County Borough Council

2015 Updating and Screening Assessment for Council

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

April 2015

LAQM USA 2015 Wrexham County Borough Council 1 Wrexham County Borough Council Executive Summary

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 are likely to be or are being breached. 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

LAQM USA 2015 Wrexham County Borough Council 2 Wrexham County Borough Council Table of contents

1 Introduction ...... 6 1.1 Description of Local Authority Area ...... 6 1.2 Purpose of Report ...... 6 1.3 Air Quality Objectives ...... 6 1.4 Summary of Previous Review and Assessments ...... 7 2 New Monitoring Data ...... 12 2.1 Summary of Monitoring Undertaken ...... 12 2.1.1 Automatic Monitoring Sites ...... 12 2.1.2 Non-Automatic Monitoring Sites ...... 15 2.2 Comparison of Monitoring Results with Air Quality Objectives ...... 21 2.2.1 Nitrogen Dioxide ...... 23

2.2.2 PM10 ...... 30 2.2.3 Sulphur Dioxide...... 37 2.2.4 Benzene ...... 41 2.2.5 Other pollutants monitored ...... 42 2.2.6 Summary of Compliance with AQS Objectives ...... 44 3 Road Traffic Sources ...... 45 3.1 Narrow Congested Streets with Residential Properties Close to the Kerb ...... 45 3.2 Busy Streets Where People May Spend 1-hour or More Close to Traffic ...... 45 3.3 Roads with a High Flow of Buses and/or HGVs...... 45 3.4 Junctions ...... 45 3.5 New Roads Constructed or Proposed Since the Last Round of Review and Assessment ...... 45 3.6 Roads with Significantly Changed Traffic Flows ...... 46 3.7 Bus and Coach Stations ...... 46 4 Other Transport Sources ...... 47 4.1 Airports ...... 47 4.2 Railways (Diesel and Steam Trains) ...... 47 4.2.1 Stationary Trains ...... 47 4.2.2 Moving Trains ...... 47 4.3 Ports (Shipping) ...... 47 5 Industrial Sources ...... 48 5.1 Industrial Installations ...... 48 5.1.1 New or Proposed Installations for which an Air Quality Assessment has been Carried Out ...... 48 5.1.2 Existing Installations where Emissions have Increased Substantially or New Relevant Exposure has been Introduced ...... 48

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5.1.3 New or Significantly Changed Installations with No Previous Air Quality Assessment ...... 48 5.2 Major Fuel (Petrol) Storage Depots ...... 48 5.3 Petrol Stations...... 48 5.4 Poultry Farms ...... 49 6 Commercial and Domestic Sources ...... 50 6.1 Biomass Combustion – Individual Installations ...... 50 6.2 Biomass Combustion – Combined Impacts ...... 50 6.3 Domestic Solid-Fuel Burning ...... 50 7 Fugitive or Uncontrolled Sources ...... 51 8 Conclusions and Proposed Actions ...... 52 8.1 Conclusions from New Monitoring Data ...... 52 8.2 Conclusions from Assessment of Sources ...... 52 8.3 Proposed Actions ...... 52 9 References ...... 53

List of Tables Table 1.1 Air Quality Objectives included in Regulations for the Purpose of LAQM in Table 1.2 Summary of Previous Rounds of Review and Assessment Table 2.1 Details of Automatic Monitoring Sites Table 2.2 Details of Non-Automatic Monitoring Sites Table 2.3 Details of Non-Automatic Monitoring Sites and Sensitive Receptors Table 2.4 Monitored Pollutants and Details

Table 2.5 Results of Automatic Monitoring for NO2: Comparison with Annual Mean Objective

Table 2.6 Results of Automatic Monitoring for NO2: Comparison with 1-hour Mean Objective

Table 2.7 Results of NO2 Diffusion Tubes 2014

Table 2.8 Results of NO2 Diffusion tubes (2010 to 2014)

Table 2.9 Results of Automatic Monitoring for PM10: Comparison with Annual Mean Objective

Table 2.10 Results of Automatic Monitoring for PM10: Comparison with 24-hour Mean Objective

Table 2.11 Results of Automatic Monitoring SO2: Comparison with Objective Table 2.12 Results of Benzene Diffusion Tube Monitoring

