Sedgemoor District Council
2017 Air Quality Annual Status Report (ASR)
In fulfilment of Part IV of the Environment Act 1995 Local Air Quality Management
Date (June, 2017)
LAQM Annual Status Report 2017 Sedgemoor District Council
Local Authority Simon Carpenter Officer Department Environmental Health Sedgemoor District Council Bridgwater House King Square Address Bridgwater Somerset TA6 3AR Telephone 01278 435725
E-mail [email protected] Report Reference ASR_2017_V1 number Date June 2017
LAQM Annual Status Report 2017 Sedgemoor District Council
Executive Summary: Air Quality in Our Area We all need air to breathe and we would all choose good air quality over poor. That’s quite plain and simple to understand, but there is more to why we all need to think about ways to improve air quality than you may think.
Addressing air quality matters because cleaner air is healthier for people and the environment, good air quality means less economic costs spent on fixing the damage caused by poor air pollution and good air quality makes places more welcoming to live, work and visit.
Air Quality in Sedgemoor
Air pollution is associated with a number of adverse health impacts. It is recognised as a contributing factor in the onset of heart disease and cancer. Additionally, air pollution particularly affects the most vulnerable in society: children and older people, and those with heart and lung conditions. There is also often a strong correlation with equalities issues, because areas with poor air quality are also often the less affluent areas1,2.
The annual health cost to society of the impacts of particulate matter alone in the UK is estimated to be around £16 billion3.
Sedgemoor’s District is located in Somerset and within the District is a mixture of both rural and urban environments which covers an area approximately 350m2. The population is approximately 111 000 people with the main centres of population being Bridgwater, Burnham-on-Sea, Highbridge and Cheddar. The M5 motorway runs longitudinally through the District and the North Western part of the district is bounded by the coast.
1 Environmental equity, air quality, socioeconomic status and respiratory health, 2010 2 Air quality and social deprivation in the UK: an environmental inequalities analysis, 2006 3 Defra. Abatement cost guidance for valuing changes in air quality, May 2013
LAQM Annual Status Report 2017 i Sedgemoor District Council
There are a range of potentially air polluting sources within the Sedgemoor area; these include industrial/commercial and traffic related. At the present time Sedgemoor District Council is proud not have any air quality management areas and the latest results from the Nitrogen Dioxide diffusion analysis shows a decrease at majority of sites, however at the following 9 of the 29 sites there has been a slight increase of annual mean concentrations (g/m3) on the previous year:
DT1: Carlton Drive, Bridgwater. DT2: Camden Road, Bridgwater. DT3: Penel Orlieu, Bridgwater. DT14: Mendip Road, Rooksbridge. DT17: Masons Way, Cheddar. DT22: Taunton Road, near Hamp, Bridgwater. DT26: Wembdon Road, Bridgwater. DT27: Quantock Road, Bridgwater. DT31: Taunton Road, near Browne’s Pond, Bridgwater.
Below provides a summary of the previous rounds of air quality review and assessment undertaken by Sedgemoor District Council. Copies of reports can be obtained from Sedgemoor District Council’s Environmental Protection Team or can be found on the SDC website http://www.sedgemoor.gov.uk/6044. At present Sedgemoor District Council does not have any AQMAs, nor does any of the current monitoring show the need to proceed to a detailed assessment.
Round of Review and Details Assessment and Date Undertaken
Potential exceedances of air quality objectives for Sulphur Dioxide as a result of emissions from a cellophane factory located in First Round: 1999 - 2003 Bridgwater. An AQMA was declared in February 2002.
An Action Plan was produced aimed at improving air quality within the AQMA. In 2005 the factory of concern closed and as a result the AQMA was officially revoked in August 2005.
Potential exceedances of Nitrogen Dioxide Annual Mean Air Quality Objective identified due to traffic sources along the Second Round: 2003 - 2005 Broadway and Monmouth Street in Bridgwater.
Detailed assessment undertaken in 2005 which concluded that no exceedances were occurring and therefore no AQMA was required.
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Third Round: 2006 – 2008 No potential exceedances identified and no AQMA’s required. No potential exceedances identified and no AQMA’s required. Fourth Round: 2009 – 2011
No potential exceedances identified and no AQMA’s required. Fifth Round: 2012 – 2014
2016 Annual Status Report No potential exceedances identified and no AQMA’s required. covering 2015 data No potential exceedances identified and no AQMA’s required. 2017 Annual Status Report New PM monitors are being researched for potential deployment covering 2016 data within the district.
EDF – Hinkley C nuclear reactor:
EDF Energy have started to build a new nuclear reactor close to the Sedgemoor district border. Whilst the main development is occurring outside of the Sedgemoor area, the majority of access routes are to be through Sedgemoor and in addition there are a number of associated development sites within Sedgemoor.
The developer is proposing to introduce measures to reduce traffic associated impacts and in turn negative air quality impacts. The conclusion from air quality studies carried out by EDF Energy are that no breaches of air quality objectives or standards will occur due to the proposed development works.
In preparation, Sedgemoor District Council has increased its spread and number of diffusion tubes for monitoring Nitrogen Dioxide to obtain good baseline data. Development of the various development sites has just started and future ASR’s will full cover any impacts from the development of associated sites and traffic movements associated with the project. The Council will need to closely monitor the key areas that may be affected by the development through the Local Air Quality management Process.
The developer EDF Energy is proposing to introduce measures to reduce traffic associated impacts and in turn air quality impacts. These are summarised below:
1) Limiting parking on site to reduce use of personal vehicles etc.
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2) Construction of two park and ride facilities and requiring workers to use these when commuting to the site. The Junction 23 Park and Ride facility at J23, off Dunball Roundabout is located close to the junction of the motorway so that vehicles other than park and ride buses do not need to travel into urban areas. The Junction 23 Park and Ride facility has a completion date programmed for 25th July 2017. EDF are also now in the process of commencing works on the Cannington Park and Ride site off the A39 on the ‘old bypass’ south of the village.
3) Construction of freight consolidation facilities so that all site deliveries are undertaken in an efficient manner. Multiple loads of freight will be bulked where possible into single transport loads. These centres are located close to the motorway junctions of the M5 so that all freight is consolidated before it goes into urban areas etc.
4) Construction of a bypass around the village of Cannington so that traffic is moved away from sensitive receptors. This has now been constructed and traffic is using the new Bypass.
5) EDF Energy has also undertaken work on air quality impacts as part of the application process. This has included utilising monitoring data, traffic data and air quality modelling work.
