| 139 | How do I process short-term NO2 diffusion tube monitoring survey results to obtain an annual mean NO2 concentration estimate? | diffusion tube short-term annual mean NO2 | 14/04/2021 |
| 8 | Where can I find information about Air Quality Monitoring Equipment Suppliers? | Monitoring supplier equipment mcerts | 19/01/2021 |
| 140 | Can I use a ‘Low Cost’ Sensor System for LAQM Reporting? | Monitoring Low-Cost Equipment Sensors | 19/01/2021 |
| 105 | Impacts of Vegetation on Urban Air Pollution | AQAP Planning Modelling Road Mitigation Tree Vegetation | 02/12/2020 |
| 41 | How effective are physical barriers alongside busy roads in reducing pollutant concentration at adjacent areas? | Planning AQAP Road mitigation trees reducing barrier | 01/12/2020 |
| 138 | How do I bias adjust my diffusion tube data if I change supplier and/or preparation method during the course of a year? | Bias diffusion tubes preparation method change supplier | 15/10/2019 |
| 103 | What will happen if a local authority fails to achieve the prescribed objectives in its area? | AQMA AQAP Exceedence exceeding exceedance objective AQMA fails | 16/10/2017 |
| 15 | None of the screening tools available for stacks (e.g. the HMIP D1 method or the LAQM Emissions Screening Tools) are applicable to my installation due to a low exit velocity, or buildings taller than the stack. How do I assess its air quality impact? | Modelling Industrial exit velocity stack building taller D1Height screen | 13/10/2017 |
| 93 | Where there are multiple boilers/furnaces which are individually below the Clean Air Act threshold of 366.4 kilowatts and are served by several chimneys, how should we check whether or not exceedences of the NO2 objective are likely? | Industrial Pollutant Boiler Clean Air Act Multiple NO2 NOX Nitrogen | 13/10/2017 |
| 99 | How do I calculate chimney height for fan-diluted emissions below roof level? | How do I calculate chimney height for fan-diluted emissions below roof level? | 13/10/2017 |
| 137 | What Defra funding sources can Local Authorities access to support their air quality work? | AQAP Funding Grant Fund | 06/10/2016 |
| 127 | What are the steps and timescales involved in the appraisal process for Review and Assessment reports, Air Quality Action Plans and Action Plan Progress Reports? How may a local authority track their reports through the appraisal process? | Reporting AQAP appraised appraisal assessment Progress report submission | 01/02/2011 |
| 5 | Measured nitrogen oxides (NOx) and/or nitrogen dioxide (NO2) concentrations in my local authority area do not appear to be declining in line with national forecasts. Should I take this into account in my Review and Assessment work? | Pollutant Diffusion Nitrogen NOx NO2 trends | 01/09/2010 |
| 16 | How do I calculate an appropriate chimney height to ensure emissions of NO2 from small gas boilers controlled by the Clean Air Act do not lead to an exceedence of the Air Quality Strategy's objective for nitrogen dioxide (NO2) prescribed in the Air Quality Regulations 2000, SI No 928? | Modelling Industrial chimney D1 clean air act Stack Height CHM | 01/03/2010 |
| 18 | Can I use the Chimney Heights Memorandum to determine the stack height for room-sealed boiler flue systems? | Modelling Industrial chimney height memorandum room-sealed boiler | 01/03/2010 |
| 42 | How effective is photocatalytic paint in reducing ambient nitrogen oxides? | AQAP Planning paint photocatalytic mitigation effective | 01/03/2010 |
| 46 | How should emissions from gas boilers, not subject to LAPC/PPC controls, be considered for the purposes of LAQM reviews and assessments? | Industrial Modelling boiler gas small chimney height approvalfurnace | 01/03/2010 |
| 89 | The Process Guidance Note states that a stack height calculation is required following the HMIP D1 Method. Where can I find this? | Industrial Modelling D1 Stack Chimney Height clean air act | 01/03/2010 |
| 100 | How do I calculate an appropriate chimney height for furnaces/boilers not subject to controls under the Clean Air Act? | Modelling Industrial chimney height stack boiler gas CHMlow Nox burner Memorandum condensing | 01/03/2010 |
| 101 | How do I calculate chimney height for multiple gas boilers/furnaces which are individually below the Clean Air Act threshold of 366.4 kilowatts and are not served by one single chimney but several separate ones? | Modelling Industrial chimney multiple clean air act Stack Height | 01/03/2010 |
| 110 | What should I do if the targets set for 2010 continue to exceed the air quality objective/EU limit value? | AQMA AQAP Exceedence exceeding exceedance | 01/03/2010 |
| 111 | What is the Supplementary Assistance: Chimney Height Calculation Spreadsheet? | Modelling Industrial Pollutant SO2 Stack Chimney Height | 01/03/2010 |
| 129 | What level of detail in respect of cost effectiveness of measures is required in the action plan? | AQAP Cost Measure | 01/03/2010 |
| 130 | Where do I find good practice LTP2 examples? | AQAP LTP good practice example report shared priority | 01/03/2010 |
