Design Guide
Page 18
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05/15
7.0
Stormwater Flow into Chambers
There are numerous ways of routing the stormwater from a developed site into the HydroStor chambers.
Considering chambers have open bottoms, it is essential to utilize a pretreatment system to remove
sediment and debris before the influent enters the chamber system. Below is some guidance on
alternatives for the treatment of the inlet flow. Should more assistance be required, please contact your
local Prinsco representative.
7.1
Retention/Detention and the Treatment Train
In addition to the retention / detention of stormwater, one of the functions of an underground
system is the treatment of stormwater for water quality. When properly designed the HydroStor
system can be combined with other stormwater treatment devices to provide a multi-tiered
treatment approach for water quality, creating a very effective treatment train. The treatment train
can consist of up to three levels of treatment for stormwater entering the HydroStor system
including the following:
Pre-Treatment Systems
HydroStor Sediment Row
Enhanced Stormwater Treatment
7.2
Pre-Treatment Systems
Depending on the location of the project, pre-treatment may be required prior to the stormwater
entering the system. A pretreatment device can be used to reduce the pollutant load entering the
system. By reducing the load entering the system, the service life of the system can be extended
and sediment as well as other pollutants can be captured helping to meet local regulations.
The types of pretreatment systems can differ in method and effectiveness. A pretreatment devise
such as Prinsco’s Stormwater Quality Unit (SWQU) treats the initial stormwater runoff before it
reaches the chamber system. (Figure 9) Several standard units are available. Custom units, based
on job specific requirements, can be manufactured. Refer to Prinsco’s SWQU Product Detail &
Bypass detail or contact your local Prinsco representative for more information.
Summary of Contents for HydroStor HS180
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