Table 2.13 Results of PM2.5 Automatic monitoring: Comparison with Annual Mean Objective

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List of Figures Figure 2.1 Map of Automatic Monitoring Sites Figure 2.2 Map of Benzene Non-Automatic Monitoring Site Figure 2.3 Map of Nitrogen Dioxide Non-Automatic Monitoring Site Figure 2.4 Trends in Annual Mean Nitrogen Dioxide Concentrations Measured at Automatic Monitoring Sites Figure 2.5 Trends in Annual Mean Nitrogen Dioxide Concentrations Measured at Diffusion Tube Monitoring Sites

Figure 2.6 Roundabout (WCBC-032) NO2 Monitoring Site

Figure 2.7 Trends in Annual Mean PM10 Concentration at Victoria Road

Figure 2.8 Trends in Annual Mean PM10 Concentration at Isycoed

Figure 2.9 Trends in SO2 Concentrations Figure 2.10 Trends in Annual Mean Benzene Concentrations

Figure 2.11 Trends in Annual Mean PM2.5 Concentrations at Victoria Road

Appendices Appendix A QA/QC Data NO2 Diffusion Tube Laboratory Details & Bias Adjustment Factor Factor from Local Co-location Studies Table A1 Factor from Local Co-location Studies Table A2 Organisations who have submitted BAF Data for Environmental Scientifics Group Discussion of Choice of Factor to Use Table A3 Complete Data sets for Nitrogen Dioxide and Benzene Diffusion Tube monitoring undertaken by WCBC during 2014 QA/QC of diffusion tube monitoring Table A4 Distance calculation at Rhostyllen Roundabout.

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1 Introduction 1.1 Description of Local Authority Area

Wrexham County Borough is situated in North East 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 Cheshire West and Chester Council, and Shropshire County Council. Wrexham County Borough’s total population (as at 2010) is estimated to be 133,559. 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 over 200 businesses.

Wrexham County Borough Council has not needed to declare any Air Quality Management Areas to date. 1.2 Purpose of Report

This report fulfils the requirements of the Local Air Quality Management process as set out in Part IV of the Environment Act (1995), the Air Quality Strategy for England, Scotland, Wales and Northern Ireland 2007 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 exceedences are considered likely, the local authority must then 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.

The objective of this Updating and Screening Assessment is to identify any matters that have changed which may lead to risk of an air quality objective being exceeded. A checklist approach and screening tools are used to identify significant new sources or changes and whether there is a need for a Detailed Assessment. The USA report should provide an update of any outstanding information requested previously in Review and Assessment reports.

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), The 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 LAQM in Wales Air Quality Objective Date to be Pollutant Concentration Measured as achieved by Running annual 16.25 µg/m3 31.12.2003 mean Benzene Running annual 5.00 µg/m3 31.12.2010 mean Running annual 1,3-Butadiene 2.25 µg/m3 31.12.2003 mean Running 8-hour Carbon monoxide 10.0 mg/m3 31.12.2003 mean 0.5 µg/m3 Annual mean 31.12.2004 Lead 0.25 µg/m3 Annual mean 31.12.2008 200 µg/m3 not to be exceeded more than 1-hour mean 31.12.2005 Nitrogen dioxide 18 times a year 40 µg/m3 Annual mean 31.12.2005 50 µg/m3, not to be 31.12.2004 Particles (PM10) exceeded more than 24-hour mean (gravimetric) 35 times a year 40 µg/m3 Annual mean 31.12.2004 350 µg/m3, not to be exceeded more than 1-hour mean 31.12.2004 24 times a year 125 µg/m3, not to be Sulphur dioxide exceeded more than 24-hour mean 31.12.2004 3 times a year 266 µg/m3, not to be exceeded more than 15-minute mean 31.12.2005 35 times a year

1.4 Summary of Previous Review and Assessments

The table below is a summary of Wrexham County Borough Councils previous rounds of Air Quality assessment along with whether a detailed assessment was required. The text following the table provides further details of the reports prepared by the Council.

