Whether it is for a new-build project or updating an existing sewage plant, our MPC team are familiar with the specific parts of the Buildings Control requirements that are relevant to typical off-mains-drains project work for both domestic and commercial use.
There are also General Binding Rules to consider and you may require a permit to discharge prior to obtaining building regulations.
To ensure compliance MPC Services can support you in these applications by identifying with you whether you can connect to mains, release to the ground, or release to a surface water, for example a river or stream.
Releasing to a surface water the Building Regulations Drainage and Waste Disposal H document states:
- You must use a small sewage treatment plant. You must apply for a permit if you are discharging more than 5 cubic metres (5,000 litres) per day
- All works and equipment used for the treatment of sewage effluent and its discharge must comply with the relevant design and manufacturing standards
- The system must be installed and operated in accordance with the manufacturers specification
- Maintenance must be undertaken by someone who is competent
- No rainwater must be allowed to enter the system
- A sample chamber must be installed after the outlet of the tank and before the final discharge point.
Your treatment system must be large enough to handle the maximum amount of sewage it will need to treat. We can calculate how much sewage you discharge to determine the size of the treatment plant you need for your property/business. This information along with drawings and the technical specifications of the selected sewage treatment plant and associated pipework is required as part of the Building Control application. If the packaged treatment plant requires power to operate it should be able to adequately function without power for upto 6 hours or have an uninterruptable power supply
Siting a new system - there are strict rules where sewage treatment plants and if required where drainage fields are sited.
A sewage treatment plant must be sited:
- 7 metres from a habitable property
- 2 metres from the boundary
- 10 metres from a watercourse.
Building Regulations Drainage and Waste Disposal H document states that a drainage field serving a sewage treatment plant should be located:
- At least 10m from any watercourse or permeable drain
- At least 50m from the point of abstraction of any ground water supply and not in any Zone 1 groundwater protection zone
- At least 15m from any building
- Sufficiently far from any other drainage fields, drainage mounds or soakaways so that the overall soakage capacity of the ground is not exceeded.
- The disposal area should be downslope of groundwater sources
- No water supply pipes or underground services other than those required by the disposal system itself should be located within the disposal area.
- No access roads, driveways or paved areas should be located within the disposal area.
- The water table or bedrock must not at any time, be within 1 metre of the bottom of the drainage pipe itself.
- The maximum depth allowed for drainage field pipework is 70mm
- The maximum length of a single pipe run is 30 metres
We already have relationships with the relevant agencies across the UK and if you wish we can manage the applications on your behalf as part of your installation project.