Pollutant Objectives, however, incorporate target dates and averaging periods which take into account economic considerations, practicability and technical feasibility.


23. Where an air quality Objective is unlikely to be met by the relevant deadline, local planning authorities must designate those areas as Air Quality Management Areas (AQMAs) and take action to work towards meeting the Objectives. Following the designation of an AQMA, local planning authorities are required to develop an Air Quality Action Plan (AQAP) to work towards meeting the Objectives and to improve air quality locally.


24.


Possible exceedences of air quality Objectives are usually assessed in relation to those locations where members of the public are likely to be regularly present and are likely to be exposed for a period of time appropriate to the averaging period of the objective.


Table 20.5. Air Quality Strategy Objectives (England) for the Purposes of LAQM Pollutant


Air Quality Objective Concentration


Benzene 1,3 Butadiene 5 μg.m-3 2.25 μg.m-3 Carbon Monoxide (CO) 10 mg.m-3 Lead 0.25 μg.m-3 Nitrogen Dioxide (NO2) 200 μg.m-3 Particles (PM10)


40 μg.m-3 50 μg.m-3


Measured as* Annual mean


Running annual mean


Maximum daily running 8-hour mean


Annual Mean


1 hour mean not to be exceeded more than 18 times per year


Annual mean


24-hour mean not to be exceeded more than 35 times per year


Particles (PM2.5)


40 μg.m-3 25 μg.m-3


15% cut in annual mean (urban background exposure)


Sulphur Dioxide (SO2) 350 μg.m-3 Annual mean


Annual mean (target) 2010 - 2020


To be Achieved By


31/12/2010 31/12/2003 31/12/2003


31/12/2008 31/12/2005


31/12/2005 31/12/2004


31/12/2004 2020


1-hour mean not to be exceeded more than 24 times a year


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


31/12/2004


Chapter 20 Air Quality Page 8


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48