Contaminated Land in Southampton: Planning Support with Pollution Issues

Everything you need to know about contaminated land in Southampton

Managing contaminated land to create benefits for the city is a priority for Southampton City Council. The area’s industrial past has left a legacy of contaminated areas, and the council is working to ensure public health and environmental safety are foremost while promoting sustainable development on these sites.

We investigate the city’s historical sources of contamination and look at how the council manages polluted land, before outlining the correct steps to take when redeveloping such sites.

Southampton’s industrial legacy and contamination issues

Southampton has been home to a shipbuilding industry, chemical manufacturing and operated as a busy port. All these uses have resulted in areas of contaminated land: common contaminants include heavy metals, hydrocarbons and solvents.

Southampton City Council’s approach to contaminated land

The council works to identify and assess these sites to mitigate potential risks via a systematic approach:

• Inspection and identification: Regular inspections are carried out to identify potentially contaminated sites, prioritising those posing the highest risk to public health and the environment.
• Contaminated Land Register: A public register is maintained, documenting sites designated as contaminated under Part 2A of the Environmental Act 1990. This ensures transparency and public awareness of contaminated sites.
• Guidance for developers: The council provides detailed guidance for developers planning to build on land that may be contaminated, ensuring safe practices.

The risks from disturbing contaminated land

Fresh development on a contaminated site can create new pathways for pollutants to spread. This could potentially affect human health, watercourses and ecosystems. The severity of risk depends on the following three factors being present. Without all three, the threat is minimal.

• A source of contamination.
• A pathway: a channel for contamination to spread.
• A receptor such as people or the environment.

Developing on contaminated land in Southampton

If you’re considering developing a contaminated site in Southampton in the south of England, a contaminated land risk assessment will be required before planning permission will be granted. If contamination is identified, the assessment report will provide details of the remediation work needed to allow the project to continue.

Site investigation services are conducted by geo-environmental consultants working to the Environment Agency’s Land Contamination Risk Management guidelines. Identifying an expert team of consultants offering a full range of services on the south coast will give you access to cost effective solutions.

The Contaminated Land Risk Assessment:

1. Pre-application consultation: early engagement with the council’s planning department will clarify potential contamination issues and the assessments required prior to planning applications being considered.

2. The Phase 1 desk study and preliminary risk assessment. During this first step, a consultant will carry out an analysis of the site’s history, referring to historic maps, industrial records and landowners. A preliminary risk assessment will identify potential contaminants.

3. The Phase 2 site investigation. Investigations will include soil, surface water and gas sampling. The work may involve digging trial pits to monitor ground conditions. Consultants may use a conceptual site model to give an overall picture of the area.

4. Risk assessment. From the data collected, consultants calculate the site’s potential risk factors and any need for remediation.

5. Remediation strategy:  A plan will be drawn up to clean up identified contaminants and make the site safe. Methods involve removing contaminated soil off-site for cleaning, or capping areas to prevent exposure.

6. Validation and reporting: Following the remediation process, evidence must be provided to the council to prove that all safety and environmental standards have been met.

Legal requirements

The management of contaminated land in the UK is governed by Part 2A of the Environmental Protection Act 1990, which defines contaminated land as any site where substances on or beneath the ground present significant risks to health or the environment. This legislation requires local authorities to identify and remediate such land.

Key principles include:

• Taking a risk-based approach: An assessment is made on the likelihood of harm to people, water supplies and the environment.
• `Polluter Pays’: The party responsible for the contamination must deal with its remediation, where possible.
• Development-led remediation: Contaminated land is assessed and cleaned up as part of future development through the planning process.

Additionally, the National Planning Policy Framework (NPPF) notes the importance of restoring and reusing previously developed land. Paragraph 197 of the NPPF states that the safe development of contaminated land is the responsibility of the developer, landowner, or both. The NPPF includes a statutory duty for local authorities to monitor sites and manage contamination risks.

Why reuse contaminated land?

The main reasons are:

• Focusing on redeveloping brownfield sites (previously developed land) means less building on greenfield sites.
• Creating housing and jobs on previously used land in urban areas means that they are accessible to many people, making sites sustainable.
• Cleaning up contaminated land reduces pollution risks and improves local ecosystems.

Promoting redevelopment of brownfield sites

Southampton City Council is committed to the reuse of brownfield sites to reduce pressure for building on greenfield areas. The council maintains a Brownfield Land Register, identifying sites suitable for residential development. Notable projects, such as the WestQuay Watermark development, demonstrate the city’s dedication to turning former industrial sites into thriving communities.

Regenerating land creates a better city

Southampton City Council’s approach to managing contaminated land ensures that development within the city is both safe and sustainable. The transformation of historically contaminated sites into valuable assets for the community aligns with broader goals of urban regeneration and environmental improvement.