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Stormwater Management Plan - Rev 1
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Log in to see the plans as drawn PRINCIPLES OF OPERATION
Stormwater runoff enters the manhole or concrete structure via an inlet pipe and begins to fill the structure. When
the water surface elevation in the vault/manhole reaches operating level, water flows through the SFC driven by a
hydrostatic head. Within the SFC, the water flows through a proprietary filter media and drains via a vertical pipe.
The vertical drain is connected to the under drain system which conveys filtered water to the outfall. During a typical
storm event, the SPELFilter system has four cycles:
1. Vault fill and air release;
2. Uniform bed load hydrodynamic filtration;
3. Uniform bed load siphon filtration; and
4. Siphon break and hydrodynamic backwash.
4
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