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Environmental Consulting

Walden’s experience and success in helping our clients with their environmental compliance requirements is unparalleled. Our comprehensive understanding of all federal, state, and local environmental regulations makes us the perfect fit to be the liaison between you and various regulatory agencies. From an environmental site assessment to a full remedial system design and implementation, Walden can ensure your peace of mind when meeting environmental obligations.

  • Air Monitoring and Compliance
  • Compliance Audits
  • Environmental Site Assessments
  • Groundwater Remediation and Sampling
  • Groundwater/Soil Investigation
  • Landfill Capping Design
  • NYSDEC Part 360 Planning
  • Phase I
  • Phase II
  • RCRA Contingency Plans
  • Remedial Action Plans and Implementation
  • Remedial System Design
  • SEQR Review
  • Solid Waste Permitting
  • Spill Prevention a Well Design and Evaluation and Countermeasure Control Plans
  • Chemical bulk storage and spill prevention plans


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At Walden, we believe that engineering should be precise, compliant, and functional. Walden’s engineering encompasses all facets of design, planning, and construction oversight.

  • Stormwater Pollution Prevention Plans
  • Water, Wastewater, Stormwater System Design and Construction
  • Construction Oversight


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Info Management

Information Management Systems

Walden’s technical team is experienced in handling and managing complex data. Walden’s information systems range from creating centralized data management systems to building customized databases. Whether it is keeping track of sample data collection in an Environmental Database Management System, creating a customized data report, or analyzing spills in a Geographic Information System, Walden can make data processing and retrieval easier than ever in order to support on-going or future projects.

  • Environmental Database Management Systems
  • Geographical Information Systems
  • GIS Modeling
  • Utility Mapping
  • Groundwater Modeling
  • 3D Plume Modeling


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Walden designs underground storage tank and aboveground storage tank systems to meet the challenging needs and specifications of our clients while complying with applicable regulations for tank installation, testing, removal, and reporting. Walden’s technical expertise allows us to design and oversee systems that perform to the highest standards.

  • Chemical Bulk Storage Systems
  • Petroleum Bulk Storage Systems
  • Tank Inspections
  • Spill Prevention Plans
  • Storage Tank Design and Installation
  • Tank Permitting


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Environmental Health and Safety

Walden offers sampling and testing of materials known to cause health and safety risks. We provide this service for various substances including asbestos. Our oversight ensures that our clients are not at risk of exposure to harmful or toxic substances and can continue to run productively, and most importantly, safely.

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Tier II Right To Know

Any facility storing or handling hazardous materials is required to complete the annual New York City Community Right-to-Know Program (RTK) Tier II filing with the New York City Department of Environmental Protection and NewYork City Fire Department. These filings are due annually by March 1st and the process involves several steps that Walden can handle for you completely and efficiently. In addition to chemical plants and power generating stations, Walden is also an Allied Member of the GNYADA (Greater New York Auto Dealer Association). We’ve served several GNYADA car dealerships on an annual basis wit their RTK filing. Failure to complete the filing or doing so incorrectly can result in large fines up to $2,500. Walden can ensure that your RTK filing is completed and filed on-time by providing you with:

  • Help Facilities with questions regarding Right To Know Tier II
  • On-site Facility Inspection
  • Inventory All Hazardous Substances
  • Hazardous substance name and ingredients
    • Physical state
    • Physical and health hazards associated with the chemical
    • The storage locations of all chemicals within the facility
  • Calculate the Volumes and Percentage and Weight of All Hazardous Substances
  • Compile Material Safety Data Sheets
  • Fill Out All Necessary Paperwork for FDNY and NYCDEP, including Facility Inventory Form (FIF)
  • Complete Online Filing Submittal for NYCDEP
  • Submit All Information Before March 1st Deadline
  • Aid facilities with late submission
  • Violation Response Assistance


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Air Quality and Air Emissions Permitting

Walden will collect both indoor and/or outdoor air samples and have them analyzed for dust, metals and organic compounds to determine OSHA and/or US EPA compliance. Projects include site inspections, system design, application and drawing preparation and filing for Federal, State and Local Permits, including:

  • Title V Permit (US EPA and NYS DEC)
  • Air Permit (NYC DEP)
  • Testing
  • Permitting
  • Control Design
  • US EPA Method 9 Visible Emission Evaluation Report (DSNY)
  • Community Air Monitoring Protocols – CAMP (NYS DEC, DSNY & NYC DPR)


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Lab Consulting

Walden’s scientists are highly experienced lab consultants. We strive to develop and implement innovative field testing protocols and procedures.

  • Air Quality Studies
  • Wastewater Sampling
  • Soil and Solid Waste Sampling
  • Correlation Studies
  • QAPP Preparations
  • Waste Characteristic Planning
  • Audits of Existing Facilities


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Solid Waste Permitting

Walden engineers are experts at the evaluation and design of your facility in accordance with local and state zoning, offsets, regulations, and requirements.

  • Preparation of required applications
  • Documentation for obtaining permits
  • Preparation of required annual and quarterly waste reports and performance standards for permit renewal, including opacity testing
  • Continued compliance with government regulations