6) Road improvements including Wylds Road and The Drove which are discussed below:
There has recently been some major roadworks on Bristol Road and Wylds Road in Bridgwater which commenced in January 2017. Bristol Road is now open to two-way traffic and works are completed on The Drove / Bristol Road junction. However, work continues on The Wylds Road / The Drove junction so traffic lights remain at this junction and the movement from East Quay northbound is still banned until the works are completed. The junction work is expected to be completed by the end of June when all of the traffic management can be removed. These roadworks were part of the agreed schedule of improvements required for the construction of Hinkley Point C to ease congestion and improve drivers’ journeys through Bridgwater and improve crossing points for cyclists and pedestrians.
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During the roadworks there has been a temporary one way system in operation and this had caused some impact on the flow of traffic. Sedgemoor District Council has diffusion tubes for monitoring Nitrogen Dioxide on these stretches of roads and is currently researching into Particulate Matter monitors for potential use at traffic hot spots such as these in the future. PM10 is commonly associated with road dust with wear and tear of brakes and tyres on vehicles contributing to a rise in PM10.
Alternatively, PM2.5 can be associated with vehicle emissions.
A FAQs document, including information on other locations which provide greater and up to date detail on traffic, transport and highways in Sedgemoor, is available at the following link: http://www.sedgemoor.gov.uk/CHttpHandler.ashx?id=17810&p=0
Actions to Improve Air Quality
As above, there are currently no AQMAs in Sedgemoor’s district for air quality exceedances. However, Sedgemoor District Council will continue to work to improve air quality by monitoring NO2 levels, looking for processes without permits, considering air quality when commenting on planning applications and the feasibility of installing monitors to analyse particulate matter such as PM2.5 and PM10 at locations within Sedgemoor.
Conclusions and Priorities
The main conclusions from this year’s ASR is air quality in Somerset remains good with no potential exceedances identified and no AQMA’s required. The majority of
NO2 is decreasing, however there are a number of increases which will be closely monitored as will two new NO2 diffusion tubes sites which have been installed in Johns Street and Westonzoyland Road in Bridgwater.
Sedgemoor District Council takes air quality seriously and despite there being no incorporation of Particulate Matter monitoring into LAQM Regulations and therefore no statutory requirement to review and assess particulates such as PM2.5 and PM10,
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Sedgemoor District Council is researching particulate monitors with the potential to monitor traffic hot spots within the district.
With increased development in the district of Sedgemoor, and to address air quality in the future, the Environmental Protection Team at Sedgemoor District Council is reviewing planning conditions particularly regarding the need for assessment of air quality during construction and operational phases of large scale developments.
Local Engagement and How to get Involved
This is where you, the public can get involved. There are a number of new and old ways on how the public can improve air quality within Sedgemoor. Why not consider some of the following. You don’t have to make a sudden change, but perhaps a couple days over a week or just where you can, it all helps.
Reduce the amount you use your car. Do you have any friends or work colleagues who you can create a car sharing scheme with? Or,
For journeys less than 2 miles, walking would be ideal and especially when you think you walk approximately 2000 steps per mile, this all helps go towards achieving our recommended 10,000 steps a day.
Cycling is the least polluting way of travelling after walking, and as well as the fitness benefits, it can be twice as fast as driving through rush hour.
You might be able to go electric and produce zero emissions while still being able to drive.
Don’t burn your garden waste. This not only creates smoke and air pollution, but is likely to upset someone who has their windows open or washing drying outside. Instead you can compost it or take it to one of the three recycling centres in Sedgemoor are situated at:
Bridgwater - Saltlands Avenue, Chilton Trinity, TA6 3JG Cheddar - Wedmore Road, BS27 3EB Highbridge - Isleport Business Park, Bennett Road, TA9 4PW
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For all general enquiries, please contact the Somerset Waste Partnership or visit their website http://www.somersetwaste.gov.uk where you can get advice on home collections and information on free courses to help gardeners compost in confidence.
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Table of Contents
Executive Summary: Air Quality in Our Area ...... i Air Quality in Sedgemoor ...... i Actions to Improve Air Quality ...... v Conclusions and Priorities ...... v Local Engagement and How to get Involved ...... vi 1 Local Air Quality Management ...... 10 1.1 Background ...... 10 1.2 Narrow Congested Streets with Residential Properties Close to the Kerb 10 1.3 Busy Streets Where People May Spend 1-hour or More Close to Traffic 11 1.4 Roads with a High Flow of HDVs ...... 11 1.5 Junctions ...... 11 1.6 New Roads Constructed or Proposed Since the Last Round of Review and Assessment ...... 11 1.7 Roads with Significantly Changed Traffic Flows ...... 11 1.8 Airports ...... 12 1.9 Railways (Diesel and Steam Trains) ...... 13 1.9.1 Stationary Trains...... 13 1.9.2 Moving Trains ...... 13 1.10 Ports (Shipping) ...... 13 1.11 Industrial Sources ...... 13 1.11.1 Industrial Installations ...... 13 1.11.2 Major Fuel (Petrol Storage Depots) ...... 14 1.11.3 Petrol Stations ...... 14 1.11.4 Poultry Farms ...... 14 1.11.5 Biomass Combustion – Individual Installations ...... 14 2 Actions to Improve Air Quality ...... 15 2.1 Air Quality Management Areas ...... 15 2.2 Progress and Impact of Measures to address Air Quality in Sedgemoor ...... 15
2.3 PM2.5 – Local Authority Approach to Reducing Emissions and/or Concentrations ...... 18
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3 Air Quality Monitoring Data and Comparison with Air Quality Objectives and National Compliance ...... 19 3.1 Summary of Monitoring Undertaken ...... 19 3.1.1 Automatic Monitoring Sites ...... 19 3.1.2 Non-Automatic Monitoring Sites ...... 19 3.2 Individual Pollutants ...... 20
3.2.1 Nitrogen Dioxide (NO2) ...... 20 Appendix A: Monitoring Results ...... 21 Table A.1 Details of Non-Automatic Monitoring Sites ...... 21
Table A.2 – Annual Mean NO2 Monitoring Results ...... 25 Appendix B: Full Monthly Diffusion Tube Results for 2016 ...... 27
Table B.1 – NO2 Monthly Diffusion Tube Results - 2016...... 27 Appendix C: Supporting Technical Information / Air Quality Monitoring Data QA/QC ...... 29 C.1 – Diffusion Tube Bias Adjustment Factors ...... 29 C.2 – QA/QC of diffusion tube monitoring for 2016 ...... 29 C.3 – Annual throughput – Port of Bridgwater ...... 30 C.4 – Sedgemoor Traffic Count Data - AADTTable showing last 5 years: ...... 31 C.5 – Sedgemoor Traffic Count Data – Graphs: ...... 32 C.6 – Sedgemoor Traffic Count Data - List of all Sedgemoor sites: ...... 33 C.7 – Review of Sedgemoor traffic count data against table 7.1 of Technical Guidance (TG16) ...... 34 Appendix D: Map(s) of Monitoring Locations ...... 35 Appendix E: Summary of Air Quality Objectives in England ...... 50 Glossary of Terms ...... 51 References ...... 52
List of Tables Table 2.1 – Progress on Measures to Improve Air Quality ...... 177
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1 Local Air Quality Management 1.1 Background
This report provides an overview of air quality in Sedgemoor during 2016. It fulfils the requirements of Local Air Quality Management (LAQM) as set out in Part IV of the Environment Act (1995) and the relevant Policy and Technical Guidance documents.