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Table 1.2 – Summary of Previous Rounds of Review and Assessment

Report Year Produced Conclusions

First stage 1999 Proceed to a Stage 2 assessment for NO2 and PM10 Second Stage 2000 Proceed to a Stage 3 assessment for SO2 and PM10 Third Stage 2001 Elevated particulate levels were likely in a coal burning village (). Implement an AQMA plan 2002 Air quality plan devised and completed for Llay bringing the levels of PM10 within standards Updating and 2003 Air quality objectives have been met. Screening Assessment and Addendum Progress report 2004 Air quality objectives have been met. Progress report 2005 Air quality objectives have been met. Updating and 2006 Air quality objectives have been met. Screening Assessment Progress report 2007 Air quality objectives have been met. Progress report 2008 Air quality objectives have been met. Updating and 2009 Air quality objectives have been met. Screening Assessment Progress report 2010 Air quality objectives have been met. Progress report 2011 Air quality objectives have been met. Updating and 2012 Air quality objectives have been met. Screening Assessment Progress report 2013 Air quality objectives have been met. Progress report 2014 Air quality objectives have been met.

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.

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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, but that the Sulphur Dioxide level would not be breached. 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, as it was completed prior to the objective date.

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:

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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.

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 Updating and Screening Assessment completed in 2009 which reviewed the County Borough as a whole paying particular attention any new developments that could impact on Air Quality. There were no new or existing areas that were identified as having a detrimental impact on the Air Quality of the County Borough

The Progress Report completed in 2010 also concluded that there has not been a change in local circumstances, which may indicate a possible exceedence. The report also stated that a review of the diffusion tube network would be undertaken.

The Progress Report completed in 2011 again concluded that there had not been a change in local circumstances, which may indicate a possible exceedence. The report also provided details of the diffusion tube network review and confirmed that a monitoring program around the new Morrison’s superstore had started.

The Updating and Screening Assessment completed in 2012 Wrexham County Borough Council reviewed the Air Quality in the County Borough as whole and

LAQM USA 2015 Wrexham County Borough Council 10 Wrexham County Borough Council determined that there were no developments since the last USA that would have a detrimental impact on Air Quality.

The Progress Report completed in 2013 concluded that there had been not been a change in local circumstances, which may indicate a possible exceedence. The report also confirmed that the PM2.5 monitoring was recording levels at less than half the target value.

The last Air Quality report completed by Wrexham County Borough Council was the Progress Report completed in 2014 which concluded that:

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 County 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 Council’s website http://www.wrexham.gov.uk/english/environment/air_quality/index.htm

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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 County Borough during 2014, details of which are shown on the below chart (Figure 2.1) and table (Table 2.1).

The Victoria Road station has been operating since March 2003, with PM2.5 monitoring starting in December 2009. It 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 Ricardo-AEA and Bureau Veritas, the environmental consultants contracted by DEFRA and the Welsh Government (WG) to provide this service. These two companies are also responsible for arranging the annual site audit and service visits. Both the PM10 and PM2.5 monitors are Partisol daily gravimetric analyser and therefore the data is not subject to any corrections. WCBC maintains an NO2 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 table indicates that it is 20 metres way from the school, it can be taken that the same levels of Nitrogen Dioxide, Sulphur Dioxide and Particulate Matter (10 & 2.5µm) 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 metres 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 the site audit and data QA/QC is undertaken by Ricardo-AEA as part of their contract with the WAQF. The station was serviced by Air Monitors in 2014. 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.

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Figure 2.1 Map of Automatic Monitoring Sites

Reproduced from the Ordinance Survey mapping with the permission of the Controller of Her Majesty’s Stationary Office Crown Copyright. Unathorised reproduction infringens Crown copyright and may lead to prosecution or civil proceedings. Wrexham County Borough Council Licence No 100023425

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Table 2.1 Details of Automatic Monitoring Sites Relevant Exposure? (Y/N with Distance to distance kerb of (m) to nearest road Does this location X OS Grid Y OS Grid Pollutants Monitoring relevant (N/A if not represent worst- Site Name Site Type Ref Ref Monitored In AQMA? Technique exposure) applicable) case exposure?

