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Ms. Walch is a Project Professional for our Tracer division. She has a Masters Degree in Geological Sciences from the University of Southern California.

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    • Ms. Walch is a Project Professional for our Tracer division. She has a Masters Degree in Geological Sciences from the University of Southern California.

Mr. Walker is a Project Professional in our Charlotte, North Carolina, office.

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    • Mr. Walker is a Project Professional in our Charlotte, North Carolina, office.

Jim Walsh, PE, BCEE, is the President and CEO of SCS Engineers, and one of our National Experts on Elevated Temperature Landfills. He has worked at the forefront of sustainable solid waste management, sanitary landfills, and landfill gas (LFG) for more than 40 years. Mr. Walsh regularly serves as a Project Director and Reviewing Principal for SCS landfill and LFG projects. His project experience, coupled with his involvement in professional and industrial associations, has earned Mr. Walsh an international reputation in these specialty fields. He has authored numerous publications and technical support documents and presents regularly at environmental conferences.

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    • Jim Walsh, PE, BCEE, is the President and CEO of SCS Engineers, and one of our National Experts on Elevated Temperature Landfills. He has worked at the forefront of sustainable solid waste management, sanitary landfills, and landfill gas (LFG) for more than 40 years. Mr. Walsh regularly serves as a Project Director and Reviewing Principal for SCS landfill and LFG projects. His project experience, coupled with his involvement in professional and industrial associations, has earned Mr. Walsh an international reputation in these specialty fields. He has authored numerous publications and technical support documents and presents regularly at environmental conferences.
      Practice Areas Have Included:
      Leadership in Landfill Engineering. Over 40 years of professional experience on landfill projects. He served as Project Manager and primary author of the U.S. EPA landfill manual. He served as Project Manager and Chief Investigator on several U.S. EPA landfill R&D efforts relating to leachate, gas, and liner/cap performance. He has been engaged on over 100 landfill design and permitting projects, including sites with double composite liner systems. He has managed or directed several successful greenfield and landfill expansion permits with individual design capacities in excess of 25 million tons of solid waste.
      Leadership in Landfill Gas. Over 40 years of professional experience on landfill gas (LFG) projects. Past Director of the leading LFG professional organization, the SWANA Landfill Gas Division. Received top award in landfill gas practice, the SWANA Landfill Gas Distinguished Service Award in 1997. He has served as Principal Investigator multiple landfill gas R&D projects for U.S. EPA, U.S. DOE, and Gas Research Institute. He has authored numerous publications and technical support documents in LFG. He has presented dozens of times on LFG at environmental conferences. He has been engaged as chief design engineer, Principal Investigator, or Project Manager on over 300 landfill gas projects over the years. Landfill gas related subjects have included gas migration and control, energy recovery, odor management, and compliance with air and solid waste rules including CAA, NSPS, Title V, NSR, PSD, NESHAP, and Subtitle D.
      Leadership on Landfill Fire and Elevated Temperature Landfills. Principal investigator or chief engineer on over thirty dedicated landfill fire and elevated temperature landfill projects. He has provided guidance to landfill operators to avoid landfill fires. He has investigated landfill fires in-situ, and developed management and mitigation programs to address landfill fires and related events when they do occur. He has presented at environmental conferences on the subject of landfill fires. He served on the Ohio EPA Committee formed to address landfill fires and elevated temperature landfills in the state, and assisted in the development of the Ohio EPA Guidance Document on the subject.
      Contact Jim at 513-421-5353 or

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Mr. Warren is a Project Manager with experience in production management, landfill engineering, and mine planning.

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    • Mr. Warren is a Project Manager with experience in production management, landfill engineering, and mine planning.

Ms. Watkins is a Project Professional with 5 years of experience in environmental remediation and compliance. She is responsible for Phase I and II Environmental Site Assessments (ESAs), multimedia sampling and reporting (soil, groundwater, surface water, sediment, soil vapor, air), as well as compliance monitoring, permitting, document preparation, and proposals. She works directly with our local clients and regulatory agencies, ensuring timeliness of reports and compliance.

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    • Ms. Watkins is a Project Professional with 5 years of experience in environmental remediation and compliance. She is responsible for Phase I and II Environmental Site Assessments (ESAs), multimedia sampling and reporting (soil, groundwater, surface water, sediment, soil vapor, air), as well as compliance monitoring, permitting, document preparation, and proposals. She works directly with our local clients and regulatory agencies, ensuring timeliness of reports and compliance.
      Ms. Watkins’ previous experience includes field investigations and report production involving groundwater monitoring, perfluorooctanoic acid (PFAS) sample collection, excavation events related to South Coast Air Quality Management District (SCAQMD) Rule 1466 monitoring, preparation of sampling plans for Phase II investigations, stormwater inspections and reporting, and related field activities. She has developed a conceptual site model to request closure for a service station site, and has overseen contractors in a variety of field activities, including Organochlorine pesticides (OCP) testing in school sites, aerially deposited lead surveys, and soil vapor monitoring. She has conducted site investigations related to federal and state hazardous waste; produced reports for review by oversight agencies such as the Regional Water Quality Control Board (RWQCB), CalTrans, and California Department of Toxic Substances Control (DTSC); prepared Phase I ESA reports; and logged and sampled soil using boring techniques that included sonic drilling, hand auger, and direct push equipment. She has also overseen Phase II projects, and coordinated the installation and abandonment of wells, including obtaining permits, contact with subcontractors, and field oversight. She also has expertise in soil vapor well installation and monitoring.