The LAQM process places an obligation on all local authorities to regularly review and assess air quality in their areas, and to determine whether or not the air quality objectives are likely to be achieved. Where an exceedance is considered likely the local authority must declare an Air Quality Management Area (AQMA) and prepare an Air Quality Action Plan (AQAP) setting out the measures it intends to put in place in pursuit of the objectives. This Annual Status Report (ASR) is an annual requirement showing the strategies employed by Sedgemoor District Council to improve air quality and any progress that has been made.
The statutory air quality objectives applicable to LAQM in England can be found in Appendix E. A summary of potential sources of air pollutants is described below.
1.2 Narrow Congested Streets with Residential Properties Close to the Kerb
This issue has been assessed in previous rounds of review and assessment and has been re-assessed in this ASR. Sedgemoor District Council confirms that there are 2 newly identified congested streets with a flow above 5,000 vehicles per day and residential properties close to the kerb, which require additional assessment. The two roads; A372 Westonzoyland Road and St Johns Street require NO2 monitoring to be carried out.
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1.3 Busy Streets Where People May Spend 1-hour or More Close to Traffic
This issue has been assessed in previous rounds of review and assessment and has been re-assessed in this ASR. Sedgemoor District Council confirms that there are no new/newly identified busy streets where people may spend 1 hour or more close to traffic.
1.4 Roads with a High Flow of HDVs
This issue has been assessed in previous rounds of review and assessment and has been re-assessed in this ASR. Sedgemoor District Council confirms that there are no new/newly identified roads with high flows of HDVs.
1.5 Junctions
This issue has been assessed in previous rounds of review and assessment and has been re-assessed in this ASR. Sedgemoor District Council confirms that there are no new/newly identified junctions which meet the criteria of table 7.1 in the Local Air Quality Management Technical Guidance (TG16).
1.6 New Roads Constructed or Proposed Since the Last Round of Review and Assessment
This issue has been assessed in previous rounds of review and assessment and has been re-assessed in this ASR. Sedgemoor District Council confirms there are no new or proposed roads wince the last round of review and assessment which meet the criteria of table 7.1 in the Local Air Quality Management Technical Guidance (TG16).
1.7 Roads with Significantly Changed Traffic Flows
Due to the proposal to construct two new nuclear reactors for electricity generation at Hinkley Point which is located in the area of West Somerset District Council (a
LAQM Annual Status Report 2017 11 Sedgemoor District Council neighbouring local authority) there is an expectation for an increase in traffic flows. However, this is mainly expected to be HGVS as employees should use a new park and ride service provided by EDF.
Whilst the reactors will not be in our district some of the main access roads to the site including the Cannington Bypass do run through our district, potentially increasing traffic flows on these access roads.
As part of the environmental assessment and planning process, Sedgemoor District Council requested that air quality assessments were undertaken to assess impacts from this development. In the EDF Energy Masterplan for the Cannington Bypass on page 1, paragraph 1.1.3 the plan states that “assessments suggest that […] no air quality standards would be breached.”
Sedgemoor District Council’s increased number of diffusion tube monitoring points is to also cover such routes which may be affected by increased traffic flows caused by the EDF works and is currently collecting data that can be used to assess whether nitrogen dioxide levels are increasing as a result of the EDF works. Sedgemoor District Council confirms there is potential for certain roads to incur increased traffic flows due to proposed works by EDF Energy. This however, is being monitored via the use of nitrogen dioxide diffusion tubes.
Sedgemoor District Council confirms there are no roads with significantly changed traffic flows which meet the criteria of table 7.1 in the Local Air Quality Management Technical Guidance (TG16).
1.8 Airports
Sedgemoor District Council confirms that there are no airports within the Local Authority area.
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1.9 Railways (Diesel and Steam Trains)
1.9.1 Stationary Trains
This issue has been assessed in a previous round of review and assessment and having assessed this issue there are no known locations where diesel trains are stationary for periods of 15 minutes or more with relevant exposure within 15 meters. Trains stopping at Bridgwater Train Station are only stationary for 1 to 2 minutes.
1.9.2 Moving Trains
Having reviewed the 2009 Guidance on Assessing Emissions from Railway Locomotives (see appendix F) Sedgemoor District Council is not identified as an authority with a background annual mean nitrogen dioxide concentration above 25 g/m3 and is therefore not identified as an authority that needs to assess this issue further. Sedgemoor District Council confirms that there are no locations with a large number of movements of diesel locomotives, and potential long-term relevant exposure within 30m.
1.10 Ports (Shipping)
Whilst Sedgemoor District Council is a port of authority the port of Bridgwater only has limited ship movements. In 2016 there were a total of 60 ship visits. A visit is the round trip from Sea to the berth and back out to Sea. See Appendix D: Annual throughput - Port of Bridgwater.
1.11 Industrial Sources
1.11.1 Industrial Installations - New or Proposed Installations for which an Air Quality Assessment has been Carried Out
From reviewing planning application data there are no known new industrial processes operating in Sedgemoor District Council area since the last round of review and assessment that would impact on local air quality.
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Industrial Installations - Existing Installations where Emissions have Increased Substantially or New Relevant Exposure has been introduced
Sedgemoor District Council confirms that there are no industrial installations with substantially increased emissions or new relevant exposure in their vicinity within its area or nearby in a neighbouring authority.
Industrial Installations - New or Significantly Changed Installations with No Previous Air Quality Assessments
Sedgemoor District Council confirms that there are no new or proposed industrial installations for which planning approval has been granted within its area or nearby in a neighbouring authority.
1.11.2 Major Fuel (Petrol Storage Depots)
There are no major fuel (petrol) storage deposits within the Local Authority area.
1.11.3 Petrol Stations Since the last ASR was submitted, there has been one new petrol station installed which has been issued with an environmental permit.
1.11.4 Poultry Farms
From reviewing the IPPC Public Register there are no known poultry units operating within the Sedgemoor area that are above the thresholds detailed in the DEFRA technical guidance LAQM. TG(16).
1.11.5 Biomass Combustion – Individual Installations
There are no new biomass boilers since the last ASR was submitted.
