New Success Stories on Stormwater Management (SWM) Pond Sediment Reuse Approvals

This webinar highlights how to obtain Ontario Ministry of Environment, Conservation, and Parks (MECP) approval for stormwater management (SWM) pond sediment reuse under the new ‘Excess Soil regulation’ and how changes in urban land use practices could increase SWM pond sediment reuse opportunities as cost effective and sustainable alternatives to landfill disposal.

Presentation Overview:

Part 1: Understanding How Urban Versus Highway Land Use Practices Influence SWM Pond Sediment Contamination Levels and Reuse Considerations

An ongoing 15-year study of over 200 Ontario urban stormwater management (SWM) ponds has found that over 60% of sediments exceeded the Table 3 standards for polyaromatic hydrocarbons (PAHs).

Coal tar sealants (CTS) used to blacktop driveways and parking lots is an important PAH source. SWM pond sediments and highway sweepings collected from the HWY 401 ETR quantify PAHs in CTS-free materials. PAHs were non-detectable in most samples, with no soil standard exceedances at all.

The weight-of evidence indicates that eliminating CTS from urban environments could increase SWM pond sediment reuse opportunities.

Part 2: SWM Pond Sediment Reuse Case Studies and Lessons Learned

  1. Ministry of Transportation of Ontario (MTO) SWM Pond Sediment Reuse:
    The MTO received the first waste management ECA to transport 15,000 m3 of undewatered Mississauga sediment to build berms on Hwy 401 and 403 land. Tipping fee savings of $3.3 million.
  2. City of Kitchener SWM Pond Sediment Reuse:
    Although MECP approved the reuse of sediment that did not exceed Table 2 standards, reuse was blocked by local jurisdictional issues. The alternative will use the sediment to build berms on Kitchener industrial roadsides.

Learning Objectives:

  • Understand how to obtain MECP approval for SWM pond sediment reuse under the new Excess Soil Regulation.
  • Understand the practical and regulatory approval process for transporting and applying undewatered sediment to recipient sites.
  • Understand how changes in urban land use practices could increase SWM pond sediment reuse opportunities as cost effective and sustainable alternatives to landfill disposal.

Presenters:

Francine Kelly-Hooper, Stantec and Aroni McCutcheon, Ontario Ministry of Transportation

 

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If you have any additional questions, please contact Victoria Kring at Victoria.Kring@trca.ca

TRCA HST Registration number is 10808 8584 RT001