2010 Air Quality Progress Report for Wrexham County Borough Council

Wrexham County Borough Council April 2010

In fulfillment of Part IV of the Environment Act 1995 Local Air Quality Management

April 2010

Progress Report i April 2010 Wrexham County Borough Council

Local Paul Campini Authority Officer

Department Housing and Public Protection Address Wrexham County Borough Council High Street Ruabon Wrexham LL14 6NH Telephone 01978 813726 e-mail [email protected]

Report WCBC_PR_2009 Reference number Date April 2010

ii Progress Report Wrexham County Borough Council April 2010

Executive Summary

This Updating and Screening assessment has considered the seven health based Air Quality objectives as laid down in regulations and whether these levels will be breached currently or by their target dates. If these levels are exceeded a detailed assessment will be required.

Having considered each pollutant and presented evidence to support the assessment of each, it has been concluded that all the Air Quality objectives will be met. There is no requirement for Wrexham County Borough Council (WCBC) to undertake a detailed assessment.

WCBC will continue to maintain its monitoring program to confirm the findings of this report, additionally the diffusion tube co-location study at the Victoria Road network Air Quality station will continue.

Summary table:

Objectives Detailed Assessment Required

Benzene No 1,3-butadiene No Carbon Monoxide No Lead No Nitrogen Dioxide No PM10 No Sulphur Dioxide No

Progress Report iii April 2010 Wrexham County Borough Council

Table of contents

1 Introduction 7 1.1 Description of Local Authority Area 7 1.2 Purpose of Progress Report 7 1.3 Air Quality Objectives 7 1.4 Summary of Previous Review and Assessments 9 2 New Monitoring Data 11 2.1 Summary of Monitoring Undertaken 11 2.2 Comparison of Monitoring Results with Air Quality Objectives 21 3 New Local Developments 33 3.1 Road Traffic Sources 33 3.2 Other Transport Sources 33 3.3 Industrial Sources 33 3.4 Commercial and Domestic Sources 33 3.5 New Developments with Fugitive or Uncontrolled Sources 33 4 Conclusions and Proposed Actions 34 10.1 Conclusions from New Monitoring Data 34 10.2 Conclusions relating to New Local Developments 34 10.3 Other Conclusions Error! Bookmark not defined. 10.4 Proposed Actions 34 5 References 35

iv Progress Report Wrexham County Borough Council April 2010 Appendices Appendix A QA:QC Data Table A1 Organisations who have submitted BAF data for Environmental Service Group Table A2 Nitrogen Dioxide Diffusion tube Annualisation data

Table A3 Annualisation data for Wrexham Isycoed PM10 Monitor Table A4 Results of Wrexham County Borough Council Co-Location Study Table A5 Complete Data Sets for Diffusion Tube monitoring undertaken by Wrexham County Borough Council during 2009 Table A6 Results of Environmental Service Group WASP Scheme List of Tables Table 1.1 Air Quality Objectives Table 2.1 Details of Automatic Monitoring Sites Table 2.2 Details of Non-Automatic Monitoring Sites Table 2.3a Results of Automatic Monitoring for Nitrogen Dioxide: Comparison to Annual Mean Objective Table 2.3b Results of Automatic Monitoring for Nitrogen Dioxide: Comparison to 1-hour Mean Objective Table 2.3c Nitrogen Dioxide Diffusion tube sites with more than Five Years of Monitoring Table 2.4 Results of Nitrogen Dioxide Diffusion Tubes Table 2.4a Nitrogen Dioxide Diffusion Tube sites with Less than 90% Data Capture

Table 2.5a Results of PM10 Automatic Monitoring: Comparison with Annual Mean Objective

Table 2.5b Results of PM10 Automatic Monitoring: Comparison with 24-Hour Mean Objective

Table 2.6 Results of SO2 Automatic Monitoring: Comparison with Objectives

Table 2.6a Results of SO2 Diffusion Tube Monitoring Table 2.7 Results of Benzene Diffusion Tube Monitoring Table 2.8 Results of Ozone Diffusion Tube Monitoring

List of Figures Figure 2.1 Map of Automatic Monitoring Sites Figure 2.2 Maps of Non-Automatic Monitoring Sites Figure 2.3a Trends in Annual Mean Nitrogen Dioxide Concentration Measured at Automatic Monitoring Sites

Progress Report v April 2010 Wrexham County Borough Council Figure 2.3c Trends in Annual Mean Nitrogen Dioxide Concentrations Measured at Diffusion Tube Sites Figure 2.5 Trends in Annual Mean and Number of Exceedences of PM10 Concentrations at Victoria Road. Figure 2.6 Trends in Annual Mean Sulphur Dioxide Concentrations Measured at Diffusion Tube Sites Figure 2.7 Trends in Annual Mean Benzene Concentrations Measured at Diffusion Tube Sites Figure 2.8 Trends in Annual Mean Ozone Concentrations Measured at Diffusion Tube Site

vi Progress Report Wrexham County Borough Council April 2010 1 Introduction

1.1 Description of Local Authority Area

Wrexham County Borough is situated in Northeast Wales. Bounded by the Clwydian Hills to the west and the Shropshire and Powys countryside to the south. Approximately 70% of the County Borough could be properly described as rural where agriculture is the predominant land use. Wrexham is bordered by the Welsh unitary authorities of Flintshire, Denbighshire and Powys, and to the north and east by Chester West and Chester Council, and Shropshire County Council. Wrexham County Borough’s total population (as at 2007) is estimated to be 131,900. Over 80% of people live within defined urban areas, in the centre of Wrexham itself and in the surrounding urban villages. The major road running north to south through the County Borough is the A483.

Wrexham County Borough has several Industrial Estates within its borders the largest of which is located 5 miles to the east of the main town area and contains approximately 220 businesses of which 20 hold either a Local Authority or Environment Agency Environmental Permit.

Wrexham County Borough Council has not needed to declare any Air Quality management Areas to date.

1.2 Purpose of Progress Report

Progress Reports are required in the intervening years between the three-yearly Updating and Screening Assessment reports. Their purpose is to maintain continuity in the Local Air Quality Management (LAQM) process.

They are not intended to be as detailed as Updating and Screening Assessment (USA) Reports, or to require as much effort. However, if the Progress Report identifies the risk of exceedence of an Air Quality Objective, the Local Authority (LA) should undertake a Detailed Assessment immediately, and not wait until the next round of Review and Assessment.

1.3 Air Quality Objectives

The air quality objectives applicable to LAQM in Wales are set out in the Air Quality (Wales) Regulations 2000, No. 1940 (Wales 138), Air Quality (Amendment) (Wales) Regulations 2002, No 3182 (Wales 298), and are shown in Table 1.1. This table shows the objectives in units of microgrammes per cubic metre g/m3 (milligrammes per cubic metre, mg/m3 for carbon monoxide) with the number of exceedences in each year that are permitted (where applicable).

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Table 1.1 Air Quality Objectives included in Regulations for the purpose of Local Air Quality Management in Wales.

