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Solid Waste


Sustainably and cost-effectively managing waste materials has become increasingly difficult as existing facilities approach capacity, available land resources diminish, and as there is greater emphasis on reuse and recycling.  ARM’s solid waste customers benefit from highly responsive service from engineers with personalities, creative technical solutions from industry leaders, and regulatory knowledge and relationships that get projects approved and built faster. ARM’s solid waste engineers have the unique ability to see challenges from the owner’s perspective, which helps us provide integrated, cost-effective, constructible solutions without hand holding so that our clients can focus on other job demands with the peace of mind of knowing that the engineering, compliance, and construction of their capital projects is in good hands. 

  • Navigating PFAS

    Learn more on how ARM Group leads in environmental solutions to this challenge!

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  • Landfill Design & Engineering

    • Landfill Liner System Analysis & Selection
    • Landfill Cap/Alternative Cover System Design
    • Leachate Management Systems
    • Composting Facility Design
    • Gas Management & Utilization Systems
    • Odor Control 
    • Closure/Post-Closure Plans
    • Airspace Recovery/Enhancement
    • Construction Quality Assurance Inspection & Testing
    • Subsidence Mitigation Plans
    • Facility and Support Area Design
    • Complete Expansion Design & Permitting
    • Geotechnical Engineering & Slope Stability Modeling
    • Stream & Wetland Mitigation Permitting, Design, and Construction 


  • Landfill Operational Support

    • Airspace & Capacity Analysis
    • Waste Composition Evaluation
    • Daily/Alternative Cover Product Evaluation
    • Financial Assessment & Capital Cost Planning
    • Annual Landfill Sequencing Plans
    • GPS/Electronic Equipment Data Management
    • SPCC/PPC/EERP Plan Development
    • Volume Reporting & Drone Capacity Calculations
    • Air Quality & Emissions Compliance

  • MSE Berms

    • Design / Permitting
    • Encapsulated MSE Berms
    • Solar Integrated Berms
    • Design and Cost Optimization
    • Construction Inspection & Testing 
    • Inspections & Monitoring

  • Groundwater & Hydrogeology

    • Regulatory Permitting/Reporting
    • Monitoring Plans
    • Well Siting, Installation & Development
    • Site Hydrogeology
    • Aquifer Delineation
    • Water Quality Sampling & Data Analysis and Management

  • Landfill Gas

    • Landfill Gas Generation Assessment
    • Engineering Design & Permitting Services
    • System Troubleshooting and Optimization
    • Construction Quality Assurance and Wellfield Balancing
    • LFGTE System Design, Operation, & Interconnection
    • Flare and Blower System Design/Operation Support


  • Controls & Automation

    • Control System & Automation Design & Installation
    • Electrical Engineering, Interconnection, Transmission
    • SCADA Systems
    • In-House Panel Construction (UL-Listed)
  • Landfill Closure

    • Traditional & Alternative Cover System Design
    • Renewable Energy Siting and Permitting
    • Gas Control, Recovery, & Utilization
    • Post-Closure Use
  • Construction CQA & Management

    • Bid Document Preparation
    • Technical Specifications & CQA plans
    • Constructability Reviews
    • Construction Management & Administration
    • Construction-Phase Engineering
    • CQA Monitoring
    • Materials Testing
  • Site Investigations & Regulatory Support

    • Harms/Benefits Analysis
    • PFAS Investigation & Migration Studies
    • Monitoring & Data Management eDMR and Discharge Permit Reporting
    • Annual Operations Reports
    • Waste Stream Approvals and Generator Documentation Support
    • Beneficial Use & Source Reduction
    • Radiation Protection Action Plans
    • Bonding & Financial Assistance
    • Post-Closure Inspections
    • Post-Closure Land Use & Redevelopment

  • Leachate

    • Leachate Generation Rate Estimates
    • Leachate Collection & Transfer Design
    • Leachate Storage Design
    • Leachate Collection System Testing & Disposal Evaluations 
    • PFAS Analysis & Management
    • Leachate Management System Installation
    • Treatment Plant Operation  
    • Treatment Plant Upgrade Design/Selection



  • Stormwater

    • Stormwater Management Plans
    • NPDES Permitting & Monitoring
    • Construction Sequencing Plans 
    • NPDES Permitting
    • Stormwater Modeling & Routing Calculations
    • Stormwater Pollution Prevention Plans
    • Sampling & Reporting
    • PFAS Monitoring and Management



  • Remedial Systems

  • Transfer Stations

    • Transfer Station Conceptual Plan Development
    • Innovative System Improvements
    • Transfer Station Site Investigations, Permitting, & Compliance Support
    • Construction-Phase Engineering, Testing, & Quality Assurance 

Featured Projects


Benjamin S. Allen, P.E.

Director of Engineering

Solid Waste Practice Area Leader

Mr. Allen has devoted his career to the solid waste industry and was appointed to be ARM’s Solid Waste Practice Area Leader in January 2024. Throughout his career, Mr. Allen has taken numerous projects through a conceptual design, permitting, and construction, providing clients with turn-key services. Projects have included landfills, transfer stations, and solar developments. Mr. Allen’s technical background is based in geotechnical engineering. His technical background has been useful in completing several landfill expansions involving mechanically stabilized earth (MSE) berms, some of which have utilized alternative backfill materials.   Mr. Allen has a B.S. in Civil and Environmental Engineering from Bucknell University and is a registered Professional Engineer in New Jersey and Pennsylvania. Outside of work, he enjoys coaching his son’s baseball team, traveling, and golf. 

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