Full Report - Sustainable Aggregates

CR/07/042N
Figure 19 Clipping of the resource polygons
BGS © NERC. Ordnance Survey topographic material © Crown Copyright. All rights reserved.
Of the remaining polygons, the geologist manually chose which to target. This decision was
made based on a number of parameters, such as reassessment of the borehole data, the type of
deposit at surface and the size of the polygon. Finally, of the final 38 chosen polygons, the
geologist highlighted the optimum areas within them to drill. This was based on:
1) Elevation (mostly favouring higher elevation as this provides potential to reveal thicker
Quaternary deposits)
2) Existing borehole data (where any existing boreholes are within the polygon and the data
they provide)
3) Access (roads and tracks)
4) Settlements (as far from farms and villages as possible due to noise pollution).
Geologists identified a total of 49 optimum borehole locations within the final 38 polygons.
8.4.1 Services and Access
The landowners for each of the 49 optimum sites were approached, and access was gained for 43
boreholes. Five boreholes were re-drilled close to original borehole sites, giving the final total of
48. Whilst gaining written confirmation from the landowners, service checks were carried out on
each of the sites with the service providers listed in Table 11.
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