ACOPS

ADVISORY COMMITTEE ON PROTECTION OF THE SEA

ANNUAL SURVEY OF REPORTED DISCHARGES AND RELEASES ATTRIBUTED TO VESSELS AND OFFSHORE OIL AND GAS INSTALLATIONS OPERATING IN THE ’S EXCLUSIVE ECONOMIC ZONE (UK EEZ) 2016

A survey conducted on behalf of the Maritime and Coastguard Agency

Cambridge, March 2017

This report has been produced by the Advisory Committee on Protection of the Sea under a contract with the Department for Transport. Any views expressed in this report are not necessarily those of the Department for Transport.

© Queen's Printer and Controller of HMSO - 2015

All enquiries relating to the copyright in the work should be addressed to HMSO, The Licensing Division, St Clements House, 2-16 Colegate, Norwich, NR3 1BQ.

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: 28

1 North-east 29 2 Eastern England 30 3 Essex & 31 4 Southern England 32 5 South-west England. 34 6 Bristol Channel & South Wales 35 7 36 8 Western 38 9 & Islands 40 10 Eastern Scotland 40 11 UKCS (Oil and gas installations and vessels) 42

SECTION 5 Quality assurance plan and acknowledgements 45

APPENDIX 1 Summary of reported incidents

APPENDIX 2 Survey questionnaire and accompanying guidelines

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Advisory Committee on Protection of the Sea, 50 Broadway SW1H 0BL

April 2019

LIST OF FIGURES

FIGURE 1 Annual totals for reported discharges attributed to vessels and offshore oil and gas installations 2000-2016

FIGURE 2 Boundaries of UK Exclusive Economic 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 2015 and 2016

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 2016

TABLE 7 Total number of incident reports received from each reporting organisation

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 and releases attributed to vessels and offshore oil and gas installations operating in the United Kingdom’s Exclusive Economic Zone (UKEEZ). 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 1,850 incident reports and supporting information, 745 accidental discharges from vessels and releases from offshore oil and gas installations were identified in the survey area during 2016. An overall increase of 11% was evident in the total number of incidents reported from all sources over the previous year’s total.

A total of 174 vessel-sourced discharges were reported during 2016 which was 35 more than the previous year’s total but significantly fewer than the mean annual total of 184 reported discharges between 2000 and 2015.

A total of 571 accidental releases were reported by offshore oil and gas installations operating in the open sea during 2016 representing a 7% increase on the previous year’s total.

Further analysis of these statistics showed that the total of 341 oil releases from offshore oil and gas installations operating in the open sea during 2016 was 52 more than the mean annual total of 289 releases reported between 2000 and 2015.

The total of 230 non-mineral oil releases by offshore installations during 2016, primarily those involving chemical substances, was 40 more than the total recorded during the previous year.

The reported incidents from all sources during 2016 comprised 67.1% mineral oils, 31% chemicals (including oil-based mud) and 1.9% other substances (including vegetable and animal oils).

Approximately 82% of all accidental discharges and releases were reported in the open sea, 14% were in and harbours and 4% were across the remaining marine environmental zones. Survey respondents submitted details of a total of 102 incidents involving accidental discharges from vessels and oil rigs operating in ports and harbours during 2016 which was 2 more compared with the mean annual total of 100 discharges between 2000 and 2015.

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Eleven beach pollution incidents were reported during 2016 which was 4 more than the mean annual total of 7 incidents reported between 2000 and 2015. Four reports were received of extensive beach pollution by an oil-based substance during 2016. Lumps of a white crystalline type of a petroleum-based wax residue were washed ashore between Milford-on-Sea and Sandwich Bay on 4 separate occasions during 2016. Three reporting organisations referred to a beach pollution incident after weathered crude oil residues were washed ashore in parts of northern Scotland during the last week of April.

The volumes of accidental discharges and releases were recorded in 697 incident reports (including ongoing releases), or 91% of the total. The modal class for oil discharges and releases was less than 455 litres but larger estimated volumes of between 456 litres and approximately 53 tonnes were recorded in 6 of the 11 survey enumeration areas. In total, 3.8% of all oil discharges and releases (including ongoing releases) were greater than 455 litres, when this information was recorded, compared with 4% during the previous year.

The largest oil spill of 53 tonnes of diesel occurred on 8 August after the rig Transocean Winner (17,580 gt, built 1983) detached from its tug during severe weather and subsequently ran aground onto rocks near Dalmore Bay on the .

The modal class for chemical incidents was also less than 455 litres but 48 releases, or 20% of the total (including ongoing releases), were of 1 tonne or more. The largest chemical incident involved an ongoing release of 213,088.80 kg of Oceanic HW 540 v32 and Oceanic HW 540 E from the Strathspey Manifold installation, which commenced on 20 August 2015.

At least 37 confirmed discharges were attributed to vessel casualties including 15 fishing vessels, 14 pleasure craft and workboats, 2 tankers, a barge, a creel boat, a pilot boat, a Ro-Ro ferry, a rig and an ex-warship.

Reporting organisations submitted no details of any successful prosecutions brought by the Crown Office and Procurator Fiscal Service in Scotland for marine pollution offences.

Observations from air surveillance patrols and satellite surveillance programmes were again employed by the competent authorities.

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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 and releases attributed to vessels and offshore oil and gas installations operating in the United Kingdom Exclusive Economic Zone (UKEEZ). 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 spilled, 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 unpermitted oil and chemical releases from offshore oil and gas installations. The survey area included the UKEEZ and adjacent areas of jurisdiction including ports, harbours and tidal stretches of rivers and estuaries. The boundaries of the UKEEZ 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, and harbour authorities, national environment agencies and animal welfare groups. In addition, questionnaire responses were supplemented with Petroleum Operation Notices (PON 1s) provided by the Department of Energy and Climate Change’s (DECC) Offshore Environment Unit (Offshore Petroleum Regulator for Environment and Decommissioning, Department for Business, Energy and Industrial Strategy from 14 July 2016) and Pollution Reports (POLREPS) provided by the MCA. PON 1s are submitted to DECC by offshore oil and gas Page 3 of 45

installations operators for all unpermitted oil or chemical releases to sea regardless of the volume lost. The resulting information was entered into a database identifying separate pollution incidents by date, location and other survey attributes.

1.2.3 Following analysis of data the survey results were presented in a range of different formats. In Section 2 descriptive statistics are provided for reported discharges and releases 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 and releases 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.

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SECTION 2: DESCRIPTIVE STATISTICS AND TREND ASSESSMENTS

2.1 NUMERICAL TRENDS IN REPORTED DISCHARGES

2.1.1 Following analysis of 1,850 incident reports and supporting information, 745 separate discharges from vessels and releases from offshore oil and gas installations were identified within the survey area during 2016. An overall increase of 11% 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 2016 are displayed in Figure 1, including separate line graphs for vessels and offshore oil and gas installations.

2.1.3 A total of 174 vessel-sourced discharges were reported during 2016 which was 35 more than the previous year’s total but below the mean annual total of 183 reported discharges between 2000 and 2015.

2.1.4 A total of 571 accidental releases were reported by offshore oil and gas installations operating in the open sea during 2016 representing a 7% increase on the previous year’s total.

2.1.5 Further analysis of these statistics showed that the total of 341 oil releases from offshore oil and gas installations operating in the open sea during 2016 was 52 more than the mean annual total of 289 releases reported between 2000 and 2015.

2.1.6 The total of 230 non-mineral oil releases by offshore installations during 2016, primarily those involving chemical substances, was 40 more than the total recorded during the previous year. 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 and releases reported during 2015 and 2016 for each of 11 enumeration areas. Geographical boundaries of each enumeration area and the complete survey area are shown in Figure 2. The statistics for discharges and releases in the United Kingdom Exclusive Economic Zone (UKEEZ) have been presented in two source categories: offshore oil and gas installations; and vessels.

2.2.2 The discharges and releases from all sources reported during 2016 comprised 67.1% mineral oils, 31% chemicals (including oil-based mud) and 1.9% other substances (including vegetable and animal oils).

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TABLE 1: TOTAL INCIDENTS REPORTED BY CATEGORY OF POLLUTION AND ENUMERATION AREA FOR 2015 AND 2016 (a).

Enumeration Mineral Garbage Vegetable & Chemicals Other Totals Area oils animal oils substances 1. North-east England 12 (9) - (-) - (-) - (1) - (-) 12 (10) 2. Eastern England 4 (6) - (-) 1 4 (-) - (-) 9 (6) 3. Essex & Kent 18 (4) - (-) 2 (1) - (-) 1 (-) 21 (5) 4. Southern England 19 (13) - (-) - (2) - (-) - (1) 19 (16) 5. South-west England 9 (17) - (-) 2 (1) - (-) - (-) 11 (18) 6. Bristol Channel & South Wales 4 (8) - (-) 1 (-) - (-) - (-) 5 (8) 7. Irish Sea 22 (14) - (-) 2 (-) - (-) - (-) 24 (14) 8. Western Scotland 25 (20) - (-) - (-) - (-) - (-) 25 (20) 9. Orkney & Shetland Islands 7 (9) - (-) - (-) - (-) 1 (-) 8 (9) 10. Eastern Scotland 23 (11) - (-) - (-) - (-) - (1) 23 (12) 11. UKCS oil & gas installations 341 (337) - (-) 3 (1) 227 (193) - (-) 571 (531) 11. UKCS vessels 16 (22) - (-) - (-) - (-) 1 (-) 17 (22) Totals 500 (470) - (-) 11 (5) 231 (194) 3 (2) 745 (671)

(a) The figures in parenthesis are the corresponding values from the 2015 survey.

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2.3 LOCATIONS OF REPORTED DISCHARGES

2.3.1 The geographical location of each reported discharge or release 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 2016 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 mineral oil discharges in the survey area during 2016 showed more frequent reports of incidents across 6 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 and releases 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 82% of all discharges and releases were reported in the open sea, 14% in ports or harbours and 4% across the remaining zones.

2.3.4 Reporting organisations submitted details of 102 incidents involving discharges of polluting substances from vessels and oil rigs located in ports or harbours during 2016, which was 2 more than the mean annual total of 100 discharges between 2000 and 2015. The largest port incident occurred at the Port of ’s South East Canada No 1 dock on 23 August following a 3-tonne palm oil spill from the Stenaweco C. Corrrado (29,846 gt. built 2015) (Refer 4.7.2).

2.3.5 Eleven beach pollution incidents were reported during 2016 which was 4 more than the mean annual total of 7 incidents reported between 2000 and 2015. Four reports were received of extensive beach pollution by an oil- based substance during 2016. Lumps of a white crystalline type of petroleum-based wax residues were washed ashore between Milford-on-Sea and Sandwich Bay on 4 separate occasions during 2016 (Refer 4.3.5 and 4.4.7). Three reporting organisations referred to a beach pollution incident after weathered crude oil residues were washed ashore in parts of northern Scotland during the last week of April (Refer 4.10.7).

2.3.6 Lumps of palm oil were washed ashore along an 11 km stretch of the North Cornwall coastline between Constantine Bay and Trevose Bay during the first week of January 2016.

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TABLE 2: TOTAL INCIDENTS REPORTED AND DISTRIBUTION BY MARINE ENVIRONMENTAL ZONE AND ENUMERATION AREA (a).

Enumeration area Open sea Tidal river/ Bay/nearshore Beach/shore Port/harbour Totals estuary waters 1. North-east England 6 - - - 6 12 2. Eastern England 5 (3) - 2 (2) - 2 9 (5) 3. Essex & Kent 1 - 2 (1) 6 (1) 12 (1) 21 (3) 4. Southern England 2 1 1 2 13 19 5. South-west England 1 - 1 1 (1) 8 (1) 11 (2) 6. Bristol Channel & South Wales - - 1 1 (1) 3 5 (1) 7. Irish Sea 3 - 4 - 17 (2) 24 (2) 8. Western Scotland 1 - 5 - 19 25 9. Orkney & Shetland Islands 5 (1) - - - 3 8 (1) 10. Eastern Scotland 2 - 1 1 19 23 11. UKCS oil & gas installations 571 (230) (b) (b) (b) (b) 571 (230) 11. UKCS vessels 17 (1) (b) (b) (b) (b) 17 (1) Totals 614 (235) 1 17 (3) 11 (3) 102 (4) 745 (245)

(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.

