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Ms. VanDussen has extensive background in environmental engineering. She has experience in solid waste regulatory compliance and management, Clean Air Act permitting, environmental data analysis and management, assessment and remediation, projects cost management and finance.

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    • Ms. VanDussen has extensive background in environmental engineering. She has experience in solid waste regulatory compliance and management, Clean Air Act permitting, environmental data analysis and management, assessment and remediation, projects cost management and finance. Ms. VanDussen has performed air quality services, including preparation of permit applications, evaluation of permitting requirements and exemptions, performance of compliance assessments, preparation of emission inventories, annual compliance certifications, and semiannual reports. Ms. VanDussen performed air dispersion modeling using AERMOD View software by applying applicable state modeling requirements. Her practice encompasses environmental compliance and reporting for small and Title V, both publicly and privately owned landfills.

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Mr. VanGennip has worked on various solid waste projects as a project manager.  He has over 30 years of experience in design, permitting, and construction of solid waste facilities, water distribution systems, sewer collection systems, subdivisions, commercial and residential structures, FDOT, FDEP and SFWMD projects.  He also has significant experience in construction cost estimating, proposal preparation, construction scheduling, bid document preparation, environmental feasibility studies, preparation of specifications and CQA plans, CQA report preparation, review conformance testing, leachate recirculation pilot test planning and implementation, remedial action plan preparation, quantity takeoff, construction material procurement, and volumetric analysis.

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    • Mr. VanGennip has worked on various solid waste projects as a project manager.  He has over 30 years of experience in design, permitting, and construction of solid waste facilities, water distribution systems, sewer collection systems, subdivisions, commercial and residential structures, FDOT, FDEP and SFWMD projects.  He also has significant experience in construction cost estimating, proposal preparation, construction scheduling, bid document preparation, environmental feasibility studies, preparation of specifications and CQA plans, CQA report preparation, review conformance testing, leachate recirculation pilot test planning and implementation, remedial action plan preparation, quantity takeoff, construction material procurement, and volumetric analysis.

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Ms. Vasquez has experience working on a wide variety of environmental compliance and remediation projects. Her experience includes construction oversight, subsurface soil characterization, soil, surface water and groundwater monitoring, groundwater remediation system operation and maintenance, well installation management, preparing reports, including tabular and graphical presentation of environmental data, as well as, preparing groundwater contour maps and borehole logs.

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    • Ms. Vasquez has experience working on a wide variety of environmental compliance and remediation projects. Her experience includes construction oversight, subsurface soil characterization, soil, surface water and groundwater monitoring, groundwater remediation system operation and maintenance, well installation management, preparing reports, including tabular and graphical presentation of environmental data, as well as, preparing groundwater contour maps and borehole logs.

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Mr. Venchiarutti, RG, is a Project Director in our Northwest region. He has nearly 30 years of experience in the design and management of environmental investigations, and the implementation of soil, soil vapor, sediment and groundwater sampling programs.

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    • Mr. Venchiarutti, RG, is a Project Director in our Northwest region. He has nearly 30 years of experience in the design and management of environmental investigations, and the implementation of soil, soil vapor, sediment and groundwater sampling programs. He also has extensive experience with the characterization of site hydrogeology, underground tank removal, storm water management, and hazardous waste minimization and spill plan preparation.
      He has acted as the senior environmental scientist on three recent hazardous waste investigation projects under multiple concurrent task orders that included hazardous waste compliance and industrial discharge audits for facilities ranging from small businesses to large military bases.
      Mr. Venchiarutti’s primary focus is on soil, sediment and surface water hazardous waste investigations, and groundwater monitoring projects. He is experienced with modeling and tracking contaminant plumes through a variety of media, and evaluating their impacts on human health and the environment.

