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Line 102:
→Backfill Granular and Pipes (SPC)
* Vegetation: If sized correctly, it works more effectively in areas with more dispersed flow. However, in concentrated flow and sediment areas it might not be the best option. Sediment removal can be more difficult in areas of dense vegetation. An advantage of using vegetation as pre-treatment is that it can be easily integrated into the landscape design.
* Vegetation: If sized correctly, it works more effectively in areas with more dispersed flow. However, in concentrated flow and sediment areas it might not be the best option. Sediment removal can be more difficult in areas of dense vegetation. An advantage of using vegetation as pre-treatment is that it can be easily integrated into the landscape design.
'''Soil Media / Filter Media'''<br>
'''Soil Media / Filter Media'''<br>
For small LID facilities, apply soil media in 150-300 mm lifts until desired top elevation of bioretention, bioswale or rain garden area is achieved. Thoroughly wet each lift before adding the next and wail until water has drainer through the soil before adding the next lift. Avoid manual or machine compaction. If possible, equipment should not be operated within the infiltration practice. If required, allow soil to dry before equipment is allowed back into the practice.
For large LID facilities, slinger trucks are recommended for spreading soil in even layers and reducing the need to move soil media manually or by backhoe. If possible, equipment should not be operated within the infiltration practice. If necessary, appropriate low ground pressure rated equipment can enter after at least 45 cm of bioretention, bioswale or rain garden soil is installed and has properly dried.
Soil/filter media’s design parameters and assumptions should be confirmed through in-situ permeability testing (e.g., permeameter measurements to determine hydraulic conductivity). Results of permeability testing should be reviewed by the designer and, if required, changes to the LID design may be needed.
All exposed soil areas that are not being actively worked must have temporary erosion protection or permanent cover within 7 days for slopes 3:1 or greater and 14 days for slopes 3:1 or greater and 14 days for slopes 3:1 or flatter. This should apply to all exposed soil areas year-round and until the site is stabilized.
Upon arrival:
Chain of custody
Visual inspection
Grab a sample, ribbon test
===Finishing Grades: Inlet, Outlet, Biomedia, Plants (SPC)===
===Finishing Grades: Inlet, Outlet, Biomedia, Plants (SPC)===