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Annual Report for 2010 on the UK PAH Monitoring and Analysis Network.

Brown, A S; Butterfield, D M; Brown, R J C; Hughey, P; Whiteside, K; Goddard, S L; Williams, M (2011) Annual Report for 2010 on the UK PAH Monitoring and Analysis Network. NPL Report. AS 62

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Abstract

This annual report for 2010 for the UK PAH Monitoring and Analysis Network was prepared by the National Physical Laboratory (NPL) for the Department of Environment, Food and Rural Affairs; the Northern Ireland Department of Environment; the Welsh Government and the Scottish Government. The report contains:

- The measured annual (and where applicable, monthly or quarterly) concentrations of benzo[a]pyrene (B[a]P) at each Network site, and at each TOMPs Network site.
- Selected results from other PAHs at selected Network sites.
- An overview of the PAH Network, including a summary of Network operation, a description of notable site maintenance issues and changes to the Network during 2010, and data capture statistics for 2010.
- A comparison of the B[a]P annual mean concentrations against the target values in EC Air Quality Directives.
- A comparison of the performance of Network operation against the relevant data quality objectives in EC Air Quality Directives.
- A review of the sources of PAHs in the UK.
- Results from a comparison between Andersen and Digitel samplers at two Network sites
- A discussion of PAH concentration trends across the Network, and the relationship between PAH emissions and measured concentrations.
- A summary of scientific research, international representation and other activities related to the Network.

In summary, during 2010:

- The EC target value for B[a]P (an annual average concentration of 1.0 ng.m-3) was exceeded at seven of the 33 sites where Digitel (particulate only or particulate + vapour) samples were taken.
- The UK air quality objective for B[a]P (an annual average concentration of 0.25 ng.m-3) was exceeded at 20 of these 33 sites.
- The average annual data capture for 31 sites where Digitel particulate samples were taken was 84 %.
- The annual mean B[a]P concentrations for 2010 show very little variation to those from 2007-2009 (inclusive). This observation is unsurprising considering the relatively constant levels of B[a]P emissions over the same time period.
- The comparison of Andersen and Digitel samplers at the Scunthorpe Town and Harwell sites concluded. Over the course of the intercomparison, the B[a]P concentration ratio for the Digitel : Andersen data was determined to be 2.12 at the Scunthorpe Town site and 1.60 at the Harwell site. These results should provide Defra with some confidence that results produced by the Network since the Digitel samplers were installed in 2007 are more likely to be reporting the actual concentrations of PAHs in ambient air.

Item Type: Report/Guide (NPL Report)
NPL Report No.: AS 62
Keywords: PAHs, Network, air quality, ambient air, Defra
Subjects: Analytical Science
Analytical Science > Trace Analysis and Electrochemistry
Last Modified: 23 Jul 2018 10:43
URI: http://eprintspublications.npl.co.uk/id/eprint/5211

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