Stormwater Treatment System: Submerged Stormceptor For High Water Table
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We designed the Submerged Stormceptor to remove total suspended solids, free oil, and other pollutants from stormwater run-off in partially submerged pipes.
The precast sections are manufactured in easy-to-assemble components and are available in the same sizes as the In-Line Stormceptor (eight models, ranging from 72-inch to 144-inch diameter). A customized weir separates the upper (by-pass) and lower (treatment) chambers.
Normal Operating Conditions
The Submerged Stormceptor operates much like the In-Line Stormceptor. The submerged design includes a customized weir height (depending on the average water level in the storm sewer) and two inlet drop pipes.
Under normal operating conditions (more than 90% of all storm events), the Submerged Stormceptor is effective for free oil and sediment removal. The lower drop pipe, located at the inlet of the storm sewer, is always submerged. This drop pipe transports suspended solids and bedload sediment into the treatment chamber. The higher drop pipe transports lighter material (free oil) and floatables into the separation chamber.
By-Pass Operating Conditions
During infrequent, high flow events (less than 10% of all storm events), water is conveyed over the internal by-pass weir directly to the downstream storm sewer. This by-pass activity prevents high velocities of water from entering the treatment chamber. The Submerged Stormceptor is not effective for oil removal under fully submerged conditions.
Maintenance Procedure
Inspect and maintain the Submerged Stormceptor from the surface, without entry into the unit. Perform maintenance once stored volume reaches 15% of the Stormceptor capacity, or immediately in the event of a spill.
Maintenance intervals vary depending on the application. Therefore, we recommend quarterly inspections during the first year of installation, so you can accurately establish a maintenance schedule.
Remove oil and sediment through the 24-inch diameter outlet riser pipe. Alternatively, you may remove floatables and hydrocarbons through the 6-inch oil inspection port.
The requirements for the disposal from Stormceptor are similar to that of any other Best Management Practice (BMP). Consult local guidelines or your Stormceptor Area Marketing Manager prior to disposing the separator contents.
The Submerged Stormceptor has been successfully installed in coastal areas and other submerged pipe conditions.