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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 UKEEZ 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 and releases were not confirmed in written reports for 65 incidents, or 9% of the total reported (including ongoing releases).

2.4.2 Excluding releases from offshore oil and gas installations and vessels operating in the UKEEZ area 11, less than 1% 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 UKEEZ enumeration area 11 a release area of water surface pollution by oil greater than 1.6 km2 was reported on a single occasion and attributed to an unidentified passing vessel (Refer 4.11.10).

2.4.3 The modal class for all oil incidents was less than 455 litres but larger estimated maximum volumes of between 456 litres and 53 tonnes were recorded in 5 of the 11 survey enumeration areas. In total, 3.8% of all oil discharges and releases (including 4 ongoing releases) were greater than 455 litres where this information was recorded, compared with 4% during the previous year (Refer to Table 3 and Appendix 1 Table 11).

2.4.4 The largest oil spill with an estimated maximum volume of 53 tonnes, occurred after the rig Transocean Winner (17,580 gt, built 1983) ran aground on 8 August near Dalmore Bay on the Isle of Lewis. The rig had been under tow by the tug Alps Forward in gale force winds when the tow line broke. Two of the rigs 4 fuel tanks were damaged resulting in 53 tonnes of diesel entering the water which later dispersed or evaporated in rough conditions. (Refer 3.1 WS/487).

2.4.5 The modal class for chemical incidents was also less than 455 litres but 48 releases, or 20% of the total (including 13 ongoing releases), were of 1 tonne or more. The largest chemical incident involved an ongoing release of 213,088.80 kg of Oceanic HW 540 v32 and Oceanic HW 540 E from the Strathspey Manifold installation, which commenced on 20 August 2015.

2.4.6 In Section 3 details are provided for all reports involving releases or discharges of 2 tonnes or more during 2016.

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

Enumeration area Extent of pollution (b) Estimated volumes of discharges and releases Water surface Shoreline 1-455 456 litres – 1-50 tonnes >50 Not litres 999 litres tonnes known <1.6 km >1.6 km < 1.6 > 1.6 km km 1. North-east England 12 - - - 8 1 - - 3 2. Eastern England 9 (5) - - - 4 (3) - - - 5 (2) 3. Essex & Kent 15 (2) - 4 (1) 2 9 (2) - - - 12 (1) 4. Southern England 17 - 2 10 - - - 9 5. South-west England 10 (1) 1(1) 5 (1) - 1 - 5 (1) 6. Bristol Channel & South Wales 4 - 1 (1) - 2 - - - 3 (1) 7. Irish Sea 24 (2) - - - 15 1 2 (2) - 6 8. Western Scotland 23 2 - - 13 - - 1 11 9. Orkney & Shetland Islands 8 (1) - - - 4 - - - 4 (1) 10. Eastern Scotland 22 - - 1 15 1 - - 7 (c) (d) (d) 11.UKCS oil & gas installations(f) 571 (230) - (e) 511 (175) 26 (20) 50 (47) 1 (1) - 11. UKCS vessels (c) 16 (1) (c) 1 (d) (d) 14 (1) 2 1 - - Totals 731 (242) 3 5 (2) 6 (1) 610 (182) 31 (20) 54 (49) 2 (1) 65 (6)

(a) The figures in parenthesis are included in the totals and refer to incidents involving discharges or releases of substances other than mineral oil. (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 2016 volumes of releases from 17 ongoing incidents that commenced during 2008, 2010, 2011, 2013, 2014 and 2015. (f) The figures include all 2016 incidents which have been identified as known third party releases. Refer DECC Environmental Alert 003/2015 for further details (https://www.gov.uk/guidance/oil-and-gas-environmental-alerts-and-incident-reporting).

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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 67% of incident reports. Crude oils accounted for 11% of the identified types of mineral oil discharges. The largest crude oil incident, with an estimated maximum volume of 0.703 tonnes, was reported by the Clyde platform on 26 January. The incident was caused by a pinhole leak in pipework (Refer 11- UKCS 1225).

2.5.2 Bunker, diesel, fuel and gas oil incidents were attributed to vessels and oil and gas installations on 177 occasions, 40 more than the previous year’s total, across all enumeration areas. The discharges and releases were reported most frequently in the UKCS, western Scotland and Irish Sea enumeration areas.

2.5.3 Lubrication and hydraulic mineral oil incidents were recorded in 9 of the 11 survey enumeration areas with 151 releases attributed to offshore oil and gas installations. Of these, at least 50 hydraulic releases in quantities of up to 50 litres were identified by DECC (BEIS from 14 July) as Known Third Party reports and attributed to remote-operated vehicles (ROVS) and vessels.

2.5.4 Respondents described the remaining types of mineral oil discharges or releases as bilge oils, oily scum, oily water, sludge and various waste oils.

2.5.5 A total of 245 reports referred to incidents involving substances other than mineral oils during 2016 compared with 202 reports during 2015. Offshore operators reported 227 unpermitted chemical releases and 3 vegetable oil releases during 2016 compared with 193 chemical releases and a single vegetable oil release during the previous year. The identified substances were associated with exploration and production operations and included, calcium chloride, caustic soda, citric acid, glycol, methanol, mono-ethylene glycol, potassium chloride, sodium hypochlorite and tri-ethylene glycol. The estimated volumes of unpermitted chemical releases ranged from less than 0.0003 kg to 213,088.80 kg and 48 releases (including ongoing releases) were 1 tonne or more. Further details are provided in Section 3 and Appendix 1.

2.5.6 Various chemicals need 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. Of the total chemicals spilled in 2016 approximately 85% were considered under the Commission for the Protection of the Marine Environment of the North East Atlantic (OSPAR) list of substances used and discharged offshore as Posing Little or No Risk to the Environment (PLONOR). None of the chemicals spilled were included as a substance listed in the OSPAR list of chemicals for priority action. None of the spill incidents gave risk to a significant environmental impact.

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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 7 5 1 7 2 - 2 ------2. Eastern England 8 (5) 1 1 2 - - 1 - - - 1 - 4 - - 3. Essex & Kent 14 (1) 7 (2) - 10 1 1 6 - - - 2 - - - 1 4. Southern England 17 2 - 13 2 2 2 ------5. South-west England 10 (1) 1 (1) - 8 1 - - - - - 2 - - - - 6.Bristol Channel & South Wales 4 1 (1) - 2 1 1 - - - - 1 - - - - 7. Irish Sea 22 (2) 2 - 15 6 - 1 - - - 2 - - - - 8. Western Scotland 23 2 - 16 4 3 2 ------9. Orkney & Shetland Islands 6 2 (1) - 6 - - 1 ------1 - 10. Eastern Scotland 21 2 - 11 8 2 2 ------11. UKCS oil & gas installations(c) 571 (230) - 49 86 151 44 11 - - - 3 6 221 - - 11. UKCS vessels - 17 (1) 1 1 - - 14 ------1 Totals 703 42 52 177 176 53 42 - - - 11 6 225 1 2 Percentage of total reports 94.4 5.6 7.0 23.8 23.6 7.1 5.6 - - - 1.5 0.8 30.2 0.1 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. (c) The figures include all 2016 incidents including those which have been identified as known third party releases (Refer to the DECC Environmental

Alert 003/2015 for further details).

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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 releases from oil and gas installations operating on the UKEEZ accounted for 81% compared with 83.9% of all identified reports of pollution during the previous year. Corresponding statistics for fishing vessels, pleasure craft, general cargo vessels and the remaining types of vessels were 4.8%, 4.3%, 0.6% and 9.2% respectively.

2.6.3 Reporting organisations identified discharges from tankers on 6 occasions during 2016 which was 2 fewer than the number of incidents reported during the previous year. The crude oil tanker Ridgebury Alice M (56,172 gt, built 2003) reported a 10-litre crude oil spill in the Humber Estuary. The LPG tanker Happy Bird (6,051 gt, built 1999) reported the loss to sea of approximately 600 litres of lubrication oil. The oil came from drums stored on deck which broke loose and were ruptured in heavy weather.

2.6.4 A European Maritime Safety Agency (EMSA) report referred to a discharge of tank washings from the oil/chemical tanker Overseas Alcmar (30,018 gt, built 2004) in the open sea off Lowestoft on 17 March. The crude oil shuttle tanker (47,724 gt, built 1996) reported a slight leak of hydraulic oil from a thruster in the open sea off Troup Head on 14 April.

2.6.5 Respondents also submitted details of 6 discharges from warships operating in the open sea and in ports and harbours. A POLREP referred to a diesel oil spill from the Albion-class assault ship HMS Albion operating off Sunderland and the oil was later broken-up by propeller agitation. Three incidents involving warships were reported by QHM during 2016. Human error by a contractor was identified as the cause of a 50-litre diesel spill from the Daring-class air defence destroyer HMS Dragon on 7 March. A small boat boom and propeller agitation by a tug were employed in a clean-up following a 30-litre AVCAT spill from a warship berthed at the Fountain Lake Jetty on 6 June.

2.6.6 A detached fuel hose to a seaboat was identified as the cause of a 150-litre diesel spill from the multi-role hydrographic survey ship HMS Echo. The ton-class minesweeper HMS Bronington (launched 1953), belonging to the Warship Preservation Trust, partially sank on her moorings at Docks on 18 March. A boom was placed around the vessel to contain the 2- litre fuel oil spill and the vessel was later scrapped.

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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 - - - - 3 2. Eastern England - - 3 (3) 2 (1) - - 2 - 1 (1) 3. Essex & Kent - 2 - - 1 - 4 - 7 (1) 4. Southern England - 3 - - - - 8 - 6 5. South-west England - 3 (1) - - - - 3 1 3 6. Bristol Channel & South Wales - 1 - - - - 2 - 1 7. Irish Sea - 4 - 1 (1) 2 (1) - 5 - 10 8. Western Scotland - 14 - - 1 2 3 - 3 9. Orkney & Shetland Islands - 2 1 - - 1 - 1 1 10. Eastern Scotland - 4 6 1 - - 3 - 7 11. UKCS oil & gas installations b) - - - - - 571 (230) - - - 11. UKCS vessels ------Totals - 34 (1) 11 (3) 6 (2) 4 (1) 574 (230) 30 2 42 (2)

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.

(b) The figures include all 2016 incidents identified as known third party releases (Refer to DECC Environmental Alert 003/2015 for further details at https://www.gov.uk/guidance/oil-and-gas-environmental alerts and increased reporting).

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2.6.7 At least 37 confirmed discharges were attributed to vessel casualties including 15 fishing vessels, 14 pleasure craft and workboats, 2 tankers, a barge, a creel boat, a pilot boat, a ro-ro ferry, a rig and an ex-warship. Vessel casualties accounted for 43% of all discharges attributed to fishing vessels and likewise 33% of all discharges attributed to pleasure craft and workboats. The corresponding statistics from the 2015 survey were 37% and 29% respectively. Further details identifying the likely causes of vessel casualties, where known, are provided in Section 4 and Appendix 1.

2.6.8 Twenty-four vessel casualty spills were reported in England and Wales during 2016. On March 10 the 22-metre demersal stern trawler MFV Saint Christophie 1 (145 gt, built 1984) listed over and sank on the seabed at Dartmouth Harbour. Absorbent pads and disc skimmers recovered approximately 2 tonnes of diesel oil. The LPG tanker Happy Bird (6,051 gt, built 1999) reported the loss to sea of approximately 600 litres of lubrication oil from drums stored on deck which broke loose and were ruptured in heavy weather. On 18 March the crude oil tanker Suvorovsky Prospect (65,504 gt, built 2011) reported a 250-litre crude oil spill during a ship-to-ship transfer operation in international waters off Southwold on 18 January. The 10-metre pilot boat Challenger sank on her mooring on 23 February in Portstewart Harbour during a storm causing a 600-litre diesel oil spill. A tier 2 counter- pollution operation was successfully completed and the vessel was later craned ashore.

2.6.9 At least 13 vessel-casualties were reported in Scotland during 2016. POLREPS and a Cromarty Firth Port Authority report described an incident after the Caledonian Towage workboats Buster and Teal sank alongside a berthing barge in the West Harbour at Invergordon on 11 December. A maximum of 500 litres of marine gas oil leaked from the 2 sunken vessels into the harbour. On 4 September the Caledonian MacBrayne Ro-Ro-ferry Hebrides (5,506 gt, built 2001) suffered an engine malfunction while berthing at Lochmaddy. Approximately 200 litres of stern tube oil leaked into the harbour and later dispersed naturally.