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2 Actions to Improve Air Quality 2.1 Air Quality Management Areas
Air Quality Management Areas (AQMAs) are declared when there is an exceedance or likely exceedance of an air quality objective. After declaration, the authority must prepare an Air Quality Action Plan (AQAP) within 12-18 months setting out measures it intends to put in place in pursuit of compliance with the objectives. Sedgemoor District Council does not have any AQMAs.
2.2 Progress and Impact of Measures to address Air Quality in Sedgemoor
The ASR for 2016, submitted in June 2016, confirmed that there had been no exceedances of the annual mean objective for Nitrogen Dioxide. Sedgemoor District Council has not declared any Air Quality Management Areas and measured concentrations over the last five years have not exceeded the annual mean objective. Defra approved the 2016 ASR and accepted the conclusions that emissions from all sources were at an acceptable level.
Defra advised “The report was well structured, very detailed and comprehensive, and provided the information specified in the Guidance. It also included additional information to assess recent new sources”. Defra concluded that Sedgemoor District Council could provide further details to show evidence of the progress they are making to improve air quality within the district.
Sedgemoor District Council is committed to working to improve air quality particularly with respect to any potential impacts of the Hinkley Point C development and monitoring continues. In addition EDF are required to meet planning restrictions on issues such as vehicle movements.
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Sedgemoor District Council has taken forward a number of direct measures during the reporting year of 2016 in pursuit of improving local air quality. Details of all measures completed, in progress or planned are set out in Table 2.1.
Sedgemoor District Council expects the following measures to be completed over the course of the next reporting year:
A review of the Environmental Protection Teams response to planning application consultations with regard to air quality for large scale developments. The likely requirement for assessment of air quality impacts including baseline data, during construction and operational phases, and any mitigation measures.
Particulate monitor(s) – researching into their feasibility and potential use for
the analysis of particulate matter such as PM2.5 and PM10 on certain roads throughout Bridgwater in reaction to the increase in traffic caused by the
construction of Hinkley Point C.
Monitor the results of the two new NO2 diffusion tube locations. One on Westonzoyland Road (DT3) and one on St John Street (DT35), both in Bridgwater.
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Table 2.1 – Progress on Measures to Improve Air Quality
Organisations Reduction in Estimated / EU Key Measure involved and Planning Implementation Pollutant / Actual Comments / Barriers Measure EU Category Classificati Performance Progress to Date No. Funding Phase Phase Emission Completion to implementation on Indicator Source from Measure Date To meet Must comply LAPPC compliance Environmental Sedgemoor with All RA’s done and 1 permit Other N/A Implemented with Achieved for 2017 Completed permits District Council environmental inspections inspections environmental permit permit New air NO2 40µg/m3 40µg/m3 quality Sedgemoor Drafted for 2 N/A N/A Drafted August 2017 annual mean annual mean August 2017 N/A planning District Council approval objective objective condition
NO diffusion 40µg/m3 Roadworks and traffic 2 Traffic Sedgemoor Monitoring in 3 tube Other N/A Implemented As table E.1 annual mean Ongoing yearly jams may contribute to management District Council progress monitoring objective a rise in NO2 for 2017
2 new NO2 diffusion NO2 40µg/m3 40µg/m3 1st full year of results Traffic Sedgemoor Monitoring in 4 tube Other N/A Implemented annual mean annual mean Ongoing yearly will be available end management District Council progress monitoring objective objective Dec 2018 locations Procurement Council Promoting low -prioritising Electric pool car to be Sedgemoor mileage 5 electric pool emission uptake of Achieved Implemented N/A Achieved Completed used instead of District Council targets car scheme transport low emission personal car vehicles
Promoting low Sedgemoor Monitor Equipment suitability 6 PM N/A ongoing As table E.2 N/A ongoing End 2017 2.5 emission District Council research and costs
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2.3 PM2.5 – Local Authority Approach to Reducing Emissions and/or Concentrations
As detailed in Policy Guidance LAQM.PG16 (Chapter 7), local authorities are expected to work towards reducing emissions and/or concentrations of PM2.5 (particulate matter with an aerodynamic diameter of 2.5µm or less). There is clear evidence that PM2.5 has a significant impact on human health, including premature mortality, allergic reactions, and cardiovascular diseases.
To address PM2.5, Sedgemoor District Council is researching the feasibility of installing monitors to analyse particulate matter such as PM2.5 and PM10 at locations within Sedgemoor.
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3 Air Quality Monitoring Data and Comparison with Air Quality Objectives and National Compliance 3.1 Summary of Monitoring Undertaken
3.1.1 Automatic Monitoring Sites
This section sets out what monitoring has taken place and how it compares with objectives.
Sedgemoor District Council does not have any automatic (continuous) monitoring sites. NB. Local authorities do not have to report annually on the following pollutants: 1,3 butadiene, benzene, carbon monoxide and lead, unless local circumstances indicate there is a problem.
3.1.2 Non-Automatic Monitoring Sites
Sedgemoor District Council undertook non-automatic (passive) monitoring of NO2 at 29 sites during 2016. Table A.1 Details of Non-Automatic Monitoring Sites in Appendix A shows the details of the sites.
A review of Table 7.1 – Screening assessment of Road Traffic Sources, from the Local Air Quality Management Technical Guidance (TG16), April 2016 has identified the need for two new NO2 monitoring locations (DT34 and (DT35). These two new sites will monitor NO2 from July 2017.
Maps showing the location of the monitoring sites are provided in Appendix D. Further details on Quality Assurance/Quality Control (QA/QC) for the diffusion tubes, including bias adjustments and any other adjustments applied (e.g. “annualisation” and/or distance correction), are included in Appendix C.
LAQM Annual Status Report 2017 19 Sedgemoor District Council 3.2 Individual Pollutants
The air quality monitoring results presented in this section are, where relevant, adjusted for bias, “annualisation” and distance correction. Further details on adjustments are provided in Appendix C.
3.2.1 Nitrogen Dioxide (NO2)
Table A.2 – Annual Mean NO2 Monitoring Results in Appendix A compares the ratified and adjusted monitored NO2 annual mean concentrations for the past 5 years with the air quality objective of 40µg/m3. For diffusion tubes, the full 2016 dataset of monthly mean values is provided in Appendix B.
Within the district there are no monitoring locations were the NO2 annual mean concentration has exceeded 40µg/m3.
