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8.2.1

Local Monitoring Data

WBC has undertaken ambient monitoring of NO2 concentrations using passive diffusion tubes, annual mean concentrations, monitored in 2002, are detailed in Table 8.3.

The diffusion tubes are supplied and analysed by Gradko International Ltd who take part in the

UK NO2 diffusion tube laboratory inter-comparison continuous real-time monitors has not been undertaken the monitored concentrations.

scheme. However, and it is therefore not

co-location with possible to verify

Table 8.3

West Berkshire Diffusion Tube Monitoring Data (µg/m3)

Location

Location

20021

20052

20102

A339 Greenham Road

Roadside

27.21

24.27

19.97

A339 Ambulance Station, Western Avenue

Roadside

25.41

31.58

25.99

A339 Willows Edge, Hutton Close

Roadside

22.95

20.47

16.84

A4 London Road

Roadside

34.99

31.21

25.68

Notes:

1.

Diffusion tubes exposed over mid month to mid month periods. Annual mean calculated from mid January 2002 to mid January 2003.

2.

Estimated future concentrations using LAQM.TG(03).

A4 82 Chapel Road

Roadside

31.16

27.79

22.87

The monitored concentrations indicate that none of the roadside locations recorded an annual mean concentration above the annual mean AQO of 40 µg/m3 in 2002. Estimated annual means in 2005 and 2010 are not expected to exceed the AQO criteria.

8.2.2

National Monitoring Data

Data from the UK AURN site of Reading has been collated. The Reading site is located approximately 38 km east of Newbury and is classified as urban background. The Reading site

has been chosen to reflect the concentrations potentially experienced within West Berkshire. Concentrations of NOx and NO2 monitored during concentrations estimated using Defra guidance, are shown in Table 8.5.

urban 2001

locations in and future

h:\projects\em-260\10000 projects\10151 aq w.berks r&a - phase 2\d design\reporting\10151 aq final u&sa.doc10151-01

May 2003

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