2.6.10 In the early hours of 8 August the semi-submersible drilling rig Transocean Winner (17,580 g, built 1983) ran aground near Dalmore Bay on the Isle of Lewis. The rig had earlier been under tow by the tug Alp Forward in gale force winds when the tow line broke. The rig subsequently drifted ashore and became stuck fast on rocks. Two of the rig’s 4 fuel tanks were damaged resulting in 53 tonnes of diesel oil entering the water which later dispersed or evaporated in rough conditions.

2.7 PROSECUTIONS

2.7.1 No reports were received of any successful prosecutions brought by the Crown Office and Procurator Fiscal Service in Scotland for marine pollution offences.

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TABLE 6: DETAILS OF PROSECUTIONS BROUGHT BY THE COMPETENT AUTHORITIES IN THE UNITED KINGDOM DURING 2016(a)

Date and location of incident Name of vessel or offshore installation Prosecution brought by Fine and type of pollution

No reports were received of any fines imposed by the competent authorities for marine pollution offences during 2016.

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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, Pollution Prevention and Control Act 1999, Offshore Chemicals Regulations 2002, Offshore Petroleum Activities (Oil Pollution Prevention and Control) Regulations 2005.

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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 1,850 from which 745 separate incidents were subsequently identified and entered into the 2016 database.

2.8.2 Observations from air surveillance patrols and a satellite surveillance programme were again employed to help identify discharges from vessels and releases from offshore oil and gas installations operating in the UKEEZ (Refer Section 4).

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

Reporting organisations Total number of reports received English and Welsh Local Authorities 136 Environment Agency for England 35 English Inshore Fisheries and Conservation Authorities 12 Natural Resources Wales 10 Northern Ireland Environment Agency 2 United Kingdom Ports 126 Maritime and Coastguard Agency 783 DECC Offshore Environment Unit (BEIS from July 2016) 594 Scottish Environment Protection Agency 37 Scottish Local Authorities 24 Scottish Society for the Prevention of Cruelty to Animals 91 Grand Total 1,850

(a) The figure provided includes duplicate PON 1 reports provided by DECC (BEIS) which form part of the quality assurance process (Refer to Section 5).

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SECTION 3: SUMMARY OF LARGER INCIDENTS (TWO TONNES OR MORE) DURING 2016

(Refer to Section 4 and Appendix 2 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 the volume of the discharge or release.

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 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 BEIS. Where necessary, meetings with the operator took place to discuss aspects associated with the incident, environmental impact and the operator’s short- and long-term plans to stop the release and, where relevant, effect a final repair.

3.1 Western Scotland 8 August: Rig Transocean Winner (8-WS/487) The semi-submersible drilling rig Transocean Winner (17,580 gt, built 1983) detached from its tug during towing in severe weather and subsequently ran aground onto rocks near Dalmore Bay on the Isle of Lewis. Two of the rigs 4 fuel tanks were damaged resulting in 53 tonnes of diesel oil entering the water which later dispersed naturally in rough conditions. The rig was refloated and towed from Dalmore Bay to Broad Bay on the east coast of the Isle of Lewis where it was loaded onto a semi- submersible heavy lift ship for passage to Malta.

3.2 UKCS 20 April: Rowan Drilling (UK) Limited Rowan Gorilla V (11- UKCS/1340) Rowan Drilling (UK) Limited reported an incident resulting in a combined release of 40,541 kg of Welllife Cement Blend; SILICALITE LIQUID; HALAD-300L NS; CFR-8L; SA-533; HR-601M; HR-25L; NF-6; Barite 4,1 D31; EZ MUL NT; Baracarb (all grades); Bentone-38; Calcium Chloride Brine; CMO 568; DRILTREAT; DURATONE E; GELTONE II; INVERMUL NT; Lime; ADAPTA; SUSPENTONE; EDC 99-DW and STEELSEAL due to a blocked line causing an overflow in the Fluid Return System from the Rowan Gorilla V mobile drilling unit, which was operating on the West Franklin field at the time.

3.3 UKCS 1 April: BP Exploration Operating Company Limited Foinaven DC2 Manifold (11-UKCS/1314) BP Exploration Operating Company Limited reported an incident resulting in a release of 28,916.8 kg of Oceanic HW540 v from a Subsea Upper Master Valve on

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the Foinaven DC2 manifold. It is expected that the repair will be affected in October 2017, PON1 closed.

3.4 UKCS 4 November: ConocoPhillips (UK) Limited Viking BP Platform (11- UKCS/1648) ConocoPhillips (UK) Limited reported an incident resulting in a combined release of 23,734.41 kg of methanol (all grades); KI-5351; WG-11; Bactgron B1150; FE-2; K- 35 and NF-6 whilst carrying out decommissioning activities on the Viking BP Platform. Investigation 58/16 ended May 2016 subsea pipeline failure during decommissioning.

3.5 UKCS 8 April: BP Exploration Operating Company Limited Cyrus Manifold (11-UKCS/1322) BP Exploration Operating Company Limited reported an incident resulting in the release of 19,800 kg of methanol due to a pipework failure in the Subsea Pipelines on the Cyrus manifold. Investigations identified that pipework damage was likely to have been caused by impact with fishing gear. It was not possible to identify the vessel responsible for entering the restricted area. Changes were made to trawl protection around such structures to minimise the likelihood of a future similar occurrence.

3.6 UKCS 8 February: BP Exploration Operating Company Limited Petrojarl Foinaven FPSO (11-UKCS/1238) BP Exploration Operating Company Limited reported an incident resulting in the release of 16,790 kg of Oceanic HW540 v2 due to SCM failure of Hydraulics on an open system in the Petrojarl Foinaven FPSO. The failed Subsea Control Module was replaced in April 2016 at which time the release ceased.

3.7 UKCS 18 June: BP Exploration Operating Company Limited Petrojarl Foinaven FPSO (11-UKCS/1438) BP Exploration Operating Company Ltd reported an incident resulting in a release of 15,645.6 kg of Oceanic HW540 v2 due to a failure of the fittings/connections in the Hydraulics - Open System on the Petrojarl Foinaven FPSO. The damaged infrastructure was replaced in October 2016 and the release ceased.

3.8 UKCS 29 August: Shell U.K. Limited Haewene Brim (11-UKCS/1548) Shell U.K. Limited reported an incident resulting in a release of 15,560 kg of methanol (all grades) due to a pressure drop where no leak path was identified from the Haewene Brim FPSO. Last reported under version 7 in Sept-2016 with a total loss of 15,560kg of methanol. Cause was a hose splitting & separating from the hose fitting thought to be due to metallurgy issues.

3.9 UKCS 25 April: Total E & P Limited West Phoenix (11-UKCS/1353) Total E & P Limited reported an incident resulting in a combined release of 14,762.46 kg of sodium chloride brine and EDC 99-DW due to the disconnect of Lower Marine Riser Package on the West Phoenix installation.

3.10 UKCS 16 February: Shell UK Limited Gannet A Platform (11-UKCS/1251) Shell UK Limited reported an incident resulting in the cumulative release of 11,252.19 kg of TEG (all grades) and EC1188A due to a release from a joint on the

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Fixed Chemical Pipework (Utility Chemicals) from the Gannet A platform. This was identified as a cooling medium leak from the cooler plate. New plating pack installed and closed out in April 2016.

3.11 UKCS 29 January: Maersk Oil UK Limited Janice A FPU (11-UKCS/1231) Maersk Oil UK Limited reported an incident resulting in a total release of 9,730 kg of Castrol Transaqua HT2 water-based hydraulic control fluid from the Janice FPU installation. The release source was identified as the Affleck subsea manifold with the release rectified upon the depressurisation of the Affleck manifold in preparation for decommissioning.

3.12 UKCS 6 July: Petrofac Facilities Management Limited Anasuria FPSO (UKCS/11464) Petrofac Facilities Management Limited reported an incident resulting in a release of 5,594.335 kg of Oceanic HW525 v2 due to a leakage from the seals in the hydraulic swivel on the Anasuria FPSO. The release of Oceanic HW525 v2 has now ceased.

3.13 UKCS 2 November: Nexen Petroleum UK Limited Golden Eagle Northern Manifold (11-UKCS/1643) Nexen Petroleum U.K. Limited reported an incident resulting in a combined release of 5,121.14 kg of RX-9022 and FX2504 due to subsea chemical systems fittings/ connections failure on the Golden Eagle northern manifold. Failure of a subsea component led to release of scale inhibitor. Full material and compatibility testing performed. New long term protection cap fitted to fix issue.

3.14 UKCS 22 April: Maersk Oil North Sea UK Limited Gryphon A Production Vessel (11-UKCS/1347) Maersk Oil North Sea UK Limited reported an incident resulting in a combined release of 5,050 kg of ethylene glycol, MEG and RX-9103N (corrosion inhibitor). These offshore chemicals were utilised as a heating medium and were released to sea as a result of internal sand erosion in a heat exchanger unit. The unit has since been repaired.

3.15 UKCS 5 September: Nexen Petroleum UK Limited Golden Eagle PUQ Platform (11-UKCS/1558) Nexen Petroleum U.K. Limited reported an incident resulting in a release of 4.8 tonnes of diesel from a systems overflow on the Golden Eagle PUQ platform. Investigated by Department, and notice served. Diesel release to sea from overfill of diesel day tank and failure of drains to work to design specification. Nexen have implemented the required changes to prevent reoccurrence.

3.16 UKCS 22 February: BP Exploration Operating Company Limited Ensco 101 (11-UKCS/1259) BP Exploration Operating Company Limited reported an incident resulting in a combined release of 4,659.3 kg of citric acid; FLO-TROL; FLO-VIS PLUS; MAGNESIUM OXIDE; M-I WATE (All Grades); POLYPAC - All Grades; PTS 200; SAFE-CIDE; soda ash and sodium chloride brine due to pit valves being left open on the Ensco 101 mobile drilling unit which was operating on the Mungo field at the time. An investigation was undertaken by Offshore Environmental Inspectorate. Following that investigation, a number of amendments were made by

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Ensco and BP to work permit and control of work procedures and hardware changes were made to pumping controls.

3.17 UKCS 6 August: Nexen Petroleum U.K. Limited Golden Eagle W Platform (11- UKCS/1506) Nexen Petroleum U.K. Limited reported an incident resulting in a release of 4,460 kg of methanol (all grades) due to Fixed Chemical Pipework (Utility Chemicals) being open to the environment on the Golden Eagle W platform. This was investigated by DECC (BEIS). Methanol was released to the environment as a result of shutdown protocols when the dump valve was opened when fail safe mode was activated. A new thermal activated valve has been installed that will stop this issue.

3.18 UKCS 13 October: Oranje-Nassau Energie UK Limited Sean PP Platform (UKCS/1616) Oranje-Nassau Energie (ONE) UK Limited reported an incident resulting in a release of 3.66 tonnes of lubrication oil due to the storage drain line being left open on the Sean PP Platform Investigated by Department. Release of hydraulic oil to drains from turbine room. No caisson in place resulted in oil being released to sea. ONE to implement a number of improvements to prevent reoccurrence.

3.19 UKCS 15 November: Maersk Drilling UK Limited Maersk Highlander (11- UKCS/1660) Maersk Drilling UK Limited reported an incident resulting in a release of 3,552 kg of Erifon CLS 40 from the BOP (Topsides) - Hydraulic System on the Maersk Highlander mobile drilling unit whilst working on the Culzean field. Maersk Drilling UK Limited reported an incident resulting in a release of 3,552 kg of Erifon CLS 40 water based Blow Out Preventer (BOP) control fluid from the Maersk Highlander mobile drilling unit whilst undertaking well operations on behalf of Maersk Oil North Sea Limited in the Culzean field. The release occurred as a result of a loose connection on a BOP control fluid hose.

3.20 UKCS 25 December: Maersk Oil UK Limited Maersk Highlander (11- UKCS/1711) Maersk Oil UK Limited reported an incident resulting in a release of 3042.3 kg water based drilling mud (comprising soda ash; caustic soda; M-I GEL; M-I WATE; POLYPAC and DUO-VIS) from the Maersk Highlander mobile drilling unit whilst undertaking well operations on behalf of Maersk Oil North Sea Limited in the Culzean field. The release occurred as a result of both passing valves and inaccuracies in valve position information.

