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FUGRO ENGINEERING SERVICES LIMITED
AIRTRICITY HOLDINGS LIMITED
VIKING WIND FARM PEAT STABILITY ASSESSMENT
DRAFT FACTUAL REPORT ON
GROUND INVESTIGATION CONTRACT NO : CON083141 DATE : JANUARY 2009
CONFIDENTIAL
FUGRO ENGINEERING SERVICES LIMITED
AIRTIRICITY HOLDINGS LIMITED
VIKING WIND FARM PEAT STABILITY ASSESSMENT
DRAFT FACTUAL REPORT ON
GROUND INVESTIGATION CONTRACT NO : CON083141 DATE : JANUARY 2009
CONFIDENTIAL
REPORT ISSUE STATUS Issue Date Description Prepared Checked Approved
(Printed) Approved
(Signature)
01 20/01/09 Draft Factual BC ND
B COOPER N DAVIES PRINCIPAL ENGINEER ENGINEERING MANAGER
Fugro Engineering Services Limited
Armstrong House, Unit 43 Number One Industrial Estate
Consett County Durham, DH8 6TW
Registered in England No. 1891562. VAT No. GB 537 7608 16 A member of the Fugro Group of companies with offices throughout the world. REV 05 17/11/2008
AIRTRICITY HOLDINGS LIMITED VIKING WIND FARM
1. INTRODUCTION 1
2. THE SITE AND GEOLOGY 1 2.1 SITE LOCATION AND DESCRIPTION 1 2.2 GEOLOGY 1
3. METHOD OF INVESTIGATION 2 3.1 GENERAL 2 3.2 FIELD TESTING 2 3.3 SURVEY 2 3.4 LIMITATIONS AND USE OF DATA 2
REFERENCES 4
APPENDIX A Field Test Results
APPENDIX B Drawings
Contract No: CON083141 Table of Contents Page i of i
AIRTRICITY HOLDINGS LIMITED VIKING WIND FARM
1. INTRODUCTION
On the instructions of Mouchel Limited (the Engineer), acting on behalf of Airtricity Holdings Limited (the Employer), a site investigation has been carried out by Fugro Engineering Services Limited (FES) on the north mainland of Shetland on the site of the proposed Viking Wind Farm. The objective of the investigation was to provide the Engineer with additional insitu strength properties for use in a peat stability assessment of the site. The scope of the investigation was determined by the Engineer with the agreement of the Employer. A factual report was requested including field testing records and a site plan. The report has also been provided in .pdf format. The site work, which comprised insitu field vane testing and peat probing at fifteen locations, was carried out between the 15th December 2008 and the 9th January 2009.
2. THE SITE AND GEOLOGY
2.1 SITE LOCATION AND DESCRIPTION
The site is located across two distinct areas on the northern mainland of Shetland. The southern area extends from Flaminster in the southeast (HU 441 559) to Weisdale in the southwest (HU 383 523) and extends to Hamarigrind Scord (HU 408 608) in the north. The northern area is centered around Duddin Hill (HU 384 669) and Easterscord (HU 420 660) and east of Meadow of Fitchin (HU 404 704). At the time of the investigation the site comprised heather and grass moorland underlain by varying depths of peat.
2.2 GEOLOGY
The records of the British Geological Survey (GeoIndex Digital Data - 1:625,000 Superficial and Bedrock) indicate that the site is underlain by Peat over Undifferentiated Schist and Gneiss of Shetland and Upper Tyrone. Further background research such as a desk study was not required within the terms of reference for the work.
Contract No: CON083141 Main Text Page 1 of 4
AIRTRICITY HOLDINGS LIMITED VIKING WIND FARM
3. METHOD OF INVESTIGATION
3.1 GENERAL
Details of the in-situ testing carried out, together with the peat thicknesses encountered, are given on the field records in Appendix A. The investigation was generally carried out in accordance with BS 5930:1999i, BS EN ISO 14688-1:2002ii and BS EN ISO 14689-1:2003iii as appropriate.
3.2 FIELD TESTING
A total of eighty five field vane tests were carried out at fifteen locations as specified by the Engineer using a Farnell Field Vane. The results, with the vane and dial gauge factors, are given in Table 1 in Appendix A. The maximum thickness of peat was also determined at each test location by hand probing. The results are given in Table 2 in Appendix A.