Pollutant Date to be Concentration Measured as achieved by Benzene 16.25 µg/m3 Running annual 31.12.2003 mean 5.00 µg/m3 Running annual 31.12.2010 mean

1,3-Butadiene 2.25 µg/m3 Running annual 31.12.2003 mean Carbon monoxide 10.0 mg/m3 Running 8-hour 31.12.2003 mean Lead 0.5 µg/m3 Annual mean 31.12.2004 0.25 µg/m3 Annual mean 31.12.2008 Nitrogen dioxide 200 µg/m3 not to be 1-hour mean 31.12.2005 exceeded more than 18 times a year 40 µg/m3 Annual mean 31.12.2005

3 Particles (PM10) 50 µg/m , not to be 24-hour mean 31.12.2004 (gravimetric) exceeded more than 35 times a year 40 µg/m3 Annual mean 31.12.2004

Sulphur dioxide 350 µg/m3, not to be 1-hour mean 31.12.2004 exceeded more than 24 times a year 125 µg/m3, not to be 24-hour mean 31.12.2004 exceeded more than 3 times a year 266 µg/m3, not to be 15-minute mean 31.12.2005 exceeded more than 35 times a year

8 Progress Report Wrexham County Borough Council April 2010

1.4 Summary of Previous Review and Assessments

The first stage of review and assessment was carried out in 1999 / 2000 and made the following recommendation:

This report has identified two pollutants, particulates (PM10) and Nitrogen dioxide (N02), which may not meet the Air Quality standards, adopted by the Government. It is therefore necessary to carry out a stage 2 review and assessment. This will include the collation of data with regard to traffic emissions and further monitoring of particulates (PM10) and Nitrogen dioxide. The current air quality monitoring carried out as part of Wrexham County Borough Council’s Air Quality Strategy will continue and will be expanded in those areas where further monitoring is required. The methodology will be described within the scope of the second stage review and assessment.

Based on the recommendations of the first round of review and assessment Wrexham County Borough Council proceeded to the second stage of review and assessment, which presented the following conclusion:

The Stage 2 assessment has indicated that background air quality will improve up to 2005 throughout the County Borough. The review and assessment process has demonstrated that the predicted emissions from traffic growth have a limited impact on air quality within Wrexham over the next three years. The predictions were carried out to determine a worst case situation. The exceedence of the PM10 and the N02 objective from road sources is unlikely at any relevant location. This situation will continue to be reviewed annually as part of the air quality strategy and in the event of any proposed major new development. However, it is recognised that future increased traffic growth may challenge air quality in Wales and the rest of the UK and therefore this situation will need ongoing review. The local sources of pollutants for PM10, and SO2 which are considered to require a Stage 3 assessment are not expected to give rise to an exceedence of the air quality objective by 2004 / 2005.

The stage two review and assessment commented that there was insufficient monitoring data to be confident that the Air Quality Objectives would not be breached for PM10 and Sulphur Dioxide (SO2). Hence Wrexham County Borough Council proceeded to the third stage of Review and assessment, which made the following conclusion:

The Stage 3 Assessment has indicated elevated particulate emissions from local domestic coal burning in the village of Llay. The results of the investigation indicate that the air quality standard and objective for particulate emissions in Llay may be exceeded.

The Public Protection Service of Wrexham County Borough Council will recommend the declaration of an Air Quality Management Area for Llay. This will include the production of a Stage 4 Report and the implementation of an Air Quality Action Plan during 2002.

An Air Quality Action Plan was implemented in 2003, which introduced a gas supply into the village of Llay. This had the effect of lowering the PM10 levels in the village and bringing them within the national guideline levels. This removed the need to declare an Air Quality Management Area in Llay.

The Updating and Screening Assessment and addendum completed in 2004 concluded:

Results of the screening assessment have shown that no detailed assessment is required with respect to emissions arising from all sources assessed - predictions of air quality in relevant future years indicate that the current air quality objectives will be met at all receptors in Wrexham County Borough.

The USA also stated that:

WCBC will continue with its monitoring programme to confirm the findings of this report. Further work will be undertaken with respect to the performance of diffusion tubes through the use of triplicate tubes at the continuous roadside-monitoring site.

Progress Report 9 April 2010 Wrexham County Borough Council

The Progress Report completed in 2005 concluded:

That there has not been any change in local circumstances to indicate a possible exceedence of the air quality standards and objectives.

The introduction of a domestic gas supply into the coal-burning region of Llay has had the effect of reducing the PM10 levels, and as a result has improved the Air Quality in the village.

The Updating and Screening Assessment (USA) completed in 2006 concluded that:

No detailed assessment is required with respect to any of the pollutants identified in the Air Quality Strategy and predictions for future years indicate that the Air Quality objectives will be met at all locations in Wrexham County Borough Council.

That there has not been any change in local circumstances to indicate a possible exceedence of the air quality standards and objectives.

That potential changes in local circumstances will most likely relate to increases in traffic (e.g. as a result on increased housing development) at sensitive locations.

The Progress Report completed in 2007 concluded that:

That there has not been any change in local circumstances to indicate a possible exceedence of the air quality standards and objectives.

The Progress Report completed in 2008 also concluded that there has not been a change in local circumstances, which may indicate a possible exceedence.

The last air quality report completed by Wrexham County Borough Council was the Updating and Screening Assessment completed in 2009 and concluded the following:

1) Wrexham County Borough Council has examined the results from its monitoring in the Borough. Concentrations are all below the objectives, therefore there is no need to proceed to a Detailed Assessment for any of the pollutants. 2) Wrexham County Borough Council has examined the likely impacts from local developments: road transport, other transport, industrial installations, commercial/domestic, fugitive emissions, residential and commercial etc, in the Borough. None of which have been identified as likely to exceed the objectives, therefore there is no need to proceed to a Detailed Assessment for any of the sources.

As part of its ongoing Air Quality Strategy, Wrexham County Borough Council proposed the following actions:

As part of its Air Quality Strategy, Wrexham County Borough Council will maintain its monitoring program to which new monitoring sites will be added as the need is identified. Wrexham County Borough Council will also continue with its co-location study in order to correct its diffusion tubes and upload the results of this co-location study to the national monitoring spreadsheet.

The above reports can be accessed at Wrexham County Borough Councils website http://www.wrexham.gov.uk/english/environment/air_quality/index.htm

10 Progress Report Wrexham County Borough Council April 2010

2 New Monitoring Data 2.1 Summary of Monitoring Undertaken

2.1.1 Automatic Monitoring Sites

Wrexham County Borough Council maintained two automatic monitoring sites within the Borough during 2009:

Table 2.1 Details of Automatic Monitoring Sites

Relevant Distance to Exposure? Worst- In kerb of OS Grid Pollutants (Y/N with case Site Name Site Type AQMA nearest road Ref Monitored distance (m) Location ? (N/A if not to relevant ? applicable) exposure)

Victoria Roadside X 349900 NOx, SO2 n/a Y (20m) 5m Y Road Y 332900 & PM10 Wrexham Urban X 350260 NOx, SO2 n/a Y (30m) n/a Y Isycoed Industrial Y 340355 & PM10

Pollutants key: NOx = Oxides of Nitrogen, which is a combination of Nitrogen Oxide (NO) and Nitrogen Dioxide (NO2). SO2 = Sulphur Dioxide PM10 = Particulate matter with a diameter of 10 µm (microns. 1 µm is equal to 1 millionth of a metre)

Further details of the Victoria Road and Wrexham Isycoed sites can be found at: www.welshairquality.co.uk.

