Results of initial research – Phase 0 Eskdalemuir Working Group 16 th Aug 2013 Dr Mark-Paul Buckingham

Introduction  Identification of quietest site at Craig Wind Farm  Representative seismic spectra  Application of Frequency-dependant weighting (FDW) to representative spectra and comparison to 2005 Budget prediction  Factor of over-estimate by 2005 Budget with respect to distance from EKA  Prospect of headroom in the Budget

Sensor selection  Modelled background noise by examining narrow bands between blade-pass frequencies  The quietest sites were:  6351 / AEG-5  6099 / AEG -2b  This correlates with the analysis of Dr Bowers

Representative spectra  Take the spectral interquartile mean of all data with wind speed in the11-12 ms -1 range  Result correlates well with that of Dr Bowers  6099 / AEG-2b

Representative spectra  Take the spectral interquartile mean of all data with wind speed in the11-12 ms -1 range  Result correlates well with that of Dr Bowers  6351 / AEG-5

Over-estimate factor  The frequency dependent weighting function (FDW) to representative spectra  FDW contains a distance term, so the over-estimate is distance dependent

Prospect for head-room – nm threshold Table 1 MoD figures are per September 2012 figuresRe-calculation based on 6351/AEG-5 Wind Farm Name Developer or Applicant Number of turbines Installed capacity per turbine (MW) Total Power Generated (MW) Average turbine distance (km) MoD amplitude based on 30th September 2012 figures Cumulative amplitude MoD 30th Sept 2012 (nm) Delta - budget multiplier Amplitude after delta multiplier (nm) Re-calculated umulative amplitude (nm) BowbeatE.ON Carlesgill (Craig)CWF Ltd Halkburn (Long Park)Wind Prospect ClydeAirtricity EarslhaughWind Energy North of midtown farmMr Brown E E

Conclusions  Results support finding of Dr Bowers, high correlation in results  The 2005 Budget over-estimates the amplitude of seismic ground vibration produced by wind turbines  The over-estimate is depends on the distance from EKA. It varies between:  Over-estimate by a factor of 10 for turbines 10 km from EKA  Over-estimate by a factor of 1.2 for turbines 50 km from EKA  If the turbines at Craig Wind Farm are representative of other turbine in the consultation zone then is a likelihood of significant prospective head room that would allow the building of further wind turbine without breaching the nm threshold.