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Line 41: − + − + − *[https://etvcanada.ca/wp-content/uploads/2022/03/ISO-14034-ETV-VS-ENVIROBASIN_2021-2024.pdf Littatrap (Now, EnviroBasin™)] + Line 65:
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→Concentrated underground flow
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[[File:Sediment pad Toronto.JPG|thumb|450px|Another example of the City of Toronto's non-proprietary pre-treatment device, known as a "Sediment Pad" shown being used at the curb [[inlet]] of a [[bioretention]] cell on Danforth Av. to capture coarse sediment, trash and debris in influent entering the BMP.]]
==Overland sheet flow==
==Overland sheet flow==
The following pretreatement features are recommended where surface sheet flow is being directed to a BMP (e.g. a [[Bioretention cells|bioretention cell]]) receiving flow from the edge of an impermeable surface such as an asphalt parking lot or a paved plaza:
The following pretreatement features are recommended where surface sheet flow is being directed to a BMP (e.g. a [[Bioretention cells|bioretention cell]]) receiving flow from the edge of an impermeable surface such as an asphalt parking lot or a paved plaza:
!style="width: 10%;"|Type
!style="width: 10%;"|Type
!style="width: 40%;"|Description
!style="width: 40%;"|Description
!style="width: 25%;"|ETV Canada verified products
!style="width: 25%;"|Canadian ETV verified products
!style="width: 25%;"|Other products (not verified)
!style="width: 25%;"|Other products (not verified)
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|Collects and settles debris as overland flow passes through sump to treatment practice.||
|Collects and settles debris as overland flow passes through sump to treatment practice.||
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*Catch basin or other non-proprietary pre-fabricated inlet structure sump. Small forebays may also be used for treatments systems receiving concentrated overland flow’
*Catchbasin or other non-proprietary pre-fabricated inlet structure sump. Small forebays may also be used for treatments systems receiving concentrated overland flow’
*[https://www.rainguardian.biz/ Rain Guardian]
*[https://www.rainguardian.biz/ Rain Guardian]
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!Catch basin inserts
!Catchbasin inserts
|Great for improving water quality in retrofit situations
|Great for improving water quality in retrofit situations
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*[https://etvcanada.ca/wp-content/uploads/2019/10/ISO-14034-ETV-Verification-Renewal-CB-Shield_2019-2022.pdf CB Shield]
*[https://etvcanada.ca/wp-content/uploads/2019/10/ISO-14034-ETV-Verification-Renewal-CB-Shield_2019-2022.pdf CB Shield]
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*[http://www.bmpinc.com/ Snout]
*[http://www.bmpinc.com/ Snout]
*[https://www.enviropod.com/en-ca/products/littatrap Littatrap]
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!Oil and grit (hydrodynamic) separators
!Oil and grit (hydrodynamic) separators
*[http://upstreamtechnologies.us/products/safl.shtml SAFL Baffle]
*[http://upstreamtechnologies.us/products/safl.shtml SAFL Baffle]
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!Manhole baffles
!Catchbasin & Manhole baffles
|Baffles slow flow, encouraging larger, heavier particles to drop out of the water column. A skimmer may also trap floating debris, oils and grease.||
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Baffles slow flow, encouraging larger, heavier particles to drop out of the water column. A skimmer may also trap floating debris, oils and grease.|
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*[https://etvcanada.ca/wp-content/uploads/2022/03/ISO-14034-ETV-VS-ENVIROBASIN_2021-2024.pdf EnviroBasin]
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*[http://upstreamtechnologies.us/products/safl.shtml SAFL Baffle]
*[http://upstreamtechnologies.us/products/safl.shtml SAFL Baffle]