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ACOPS

ADVISORY COMMITTEE ON PROTECTION OF THE SEA

ANNUAL SURVEY OF REPORTED DISCHARGES

ATTRIBUTED TO VESSELS AND OFFSHORE OIL AND GAS

INSTALLATIONS OPERATING IN THE UNITED KINGDOM

POLLUTION CONTROL ZONE

2011

Dr Trevor Dixon

A survey conducted on behalf of the Maritime and Coastguard Agency

Cambridge, March 2012

CONTENTS

Page Number

Summary 1

SECTION 1 Introduction and survey design 3

SECTION 2 Descriptive statistics and trend assessments 5

SECTION 3 Summary of larger discharges (2 tonnes or more) 22

SECTION 4 Enumeration area summary reports:

1 North-east England 30

2 Eastern England 30

3 Essex & Kent 31

4 Southern England 32

5 South-west England 34

6 Bristol Channel & South Wales 35

7 Irish Sea 36

8 Western Scotland 37

9 Orkney & Shetland Islands 38

10 Eastern Scotland 38

11 UKCS (Oil and gas installations and vessels) 40

SECTION 5 Quality assurance plan and acknowledgements 43

APPENDIX 1 Summary of reported incidents

APPENDIX 2 Survey questionnaire and accompanying guidelines

_______________________________

Advisory Committee on Protection of the Sea,

c/o MCSC,

Trinity College (Julian Hunt),

Cambridge CB2 1TQ

March 2012

LIST OF FIGURES

FIGURE 1 Annual totals for reported discharges attributed to vessels and

offshore oil and gas installations 2000-2011

FIGURE 2 Boundaries of UK Pollution Control Zone and individual

enumeration areas

FIGURE 3 Locations of reported oil discharges attributed to vessels

LIST OF TABLES

TABLE 1 Total incidents reported by category of pollution and

enumeration area for 2010 and 2011

TABLE 2 Total incidents reported and distribution by marine

environmental zone and enumeration area

TABLE 3 Amount and extent of reported pollution by enumeration area

TABLE 4 Identification of source of pollution and reported type by

enumeration area

TABLE 5 Reported source of pollution by enumeration area

TABLE 6 Details of prosecutions brought by the competent authorities in

the United Kingdom during 2011

TABLE 7 Total number of incident reports received from each reporting

organisation

1

SUMMARY

The Maritime and Coastguard Agency (MCA) exercises Central Government's statutory

responsibilities for taking action when oil or hazardous and noxious substances

emanating from any at-sea activity threatens the United Kingdom or its surrounding

waters. As part of its commitment to provide cleaner seas around the United Kingdom,

the MCA publishes, via ACOPS, an annual survey of reported discharges attributed to

vessels and offshore oil and gas installations operating in the United Kingdom Pollution

Control Zone (UKPCZ). The annual survey results complement historical data and

records and enable MCA's Counter Pollution and Response (CPR) Team to monitor

trends in the number of incidents, the amount of oil and chemicals spilt, the geographical

distribution of spills, the sources of pollution and the nature of the pollution.

Following analysis of 1,600 incident reports and supporting information, 669 separate

accidental discharges from vessels and offshore oil and gas installations were identified

in the survey area during 2011. An overall increase of 14.9% was evident in the total

number of incidents reported from all sources over the previous year’s total.

A total of 150 vessel-sourced discharges were reported during 2011 which was 1 more

than the previous year’s total but significantly fewer than the mean annual total of 200

reported discharges between 2000 and 2010.

A total of 519 accidental discharges were reported by offshore oil and gas installations

during 2011 representing a 19.9% increase on the previous year’s total and the highest

annual total since the survey commenced.

Further analysis of these statistics showed that the total of 279 oil reports from offshore

oil and gas installations during 2011 was the same number as the mean annual total

reported between 2000 and 2010.

The total of 240 non-mineral oil reports by offshore installations during 2011, primarily

those involving chemical substances, was 73 more than the total recorded during the

previous year.

The reported incidents from all sources during 2011 comprised 62.9% involving mineral

oils, 36.2% involving chemicals (including oil-based mud) and 0.9% involving other

substances (including vegetable and animal oils).

Approximately 84% of all reported accidental discharges were in the open sea, 13% were

in ports and harbours and 3% were across the remaining marine environmental zones.

Survey respondents submitted details of 89 incidents involving accidental discharges

from vessels operating in ports and harbours during 2011 which was 20 fewer compared

to the mean annual total of 109 discharges between 2000 and 2010.

2

Estimated volumes of accidental discharges were recorded in 618 incident reports, or

92% of the total. The modal class for oil discharges was less than 455 litres but larger

spill volumes of between 456 litres and approximately 25 tonnes were recorded in 5 of

the 11 survey enumeration areas. In total 7% of all oil discharges were greater than 455

litres, where this information was recorded, compared with 6% during the previous year.

The largest reported oil discharge, with an estimated maximum volume of 25 tonnes and

occupying an area of 5km2, was reported by the Byford Dolphin Mobile Offshore Drilling

Unit on 21 November. The surface sheen was attributed to an unidentified passing vessel

and later dispersed naturally without posing a risk to the shoreline.

The modal class for chemical spills was also less than 455 litres but 44 releases, or 18%

of the total, were of 1 tonne or more. The largest chemical incident involving a release

from the Hunter Pipeline of 189,840 kg of methanol and 121.6 kg of KI-5351 was

caused by a pipeline failure during an integrity pressure test on 10 November. The

pipeline was subsequently removed from service and a replacement installed.

At least 31 confirmed discharges were attributed to vessel casualties including 21 fishing

vessels, 8 pleasure craft and workboats, a tug and a barge. The vessel-casualty spills

occurred in all enumeration areas with the exception of the UKCS.

Reporting organisations submitted details of 2 successful prosecutions brought by the

competent authorities following pollution offences during 2011 and another 2 cases were

under consideration or had not been called at the time of reporting. The owners of the

oil/chemical tanker Pretty Time were fined £20,000 with costs totalling £75,000

following a palm oil discharge in the Outer Nab Anchorage. The Baltnautic Shipping

Company was fined £12,391 following a diesel oil discharge from the general cargo

vessel MV Nina 1 in the Port of London on 4 August.

Observations from air surveillance patrols and a satellite surveillance programme were

again employed by the MCA and DECC to help identify discharges at sea.

_________________________________________________

3

SECTION 1: INTRODUCTION AND SURVEY DESIGN

1.1 INTRODUCTION

1.1.1 Since 1965 the Advisory Committee on Protection of the Sea (ACOPS) has

compiled statistics and other information on different types of marine

pollution in the waters around the British Isles. The competent authorities

and other stakeholder groups have used this information for a wide range of

purposes including policy and planning decisions, evaluations of particular

programmes, assessments of regulatory compliance levels, development of

risk assessment models and to support educational campaigns. Examples of

organisations that have consulted the survey data include the Department for

Transport, European Commission, International Maritime Organisation,

Local Authority Associations, Marine Management Organisation, the

Scottish Government and the Welsh Assembly Government.

1.1.2 The Maritime and Coastguard Agency (MCA) exercises Central

Government's statutory responsibilities for taking action when oil or other

hazardous and noxious substances emanating from any at-sea activity

threatens the United Kingdom or its surrounding waters. As part of its

commitment to provide cleaner seas around the United Kingdom, the MCA

publishes, via ACOPS, an annual survey of reported discharges attributed to

vessels and offshore oil and gas installations operating in the United

Kingdom Pollution Control Zone (UKPCZ). The survey results complement

historical data and records and enable MCA's Counter Pollution and

Response (CPR) Team to monitor trends in the number of incidents, the

amount of oil and chemicals spilt, the geographical distribution of spills, the

source of pollution and the nature of the pollution.

1.2 SURVEY DESIGN

1.2.1 In accordance with the MCA's survey specification, a two-page questionnaire

was designed to capture information relating to discharges of oil and other

hazardous and noxious substances from vessels and offshore oil and gas

installations. The survey area included the UKPCZ and adjacent areas of

jurisdiction including ports, harbours and tidal stretches of rivers and

estuaries. The boundaries of the UKPCZ are shown in Figure 2. The survey

questionnaire and accompanying guidelines are provided in Appendix 2.

1.2.2 The survey questionnaire was distributed to the appropriate representatives

of coastal local authorities, port and harbour authorities, national

environment agencies and animal welfare groups. In addition, questionnaire

responses were supplemented with Petroleum Operation Notices (PON1s)

provided by the Department of Energy and Climate Change’s (DECC)

Offshore Environment Unit and Pollution Reports (POLREPS) provided by

the MCA. PON1s are submitted to DECC by offshore oil and gas installation

operators for all unpermitted oil or chemical releases to sea regardless of the

volume lost. The resulting information was entered into a database

4

identifying separate pollution incidents by date, location and other survey

attributes.

1.2.3 Following analysis of data the survey results are presented in a range of

different formats. In Section 2 descriptive statistics are provided for reported

discharges including some numerical trends with 2000 as the base year and

also including categories and types of polluting substances, geographical

locations and distributions of incidents, amount and extent of reported

pollution, sources, details of prosecutions brought by the competent

authorities and reporting effort.

1.2.4 In Section 3 summary reports are provided for all larger discharges of 2

tonnes or more. Further information is provided in Section 4 for each of 11

geographical areas around the United Kingdom, including the causes of

particular incidents and counter-pollution responses where appropriate.

1.2.5 Elements of the survey quality assurance programme are outlined in Section

5 including the number of incident reports compiled from information

submitted by two or more reporting organisations. Moreover, the current

database is provided in Appendix 1 as part of the quality assurance

programme in order to ensure the reliability and accuracy of the survey

results. This is further enhanced by posting the survey report on the MCA’s

website as a publicly available document for scrutiny by all interested

stakeholder groups.

_______________________________________

5

SECTION 2: DESCRIPTIVE STATISTICS AND TREND

ASSESSMENTS

2.1 NUMERICAL TRENDS IN REPORTED DISCHARGES

2.1.1 Following analysis of 1,600 incident reports and supporting information, 669

separate discharges from vessels and offshore oil and gas installations were

identified within the survey area during 2011. An overall increase of 14.9%

was evident in the total number of incidents reported over the previous year’s

total.

2.1.2 Trends in annual totals for reported discharges between 2000 and 2011 are

displayed in Figure 1, including separate line-graphs for vessels and offshore

oil and gas installations.

2.1.3 A total of 150 vessel-sourced discharges were reported during 2011 which

was 1 more than the previous year’s total but significantly fewer than the

mean annual total of 200 reported discharges between 2000 and 2010.

2.1.4 A total of 519 accidental discharges were reported by offshore oil and gas

installations during 2011 representing a 19.9% increase on the previous

year’s total and the highest annual total recorded since the survey

commenced.

2.1.5 Further analysis of these statistics showed that the total of 279 oil reports

from offshore oil and gas installations during 2011 was the same number as

the mean annual total reported between 2000 and 2010.

2.1.6 During 2011 offshore operators reported a total of 240 incidents involving

accidental releases of non-mineral oil substances, primarily those involving

chemical substances, and further details are provided in Appendix 1.

2.2 CATEGORIES OF REPORTED DISCHARGES

2.2.1 In Table 1 statistics are provided showing the different categories and

numbers of discharges reported during 2010 and 2011 for each of 11

enumeration areas. Geographical boundaries of each enumeration area and

the complete survey area are shown in Figure 2. It should be noted that the

statistics for discharges in the United Kingdom Continental Shelf (UKCS)

Oil and Gas enumeration area have been presented in two source categories:

offshore oil and gas installations, and vessels.

2.2.2 The discharges from all sources reported during 2011 comprised 62.9%

mineral oils, 36.2% chemicals (including oil-based mud) and 0.9% other

substances (including vegetable and animal oils). During 2010 there were no

reports of any observed discharges of garbage at sea from vessels or offshore

oil and gas installations.

7

TABLE 1: TOTAL INCIDENTS REPORTED BY CATEGORY OF POLLUTION AND ENUMERATION AREA FOR 2010 AND

2011 (a)

.

Enumeration

Area

Mineral

oils

Garbage Vegetable &

animal oils

Chemicals Other

substances

Totals

1. North-east England 9 (14) - (-) - (-) - (1) - (-) 9 (15)

2. Eastern England 6 (9) - (-) - (-) - (-) 1 (-) 7 (9)

3. Essex & Kent 12 (10) - (-) - (1) - (1) - (-) 12 (12)

4. Southern England 12 (27) - (-) 3 (1) - (-) 1 (-) 16 (28)

5. South-west England 17 (11) - (-) - (-) - (-) - (-) 17 (11)

6. Bristol Channel & South Wales 8 (6) - (-) - (-) - (-) - (-) 8 (6)

7. Irish Sea 8 (14) - (-) 1 (-) 2 (-) - (-) 11 (14)

8. Western Scotland 18 (9) - (-) - (-) - (-) - (-) 18 (9)

9. Orkney & Shetland Islands 5 (1) - (-) - (-) - (-) - (-) 5 (1)

10. Eastern Scotland 23 (27) - (-) - (1) - (1) - (-) 23 (29)

11. UKCS oil & gas installations 279 (266) - (-) - (-) 240 (167) - (-) 519 (433)

11. UKCS vessels 24 (15) - (-) - (-) - (-) - (-) 24 (15)

Totals 421 (409) - (-) 4 (3) 242 (170) 2 (-) 669 (582)

(a) The figures in parenthesis are the corresponding values from the 2010 survey.

9

2.3 LOCATIONS OF REPORTED DISCHARGES

2.3.1 The geographical location of each reported discharge has been identified in

Appendix 1 together with other information for each incident. To facilitate

comparisons with previous years’ data, reported locations of all vessel-source

oil discharges in the open sea, nearshore waters and estuaries during 2011 are

plotted in Figure 3. Data for ports have been grouped separately for England,

Wales, Scotland and Northern Ireland.

2.3.2 The overall geographical pattern for vessel-source oil discharges in the

survey area during 2011 showed fewer reports of incidents across 5

enumeration areas, with the highest density of reported incidents in the open

sea occurring in the vicinity of North Sea oil and gas installations.

2.3.3 The geographical locations of all discharges are further analysed by their

distribution across five marine environmental zones in each enumeration

area: open sea; tidal river or estuary; bay or nearshore waters; beach or shore;

and port or harbour. The results are presented in Table 2, which shows that

84% of all reported discharges were in the open sea, 13% in ports or

harbours and 3% across the remaining zones.

2.3.4 Reporting organisations submitted details of 89 incidents involving

discharges of polluting substances from vessels operating in ports or

harbours during 2011, which was 20 fewer than the mean annual total of 109

discharges between 2000 and 2010. Further details are provided in Section 4.

2.4 AMOUNT AND EXTENT OF REPORTED POLLUTION

2.4.1 Information describing observed dimensions and volumes of pollution for

each enumeration area is presented in Table 3. It should be noted that the

extent of pollution for incidents occurring within the UKCS enumeration

area 11 was determined by the observed approximate release area of water

surface pollution in 2 categories: up to 1.6 km2 ; or above 1.6 km2. Estimates

for volumes of discharges were not confirmed in written reports for 51

incidents, or 8 % of the total reported.

2.4.2 Excluding discharges from offshore oil and gas installations and vessels

operating in the UKCS area 11, approximately 4% of oil slicks or sheens

were greater than 1.6 km in length when this information was reported.

Broadly comparable statistics from the 2000, 2005 and 2010 surveys were

12%, 7% and 10% respectively. Within the UKCS area 11 a release area of

water surface pollution greater than 1.6 km2 was reported in 8 incidents

following oil discharges.

2.4.3 The modal class for all oil discharges was less than 455 litres but larger

estimated maximum volumes of between 456 litres and 25 tonnes were

recorded in 5 of the 11 survey enumeration areas. In total, 7% of all oil

discharges (including 3 ongoing releases) were greater than 455 litres, when

this information was recorded, compared to 6% during the previous year

(Refer to Table 3 and Appendix 1 Table 11).

11

TABLE 2: TOTAL INCIDENTS REPORTED AND DISTRIBUTION BY MARINE ENVIRONMENTAL ZONE AND

ENUMERATION AREA (a)

.

Enumeration area Open sea Tidal river/

estuary

Bay/nearshore

waters

Beach/shore Port/harbour Totals

1. North-east England - - - - 9 9

2. Eastern England 2 - 1 1 (1) 3 7 (1)

3. Essex & Kent 1 - 1 - 10 12

4. Southern England 4 (3) - - 1 11 (1) 16 (4)

5. South-west England 2 3 2 3 7 17

6. Bristol Channel & South Wales - - 1 - 7 8

7. Irish Sea 4 (2) - - 1 6 (1) 11 (3)

8. Western Scotland 2 - 2 - 14 18

9. Orkney & Shetland Islands 1 - - - 4 5

10. Eastern Scotland 3 - 2 - 18 23

11. UKCS oil & gas installations 519 (240) (b) (b) (b) (b) 519 (240)

11. UKCS vessels 24 (b) (b) (b) (b) 24

Totals 562 (245) 3 (-) 9 (-) 6 (1) 89 (2) 669 (248)

(a) The figures in parenthesis are included in the totals and refer to incidents involving discharges of substances other than mineral oil.

(b) Not applicable.

12

TABLE 3: AMOUNT AND EXTENT OF REPORTED POLLUTION BY ENUMERATION AREA(a).

Enumeration area Extent of pollution (b)

Estimated volumes of discharges

Water surface Shoreline

1-455

litres

456 litres –

999 litres

1-50 tonnes >50

tonnes

Not

known <1.6 km >1.6 km < 1.6

km

> 1.6

km

1. North-east England 9 - - - 8 - - - 1

2. Eastern England 6 - - 1 (1) 3 - - - 4 (1)

3. Essex & Kent 12 - - - 9 - - - 3

4. Southern England 13 (2) 2 (2) - 1 11 (1) - - - 5 (3)

5. South-west England 13 1 2 1 4 1 - - 12

6. Bristol Channel & South Wales 8 - - - 6 - - - 2

7. Irish Sea 7 (1) 3 (2) - 1 5 3 (1) 1 (1) - 2 (1)

8. Western Scotland 18 - - - 8 - 1 - 9

9. Orkney & Shetland Islands 4 1 - - 1 - - - 4

10. Eastern Scotland 21 2 - - 13 - 1 - 9

11. UKCS oil & gas installations (c) 513 (240) (c) 6 (d) (d) (e) 432 (169) 37 (30) 51 (42) 2 (2) -

11. UKCS vessels (c) 22 (c) 2 (d) (d) 19 1 4 - -

Totals 646 (243) 17 (4) 2 4 (1) 519 (170) 42 (31) 58 (43) 2 (2) 51 (5)

(a) The figures in parenthesis are included in the totals and refer to incidents involving discharges of substances other than mineral oils. (b) The units given are the maximum observed dimensions of pollution on water or the shoreline. (c) Approximate release area of water surface pollution <1.6 km2 or >1.6 km2. (d) Not applicable. (e) The figures include the 2011 volumes of discharges from 10 ongoing incidents that commenced during 2006, 2007, 2009 and 2010 and the

figures exclude the volumes of discharges from 7 incidents that commenced during 2011 and were under investigation at the time of

reporting (Refer to Appendix 1 Table 11).

13

2.4.4 The largest oil discharge with an estimated maximum volume of 25 tonnes

and occupying an area of approximately 5 km2 was reported by the Byford

Dolphin Mobile Offshore Drilling Unit (MODU) on 21 November. The

surface sheen was attributed to an unidentified passing vessel and later

dispersed naturally without posing a risk to the shoreline (Refer 3.4

UKCS/624).

2.4.5 The modal class for chemical spills was also less than 455 litres but 44

releases, or 18 % of the total (including 7 ongoing releases), were of 1 tonne

or more. The largest chemical incident involving a release from the Hunter

Pipeline of 189,840 kg of methanol and 121.6 kg of KI-5351 was caused by a

pipeline failure during an integrity pressure test on 10 November. The

pipeline was removed from service and a replacement installed (Refer 3.1

UKCS/1630).

2.4.6 In Section 3 details are provided for all reports involving releases or

discharges of 2 tonnes or more during 2011 including 8 incidents that

commenced during previous years.

2.5 CATEGORIES AND TYPES OF POLLUTION

2.5.1 Statistics showing the different categories and types of polluting substances

are presented in Table 4. Mineral oils were again the most frequently

recorded category of polluting substances and were identified in 63% of

incident reports. Crude oils accounted for 19% of the identified types of

mineral oil discharges, this figure being 9% less than the previous year’s.

The largest crude oil spill, with an estimated volume of 5.1 tonnes, was

reported by the Byford Dolphin vessel after a pressure relief valve between a

heater and separator lifted prematurely during well test operations. To

prevent any further release of oil the well was closed on the surface at the

choke manifold (Refer 3.15).

2.5.2 Bunker, diesel, fuel and gas oils were spilt in varying quantities from vessels

or oil and gas installations on 165 occasions, 15 more than the previous

year’s total, across all enumeration areas. The spills occurred most frequently

during bunkering operations in the UKCS, western Scotland and eastern

Scotland enumeration areas.

2.5.3 The largest diesel spill of 7.16 tonnes was reported by the Armada

installation after a drain valve was inadvertently left open during a

maintenance operation on 7 February. To prevent any further release the

diesel drain was isolated (Refer 3.13). During adverse weather a

decommissioned fishing vessel ran aground at Corpach in western Scotland

on 9 December causing a 1-tonne diesel oil spillage (Refer 4.8.3).

14

TABLE 4: IDENTIFICATION OF A SOURCE OF POLLUTION AND REPORTED TYPE BY ENUMERATION AREA.

Vessel/offshore Types of pollution (a)

Enumeration Area pollution source (b)

Mineral oils Garbage Other substances

Identified Suspected 1 2 3 4 5 6 7 8 9 10 11 12 13

1. North-east England 8 1 1 1 5 2 - - - - - - - - -

2. Eastern England 4 3 (1) - 3 1 - 2 - - - - - - 1 -

3. Essex & Kent 11 1 - 11 - - 1 - - - - - - - -

4. Southern England 15 (4) 1 - 8 3 - 1 - - - 3 - - 1 -

5. South-west England 12 5 - 11 1 2 3 - - - - - - - -

6 6. 6. 6.Bristol Channel & South Wales 8 - - 5 2 1 - - - - - - - - -

7. Irish Sea 8 (3) 3 - 4 1 3 - - - - 1 - 2 - -

8. Western Scotland 17 1 - 14 1 1 2 - - - - - - - -

9. Orkney & Shetland Islands 5 - - 2 - 1 2 - - - - - - - -

10. Eastern Scotland 20 3 - 13 6 1 3 - - - - - - - -

11. UKCS oil & gas installations 519 (240) - 64 92 90 4 29 - - - - 8 232 - -

11. UKCS vessels 4 20 2 1 2 - 19 - - - - - - - -

Totals 631 (247) 38 (1) 67 165 112 15 62 - - - 4 8 234 2 -

Percentage of total reports 94 6 10 25 17 2 9 - - - 0.6 1.2 34.9 0.3 -

Key: Mineral Oils 1: Crude oil. 2: Bunker, diesel, fuel and gas oils. 3: Lubrication & hydraulic oils. 4: Other oil types.

5: Unidentified oil.

Garbage 6: Galley wastes. 7: Other garbage types. 8. Unidentified type of garbage.

Other substances 9: Animal & vegetable oils. 10: Oil-based mud products.

11: Other chemical substances. 12: Other substances. 13: Unidentified substances.

(a) The figures are frequencies for each of the categories shown and more than one entry may be made for each pollution incident. (b) The figures in parenthesis are included in the totals and refer to incidents involving discharges of substances other than mineral oils.

15

2.5.4 Lubrication and hydraulic oil spills were recorded in 9 of the 11 survey

enumeration areas with 90 spills attributed to offshore oil and gas

installations. The largest spill of 2.972 tonnes of hydraulic oil was an

ongoing release from the Thelma Manifold that commenced on 1 January

and continued throughout 2011 following a hydraulic system failure. At the

time of reporting the operator had planned a ROV intervention to stem the

leakage (Refer 3.39).

2.5.5 Respondents described the remaining types of mineral oil discharges as bilge

oils, deck oils, emulsified oil, oily water, open drains oil, reformate,

weathered or semi-weathered globules and various waste oils. Three reports

referred to beach pollution incidents involving weathered or semi-weathered

oil globules. The largest of these incidents occurred on 20 December after

lumps of oil were washed ashore between Formby Point and Birkdale. A

clean-up operation was completed over 2 days and at least 50 oiled birds

including gulls and waders were observed (Refer 4.7.5).