3.3 SURVEY
The test locations were set out using the Global Positioning System (GPS) technique with co-ordinates supplied by the Engineer. The ground levels and grid co-ordinates at the test locations were not requested. Site plans provided by the Engineer showing the approximate positions of the test locations are presented in Figures LP1 and LP2 in Appendix B.
3.4 LIMITATIONS AND USE OF DATA
The scope of the investigation was determined by the Engineer for the particular project requirements set out in the Specification for the Contract. A factual report only was required, without interpretation of the data from the present investigation or consideration of data from other sources, except where noted. The data presented in this report reflects the site conditions encountered at the time the investigation was performed. The investigation has disclosed evidence of conditions at point locations across the site which provides information about discrete volumes of soil or rock. Accordingly, there may be ground conditions at the site which may not have been revealed by the investigation, and the passage of time may give rise to changes in the conditions encountered. Any interpolation or extrapolation of strata from the exploratory holes is subject to the interpretation of the reader. Any cross - sections or plots are generalised by necessity and have been based on information found at the exploratory holes and depths sampled and tested. The records should be read in conjunction with the Notes on Exploratory Hole Records in Appendix A. Particular attention is drawn to the comments made on groundwater and interpretation which are given in these Notes.
Contract No: CON083141 Main Text Page 2 of 4
AIRTRICITY HOLDINGS LIMITED VIKING WIND FARM
The investigation has been carried out by Fugro Engineering Services Limited and the report has been prepared for the sole internal use of Airtricity Holdings Limited. This report shall not be relied upon or transferred to any other parties without the express written authorisation of Fugro Engineering Services Limited. If an unauthorised third party comes into possession of this report they rely upon it at their peril and the authors owe them no duty of care and skill. It is Fugro Engineering Services Limited’s understanding that this report is to be used for the purposes as described in the Specification for the investigation and as summarised in the text of the report. Should the purpose for which the report is used or the proposed use of the site change, this report may no longer be valid. Any further use or reliance upon the report in these circumstances by Airtricity Holdings Limited without further review by and advice from Fugro Engineering Services Limited shall be at their sole and own risk.
Contract No: CON083141 Main Text Page 3 of 4
AIRTRICITY HOLDINGS LIMITED VIKING WIND FARM
REFERENCES
TP
TP
i BS 5930:1999, Code of practice for site investigations. British Standards Institution. ii BS EN ISO 14688-1:2002 Geotechnical investigation and testing – Identification and classification of soil – Part 1 Identification and description. British Standards Institution. iii BS EN ISO 14689-1:2003 Geotechnical investigation and testing – Identification and classification of rock – Part 1 Identification and description. British Standards Institution.
Contract No: CON083141 Main Text Page 4 of 4
AIRTRICITY HOLDINGS LIMITED VIKING WIND FARM
APPENDIX A Field Test Results
Insitu Field Vane Test Results Table 1 Peat Probe Test Results Table 2
Contract No: CON083141 Appendix A Contents Page
AIR
TRIC
ITY
HO
LDIN
GS
LIM
ITE
DV
IKIN
G W
IND
FA
RM
Bor
ehol
eH
ole
Dep
thC
asin
g D
epth
Van
e Ti
p D
epth
Wat
er
Leve
lV
ane
Siz
eR
od
Fric
tion
Pea
k R
eadi
ngR
od
Fric
tion
Rem
ould
re
adin
gFa
ctor
Pea
k V
alue
Rem
ould
va
lue
Sen
sitiv
ityV
ane
Con
stan
t
Pea
k S
hear
kP
a)
Rem
ould
ed
She
ar
(kP
a)1
0.00
n/a
0.60
0.00
200
x 10
027
465
2215
80.
092
40.3
12.5
3.2
3.65
311
.030
933.
4251
31
0.00
n/a
0.60
0.00
200
x 10
09
403
512
10.
092
36.2
10.7
3.4
3.65
39.
9228
032.
9214
344
10.
00n/
a0.
600.
0020
0 x
100
255
610
155
0.09
251
.013
.33.
83.
653
13.9
5237
3.65
1793
10.
00n/
a1.
600.
0020
0 x
100
5741
178
218
0.09
232
.612
.92.
53.
