Brownfield Development

Walden has the experience and expertise needed to guide your organization successfully through the process of entering a proposed site into a Brownfield program and prudently obtaining and utilizing available property development resources. Certain Brownfield sites may be eligible for tax rebates, grant funding, or other incentives that make them attractive as redevelopment sites. Throughout the process, our team of experts will work closely with your stakeholders to identify short-term and long-term goals and ensure that decisions are based on factual, substantiated data.

Unforeseen issues may exist or arise that could impede an organization’s ability to redevelop a site as desired. The Walden team can arm you with the information needed to assess the environmental quality of your property, understand the hazards that may exist on the site and what danger(s) they pose to the health and welfare of neighboring communities, develop remediation strategies, and determine permitting requirements for site (re)development.


  • Preliminary and Historical Site Assessments
  • Risk Assessments
  • Feasibility Studies
  • Community Outreach and Liaison


  1. Drones allow for monitoring of impacts and progress of demolition, remediation, and construction phases from a unique vantage point that provides a valuable supplement to the more typical ground-level view. 
  2. Drones can be used to perform rapid visual inspections of building exteriors, pavement, vegetation, roofing, drainage features, and other property characteristics while utilizing fewer resources and posing less risk than traditional methods.
  3. Drones can produce high-resolution orthomosaic maps of the entire property, providing much higher detail than satellite imagery. These can be captured and updated frequently throughout the life of a project.
  4. Drone Thermal Imaging can be used to identify oil leaks, water leaks, moisture issues, and many more discrepancies invisible to a visual inspection.
  5. Drone Photogrammetry allows the imagery captured by a drone to be used to generate detailed 3D models and measurements of physical structures and property. With these models, we can identify slopes, calculate lines-of-sight, measure topography (low-lying areas, peaks), watersheds, and more.
  6. Where removal or addition of soil/earthwork is involved, drones can accurately calculate 3D volumes for excavations or fill.
  7. Drones can generate high-quality photographs and videos that are valuable for site mapping, agency interactions, property marketing and public outreach.


Former Crown Dykman Facility, Nassau County, NY

Walden performed a supplemental soil and groundwater investigation to define the extent of contamination detected in beneath a former dry cleaning facility on Long Island, New York on behalf of the property owner.  Previous sampling completed did not define the extent of contamination in the subsurface soil above the water table, leaving the property owner potentially responsible for remediation of contamination migrating from surrounding industrial properties. Read more

Brownfields Cleanup Program Application and Remedial Plan

Walden Environmental Engineering (Walden) was retained as the environmental consultant for a dry-cleaning operator located in a suburban Long Island community to help the owner gain entry to New York State’s Brownfield Cleanup Program (BCP) and maintain the on-site remedial system.  The entire Site, including the parking lot, is approximately 10,500 square feet, which the owner intends to keep using as a dry-cleaning operation. The surrounding properties are currently zoned for use as business and residential properties. Read more

Brownfields Cleanup Program Application and Site Remediation

Walden has provided environmental consulting services at this former dry cleaners site in northwestern Nassau County since the early 2000’s, to the property’s current and former owners.  This site was previously part of the Voluntary Cleanup Program after a release of tetrachloroethylene (PCE) was first noted in 1995. The PCE contamination was suspected to originate from floor drains and from a leaching pool and drywell on the property that were associated with the former dry cleaner operations. Read more