2.5.6 A total of 248 reports referred to incidents involving discharges of

substances other than mineral oils during 2011 compared to 173 discharges

during 2010. Eight incidents followed discharges from vessels operating in

ports and in the open sea. A split hose was identified as the source of a 3-

tonne palm oil spill from the tanker NCC Amal (29,168 gt, built 2011)

berthed at Liverpool’s Canada Dock and a clean-up operation was

completed. The Eastern Inshore Fisheries and Conservation Authority

(EIFCA) provided details of a significant beach pollution incident in which

blobs or larger lumps of paraffin wax were found on beaches over a 100 km

stretch of coastline between Suffolk and East Norfolk from 1 January to

September 2011. The source of the wax was believed to have been a

discharge from an unidentified vessel (Refer 4.2.2).

2.5.7 Offshore operators reported 240 new incidents involving accidental

discharges of chemical substances during 2011 compared to 167 discharges

during the previous year. The identified substances were all associated with

exploration and production operations and included barite, glycol solutions,

hydraulic fluids, methanol and sodium. The estimated volumes of accidental

chemical discharges ranged from 0.001 kg to 189,840 kg and 44 discharges

(including ongoing incidents that commenced in previous years) were 1

tonne or more. Further details are provided in Section 3 and Appendix 1.

2.5.8 Chemicals are required to be used as part of offshore exploration and

production operations. The vast majority of chemicals spilled are regulated

under the provisions of the Offshore Chemicals Regulations 2002 (OCR) for

normal operational use and discharge to sea. Under the provisions of OCR

each operational chemical is assessed to determine its potential

environmental impact.

16

2.6 REPORTED SOURCES OF POLLUTION

2.6.1 The figures in Table 4 show for each enumeration area the numbers of

incidents in which reporting organisations either identified a specific source

of pollution or suspected a vessel or offshore pollution source. The statistics

for the identified sources of pollution are further analysed in Table 5 to show

the different types of vessels. Additional details including the names of

vessels or installations are provided in Appendix 1.

2.6.2 This method of analysis showed that oil and gas installations operating on the

UKCS accounted for 82% of all identified reports of pollution compared to

81% during the previous year. Corresponding statistics for fishing vessels,

pleasure craft, general cargo vessels and the remaining types of vessels were

6.3%, 2.4%, 1.3% and 7.8% respectively.

2.6.3 Reporting organisations identified discharges from oil and chemical tankers

on 10 occasions during 2011 compared to 11 occasions during the previous

year. Port and harbour authorities reported tanker incidents at Fawley, ABP

Humber and Liverpool. The oil/chemical tanker Nena K (4,218 gt, built

2009) berthed at the Fawley Refinery was identified as the source of a 30-

litre paraffin wax discharge on 7 September and a clean-up operation was

completed. A 100-litre diesel oil spill was reported by the chemical and

product tanker Hans Scholl (25,400 gt, built 2004) in the same location on

19 November. The spill occurred during a loading arm disconnection

operation and absorbent pads and booms were deployed to recover the oil

from the water surface.

2.6.4 Six tanker incidents were identified in the English Channel and Irish Sea 3 of

which were believed to have been caused by permissible discharges of

chemicals or vegetable oils in tank washings. The chemical/oil tanker

Sichem Palace (5,451 gt, built 2004) reported an accidental spillage of 20

litres of heavy fuel oil during an internal transfer operation in the English

Channel on 14 June.

2.6.5 At least 31 confirmed discharges were attributed to vessel casualties

including 21 fishing vessels, 8 pleasure craft and workboats, a tug and a

barge. The vessel-casualty spills occurred in all enumeration areas with the

exception of the UKCS. Moreover, vessel casualties accounted for 52% of all

confirmed discharges attributed to fishing vessels and 53% of all discharges

attributed to pleasure craft and workboats. The corresponding statistics from

the 2010 survey were 33% and 46% respectively. Further details identifying

the causes of vessel casualties are provided in Section 4 and Appendix 1.

17

TABLE 5: REPORTED SOURCE OF POLLUTION BY ENUMERATION AREA(a).

Enumeration area MCT MFV MSV MT MV OOI PC WR O

1. North-east England - 1 - 1 2 - - - 4

2. Eastern England - 1 - - - - 1 - 2

3. Essex & Kent - 2 1 - 1 - 3 - 4

4. Southern England 4 (4) 1 - 2 1 - 4 - 3

5. South-west England - 3 - - 1 - 5 - 3

6. Bristol Channel & South Wales - 4 - - - - - - 4

7. Irish Sea 2 (2) 1 1 1 (1) 1 - 2 - -

8. Western Scotland - 13 - - 1 - - - 3

9. Orkney & Shetland Islands - 5 - - - - - - -

10. Eastern Scotland - 9 4 - 1 - - - 6

11. UKCS oil & gas installations - - - - - 519 (240) - - -

11. UKCS vessels - - 2 - - - - - 2

Totals 6 (6) 40 8 4 (1) 8 519 (240) 15 - 31

Key: MCT: Chemical tanker. MFV: Fishing vessel. MSV: Offshore support vessel. MT: Coastal oil tanker/VLCC.

MV: General cargo vessel. OOI: Offshore oil or gas installation. PC: Pleasure craft. WR: Wreck. O: Other type of vessel.

(a) The figures in parenthesis are included in the totals and refer to incidents involving discharges of substances other than mineral

oils.

18

2.6.6 The Yarmouth Navigator (116 gt, built 1943), a decommissioned Royal

Navy Motor Fishing Vessel, sank in Plymouth Sound on 30 January and a

diesel surface sheen was later observed above the wreck site. In nearshore

waters the 15-metre gill netter Ben-My-Chree sank whilst under tow in a

semi-submerged condition off Gwennap Head on 11 March and a diesel

sheen was later observed floating on the surface above the wreck. On 6

August the MFV Sea Horse sank at Oare Creek near Faversham causing a

10-litre lubrication oil spillage. A clean-up operation was required after the

MTUG Chieftain capsized and sank off Greenwich Pier on 12 August. The

11-metre fishing boat Flowing Tide II sank whilst alongside at Fishguard

Harbour on 18 November following an engine-cooling water pipe failure.

The vessel was later raised and a resulting small diesel sheen dispersed

naturally.

2.6.7 In Scotland the fish farm vessel Lady Laxford partially sank alongside

Kinlochbervie Harbour causing a 100-litre marine gas oil spill. Booms were

deployed around the vessel which was later re-floated. The prawn trawler

Vellee (103 tonnes gt, built 1981) sank in the middle of the Minch off

Benbecula on 6 August and a light fuel oil sheen and floating debris were

later observed near the wreck site. On 18 March the MFV Kestrel ran

aground in Buckie Harbour causing a 27-litre spillage of diesel oil. The

vessel’s vents were plugged to prevent any further release of oil and a clean-

up operation was undertaken by contractors. A SEPA report provided details

of a counter-pollution operation in Dundee Harbour following a diesel oil

leak from a sunken former fishing vessel. A boom was placed across the

harbour but this failed to prevent a small quantity of oil escaping into the

River Tay.

2.7 PROSECUTIONS

2.7.1 Details of 2 successful prosecutions brought by the competent authorities

following pollution offences during 2011 are summarised in Table 6.

Another 2 cases were under consideration or had not been called at the time

of reporting.

2.7.2 Ten reporting organisations provided details of an incident in which palm oil

residues were washed ashore along stretches of the Dorset, Hampshire and

West Sussex coastlines between 11 and 18 January. A back-track analysis

indicated that the pollution originated from the oil/chemical tanker Pretty

Time (30,006 gt, built 2007) whilst the vessel was engaged in tank cleaning

operations in the Outer Nab Anchorage. Following a prosecution brought by

the Maritime and Coastguard Agency at Southampton Magistrates’ Court the

owners of the tanker were fined £20,000 with costs totalling £75,000 (Refer

4.4.2).

19

TABLE 6: DETAILS OF PROSECUTIONS BROUGHT BY THE COMPETENT AUTHORITIES IN THE UNITED KINGDOM

DURING 2011 (a)

Date and location of incident Name of vessel or offshore installation

and type of pollution

Prosecution brought by Fine

10 January Outer Nab Anchorage MCT Pretty Time palm oil Maritime & Coastguard Agency £20,000

4 August Port of London MV Nina One 6 litres diesel oil Port of London Authority £12,391

(a) Another 2 cases were under consideration or had not been called at the time of reporting. Following another 2 incidents resulting in oil spills

cases were brought by the Maritime & Coastguard Agency for offences contravening Sections 58 and 100 of the Merchant Shipping Act 1995

and the Merchant Shipping (Distress Signals and Prevention of Collisions) Regulations 1996 (Refer 4.8.2 and 4.9.2).

__________________________________________________________________________________________________________________

Prosecutions brought under Control of Pollution Act 1974, Merchant Shipping Act 1995, Merchant Shipping (Prevention of Oil Pollution)

Regulations 1996, Merchant Shipping (Dangerous or Noxious Liquid Substances in Bulk) (Amendment) Regulations 1996, Merchant Shipping

(Prevention of Pollution by Garbage) Regulations 1998, Offshore Chemicals Regulations 2002, Offshore Petroleum Activities (Oil Pollution

Prevention and Control) Regulations 2005.

20

2.7.3 The general cargo vessel MV Nina 1 (998 gt, built 1984) was identified as

the source of a 6-litre diesel oil discharge in a report submitted by the Port of

London Authority. A subsequent investigation revealed that the spillage took

place because a scupper had not been blocked as oil was being transferred

forward to the vessel’s bow thruster tank. A successful prosecution was

brought under Section 131 of the Merchant Shipping Act 1995 and

magistrates imposed a fine of £12,391 on the vessel’s owner’ the Baltnautic

Shipping Company Limited (Refer 4.3.3).

2.7.4 Respondents referred to another 2 incidents resulting in oil spills in which

cases were brought by the Maritime and Coastguard Agency for offences

contravening Sections 58 and 100 of the Merchant Shipping Act 1995 and

the Merchant Shipping (Distress and Prevention of Collisions) Regulations

1996.

2.7.5 On 31 January the French-registered stern trawler Jack Abry II (840 gt, built

2005) grounded on the north coast of the Isle of Rum in heavy weather and

oil was later observed around the vessel and in Kilmory Bay. On 2 February

the skipper of the vessel appeared in Stornoway Sheriff Court and pleaded

guilty to failing to maintain a proper lookout and was fined £3,000 (Refer

4.8.2). The MFV Reliant grounded on Sule Skerry to the south-west of the

Orkney Islands on 17 March. A light sheen of marine diesel was later

observed drifting downwind of the vessel. At the Sheriff’s Court in Kirkwall

on 18 January 2012 the skipper of the fishing vessel pleaded guilty of failing

to keep a proper lookout and was fined a total of £1,600 (Refer 4.9.2).

2.8 REPORTING EFFORT

2.8.1 The number of incident reports received from each of 11 reporting

organisations is shown in Table 7. The total number of reports received and

processed was 1,600 from which 669 separate incidents were subsequently

identified and entered into the 2011 database.

2.8.2 Observations from air surveillance patrols and a satellite surveillance

programme were employed to help identify discharges from vessels and

offshore oil and gas installations operating in the UKPCZ (Refer Section 4).

___________________________________________________

21

TABLE 7: TOTAL NUMBER OF INCIDENT REPORTS RECEIVED FROM EACH REPORTING ORGANISATION.

Reporting organisations Total number of

reports received

English and Welsh Local Authorities 138

Environment Agency for England and Wales 19

Inshore Fisheries and Conservation Authorities 14

Inshore Marine Fisheries Welsh Government 1

Northern Ireland Environment Agency 1

United Kingdom Ports 155

Maritime and Coastguard Agency (a) 662

DECC Offshore Environment Unit 519

Scottish Environment Protection Agency 15

Scottish Local Authorities 22

Scottish Society for the Prevention of Cruelty to Animals 54

Grand Total 1,600

(a) The figure provided includes duplicate PON 1 reports provided by DECC which form part of

the quality assurance process (Refer to Section 5).

22

SECTION 3: SUMMARY OF LARGER DISCHARGES (TWO TONNES

OR MORE) DURING 2011

(Refer to Section 4 and Appendix 1 for further details of each incident)

The figures given below are indicative of the reported volumes of releases confirmed in

written reports. However, incidents in which significant amounts of beach material were

mixed with pollutants, or where the volumes released were not indicated or measured, are

not included. The incidents are ordered according to spill size. Those that occurred over a

period of time have been included at the end of this section.

3.1 UKCS 10 November: E.ON Ruhrgas UK E&P Limited Hunter Pipeline (11-

UKCS/1630)

E.ON Ruhrgas UK E&P Limited reported an incident involving a release from the

Hunter Pipeline of 189,840 kg of methanol and 121.6 kg of KI-5351 due to a line

failure during an integrity pressure test. The pipeline was removed from service and

a replacement installed.

3.2 UKCS 13 January: Maersk Oil UK Limited NTvL (11-UKCS/1193)

Maersk Oil UK Limited reported an incident involving a release from the NTvL

installation of 88,800 kg of sodium chloride due to a failure of the transfer hose. The

hose was changed and all sections inspected.

3.3 UKCS 10 April: Dana Petroleum PLC Hudson Manifold (11-UKCS/1296)

Dana Petroleum PLC reported an incident involving a release from the Hudson

Manifold of 26,048 kg of Pelagic 100 due to a failed subsea hydraulic hose. Repairs

were completed and system leak test undertaken.

3.4 UKCS 21 November: unidentified vessel (12-UKCS/624)

The Byford Dolphin Mobile Offshore Drilling Unit (MODU) reported a surface

sheen 5 km to the east of the platform occupying an area of 5 km2 and with a

maximum estimated volume of 25 tonnes. The sheen later dispersed naturally.

3.5 UKCS 22 March: Maersk Oil UK Limited Donan FPSO Global Producer III

(11-UKCS/1268)

Maersk Oil UK Limited reported an incident involving a release from the Donan

FPSO Global Producer III of 21,905 kg of Castrol Transaqua HT2 due to a damaged

O ring within a subsea control module. The connector was replaced and no further

releases were reported.

3.6 UKCS 11 September: Dana Petroleum Limited Guillemot West (Triton) FPSO

(11-UKCS/1550)

Dana Petroleum Ltd reported an incident involving a release from the Guillemot

West (Triton) FPSO of 13,800 kg of Castrol Brayco Micronic SV/3 and 4,200 kg of

Cortron CK929-G due to a subsea chemical umbilical line becoming damaged

during trenching activities. Steps were taken to prevent a recurrence of the incident

(Refer to 3.11 and 3.16 for other discharges relating to this incident).

23

3.7 UKCS 11 July: BG plc Rowan Gorilla VI (11-UKCS/1445)

BG plc reported an incident involving a release from the Rowan Gorilla VI

installation of 15,400 kg of Carbosea due to an overflow of pollution pans beneath

the rig floor. New procedures, including visual checks of rotary housings and

pollution pans, were introduced to prevent a recurrence of the incident.

3.8 UKCS 4 August: Nexen Petroleum U.K Limited Ettrick FPSO Aoka Mizu (11-

UKCS/1487)

Nexen Petroleum UK Limited reported an incident involving a release from the

Ettrick FPSO Aoka Mizu of 13,110 kg of Transaqua due to a downhole leak which

was confirmed after a DSV survey.

3.9 UKCS 25 August: unidentified vessel (12-UKCS/593)

The Balmoral installation reported a weathered oil sheen with brown streaks and

white emulsion approximately 8 km to the south-east of the platform. The sheen

occupied an area of approximately 0.32 km2 with an estimated maximum volume of

10 tonnes. The sheen was broken up and dispersed by wave action.

3.10 UKCS 21 August: TAQA Bratani Limited Kestrel Subsea Field (11-UKCS/1519)

TAQA Bratani Limited reported an incident involving a release from the Kestrel

Subsea Field of 7.748 tonnes of hydraulic oil due to a subsea hydraulic hose

connection failure. Repairs were completed and visually checked by a ROV to

confirm no further release was occurring to sea.

3.11 UKCS 11 September: Dana Petroleum Limited Guillemot West (Triton) FPSO

(11-UKCS/1551) Dana Petroleum Limited reported an incident involving a release from the Guillemot

West (Triton) FPSO of 5,998 kg of methanol and 1,320 kg of FX2504 due to a

severed subsea chemical umbilical line caused by trenching activities. Amended

procedures and new controls were introduced to prevent a recurrence of the incident.

3.12 UKCS 1 March: Shell U.K. Exploration & Production Limited (NNS) Anasuria

FPSO (11-UKCS/1245) Shell UK Exploration & Production Limited (NNS) reported an incident involving a

release from Anasuria FPSO of 7,273 kg of Oceanic HW525 due to a solenoid

malfunction within the FPSO turret. The leak ceased after the solenoid was replaced.

3.13 UKCS 7 February: BG plc Armada (11-UKCS/1225)

BG plc reported an incident involving a release from the Armada installation of 7.16

tonnes of diesel after a drain valve was left open during a maintenance operation.

The diesel drain was isolated.

3.14 UKCS 20 July: Shell U.K. Exploration & Production Limited (NNS) Shearwater

A Wellhead (11-UKCS/1463)

Shell UK Exploration & Production Limited (NNS) reported an incident involving a

release from the Shearwater A Wellhead installation of 6,360 kg of Versatherm oil-

based drilling fluid due to a leak occurring during operations to test the retraction

status of the SW07 wellhead wear bush lock down pin. During this procedure the lock

down pin was accidentally ejected from the housing and the contents of the riser were

24

released into the immediate area and ultimately to the sea. Shell has committed to

eliminating the problem by improved design and in the interim has adapted its

procedures.

3.15 UKCS 11 March: BP Byford Dolphin (11-UKCS/1257)

BP reported an incident involving a release from the Byford Dolphin vessel of 5.1

tonnes of crude due to a pressure relief valve between the heater and separator

lifting prematurely during well test operations. The well was closed on the surface at

the choke manifold.

3.16 UKC 11 September: Dana Petroleum Limited Guillemot West (Triton) FPSO

(11-UKCS/1552) Dana Petroleum Ltd reported an incident involving a release from the Guillemot

West (Triton) FPSO of 2,064 kg of Flexoil WM1840 and 2,948 kg of mono-

ethylene glycol (MEG)/water mix due to a severed subsea chemical umbilical line

caused by trenching activities. Amended procedures and new controls were

introduced to prevent a recurrence of the incident.

3.17 UKCS 4 April: TAQA Bratani Limited Kestrel subsea completion P2 (11-

UKCS/1289)

TAQA Bratani Limited reported an incident involving a release from the Kestrel

subsea completion P2 of 4,941.1 kg of Castrol Brayco Micronic 86HT/200 due to a

leak on a subsea hydraulic line fitting. The leak was stopped after the faulty line

fitting was isolated.

3.18 UKCS 16 January: Talisman Energy UK Ltd Clyde (11-UKCS/1195)

Talisman Energy UK Limited reported an incident involving a release from the

Clyde installation of 4,600 kg of fire-fighting foam (1% AFFF-LF Aberdeen Foam)

due to the incorrect installation of the actuator on the AFFF/firewater isolation valve

which resulted in an incorrect indication of the valve position. The valve actuator

was later reinstalled in the correct orientation.

3.19 UKCS 9 November: Britannia Operator Ltd Britannia (11-UKCS/1628)

Britannia Operator Limited reported an incident involving a release from the

Britannia installation of 4,554 kg of EEHC1 due to an overflow from an expansion

drum in the cooling medium system. System improvements were completed to

prevent any recurrence of this release.

3.20 UKCS 25 July: TAQA Bratani Limited Tern (11-UKCS/1469)

TAQA Bratani Limited reported an incident involving a release from the Tern

installation of 2,000 kg of H2S Scav HSW85690 and 2,000 kg of SCW85594 after a

chemical was bunkered into an incorrect storage tank. During subsequent operations

bunkering hoses were checked to confirm that they were clearly marked with signs

indicating the chemical to be bunkered through them.

3.21 UKCS 17 August: unidentified vessel (12-UKCS/623)

The Brent Delta installation reported an oil sheen drifting towards the platform

occupying an area of 15 km2 and with an estimated maximum volume of 4 tonnes.

The sheen later dispersed naturally.

25

3.22 UKCS 30 November: Shell U.K. Exploration & Production Limited (NNS)

Brent D (11-UKCS/1661)


release from the Brent D installation of 3,601 kg of Class G Oilwell (Portland)

Cement and 3.68 kg of FP-16LG due to a cement batch tank overboard discharge

valve being left open. During subsequent operations the overboard line was locked

closed.

3.23 Irish Sea 10 September: MT NCC Amal (7-IS/619)

A split hose was identified as the cause of a 3-tonne palm oil spill from the tanker

NCC Amal (29,168 gt, built 2011) berthed at Liverpool’s Canada Dock. The oil was

contained within the dock system and later recovered.

3.24 UKCS 19 January: BP Exploration Operating Company Ltd Machar Manifold

(11-UKCS/1201)

BP Exploration Operating Company Limited reported an incident involving a release

from the Machar Manifold of 2,780 kg of Oceanic HW443-2 due to a solenoid in a

hydraulically actuated valve not fully opening allowing hydraulic fluid to be

released to sea via a return line. The valve was isolated to prevent any further

releases to sea.

3.25 UKCS 27 August: E.ON Ruhrgas Ensco 100 (11-UKCS/1526)

E.ON Ruhrgas reported an incident involving a release from the Ensco 100

installation of 2,500 kg of Versaclean oil-based mud due to a riser having been

inadvertently disconnected. The riser was then re-latched and sealed again, and the

connection was pressure tested before the operation continued.

3.26 UKCS 10 September: Nexen Petroleum UK Limited Ettrick FPSO Aoka Mizu

(11-UKCS/1547)

Nexen Petroleum UK Limited reported an incident involving a release from the

Ettrick FPSO Aoka Mizu of 2,300 kg of MEG and 71.1 kg of sodium nitrate due to

a failure of the bursting disc within the cooling medium system. A more robust type

of bursting disc was sourced and the closure speed of the valve was reduced. No

more failures have since been reported.

3.27 UKCS 30 June: Talisman Energy (UK) Limited Claymore A Platform (11-

UKCS/1425)

Talisman Energy (UK) Limited reported an incident involving a release from the

Claymore A installation of 2,273 kg of fire-fighting foam (3% Petroseal FFFP) due

to a leak in a deluge/foam system which flowed into open drains and ultimately to

sea. A short-term solution was implemented and in the longer term Talisman intends

to decommission, upgrade, and replace sections of its foam system.

3.28 UKCS 11 April: BP Exploration & Production (UK Offshore) Bruce PUQ (11-

UKCS/1298)

BP Exploration & Production (UK Offshore) reported an incident involving a

release from the Bruce PUQ installation of 2,045.1 kg of Scale Treat 8019 due to the

inappropriate isolation of a chemical injection system allowing scale inhibitor to be

drawn into topsides pipework then to sea via an open hazardous drains caisson. An

investigation was underway to determine the root cause of the release.

26

3.29 UKCS 15 December: Talisman Energy (UK) Limited Claymore A (11-

UKCS/1681)

Talisman Energy (UK) Limited reported an incident involving a release from the

Claymore A installation of 2,000 kg of fire-fighting foam (3% FFFP) due to an open

firemain/utility system cross-over. A short-term solution was implemented and in

the longer term Talisman intends to decommission, upgrade, replace sections of its

foam system.

UKCS INCIDENTS OCCURRING OVER AN EXTENDED PERIOD DURING 2011

The following reported UKCS incidents occurred over a period of time within the year.

In all cases where the source of the release was from subsea control equipment the fluids

lost were associated with oil and gas exploration and production operational processes. The

operator continued the release to maintain the integrity and functionality of the

wells/equipment until equipment and dive support vessels could be resourced to complete

the necessary repairs.

Each release required the operator to assess the potential environmental impacts associated

with the release. The operator in each case was required to provide regular updates on their

management plan as part of investigations being conducted by DECC. Where necessary,

meetings with the operator took place to discuss aspects associated with the incident.

Discussions included the type and volume of fluid being released, the potential

environmental impact and the operator’s short- and long-term plans to stop the release and,

where relevant, effect a final repair.