The Victoria Road station has been operating since March 2003 and is part of the Automatic Urban and Rural Network (AURN) of stations in the UK, hence the Quality Assurance / Quality Control (QA/QC) of the data is carried out by AEA Technology and Bureau Veritas, who are the environmental consultants contracted by Defra and the Welsh Assembly Government (WAG) to provide this service. These two companies are also responsible for arranging the annual site audit and six monthly service visits. The PM10 monitor is a Partisol daily gravimetric analyser and therefore the data is not subject to any corrections. WCBC maintains a diffusion tube co-location study at this station. The station is located in a car park on the opposite side of the road to the Victoria Road Infants School. So where the above table indicates that it is 20 meters way from the school, it can be taken that the same levels of Nitrogen Dioxide, Sulphur Dioxide and Particulate Matter (10µm) will be experienced at both the School and the Air Quality Station.

The Wrexham Isycoed site has been operating since January 2006 and is located within the school grounds at Isycoed (the nearest school building is 30 meters away). The site is near to the main Industrial Estate in Wrexham. It is part of the Welsh Air Quality Forums (WAQF) network of sites and hence QA/QC of the data is undertaken by AEA as part of their contract with the WAQF. The station is calibrated annually and service every six months by Casella who were the original suppliers of the equipment. This station also includes weather monitoring equipment to allow better analysis of any pollution events which may occur. As is the case with the Victoria Road station, the PM10 monitor is a Partisol daily gravimetric analyser and therefore the data is not subject to any corrections.

Progress Report 11 April 2010 Wrexham County Borough Council

Figure 2.1 Map of Automatic Monitoring Sites

To Chester Development Services Directorate Wrexham County Borough To Mold

3 8 Rossett Ordnance Survey digital mapping with 4 A Marford the permission of the Controller of her Llay Majesty's Stationery Office. Crown A541 Gresford Copyright Reserved. Wrexham County To Nantwich Gwersyllt Holt A Borough Council Licence No. LA09021L Brymbo 5 To Ruthin 1 34 56 A5 Victoria Road Minera Coedpoeth A5 Wrexham Isycoed 25 Wrexham Industrial Est. Rhostyllen Marchwiel A483 Rhosllanerchrugog Bangor-is-y-coed

8 2 9 Ruabon 5 A53 A A5 25 To Llangollen Froncysyllte Overton

5 Penley 9 A 53 5 2 A 8 Hanmer Glyn Ceiriog Chirk 95 A4

Bettisfield Pentre A5 LLanarmon To Oswestry DC

12 Progress Report Wrexham County Borough Council April 2010

2.1.2 Non-Automatic Monitoring

Wrexham County Borough Council maintains a diffusion tube network of 22 tubes, which include diffusion tubes for Nitrogen Dioxide (NO2), Sulphur Dioxide (SO2), Benzene (C6H6) and Ozone (O3):

Table 2.2 Details of Non- Automatic Monitoring Sites

Relevant Distance to Exposure? Worst- In kerb of Pollutants (Y/N with case Site Name Site Type OS Grid Ref AQMA nearest road Monitored distance (m) Location ? (N/A if not to relevant ? applicable) exposure)

Grosvenor Rd, Roadside X 350600 NO2 n/a N 5m Y Wrexham Y 333200 Chester Street, Intermediate X 350500 NO2 n/a N n/a n/a Wrexham Y 333600 Redwither, Intermediate X 350137 NO2 n/a N n/a n/a Wrexham Y 338442 Industrial Estate Plas Madoc, Urban X 343300 NO2 n/a Y (10) n/a Y Cefn Mawr Background Y 328700 Ceiriog School, Suburban X 338300 NO2 n/a Y (25) (60) 2m Y Chirk Y 329300 Gardden View, Roadside X 344600 NO2 n/a Y (15) 7m Y Ruabon Y 330300 Hugmore Lane, Roadside X 351800 NO2 n/a Y (15) 2m Y Wrexham Y 337700 Industrial Estate Old Farm Rd, Roadside X 349000 NO2 n/a Y (40) 2m Y Rhostyllen Y 332000 Mold Rd, Roadside X 351000 NO2 n/a Y (30) 7m Y Wrexham Y 332600 Chester Rd, Intermediate X 352900 NO2 n/a Y (16) 3m Y Wrexham Y 333700 Holt Rd, Roadside X 350700 NO2 n/a Y (30) 2m Y Wrexham Y 334100 Holyhead Rd, Intermediate X 338700 NO2 n/a Y (55) (30) 30m Y Chirk Y 328900 The Sycamores, Roadside X 353222 NO2 n/a Y (25) n/a Y Chester Road Y 333887

Rhostyllen Roadside X 348170 NO2 n/a Y (35) 4m Y Roundabout, Y 330950 Wrexham (A483)

Bus Station, Roadside X 350590 NO2 n/a N 2m Y Wrexham Y 333350

Smithfield Road Roadside X 333981 NO2 n/a Y (4) 1m Y Y 350171

Llwyneinion Rd Urban X 347400 C6H6 n/a N n/a n/a Rhosllanerchrugog Background Y 328700 Grosvenor Rd, Roadside X 350600 C6H6 n/a N 5m Y Wrexham Y 333200

Progress Report 13 April 2010 Wrexham County Borough Council

Llay Estate Intermediate X 355749 SO2 n/a Y (25) n/a Y Office, Llay Y 333122 Intermediate X 353700 SO n/a Y (30) 2m Y Blast Rd, Brymbo 2 Y 329400 Maes-y-Waun, Suburban X 338100 SO2 n/a Y (2) 15m Y Chirk Y 329140

Maes-y-Waun, Suburban X 338100 O3 n/a Y (2) 15m Y Chirk Y 329140

The diffusion tubes used by Wrexham County Borough Council are supplied by Environmental Services Group (ESG – ex Bureau Veritas) who use the 20% Trietholamine (TEA) in water method of preparation for the Nitrogen Dioxide tubes. ESG have also stated that they follow the methods set out in the Harmonisation Practical Guidance. ESG also took part in the Workplace Analysis Scheme for Proficiency (WASP) scheme for 2009 where they were they achieved results between CAT 1 (Good) and CAT 2 (Acceptable). The results are shown in Appendix A Table A6.

Since 2004 Wrexham County Borough Council carried out its own co-location study at the Victoria Road AURN station. Where reporting time has allowed, the results of this study have been uploaded onto the Review and Assessment helpdesk spreadsheet. This website has given a Bias Adjustment Factor (BAF) of 0.81 as an average for the eight authorities who submitted their co-location studies for ESG in 2009. It is this value that has been applied to the Nitrogen Dioxide diffusion tubes that Wrexham County Borough Council used in 2009.

Appendix A shows details of Wrexham County Borough Councils Co-Location study and laboratory details.

The table below discuses the locations of the diffusion tubes in relation to sensitive receptors.

