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Stormwater Best Management Practices in an Ultra-Urban Setting: Selection and Monitoring

Item Number Description
1 Inflow from catch basin
2 Grit-filter bag
3 Inverted elbow for trapping oil and other floatables
4 Series of (4) skimmers which transfer clarified water from 7.6-10.2 cm below the surface of water to next chamber
5 Slotted PVC pipe infiltrates partially-treated storm water from last chamber into constructed wetland gravel substrate
6 Water flows through root zone of wetlands where microbes metabolize petroleum hydrocarbons, nitrogen, and other pollutants. Plants uptake metals, and gravel soils filter bacteria, phosporus and metals.
7 Slotted PVC pipe exfiltrates treated water to outlet
8 Outlet control valve regulates discharge rate (normally set at 0.95 L/m and can be closed in the event of a hazardous materials spill
9 Pent-nuts are removed to open manhole cover for maintenance purposes.

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