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Appendix A: Monitoring Results
Table A.1 Details of Non-Automatic Monitoring Sites
Tube Distance to Distance to X OS Y OS In collocated Site Pollutants Relevant kerb of Height Site Name Site Type Grid Grid AQMA with a ID Monitored Exposure nearest (m) Ref Ref ? Continuous (m) (1) road (m) (2) Analyser? Residential DT1 Carlton Drive 329611 138122 NO2 No 6 1.7 No 2 street
Residential DT2 Camden Road 329472 137301 NO2 No 2.5 1.5 No 2 street
DT3 West Street Main road 329471 136928 NO2 No 19 0.60 No 2
St Saviours Residential DT6 330061 136858 NO2 No 5 1.7 No 2 Avenue street
Salmon DT7 Side street 330171 136912 NO2 No 38 1 No 2 Parade
Monmouth DT8 Main road 330388 137263 NO2 No 0 2.30 No 2 Street
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Tube Distance to Distance to X OS Y OS In collocated Site Pollutants Relevant kerb of Height Site Name Site Type Grid Grid AQMA with a ID Monitored Exposure nearest (m) Ref Ref ? Continuous (m) (1) road (m) (2) Analyser? Monmouth Main road DT9 330456 137391 NO2 No 12 1.2 No 2 Street roundabout
Residential DT11 Clover Way 332173 147968 NO2 No 20 1.7 No 2 street
DT12 Church Street High St 331972 147301 NO2 No 0 1.57 No 2
Rooksbridge DT13 Lane 336300 153380 NO2 No 103 10 No 2 M5 bridge
Rooksbridge DT14 Lane 336378 153293 NO2 No 44 2 No 2 road
DT15 Mendip road Lane 336112 152946 NO2 No 20 1 No 2
Cheddar DT16 High St 346632 153911 NO2 No 11 5.6 No 2 National Trust
Residential DT17 Mason’s Way 346306 153243 NO2 No 6.5 1.54 No 2 street
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Tube Distance to Distance to X OS Y OS In collocated Site Pollutants Relevant kerb of Height Site Name Site Type Grid Grid AQMA with a ID Monitored Exposure nearest (m) Ref Ref ? Continuous (m) (1) road (m) (2) Analyser?
DT18 Huntworth M5 J24 330584 134059 NO2 No 186 5 No 2
DT20 East Quay Main road 330157 137965 NO2 No 228 2.3 No 2
Main road DT21 NDR 328409 137081 NO2 No 27 0.53 No 2 roundabout
DT22 Taunton road Main road 330331 135726 NO2 No 4 1.65 No 2
DT23 Parkway Main road 331328 138101 NO2 No 11 2.2 No 2
DT24 Bath road Main road 330942 137801 NO2 No 1 4.5 No 2
Bristol road, DT25 Main road 330631 138146 NO2 No 15 2.8 No 2 North
Wembdon DT26 Main road 329076 136899 NO2 No 8.5 1 No 2 road
DT27 Quantock road Main road 328650 136967 NO2 No 15 1 No 2
DT28 Quantock road Main road 328247 137062 NO2 No 12 1 No 2
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Tube Distance to Distance to X OS Y OS In collocated Site Pollutants Relevant kerb of Height Site Name Site Type Grid Grid AQMA with a ID Monitored Exposure nearest (m) Ref Ref ? Continuous (m) (1) road (m) (2) Analyser? Cannington DT29 High St 325523 139600 NO2 No 7 1 No 2 East
Cannington DT30 High St 325331 139509 NO2 No 24 1 No 2 West
DT31 Taunton road Main road 330072 136452 NO2 No 4 1 No 2
Bristol road, DT32 Main road 330562 137821 NO2 No 12 1 No 2 south
Bristol road, DT33 Main road 331130 140751 NO2 No 19 1 No 2 Dunball
Top of DT34 Sedgemoor Main road 331149 136653 NO2 No 19 1 No 2 NEW Road
DT35 St John Street Main road 330429 137054 NO2 No 1 3 No 2 NEW
LAQM Annual Status Report 2017 24 Sedgemoor District Council
Table A.2 – Annual Mean NO2 Monitoring Results
Valid Data 3 (3) Valid Data NO2 Annual Mean Concentration (µg/m ) Capture for Site ID Site Type Monitoring Type Capture 2016 Monitoring (%) (2) 2012 2013 2014 2015 2016 Period (%) (1) DT1 Residential Diffusion Tube N/A 100 13.65 15.44 13.27 12.90 13.60 DT2 Residential Diffusion Tube N/A 100 16.01 16.47 14.94 13.15 14.07 DT3 Main Rd Diffusion Tube N/A 100 27.67 31.25 30.98 27.99 28.48 DT6 Residential Diffusion Tube N/A 100 20.57 22.18 22.29 20.99 20.10 DT7 Side street Diffusion Tube N/A 100 25.42 26.89 25.55 24.00 23.76 DT8 Main Rd Diffusion Tube N/A 92 26.00 31.35 32.19 28.76 27.87 DT9 Main Rd Diffusion Tube N/A 100 35.05 39.70 39.46 36.51 34.42 DT11 Main Rd Diffusion Tube N/A 100 14.34 15.52 15.96 14.11 14.01 DT12 High St Diffusion Tube N/A 100 24.19 26.54 26.33 26.93 26.23 DT13 Lane Diffusion Tube N/A 100 25.27 28.63 26.58 25.26 24.56 DT14 Lane Diffusion Tube N/A 92 20.39 19.74 18.13 17.90 20.97 DT15 Lane Diffusion Tube N/A 92 14.77 18.61 17.84 18.07 17.08 DT16 High St Diffusion Tube N/A 100 8.05 10.62 9.93 9.57 9.46 DT17 Residential Diffusion Tube N/A 100 9.07 11.76 9.95 9.41 9.45 DT18 M5 J24 Diffusion Tube N/A 100 28.80 28.46 29.02 29.50 27.52 DT20 Main Rd Diffusion Tube N/A 100 24.72 28.42 24.43 23.95 23.68 DT21 Main Rd Diffusion Tube N/A 92 24.28 22.21 24.88 23.68 25.26 DT22 Main Rd Diffusion Tube N/A 100 20.06 26.65 26.38 22.10 23.52 DT23 Main Rd Diffusion Tube N/A 100 21.52 25.33 22.28 21.23 21.00 DT24 Main Rd Diffusion Tube N/A 92 25.18 24.59 26.05 24.45 22.98 DT25 Main Rd Diffusion Tube N/A 92 28.08 31.13 29.75 29.21 27.26 DT26 Main Rd Diffusion Tube N/A 100 - - 26.99 24.80 25.82 DT27 Main Rd Diffusion Tube N/A 92 - - 24.02 21.46 23.10 DT28 Main Rd Diffusion Tube N/A 100 - - 38.45 33.65 31.99 DT29 High St Diffusion Tube N/A 92 - - 16.40 15.84 13.69 DT30 High St Diffusion Tube N/A 100 - - 11.21 11.52 9.89 DT31 Main Rd Diffusion Tube N/A 100 - - 38.12 29.81 29.92 DT32 Main Rd Diffusion Tube N/A 92 - - 34.77 34.02 31.87 DT33 Main Rd Diffusion Tube N/A 100 - - 35.31 34.63 33.63
LAQM Annual Status Report 2017 25 Sedgemoor District Council
Valid Data 3 (3) Valid Data NO2 Annual Mean Concentration (µg/m ) Capture for Site ID Site Type Monitoring Type Capture 2016 Monitoring (%) (2) 2012 2013 2014 2015 2016 Period (%) (1) DT34 Main Rd Diffusion Tube (NEW FOR 2017) (NEW FOR 2017) - - - - - DT35 Main Rd Diffusion Tube (NEW FOR 2017) (NEW FOR 2017) - - - - - ☒ Diffusion tube data has been bias corrected ☐ Annualisation has been conducted where data capture is <75% ☐ If applicable, all data has been distance corrected for relevant exposure
Notes: 3 Exceedances of the NO2 annual mean objective of 40µg/m are shown in bold. 3 NO2 annual means exceeding 60µg/m , indicating a potential exceedance of the NO2 1-hour mean objective are shown in bold and underlined. (1) Data capture for the monitoring period, in cases where monitoring was only carried out for part of the year. (2) Data capture for the full calendar year (e.g. if monitoring was carried out for 6 months, the maximum data capture for the full calendar year is 50%). (3) Means for diffusion tubes have been corrected for bias. All means have been “annualised” as per Boxes 7.9 and 7.10 in LAQM.TG16 if valid data capture for the full calendar year is less than 75%. See Appendix C for details. (4) New diffusion tubes DT34 and DT35 will be monitored from July 2017 onwards.