3.21 UKCS 26 September: Nexen Petroleum U.K. Limited Scott South Subsea Structure (11-UKCS/1594) Nexen Petroleum U.K. Limited reported an incident resulting in a release of 3,018.64 kg of Oceanic HW540 E from the Scott South subsea structure. Ongoing PON1. Hydraulic fluid releases from Scott subsea infrastructure. Nexen have identified release points and DSV campaign in September/October 2017 is to fix issue.

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3.22 Irish Sea 23 August: MT Stenaweco C. Corrado (7-IS/405) A ruptured cargo hose was identified as the cause of 3 tonne palm oil spill from chemical/oil products tanker Stenaweco C. Corrado (29,846 gt, built 2015) at the ’s South East Canada No 1 dock. A tier 2 counter-pollution operation was successfully completed.

3.23 UKCS 10 September: BP Exploration Operating Company Limited Mungo Production Manifold (11-UKCS/1574) BP Exploration Operating Company Limited reported an incident resulting in a combined release of 2,834.91 kg of EC6199A; EC6804A and sodium hypochlorite solution generated in situ as a result of entrained chemicals in the utility system on the Mungo Production manifold. The faulty valve on the seawater injection system was replaced. Additional training and awareness sessions were undertaken to ensure that all personnel were aware of the potential for seawater injection leaks to contain small concentrations of entrained production chemicals.

3.24 Southern England January to March: Unidentified vessel (4-SE/189) At least 2.5 tonnes of white crystalline paraffin wax residues were removed from the foreshore during clearance operations organised by local authorities at various locations along the coastline of southern England and Kent.

3.25 UKCS 2 August: BP Exploration Operating Company Limited Andrew Platform (11-UKCS/1503) BP Exploration Operating Company Limited reported an incident resulting in a release of 2,457 kg of Castrol Transaqua HT2 due to fittings/connections on the hydraulics - open system on the Andrew platform. Topside and subsea investigations were undertaken to identify the source of this subsea release. Once located a dive support vessel was mobilised to make the necessary repairs to the subsea infrastructure and prevent any further release of the water based hydraulic fluid.

3.26 UKCS 28 April: Total E & P Limited Dunbar Platform (11-UKCS/5134) Total E & P Limited reported an incident resulting in a release of 2,117.88 kg of Oceanic HW443 R due to a solenoid failure in the Hydraulics - Open System on the Dunbar platform. The leak was isolated until a repair could be undertaken.

3.27 UKCS 19 July: Total E & P Limited Dunbar Platform (11-UKCS/1481) Total E & P Limited reported an incident resulting in the release of 2,033 kg of Oceanic HW443 R due to wear and tear on DCV Internals where a valve was compromised on the Dunbar platform. The valve was re-seated by actuating it, thus stopping the release.

3.28 UKCS 1 January: Enquest Heather Limited Don SW & W Don Northern Producer (11-UKCS/4824) Enquest Heather Limited reported an incident resulting in the release of 2,000 kg of Castrol Transaqua HT2 due to SCM failure of Hydraulics on Open System on the Don SW & W Don Northern Producer installation. The SCM was the source of this release, multiple attempts to recycle the valve eventually allowed the release to cease.

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3.29 South-west England 10 March: MFV Saint Christophie 1 (5-SW/278) Approximately 2 tonnes of diesel oil were recovered from the water surface during a salvage operation after the 22-metre polyester-resin-hulled demersal stern trawler Saint Christophie 1 (145gt, built 1984) listed over and sank next to her berth alongside the South Embankment Quay at Dartmouth. The vessel was later declared a constructive total loss by its insurance company.

ONGOING INCIDENTS OCCURRING IN A PREVIOUS CALENDAR YEAR BUT WITH QUANTITIES RELEASED DURING 2016

The following reported UKCS incidents occurred during a previous calendar year, but still continued over a period of time during 2016.

3.30 UKCS 1 January: CNR International (UK) Limited Ninian Central Platform (11-UKCS/1350) CNR International (UK) Limited reported an incident resulting in a release of 39,192.3 kg of Oceanic HW540 v2 between 1 January and 31 December 2016 due to a failure of the SSIV hydraulic system on the Ninian Central platform. On 5 June 2017 a dive support vessel mobilised to Ninian Central to undertake repairs to stop the release. CNR have confirmed that the release has been repaired.

3.31 UKCS 1 January: Shell UK Limited Scoter Subsea Completion (11- UKCS/15175) Shell UK Limited reported an incident resulting in a release of 8,553.2591 kg of methanol (all grades) between 1 January and 16 March 2016 due to a failure of a subsea umbilical on the Scoter subsea completion. The subsea umbilical connection was repaired by Shell in March 2016.

3.32 UKCS 1 January: BG International (CNS) Limited Armada Platform (11- UKCS/1380) BG International (CNS) Limited reported an incident resulting in a release of 6,420 kg of Transaqua HT2N between 1 January and 31 December 2016 due to a failure of the hydraulics - Open System - Fittings / Connections on the Armada platform. Ongoing subsea release of PLONOR fluid. Only occurs when well is open flowing. CoP for well has been agreed with operator as Oct-2018 at which stage well will be closed in, stopping release.

3.33 UKCS/ 1 January: Chevron North Sea Limited Captain WPP’A’ (UKCS/1741) Chevron North Sea Limited reported an incident resulting in a release of 2,755 kg of Oceanic HW540 E between 1 January and 27 May 2016 due to a newly installed subsea control module. Monitoring since 27 May has shown the release to have ceased.

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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)

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4.1 North-east England (Northumberland, Tyne & Wear, Durham, Yorkshire and The Humber)

4.1.1 Twelve vessel-source pollution incidents were identified by reporting organisations during 2016, two more than the previous year’s total. Six discharges occurred in local ports and harbours and the same number were recorded in the open sea. A source of pollution was identified on 7 occasions, the sources including 2 tankers, an offshore supply vessel, a fishing vessel, a warship, a dredger and a workboat. Releases from offshore oil and gas installations operating off north-east England were included in the statistics for the UKCS (Refer to 4.11).

4.1.2 A single incident was reported by (ABP) Humber Estuary Services during 2016. The crude oil tanker Ridgebury Alice M (56,172 gt, built 2003) reported a 10-litre crude oil spill on 20 November. The oil dispersed naturally and no further actions were required.

4.1.3 Elsewhere reporting organisations recorded 5 oil spills in ports and harbours at Scarborough, Teesport, Warkworth and Whitby. The 13-metre trawler Scarlet Lou BS 1 (39.92 gt, built 1988) sank alongside the Scarborough Harbour Fish Quay following an ingress of water on 21 January. Booms were deployed in a clean-up operation and the vessel was later refloated. A POLREP and an Environment Agency (EA) report referred to a 7-litre hydraulic oil discharge from a crane on the multi-purpose offshore vessel Havila Phoenix (10,599 gt, built 2009) at Teesport on 27 September. The oil was later dispersed by wave action.

4.1.4 A small diesel sheen was reported in Warkworth Harbour on 10 July. Two diesel oil discharges were reported in Whitby Harbour during 2016. Three reporting organisations submitted details of an incident after the 10-metre charter angling vessel Stony Broke capsized and sank in suspicious circumstances alongside the Upper Harbour on 5 July. A clean-up operation was completed by harbour staff and a police investigation was underway at the time of reporting. A light rainbow diesel sheen extending for 250 metres was reported near the fish market on 6 October and attributed to an unidentified vessel.

4.1.5 Six incidents were reported in the open sea during 2016. The suction dredger UKD Marlin (2,692 gt, built 1993) reported an accidental overboard discharge of 40 litres of marine gas oil off Easington on 3 June. A POLREP referred to a diesel oil spill from the Albion-class assault ship HMS Albion operating off Sunderland and the oil was later broken-up and dispersed by propeller agitation. The LPG tanker Happy Bird (6,051 gt, built 1999) reported the loss to sea of approximately 600 litres of lubrication oil from drums stored on deck which broke loose and were ruptured in heavy weather. A light diesel sheen extending for 1.6 km was reported off Blyth on 2 December. Offshore oil and gas installations reported 2 oil sheens and both were attributed to unidentified passing vessels.

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4.2 Eastern England (Lincolnshire, Norfolk & Suffolk)

4.2.1 Nine incidents were recorded during 2016, three more than the total recorded during the previous year. Accidental releases from offshore oil and gas installations operating off eastern England were included in the statistics for the UKCS (Refer to 4.11).

4.2.2 Respondents identified 4 synthetic hydraulic oil spills during 2016 and in each incident the oil dispersed naturally. The dredger Ndurance (7,417 gt, built 2013) reported a subsea leak of synthetic biodegradable oil from an underwater plough engaged in a cable laying operation off Sizewell on 2 July. The multi-purpose offshore vessel Havila Phoenix (10,599 gt, built 2008) reported 3 synthetic hydraulic oil discharges whilst operating in nearshore waters and in the open sea off the Lincolnshire coastline during November and December. The largest incident involving a 20-litre subsea spill of Panolin HLP synthetic oil occurred after 2 hoses became detached from an underwater vehicle on 8 November.

4.2.3 Two oil spills were recorded in local ports and harbours. A residential boat sank on its moorings at the Norwich Yacht Station on 8 January causing a diesel sheen which was broken up and dispersed by propeller wash. The 11- metre motor cruiser Lotus Moon caught fire and sank on its moorings in Lowestoft marina on 18 October. A small quantity of diesel escaped from the fuel tanks of the submerged vessel and was later contained and removed from the water surface in a clean-up operation. The cruiser was later raised and brought ashore for inspection.

4.2.4 Two oil discharges were recorded in the open sea. The crude oil tanker Suvorovsky Prospect (62,504 gt, built 2011) reported a 250-litre crude oil spill during a ship-to-ship transfer operation outside UK territorial waters off Southwold on 18 January. A surveillance aircraft was tasked to examine the area and reported that the pollution was broken-up and dispersed by wave action. An investigation indicated that the mother and daughter vessels had parted and consequently the transfer hoses had split. An unidentified passing vessel was believed to have been the source of a surface sheen reported off Great Yarmouth on 21 June.

4.2.5 European Maritime Safety Agency (EMSA) CleanSeaNet radar satellite images identified a discharge of crude palm oil tank washings from the oil/chemical tanker Overseas Alcmar (30,018 gt, built 2004) in the open sea off Lowestoft on 17 March.

4.2.6 In addition to the pollution incidents above, POLREPS also referred to 2 incidents in which a number of plastic barrels were washed up on the Norfolk coastline between Mundesley and Overstrand. None were subsequently found to contain harmful substances. A POLREP and an EA report noted that oil globules observed on a beach near Hopton had originated from an old burial site for recovered pollution following the Eleni V incident off Norfolk in 1978.

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4.3 Essex and Kent

4.3.1 Twenty-one vessel-source pollution incidents were identified by reporting organisations during 2016 compared with 5 incidents during 2015. Twelve discharges occurred in local ports and harbours, 2 in nearshore waters and 1 in the open sea and there were also 6 references to beach pollution incidents. A source of pollution was identified on 14 occasions and 5 spills were caused by vessel-casualties. In addition to the incidents above, reporting organisations also provided local details relating to 2 larger-scale incidents affecting the coastline of southern England (Refer SE/189 and SE/651).

4.3.2 Port and harbour authorities reported vessel discharges at , Harwich, London, Margate and . The general cargo vessel Elvira (10,532 gt, built 2000) was identified as the source of 0.5 litre diesel spill at the on 18 May. The incident occurred following damage to the fuel line of a temporary emergency generator located on the deck of the vessel. Four reporting organisations submitted details of an incident at the Port of Harwich following a 30-litre hydraulic oil discharge from the Ro-Ro cargo ship Suecia Seaways (24,196 gt, built 1999). A fractured hydraulic pipe on the stern door of the vessel was identified as the source of the discharge and the pollution later dispersed naturally.