Victoria Roadside 349900 332900 NOx, SO2 No Continuous Y (20m) 4m Y (20m) Road AURN Daily Victoria Roadside 349900 332900 PM10, PM2.5 No Y (20m) 4m Y (20m) Road AURN Gravimetric

Wrexham Urban 350260 340355 NOx, SO2 No Continuous Y (30m) 55m Y (30m) Isycoed WI Industrial Daily Wrexham Urban 350260 340355 PM10, No Y (30m) 55m Y (30m) Isycoed WI Industrial Gravimetric

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) PM2.5 = Particulate matter with a diameter of 2.5 µm.

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2.1.2 Non-Automatic Monitoring Sites

Wrexham County Borough Council maintains a diffusion tube network of 25 tubes for monitoring Nitrogen Dioxide and Benzene Figures 2.2 and 2.3 and Table 2.2 identify the locations of these sites:

LAQM USA 2015 Wrexham County Borough Council 15 Wrexham County Borough Council Figure 2.2 Map of Benzene Non-Automatic Monitoring Site

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

3 8 Ordnance Survey digital mapping with 4 A the permission of the Controller of her Llay Majesty's Stationery Office. Crown A541 Copyright Reserved. Wrexham County To Nantwich Holt A Borough Council Licence No. LA09021L 5 To Ruthin 1 34 56 A5 A52 Wrexham 5 Wrexham Road Industrial Est. Rhostyllen A483 Bangor-is-y-coed

8 2 9 5 A53 A A 5 25 To Llangollen Overton A 5 9 53 A5 2 A 8 Hanmer 95 A4 Pentre A5 LLanarmon To Oswestry DC

Reproduced from the Ordinance Survey mapping with the permission of the Controller of Her Majesty’s Stationary Office Crown Copyright. Unathorised reproduction infringens Crown copyright and may lead to prosecution or civil proceedings. Wrexham County Borough Council Licence No 100023425

LAQM Progress Report 2013 Wrexham County Borough Council 16 Wrexham County Borough Council Figure 2.3 Map of Nitrogen Dioxide Non-Automatic Monitoring Sites:

To Chester

Nitrogen Dioxide diffusion tubes Gwersyllt MonitoringDevelopment locations Services Directorate Rossett Wrexham County Borough To Mold Coedpoeth The Sycamores 3 8 Rossett Ordnance Survey digital mapping with 4 A Marford the permission of the Controller of her Llay Rhostyllen Roundabout (A483) Llan-y-Pwll Majesty'sOld Farm Stationery Road Office. Crown A541 Gresford Copyright Reserved. Wrexham County Gwersyllt To Nantwich Holt Holt Road A Borough Council Licence No. LA09021L Brymbo 5 Chester Road To Ruthin 1 34 56 A5 Mold Road Minera Coedpoeth Grosvenor Road Victoria Road A5 Wrexham 25 Wrexham King Street Smithfield Road Gardden View Industrial Est. Ruthin Road Rhostyllen Marchwiel Pentre Bach A483 Marchwiel Rhosllanerchrugog Bangor-is-y-coed

8 2 Ruabon 5 A539 A A 5 25 To Llangollen Froncysyllte Overton A 5 Penley 9 A 53 5 2 A 8 Hanmer Glyn Ceiriog Chirk 95 A4 Ceiriog Bettisfield Pentre School A5

LLanarmon To Oswestry Overto DC

Reproduced from the Ordinance Survey mapping with the permission of the Controller of Her Majesty’s Stationary Office Crown Copyright. orised reproduction infringens Crown copyright and may lead to prosecution or civil proceedings. Wrexham County Borough Council Licence No 10

LAQM Progress Report 2013 Wrexham County Borough Council 17 Wrexham County Borough Council Table 2.2 Details of Non-Automatic Monitoring Sites Relevant Is Exposure? Distance Does this Monitoring (Y/N with to Kerb of Location Co-located distance Site X OS Grid Y OS Grid Pollutants In Nearest Represent Site Name Site Type with a (m) from ID Reference Reference Monitored AQMA? Road (m) Worst- Continuous monitoring (N/A if not Case Analyser site to applicable) Exposure? (Y/N) relevant exposure)