Data capture at all monitoring locations was higher than 90% and is therefore is considered to be reliable.
Sedgemoor District Council does not have any automatic (continuous) monitoring sites to monitor the NO2 1-hour mean objective. However, Para 7.91 of LAQM TG.16 states: Previous research carried out on behalf of Defra and the Devolved Administrations (Laxen D and Marner B (2003). Analysis of the relationship between 1-hour and annual mean nitrogen dioxide at UK roadside and kerbside monitoring sites - http://uk- air.defra.gov.uk/assets/documents/reports/cat06/1hr_NO2_rpt_Final_b.pdf) identified that exceedances of the NO2 1-hour mean are unlikely to occur where the annual mean is below 60μg/m3 and this assumption is still considered valid. Sedgemoor District 3 Council has no NO2 annual means exceeding 60µg/m , indicating a potential exceedance of the NO2 1-hour mean objective and therefore does not continuously monitor NO2 1-hour mean.
LAQM Annual Status Report 2017 26 Sedgemoor District Council
Appendix B: Full Monthly Diffusion Tube Results for 2016
Table B.1 – NO2 Monthly Diffusion Tube Results - 2016
3 NO2 Mean Concentrations (µg/m ) Annual Mean Distance Bias Corrected Site ID Adjusted Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Raw to (0.94) and Data Nearest Annualised Exposure (1) (2) DT1 10.16 13.38 15.35 12.48 12.81 10.39 7.02 7.55 13.40 21.00 21.65 28.47 14.47 13.60 12.1 DT2 12.43 15.89 14.86 12.07 10.96 9.46 6.94 8.53 13.27 21.47 22.62 31.09 14.97 14.07 13.3 DT3 13.61 34.12 36.31 30.73 28.34 27.00 24.15 24.49 27.48 44.14 36.27 36.90 30.30 28.48 16.6 DT6 11.64 26.69 24.53 19.48 18.02 16.39 13.40 15.06 23.53 27.52 25.47 34.82 21.38 20.10 18.6 DT7 18.71 26.84 29.28 20.60 24.16 22.30 17.07 18.86 24.30 33.40 31.24 36.53 25.27 23.76 17.4 DT8 13.37 missing 35.42 24.02 27.29 29.16 21.17 22.37 33.46 39.00 40.76 40.17 29.65 27.87 27.9 DT9 26.44 41.07 47.27 36.13 35.87 37.09 32.72 28.96 39.70 43.17 46.72 24.22 36.61 34.42 23.9 DT11 10.21 18.11 17.15 10.73 12.07 10.70 8.15 8.23 14.26 20.13 19.83 29.31 14.91 14.01 14.3 DT12 10.23 32.82 35.09 24.39 28.78 25.18 18.27 19.21 26.88 36.84 38.52 38.64 27.90 26.23 26.2 DT13 17.74 33.77 33.42 24.89 18.36 31.76 27.49 15.71 27.17 29.05 26.25 27.88 26.12 24.56 17.4 DT14 15.34 27.13 20.27 18.57 29.60 17.19 missing 26.65 16.28 21.45 32.70 20.16 22.30 20.97 14.9 DT15 10.84 24.69 23.63 missing 15.68 17.08 15.66 15.35 16.73 23.02 15.89 21.30 18.17 17.08 12.6 DT16 6.80 12.37 12.02 9.74 8.68 8.59 7.07 7.07 8.14 13.25 12.21 14.81 10.06 9.46 9.1 DT17 8.27 12.35 10.75 10.69 7.05 8.05 5.74 5.14 7.71 14.22 14.39 16.33 10.06 9.45 8.8 DT18 13.53 33.09 33.30 24.99 26.48 27.58 30.07 28.13 29.21 35.10 38.94 30.92 29.28 27.52 18.1
LAQM Annual Status Report 2017 27 Sedgemoor District Council
DT20 18.01 27.52 29.81 21.60 23.83 23.15 16.76 16.62 20.53 37.69 34.96 31.85 25.19 23.68 16.0 DT21 11.95 28.61 missing 25.17 25.83 27.62 18.37 22.71 26.45 36.19 38.25 34.39 26.87 25.26 13.8 DT22 0.06 24.52 27.35 27.13 23.93 26.16 17.62 18.86 30.09 34.15 34.44 35.94 25.02 23.52 20.3 DT23 16.26 25.60 24.15 16.22 20.79 19.61 17.11 17.99 23.20 27.93 28.08 31.18 22.34 21.00 17.5 DT24 12.67 29.26 missing 20.24 22.24 21.91 16.82 17.77 23.38 33.90 32.16 38.59 24.45 22.98 22.4 DT25 17.43 33.76 missing 0.19 47.63 29.33 24.39 23.43 30.58 34.21 39.78 38.27 29.00 27.26 19.9 DT26 13.92 36.55 34.44 19.34 25.14 22.81 17.85 19.01 25.15 37.22 36.66 41.52 27.47 25.82 18.6 DT27 14.43 missing 26.32 22.24 26.88 21.38 16.39 18.55 24.17 35.34 31.96 32.71 24.58 23.10 15.0 DT28 18.93 30.34 38.02 32.85 35.01 22.12 28.26 24.24 35.53 45.57 43.59 53.94 34.03 31.99 20.1 DT29 12.02 15.15 15.60 13.00 11.24 10.74 missing 10.48 13.24 20.37 14.63 23.76 14.57 13.69 10.9 DT30 8.93 11.94 12.67 8.32 8.92 7.56 6.11 6.65 9.48 16.88 20.60 8.17 10.52 9.89 8.0 DT31 14.33 32.37 32.39 31.89 28.28 34.40 25.96 25.21 36.41 40.06 38.71 41.94 31.83 29.92 25.1 DT32 28.45 35.77 missing 27.36 31.70 33.11 31.41 27.92 29.31 44.30 42.51 41.12 33.91 31.87 22.3 DT33 15.79 39.69 37.06 30.71 34.91 34.32 33.54 31.25 39.74 42.84 41.58 47.91 35.78 33.63 22.5 DT34 ------DT35 ------
☒ Local bias adjustment factor used ☐ National bias adjustment factor used ☐ Annualisation has been conducted where data capture is <75%
Notes: 3 Exceedances of the NO2 annual mean objective of 40µg/m are shown in bold. 3 NO2 annual means exceeding 60µg/m , indicating a potential exceedance of the NO2 1-hour mean objective are shown in bold and underlined. (1) See Appendix C for details on bias adjustment and annualisation. (2) Distance corrected to nearest relevant public exposure. (3) New diffusion tubes DT34 and DT35 will be monitored from July 2017 onwards.
