Residential Yards Investigation and Cleanup

Client: Port of Ridgefield

Location: Ridgefield, WA

MFA assisted the Port of Ridgefield as they took a proactive role in negotiations allowing the Department of Ecology to manage cleanup of a former wood treating site and keeping it off the federal Superfund list. With MFA’s assistance, the port was able to obtain state and federal cleanup funds and contributions for potentially liable parties to minimize the local costs of the project.

As the cleanup process evolved, it was discovered that smokestack emissions had impacted adjacent residential properties. MFA coordinated with homeowners to conduct sampling at properties, developed cleanup plans for each property if contamination was present, and has completed nearly 30 property cleanups. The investigation work is ongoing and additional cleanup likely will be conducted.

Project Components

  • Soil removal
  • Replacement of landscaping
  • Managing the bid process to enable the port to select local contractors to conduct work in individual private yards
  • Working closely with property owners to design cleanups meeting environmental requirements and unique needs of each site
  • Facilitating public involvement and community outreach on behalf of the Port of Ridgefield

Grant Funding

This project is being completed under an Agreed Order with Ecology, using Remedial Action Grant funding. MFA assisted the port with Agreed Order negotiations, preparing work plans and budgets to support grant applications, and financial and progress reporting.


Project Highlights

  • Remedial Action Grant funding
  • Many stakeholders engaged through an MFA-led cleanup process
  • Coordination of nearly 30 individualized cleanup plans for separate residences


Aerial video showcases MFA’s cleanup of contaminated residential properties 

Their Thoughts
Maul Foster & Alongi have nearly completed a soil removal/replacement project at our home in Ridgefield, Washington that has included a complete landscape plan. They have been absolutely wonderful to work with and have met with us whenever we have had questions or needed more information about the process. Curtis R. drew up a beautiful landscape plan for our property and we feel so fortunate to have gotten to work with him. The group went over the plan with us thoroughly beforehand and watching their work come to life has been awesome! Anytime I have had questions, [staff have] shown up at our door to make sure we have our questions answered. This group is a talented bunch of class acts who know their stuff!

- Homeowner

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Phil Wiescher, PhD

Principal Environmental Scientist

(360) 594-6267