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Report Category: Air Quality Assessment

Volatile Correction Model

TEOM VCM Correction King’s College Environmental Research Group (ERG) have developed a model to correct TEOM concentrations to “gravimetric equivalent” values, based on the purge

Annualisation of Diffusion Tubes

Overview The process of annualisation allows for annual mean pollutant concentrations to be estimated from extrapolation of short-term monitoring results. This annualisation tool has been

Diffusion Tubes Overview

Why Use Diffusion Tubes Diffusive samplers (as described in paragraphs 7.197 – 7.210 of the Technical Guidance LAQM.TG(22)) are widely used for indicative monitoring of ambient

Practical Guidance: NO2 Diffusion Tubes for LAQM

Overview Defra and the Devolved Administrations commissioned a Working Group, comprising representation from Defra and the Devolved Administrations, laboratories, the Health and Safety Laboratory, the

Local Bias Adjustment Factors

Overview Many local authorities are now carrying out diffusion tube co-location studies. A spreadsheet has been developed to assist diffusion tube users in calculating the