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					                           REPORT A




             DARLINGTON BOROUGH COUNCIL




REVIEW AND ASSESSMENT OF AIR QUALITY 2006




       UPDATING and SCREENING REPORT




         PUBLISHED BY DARLINGTON BOROUGH COUNCIL – APRIL 2006
CONTENTS


             SUMMARY                                                                                 Pages 3 - 4
             Structure of Report                                                                     Page 5
1.           Introduction to Local Air Quality Management                                            Page 6
                                       Pollutant objectives

                                       Future Pollutants

                                       Target Groups                                                 Page 7

2.           Darlington Borough Council Background                                                   Page 8
                                       Darlington Area

                                       Tees Valley Environmental Protection Group

                                       Darlington Review and Assessments 2000 - 2005                 Page 9
                                       2005 Traffic Pollution Study

                                       Pollutant Monitoring Update                                   Page 10
                                       Monitoring Data Ratification and Validation

3.           Emissions Overview and Changes since 2003                                               Pages 11 - 12

4.           Pollutant Updating and Screening Process                                                Page 13

5.           Nitrogen Dioxide                                                                        Pages 14 - 18

6.           Particulate PM10                                                                        Pages 19 - 23

7.           Sulphur Dioxide                                                                         Pages 24 - 26

8.           Carbon Monoxide                                                                         Pages 27 - 28

9.           Benzene                                                                                 Pages 29 - 30

10.          1,3-Butadiene                                                                           Pages 31 - 32

11.          Lead                                                                                    Pages 33 - 34

12.          Conclusion                                                                              Page 35

13.          Further Work                                                                            Page 35

14.          Consultation                                                                            Page 35


Appendices
             Appendix 1         Background Concentrations     1a - NOx, NO2                          Pages 36 - 38
                                                              1b – PM10                              Pages 39 - 41
                                                              1c – SO2, CO, Benzene, 1,3-butadiene   Pages 42 - 44

             Appendix 2         Traffic Flow Projections                                             Page 45

             Appendix 3         Small Industrial Processes - Part B                                  Page 46

             Appendix 4         Large Industrial Processes - Part A                                  Page 47

References / Contact                                                                                 Pages 48 - 49
                                            DARLINGTON BOROUGH COUNCIL



Review and Assessment of Air Quality 2006


SUMMARY of Updating and Screening Report


This report is the third in the series of Air Quality Review and Assessments carried out in the Darlington Borough
Council area under the Environment Act 1995.


The first Review and Assessment of Air Quality 2000, was submitted to Government in December 2000, and was
based on a comprehensive review of pollutant emission and monitoring data between 1996 and 1999. The report
concluded that air quality in the Darlington Council area, judged against Government objectives, was generally good,
and there was no need to declare any Air Quality Management Areas.


The second Review and Assessment of Air Quality, an Updating and Screening report, was submitted to Government
in May 2003, and recorded significant emission data changes to the end of 2001 / 2002, updated monitoring data to
end 2002, and identified any areas of concern where further, more detailed, analysis was required. The report
concluded that air quality in the Darlington Council area would meet Government objectives by the due date, and
there was no need to declare any Air Quality Management Areas.


For 2004 and 2005, Progress reports were submitted to Government, updating monitoring data and trends, and
recording significant developments and changes to pollutant emissions.


All reports submitted have been accepted in full by Defra.


This third Review and Assessment is an Updating and Screening process, recording significant emission data
changes to the end of 2004 / 5, updating monitoring data to end 2005, and identifying any areas of concern where
further, more detailed, analysis is required.


Government objectives for air quality currently cover seven pollutants:


     •    Nitrogen dioxide
     •    Particulate PM10
     •    Sulphur dioxide
     •    Carbon monoxide
     •    Benzene
     •    1,3-butadiene
     •    Lead


The main sources of these pollutants are domestic / commercial heating emissions, road traffic fuel and exhaust
emissions, and industrial combustion and process emissions.


Within the Darlington Council area, domestic / commercial heating is largely fuelled by natural gas, which gives low
levels of emissions compared with other carbon based fuels. There are few large industrial processes within the
Council area, and there is no significant impact from industrial sources outside of the Council area. This is no change
from earlier Review and Assessments. Road traffic fuel and exhaust emissions remain the largest source of air
pollution at ground level.


While, in general, improved fuels, engines and exhaust systems are having an impact on reducing road traffic
emissions, traffic volume increases and the low point of discharge is still giving rise to high kerbside concentrations of
nitrogen dioxide and particulate PM10. The Darlington Council area does not have very heavily congested roads, and
there are no ‘canyon’ effect locations, with most buildings generally at low level and set back from the roadside.



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                                            DARLINGTON BOROUGH COUNCIL


Traffic in the town centre is also restricted, with an inner ring road helping the flow of local through traffic, and giving
access to town centre car parks. The north – south A1 motorway passes well to the west of the town, and there is a
southern by-pass for east – west A66 traffic, both through rural areas. A planned eastern transport corridor, providing
access to new development land, will ease traffic flows on two of the busiest road corridors (Haughton Road and
Yarm Road).


In 2004, Darlington was one of three towns selected by the Department of Transport to participate in a national
sustainable travel project (‘Town on the move’), looking at ways to tackle traffic congestion. The project provides
better quality road traffic data, and this shows that earlier projections to 2010 continue to be a fair representation.
Funding has also been received to promote cycling and develop new cycle routes, and to increase the level of
pedestrian only areas in the town centre.


Continuous monitoring carried out within the Darlington Council area, as previously, shows that there is unlikely to be
any exceedance of government objectives, even at the most heavily congested traffic location where there are no
target group members of the public present. Continuous monitoring carried out elsewhere in the Tees Valley area, at
locations where traffic flows and vehicle composition are similar to that within the Darlington area, provides further
support (report B attached).


In 2005, a comprehensive traffic pollution study (report C attached) was carried out across the Tees Valley using the
new Highways Agency model. Within Darlington the study looked at the continuous monitoring sites, diffusion tube
sites, and building façades close to busy roads. The study showed that the model provided a good representation of
traffic pollution, and confirmed that there were no exceedances of Government objectives.


It is concluded that all Government objectives will be met by the due date within the Darlington Council area, and
there is no need to declare any Air Quality Management areas.


The proposed particulate PM10 objectives for 2010 are, however, less certain to be met without significant reductions
in particulate emissions.


The next Updating and Screening report is due in 2009, with Progress reports in 2007 and 2008. The need for further
work will depend on the planned Government review of UK Air Quality Strategy, which has been delayed from Autumn
2005.




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                                     DARLINGTON BOROUGH COUNCIL


                               Darlington Updating and Screening Report 2006


Structure of Report


      Main Report (report A)

      General Introduction

      Analysis of Darlington Air Pollution Emissions & Changes from 2003

                Residential, Commercial, Industrial, Roads

      Summary of Air Quality Monitoring

                Extracted from the Annual Air Quality Monitoring Report for the Tees Valley (report B below)

      Analysis by the Seven Regulated Air Pollutants

                Nitrogen Dioxide, Particulate PM10, Sulphur Dioxide, Carbon Monoxide, Benzene, 1,3-
                Butadiene, Lead

      Appendices

                Updated (2004) Background Air Quality Data for NO2 / Particulate PM10,
                Original (2001) Background Data for Sulphur Dioxide, Carbon Monoxide, Benzene, and 1,3-
                Butadiene
                Road Traffic Flows, Part B and A2 Industrial Processes, Part A Industrial Processes




      Annual Air Quality Monitoring Report for the Tees Valley (report B)

                Records all air quality monitoring carried out in Darlington and the other four Tees Valley
                Councils 2002 – 2005.
                Relevant data is used in the main report A above.




      Traffic Pollution Study in the Tees Valley 2004 (report C)

                A Tees Valley Survey (published July 2005) of Key Road Areas Using the Updated DMRB
                Road Model.
                The Survey:
                -   verifies the DMRB model at roadside continuous monitoring stations for NO2 and PM10,
                -   investigates the accuracy of NO2 diffusion tube results
                -   uses the model to determine NO2 and PM10 levels at sensitive roadside locations where
                    target members of the public may be present
                Relevant data is used in the main report A above.




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                                             DARLINGTON BOROUGH COUNCIL


1. INTRODUCTION TO LOCAL AIR QUALITY MANAGEMENT


LAQM                The Environment Act 1995, and subsequent regulations, has required local authorities to review
                    and assess air quality in their area from time to time, against a range of air quality objectives. If
                    the review and assessment process shows that an objective is unlikely to be met by the due
                    date, local authorities are obliged to declare an Air Quality Management Area (AQMA), and
                    prepare an action plan to reduce air pollution within the defined area. This process of review and
                    assessment and subsequent action is Local Air Quality Management (LAQM).


                    LAQM covers seven air pollutants as shown below, but further air pollutants will be added in the
                    future.


                    Review and assessment will be carried out to a three year timetable. The first, and most detailed
                    review and assessment was required for December 2000.                            Subsequent reviews and
                    assessments are in a more simplified form as an updating and screening report for end April
                    2003, 2006 and 2009. Progress Reports will be required for the intervening years 2004, 2005,
                    2007 and 2008.



Pollutant           Pollutant             Objective                                                               Due Date
Objectives          Nitrogen Dioxide      40 µg/m³ as an annual mean, with no exceedances                         31.12.2005
                                          200 µg/m³ as a 1-hour mean, with up to 18 exceedances                   31.12.2005


                    Particulate PM10      40 µg/m³ (g) as an annual mean, with no exceedances                     31.12.2004
                    (gravimetric)         50 µg/m³ (g) as a 24-hour mean, with up to 35 exceedances               31.12.2004


                                two further particulate PM10 objectives are proposed (but not yet regulated) for 2010:


                                          20 µg/m³ (g)as an annual mean, with no exceedances                      31.12.2010
                                          50 µg/m³ (g) as a 24-hour mean, with up to 7 exceedances                31.12.2010


                    Sulphur Dioxide       125 µg/m³ as a 24-hour mean, with up to three exceedances               31.12 2004
                                          350 µg/m³ as a 1-hour mean, with up to 24 exceedances                   31.12.2004
                                          266 µg/m³ as a 15-minute mean, with up to 35 exceedances                31.12.2005


                    Carbon Monoxide 10.0 mg/m³ as an 8-hour running mean, with no exceedances                     31.12.2003


                    Benzene               16.25 µg/m³ as a running annual mean, with no exceedances               31.12.2003
                                          5.00 µg/m³ as an annual mean, with no exceedances                       31.12.2010


                    1,3-Butadiene         2.25 µg/m³ as a running annual mean, with no exceedances                31.12.2003


                    Lead                  0.5 µg/m³ as an annual mean, with no exceedances                        31.12.2004
                                          0.25 µg/m³ as an annual mean, with no exceedances                       31.12.2008


Future Pollutants   Pollutants under consideration within the EU and UK are Ozone, Cadmium, Arsenic, Nickel,
                    Mercury, and Polycyclic Aromatic Hydrocarbons (PAHs). These are not yet regulated, and are
                    not part of this 2006 Review and Assessment.




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                                     DARLINGTON BOROUGH COUNCIL


Target Groups   The air quality objectives only apply to areas where target group members of the public are likely
                to be present. The definition of these depends on the averaging period of the objective, with a
                short 15 minute averaging period affecting a wider range of the public than an annual average.


                Government guidance is as follows:
                Averaging Period          Objectives should apply at:                     Objectives     should       generally   not
                                                                                          apply at:
                Annual Mean               All locations where members of the              Building facades of offices or other
                                          public might be regularly exposed.              places of work where members of
                                          Building     facades     of      residential    the public do not have regular
                                          properties, schools, hospitals, libraries       access.
                                          etc.                                            Gardens of residential properties
                                                                                          Kerbside      sites   (as    opposed     to
                                                                                          locations at the building façade), or
                                                                                          any other location is expected to be
                                                                                          short term.




                24-hour mean and 8-hour   All locations where the annual mean             Kerbside      sites   (as    opposed     to
                mean                      objective would apply.                          locations at the building façade), or
                                          Gardens of residential properties, in           any other location is expected to be
                                          particular   around    seating     or    play   short term.
                                          areas.


                1-hour mean               All locations where the annual mean             Kerbside sites where the public
                                          and      24-hour   and    8-hour        mean    would not be expected to have
                                          objectives would apply.                         regular access.
                                          Kerbside sites (e.g. pavements of busy
                                          shopping streets).
                                          Those parts of car parks, bus stations
                                          and railway stations etc., which are not
                                          fully enclosed, where the public might
                                          reasonably be expected to spend 1
                                          hour or more.
                                          Any outdoor locations to which the
                                          public might reasonably be expected
                                          to spend 1 hour or longer.


                15-minute mean            All locations where members of the
                                          public might reasonably be exposed
                                          for a period of 15 minutes or longer.




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                                           DARLINGTON BOROUGH COUNCIL


2. DARLINGTON BOROUGH COUNCIL BACKGROUND


Darlington Council   Darlington Borough Council is one of five unitary Councils forming the general area known as the
area                 Tees Valley. As shown below, it is the most westerly of these Councils, and third largest in area,
                     at 198.4 sq. km.




                     Darlington Borough has a densely populated central area, but is otherwise largely rural. It is a
                     major shopping and commercial centre, and is the main railway centre for the Tees Valley.
                     There is very little heavy industry compared with other Tees Valley Councils, and although some
                     quarrying and other industrial processes lie just outside its boundary, they do not significantly
                     impact on Darlington air quality.


                     The main A1 motorway (North – South), and the A66 trunk route (East – West) run through the
                     Borough, but are mainly in rural areas.      Within the urban area, there are some congested
                     commuter routes, and in the absence of a northern by-pass, some heavy through traffic on the
                     northern outskirts of the town.


                     The majority of the Darlington area is subject to Smoke Control Orders, and natural gas is the
                     main source of heating in all but a few rural villages. This means that air pollution from domestic
                     and commercial sources are low. Industrial emissions are also low, leaving road transport as the
                     most significant air pollution source.


Tees Valley          The Tees Valley Environmental Protection Group (TVEPG) is a joint committee of the five Tees
Environmental        Valley Councils, which looks at a range of environmental issues of mutual concern. Air pollution
Protection Group
                     matters are an important part of the work of the Group, drawing together a better understanding
                     of the sources of pollutants, and their impact across the Tees Valley.


                     There is a wide range of air pollution monitoring carried out between the five Councils. This data
                     is collated and published annually (reference 1), and forms a key part of review and assessment
                     for each of the Councils.




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                                          DARLINGTON BOROUGH COUNCIL


Tees Valley         Of the five Councils, Darlington is unique in not having large industrial areas, or being close to
Environmental       the industrial areas nearer the coast. Air quality in Darlington is therefore a good measure of
Protection Group
                    emissions from domestic, commercial and road traffic sources.
(continued)




Darlington 2000     Stage 1 of the first Review and Assessment was a joint report published by the TVEPG in
Review and          December 1998. A more detailed 2nd / 3rd stage Review and Assessment, which included work
Assessment
                    from consultants commissioned to undertake advanced air quality modelling (AAQuIRE 2000),
                    was published by Darlington Council in December 2000. This confirmed that road traffic was the
                    main source of air pollution at ground level in the form of nitrogen dioxide and particulate PM10,
                    but that there was no need to declare any Air Quality Management Areas.
                    The report was accepted in full by the Department for Environment, Food and Rural Affairs
                    (DEFRA).


2003 Updating and   Darlington Borough Council published this report in May 2003. There was no significant change
Screening Report    to domestic, commercial or industrial sources within, or close to the Darlington Council area.
                    Road traffic flows were updated and compared with the 2000 Review and Assessment, with no
                    areas identified of particular concern.
                    The report was accepted in full by the Department for Environment, Food and Rural Affairs
                    (DEFRA).


2004 Progress       This report was a joint report published by the TVEPG in April 2004.         The report updated
Report              monitoring results across the Tees Valley, showed pollution trends, and recorded any significant
                    developments that may affect air quality.
                    The report was accepted in full by the Department for Environment, Food and Rural Affairs
                    (DEFRA).


2005 Progress       This report was a joint report published by the TVEPG in April 2005.         The report updated
Report              monitoring results across the Tees Valley, showed pollution trends, and recorded any significant
                    developments that may affect air quality.
                    The report was accepted in full by the Department for Environment, Food and Rural Affairs
                    (DEFRA).


2005 Traffic        This study was a joint report published by the TVEPG in July 2005. The report tested the new
Pollution Study     DMRB roadside air quality model against roadside continuous monitors for NO2 and PM10;
                    against NO2 diffusion tubes for NO2 and to determine associated PM10 levels, and to check
                    building façade locations nearest to busy roads.
                    The study concluded that the model shows good agreement against the continuous monitors,
                    and provides a useful method for looking at traffic related issues.
                    The study is attached as report C, with the main Darlington section on pages 5 – 11.


                    The report was accepted in full by the Department for Environment, Food and Rural Affairs
                    (DEFRA).




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                                          DARLINGTON BOROUGH COUNCIL


Pollutant           A continuous monitor for nitrogen dioxide and particulate PM10 was located kerbside near the
Monitoring Update   town centre (St Cuthbert’s Way) from 2001 to April 2004. This monitor was relocated to a
                    roadside location at Cockerton Bridge from May 2004.           In October 2005, a new kerbside
                    monitoring station for nitrogen dioxide and particulate PM10 was installed at the old location in St
                    Cuthbert’s Way.


                    The Council has an extensive diffusion tube monitoring programme for nitrogen dioxide, currently
                    at 10 locations, four of which have been part of the National diffusion tube survey. The diffusion
                    tubes are generally located at potential hot-spot kerbside sites, but two are background sites.
                    Starting January 2005, a further 3 diffusion tubes have been installed at the Cockerton Bridge
                    continuous monitor for a co-location study.


