Drainage mapping
We help you to understand the layout and condition of your drainage, ensure compliance, and reduce the risk of pollution with our drainage mapping service.
Having an up-to-date drain plan in place is critical for effectively mitigating the environmental risks associated with your site. Drainage systems have the potential to swiftly transport pollutants off site which could result in an environmental compliance breach.
- The foul will travel to a treatment works either under gravity or via a pumping / lifting system.
- The surface will enter the water course at some point.
Do you have records relating to the drainage assets within your site?
Do you know where your drainage exists on your site, and whether it connects to other infrastructure, ie public system(s) combined sewer, or separate foul and surface system?
If you do not have this information to hand, you could be risking prosecution. If you pollute, you could get an unlimited fine, go to prison for up to 5 years, or both. You may also have to pay for the whole cost of the clean-up. We know the law and can help you comply with it.
Pollution prevention guidance
https://www.gov.uk/guidance/pollution-prevention-for-businesses
Pollution Prevention Guidance states you must have a drain plan. It is important to make a plan of your drains to help you use them correctly, carry out maintenance and deal more effectively with pollution if there’s a spill, leak or other incident. The plan should show:
- where the drains are
- the types of drains - surface water, foul water, or combined
- direction of flow
- where drains leave your property
- where they discharge into, for example, a watercourse, clean-water soakaway or sewage treatment works
Everyone who works at the site should be able to easily find and understand the plan.
If you make changes to your site, you should check your drain plan to make sure you do not connect to the wrong drains and update your plan with the changes.
Benefits of a drainage map
- Location and direction: Understand the locations and directional flow of both your surface water, foul water and combined drains
- Exit and high-risk: Understand where your drainage system exits the site so you can identify the high-risk areas
- Other underground assets: Identify any other underground assets such as separators, attenuation tanks, pump station and inspection chambers
- Condition identification: Understand the condition of your drains ensuring any defects are identified to enable remediation works
- Manage pollution risk: Understand and manage the risks of a pollution incident
- Comply: Ensure compliance with the government pollution prevention guidelines
Following our visit to site you would receive:
- Drainage map / connectivity survey
- CCTV condition survey / report
- Cost recommendations for remedial works including a remedial quote
Our services
Our CCTV team can attend and survey your site with or without a jetting crew.
If the system is dirty then jetting should ensure we can survey most lines unless there are collapses, or major displaced joints, roots, foreign objects etc.
The CCTV survey would be used to grade any defects in the system.
- Topographic survey - Provides details of other services and features located on site with exact locations and heights mapped - this is offered via a subcontractor.
- GPS Logging - Provides GS locations of manholes.
- Sonde Tracing - Where a pipe does not travel in a straight-line manhole to manhole, we can plot the route using a sonde.
To ensure ongoing compliance on your site, following the CCTV survey and drainage mapping exercise we recommend establishing a regular planned preventive maintenance contract (PPM).
First, we would bring the system into a condition that operates efficiently, reducing the risk of downtime on site, or a pollution incident happening. This could include:
- Root cutting
- Further cleaning of deposits
- Localised repairs through patching
- Lining to "renew" the asset without the need for excavations
- Repairs via excavations where required
- Installation of non-return valves, pumping stations or separator (fuel / grease etc).
We would highlight any identified risks, for instance:
- any misconnections where foul is entering the surface system
- anywhere that could allow a pollutant to enter the drainage system (poor asset management on other storage assets etc)
We would suggest a reasonable timeframe for regular PPM works which we can undertake, for example:
- interceptor cleaning / inspection
- pump station servicing
- septic tank draining
- gully cleaning
Understand the layout and condition of your site’s drainage system.
Contact us today to book your drainage mapping assessment.
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