Line 1: |
Line 1: |
− | [[File:Oil-grit separator USGS 2002.png|thumb|Example oil-grit separator USGS 2002 (Wikimedia commons)]] | + | [[File:Sediment pad.JPG|thumb|650px|This non-proprietary pre-treatment device, known as a "Sediment Pad" that is used by the City of Toronto to capture coarse sediment, trash and debris in runoff before water drains into bioretention or other similar green stormwater infrastructure practices. Centralizing sediment and debris capture in a small area near the inlet to the [[bioretention]] feature helps simplify maintenance (City of Toronto, 2021<ref>City of Toronto. 2021. Curb Cut Inlet with Sediment Pad – Layout and Section. ENGINEERING & CONSTRUCTION SERVICES STANDARD DRAWING. Accessed. https://www.toronto.ca/wp-content/uploads/2021/08/9598-ecs-specs-gi-dwgs-T-850.102-Rev0-Sep2021.pdf</ref>.]] |
| Pretreatment devices may be constructed in close association association with one or more [[inlets]]. Different configurations of each exist to accommodate any design. | | Pretreatment devices may be constructed in close association association with one or more [[inlets]]. Different configurations of each exist to accommodate any design. |
| {{TOClimit|2}} | | {{TOClimit|2}} |
| | | |
| + | [[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: |
Line 8: |
Line 9: |
| *[[Gravel diaphragms]] | | *[[Gravel diaphragms]] |
| *[[Vegetated filter strips]] | | *[[Vegetated filter strips]] |
− | *Concrete sump pre-treatment device
| |
| A gravel diaphragm typically requires less setback between the catchment and the BMP. Where space permits, these designs can be used in combination to even greater effect! | | A gravel diaphragm typically requires less setback between the catchment and the BMP. Where space permits, these designs can be used in combination to even greater effect! |
| | | |
Line 15: |
Line 15: |
| * Catch basin or other pre-fabricated inlet structure sump; | | * Catch basin or other pre-fabricated inlet structure sump; |
| * [[Level spreader]]; | | * [[Level spreader]]; |
− | *[[Pretreatment features| Forebays]] (well suited for bioretention cells); | + | *[[Pretreatment features| Forebays]] (well suited for bioretention cells). See [[Pretreatment features]] for guidance on sizing.; |
| * [[Stone]] and [[geotextile]] filter: A shallow excavation on the filter media bed surface at the inlet, lined with geotextile and rip rap or decorative stone cover; and, | | * [[Stone]] and [[geotextile]] filter: A shallow excavation on the filter media bed surface at the inlet, lined with geotextile and rip rap or decorative stone cover; and, |
− | *[[Sand filters]] (well suited for underground [[infiltration]]). | + | *[[Sand filters]] (well suited for underground [[infiltration]]); |
| + | *Concrete sump pretreatment device. [https://rainguardian.biz/ Rain Guardian] is one example of a proprietary sump device. |
| | | |
| ==Concentrated underground flow== | | ==Concentrated underground flow== |
− | This type of pretreatement is dominated by proprietary systems, some of which have undergone verification under the [http://etvcanada.ca/ Environmental Technology Verification (ETV)] program. | + | This type of pretreatment is dominated by proprietary systems, some of which have undergone verification under the [http://etvcanada.ca/ Environmental Technology Verification (ETV) Canada] program. Pretreatment devices suited to concentrated underground flow, or pipe flow include the following: |
| + | * Oil and grit (hydrodynamic) separators |
| + | * Manhole baffles |
| + | * Isolated chamber row filters |
| + | * Membrane filters |
| + | * Media filters |
| + | Membrane and media filters are more commonly used as "stand alone" water quality treatment practices when space for surface practices is not available, but may also be used downstream of LID facilities or treatment trains to enhance removal of sediment and other targeted pollutants (e.g., nutrients, metals) where warranted by receiving water sensitivity. |
| + | <br> |
| | | |
| {|class="wikitable" | | {|class="wikitable" |
Line 27: |
Line 35: |
| !style="width: 10%;"|Type | | !style="width: 10%;"|Type |
| !style="width: 40%;"|Description | | !style="width: 40%;"|Description |