LAQM Annual Status Report 2017 28 Sedgemoor District Council
Appendix C: Supporting Technical Information / Air Quality Monitoring Data QA/QC
C.1 – Diffusion Tube Bias Adjustment Factors
In 2016 Sedgemoor District Council’s diffusion tubes were supplied and analysed by Gradko Ltd. The Gradko tube preparation method was: 20% TEA / Water.
Sedgemoor District Council does not undertake local co-location Studies and has therefore used a bias adjustment factor taken from the Diffusion Tube Bias Adjustment Factors Spreadsheet latest version of the spreadsheet (version 03/17 V2). The factor used was 0.94 and was based on 21 co-location studies.
C.2 – QA/QC of diffusion tube monitoring for 2016:
LAQM Annual Status Report 2017 29 Sedgemoor District Council
C.3 – Annual throughput – Port of Bridgwater:
LAQM Annual Status Report 2017 30 Sedgemoor District Council
C.4 – Sedgemoor Traffic Count Data - AADTTable showing last 5 years:
Site Name 2012 2013 2014 2015 2016 All Vehs HGVs All Vehs HGVs All Vehs HGVs All Vehs HGVs All Vehs HGVs Cl 3 Skimmerton Lane 160 150 230 No Data 160 No Data 140 No Data
B3339 Wembdon Rise 4050 4110 4210 50 4330 50 4260 50
A39 Quantock Road (E of NDR Roundabout) 13700 13500 470 13800 470 13860 590 14240 600
Cl3 Victoria Road (Canal Bridge) 3530 3570 3730 70 3490 60 3580 60
A38 Taunton Road (Canal Bridge) 27400 880 27080 1000 28250 1160 26250 970 28380 1000
A39 Broadway (West of Salmon Parade) 26600 26610 27760 1300 26060 1260 26373 1290
Cl3 High Street (Town Hall) 3390 3240 3120 60 3140 60 3300 60
Cls Bascule Bridge 3660 3650 3890 No Data 3930 No Data 3950 No Data
Cl3 The Clink East of Northgate) 12970 12650 12530 250 12700 240 11460 250
Cl3 Town Bridge 6330 4450 No Data 4130 No Data 4530 No Data
Cl3 The Drove 6780 7130 7620 150 8270 150 8100 150
Cl3 Chilton Street (S of Western Way 3090 3060 3190 70 3290 70 3300 70
Cl3 East Quay 9850 10150 10010 200 9450 200 9340 200
Cl3 Wylds Road (North of NDR) 11450 430 11180 390 9630 400 10900 370 10240 310
Northern Distributor Road (Bridge) 15980 310 15930 310 15470 350 17030 420 17090 370
A38 Horsey Level (North of Wylds Road) 21750 1270 22460 1150 23220 1160 24090 1130 24080 1230
A39 South of Horsey Level (East of Bower Lane) 12280 860 13100 950 12520 620 13010 630 13420 630
Salmon Parade 4280 400 4510 410 4580 430 4260 400 4470 420
All Saints Terrace 1510 1640 2100 No Data 2310 No Data 2240 No Data
A372 Westonzoyland Rd 13970 210 13920 200 13860 220 13950 180 14440 230
A38 Taunton Rd South 23100 720 23750 700 23860 780 22960 780 23270 790
Monmouth Street (West of A372) 16600 740 16830 740 17560 740 17190 720 17400 734
Monmouth Street (East of A372) 22620 850 22970 910 21560 900 21820 920
St Johns Street 10735 240 10750 240 11100 240 11350 240 11490 250
A38 Bristol Road ( South or Wylds Road) 15900 800 15930 790 16391 770 16720 750 16920 770 A39 Bath Road (West of Park Way) 15220 220 17760 360 18300 360 18700 350 18920 360
LAQM Annual Status Report 2017 31 Sedgemoor District Council
C.5 – Sedgemoor Traffic Count Data – Graphs:
LAQM Annual Status Report 2017 32 Sedgemoor District Council
C.6 – Sedgemoor Traffic Count Data - List of all Sedgemoor sites:
AADT Summary Report ATC's 2016 AADT Summary Report ATC's 2016 in Sedgemoor - this data has not been fully validated
Site ID Site Name AADT 2016 000000005037 000000005037 - Shapwick, A39 Bath Road 12487 000000005040 00000005040 - A39 Swang Fm, Cannington (M 8497 000000005045 000000005045 - Axbridge A371 12703 000000005064 000000005064 - A39 Puriton Hill 16854 000000005177 000000005177 - A38 Lower Weare XX U/G CABINET XX 12685 000000005201 000000005201 - A38 North of North Petherton 13706 000000005335 000000005335 - A372 Double Bridge, Westonzoyland 6951 000000005369 000000005369 - B3139 Theale 1931 000000005414 000000005414 - B3139 East Huntspill 2304 000000005419 000000005419 - B3140 Edithmead, E of Burnham 14565 000000005445 000000005445 - A38 North of Highbridge 12764 000000005457 000000005457 - B3139 Mark Causeway 901 000000005540 000000005540 - Oxmoor B3151, S of Cheddar 3730 000000000709 000000000709 - B3140 Berrow Coast Road 9202 000000000711 000000000711 - High Street, Bridgwater 3300 000090000062 000090000062 - Dunball A39 M5 Link 20441 000090000065 000090000065 - Lympsham A370 14300 000090000390 000090000390 - A38 Dawes Cottages, Bridgwater 000090000392 000090000392 - Showground Rd, Bridgwater 2092 000090000414 000090000414 - Withycombe Hill, Combwich 4007 000090033439 000090033439 - A38 Edithmead 29771 000090056355 000090056355 - A38 Pawlett Road 10789
Cycle Counter Sites 000020000002 00020000002 - The Clink, Bridgwater (Cycle 153 000020000003 00020000003 - Bridgwater College (Cycle 144 000020000008 00020000008 - Wembdon Link, Bridgwater (Cycle 93 000020000014 00020000014 - Cranleigh Gdns, Bridgwater (Cycle 68 000020000018 00020000018 - Salmon Parade, Bridgwater (Cycle 40 000020000019 00020000019 -The Frank Foley Pkway, B-o-S (Cycle 33 000020000020 00020000020 - Western Way, Bridgwater (Cycle 158 000020000021 00020000021 - Stockmoor, Bridgwater (Cycle 73 000020000030 00020000030 - A38 Taunton Rd, Bridgwater (Cycle 157
LAQM Annual Status Report 2017 33 Sedgemoor District Council
C.7 – Review of Sedgemoor traffic count data against table 7.1 of Technical Guidance (TG16)