3.30 UKCS 1 January: Talisman Energy (UK) Limited Highlander

Template/Manifold (ongoing incident 11-UKCS/1609 from 26 December 2010)

Talisman Energy (UK) Limited reported an incident involving an ongoing release

from the Highlander HS 13 well, via the Tartan Alpha installations produced water

discharge, of 82,968 kg of Pelagic 100 and 42,850 kg of Pelagic 100 HV 45 due to a

failure of a SSSV seal. Talisman reduced the release rate by using a higher viscosity

hydraulic fluid and ultimately prevented further hydraulic fluid release by installing

a hold-open sleeve across the SSSV.

3.31 UKCS 1208 28 January: Shell U.K. Exploration & Production Limited (NNS)

Pierce FPSO (Haewene Brim) (ongoing from 28 January 2011 to 31 December

2011)


release from the Pierce FPSO (Haewene Brim) of 20,757 kg of Castrol Transaqua

HT2 due to a leak on the subsea annulus master valve. Until repairs are effected in

quarter 2 of 2013, the valve remains closed during normal operations and is only

opened when monitoring of annulus pressure is required thereby minimising the loss

of fluids.

3.32 UKCS 1 January: Enquest Heather Ltd Heather A (ongoing incident from 1

January 2007)

Enquest Heather Limited reported an incident involving the ongoing release from

the Heather A installation of 20,710 kg of Transaqua HT2. Further investigations

27

indicated a leak rate of 30 litres per day revised from 60 litres per day; this involved

a full investigation and review of valve performance criteria and hydraulic fluid

requirement for normal operations against what was originally on the PON15 permit.

The operator decided to block in the BR1 well and investigate possible solutions to

resolve this ongoing leak; however, this caused some reservoir stability problems

and the well was flowed again. An intervention and engineering solution has been

devised for the remaining 30 litres-per-day leak. The problem was fixed on 30

November 2012 and monitoring of levels are still continuing.

3.33 UKCS 1 January: Total E&P UK PLC Dunbar Nuggets (ongoing incident

UKCS/1416 from 15 July 2009)

Total E&P UK plc reported an incident involving an ongoing release from the

Nuggets subsea field tied back to the Dunbar installation of 16,335 kg of Oceanic

HW540 subsea hydraulic control fluid. Extensive subsea survey work and testing

eventually located the leak on the wing valve of a subsea ‘xmas tree’. Subsequent

diver intervention effected repairs and stopped further releases to sea.

3.34 UKCS 1 January: BP Exploration Operating Company Ltd Bruce PUQ

(ongoing incident UKCS/1628 from 21 December 2009)

BP Exploration Operating Company Limited reported an incident involving an

ongoing release from the Bruce PUQ of 14,539 kg of Oceanic 540W due to a

suspected hydraulic hose release subsea on the Bravo gas export isolation valve. At

the time of reporting investigations to identify the source of the release were

ongoing.

3.35 UKCS 12 October: CNR International FPSO Petrojarl Banff

(UKCS/1597)(ongoing from 12 October to 10 December 2011)

CNR International reported an incident involving an ongoing release from the FPSO

Petrojarl Banff of 11,594.45 kg of Pelagic 100 Production Control Fluid due to a

hydraulic fluid leak from a subsea isolation valve accumulator. CNR investigated

mitigation measures to reduce the leak rate, and planned for a ROV/DSV

intervention to resolve this issue. The release was ultimately stopped when the FPSO

Petrojarl Banff lost station during a storm in December 2011, and the vessel was

removed from the field.

3.36 UKCS 1 January: BG plc Seymour WHPS (ongoing incident UKCS/1564 from 7

December 2010)

BG plc reported an incident involving an ongoing release from the Seymour WHPS

installation of 8,400 kg of Transaqua HT2 due to failure of a hydraulic port plug

fitting. The well was suspended and a completely new well drilled at a different

location. The new well was fitted with a new xmas tree and SCM, the original

controls umbilical was re-routed and connected up to supply the new tree. Therefore

on completion of this well reconfiguration the previously reported leak was taken to

have been rectified. The original well remains suspended and has no connection to

the hydraulic system.

3.37 UKCS 24 October: Exxonmobil Nevis South Cluster (ongoing incident 11-

UKCS/1606 from 24 October 2011)

Exxonmobil reported an incident involving a release from the Nevis South Cluster of

7,648.7 kg of Oceanic HW 443 due to a hydraulic fluid leak from a subsea control

28

module (SCM). The SCM was replaced on 11 March 2012 and no further releases

were observed.

3.38 UKCS 1 January: Nexen Petroleum U.K Limited Ettrick FPSO Aoka Mizu

(ongoing incident 11-UKCS/1543 from 18 November 2010)

Nexen Petroleum UK Limited reported an incident involving an ongoing release

from the Ettrick FPSO Aoka Mizu of 5,410 kg of Transaqua due to a release from

subsea supply line connections. On 8 April DSV Acergy Osprey completed subsea

works including visual inspection of lines. No leaks were observed and the incident

was closed.

3.39 UKCS 1 January: CNR International Thelma Manifold (ongoing incident

UKCS/1178 from 23 June 2006)

CNR International reported an incident involving the ongoing release from the

Thelma Manifold of 2.972 tonnes of Brayco Micronic hydraulic fluid from 1

January 2011 to 31 December 2011 due to failure of the hydraulic system. CNR

undertook an investigation to analyse data to identify the source of the losses, and a

ROV/DSV intervention was planned to resolve this issue.

3.40 UKCS 1 January Talisman Energy (UK) Limited Clyde (ongoing incident

UKCS/1284 from 5 May 2010) Talisman Energy (UK) Limited reported an incident involving an ongoing release

from the Clyde installation of 2,120 kg of Castrol Transaqua HT2 due to a hydraulic

leak from the production wing valve actuator seal on a subsea well. An over-ride

actuator was installed to "piggy-back" the defective component during a DSV

intervention on 12 February 2011 which proved successful.

______________________________________

29

SECTION 4

ENUMERATION AREA SUMMARY REPORTS

4.1 North-east England

4.2 Eastern England

4.3 Essex & Kent

4.4 Southern England

4.5 South-west England

4.6 Bristol Channel & South Wales

4.7 Irish Sea

4.8 Western Scotland

4.9 Orkney & Shetland Islands

4.10 Eastern Scotland

4.11 UKCS (oil and gas installations and vessels)

30

4.1 North-east England (Northumberland, Tyne & Wear, Durham,

Yorkshire and The Humber)

4.1.1 Reporting organisations identified 9 pollution incidents attributed to vessels

during 2011 compared to 15 incidents during the previous year. All recorded

incidents were in ports and harbours and the polluting substances reported

included crude oil, fuel oils and hydraulic oils in quantities ranging from 5

litres to 25 litres.

4.1.2 At the Port of Tyne spill recovery equipment was deployed after a bucket of

bilge water overflowed on the deck of the MV Eems during a storm and

entered the River Tyne. A burst hose on an excavator boom caused a 25-litre

spillage of hydraulic oil from the backhoe dredger Maricavor (571 gt, built

1996) in the same location on 23 June. The oil was quickly dispersed by

mechanical agitation.

4.1.3 PD Teesport submitted details of 2 pollution incidents attributed to vessels

during 2011 compared to 4 incidents during 2010. The sand suction dredger

Sand Weaver (3,497 gt, built 1975) was identified as the source of a 5-litre

hydraulic oil spill on 23 January. Another hydraulic oil spill was attributed to

the workboat Tie Venture IV (71 gt, built 1993) in the same location on 6

April.

4.1.4 A POLREP and a Port of Sunderland report described a diesel oil discharge

from an unidentified fishing vessel at Greenwell Quays. The fishing cobble

Star of Hope sank in Seaton Sluice Harbour on 20 November. A surface

sheen was later observed on the water surface which later dispersed

naturally.

4.1.5 Three incidents were reported in the River Humber area during 2011.

Associated British Ports (ABP) Humber Estuary Services provided details of

a 15-litre crude oil spill from the MTANKER NS Consul (105,926 gt, built

2006) at the Tetney Mono Buoy on 22 February. The spill occurred during a

line-washing operation and the resulting surface sheen dispersed naturally. A

tug was identified as the source of a 25-litre oil discharge into the River

Humber on 16 November. The hopper dredger Heortnesse (604 gt, built

1959) reported a 10-litre lubrication oil leakage through a defective stern

gland at Hull. The incident occurred within an enclosed dock area and a

clean-up was completed by the vessel’s crew.

4.2 Eastern England (Lincolnshire, Norfolk & Suffolk)

4.2.1 Seven incidents were recorded during 2011, two fewer than the total

recorded during the previous year. Three discharges occurred in ports and

harbours, 2 in the open sea, 1 in nearshore waters and a significant beach

pollution incident was also reported. Accidental discharges from offshore oil

and gas installations operating off eastern England were included in the

statistics for the UKCS (Refer to 4.11).

31

4.2.2 The Eastern Inshore Fisheries and Conservation Authority (EIFCA) provided

details of a significant beach pollution incident in which blobs or larger

lumps of paraffin wax were found on beaches over a 100-km stretch of

coastline between Suffolk and East Norfolk from 1 January to September

2011. The source of the wax was believed to have been a discharge from an

unidentified vessel.

4.2.3 A satellite image alerted the authorities to a suspected oil discharge in the

open sea off Great Yarmouth on 1 May. A surveillance flight was tasked to

the area and confirmed the presence of small strips of sheen which could

have been part of a larger patch of oil. The Sean installation reported a

surface sheen attributed to an unidentified passing vessel on 19 September.

4.2.4 A workboat lost three 200-litre drums of lubrication oil overboard in

nearshore waters off Spurn Point on 16 September. Two of the drums were

punctured, releasing their contents into the sea where the oil was quickly

broken up and dispersed by wave action.

4.2.5 Elsewhere, pollution incidents were recorded in ports and harbours at

Boston, Grimsby and Lowestoft. A small diesel sheen was observed after a

pleasure craft sank at the entrance to Boston’s Black Sluice Lock on 23

April. A POLREP provided details of a diesel spillage from the survey vessel

Chartwell (106 gt, built 1989) at the Grimsby Fish Dock Marina. Absorbent

booms were deployed in a clean-up operation. Absorbent booms were also

deployed in a clean-up operation at Lowestoft following a 50-litre diesel spill

from a fishing vessel.

4.3 Essex and Kent

4.3.1 Twelve incidents were recorded by reporting organisations during 2011, the

same number as the previous year. Ten discharges occurred in ports and

harbours and 2 discharges in the open sea and nearshore waters. The source

of the pollution was identified on 11 occasions and there were 11 references

to fuel oils as polluting substances.

4.3.2 Port and harbour authorities reported vessel discharges at Dover, London,

Medway and Ramsgate. Four incident reports submitted by the Dover

Harbour Board described diesel oil spills of 1 litre or less from 3 P&O ferry

lifeboats and a pleasure craft. On each occasion the surface sheens dispersed

naturally and no further actions were required.

4.3.3 The general cargo vessel MV Nina 1 (998 gt, built 1984) was identified as

the source of a 6-litre diesel oil discharge in a report submitted by the Port of

London Authority. A subsequent investigation revealed that the spillage took

place because a scupper had not been blocked as oil was being transferred

forward to the vessel’s bow thruster tank. A successful prosecution was

brought under Section 131 of the Merchant Shipping Act 1995 and

magistrates imposed a fine of £12,391 on the vessel’s owner, the Baltnautic

Shipping Company Limited. A clean-up operation was required after the

MTUG Chieftain capsized and sank off Greenwich Pier on 12 August.

32

4.3.4 Peel Ports Medway recorded 3 pollution incidents during 2011. On 6 August

the MFV Sea Horse sank at Oare Creek near Faversham causing a 10-litre

lubrication oil spillage. The fishing vessel was later refloated and the oil

dispersed naturally. Back pressure in a fuel line was identified as the cause of

a 5-litre fuel oil spill from a pleasure craft on 9 September. A light fuel oil

sheen was observed after a fishing vessel sank at Queenborough Creek on 26

October.

4.3.5 A Ramsgate Port Authority report described a 25-litre diesel oil spill from

the MV Nab Cat 2 on 6 March. Absorbent booms and pads were deployed in

a clean-up operation. The incident was caused after a hose became

disconnected from a pump during a contaminated fuel removal operation.

4.3.6 On 11 July a marine pollution surveillance aircraft reported sighting a

surface sheen in the Dover Strait extending for 250 metres and with an

estimated maximum volume of 16.6 litres. A POLREP and a Kent County

Council report referred to an incident on 14 October after the motor cruiser

Layia Nija suffered a sudden ingress of water and was beached off Sandgate.

A ribbon of diesel oil was later observed in the vicinity of the wreck.

4.3.7 In addition a beach clean-up and recovery operation was carried out by

Dover District Council personnel after 5 five-litre plastic containers were

washed ashore after being lost overboard from a passing vessel. Each was

found to be in a leaking condition and partly filled with an unidentified green

viscous liquid.

4.4 Southern England (East and West Sussex, Hampshire, Dorset and the

Isle of Wight)

4.4.1 Reporting organisations identified 16 pollution incidents attributed to vessels

during 2011 compared to 28 incidents during 2010. Eleven recorded

incidents were in ports and harbours, compared to 20 during the previous

year, and there were 3 references to vegetable oil discharges. Sources of

pollution were identified on 15 occasions including 6 tankers and 4 pleasure

craft.

4.4.2 Four discharges in the open sea were attributed to chemical/oil tankers. Ten

reporting organisations provided details of an incident in which palm oil

residues were washed ashore along stretches of the Dorset, Hampshire and

West Sussex coastlines between 11 and 18 January. The residues were in the

form of small white pellets and larger yellow waxy balls and most were

removed by beach cleaning operations completed by local authority

personnel over several days. A back-track analysis indicated that the

pollution originated from the oil/chemical tanker Pretty Time (30,006 gt,

built 2007) whilst the vessel was engaged in tank-cleaning operations in the

Outer Nab Anchorage. The source was later confirmed by chemical analyses

which showed that palm oil samples taken from the vessel and the beaches

were the same. Following a prosecution brought by the Maritime and

Coastguard Agency at Southampton Magistrates’ Court, the owners of the

tanker were fined £20,000 with costs totalling £75,000.

33

4.4.3 A light oily film extending for 10 km was observed trailing in the wake of

the chemical/oil tanker Chemroad Quest (20,333 gt, built 2010) in the mid-

channel area on 11 January. Subsequent communications with the tanker

indicated a permissible discharge of soya bean oil residues in tank washings.

Another permissible discharge of vegetable oil in tank washings was

attributed to the chemical tanker Venezia D (6,875 gt, built 1998) on 24 May.

An accidental spillage of 20 litres of heavy fuel oil during an internal transfer

operation was reported by the chemical/oil tanker Sichem Palace (5,451 gt,

built 2004) in the English Channel on 14 June.

4.4.4 A POLREP provided details of a beach pollution incident after small lumps

of well-weathered oil were washed ashore in the Bexhill area during the

second week of February. Oil samples were analysed but the source of the

pollution could not be identified.

4.4.5 Oil discharges resulting mainly in surface sheens were reported in local ports

and harbours at Hayling Island, Lymington, Newhaven, Poole, Southampton,

and Weymouth. Chichester Harbour Conservancy provided details of a 2-

litre hydraulic oil spill from a pleasure craft at the Northney Marina. A clean-

up was quickly completed by marina staff. Lymington Harbour

Commissioners recorded 2 ten-litre diesel spills from pleasure craft during

2011. A crane barge was identified as the source of a 5-litre hydraulic oil

spill at Newhaven on 18 March and a clean-up operation was completed. A

70-litre hydraulic oil spill from the high-speed catamaran Condor Rapide

(5,007 gt, built 1997) berthed in Poole Harbour was broken up and dispersed

by propeller wash. A pleasure craft was identified as the source of a bilge oil

discharge in the same location on 15 August. An Environment Agency (EA)

report referred to a diesel oil spill from the high-speed catamaran Condor

Express (5,005 gt, built 1996) in Weymouth Harbour on 8 March.

4.4.6 Four incidents were recorded in the Port of Southampton during 2011.

Booms were deployed during a clean-up operation following a bunkering

spill from the multicat vessel Willendeavour (91.87 net tonnage, built 2007).

On 7 August the MFV Lilly Gina sank on her mooring in the River Itchen

and absorbent booms were deployed in a clean-up operation. Fareham

Borough Council and Hampshire County Council reports described a 30-litre

paraffin wax discharge from the oil/chemical tanker Nena K (4,218 gt, built

2009) berthed at the Fawley Refinery and a clean-up operation was

completed. A POLREP and a New Forest District Council report identified a

100-litre diesel oil spill from the chemical and product tanker Hans Scholl

(25,400 gt, built 2004) in the same location on 19 November. The spill

occurred during a loading arm disconnection operation and absorbent pads

and booms were deployed to recover the oil from the water surface.

4.4.7 In addition, a Havant Borough Council report referred to an incident in

which a 5-litre drum filled with sodium hypochlorite was washed ashore at

Sandy Point on 13 May.

34

4.5 South-west England (Devon, Cornwall, Isles of Scilly, Channel Islands

and the Western Approaches)

4.5.1 Seventeen vessel-source pollution incidents were identified by reporting

organisations during 2011 compared to 11 incidents during 2010. Seven

discharges occurred in local ports and harbours, 2 in the open sea and 5

discharges in nearshore waters and estuaries. A source of pollution was

identified on 12 occasions, the sources including 5 pleasure craft, 3 fishing

vessels and a general cargo vessel.

4.5.2 In the open sea, details of 2 oil discharges from vessels were provided by

POLREPS. A satellite image identified a small patch of oil in the English

Channel which was later confirmed as a fuel oil sheen by 2 passing vessels.

On 19 April a marine pollution surveillance aircraft detected visually and by

radar a surface sheen with an estimated maximum volume of 864 litres.

4.5.3 In nearshore waters the 15-metre gill netter Ben-My-Chree sank whilst under

tow in a semi-submerged condition off Gwennap Head on 11 March and a

diesel sheen was later observed floating on the surface above the wreck.

Another diesel sheen from a sunken pleasure craft was reported on 11 April

near Looe Island. A small boat ran aground on Porthbeor Beach in Cornwall

causing a spillage of 11 litres of petrol which quickly evaporated.

4.5.4 The EA carried out a successful clean-up operation on the Torridge estuary

following a diesel oil leakage from the derelict dredger/hopper barge

Panurgic moored on the foreshore. It was thought that the dredger was holed

as a result of corrosion and fuel escaped as it filled with water on an

incoming tide. Approximately 450 litres of diesel were recovered from the

vessel using a skimming device and absorbents. Another fuel recovery

operation was undertaken by the EA in the same locality following a diesel

leakage from the barge Southern Beaver moored near Appledore. The costs

of the operation were recovered from the vessel’s owner who was also issued

with a formal warning letter.

4.5.5 Two POLREPS described beach pollution incidents at Sennen Cove.

Globules of black, semi-solid emulsified oil ranging in size from 2cm to

25cm were removed from the high water mark of the beach on 9 January.

Similar black globules were washed ashore along the entire length of the

beach on 11 May.

4.5.6 Elsewhere, oil spills were recorded in ports and harbours at Falmouth,

Paignton, Penryn, Plymouth and St.Mary’s in the Isles of Scilly. A light

diesel sheen was dispersed by propeller wash following a bunkering spill

from the bulk carrier Mulberry Wilton (39,964 gt, built 2004) in Falmouth

Bay on 27 May. A written warning from the Harbour Master was later issued

to the Master of the vessel. Falmouth Harbour Commissioners described

another incident following a hydraulic oil spillage on the deck of the MFV

Bon Accord, where a small quantity escaped to sea through the scuppers of

the fishing vessel, and the crew sprayed detergent into the water to disperse

the oil. A written warning was later issued to the owner of the vessel by the

35

Harbour Master. A pleasure craft was believed to have been the source of a

bilge oil discharge in Paignton Harbour on 2 April.

4.5.7 Cornwall Council provided details of 2 diesel oil spills from pleasure craft

berthed in Penryn Harbour during 2011. The Yarmouth Navigator (116 gt,

built 1943), a decommissioned Royal Navy Motor Fishing Vessel, sank in

Plymouth Sound on 30 January and a diesel surface sheen was later observed

above the wreck site. A generator dismantling operation, in which fuel pipes

had been left open, was identified as the cause of a 4-litre diesel spill from

the passenger boat Blue Hunter in St Mary’s Harbour on 2 May. A clean-up

operation was completed by harbour staff using absorbent pads.

4.6 Bristol Channel and South Wales (Somerset, Bristol, Gloucestershire,

Monmouthshire, Newport, Cardiff, Vale of Glamorgan, Bridgend, Neath

Port Talbot, Swansea, Carmarthenshire and Pembrokeshire)

4.6.1 Eight accidental oil discharges from vessels were reported during 2011

compared to 6 discharges during the previous year. Seven incidents occurred

in ports or harbours. A source of the pollution was identified on each

occasion, including discharges from 4 fishing vessels, 2 tugs, a dredger and a

barge.

4.6.2 The Milford Haven Port Authority provided details of 6 incidents attributed

to vessels and a source of pollution was identified on each occasion.

Estimated volumes were provided for each of the discharges and the median

volume was 10 litres, compared to 4 litres during 2010. Individual spill

volumes ranged from 3 to 65 litres and clean-up operations were completed

on 5 occasions.

4.6.3 A burst pipe was identified as the cause of a 65-litre hydraulic oil spill from

the backhoe dredger Piet Ponton (262 gt, built 1987) on 16 March. The

resulting surface sheen was broken up and dispersed by propeller wash. A

tank overflow caused a 15-litre diesel spill from the beam trawler Den

Hoope 389 gt, built 2001) at Milford Dock on 8 December. Absorbent pads

were deployed during a clean-up operation following a 10-litre diesel spill

from the MTUG Flying Spindrift (259 gt, built 1986) on 22 March. The

cause of the incident was later identified as a tank overflow during an

internal oil transfer operation.

4.6.4 Elsewhere a POLREP provided details of a hydraulic oil spill from the work

barge Sarah Grey operating off Tenby. The 11-metre fishing boat Flowing

Tide II sank whilst alongside at Fishguard Harbour on 18 November

following an engine cooling water pipe failure. The vessel was later raised

and a small diesel sheen dispersed naturally.

36

4.7 Irish Sea (Ceredigion, Gwynedd, Isle of Anglesey, Conwy, Denbighshire,

Flintshire, Merseyside, Lancashire, Cumbria, Isle of Man and all

Districts of Northern Ireland)

4.7.1 Respondents identified 8 oil discharges, 2 chemical discharges and a palm oil

discharge from vessels during 2011 compared to 14 oil discharges during the

previous year. Six discharges in ports and harbours were reported, 4

discharges were in the open sea and a beach pollution incident was also

reported. Two spills were attributed to vessel casualties compared to 9 spills

during 2010. Details of accidental spills from oil and gas installations

operating in Morecambe Bay are included in the statistics for the UKCS

(Refer to 4.11).

4.7.2 Five incidents were recorded in the ports and harbours of north-west England

during 2011. An EA report described a 10-litre diesel spill from the MSV

Husvik Supporter (290 gt, built 1978) at Barrow in Furness on 19 May. A

clean-up operation was quickly completed and no further actions were

required. Whitehaven Harbour Commissioners provided details of a 500-litre

diesel spill from a fishing vessel on 20 May. The spill occurred in the non-

tidal North Harbour and a clean-up operation was completed on the same

day. A pleasure craft sank in Glasson Dock on 29 September causing a 1-litre

diesel oil spill. Absorbent booms and pads were deployed in a clean-up

operation and the vessel was later refloated. A split hose was identified as the

source of a 3-tonne palm oil spill from the tanker NCC Amal (29,168 gt,

built 2011) berthed at Liverpool’s Canada Dock and a clean-up operation

was completed. A hydraulic coupling leak under a stern ramp was identified

as the cause of a 50-litre hydraulic oil spill from the Ro-Ro container carrier

Atlantic Cartier (58,358 gt, built 1987) alongside Liverpool’s Seaforth

Terminal on 21 December. Contractors completed a clean-up operation

within the enclosed dock area and no oil entered the River Mersey.