Monitoring Data     The Darlington fixed continuous monitoring stations (NOx, PM10) are modern installations,
Ratification and    operated under a comprehensive service contract with the supplier, in both cases Casella.
Validation
                    Operators of the site have received supplier training.
                    The Council is committed to achieving accuracy, precision, data capture, traceability and long
                    term consistency to ensure that data is representative of ambient air quality. In common with
                    other Tees Valley Councils, Darlington has a documented quality assurance and control
                    programme, which includes an established schedule of regular site calibrations, validation of
                    data, and documentation of all procedures. Details are summarised as follows:


                    Calibration       daily ‘automatic’ calibration with frequent (usually fortnightly) manual checks.
                                      Calibration gas obtained from approved gas standard suppliers.
                    Equipment         comprehensive service agreement with the supplier.
                    Data capture      site operators are experienced and trained personnel, monitoring data capture
                                      on a daily basis where possible to ensure that faults are detected and
                                      corrected quickly.
                    Data Processing Appropriate zero and span calibration factors are applied automatically on-site,
                                      with regular manual checks.
                    Ratification      data is screened, where possible on a daily basis, to check for unusual
                                      measurements. Suspicious data is investigated fully, and if found to be faulty,
                                      is deleted from the records.           Particular attention is paid to possible
                                      environmental changes in the vicinity of the analyser.
                                      Data is recorded monthly and compared with earlier results.
                                      Data is collated quarterly with that from other monitors within the Tees Valley,
                                      including AURN stations, as a further check on accuracy.
                                      All data is published annually (reference 1) by the Tees Valley Environmental
                                      Protection Group.


                    The Darlington nitrogen dioxide diffusion tube programme is operated through an approved
                    laboratory with formal accreditation to BS standards, and one that participates in the WASP
                    programme. Particular attention is paid to proper installation of the tubes at the site, and reliable
                    exposure duration. From time-to-time, a limited validation alongside an automatic analyser is
                    carried out.




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                                            DARLINGTON BOROUGH COUNCIL


3. DARLINGTON BOROUGH COUNCIL EMISSIONS OVERVIEW


Overview             The main sources of emissions are discussed below. Previous Review and Assessment reports
                     have clearly identified road traffic as being the main source of ground level air pollution within
                     Darlington, and this continues to be the case.


Residential          Darlington town is on the natural gas network, and is a smoke control area. Emissions from this
                     sector are considered area emissions of nitrogen oxides, carbon monoxide and some particulate
                     PM10, contributing to a relatively low background level. The larger outlying rural villages are also
                     smoke control areas. There are no significant coal burning areas.
                     Since 2003, there has been one significant residential development approved at West Park
                     (Faverdale). An environmental impact study showed no significant impact on air quality.


Education / Retail   As with residential areas, natural gas is the main fuel source, with emissions contributing to the
                     relatively low background level.
                     Since 2003, work has started on a new educational development on brownfield land along
                     Haughton Road. An environmental impact study showed no significant impact on air quality.
                     A new retail centre within the town centre has received planning approval, with an environmental
                     impact study showing no significant impact on air quality.


Commercial / Light   Light industry and many commercial operations (including petrol stations) are covered by part B
Industry             and A2 regulation by the local authority.     The 2005 list is shown in Appendix 3. Emissions are
                     very low, and have no significant impact on local air quality. Benzene emissions from petrol
                     stations are being reduced by the installation of vapour recovery from fuel deliveries.
                     Since 2003, an Argos distribution warehouse has been approved for the Faverdale area, again
                     with no significant impact on local air quality.


Heavy Industry       There is no significant heavy industry within the Darlington Council area. As in 2003, there are 5
                     IPC part A processes (Appendix 4) located across the Darlington / Sedgefield boundary to the
                     north.   These are regulated by the Environment Agency, and continue to have negligible
                     emissions.
                     In 2004, an existing process, Ellison Finishings Ltd on the Yarm Road Industrial Estate, has
                     come under the new IPPC regulation by the Environment Agency (NP3237PX). The licence
                     mainly covers water consents and has no impact on air quality.


Airport              Approval has been given for expansion to the Durham Tees Valley (formerly Teesside) airport,
                     which lies on the boundary between Darlington and Stockton-on-Tees Councils.                       An
                     environmental impact study has shown no significant impact on air quality in the region.


Railways             The main eastern rail route between London and Scotland passes through Darlington. Although
                     a busy main-line route, the line is electrified. Cross country main-line services, freight trains, and
                     the two branch lines to the East (Saltburn) and north-west (Bishop Auckland) are diesel
                     operated, but this traffic is relatively light and not considered a significant emission source.
                     This is no change from 2003.




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                                           DARLINGTON BOROUGH COUNCIL


Landfill Sites /     There are no landfill sites or quarries within the Council area. Three old quarries in neighbouring
Quarries             authorities are being used as landfill sites, but were shown in the 2003 Updating and Screening
                     Report to require no further investigation.
                     There is no change from 2003.


Major Fuel Storage   There are no major fuel storage depots handling petrol within the Darlington Council area.
Depots

Shipping             There is no shipping port within the Darlington Council area.


Boilers              There are no boilers >5MW thermal that burn coal or fuel oil within the Darlington Council area.
                     The Memorial hospital in Darlington has boilers/CHP plant of 11.5MW total capacity fuelled by
                     interruptible natural gas. Heavy fuel oil with less than 1% sulphur content is provided as a
                     backup, but has not been needed. No further assessment is required.


                     Hydro Polymers, based at Newton Aycliffe on the border with Sedgefield Council, have
                     boilers/CHP plant of 35MW normal running capacity, and fuelled by interruptible natural gas.
                     Gas oil with 0.2% sulphur content is provided as a backup.


Trunk Roads          The main AI (M) north / south motorway runs to the west of the town in a rural corridor. The A66
                     east / west trunk route by-passes the town to the south, again through a rural corridor. While
                     some development is taking place towards both routes, there is no air quality issue for target
                     members of the public.
                     This is no change over 2003.


Main Roads           Radiating out from the town centre, these roads are very busy, particularly during the main rush
                     hour period. Even so, traffic maintains a flow, houses are mainly set back from kerbside, and
                     there are no ‘canyon’ effect areas. Where brownfield sites have been redeveloped for housing or
                     commercial / light industry use, road access has been significantly improved to minimise further
                     road congestion.
                     There are no changes over 2003. The one major road change mentioned in 2003 was the
                     eastern transport corridor, formerly known as the cross town route (eastern section), but this has
                     not yet been given approval.       The main purpose of this scheme is to provide access to
                     development land to the west of the A66 by-pass, but it is also expected that there would be
                     significant reductions in traffic on two of the busiest road corridors in the town, Haughton Road
                     and Yarm Road.
                     In 2004, Darlington was selected as one of three towns selected by the DoT to participate in a
                     national sustainable travel project, looking at ways to tackle traffic congestion.


Town Centre          The town centre is protected by an inner ring road system, and which largely runs in a defined
                     transport corridor away from target group members of the public. Road traffic access within the
                     town centre is restricted to car parking and other access, with a one-way bus system now in
                     force. A pedestrianisation scheme for the central areas of the town, Northgate, Tubwell Row,
                     and High Row, started towards the end of 2005 and is due for completion in 2008.


Other Emission       None have been identified within the Darlington Council area.
Sources



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                                         DARLINGTON BOROUGH COUNCIL


4. POLLUTANT UPDATING and SCREENING PROCESS 2006


Section Format     This section of the main report will look at each of the seven air pollutants in sections 5 to 11,
                   under the following headings:


Objectives         A statement of the objectives, and any new proposals for the pollutant.


Overview           A general assessment of the sources of the pollutant.


Year 2000 R & A    A summary of the conclusions for the pollutant in the 2000 Review & Assessment.


Year 2003 R &A     A summary of the conclusions for the pollutant in the 2003 Updating & Screening report.


Monitoring Data    A record of monitoring data from within the Darlington area, and neighbouring Council areas
                   where relevant. Monitoring data is seen as the most important factor in delivering LAQM, and
                   wherever possible is ratified to standards in Government guidance, as recorded in reference 1.


Background         For most of the pollutants, DEFRA issue an estimate of expected concentrations in each square
Concentrations     kilometre grid of the Council area as a guide to possible areas of objective exceedance. For
                   nitrogen dioxide and particulate PM10 the estimate has been revised from 2001 to 2004. For
                   sulphur dioxide, carbon monoxide, benzene and 1,3-butadiene, the estimates are 2001.


Road Traffic       This looks at the likely impact of road traffic on pollutant concentrations.


Other Traffic      This looks at the likely impact of other transport forms such as rail and sea.


Part B Processes   This looks at the likely impact of small industrial processes regulated by Darlington Borough
                   Council.


Part A Processes   This looks at the likely impact of large industrial processes regulated by the Environment Agency.


Other Emitters     This covers any other significant sources not included above.


Conclusion         This will record whether air quality objectives will be met, and the extent to which further work will
                   be required.




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                                         DARLINGTON BOROUGH COUNCIL


5. NITROGEN DIOXIDE


Objectives        1. Maximum 40 µg/m³ as an annual mean with no exceedances, by December 2005
                  2. Maximum 200 µg/m³ as a 1 hour mean with up to 18 exceedances, by December 2005
                     This equates to the 99.8th percentile of hourly means

                  These objectives are provisional, but are equivalent to EU limit values, which are to be achieved
                  by 2010.


Overview          The main source of nitrogen dioxide pollution at ground level in the Darlington Council area is road
                  traffic. Natural gas is readily available for domestic, commercial and some industrial use, and
                  contributes to low background concentrations.           There are significant industrial sources in the
                  neighbouring Council areas of Stockton-on-Tees to the East, and Sedgefield to the North, but
                  comprehensive monitoring within the Tees Valley has shown industrial sources to have minimal
                  impact on nitrogen dioxide concentrations at ground-level.


Year 2000 R & A   3rd stage review & assessment was required to evaluate the extent to which target groups were
                  affected by nitrogen dioxide emissions from road traffic. Monitoring and modelling work showed
                  that there was no need to declare an Air Quality Management Area.


Year 2003 USR     The 2003 Updating and Screening report concluded that nitrogen dioxide concentrations across
                  the Darlington Council area continued to be below the national air quality objectives, with no need
                  to declare an Air Quality Management Area.
                  Road traffic was again identified as the major source of ground-level concentrations of nitrogen
                  dioxide, and it was proposed to carry out a more detailed assessment of certain road areas with
                  slow moving traffic and a higher than average bus flow. This study was completed in July 2005,
                  and is attached to this report as report C.


Monitoring Data   A Local continuous monitoring station has been located near the town centre of Darlington, at a
(Report B)
                  busy roundabout on the inner ring road, from February 2001 to April 2004, with a new station
                  operating since October 2005. This is a kerbside site, with no target groups at the annual mean
                  level, but represents a ‘worst case’ situation for the town.


                  Darlington (St Cuthbert’s Way) Local station ratified full year data is as follows, all in µg/m³:
                  (note 2004 / 5 annual mean data has been annualised using the Stockton (Yarm) kerbside AURN station)


                                                        2005 (3 months)      2004(4 months)    2003        Objective

                                      annual mean       41                   34                36          40

                      max 1-hour (exceedances)          159                  108               127         200 (18)
                                 th
                             99.8 Percentile            126                  102               101         200

                  The levels reflect that expected at a busy town centre roundabout with low traffic speeds.
                  Although the limited 2005 data has suggested a slight exceedance, there are no target groups
                                                                                                                         th
                  present at this location. At the 1-hour level, for which target groups may be present, the 99.8
                  percentiles are all well below the objective limit showing minimal risk to the public.
                  This location was also looked at in the road model assessment (report C page 7), and showed no
                  exceedance of the annual mean.




                                                         14
                                           DARLINGTON BOROUGH COUNCIL


Monitoring Data   The original St Cuthbert’s Way monitor was moved to a new roadside location at Cockerton
(continued)
                  Bridge, with measurements from November 2004.


                  Darlington (Cockerton Bridge) Local station ratified full year data is as follows, all in µg/m³:


                                                        2005                2004 (2 months)    2003      Objective

                                       annual mean      24                  -                  -         40

                      max 1-hour (exceedances)          132 (0)             -                  -         200 (18)
                                 th
                            99.8 Percentile             88                 -                   -         200

                  This location is on a busy town centre roundabout and reflects the nearest building façade line.
                  Both objectives are readily met. 3 diffusion tubes were also used at the monitor during 2005 for a
                  co-location study, with reasonable correlation (bias factor 1.05).
                  This location was also looked at in the road model assessment (report C page 9), and also
                  showed good correlation.


                  Darlington also have a nitrogen dioxide diffusion tube monitoring programme for measuring annual
                  mean concentrations at ten locations, four of which have been part of the National (N) programme.
                  Results are as follows, all in µg/m³ and adjusted for tube bias factors:


                  Objective 40 µg/m³                    2005                2004               2003
                  Northgate (N kerbside)                41                  39                 49
                  Salters Lane (N Kerbside)             35                  28                 29
                  Hundens Depot (N Background)          23                  19                 22
                  Arts Centre (N Background)            16                  15                 19
                  Woodland Road (Kerbside)              39                  34                 37
                  Blackwell Bridge (Kerbside)           35                  32                 40
                  North Road Station (Kerbside)         36                  32                 38
                  Haughton Green (Kerbside)             43                  37                 38
                  Yarm Road (Kerbside)                  30                  28                 32
                  Middleton St George (Background)      12                  12                 14


                  The results of the diffusion tube survey support the general findings that kerbside sites with slow
                  moving heavy traffic, such as the Northgate and Haughton Green sites above, have nitrogen
                  dioxide levels around the objective level. They do not have target groups present. Other urban
                  kerbside locations, with busy roads but more free-flowing traffic, have significantly lower
                  concentrations, comfortably within the objective levels.         Background sites are well within the
                  objective levels.
                  These sites were also looked at in the road model assessment (report C pages 7 - 9). It was
                  noted that kerbside diffusion tubes tended to read up to 20% high.


                  Four AURN continuous monitoring stations are situated in the Tees Valley Council areas of
                  Middlesbrough, Redcar & Cleveland and Stockton-on-Tees, all to the East of Darlington. The
                  Middlesbrough, Redcar & Cleveland and Stockton-on-Tees (Billingham) stations are close to main
                  industrial areas, and while there are no similar locations within the Darlington Council area, results
                  show that the nitrogen dioxide objectives are met, and that industrial emissions do not have a
                  significant impact on ground level concentrations.



                                                         15
                                          DARLINGTON BOROUGH COUNCIL


Monitoring Data   The Stockton-on-Tees (Yarm) station is a kerbside station on a congested town centre High street;
(continued)
                  and the results again demonstrate the impact that slow moving traffic can have on nitrogen dioxide
                  concentrations, as follows:


                  Stockton-on-Tees (Yarm) AURN station ratified full year data, all in µg/m³:


                                                         2005            2004               2003      Objective

                                    annual mean          35              36                 43        40

                      max 1-hour (exceedances)           264 (2)         136 (0)            224 (1)   200 (18)
                               th
                           99.8 Percentile               117             109                135       200


                  As with the Darlington St Cuthbert’s Way kerbside location, annual means are close to the
                  objective, but no target groups are present. 1-hour means show an occasional exceedance, but
                      th
                  99.8 percentiles are well below the objective.


                  A further three Local continuous monitoring stations are located in the Tees Valley Council areas
                  of Middlesbrough and Hartlepool. These also show no exceedances.


                  Overall, the monitoring data shows perhaps the early signs of traffic related emissions of nitrogen
                  dioxide falling as a result of improving engine and exhaust technology, but it is not yet conclusive.
                  Where traffic is slow moving and heavy, there is a risk of the annual mean objective being
                  exceeded, even in the absence of ‘canyon’ effect conditions. However there are no target groups
                  at these locations. The 1-hour objective, on the other hand, show the occasional exceedance, and
                                                                                       th
                  while target groups may be present at this type of location, the 99.8 percentile concentrations are
                  invariably well below the objective.


                  The comprehensive monitoring data available in Darlington and the other Tees Valley Council
                  areas shows that the National objectives were not exceeded within the Darlington Council area in
                  2005, and are unlikely to be exceeded in 2010.




Background        Nationally derived background concentrations of nitrogen dioxide as an annual mean for each
Concentrations    square kilometre grid across the Council area, updated for 2004, with projections for 2005 and
(Appendix 1a)
                  2010, are as follows:
                                                         2004            2005               2010
                           maximum µg/m³                 21.5            21.3               19.0
                           minimum µg/m³                 7.6             7.3                6.1


                  These show that the National annual mean objective of 40 µg/m³ is comfortably met across the
                  whole of the Darlington Council area, which supports the monitoring data.                The maximum
                  projections show a very small increase (less than 1%) over the earlier projections from 2001, but
                  the minimum projections are significantly lower.




                                                         16
                                          DARLINGTON BOROUGH COUNCIL


Road Traffic       Road traffic is the major source of nitrogen dioxide at ground level. Darlington does not have high
(Appendix 2)
                   traffic flows, and there are no significant road areas with ‘canyon’ effect. Housing and other target
                   group areas such as schools and hospitals tend to be set well back from the roadside, and there
Narrow streets     are no narrow and congested streets with residential properties close to the kerb, particularly on
                   the main roads.


Road junctions     All road junctions have been identified and analysed (report C page 11). All have an open aspect,
                   with no target groups identified. Five of the junctions have been modelled using DMRB, and show
                   no exceedances.


Bus station        Road traffic within the town centre is heavily restricted. In the absence of a bus station, buses
                   have the principal access with a new one-way system, and the town centre area is increasingly
1 hour exposure    being pedestrianised. No busy streets have been identified where people may spend more than
                   one hour close to heavy traffic.


Town on the move   Darlington is now one of three towns selected by the DoT to look at ways to reduce traffic
                   congestion, calling their project ‘Town on the Move’.             Part of this project is to have a
                   comprehensive traffic count scheme across the town, which will help future air quality analysis.
                   Darlington has also been selected as one of six cycling demonstration towns, receiving DoT
                   funding over three years to promote cycling and develop new cycling routes.