653
8.91
5412
3.52
5869
11
0.00
n/a
1.60
0.00
200
x 10
022
364
213
80.
092
31.5
12.5
2.5
3.65
38.
6131
953.
4251
31
0.00
n/a
1.60
0.00
200
x 10
091
467
8520
90.
092
34.6
11.4
3.0
3.65
39.
4694
773.
1229
127
20.
00n/
a0.
600.
0020
0 x
100
5592
547
251
0.09
280
.018
.84.
33.
653
21.9
1076
5.13
7695
20.
00n/
a0.
600.
0020
0 x
100
4159
048
210
0.09
250
.514
.93.
43.
653
13.8
2644
4.07
9934
32
0.00
n/a
0.60
0.00
200
x 10
059
659
4020
50.
092
55.2
15.2
3.6
3.65
315
.110
874.
1554
886
30.
00n/
a0.
600.
0020
0 x
100
232
01
190.
092
29.3
1.7
17.7
3.65
38.
0087
60.
4533
263
0.00
n/a
0.60
0.00
200
x 10
042
1210
2437
90.
092
107.
532
.73.
33.
653
29.4
1582
8.94
0596
83
0.00
n/a
0.60
0.00
200
x 10
078
750
6121
90.
092
61.8
14.5
4.3
3.65
316
.924
173.
9791
952
40.
00n/
a0.
600.
0020
0 x
100
4113
7042
281
0.09
212
2.3
22.0
5.6
3.65
333
.470
576.
0191
623
40.
00n/
a0.
600.
0020
0 x
100
7310
6168
242
0.09
290
.916
.05.
73.
653
24.8
8256
4.38
2151
74
0.00
n/a
0.60
0.00
200
x 10
067
1005
6421
50.
092
86.3
13.9
6.2
3.65
323
.623
323.
8029
017
40.
00n/
a1.
600.
0020
0 x
100
6823
042
109
0.09
214
.96.
22.
43.
653
4.07
9934
1.68
7380
24
0.00
n/a
1.60
0.00
200
x 10
00
130
012
20.
092
12.0
11.2
1.1
3.65
33.
2740
213.
0725
431
40.
00n/
a1.
600.
0020
0 x
100
9710
4384
365
0.09
287
.025
.93.
43.
653
23.8
248
7.07
6923
14
0.00
n/a
2.60
0.00
200
x 10
081
528
7920
40.
092
41.1
11.5
3.6
3.65
311
.257
63.
1480
975
40.
00n/
a2.
600.
0020
0 x
100
7935
570
147
0.09
225
.47.
13.
63.
653
6.95
0999
1.93
9228
40.
00n/
a2.
600.
0020
0 x
100
121
494
108
225
0.09
234
.310
.83.
23.
653
9.39
3923
2.94
6619
2
50.
00n/
a0.
600.
0020
0 x
100
5810
4252
262
0.09
290
.519
.34.
73.
653
24.7
8182
5.28
8803
75
0.00
n/a
0.60
0.00
200
x 10
046
1242
5436
20.
092
110.
028
.33.
93.
653
30.1
217.
7569
121
50.
00n/
a0.
600.
0020
0 x
100
3512
8248
356
0.09
211
4.7
28.3
4.0
3.65
331
.405
427.
7569
121
50.
00n/
a1.
600.
0020
0 x
100
9710
4384
365
0.09
287
.025
.93.
43.
653
23.8
248
7.07
6923
15
0.00
n/a
1.60
0.00
200
x 10
014
867
412
729
10.
092
48.4
15.1
3.2
3.65
313
.247
194.
1303
039
50.
00n/
a1.
600.
0020
0 x
100
9780
587
315
0.09
265
.121
.03.
13.
653
17.8
3082
5.74
2129
8
60.
00n/
a0.
600.
0020
0 x
100
1134
81
590.
092
31.0
5.3
5.8
3.65
38.
4872
711.
4607
172
60.
00n/
a0.
600.
0020
0 x
100
778
517
216
0.09
271
.618
.33.
93.
653
19.5
9376
5.01
1771
16
0.00
n/a
0.60
0.00
200
x 10
014
949
2619
20.
092
86.0
15.3
5.6
3.65
323
.547
774.
1806
734
70.
00n/
a0.
600.
0020
0 x
100
6494
467
256
0.09
281
.017
.44.
