Changes

[[File:Treatmenttrain TRCA.JPG|thumb|550px|Example of a generalization of utilizing a “Treatment Train Approach” illustrated here. Using [[permeable pavement]] as a source control/lot control on your business/residential property, effluent then flows into conveyance control such as an [[Exfiltration trench|exfiltration system]], used in conjunction with the minor stormwater system as shown above. and then flowing into a stormwater management pond (wet pond) for additional erosion and flood control (TRCA, n.d.).<ref>TRCA, n.d. Understand - Stormwater Management. Accessed: https://trca.ca/conservation/stormwater-management/understand/</ref>]]

[[File:Treatmenttrain TRCA.JPG|thumb|550px|Conceptualization of the “Treatment Train Approach”. Source controls (e.g. [[permeable pavement]], [[rain gardens]]) drain to conveyance practices (e.g [[enhanced grass swale|grass swale]], [[exfiltration trench|exfiltration system]]) within the drainage network, and these in turn drain to end-of-pipe practices (e.g. stormwater management pond, [[infiltration chambers|underground tank]].  The upstream treatment practices are typically designed to provide water quality treatment whereas the large storage end-of-pipe facilities provide erosion and flood control, and may also have a water quality polishing function (TRCA, n.d.).<ref>TRCA, n.d. Understand - Stormwater Management. Accessed: https://trca.ca/conservation/stormwater-management/understand/</ref>]]

These are the most common types of treatment trains.  They typically involve installation of one or more [[pretreatment]] devices upstream or at the [[inlet]] of the primary stormwater treatment facility.   

These are the most common types of treatment trains.  They typically involve installation of one or more [[pretreatment]] devices upstream or at the [[inlet]] of the primary stormwater treatment facility.   

[[File:Treatment train air force.JPG|thumb|800px|An example of a stormwater treatment train approach at Tyndall Air Force Base in Florida, in a coastal environment. This example includes source controls of [[bioretention]] parking islands, [[permeable pavement]], and conveyance controls of[[swales]], a natural infiltration basin in a forested woodlot, and end-of-pipe controls of [[dry ponds]], [[constructed wetlands]] and coastal dunes. All of these features help to reduce traditional SWM features' maintenance, treatment and rehabilitation coasts, while also reducing pollutants into the receiving waterbody. (U.S Air Force, 2020)<ref>U.S. Air Force. n.d. LANDSCAPE MASTER PLAN - C. Site Development Criteria.  CO4. Stormwater - C04.3.2 Stormwater at Individual Building Sites. Accessed: https://www.tyndallifs.com/images/LMP_pdf/TAFB_Final_LandscapeMasterPlan_2020-09-24_SectionC04.pdf</ref>]]

[[File:Treatment train air force.JPG|thumb|800px|. An example of a stormwater treatment train approach within a coastal environment at Tyndall Air Force Base in Florida. This example includes source controls of [[bioretention]] parking islands, [[permeable pavement]], combined with [[swales|swale]] based conveyance controls and end-of-pipe controls using an infiltration basin, [[dry ponds]], [[wetlands|constructed wetlands]] and coastal dunes. All of these features help to reduce traditional maintenance, treatment and rehabilitation costs of the SWM features, while also reducing pollutants discharged to the receiving waterbody (U.S Air Force, 2020)<ref>U.S. Air Force. n.d. LANDSCAPE MASTER PLAN - C. Site Development Criteria.  CO4. Stormwater - C04.3.2 Stormwater at Individual Building Sites. Accessed: https://www.tyndallifs.com/images/LMP_pdf/TAFB_Final_LandscapeMasterPlan_2020-09-24_SectionC04.pdf</ref>.]]

'''Example''': Runoff into larger treatment practices such as [[bioretention]] or [[Stormwater Tree Trenches|stormwater tree trenches]] may be pretreated by [[Inlet sumps: Gallery|concrete sumps]] at [[curb cut]] inlets, [[forebays]] or catch basin inserts, which are designed to capture coarse sediment, debris and trash.  Centralizing sediment and trash captured at the inlet or entrance to the facility reduces maintenance by preventing [[filter media]] [[clogging]] and limiting the area over which sediment and trash needs to be removed.  In some cases, pre-treatment device clean-outs may be incorporated into existing municipal catch basin cleaning programs.   

'''Example''': Runoff into larger treatment practices such as [[bioretention]] or [[Stormwater Tree Trenches|stormwater tree trenches]] may be pretreated by [[Inlet sumps: Gallery|concrete sumps]] at [[curb cut]] inlets, [[forebays]] or catch basin inserts, which are designed to capture coarse sediment, debris and trash.  Centralizing sediment and trash captured at the inlet or entrance to the facility reduces maintenance by preventing [[filter media]] [[clogging]] and limiting the area over which sediment and trash needs to be removed.  In some cases, pre-treatment device clean-outs may be incorporated into existing municipal catch basin cleaning programs.