2010 projection    The continuous monitoring results shown earlier have shown that there were no roadside areas
                   within Darlington that exceeded 41 µg/m³ as an annual mean in 2005, with no target groups
                   present.   Updated Technical guidance factors (page 6-9) show that this highest level can be
                   expected to fall to 35 µg/m³ by 2010, comfortably below the annual mean objective, even with no
                   target groups present.


DMRB study         Recognising that road traffic is the major source of ground level nitrogen dioxide pollution,
                   Darlington, along with the other 4 Tees Valley Councils, have used the new DMRB road traffic
                   model to look at those roadside areas where target groups may be present, eg building façades.
                   The results are attached as report C, and confirm that the model is provides a good representation
                   of nitrogen dioxide road traffic pollution.       15 roadside locations were investigated, and all
                   confirmed no exceedances of the nitrogen dioxide annual mean objective.


New roads          The one major road change proposed in the current ten-year plan is the eastern transport corridor,
                   formerly known as the cross-town route (eastern section). The main purpose of this scheme is to
                   provide access to development land to the west of the A66 by-pass, but it is also expected that
                   there will be significant reductions in traffic on two of the busiest road corridors in the town,
                   Haughton Road and Yarm Road. The project has yet to receive approval, but is expected to go
                   ahead.


Other Transport    The main eastern rail route between London and Scotland passes through Darlington. Although a
                   busy main-line route, the line is electrified. Cross country main-line services, freight trains, and the
                   two branch lines to the East (Saltburn) and north-west (Bishop Auckland) are diesel operated, but
                   this traffic is relatively light and not considered a significant nitrogen dioxide source.




                                                           17
                                          DARLINGTON BOROUGH COUNCIL


Airport            The Durham Tees Valley (formerly Teesside) airport lies across the rural boundary between
                   Darlington and Stockton-on-Tees to the east of Darlington town. The airport throughput (2005) is
                   just under 1mppa, well below the 5mppa threshold given in Technical Guidance.
                   Approval has been given for expansion and an environmental impact study has shown no
                   significant impact on air quality in the region.




Part B Processes   There are 28 Part B small industrial processes, 12 petrol stations and 6 small waste oil burners
(Appendix 3)
                   (<0.4MW) registered within the Council area, but none are noted as significant sources of nitrogen
                   dioxide.




Part A Processes   There is one Part A industrial process fully within the Council area and another two which straddle
(Appendix 4)
                   the northern border between Darlington and Sedgefield Council areas; all of which are low
                   emitters of nitrogen oxides.      A number of other industrial processes are situated within the
                   Sedgefield Council area to the North, but these are also relatively small emitters of nitrogen
                   oxides. The large nitrogen oxide emitters, located in the Tees Valley Council areas to the East,
                   are too far away and on an infrequent wind direction for any impact to be noted.


                   Industrial emissions have not increased over the last five years, and with the comprehensive
                   monitoring of nitrogen dioxide across the region, it is not considered necessary to carry out further
                   investigation on industrial emissions within the Darlington Council area.




Other Emitters     No other significant emission sources have been identified.




Conclusion         Nitrogen dioxide concentrations across the Darlington Council area are, and will continue to be,
                   below the national air quality objectives, and there is no need to declare any Air Quality
                   Management Areas. Road traffic will continue to be the main source of nitrogen dioxide ground
                   level pollution.




                                                           18
                                         DARLINGTON BOROUGH COUNCIL


6. PARTICULATE PM10


Objectives        1. Maximum 40 µg/m³ (g)* as an annual mean with no exceedances, by December 2004
                  2. Maximum 50 µg/m³ (g)* as a 24-hour mean with up to 35 exceedances, by December 2004
                  (* Note that these values are based on gravimetric (g) measurement).


                  The Government have published proposals to tighten the objectives further for December 2010,
                  but these are not a formal part of the current Review & Assessment process, and are unlikely to be
                  passed into regulation before 2008. However, an assessment will be made of the likelihood of
                  these objectives being met. The proposed objectives are:


                  3. Maximum 20 µg/m³ (g)* as an annual mean with no exceedances, by December 2010
                  4. Maximum 50 µg/m³ (g)* as a 24-hour mean with up to 7 exceedances, by December 2010
                  (* Note that these values are based on gravimetric (g) measurement).




Overview          There are a wide variety of sources of particulate PM10, most notably traffic, construction work,
                  industry, quarrying, and all forms of coal burning. There are also natural sources, such as pollen,
                  and near coastal areas, sand and salt. National studies have also shown occasional atmospheric
                  import of particle pollution from the continent, more so in Southern regions of the UK.


                  Within the Darlington Council area, natural gas is readily available for domestic, commercial and
                  some industrial use, and there is little coal burning outside of small rural villages.     Industrial
                  sources in Tees Valley Council areas to the East can be major emitters, but these are too far away
                  and on an infrequent wind direction, to have major impact. Road traffic is moderate, but is likely to
                  be the most significant source of ground-level concentrations.




Year 2000 R & A   3rd stage review & assessment was required to evaluate the extent to which target groups were
                  affected by particulate PM10 emissions from road traffic. Monitoring and modelling work showed
                  that there was no need to declare an Air Quality Management Area.




Year 2003 USR     The 2003 Updating and Screening report concluded that particulate PM10 concentrations across
                  the Darlington Council area continued to be below the national air quality objectives, with no need
                  to declare an Air Quality Management Area.
                  Road traffic was again identified as the major source of ground-level concentrations of particulate
                  PM10, and it was proposed to carry out a more detailed assessment of certain road areas with
                  slow moving traffic and a higher than average bus flow. This study was completed in July 2005,
                  and is attached to this report as report C.




Monitoring Data   All monitoring results included in this section have been obtained using TEOM instruments. The
(Report B)
                  results have been multiplied by the technical guidance factor of 1.3 to estimate the gravimetric
                  equivalent.




                                                          19
                                        DARLINGTON BOROUGH COUNCIL


Monitoring Data   A Local continuous monitoring station has been located near the town centre of Darlington, at a
(continued)
                  busy roundabout on the inner ring road from February 2001 to April 2004, with a new station
                  operating since October 2005. This is a kerbside site, with no target groups at the annual mean
                  level, but represents a ‘worst case’ situation for the town.


                  Darlington (St Cuthbert’s Way) Local station ratified full year data is as follows, all in µg/m³ (g):
                  (note 2004 / 5 annual mean data has been annualised using the Stockton (Yarm) kerbside AURN station)


                                                        2005 (4 months)     2004 (4 months)    2003      objective

                                     annual mean        31                  31                 32        40

                      max 24-hour (exceedances)         77 (8)              77 (11)            103 (49) 50 (35)
                           90th Percentile              49                  49                 56        50


                  Although there has been no exceedance at this station at the annual mean level, 2003 saw an
                  exceedance of the 24 hour objective due to unusually prolonged periods of high pressure in the
                  first 4 months, in common with the rest of the Tees Valley, and much of the UK. The levels reflect
                  that expected at a busy town centre roundabout with low traffic speeds, but there are no target
                  group members of the public nearby.
                  This location was also looked at in the road model assessment (report C page 7), and also
                  showed no exceedance of the annual mean.


                  The original St Cuthbert’s Way monitor was moved to a new roadside location at Cockerton
                  Bridge, with measurements from November 2004.


                  Darlington (Cockerton Bridge) Local station ratified full year data is as follows, all in µg/m³:


                                                        2005                2004 (2 months)    2003      Objective

                                     annual mean        20                  -                  -         40

                      max 24-hour (exceedances)         53 (1)              -                  -         50 (35)

                           90th Percentile              31                  -                  -         50


                  This location is on a busy town centre roundabout and reflects the nearest building façade line
                  where target members of the public may be present. Both objectives are readily met.
                  This location was also looked at in the road model assessment (report C page 9), and also
                  showed good correlation.


                  A variety of roadside sites, including all nitrogen dioxide diffusion tube locations, were also looked
                  at in the road model assessment (report C pages 7 - 9). All showed no exceedance of the annual
                  mean.


                  Three AURN continuous monitoring stations are situated in the Tees Valley Council areas of
                  Middlesbrough, Redcar & Cleveland and Stockton-on-Tees, all to the East of Darlington. The
                  Middlesbrough and Redcar & Cleveland stations are close to main industrial areas, and while
                  there are no similar locations within the Darlington Council area, results show that the particulate
                  PM10 objectives are met. The results also indicate that industrial emissions tend to be more
                  sporadic, either due to a fugitive nature, or the variable weather conditions. Report B attached has
                  the details.



                                                         20
                                          DARLINGTON BOROUGH COUNCIL


Monitoring Data   The Stockton-on-Tees (Yarm) station is a kerbside station on a congested town centre High street;
(continued)
                  and the results again demonstrate the impact that slow moving traffic can have on particulate
                  PM10 concentrations, as follows:


                  Stockton-on-Tees (Yarm) AURN station ratified full year data, all in µg/m³(g):


                                                      2005               2004              2003      Objective

                                     annual mean      26                 27                32        40

                      max 24-hour (exceedances)       79 (5)             67 (12)           95 (48)   50 (35)
                              th
                           90 Percentile              40                 41                57        50


                  As with the Darlington St Cuthbert’s Way kerbside location, annual means are well within the
                  objective level, and no target groups are present. 24-hour means showed an exceedance in 2003
                  due to the unusual high pressure conditions mentioned earlier, but have fallen back since.


                  A further four Local continuous monitoring stations are located in the Tees Valley Council areas of
                  Middlesbrough, Hartlepool and Stockton-on-Tees. These also show no exceedances, and help to
                  demonstrate that that particulate PM10 levels fall off rapidly away from the roadside. Report B
                  attached has the details.


                  The comprehensive monitoring data available in Darlington and the other Tees Valley Council
                  areas shows that the 2004 annual mean objective for particulate PM10 was not exceeded within
                  the Darlington Council area in 2005, and is unlikely to be exceeded in subsequent years. The 24
                  hour objective may show an exceedance if weather conditions prevent dispersal over a prolonged
                  period, but this is unlikely where target groups may be present.


                  In all cases, the results show that the provisional 2010 objectives for particulate PM10 are less
                  likely to be met in all areas.




Background        Nationally derived background concentrations of particulate PM10 as an annual mean for each
Concentrations    square kilometre grid across the Council area, updated for 2004, with projections for 2005 and
(Appendix 1b)
                  2010, are as follows:
                                                      2004               2005              2010
                           maximum µg/m³(g)           19.3               19.3              18.2
                           minimum µg/m³(g)           14.2               14.1              13.2


                  These show that the National annual mean objective of 40 µg/m³(g) is comfortably met across the
                  whole of the Darlington Council area, which supports the monitoring data.               The maximum
                  projections show a small increase (less than 5%) over the earlier projections from 2001, but the
                  minimum projections are a fraction lower.




                                                       21
                                         DARLINGTON BOROUGH COUNCIL


Road Traffic       Road traffic is the major source of particulate PM10 at ground level, in particular diesel-powered
(Appendix 2)
                   vehicles. Darlington does not have high traffic flows, and there are no significant road areas with
                   ‘canyon’ effect. Housing and other target group areas such as schools and hospitals tend to be
Narrow streets     set well back from the roadside, and there are no narrow and congested streets with residential
                   properties close to the kerb, particularly on the main roads.


Road junctions     All road junctions have been identified and analysed (report C page 11). All have an open aspect,
                   with no target groups identified. Five of the junctions have been modelled using DMRB, and show
                   no exceedances.


Bus station        Road traffic within the town centre is heavily restricted. In the absence of a bus station, buses
                   have the principal access with a new one-way system, but traffic flows are low. The town centre
                   area is increasingly being pedestrianised


Town on the move   Darlington is now one of three towns selected by the DoT to look at ways to reduce traffic
                   congestion, calling their project ‘Town on the Move’.            Part of this project is to have a
                   comprehensive traffic count scheme across the town, which will help future air quality analysis.
                   Darlington has also been selected as one of six cycling demonstration towns, receiving DoT
                   funding over three years to promote cycling and develop new cycling routes.


2010 projection    The continuous monitoring results shown earlier have shown that there were no roadside areas
                   within Darlington that exceeded 31 µg/m³(g) as an annual mean in 2005, with no target groups
                   present.   Updated Technical guidance factors (page 6-9) show that this highest level can be
                   expected to fall to 29 µg/m³ by 2010, comfortably below the annual mean objective, even with no
                   target groups present.


DMRB study         Recognising that road traffic is the major source of ground level particulate PM10 pollution,
                   Darlington, along with the other 4 Tees Valley Councils, have used the new DMRB road traffic
                   model to look at those roadside areas where target groups may be present, eg building facades.
                   The results are attached as report C, and confirm that the model is provides a good representation
                   of particulate PM10 road traffic pollution.       15 roadside locations were investigated, and all
                   confirmed no exceedances of the particulate PM10 objectives.


New roads          The one major road change proposed in the current ten year plan is the eastern transport corridor,
                   formerly known as the cross town route (eastern section). The main purpose of this scheme is to
                   provide access to development land to the west of the A66 by-pass, but it is also expected that
                   there will be significant reductions in traffic on two of the busiest road corridors in the town,
                   Haughton Road and Yarm Road. The project has yet to receive approval, but is expected to go
                   ahead.




Other Transport    The main eastern rail route between London and Scotland passes through Darlington. Although a
                   busy main-line route, the line is electrified. Cross country main-line services, freight trains, and the
                   two branch lines to the East (Saltburn) and north-west (Bishop Auckland) are diesel operated, but
                   this traffic is relatively light and not considered a significant particulate PM10 source.




                                                          22
                                          DARLINGTON BOROUGH COUNCIL


Airport            The Durham Tees Valley (formerly Teesside) airport lies across the rural boundary between
                   Darlington and Stockton-on-Tees to the east of Darlington town. The airport throughput (2005) is
                   just under 1mppa, well below the 5mppa threshold given in Technical Guidance.
                   Approval has been given for expansion and an environmental impact study has shown no
                   significant impact on air quality in the region.




Part B Processes   There are 28 Part B small industrial processes, 12 petrol stations and 6 small waste oil burners
(Appendix 3)
                   (<0.4MW) are registered within the Council area, but none are noted as significant sources of
                   particulate PM10.




Part A Processes   There is one Part A industrial process fully within the Council area and another two which straddle
(Appendix 4)
                   the northern border between Darlington and Sedgefield Council areas; all of which are low
                   emitters of particulate PM10.      A number of other industrial processes are situated within the
                   Sedgefield Council area to the North, but these are also relatively small emitters of particulate
                   PM10. The large potential emitters, located in the Tees Valley Council areas to the East, are too
                   far away and on an infrequent wind direction for any impact to be noted.


                   Industrial emissions have not increased over the last five years, and with the comprehensive
                   monitoring of particulate PM10 across the region, it is not considered necessary to carry out
                   further investigation on industrial emissions within the Darlington Council area.




Other Emitters     No other significant emission sources have been identified.




Conclusion         Particulate PM10 concentrations across the Darlington Council area are, and will continue to be,
                   below the national air quality objectives, and there is no need to declare any Air Quality
                   Management Areas. Road traffic will continue to be the main source of particulate PM10 ground
                   level pollution.
                   It is noted that the provisional 2010 objectives for particulate PM10 are less likely to be met in all
                   areas.




                                                           23
                                          DARLINGTON BOROUGH COUNCIL


7. SULPHUR DIOXIDE



Objectives        1. Maximum 266 µg/m³ as a 15-minute mean with up to 35 exceedances, by December 2005
                  2. Maximum 350 µg/m³ as a 1-hour mean with up to 24 exceedances, by December 2004
                  3. Maximum 125 µg/m³ as a 24-hour mean with up to 3 exceedances, by December 2004


Overview          Natural gas is readily available for domestic, commercial and some industrial use, and low
                  sulphur diesel fuel is widespread. There is no coal burning outside of small rural villages, where
                  the impact on sulphur dioxide levels is minimal.


                  The main source of sulphur dioxide pollution is from large industrial processes using higher
                  sulphur fuels and waste products. There are no large industrial emitters within the Darlington
                  Council area. Industrial sources in neighbouring Council areas to the South are major emitters,
                  but comprehensive monitoring has shown industrial sources to have minimal impact at ground
                  level.


Year 2000 R & A   The first detailed Review and Assessment in 2000 concluded that there was no need to proceed
                  beyond the 2nd stage review and assessment.




Year 2003 USR     The 2003 Updating and Screening report concluded that sulphur dioxide concentrations across
                  the Hartlepool Council area continued to be well below the national air quality objective, with no
                  need to proceed further.




Monitoring Data   Darlington monitored sulphur dioxide in the centre of the town using an 8-port instrument,
(Reference 1)
                  providing annual mean and maximum 24-hour levels. Monitored levels were consistently low,
                  with 24 hour means less than 25 µg/m³ (objective max 125). As monitored levels were at or
                  below the level of accuracy of this type of monitor, the station was closed in 2004.


                  Over the period 1999 – 2002, a mobile continuous monitoring station was also used to monitor
                  concentrations alongside the inner ring road over 3 months, at an urban background location
                  over 3 months, and near the Teesside airport over 6 months. Monitored levels were consistently
                  low at each location.
                  In the absence of new significant sources of sulphur dioxide emissions within the Darlington
                  Council area, there will be no need for further monitoring.


                  Two AURN continuous monitoring stations are situated in the Tees Valley Council areas of
                  Middlesbrough and Redcar & Cleveland, well to the East of the Darlington Council area.
                  Although the stations are close to the main industrial areas, with Redcar & Cleveland station
                  more on a prevailing wind direction, both show full compliance with the sulphur dioxide
                  objectives. Two local continuous monitoring stations are located in the Tees Valley Council areas
                  of Stockton-on-Tees and Hartlepool. Both are also located near to industrial areas, and also
                  show full compliance with the sulphur dioxide objectives.