4.3.3 Five incidents were reported by the Authority and EA during 2016. The 38-metre river cruise catamaran Typhoon Clipper (169 gt, built 2007) was identified as the source of 2 diesel spills on 22 March and 20 July. Both incidents occurred during refuelling operations and the pollution dispersed naturally. A defective stern gland was identified as the cause of an 8-litre lubrication oil leak from the suction dredger City of Westminster (3,914 gt, built 1990) and the vessel later entered dry dock for repairs. A light sheen was reported between Westminster and Lambeth Bridges on 9 September and was later broken up and dispersed by propeller agitation. An EA report identified a salvaged pleasure craft as the source of a small diesel oil spill near the City Pier on 14 October.

4.3.4 Three incidents were reported by Peel Ports Medway during 2016. A pleasure craft was believed to have been the source of a 10-litre diesel oil discharge at Bridge Reach on 18 March. The derelict partly submerged canal tug Water Haigh (59 gt, built 1959) was identified as the source of a diesel oil sheen near Strood Pier on 4 October. Members of the public alerted the authorities to a diesel spill after a pleasure craft sank on its moorings at Bridge Reach on 22 November. Thanet District Council completed 2 clean- up operations following fuel oils spills from a workboat and a fishing vessel in Margate Harbour.

4.3.5 Reporting organisations submitted details of 6 beach pollution incidents at various locations along the Kent coastline including Herne Bay, Minnis Bay, St Mary’s Bay and Whitstable. Most involved small quantities of fuel oil, waxy materials and palm oil and clearance operations were completed following each incident. The most extensive incidents involved lumps of a paraffin type of petroleum based wax washed ashore along stretches of

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shoreline between Dungeness and St Mary’s Bay during October and between Littlestone and Sandwich Bay during November.

4.3.6 Two incidents were reported in nearshore waters during 2016. A greasy surface film occupying an area of approximately 7,000 square metres was observed off the Blackwater Estuary on 15 April. A small diesel spill was reported after the 9-metre angling boat Seawolf ran aground at Walpole Bay on 7 November.

4.3.7 In the open sea the 17-metre fishing vessel Star Bonaire capsized and sank off Ramsgate.

4.3.8 In addition to the pollution incidents above a POLREP and a Kent County Council report referred to an incident in which a 20-litre plastic drum containing an unidentified liquid was washed up on a beach near Walmer. A waste contractor was engaged to recover the drum and safely dispose of its contents.

4.4 Southern England (East and West Sussex, Hampshire, Dorset and the Isle of Wight)

4.4.1 Reporting organisations identified 19 pollution incidents attributed to vessels during 2016 compared with 16 incidents during 2015. Fourteen recorded incidents were in ports and harbours and 8 spills were caused by vessel casualties. A source of pollution was identified on 17 occasions including 8 pleasure craft, 3 fishing vessels, 3 warships and 2 high speed catamaran passenger vessels and a workboat. Fuel oils were identified as pollutants on 13 occasions and there were 2 references to beach pollution incidents.

4.4.2 Oil discharges resulting mainly in surface sheens were reported in local ports and harbours at Cowes, Emsworth, Hamble, Poole, Portsmouth, South Hayling and Weymouth. Cowes Harbour Commission provided details of 2 incidents during 2016. Booms were deployed in a clean-up operation after the 9-metre catamaran Twin Wakes sank whilst on moorings at the Trinity Landing and the vessel was later recovered. The 7-metre leisure fishing craft Nelly T sank on moorings at the Town Quay on 25 August and a small quantity of diesel oil was later recovered during a clean-up operation. A POLREP referred to a diesel spill from the pleasure craft Saga at the Hamble Marina during a refuelling operation on 19 July.

4.4.3 Commissioners reports identified the high-speed trimaran Condor Liberation (6,307 gt, built 2010) as the source of 2 pollution incidents during 2016. The first incident occurred on 12 January following a discharge of 27 litres of light hydraulic oil alongside the Ro-Ro berth. The pollution was broken up and dispersed by the propeller action of a pilot boat. A second incident was reported on 16 March following a small diesel spill from a ruptured fuel tank on the ramp of the vessel. The pollution dispersed naturally and no further actions were required.

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4.4.4 Six incidents were reported by QHM Portsmouth during 2016. The discharges were attributed to 3 warships, 2 pleasure craft and a fishing vessel. Human error by a contractor was identified as the cause of a 50-litre diesel spill from the Daring-class air defence destroyer HMS Dragon on 7 March. The pollution was broken up and dispersed by propeller agitation. A small boat boom and propeller agitation by a tug were employed in a clean- up operation following a 30-litre AVCAT spill from a warship berthed at the Fountain Lake Jetty on 6 June. Overfilling during a refuelling operation was reported as the cause of a 25-litre fuel oil spill from a warship berthed at the North Corner Jetty. A sorbent boom was deployed in a clean-up operation. A ribbon of oil was observed after a speed boat sank on its mooring on 11 January. The 18-metre yacht Sunsail 4015 ran aground and keeled over near Ryde on 3 June causing a 5-litre discharge of diesel oil through a breather pipe. The vessel was later towed away and the pollution was quickly dispersed by wave action. A light oil sheen was reported after the 7-metre wooden-hulled fishing vessel La Coguet (2.89 gt, built 1976) ran aground off the South Parade Pier on 12 April.

4.4.5 An EA report referred to a diesel oil discharge from a pleasure craft berthed at the Sparkes Marina on Hayling Island. Three reporting organisations provided information on an incident following a 32-litre diesel spill from the 10-metre motor boat Indecision in Weymouth Harbour on 8 July. The discharge was traced to a fuel tank overflow and the pollution later dispersed naturally.

4.4.6 Reporting organisations identified 3 oil discharges from vessels in nearshore waters and the open sea and all were broken-up and dispersed by wave action and posed no threat to the shoreline. An unknown quantity of diesel oil escaped to sea from the fuel tanks of the 11-metre motor cruiser Just Wandering that caught fire and sank off Langney Point near Sovereign Harbour. A split hose was identified as the cause of a 5-litre hydraulic oil discharge from a windfarm vessel in the on 25 October. A diesel sheen mixed with flotsam was observed after the 10-metre MFV Tracey capsized and sank while hauling in pots in Lyme Bay off West Bexington.

4.4.7 Two beach pollution incidents were reported during 2016. Between 24 January and 9 February generally small quantities of white crystalline paraffin wax residues were washed ashore at various points along the coastline of southern England and Kent between Milford-on-Sea and East Wear Bay . Clearance operations were organised by some local authorities taking up to 14 days to complete. One-tonne of the waxy material was collected from the foreshore between Sandgate and Folkestone Warren in Kent and likewise 1.5 tonnes between Lancing and Shoreham in West Sussex. A second smaller scale incident involving white crystalline paraffin wax lumps, up to tennis ball in size, occurred between the first week of April and the first week of May. On this occasion intermittent shoreline pollution was reported between Shoreham in West Sussex to St Mary’s Bay in Kent. Clearance operations were completed over a 2-day interval.

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4.4.8 In addition to the pollution incidents outlined above reporting organisations also provided details of 3 incidents involving recovery and removal of lost cargoes washed ashore. During the last week of January at least 100 wooden planks and pallets were washed up on the shoreline between and Hastings. The timber was believed to have come from the general cargo vessel Koningborg (6,142 gt, built 1998) which lost part of its deck cargo in rough weather off the Channel Islands on 6 January. Hundreds of Chinese cigarette packets were washed ashore along a 6 km stretch of Chesil beach on 22 February and may have been part of the cargo lost overboard from the containership Svenborg Maersk (92,198 gt, built 1998) in the Bay of Biscay on 14 February 2014 (Refer 4.4.9 2014 report). A large suspect package covered in plastic was recovered and removed from a Saltdean beach on 10 April.

4.5 South West England (Devon, Cornwall, Isles of Scilly, Channel Islands and the Western Approaches)

4.5.1 Eleven vessel-source pollution incidents were identified by reporting organisations during 2016 compared with 18 incidents during 2015. Eight discharges occurred in ports and harbours, 1 in the open sea, 1 in nearshore waters and there was also a reference to a beach pollution incident. A source of pollution was identified on 10 occasions, the sources including 3 fishing vessels, 3 pleasure craft, 2 barges, a warship and a wreck.

4.5.2 Seven mineral oil discharges and a fish oil spill were reported in ports and harbours at Dartmouth, Fowey, Plymouth, Newlyn, Sutton, Tor Bay and Truro. The 22-metre polyester resin hulled demersal stern trawler Saint Christophie 1 (145 gt, built 1984) listed over and sank onto her starboard side on the seabed next to her berth alongside the South Embankment Quay wall at Dartmouth on 10 March. An immediate tier-2 incident response was initiated with two booms rigged around the vessel. Divers penetrated the engine room and shut off all fuel valves on the tanks to prevent fuel leaks and also sealed the fuel tank air vents with underwater expanding foam. Absorbent pads and disc skimmers recovered approximately 2 tonnes of diesel oil from the surface of the water within the booms. The vessel was salvaged on 2 April 2016, but was declared a constructive total loss by its insurance company.

4.5.3 The pleasure craft Scottish Lass was identified as the source of a 2-litre lubrication oil discharge in Fowey Harbour on 11 July. Harbour staff completed a clean-up operation with the use of absorbent materials. An EA report and a POLREP described 2 incidents at Plymouth during 2016. A barge capsized at the Western Mill Lake on 10 March causing a 227-litre diesel spill. A clean-up operation was managed by QHM Plymouth deploying containment booms and absorbents. A diesel sheen was broken up and dispersed by propeller agitation after a mooring barge capsized in the River Tamar on 9 May.

4.5.4 Newlyn Harbour Commissioners provided details of a 5-litre fish oil discharge from the MFV Zilvermeeuw (236 gt, built 1975) on 1 March. A

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pleasure craft was identified as the source of a 25-litre diesel spill at Bayley’s Wharf in Sutton Harbour. A detached fuel hose to a seaboat was identified as the cause of a 150-litre diesel oil spill from the multi-role hydrographic survey ship HMS Echo anchored in Tor Bay Harbour on 28 March. An oil sheen extending for 1.6 km was left to disperse naturally. A clean-up operation was completed following a diesel oil discharge from a pleasure craft at Truro on 9 May.

4.5.5 Two oil spills were recorded in nearshore waters and the open sea during 2016. A POLREP and a Cornwall Council report referred to an incident 10 August after the 6-metre fishing boat San Maria 2 caught fire and sank in Widemouth Bay. An oil sheen and debris were later observed in the area. A fishing vessel trawled up the wreck of the 8-metre angling vessel Elizabeth 2 off Hopes Nose causing a minor diesel sheen which dissipated once the wreck was dropped back to the sea bed.

4.5.6 Lumps of palm oil were washed ashore along a 11 km stretch of the North Cornwall coastline between Constantine Bay and Trevose Bay during the first week of January. Contractors were engaged to complete clearance operations.

4.5.7 In addition to the pollution incidents above, 4 reporting organisations also referred to 2 lost cargo clearance and recovery incidents. During January approximately 24,000 pink one-litre plastic detergent bottles, most in an empty condition, were washed ashore at several locations along the Lizard Heritage Coast and in Mounts Bay. Cornwall County Council coordinated clearance operations with the support of NGOs including The National Trust, local harbour authorities and volunteers. Surveillance flights were undertaken to determine the quantities at sea. The expenses incurred in clearance operations were met by the product manufacturer Reckitt Benckiser. The bottles were carried in one of three box containers lost overboard in rough weather from the containership DS Blue Ocean (7,545 gt, built 2007) 26 km off Lands End on 19 May 2015 (Refer ACOPS 2015 4.5.10). In a separate incident a large block of rubber was removed from a beach in Constantine Bay on 3 February.

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 Five incidents were reported during 2016, the same number as the previous year. Three discharges occurred in ports and harbours, 1 in nearshore waters and there was also a reference to a beach pollution incident. Sources of pollution were identified on 4 occasions including 2 pleasure craft, a fishing vessel and a tug.

4.6.2 Absorbent pads were deployed during a pleasure craft salvage operation at Portishead Quay Marina on 15 May. A Pembrokeshire County Council report and a POLREP referred to a clean-up operation following a 1-litre lubrication oil discharge from the 10-metre fishing vessel Marianne in the

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Lower Town Harbour at Fishguard on 17 August. Three reporting organisations submitted details of a 10-litre oily water discharge from the tug Svitzer Caldey (590 gt. built 2009) at the Port of Pembroke. The incident occurred when a hose was disconnected before a draining down procedure had been completed. An absorbent boom and pads were used to recover the oil.

