Changes

==Erosion and sediment control measures==

===Pre-construction: erosion and sediment control measures===

[[File:ESC perpendicular grooves.jpg|400px|thumb|right|Perpendicular grooves perpendicular to the grade help prevent the development of rills.]]

[[File:ESC perpendicular grooves.jpg|400px|thumb|right|Perpendicular grooves perpendicular to the grade help prevent the development of rills.]]

Establish required perimeter controls, including erosion and sediment control (ESC) measures, prior to construction and adjust accordingly during construction. ESC measures come in two basic types: structural ESC, which slows and holds runoff from the disturbed area, dissipating erosive forces, promoting ponding, and allowing suspended particles to settle out; and non-structural ESC, which primarily minimizes the exposure time of stripped soils. STEP’s [https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf Erosion and Sediment Control Guide] contains detailed guidance on the design, installation, inspection, maintenance, and decommissioning of ESC measures. This section gives simple, practical advice on structural and non-structural ESC for contractors, inspectors, and those who are new to construction and ESC practices.

Establish required perimeter controls, including erosion and sediment control (ESC) measures, prior to construction and adjust accordingly during construction. ESC measures come in two basic types: structural ESC, which slows and holds runoff from the disturbed area, dissipating erosive forces, promoting ponding, and allowing suspended particles to settle out; and non-structural ESC, which primarily minimizes the exposure time of stripped soils. STEP’s [https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban-Construction_FINAL.pdf Erosion and Sediment Control Guide] contains detailed guidance on the design, installation, inspection, maintenance, and decommissioning of ESC measures. This section gives simple, practical advice on structural and non-structural ESC for contractors, inspectors, and those who are new to construction and ESC practices.

For non-structual ESC measures, be sure to:

For non-structural ESC measures, be sure to:

*Stage clearing and grubbing to minimize exposure of stripped soils.

*Stage clearing and grubbing to minimize exposure of stripped soils.

*Watch the weather and adjust plans accordingly.

*Watch the weather and adjust plans accordingly.

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*Leave vulnerable points with insufficient supports.

*Leave vulnerable points with insufficient supports.

|[[File:ESC doubled up.png|300px|thumb|center|This sedidment fencing has been doubled up and staked in. As a result, it kept a large amount of sediment from entering the adjacent natural heritage feature. It is in need of immediate maintenance, however. (Photo source: CVC)]]  

|[[File:ESC doubled up.png|300px|thumb|center|This sediment fencing has been doubled up and staked in. As a result, it kept a large amount of sediment from entering the adjacent natural heritage feature. It is in need of immediate maintenance, however. (Photo source: CVC)]]  

|[[File:ESC insufficient support.JPG|300px|thumb|center|This sediment fencing was not staked in at the likely point of failure, resulting in the release of sediment into an adjacent natural heritage feature. (Photo Source: CISEC)]]

|[[File:ESC insufficient support.JPG|300px|thumb|center|This sediment fencing was not staked in at the likely point of failure, resulting in the release of sediment into an adjacent natural heritage feature. (Photo Source: CISEC)]]

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|'''Inlet controls'''

|'''Inlet controls'''

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*Support and stake in inlet controls such as sediment socks.

*Support and stake in inlet controls such as sediment socks.

*Use catch basin inserts as a final line of protection.

*Use catch basin inserts as a final line of protection.

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