4.7.3 A single incident was reported in the mid-Wales and North Wales area

during 2011. An EA report referred to a 10-litre diesel oil spill after a

pleasure craft sank in Fforyd Harbour on 3 March. The vessel was refloated

on the next incoming tide and the surface sheen dispersed naturally.

4.7.4 POLREPS provided details of 2 chemical discharges and 2 oil discharges in

the open sea. On 11 February a surface sheen was identified trailing in the

wake of the chemical tanker Brovig Bora (2,627 gt, built 2006). Subsequent

communications with the vessel determined a permissible discharge of tank

washings containing residues of the bio-diesel product, fatty acid

methylester. The chemical tanker Stolt Egret (3,853 gt, built 1992) was

identified as the source of another permissible fatty acid discharge on 19

July. On this occasion the surface sheen was detected by a marine pollution

surveillance aircraft and extended for a distance of 16.8 km with a maximum

estimated volume of 605 litres. The Douglas installation reported 2 surface

oil sheens attributed to unidentified passing vessels on 29 March and 18 July

and both were dispersed by wave action.

37

4.7.5 A Sefton Council report and a POLREP referred to a beach pollution incident

after lumps of oil were washed ashore between Formby Point and Birkdale

on 20 December. A clean-up operation was completed over 2 days and at

least 50 oiled birds including gulls and waders were observed.

4.8 Western Scotland (Dumfries and Galloway, Ayrshire, Inverclyde, Argyll

& Bute and the Highlands & Islands Region to Cape Wrath)

4.8.1 Reporting organisations submitted details of 18 vessel-source pollution

incidents compared to 9 during the previous year. Fourteen incidents in local

ports or harbours were reported and a fishing vessel was identified as the

source of pollution on 13 occasions. Further analysis of the information

contained in annual returns showed 6 oil spills following vessel casualties, 2

more than the total for 2010.

4.8.2 Vessel-casualty spills were recorded during January, June, August and

December 2011. On 31 January the French-registered stern trawler Jack

Abry II (840 gt, built 2005) grounded on the north coast of the Isle of Rum in

heavy weather carrying up to 140 tonnes of marine gas oil and 7,000 litres of

lubricating oil. Some oil was later observed around the vessel and in Kilmory

Bay, the oil being later broken up and dispersed by wave action. On 2

February the skipper of the vessel appeared in Stornoway Sheriff Court and

pleaded guilty to failing to maintain a proper lookout and was fined £3,000.

4.8.3 The fish-farm vessel Lady Laxford partially sank alongside Kinlochbervie

Harbour causing a 100-litre marine gas oil spill. Booms were deployed

around the vessel which was later re-floated. A small fishing vessel sank in

Bowling Harbour on 11 June. The prawn trawler Vellee (103 gt, built 1981)

sank in the middle of the Minch off Benbecula on 6 August and a light fuel

oil sheen and floating debris were later observed near the wreck site. During

adverse weather a decommissioned fishing vessel ran aground at Corpach on

9 December causing a 1-tonne diesel oil spillage. A clean-up operation was

required following a 100-litre diesel spill from a barge that sank in Rosyth

Docks on 21 December.

4.8.4 Reporting organisations identified at least 3 bunkering spills from fishing

vessels in ports during 2011 compared to 2 during the previous year. A

POLREP and a Highland Council Harbours report provided details of a 50-

litre diesel spill from the MFV Belinda in Uig Harbour. Absorbent booms

were deployed during a clean-up operation following a 30-litre bunkering

spill from the MFV Pierre Matigny in Lochinver Harbour on 11 July. The

third bunkering spill from a fishing vessel was recorded in the same location

on 3 August.

4.8.5 The Mallaig Harbour Authority submitted details of 3 oil pollution incidents

recorded during 2011 and the costs of clean-up operations undertaken by

harbour authority staff were charged to the owners of vessels. A Scottish

Environment Protection Agency (SEPA) report identified a burst hydraulic

pipe as the cause of a 20-litre hydraulic oil spill from Island Class ferry Eigg

(69 gt, built 1975) in Oban harbour on 17 February. A clean-up operation

38

was later completed by harbour staff. A local resident reported diesel oil

leaking from a decommissioned fishing vessel in poor condition berthed in

Rodel Harbour. Another decommissioned fishing vessel was identified as the

source of an oil sheen reported at Glencaple Quay on the River Nith. Booms

were deployed following an accidental discharge of gearbox oil from a

submarine at the Faslane Naval Base on 12 October.

4.9 Orkney and Shetland Islands

4.9.1 Five oil pollution incidents attributed to vessels were reported during 2011

compared to a single incident during 2010. Four incidents occurred in ports

and harbours and another in the open sea. Accidental spills from oil

installations operating in the West Shetland Basin were included in the

statistics for the UKCS (Refer to 4.11).

4.9.2 In the open sea the MFV Reliant grounded on Sule Skerry to the south-west

of the Orkney Islands on 17 March. A light sheen of marine diesel was later

observed drifting downwind of the vessel. At the Sheriff Court in Kirkwall

on 18 January 2012 the skipper of the fishing vessel pleaded guilty of failing

to keep a proper lookout and was fined a total of £1,600.

4.9.3 Three incidents were reported in Shetland during 2011 and on each occasion

the oil dispersed naturally. On 10 April a stern gland leak was believed to

have been the source of a slight sheen trailing behind the MFV Venture in

Sullom Voe Harbour. Another fishing vessel was believed to have been the

source of an oil sheen reported at Tofts Voe Pier on 23 April. A third oil

sheen was attributed to a discharge from the MFV Cornucopia at Brownies

Taing Pier on 22 June.

4.9.4 Orkney Islands Council Marine Services submitted a single report describing

a 200-litre diesel spill from the MFV Obsession in Kirkwall Harbour on 14

April. The oil was later recovered using absorbents in a clean-up operation.

4.10 Eastern Scotland (the northern and eastern shores of the Highlands and

Islands Region from Cape Wrath, Moray, Aberdeenshire, Angus, Fife,

Lothian and Scottish Borders)

4.10.1 Twenty-three discharges from vessels were recorded by reporting

organisations during 2011, six fewer than the previous year’s total. Analysis

of incidents by marine environmental zones showed 18 spills occurred in

ports and harbours, 3 in the open sea and 2 in nearshore waters. The source

of the pollution was identified on 20 occasions, sources including 9 fishing

vessels and 4 support/supply vessels, and there were 13 references to fuel

oils as polluting substances. At least 8 incidents were caused by vessel

casualties involving 7 fishing vessels and a rigid-hulled inflatable boat

(RHIB). No details were provided by respondents of any successful

prosecutions brought by the competent authorities during 2011.

4.10.2 Aberdeen Harbour Board provided details of 7 oil discharges during 2011

compared to 6 discharges during 2010. The source of each discharge was

39

identified and sources comprised 5 support/supply vessels, one dredger and

one freight ferry. Estimated volumes were provided for 6 discharges and the

median volume was 7.5 litres compared to 5 litres during the previous year.

On 23 September the multi-purpose offshore vessel Skandi Foula (3,252 gt,

built 2002) reported a 1-tonne diesel spill at the North Shell Quay. The area

around the vessel was immediately boomed off and skimmers were deployed

to recover the oil and none was reported outside the dock area. The cause of

the spillage was later identified as severe corrosion and consequently the

vessel was taken into dry dock to undergo repairs. A 30-litre bunkering spill

was reported by the standby safety vessel Grampian Protector (573 gt, built

1983) at the Pocra Quay on 26 April. A clean-up operation successfully

recovered the diesel oil and no further actions were required. The MFV New

Dawn reported a 10-litre diesel spill at the Commercial Quay on 4 October

and the sheen later dispersed naturally.

4.10.3 Four oil pollution incidents were reported by the Montrose Harbour

Authority during 2011 compared with 5 incidents during 2010. All incidents

were caused by accidental discharges of hydraulic oil from barges in

volumes ranging from 5 to 20 litres. A clean-up operation was completed by

contractors after each spill and no further actions were required.

4.10.4 Elsewhere, reporting organisations recorded 7 oil spills in ports and harbours

at Anstruther, Buckie, Cromarty, Dundee, Peterhead and Port Seaton. A Fife

Council report referred to a 100-litre spill of contaminated bilge water in

Anstruther Harbour from the MFV Reaper, which is part of the historic boat

collection managed by the Scottish Fisheries Museum. A clean-up operation

was carried out over 7 days using booms and absorbent materials. On 18

March the MFV Kestrel ran aground in Buckie Harbour causing a 27-litre

spillage of diesel oil. The vessel’s vents were plugged to prevent any further

release of oil and a clean-up operation was undertaken by contractors. Two

incidents were recorded in Cromarty Harbour during 2011 and both were

caused by diesel oil spills following fishing-vessel casualties. Absorbent

mats were deployed in a counter-pollution operation after the steel prawn

trawler Invader sank on 6 December. An oil sheen covering an area of

approximately 80m2 was observed after the prawn trawler Christine sank in

the same location on 29 December.

4.10.5 A SEPA report provided details of a counter-pollution operation in Dundee

Harbour following a diesel oil leak from a sunken former fishing vessel. A

boom was placed across the harbour but this failed to prevent a small

quantity of oil escaping into the River Tay. The MFV Miranda Faye sank at

the entrance to Peterhead Harbour on 9 September and the resulting diesel oil

sheen was broken up and dispersed by wave action. A POLREP described a

similar incident after the MFV Sea Spray sank in Port Seaton Harbour on 26

August.

4.10.6 Reporting organisations identified 5 oil discharges from vessels in the open

sea and in nearshore waters and all were broken up and dispersed by wave

action and posed no threat to the shoreline. A diesel sheen mixed with

flotsam was observed after the MFV Silver Rock sank in rough seas off

40

Lossiemouth on 24 February. The rigid-hulled inflatable boat (RHIB) North

Coast Explorer sank in Gloup Cave on West Stroma Island in the Pentland

Firth following an engine breakdown. A fishing vessel reported sighting a

rainbow sheen extending for 1 km off North Cove Harbour on 2 August and

on the same day a survey vessel reported sighting a dark slick in the open sea

which was later dispersed by wave action. On 31 August a marine pollution

surveillance aircraft operating in the open sea to the north of Fraserburgh

detected visually and by radar a surface sheen extending for 6 km with an

estimated maximum volume of 28 litres.

4.11 United Kingdom Continental Shelf

4.11.1 The discharge statistics for this enumeration area were again compiled from

POLREP reports submitted by the MCA and PON1 reports submitted by

DECC. Operators are required to notify DECC where an unauthorised

discharge of oil or chemical to sea, regardless of volume, has occurred. Each

discharge is reported on a PON1 to DECC’s Offshore Environmental

Inspectorate, MCA, the Joint Nature Conservation Committee (JNCC) and

Marine Scotland.

4.11.2 DECC reviews every PON1 that is received in order to assess the potential

for environmental impact and the need for any counter-pollution response

actions. In addition, each incident reported is reviewed to ensure actions are

being undertaken to prevent recurrence and to assess whether there has been

any contravention of legislation. This is undertaken in accordance with

DECC's investigation and enforcement policies.

4.11.3 Separate data sets have been presented for accidental discharges attributed to

offshore oil and gas installations and for discharges attributed to vessels,

whether identified or not, operating within the UKCS area (Refer to Figure

2).

Oil and gas installations

4.11.4 All accidental/unplanned discharges or spills of oil or chemicals, regardless

of volume, must be notified to the relevant authorities. Accidental discharges

of operational chemicals being used subsea as part of the exploration and

production process may take place over a significant period of time. In some

cases it may be many months before remedial work can be undertaken due to

the timescales involved in sourcing vessels and equipment to carry out the

work. Environmental risk assessments have shown that these events, which

are normally of relatively small volume, usually cause negligible impact on

the marine environment. Details of all discharges, including a cause when

known, are listed in Appendix 1 (UKCS oil and gas installations) and further

information is provided in Section 3 for those spills of 2 tonnes or more.

4.11.5 A total of 279 accidental oil discharges were attributed to oil and gas

installations during 2011 including those operating in the west Shetland

Basin, Liverpool Bay and off the coast of eastern England. The 2011 annual

total was the same number as the mean annual total of 279 accidental oil

discharges reported between 2000 and 2010.

41

4.11.6 Analysis of oil types showed that 33% of reported discharges were identified

as fuel oils, followed by 32% lubrication and hydraulic oils and 23% crude

oils. Estimated volumes for 279 oil spills were reported (including 3 ongoing

releases) and of these approximately 94% were less than 455 litres.

4.11.7 In addition, the authorities were notified of 240 accidental discharges of

chemical substances during 2011 compared with 167 discharges during the

previous year. These chemicals are routinely used in oil and gas exploration

and production operations and included barite, glycol solutions, methanol

and sodium.

4.11.8 The estimated volumes of accidental chemical discharges ranged from 0.001

kg to 189,840 kg and 44 discharges were 1 tonne or more. It should be noted,

however, that many of the larger discharges associated with operational

chemicals being used sub-sea occurred over an extended interval due to the

requirement for operators to source vessels and equipment to locate the

source of the release and undertake repairs. Further details are provided in

Section 3.

4.11.9 Of the total chemicals spilled in 2011 over 80% were considered under the

OSPAR list of substances used and discharged offshore as Posing Little or

No Risk to the Environment (PLONOR). None of the chemicals spilled are

included in the OSPAR list of chemicals for priority action, which are

considered to pose the greatest hazard. None of the spill incidents resulted in

a significant environmental impact.

4.11.10 The PON1 reports again indicated that remedial actions were taken by

operators following most accidental discharges. The responses included

identification of root causes of spills and improvements in operational

control procedures, recommendations concerning preventative actions and

carrying out any necessary repairs and modifications to faulty or damaged

equipment.

Vessels

4.11.11 A further 24 incidents were identified in POLREPS and PON1s. Most

involved surface sheens or thicker oil slicks reported by the nearest offshore

installation but attributed to a discharge from a ‘third party’ elsewhere that

was generally assumed to have been a passing vessel. The maximum

estimated volumes, where known, ranged from less than 1 litre to 25 tonnes.

In each incident the pollution was believed to have dispersed naturally

without posing a threat to wildlife or the coastline.

4.11.12 On 21 November a surface slick occupying an area of approximately 5 km2

with an estimated maximum volume of 25 tonnes was reported 5 km to the

east of the Byford Dolphin Mobile Offshore Drilling Unit (MODU). The

Balmoral installation and a passing fishing vessel reported a surface slick

with an estimated maximum volume of 10 tonnes on 25 August. Another

surface sheen occupying an area of approximately 15 km2 was observed

drifting towards the Brent Delta installation.

42

4.11.13 The multipurpose offshore installation vessel Saipem 7000 (117,812 gt, built

1987) reported a 29-litre hydraulic oil spill following a hose connector

failure on 3 June. On 12 June the MSV Vos Challenger (1,217 gt, built

1975) reported a 200-litre fuel oil spillage to sea through a purifier vent. The

oil was later broken up and dispersed by wave action. A burst line was

identified as the cause of a 4-litre biodegradable hydraulic oil spill from the

research/survey vessel Fairfield New Venture (2,192 gt. built 1986).

__________________________________________

43

SECTION 5: QUALITY ASSURANCE PLAN AND

ACKNOWLEDGEMENTS

5.1 Quality Assurance Plan

As part of a comprehensive quality assurance plan data verification procedures were

again applied at all stages during the 2011 survey. For example, other sources of

information were consulted including the casualty section of Lloyd’s List, and any

relevant reports were cross-referenced with the appropriate questionnaire returns.

The approaches for data entry and analysis were clearly shown in the relevant tables

and all entries to the enumeration area sub-sets were subject to independent checking

to detect any errors. On some occasions unexpected values were confirmed with the

various data-sources. Multiple reports were again received from DECC and MCA

describing accidental discharges from oil and gas installations operating on the

UKCS. For the remaining discharges from vessels 28% of individual incident reports

were compiled from questionnaire returns submitted by two or more reporting

organisations which was 6% more than the previous year.

As part of the quality assurance plan the complete database is provided for scrutiny in

Appendix 1 thereby enabling stakeholder groups to determine the reliability and

accuracy of the survey results. Furthermore, the annual survey reports are made

available to all interested parties through the MCA's website (www.dft.gov.uk/mca)

and the ACOPS website (www.acops.org.uk).

5.2 Acknowledgements

The Committee is again grateful to the following public agencies and other

organisations and their members for their contributions to the survey:

British Ports Association

Convention of Scottish Local Authorities

Department of Energy and Climate Change

Environment Agency

Inshore Fisheries and Conservation Authorities

Inshore Fisheries Welsh Assembly Government

Local Government Association

Maritime & Coastguard Agency’s Counter Pollution and Response Team

Northern Ireland Environment Agency

Royal Society for the Prevention of Cruelty to Animals

Scottish Environment Protection Agency

Scottish Society for the Prevention of Cruelty to Animals

United Kingdom Major Ports Group

______________________________________________

APPENDIX 1

SUMMARY OF REPORTED INCIDENTS

Key to types of vessels

MCT Chemical tanker

MFV Fishing vessel

MSV Offshore supply/support vessel

MT Oil tanker

MV General cargo vessel

PC Pleasure craft

RFA Royal Fleet Auxiliary vessel

RHIB Rigid-hulled inflatable vessel

RO-RO Roll-on roll-off ferry

1: NORTH-EAST ENGLAND (*Incident not identified by a POLREP)

Reference Date Location Category Type Amount Source Comments

*NE/461 23-Jan Teesport Oil Hydraulic 5 litres MDREDGER Sand Weaver Sheen dispersed naturally.

NE/004 22-Feb Tetney Mono Buoy Oil Crude 15 litres MT NS Consul Sheen dispersed naturally.

*NE/460 06-Apr Teesport Oil Hydraulic 6 litres MV Tie Venture IV Sheen dispersed naturally.

NE/008 11-Apr Port of Sunderland Oil Fuel Nk Fishing vessel Sheen dispersed naturally.

*NE/610 26-May Port of Tyne Oil Bilge 5 litres MV Eems Clean-up completed.

*NE/614 23-Jun Port of Tyne Oil Hydraulic 25 litres MDREDGER Maricavor Burst hose, clean-up completed.

NE/480 21-Jul Hull Oil Lubrication 10 litres MDREDGER Heortnesse Clean-up completed.

NE/481 16-Nov River Humber Oil Light 25 litres Tug Sheen dispersed naturally.

*NE/018 20-Nov Seaton Harbour Oil Lubrication 5 litres MFV Star of Hope Vessel sank causing slight sheen.

2: EASTERN ENGLAND (*Incident not identified by a POLREP)


*EE/066 01-Jan Norfolk & Suffolk coastline Other Paraffin wax Nk Unidentified vessel Investigation underway at time of reporting.

*EE/030 21-Feb Port of Lowestoft Oil Diesel 50 litres Fishing vessel Clean-up completed.

EE/034 23-Apr Port of Boston Oil Diesel Nk Pleasure craft Vessel sank at harbour entrance.

EE/477 01-May 52-36N: 02-42E Oil Nk Nk Unidentified vessel Sheen dispersed naturally.

EE/010 19-Jun Grimsby Fish Dock Oil Diesel Nk Survey vessel Chartwell Clean-up completed.

EE/012 16-Sep 53-33N: 00-07E Oil Lubrication 400 litres Workboat Nap 3 drums lost overboard, sheen dispersed naturally.

*EE/596 19-Sep 53-10N: 02-45E Oil Nk 50 litres Unidentified vessel Sheen dispersed naturally.

3: ESSEX AND KENT (*Incident not identified by a POLREP)


*EK/049 06-Mar Port of Ramsgate Oil Diesel 25 litres MSV Nabcat II Bunkering spill, clean-up completed.

*EK/053 13-May Port of Dover Oil Diesel 1 litre Lifeboat Sheen dispersed naturally.

*EK/055 10-Jun Port of Dover Oil Diesel 0.5 litres Lifeboat Sheen dispersed naturally.

EK/057 11-Jul 51-06N: 01-17E Oil Nk 16.6 litres Unidentified vessel Sheen dispersed by wave action.

*EK/058 13-Jul Port of Dover Oil Diesel 1 litre Lifeboat Sheen dispersed naturally.

*EK/562 04-Aug Port of London Oil Diesel 6 litres MV Nina 1 Spill during transfer operation.

EK/060 06-Aug Port of Medway Oil Diesel 10 litres MFV Seahorse Vessel sank and later refloated.

*EK/064 12-Aug Port of London Oil Diesel Nk MTUG Chieftain Vessel sank during towing operation.

*EK/065 27-Aug Port of Dover Oil Diesel 0.5 litres PC Jolly Fishermen Sheen dispersed naturally.

*EK/067 09-Sep Port of Medway Oil Fuel 5 litres Pleasure craft Marina bunkering spill, clean-up completed.

EK/069 14-Oct 51-04N: 01-09E Oil Diesel Nk PC Layia Nija Vessel sank, sheen dispersed naturally.

*EK/070 26-Oct Port of Medway Oil Fuel Nk Fishing vessel Vessel sank, sheen dispersed naturally.

4: SOUTHERN ENGLAND (*Incident not identified by a POLREP)


SE/090 10-Jan Outer Nab Anchorage Vegetable Palm oil Nk MCT Pretty Time Extensive beach clean-up operations required.

SE/096 11-Jan 50-07N: 02-06W Vegetable Soya Bean oil Nk MCT Chemroad Quest Permissible discharge, dispersed naturally.

SE/474 17-Jan Southampton Oil Diesel Nk MV Willendeavour Bunkering spill, clean-up completed.

SE/101 14-Feb Bexhill Oil Small globules Nk Unidentified Beach clean-up required.

*SE/103 08-Mar Weymouth Oil Diesel Nk HSC Condor Express Sheen dispersed naturally.

*SE/104 18-Mar Newhaven Oil Hydraulic 5 litres Crane Barge Doubler Clean-up completed.

SE/478 24-May 50-10N: 01-22W Vegetable Palm oil 40 litres MCT Venezia D Permissible discharge.

SE/112 14-Jun 50-17N: 00-15W Oil Heavy fuel 20 litres MCT Sichem Palace Sheen dispersed naturally.

*SE/113 10-Jul Lymington Harbour Oil Diesel 10 litres Pleasure craft Sheen dispersed naturally.

*SE/115 24-Jul Poole Harbour Oil Hydraulic 70 litres HSC Condor Rapide Clean-up completed.

*SE/116 05-Aug Lymington Harbour Oil Diesel 10 litres Pleasure craft Sheen dispersed naturally.

SE/119 07-Aug Southampton Oil Diesel Nk MFV Lilly Gina Vessel sank on mooring.

*SE/118 08-Aug Hayling Island Oil Hydraulic 2 litres Pleasure craft Clean-up completed.

*SE/122 15-Aug Poole Harbour Oil Diesel 1 litre PC Dawn Spirit Sheen dispersed naturally.

*SE/449 07-Sep Fawley Other Paraffin wax 30 litres MCT Nena K Clean-up completed.

SE/126 19-Nov Fawley Oil Diesel 100 litres MT Hans Scholl Clean-up completed.

5: SOUTH-WEST ENGLAND (*Incident not identified by a POLREP)


*SW/453 06-Jan Torridge Estuary Oil Diesel Nk MDREDGER Panurgic Clean-up completed.

SW/140 09-Jan Sennen Cove Oil Globules 100 litres Unidentified vessel Clean-up completed.

SW/141 30-Jan Plymouth Oil Diesel Nk MFV Yarmouth Navigator Vessel sank on mooring.

SW/144 11-Mar 50-01N: 05-40W Oil Diesel Nk MFV Ben-My-Chree Vessel sank, sheen dispersed naturally.

SW/145 02-Apr Paignton Harbour Oil Bilge Nk Pleasure craft Sheen dispersed naturally.

SW/476 09-Apr 49-47N: 03-32W Oil Fuel Nk Unidentified vessel Small patch of oil dispersed naturally.

SW/148 11-Apr 50-20N: 04-27W Oil Diesel Nk MFV Norvik Sheen dispersed naturally.

SW/149 19-Apr 50-30N: 05-58W Oil Nk 864 litres Unidentified vessel Floating sheen with tarry lumps.

*SW/154 02-May St Mary's Harbour Oil Diesel 4 litres Passenger boat Blue Hunter Clean-up completed.

SW/156 11-May Sennen Cove Oil Globules Nk Unidentified vessel Globules spread across whole beach.

SW/198 15-May River Taw Oil Diesel Nk MBARGE Southern Beaver Vessel aground, clean-up completed.

