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The Government announced in January that it intends to implement Schedule 3 of the Flood and Water Management Act 2010 (FWMA) in England.
This will accelerate the adoption of SuDS and enforce mandatory standards and statutory requirements for the planning, design, construction,
and maintenance of SuDS assets.
Designers and installers will now need to understand how those standards apply to various types of above- and below-ground stormwater
attenuation systems, and decide which is the optimum system for any specific installation. Whilst structural performance, material, design,
manufacture, installation, and maintenance will all effect the integrity and durability of a proprietary below-ground attenuation system,
without a 'golden thread' running through the process, optimal performance can be compromised. Whilst attenuation methods such as large
diameter pipes and crates depend on the installation of ancillary treatment systems to achieve optimal performance, the ADS StormTech
system can provide a more complete solution for below-ground SuDS.
Water Quality
There is generally no water quality treatment capability within crate or pipe systems. Additional sediment and pollution removal is normally
required as part of the treatment train. This not only requires additional capital investment, often costing £000s per unit, there is
a potential operational cost in terms of inspection and maintenance for each of the additional devices.
StormTech has a multi-stage in-built water quality treatment device called Isolator Row that is independently tested and validated to
remove over 80% Total Suspended Solids (TSS). Often, this means that no additional sediment removal provision is required. It can also mean
that additional treatment devices for the removal of metals and hydrocarbons are not required. Isolator Row can also mitigate against
particulate Phosphorus and Nitrogen nutrient loading from stormwater runoff.
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