4.6.3 In nearshore waters a POLREP described an incident on 5 October after a yacht broke her moorings and grounded on the foreshore causing a petrol spillage.

4.6.4 A clearance operation was completed after scattered lumps of palm oil were washed-up on beach at Fishguard on 12 May.

4.7 Irish Sea (Ceredigion, Gwynedd, Isle of Anglesey, Conwy, Denbighshire, Flintshire, , Lancashire, , Isle of Man and all Districts of Northern Ireland)

4.7.1 Respondents identified 24 discharges from vessels during 2016 compared with 14 discharges during the previous year. Seventeen incidents occurred in ports and harbours and 7 in the open sea, estuaries and nearshore waters. A source of pollution was identified on 22 occasions and 8 spills were caused by vessel casualties. Details of accidental releases from oil and gas installations operating in are included in the statistics for the UKCS (Refer to 4.11).

4.7.2 Thirteen incidents were reported in the ports and harbours of north-west England area during 2016 including 6 discharges of mineral oils and vegetable oils at the port of Liverpool. A manifold pipe failure was identified as the cause of a 1-tonne rapeseed oil spill from the tank barge The Crosby (built 2013) on 25 January. The pollution was contained in the Gladstone branch dock 2 and the port pollution control vessel Polgarth assisted in a clean-up operation. The ton-class minesweeper HMS Bronington (launched 1953), belonging to the Warship Preservation Trust, partially sank on her moorings at Birkenhead Docks on 18 March. A boom was placed around the vessel to contain a 2-litre fuel oil spill and the vessel was later scrapped.

4.7.3 A tier 2 counter-pollution operation was carried out following a 3-tonne palm oil spill from chemical/oil products tanker Stenaweco C. Corrado (29,846 gt, built 2015) at the South East Canada No 1 dock. A ruptured cargo hose was identified as the cause of the incident. A diesel sheen was reported at the Cruiser Liner Terminal on 10 September and attributed to a passing vessel. A tank overflow from a deck vent during a bunkering operation was identified as the cause of a 5-litre gas oil spill from the tug Smit Waterloo (298 gt, built 1987) at the Huskisson Dock Number 1. A capsized pleasure craft was identified as the source of a small petrol spill on 19 October.

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4.7.4 Three incidents were recorded in other Merseyside ports and harbours. A Company Limited report referred to a 205-litre diesel spill from the containership Doris T (999 gt, built 1977) at Ellesmere Port. The incident occurred during a bunkering operation and a tier 2 counter-pollution operation was successfully completed. The passenger ferry Royal Iris (611 gt, built 1960) ran aground at Eastham Docks on 10 July causing a minor leakage of lubrication oil from damaged stern glands. A POLREP referred to a 25-litre diesel spill from the 9-metre sailing yacht Riprap on 4 August.

4.7.5 Elsewhere in north-west England 4 oil spills were reported in ports and harbours at Barrow, and Workington. Barrow Borough Council submitted details of a 100-litre diesel discharge from the trawler Talisker at the on 4 January. The pollution dispersed naturally and no further actions were required. A second smaller incident occurred in the same location on 18 May. The 31-metre fishing vessel Noordzee (172 gt, built 1980) was identified as the source of a 40-litre diesel spill at Silloth. A clean-up operation was completed and the costs were charged to the owners of the vessel. A Port of Workington report referred to a 30-litre diesel oil discharge from the suction dredger Grete Fighter (582 gt, built 1980) on 16 February.

4.7.6 Four oil discharges were recorded in the nearshore waters and in the open sea off the coast of north-west England during 2016. An unidentified vessel was believed to have been the source of a large diesel sheen observed in the open sea off on 12 June. A POLREP and a Lancashire County Council report referred to a 20-litre diesel spill after the 7-metre yacht Whisper heeled over on a drying mooring. A ROV operating from the utility vessel Zwerver II (499 gt, built 2016) was identified as the source of a 2- litre hydraulic oil discharge at the Burbo Bank windfarm in Liverpool Bay on 27 August. The cable layer Willem De Vlamingh (6,807 gt, built 2011) reported a small lubrication oil discharge in the same location on 10 September.

4.7.7 Reporting organisations in and mid-Wales provided details of 5 incidents during 2016. Three reporting organisations submitted details of a 50-litre diesel spill from high speed craft Codrington Arrow (152 gt, built 1988) at Holyhead on 17 January. The incident occurred during an internal tank transfer operation and contractors deployed booms during a clean-up operation in the inner harbour. A POLREP referred to an oily bilge water discharge from a fishing vessel operating in Aberystwyth Harbour on 11 February.

4.7.8 Following an engine failure the 11-metre motor cruiser La Babe ran aground and sank at Puffin Island causing a small spillage of gear oil. The vessel was refloated several days later and there were no further reports of any pollution. Natural Resources Wales were informed of a 0.05 litre hydraulic oil spill from a survey vessel operating in Cemaes Bay on 1 August. The vessel was taken off-station and into Holyhead port for an examination of a thruster unit. A ROV operating from the utility vessel Zwerver II (499 gt,

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built 2016) was identified as the source of a 0.5 litre hydraulic oil spill off Rhyl on 11 October.

4.7.9 Reporting organisation in Northern Ireland and POLREPS identified 2 oil pollution incidents during 2016. On 2 February the 10-metre pilot boat Challenger sank on her mooring in Portstewart Harbour during a storm causing a 600-litre diesel oil spill. A tier 2 counter-pollution operation was successfully completed and the vessel was later craned ashore. The 6-metre yacht Sunrise sank at Portaferry in Strangford Lough on 11 September. Approximately 60 litres of petrol leaked from the vessels fuel tanks and quickly evaporated.

4.7.10 In addition to the pollution incidents above, POLREPS also referred to 2 incidents involving possible lost cargoes. A leaking 200 litre oil drum was observed in the open sea off on 2 August. A sealed 1,000-litre IBC holding red diesel was washed ashore next to the RAF Valley Airfield on Anglesey and was later recovered by contractors.

4.8 Western Scotland (Dumfries and Galloway, Ayrshire, Inverclyde, Argyll & Bute and the Highlands & Islands Region to )

4.8.1 Reporting organisations submitted details of 25 vessel-source pollution incidents during 2016 compared with 20 during the previous year. Nineteen oil discharges were reported in local ports or harbours and 6 oil discharges in nearshore waters and the open sea. A source of pollution was identified on 23 occasions including 14 fishing vessels. Further analysis of the information contained in annual returns showed nine oil spills followed vessel casualties comprising 4 fishing vessels, 2 pleasure craft, an oil rig and a Ro-Ro passenger vessel.

4.8.2 Vessel-casualty spills were recorded during April, August, September and October 2016. The 15-metre crabber Louisa (42 gt, built 2009) sank whilst anchored off the island of Mingulay on 9 April and a diesel sheen and floating debris were later observed near the wreck site. The vessel was later raised and transported to Glasgow for further examination. A POLREP and a SEPA report provided details of a marine diesel spill after the 12-metre fishing vessel Alex C sank in Mallaig Harbour on 30 April. An absorbent boom was deployed during a clean-up operation.

4.8.3 An Argyll and Bute Council report referred to an incident on 3 August after the fishing vessel Perseverance (6.18 gt, built 1975) sank alongside the Old Quay at Campbeltown on 3 August. Harbour staff deployed booms in a clean-up operation and the vessel was raised and re-floated on the following day. The semi-submersible drilling rig Transocean Winner (17,580 gt, built 1983) detached from its tug during towing in severe weather and subsequently ran aground onto rocks near Dalmore Bay on the Isle of Lewis. Two of the rigs 4 fuel tanks were damaged resulting in 53 tonnes of diesel entering the water, which later dispersed in naturally rough conditions. A clean-up operation was completed after the yacht Spirit of Kenbane sank in the James Watt Dock at Clydeport on 24 August.

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4.8.4 On 4 September a leisure fishing vessel ran aground and sank between Mallaig and Knoydart near the entrance to Loch Nevis. Approximately 25 litres of engine oil leaked in to the water and later dispersed naturally. The Caledonian MacBrayne Ro-Ro-ferry Hebrides (5,506 gt, built 2001) suffered an engine control malfunction while berthing at Lochmaddy Pier and was unable to reduce speed. Consequently the vessel struck a harbour wall and ran aground at the local marina causing damage to the starboard propeller shaft after chains from a pontoon became entangled. Approximately 200 litres of stern tube leaked into the harbour and later dispersed naturally. The ferry was taken out of service for repairs at a dry dock in Greenock. A diesel sheen extending for more than 1.6 km was reported after the creel boat An Cuantach (7.3 gt, built 1984) sank off Garenin on the Isle of Lewis.

4.8.5 Reporting organisations identified 4 bunkering spills in ports during 2016. Booms were used in containment and cleaning following a 200-litre diesel spill from the MFV Endeavour in Kinlochbervie Harbour on 27 February. A POLREP referred to a 40-litre diesel spill from the trawler Gleaner CN777 at on 1 September and absorbent booms were deployed in a clean- up operation. Human error during a refuelling operation was identified as the cause of a 400-litre diesel spill from the trawler Roseland (242 gt, built 2000) in Lochinver Harbour on 1 December. A Clydeport report referred to a 2-litre diesel spill from the tug Svitzer Milford (384 gt, built 2004) at Greenock. In addition to the bunkering spills above, a Council Harbour’s report provided details of a 200-litre gas oil discharge from the 46-metre trawler Jean Claude Coulon II (1,000gt, built 2005) in Lochiver Harbour on 12 September. The incident occurred during an onboard fuel transfer operation and 6 absorbent booms were deployed in a clean-up operation.

4.8.6 Elsewhere oil pollution incidents were recorded in ports and harbours at Ardrossan, Canna, Crinnin, Glensanda, Kennacraig, Kirkudbright, Kyleakin, and . Absorbent pads were deployed in a clean-up operation following a 3-litre oil discharge from a fishing vessel in Ardrossan Harbour. A cracked fuel tank was identified as the cause of a diesel spill from the 18-metre twin- rigged trawler Contest (127 gt, built 1985) at Canna on 26 November. The pollution dispersed naturally and no further actions were required. Contractors were engaged to assist in a clean-up operation at the Crinan canal basin following a diesel spill from a pleasure craft. The self- discharging bulk carrier Yeoman Bridge (55,695 gt, built 1991) reported a 5- litre gas oil discharge at the Glensanda Quarry loading quay and a split hose was identified as the cause of the incident. A ruptured hose line caused a 5- litre hydraulic oil discharge from the Ro-Ro passenger vessel Finlaggan (5,626 gt, built 2011) at the Kennacraig ferry terminal on 10 July.

4.8.7 A Dumfries and Galloway Council report provided details of an incident at Kirkcudbright Harbour after a small quantity of diesel oil was washed off the deck of a fishing vessel after maintenance. An absorbent boom was deployed to recover the pollution. A light sheen drifted into Kyleakin Harbour on 14 February following an earlier bilge water discharge from an unidentified

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vessel offshore. An ABP Troon report referred to a clean-up operation following a lubrication oil discharge from a fishing vessel on 21 October.

4.9 Orkney and Shetland Islands

4.9.1 Respondents identified 8 discharges attributed to vessels during 2016 compared with 9 discharges during the previous year. Three incidents occurred in ports and harbours and the remainder in the open sea. The sources of discharges included 3 fishing vessels, a supply launch, a regional support vessel and a semi-submersible accommodation rig. Accidental releases from oil installations operating in the West Shetland Basin were included in the statistics for the UKCS (Refer to 4.11).

4.9.2 Orkney Islands Council Marine Services submitted details of 3 incidents in ports during 2016. The wreck of the former fishing vessel and diveboat Adlegrund was believed to have been the source of a diesel sheen observed in Kirkwall Harbour on 14 April. The semi-submersible accommodation platform Regalia (17,624 gt, built 1985) reported a 20-litre diesel discharge at Scapa Flow on 15 April. The pollution dispersed naturally and no further actions were required. A small diesel spill was attributed to the supply launch John Jolly at Scapa on 13 October.

