Riverside Energy Park Environmental Permit Appendices APPENDIX: AIR QUALITY ASSESSMENT D DISPERSION MODELLING REPORT December 2018 Revision 0 Riverside Energy Park Dispersion Modelling Report i Riverside Energy Park Dispersion Modelling Report Contents 1 Introduction ................................................................................................................................. 1 1.2 Project Description ........................................................................................................ 1 1.3 The Objective ................................................................................................................ 1 2 Legislation ................................................................................................................................... 2 2.1 European Air Quality Legislation ................................................................................... 2 2.2 UK Air Quality Legislation and Strategy ........................................................................ 2 2.3 Industrial Pollution Regulation ....................................................................................... 3 3 Air Quality Standards, Objectives and Guidelines .................................................................. 7 3.1 Nitrogen dioxide ............................................................................................................. 7 3.2 Sulphur dioxide .............................................................................................................. 7 3.3 Particulate matter .......................................................................................................... 8 3.4 Carbon monoxide .......................................................................................................... 8 3.5 Hydrogen chloride ......................................................................................................... 9 3.6 Hydrogen fluoride .......................................................................................................... 9 3.7 Ammonia ....................................................................................................................... 9 3.8 Metals ............................................................................................................................ 9 3.9 Volatile Organic Compounds (VOCs).......................................................................... 10 3.10 Dioxins and furans ....................................................................................................... 11 3.11 Polychlorinated biphenyl (PCBs) ................................................................................. 11 3.12 Polycyclic Aromatic Hydrocarbons (PAHs) ................................................................. 11 3.13 Summary ..................................................................................................................... 11 4 Baseline Air Quality .................................................................................................................. 14 4.1 Summary ..................................................................................................................... 14 5 Sensitive Receptors .................................................................................................................. 16 5.1 Human Sensitive Receptors ........................................................................................ 16 5.2 Ecological Sensitive Receptors ................................................................................... 17 6 Dispersion Modelling Methodology ........................................................................................ 21 6.1 Selection of model ....................................................................................................... 21 6.2 Chemistry .................................................................................................................... 25 6.3 Modelling assumptions ................................................................................................ 25 7 Stack Height Analysis ............................................................................................................... 27 8 Impact on Human Health .......................................................................................................... 30 8.2 Screening .................................................................................................................... 30 8.3 Results ......................................................................................................................... 30 8.4 ERF Only ..................................................................................................................... 31 8.5 Biogas engine only ...................................................................................................... 33 8.6 Combined operation of ERF and biogas engine ......................................................... 34 9 Impact at Ecological Receptors ............................................................................................... 35 ii Riverside Energy Park Dispersion Modelling Report 9.2 Screening .................................................................................................................... 35 9.3 Atmospheric emissions - Critical Levels ...................................................................... 36 9.4 Deposition of emissions – Critical Loads .................................................................... 36 9.5 Results – atmospheric emissions – Critical Levels ..................................................... 38 9.6 Results – atmospheric emissions – Critical Loads ...................................................... 39 9.7 Results – further analysis at Inner Thames Marshes SSSI......................................... 39 9.8 Results – further analysis at Ingrebourne Marshes SSSI ........................................... 40 9.9 Results - Biogas engine .............................................................................................. 41 9.10 Results - Combined operation of ERF and biogas engine .......................................... 42 10 Conclusions ............................................................................................................................... 43 Tables Table 2-1: IED Emission Limit Values – Annex VI, Part 3, para 1.1 to 1.4 ............................................. 3 Table 2-2: Best Available Techniques – Air Emission Levels ................................................................. 4 Table 2-3: Medium Combustion Plant ELV for Engines .......................................................................... 6 Table 3-1: Environmental Assessment Levels (EALs) for Metals ......................................................... 10 Table 3-2: Air Quality Assessment Levels (AQALs) ............................................................................. 12 Table 3-3: Critical Levels for the Protection of Vegetation and Ecosystems ........................................ 13 Table 4-1: Summary of background concentrations selected for use in this assessment .................... 14 Table 5-1: Human Sensitive Receptors ................................................................................................. 16 Table 5-2: Ecological Sensitive Receptors ............................................................................................ 18 Table 8-1: Annual Mean Cadmium Analysis ......................................................................................... 32 Table 9-1: Screening Criteria................................................................................................................. 35 Table 9-2: Deposition Factors ............................................................................................................... 37 Table 9-3: Conversion Factors .............................................................................................................. 38 Table 9-4: Impact Analysis at Inner Thames Marshes SSSI ................................................................. 39 Table 9-5 Impact Analysis at Ingrebourne Marshes SSSI .................................................................... 40 iii Riverside Energy Park Dispersion Modelling Report iv Riverside Energy Park Dispersion Modelling Report 1 Introduction 1.1.1 Cory Environmental Holdings Limited (trading as Cory Riverside Energy) (Cory or the Applicant) is applying to the Environment Agency (EA) under The Environmental Permitting (England and Wales) Regulations 2016 (Environmental Permitting Regulations) for an Environmental Permit (EP) to operate an integrated Energy Park, to be known as Riverside Energy Park (REP). REP would comprise waste treatment facilities together with an associated Electrical Connection. 1.2 Project Description 1.2.1 A detailed description of REP is presented in Sections 1.4 to 1.6 of the Supporting Information. REP would be constructed on land immediately adjacent to Cory’s existing RRRF, within the London Borough of Bexley and would complement the operation of the existing facility. 1.2.2 The main elements of REP would be as follows: Energy Recovery Facility (ERF): to provide thermal treatment of Commercial and Industrial (C&I) residual (non-recyclable) waste with the potential for treatment of (non- recyclable) Municipal Solid Waste (MSW); Anaerobic Digestion facility: to process food and green