| 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. |