                                                        24
                                         DARLINGTON BOROUGH COUNCIL


Background         Nationally derived background concentrations of sulphur dioxide as an annual mean for each
Concentrations     square kilometre grid across the Council area for 2001, with projections to 2004 / 2005 using the
                   0.75 factor in Technical Guidance, are as follows:


                                                        2001               2004 / 2005
                            maximum µg/m³               3.1                2.3
                            minimum µg/m³               1.9                1.4


                   Analysis of monitoring data in the Tees Valley indicates that if annual means of sulphur dioxide
                   are below 10 µg/m³, there will be no exceedances at the 24-hour mean, 1-hour mean, or the 15-
                   minute mean level. The background data suggests that all three National objectives are readily
                   met throughout the Council area.




Domestic Sources   The majority of dwellings within the Darlington Council area are covered by smoke control orders,
                   and the principal fuel is now natural gas. A number of rural villages are excluded, but the larger
                   villages are supplied with natural gas, and the smaller villages with less than 100 dwellings are
                   not significant coal burning areas. No further action is required.




Road Traffic       Road traffic is not a significant source of sulphur dioxide, and does not require analysis.
(Appendix 2)



Rail Traffic       The main eastern rail route between London and Scotland passes through Darlington. Although
                   a busy main-line route, the line is electrified, with only a few inter-city diesel operated trains.
                   Cross country main-line services, freight trains, and the two branch lines to the East (Saltburn)
                   and north-west (Bishop Auckland) are diesel operated, but this traffic is relatively light. Railway
                   operators have confirmed that there are no locations where diesel locomotives are regularly
                   stationary for more than 15 minutes, and no further action is required.




Shipping           There is no shipping port within the Darlington Council area.




Boilers            There are no boilers >5MW thermal that burn coal or fuel oil within the Darlington Council area.
                   The Memorial hospital in Darlington has boilers/CHP plant of 11.5MW total capacity fuelled by
                   interruptible natural gas. Heavy fuel oil with less than 1% sulphur content is provided as a
                   backup, but has not been needed. No further assessment is required.


                   Hydro Polymers, based at Newton Aycliffe on the border with Sedgefield Council, have
                   boilers/CHP plant of 35MW normal running capacity, and fuelled by interruptible natural gas.
                   Gas oil with 0.2% sulphur content is provided as a backup, but has not been required since 2001
                   when the company changed their gas supplier. No further assessment is required.




                                                         25
                                         DARLINGTON BOROUGH COUNCIL


Part B Processes   There are 28 Part B small industrial processes, 12 petrol stations and 6 small waste oil burners
(Appendix 3)
                   (0.4MW) registered within the Council area, but none are noted as significant sources of sulphur
                   dioxide.




Part A Processes   There is one Part A industrial process fully within the Council area, which has no release of
(Appendix 4)
                   sulphur dioxide. Another two Part A processes straddle the northern border between Darlington
                   and Sedgefield Council areas, and release up to 10tpa of sulphur dioxide.          This is not a
                   significant factor in ground level concentrations. A further 6 Part A processes are located on an
                   industrial estate within the Sedgefield Council area, close to the Darlington border. Emissions of
                   sulphur dioxide total less than 10tpa, and are not significant.
                   There are a number of large sulphur dioxide emitters located in the neighbouring Council areas
                   of Redcar & Cleveland and Stockton-on-Tees to the East. Their emissions are too far away, and
                   on an infrequent wind direction, to have any influence in the Darlington Council area. This is
                   confirmed by monitoring results in the neighbouring Council areas.




Other Emitters     No other significant emission sources have been identified.




Conclusion         Sulphur dioxide concentrations across the Darlington Council area are, and will continue to be,
                   below the national air quality objectives. There is no need to proceed further.




                                                         26
                                        DARLINGTON BOROUGH COUNCIL


8. CARBON MONOXIDE


Objective         Maximum 10 mg/m³ as an 8-hour running mean by December 2003, with no exceedances




Overview          The main source of carbon monoxide pollution at ground level in the Darlington Council area is
                  from road traffic. Natural gas is readily available for domestic, commercial and some industrial
                  use, and contributes to low background levels.        There are no significant large industrial
                  processes within the Council area, or close to its borders. The large industrial emitters within
                  the Tees Valley are well to the East of Darlington, and are too far away, and on an infrequent
                  wind direction, to have any impact within the Darlington Council area.




Year 2000 R & A   The first detailed Review and Assessment in 2000 concluded that there was no need to
                  proceed beyond the 2nd stage review & assessment.




Year 2003 USR     The 2003 Updating and Screening report concluded that carbon monoxide concentrations
                  across the Darlington Council area continued to be well below the national air quality objective,
                  with no need to proceed further.


Monitoring Data   There are no fixed continuous monitoring stations within the Darlington Council area.
(Reference 1)

                  A mobile continuous monitoring station was used over the period 1999 – 2002 to monitor
                  concentrations alongside the inner ring road over 3 months, at an urban background location
                  over 3 months, and near the Teesside airport over 6 months. The results showed that while
                  concentrations close to busy roads are higher than elsewhere, the levels are well below the
                  objective level.


                  Further evidence is provided by an AURN continuous monitor at the Stockton-on-Tees (Yarm)
                  site. This is a kerbside location on a very busy town centre road, and represents a worst-case
                  example for Darlington. The maximum 8-hour running mean does not exceed 2.5 mg/m³, well
                  below the objective level.
                  Two AURN continuous monitors operate in the Tees Valley Council areas of Middlesbrough
                  (urban industrial) and Redcar & Cleveland (suburban), both well to the East of Darlington.
                  Although close to large industrial emitters, the maximum 8-hour running mean levels recorded
                  has been 4.5 mg/m³, well below the objective level, with typical levels in the range 0.5 to 1.5
                  mg/m³.


Background        Nationally derived background concentrations of carbon monoxide for each square kilometre
Concentrations
                  grid across the Council area for 2003 were predicted to be between 0.16 mg/m³ and 0.25
                  mg/m³. Although there is no clear relationship between annual mean and 8- hour running
                  mean, a worst case factor from the Tees Valley AURN continuous monitors for the 8-hour
                  running mean is maximum 7 times the annual mean. Using this worst-case factor, background
                  concentrations as an 8-hour running mean within the Darlington Council area will not exceed 2
                  mg/m³, well below the objective level of 10 mg/m³.



                                                       27
                                         DARLINGTON BOROUGH COUNCIL


Road Traffic       The highest daily average traffic flows (ADT) for the principal roads in 2005 are used as the
(Appendix 2)
                   worst-case for carbon monoxide in 2005, and compared with technical guidance criteria for
                   possible objective exceedances, as follows:


                   Vehicles / day                        Technical Guidance                  Darlington
                                                         max ADT                             max ADT 2005
                   single carriageway                    80,000                              30,000
                   dual carriageway                      120,000                             40,000
                   motorway                              140,000                             50,000


                   The worst-case junction does not exceed 50,000 vehicles / day as a combined ADT in 2005,
                   and there are no areas of road with ‘canyon’ characteristics. The planned eastern transport
                   corridor will not be a significant factor for carbon monoxide.




Other Transport    The main eastern rail route between London and Scotland passes through Darlington.
                   Although a busy main-line route, the line is electrified. Cross country main-line services, freight
                   trains, and the two branch lines to the East (Saltburn) and north-west (Bishop Auckland) are
                   diesel operated, but this traffic is relatively light and not considered a significant carbon
                   monoxide source.




Part B Processes   There are 28 Part B small industrial processes, 12 petrol stations and 6 small waste oil burners
(Appendix 3)
                   (<0.4MW) registered within the Council area, but they are not significant sources of carbon
                   monoxide.




Part A Processes   There is one Part A industrial process fully within the Council area, which has no release of
(Appendix 4)
                   carbon monoxide.      Another two Part A processes straddle the northern border between
                   Darlington and Sedgefield Council areas, again with no releases of carbon monoxide. A further
                   6 Part A processes are located on an industrial estate within the Sedgefield Council area, close
                   to the Darlington border have no recorded releases of carbon monoxide.


                   There are a number of large carbon monoxide emitters located in the Tees Valley Council
                   areas of Redcar & Cleveland and Hartlepool to the East but their emissions are too far away,
                   and on an infrequent wind direction, to have any influence in the Darlington Council area. This
                   is confirmed by monitoring results in the neighbouring Council areas, as reported above.




Other Emitters     No other significant emission sources have been identified.




Conclusion         Carbon monoxide concentrations across the Darlington Council area are, and will continue to
                   be, well below the national air quality objective. There is no need to proceed further.




                                                         28
                                          DARLINGTON BOROUGH COUNCIL


9. BENZENE


Objectives        1. Maximum 16.25 µg/m³ as a running annual mean by December 2003, with no exceedances
                  2.   Maximum 5.00 µg/m³ as an annual mean by December 2010, with no exceedances


Overview          Road transport is the most significant source of benzene within the Darlington Council area.
                  There are no large industrial processes in or around the Council area, although a number of
                  industrial processes with benzene emissions are located within the Tees Valley Council areas of
                  Redcar & Cleveland and Stockton-on-Tees, to the East. These are too far away, and on an
                  infrequent wind direction, to have any impact.


Year 2000 R & A   The first detailed Review and Assessment in 2000 concluded that there was no need to proceed
                  beyond the 1st stage review & assessment. There have been no new or significantly changed
                  emission sources locally, or in neighbouring authorities since that time.


Year 2003 USR     The 2003 Updating and Screening report concluded that benzene concentrations across the
                  Darlington Council area continued to be well below the national air quality objective, with no need
                  to proceed further.


Monitoring Data   There is no continuous monitoring of benzene concentrations within the Darlington Council area,
(Reference 1)
                  although diffusion tube studies have been carried out in the past. The 1999 annual mean at a
                                                 3
                  busy road junction was 2.6 µg/m , well below the objective. Technical guidance factors would
                  predict levels to fall to 2.3 µg/m³ by 2003, and 1.7 µg/m³ by 2010.


                  Pumped diffusion tube monitoring of benzene is carried out within the Stockton-on-Tees Council
                  (Yarm) to the East, at a kerbside site on a very busy road. Annual means are now below 3
                  µg/m³, and technical guidance factors predict levels to fall to 2.5 µg/m³. This location represents
                  a worst-case example for Darlington.


                  Pumped diffusion tube monitoring of benzene is also carried out within the Middlesbrough
                  Council area to the East, close to the main industrial emitters of benzene. Annual means are
                  below 2.5 µg/m³, almost entirely due to the industrial releases. Concentrations continue to fall as
                  a result of process improvements.


                  Levels of benzene concentrations within the Darlington Council area will meet both benzene
                  objectives.


Background        Nationally derived background concentrations of benzene as an annual mean for each square
Concentrations    kilometre grid across the Council area for 2001, and projections to 2003 and 2010, are as
                  follows, all in µg/m³
                                                       2001               2003                2010
                                                       Objective          16.25               5.0
                           maximum µg/m³               0.4                0.4                 0.4
                           minimum µg/m³               0.2                0.2                 0.1


                  These are well below either benzene objective.



                                                         29
                                           DARLINGTON BOROUGH COUNCIL


Road Traffic         The highest daily average traffic flows (ADT) for the principal roads in Darlington will continue to
(Appendix 2)
                     be less than half of the technical guidance criteria for possible objective exceedances beyond
                     2010.


                     The worst-case junction does not exceed 50,000 vehicles / day as a combined ADT in 2005 or
                     55,000 vehicles / day in 2010, and there are no areas of road with ‘canyon’ characteristics.


                     The planned eastern transport corridor will not be a significant factor for benzene.


Other Transport      No significant sources.


Part B Processes     There are 28 Part B small industrial processes and 6 small waste oil burners (<0.4MW)
(Appendix 3)
                     registered within the Council area, but there are no sources of benzene.


Petrol Stations      There are 12 petrol stations registered with a throughput in excess of 500m³ per year, down from
                     15 in 2003. All of the stations have Stage 1 petrol vapour recovery on underground storage
                     tanks but, as there is no current requirement, they are not fitted with Stage 2 vapour recovery at
                     the dispensing pumps. Technical guidance advises that it is only necessary to consider those
                     petrol stations with a throughput in excess of 2000m³ of petrol (2 million litres of petrol per
                     annum), which are close to a busy road with daily traffic flows of more than 30,000 vehicles, and
                     with relevant receptors within 10 metres of the pumps.


                     There are no petrol stations within the Darlington Council area that meet all of these criteria, and
                     no further action is required.


Major Fuel Storage   There are no major fuel storage depots handling petrol within the Darlington Council area.
Depots
(petroleum only)


Part A Processes     There is 1 part A industrial process fully within the Council area, another 2 part A processes
(Appendix 4)
                     straddle the northern border between Darlington and Sedgefield Council areas. A further 6 part
                     A processes are located on an industrial estate within the Sedgefield Council area, close to the
                     Darlington border. There are no recorded releases of benzene.


                     There are a number of large benzene emitters located in the Tees Valley Council areas of
                     Redcar & Cleveland and Stockton-on-Tees to the East. Their emissions are too far away, and on
                     an infrequent wind direction, to have any influence in the Darlington Council area.            This is
                     confirmed by monitoring results in the Middlesbrough Council area, as reported above.


Other Emitters       No other emission sources have been identified.




Conclusion           Benzene concentrations across the Darlington Council area are, and will continue to be, well
                     below the national air quality objectives. There is no need to proceed further.




                                                           30
                                          DARLINGTON BOROUGH COUNCIL


10. 1,3-BUTADIENE


Objective         Maximum 2.25 µg/m³ as a running annual mean by December 2003, with no exceedances




Overview          Road transport exhaust emissions are the most significant source of 1,3-butadiene within the
                  Darlington Council area, with no industrial emissions.


                  There is one significant part A industrial process which has 1,3-butadiene emissions located
                  within Redcar & Cleveland Council area, well to the East. This process is too far away, and on
                  an infrequent wind direction, to have any impact.




Year 2000 R & A   The first detailed Review and Assessment in 2000 concluded that there was no need to proceed
                  beyond the 1st stage review & assessment.




Year 2003 USR     The 2003 Updating and Screening report concluded that 1,3-butadiene concentrations across the
                  Darlington Council area continued to be well below the national air quality objective, with no need
                  to proceed further.


Monitoring Data   There is no continuous monitoring of 1,3-butadiene concentrations within the Darlington Council
(Reference 1)
                  area.


                  Diffusion tube monitoring of 1,3-butadiene is carried out within the Middlesbrough Council area to
                  the East, close to the main industrial emitter of 1,3-butadiene.
                  Annual means are now below 0.1 µg/m³, almost entirely due to industrial releases.
                  Concentrations continue to fall as a result of process improvements.


                  Levels of 1,3-butadiene concentrations within the Darlington Council area will be well below
                  those at Middlesbrough due to distance from the industrial source, and will meet the 1,3-
                  butadiene objectives.




Background        Nationally derived background concentrations of 1,3-butadiene as an annual mean for each
Concentrations    square kilometre grid across the Council area for 2001, and projections to 2003, are as follows,


                                                       2001                2003
                                                       Objective           2.25
                           maximum µg/m³               0.19                0.15
                           minimum µg/m³               0.08                0.06


                  These are well below the 1,3-butadiene objective.




                                                        31
                                        DARLINGTON BOROUGH COUNCIL


Road Traffic       Road traffic has been a significant source of 1.3-butadiene through petrol-vehicle exhausts, but
(Appendix 2)
                   the introduction of catalytic converters onto the exhaust systems of petrol-engined vehicles has
                   contributed to much lower emission levels. The relatively low levels of traffic flow within the
                   Darlington Council area, and absence of significant ‘canyon’ effect road locations, means that
                   road traffic emissions can be disregarded.




Other Transport    No significant sources.




Part B Processes   There are 28 Part B small industrial processes, 12 petrol stations and 6 small waste oil burners
(Appendix 3)
                   (<0.4MW) registered within the Council area, but there are no sources of 1,3-butadiene.




Part A Processes   There is one Part A industrial process fully within the Council area, another two Part A processes
(Appendix 4)
                   straddle the northern border between Darlington and Sedgefield Council areas. A further 6 Part
                   A processes are located on an industrial estate within the Sedgefield Council area, close to the
                   Darlington border. There are no recorded releases of 1,3-butadiene.


                   There is one large emitter of 1,3-butadiene located in the Tees Valley Council area of Redcar &
                   Cleveland to the East. The emissions are too far away, and on an infrequent wind direction, to
                   have any influence in the Darlington Council area. This is confirmed by monitoring results in the
                   Middlesbrough Council area, as reported above.




Other Emitters     No other emission sources have been identified.




Conclusion         1,3-Butadiene concentrations across the Darlington Council area are, and will continue to be,
                   well below the national air quality objective. There is no need to proceed further.




                                                         32
                                             DARLINGTON BOROUGH COUNCIL


11. LEAD


Objectives         1. Maximum 0.5 µg/m³ as an annual mean by December 2004, with no exceedances
                   2. Maximum 0.25 µg/m³ as an annual mean by December 2008, with no exceedances


Overview           Following the introduction of lead-free petrol in the early 1990’s, and subsequent ban on sales of
                   leaded petrol in the UK from January 1 2000, road traffic is no longer a significant source of lead
                   in the atmosphere.        Emissions of lead are now restricted to a variety of industrial activities,
                   including battery manufacture, pigments in paints and glazes, alloys, radiation shielding, tank
                   lining and piping.


                   There are no industrial processes within the Darlington Council area, or in neighbouring Council
                   areas, involved in lead processing.


Year 2000 R & A    The first detailed Review and Assessment concluded that there was no need to proceed beyond
                   the 1st stage review & assessment.


Year 2003 USR      The 2003 Updating and Screening report concluded that lead concentrations across the
                   Darlington Council area continued to be well below the national air quality objective, with no need
                   to proceed further.




