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LandscapingCivil

Stormwater Swale & Rain Garden Inspection & Test Plan

ITP for WSUD stormwater management features including bio-retention swales, rain gardens, permeable paving sub-bases and gross pollutant traps covering grading, filter media and planting.

13 checklist items
2 hold points
1 witness points
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Earthworks & Grading

Requires sign-off
P/F
Swale grades per civil design
Hold
P/F
Subgrade levels within tolerance
P/F
Inlet and outlet levels per design
P/F
Overflow weir set to correct level

Filter Media & Drainage

Requires sign-off
P/F
Geotextile liner installed per specification
P/F
Drainage aggregate layer placed and graded
P/F
Slotted collection pipe installed at base
P/F
Filter media depth per design (typically 400-600mm)
Hold
P/F
Filter media meets hydraulic conductivity spec

Planting & Completion

Requires sign-off
P/F
Plant species per WSUD planting schedule
P/F
Planting density per design
Witness
P/F
Jute mat or rock mulch (no floating mulch)
Establishment watering program commenced

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