Table 20.9 Definitions of the Different Sensitivity Levels for Receptors to Construction Dust


Sensitivity Sensitivity of People to Dust Soiling


High


Dwellings, museums and other culturally important collections, medium and long-term car parks and car showrooms


Medium Parks, places of work


Sensitivity of People to the Health Effects of PM10


Residential properties, hospitals, schools and residential care homes


Office and shop workers not occupationally exposed to PM10


Low


Playing fields, farmland, footpaths, short-term car parks and roads


20.4.3.1.2Magnitude 35.


Public footpaths, playing fields, parks and shopping streets


Sensitivity of Ecological Receptors


International or national designation and features affected by dust soiling or locations with dust- sensitive species


Locations with important plant species or national designation with features affected by dust soiling


Local designation where features may be affected by dust deposition


The magnitude of construction phase dust emissions should be defined for each type of activity. These are broken down into four categories: demolition, earthworks, construction and trackout. The dust emission magnitudes can either be small, medium or large and are dependent on the methods of work undertaken and the scale of the activity. The dust emission magnitudes for each activity are detailed in Table 20.10.


Table 20.10 Definitions of the Different Magnitudes of Construction Phase Dust Emission Activity


Small Earthworks Construction Trackout


Criteria used to Determine Dust EmissionMagnitude Medium


Total site area <2,500m2.


Total building volume <25,000m3.


<10 outward Heavy Goods Vehicle (HGV) trips in any one day.


Unpaved road length <50m.


20.4.3.1.3 Significance 36.


Total site area 2,500 – 10,000m2.


Total building volume 25,000 – 100,000m3.


10-50 outward HGV trips in any one day.


Unpaved road length 50- 100m.


Large


Total site area >10,000m2.


Total building volume >100,000m3.


>50 outward HGV trips in any one day.


Unpaved road length >100m.


The dust emission magnitude should be combined with the sensitivity of the area to determine the risk of impacts prior to mitigation. This is shown in more detail in Appendix 20.1. Once appropriate mitigation measures have been identified, the


Preliminary Environmental Information May 2014


East Anglia THREE Offshore Windfarm


Chapter 20 Air Quality Page 14


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