14 Progress Report Wrexham County Borough Council April 2010

Table 2.2a Details of Non- Automatic Monitoring Sites and sensitive Receptors

Relevant Exposure? Pollutants (Y/N with Comments Site Name Site Type Monitored distance (m) to relevant exposure)

Grosvenor Rd, Roadside NO2 N A busy road during the rush hours though contains Wrexham no sensitive receptors. Monitoring undertaken for comparative purposes and in the event of a planning application for a sensitive receptor. Chester Street, Intermediate NO2 N No sensitive receptors. Wrexham Redwither, Intermediate NO2 N No sensitive receptors. Diffusion tube serves as a Wrexham useful comparator to the Air Quality monitoring Industrial Estate station. Plas Madoc, Urban NO2 Y (10) The diffusion tube is situated within a large Cefn Mawr Background residential estate. Ceiriog School, Suburban NO2 Y (25) The diffusion tube is located on a roadside near the Chirk school, though the closet receptor is on the opposite side of the road 25 metres from the tube. The School building is 60 metres away and the playing fields some 30 metres away from the tubes location. The tubes is located an equivalent distance back from the roadside as the domestic property is on the opposite side of the road. Gardden View, Roadside NO2 Y (15) The diffusion tube is located on the side of the main Ruabon road approaching the village. Hugmore Lane, Roadside NO2 Y (15) This is one of the main roads onto the Wrexham Wrexham Industrial Estate and hence experiences large Industrial Estate volumes of traffic. The tube is located at the boundary of a residential properties garden. Old Farm Rd, Roadside NO2 Y (40) The diffusion tube is located on the side of the main Rhostyllen road through the village. Mold Rd, Roadside NO2 Y (30) The diffusion tube is located at the boundary of the Wrexham car park for the university. This is one of the main access roads into the town of Wrexham. Chester Rd, Intermediate NO2 Y (16) The diffusion tube is located on the side of a main Wrexham route from the A483 into Wrexham town. Holt Rd, Roadside NO2 Y (30) The nearest receptor is 30 metres away from the Wrexham tube on the opposite side of the road but is the same distance from the roadside as the tube is and is therefore exposed to equivalent levels Holyhead Rd, Intermediate NO2 Y (55) (30) The nearest receptor is 55 metres away from the Chirk tube on the opposite side of the road. Though is approximately the same distance back from the road as the diffusion tube approximately 20 meters from the roadside. The Sycamores, Roadside NO2 Y (25) The diffusion tube is located within the garden area Chester Road of a block of flats that is next to the A483. The tube is located on the filter lane said of the property and is a useful comparator to the Chester Road diffusion tube which is 320 metres away. Rhostyllen Roadside NO2 Y (35) Diffusion tube is on the opposite side of the road Roundabout, some 35 metres away from nearest receptor. Though the tube is an equivalent distance back from Wrexham (A483) the roadside as the property on the other side of the road. Bus Station, Roadside NO2 N Diffusion tube is located at the bus station in Wrexham Wrexham town.

Smithfield Road Roadside NO2 Y (4) The diffusion tube is located at the garden boundary of a property near the entrance/ exit to the car park at the new Eagles Meadow Arcade.

Progress Report 15 April 2010 Wrexham County Borough Council

Relevant Exposure? Pollutants (Y/N with Comments Site Name Site Type Monitored distance (m) to relevant exposure)

Llwyneinion Rd Urban C6H6 N Diffusion tube is located near an acid tar lagoon to Rhosllanerchrugog Background monitor hydrocarbon levels. Roadside C6H6 N A busy road during the rush hours though contains Grosvenor Rd, no sensitive receptors. Monitoring undertaken for Wrexham comparative purposes and in the event of a planning application for a sensitive receptor.

Intermediate SO Y (25) Diffusion tube is located at the garden boundary of a Llay Estate 2 domestic property in an area that historically had Office, Llay domestic coal burning. Intermediate SO2 Y (30) The diffusion tube is located near an area that underwent major remediation involving large Blast Rd, Brymbo numbers of heavy vehicles. The diffusion tube was placed to monitor any emissions. Suburban SO Y (2) Diffusion tube is located in the garden of a domestic Maes-y-Waun, 2 property in an area that historically had domestic Chirk coal burning.

Suburban Y (2) Diffusion tube is located in the same garden as the Maes-y-Waun, O3 SO tube. This area was also seen as Chirk 2 representative of Ozone levels for the Borough

16 Progress Report Wrexham County Borough Council April 2010

Figure 2.2 Maps of Non-Automatic Monitoring Sites

To Chester BenzeneDevelopment diffusion tubes Services Monitoring Directorate locations To Mold Wrexham County Borough

A52 Wrexham 5 Wrexham Llwyneinion Industrial Est. Road Rhostyllen Marchwiel A483 Rhosllanerchrugog Bangor-is-y-coed

8 2 5 9 Ruabon A53 A A 5 25 To Llangollen Froncysyllte Overton A

5 Penley 9 A 53 5 2 A 8 Hanmer Glyn Ceiriog Chirk 5 A49

Bettisfield Pentre A5

LLanarmon To Oswestry DC

Wrexham County Borough ORDNANCE SURVEY DIGITAL MAPPING WITH THE PERMISSION OF THE CONTROLLER OF HER MAJESTY'S STATIONERY OFFICE. CROWN COPYRIGHT RESERVED. WREXHAM COUNTY BOROUGH

Progress Report 17 April 2010 Wrexham County Borough Council

To Chester Development Services Directorate Nitrogen Dioxide diffusion tubes Monitoring locations The Sycamores Wrexham County Borough To Mold

3 8 Rossett Ordnance Survey digital mapping with 4 A Marford the permission of the Controller of her Llay Rhostyllen Roundabout (A483) Majesty's Stationery Office. Crown Old Farm Road A541 Gresford Copyright Reserved. Wrexham County To Nantwich Gwersyllt Holt A Chester Street, Borough Council Licence No. LA09021L Brymbo 5 To Ruthin 15 534 Holt Road 6 A Chester Road Minera Coedpoeth Mold Road A525 Wrexham Grosvenor Road Wrexham Victoria Road Gardden View Industrial Est. King Street Rhostyllen Marchwiel Smithfield Road A483 Redwither Tower Rhosllanerchrugog Hugmore Lane Bangor-is-y-coed

8 2 Plas Madoc Estate Office 5 9 Ruabon A53 A A 5 25 To Llangollen Froncysyllte Overton

A 5 Penley 9 A 53 5 2 A 8 Hanmer Glyn Ceiriog Chirk 495 A Ceiriog School Bettisfield Pentre Holyhead Road A5 LLanarmon To Oswestry DC

Wrexham County Borough ORDNANCE SURVEY DIGITAL MAPPING WITH THE PERMISSION OF THE CONTROLLER OF HER MAJESTY'S STATIONERY OFFICE. CROWN COPYRIGHT RESERVED. WREXHAM COUNTY BOROUGH

18 Progress Report Wrexham County Borough Council April 2010

To Chester Ozone diffusion tubes Monitoring locations Development Services Directorate To Mold Wrexham County Borough 3 8 Rossett Ordnance Survey digital mapping with 4 A Marford the permission of the Controller of her Llay Majesty's Stationery Office. Crown A541 Gresford Copyright Reserved. Wrexham County To Nantwich Gwersyllt Holt A Borough Council Licence No. LA09021L Brymbo 5 To Ruthin 1 34 56 A5 Minera Coedpoeth A 525 Wrexham Wrexham Industrial Est. Rhostyllen Marchwiel A483 Rhosllanerchrugog Bangor-is-y-coed

8 2 9 Ruabon 5 A53 A A 52 Overton 5 To Llangollen Froncysyllte A

5 Penley 9 A 53 5 2 A 8 Hanmer Glyn Ceiriog Chirk 495 A Maes-y-Waun Bettisfield Pentre A5 LLanarmon To Oswestry DC

Wrexham County Borough ORDNANCE SURVEY DIGITAL MAPPING WITH THE PERMISSION OF THE CONTROLLER OF HER MAJESTY'S STATIONERY OFFICE. CROWN COPYRIGHT RESERVED. WREXHAM COUNTY BOROUGH

Progress Report 19 April 2010 Wrexham County Borough Council

To Chester Sulphur Development Dioxide diffusion Services tubes Monitoring Directorate locations

