Formation London Clay Formation Clay Harwich Formation
Clay
Lambeth Group and Thanet Sand Formation Clay, sand and silt
Chalk Formation Chalk
Unproductive Strata Unproductive Strata
Secondary A aquifer Principal Aquifer
19.5.2.2 Groundwater Abstractions 63. Details on abstraction licenses and groundwater condition are discussed in Chapter 21 Water Resources and Flood Risk. However, it should be noted that three Groundwater Source Protection zones (SPZs) (Zone 1) are crossed by the onshore electrical transmission works at Playford (circa Grid Ref 6210,2480), Akenham (circa Grid Ref 6150,2490) and north of Bramford (circa Grid Ref 6211,2475) (see Figures 21.2 - 21.4). The remainder of the onshore electrical transmission works to the west of Great Bealings lies within an Outer zone (Zone 2). There are no SPZs to the east of Woodbridge. These zones are identified to protect active water abstraction points from the impact of contaminative sources. Zone 1 represents a 50 day travel time to the abstraction and Zone 2 is defined by a 400 day travel time.
19.5.3 Potentially Contaminated Sites
19.5.3.1 Potentially Contaminative Land Uses 64. A desk based study carried out by RSK in 2011 (Appendix 19.1) commissioned an Envirocheck environmental sensitivity report and consulted with MSDC with regards to sources of potential contamination within the study area. This identified that no sites within the study area were recorded on MSDCs Contaminated Land Register. Subsequent consultation with MSDC and SCC confirmed that there have been no changes to the 2011 data within the RSK report (See Table 19.1). Key features within 1km of the onshore electrical transmission route including access with potential pollutant linkages were identified within the RSK report (refer to Table 6 in Appendix 19.1) and are presented in Figure 19.6. A summary of the information within 250m of the onshore electrical transmission route including access are presented in Table 19.14 below:
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 19 Soils, Geology and Ground Condition Page 28
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