Monitoring Data    Monitoring of lead is carried out at three locations within the neighbouring Stockton-on-Tees
(Reference 1)
                   Council area to the East as part of a heavy metal monitoring programme.
                   Concentrations are consistently below the limit of detection of 0.01 µg/m³.

                   Annual mean lead-in-air concentrations are also measured at urban background national network
                   site in Leeds.
                   In 2004, the last available year for results, concentrations had fallen to 0.01 µg/m³.

                   Levels of lead-in-air concentrations within the Darlington Council area are expected to be below
                   the limit of detection.


Background         There are no Nationally derived background concentrations of lead-in-air.
Concentrations



Road Traffic       Road traffic is no longer a significant source of lead-in-air.




Other Transport    No significant sources.




Part B Processes   There are 28 Part B small industrial processes, 12 petrol stations and 6 small waste oil burners
(Appendix 3)
                   (<0.4MW) registered within the Council area, but there are no sources of lead.




                                                            33
                                         DARLINGTON BOROUGH COUNCIL


Part A Processes   There is one Part A industrial process fully within the Council area, another two Part A processes
(Appendix 4)
                   straddle the northern border between Darlington and Sedgefield Council areas. A further 6 Part
                   A processes are located on an industrial estate within the Sedgefield Council area, close to the
                   Darlington border. There are no recorded emissions of lead.


                   There are no lead-related industrial processes in other Tees Valley or neighbouring Council
                   areas.




Other Emitters     No other emission sources have been identified.




Conclusion         Lead-in-air concentrations across the Darlington Council area are, and will continue to be, well
                   below the national air quality objectives. There is no need to proceed further.




                                                         34
                                            DARLINGTON BOROUGH COUNCIL


12. Conclusions

       11.1       Road traffic remains the major source of air pollution within the Darlington Council, and has
                  significant impact on nitrogen dioxide and particulate PM10 concentrations at ground level.


       11.2       All thirteen current air quality objectives, covering seven pollutants, will be met within the Darlington
                  Council area by their due dates.        There continues to be no need to declare any Air Quality
                  Management Areas.


       11.3       The objectives of most concern are the annual mean for nitrogen dioxide, and the 24-hour objective
                  for particulate PM10. The main source of these pollutants within the Council area is traffic, although
                  there is a wide range of other particulate PM10 sources that may have some impact from time to
                  time.


       11.4       The two proposed objectives for particulate PM10 in 2010 are less likely to be met, based on current
                  continuous monitoring of concentrations within the Darlington Council area, and across the Tees
                  Valley area, without significant reductions in source emission.




13. Further Work

Sources of particulate PM10 are the most diverse of all the pollutants under consideration.             Further analysis of
particulate PM10 episodes will be required if the proposed objectives for 2010 become regulated.


Although there are no Air Quality Management Areas required within the Darlington Council area, consideration will be
given to an Action Plan to further improve air quality.


The Government was due to review the UK National Air Quality Strategy during Q4 2005, but this has been delayed.
The strategy review will have an important bearing on the future direction of air quality investigation, and a programme
of further work will be drawn up once the strategy review has been published.




14. Consultation

External                                                         Internal

Secretary of State                                               Tees Valley Environmental Protection Group

Environment Agency                                               Corporate Policy and Resources

Highways Authority – operations department                       Transport Planning / Tees Valley JSU

NHS                                                              Land Use Planning

Air Quality Forum - industry and environmental groups            Local Agenda 21 and Energy management



This report will be placed on the Darlington Council web-site, and copies placed in the main reference library.




                                                            35
                                                           DARLINGTON BOROUGH COUNCIL


                                                                    APPENDIX 1a
                                                              Background Concentrations


Darlington Background Concentrations - NOx / NO2 for 2004 / 2005 / 2010                  Grid Ref 419500 - 427500                    Page 1 of 3

         X           Y     NOx 2004                  NOx 2005               NOx 2010             NO2 2004            NO2 2005      NO2 2010
                         ug/m3 as NO2              ug/m3 as NO2           ug/m3 as NO2             ug/m3               ug/m3         ug/m3
                          annual mean               annual mean            annual mean          annual mean         annual mean   annual mean
   419500      515500         9.9                       9.6                    7.9                   7.8                 7.5          6.2
   419500      516500         9.9                       9.6                    8.0                   7.8                 7.5          6.2
   419500      517500        10.0                       9.6                    8.0                   7.8                 7.6          6.3
   419500      518500         9.6                       9.3                    7.8                   7.6                 7.3          6.1
   419500      519500         9.8                       9.5                    7.9                   7.7                 7.4          6.2
   419500      520500         9.9                       9.5                    7.9                   7.7                 7.5          6.2
   420500      515500        10.6                      10.2                    8.4                   8.3                 8.0          6.6
   420500      516500        10.5                      10.2                    8.4                   8.3                 8.0          6.6
   420500      517500        10.4                      10.1                    8.4                   8.2                 7.9          6.6
   420500      518500        10.2                       9.9                    8.2                   8.0                 7.7          6.4
   420500      519500        10.3                       9.9                    8.3                   8.0                 7.8          6.5
   420500      520500        10.2                       9.9                    8.2                   8.0                 7.7          6.4
   421500      515500        12.0                      11.6                    9.7                   9.4                 9.1          7.6
   421500      516500        10.9                      10.6                    8.7                   8.6                 8.3          6.8
   421500      517500        10.7                      10.3                    8.6                   8.4                 8.1          6.7
   421500      518500        10.5                      10.2                    8.5                   8.2                 8.0          6.6
   421500      519500        10.5                      10.2                    8.5                   8.3                 8.0          6.6
   421500      520500        10.5                      10.1                    8.4                   8.2                 7.9          6.6
   421500      521500        10.9                      10.5                    8.7                   8.5                 8.3          6.8
   421500      522500        11.3                      11.0                    9.0                   8.9                 8.6          7.1
   421500      523500        11.6                      11.2                    9.2                   9.1                 8.8          7.2
   421500      524500        12.7                      12.3                   10.1                   9.9                 9.6          7.9
   422500      514500        12.4                      12.0                   10.0                   9.7                 9.4          7.8
   422500      515500        12.2                      11.8                    9.8                   9.5                 9.2          7.7
   422500      516500        11.1                      10.7                    8.8                   8.7                 8.4          6.9
   422500      517500        10.8                      10.4                    8.6                   8.5                 8.2          6.8
   422500      518500        10.8                      10.4                    8.6                   8.4                 8.2          6.8
   422500      519500        10.9                      10.5                    8.7                   8.5                 8.2          6.8
   422500      520500        10.9                      10.6                    8.7                   8.6                 8.3          6.8
   422500      521500        11.5                      11.1                    9.1                   9.0                 8.7          7.1
   422500      522500        11.9                      11.5                    9.5                   9.4                 9.0          7.4
   422500      523500        12.1                      11.8                    9.7                   9.5                 9.2          7.6
   422500      524500        14.1                      13.8                   11.3                  11.0                10.8          8.9
   423500      513500        18.6                      17.7                   13.9                  15.6                15.3          10.9
   423500      514500        16.7                      16.0                   12.7                  13.1                12.5          10.0
   423500      515500        14.6                      14.0                   11.4                  11.5                11.0          8.9
   423500      516500        11.5                      11.1                    9.1                   9.0                 8.7          7.1
   423500      517500        11.2                      10.8                    8.9                   8.8                 8.5          7.0
   423500      518500        11.2                      10.8                    9.0                   8.8                 8.5          7.0
   423500      519500        11.5                      11.1                    9.2                   9.0                 8.7          7.2
   423500      520500        11.7                      11.3                    9.3                   9.1                 8.9          7.3
   423500      521500        12.4                      12.0                    9.9                   9.8                 9.4          7.8
   423500      522500        12.8                      12.4                   10.2                  10.1                 9.7          8.0
   423500      523500        13.0                      12.6                   10.4                  10.2                 9.8          8.1
   423500      524500        14.3                      14.0                   11.5                  11.2                11.0          9.1
   424500      513500        19.3                      18.4                   14.3                  16.0                15.6          11.2
   424500      514500        18.7                      17.8                   13.9                  15.7                15.3          10.9
   424500      515500        18.4                      17.5                   13.6                  15.6                15.2          10.7
   424500      516500        16.6                      15.9                   12.5                  13.0                12.4          9.8
   424500      517500        14.5                      13.9                   11.2                  11.4                10.9          8.7
   424500      518500        12.8                      12.4                   10.1                  10.1                 9.7          7.9
   424500      519500        12.8                      12.3                   10.1                  10.0                 9.7          7.9
   424500      520500        13.1                      12.7                   10.3                  10.3                 9.9          8.1
   424500      521500        13.6                      13.2                   10.8                  10.7                10.3          8.5
   424500      522500        13.8                      13.3                   10.9                  10.8                10.4          8.6
   424500      523500        13.7                      13.3                   10.9                  10.8                10.4          8.6
   424500      524500        14.3                      13.9                   11.4                  11.2                10.9          9.0
   425500      513500        21.8                      20.7                   16.0                  17.1                16.7          12.6
   425500      514500        21.4                      20.3                   15.9                  16.9                16.5          12.4
   425500      515500        21.1                      20.1                   15.7                  16.8                16.4          12.3
   425500      516500        20.4                      19.4                   15.2                  16.5                16.1          11.9
   425500      517500        19.8                      18.8                   14.7                  16.2                15.8          11.5
   425500      518500        17.8                      17.0                   13.4                  15.3                13.3          10.5
   425500      519500        16.2                      15.6                   12.5                  12.7                12.2          9.8
   425500      520500        14.0                      13.5                   11.1                  10.9                10.6          8.7
   425500      521500        14.7                      14.2                   11.7                  11.5                11.1          9.2
   425500      522500        18.0                      17.6                   15.0                  15.4                15.2          11.8
   426500      512500        17.1                      16.4                   13.1                  13.4                12.8          10.2
   426500      513500        19.0                      18.1                   14.5                  15.8                15.5          11.3




                                                                              36
                                                         DARLINGTON BOROUGH COUNCIL


                                                                  APPENDIX 1a
                                                            Background Concentrations


Darlington Background Concentrations - Nox / NO2 for 2004 / 2005 / 2010                  Grid Ref 428500 - 433500                    Page 2 of 3

         X           Y     NOx 2004                  NOx 2005               NOx 2010             NO2 2004            NO2 2005      NO2 2010
                         ug/m3 as NO2              ug/m3 as NO2           ug/m3 as NO2             ug/m3               ug/m3         ug/m3
                          annual mean               annual mean            annual mean          annual mean         annual mean   annual mean
   428500      510500        14.2                      13.7                   11.2                  11.1                10.7          8.8
   428500      511500        16.8                      16.1                   13.0                  13.1                12.6          10.2
   428500      512500        19.9                      19.1                   15.3                  16.3                15.9          12.0
   428500      513500        26.7                      25.8                   20.8                  19.4                19.0          17.0
   428500      514500        30.0                      29.1                   23.7                  20.9                20.5          18.3
   428500      515500        31.4                      30.7                   25.2                  21.5                21.3          19.0
   428500      516500        26.7                      25.9                   21.2                  19.4                19.1          17.1
   428500      517500        21.7                      21.1                   17.2                  17.1                16.8          13.5
   428500      518500        19.9                      19.1                   15.2                  16.2                15.9          11.9
   428500      519500        20.7                      19.8                   15.6                  16.6                16.2          12.3
   428500      520500        22.8                      21.8                   17.0                  17.6                17.2          13.3
   428500      521500        24.6                      23.8                   18.7                  18.4                18.1          16.0
   429500      508500        12.9                      12.4                   10.1                  10.1                9.7           7.9
   429500      509500        13.4                      12.9                   10.6                  10.5                10.1          8.3
   429500      510500        13.9                      13.5                   11.1                  10.9                10.6          8.7
   429500      511500        16.3                      15.7                   12.8                  12.8                12.3          10.0
   429500      512500        19.7                      18.9                   15.3                  16.2                15.8          12.0
   429500      513500        26.7                      25.8                   21.0                  19.4                19.0          17.0
   429500      514500        29.8                      28.8                   23.6                  20.8                20.4          18.3
   429500      515500        30.7                      29.8                   24.5                  21.2                20.9          18.7
   429500      516500        26.1                      25.3                   20.6                  19.1                18.8          16.9
   429500      517500        21.7                      20.9                   17.0                  17.1                16.8          13.3
   429500      518500        18.0                      17.3                   14.0                  15.4                15.1          11.0
   429500      519500        17.8                      17.2                   13.8                  15.3                13.5          10.8
   429500      520500        19.8                      19.0                   15.0                  16.2                15.9          11.8
   429500      521500        22.0                      21.1                   16.5                  17.2                16.8          12.9
   430500      508500        13.2                      12.7                   10.5                  10.4                10.0          8.2
   430500      510500        14.3                      13.9                   11.5                  11.2                10.9          9.0
   430500      511500        16.5                      15.9                   13.0                  12.9                12.5          10.2
   430500      512500        20.3                      19.7                   16.1                  16.5                16.2          12.6
   430500      513500        26.0                      25.6                   21.0                  19.1                19.0          17.1
   430500      514500        27.6                      27.3                   22.5                  19.8                19.7          17.8
   430500      515500        27.9                      27.4                   22.3                  20.0                19.8          17.7
   430500      516500        24.4                      23.5                   19.0                  18.3                18.0          16.1
   430500      517500        21.7                      20.8                   16.7                  17.1                16.7          13.1
   430500      518500        18.2                      17.5                   14.1                  15.4                15.2          11.0
   430500      519500        16.4                      15.8                   12.8                  12.9                12.4          10.1
   430500      520500        16.5                      15.9                   12.8                  12.9                12.4          10.1
   430500      521500        17.9                      17.2                   13.8                  15.3                15.1          10.8
   430500      522500        20.3                      19.5                   15.5                  16.4                16.1          12.2
   431500      509500        13.6                      13.1                   10.8                  10.6                10.3          8.5
   431500      510500        14.1                      13.7                   11.3                  11.0                10.7          8.9
   431500      511500        15.7                      15.2                   12.4                  12.3                11.9          9.8
   431500      512500        19.6                      19.3                   15.8                  16.1                16.0          12.4
   431500      513500        23.5                      23.3                   19.1                  17.9                17.9          16.1
   431500      514500        24.6                      24.4                   20.0                  18.4                18.4          16.6
   431500      515500        24.3                      23.7                   19.2                  18.3                18.1          16.2
   431500      516500        21.1                      20.3                   16.3                  16.8                16.5          12.8
   431500      517500        18.7                      18.0                   14.5                  15.7                15.4          11.4
   431500      518500        15.1                      14.6                   11.9                  11.8                11.4          9.4
   431500      519500        14.7                      14.2                   11.6                  11.5                11.1          9.1
   431500      520500        14.7                      14.2                   11.6                  11.5                11.1          9.1
   431500      521500        14.8                      14.3                   11.7                  11.6                11.2          9.2
   431500      522500        16.3                      15.8                   12.8                  12.8                12.4          10.1
   432500      509500        13.5                      13.1                   10.8                  10.6                10.3          8.5
   432500      510500        13.9                      13.6                   11.2                  10.9                10.6          8.8
   432500      511500        14.9                      14.4                   11.9                  11.7                11.3          9.3
   432500      512500        17.8                      17.6                   14.5                  15.3                15.2          11.4
   432500      513500        21.0                      20.9                   17.2                  16.8                16.8          15.2
   432500      514500        21.7                      21.7                   17.8                  17.1                17.1          15.5
   432500      515500        21.9                      21.4                   17.2                  17.2                17.0          15.3
   432500      516500        19.2                      18.5                   14.8                  15.9                15.6          11.6
   432500      517500        17.8                      17.2                   13.8                  15.3                13.5          10.8
   432500      518500        14.6                      14.1                   11.6                  11.4                11.1          9.1
   432500      519500        14.3                      13.8                   11.3                  11.2                10.8          8.9
   432500      520500        14.2                      13.8                   11.2                  11.2                10.8          8.8
   432500      521500        14.3                      13.8                   11.3                  11.2                10.8          8.8
   432500      522500        14.5                      14.1                   11.5                  11.4                11.0          9.0
   433500      509500        13.5                      13.1                   10.8                  10.6                10.3          8.5




                                                                           37
                                                          DARLINGTON BOROUGH COUNCIL


                                                                   APPENDIX 1a
                                                             Background Concentrations


Darlington Background Concentrations - Nox / NO2 for 2004 / 2005 / 2010                  Grid Ref 434500 - 437500                    Page 3 of 3