Wrexham County Borough To Mold

3 8 Rossett Ordnance Survey digital mapping withLlay Estate Office 4 A Marford the permission of the Controller of her Llay Majesty's Stationery Office. Crown A541 Gresford Copyright Reserved. Wrexham County To Nantwich Gwersyllt Holt A Borough Council Licence No. LA09021L Brymbo 5 To Ruthin 1 34 56 A5 Minera Coedpoeth A 525 Wrexham Blast Road Wrexham Industrial Est. Rhostyllen Marchwiel A483 Rhosllanerchrugog Bangor-is-y-coed

8 2 9 Ruabon 5 A53 A A 5 25 To Llangollen Froncysyllte Overton

5 Penley 9 A 53 5 2 A 8 Hanmer Glyn Ceiriog Chirk 95 A4

Maes-y-Waun Bettisfield Pentre A5 LLanarmon To Oswestry DC

Wrexham County Borough ORDNANCE SURVEY DIGITAL MAPPING WITH THE PERMISSION OF THE CONTROLLER OF HER MAJESTY'S STATIONERY OFFICE. CROWN COPYRIGHT RESERVED. WREXHAM COUNTY BOROUGH

20 Progress Report Wrexham County Borough Council April 2010

2.2 Comparison of Monitoring Results with Air Quality Objectives

The following section shows the results of the monitoring or assessment undertaken by Wrexham County Borough Council in 2009 for each of the pollutants identified in the Air Quality Objectives.

2.2.1 Nitrogen Dioxide

Nitrogen Dioxide is monitored for at two automatic sites and sixteen diffusion tube sites in Wrexham County Borough.

Automatic Monitoring Data

Table 2.3a Results of Automatic Monitoring for Nitrogen Dioxide: Comparison with Annual Mean Objective

Data Annual mean concentrations Capture (g/m3) for full Within Site ID Location calendar AQMA? year 2007 2008 2009 2009 %

AURN Victoria Road n/a 98.50 19.6 20.3 21.3 WI Isycoed n/a 97.61 9.1 9.8 8.8

Figure 2.3 Trends in Annual Mean Nitrogen Dioxide Concentration Measured at Automatic Monitoring Sites.

The chart below shows the Nitrogen Dioxide Trend levels at the Victoria Road AURN site. As there is less than five years worth of data for the Isycoed site, no trend chart is shown for this.

Nitrogen Dioxide Trend levels at Wrexham AURN

15 Levels µgm³

2 10

NO 5

0 2002 2003 2004 2005 2006 2007 2008 2009 Monitoring Year

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The above chart shows that the annual mean Nitrogen Dioxide levels recorded at Victoria road have been consistent over the eight years of monitoring.

Table 2.3b Results of Automatic Monitoring for Nitrogen Dioxide: Comparison with 1-hour Mean Objective

Data Number of Exceedences of Data Capture hourly Capture for for full mean (200 g/m3) Within Site ID Location monitoring calendar AQMA? period year % 2009 2007 2008 2009 %

AURN Victoria Road n/a 98.50 98.50 0 0 0 WI Isycoed n/a 97.61 97.61 0 0 0

From the Nitrogen Dioxide tube details shown in Table 2.2 (Details of Non- Automatic Monitoring Sites), fifteen of the tubes have been monitoring for five or more years:

Table 2.3c Nitrogen Dioxide Diffusion tube sites with more than Five Years of Monitoring

Site Start Date

Grosvenor Road May 1996 Crown Buildings May 1996 Ceiriog School June 1997 Redwither Nov 1998 Plas Madoc Jan 2000 Gardden View May 2000 Plas Madoc Jan 2002 Hugmore Lane Jan 2002 Rhostyllen Jan 2002 Mold Road Jan 2002 Chester Road Jan 2002 Holt Road Jan 2002 Holyhead Road Jan 2002 The Sycamores Feb 2004 Rhostyllen Roundabout Feb 2004

The charts below show the results trends for the above fifteen locations:

22 Progress Report Wrexham County Borough Council April 2010

Figure 2.4 Trends in Annual Mean Nitrogen Dioxide Concentration Measured at Diffusion Tube Monitoring Sites.

Annual Mean Nitrogen Dioxide levels at Annual Mean Nitrogen Dioxide levels at Grosvenor Road Crown Buildings

40 40 30 30

20 20 Levels µgm³ Levels µgm ³ 10 10 2 2 NO NO 0 0 1997 1999 2001 2003 2005 2007 2009 1997 1999 2001 2003 2005 2007 2009 Monitoring Year Monitoring Year

Annual Mean Nitrogen Dioxide levels at Annual Mean Nitrogen Dioxide levels at Ceiriog School Redwither Tower

40 40

30 30 20 20 10 Levelsµgm³ 2 Levels Levels µgm³ 10 0 2 NO NO 0 97 98 99 00 01 02 03 04 05 06 19 19 19 20 20 20 20 20 20 20 2007 2008 2009 1997 1999 2001 2003 2005 2007 2009 Monitoring Year Monitoring Year

Annual Mean Nitrogen Dioxide levels at Annual Mean Nitrogen Dioxide levels at Plas Madoc Gardden View

40 40

30 30

20 20 Levels µgm³ Levels µgm³ 10 10 2 2 NO NO 0 0 1997 1999 2001 2003 2005 2007 2009 1997 1999 2001 2003 2005 2007 2009 Monitoring Year Monitoring Year

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Annual Mean Nitrogen Dioxide levels at Annual Mean Nitrogen Dioxide levels at Hugmore Lane Rhostyllen

40 40

30 30

20 20 L evels µg m ³ Levels µgm Levels ³ 10

10 2 2 NO NO 0 0 1997 1999 2001 2003 2005 2007 2009 1997 1999 2001 2003 2005 2007 2009 Monitoring Year Monitoring Year

Annual Mean Nitrogen Dioxide levels at Annual Mean Nitrogen Dioxide levels at Mold Road Chester Road

40 40

30 30

20 20 Levels µgm Levels ³ Levels µgm Levels ³

10 2 10 2 NO NO 0 0 1997 1999 2001 2003 2005 2007 2009 1997 1999 2001 2003 2005 2007 2009 Monitoring Year Monitoring Year

Annual Mean Nitrogen Dioxide levels at Annual Mean Nitrogen Dioxide levels at Holt Road Holyhead Road

40 40

30 30

20 20 Levels µgm Levels ³ µgm Levels ³

2 10 2 10

NO 0 NO 0 1997 1999 2001 2003 2005 2007 2009 1997 1999 2001 2003 2005 2007 2009 Monitoring Year Monitoring Year

Annual Mean Nitrogen Dioxide levels at Annual Mean Nitrogen Dioxide levels at The Sycamores Rhostyllen Rbt

40 40

30 30

20 20 Levels µgm Levels ³ Levels µgm Levels ³ 2

2 10 10 NO NO 0 0 1997 1999 2001 2003 2005 2007 2009 1997 1999 2001 2003 2005 2007 2009 Monitoring Year Monitoring Year

24 Progress Report Wrexham County Borough Council April 2010

Annual Mean Nitrogen Dioxide levels at Bus Station

20 Levels µgm Levels ³

2 10 NO 0 1997 1999 2001 2003 2005 2007 2009 Monitoring Year

Diffusion Tube Monitoring Data

The following two tables show a summary of the Nitrogen Dioxide diffusion tube monitoring undertaken by Wrexham County Borough Council during 2008. The complete dataset for 2009 is shown in Appendix A Table A5.

