luis Obispo County, and Santa Barbara County.
Mr. Sim is a Vice President and one of SCS’s National Experts for Liquids Management; he is also O&M Region Manager for the western counties in California. He is responsible for the following counties: LA County, Kern County, Ventura County, San Luis Obispo County, and Santa Barbara County. He has over 10 years of engineering-related experience with Waste Management, Inc. (WM), and more recently with SCS Engineers (SCS). He has a strong background in construction and field operations, having served as superintendent of a family-owned construction company for several years. With WM, he managed the design and construction of landfill liner cells, landfill final cover systems, landfill gas (LFG) flare stations, and numerous LFG well and piping projects. He also assisted with permitting efforts for landfill expansions, has managed environmental and safety compliance at multiple WM sites in Southern California, and managed LFG operations, including 10 LFG technicians, across nine WM sites in Southern California and Hawaii. He is an expert in Zink Ultra-Low Emission and traditional enclosed flare operations, and has significant experience in hydrogen sulfide (H2S) treatment system design and operation. He has designed gas collection and control system (GCCS) 5-year and final closure build-out plans, with respect to site LFG generation rates and operational fill sequence, and has improved surface emissions and probe compliance at all WM landfills in Southern California. Mr. Sim has facilitated and taught WM’s Landfill Gas Technician Program, and conducted numerous in-house training programs for WM employees.
Since joining SCS, Mr. Sim continues to be involved in permitting, design, construction, and operations and maintenance of LFG systems across the country. Mr. Sim is currently the project manager and engineer of record responsible for the operations and maintenance (O&M) of the Chiquita Canyon Landfill GCCS system. Chiquita Canyon Landfill has over 300 collection points, two LFG turbines, and two flares with condensate injection systems. In addition to his involvement in O&M projects Mr. Sim has also been involved in many GCCS design and construction projects across California, Oregon and Alaska since joining SCS. These projects include landfill final cover systems, flare installations, hydrogen sulfide treatment systems, condensate injection systems, and numerous landfill gas well installations.
Contact Sol at 562-492-6222 SSim@scsengineers.com