         X           Y     NOx 2004                  NOx 2005               NOx 2010             NO2 2004            NO2 2005      NO2 2010
                         ug/m3 as NO2              ug/m3 as NO2           ug/m3 as NO2             ug/m3               ug/m3         ug/m3
                          annual mean               annual mean            annual mean          annual mean         annual mean   annual mean
   434500      506500        12.8                      12.3                   10.2                  10.0                 9.7           8.0
   434500      507500        12.8                      12.4                   10.3                  10.1                 9.7           8.1
   434500      508500        13.1                      12.6                   10.5                  10.2                 9.9           8.2
   434500      509500        13.5                      13.1                   10.8                  10.6                10.2           8.5
   434500      510500        13.6                      13.2                   11.0                  10.7                10.4           8.6
   434500      512500        15.1                      14.6                   12.1                  11.8                11.5           9.5
   434500      513500        15.8                      15.4                   12.7                  12.4                12.1          10.0
   434500      514500        15.9                      15.4                   12.8                  12.4                12.1          10.0
   434500      515500        17.7                      17.1                   13.7                  15.2                13.4          10.7
   434500      516500        17.1                      16.4                   13.2                  13.4                12.9          10.3
   434500      517500        16.9                      16.2                   13.1                  13.2                12.7          10.2
   434500      518500        14.0                      13.5                   11.1                  10.9                10.6           8.7
   434500      519500        13.9                      13.5                   11.1                  10.9                10.5           8.7
   434500      520500        13.8                      13.4                   11.0                  10.8                10.5           8.6
   434500      521500        13.7                      13.3                   10.9                  10.7                10.4           8.5
   434500      522500        13.9                      13.4                   11.0                  10.9                10.5           8.6
   435500      511500        14.6                      14.2                   11.9                  11.4                11.1           9.3
   435500      512500        15.9                      15.5                   12.8                  12.4                12.1          10.1
   435500      513500        16.4                      16.0                   13.2                  12.8                12.5          10.4
   435500      514500        16.3                      15.9                   13.2                  12.8                12.5          10.3
   435500      515500        18.1                      17.4                   14.0                  15.4                15.1          11.0
   435500      516500        17.6                      16.9                   13.6                  15.2                13.2          10.7
   435500      517500        17.4                      16.8                   13.5                  15.1                13.1          10.6
   435500      518500        14.5                      14.0                   11.6                  11.4                11.0           9.1
   435500      519500        14.4                      13.9                   11.5                  11.3                10.9           9.0
   435500      520500        14.3                      13.9                   11.4                  11.2                10.9           9.0
   435500      521500        14.2                      13.8                   11.3                  11.1                10.8           8.9
   435500      522500        14.3                      13.8                   11.4                  11.2                10.8           8.9
   436500      510500        14.4                      14.0                   11.7                  11.3                11.0           9.2
   436500      511500        14.8                      14.4                   12.1                  11.6                11.3           9.5
   436500      512500        16.0                      15.6                   13.0                  12.6                12.2          10.2
   436500      513500        16.3                      15.8                   13.2                  12.7                12.4          10.3
   436500      514500        16.1                      15.7                   13.0                  12.6                12.3          10.2
   436500      516500        17.8                      17.1                   13.8                  15.3                13.4          10.8
   436500      518500        14.6                      14.1                   11.7                  11.4                11.1           9.2
   436500      519500        14.6                      14.1                   11.7                  11.4                11.1           9.1
   436500      520500        14.5                      14.0                   11.6                  11.3                11.0           9.1
   436500      521500        14.3                      13.8                   11.5                  11.2                10.8           9.0
   436500      522500        15.1                      14.8                   12.3                  11.9                11.6           9.6
   437500      513500        16.4                      15.9                   13.3                  12.8                12.5          10.4
   437500      514500        16.2                      15.7                   13.1                  12.7                12.3          10.3
   437500      519500        14.8                      14.3                   11.8                  11.6                11.2           9.3
   437500      520500        14.7                      14.2                   11.7                  11.5                11.1           9.2
   437500      521500        14.4                      14.0                   11.6                  11.3                10.9           9.1
   437500      522500        15.2                      14.8                   12.3                  11.9                11.6           9.7
   437500      523500        15.2                      14.8                   12.3                  11.9                11.6           9.7

             max               31.4                     30.7                  25.2                  21.5               21.3          19.0
             min               9.6                       9.3                   7.8                   7.6                7.3           6.1




                                                                             38
                                                         DARLINGTON BOROUGH COUNCIL


                                                                 APPENDIX 1b
                                                           Background Concentrations

Darlington Background Concentrations - PM10 for 2004 / 2005 / 2010   Grid Ref 419500 - 427500                 Page 1 of 3
                                                                                                 secondary
         X           Y     PM10 2004                PM10 2005           PM10 2010                PM10 2004
                            ug/m3 (g)                ug/m3 (g)           ug/m3 (g)                ug/m3 (g)
                          annual mean              annual mean         annual mean              annual mean
   419500      515500         14.6                     14.5                13.6                     6.10
   419500      516500         14.5                     14.4                13.4                     6.10
   419500      517500         14.5                     14.4                13.4                     6.10
   419500      518500         14.4                     14.3                13.4                     6.10
   419500      519500         14.6                     14.5                13.5                     6.10
   419500      520500         14.2                     14.1                13.2                     5.82
   420500      515500         14.8                     14.7                13.7                     6.44
   420500      516500         14.7                     14.6                13.7                     6.44
   420500      517500         14.7                     14.6                13.6                     6.44
   420500      518500         14.7                     14.6                13.6                     6.44
   420500      519500         14.8                     14.7                13.7                     6.44
   420500      520500         14.6                     14.6                13.6                     6.23
   421500      515500         15.3                     15.2                14.2                     6.44
   421500      516500         14.8                     14.7                13.7                     6.44
   421500      517500         14.8                     14.7                13.7                     6.44
   421500      518500         14.8                     14.7                13.7                     6.44
   421500      519500         14.9                     14.8                13.8                     6.44
   421500      520500         14.7                     14.6                13.7                     6.23
   421500      521500         14.8                     14.7                13.8                     6.23
   421500      522500         16.1                     16.2                15.0                     6.23
   421500      523500         16.3                     16.4                15.2                     6.23
   421500      524500         16.7                     16.8                15.5                     6.23
   422500      514500         15.2                     15.1                14.1                     6.44
   422500      515500         15.2                     15.1                14.1                     6.44
   422500      516500         14.8                     14.7                13.7                     6.44
   422500      517500         14.7                     14.6                13.6                     6.44
   422500      518500         14.7                     14.6                13.7                     6.44
   422500      519500         14.8                     14.7                13.7                     6.44
   422500      520500         14.7                     14.6                13.6                     6.23
   422500      521500         14.8                     14.8                13.8                     6.23
   422500      522500         15.2                     15.1                14.1                     6.23
   422500      523500         15.5                     15.5                14.4                     6.23
   422500      524500         16.5                     16.5                15.4                     6.23
   423500      513500         16.0                     15.9                14.8                     6.44
   423500      514500         15.7                     15.6                14.5                     6.44
   423500      515500         15.6                     15.5                14.4                     6.44
   423500      516500         14.9                     14.8                13.8                     6.44
   423500      517500         14.8                     14.7                13.7                     6.44
   423500      518500         14.8                     14.7                13.7                     6.44
   423500      519500         14.9                     14.8                13.8                     6.44
   423500      520500         14.8                     14.7                13.7                     6.23
   423500      521500         15.0                     14.9                13.9                     6.23
   423500      522500         15.3                     15.3                14.2                     6.23
   423500      523500         15.7                     15.7                14.6                     6.23
   423500      524500         19.3                     19.3                18.2                     6.23
   424500      513500         16.3                     16.2                15.0                     6.44
   424500      514500         16.1                     16.0                14.8                     6.44
   424500      515500         15.9                     15.7                14.6                     6.44
   424500      516500         15.6                     15.4                14.3                     6.44
   424500      517500         15.3                     15.2                14.1                     6.44
   424500      518500         15.1                     15.0                13.9                     6.44
   424500      519500         15.2                     15.1                14.1                     6.44
   424500      520500         15.1                     15.0                14.0                     6.23
   424500      521500         15.2                     15.2                14.1                     6.23
   424500      522500         15.5                     15.4                14.4                     6.23
   424500      523500         15.7                     15.6                14.6                     6.23
   424500      524500         16.6                     16.6                15.6                     6.23
   425500      513500         16.7                     16.6                15.3                     6.44
   425500      514500         16.6                     16.5                15.3                     6.44
   425500      515500         16.3                     16.2                15.0                     6.44
   425500      516500         16.1                     16.0                14.8                     6.44
   425500      517500         16.0                     15.8                14.7                     6.44
   425500      518500         15.7                     15.6                14.4                     6.44
   425500      519500         15.5                     15.4                14.3                     6.44
   425500      520500         15.0                     15.0                14.0                     6.23
   425500      521500         15.3                     15.2                14.2                     6.23
   425500      522500         15.6                     15.6                14.5                     6.23
   426500      512500         16.0                     15.9                14.7                     6.44
   426500      513500         16.4                     16.3                15.1                     6.44




                                                                          39
                                                          DARLINGTON BOROUGH COUNCIL


                                                                  APPENDIX 1b
                                                            Background Concentrations

Darlington Background Concentrations - PM10 for 2004 / 2005 / 2010   Grid Ref 428500 - 433500                 Page 2 of 3
                                                                                                 secondary
         X           Y     PM10 2004                PM10 2005           PM10 2010                PM10 2004
                            ug/m3 (g)                ug/m3 (g)           ug/m3 (g)                ug/m3 (g)
                          annual mean              annual mean         annual mean              annual mean
   428500      510500         15.0                     14.9                13.9                     6.44
   428500      511500         15.5                     15.4                14.3                     6.44
   428500      512500         16.1                     16.0                14.9                     6.44
   428500      513500         17.5                     17.3                16.0                     6.44
   428500      514500         18.1                     18.0                16.6                     6.44
   428500      515500         18.7                     18.7                17.3                     6.44
   428500      516500         17.9                     17.8                16.6                     6.44
   428500      517500         17.0                     17.0                15.8                     6.44
   428500      518500         16.2                     16.1                15.0                     6.44
   428500      519500         16.3                     16.2                15.0                     6.44
   428500      520500         16.5                     16.4                15.2                     6.23
   428500      521500         17.4                     17.4                16.2                     6.23
   429500      508500         14.8                     14.7                13.7                     6.45
   429500      509500         14.9                     14.8                13.8                     6.45
   429500      510500         15.1                     14.9                13.9                     6.44
   429500      511500         15.5                     15.4                14.3                     6.44
   429500      512500         16.1                     16.0                14.8                     6.44
   429500      513500         17.4                     17.3                16.0                     6.44
   429500      514500         18.0                     17.9                16.5                     6.44
   429500      515500         18.4                     18.4                17.0                     6.44
   429500      516500         17.6                     17.6                16.4                     6.44
   429500      517500         16.9                     16.8                15.7                     6.44
   429500      518500         15.9                     15.8                14.7                     6.44
   429500      519500         15.9                     15.8                14.7                     6.44
   429500      520500         16.0                     15.9                14.8                     6.23
   429500      521500         16.6                     16.5                15.3                     6.23
   430500      508500         14.8                     14.7                13.7                     6.45
   430500      510500         15.1                     15.0                14.0                     6.45
   430500      511500         15.5                     15.4                14.3                     6.45
   430500      512500         16.1                     16.0                14.9                     6.45
   430500      513500         18.0                     18.0                16.7                     6.45
   430500      514500         18.3                     18.4                17.1                     6.45
   430500      515500         18.4                     18.4                17.2                     6.45
   430500      516500         17.0                     17.0                15.8                     6.45
   430500      517500         16.5                     16.4                15.2                     6.45
   430500      518500         15.8                     15.7                14.6                     6.45
   430500      519500         15.5                     15.4                14.4                     6.45
   430500      520500         15.4                     15.3                14.3                     6.24
   430500      521500         15.7                     15.6                14.5                     6.24
   430500      522500         16.2                     16.1                15.0                     6.24
   431500      509500         14.9                     14.8                13.7                     6.45
   431500      510500         15.1                     15.0                14.0                     6.45
   431500      511500         15.3                     15.2                14.2                     6.45
   431500      512500         16.1                     16.1                14.9                     6.45
   431500      513500         17.6                     17.6                16.4                     6.45
   431500      514500         17.8                     17.8                16.6                     6.45
   431500      515500         17.7                     17.7                16.5                     6.45
   431500      516500         16.4                     16.3                15.2                     6.45
   431500      517500         16.0                     15.9                14.8                     6.45
   431500      518500         15.3                     15.3                14.2                     6.45
   431500      519500         15.3                     15.2                14.2                     6.45
   431500      520500         15.1                     15.1                14.1                     6.24
   431500      521500         15.4                     15.4                14.4                     6.24
   431500      522500         15.8                     15.8                14.7                     6.24
   432500      509500         14.8                     14.7                13.7                     6.45
   432500      510500         15.0                     14.9                13.9                     6.45
   432500      511500         15.1                     15.0                13.9                     6.45
   432500      512500         15.7                     15.7                14.5                     6.45
   432500      513500         17.1                     17.1                15.9                     6.45
   432500      514500         17.2                     17.3                16.0                     6.45
   432500      515500         17.2                     17.2                16.0                     6.45
   432500      516500         16.0                     15.9                14.8                     6.45
   432500      517500         15.8                     15.7                14.6                     6.45
   432500      518500         15.2                     15.1                14.1                     6.45
   432500      519500         15.1                     15.0                14.0                     6.45
   432500      520500         14.9                     14.8                13.9                     6.24
   432500      521500         15.2                     15.1                14.1                     6.24
   432500      522500         15.4                     15.3                14.3                     6.24
   433500      509500         15.1                     15.0                14.0                     6.45




                                                                          40
                                                        DARLINGTON BOROUGH COUNCIL


                                                                 APPENDIX 1b
                                                           Background Concentrations


Darlington Background Concentrations - PM10 for 2004 / 2005 / 2010   Grid Ref 434500 - 437500                 Page 3 of 3
                                                                                                 secondary
         X           Y     PM10 2004                PM10 2005           PM10 2010                PM10 2004
                            ug/m3 (g)                ug/m3 (g)           ug/m3 (g)                ug/m3 (g)
                          annual mean              annual mean         annual mean              annual mean
   434500      506500         14.8                     14.6                13.7                     6.45
   434500      507500         14.6                     14.5                13.5                     6.45
   434500      508500         14.7                     14.5                13.6                     6.45
   434500      509500         15.1                     15.0                14.0                     6.45
   434500      510500         15.2                     15.1                14.1                     6.45
   434500      512500         15.2                     15.1                14.0                     6.45
   434500      513500         15.4                     15.3                14.3                     6.45
   434500      514500         15.4                     15.3                14.3                     6.45
   434500      515500         15.7                     15.6                14.5                     6.45
   434500      516500         15.5                     15.4                14.3                     6.45
   434500      517500         15.5                     15.4                14.3                     6.45
   434500      518500         15.0                     14.9                13.9                     6.45
   434500      519500         15.0                     14.9                13.9                     6.45
   434500      520500         14.9                     14.8                13.8                     6.24
   434500      521500         14.9                     14.8                13.8                     6.24
   434500      522500         15.0                     14.9                13.9                     6.24
   435500      511500         15.2                     15.1                14.1                     6.45
   435500      512500         15.3                     15.1                14.1                     6.45
   435500      513500         15.4                     15.3                14.3                     6.45
   435500      514500         15.4                     15.3                14.3                     6.45
   435500      515500         15.6                     15.5                14.4                     6.45
   435500      516500         15.5                     15.3                14.2                     6.45
   435500      517500         15.5                     15.4                14.3                     6.45
   435500      518500         15.1                     15.0                14.0                     6.45
   435500      519500         15.1                     15.0                14.0                     6.45
   435500      520500         15.0                     14.9                13.9                     6.24
   435500      521500         14.8                     14.7                13.8                     6.24
   435500      522500         14.9                     14.8                13.8                     6.24
   436500      510500         14.8                     14.6                13.7                     6.45
   436500      511500         14.8                     14.7                13.7                     6.45
   436500      512500         15.1                     15.0                13.9                     6.45
   436500      513500         15.2                     15.0                14.0                     6.45
   436500      514500         15.2                     15.0                14.0                     6.45
   436500      516500         15.4                     15.3                14.2                     6.45
   436500      518500         15.1                     15.0                14.0                     6.45
   436500      519500         15.1                     15.0                14.0                     6.45
   436500      520500         14.9                     14.8                13.8                     6.24
   436500      521500         14.7                     14.6                13.7                     6.24
   436500      522500         15.1                     15.0                14.0                     6.24
   437500      513500         15.1                     15.0                14.0                     6.45
   437500      514500         15.1                     15.0                14.0                     6.45
   437500      519500         15.1                     15.0                14.0                     6.45
   437500      520500         14.9                     14.8                13.9                     6.24
   437500      521500         14.8                     14.7                13.7                     6.24
   437500      522500         15.1                     15.0                14.1                     6.24
   437500      523500         15.1                     15.1                14.1                     6.24

             max              19.3                     19.3                18.2                     6.5
             min              14.2                     14.1                13.2                     5.8




                                                                         41
                                                                 DARLINGTON BOROUGH COUNCIL


                                                                          APPENDIX 1c
                                                                    Background Concentrations


Darlington Background Concentrations - SO2 for 2001; CO for 2001; Benzene for 2001 / 2003 / 2010; 1,3-Butadiene for 2001 / 2003 - 419500 to 427500                            Page 1 of 3


                         SO2 2001                 CO 2001              Benzene 2001             Benzene 2003           Benzene 2010          1,3-Butadiene 2001   1,3-Butadiene 2003
                        annual mean             annual mean             annual mean             annual mean            annual mean             annual mean          annual mean
X         Y            ppb      µg/m³          ppm      mg/m³          ppb      µg/m³          ppb      µg/m³         ppb       µg/m³         ppb       µg/m³      ppb       µg/m³