− | !style="width: 25%;"|ETV products | + | !style="width: 25%;"|ETV Canada verified products |
| !style="width: 25%;"|Other products (not verified) | | !style="width: 25%;"|Other products (not verified) |
| + | |- |
| + | !Overland flow sumps |
| + | |Collects and settles debris as overland flow passes through sump to treatment practice.|| |
| + | | |
| + | *Catch basin 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] |
| |- | | |- |
| !Catch basin inserts | | !Catch basin inserts |
| |Great for improving water quality in retrofit situations | | |Great for improving water quality in retrofit situations |
| | | | | |
− | *[http://www.cbshield.com/ CB Shield] | + | *[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/2022/03/ISO-14034-ETV-VS-ENVIROBASIN_2021-2024.pdf Littatrap (Now, EnviroBasin™)] |
| | | | | |
− | *[https://www.enviropod.com/products/littatrap Littatrap]
| |
| *[http://www.bmpinc.com/ Snout] | | *[http://www.bmpinc.com/ Snout] |
| + | |- |
| + | !Oil and grit (hydrodynamic) separators |
| + | |The shape causes rapidly flowing water to form a vortex which forces the larger, heavier particles are outwards and downwards into a lower chamber. Floating debris, oils and grease are trapped behind a baffle or in small tank area, towards the top of the main vortex chamber |
| + | | |
| + | *[https://etvcanada.ca/wp-content/uploads/2023/03/ISO-14034-ETV-Verification-Contech-CDS_2023-2026.pdf CDS] |
| + | *[https://www.verifiglobal.com/media/tsmpnsdh/vg-2019-09-01-hi-downstream-defender-verification-statement-re-issue-v2-for-posting-2022-09-15.pdf?la=da Downstream Defender] |
| + | *[https://www.verifiglobal.com/media/xr3he5i2/vg-2018-10-01-hi-fdhc-final-for-posting-2018-10-15-rev-2019-02-01.pdf First Defense] |
| + | *[https://etvcanada.ca/wp-content/uploads/2021/05/ISO14034-VS_Hydroworks_HS_2021-2024.pdf Hydrostorm] |
| + | *[https://etvcanada.ca/wp-content/uploads/2022/02/ISO14034-Verification-Statement_BioClean-SciCLONE_2022-2025.pdf SCICLONE HDS] |
| + | *[https://etvcanada.ca/wp-content/uploads/2022/10/ISO-14034-ETV-Verification-Statement-NEXT-SDD3_2022-2025-EN.pdf SDD] |
| + | *[https://etvcanada.ca/wp-content/uploads/2020/11/ISO-14034-Verification-Statement-_Stormceptor_EF-EFO_2020-2023.pdf Stormceptor EF] |
| + | *[https://www.verifiglobal.com/media/3drliqul/verifiglobal-verification-statement-for-stormtrap-stormsettler-ogs-signed-2023-09-13.pdf StormTrap Storm Settler] |
| + | | |
| + | *[http://upstreamtechnologies.us/products/safl.shtml SAFL Baffle] |
| |- | | |- |
| !Manhole baffles | | !Manhole baffles |
Line 43: |
Line 71: |
| *[http://upstreamtechnologies.us/products/safl.shtml SAFL Baffle] | | *[http://upstreamtechnologies.us/products/safl.shtml SAFL Baffle] |
| |- | | |- |
− | !Oil and grit (hydrodynamic) separators
| + | !Isolated chamber row |
− | |The shape causes rapidly flowing water to form a vortex which forces the larger, heavier particles are outwards and downwards into a lower chamber. Floating debris, oils and grease are trapped behind a baffle or in small tank area, towards the top of the main vortex chamber
| |
− | |
| |
− | *[http://www.conteches.com/Products/Stormwater-Management/Treatment/CDS.aspx CDS]
| |
− | *[https://www.hydro-int.com/en/products/downstream-defender Downstream Defender]
| |
− | *[https://www.hydro-int.com/en/products/first-defense First Defense]
| |
− | *[http://www.hydroworks.com/hydrostorm.html Hydrostorm]
| |
− | *[http://nextstorm.ca/sdd/ SDD]
| |
− | *[http://www.imbriumsystems.com/stormwater-treatment-solutions/stormceptor-ef Stormceptor EF]
| |
− | |
| |
− | |-
| |
− | !Isolated chamber row filter | |
| |Separate rows at inlets, not connected by pipes to the other chambers, that isolate the bulk of sediment and associated pollutants and designed for ease of access by jet flushing cleaning equipment. | | |Separate rows at inlets, not connected by pipes to the other chambers, that isolate the bulk of sediment and associated pollutants and designed for ease of access by jet flushing cleaning equipment. |
| | | | | |
− | *[https://cultec.com/products/separator-row/ Cultec Separator Row] | + | *[https://etvcanada.ca/wp-content/uploads/2022/03/ISO-ETV-VS_Cultec-Separator-Row_2021-2024_v2.pdf Cultec Separator Row] |
