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8.

Nitrogen Dioxide (NO2)

8.1

Conclusions of Phase 1 Review and Assessment

No industrial processes were identified as potential sources of NO2 emissions during the Council’s Stage 1 Review and Assessment. A number of roads were identified with average daily flows exceeding 20,000 vehicles, therefore requiring further assessment during the first round of Review and Assessment. A simple modelling assessment using the DMRB was

undertaken potentially assessment

at Stage 2. The assessment concluded that predicted concentrations in 2005 would

exceed the AQOs for was therefore required

NO2 in central Newbury

at

Stage

3.

The

Stage

and close to 3 assessment

the M4

further

utilised

detailed

modelling software and concluded that it was unlikely for the AQOs to be exceeded of relevant exposure long the M4, A4 and A34. An AQMA was not declared.

at

locations

8.2

Estimated and Monitored Data

Estimated annual mean background NOx and NO2 concentrations have been compiled and

mapped for the UK on a 1 km x 1 km basis5.

Details

concentrations in the West Berkshire region are detailed in Tables 8.1 and 8.2 below.

during

2001,

2005

of and

background NOx and NO2 2010 have been collated and

Table 8.1

Estimated annual mean background concentrations – NOx (µg/m3)

Year

Maximum

Minimum

Mean

2001

64.80

20.30

35.52

2005

54.90

17.00

29.06

2010

52.40

13.50

22.44

Year

Maximum

Minimum

Mean

AQO

2001

34.10

15.40

22.42

-

2005

30.50

13.30

19.53

40

2010

29.50

10.60

16.25

40

Table 8.2

Estimated annual mean background concentrations – NO2 (µg/m3)

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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