As discussed above in section 2.1.2 Non Automatic Monitoring, a Bias Adjustment Factor of 0.81 has been applied to the annual means for Nitrogen Dioxide.

Table 2.4 Results of Nitrogen Dioxide Diffusion Tubes

Data Annual mean concentrations Data Capture 3 Capture for (g/m ) for full Within monitoring Site ID Location calendar AQMA? period year 2009 2007 2008 2009 2009 % %

Grosvenor Road, WCBC1 n/a 100 100 24.1 33.7 35.2 Wrexham Chester Street, WCBC2 n/a 83 83 17.6 19.2 19.8 Wrexham Redwither, n/a 92 92 15.7 WCBC12 Wrexham Industrial 11.6 13.0 Estate Plas Madoc, WCBC11 n/a 100 100 10.3 10.0 11.3 Cefn Mawr Ceiriog School, n/a 58 58 17.5 WCBC10 14.9 13.3 Chirk (18.4) Gardden View, n/a 75 75 20.5 WCBC15 16.6 18.8 Ruabon (21.5) Hugmore Lane, n/a 83 83 20.7 WCBC17 Wrexham Industrial 19.6 20.9 Estate Old Farm Road, WCBC18 n/a 100 100 17.7 19.4 21.2 Rhostyllen Mold Road, WCBC19 n/a 92 92 18.7 24.1 24.9 Wrexham Chester Road, WCBC20 n/a 83 83 27.9 30.2 34.1 Wrexham Holt Road, WCBC21 n/a 100 100 26.8 23.2 23.1 Wrexham

Progress Report 25 April 2010 Wrexham County Borough Council

Holyhead Road, WCBC22 n/a 100 100 19.5 15.4 19.4 Chirk The Sycamores, n/a 83 83 30.5 WCBC28 Chester Road 30.3 29.8 Rhostyllen n/a 75 75 27.7 Roundabout, WCBC30 37.3 28.6 (28.5) Wrexham (A483) Bus Station, n/a 100 100 35.8 WCBC31 Wrexham 31.5 34.4 Smithfield Road n/a 100 67 n/a n/a 21.4 WCBC33 Wrexham (23.8)

The above table shows Smithfield Road (WCBC33) as having a 100% data capture for the monitoring period but only a 67% data capture for the monitoring year. Monitoring did not start at Smithfield Road until May 2009, as it was identified as a monitoring location as it is situated near the main car park entrance / exit to Wrexham’s new Eagles Meadow shopping arcade.

The above results have been Bias Adjustment Factor (BAF) corrected using the following BAF’s:

For 2007 = 0.9 For 2008 = 0.83 For 2009 = 0.81

Where there is only data for nine months or less, the results have been ‘annualised’ as per the instructions in box 3.2 of the Technical Guidance manual LAQM.TG(09). The annualising was done by comparison with the two automatic monitoring sites located in Wrexham. These Annualised values are shown in parenthesis in the above table. Further details are provide in Appendix A Table A2.

The following sites have a danger capture of less than 90% for the monitoring year:

Table 2.4a Nitrogen Dioxide Diffusion Tube sites with Less than 90% Data Capture

Site ID Location

WCBC2 Chester Street, Wrexham WCBC10 Ceiriog School, Chirk WCBC15 Gardden View, Ruabon WCBC17 Hugmore Lane, Wrexham WCBC20 Chester Road, Wrexham WCBC28 The Sycamores, Wrexham WCBC30 Rhostyllen Rbt, Wrexham WCBC33 Smithfield Road, Wrexham

With the exception of Smithfield Road, where monitoring did not start until May 2009, the reasons for this could be data lost during analysis or the diffusion tube damaged or stolen during exposure.

All the above charts and are showing a reasonable level of consistency over the monitoring periods. Each chart also shows that none of the monitoring sites have exceeded the Air

26 Progress Report Wrexham County Borough Council April 2010

Quality objectives at any point over the monitoring period. These results show that there is no need to proceed to a detailed assessment for Nitrogen Dioxide.

2.2.2 PM10

Wrexham County Borough Council operated two PM10 monitors during 2009. Both of which were Partisol PM10 monitor’s which are gravimetric and therefore meet the European equivalence testing requirement. The data is not subject to any correction,

Table 2.5a Results of PM10 Automatic Monitoring: Comparison with Annual Mean Objective

Data Annual mean concentrations Data Capture (g/m3) Capture for for full Within Site ID Location monitoring calendar AQMA? period year 2007 2008 2009 % 2009 %

AURN Victoria Road n/a 91.5 91.5 19.6 20.3 15.2 18.2 WI Isycoed n/a 55.6 55.6 9.1 9.8 (23.6)

The low capture that the Isycoed monitoring site experienced was due to several failures of the pump throughout the 2009 monitoring period. The mean concentration has been ‘annualised’ as per the instructions in box 3.2 of the Technical guidance LAQM.TG(09), and is shown in parenthesis. The annualising was done by comparison to the AURN automatic monitoring site detailed on the table above. Further details of the annualising are shown in Appendix A table A3.

Table 2.5b Results of PM10 Automatic Monitoring: Comparison with 24-hour Mean Objective

Data Data Number of Exceedences of Within Capture for Capture daily mean objective Site ID Location monitoring (50 g/m3) AQMA? period 2009 % % 2007 2008 2009

AURN Victoria Road n/a 91.5 91.5 22 15 4 WI Wrexham Isycoed n/a 55.6 55.6 16 (38.8) 15 (41.3) 0 (27.1)

As the objective level for excedences of the daily mean objective is less than 35 the above tables show that there were no exceedences on any of the years shown.

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Figure 2.5 Trends in Annual Mean and Number of Exceedences of Particulate Matter (PM10) Concentrations Measured at Victoria Road AURN site.

Annual Mean and Exceedences of PM10 at Victoria Road

40 of

o 35

30 Number of 25 Exceedences of 50µgm² µgm³ / N µgm³ Annual mean PM10 10 20 Level µgm³ 15

Exceedences 10 5

Levels of PM 0 2002 2003 2004 2005 2006 2007 2008 2009 Monitoring Year

Note, no chart has been produced for Isycoed as it has not yet been monitoring for five years.

Both the actual values recorded for annual mean concentrations and number of exceedences show that the Air Quality Objectives were only exceeded in 2003. Details of that year as results can be found in the 2003 Updating and Screening Assessment and Addendum, which can be accessed on the Wrexham County Borough Council web site under Air Quality. Where the Data Capture for the year was below 90% the 90th percentile is shown, which also didn’t exceed 50 µgm³ and hence there is no requirement to proceed to a detailed assessment for PM10.

In December 2009 a PM2.5 monitor was installed at the AURN site on Victoria Road. Insufficient data exists to provide any meaningful analysis in this report. Though the next progress report will include any results received.

28 Progress Report Wrexham County Borough Council April 2010

2.2.3 Sulphur Dioxide

Wrexham County Borough Council has two automatic Sulphur Dioxide (SO2) monitors and four diffusion tubes. One of the diffusion tubes is co-located at the Victoria Road AURN station to act as a comparison to the automatic monitor.