WBC- Grosvenor Rd, Roadside 350600 333200 NO n/a N N 5m Y Wrexham 2 001 WBC- Ceiriog School, 338300 Suburban 329300 NO n/a N Y (25) 2m Y 010 Chirk 2 WBC- Gardden View, 344600 Roadside 330300 NO n/a N Y (15) 7m Y 015 Ruabon 2 WBC- Old Farm Rd, 349000 Roadside 332000 NO n/a N Y (40) 2m Y 018 Rhostyllen 2 WBC- Mold Rd, 351000 Roadside 332600 NO n/a N Y (30) 7m Y 019 Wrexham 2 WBC- Chester Rd, 352900 Intermediate 333700 NO n/a N Y (16) 3m Y 020 Wrexham 2 WBC- Holt Rd, 350700 Roadside 334100 NO n/a N Y (30) 2m Y 021 Wrexham 2 WBC- Holyhead Rd, 338700 Intermediate 328900 NO n/a N Y (55) (30) 30m Y 022 Chirk 2 Rhostyllen Roundabout, WBC- 348170 Roadside 330950 NO n/a N Y (35) 4m Y 030 Wrexham 2 (A483)

WBC- Bus Station, 350590 Roadside 333350 NO n/a N Y (35) (3) 2m Y 031 Wrexham 2

LAQM Progress Report 2013 Wrexham County Borough Council 18 Wrexham County Borough Council Relevant Is Exposure? Distance Does this Monitoring (Y/N with to Kerb of Location Co-located distance Site X OS Grid Y OS Grid Pollutants In Nearest Represent Site Name Site Type with a (m) from ID Reference Reference Monitored AQMA? Road (m) Worst- Continuous monitoring (N/A if not Case Analyser site to applicable) Exposure? (Y/N) relevant exposure) The Sycamores, WBC- 353222 Chester Road Roadside 333887 NO2 n/a N Y (25) n/a Y 032 WBC- 333981 Smithfield Road Roadside 350171 NO n/a N Y (4) 1m Y 033 2 WBC- 329017 Coed Poeth Roadside 351002 NO n/a N Y (8) 9m Y 034 2 WBC- 332097 Gwersyllt Roadside 352665 NO n/a N Y (17) 4m Y 035 2 WBC- 327630 Acrefair Roadside 342990 NO n/a N Y (2) 2m Y 036 2 WBC- 336635 Rossett Roadside 357211 NO n/a N Y(7) 3m Y 037 2 WBC- Ruthin Rd Roadside 332865 349973 NO n/a N Y (5) 2m Y 038 2 WBC- Pentre Bach Roadside 331765 350132 NO n/a N Y (20) (2) 2m Y 039 2 WBC- Overton Roadside 337449 341702 NO n/a N Y (14) 4m Y 040 2 WBC- Marchwiel Roadside 335407 347890 NO n/a N Y (28) (3) 8 m Y 041 2 WBC- Llan-Y-Pwll Roadside 352178 335359 NO2 n/a N Y (9) 5m Y 042 Victoria Road AURN AURN Roadside 349900 332900 NO2 n/a Y Y (20) (7) 5m Y

LAQM Progress Report 2013 Wrexham County Borough Council 19 Wrexham County Borough Council Relevant Is Exposure? Distance Does this Monitoring (Y/N with to Kerb of Location Co-located distance Site X OS Grid Y OS Grid Pollutants In Nearest Represent Site Name Site Type with a (m) from ID Reference Reference Monitored AQMA? Road (m) Worst- Continuous monitoring (N/A if not Case Analyser site to applicable) Exposure? (Y/N) relevant exposure)

WBC- Llwyneinion Rd Urban 347400 328700 C6H6 n/a N/A N n/a n/a 026 Rhosllanerchrugog Background

Pollutants key: NO2 = Nitrogen Dioxide C6H6 = Benzene

Where two sets of brackets are shown the first (higher) number is the actual distance of the diffusion tube to the receptor. The second (lower) value is the equivalent distance assuming the tube was on the same side of the road or directly in front of the receptor. Diffusion tubes located on the opposite site of the road are done so for siting purposes as it is not possible to site the tube any closer.

The diffusion tubes used by Wrexham County Borough Council are supplied by Environmental Services Group (ESG) who uses the 50:50 Triethanolamine to Acetone 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 2014 where they achieved a score of 100% in each of the 2014 study rounds (source http://laqm.defra.gov.uk/diffusion-tubes/qa-qc-framework.html).