SW/153 27-May Falmouth Bay Oil Diesel Nk MV Mulberry Wilton Bunkering spill, clean-up completed.

*SW/160 22-Jul Penryn Harbour Oil Diesel Nk Pleasure craft Sheen dispersed naturally.

SW/161 03-Aug Porthbeaor Oil Petrol 11.4 litres Pleasure craft Vessel ran aground.

*SW/165 09-Sep Penryn Harbour Oil Diesel Nk Pleasure craft Sheen dispersed naturally.

*SW/166 20-Sep Falmouth Harbour Oil Hydraulic 1 litre MFV Bon Accord Clean-up completed.

*SW/167 23-Sep Salcombe Oil Bilge Nk Unidentified vessel Sheen dispersed naturally.

6: BRISTOL CHANNEL AND SOUTH WALES (*Incident not identified by a POLREP)


BC/189 27-Jan 51-40N: 04-42W Oil Hydraulic Nk Barge Sarah Grey Sheen dispersed naturally.

BC/190 18-Feb Milford Dock Oil Diesel 3 litres MFV Golden Promise Bunker overflow, clean-up completed.

*BC/192 24-Feb Milford Haven Oil Diesel 10 litres MFV Merlin Vessel partially submerged.

BC/195 16-Mar Milford Haven Oil Hydraulic 65 litres MDREDGER Piet Ponton Pipe failure, clean-up completed.

BC/196 22-Mar Milford Dock Oil Diesel 10 litres MTUG Flying Spindrift Clean-up completed.

*BC/201 20-Jul Milford Dock Oil Bilge 3 litres MTUG Svitzer Musselwick Clean-up completed.

*BC/458 18-Nov Fishguard Oil Diesel Nk MFV Flowing Tide II Vessel sank, sheen dispersed naturally.

*BC/208 08-Dec Milford Dock Oil Diesel 15 litres MFV Den Hoope Tank overflow, clean-up completed.

7: IRISH SEA (*Incident not identified by a POLREP)


IS/475 11-Feb 53-33N: 04-51W Chemical Fatty acid Nk MCT Brovig Bora Permissible discharge.

*IS/193 03-Mar Fforyd Harbour Oil Diesel 10 litres Pleasure craft Vessel refloated, sheen dispersed naturally.

*IS/577 29-Mar 53-34N: 03-24W Oil Nk 500 litres Unidentified vessel Sheen dispersed naturally.

*IS/231 19-May Barrow-in-Furness Oil Diesel 10 litres MSV Husvik Supporter Clean-up completed.

*IS/232 20-May Whitehaven Oil Diesel 500 litres Fishing Vessel Clean-up completed.

*IS/620 18-Jul 53-32N: 03-34W Oil Nk 60 litres Unidentified vessel Sheen dispersed naturally.

IS/234 19-Jul 52-44N: 05-21W Chemical Fatty acid 605 litres MCT Stolt Egret Sheen extending for 16.8 km.

*IS/619 10-Sep Liverpool Vegetable Palm oil 3 tonnes MT NCC Amal Split hose, clean-up completed.

*IS/237 29-Sep Glasson Dock Oil Diesel 1 litre PC Noggers Ark Vessel sank, clean-up completed.

IS/239 20-Dec Formby Oil Nk Nk Unidentified vessel Oil residues removed from 10 km beaches.

IS/240 21-Dec Liverpool Oil Hydraulic 60 litres MV Atlantic Cartier Coupling leak, clean-up completed.

8: WESTERN SCOTLAND (*Incident not identified by a POLREP)


WS/266 31-Jan 57-03N: 06-22W Oil Diesel Nk MFV Jack Abry II Vessel ran aground, oil dispersed naturally.

WS/265 31-Jan Kinlochbervie Harbour Oil Gas 100 litres Barge Lady Laxford Vessel partially sank, clean-up completed.

WS/269 17-Feb Oban Harbour Oil Hydraulic 20 litres Ro-Ro MV Eigg Burst pipe, clean-up completed.

*WS/272 31-Mar Lochinver Harbour Oil Diesel 20 litres Fishing vessel Clean-up completed.

*WS/274 11-Apr Mallaig Harbour Oil Fuel Nk Fishing vessel Clean-up completed.

WS/275 11-Apr Rodel Harbour Oil Diesel Nk MFV White Rose Sheen dispersed naturally.

*WS/276 02-May Mallaig Harbour Oil Fuel Nk Fishing vessel Clean-up completed.

WS/280 10-Jun Uig Pier Oil Diesel 50 litres MFV Belinda Hose burst, clean-up completed.

WS/622 11-Jun Bowling Harbour Oil Diesel 2 litres Fishing vessel Vessel sank, sheen dispersed naturally.

WS/279 15-Jun 58-25N: 05-25W Oil Nk Nk Unidentified vessel Dispersed naturally.

WS/281 11-Jul Lochinver Harbour Oil Gas 30 litres MFV Pierre Matigny Bunkering spill, clean-up completed.

*WS/286 27-Jul Mallaig Harbour Oil Fuel Nk Fishing vessel Clean-up completed.

WS/287 03-Aug Lochinver Harbour Oil Gas 30 litres MFV Jean Claude Coulon Bunkering spill, clean-up completed.

WS/289 06-Aug 57-28N: 06-59W Oil Fuel Nk MFV Vellee Vessel sank, sheen dispersed naturally.

*WS/525 12-Aug Glencaple Quay Oil Nk Nk MFV Alison Louise Sheen dispersed naturally.

*WS/526 12-Oct HM Base Faslane Oil Gearbox Nk HM Submarine Clean-up completed.

WS/297 09-Dec 56-50N: 05-07W Oil Diesel 1 tonne Fishing vessel Decommissioned vessel ran aground.

WS/483 21-Dec Clydeport Oil Diesel 100 litres MBARGE Leana Justina Barge sank, clean-up completed.

9: ORKNEY AND SHETLAND ISLANDS (*Incident not identified by a POLREP)


OS/327 17-Mar 59-05N: 04-25W Oil Diesel Nk MFV Reliant Vessel ran aground, light sheen dispersed naturally.

OS/329 10-Apr Sullom Voe Oil Light Nk MFV Venture Light sheen from possible stern gland leak.

*OS/523 23-Apr Tofts Voe Pier Oil Nk Nk MFV Craignair Sheen dispersed naturally.

*OS/462 14-Apr Kirkwall Oil Diesel 200 litres MFV Obsession Clean-up completed.

*OS/524 22-Jun Brownies Taing Pier Oil Nk Nk MFV Cornucopia Sheen dispersed naturally.

10: EASTERN SCOTLAND (*Incident not identified by a POLREP)


*ES/338 07-Feb Anstruther Harbour Oil Bilge 100 litres MFV Reaper Clean-up completed.

*ES/339 08-Feb Montrose Oil Hydraulic 5 litres MBARGE Reloader Clean-up completed.

ES/340 24-Feb 57-48N: 03-19W Oil Diesel Nk MFV Silver Rock Vessel sank, sheen dispersed naturally.

ES/341 18-Mar Buckie Harbour Oil Diesel 27 litres MFV Kestrel Vessel ran aground, clean-up completed.

*ES/344 25-Mar Aberdeen Harbour Oil Lubrication 3 litres MV Helliar Sheen dispersed naturally.

ES/349 14-Apr Aberdeen Harbour Oil Diesel 5 litres MSV Ocean Clever Bunkering spill, clean-up completed.

ES/353 26-Apr Aberdeen Harbour Oil Gas 30 litres MSV Grampian Protector Bunkering spill, clean-up completed.

*ES/357 15-May Montrose Oil Hydraulic 5 litres Barge Split hose, clean-up completed.

*ES/358 02-Jul Montrose Oil Hydraulic 20 litres Barge Clean-up completed.

ES/333 26-Jul 58-41N: 03-07W Oil Diesel Nk RHIB North Coast Explorer Vessel sank in cave.

ES/359 02-Aug 57-06N: 02-03W Oil Nk Nk Unidentified vessel Sheen dispersed naturally.

ES/360 02-Aug 56-10N: 02-10W Oil Nk Nk Unidentified vessel Slick dispersed naturally.

*ES/362 16-Aug Montrose Oil Hydraulic Nk Barge Clean-up completed.

ES/291 26-Aug Port Seaton Oil Diesel Nk MFV Sea Spray Vessel sank, sheen dispersed naturally.

ES/364 31-Aug 58-24N: 01-19W Oil Nk 28 litres Unidentified vessel Sheen extending for 6 km.

ES/369 09-Sep Peterhead Oil Diesel 45 litres MFV Miranda Faye Vessel sank, sheen dispersed naturally.

ES/372 23-Sep Aberdeen Harbour Oil Diesel 1 tonne MSV Skandi Foula Clean-up completed.

ES/376 04-Oct Aberdeen Harbour Oil Gas 10 litres MFV New Dawn Bunkering spill, sheen dispersed naturally.

*ES/377 11-Oct Aberdeen Harbour Oil Hydraulic 0.5 litres Dredger CW 6565 Sheen dispersed naturally.

ES/381 06-Dec Cromarty Harbour Oil Diesel 50 litres MFV Invader Vessel sank, clean-up completed.

ES/382 07-Dec Aberdeen Harbour Oil Diesel Nk MSV Ocean West Bunkering spill, clean-up completed.

*ES/527 27-Dec Dundee Harbour Oil Diesel Nk MFV Ocean Express Clean-up completed.

ES/384 29-Dec Cromarty Harbour Oil Diesel Nk MFV Christine Vessel sank, sheen dispersed naturally.

11: UKCS OIL AND GAS INSTALLATION ACCIDENTAL DISCHARGES.


UKCS/1180 01/01/11 60-48N: 01-26E Oil Crude 0.02 tonnes Ninian Southern Failure of instrument tubing.

UKCS/1181 04/01/11 53-34N: 01-58E Chemical Aqualink 300E 565 kg Audrey XW Loss of fluid from subsea hydraulic line.

UKCS/1182 05/01/11 58-06N: 01-26W Oil Diesel 0.005 tonnes Ross FPSO Diesel overflow from slops tank.

UKCS/1183 05/01/11 59-09N: 01-37E Chemical BOP control fluid 520 kg West Phoenix Blow Out Preventer hotline hose failure.

UKCS/1184 06/01/11 54-02N: 00-43E Oil Diesel 0.05 tonnes Cleeton CPQ Loose hose connection during bad weather.

UKCS/1185 08/01/11 58-13N: 01-06E Oil Crude 0.091035 tonnes Balmoral FPV Tilted plate separator produced water outlet.

UKCS/1186 08/01/11 58-13N: 01-06E Oil Diesel 0.0004 tonnes Balmoral FPV Leak on diesel bunkering hose connection.

UKCS/1187 08/01/11 53-48N: 01-43E Chemical Oceanic HW540 137 kg Neptune Subsea umbilical failure.

UKCS/1188 08/01/11 58-45N: 01-13E Chemical Oceanic HW443 90 kg JW McLean Failure of umbilical control line.

UKCS/1189 09/01/11 59-09N: 01-37E Oil Hydraulic 0.0008 tonnes West Phoenix Discharge through vent on accumulator tank.

UKCS/1190 10/01/11 56-43N: 01-18E Oil Diesel 0.00094 tonnes Curlew FPSO Failed valve on firepump diesel tank overflow line.

UKCS/1191 12/01/11 57-05N: 00-53E Chemical Methanol 160 kg Triton FPSO Failure of subsea chemical hose connection.

UKCS/1192 12/01/11 57-05N: 00-53E Chemical MEG 1443 kg Triton FPSO Corroded subsea umbilical line.

UKCS/1193 13/01/11 59-20N: 01-32E Chemical Sodium chloride 88800 kg NTvL Brine transfer hose failure.

UKCS/1194 14/01/11 57-17N: 02-10E Oil Unknown 0.001 tonnes Lomond Suspected open drains caisson.

UKCS/1195 16/01/11 56-27N: 02-17E Chemical Fire-fighting foam 4600 kg Clyde Failure of valves on foam storage system.

UKCS/1196 17/01/11 58-06N: 01-26W Oil Diesel 0.001 tonnes Ross FPSO Blockage of open drain system.

UKCS/1197 17/01/11 57-17N: 02-10E Oil Diesel 0.0022 tonnes Lomond Bunkering hose connection leak.

UKCS/1198 17/01/11 61-02N: 01-42E Chemical Oceanic HW443 100 kg Brent A Pinhole leak in hydraulic supply line.

UKCS/1199 19/01/11 54-02N: 00-43E Oil Diesel 0.0005 tonnes Cleeton CPQ Diesel draining operation.

UKCS/1200 19/01/11 57-48N: 00-58W Chemical TEG 220 kg Buzzard Fractured sight glass on cooling medium line.

UKCS/1201 19/01/11 57-17N: 01-39E Chemical Oceanic HW443-2 2780 kg Machar Manifold Failure of hydraulically actuated valve.

UKCS/1202 21/01/11 58-45N: 01-12E Chemical Nuto H plus 0.18 kg J W McLean Control fluid loss upon removal of subsea gauge.

UKCS/1203 22/01/11 56-50N: 02-15E Chemical Methanol 1 kg Jade Steel Failure of chemical injection valve.

UKCS/1204 23/01/11 58-02N: 01-08E Chemical TEG 9.4 kg Britannia Cooling medium pipework failure.

UKCS/1205 23/01/11 57-48N: 00-58W Chemical OBM mix 257 kg Galaxy III Annulus hose connection failure.

UKCS/1206 26/01/11 59-32N: 01-32E Oil Lubrication 0.009 tonnes Beryl A Oil leak via atmospheric vent line on tank.

UKCS/1207 27/01/11 58-06N: 01-26W Chemical HW 443 1000 kg Ross FPSO Fractured subsea hydraulic supply hose.

UKCS/1208 28/01/11 57-09N: 02-17E Chemical Transaqua HT2 20757 kg Pierce FPSO Leak on subsea annulus master valve.

UKCS/1209 28/01/11 57-22N: 01-59E Oil Hydraulic 0.00044 tonnes Marnock ETAP Failure of master valve actuator hydraulic oil seal.

UKCS/1210 28/01/11 56-41N: 02-20E Oil Diesel 0.0085 tonnes MSV Vos Provider Defective butterfly isolation valve.

UKCS/1211 29/01/11 61-16N: 01-35E Oil Diesel 0.001 tonnes Dunlin A Overfilling of diesel fuel tanks.

UKCS/1212 29/01/11 59-16N: 01-30E Chemical Erifon 818 20 kg Harding Failed seal on conductor tensioner cylinder.

UKCS/1213 31/01/11 56-29N: 02-09E Oil Crude 0.00188 tonnes Fulmar A Pump failure resulting in oil build up in caisson.

UKCS/1214 31/01/11 62-30N: 01-07W Chemical HoughtoSafe 273 1 kg Stena Carron Rupture disc burst on BOP stack tensioner.

UKCS/1215 31/01/11 58-45N: 01-12E Chemical Stack Magic 90 kg JW Mclean Failure of hose fitting.

UKCS/1216 01/02/11 57-11N: 01-00E Oil Crude 0.0228 tonnes Gannet A Produced water treatment upset due to chemical trial.

UKCS/1217 04/02/11 54-02N: 00-43E Oil Diesel 0.05 tonnes Cleeton CPQ Contents in bunkering hose dead leg released.

UKCS/1218 04/02/11 59-21N: 01-33E Chemical HW540 & Methanol 84.3 kg Gryphon A Damage to subsea hydraulic line.

UKCS/1219 04/02/11 59-21N: 01-33E Oil Crude 1.707 tonnes Gryphon A Production flowlines and risers damaged.

UKCS/1220 04/02/11 62-30N: 01-07W Chemical HR4L 260 kg Stena Carron Loss of containment from intermediate bulk container.

UKCS/1221 05/02/11 61-07N: 01-44E Chemical Milling fluid 15 kg Brent D Trip tank overflow.

UKCS/1222 06/02/11 57-43N: 01-45E Oil Hydraulic 0.00002 tonnes Forties Unity Drain valve on sump left open.

UKCS/1223 06/02/11 54-03N: 00-54E Chemical Corrtreat 7253B 60 kg Ravenspurn WT1 Vent failure on sight glass.

UKCS/1224 06/02/11 56-41N: 02-20E Chemical Engine antifreeze 22.26 kg Judy Leak from sight glass.

UKCS/1225 07/02/11 57-58N: 01-51E Oil Diesel 7.16 tonnes Armada Diesel drain valve left open after maintenance.

UKCS/1226 08/02/11 57-45N: 01-48E Oil Condensate 0.547 tonnes Everest North Condensate drain pipework failure.

UKCS/1227 10/02/11 61-16N: 00-55E Chemical Brayco Micronic V/3 82 kg Tern Platform Hydraulic hose failure.

UKCS/1228 11/02/11 59-32N: 01-32E Oil Lubrication 0.009 tonnes Beryl A Oil leak via atmospheric vent line on tank.

UKCS/1229 11/02/11 58-45N: 01-12E Chemical Oceanic HW443 15 kg JW McLean Failure of umbilical control line.

UKCS/1230 14/02/11 58-01N: 01-06E Chemical Stack Magic Eco & Glycol 14 kg Stena Spey Leak from slip joint load ring.

UKCS/1231 14/02/11 59-09N: 01-37E Chemical Glycol 255 kg West Phoenix BOP hotline control hose failure.

UKCS/1232 15/02/11 53-05N: 02-07E Oil Lubrication 0.00005 tonnes Leman AK Diesel spill during leak testing of lubricating oil drain system.

UKCS/1233 15/02/11 53-03N: 02-14E Oil Kerosene 0.03 tonnes Leman AD Fuel sample valve left open.

UKCS/1234 15/02/11 58-17N: 00-12E Chemical Ammonium Bisulphite 10 kg Scott JU Overfilling of chemical tank.

UKCS/1235 15/02/11 57-17N: 01-39E Oil Hydraulic 0.000024 tonnes Marnock ETAP Loose hydraulic hose fitting.

UKCS/1236 20/02/11 58-06N: 01-26W Oil Crude 0.01 tonnes Ross FPSO Blocked drain causing oil overflow to sea.

UKCS/1237 20/02/11 57-54N: 00-01E Chemical Aqualink 300-F V2 300 kg Buchan A Failure of quick dump valve on subsea well.

UKCS/1238 22/02/11 59-09N: 01-37E Chemical BOP Control Fluid 375 kg West Phoenix Incorrect valve operated.

UKCS/1239 23/02/11 58-14N: 01-34E Chemical ROV hydraulic fluid 3.8 kg Byford Dolphin Loose connection on ROV hydraulic hose.

UKCS/1240 24/02/11 59-09N: 01-37E Chemical BOP control fluid 867 kg West Phoenix Leak at BOP accumulator bottles.

UKCS/1242 25/02/11 58-02N: 01-08E Chemical TEG 224 kg Britannia Cooling medium discharged through platform drains.

UKCS/1243 27/02/11 61-21N: 01-34E Oil Aviation fuel 0.005 tonnes Thistle A Faulty diesel hose coupling.

UKCS/1244 27/02/11 61-21N: 01-34E Oil Diesel 0.001 tonnes Thistle A Seal failure of bunkering hose breakaway coupling.

UKCS/1245 01/03/11 57-15N: 00-48E Chemical Oceanic HW525 7273 kg Guillemot, Teal FPSO Anasuria Solenoid malfunction

UKCS/1246 02/03/11 53-57N: 00-35E Chemical HW540 31 kg Minerva Actuator valve seal failure.

UKCS/1247 03/03/11 53-32N: 01-15E Chemical Waste paint/thinners 17.5 kg Viking Field Container washed overboard during jacking operation.

UKCS/1248 04/03/11 59-16N: 01-30E Chemical Erifon 818 20 kg Harding Failed seal on conductor tensioner cylinder.

UKCS/1249 04/03/11 60-48N: 01-44E Oil Diesel 0.00001 tonnes Alwyn North Suspected release to drainage caisson.

UKCS/1250 04/03/11 57-27N: 01-23E Chemical AFFF foam 240 kg Montrose A Passing valve on deluge system.

UKCS/1251 06/03/11 61-23N: 01-44E Oil Waste 0.103 tonnes Murchison Leak on slop tank oil pump suction line.

UKCS/1252 06/03/11 60-21N: 04-04W Oil Hydraulic 0.0017 tonnes Foinaven DC2 Hose failure.

UKCS/1253 07/03/11 58-26N: 00-15W Chemical Baker OSW & Baker XC 369 kg Claymore A Failure of subsea chemical injection umbilical line.

UKCS/1254 08/03/11 58-17N: 00-12E Oil Hydraulic 0.04 tonnes Scott JU Failure of internal cooling coil on fire pump.

UKCS/1255 09/03/11 59-32N: 01-25E Chemical Stack Magic Eco F & MEG 874 kg GSF Arctic 3 Conduit line leak.

UKCS/1256 10/03/11 58-14N: 01-34E Oil Other 0.01 tonnes Byford Dolphin Flare drop out.

UKCS/1257 11/03/11 58-14N: 01-34E Oil Crude 5.1 tonnes Byford Dolphin Relief valve lifted prematurely.

UKCS/1258 12/03/11 60-48N: 01-44E Oil Diesel 0.0075 tonnes Alwyn North Open valve allowed diesel to flow to cuttings caisson.

UKCS/1259 13/03/11 56-27N: 02-17E Oil Crude 0.015 tonnes Clyde Leak on flange.

UKCS/1260 13/03/11 56-27N: 02-17E Oil Crude 0.0009 tonnes Clyde Leak on flange.

UKCS/1261 14/03/11 59-16N: 01-30E Chemical Erifon 818 3 kg Harding Seal failure on conductor tensioner.

UKCS/1262 14/03/11 57-27N: 01-23E Chemical Sodium Hypochlorite 0.34 kg Montrose A Fracture to pipework.

UKCS/1263 15/03/11 53-05N: 01-31E Oil Diesel 0.00418 tonnes Ensco 80 Seal leak on bunkering hose break away coupling.

UKCS/1264 17/03/11 57-05N: 00-53E Chemical Cortrone CK929-G 1 kg Triton FPSO Damaged hose connection.

UKCS/1265 19/03/11 60-41N: 02-32W Chemical TEG 1300 kg Clair Phase 1 Corroded pipework.

UKCS/1266 21/03/11 61-02N: 01-42E Oil Diesel 0.0042 tonnes Brent A Tank overflow during filling operation.

UKCS/1267 21/03/11 53-49N: 00-28E Oil Hydraulic 0.00425 tonnes Rough AP Release from hose within fire water pump house.

UKCS/1268 22/03/11 58-21N: 00-52E Chemical Transaqua HT2 21905 kg Donan FPSO Damaged O ring within subsea control module.

UKCS/1269 23/03/11 58-14N: 01-34E Chemical Oil based mud 236 kg Byford Dolphin Bunkering hose failure.

UKCS/1270 24/03/11 53-05N: 02-32E Oil Diesel 0.00688 tonnes Thames AP Diesel strainer seal failure.

UKCS/1271 24/03/11 60-48N: 01-44E Oil Diesel 0.000001 tonnes Alwyn North Diesel bunkering hose failure.

UKCS/1272 24/03/11 61-37N: 01-18E Oil Diesel 0.0613 tonnes Magnus Breach of diesel vent line.

UKCS/1273 25/03/11 59-16N: 01-30E Chemical Erifon 818 6.5 kg Harding Conductor tensioner cylinder seal leak.

UKCS/1274 25/03/11 53-32N: 01-21E Oil Diesel 0.025 tonnes Galahad Diesel bunkering hose failure.

UKCS/1275 25/03/11 53-45N: 00-38E Chemical HW540 & Aquaglycol 72 kg DSV Pelican Subsea hydraulic hose failure.

UKCS/1276 26/03/11 57-17N: 01-39E Oil Hydraulic 0.000024 tonnes Marnock ETAP Fractured hydraulic line.

UKCS/1277 26/03/11 57-17N: 01-39E Chemical Scale inhibitor 0.003 kg Marnock ETAP Release from chemical injection equipment.

UKCS/1278 27/03/11 57-17N: 01-39E Oil Crude 0.00024 tonnes Marnock ETAP Leak from flange and valve.

UKCS/1279 29/03/11 56-54N: 02-23E Oil Base oil 0.006 tonnes Rowan Gorilla VI Removal of drain plug.