419500    518500       0.73      1.94         0.161     0.187         0.054     0.177          0.056    0.183         0.047     0.154        0.034      0.077     0.029      0.065
419500    519500       0.73      1.93         0.160     0.186         0.054     0.177          0.056    0.182         0.047     0.154        0.033      0.075     0.028      0.064
419500    520500       0.72      1.91         0.161     0.187         0.054     0.175          0.056    0.182         0.047     0.153        0.034      0.076     0.029      0.065
420500    515500       0.76      2.02         0.160     0.186         0.052     0.169          0.052    0.170         0.044     0.142        0.034      0.076     0.028      0.064
420500    516500       0.73      1.95         0.161     0.187         0.053     0.171          0.054    0.175         0.045     0.146        0.034      0.077     0.029      0.065
420500    517500       0.73      1.93         0.162     0.188         0.054     0.176          0.055    0.179         0.046     0.150        0.035      0.078     0.029      0.065
420500    518500       0.73      1.93         0.162     0.188         0.057     0.186          0.059    0.191         0.050     0.161        0.035      0.078     0.029      0.066
420500    519500       0.73      1.94         0.162     0.188         0.058     0.187          0.059    0.192         0.050     0.162        0.034      0.077     0.029      0.065
420500    520500       0.72      1.92         0.162     0.188         0.058     0.188          0.059    0.193         0.050     0.163        0.035      0.078     0.029      0.066
421500    516500       0.73      1.94         0.164     0.190         0.054     0.174          0.055    0.178         0.045     0.147        0.036      0.080     0.030      0.067
421500    517500       0.73      1.93         0.165     0.191         0.055     0.178          0.056    0.182         0.046     0.151        0.036      0.081     0.030      0.068
421500    518500       0.72      1.92         0.165     0.191         0.058     0.189          0.060    0.195         0.050     0.164        0.036      0.081     0.030      0.069
421500    519500       0.73      1.93         0.165     0.191         0.059     0.191          0.061    0.197         0.051     0.166        0.036      0.081     0.030      0.068
421500    520500       0.72      1.91         0.166     0.192         0.060     0.194          0.062    0.200         0.052     0.168        0.036      0.082     0.031      0.069
421500    521500       0.71      1.90         0.167     0.194         0.062     0.202          0.065    0.210         0.054     0.176        0.038      0.085     0.032      0.071
421500    522500       0.70      1.85         0.170     0.197         0.065     0.211          0.068    0.220         0.057     0.185        0.039      0.087     0.032      0.073
421500    523500       0.70      1.86         0.174     0.202         0.094     0.307          0.095    0.309         0.083     0.271        0.041      0.093     0.035      0.078
421500    524500       0.73      1.93         0.180     0.209         0.103     0.335          0.104    0.338         0.091     0.297        0.044      0.099     0.037      0.083
422500    514500       0.75      2.00         0.170     0.197         0.056     0.183          0.056    0.183         0.046     0.150        0.041      0.091     0.034      0.076
422500    515500       0.74      1.98         0.168     0.195         0.055     0.180          0.056    0.181         0.046     0.149        0.039      0.088     0.032      0.073
422500    516500       0.73      1.93         0.168     0.195         0.055     0.180          0.057    0.184         0.047     0.152        0.038      0.087     0.032      0.072
422500    517500       0.73      1.93         0.167     0.194         0.056     0.182          0.057    0.186         0.047     0.154        0.037      0.084     0.031      0.071
422500    518500       0.73      1.93         0.167     0.194         0.059     0.193          0.061    0.199         0.051     0.166        0.038      0.085     0.032      0.071
422500    519500       0.72      1.92         0.167     0.194         0.060     0.195          0.062    0.201         0.052     0.168        0.038      0.085     0.032      0.071
422500    520500       0.72      1.92         0.169     0.196         0.062     0.201          0.064    0.207         0.053     0.173        0.039      0.087     0.032      0.073
422500    521500       0.73      1.93         0.172     0.199         0.064     0.208          0.066    0.216         0.055     0.180        0.040      0.090     0.033      0.075
422500    522500       0.70      1.86         0.173     0.201         0.067     0.217          0.069    0.225         0.058     0.188        0.041      0.092     0.034      0.077
422500    523500       0.71      1.88         0.178     0.206         0.096     0.313          0.097    0.315         0.085     0.275        0.043      0.097     0.036      0.081
422500    524500       0.76      2.02         0.184     0.213         0.104     0.339          0.105    0.342         0.092     0.299        0.046      0.104     0.038      0.086
423500    513500       0.74      1.96         0.178     0.206         0.058     0.190          0.060    0.195         0.049     0.158        0.045      0.102     0.038      0.085
423500    515500       0.73      1.94         0.173     0.201         0.058     0.188          0.058    0.189         0.047     0.154        0.043      0.096     0.035      0.079
423500    516500       0.73      1.93         0.172     0.200         0.058     0.188          0.059    0.191         0.048     0.156        0.042      0.094     0.035      0.078
423500    517500       0.73      1.93         0.172     0.199         0.058     0.189          0.059    0.192         0.049     0.158        0.041      0.092     0.034      0.076
423500    518500       0.73      1.94         0.172     0.199         0.061     0.198          0.063    0.204         0.052     0.169        0.041      0.091     0.034      0.076
423500    519500       0.73      1.93         0.170     0.197         0.061     0.199          0.063    0.205         0.052     0.170        0.040      0.089     0.033      0.075
423500    520500       0.72      1.92         0.172     0.199         0.063     0.205          0.065    0.210         0.054     0.175        0.040      0.091     0.034      0.076
423500    521500       0.73      1.95         0.173     0.201         0.065     0.212          0.067    0.219         0.056     0.182        0.042      0.094     0.035      0.078
423500    522500       0.71      1.89         0.175     0.203         0.068     0.221          0.070    0.228         0.058     0.190        0.042      0.095     0.035      0.079
423500    523500       0.76      2.02         0.180     0.209         0.098     0.317          0.098    0.319         0.085     0.277        0.044      0.100     0.037      0.083
423500    524500       0.75      1.99         0.185     0.215         0.105     0.340          0.105    0.342         0.091     0.297        0.047      0.106     0.039      0.088
424500    513500       0.74      1.96         0.186     0.216         0.066     0.214          0.067    0.219         0.054     0.176        0.049      0.111     0.041      0.091
424500    514500       0.74      1.98         0.187     0.217         0.068     0.220          0.069    0.224         0.055     0.180        0.050      0.112     0.041      0.092
424500    515500       0.73      1.95         0.184     0.213         0.068     0.220          0.068    0.220         0.054     0.177        0.048      0.109     0.039      0.089
424500    516500       0.73      1.94         0.184     0.214         0.067     0.218          0.068    0.221         0.055     0.178        0.049      0.110     0.040      0.090
424500    517500       0.73      1.93         0.182     0.211         0.066     0.214          0.067    0.217         0.054     0.176        0.047      0.106     0.039      0.087
424500    518500       0.72      1.92         0.178     0.207         0.066     0.215          0.068    0.220         0.055     0.180        0.045      0.102     0.038      0.085
424500    519500       0.72      1.92         0.177     0.205         0.065     0.212          0.067    0.217         0.055     0.179        0.044      0.099     0.036      0.082
424500    520500       0.73      1.93         0.177     0.205         0.066     0.216          0.068    0.222         0.056     0.183        0.044      0.098     0.036      0.081
424500    521500       0.73      1.94         0.178     0.206         0.068     0.221          0.070    0.229         0.058     0.189        0.043      0.098     0.036      0.082
424500    522500       0.77      2.05         0.180     0.209         0.071     0.232          0.074    0.241         0.062     0.200        0.044      0.100     0.037      0.083
424500    523500       0.72      1.92         0.185     0.215         0.102     0.331          0.103    0.335         0.089     0.290        0.047      0.106     0.039      0.088
424500    524500       0.74      1.98         0.191     0.221         0.109     0.354          0.110    0.358         0.095     0.310        0.050      0.112     0.041      0.093
425500    514500       0.76      2.02         0.202     0.234         0.081     0.262          0.082    0.267         0.065     0.212        0.058      0.131     0.047      0.106
425500    515500       0.76      2.01         0.197     0.229         0.080     0.260          0.080    0.261         0.064     0.208        0.056      0.126     0.045      0.101
425500    516500       0.74      1.97         0.197     0.228         0.078     0.255          0.079    0.258         0.063     0.206        0.056      0.125     0.045      0.101
425500    517500       0.74      1.96         0.194     0.225         0.076     0.248          0.077    0.251         0.062     0.200        0.054      0.121     0.044      0.098
425500    518500       0.73      1.93         0.187     0.217         0.072     0.233          0.073    0.236         0.059     0.191        0.051      0.114     0.041      0.093
425500    519500       0.73      1.93         0.183     0.212         0.068     0.221          0.070    0.226         0.057     0.184        0.047      0.106     0.039      0.088
425500    520500       0.73      1.94         0.184     0.214         0.072     0.233          0.073    0.236         0.059     0.193        0.048      0.107     0.039      0.088
425500    521500       0.73      1.95         0.188     0.218         0.076     0.247          0.078    0.252         0.063     0.206        0.049      0.110     0.040      0.090
425500    522500       0.73      1.95         0.192     0.223         0.082     0.266          0.084    0.272         0.068     0.222        0.050      0.113     0.041      0.093
425500    524500       0.74      1.97         0.202     0.234         0.096     0.311          0.099    0.321         0.082     0.265        0.054      0.122     0.044      0.100
426500    513500       0.89      2.38         0.222     0.258         0.097     0.315          0.099    0.321         0.077     0.251        0.067      0.151     0.054      0.122
426500    514500       0.83      2.22         0.228     0.265         0.103     0.335          0.105    0.342         0.082     0.267        0.071      0.159     0.057      0.128
426500    515500       0.88      2.33         0.224     0.260         0.102     0.333          0.103    0.336         0.081     0.264        0.068      0.153     0.055      0.123
426500    516500       0.78      2.08         0.222     0.257         0.099     0.323          0.101    0.328         0.079     0.257        0.067      0.150     0.054      0.121
426500    517500       0.75      2.00         0.209     0.243         0.089     0.289          0.090    0.294         0.072     0.233        0.061      0.137     0.049      0.110
426500    518500       0.75      2.00         0.197     0.229         0.079     0.256          0.081    0.264         0.065     0.211        0.056      0.126     0.046      0.103



                                                                                          42
                                                                 DARLINGTON BOROUGH COUNCIL


                                                                          APPENDIX 1c
                                                                    Background Concentrations


Darlington Background Concentrations - SO2 for 2001; co for 2001; Benzene for 2001 / 2003 / 2010; 1,3-Butadiene for 2001 / 2003 - 428500 to 433500                           Page 2 of 3

                         SO2 2001                 CO 2001               Benzene 2001            Benzene 2003            Benzene 2010         1,3-Butadiene 2001   1,3-Butadiene 2003
                        annual mean             annual mean             annual mean             annual mean             annual mean             annual mean         annual mean
X         Y            ppb      µg/m³          ppm      mg/m³          ppb      µg/m³          ppb      µg/m³          ppb      µg/m³          ppb      µg/m³      ppb       µg/m³
428500    510500       0.76      2.03         0.188      0.218        0.068      0.220         0.067     0.218        0.053      0.172        0.049     0.111     0.040      0.091
428500    511500       0.77      2.04         0.201      0.233        0.078      0.255         0.078     0.255        0.062      0.200        0.056     0.126     0.046      0.103
428500    512500       0.80      2.14         0.224      0.260        0.099      0.323         0.100     0.325        0.078      0.252        0.067     0.151     0.054      0.122
428500    513500       0.82      2.19         0.245      0.284        0.120      0.390         0.121     0.392        0.093      0.303        0.077     0.174     0.062      0.139
428500    514500       0.98      2.60         0.259      0.300        0.131      0.427         0.132     0.430        0.102      0.331        0.085     0.191     0.068      0.152
428500    515500       1.06      2.82         0.259      0.300        0.133      0.432         0.134     0.437        0.103      0.336        0.086     0.193     0.068      0.154
428500    516500       0.80      2.12         0.252      0.292        0.126      0.410         0.128     0.417        0.099      0.322        0.083     0.186     0.066      0.149
428500    517500       0.80      2.13         0.232      0.269        0.109      0.355         0.110     0.359        0.086      0.280        0.074     0.166     0.059      0.133
428500    518500       0.78      2.07         0.215      0.249        0.093      0.301         0.095     0.310        0.075      0.245        0.066     0.149     0.054      0.121
428500    519500       0.75      1.99         0.215      0.249        0.084      0.273         0.093     0.303        0.074      0.241        0.067     0.150     0.056      0.127
428500    520500       0.78      2.07         0.214      0.248        0.084      0.274         0.093     0.303        0.074      0.241        0.066     0.149     0.056      0.126
428500    521500       1.15      3.07         0.218      0.253        0.089      0.290         0.098     0.318        0.078      0.253        0.068     0.153     0.058      0.130
429500    509500       0.83       2.2         0.182      0.211        0.064      0.208         0.064     0.207        0.051      0.165        0.047     0.105     0.038      0.086
429500    510500       0.80       2.1         0.189      0.219        0.069      0.223         0.068     0.221        0.054      0.175        0.050     0.112     0.041      0.092
429500    511500       0.80       2.1         0.203      0.236        0.080      0.260         0.080     0.259        0.062      0.203        0.057     0.128     0.046      0.104
429500    512500       0.83       2.2         0.228      0.264        0.102      0.330         0.102     0.330        0.078      0.255        0.068     0.153     0.055      0.123
429500    513500       0.94       2.5         0.245      0.284        0.120      0.389         0.120     0.389        0.092      0.300        0.077     0.173     0.061      0.138
429500    514500       0.86       2.3         0.260      0.302        0.131      0.427         0.132     0.430        0.101      0.329        0.085     0.192     0.068      0.153
429500    515500       0.86       2.3         0.260      0.302        0.134      0.435         0.135     0.438        0.103      0.336        0.086     0.193     0.068      0.154
429500    516500       0.85       2.3         0.251      0.291        0.126      0.408         0.127     0.414        0.098      0.319        0.081     0.183     0.065      0.147
429500    517500       0.92       2.5         0.231      0.268        0.108      0.350         0.109     0.355        0.085      0.276        0.072     0.162     0.058      0.131
429500    518500       0.82       2.2         0.216      0.250        0.094      0.304         0.096     0.313        0.076      0.247        0.066     0.148     0.054      0.121
429500    519500       0.79       2.1         0.214      0.248        0.084      0.274         0.094     0.305        0.074      0.242        0.066     0.148     0.056      0.125
429500    520500       0.79       2.1         0.213      0.247        0.084      0.273         0.093     0.303        0.074      0.241        0.066     0.148     0.056      0.125
429500    521500       0.80       2.1         0.221      0.256        0.090      0.291         0.099     0.321        0.078      0.255        0.069     0.156     0.059      0.132
430500    508500       0.77       2.0         0.180      0.209        0.061      0.199         0.060     0.196        0.048      0.155        0.045     0.102     0.037      0.084
430500    510500       0.83       2.2         0.188      0.218        0.067      0.218         0.066     0.215        0.052      0.170        0.049      0.11     0.040      0.090
430500    511500       0.80       2.1         0.201      0.233        0.077      0.251         0.077     0.249        0.060      0.195        0.056     0.125     0.045      0.102
430500    512500       0.80       2.1         0.224      0.260        0.097      0.316         0.097     0.315        0.075      0.243        0.066     0.149     0.053      0.120
430500    513500       0.96       2.6         0.239      0.277        0.111      0.362         0.111     0.360        0.085      0.276        0.073     0.164     0.058      0.131
430500    514500       0.85       2.3         0.252      0.292        0.122      0.395         0.121     0.394        0.093      0.301        0.080     0.181     0.064      0.145
430500    515500       0.80       2.1         0.253      0.294        0.124      0.404         0.124     0.404        0.095      0.308        0.082     0.184     0.065      0.147
430500    516500       0.83       2.2         0.245      0.284        0.117      0.380         0.118     0.383        0.090      0.294        0.078     0.175     0.062      0.140
430500    517500       0.82       2.2         0.224      0.260        0.100      0.325         0.101     0.327        0.078      0.254        0.068     0.153     0.055      0.124
430500    518500       0.79       2.1         0.211      0.245        0.088      0.286         0.091     0.297        0.072      0.233        0.063     0.142     0.052      0.117
430500    519500       0.77       2.0         0.211      0.245        0.081      0.262         0.090     0.294        0.071      0.232        0.064     0.145     0.055      0.123
430500    520500       0.76       2.0         0.209      0.243        0.078      0.255         0.088     0.287        0.070      0.227        0.064     0.143     0.054      0.122
430500    521500       0.76       2.0         0.214      0.248        0.081      0.264         0.091     0.296        0.072      0.235        0.066     0.149     0.056      0.127
431500    510500       0.79       2.1         0.184      0.214        0.065      0.211         0.064     0.209        0.051      0.165        0.047     0.106     0.039      0.087
431500    511500       0.78       2.1         0.197      0.228        0.074      0.240         0.073     0.237        0.057      0.186        0.053     0.119     0.043      0.097
431500    512500       0.80       2.1         0.211      0.245        0.086      0.280         0.086     0.279        0.066      0.216        0.060     0.135     0.049      0.110
431500    513500       1.06       2.8         0.219      0.254        0.094      0.306         0.094     0.304        0.072      0.234        0.064     0.144     0.052      0.116
431500    514500       1.09       2.9         0.231      0.268        0.103      0.335         0.102     0.333        0.078      0.255        0.071      0.16     0.057      0.128
431500    515500       0.82       2.2         0.233      0.270        0.106      0.344         0.105     0.342        0.081      0.262        0.072     0.163     0.058      0.131
431500    516500       0.91       2.4         0.226      0.262        0.100      0.326         0.101     0.327        0.078      0.252        0.069     0.156     0.056      0.126
431500    517500       0.82       2.2         0.214      0.248        0.091      0.296         0.091     0.296        0.071      0.230        0.064     0.144     0.052      0.116
431500    518500       0.77       2.1         0.208      0.241        0.085      0.275         0.087     0.283        0.068      0.222        0.061     0.137     0.050      0.113
431500    519500       0.76       2.0         0.198      0.230        0.078      0.252         0.080     0.260        0.063      0.206        0.056     0.125     0.046      0.104
431500    520500       0.76       2.0         0.196      0.227        0.075      0.244         0.078     0.253        0.062      0.201        0.055     0.123     0.045      0.102
431500    521500       0.76       2.0         0.198      0.230        0.076      0.247         0.079     0.257        0.063      0.205        0.056     0.126     0.047      0.105
432500    510500       0.80       2.1         0.185      0.215        0.065      0.210         0.064     0.207        0.050      0.164        0.046     0.103     0.038      0.085
432500    511500       0.80       2.1         0.194      0.225        0.071      0.231         0.070     0.229        0.055      0.180        0.051     0.114     0.041      0.093
432500    512500       0.79       2.1         0.203      0.235        0.079      0.256         0.078     0.255        0.061      0.199        0.055     0.124     0.045      0.101
432500    513500       0.89       2.4         0.207      0.240        0.084      0.272         0.083     0.269        0.065      0.210        0.057     0.129     0.046      0.104
432500    514500       0.89       2.4         0.217      0.252        0.090      0.294         0.090     0.292        0.070      0.226        0.063     0.142     0.051      0.115
432500    515500       0.82       2.2         0.217      0.252        0.092      0.298         0.091     0.295        0.070      0.228        0.064     0.143     0.051      0.115
432500    516500       0.80       2.1         0.213      0.247        0.088      0.285         0.088     0.285        0.068      0.222        0.060     0.136     0.049      0.110
432500    517500       0.79       2.1         0.207      0.240        0.083      0.271         0.083     0.271        0.065      0.212        0.058      0.13     0.047      0.105
432500    518500       0.77       2.1         0.204      0.237        0.080      0.261         0.082     0.268        0.065      0.211        0.057     0.128     0.047      0.105
432500    519500       0.76       2.0         0.196      0.227        0.075      0.244         0.078     0.252        0.062      0.201        0.052     0.118     0.044      0.098
432500    520500       0.76       2.0         0.195      0.226        0.074      0.240         0.077     0.250        0.061      0.199        0.052     0.117     0.043      0.097
432500    521500       0.76       2.0         0.197      0.229        0.075      0.245         0.079     0.256        0.063      0.204        0.054     0.121     0.045      0.101
433500    509500       0.79       2.1         0.180      0.209        0.062      0.200         0.061     0.197        0.048      0.156        0.044     0.0983    0.036      0.081
433500    510500       0.79       2.1         0.184      0.213        0.064      0.207         0.063     0.204        0.050      0.161        0.045     0.101     0.037      0.083
433500    511500       0.80       2.1         0.190      0.220        0.069      0.223         0.067     0.219        0.053      0.172        0.048     0.109     0.040      0.089
433500    512500       0.79       2.1         0.197      0.228        0.075      0.243         0.074     0.239        0.058      0.187        0.052     0.117     0.042      0.095
433500    513500       0.81       2.2         0.199      0.231        0.078      0.252         0.076     0.248        0.060      0.194        0.053      0.12     0.043      0.097
433500    514500       0.82       2.2         0.208      0.241        0.082      0.268         0.082     0.265        0.063      0.206        0.058      0.13     0.047      0.105
433500    515500       0.80       2.1         0.208      0.241        0.084      0.272         0.082     0.268        0.064      0.209        0.058     0.131     0.047      0.106




