Air Guidance Documents

EPA Air Related Guidance Documents

The Environmental Protection Agency produces a wide range of guidance documents which are intended to support the holders of EPA licenses.  These guidance documents provide information to operators, to assist them comply with their legal requirements and the Conditions set out in their license.  A list of all the air related EPA guidance documents is also available to view.


Air Guidance Notes

The Environmental Protection Agency has also developed 9 specific Air Guidance Notes (AG1 - AG9).  These Guidance Notes provide specific information on a range of topics such as Odour Assessments; Air Dispersion Modelling; and  continuous emissions monitoring at Large Combustion Plants.  These specialised guidance notes are designed to provide specific guidance on topics of interest to EPA Licensed facilities.  A summary of each Guidance Note is outlined below.

  • Guidance Note on Site Safety Requirements for Air Emissions Monitoring (AG1) provides details of the basic physical requirements of the sampling location to ensure that representative measurements can be carried out in a safe manner.   The Health and Safety aspects of stack testing must always receive priority.
  • The primary reference source on the approach to be taken in carrying out emissions monitoring is the EPA Air Emissions Monitoring Guidance Note (AG2).  This guidance provides a comprehensive description of the elements required to ensure good quality monitoring data, including planning for a monitoring campaign, the methods to be used AG2 Index of Preferred Methods personnel competency requirements, and reporting requirements.  All licensees with significant emissions to atmosphere should be familiar with this guidance and should be requesting monitoring contractors to carry out sampling, analysis and reporting in line with the requirements of the guidance.  
  • Air Guidance Note on the Implementation of I.S. EN 14181 (AG3) relates to quality management of continuous emissions monitoring equipment installed at Large Combustion Plant (LCP) and Waste Incineration Plant (WIP), but elements of this guidance can also be successfully applied to ensure high quality data is obtained at other sites using continuous emissions monitoring systems.
  • Air Dispersion Modelling (AG4); Best practice guide on completion of air dispersion modelling investigations.
  • Odour Impact Assessment Guidance Note for EPA Licensed Sites (AG5) offers a consistent and systematic approach to the assessment of odours on and in the local area of facilities and installations that are licensed by the Agency. It is intended for use by licensee’s to assess their state of compliance with odour related license conditions and to investigate odour complaints received.
  • Surface VOC Emissions Monitoring on Landfill Facilities (AG6). The Agency advises licensees to have regard to this guidance when undertaking or outsourcing any work relating to VOC emissions from landfill surfaces.
  • Guidance Note on Landfill Flare and Engine Management and Monitoring (AG7) This guidance has been developed to assist waste licensed sites in the management and monitoring of landfill gas flares and engines emissions.  It is designed to provide the relevant knowledge and guidance to licensees and their emission monitoring contractors.
  • Air Guidance Note for In-house Air Monitoring Teams (AG8) is intended to assist in house air monitoring teams to develop a Quality Management System (QMS) modelled on ISO 17025 that should meet the Agency’s minimum requirements for in-house air monitoring.

  • Odour Emissions Guidance Note (AG9) Odour Emissions Guidance Note aims to provide clear and robust methodologies for industrial and waste facilities in terms of odour abatement solutions that can be implemented to reduce or eliminate odour. The document sets out recommended approaches for the development of odour management plans, abatement strategies and test programmes and should allow for improved consistency and reliability in addressing odour at industrial and waste facilities.
  • Guidance Note on EPA requirements for calculation of flue gas volume flow rate from energy consumption using Annex E of ISO EN 16911-1 (AG10).  This guidance note aims to clarify the requirements of Annex E of EN ISO 16911-1 Stationary source emissions – Manual and automatic determination of velocity and volume flow rates in ducts. The EPA has provided this guidance for organisations to reference when calculating flue gas volume flow rate from energy consumption. This guidance is aimed at organisations in the large combustion plant and waste incineration sectors, which are licensed by the EPA.
  • Guidance Note on monitoring of Stack Gas Emissions from Medium Combustion Plants: Air Guidance No. 11 (AG11).  This guidance note has been produced to provide a standardised approach to monitoring stack gas emissions from plants regulated under the Medium Combustion Plant Directive (MCPD).
  • Guidance Note on EPA requirements for Alternative Monitoring when Continuous Emission Monitoring Systems are off-line (AG12). This guidance note aims to clarify the alternative monitoring options, which should be considered by licensees, when automatic monitors for air emissions are not operational, and the licensee proposes to continue operations at the site, which will lead to emissions to atmosphere, via the relevant emission points.

Noise Guidance Notes

Other Sources of Guidance/Information

The Source Testing Association (STA) is a technical trade association for companies involved in air emissions monitoring, including stack testing contractors, equipment suppliers, and process operators.  The STA also offer a range of training courses.

UK Guidance Documents

  • The UK Environment Agency has published a range of guidance documents on air emissions monitoring which can be accessed at Environment Agency UK.
  • This includes guidance on periodic and continuous air emissions monitoring as well as ambient air monitoring.
  • The UK Environment Agency has also published Method Implementation Documents (MIDs) which present the EAs interpretation of how the various standards for emissions monitoring should be implemented.
  • A number of quick guides on emissions monitoring topics are also available from the Environment Agency UK website.