UKCS/1280 29/03/11 53-05N: 02-07E Chemical MEG 5 kg Leman AP Pump failure resulting in overflow of slops tank.

UKCS/1281 01/04/11 58-52N: 01-31E Chemical Petrolite Scale Inhibitor 899.6 kg Brae East Overfilling of calibration sight glass.

UKCS/1282 02/04/11 61-14N: 01-08E Oil Lubrication 0.03 tonnes Cormorant North Lubricating oil leak within turbine enclosure.

UKCS/1283 02/04/11 57-45N: 01-48E Oil Condensate 0.032 tonnes Everest North Level control loss in tilted plate separator.

UKCS/1284 02/04/11 57-42N: 01-01E Chemical Environmental mud 161 kg Rowan Gorilla VII Restriction in return flow line to shaker.

UKCS/1285 03/04/11 53-11N: 02-51E Oil Condensate 0.0001 tonnes Sean PP Overflow from drains caisson.

UKCS/1286 03/04/11 61-03N: 01-42E Chemical Cement & EC2 383.8 kg Brent B Hammer lug blind cap failure.

UKCS/1288 04/04/11 59-21N: 01-33E Chemical Oceanic HW540 E 636 kg Gryphon A Hydraulic line failure.

UKCS/1289 04/04/11 61-13N: 00-55E Chemical Brayco Micronic 4941.1 kg Kestrel Subsea P2 Leak at subsea hydraulic line fitting.

UKCS/1290 06/04/11 54-12N: 02-27E Oil Hydraulic 0.00006 tonnes Caister Satellite Loss of containment from hydraulic accumulator.

UKCS/1291 07/04/11 57-54N: 00-36E Chemical Flowtreat DF 3159 5 kg Ettrick FPSO Failure of coupling on subsea chemical injection line

UKCS/1292 08/04/11 58-27N: 00-15E Oil Diesel 0.00019 tonnes Piper B Bunkering hose fitting failure.

UKCS/1293 08/04/11 57-17N: 01-39E Oil Hydraulic 0.000437 tonnes Marnock ETAP Loss of hydraulic fluid through vent pipe.

UKCS/1294 09/04/11 61-21N: 01-34E Oil Diesel 0.00041 tonnes Thistle A Hose split during bunkering.

UKCS/1295 10/04/11 61-16N: 01-35E Oil Crude 0.061 tonnes Dunlin A Leak on subsea production diverter valve.

UKCS/1296 10/04/11 61-15N: 00-44E Chemical Pelagic 100 26048 kg Hudson Manifold Failed subsea hydraulic hose.

UKCS/1297 11/04/11 53-50N: 00-26E Oil Unknown 0.000077 tonnes Rough CD Suspected leak from subsea safety valve.

UKCS/1298 11/04/11 55-44N: 01-40E Chemical Scale Treat 8019 2045.1 kg Bruce PUQ Failure of chemical injection pipework.

UKCS/1299 12/04/11 57-54N: 00-36E Chemical MEG 12 kg Ettrick FPSO Bursting disc ruptured.

UKCS/1300 12/04/11 58-47N: 00-12E Oil Hydraulic 0.002 tonnes Brae B Blocked drain.

UKCS/1301 13/04/11 59-09N: 01-37E Chemical Barite 100 kg West Phoenix Bunkering hose contents released during maintenance.

UKCS/1302 13/04/11 58-14N: 01-34E Chemical Oil based mud 628 kg Byford Dolphin Incorrect valve operation.

UKCS/1303 14/04/11 59-16N: 01-30E Chemical Erfon 818 22 kg Harding Seal failure on conductor tensioner.

UKCS/1304 14/04/11 57-53N: 01-23E Chemical Carbosea 2.2 kg Skandi Aker Residual mud released during wellhead cutting.

UKCS/1305 14/04/11 54-14N: 02-09E Oil Hydraulic 0.013 tonnes Boulton BM Leaking fitting on hydraulic hose.

UKCS/1306 14/04/11 57-00N: 00-00E Chemical Mobile DTE 15M 0.437 kg DSV Boa Deep C Puncture of subsea hydraulic line during grinding.

UKCS/1307 15/04/11 57-22N: 01-50E Oil Hydraulic 0.02 tonnes Elgin PUQ Corroded pipework on hazardous drain tank inlet line.

UKCS/1308 15/04/11 60-48N: 01-44E Oil Diesel 0.000468 tonnes Alwyn North Lifting Pressure Safety Valve caused discharge.

UKCS/1309 15/04/11 58-10N: 01-22W Chemical Oceanic HW443 15 kg Blake W1 North Leaking fitting on hydraulic line.

UKCS/1310 15/04/11 58-01N: 01-06E Chemical Inovert 147 kg Stena Spey Pressure Relief Valve lifted.

UKCS/1311 17/04/11 53-05N: 02-32E Oil Annulus oil 0.0001 tonnes Thames AW Leak from annulus vent point.

UKCS/1312 17/04/11 54-03N: 00-54E Oil Hydraulic 0.000061 tonnes Ravenspurn South B Leak from two uncapped hydraulic lines.

UKCS/1313 17/04/11 59-21N: 01-33E Chemical Oceanic HW540 E 84.8 kg Gryphon A Hydraulic line failure.

UKCS/1314 17/04/11 58-10N: 01-22W Chemical Oceanic HW443 10 kg Blake Manifold Leak on High Pressure hydraulic line fitting.

UKCS/1315 17/04/11 59-09N: 01-37E Oil Slops 0.000015 tonnes West phoenix Transfer hose caught in supply vessel propeller.

UKCS/1316 18/04/11 57-17N: 01-39E Oil Waste 0.0005 tonnes Marnock ETAP Contamination of storm drain during deck washing.

UKCS/1317 18/04/11 53-48N: 01-43E Oil Hydraulic 0.000076 tonnes Neptune Leak at hydraulic line fitting.

UKCS/1318 18/04/11 58-27N: 00-15E Oil Crude 0.0013 tonnes Piper B Leak from on valve body plug.

UKCS/1319 19/04/11 58-02N: 01-08E Chemical Transaqua HT2 25 kg Britannia Hydraulic hose failure.

UKCS/1320 19/04/11 57-09N: 02-17E Oil Lubrication 0.002 tonnes Pierce FPSO Release of lubricating oil via storm drain.

UKCS/1321 19/04/11 60-20N: 04-03W Chemical Tellus 22 1.5 kg Northern Canyon Burst seal on ROV hydraulic thrusters.

UKCS/1711 21/04/11 58-11N: 02-59W Chemical Oil based mud 500kg Jacky Leaking diverter/flow line seal

UKCS/1322 21/04/11 59-16N: 01-30E Chemical Erifon 818 3 kg Harding Conductor tensioner cylinder seal leak.

UKCS/1323 21/04/11 58-21N: 00-52E Oil Crude 0.0001 tonnes Donan FPSO Crude oil transfer hose seal failure.

UKCS/1324 22/04/11 59-16N: 01-30E Chemical Erifon 818 10 kg Harding Conductor tensioner hydraulic ram failure.

UKCS/1325 22/04/11 55-21N: 02-34E Oil Diesel 0.0004 tonnes Inde AP Split in diesel storage tank supply line caused by corrosion.

UKCS/1326 22/04/11 53-36N: 00-43E Oil Hydraulic 0.001 tonnes Amethyst A1D Leaking instrument fitting.

UKCS/1327 23/04/11 60-48N: 01-44E Oil Diesel 0.000105 tonnes Alwyn North Overfilling of tank.

UKCS/1328 25/04/11 61-36N: 01-18E Chemical Tellus 22 1 kg ROV Burst hydraulic hose.

UKCS/1329 25/04/11 57-19N: 01-04E Oil Hydraulic 0.0755 tonnes Gannet D Failure of subsea hydraulic flexible coupling.

UKCS/1330 26/04/11 61-15N: 00-42E Chemical Biocide XC85293 50 kg Tern Chemical umbilical line failure.

UKCS/1331 26/04/11 61-15N: 00-42E Oil Crude 0.085 tonnes Hudson Manifold Leak from a split in the fitting.

UKCS/1332 27/04/11 61-19N: 00-59E Chemical Base oil 127 kg Borgsten Dolphin Overflow of tank.

UKCS/1333 27/04/11 56-54N: 02-23E Chemical Magma-teq 67.63 kg Rowan Gorilla VI Overflow of ditch.

UKCS/1334 28/04/11 57-58N: 01-51E Oil Engine 0.00005 tonnes Ocean Nomad Oil pipework failure.

UKCS/1335 29/04/11 63-03N: 01-42E Chemical Caustic Soda & Proxel XL2 1.13kg Brent B Overflow of displacement tank.

UKCS/1336 02/05/11 63-03N: 01-42E Oil Lubrication 0.004 tonnes Brent B Leak from cement unit.

UKCS/1337 02/05/11 57-45N: 01-48E Chemical Cat Premix 50/50 15 kg Cats Riser Pipework leak.

UKCS/1338 03/05/11 58-17N: 01-48W Chemical WAW85202 Inhibitor 4 kg Captain WPP'A' Pin hole leak in bunkering hose.

UKCS/1339 04/05/11 54-02N: 00-43E Oil Condensate 0.00001 tonnes Cleeton Valve stem seal failure.

UKCS/1340 04/05/11 60-48N: 01-44E Oil Hydraulic 0.000004 tonnes Alwyn North Oil release to sea during cleaning operations.

UKCS/1341 04/05/11 53-48N: 01-43E Chemical Oceanic HW540 0.001 kg Neptune Leak at valve actuator.

UKCS/1342 05/05/11 61-19N: 00-59E Chemical Versaclean OBM 48 kg Borgsten Dolphin Failure of seal assembly on riser telescopic joint.

UKCS/1343 05/05/11 59-32N: 01-26E Chemical Stack Magic Eco F 184.1 kg GSF Arctic III Leak at BOP shuttle valve.

UKCS/1344 05/05/11 60-21N: 04-10W Chemical Safe Magic Eco F 3.18 kg Paul B Lloyd Junior BOP control hose failure.

UKCS/1345 05/05/11 57-17N: 02-10E Oil Unknown 0.000017 tonnes Lomond Open drains caisson.

UKCS/1346 06/05/11 58-27N: 00-15E Chemical Pelagic 100 350 kg Piper B Annulus wing valve leak.

UKCS/1347 08/05/11 61-05N: 01-43E Oil Waste 0.003 tonnes Brent C Overflow of hazardous drain.

UKCS/1348 08/05/11 53-26N: 01-53E Oil Hydraulic 0.12 tonnes Skiff Failure of actuator piston seal.

UKCS/1349 08/05/11 57-54N: 00-36E Chemical MEG 800.7 kg Ettrick FPSO Failure of bursting disc due to over pressurisation.

UKCS/1350 09/05/11 58-02N: 01-24E Oil Crude 0.006 tonnes Andrew Crude discharge via flare system.

UKCS/1351 10/05/11 58-02N: 01-08E Chemical Transaqua HT2 308 kg Britannia Leak on high pressure hydraulic unit.

UKCS/1352 10/05/11 60-41N: 02-32W Oil Hydraulic 0.0002 tonnes Clair Phase 1 Failed O-ring seal in control valve on hydraulic system.

UKCS/1353 11/05/11 60-37N: 01-39E Oil Hydraulic 0.004 tonnes Dunbar Hydraulic hose failure.

UKCS/1354 11/05/11 53-48N: 01-01E Oil Diesel 0.005 tonnes Hyde Seal failure on diesel driven generator.

UKCS/1355 11/05/11 59-36N: 01-30E Oil Hydraulic 0.002 tonnes Beryl B Overflow from hydraulic oil reservoir.

UKCS/1356 11/05/11 59-19N: 02-38E Oil Oily water 0.000172 tonnes Indefatigable Suspected oily water release from jacket leg.

UKCS/1357 13/05/11 57-05N: 00-57E Oil Hydraulic 1.1843 tonnes Gannet E & F Failure of subsea hydraulic equipment on towhead.

UKCS/1358 13/05/11 57-45N: 01-48E Oil Diesel 0.0007 tonnes Everest North Corroded diesel supply system pipework.

UKCS/1359 14/05/11 54-03N: 00-54E Oil Diesel 0.0009 tonnes Ravenspurn North Bunkering hose nozzle.

UKCS/1360 14/05/11 61-21N: 01-34E Oil Diesel 0.000055 tonnes Thistle A Overfilling of crane diesel tank.

UKCS/1361 14/05/11 57-17N: 02-10E Oil Waste 0.0005 tonnes Lomond Pin hole leak on process line.

UKCS/1362 14/05/11 57-09N: 02-17E Oil Crude 0.001 tonnes Pierce FPSO Failed valve during process flushing operations.

UKCS/1363 16/05/11 61-14N: 01-08E Oil Crude 0.01 tonnes Cormorant North Oil discharged through storm drains during deluge testing.

UKCS/1364 22/05/11 60-37N: 01-39E Oil Lubrication 0.000639 tonnes Dunbar Seal oil gun trigger not fully closed after operation.

UKCS/1365 23/05/11 59-16N: 01-30E Chemical Hyspin AWH-M-15 3.48 kg Harding Lubricating oil leak from wing valve actuator.

UKCS/1366 25/05/11 58-02N: 01-24E Chemical Solvent based paint 2 kg Andrew Tin of paint knocked over.

UKCS/1367 25/05/11 57-01N: 01-57E Oil Unknown 0.000254 tonnes Shearwater A Sheen source unknown.

UKCS/1368 26/05/11 57-44N: 00-54E Oil Waste 0.025 tonnes Forties FB Removal of flange during maintenance.

UKCS/1369 26/05/11 57-11N: 01-00E Chemical Corrtreat DF7314A 191 kg Gannet A Injection pump calibration pot overfilled.

UKCS/1370 27/05/11 58-17N: 00-12E Oil Lubrication 0.05 tonnes Scott South Bridge Punctured lubricating oil drum.

UKCS/1371 29/05/11 53-03N: 02-14E Oil Diesel 0.02 tonnes Leman AQ Split on diesel bunkering hose.

UKCS/1372 30/05/11 61-07N: 01-44E Oil Diesel 0.004 tonnes Brent D Pin hole leak on diesel bunkering filter.

UKCS/1373 31/05/11 53-48N: 01-43E Chemical Oceanic HW540 0.5 kg Neptune Leak on actuator of level control valve.

UKCS/1374 01/06/11 61-16N: 01-35E Chemical Methanol 26.88 kg Osprey Leak at flowline isolation valve.

UKCS/1375 01/06/11 61-16N: 01-35E Chemical Methanol 188.26 kg Osprey Leak at subsea flowline connector.

UKCS/1376 01/06/11 59-32N: 01-25E Chemical Oil based mud 35 kg GSF Arctic 111 Release from subsea wellhead.

UKCS/1377 02/06/11 58-13N: 01-06E Chemical Pelagic 100 724 kg Balmoral FPV Leak at subsea hydraulic valve.

UKCS/1378 02/06/11 60-21N: 04-10W Chemical Stack Magic ECO-F 3 kg Paul B Lloyd Junior Blow Out Preventer control hose failure.

UKCS/1379 03/06/11 61-21N: 01-34E Chemical Enviromul 35 kg Thistle A Failure of bunkering hose.

UKCS/1380 04/06/11 53-49N: 00-28E Oil Hydraulic 0.001 tonnes Rough AP Leaking joint on firepump hydraulic supply.

UKCS/1381 04/06/11 56-27N: 02-17E Oil Slops 0.0005 tonnes Clyde Platform Pinhole leak on slop oil pipework.

UKCS/1382 05/06/11 57-17N: 02-10E Oil Diesel 0.000004 tonnes Lomond Weep on corroded diesel line.

UKCS/1383 05/06/11 61-28N: 01-31E Chemical Stack Magic ECO F 13.6 kg John Shaw Leak at blow out preventer control pod.

UKCS/1384 06/06/11 53-21N: 01-18E Oil Condensate 0.002 tonnes Waveney Overflow of closed drains tank due to faulty level control.

UKCS/1385 07/06/11 56-43N: 02-01E Oil Hydraulic 0.1411 tonnes S7000 SSCV Hydraulic system seal failure.

UKCS/1386 08/06/11 58-52N: 01-31E Oil Mineral 0.002 tonnes Brae East Leak from cement unit.

UKCS/1387 08/06/11 56-29N: 02-09E Oil Diesel 1.4 tonnes Fulmar A Passing ballcock valve to storage leg with known leak.

UKCS/1388 08/06/11 54-01N: 01-06E Oil Hydraulic 0.004 tonnes Ravenspurn WT1 Bursting disc ruptured on accumulator pressurisation system.

UKCS/1389 10/06/11 54-04N: 00-54E Chemical Corrtreat 7253B 15 kg Ravenspurn North Leaking chemical injection pump seal

UKCS/1390 11/06/11 58-02N: 01-08E Chemical Sci foam EC7007A 0.63 kg Britannia Residual release during hose disconnection.

UKCS/1391 11/06/11 56-44N: 01-19E Oil Crude 0.0005 tonnes Curlew FPSO Release during exercise of valve on produced water system.

UKCS/1392 11/06/11 58-47N: 01-20E Oil Diesel 0.5 tonnes Brae B Overflow from storage leg.

UKCS/1393 11/06/11 60-37N: 01-39E Chemical Oceanic HW443 20 kg Dunbar Release from vent cap while applying isolation.

UKCS/1394 12/06/11 60-48N: 01-44E Oil Waste 0.00022 tonnes Alwyn North Discharge to sea due to drain blockage.

UKCS/1395 12/06/11 61-01N: 01-07E Oil Crude residue 0.001 tonnes Borgsten Dolphin Leak from slip joint packer.

UKCS/1396 13/06/11 53-49N: 00-28E Oil Diesel 0.26 tonnes Rough AD Overfill of firewater pump diesel tank.

UKCS/1397 13/06/11 61-37N: 01-18E Oil Crude 0.004 tonnes Magnus Pin hole leak on flowline.

UKCS/1398 13/06/11 58-26N: 00-15W Chemical Pelagic 100 1450 kg Claymore A Sheared subsea flexible hydraulic line.

UKCS/1399 14/06/11 58-02N: 01-08E Chemical Transaqua HT2 24 kg Britannia Wing valve hydraulic control line hose failure.

UKCS/1400 15/06/11 53-05N: 02-07E Oil Other 0.01311 tonnes Leman AD2 Failure of flow wing valve.

UKCS/1401 15/06/11 53-36N: 01-45E Chemical Innovert mud 26 kg MSV Julie Robertson Leak from deck of supply vessel.

UKCS/1402 17/06/11 56-27N: 02-17E Oil Hydraulic 0.111 tonnes Clyde Failed hydraulic line on platform crane.

UKCS/1403 17/06/11 56-27N: 02-17E Oil Hydraulic 0.01 tonnes Clyde Hydraulic tank overflow through vent.

UKCS/1404 18/06/11 57-58N: 01-14W Oil Crude 0.0275 tonnes Hummingbird FPSO Backflow of drains system to deck then spill to sea.

UKCS/1405 18/06/11 61-02N: 01-07E Chemical Versaclean UFG 124 kg Borgsten Dolphin Valve failed to re-seat after operation providing fluid pathway.

UKCS/1406 19/06/11 53-49N: 00-28E Oil Condensate 0.000586 tonnes Rough AD Leak from caisson vent pipework during installation.

UKCS/1407 19/06/11 61-07N: 01-44E Oil Hydraulic 0.113 tonnes Brent D Hydraulic hose failure on platform crane.

UKCS/1408 20/06/11 60-48N: 01-26E Chemical Gyptron SA1110N 500 kg Ninian Southern Leak on chemical storage tank.

UKCS/1409 21/06/11 60-48N: 01-26E Chemical Enviromil 4 kg Ninian Southern Oil Based Mud spill from bucket during draining of annulus.

UKCS/1410 21/06/11 58-06N: 01-26W Chemical HW 443 400 kg Ross FPSO Release of hydraulic fluid from subsea template.

UKCS/1411 22/06/11 61-02N: 01-07E Oil Hydraulic 0.01 tonnes Borgsten Dolphin Failed hydraulic seal in crane slew motor.

UKCS/1412 23/06/11 54-02N: 00-43E Oil Condensate 0.000008 tonnes Cleeton Leak from control valve stem.

UKCS/1413 23/06/11 61-02N: 01-07E Oil Hydraulic 0.01 tonnes Borgsten Dolphin Failed hydraulic seal in crane slew motor.

UKCS/1414 24/06/11 60-37N: 01-39E Chemical Oceanic HW443 1.04 kg Nuggets N1 Failure of subsea wing valve actuator.

UKCS/1415 24/06/11 53-50N: 00-26E Oil Condensate 0.00015 tonnes Rough BD Pressure transmitter bleed valve passing.

UKCS/1416 25/06/11 59-44N: 01-40E Oil Unknown 0.00318 tonnes Bruce D Source of sheen unidentified following review of activities.

UKCS/1417 25/06/11 60-33N: 01-56E Chemical HW443R v2 148.23 kg Islay Control fluid leak detected during testing operations.

UKCS/1418 27/06/11 60-44N: 02-29W Oil Hydraulic 0.5 tonnes Clair Ridge Seal failure on subsea pile hammer system.

UKCS/1419 27/06/11 58-26N: 00-15W Oil Diesel 0.002 tonnes Claymore A Leak within accessories compartment of generator.

UKCS/1420 27/06/11 61-14N: 01-08E Oil Oily water 0.01 tonnes Cormorant North Deluge testing resulting in overflow of hazardous drains tank.

UKCS/1421 28/06/11 59-31N: 01-24E Oil Condensate 0.01 tonnes Nevis South Cluster Leak at subsea well grease cap.

UKCS/1422 29/06/11 61-15N: 00-44E Chemical Pelagic 100 520 kg Hudson Subsea Manifold Leak on hydraulically actuated valve.

UKCS/1423 29/06/11 53-57N: 00-35E Chemical Oceanic HW540 928 kg Minerva Hydraulic solenoid valves not thought to have fully closed.

UKCS/1424 29/06/11 57-45N: 01-48E Chemical Oceanic HW540 0.5 kg Everest North Failure of production wing valve actuator seal.

UKCS/1425 30/06/11 58-26N: 00-15W Chemical Petroseal FFFP 2273 kg Claymore A Valve incorrectly opened.

UKCS/1426 02/07/11 57-48N: 00-58W Oil Waste 0.000041 tonnes Buzzard Overflow of hazardous drain tank.

UKCS/1427 03/07/11 60-48N: 01-44E Oil Waste 0.00126 tonnes Alwyn North Escape to sea during depressurisation of flare knockout drum.

UKCS/1428 03/07/11 58-02N: 00-57W Chemical Stack Magic ECO-F 10 kg Transocean Prospect Control fluid leak due to BOP pod seal failure.

UKCS/1429 03/07/11 58-06N: 01-26W Chemical Methanol 980 kg Blake Manifold Release from subsea chemical line.

UKCS/1430 05/07/11 60-48N: 01-44E Oil Diesel 0.000002 tonnes Alwyn North Pin hole leak on diesel bunkering hose.

UKCS/1431 05/07/11 58-02N: 01-24E Oil Condensate 0.0004 tonnes Andrew Passing valve on produced water degasser.

UKCS/1432 05/07/11 59-32N: 01-32E Oil Hydraulic 0.005 tonnes Beryl A Platform Leak on tell tale of hydraulic master valve.

UKCS/1433 05/07/11 58-22N: 00-04E Oil Hydraulic 0.01 tonnes Tartan A Emergency shut down valve hydraulic hose failure.

UKCS/1434 06/07/11 56-26N: 02-00E Oil Well bore fluids 0.3012 tonnes Ocean Princess Flare drop out during well testing.

UKCS/1435 08/07/11 59-16N: 01-30E Chemical Erifon 818 26 kg Harding Failed conductor tensioner system.

UKCS/1436 08/07/11 59-16N: 01-30E Chemical Erifon 818 9.5 kg Harding Failed conductor tensioner system.

UKCS/1437 08/07/11 57-45N: 01-48E Oil Diesel 0.002 tonnes Everest North Pressure safety valve passing on diesel distribution filter.

UKCS/1438 08/07/11 59-54N: 01-15E Oil Unknown 0.0001 tonnes Wilhunter Drain bung not in place.

UKCS/1439 09/07/11 61-16N: 00-55E Chemical Brayco Micronic 50 kg Tern Failed subsea hydraulic line fitting.

