LAQM FAQs

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13 When considering nitrogen dioxide, should I assess biomass combustion emissions against the annual mean objective or the 1-hour objective?Industrial Modelling biomass nitrogen nomogram 21/11/2016
15 None of the screening tools available for stacks (e.g. the HMIP D1 method, nomograms in LAQM.TG(09) 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 01/03/2010
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
17 When I use the nomograms in LAQM.TG(09) to assess emissions from biomass combustion, how and when should I calculate a background adjusted emission rate?Industrial nomogram headroom background adjusted biomass 5.19Figure 21/11/2016
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
19 Can an industrial source be discounted as being significant by saying that it is in compliance with its permit?Industrial industrial permit 21/11/2016
29 Do developers have to get planning permission for an industrial development before seeking a pollution control authorisation for it?Planning Industrial industrial planning permission Development 21/11/2016
35 I have identified the need to undertake a Detailed Assessment for Poultry Farms. Is there any guidance on how to do this?Industrial Reporting poultry turkey chicken farm PM10 21/11/2016
36 How can I identify areas in my district where burning of solid fuels such as coal, smokeless fuel or wood (i.e. biomass) might be leading to exceedences of the 2004 daily mean PM10 air quality objective (and the 2010 annual mean objective in Scotland)?Industrial solid fuel biomass PM10 households 5.22 5.23 coal 21/11/2016
38 None of the screening tools available for stacks (e.g. the HMIP D1 method, nomograms in LAQM.TG(09) 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?Industrial Modelling exit velocity stack building taller D1Height 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
55 If there is a boiler which is not regulated under the PPC/LAPC regime or the Clean Air Act and the nomograms in LAQM.TG(09) suggest an exceedence of the NO2 objective is likely, what controls should a local authority use to tackle emissions?Industrial Boiler no2 nitrogen not regulated exempt planning 21/11/2016
57 There are one or more industrial sources located within my authority area (or adjacent to it) which are permitted by the Environment Agency, SEPA or NIEA under the Environmental Permitting Regulations 2007. As the emissions from these installations are regulated, do they need to be considered as potentially significant sources for review and assessment?Industrial EA Permit regulated DoE SEPA part a processes 21/11/2016
74For PM10 from quarries, is it sufficient to say that if deposit gauge results are below 200 µg/m2/day, then there is no PM10 problem?Pollutant Industrial PM10 quarr fugitive dust 21/11/2016
75 We are an Excellent rated Authority (England only). Do we need to produce an action plan for any newly declared industrial related AQMAs, given that road traffic measures will be included in Local Transport Plans?Industrial AQMA AQAP LTP Transport 21/11/2016
87 Site Location - Where should I try to locate my monitors for investigating emissions from point sources?Monitoring Industrial Location Site Point Exposure 21/11/2016
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
90 When using the nomograms in LAQM.TG(09) for the review and assessment of industrial installations, what should I do if my stack is less than 3 m above the building on which it sits, and does the tallest adjacent building include this building?Industrial Modelling Nomogram Building Stack Chimney 3 meters 3 metres 21/11/2016
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 01/03/2010
100How 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
101How 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
111What is the Supplementary Assistance: Chimney Height Calculation Spreadsheet?Modelling Industrial Pollutant SO2 Stack Chimney Height 01/03/2010
115What sort of uncontrolled and fugitive sources of PM10 should be considered?Industrial Pollutant PM10 Fugitive Uncontrolled Waste 01/03/2010
117When predicting short-term concentrations are there any additional precautions that should be taken, particularly where stack emissions are involved?Industrial chimney Stack hourly short-term short short term 15 minute 21/11/2016
128What assessment should be made to identify the impacts on air quality of biomass boilers?Industrial Modelling Biomass stack chimney 21/11/2016

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