This page provides tools to assist local authorities with the Review and Assessment process. The tools are available to download in a variety of file formats. Some basic information about how to download files and the different file formats supported is available.
The following tools are currently available. Please note many of the links below will link to external websites, which open in a new window.
UK background pollution maps and associated tools are available for download.
A database of bias adjustment factors for local authorities to use to correct their diffusion tube measurements is available. If local authorities have their own co-location studies and do not wish to use the factors provided in the database above, they may calculate their own bias adjustment factor. A spreadsheet has been designed to assist with this. The spreadsheet calculates the precision and accuracy (bias) of individual co-location studies and gives 95% confidence intervals in the bias adjustment calculations..
King's College ERG have developed a new model to correct TEOM concentrations to "gravimetric equivalent" values, based on the purge concentrations measured by FDMS analysers. To assist local authorities with the Volatile Correction Model, ERG has developed a web portal that will allow the correction algorithms to be automatically applied.
This calculator allows local authorities to derive NO2 from NOx wherever NOx is predicted by modeling emissions from roads. The calculator can also be used to calculate the road component of NOx from roadside NO2 diffusion tube measurements.
It incorporates the impact of expected changes in the fraction of NOx emitted as NO2 (f-NO2) and changes in regional concentrations of NOx, NO2 and O3.
The following files may be of interest:
Important: Please save these files to a local drive before using by right-clicking the link and choosing Save Target As... or Save Link As..., it may not function correctly if opened directly from the link in your browser window.
The Design Manual for Roads and Bridges (DMRB) Screening Model published by the Highways Agency can be used for Review and Assessment purposes. A revised version of this model is expected to be issued during 2009. Until this is published, these instructions should be followed They explain where the model can be found and how it should be used.
A suite of tools are available to help local authorities assess their local emissions.
A calculator has been produced which estimates the annual mean nitrogen dioxide concentration at one distance from a road, using measurements made at a different distance from the same road.
A chimney height calculation spreadsheet for sulphur dioxide emissions from small boilers is available. Download the spreadsheet (XLS 80KB).
Also, a report giving supplementary assistance on stack height determination in relation to sulphur dioxide emissions from small boilers can be downloaded Supplementary Assistance on Stack Height Determination (PDF 50KB).
Frequently Asked Question giving guidance on assessing emissions from railway locomotives (PDF).
Defra and the Devolved Administrations will be moving to web-based reporting for Progress Reports and USAs from 2009. This will provide a uniform on-line template which will enable both the production and appraisal of these reports to be carried out in a much simpler manner. Register on the web-based reporting website.
This report (PDF) provides an updated analysis of the relationship between the annual mean and the number of exceedences of the 1-hour objective for nitrogen dioxide. It is intended to confirm whether the existing relationship still holds. Such a relationship is useful for Local Authorities who are monitoring annual mean NO2 concentrations using diffusion tubes, or who wish to estimate the likelihood of the 1-hour objective being exceeded from modelling studies. Monitoring data have been analysed from a multiple network base of around 200 monitoring sites across the UK. This report is supplementary to the LAQM Technical Guidance (09).
Since the publication of LAQM.TG(03), the Derivation of Screening Criteria for Review and Assessment of Airports - 2008 Update (PDF) report related to the air quality impacts of airport operations has become available, and it is now appropriate to review these threshold criteria in light of this new information. This analysis has helped to formulate the updated guidance to be published in LAQM.TG(09).
Biomass calculators (XLS) are available for download. The Technical Guidance: Screening assessment for biomass boilers (PDF) report is also available, which provides background information on methods of assessing the impact of biomass combustion appliances on air quality as set out in LAQM.TG(09).