UKCS/1440 09/07/11 60-51N: 01-28E Chemical HW540v2 1558.2 kg Ninian Central Control line failure.

UKCS/1441 10/07/11 53-19N: 02-34E Oil Hydraulic 0.000088 tonnes Inde AQ O' ring failure on crane hydraulic hose.

UKCS/1442 10/07/11 57-22N: 01-50E Oil Hydraulic 0.2175 tonnes Elgin WHP Damaged fitting on hydraulic accumulator bottle.

UKCS/1443 10/07/11 58-21N: 00-52E Oil Hydraulic 0.11 tonnes Donan FPSO Hose fitting failure on hydraulic torque tool.

UKCS/1444 11/07/11 57-28N: 00-30E Oil Crude 1.5 tonnes Kittiwake A Overfilling of hazardous drains caisson.

UKCS/1445 11/07/11 56-54N: 02-23E Chemical Carbosea 15400 kg Rowan Gorilla VI Overflow of pollution pans under rig floor.

UKCS/1446 12/07/11 57-28N: 00-30E Oil Crude 0.8 tonnes Kittiwake A Oily water to be released from degasser to sea.

UKCS/1447 12/07/11 57-17N: 02-10E Oil Condensate 0.003 tonnes Lomond Pin hole leak on closed drains pipework.

UKCS/1448 12/07/11 60-49N: 04-08W Chemical MEG 56 kg Stena Carron Leak from BOP acoustic valve.

UKCS/1449 13/07/11 59-16N: 01-30E Chemical Erifon 818 22 kg Harding Failure of conductor tensioner hydraulic cylinder.

UKCS/1450 13/07/11 53-36N: 01-45E Oil Diesel 0.177 tonnes MSV Julie Robertson Supply vessel tank release after contact with installation leg.

UKCS/1451 14/07/11 61-16N: 01-35E Oil Crude 0.00001 tonnes Dunlin A Suspected gas release from C annulus.

UKCS/1452 15/07/11 56-27N: 02-17E Oil Waste 0.003 tonnes Clyde Overflow from oily water storage tank.

UKCS/1453 16/07/11 61-37N: 01-18E Oil Diesel 0.003 tonnes Magnus Release from crane pedestal drain point.

UKCS/1454 16/07/11 57-17N: 02-10E Oil Unknown 0.000141 tonnes Lomond Suspected drains caisson or spotting from sea bed.

UKCS/1455 16/07/11 60-49N: 04-08W Chemical MEG & Erifon HD603N 165 kg Stena Carron Hydraulic fluid release from BOP.

UKCS/1456 16/07/11 58-06N: 01-26W Chemical Oceanic HW443 170 kg Ross FPSO Failure of wing valve.

UKCS/1457 17/07/11 61-16N: 01-35E Chemical Glycol & Methanol 441 kg Osprey Valve left in open position.

UKCS/1458 18/07/11 56-27N: 02-17E Oil Crude 0.00417 tonnes Clyde Split in slop oil flexible hose.

UKCS/1459 18/07/11 61-19N: 01-32E Oil Brayco Micronic 0.07 tonnes MSV Seawell Loose hydraulic fitting on subsea control line.

UKCS/1460 19/07/11 59-16N: 01-30E Chemical Erifon 818 10 kg Harding Seal failure on conduction tensioner.

UKCS/1461 19/07/11 60-37N: 01-39E Chemical Biotreat 4632 0.5 kg Dunbar Biocide hose failure.

UKCS/1462 20/07/11 59-16N: 01-30E Chemical Erifon 818 12 kg Harding Seal failure on conduction tensioner.

UKCS/1463 20/07/11 57-01N: 01-57E Chemical Versatherm 6360 kg Shearwater A Release of Oil Based Mud from riser.

UKCS/1464 21/07/11 58-43N: 01-24E Oil Oil/antifreeze 0.001 tonnes Miller Release of fluid during lifting of bund.

UKCS/1465 24/07/11 60-21N: 04-10W Chemical Nuto 22 10 kg Viking Loss of hydraulic fluid from ROV.

UKCS/1466 24/07/11 53-26N: 02-19E Chemical Aqualink 300 E 836 kg Viking BA Subsea umbilical control line failure.

UKCS/1467 25/07/11 57-58N: 01-14W Chemical Methanol 243 kg Hummingbird FPSO Parting of compression fitting on methanol injection tubing.

UKCS/1468 25/07/11 59-44N: 01-40E Oil Base oil 0.000406 tonnes Bruce D Hose perforation during bunkering.

UKCS/1469 25/07/11 61-16N: 00-55E Chemical H2S Scav & SCW 85594 4000 kg Tern Chemical bunkered into incorrect storage tank.

UKCS/1470 26/07/11 61-02N: 01-07E Oil Base oil 0.2 tonnes Borgsten Dolphin Imbalance of fluids resulting in backflow to sea.

UKCS/1471 27/07/11 53-38N: 00-36E Oil Hydraulic 0.1 tonnes Amethyst C1D Damaged hydraulic hose.

UKCS/1472 28/07/11 61-29N: 01-27E Chemical Transaqua HT2 480 kg Don SW/Northern Leak at fitting on hydraulic control line.

UKCS/1473 28/07/11 61-29N: 01-27E Chemical Methanol 79 kg Don SW/Northern Leak at methanol subsea injection jumper.

UKCS/1474 30/07/11 60-35N: 01-48E Chemical HW540 900 kg Ellon and Grant SUTU Leak on high pressure hydraulic supply line.

UKCS/1475 30/07/11 57-00N: 01-50E Chemical EDC99 2.126 kg Rowan Viking Incorrect operation of choke and kill manifold valve.

UKCS/1476 30/07/11 59-44N: 01-40E Oil Diesel 0.005 tonnes Bruce PUQ Hose failure while topping up air compressor.

UKCS/1478 31/07/11 61-14N: 01-08E Oil Diesel 0.002 tonnes Cormorant North Overflow of storage tank due to faulty level indicator.

UKCS/1479 31/07/11 57-09N: 02-17E Oil Crude 0.01 tonnes Pierce FPSO Leak from pipework on subsea well.

UKCS/1480 01/08/11 61-14N: 01-08E Oil Hydraulic 0.02 tonnes Cormorant North Punctured hydraulic oil drum.

UKCS/1481 01/08/11 57-09N: 02-17E Chemical Transaqua HT2 60 kg Pierce FPSO Failure of poppet on hydraulic supply line.

UKCS/1482 02/08/11 58-16N: 01-14E Oil Crude 0.091 tonnes Ocean Princess Drop out from flare.

UKCS/1483 02/08/11 58-13N: 01-06E Oil Crude 0.181 tonnes Balmoral FPV Sheen suspected to be from subsea template manifold.

UKCS/1484 02/08/11 54-02N: 00-27E Chemical Versaclean OBM 57.5 kg Ensco 92 Pollution pan hose penetration seal failure.

UKCS/1485 03/08/11 59-16N: 01-30E Oil Diesel 0.000187 tonnes Harding Loose hammer joint on diesel bunkering hose.

UKCS/1486 03/08/11 61-21N: 01-34E Oil Diesel 0.008 tonnes Thistle A Overflow during bunkering operation.

UKCS/1487 04/08/11 57-54N: 00-36E Chemical Transaqua 13110 kg Ettrick FPSO Downhole hydraulic leak.

UKCS/1488 05/08/11 58-02N: 01-24E Oil Lubrication 0.00004 tonnes Andrew Lubricating oil seal failure.

UKCE/1489 07/08/11 58-47N: 01-20E Oil Condensate 0.04482 tonnes Brae B Overflow from WEMCO unit.

UKCS/1490 07/08/11 56-41N: 02-20E Chemical TEG 704 kg Judy Leak from flexible hose.

*UKCS/1491 10/08/11 57-05N: 00-57E Oil Crude * Gannet E & F Manifold *

UKCS/1492 10/08/11 60-21N: 04-03W Chemical Energol HLP HM68 3 kg Schiehallion FPSO Hydraulic motor seal failure.

UKCS/1493 10/08/11 59-16N: 01-30E Chemical Hydraway HVXA 0.1 kg MT Navion Norvegia ROV electronics box failure.

*UKCS/1494 10/08/11 57-05N: 00-57E Chemical Biocide 220 * Gannet E & F Manifold *

UKCS/1496 11/08/11 59-09N: 01-37E Oil Gear oil 0.316 tonnes Paul B Lloyd Jr ROV thruster gearbox seal failure.

UKCS/1497 11/08/11 54-03N: 00-54E Oil Waste 0.0001 tonnes Ravenspurn North Rainwater flushing of residues on deck.

UKCS/1498 11/08/11 59-44N: 01-40E Chemical Oceanic HW443 408.12 kg Bruce PUQ Line valve failure.

UKCS/1499 12/08/11 57-43N: 00-58E Oil Diesel 0.015 tonnes Forties FA Diesel bunkering hose failure.

UKCS/1500 12/08/11 53-42N: 02-51E Oil Hydraulic 0.2 tonnes Grove Wellhead Seal failure on choke valve actuator.

UKCS/1501 13/08/11 57-22N: 01-59E Oil Hydraulic 0.000875 tonnes Mungo Hydraulic returns control valve flange gasket failure.

UKCS/1502 14/08/11 61-06N: 01-04E Chemical SCW82146 350 kg Cormorant A Calibration drain pot valve accidentally left open.

UKCS/1503 14/08/11 61-21N: 01-34E Oil Waste 0.03791 tonnes Thistle A Failure of nozzle on skimmed oil tank.

UKCS/1504 14/08/11 59-32N: 01-25E Oil Hydraulic 0.00044 tonnes GSF Arctic III Leak from hydraulic supply flange coupling.

UKCS/1505 15/08/11 60-37N: 02-40W Chemical OBM slops 90 kg Byford Dolphin Hose failure.

UKCS/1506 16/08/11 53-02N: 02-22E Oil Hydraulic 0.348 tonnes Leman G Loss of containment within supply line to well wing valve.

UKCS/1507 16/08/11 58-18N: 01-46W Chemical Oceanic HW-540 800 kg Captain WPP'A' Leak from overpressured subsea hydraulic control valve.

UKCS/1508 16/08/11 60-48N: 01-44E Oil Oily water 0.000001 tonnes Alwyn North Leak from BOP lubricator cap during maintenance.

UKCS/1509 17/08/11 61-06N: 01-04E Oil Waste 0.01 tonnes Cormorant A Suspected oil release during jetting operations.

UKCS/1510 17/08/11 53-41N: 03-32W Chemical Oceanic HW540 3.9 kg Douglas FPSO Leak from subsea isolation valve.

UKCS/1511 17/08/11 57-09N: 02-17E Chemical Transaqua HT2 0.005 kg Pierce FPSO Subsea hydraulic fluid leak.

UKCS/1512 18/08/11 61-02N: 01-07E Oil Crude 0.01 tonnes Pelican Manifold Leak from flowline connector.

UKCS/1513 19/08/11 60-48N: 01-44E Oil Lubrication 0.00003 tonnes Alwyn North Lubricating oil hose failure.

UKCS/1514 19/08/11 57-05N: 00-57E Oil Crude 0.015 tonnes Triton FPSO Residual oil released from caisson.

UKCS/1515 20/08/11 61-14N: 01-08E Oil Lubrication 0.0045 tonnes Cormorant North Internal failure in lubricating oil system.

UKCS/1516 20/08/11 60-51N: 01-28E Oil Diesel 0.0009 tonnes Ninian Central Leak from diesel bunkering hose.

UKCS/1517 20/08/11 52-54N: 02-35E Oil Hydraulic 0.06 tonnes Horne High Pressure Unit hydraulic oil seal failure.

UKCS/1518 20/08/11 61-30N: 01-42E Chemical Caustic Soda & Proxel XL2 0.254 kg Brent B Spillage from trip tank.

UKCS/1519 21/08/11 61-16N: 00-55E Oil Hydraulic 7.748 tonnes Kestrel Subsea Field Failure of subsea hydraulic hose connection.

UKCS/1520 21/08/11 53-39N: 02-29E Chemical Hydraulic oil 38 kg Maersk Resilient Hydraulic system fitting failure.

UKCS/1521 23/08/11 58-52N: 01-31E Chemical EC6284A 7 kg Brae East Inadvertent opening of tank drain valve.

UKCS/1522 24/08/11 57-01N: 01-57E Oil Hydraulic 0.082 tonnes Shearwater A Hydraulic hose wing valve failure.

UKCS/1523 24/08/11 60-48N: 01-44E Oil Diesel 0.0092 tonnes Alwyn North Overflow from CETCO unit to sea.

UKCS/1524 26/08/11 61-07N: 01-44E Oil Diesel 0.0021 tonnes Brent D Leak from level measurement system on diesel storage tank

UKCS/1525 26/08/11 60-48N: 01-44E Oil Oily water 0.00106 tonnes Alwyn North Blocked drains resulted in oil release to sea.

UKCS/1526 27/08/11 57-35N: 01-38E Chemical Versaclean OBM 2500 kg ENSCO 100 Release following riser disconnection.

UKCS/1527 29/08/11 60-21N: 04-10E Chemical Nuto 22 3.03 kg Subsea Viking Flowline interface stab ring failure.

UKCS/1528 30/08/11 59-09N: 01-37E Chemical OBM & BOP fluid 853 kg Paul B Lloyd Junior OBM circulation system seal failure.

UKCS/1529 31/08/11 60-51N: 02-05W Chemical AWS 32 1 kg Wilphoenix ROV thruster motor gasket failure.

UKCS/1530 31/08/11 54-02N: 00-43E Oil Diesel 0.05 tonnes Cleeton CPQ Residue from diesel bunkering hose.

UKCS/1531 02/09/11 57-11N: 01-00E Oil Waste 0.0081 tonnes Gannet A Hazardous drains overflow.

UKCS/1532 02/09/11 61-19N: 01-32E Chemical Methanol 79 kg Osprey Seal failure on subsea well flowline connector.

UKCS/1533 03/09/11 58-25N: 00-19W Oil Waste 0.025 tonnes Scapa Oily water released whilst depressurising line.

UKCS/1534 03/09/11 57-48N: 00-58W Oil Diesel 0.000338 tonnes Buzzard Release from bilge pump during maintenance operation.

UKCS/1535 03/09/11 61-29N: 01-27E Chemical Transaqua HT2 572 kg Don SW&N Subsea hydraulic control system jumper connection.

UKCS/1536 03/09/11 58-03N: 01-04E Oil Residual 0.005 tonnes Alba Northern Overflow of deck drain.

UKCS/1537 04/09/11 53-48N: 01-43E Oil Hydraulic 0.0001 tonnes Neptune Hydraulic oil release from ROV.

UKCS/1538 04/09/11 60-18N: 04-20W Chemical Oceanic HW 443 33 kg Island Constructor Leak in Xmas Tree Cap Running Tool.

UKCS/1539 04/09/11 60-16N: 03-50W Chemical ROV hydraulic oil 0.5 kg Wilphoenix Detached pipe fitting on ROV.

UKCS/1540 04/09/11 60-35N: 01-48E Chemical Oceanic HW 443 940 kg Ellon A01 Subsea hydraulic system leak.

UKCS1541 05/09/11 60-57N: 00-56E Oil Condensate 0.001 tonnes Heather A Platform Condensate pump seal failure.

UKCS/1542 07/09/11 61-37N: 01-18E Chemical Lubrication oil 40 kg Magnus Internal failure of lube oil cooler.

UKCS/1543 09/09/11 57-06N: 00-53E Oil Hydraulic 0.005 tonnes Gannet Loose fitting on ROV hydraulic system.

UKCS/1544 09/09/11 60-21N: 04-03W Chemical TEG 0.3 kg Schiehallion FPSO Bulk loading hose flange/joint failure.

UKCS/1545 09/09/11 56-38N: 02-29E Oil Mineral 0.01 tonnes Maersk Resilient Oil cooler failure.

UKCS/1546 10/09/11 56-50N: 02-15E Oil Diesel 0.00086 tonnes Ensco 102 Parting of break away coupling.

UKCS/1547 10/09/11 57-54N: 00-36E Chemical MEG & Sodium Nitrate 2371.1 kg Ettrick FPSO Failure of bursting disc within cooling medium system.

UKCS/1548 10/09/11 56-41N: 02-20E Oil Residual 0.000426 tonnes Judy Oily water caisson underflow.

UKCS/1549 10/09/11 53-11N: 02-53E Oil Diesel 0.00706 tonnes Bessemer 49/23E Overflow of diesel tank during bunkering operation.

UKCS/1550 11/09/11 57-01N: 00-48E Chemical Brayco Micronic & Cortron 18000 kg Guillemot West FPSO Severed subsea chemical umbilical line.

UKCS/1551 11/09/11 57-01N: 00-48E Chemical FX2504 & Methanol 7318 kg Guillemot West FPSO Severed subsea chemical umbilical line.

UKCS/1552 11/09/11 57-01N: 00-48E Chemical Flexoil WM1840 & MEG 5012 kg Guillemot West FPSO Severed subsea chemical umbilical line.

UKCS/1553 12/09/11 61-07N: 01-44E Chemical Milling Fluid SG1.15 190 kg Brent D Milling fluid tank overflow.

UKCS/1554 13/09/11 60-16N: 03-50W Chemical MEG 1 kg Wilphoenix Release of BOP control fluid during daily check.

UKCS/1555 14/09/11 61-06N: 01-04E Oil Crude 0.01 tonnes Cormorant A Source of sheen not identified.

UKCS1556 14/09/11 53-27N: 01-55E Oil Hydraulic 0.07 tonnes Galleon PN Failure of piping compression fitting.

UKCS/1557 15/09/11 60-16N: 03-50W Chemical MEG 0.5 kg Wilphoenix Leaking O ring, Lockring or Valve Spring.

UKCS/1558 15/09/11 53-57N: 01-13E Chemical Oceanic HW540 v2 26.5 kg Babbage Platform Loose fitting of hydraulic line on well.

UKCS/1559 15/09/11 61-37N: 01-18E Oil Kerosene 0.04 tonnes Magnus Zone Cable snagging during recovery.

UKCS/1560 16/09/11 58-52N: 01-31E Oil Tection monograde 0.000021 tonnes Brae East Drip leak from portable bund.

UKCS/1561 18/09/11 60-16N: 03-50W Chemical Stack-Magic ECO-F v2 4 kg Wilphoenix Leak due to flexing of BOP hydraulic pod lines.

UKCS/1562 18/09/11 53-05N: 02-07E Chemical MEG 11 kg Leman AP Failure of the Discharge Pressure Gauge.

UKCS/1563 19/09/11 61-07N: 01-44E Oil Lubrication 0.003 tonnes Brent D Diesel generator exhaust.

UKCS/1564 21/09/11 53-23N: 02-00E Oil Waste 0.004 tonnes Loggs GGS Waste oil poured into wrong drain.

UKCS/1565 21/09/11 53-05N: 02-09E Chemical Expandol 3.3 kg Leman Charlie CP Spillage from platform vent system.

UKCS/1566 22/09/11 59-59N: 02-01E Chemical Versatherm 394 kg GSF Galaxy II Mud hose seal failure.

UKCS/1567 22/09/11 64-16N: 00-55E Oil Hydraulic 0.094 tonnes Tern Leak from flexible hydraulic hose.

UKCS/1568 23/09/11 59-54N: 01-15E Oil Diesel 0.0005 tonnes WilHunter Passing valve on flare burner.

UKCS/1569 23/09/11 60-51N:01-28E Chemical Calcium Bromide/Calcium Chloride 28.33 kg Ninian Central Leak in hard pipe during transfer.

UKCS/1570 24/09/11 61-07N: 01-44E Oil Diesel 0.00021 tonnes Brent D Gasket failure on diesel tank.

UKCS/1571 26/09/11 57-48N: 00-58W Oil Hydraulic 0.001 tonnes GSF Galaxy III Hydraulic hose failure.

UKCS/1572 27/09/11 56-43N: 01-18E Oil Diesel 0.00015 tonnes Curlew FPSO Diesel tank overfill.

UKCS/1573 27/09/11 59-32N: 01-32E Oil Lubrication 0.1 tonnes Beryl A Overflow from sump tank.

UKCS/1574 29/09/11 60-16N: 03-50W Chemical Diala 0.05 kg WilPhoenix Displacement of fluid from ROV bund.

UKCS/1575 30/09/11 56-23N: 02-15E Oil Crude 0.25 tonnes Noble Ton Van Langeveld Release of crude whilst flaring due to incorrect oil / water mix.

UKCS/1576 30/09/11 58-13N: 01-06E Oil Crude 0.001 tonnes Balmoral Template Suspected subsea valve movements.

UKCS/1577 30/09/11 57-54N: 00-36E Chemical MEG & Sodium Nitrate 355 kg Ettrick FPSO Failure of bursting disc within cooling medium system.

UKCS/1578 30/09/11 58-52N: 01-31E Chemical Oceanic HW 443 1157 kg Brae East Leak on hydraulic master valve.

UKCS/1579 30/09/11 58-23N: 00-05E Chemical Pelagic 100 48 kg Tartan North Terrace Production Master Valve actuator hydraulic leak.

UKCS/1580 01/10/11 52-59N: 01-50E Chemical Aqualink 300-F v2 1537 kg Hewett Well 48_30-8 Subsea hydraulic system leaks.

UKCS/1581 02/10/11 61-06N: 01-04E Oil Hydraulic 0.5 tonnes Cormorant A Subsea accumulator module hydraulic fluid leak.

UKCS/1582 02/10/11 53-48N: 01-43E Chemical Oceanic HW540 0.008 kg Neptune Instrument line hydraulic oil leak.

UKCS/1583 02/10/11 53-30N: 02-10E Chemical Aqualink 300-E v2 15 kg Alison Subsea control fluid released during recommissioning checks.

UKCS/1584 03/10/11 57-17N: 01-39E Oil Crude 0.00041 tonnes Marnock ETAP Pump discharge valve leak.

UKCS/1585 04/10/11 60-16N: 03-50W Chemical Stack-Magic ECO-F v2 2 kg WilPhoenix BOP pod umbilical hose leak.

UKCS/1586 04/10/11 57-48N: 00-55W Chemical Scaletreat DF 8206 300 kg Buzzard Leak from chemical supply pipework.

UKCS/1587 05/10/11 58-17N: 00-12E Oil Diesel 0.000033 tonnes Scott UQ Safe Open Drains Tank basket filter blockage.

UKCS/1588 06/10/11 57-54N: 00-36E Chemical MEG & Sodium Nitrate 411 kg Ettrick FPSO Failure of bursting disc within cooling medium system.

UKCS/1589 06/10/11 53-03N: 02-11E Oil Hydraulic 0.04 tonnes Leman E Choke valve hydraulic oil release.

UKCS/1590 07/10/11 61-37N: 01-18E Chemical Lubrication oil 147.9 kg Magnus Gas export lubricating oil cooler leak.

UKCS/1591 08/10/11 59-32N: 01-32E Chemical EC6359A 72 kg Buckland North Failure within subsea chemical distribution system.

UKCS/1592 08/10/11 60-41N: 02-32W Chemical TEG 220 kg Clair Phase 1 Heat exchanger leak.

UKCS/1593 08/10/11 53-50N: 00-26E Oil Condensate 0.000203 tonnes Rough BD Blocked drain causing overflow.

UKCS/1594 08/10/11 57-17N: 01-39E Oil Hydraulic 0.012 tonnes Marnock ETAP Crane winch hydraulic system overflow.

UKCS/1595 09/10/11 57-27N: 01-23E Oil Crude 0.00007 tonnes Montrose A Small hole in crossover pipework.

UKCS/1596 12/10/11 59-10N: 01-36E Chemical MEG 13.524 kg MSV Skandi Carla Release of chemical from vent line.

UKCS/1597 12/10/11 57-00N: 01-17E Chemical Pelagic 100 11594.45 kg Banff FPSO Subsea Isolation Valve accumulator hydraulic fluid leak.

UKCS/1598 13/10/11 53-49N: 00-28E Oil Hydraulic 0.000017 tonnes Rough AP Fire pump hydraulic oil leak.

UKCS/1599 13/10/11 59-16N: 01-30E Chemical Tellus 22 0.3 kg Harding ROV compensator hydraulic leak.

UKCS/1600 16/10/11 60-16N: 03-50W Chemical Stack-Magic ECO-F v2 0.5 kg WilPhoenix BOP hydraulic fluid release.