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.

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This website has given a Bias Adjustment Factor (BAF) of 0.81 as an average for the thirty submitted co-location studies for 2014. It is this value that has been applied to the Nitrogen Dioxide diffusion tube results that Wrexham County Borough Council used in 2014.

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

Table 2.3 gives details of the non-automatic monitoring sites and sensitive receptors

Table 2.3 Details of Non- Automatic Monitoring Sites and Sensitive Receptors Relevant Exposure? Site ID Pollutants (Y/N with Comments Site Name Site Type Monitored distance (m) to relevant exposure)

A busy road during the rush hours though contains no sensitive receptors. Monitoring undertaken for Grosvenor Rd, WBC-001 Roadside NO N comparative purposes and in the event of a planning Wrexham 2 application for a sensitive receptor. The closest sensitive receptor is 75 metres away. The diffusion tube is located on a roadside near the Ceiriog School, WBC-010 Suburban NO Y (20) school, though it is actually at the boundary of a Chirk 2 domestic residence. Gardden View, The diffusion tube is located on the side of the main WBC-015 Roadside NO Y (15) Ruabon 2 road approaching the village. Old Farm Rd, The diffusion tube is located on the side of the main WBC-018 Roadside NO Y (40) Rhostyllen 2 road through the village. The diffusion tube is located at the boundary of the car Mold Rd, WBC-019 Roadside NO Y (30) park for the university. This is one of the main access Wrexham 2 roads into the town of Wrexham. Chester Rd, The diffusion tube is located on the side of a main route WBC-020 Intermediate NO Y (16) Wrexham 2 from the A483 into Wrexham town. The nearest receptor is 30 metres away from the tube Holt Rd, on the opposite side of the road but is the same WBC-021 Roadside NO Y (30) Wrexham 2 distance from the roadside as the tube is and is therefore exposed to equivalent levels The nearest receptor is 55 metres away from the tube on the opposite side of the road. Though is Holyhead Rd, WBC-022 Intermediate NO Y (55) (30) approximately the same distance back from the road as Chirk 2 the diffusion tube approximately 20 metres from the roadside. Rhostyllen Diffusion tube is on the opposite side of the road some Roundabout, 35 metres away from nearest receptor. Though the WBC-030 Roadside NO Y (35) (7.5) 2 tube is an equivalent distance back from the roadside Wrexham (A483) as the property on the other side of the road. Bus Station, Diffusion tube is located at the bus station in Wrexham WBC-031 Roadside NO Y (5) Wrexham 2 town. Located nearby the first floor flat above a shop. The diffusion tube is located within the garden area of a block of flats that is next to a filter lane for the A483. The Sycamores, The tube is located on the filter lane side of the WBC-032 Roadside NO Y (25) Chester Road 2 property and is a useful comparator to the Chester Road diffusion tube (WBC-020) which is 320 metres away.

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Wrexham County Borough Council

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

The diffusion tube is located at the garden boundary of WBC-033 Smithfield Road Roadside NO2 Y (4) a property near the entrance / exit to the car park at the Eagles Meadow Arcade. The diffusion tube is located by the main road through WBC-034 Coed Poeth Roadside NO Y (8) 2 the village. The diffusion tube is located by one of the main rush WBC-035 Gwersyllt Roadside NO Y (17) 2 hour routes through Wrexham. The diffusion tube is located at the garden boundary of WBC-036 Acrefair Roadside NO Y (2) 2 a property near the main road through the village. The diffusion tube is located by the main road through WBC-037 Rossett Roadside NO Y(7) 2 the village. The diffusion tube is located on a busy rush hour road. Though it is located on the opposite side of the road to the nearest property it is an equivalent distance from WBC-038 Ruthin Rd Roadside NO Y(15)(1) 2 the kerbside. It is also approximately 65 metre to the North of the AURN station and so provides a useful comparator to this site. The diffusion tube is located at the garden boundary of a block of flats just off Ruthin Road at the opposite end WBC-039 Pentre Bach Roadside NO2 Y(6) to tube WBC-038). This area is also marked for future development (Western Gateway) which may bring increased traffic through the residential area. The diffusion tube is located on the main road through WBC-040 Overton Roadsid