Butterfield, D; Whiteside, K; Quincey, P (2009) UK non-automatic hydrocarbon network: Annual report for 2008. NPL Report. AS 44

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Abstract

This report summarises operational matters and the data obtained by the Non-Automatic Hydrocarbon Network in the year 2008.

The background, methods used and site locations are given in Sections 1 and 2. The restructuring of the Network for benzene that started in 2007 was completed in 2008, with several further site changes. 1,3-butadiene measurements within the Network stopped during 2007.

Annual average data for benzene, and data capture, are given in Section 3. No sites exceeded the European Union Limit Value or the UK Air Quality Objectives for benzene.

No notable episodes or anomalous measurements were observed during the year.

Section 4 examines long term trends for benzene and compares them with the trends expected from the UK National Atmospheric Emissions Inventory. Trends in concentration over the period 1994 to 2002 are significantly downward and agree well between the two data sets. Trends in benzene since 2002 are generally downward, especially at sites measuring higher concentrations.

Comparability with data from the Automatic Hydrocarbon Network and other sources are discussed.

Sections 5 and 6 provide some information relating to measurements and modelling near South Killingholme in Humberside, and measurements made outside of the Network near an industrial source in Derby.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	AS 44
Subjects:	Environmental Measurement
Last Modified:	02 Feb 2018 13:15
URI:	http://eprintspublications.npl.co.uk/id/eprint/4487

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