Table 2.6 Results of SO2 Automatic Monitoring: Comparison with Objectives

Within Number of Exceedences of: AQMA 3 Data Data (g/m ) Site Capture for Capture 15-minute 1-hour 24-hour Location monitoring period 2009 Objective Objective Objective % % (266 (350 (125 g/m3) g/m3) g/m3)

AURN Victoria Road n/a 93.7 93.7 0 0 0 WI Isycoed n/a 95.8 95.8 0 0 0

Table 2.6a Results of Sulphur Dioxide Diffusion Tubes

Data Annual mean concentrations Within Capture 3 Site ID Location (g/m ) AQMA? 2009 % 2007 2008 2009

WCBC23 Llay n/a 92 2.70 1.30 1.3 WCBC24 Brymbo n/a 100 1.21 3.22 0.9 WCBC25 Chirk n/a 100 2.65 1.39 1.9 AURN Victoria Rd, Wrexham n/a 100 2.13 1.18 0.9

Victoria Rd, AURN n/a 93.7 2.82 4.14 2.1 Continuous monitor

The last row on the above table shows the equivalent annual mean at the Victoria Road continuous monitor and is included for comparative purposes. Though there is no provision with the Air Quality Objectives for annual Sulphur Dioxide levels, this exercise serves as a useful indicator to show whether other locations within Wrexham County Borough require more accurate monitoring. The above table demonstrates that this is not the case.

All of the above monitoring locations have been used for in excess of five years and so trend graphs can be generated:

Progress Report 29 April 2010 Wrexham County Borough Council

Figure 2.6 Trends in Annual Mean Sulphur Dioxide Concentrations Measured at Diffusion Tube Sites

Annual Mean Sulphur Dioxide levels at Annual Mean Sulphur Dioxide levels at Llay Brymbo

20 8

15 6

10 4 Levels Levels µgm³ Levelsµgm³ 5 2 2 2 SO SO 0 0 2001 2002 2003 2004 2005 2006 2007 2008 2009 2001 2002 2003 2004 2005 2006 2007 2008 2009 Monitoring Year Monitoring Year

Annual Mean Sulphur Dioxide levels at Annual Mean Sulphur Dioxide levels at Chirk Victoria Rd

10 6 8 5 4 6 Diffusion 3 Tube 4 2 Automatic Levels µgm³ Levels µgm³ Levels 2 2 2 1 Monitor SO SO 0 0 2001 2002 2003 2004 2005 2006 2007 2008 2009 2001 2003 2005 2007 2009 Monitoring Year Monitoring Year

The annual Sulphur Dioxide levels recorded at the Victoria Road AURN site are shown on the Victoria Road chart for comparison purposes.

None of the values shown in the above tables exceed the Air Quality Objective levels. The diffusion tube monitoring also indicates that more detailed monitoring isn’t required at these locations.

2.2.4 Benzene

Wrexham County Borough Council maintains two diffusion tubes for monitoring Benzene.

Table 2.7a Results of Benzene Diffusion Tubes

Data Annual mean concentrations Within Capture 3 Site ID Location (g/m ) AQMA? 2009 % 2007 2008 2009

WCBC08 Grosvenor Rd n/a 92 0.8 0.8 0.8 WCBC26 Llwyneinion Rd (Rhos) n/a 92 0.4 0.4 0.5

As both sites have been monitored at for in excess of five years a chart can be created showing the trends in the monitoring:

30 Progress Report Wrexham County Borough Council April 2010 Figure 2.7 Trends in Annual Mean Benzene Concentrations Measured at Diffusion Tube Sites

Annual Mean Benzene Levels

5 4

3 Rhos 2 Wrexham 1 0 Benzene Level µgm³ 1996 1998 2000 2002 2004 2006 2008 2010 Monitoring Year

The above tables show that the recorded Benzene levels in Wrexham County Borough do not exceed the Air Quality Objective. Hence there is no requirement to proceed to a detailed assessment for Benzene.

2.2.5 Other pollutants monitored

Wrexham County Borough Council also monitors for Ozone with one diffusion tube:

Table 2.8a Results of Ozone Diffusion Tubes

Data Annual mean concentrations Within Capture 3 Site ID Location (g/m ) AQMA? 2009 % 2007 2008 2009

WCBC25 Chirk n/a 100 60.7 75.5 69.7

Whereas Ozone is not included in the Air Quality Objectives, Wrexham County Borough Council is of the opinion that there is a benefit in monitoring Ozone levels within the County Borough. The follow chart shows the trends in Ozone levels:

Figure 2.8 Trends in Annual Mean Ozone Concentrations Measured at Diffusion Tube Site

Annual Mean Ozone Levels

Ozone Level µgm³ 0 1995 2000 2005 2010 Monitoring Year

Progress Report 31 April 2010 Wrexham County Borough Council

2.2.6 Summary of Compliance with AQS Objectives

Wrexham County Borough Council has examined the results from monitoring in the Borough. Concentrations are all below the objectives, therefore there is no need to proceed to a Detailed Assessment.

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3 New Local Developments 3.1 Road Traffic Sources

There were no new or newly identified road traffic sources identified within Wrexham County Borough during 2009.

3.2 Other Transport Sources

There were no new or newly identified non-road traffic sources within Wrexham County Borough during 2009.

3.3 Industrial Sources

There were no new or newly identified Industrial sources within Wrexham County Borough during 2009. 3.4 Commercial and Domestic Sources

There were no new or newly identified Commercial or Domestics sources within Wrexham County Borough during 2009.

3.5 New Developments with Fugitive or Uncontrolled Sources

There were no new or newly New Developments with Fugitive or Uncontrolled Sources within Wrexham County Borough during 2009.

Wrexham County Borough Council confirms that there are no new or newly identified local developments which may have an impact on air quality within the Local Authority area.

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4 Conclusions and Proposed Actions

4.1 Conclusions from New Monitoring Data

Wrexham County Borough Council has examined the results from its monitoring in the borough during 2009. Concentrations are all below the objectives, therefore there is no need to proceed to a Detailed Assessment for any of the pollutants. 4.2 Conclusions relating to New Local Developments

Wrexham County Borough Council did not identify any new local developments in 2009 which could impact on Air Quality. 4.3 Proposed Actions

Neither the monitoring carried out in Wrexham County Borough nor did the consideration of other sources identify an exceedence or a likely exceedence of the Air Quality Objectives. There is no requirement for Wrexham County Borough Council to proceed to a detailed assessment for any of the pollutants.

It is planned that during 2010 Wrexham County Borough will undertake a comprehensive review of its existing diffusion tube network. Details of this review will be published as part of the 2011 Progress Report.

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5 References

Previous reports for Review and Assessment carried out by Wrexham County Borough Council can be viewed on the following web site:

http://www.wrexham.gov.uk/english/environment/air_quality/reports.htm

Progress Report 35 April 2010 Wrexham County Borough Council

Appendices

Appendix A: QA:QC Data

Diffusion Tube Bias Adjustment Factors

Appendix A: QA/QC Data Nitrogen Dioxide diffusion tube analysis laboratory details

Test laboratory:

Environmental Services Group Ltd 139 Summerlee Street Queenslie Glasgow G33 4DB

Quality Control:

UKAS accredited for Nitrogen Dioxide diffusion tube analysis.

Tube preparation method:

20% Triethanolamine (TEA ) in water. Latest round of the WASP scheme for 2008 were all category 1 (good) or 2 (acceptable) results.