                                                                                          43
                                                                  DARLINGTON BOROUGH COUNCIL


                                                                          APPENDIX 1c
                                                                    Background Concentrations


Darlington Background Concentrations - SO2 for 2001; co for 2001; Benzene for 2001 / 2003 / 2010; 1,3-Butadiene for 2001 / 2003 - 434500 to 437500                            Page 3 of 3

                         SO2 2001                 CO 2001               Benzene 2001            Benzene 2003            Benzene 2010          1,3-Butadiene 2001   1,3-Butadiene 2003
                        annual mean             annual mean             annual mean             annual mean             annual mean              annual mean          annual mean
X         Y            ppb      µg/m³          ppm      mg/m³          ppb       µg/m³         ppb       µg/m³         ppb       µg/m³         ppb       µg/m³      ppb       µg/m³


434500    508500       0.79       2.1         0.179      0.208        0.061      0.198         0.060     0.194        0.047      0.154        0.043      0.0971    0.035      0.080
434500    509500       0.79       2.1         0.181      0.210        0.063      0.204         0.062     0.200        0.049      0.159        0.044       0.1      0.036      0.082
434500    510500       0.80       2.1         0.184      0.213        0.065      0.210         0.064     0.207        0.050      0.164        0.045      0.102     0.037      0.084
434500    512500       0.84       2.2         0.193      0.224        0.072      0.234         0.071     0.232        0.056      0.183        0.051      0.114     0.042      0.093
434500    513500       1.00       2.7         0.195      0.226        0.074      0.242         0.074     0.239        0.058      0.189        0.052      0.116     0.042      0.095
434500    514500       0.82       2.2         0.202      0.234        0.078      0.254         0.078     0.253        0.061      0.198        0.056      0.125     0.045      0.102
434500    515500       0.79       2.1         0.202      0.234        0.078      0.255         0.078     0.254        0.061      0.199        0.056      0.125     0.045      0.102
434500    516500       0.80       2.1         0.201      0.233        0.077      0.251         0.078     0.252        0.061      0.198        0.055      0.123     0.044      0.100
434500    517500       0.82       2.2         0.200      0.232        0.077      0.249         0.078     0.252        0.061      0.199        0.054      0.122     0.044      0.100
434500    518500       0.78       2.1         0.200      0.232        0.076      0.248         0.079     0.257        0.062      0.203        0.055      0.124     0.045      0.102
434500    519500       0.77       2.1         0.196      0.227        0.074      0.242         0.078     0.252        0.062      0.200        0.053      0.119     0.044      0.099
434500    520500       0.76       2.0         0.197      0.228        0.075      0.244         0.078     0.254        0.062      0.202        0.053      0.119     0.044      0.099
434500    521500       0.76       2.0         0.198      0.230        0.076      0.247         0.080     0.260        0.064      0.207        0.054      0.122     0.045      0.101
434500    522500       0.74       2.0         0.198      0.230        0.077      0.251         0.081     0.263        0.065      0.210        0.054      0.122     0.045      0.102
435500    512500       0.82       2.2         0.191      0.222        0.071      0.230         0.070     0.229        0.056      0.181        0.050      0.113     0.042      0.093
435500    513500       0.83       2.2         0.192      0.223        0.072      0.235         0.072     0.235        0.057      0.185        0.051      0.114     0.042      0.094
435500    514500       0.83       2.2         0.200      0.232        0.077      0.249         0.077     0.249        0.060      0.195        0.055      0.124     0.045      0.101
435500    515500       0.80       2.1         0.200      0.232        0.077      0.251         0.077     0.250        0.060      0.196        0.055      0.123     0.045      0.101
435500    516500       0.79       2.1         0.199      0.231        0.076      0.248         0.077     0.251        0.061      0.197        0.054      0.122     0.044      0.100
435500    517500       0.78       2.1         0.199      0.231        0.076      0.247         0.078     0.252        0.061      0.198        0.054      0.122     0.045      0.101
435500    518500       0.77       2.1         0.201      0.233        0.076      0.247         0.079     0.257        0.062      0.203        0.056      0.125     0.046      0.104
435500    519500       0.77       2.0         0.196      0.227        0.074      0.241         0.078     0.253        0.062      0.201        0.053       0.12     0.044      0.100
435500    520500       0.76       2.0         0.197      0.228        0.075      0.243         0.078     0.255        0.062      0.203        0.053       0.12     0.045      0.101
435500    521500       0.77       2.1         0.198      0.230        0.076      0.248         0.081     0.262        0.064      0.208        0.055      0.124     0.046      0.104
436500    511500       0.83       2.2         0.187      0.217        0.066      0.216         0.066     0.215        0.052      0.169        0.048      0.109     0.040      0.090
436500    512500       0.83       2.2         0.191      0.221        0.070      0.226         0.069     0.225        0.054      0.177        0.050      0.112     0.041      0.093
436500    513500       0.95       2.5         0.191      0.221        0.071      0.230         0.070     0.229        0.055      0.180        0.050      0.113     0.042      0.094
436500    514500       0.82       2.2         0.198      0.230        0.075      0.244         0.075     0.243        0.059      0.191        0.055      0.123     0.044      0.100
436500    518500       0.78       2.1         0.199      0.231        0.076      0.246         0.078     0.253        0.062      0.200        0.055      0.124     0.046      0.103
436500    519500       0.78       2.1         0.194      0.225        0.073      0.238         0.076     0.247        0.060      0.196        0.052      0.118     0.043      0.098
436500    520500       0.79       2.1         0.194      0.225        0.074      0.240         0.077     0.249        0.061      0.198        0.052      0.118     0.044      0.098
436500    521500       0.80       2.1         0.196      0.227        0.075      0.245         0.078     0.255        0.062      0.202        0.054      0.121     0.045      0.101
437500    519500       0.82       2.2         0.197      0.229        0.075      0.245         0.078     0.254        0.062      0.202        0.054      0.121     0.044      0.100
437500    520500       0.83       2.2         0.197      0.228        0.076      0.246         0.078     0.255        0.062      0.203        0.053       0.12     0.044      0.100
437500    521500       0.86       2.3         0.199      0.231        0.077      0.251         0.081     0.262        0.064      0.208        0.055      0.123     0.046      0.103
437500    522500       0.86       2.3         0.201      0.233        0.078      0.254          0.1      0.266        0.065      0.212        0.056      0.126     0.047      0.105


                       ppb      µg/m³          ppm      mg/m³          ppb       µg/m³         ppb       µg/m³         ppb       µg/m³         ppb       µg/m³      ppb       µg/m³
          minimums     0.70      1.85          0.16      0.19         0.052      0.169         0.052     0.170        0.044      0.142        0.033      0.075     0.028      0.064


          maximums     1.15      3.07          0.26      0.30         0.134      0.435         0.140     0.438        0.103      0.336        0.086      0.193     0.068      0.154




                                                                                          44
                                          DARLINGTON BOROUGH COUNCIL

                                                     APPENDIX 2
                                               Traffic Flow Projections


Road     Location                                             Year        ADT     2005                      2010
                                                                                  proj     2005       %     proj
                                                                                          2nd R&A    +/-
A1(M)    South of Darlington                                   2005       44000   44000   43030     +2 %    47000
A1(M)    North of Burtree                                      2001       21667   23270                     25000
A66(M)   South of Darlington                                   2002       14956   15760                     17000
A66      Stockton Road - east of A1150                         1997       33917   38530                     42000
A66(T)   Bridge Road - west of A167                            2005       16000   16000   20420     -21 %   18000
         Inner Ring Road – Victoria Road                       2004       23449   23900                     26000
         Inner Ring Road – Fire Station                        2004       22431   22900                     25000
A68      West Auckland Road - south of A1(M)                   2004       17423   17800   20040     -12 %   19000
A68      West Auckland Road - Faverdale                        2004       20128   20500                     22000
A167     Harrowgate Village - north of Longfield Road          2004       24734   25200   28420     -12 %   27000
A167     High Northgate - north of John Street                 2004       22588   23000   18670     +18 %   25000
B6279    Haughton Road - north of Freemans Place               2004       16030   16400   18670     -13 %   18000
B6280    Parkgate                                              2004       29615   30200   29400     +2 %    33000
A167     Grange Road – opposite Polam School                   2004       15140   15400                     17000
A68      Woodlands Rd, near Memorial Hospital                  2004       22699   23200                     25000
A167     Grange Road - north of A66 by-pass                    2004       14137   14400   15440     -7 %    16000
B6280    Carmel Road North - south of Clareville Road          2004       14411   14700   15990     -8 %    16000
A1150    Whinfield Road - near Whinbush Way                    2004       17338   17700   24620     -39 %   19000
A167     North Road – near Fitzwilliam Drive                   2004       21051   21500   25750     -19 %   23000
A167     Coatham Mundeville, south of A1(M)                    2005       21000   21000   24200     -13 %   24000
B6279    Haughton Green                                        2004       15258   15600                     17000
B6279    Haughton Road / Blacketts Road                        2004       19780   20200                     22000
C182     McMullen Road - near Lingfield Road                   2004       11501   11700   10090     +13 %   13000
A67      Carmel Road South - near Blackwell Lane               2004       12538   12800   12540     +2 %    14000
B6280    Yarm Road at Teal Road junction                       2001       19637   21090                     23000
B6279    Stockton Road - south of Winchester Way               2000       16935   18460                     20000
A67      Coniscliffe Road - near ED Walker Home                2004       8811    9000    10190     -13 %   10000
B6280    Morton Park                                           2004       17288   17600                     19000
A6072    North of Redworth                                     2005       12000   12000   13650     -12 %   14000
A67      Coniscliffe Road - at Baydale beck                    2002       12400   13070                     14000
C        Victoria Road - east of inner ring road               2002       11501   12120                     13000
C        Neasham Road at Eastbourne Road junction              2002       11214   11500                     13000
B6280    Coniscliffe Road - west of Cleveland Avenue           2000       9706    10580                     12000
A67      East of A66 by-pass                                   2005       9000    9000    10440     -14 %   10000




                                                         45
                                       DARLINGTON BOROUGH COUNCIL


                                             APPENDIX 3
                              Part B Commercial / Small Industrial Processes

                 Process                                 Company                              Location
Animal Feed Compounding Process          Feedco                                Piercebridge
Animal Feed Compounding Process          CM Varley & Co Limited                Red Barnes Way
Cement Batching Process                  Bardon Concrete                       Cleveland Street
Cement Batching Process                  Tarmac Northern Limited               Yarm Road Industrial Estate
Cement Batching Process                  Lafarge Aggregates Limited            Blacketts Road
Coated Roadstone Process                 Express Asphalt Darlington            Cleveland Trading Estate
Crematoria                               Darlington Borough Council            Carmel Road North
Metal Coating Process                    Cleveland Bridge Limited              Yarm Road
Metal Coating Process                    Cummins Engine Company Limited        Yarm Road
Metal Coating Process                    A W Fabrication Limited               St Nicholas Industrial Estate
Mobile Screen No 1                       TM Ward Limited                       Faverdale Industrial Estate
Crushing / Screening Plant No 2          TM Ward Limited                       Faverdale Industrial Estate
Mobile Crushing Plant No 3               TM Ward Limited                       Faverdale Industrial Estate
Mobile Crushing Plant No 1               Tyne Tees Crushing & Screening Ltd    Faverdale Industrial Estate
Mobile Crushing Plant No 1               Cemex Materials UK Limited            Littleburn Industrial Estate
Mobile Crushing Plant No 2               Cemex Materials UK Limited            Littleburn Industrial Estate
Mobile Bitumen Coating Plant             Cemex Materials UK Limited            Littleburn Industrial Estate
Natural Gas Odourising Process           Northern Gas Network Limited          Little Burdon
Petrol Service Station                   Haughton Road Service Station         High Northgate
Petrol Service Station                   Yarm Road Filling Station             Yarm Road
Petrol Service Station                   Wm. Morrison Supermarkets plc         Morton Park
Petrol Service Station                   Bank Top Garage                       Neasham Road
Petrol Service Station                   Grange Road Filling Station           Grange Road
Petrol Service Station                   ASDA Stores                           Whinfield Way
Petrol Service Station                   Sadberge Service Station              Sadberge
Petrol Service Station                   Wm. Morrison Supermarkets plc         North Road
Petrol Service Station                   Shell Woodland Road                   Woodland Road
Petrol Service Station                   Darlington South Service Station      Carmel Road South
Petrol Service Station                   Kirklee Service Station               Victoria Road
Petrol Service Station                   Snax 24                               High Northgate
Powder Coating Manufacturing Process     Dupont Powder Coatings Limited        Whessoe Road
Timber & Wood Combustion Process         Magnet Limited                        Yarm Road Business Park
Timber Process                           Amdega Limited                        Faverdale Industrial Estate
Vehicle Respraying Process               CD Bramall Ford                       St Cuthbert's Way
Vehicle Respraying Process               Sherwoods Limited                     Chesnut Street
Vehicle Respraying Process               Corus Trailers Limited                Whessoe Road
Vehicle Respraying Process               Vardy Vehicle Remarketing             Allington Way
Vehicle Respraying Process               S G Petch                             McMullen Road
Waste oil burner                         Bank Top Garage                       Neasham Road
Waste oil burner                         MEM Motors                            Allan Street
Waste oil burner                         The Autocentre                        Neasham Road
Waste oil burner                         Reeds Garage                          Haughton Road
Waste oil burner                         Ron Blackbourn Garage Services        Weir Street
Waste oil burner                         St John's Service & Repair Centre     Barton Street
Wood Coating Process                     Magnet Limited                        Yarm Road Industrial estate
Wood Coating Process                     Amdega Limited                        Faverdale Industrial Estate

                 2005           (2003)
Processes         28            (28)
Petrol Station    12            (15)
Waste Oil Burners 6             (8)

Total            46             (51)




                                                      46
                                          DARLINGTON BOROUGH COUNCIL


                                                   APPENDIX 4
                                         Part A Large Industrial Processes



   File                  Company                             Site                      Comment

NP3237PX   Ellison Metal Finishing Ltd             Yarm Rd Ind Est    no significant emissions



AJ 4405    Protim Solignum                         Yarm Rd Ind Est    no significant emissions


                                                                      registered in Darlington Council area
AK 4583    Hydro Polymers Ltd                      Newton Aycliffe
                                                                      no significant emissions

                                                                      registered in Darlington Council area
AO 0725    Hydro Polymers Ltd                      Newton Aycliffe
                                                                      no significant emissions

                                                                      registered in Darlington Council area
AK 6225    Dynea Aycliffe Ltd                      Newton Aycliffe
                                                                      no significant emissions
                                                                      registered in Darlington Council area
AK 5997    Lucite International Ltd                Newton Aycliffe
                                                                      no significant emissions




                                                        47
                                      DARLINGTON BOROUGH COUNCIL


                                                 References



Reference 1   Air Quality in the Tees Valley 2002 – 2005        published by the TVEPG, May 2006


Reference 2   Traffic Pollution Study in the Tees Valley 2004   published by the TVEPG, July 2005


Reference 3   Impact of industrial sulphur dioxide emissions

              on the 15 minute objective in the Tees Valley     published by the TVEPG, May 2003




                                                      48
                                  DARLINGTON BOROUGH COUNCIL




Contact :

Carol Strong
Public Protection Division
Darlington Borough Council
11 Houndgate
Darlington, DL1 5RF


Telephone – 01325 388570     Fax – 01325 388550        e-mail – carol.strong@darlington.gov.uk




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