4.9.3 Five incidents were recorded in the open sea including 2 vessel-casualty spills. On 21 January the 16-metre wooden potter Majestic (51 gt, built 1977) sank off the Point of Fethaland following a flood in the engine room. A diesel sheen and debris, including fish boxes, were later observed. A diesel slick extending for 1.6 km was observed after the 10-metre leisure fishing vessel Hope III (7.9 gt, built 1971) took on water and sank off on 8 July. The owner of the vessel appeared before the Lerwick Sheriff Court on 18 January 2017 after pleading guilty to being under the influence of alcohol and was fined £1,000.

4.9.4 A fishery patrol aircraft reported sighting a surface slick with rainbow colours extending for 900 metres off Cape Wrath on 1 June. A POLREP referred to an incident on 9 June after an unidentified brown sludge substance was observed floating in the open sea off Orkney. The regional support vessel Caledonian Vision (5,729 gt, built 2006) reported a small leak from a thruster motor on 17 July.

4.9.5 In addition to the pollution incidents above the containership Arnarfell (8,830 gt, built 2005) lost ten box containers overboard in rough weather north west of mainland Shetland on 8 August.

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 incidents were recorded by reporting organisations during 2016, eleven more than the previous year’s total. Analysis of incidents by marine environmental zones showed 19 spills occurred in ports and

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harbours, 2 in the open sea, 1 in nearshore waters and there was also a reference to a beach pollution incident. The source of the pollution was identified on 21 occasions comprising 6 offshore support/supply vessels, 4 fishing vessels, 3 pleasure craft, 3 tugs, 3 workboats, 2 barges and a tanker. At least 4 incidents were known to be caused by vessel casualties.

4.10.2 Aberdeen Harbour Board provided details of 4 oil discharges during 2016 compared with 3 discharges during 2015. Divers were employed to investigate the source of a 10-litre lubrication oil spill from the supply vessel Highland Prestige (3,702 gt, built 2007) at the Torry Quay on 11 February. A high pressure hydraulic pipe failure was identified as the cause of a 2-litre hydraulic oil spill from the offshore supply ship Vos Prospector (1,734 gt, built 2008) at the Regent Quay on 3 May. The tug Hemiksem (323 gt, built 1985) reported a 10-litre gas oil spill at the Albert Quay on 6 September. The incident was caused by a tank overflow during an internal fuel transfer operation. A pipe failure caused a 5-litre hydraulic oil spill from the offshore supply ship Vos Enterprise (1,734 gt, built 2010) on 28 September.

4.10.3 Elsewhere, reporting organisations recorded 15 oil spills in ports and harbours at Buckie, Burghead, Cromarty Firth, , Firth of Forth, Gardenstown, Hopeman, Newhaven, Peterhead and Port Edgar. Booms were deployed in a clean-up operation in Buckie Harbour following an oily water bilge discharge from the fishing vessel Jasper. A Moray Council report and a POLREP described an incident at Burghead Harbour following a 20-litre diesel spill from the 11-metre trawler Pegasus (15.49 gt, built 1990). Booms were deployed in the clean-up operation completed by harbour staff. Four oil spills were reported by the Cromarty Firth Port Authority during 2016. A 50- litre diesel bunkering spill was reported at the Nigg Enery Park on 4 October.

4.10.4 A small hydraulic oil leak from a crane was reported by the pipelaying vessel Deep Energy (25,378 gt, built 2013) at Invergordon on 8 October. The tug Tuacher O Wulf reported an accidental 10-litre diesel spill during a bunkering operation and the pollution later dispersed naturally. POLREPS and a Cromarty Firth Port Authority report described an incident on 11 December after the Caledonian Towage workboats Bustler (11.7 metre general purpose workboat) and Teal (8.5 metre tug workboat) sank alongside a berthing barge in the West Harbour at Invergordon on 11 December. A maximum of 500 litres of marine gas oil leaked from the 2 sunken vessels into the harbour. An absorbent boom was deployed across the harbour entrance to contain the pollution and a clean-up operation was completed by harbour staff. Both vessels were later refloated without any further reports of pollution. A leaking propeller shaft was believed to have been the cause of a hydraulic oil discharge from the diving support vessel Seawell (9,158 gt, built 1987) in Dundee Harbour and a clean-up operation was later completed.

4.10.5 Five oil spills were recorded in the Firth of Forth and adjacent ports and harbours during 2016 and all dispersed naturally without posing a risk to the shoreline. The barge Neptune was the source of a minor oily water discharge

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near the North Tower site of the new Forth Road bridge on 22 January. An 8-metre creel boat sank at the Methil boat club on 6 February and was later re-floated. A POLREP referred to an incident in Newhaven Harbour following a minor leak of hydraulic fluid from the 15-metre multi-role workboat Forth Linesman. The yacht Seamist reported a 0.5 litre spill of diesel oil during a refuelling operation at Port Edgar Marina on 26 July. On 15 September the tug Seal Carr (251 gt, built 1983) reported an accidental loss of 180 litres of light hydraulic oil from a voith unit and the propulsion system was stopped and closed-off with no further loss of oil.

4.10.6 A diesel sheen was observed after the 6.5-metre fibre-glass fishing vessel Ruby (1.07 gt, built 2007) sank in Gardenstown Harbour on 4 January. A Moray Council report described an incident on 21 July after a pleasure craft sank in Hopeman Harbour. An absorbent boom was towed over the polluted area and recovered a small quantity of diesel oil. A ruptured bunker hose caused a 100-litre diesel spill from the offshore supply vessel Brage Supplier (4,059 gt, built 2011) alongside the Asco South Base at Peterhead on 25 September. A clean-up operation was completed on the same day in which contractors boomed the area around the vessel and recovered the spilt oil.

4.10.7 Three incidents were reported in nearshore waters and in the open sea during 2016. Three reporting organisations submitted details of an incident on 18 May after the pleasure craft Opportune ran aground on rocks outside Rosehearty Harbour. A diesel sheen and debris were later observed. The crude oil shuttle tanker Aberdeen (47,274 gt, built 1996) reported a slight leak of hydraulic oil from a bow thruster in the open sea off Troup Head. A passing vessel was believed to have been the source of an oil sheen reported by the Blackford Dolphin installation on 11 August.

4.10.8 Three reporting organisations referred to a beach pollution incident after weathered crude oil residues in globule form, up to 15 cm in diameter, were washed ashore at 3 different locations along the and Caithness coastline during the last week of April. At least one clean-up operation was completed by Highland Council staff at Achninver beach.

4. 11 United Kingdom Continental Shelf

4.11.1 The statistics for this enumeration area were again compiled from POLREP reports submitted by the MCA and PON1 reports submitted by DECC (Department for Business, Energy and Industrial Strategy from 14 July 2016). Operators are required to notify DECC where an unauthorised release of oil or chemical to sea, regardless of volume, has occurred. Each incident is reported on a PON1 to DECC’s Offshore Environmental Inspectorate, MCA, the Joint Nature Conservation Committee (JNCC) and .

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

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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 releases 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 unplanned releases of oil or chemicals, regardless of volume, must be notified to the relevant authorities. Releases 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 releases, 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 releases of 2 tonnes or more.

4.11.5 A total of 341 oil releases were attributed to oil and gas installations operating in the open sea during 2016 including the west Shetland Basin, Liverpool Bay and off the coast of eastern England. The 2016 annual total was 52 more than the mean annual total of 289 releases reported between 2000 and 2015. Analysis of oil types showed that 46% of reported releases were identified as lubrication and hydraulic oils, followed by 26% fuel oils and 15% crude oils. The corresponding statistics from the 2015 survey were 49%, 19% and 9%. The largest spill, 4.8 tonnes of diesel oil, occurred at the Golden Eagle PUQ platform on 5 September.

4.11.6 In addition, the authorities were notified of 227 releases of chemical substances during 2016 compared with 193 releases during the previous year. These chemicals are routinely used in oil and gas exploration and production operations and included barite, caustic soda, glycol solutions, hydraulic fluids, lime, methanol, potassium chloride brine and sodium solutions.

4.11.7 The estimated volumes of unpermitted chemical releases ranged from less than 0.0005 kg to 213,088.80 kg and 48 releases (including ongoing releases) 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.

4.11.8 Of the total chemicals spilled in 2016 approximately 85% 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,

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which are considered to pose the greatest hazard. None of the spill incidents resulted in a significant environmental impact.

4.11.9 The PON1 reports again indicated that remedial actions were taken by operators following accidental releases. 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 4.11.10 A further 17 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 ml to 1.8 tonnes. In each incident the pollution was believed to have dispersed naturally without posing a threat to wildlife or the coastline.

4.11.11 The Alba FSU installation reported a 1.8 tonne oil sheen on 17 August. On 2 October the Dunlin installation reported a crude oil sheen covering an area of 1.23 km2 with an estimated an estimated maximum volume of 0.8164 tonnes.

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Page 44 of 45

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 2016 survey. For example, other sources of information were consulted 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 (BEIS from 14 July 2016) and MCA describing accidental discharges from oil and gas installations operating in the UKEEZ. For the remaining discharges from vessels 25% of individual incident reports were compiled from questionnaire returns submitted by two or more reporting organisations which was 6% less 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 for Business, Energy and Industrial Strategy (from 14 July 2016) Department of Energy and Climate Change (to 13 July 2016) Environment Agency for England English Inshore Fisheries and Conservation Authorities Local Government Association Maritime & Coastguard Agency’s Counter Pollution and Response Team Natural Resources Wales 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 Limited

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Page 45 of 45

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 Incident Positional Latitude Longitude Category Incident Incident Incident Source Comments Date Description Type Amount Units NE/001 21/01/2016 Scarborough Harbour 54.29 -0.40 Oil Diesel 50 litres MFV Scarlett Lou Vessel sank, clean-up completed. NE/706 26/02/2016 53-50N: 01-24W 53.83 -1.40 Oil Nk 12.75 litres Unidentified vessel Reported by the Rough installation. NE/645 03/06/2016 53-42N: 00-20E 53.70 0.34 Oil Gas 40 litres MDREDGER UKD Marlin Oil dispersed naturally. NE/010 05/07/2016 Whitby Harbour 54.48 -0.22 Oil Diesel 20 litres Workboat Stony Broke Vessel sank, clean-up completed. *NE/009 10/07/2016 Warkworth Harbour 55.34 -1.59 Oil Diesel 0.2 litres Unidentified vessel Sheen dispersed naturally. NE/015 20/07/2016 54-54N: 01-12W 54.90 -1.20 Oil Diesel Nk Nk HMS Bulwark Clean-up completed. NE/026 27/09/2016 PD Teesport 54.59 -1.19 Oil Hydraulic 7 litres MSV Havila Phoenix Oil dispersed naturally. NE/027 06/10/2016 Whitby Harbour 54.49 -0.22 Oil Diesel Nk Nk Unidentified vessel Sheen dispersed naturally. NE/029 20/11/2016 River Humber 53.91 0.20 Oil Crude 10 litres MT Ridgebury Alice M Clean-up completed. NE/030 21/11/2016 55-13N: 01-01W 55.22 -1.02 Oil Lubrication 600 litres MT Happy Bird Contents of damaged drums lost overboard. NE/72 01/12/2016 54-34N: 02-17E 54.57 2.28 Oil Nk 300 litres Unidentified vessel Reported by Cygnus A installation. NE/032 02/12/2016 55-06N: 01-24W 55.27 -1.62 Oil Diesel Nk Nk Unidentified vessel Sheen dispersed naturally.

2: EASTERN ENGLAND (*Incident not identified by POLREP) Reference Incident Positional Latitude Longitude Category Incident Incident Incident Source Comments date description type amount unit *EE/701 08/01/2016 Norwich Yacht 52.6284 1.3062 Oil Diesel Nk Nk Pleasure craft Vessel sank on mooring. Station EE/646 18/01/2016 59-19N: 02-02E 52.3222 2.05 Oil Crude 250 litres MT Suvorovsky Prospect Split transfer hose. EE/647 17/03/2016 52-28N: 02-21E 52.4833 2.3528 Vegetable Palm oil Nk Nk MT Overseas Alcmar Discharge of tank washings. EE/056 21/06/2016 52-50N: 01-48E 52.833 1.8 Oil Nk Nk Nk Unidentified vessel Sheen dispersed naturally. EE/057 02/07/2016 52.12N: 01-41E 52.2097 1.69027 Chemical Hydraulic Nk Nk MDREDGER Ndurance Synthetic biodegradable oil dispersed naturally. EE/071 18/10/2016 Lowestoft Marina 52.4805 1.7022 Oil Diesel Nk Nk PC Lotus Moon Vessel caught fire and sank. EE/073 08/11/2016 52-56N: 00-18E 52.933 0.3 Chemical Hydraulic 20 litres MSV Havila Phoenix Leak from underwater vehicle. EE/076 17/12/2016 53-06N: 00-32E 53.1139 0.54166 Chemical Hydraulic 15 litres MSV Havila Phoenix Hose failure oil dispersed naturally. EE/090 18/12/2016 53-06N: 00-32E 53.1139 0.54166 Chemical Hydraulic 10 litres MSV Havila Phoenix Leak from trenching vehicle.

