THE MOST EFFICIENT METHOD FOR TREATMENT OF STORMWATER PEAK FLOWS AND RUNOFF POLLUTANTS

A Service of Extention Basin Systems, Inc.
13 Dove Court
 Croton-on-Hudson, NY 10520 (914) - 271 4762

THE STORMWATER DEVICE TO OPTIMIZE STORMWATER TREATMENT AND PEAK STORM FLOW CONTROL

Finished development in 2002 (patent pending 2003) this device should be used for new developments to comply with federal and state (and local) water quality and storm water discharge limitations (NEPA, EPA, SPDES) especially when land area for installation is limited though provides savings even when excess land is available.

The device may also be used as a retro-fit to reduce peak flows and provide storm water treatment at the least possible size.

The Extention Basin is already in operation in a variety of locations and has obtained numerous local and state (NY) approvals for use in industrial, commercial and residential sites.

FEATURES:

1. Continuous peak flow reduction over any range of storms (e.g. 0 year thru 100 year storms)

2. Capture the first-flush where 80-90 per cent of pollutants in polluted runoff are found in storm water or the required Water Quality Volume WQv

3. Use in conjunction with any BMP (e.g. extended detention, infiltration, sand filter, etc)

4. Absolute minimum storage volume - generally 50% -65% compared to conventional systems

5. Minimum land footprint - fully subsurface or above ground units are available

6. Modular construction

7. Expandable for future uses and watershed changes

8. Accurate natural watershed hydrograph matching (peak flow, time to peak) to minimize storm water impacts downstream

9. Passive design with no moving parts - no valves or controls

10. Can adapt to standard water quality practices such as extended detention, infiltration basins, etc.

11. Complete operation and performance may be modeled using HEC-1 software

12. Materials: Plastic or pre-cast concrete for subsurface units.

THE EXTENTION BASIN IS AVAILABLE IN ANY PRACTICAL SIZE FOR A VARIETY OF USES:

1. Control storm water and water quality impacts from the new development of roads, homes, shopping centers, etc.

2. Retro-fit existing drainage system to protect lakes and streams from pollutants, polluted runoff and excessive peak flows.

New Research Paper!  The contribution of small storms to annual runoff volumes using the SCS curve number (2005)

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Webmaster: HardyCross@aol.com Copyright All Rights Reserved 2003 Products are Patent Pending 2003  Updated on 12/23/2005