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Mr. Weaver has 21 years of experience in groundwater and stormwater sampling, and maintenance and repair of related equipment. In addition to sampling from soil and soil vapor extraction wells, he is experienced in the maintenance and repair of soil vapor extraction (SVE) systems, and monitoring groundwater and stormwater systems. He is also trained to operate and calibrate air and water monitoring equipment, including RAE PIDs, Foxboro FIDs, GEM landfill gas (LFG) detectors, RKI Eagle gas detectors, and Horiba and water quality meters (QED) and pumps.

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    • Mr. Weaver has 21 years of experience in groundwater and stormwater sampling, and maintenance and repair of related equipment. In addition to sampling from soil and soil vapor extraction wells, he is experienced in the maintenance and repair of soil vapor extraction (SVE) systems, and monitoring groundwater and stormwater systems. He is also trained to operate and calibrate air and water monitoring equipment, including RAE PIDs, Foxboro FIDs, GEM landfill gas (LFG) detectors, RKI Eagle gas detectors, and Horiba and water quality meters (QED) and pumps.
      He is experienced in Global Information System (GIS) mapping, source collection, database management, and digital and manual drafting. His software experience includes AutoCAD, ARC/INFO, ARC/VIEW GIS, Windows 7 Professional, and UNIX.

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Mr. Weber’s main area of concentration is risk analysis.He is responsible for the documentation of Process Safety Management Programs (PSM), Risk Management Programs (RMP), and California Accidental Release Prevention (CalARP) Programs for facilities using regulated substances. This work includes preparing all necessary documentation for compliance with the PSM/RMP/CalARP regulation, and modeling the potential off-site consequences of potential releases, compliance audits, and other environmental study projects for municipal and private clients.

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    • Mr. Weber’s main area of concentration is risk analysis.He is responsible for the documentation of Process Safety Management Programs (PSM), Risk Management Programs (RMP), and California Accidental Release Prevention (CalARP) Programs for facilities using regulated substances. This work includes preparing all necessary documentation for compliance with the PSM/RMP/CalARP regulation, and modeling the potential off-site consequences of potential releases, compliance audits, and other environmental study projects for municipal and private clients.
      Prior to joining SCS Engineers, Mr. Weber acquired experience in the oil and gas industry while working for an oil company in Pennsylvania. He implemented his knowledge of ESRI Geographic Information Systems to develop maps for project planning, legal correspondence, and engineering operations. He was also involved in the facilitation of permits, as well as correspondence with state and federal environmental protection agencies.

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Ms. Welch is a Vice President/Project Director at SCS’s Overland Park, Kansas office. She has a background in civil engineering, which she applies to solid waste related projects in numerous states for municipal and private clients.

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    • Ms. Welch is a Vice President/Project Director at SCS’s Overland Park, Kansas office. She has a background in civil engineering, which she applies to solid waste related projects in numerous states for municipal and private clients. Throughout her career, she has worked on solid waste projects, including groundwater monitoring, landfill design and permitting, construction oversight, air compliance issues, bioreactor studies, and alternative cover design. Although based in the Central U.S., as a solid waste practice lead Ms. Welch leverages experience and SCS personnel from across the company to meet clients’ expectations and needs.

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Ms. Wessels is a Project Director with the Landfill Engineering Group in the Reading, PA office. She has over two decades of experience in the waste management industry and environmental consulting, including landfill design, project management, regulatory compliance, permitting, environmental monitoring and studies, auditing, and budgeting.

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    • Ms. Wessels is a Project Director with the Landfill Engineering Group in the Reading, PA office. She has over two decades of experience in the waste management industry and environmental consulting, including landfill design, project management, regulatory compliance, permitting, environmental monitoring and studies, auditing, and budgeting.

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Ms. Whitmer is an Environmental Scientist and Project Manager with SCS Engineers. She has over seventeen years of experience in environmental consulting. Project experience includes site assessments, extent of contamination studies, landfill flare and gas monitoring systems, groundwater sampling and statistical analysis of groundwater data, regulatory compliance, and NPDES services.

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    • Ms. Whitmer is an Environmental Scientist and Project Manager with SCS Engineers. She has over seventeen years of experience in environmental consulting. Project experience includes site assessments, extent of contamination studies, landfill flare and gas monitoring systems, groundwater sampling and statistical analysis of groundwater data, regulatory compliance, and NPDES services.
      Ms. Whitmer has worked with several solid waste disposal facilities in Arkansas to help bring the Landfills into compliance with applicable Federal and State solid waste regulations. In particular, she has prepared several groundwater sampling and analysis plans, statistical and contingency plans, and explosive gas monitoring plans for several landfill sites.
      Ms. Whitmer also has extensive experience in managing groundwater sampling, statistics utilizing Sanitas for GroundwaterTM and DumpstatTM statistical programs, reporting, and compliance associated with solid and hazardous waste landfills. In addition, she has performed many geologic, hydrogeologic, and compliance projects associated with solid and hazardous waste landfills.

