Diffusion DT9 Roadside 91.67 29.78 26.27 27.39 25.96 25.08 Tube Diffusion DT10 Roadside 91.67 32 33.62 29.48 27.81 26.98 Tube Diffusion DT11 Roadside 91.67 42.19 46.26 38.55 39.56 39.72 Tube Diffusion DT12 Roadside 27.81 Tube Diffusion tube data has been bias corrected Annualisation has been conducted where data capture is <75% If applicable, all data has been distance corrected for relevant exposure Notes: Exceedances of the NO2 annual mean objective of 40µg/m3 are shown in bold. NO2 annual exceeding 60µg/m3, indicating a potential exceedance of the NO2 1-hour mean objective are shown in bold and underlined. (1) Data capture for the monitoring period, in cases where monitoring was only carried out for part of the year. (2) Data capture for the full calendar year (e.g. if monitoring was carried out for 6 months, the maximum data capture for the full calendar year is 50%). (3) Means for diffusion tubes have been corrected for bias. All means have been as per Boxes 7.9 and 7.10 in LAQM.TG16 if “annualised” valid data capture for the full calendar year is less than 75%. See Appendix C for details. Figure A.1 Trends in Annual Mean NO2 Concentrations –
DT9 Roadside Diffusion Tube 91.67 29.78 26.27 27.39 25.96 25.08 DT10 Roadside Diffusion Tube 91.67 32 33.62 29.48 27.81 26.98 DT11 Roadside Diffusion Tube 91.67 42.19 46.26 38.55 39.56 39.72 DT12 Roadside Diffusion Tube 27.81 Diffusion tube data has been bias corrected Annualisation has been conducted where data capture is <75% If applicable, all data has been distance corrected for relevant exposure Notes: Exceedances of the NO2 annual mean objective of 40µg/m3 are shown in bold. NO2 annual exceeding 60µg/m3, indicating a potential exceedance of the NO2 1-hour mean objective are shown in bold and underlined. (1) Data capture for the monitoring period, in cases where monitoring was only carried out for part of the year. (2) Data capture for the full calendar year (e.g. if monitoring was carried out for 6 months, the maximum data capture for the full calendar year is 50%). (3) Means for diffusion tubes have been corrected for bias. All means have been “annualised” as per Boxes 7.9 and 7.10 in LAQM.TG16 if valid data capture for the full calendar year is less than 75%. See Appendix C for details. Figure A.1 – Trends in Annual Mean NO2 Concentrations
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