Call for sites - Enhance your Tank Scheme

Esthwaite

Introduction

A partnership comprising Cumberland Council, the Lake District National Park Authority, Westmorland and Furness Council and the Yorkshire Dales National Park Authority are working together to try and address the issue of nutrient neutrality across Cumbria. We have launched the Enhance your Tank scheme to help deliver mitigation solutions to unlock homes affected by nutrient neutrality.

12th September 2024 update: The deadline for submitting Expression of Interest forms for the Enhance your Tank scheme has been extended to Friday 14th December 2024.

17th September 2024 update: Guidance has been received from Natural England regarding small scale discharges to ground. Existing septic tanks and package treatment plants that meet the General Binding Rules for small scale discharges to ground can be accepted onto the scheme and used for mitigation if they meet  any one of the following:

  • The drainage field is less than 50m from the designated site boundary, OR
  • The drainage field is less than 40m from any surface water feature e.g. ditch, drain, watercourse, OR
  • The drainage field is in an area with a slope greater than 15%, OR
  • The drainage field is in an area where the high water table groundwater depth is less than 2m below the surface at all times, OR
  • The drainage field is in flood zone 2 or 3, OR
  • The discharge to ground is less than 200m from any other discharge to ground.

Current small scale discharges via a PTP to surface water are already discharging nutrients directly into a watercourse and therefore there are no criteria to meet for them to be eligible for an upgrade. However if a septic tank is discharging to surface water this legally should have been upgraded by 2020 and therefore will only be able to generate credits over and above a standard legal PTP level of discharge.

If you are unsure whether your system meets the criteria, you may wish to submit an Expression of Interest and we will work with you to identify whether it does (depending on the availability of funding and the location of the site).

Enhance your Tank Scheme - Guidance Note

What is the problem?

Nutrient Neutrality (NN) was introduced into Cumbria in March 2022. Its purpose is to offset the impacts of new development which can increase the levels of nutrients entering watercourses through surface and foul water. Excess nutrients can cause water pollution which leads to algal growth and eutrophication in our lakes, rivers and streams. This has negative effects on the species living within them.

Nutrient Neutrality restrictions are in place in areas where Habitat Sites are in an unfavourable condition due to nutrient pollution. The following Habitat Sites are in an unfavourable condition due to phosphorus:

  • River Eden SAC
  • River Derwent and Bassenthwaite Lake SAC
  • River Kent SAC
  • Esthwaite Water Ramsar

Developers are required to identify mitigation within the affected catchment area to offset any impacts before their planning application can be approved. Solution need to be upstream of the point where the development discharges into the waterbody.

A significant number of new homes, including affordable housing, are currently held up in the planning system while solutions are being found.

A Partnership has been set up to help identify potential solutions and address the issue; members include Cumberland Council, Lake District National Park and Westmorland and Furness Council amongst others. Identifying solutions will help developers deliver much needed homes across Cumbria.

What is the solution?

  • One mitigation solution, supported by Natural England, is to replace existing inefficient septic tanks and package treatment plants with improved systems in order to reduce the amount of phosphorus entering the SAC catchment. The replacement system has to be located upstream of the development it mitigates and must be in the same catchment.
  • The aim of this Call for Sites is to identify potential septic tanks and PTPs that can be upgraded within the affected catchments.
  • A septic tank is a primary treatment system in which solids settle to the bottom and decompose whilst the wastewater is discharged into the ground through a drainage field or soakaway. Solid waste is then collected and taken away.
  • PTPs are effective a modern, more efficient septic tank. They generally require an electrical connection but take up less space, require less emptying and are generally more efficient in terms of removing nutrients from wastewater. They do however need to be maintained as advised by the manufacturer. PTPs can be discharged into soakaways, surface water, groundwater or drainage field.

What is the Enhance your Tank Scheme?

Septic tank and PTP owners are able to submit details of their septic tanks/PTP through an Expression of Interest form. Once an estimate of how much phosphorus could be saved through replacing the system has been made the Partnership will then:

  • Match the landowner up with an interested developer who is looking for solutions to unlock their development. The developer will then work directly with the landowner. The developer may either pay for the replacement and bank to credits to use for their development or come to an alternative arrangement with the landowner. This route is not reliant upon public funding and is therefore likely to deliver replacements quickly.

and/or

  • Work with the landowner and a third-party contractor to replace the system free of charge, where funding becomes available. The Partnership will then “bank” the phosphorous (P) savings as nutrient credits which it will then sell to a developer to allow them to deliver new housing. The number of systems that can be replaced will depend upon the amount of funding available and the Partnership will prioritise those replacements which will generate the highest P savings.

Where the existing system doesn't meet current standards, the baseline figure used in the nutrient calculators will be used when calculating the potential P savings which could be made.

The number of systems that can be replaced and the timescales for replacement is dependent on the amount of funding available to the Partnership at the time. Replacements which will generate the highest P savings to unlock the most homes will be prioritised.

Can Small Scale Discharges be considered?

Where the discharge from the existing septic tank/PTP meets the definition of a small scale discharge it may still be considered for replacement through this scheme. Please see the latest update on the top of this page.

Small scale discharges are those which:

Discharge to the ground - systems that discharge 2 cubic metres or less per day General Binding Rules: Small sewerage discharge to the ground

Discharge to a surface water - systems that discharge 5 cubic metres or less per day General Binding Rules: Small sewerage discharge to surface water

The following simple calculator can be used to find out discharge rates from septic tanks and PTPs linked to domestic properties: Discharge Calculator

How do I get involved?

  • If the existing septic tank/PTP is within an affected catchment, the owner is able to submit an online expression of Interest form
  • Hard copies of the form are available on request; if submitting a paper form it must be accompanied by a map clearly showing the location of the system and the site.
  • Please note that submitting an EOI does not commit the owner or any of the partnership local authorities to take any further action and does not enter the parties into any form of agreement.
  • Completed Expression of Interest forms must be submitted by Friday 14th December 2024.

Expression of Interest form

What happens next?

  • You will be emailed a receipt to confirm that your submission has been received.
  • The partnership will carry out an initial, high level screening assessment.
  • The partnership, taking the owner’s wishes into account, will determine the appropriate next steps from the two options set out above in the “What is the Enhance Your Tank Scheme” section.
  • The partnership will make contact with you to discuss the next steps. Please note that contact may not be made until the end of 2024 depending on the number of submissions we receive and the availability of funding.

What if I need assistance completing the form?

  • For any further information regarding the scheme please contact Leanne Parr, Catchment Nutrients Officer at leanne.parr@lakedistrict.gov.uk.