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Line 140: − − Things to consider in design: − *If the system is unlined it is hydraulically equivalent to a [[bioretention]] cell and provides similar water quality benefits. − *If the system is lined and underdrained it is hydraulically similar to a large [[stormwater planter]]. Depending on the design detail it may retain significant stormwater within the planting soil volume and will provide water quality benefits.
→Modular Soil Support Systems
===Modular Soil Support Systems===
===Modular Soil Support Systems===
Modular soil support systems (also referred to as “soil cells”) consist of plastic or concrete structures, available in a variety of shapes and sizes, that provide structural support for the overlying pavement while providing uncompacted planting soil within the tree root zone. They are installed adjacent to tree pits to provide room for roots to spread out under the supported pavement portion of the trench. Growing medium backfill typically has higher organic matter content than structural soil medium. The looser structure and higher nutrient content of the growing medium provides the most favorable environment for healthy tree growth in an urban setting.
Modular soil support systems (also referred to as “soil cells”) consist of plastic or concrete structures, available in a variety of shapes and sizes, that provide structural support for the overlying pavement while providing uncompacted planting soil within the tree root zone. They are installed adjacent to tree pits to provide room for roots to spread out under the supported pavement portion of the trench. Growing medium backfill typically has higher organic matter content than structural soil medium. The looser structure and higher nutrient content of the growing medium provides the most favorable environment for healthy tree growth in an urban setting.
[[File:Goss Trap.PNG|thumb|400px|A profile view of a cast in place catch basin with sump, along with an attached Goss trap, used to trap and limit the amount of floatable materials, debris oils, hydrocarbons, etc. from entering the municipality's storm sewer system. This pre-treatment device attaches to the catch basin's outflow pipe.<ref>City of Toronto. 2020. Construction Specifications and Drawings for Sewers and Watermains. https://www.toronto.ca/services-payments/building-construction/infrastructure-city-construction/construction-standards-permits/standards-for-designing-and-constructing-city-infrastructure/construction-specifications-for-sewers-and-watermains/</ref> This image was sourced from the [https://www.toronto.ca/services-payments/building-construction/infrastructure-city-construction/construction-standards-permits/standards-for-designing-and-constructing-city-infrastructure/construction-specifications-for-sewers-and-watermains/ City of Toronto's Construction Specifications and Drawings for Sewers and Watermains]. <ref>City of Toronto. 2020. Construction Specifications and Drawings for Sewers and Watermains. https://www.toronto.ca/services-payments/building-construction/infrastructure-city-construction/construction-standards-permits/standards-for-designing-and-constructing-city-infrastructure/construction-specifications-for-sewers-and-watermains/</ref>]]
[[File:Goss Trap.PNG|thumb|400px|A profile view of a cast in place catch basin with sump, along with an attached Goss trap, used to trap and limit the amount of floatable materials, debris oils, hydrocarbons, etc. from entering the municipality's storm sewer system. This pre-treatment device attaches to the catch basin's outflow pipe.<ref>City of Toronto. 2020. Construction Specifications and Drawings for Sewers and Watermains. https://www.toronto.ca/services-payments/building-construction/infrastructure-city-construction/construction-standards-permits/standards-for-designing-and-constructing-city-infrastructure/construction-specifications-for-sewers-and-watermains/</ref> This image was sourced from the [https://www.toronto.ca/services-payments/building-construction/infrastructure-city-construction/construction-standards-permits/standards-for-designing-and-constructing-city-infrastructure/construction-specifications-for-sewers-and-watermains/ City of Toronto's Construction Specifications and Drawings for Sewers and Watermains]. <ref>City of Toronto. 2020. Construction Specifications and Drawings for Sewers and Watermains. https://www.toronto.ca/services-payments/building-construction/infrastructure-city-construction/construction-standards-permits/standards-for-designing-and-constructing-city-infrastructure/construction-specifications-for-sewers-and-watermains/</ref>]]