73.
653
22.1
6261
4.75
9923
47
0.00
n/a
0.60
0.00
200
x 10
072
879
8332
70.
092
74.2
22.4
3.3
3.65
320
.324
126.
1450
862
70.
00n/
a1.
600.
0020
0 x
100
121
705
107
267
0.09
253
.714
.73.
73.
653
14.7
0791
4.02
9564
77
0.00
n/a
1.60
0.00
200
x 10
013
865
896
254
0.09
247
.814
.53.
33.
653
13.0
9609
3.97
9195
27
0.00
n/a
2.60
0.00
200
x 10
011
958
811
833
10.
092
43.1
19.6
2.2
3.65
311
.811
665.
3643
581
70.
00n/
a2.
600.
0020
0 x
100
108
611
121
344
0.09
246
.320
.52.
33.
653
12.6
6794
5.61
6205
97
0.00
n/a
3.60
0.00
200
x 10
064
956
174
418
0.09
282
.122
.43.
73.
653
22.4
6482
6.14
5086
27
0.00
n/a
3.60
0.00
200
x 10
072
923
186
379
0.09
278
.317
.84.
43.
653
21.4
3225
4.86
0662
5
80.
00n/
a0.
600.
0020
0 x
100
7256
915
140
0.09
245
.711
.54.
03.
653
12.5
1684
3.14
8097
58
0.00
n/a
0.60
0.00
200
x 10
051
505
8221
40.
092
41.8
12.1
3.4
3.65
311
.433
893.
3243
909
80.
00n/
a0.
600.
0020
0 x
100
2651
99
144
0.09
245
.412
.43.
73.
653
12.4
161
3.39
9945
38
0.00
n/a
1.20
0.00
200
x 10
045
367
1586
0.09
229
.66.
54.
53.
653
8.10
9499
1.78
8119
48
0.00
n/a
1.20
0.00
200
x 10
098
266
312
80.
092
15.5
11.5
1.3
3.65
34.
2310
433.
1480
975
80.
00n/
a1.
200.
0020
0 x
100
2234
28
840.
092
29.4
7.0
4.2
3.65
38.
0591
291.
9140
433
Tabl
e 1
In-s
itu F
ield
Van
e Te
st R
esul
ts
CO
N08
3141
AP
PE
ND
IX A
AIR
TRIC
ITY
HO
LDIN
GS
LIM
ITE
DV
IKIN
G W
IND
FA
RM
Bor
ehol
eH
ole
Dep
thC
asin
g D
epth
Van
e Ti
p D
epth
Wat
er
Leve
lV
ane
Siz
eR
od
Fric
tion
Pea
k R
eadi
ngR
od
Fric
tion
Rem
ould
re
adin
gFa
ctor
Pea
k V
alue
Rem
ould
va
lue
Sen
sitiv
ityV
ane
Con
stan
t
Pea
k S
hear
kP
a)
Rem
ould
ed
She
ar
(kP
a)9
0.00
n/a
0.60
0.00
200
x 10
056
452
5513
00.
092
36.4
6.9
5.3
3.65
39.
9731
731.
8888
585
90.
00n/
a0.
600.
0020
0 x
100
7145
651
141
0.09
235
.48.
34.
33.
653
9.69
614
2.26
6630
29
0.00
n/a
0.60
0.00
200
x 10
059
494
5916
10.
092
40.0
9.4
4.3
3.65
310
.955
382.
5688
475
90.
00n/
a1.
600.
0020
0 x
100
7762
857
194
0.09
250
.712
.64.
03.
653
13.8
7681
3.45
0314
89
0.00
n/a
1.60
0.00
200
x 10
062
736
6725
90.
092
62.0
17.7
3.5
3.65
316
.974
544.
8354
777
90.
00n/
a1.
600.
0020
0 x
100
7667
479
215
0.09
255
.012
.54.
43.
653
15.0
605
3.42
513
90.
00n/
a2.
600.
0020
0 x
100
108
659
9924
20.
092
50.7
13.2
3.9
3.65
313
.876
813.
6014
235
90.
00n/
a2.
600.
0020
0 x
100
122
707
118
159
0.09
253
.83.
814
.33.
653
14.7
331
1.03
2576
90.
00n/
a2.
600.
