Changes

*[[Gravel diaphragms]]

*[[Gravel diaphragms]]

*[[Vegetated filter strips]]

*[[Vegetated filter strips]]

A gravel diaphragm typically requires less setback between the catchment and the BMP.  Where space permits, these three 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!

==Concentrated overland flow==

==Concentrated overland flow==

* [[Level spreader]];

* [[Level spreader]];

*[[Pretreatment features| Forebays]] (well suited for bioretention cells);

*[[Pretreatment features| Forebays]] (well suited for bioretention cells);

* [[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://acfenvironmental.com/products/stormwater-management/filtration/rain-guardian/ Rain Guardian] is one example of a proprietary sump device.

==Concentrated underground flow==

==Concentrated underground flow==

!style="width: 25%;"|Other products (not verified)

!style="width: 25%;"|Other products (not verified)

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!OGS Baffles

!Catch basin inserts

|Baffles slow flow, encouraging larger, heavier particles to drop out of the water column. A skimmer may also trap floating debris, oils and grease.||

|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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*[http://upstreamtechnologies.us/products/safl.shtml SAFL baffle]

*[http://upstreamtechnologies.us/products/safl.shtml SAFL Baffle]

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!Hydrodynamic OGS

!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

|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

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*[http://www.conteches.com/Products/Stormwater-Management/Treatment/CDS.aspx CDS]

*[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/downstream-defender Downstream Defender]

*[https://www.hydro-int.com/en/products/first-defense First Defense]

*[https://www.hydro-int.com/en/products/first-defense First Defense]

*[http://www.hydroworks.com/hydrostorm.html Hydrostorm]

*[http://www.hydroworks.com/hydrostorm.html Hydrostorm]

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!Cartridge filters

!Isolated chamber row filter

|Uses advanced membrane technology adopted from water treatment plants.

|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.

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*[http://www.imbriumsystems.com/stormwater-treatment-solutions/jellyfish-filter Jellyfish filter]

*[https://cultec.com/products/separator-row/ Cultec Separator Row]

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!Catchbasin inserts

!Membrane filters

|Great for improving water quality in retrofit situations

|Uses advanced membrane technology adapted from water treatment plants.

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*[http://www.cbshield.com/ CB Shield]

|Collects and settles debris as overland flow passes through sump to treatment device.||

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*[https://www.enviropod.com/products/littatrap Littatrap]

*[http://www.rainguardian.biz/project-planing/chamber-selection Rain Guardian]

*[http://www.bmpinc.com/ Snout]

*Catch basin or other pre-fabricated inlet structure sump

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