Use of dust suppressants

Meeting: 
MQT on 2012-01-25
Session date: 
January 25, 2012
Reference: 
2012/0283
Question By: 
Mike Tuffrey
Organisation: 
Liberal Democrats
Asked Of: 
The Mayor

Question

Will you review the number of locations where dust suppressant technology is used in light of provisional data recorded by the London Air Quality Network (LAQN) which shows that the daily mean PM10 objective was exceeded at eleven separate sites during 2011?

Answer

Answer for Use of dust suppressants

Answer for Use of dust suppressants

Answered By: 
The Mayor

The Clean Air Fund has enabled expansion of the local air quality measures, including application of dust suppressants. As a result, in 2011/12 dust suppressants are being applied at nine of the ten locations (two sites are in Marylebone Road) that had more than 35 days over the 50ug/m3 PM10 EU limit value.

It is worth noting that the high levels of PM10 observed in early 2011 across London and the South East were the result of external sources creating pollution. As this pollution comes from outside of London, dust suppressants are not an effective mitigation against these episodes.

To ensure that any future application of dust suppressants is optimised to improve air quality while providing value for money, Kings College and URS are undertaking detailed monitoring and analysis of the 2011/12 programme.