Builders Merchants Journal – BMJ Publishing to Builders Merchants and the UK merchanting industry for more than 95 years
The new StormTech SC-800 arch-shaped chamber from Advanced Drainage Systems, holds more water than the company’s SC-740, and requires less embedment stone for installation, offering a reduced minimum cover depth, greater storage capacity and reduced construction time and cost.
The SC-800’s corrugated design pares down the minimum cover depth and provides superior structural integrity. The StormTech arch-shaped system directs first flush flow into the patented Isolator Row – an integral water quality treatment device that has two treatment stages: sedimentation and filtration.
Isolator Row is independently tested and validated to remove more than 80% Total Suspended Solids (TSS), often avoiding the need for a costly sediment removal system upstream of the tank. Isolator Row can also remove other pollutants such as particulate-bound hydrocarbons and metals.
Another two treatment stages can take place within the embedment stone: adsorption and biodegradation, leading to even greater removal efficiencies. Isolator Row is the only part of a StormTech system that needs maintenance, as the other chambers only receive ‘clean’ untreated runoff from flows exceeding the first flush flow rate.
StormTech’s arch design sheds load from the chamber to the surrounding stone, which forms a structural arch that transfers loads into stone columns between the chambers and spreads the load through to the native soil, resulting in extraordinary minimum and maximum cover depths. The new SC-800 chamber has a minimum cover depth of 375mm. All StormTech standard installation details are based on HGV traffic loading.
The design of StormTech chambers means that the units can be stacked, taking up a minimum of space for transportation, storage and to speed-up installation.