0020
0 x
100
101
676
9225
90.
092
52.9
15.4
3.4
3.65
314
.481
254.
2058
582
100.
00n/
a0.
600.
0020
0 x
100
105
1080
9737
90.
092
89.7
25.9
3.5
3.65
324
.555
167.
1021
079
100.
00n/
a0.
600.
0020
0 x
100
4119
302
485
0.09
217
3.8
44.4
3.9
3.65
347
.574
0512
.164
249
100.
00n/
a0.
600.
0020
0 x
100
4410
0919
268
0.09
288
.822
.93.
93.
653
24.3
0331
6.27
1010
110
0.00
n/a
1.60
0.00
200
x 10
097
658
9529
50.
092
51.6
18.4
2.8
3.65
314
.128
665.
0369
559
100.
00n/
a1.
600.
0020
0 x
100
6563
049
254
0.09
252
.018
.92.
83.
653
14.2
294
5.16
2879
810
0.00
n/a
1.60
0.00
200
x 10
049
515
3814
50.
092
42.9
9.8
4.4
3.65
311
.736
112.
6947
714
110.
00n/
a0.
600.
0020
0 x
100
3812
062
150
0.09
210
7.5
13.6
7.9
3.65
329
.415
823.
7273
474
110.
00n/
a0.
600.
0020
0 x
100
3614
7058
190
0.09
213
1.9
12.1
10.9
3.65
336
.114
973.
3243
909
110.
00n/
a0.
600.
0020
0 x
100
6710
3543
310
0.09
289
.124
.63.
63.
653
24.3
7887
6.72
4336
2
120.
00n/
a0.
60D
amp
200
x 10
081
1520
2838
00.
092
132.
432
.44.
13.
653
36.2
409
8.86
5042
412
0.00
n/a
0.60
Dam
p20
0 x
100
4218
3034
406
0.09
216
4.5
34.2
4.8
3.65
345
.030
399.
3687
3812
0.00
n/a
0.60
Dam
p20
0 x
100
3115
1546
265
0.09
213
6.5
20.1
6.8
3.65
337
.374
215.
5154
667
*12
1.00
n/a
1.60
Dam
p20
0 x
100
40>2
100
0.09
23.
653
>518
130.
00n/
a0.
600.
0020
0 x
100
157
525
169
0.09
252
.813
.24.
03.
653
14.4
5606
3.62
6608
313
0.00
n/a
0.60
0.00
200
x 10
031
592
4213
00.
092
51.6
8.1
6.4
3.65
314
.128
662.
2162
606
130.
00n/
a0.
600.
0020
0 x
100
1957
818
124
0.09
251
.49.
85.
33.
653
14.0
7829
2.66
9586
613
0.00
n/a
1.10
0.00
200
x 10
085
582
8320
40.
092
45.7
11.1
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034
Inpu
t By:
MT
Che
cked
By:
BC
Dat
e: 2
0/01
/200
9
*Not
e: T
est a
ttem
pted
on
BH
12 a
t 1.6
0m.
She
ar v
ane
refu
sed
at 2
100
divi
sion
s.
CO
N08
3141
AP
PE
ND
IX A
AIRTRICITY HOLDINGS LIMITEDVIKING WIND FARM
Table 2: Peat Depths
Borehole Peat Depth (m)1 1.82 1.13 0.84 3.35 1.96 1.07 3.88 1.39 2.710 2.111 0.712 2.113 1.214 1.015 2.4
NotesMaximum peat thicknesses estimated by hand probing.All probes terminated on the basis of refusal.Insitu field vane test results for each position presented separately.
Input By: MT Checked By: BC Date: 20/01/09
CON083141 APPENDIX A
AIRTRICITY HOLDINGS LIMITED VIKING WIND FARM
APPENDIX B Drawings
Exploratory Hole Location Plan Figures LP1 and LP2
Contract No: CON083141 Appendix B Contents Page
AIRTRICITY HOLDINGS LIMITED VIKING WINDFARM
Report No: CON083141 APPENDIX A Figure LP
1
Development layout and GI locations, Delting & Collafirth
AIRTRICITY HOLDINGS LIMITED VIKING WINDFARM
Report No: CON083141 APPENDIX A Figure LP
2
Development layout and GI locations, Nesting & Kergord
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