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Criteria

AQO

2001

20041

20101

Maximum 24 hour mean

50

70

-

-

Number of exceedences

35

8

-

-

Annual mean

40 (20)

16

15.63

14.82

Notes: Concentrations reported as Gravimetric equivalent.

1

Calculated using Defra guidance LAQM.TG(03)

10.3 Emission Sources

Table 10.2

28

Continuous PM10

monitoring data from Reading (µg/m3)

10.3.1

Road Transport

Road traffic data has been provided by WBC and are detailed in Appendix A. Guidance specifies that narrow, congested streets, ‘busy’ junctions (>10,000 vehicles per day) and roads with a high percentage of HGVs are considered to be more significant in terms of potential exposure.

WBC has provided detailed mapping and this has been reviewed, in consultation with the Council, to identify potential areas of congestion, elevated exposure and bus routes. A Stage 3 assessment of the M4, A4 and A339 was undertaken for PM10, the assessment concluded that the AQOs were unlikely to be exceeded at locations of relevant exposure.

The requirement to undertake a DMRB screening model or Detailed assessment, has been investigated using the road traffic information spreadsheet provided in support of the LAQM guidance.

Details of traffic flows, background concentrations, junctions and distance of receptors from the road have been input in the road traffic information spreadsheet shown in Appendix C. The spreadsheet identifies the potential requirement for undertaking a screening assessment using the DMRB or a Detailed assessment.

No requirement to undertake a DMRB or Detailed assessment of PM10 was identified.

10.3.2 Industrial

Defra guidance lists the significance of industrial sources, by process type, as a percentage of the total Part A emissions in 2000 and Part B process types that are considered likely to emit significant emissions.

Appendix B details Part A and Part B industrial sources identified in the Council’s Stage 1 report. Consultation with WBC has identified that no further sources have been permitted or planned within the authority, since compilation of the data during the first round of assessments.

From a review of this information, the SEPG and Coldthrop Board Mill, Part A processes, were identified as potentially significant sources of PM10.

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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