An interceptor is essentially a large trap that is installed within an underground water system network to filter pollutants from runoff before they enter a watercourse or stream. Typically, they are installed where there is a lot of surface overflow e.g. car parks, loading yards and commercial buildings.
Although most runoff is predominantly water that results from weather conditions such as rain or snow, there are many factors that can alter the amount or content of the spill being filtered through interception systems.
There are several things that can impact runoff, typically from where the run off is coming. For example a large car park or commercial yard can have substantial traffic film, oils or other chemicals a vehicle may have attached to it.
Interceptors and water attenuation tanks are typically manufactured in plastic or GRP