Webinar Series

Don't get behind in your Professional Development Hours. Register for our webinars and receive a certificate good for 1.0 PDH for each session. 

Information about the Next Webinar

Proprietary Stormwater Treatment: Testing, Approval, and Specification for Bidding Contracts

Proprietary treatment manholes, hydrodynamic separators, oil grit separators, are all names for devices that use similar hydrodynamic principles to remove sediment from stormwater runoff in a standard precast structure. Typically used as either stand-alone treatment or as pretreatment to another stormwater control measure these devices have been around for over 30 years. Despite this long history, they are still one of the least understood stormwater control measures when it comes placement, sizing, and formulating a competitive bid.

The regulatory landscape has not helped with no national testing or approval standards and a confusing landscape of stormwater regulations. In the last 5 years though, some standardization has coalesced around the two most widely referenced testing and approval processes, Washington Department of Ecology, and New Jersey Department of Environment Protection.

However, with stormwater regulations varying by state, county, city, and often watershed, there is still a lot of room to make missteps and guidance is not easy to find. This webinar will review and focus on the following to try to help clarify the landscape:

  • Sizing methods
    • Net Annual
    • Flow Rate
    • Target Particle Size, Particle Size Distribution and their impact on performance
    • Verification of performance
  • How test protocols make a significant difference to performance testing
  • Current testing and approval landscape
    • ASTM
    • STEPP (Stormwater Testing and Evaluation for Products and Practices)
    • Canada ETV
    • WADOE
    • NJDEP
  • Elements of a good specification and things to avoid

Attendees will receive a PDH certificate for 1.0 credit.

Register Here


Recent webinars are listed below:

June 29, 2022: Water and Nutrient Cycles
- Recording

May 25, 2022: Considerations for Stormwater Biofiltration and Infiltration

April 27, 2022: Low Impact Sustainable Development
- Recording

March 23, 2022: Talking Trash
- Recording

February 22, 2022: Stormwater Filtration

January 19, 2022: Stormwater Treatment System Design

November 18, 2021: Designing Vortex Flow Controls

October 28, 2021: The Many Faces of Flow Controls

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