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Ms. Wilkinson is a Vice President and Project Manager at SCS with over 20 years of experience in landfill engineering design, landfill gas (LFG), permitting, civil and environmental engineering, financial feasibility evaluations, storm water design, and construction quality assurance at landfills and solid waste facilities. Ms. Wilkinson also has experience working on foundation and structural design teams for various facilities, and she is proficient in the computerized analysis of engineering designs.

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Mr. Wilks is a Vice President and Regional O&M Manager for the O&M Office, located in Bedford, TX. He is also one of SCS’s National Experts on Liquids Management. His technical expertise is environmental compliance relating to landfills.

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    • Ron Wilks is a Vice President and Regional O&M Manager in Bedford, TX. He is also one of SCS’s National Experts on Liquids Management. He has a degree in business administration (marketing and personnel management) and has over four decades of experience. His technical expertise is environmental compliance relating to landfills. He is responsible for training personnel in the Field Services Southwest and Southeast Regions, and he is active with the SWANA LFG Training and Field Practices Committee. Mr. Wilks is a client services manager for all aspects of projects the include design requirements, coordination of designs, construction implementation, and operations management. He is also the primary system troubleshooter and investigator for LFG and leachate management systems.
      Contact Ron at 817-358-6104 or

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Mr. Williams has over 8 years of experience working in the landfill industry, on multiple landfills across the Gulf Coast Region. Mr. Williams is proficient in landfill gas operations and maintenance, flare trouble shooting and heavy equipment operation, as well as, managing multiple sites and crews to handle all Landfill Operation and Maintenance activities. Mr. Williams has over 18 years combined experience in residential, commercial, military and environmental construction fields.

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    • Mr. Williams has over 8 years of experience working in the landfill industry, on multiple landfills across the Gulf Coast Region. Mr. Williams is proficient in landfill gas operations and maintenance, flare trouble shooting and heavy equipment operation, as well as, managing multiple sites and crews to handle all Landfill Operation and Maintenance activities. Mr. Williams has over 18 years combined experience in residential, commercial, military and environmental construction fields.
      Mr. Williams leads the Operation and Maintenance Services for multiple Republic Services sites, including Sand Valley, Pineview, Colonial, Timberlands, Little Dixie, Willow Ridge, Big River and Chilton county landfills. Work included all aspects of Landfill Gas O&M; Compliance monitoring, wellfield tuning, Flare Maintenance & Repair, Pump Maintenance, GCCS investigations, GCCS repair, and GCCS Construction.

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Mr. Wisniewski is a geologist with over 17 years of professional experience in the environmental, geologic, and geomorphic consulting fields.

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    • Mr. Wisniewski is a geologist with over 17 years of professional experience in the environmental, geologic, and geomorphic consulting fields. He has participated in projects involving Phase I and Phase II Environmental Site Assessments (ESAs), soil vapor and indoor air quality investigations, soil and groundwater investigations, environmental remediation for underground storage tanks (USTs), Brownfields and dry cleaner sites, groundwater monitoring programs, biosolids disposal, wastewater sites, geotechnical investigations for civil engineering projects, watershed and stream channel assessments, geomorphic investigations, and geologic hazard evaluations.

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Mr. Woloszyn is a Project Professional with SCS Engineers and is based in the Harrisburg, Pennsylvania office. Since joining with SCS in 2017, has reviewed contract submittals for approval, assisted with report documentation for NSPS reports to the EPA, prepared design plans for landfill gas collection and leachate force main systems, conducted aerial UAS topography scans, UAS 3D modeling, and has provided construction quality assurance for of gas extraction wells with related conveyance piping systems as well as engineered final cover systems.

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    • Mr. Woloszyn is a Project Professional with SCS Engineers and is based in the Harrisburg, Pennsylvania office. Since joining with SCS in 2017, has reviewed contract submittals for approval, assisted with report documentation for NSPS reports to the EPA, prepared design plans for landfill gas collection and leachate force main systems, conducted aerial UAS topography scans, UAS 3D modeling, and has provided construction quality assurance for of gas extraction wells with related conveyance piping systems as well as engineered final cover systems.

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Mr. Wu brings over two decades of construction management and leadership experience. He has a comprehensive background working in construction, architecture, and business. Mr. Wu has organized, coordinated and managed residential and commercial construction projects in Taiwan, China, and the United States. He is fluent in English, Mandarin, Taiwanese, and Shanghainese.

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    • Mr. Wu brings over two decades of construction management and leadership experience. He has a comprehensive background working in construction, architecture, and business. Mr. Wu has organized, coordinated and managed residential and commercial construction projects in Taiwan, China, and the United States. He is fluent in English, Mandarin, Taiwanese, and Shanghainese.