Daventry District Council Local Air Quality Management – Updating and Screening Assessment Ref: RKH/HH/Air Quality July 2003 1 Daventry District Council LAQM USA July 2003 CONTENTS Page 1 EXECUTIVE SUMMARY...........................................................................................................1 2 INTRODUCTION ........................................................................................................................2 2.1 Project Background....................................................................................................................2 2.2 Legislative Background..............................................................................................................2 2.3 Scope of USA..............................................................................................................................3 2.4 Assessment Criteria....................................................................................................................4 2.5 Reporting of USA.......................................................................................................................5 3 LOCAL BACKGROUND CONCENTRATIONS.................................................................6 4 MONITORING DATA................................................................................................................8 4.1 Carbon Monoxide (CO) ............................................................................................................8 4.2 Benzene........................................................................................................................................8 4.3 1,3-Butadiene...............................................................................................................................9 4.4 Lead ..............................................................................................................................................9 4.5 Nitrogen Dioxide..................................................................................................................... 10 4.6 Sulphur Dioxide....................................................................................................................... 13 4.7 Particulate matter - PM10 ........................................................................................................ 13 5 INDUSTRIAL SOURCES......................................................................................................... 16 5.1 Part A Processes ...................................................................................................................... 16 5.2 Part B Processes....................................................................................................................... 16 5.3 Petrol Stations.......................................................................................................................... 21 5.4 Major Fuel Storage Depots .................................................................................................... 24 5.5 Areas of Domestic Coal Burning .......................................................................................... 24 RKH/HH/Air Quality Page i Daventry District Council LAQM USA July 2003 5.6 Shipping .................................................................................................................................... 24 5.7 Railways..................................................................................................................................... 24 5.8 Airports ..................................................................................................................................... 24 5.9 Other Sources........................................................................................................................... 24 6 ROAD TRAFFIC SOURCES ................................................................................................... 25 6.1 Main Roads............................................................................................................................... 25 6.2 Significant Junctions................................................................................................................ 30 6.3 Bus Stations.............................................................................................................................. 30 7 AREAS WITH COMBINED IMPACTS................................................................................ 31 8 CONCLUSIONS AND RECOMMENDATIONS.............................................................. 32 RKH/HH/Air Quality Page ii Daventry District Council LAQM USA July 2003 LIST OF TABLES Page Table 2.1 USA Assessment Criteria .................................................................................................4 Table 3.1 Background Concentrations in DDC based on National Archive Mapping............6 Table 4.1 Benzene diffusion tube results (in µg/m3) for 1999-2001 carried out in DDC.......9 Table 4.2 Locations and annual average NO2 diffusion tube concentrations in 2002 and 2005 (projected) .............................................................................................................. 11 Table 4.3 Location of PM10 OSIRIS continuous analyser in DDC.......................................... 13 Table 4.4 PM10 monitoring data Guilsborough School site....................................................... 15 Table 5.1 Part B processes in Daventry District ......................................................................... 17 Table 5.2 Petrol Stations in DDC.................................................................................................. 23 Table 5.3 Location of stone quarry in Daventry ......................................................................... 24 Table 6.1 Daventry District Council traffic data........................................................................ 27 Table 6.2 DMRB receptor locations and predicted concentrations in µg/m3....................... 28 Table 6.3 DMRB predicted annual average NO2 2005 at diffusion tube locations along the M1 ........................................................................................................................................... 29 RKH/HH/Air Quality Page iii Daventry District Council LAQM USA July 2003 1 EXECUTIVE SUMMARY An Updating and Screening Assessment (USA) of air quality has been completed by Daventry District Council (DDC), as required under Part IV of the Environment Act, 1995, which requires local authorities throughout the UK to periodically review and assess air quality within its boundaries. The Council has completed the previous round of review and assessment. Based on its findings no Air Quality Management Area (AQMA) has been declared in DDC. The purpose of the USA is to again determine the likelihood of attaining current air quality standards and objectives. This necessitates re-visiting those sources of pollution within the Council’s area, whilst simultaneously considering any changes that have taken place since the first round of review and assessment. This includes consideration to revised/new air quality standards and objectives, revisions to road traffic emission factors, abatement strategies for industrial processes, new monitoring data, and the recently updated technical guidance made available to local authorities for fulfilling this duty. Results show that for all Part A processes no further assessment is required. All Part B processes comply with their emission limits. Hence no further assessment is required for Part B processes. Moreover, screening assessment of petrol stations indicated that no further assessment is required for petrol stations. For road traffic sources, monitoring and screening assessment indicate that there are exceedances of annual average NO2 2005 objective at certain locations along the M1 motorway. These exceedences occur at the most heavily trafficked sections of the M1. Predictions have been compared with bias-corrected diffusion tube results, which show that the predictive model (the Highways Agency’s Design Manual for Roads and Bridges (DMRB)) has performed relatively well. Results from the screening assessment, alongside the monitoring results, indicate that further assessment of NO2 is required for the sections along the M1, where relevant exposure of the public is fulfilled. th No predicted exceedances of annual average PM10 or the 90 percentile of 24 hour th mean PM10 have been shown to occur. Nor is the 99.8 percentile 1-hour NO2 objective shown to be a problem anywhere in DDC. The tabular summary below highlights the main conclusions for each pollutant: Pollutant Conclusion Carbon monoxide (CO) No further work required Benzene No further work required 1,3-Butadiene No further work required Lead (Pb) No further work required Nitrogen dioxide (NO2) Detailed assessment required Sulphur dioxide (SO2) No further work required Fine particulates (PM10) No further work required RKH/HH/Air Quality Page 1 Daventry District Council LAQM USA July 2003 2 INTRODUCTION 2.1 Project Background Daventry District Council (DDC) carried out an Updating and Screening Assessment (USA) of air pollution sources that may affect local air quality within the Daventry area. The USA is required to be undertaken as part of the local authority’s statutory duties as defined within Part IV of the Environment Act, 1995. Daventry District Council had carried out the previous review and assessment reports, which includes