UKCS/1601 16/10/11 56-50N: 02-15E Oil Diesel 0.00085 tonnes Jade Steel Diesel released to sea after being blown from tundish.

UKCS/1602 17/10/11 57-45N: 01-48E Oil Hydraulic 0.263 tonnes CATS Riser Subsea hydraulic supply umbilical release.

UKCS/1603 22/10/11 58-13N: 01-06E Oil Diesel 0.311 tonnes Balmoral FPV Rupture of bunkering hose.

UKCS/1604 23/10/11 60-41N: 02-32W Chemical Furmanite FSC-12s 0.5 kg Clair Phase 1 Clamp seal failed during planned operation.

UKCS/1605 23/10/11 58-13N: 01-06E Chemical Pelagic 100 1062 kg Balmoral FPV Failure of shutdown logic to complete sequence.

UKCS/1606 24/10/11 59-31N: 01-24E Chemical Oceanic HW 443 7648.7 kg Nevis South Cluster Hydraulic fluid leak from subsea control module.

UKCS/1607 25/10/11 53-11N: 02-51E Oil Condensate 0.00006 tonnes Sean PP Drains caisson underflow.

UKCS/1608 27/10/11 57-50N: 00-21E Chemical Oil based mud 1.9 kg Transocean Prospect Misalignment of rig mud pit valve.

UKCS/1609 27/10/11 57-27N: 01-23E Oil Diesel 0.000002 tonnes Montrose A Diesel bunkering hose damage.

UKCS/1610 27/10/11 57-48N: 00-58W Chemical TEG 700 kg Buzzard Leak within heat exchanger.

UKCS/1611 30/10/11 61-05N: 01-43E Oil Diesel/Waste 0.039 tonnes Brent C Diesel transfer pump seal leak.

UKCS/1612 30/10/11 58-17N: 00-12E Oil Diesel 0.0001 tonnes Scott JD Diesel distribution pump weld crack.

UKCS/1613 30/10/11 53-03N: 01-55E Oil Hydraulic 0.0008 tonnes Leman to Bacton Pipeline Failed O-ring on ROV

UKCS/1614 31/10/11 60-16N: 03-50W Chemical Tellus 32 1 kg WilPhoenix ROV thruster dislodged from its mounting.

UKCS/1615 31/10/11 57-11N: 01-00E Oil Waste 0.2761 tonnes Gannet A Crude oil release as caisson overfilled.

UKCS/1616 31/10/11 54-02N: 01-12E Chemical Oceanic HW540 v2 220 kg Johnston Template Subsea solenoid valve stuck in an open position.

UKCS/1617 31/10/11 58-18N: 01-46W Oil Diesel 0.1 tonnes Captain WPP'A' Diesel bunkering hose leak.

UKCS/1618 31/10/11 53-13N: 02-49E Oil Hydraulic 0.000437 tonnes Sean RD Hydraulic oil line fitting failure.

UKCS/1619 01/11/11 56-57N: 01-48E Oil Unknown 0.00002 tonnes Rowan Gorilla V Investigation ongoing, source unknown.

UKCS/1620 03/11/11 59-44N: 01-40E Chemical Scaletreat 891 232 kg Bruce CR Partially opened valve allowed chemical to be released.

UKCS/1621 05/11/11 53-27N: 01-43E Oil Waste 0.005 tonnes Clipper PT Hazardous Drain Caisson overfill.

UKCS/1622 05/11/11 53-37N: 03-10W Oil Waste 0.0496 tonnes Lennox Closed drains drum vent carryover.

UKCS/1623 05/11/11 57-17N: 01-39E Oil Waste 0.00041 tonnes Marnock ETAP Closed drains pump leak.

UKCS/1624 06/11/11 58-02N: 01-08E Chemical Hyspin AWH M32 4.4 kg Britannia Hydraulic hose failure.

UKCS/1625 06/11/11 61-37N: 01-18E Oil Diesel 0.001204 tonnes Magnus Diesel bunkering hose leak.

UKCS/1626 07/11/11 57-45N: 01-48E Oil Hydraulic 0.989 tonnes Everest North Failure of subsea hydraulic supply system.

UKCS/1627 08/11/11 57-09N: 02-17E Oil Hydraulic 0.000002 tonnes Pierce FPSO Thruster pitch control hydraulic system leak.

UKCS/1628 09/11/11 58-02N: 01-08E Chemical EEHC1 4554 kg Britannia Cooling medium expansion drum overflow.

UKCS/1629 09/11/11 53-05N: 02-07E Chemical MEG 55 kg Leman AK Cooling Water Expansion Tank Relief Valve release.

UKCS/1630 10/11/11 54-14N: 02-23E Chemical Methanol & Kl-5351 189961.6 kg Hunter Pipeline Release from subsea pipeline during integrity pressure test.

UKCS/1631 10/11/11 54-14N: 02-23E Chemical MEG 1800 kg Hunter Pipeline Release from subsea pipeline during integrity pressure test.

UKCS/1632 11/11/11 60-48N: 01-44E Oil Unknown 0.00002 tonnes Alwyn North Oil release from open drainage system.

UKCS/1633 12/11/11 61-37N: 01-18E Chemical Oceanic HW443NDv2 1200 kg Magnus Failure of hydraulic fluid small bore pipework.

UKCS/1634 12/11/11 59-16N: 01-30E Chemical Hyspin AWH15 3 kg Harding Hydraulic control line failure.

UKCS/1635 13/11/11 57-48N: 00-58W Chemical Amine FX1662 11.5 kg Buzzard Amine pump gasket failure.

UKCS/1636 14/11/11 58-08N: 03-01W Oil Unknown 0.000002 tonnes Beatrice B Deck drainage overflow due to blockage.

UKCS/1637 15/11/11 60-18N: 04-16W Chemical HW540 47.7 kg Foinaven FPSO Subsea hydraulic connection leak.

UKCS/1638 16/11/11 57-00N: 01-19E Oil Diesel 0.00005 tonnes Banff FSU Diesel bunkering hose leak.

UKCS/1639 17/11/11 61-21N: 01-09E Oil Crude 0.0091 tonnes Eider Failure of crude oil cooler.

UKCS/1640 17/11/11 60-21N: 04-03W Chemical TEG 880 kg Schiehallion FPSO Pressure safety valve lifted due to high pressure.

UKCS/1641 17/11/11 58-30N: 03-06W Oil Hydraulic 0.0001 tonnes MV Island Intervention ROV hydraulic line fault

UKCS/1642 17/11/11 60-18N: 04-16W Chemical KI3310 2.2 kg Foinaven Chemical umbilical core leak.

UKCS/1643 19/11/11 59-44N: 01-40E Oil Hydraulic 0.002 tonnes Bruce D Flexible hydraulic hose connection leak.

UKCS/1644 19/11/11 61-14N: 01-08E Oil Crude 1.479 tonnes Cormorant North Failure of valve to reseat.

UKCS/1645 20/11/11 61-37N: 01-18E Oil Waste 0.0013 tonnes Magnus Hazardous drain blockage.

UKCS/1646 20/11/11 60-57N: 00-56E Oil Diesel 0.1 tonnes Heather A Leak from bunkering hose.

UKCS/1647 20/11/11 58-08N: 03-01W Chemical Brine-Pac XT 5.6 kg Beatrice B Brine bunkering hose leak.

UKCS/1648 21/11/11 59-16N: 01-30E Chemical Erifon 818 4.5 kg Harding Conductor tensioner hydraulic system seal failure.

UKCS/1649 21/11/11 57-22N: 01-50E Oil Lubrication 0.0042 tonnes Elgin PUQ Deck drainage overflow due to blockage.

UKCS/1650 21/11/11 61-21N: 01-34E Oil Diesel 0.0012 tonnes Thistle A Inadvertent opening of storage tank level control valve.

UKCS/1651 21/11/11 60-37N: 01-39E Oil Crude 0.06 tonnes Dunbar Residual oil deposits from deck carried to sea.

UKCS/1652 21/11/11 58-06N: 01-26W Chemical Oceanic HW 443 800 kg Blake Manifold Subsea hydraulic fluid leak..

UKCS/1653 22/11/11 57-10N: 00-56E Oil Unknown 0.000001 tonnes Gannet, Triton, Anasuria Unidentified sheen dispersed naturally.

UKCS/1654 26/11/11 58-17N: 00-12E Chemical Oceanic HW540 E 742 kg Scott Subsea A Subsea hydraulic system leak at water injection manifold.

UKCS/1655 27/11/11 56-50N: 02-15E Chemical Enviromul 43.8 kg Ensco 102 Annulus hose connection leak.

UKCS/1656 27/11/11 58-21N: 00-52E Oil Hydraulic 0.67 tonnes Donan FPSO Turret bearing lubrication system hydraulic oil leak.

UKCS/1657 28/11/11 58-21N: 00-52E Chemical MEG & Roemex X9103N 402 kg Donan FPSO Heat exchanger leak path between plates.

UKCS/1658 29/11/11 61-29N: 01-27E Oil Crude 0.346 tonnes Don SW/W & N Produced water system upset.

UKCS/1659 29/11/11 61-05N: 01-43E Oil Unknown 0.001 tonnes Brent C Suspected sheen from neighbouring installation..

UKCS/1660 29/11/11 58-22N: 00-04E Oil Diesel 0.4 tonnes Tartan A Diesel bunkering hose parted.

UKCS/1661 30/11/11 61-07N: 01-44E Chemical Cement & FP-16LG 3604.68 kg Brent D Cement batch tank overboard discharge valve open.

UKCS/1662 03/12/11 61-16N: 01-35E Oil Crude 0.005 tonnes Dunlin A Release from isolated pipework.

UKCS/1663 03/12/11 58-02N: 01-24E Oil Diesel 0.12 tonnes Andrew Diesel day tank overflow.

UKCS/1664 05/12/11 57-17N: 01-39E Oil Hydraulic 0.0175 tonnes Marnock ETAP Upper master valve hydraulic oil actuator seal failure.

UKCS/1665 05/12/11 60-57N: 00-56E Oil Unknown 0.05 tonnes Heather A Incorrect disposal of fluid.

UKCS/1666 06/12/11 58-02N: 01-08E Chemical Transaqua HT2 963 kg Britannia Manifold Master valve hydraulic system leak.

UKCS/1667 06/12/11 57-11N: 01-00E Oil Diesel 0.02 tonnes Gannet A Leak from diesel supply line to turbine.

UKCS/1668 07/12/11 57-54N: 00-01E Oil Slops 0.02586 tonnes Buchan A Produced water pump seal failure.

UKCS/1669 08/12/11 61-29N: 01-27E Chemical Gyptron SA3460 1673 kg Don SW/W & N Release of chemical through failure at subsea jumper.

UKCS/1670 09/12/11 57-09N: 00-37E Chemical Stack-Magic ECO-F v2 140 kg WilPhoenix BOP hydraulic pod line damaged.

UKCS/1671 09/12/11 56-57N: 01-48E Chemical Aqualink 300-F v2 613 kg Rowan Gorilla V BOP hydraulic fitting leak.

UKCS/1672 09/12/11 57-00N: 01-17E Oil Crude 1.812 tonnes Banff FPSO Riser parted from base after anchor loss.

UKCS/1673 12/12/11 58-13N: 01-06E Chemical Oceanic HW443R v2 37.43 kg Balmoral FPV Subsea hydraulic valve during function checking.

UKCS/1674 13/12/11 61-16N: 01-35E Oil Crude 0.003 tonnes Dunlin A Filter skid drain valve release.

UKCS/1675 13/12/11 57-10N: 01-26E Chemical Oceanic HW 443 457 kg Madoes Subsea Manifold Release of hydraulic fluid due to leak at annular wing valve.

UKCS/1712 13/12/11 57-17N: 01-39E Oil Hydraulic 0.015 tonnes Marnock ETAP Hydraulic oil hose failure.

*UKCS/1676 13/12/11 57-00N: 01-17E Chemical Pelagic 100 & RX-2055 * Banff FPSO Petrojarl *

*UKCS/1677 13/12/11 57-00N: 01-17E Chemical Methanol & HW540E * Banff FPSO Petrojarl *

*UKCS/1678 13/12/11 57-00N: 01-17E Chemical RX-5105 & RX-7014 * Banff FPSO Petrojarl *

UKCS/1679 14/12/11 53-01N: 01-47E Oil Diesel 0.1 tonnes Hewett 48/29A Bunkering hose split.

UKCS/1680 15/12/11 56-39N: 02-29E Chemical LTOBM 700 kg Maersk Resilient Tank dump valve left open.

UKCS/1681 15/12/11 58-26N: 00-15W Chemical FFFP 3% 2000 kg Claymore A Open firemain / utility system cross over.

UKCS/1698 15/12/11 53-50N: 00-26E Oil Diesel 0.000253 tonnes Rough CD Sheen suspected to be from platform caisson

UKCS/1683 17/12/11 53-01N: 00-56E Oil Hydraulic 0.2 tonnes Heather A Corrosion failure of lube oil pipework.

UKCS/1684 17/12/11 59-44N: 01-40E Chemical Oceanic 540W 212 kg Bruce PUQ Subsea hydraulic hose leak.

UKCS/1685 17/12/11 60-32N: 01-42E Chemical MEG & Stack-Magic 104.2 kg Sedco 714 BOP pilot lines partial failure.

*UKCS/1686 18/12/11 57-00N: 01-17E Oil Crude * Banff FPSO Petrojarl *

*UKCS/1687 18/12/11 57-00N: 01-17E Oil Crude * Banff FPSO Petrojarl *

UKCS/1688 18/12/11 53-01N: 01-47E Oil Hydraulic 0.2 tonnes Hewett 48/29 Failure of stainless steel compression fitting.

UKCS/1689 19/12/11 59-36N: 01-30E Oil Diesel 0.0637 tonnes Beryl B Valve partially open on diesel filter drain.

UKCS/1690 19/12/11 60-41N: 02-32W Oil Waste 0.001 tonnes Clair Phase 1 Oil overflow from hazardous drain sump.

UKCS/1691 19/12/11 53-27N: 01-43E Oil Hydraulic 0.007 tonnes Clipper PC Crane hydraulic hose burst.

UKCS/1692 20/12/11 58-11N: 00-07E Oil Crude 0.0183 tonnes Rob Roy RP58 Release of crude from suspended well tree cap.

UKCS/1693 22/12/11 57-09N: 00-37E Chemical Stack-Magic ECO-F v2 2.5 kg WilPhoenix Leak on subsea accumulator system.

UKCS/1694 22/12/11 59-36N: 01-30E Oil Diesel 0.012 tonnes Beryl B Release from open drains caisson.

UKCS/1695 26/12/11 58-22N: 00-04E Oil Crude 0.007 tonnes Tartan A Vent line left open at pig launcher.

UKCS/1696 26/12/11 58-19N: 00-41E Chemical Aqualink 300-F v2 1 kg MacCulloch Manifold Release of hydraulic fluid from subsea production valve.

UKCS/1697 26/12/11 60-53N: 01-16E Chemical Oceanic HW540 E 216.2 kg Lyell Manifold Subsea hydraulic system leak.

UKCS/1699 28/12/11 57-11N: 02-12E Chemical Versaclean CBE 0.000253 tonnes Transocean Sedco711 Leak on oil based mud transfer pipework.

UKCS/1700 30/12/11 60-48N: 01-44E Oil Diesel 0 000225 tonnes Alwyn North Bunkering hose parted.

UKCS/1701 31/12/11 60-54N: 01-25E Oil Lubrication 0.1 tonnes Ninian Northern Failure of instrument pipework.

*The incidents highlighted above are subject to further DECC review and, therefore, the missing information will be provided in the next annual report.

**ONGOING RELEASES

Date of initial release Location Category Type Amount Source Comments

26/06/2006 58-30N: 01-15W Oil Hydraulic 2.972 tonnes Thelma Manifold Failure of hydraulic system.

01/01/2007 60-57N: 00-56E Chemical Transaqua HT2 20710 kg Heather A Cause still to be determined.

15/07/2009 60-37N: 01-39E Chemical Oceanic HW540 16335 kg Nuggets N1 Subsea hydraulic control system.

21/12/2009 59-44N: 01-40E Chemical Oceanic 540W 14539 kg Bruce PUQ Suspected hydraulic hose leak subsea.

05/05/2010 56-27N: 02-17E Chemical Transaqua HT2 2120 kg Clyde Suspected hydraulic leak from subsea valve.

02/06/2010 58-21N: 00-52E Oil Condensate 0.002696 tonnes Donan FPSO Emanating from the cargo tank vent.

12/10/2010 57-15N: 00-48E Oil Other 0.497 tonnes Guillemot,Teal,Anasuria Minor bladder leak.

18/11/2010 57-54N: 00-36E Chemical Transaqua 5410 kg Ettrick FPSO Leakage from connections between subsea lines.

07/12/2010 57-58N: 01-51E Chemical Transaqua HT2 8400 kg Seymour WHPS Losses observed from hydraulic panel feeding REV.

26/12/2010 58-22N: 00-04E Chemical Pelagic 100 125818 kg Highlander Template Template shuttle valve seal failure.

** The rollover ongoing incidents above commenced and were initially recorded during a previous reporting year. As a result they have not been recorded as a new incident within the current year’s number of

incidents. However, the quantity of fluid released over the current period has been taken into account within the overall statistical analyses to provide a true reflection of fluids released to sea.

12: UKCS VESSEL DISCHARGES


UKCS/574 03/01/11 57-43N: 00-50E Oil Crude 20 litres Unidentified Vessel Reported by Forties Installation.

UKCS/1241 24/02/11 57-22N: 01-22E Oil Nk 7.5 litres MSV SBS Tempest Reported by Arbroath Installation.

UKCS/603 10/05/11 61-23N: 01-44E Oil Nk 470 litres Unidentified Vessel Reported by Murchison Installation

UKCS/578 18/05/11 57-31N: 00-35E Oil Nk 42.5 litres Unidentified Vessel Reported by Kittiwake Installation.

UKCS/581 30/05/11 59-32N: 01-32E Oil Nk 100 litres Unidentified Vessel Reported by Beryl Alpha Installation.

UKCS/625 03/06/11 56-43N: 02-13E Oil Hydraulic 29 litres MV SSCV Saipem 7000 Oil dispersed naturally.

UKCS/583 10/06/11 58-49N: 01-23E Oil Nk 39 litres Unidentified Vessel Reported by East Brae Installation.

UKCS/484 12/06/11 56-44N: 01-17E Oil Fuel 200 litres MSV Vos Challenger Spill from purifier vent.

UKCS/584 09/07/11 59-33N: 01-24E Oil Nk 2.5 litres Unidentified Vessel Reported by Nevis Installation.

UKCS/585 13/07/11 61-21N: 01-34E Oil Weathered 100 litres Unidentified Vessel Reported by Thistle Alpha Installation.

UKCS/587 19/07/11 61-29N: 01-28E Oil Nk 19 litres Unidentified Vessel Reported by Northern Producer Installation.

UKCS/588 21/07/11 61-21N: 01-34E Oil Crude 6.9 litres Unidentified Vessel Reported by Thistle Alpha Installation.

UKCS/589 08/08/11 57-27N: 01-23E Oil Nk 214 litres Unidentified Vessel Reported by Montrose Installation.

UKCS/591 15/08/11 61-29N: 01-27E Oil Nk 240 litres Unidentified Vessel Reported by Northern Producer Installation.

UKCS/623 17/08/11 61-12N: 01-44E Oil Nk 4 tonnes Unidentified Vessel Reported by Brent Delta Installation.

UKCS/592 23/08/11 57-42N: 01-01E Oil Nk 270 litres Unidentified Vessel Reported by Forties Installation.

UKCS/593 25/08/11 58-13N: 01-06E Oil Weathered 10 tonnes Unidentified Vessel Reported by Balmoral Installation.

UKCS/594 16/09/11 57-27N: 01-23E Oil Nk 72 litres Unidentified Vessel Reported by Montrose Installation.

UKCS/573 18/09/11 56-47N: 02-07E Oil Hydraulic 4 litres MV Fairfield New Venture Line burst, oil dispersed naturally.

UKCS/597 15/11/11 57-38N: 00-09E Oil Nk 10 litres Unidentified Vessel Reported by WilPhoenix MODU.

UKCS/598 21/11/11 61-29N: 01-37E Oil Nk 0.001 litres Unidentified Vessel Reported by Brent Charlie Installation.

UKCS/624 21/11/11 61-29N: 01-35E Oil Nk 25 tonnes Unidentified Vessel Reported by Byford Dolphin MODU.

UKCS/601 24/11/11 57-37N: 01-49E Oil Nk 0.006 litres Unidentified Vessel Reported by Ocean Nomad MODU.

UKCS/602 16/12/11 57-35N: 01-38E Oil Nk 1 tonne Unidentified Vessel Reported by Ensco 100 MODU.

APPENDIX 2

SURVEY QUESTIONNAIRE AND ACCOMPANYING

GUIDELINES

MCA/ACOPS ANNUAL SURVEY OF VESSEL/OFFSHORE

SOURCED MARINE POLLUTION

GUIDELINES TO AID COMPLETION OF THE SURVEY FORM

The survey questionnaire requests information on incidents involving a range of

pollutants including mineral oil (MARPOL I), noxious liquid substances (MARPOL

II), packaged dangerous/harmful goods (MARPOL III) and garbage (MARPOL V).

Reports are requested for pollution incidents attributed to discharges, or suspected

discharges, from vessels and offshore installations operating within the UK Pollution

Control Zone, harbour waters and national waters. Information is not required for

pollution incidents attributed to land-based sources such as industrial premises,

sewers and outfalls.

Annual returns can be made either by email or by post. If using email please click on

the boxes provided and insert other information in the spaces provided. The email and

postal versions of the survey form can be downloaded from the ACOPS website at

www.acops.org.uk (under ACOPS Reports on the main menu) together with previous

survey reports.

Please complete a separate form for each incident. Thank you for your continued

support in providing this important information.

Question Guideline

1 Please insert name of reporting organisation. If you have nothing to report

please tick the no pollution to report box, add respondent details (Question

17) and return the questionnaire to the address shown.

2 Identify the category of vessel/offshore sourced pollution from the options

given (tick appropriate box). Note that in the case of garbage, an incident

report is requested only in circumstances involving an illegal or accidental

discharge from a specific vessel/offshore installation. An incident report is

not required following observations of litter at sea or on beaches from an

unknown source.

3 Insert dates of the beginning and end of the incident.

4 Please identify one or more zones affected by the pollution (tick

appropriate box). The shoreward boundary of the open sea zone is defined

as 3 nautical miles (5.6 km) from nearest land.

5 State how long the pollution remained in days or weeks (insert values).

6 Identify the location of the incident using geo-coordinates, national grid

reference, place name or other suitable method (insert details).

7 If known, insert the estimated volume of pollution in litres, tonnes or cubic

metres. Please state any other units of volume used.

8 Please indicate the overall distance in km, or state the names of settlements

at the extremities, of the affected stretch of coastline.

9 Indicate whether a vessel or offshore installation was identified as a source

of pollution or simply suspected on the basis of available evidence (tick

most appropriate box from the options given). Note that incidents

attributed to land-based sources of pollution are not included in this

survey.

10 Please identify the most appropriate category which indicates the scale of

pollution at sea or deposited on the shoreline (tick appropriate boxes).

11 If known, identify the type of vessel or offshore installation causing the

pollution (tick one of the boxes to select the appropriate response to the

options given).

12 Please state the name of the vessel/offshore installation, whether UK or

foreign registered and operating company if known (insert details in the

spaces provided).

13 Identify the category and type of pollution from the options given (tick the

appropriate box or insert relevant details in the spaces provided).

14 Indicate whether a partial or complete clean-up operation was undertaken

(Circle appropriate option).

15 Please add details of any legal proceedings initiated against alleged

offenders including fines and penalties (identify options as indicated and

insert other information). Any further information not available at the time

of reporting will be requested in a separate questionnaire.

16 Add any further relevant details as indicated (by inserting information in

the space provided or on a separate sheet). Please include any comments

on how the questionnaire might be improved.

17 Please provide the background details requested including your email

address which can be used in future surveys.

Trevor Dixon,

Advisory Committee on Protection of the Sea,

c/o MCSC,

Trinity College (Julian Hunt)

Cambridge CB2 1TQ

Tel: (01494) 521923 email: [email protected]

acops€¦ · different formats. in section 2 descriptive statistics are provided for reported...

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