Skip to main content
Start of main content

Passive Compost-based Treatment of Industrial Stormwater

Redesign and rehabilitation for two engineered wetlands designed to treat metal-impacted industrial stormwater

  • El Dorado, Arkansas

    El Dorado, Arkansas

Stantec investigated, developed, and implemented an engineering solution to two failed engineered wetlands designed by others

The Lanxess Corporation found that its two engineered wetlands designed to treat metal-impacted industrial stormwater in El Dorado, Arkansas were failing—but they did not know why. As they were under a Consent Administrative Order from the State, the failing wetlands put their regulatory compliance in jeopardy.

Lanxess reached out to Stantec to investigate and develop a solution. We completed a design review and field inspection of the systems to determine the failure was due to an underlying geotextile fabric installed between the compost treatment media and the effluent gravel drainage layer. In addition, we completed head loss calculations to determine the original horizontal flow design would result in short circuiting and decreased hydraulic retention time. To resolve these performance and operation issues, we prepared a rehabilitation design to convert both wetlands into downflow filters with a continuous underlying gravel drainage layer and elimination of all geotextile layers.

We successfully rehabilitated the systems, which have been functioning as designed and meeting surface water discharge criteria. The redesigned wetlands not only help Lanxess remain in regulatory compliance, but also prevent heavy metals contamination from discharging into waterways.

At a Glance

  • Lanxess Corporation
Arkansas Environmental Federation, Diamond Award for Excellence in Environmental Leadership, 2020
American Chemistry Council, Waste Minimization, Reuse, and Recycling Award, 2020
Meet Our Team

Amanda Ludlow, Principal

I use nature to seek out sustainable solutions to environmental problems.

Amanda Ludlow


We're better together

  • Become a client

    Partner with us today to change how tomorrow looks. You’re exactly what’s needed to help us make it happen in your community.

    Contact Us
  • Design your career

    Work with passionate people who are experts in their field. Our teams love what they do and are driven by how their work makes an impact on the communities they serve.

    Join the Team
End of main content
To top