Skip to content


TAPE is the Washington State Department of Ecology’s process for evaluating and approving emerging stormwater treatment BMPs.

New stormwater treatment BMPs that are not currently in the Stormwater Management Manuals must be evaluated to demonstrate they meet Ecology’s performance goals for new development and redevelopment.

The Washington Stormwater Center manages the operation and development of the TAPE program in partnership with Ecology.

The TAPE program provides a rigorous evaluation protocol and peer-reviewed regulatory certification process that is recognized across the nation. TAPE evaluations must be conducted in the field, at a site in the Pacific Northwest or at an Ecology approved Stormwater Technology Evaluation Facility. Results from evaluations must meet performance goals for one or more of the following treatment categories:

  • Basic (total suspended solids)
  • Dissolved metals (dissolved copper and zinc)
  • Phosphorus
  • Oil
  • Pretreatment

Navigating the TAPE process and understanding the requirements of TAPE protocol can be daunting. The flow chart shows the general path for moving through the TAPE program. WSC staff are available to assist companies with any questions they have or obstacles they hit during their TAPE evaluations. 

The TAPE program relies on outside expertise, in the roles of our Board of External Reviewers and Stakeholder Advisory Group, to provide recommendations on technology certifications and guidance and input on updates to the TAPE program. Let us know if you are interested in joining either the Board of External Reviewers or the Stakeholder Advisory Group.


Board Of External Reviewers (BER)

The Board of External Reviewers (BER) consists of stormwater experts from across the United States. The Board reviews sampling plans or quality assurance project plans (QAPP’s), technical evaluation reports (TERs), and certain applications that are submitted to the TAPE program. Washington Stormwater Center staff coordinates with the BER to perform technical reviews of TAPE documents and make recommendations to Ecology on technology certification. The BER also provides expertise and guidance on the continuing evolution of the TAPE program.

Below is a list of the Board members along with their affiliations.

Seth Brown, PE Storm and Stream Solutions, LLC
G. Allen Burton, Ph.D. University of Michigan
Donald Carpenter, Ph.D., P.E./ LEED AP Drummond Carpenter, PLLC
Allen P. Davis, PE, Ph.D. University of Maryland
James Houle, MA, CPSWQ University of New Hampshire Stormwater Center
Dick Magee, PE, Sc.D. Technical Director, NJCAT
Kurt Marx, P.E. Marx Environmental Consulting
Dipen Patel, Ph.D. California State University, Sacramento
Larry Roesner, PE, Ph.D. Colorado State University
David Sample, PE, Ph.D. Virginia Tech
Eric Strecker, P.E. Terraphase Engineering Inc.

Stakeholder Advisory Group (SAG)

The Stakeholder Advisory Group (SAG) consists of stormwater professionals from government agencies throughout Washington State, the City of Portland, Oregon, and the Oregon Department of Transportation. The SAG represents organizations that will use, or permit the use of, stormwater treatment technologies. The SAG members provide input and guidance to Ecology and the Washington Stormwater Center regarding revisions to the TAPE Guidance document and the direction and evolution of the TAPE program. 

Below is a list of the SAG members along with their affiliations.

 Dawn Anderson

 Pierce County

 David Batts

 King County Department of Natural Resources and Parks

 Dana de Leon

City of Tacoma, Public Works, Environmental Services

 Kathleen Emmett

 Washington State Department of Ecology

 Anita Fichthorn

 Port of Tacoma

 Dan Gunther

 Oregon Department of Transportation

 Mieke Hoppin

 City of Tacoma, Public Works, Environmental Services

 Doug Hutchinson

 Seattle Public Utilities 

 Mark Maurer

Osborn Consulting, Inc.

 Chris May

 Kitsap County Public Works

 Alex Nguyen

 Washington State Department of Transportation

 Henry Stevens

 City of Portland, Bureau of Environmental Services

 Matt Zarecor

 Spokane County, Engineering & Roads