How do you maintain your bunded areas?

If you had a major leak within your bunded area , is there capacity within the bund to contain the contents?

Every year there are over 5,000 pollution incidents involving oil and fuels, the effects can be devastating for both the natural environment and the source of the leak. Two of the most common causes for these disasters are insufficient storage and bunded areas.

A bund is a secondary containment area that is constructed around oil (or chemical) storage facilities to prevent leaks and spills polluting watercourses. Bunds need to be watertight to be effective and therefore bunded areas will collect rainwater, which becomes polluted by the normal day-to-day drips from the storage facility. The polluted rainwater must be removed in an environmentally safe manner so that the bund retains its full capacity to contain a major spill and avoid an oil pollution incident.

Aquasentry’s Bund Water Control Unit acts as a de-watering system for areas where there may be a build up of rain water mixed with oil residues. It works by detecting the difference between oil & water and pumping away the water into the surface water drainage system or a soak away. It removes water from sumps at a rate of 145 litres/min, enabling a discharge rate of <5mg of oil per litre (5 parts per million), making the Bund Water Control Unit safe and effective to use.

The unit uses conductivity probes to determine the nature of the liquid within the sump and automatically activates the pump to remove the water.  Once the water has been removed and only oil remains the pump will cease.  This allows for economical and effective waste removal and will have the added benefit of reducing your disposal costs whilst protecting the bund from disintegration.

The unit works 365 days a year, 24 hours a day to keep your bunded area in good condition, dry and free from oil contamination.

The units are situated in a range of applications from sub stations to oil bunds to underground lift shafts and are available to be used within zoned areas.

The Bund Water Control Unit ensures that your bunds retain 110% capacity as stated within PPG 2. Aquasentry’s Bund Water Control Unit is a cost effective de-watering solution providing you best practice for the environmental management of your bunded areas.

Frequenty asked questions

What voltages can the units/pumps be supplied in?

  • Either 240v or 110v.

How often does the Bund Water Control Unit monitor the probes?

  • The probes are constantly monitoring 365 days a year on a 24/7 basis to provide complete protection from oil leaving the sump.

What are the minimum dimensions of the sump that can ensure optimum functionality?

  • The minimum requirement is 600mm x 600mm x 600mm but the ideal size is 900mm x 900mm x 900mm or larger.

How does the probe discriminate between oil & water?

  • Via a conductivity probe set which detects a film of oil and activates a float switch.

What is the maximum distance for locating the pump from the control panel?

  • We would recommend less than 200 metres, however more bespoke systems can be made to suit greater distances. The majority of units are installed with less than 10 metres of cabling.

What is the extraction flow rate of the pump(s)?

  • On a doc 3 pump, it is approximately up to 135 litres per minute providing the head is less than 3m. On a doc 7 pump, it is 240 litres per minute up to 7 metres.

How many pumps can be run off one control panel?

  • A standard panel will support two. This requires two boards within the enclosure and it alternates the pumps.

How long does it take to install a Bund Water Control Unit?

  • Usually, we would carry out a standard install of a unit in a single day subject to the cabling, power supplies and tray work being in place.

Do you have explosion proof pumps?

  • Yes - we are able to supply EX pumps as well as Intrinsically Safe systems which are essential within zoned areas.

What is the difference between the two pumps?

  • The flow rates and the distance which they can pump out differ. The Doc 7 has a capacity for faster flow and higher heads.

Can the Bund Water Control Unit only discharge into a drainage system?

  • It is advisable to pump into a drainage system which goes to an interceptor but the unit does pump at less than 5 parts per million.

Is a visual or audible alarm required?

  • Not by the Pollution Prevention Guidelines, however, a beacon can be fixed to the unit if required. Our latest model also offers the optiion for a text alert via its GSM module.

Does the de-watering system need regular servicing?

  • Yes - we would recommend a minimum of an annual service but six monthly is the practical norm within businesses.

Key Attributes

  • Automated bund dewatering

  • Alarm activation

  • Automatic monitoring

Key Benefits

  • Retain bund capacity

  • Notification of potential pollution incident

  • For remote locations

Get in touch with one of the team to discuss your requirements

Get in touch with one of the team to discuss your requirements

© AQUASENTRY 2019 All Rights Reserved all 3rd party trademarks acknowledged.
AQUASENTRY, a company registered in England number 02014000.
The registered office of the company is, AQUASENTRY, Brook House, Larkfield Trading Estate, New Hythe Lane, Larkfield, Kent ME20 6GN