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Mr. Vidal has three decades of experience in planning, permitting, development, and operation of municipal solid waste (MSW) landfills, with specific technical expertise in landfill gas (LFG) management and recovery systems. He has a broad background in facilities management and project/program management, including budgeting, control of overhead costs, operational efficiencies, engineering design, land use/entitlement, new business development, and contract negotiation. Mr. Vidal is a creative problem solver and decision-maker who is able to manage operations at multiple facilities. He is an effective coordinator of resources who contributes successful achievement of business goals and objectives.

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    • Mr. Vidal has three decades of experience in planning, permitting, development, and operation of municipal solid waste (MSW) landfills, with specific technical expertise in landfill gas (LFG) management and recovery systems. He has a broad background in facilities management and project/program management, including budgeting, control of overhead costs, operational efficiencies, engineering design, land use/entitlement, new business development, and contract negotiation. Mr. Vidal is a creative problem solver and decision-maker who is able to manage operations at multiple facilities. He is an effective coordinator of resources who contributes successful achievement of business goals and objectives.

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Robert Viers
Vice President/Project Director/National Expert on Landfill Gas and Biogas to Energy
Long Beach, CA
National Expert: Landfill Gas and Biogas to Energy
O. (562) 426-9544

Bob Viers, P.E. is a Vice President of SCS Engineers and our National Expert on Landfill Gas and Biogas to Energy. He is a Project Director and Lead Design Engineer for many types of energy projects.

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    • Bob Viers, P.E. is a Vice President of SCS Engineers and our National Expert on Landfill Gas and Biogas to Energy. He is a Project Director and Lead Design Engineer for many types of energy projects. Before joining SCS, he worked for a company that designed, manufactured and provided maintenance services for customized mechanical skids and mechanical packages for a wide range of industries. His responsibilities included review of proposals from bidders and subcontractor’s submittals for compliance with project specifications, codes and regulations, and company standards; equipment inspections during fabrication; management of personnel; preparation of project budgets; equipment commissioning; and technical support and specifications. Fabricated packages utilized positive displacement blowers, sliding vane compressors, multi-stage centrifugal blowers, pumps, liquid ring vacuum pumps, and other rotating equipment used in the environmental, power, water and wastewater treatment, flash-freezing, and commercial sectors.
      Contact Bob at 562-426-9544 or

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Mr. Violenta has over 23 years of professional engineering design and construction experience. He specializes in planning, surveying, design, and structural detailing of landfills; the preparation of road improvement plans; and road construction.

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    • Mr. Violenta has over 23 years of professional engineering design and construction experience. He specializes in planning, surveying, design, and structural detailing of landfills; the preparation of road improvement plans; and road construction. He is skilled in the use of graphics and design programs such as AutoCAD 3D Civil, Photoshop, Canvas, Corel Draw, and various Microsoft software programs. His is experienced in landfill gas (LFG) system design and construction quality assurance (CQA) grading and design at closed and active landfills.

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Ms. Viswanathan is a Vice President with over 10 years of engineering experience related to solid waste engineering, storm water, and water and sewer infrastructure design projects. She is a registered civil engineer.

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    • Ms. Viswanathan is a Vice President with over 10 years of engineering experience related to solid waste engineering, storm water, and water and sewer infrastructure design projects. She is a registered civil engineer. Her experience includes preparation of grading and drainage plans, design of erosion control best management practices, preparation of inspection reports and technical specifications, and providing construction support services on a variety of municipal projects, including landfills.
      She has experience performing analysis of airspace consumption and remaining life assessments using AutoCAD Civil 3D, and in the estimation of closure and post-closure care costs for various landfills. Her work also includes design and installation of Landfill Gas (LFG) extraction wells for existing LFG collection systems, LFG Blower-Flare Facility (BFF) planning and site civil design. In addition, she has experience performing construction quality assurance (CQA) services on a variety of projects, including landfill cell excavation, liner construction and installation of LFG extraction wells. These services include documentation and inspection of ongoing construction activities, certifying work performed per project specifications, preparation of well completion reports and correspondence with clients and construction groups. She has also conducted construction progress meetings and design modifications during project construction.

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