Environment Agency BAT Permit Guidance: UK Compliance Explained

• Best Available Techniques (BAT) are the best methods for preventing or minimising industrial emissions and environmental impacts, mandatory for 'installations' in the UK.
• BAT includes technology, design, operation, and decommissioning, with specific requirements detailed in BREF notes and legally binding BAT Conclusions (BATC) documents, including BAT-AELs.
• Environmental permits either specify BAT or set emission limits based on BAT, requiring operators to demonstrate compliance or propose alternatives in their application.
• Applicants can propose alternative BAT techniques, but must prove equivalent environmental protection or justify non-equivalence through a cost-benefit analysis for a derogation.
• Derogations from BAT-AELs are only granted if compliance costs are disproportionately high compared to environmental benefits, due to specific geographical, environmental, or technical reasons.

A permit will only be granted for activities that do not fully comply with BAT-AELs if an applicant can demonstrate that the costs of achieving full compliance are disproportionately high when weighed against the environmental benefits, citing a specific, justifiable reason.

Best Available Techniques (BAT) represent the most effective and advanced methods available for preventing or significantly reducing emissions and their overall impact on the environment. These techniques are a fundamental requirement for any operation classified as an 'installation,' encompassing a wide range of industrial processes such as refineries, food factories, and intensive agricultural farms. The term 'techniques' is broad, covering not only the technology employed but also the entire lifecycle of an installation, including its design, construction, ongoing maintenance, operational procedures, and eventual decommissioning.

The European Commission has historically published BAT reference documents, known as BREF notes, which detail these techniques for various installations. Any BREF notes issued before January 1, 2020, remain applicable within the United Kingdom. Furthermore, the European Commission has also released 'BAT conclusions' (BATC) documents, which carry legal weight and establish specific requirements that operations must meet. These BATC documents outline the Best Available Techniques and include associated emission limits, known as BAT-AELs, which are legally binding. Compliance with these BAT-AELs is a mandatory requirement unless the Environment Agency explicitly agrees that specific criteria have been met by the operator.

Environmental permits issued in the UK are intrinsically linked to BAT. Permit conditions may either explicitly state the specific Best Available Techniques that an operator must implement, or they may establish emission limit values (ELVs) and other environmental outcomes that are predicated on the application of BAT. For activities where a permit mandates adherence to BAT or 'appropriate measures' to achieve a particular outcome or ELV, operators are directed to consult the relevant activity guide, which provides detailed information on the applicable BAT for that process.

In instances where a permit does not explicitly specify the BAT to be used, the onus falls on the operator to determine and apply the appropriate techniques. Beyond the core BAT requirements, operators may also find it necessary to implement additional measures to ensure full compliance with all conditions stipulated in their environmental permit. This comprehensive approach underscores the importance of robust environmental permit BAT compliance.

When applying for an environmental permit, applicants must clearly articulate how they intend to comply with each applicable Best Available Technique, or alternatively, propose an alternative technique. This detailed explanation must be provided within the 'operating techniques' section of the application form. If an applicant plans to follow a specific BAT, they must explain the implementation strategy or how it will achieve the required environmental outcome or ELV. Should an applicant choose not to follow a prescribed BAT, they must propose an alternative technique.

If the proposed alternative technique offers an equivalent level of environmental protection to the standard BAT, the applicant must demonstrate this equivalence within the operating techniques section. However, if an alternative technique does not provide equivalent environmental protection, but the applicant wishes to argue for its justification based on cost-benefit considerations, a detailed justification is required. A permit will only be granted for activities that do not fully comply with BAT-AELs if an applicant can demonstrate that the costs of achieving full compliance are disproportionately high when weighed against the environmental benefits, citing a specific, justifiable reason. These permissible reasons include the geographical location of the installation, unique local environmental conditions, or the specific technical characteristics of the installation itself. This process is formally known as 'applying for a derogation.' To assist with the necessary cost-benefit analysis for such proposals, the Environment Agency provides a dedicated Industrial Emissions Directive derogation: cost-benefit analysis tool. For specific guidance, operators in England should contact the Environment Agency, while those in Wales should reach out to Natural Resources Wales, and in Scotland, the Scottish Environment Protection Agency.

The regulatory landscape for Best Available Techniques in the UK has evolved to ensure robust environmental protection. From January 1, 2020, the UK began producing its own BATC documents, which hold the same legal standing as the European Union's BATC. These UK BATC documents are crucial for Environmental permit BAT compliance, providing clear guidelines and requirements for industrial installations.

To ensure consistent application and interpretation of these complex regulations, UK regulators have collaboratively developed cross-cutting BATC interpretation guidance. This guidance is designed to assist operators and regulators alike in implementing BAT effectively and in resolving common issues that may arise during the interpretation of both BREF notes and BATC documents. This framework underscores the UK's commitment to maintaining high environmental standards through the rigorous application of Best Available Techniques.

Source: Original reporting via GOV.UK guidance