| + | *[https://www.verifiglobal.com/media/knubjbej/verifiglobal-verification-statement-for-stormtech-isolator-row-plus-final-2020-10-27-for-posting.pdf StormTech Isolator Row Plus®] |
| | | | | |
| + | *[https://www.conteches.com/Stormwater-Management/Detention-and-Infiltration/ChamberMaxx-Plastic-Chambers ChamberMaxx®] |
| |- | | |- |
| !Membrane filters | | !Membrane filters |
| |Uses advanced membrane technology adapted from water treatment plants. | | |Uses advanced membrane technology adapted from water treatment plants. |
| | | | | |
− | *[http://www.imbriumsystems.com/stormwater-treatment-solutions/jellyfish-filter Jellyfish Filter] | + | *[https://etvcanada.ca/wp-content/uploads/2023/08/ISO-ETV-Verification-Statement-Imbrium-Jellyfish_2023-2026.pdf Jellyfish Filter (TARP)] |
− | *[https://biocleanenvironmental.com/kraken-filter Kraken Filter] | + | *[https://etvcanada.ca/wp-content/uploads/2022/03/ISO14034-ETV-VS_Imbrium-Jellyfish-Filter_2022-2025.pdf Jellyfish Filter (TAPE)] |
| + | *[https://etvcanada.ca/wp-content/uploads/2022/09/ISO-14034-ETV-Verification-Statement-Kraken-TAPE_2022-2025.pdf Kraken Membrane Filtration (TAPE)] |
| | | | | |
| |- | | |- |
Line 70: |
Line 90: |
| |A variety of proprietary designs and media mixes are available. | | |A variety of proprietary designs and media mixes are available. |
| | | | | |
− | *[http://www.imbriumsystems.com/stormwater-treatment-solutions/filterra Filterra] | + | *[https://etvcanada.ca/wp-content/uploads/2021/12/ISO14034-ETV-VS_Imbrium-Filterra_2021-2024.pdf Filterra] |
− | *Nonproprietary concrete inlet sump
| + | *[https://www.verifiglobal.com/media/zoinc1we/verifiglobal-verification-statement-for-baysaver-bayfilter-final-for-posting-2018-10-29.pdf BaySaver BayFilter] |
− | *[https://baysaver.com/products/bayfilter/ BayFilter] | + | *[https://etvcanada.ca/wp-content/uploads/2023/06/ISO-14034-ETV-Contech-StormFilter_TAPE_2023-06-30-Final.pdf The Stormwater Management StormFilter (TAPE)] |
− | *[https://www.conteches.com/stormwater-management/treatment/stormwater-management-stormfilter StormFilter] | + | *[https://www.verifiglobal.com/media/fl2dqtrj/vg20190601-hi-uff-verification-statement-final-amended-2-20200513-for-posting.pdf Up-Flo Filter] |
| | | | | |
− | |-
| + | *[https://www.imbriumsystems.com/stormwater-treatment-solutions/sorbtive-media Sorbtive Media] |
− | !Overland flow sumps
| + | *[[Bioretention]] [[Filter Media]] |
− | |Collect and settle debris as overland flows pass through sump to treatment device.||
| + | *[https://www.stormwatercenter.net/Assorted%20Fact%20Sheets/Tool6_Stormwater_Practices/Filtering%20Practice/Sand%20and%20Organic%20Filter%20Strip.htm Sand Filters<ref>Stormwater Manager's Resource Center. n.d. Stormwater Management Fact Sheet: Sand and Organic Filter. Accessed: https://www.stormwatercenter.net/Assorted%20Fact%20Sheets/Tool6_Stormwater_Practices/Filtering%20Practice/Sand%20and%20Organic%20Filter%20Strip.htm</ref>] |
− | |
| + | *[https://www.water-pollutionsolutions.com/gutter-guards.html Gutter Guards/Filters] |
− | *[http://www.rainguardian.biz/project-planing/chamber-selection Rain Guardian] | + | *[https://www.freshwatersystems.com/blogs/blog/types-of-downspout-filters Downspout Filters] |
− | *Catch basin or other pre-fabricated inlet structure sump | + | *[[Media filters]] |
− | *Nonproprietary concrete inlet sump | + | *[https://apps.ecology.wa.gov/publications/documents/2110023.pdf High Performance Soil Media Mixes<ref>Howie, D., and Lubliner, B. 2021. Guidance on using new high performance bioretention soil mixes. "Water Quality Program", |
| + | Washington State Department of Ecology. Olympia, Washington. May 2021 - Publication 21-10-023.</ref>] |
| |- | | |- |
| |} | | |} |
| | | |
| + | This table and page are particularly heavy on proprietary systems and information. Please inform us of any omissions or broken links using the box below: |
| + | |
| + | <br> |
| + | </br> |
| + | |
| + | ==Gallery== |
| + | {{:Inlet sumps: Gallery}} |
| | | |
− | This article is particularly heavy on proprietary systems and information. Please inform us of any omissions or broken links using the box below:
| + | ==References== |
| [[category: Pretreatment]] | | [[category: Pretreatment]] |