Road Road source Action required Outcome category C13 Skimmerton Lane N/A – criteria not met N/A N/A B3339 Wembdon Rise N/A – criteria not met N/A N/A A39 Quantock Road Table 7.1 cat 1 NO2 monitoring No annual (East of NDR exceedances 2016 roundabout) C13 Victoria Road N/A – criteria not met N/A N/A (Canal Bridge) A38 Taunton Road Table 7.1 cat 1 NO2 monitoring No annual (Canal Bridge) exceedances 2016 A39 Broadway Table 7.1 cat 1 NO2 monitoring No annual (West of Salmon exceedances 2016 Parade) C13 High Street N/A – criteria not met N/A N/A (Town Hall) Cls Bascule Bridge N/A – criteria not met N/A N/A C13 The Clink East of N/A – criteria not met N/A N/A Northgate C13 Town Bridge N/A – criteria not met N/A N/A C13 The Drove N/A – criteria not met N/A N/A C13 Chilton Street N/A – criteria not met N/A N/A (S of Western Way) C13 East Quay N/A – criteria not met N/A N/A C13 Wylds Road N/A – criteria not met N/A N/A (North of NDR) Northern Distributor N/A – criteria not met N/A N/A Road (NDR Bridge) A38 Horsey Level Table 7.1 cat 1 NO2 monitoring No annual (North of Wylds Road exceedances 2016 Bristol Road) A39 South of Horsey Table 7.1 cat 1 NO2 monitoring No annual Level (East of Bower exceedances 2016 Lane – Bath Road) Salmon Parade N/A – criteria not met N/A N/A All Saints Terrace N/A – criteria not met N/A N/A A372 Westonzoyland Table 7.1 cat 1 NO2 monitoring Carry out NO2 Road monitoring A38 Taunton Road Table 7.1 cat 1 NO2 monitoring No annual (South) exceedances 2016 Monmouth Street (West N/A – criteria not met N/A N/A of A372) Monmouth Street Table 7.1 cat 1 NO2 monitoring No annual (East of A372) exceedances 2016 St John Street Table 7.1 cat 1 NO2 monitoring Carry out NO2 monitoring A38 Bristol Road Table 7.1 cat 1 NO2 monitoring No annual (South of Wylds Road) exceedances 2016 A39 Bath Road Table 7.1 cat 1 NO2 monitoring No annual (West of Park Way) exceedances 2016
Note: Diffusion tubes on Westonzoyland Road (DT34) and St John Street (DT35) will be installed at the end of June 2017 for analysis from July 2017 onwards.
LAQM Annual Status Report 2017 34 Sedgemoor District Council
Appendix D: Map(s) of Monitoring Locations
SITE 1
SITE 2
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SITE 3
SITE 6
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SITE 7
SITE 8
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SITE 9
SITE 11
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SITE 12
SITE 13
SITE 14
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SITE 15
SITE 16
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SITE 17
SITE 18
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SITE 20
SITE 21
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SITE 22
SITE 23
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SITE 24
SITE 25
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SITE 26
SITE 27
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SITE 28
SITE 29
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SITE 30
SITE 31
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SITE 32
SITE 33
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SITE 34
New site from July 2017
SITE 35
New site from July 2017
LAQM Annual Status Report 2017 49 Sedgemoor District Council
Appendix E: Summary of Air Quality Objectives in England
Air Quality Objective4 Pollutant Concentration Measured as 200 µg/m3 not to be exceeded more Nitrogen Dioxide 1-hour mean than 18 times a year (NO2) 40 µg/m3 Annual mean 50 µg/m3, not to be exceeded more Particulate Matter 24-hour mean than 35 times a year (PM10) 40 µg/m3 Annual mean 350 µg/m3, not to be exceeded more 1-hour mean than 24 times a year Sulphur Dioxide 125 µg/m3, not to be exceeded more 24-hour mean (SO2) than 3 times a year 266 µg/m3, not to be exceeded more 15-minute mean than 35 times a year
4 The units are in microgrammes of pollutant per cubic metre of air (µg/m3).
LAQM Annual Status Report 2017 50 Sedgemoor District Council
Glossary of Terms
Abbreviation Description
AQAP Air Quality Action Plan - A detailed description of measures, outcomes, achievement dates and implementation methods, showing how the local authority intends to achieve air quality limit values’
AQMA Air Quality Management Area – An area where air pollutant concentrations exceed / are likely to exceed the relevant air quality objectives. AQMAs are declared for specific pollutants and objectives
ASR Air quality Annual Status Report
Defra Department for Environment, Food and Rural Affairs
DMRB Design Manual for Roads and Bridges – Air quality screening tool produced by Highways England
EU European Union
FDMS Filter Dynamics Measurement System
LAQM Local Air Quality Management
NO2 Nitrogen Dioxide
NOx Nitrogen Oxides
PM10 Airborne particulate matter with an aerodynamic diameter of 10µm (micrometres or microns) or less
PM2.5 Airborne particulate matter with an aerodynamic diameter of 2.5µm or less
QA/QC Quality Assurance and Quality Control
SO2 Sulphur Dioxide
LAQM Annual Status Report 2017 51 Sedgemoor District Council
References NO2 Fall-Off with Distance Calculator (Version 4.1)1
Estimated Background Air Pollution Maps (base year 2013), downloaded from http://uk-air.defra.gov.uk/data/laqm-background-home
LAQM Annual Status Report 2017 52