Permeable Pavement and Filterra Performance at an Amtrak Station in North Carolina, USA

Two proprietary stormwater treatment systems were continuously monitored for water quality and quantity at an Amtrak Station in Fayetteville, NC. A standalone Filterra® biofiltration unit and a permeable pavement-Filterra® treatment train (Filterra BioPave®) were evaluated for nitrogen and phosphorus parameters, sediment, metals, particle size, pH, and specific gravity, with further data to be collected until spring of 2014. Despite the fact that this study is currently ongoing, and final data is not available, the Filterra devices, on their own, appear to remove sediment and sediment-bound nitrogen and phosphorus well with percent removals of at least 45% for all solid species. Dissolved species were not removed as well, with some instances of export. One explanation for this behavior may be the lack of vegetation in the watershed. It is a mostly barren old asphalt lot, which sheds many particulate particles into the Filterra, but may not contribute plant matter, which would be a source of typical dissolved phosphorus and nitrogen. As a result of this possible lack of nutrients, the system did not "see" high loads entering. This would contribute to a lower percent removal, which is one negative toward the metric's use for stormwater control measures (SCM) accreditation. While more data are still coming in, the BioPave system appears to be highly efficient in removing stormwater entirely, almost completely due to the infiltration ability of the permeable pavement system. Due to complications with BioPave Filterra effluent, it cannot yet be concluded how well the Filterra portion of this treatment train further cleans the water, but some preliminary evidence indicates that the double treatment of stormwater—both by a permeable pavement application, and a Filterra filtration system—would utilize different low impact development (LID) processes to clean stormwater further. The results of this field study may be used by Virginia and North Carolina to gain official acceptance in the individual states' best management practices manual with nutrient removals accredited to the systems if appropriate.


  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 155-164
  • Monograph Title: World Environmental and Water Resources Congress 2014: Water without Borders

Subject/Index Terms

Filing Info

  • Accession Number: 01528527
  • Record Type: Publication
  • ISBN: 9780784413548
  • Files: TRIS, ASCE
  • Created Date: May 30 2014 3:01PM