Where reporting time has allowed, the results of Wrexham County Borough Councils co-location study have been up loaded onto the Review and Assessment helpdesk. This website has given a Bias Adjustment Factor (BAF) of 0.81 as an average for all authorities who submitted their co-location studies for Environmental Services Group in 2009. It is this value that has been applied to the Nitrogen Dioxide diffusion tubes that Wrexham County Borough Council used in 2009.

Factor from Local Co-location Studies

Wrexham County Borough Councils own collocation study is carried out at the Victoria Road AURN station and for 2009 gave a Bias Adjustment Factor (BAF) of 0.853. This value was submitted to the Review and Assessment helpdesk along with co location studies from seven other Authorities and labs. The table below shows the results from these organisations:

Table A1 Organisations who have submitted BAF data for Environmental Service Group Bias Tube Adjustment Organisation Precision factor

Chichester DC G 0.77 Castlereagh BC G 0.81 Castlereagh BC G 0.79 Lisburn CC P 0.83 North Down BC G 0.73 Wrexham CBC G 0.88 Horsham DC G 0.88 AEA Tech Intercomparison G 0.81

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Factor to Use 0.81

The results of Wrexham County Borough Council’s Co-location study are shown later in this appendix.

Discussion of Choice of Factor to Use

The national Bias Adjustment Factor (0.81) has been used to correct the diffusion tube results received during 2009. This was seen as a more representative, being a combination of a total of eight studies.

PM Monitoring Adjustment

Both the Particulate Matter (PM10) monitors operated in Wrexham County Borough are Partisol 2025’s, which are gravimetric analysers. These have been shown to meet the European equivalence test and therefore no adjustments are needed for the monitored results.

Short-term to Long-term Data adjustment

The Local Air Quality Management Technical Guidance LAQM.TG(09), requires and provides a methodology whereby monitoring sites with a low data capture percentage, can be annualised in order to provide an indication of what might be a yearly figure. This method is described in Box 3.2 of the LAQM.TG(09).

The four Nitrogen dioxide diffusion tube sites that gave low capture rates were compared to the two Automatic Monitoring sites located in Wrexham. As differing months were missing from each data set the table below shows the values used in the adjustment calculations:

Table A2 Nitrogen Dioxide Diffusion tube Annualisation data

Months Annual Mean Period Mean Ratio Missing Used to Victoria Isycoed Victoria Isycoed Site Type from Annualise Road Road Data Set Results

Ceiriog Suburban Apr, May, 21.3 8.8 23 9 1.05 School Jun, Aug, Oct Gardden Roadside Mar, Jul, 21.3 8.8 23 9 1.05 View Aug Rhostyllen Roadside May, Jun, 21.3 8.8 22 9 1.03 Rbt Oct Smithfield Roadside Jan to Apr 21.3 8.8 19 8 1.11 Road

The Particulate Matter (PM10) monitor located at Isycoed also returned a low capture rate and this was adjusted by comparison to the Victoria Road AURN PM10 monitor:

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Table A3 Annualisation data for Wrexham Isycoed PM10 Monitor

Site used Ratio Used for Type Annual Mean Period Mean to Annualise adjustment Results

Victoria Roadside 15.2 11.72 1.3 road AURN

QA/QC of automatic monitoring

State which organisation carries out the QA/QC. Frequency of calibrations etc. Any issues to be highlighted.

Delete this instruction box before submitting the report.

Start writing here…

The QA/QC of both the Automatic monitoring sites in Wrexham are undertaken by AEA Technology. This is done under the AURN contract for the Victoria Road site and under the Welsh Air Quality Forum’s (www.welshairquality.c.uk) contract for the Wrexham Isycoed site.

The Victoria Road AAURN site annual calibration and six monthly audit are arranged by AEA Technology and carried out by the contracted organisation.

The Wrexham Isycoed site is annually calibrated and six monthly audited by Casella. Additionally to this AEA Technology carries out its own annual audit.

QA/QC of diffusion tube monitoring

Provide information on tube precision and WASP results (see Chapter 3 of TG(09)).

Delete this instruction box before submitting the report.

Start writing here… The following two tables show the results of the Wrexham County Borough Co-location study and the WASP analysis for Environmental Services Group Ltd:

38 Progress Report Wrexham County Borough Council April 2010

Table A4 Results of the Wrexham County Borough Council Co-Location study during 2009

Progress Report 39 April 2010 Wrexham County Borough Council

Table A5 Complete Data Sets for Diffusion Tube monitoring undertaken by Wrexham County Borough Council during 2009

Nitrogen Dioxide NO2

NO2 CONCENTRATIONS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC µgm³

GROSVENOR ROAD 45 54 48 47 39 45 35 32 52 40 39 46 CROWN BUILDINGS 31 29 26 26 27 31 13 14 16 32 REDWITHER 28 24 20 13 16 10 13 16 19 22 32 PLAS MADOC 22 16 7 16 10 15 8 8 13 14 15 23 CEIRIOG SCHOOL 24 21 19 24 18 17 28 GARDDEN VIEW 30 27 25 17 26 25 23 24 31 HUGMORE LANE 65 27 18 30 21 14 14 26 21 20 RHOSTYLLEN 34 26 23 31 24 29 19 22 26 26 28 26 MOLD ROAD 35 32 36 27 27 24 20 29 33 33 42 CHESTER ROAD 54 34 43 31 34 29 39 42 73 42 HOLT ROAD 34 36 27 30 25 27 23 20 24 29 31 36 HOLYHEAD ROAD 30 22 19 29 22 21 16 38 21 20 24 26 SYCAMORES 52 42 38 34 36 27 27 40 37 43 RHOSTYLLEN RBT 35 34 28 35 39 32 38 31 36 BUS STATION 54 49 44 50 39 48 38 37 45 39 43 45 SMITHFIELD ROAD 25 34 19 17 26 26 27 37

Sulphur Dioxide SO2

SO2 CONCENTRATIONS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC µgm³

LLAY 1.78 0.98 1.02 2.37 0.75 1.01 1.12 1.47 0.98 1.12 1.34 BRYMBO 1.37 0.98 1.02 0.52 1.02 0.72 1.01 1.45 0.6 0.68 0.66 1.23 CHIRK 4.99 2.69 1.67 0.73 0.6 1.01 1.01 1.26 2.82 0.62 1.25 4

40 Progress Report Wrexham County Borough Council April 2010

Ozone O3

O3 CONCENTRATIONS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC µgm³

CHIRK 61.09 68.95 75.74 106.2 97.7 71.52 62.78 71.59 53.18 47.5 71.41 48.21

Benzene C6H6

C6H6 CONCENTRATIONS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC µgm³

GROSVENOR ROAD 0.7 1 1.1 0.8 0.4 0.6 0.5 0.6 0.9 0.6 1.4 LLWYNEINION ROAD 0.7 0.4 0.5 0.5 0.4 0.1 0.6 0.7 0.3 0.4 0.6

Co-Location Studies for both Nitrogen Dioxide (NO2) and Sulphur Dioxide (SO2) carried out at Victoria Road AURN station

VICTORIA ROAD CONCENTRATIONS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC µgm³

NO2 1 37 27 23 29 25 34 19 17 26 25 28 34 NO2 2 47 27 22 35 20 30 19 17 26 26 26 33 NO2 3 40 27 16 30 20 26 18 16 25 26 26 35 SO2 1 1.31 0.98 1.02 0.69 0.99 0.56 1.02 0.6 1.03 0.85 0.92 0.37

Progress Report 41 April 2010 Wrexham County Borough Council

Table A6 Results of Environmental Service Group WASP Scheme

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