3: ESSEX AND KENT (*Incident not identified by a POLREP) Reference Incident Positional Latitude Longitude Category Incident Incident Incident unit Source Comments date description type amount EK/096 27/02/2016 Whitstable 51.3736 1.0372 Oil Fuel Nk Nk Workboat Clean-up completed. *EK/097 18/03/2016 Port of Medway 51.4019 0.5047 Oil Diesel 10 litres Pleasure craft Oil dispersed naturally. *EK/098 22/03/2016 Port of London 51.5039 0.0111 Oil Diesel Nk Nk HSC Typhoon Clipper Oil dispersed naturally. EK/103 15/04/2016 51-45N: 01-05E 51.755 1.1203 Other Nk 7,000 square metres Unidentified vessel Greasy film dispersed naturally. EK/105 18/05/2016 Port of Dover 51.1157 1.3333 Oil Diesel 0.5 litres MV Elvira Oil dispersed naturally. EK/055 23/05/2016 Port of Harwich 51.9606 1.3078 Oil Hydraulic 30 litres Ro-Ro Suecia Seaways Oil dispersed naturally. EK/119 20/07/2016 Port of London 51.5122 0.0136 Oil Diesel 10 litres HSC Typhoon Clipper Sheen dispersed naturally. EK/128 30/07/2016 Port of London 51.5033 0.0275 Vegetable Lubrication 16 litres MDREDGER City of Sheen dispersed naturally. Westminster *EK/134 01/09/2016 Margate Harbour 51.3909 1.3789 Oil Diesel 2 litres Workboat Clean-up completed. EK/138 09/09/2016 Port of London 51.5009 -0.1223 Oil Bilge Nk Nk Unidentified vessel Clean-up completed. *EK/142 20/09/2016 Herne Bay 51.3721 1.11 Oil Waxy 1 litres Unidentified vessel Clearance operation completed. EK/144 04/10/2016 Port of Medway 51.4 0.5 Oil Diesel Nk Nk TUG Water Haigh Derelict vessel leaking oil. EK/147 07/10/2016 South Kent Oil Paraffin wax 10 kms Unidentified vessel Clearance operations completed. *EK/151 14/10/2016 Port of London 51.5068 -0.0841 Oil Diesel Nk Nk Pleasure craft Oil dispersed naturally. *EK/154 19/10/2016 Minnis Bay 51.3792 1.2829 Oil Wax 1 litre Unidentified vessel Clearance operation completed. EK/155 27/10/2016 Margate Harbour 51.6533 1.6417 Oil Diesel Nk Nk MFV Lady Pat Clean-up operation completed. EK/157 07/11/2016 Walpole Bay 51.4011 1.4033 Oil Diesel Nk Nk PC Seawolf Vessel ran aground. *EK/160 22/11/2016 Port of Medway 51.4019 0.5047 Oil Diesel Nk Nk Pleasure craft Vessel sank on moorings. *EK/162 24/11/2016 East & South Kent Oil Paraffin wax 10 kms Unidentified vessel Clearance operations completed. EK/167 09/12/2016 St Mary's Bay Vegetable Palm oil 10 litres Unidentified vessel Clearance operations completed. EK/188 28/12/2016 51-33N: 01-47E 51.5583 1.7999 Oil Nk Nk Nk MFV Star Bonaire Vessel capsized.

4: SOUTHERN ENGLAND (*Incident not identified by a POLREP) Reference Incident Date Positional Latitude Longitude Category Incident Incident Incident Source Comments description Type Amount Unit SE/189 Jan-Feb 2016 Southern England Oil Paraffin wax 16 kms Unidentified vessel Clearance operations completed. & Kent SE/191 11/01/2016 QHM Portsmouth 50.8078 -1.1308 Oil Fuel 2 litres Pleasure craft Speed boat sank on mooring. *SE/192 12/01/2016 Poole Harbour 50.7077 -1.994 Oil Hydraulic 27 litres HSC Condor Liberation Clean-up completed. *SE/204 03/03/2016 Emsworth 50.8428 -0.9386 Oil Fuel 10 litres Speed boat Vessel sank in tidal pond. SE/208 07/03/2016 QHM Portsmouth 50.8006 -1.1093 Oil Diesel 50 litres HMS Dragon Clean-up completed. *SE/205 16/03/2016 Poole Harbour 50.7077 -1.994 Oil Diesel Nk Nk HSC Condor Liberation Clean-up completed. SE/206 21/03/2016 50-46N: 00-20E 50.7736 0.3342 Oil Diesel Nk Nk PC Just Wandering Vessel caught fire and sank. SE/651 April & May 2016 Southern England Oil Paraffin wax 20 kms Unidentified vessel Clearance operations completed. & Kent SE/650 12/04/2016 QHM Portsmouth 50.7861 -1.1028 Oil Nk Nk Nk MFV La Coquet Vessel sank and later salvaged. SE/220 03/06/2016 QHM Portsmouth 50.7311 -1.1472 Oil Diesel 5 litres PC Sunsail 4015 Vessel ran aground. SE/222 06/06/2016 QHM Portsmouth 50.8091 -1.0987 Oil Avcat 30 litres Warship Clean-up completed. SE/227 08/07/2016 Weymouth Harbour 50.6139 -2.4472 Oil Diesel 32 litres PC Indecision Oil dispersed naturally. SE/229 19/07/2016 Hamble Marina 50.8556 -1.3194 Oil Diesel Nk Nk PC Saga Clean-up completed. SE/233 12/08/2016 Cowes Harbour 50.7772 -1.5483 Oil Diesel 15 litres PC Twin Wakes Vessel sank, clean-up completed. SE/652 25/08/2016 Cowes Harbour 50.7629 -1.2967 Oil Diesel Nk Nk MFV Nelly T Vessel sank on moorings. SE/237 28/08/2016 Sparkes Marina 50.79 -0.9608 Oil Diesel Nk Nk Pleasure craft Sheen dispersed naturally. *SE/239 25/10/2016 50-40N: 00-14W 50.6917 -0.2361 Oil Hydraulic 5 litres Workboat Sheen dispersed naturally. SE/240 04/11/2016 50-36N: 02-41W 50.7375 -2.7764 Oil Diesel Nk Nk MFV Tracey Oil dispersed naturally. SE/241 08/12/2016 QHM Portsmouth 50.8005 -1.1098 Oil Fuel 25 litres Warship Clean-up completed.

5: SOUTH-WEST ENGLAND (*Incident not identified by a POLREP) Reference Incident Positional Latitude Longitude Category Incident Incident Incident Source Comments Date Description Type Amount Unit SW/274 06/01/2016 Constantine & Vegetable Palm oil Nk Nk Unidentified vessel Clearance operations completed. Trevose Bays *SW/277 01/03/2016 Newlyn Harbour 50.1 -5.5333 Animal Fish oil 5 litres MFV Zilvermeaw Oil dispersed naturally. SW/278 10/03/2016 Dartmouth Harbour 50.4889 -3.5833 Oil Diesel 2 tonnes MFV St.Christophie 1 Vessel capsized and sank. *SW/279 10/03/2016 QHM Plymouth 50.3933 -4.1891 Oil Diesel 227 litres Barge Clean-up completed. SW/282 28/03/2016 Tor Bay Harbour 50.4194 -3.5161 Oil Diesel 150 litres HMS Echo Sheen dispersed naturally. SW/284 12/04/2016 Sutton Harbour 50.3696 -4.1327 Oil Diesel 25 litres Pleasure craft Clean-up completed. SW/285 17/04/2016 50-28N: 03-10W 50.4761 -3.1739 Oil Diesel Nk Nk MFV Elizabeth 2 Oil dispersed naturally. SW/654 09/05/2016 QHM Plymouth 50.3887 -4.197 Oil Diesel Nk Nk Mooring barge Vessel capsized, clean-up completed. *SW/289 09/05/2016 Port of Truro 50.26 -5.0472 Oil Diesel Nk Nk Pleasure craft Clean-up completed. *SW/294 11/07/2016 Fowey Harbour 50.3389 -4.6375 Oil Lubrication 2 litres Pleasure craft Clean-up completed. SW/297 10/08/2016 50-49N: 04-35W 50.8256 -4.8214 Oil Petrol Nk Nk MFV San Maria 2 Vessel caught fire and sank.

6: BRISTOL CHANNEL AND SOUTH WALES (*Incident not identified by a POLREP) Reference Incident Positional Description Latitude Longitude Category Incident Type Incident Incident Unit Source Comments Date Amount *BC/335 12/05/2016 Fishguard beaches 52.0042 -4.9931 Vegetable Palm oil 1 cubic metre Unidentified vessel Clearance operations completed. *BC/337 15/05/2016 Portishead Quay Marina 51.4894 -2.7596 Oil Diesel 40 square metres Pleasure craft Clean-up completed. BC/339 17/08/2016 Fishguard Harbour 52.0067 -4.9761 Oil Lubrication 1 litre MFV Marianne Clean-up completed. BC/343 05/10/2016 The Mumbles 51.5758 -3.9903 Oil Petrol Nk Nk Pleasure craft Oil dispersed naturally. BC/347 13/12/2016 Port of Pembroke 51.7078 -4.9617 Oil Oily bilge water 10 litres MTUG Svitzer Caldey Clean-up completed.

7: IRISH SEA (*Incident not identified by a POLREP) Reference Incident Positional Latitude Longitude Category Incident Type Incident Incident Source Comments Date Description Amount Unit *IS/365 04/01/2016 54.1089 -3.2437 Oil Diesel 100 litres MFV Talisker Oil dispersed naturally. IS/326 17/01/2016 53.3135 -4.62052 Oil Diesel 50 litres HSC Codrington Arrow Clean-up completed. IS/366 25/01/2016 Port of Liverpool 53.4269 -3.0256 Vegetable Rapeseed oil 1 tonne MV The Crosby Clean-up completed. *IS/371 02/02/2016 Portstewart Harbour 55.1874 -6.7207 Oil Diesel 600 litres Pilot boat Challenger Vessel sank on mooring. IS/373 11/02/2016 Aberystwyth Harbour 52.4 -4.0833 Oil Oily bilge water Nk Nk Fishing vessel Sheen dispersed naturally. IS/374 14/02/2016 Silloth Docks 54.8686 -3.4003 Oil Diesel 40 litres MFV Noordzee Clean-up completed. *IS/376 16/02/2016 Port of Workington 54.6514 -3.575 Oil Diesel 30 litres MDREDGER Grete Fighter Oil dispersed naturally. *IS/413 18/03/2016 Port of Liverpool 53.4035 -3.0468 Oil Fuel 2 litres HMS Bronington Vessel sank, clean-up completed. *IS/462 18/05/2016 Port of Barrow 54.1089 -3.2314 Oil Diesel 0.5 litres MFV Tasker Oil dispersed naturally. *IS/387 08/06/2016 Ellesmere Port 53.2866 -2.8638 Oil Diesel 205 litres MV Doris T Bunkering spill, clean-up completed. IS/390 12/06/2016 54-29N: 03-40W 54.4872 -3.6778 Oil Diesel Nk Nk Unidentified vessel Oil dispersed naturally. IS/463 10/07/2016 Eastham Docks 53.33 -2.9517 Oil Lubrication Nk Nk Ferry Royal Iris Oil dispersed naturally. IS/395 14/07/2016 53-19N: 04-72W 53.3225 -4.0367 Oil Lubrication Nk Nk PC La Babe Vessel ran aground and sank. IS/399 29/07/2016 53-55N: 02-59W 53.9217 -3.0089 Oil Diesel 20 litres PC Whisper Vessel heeled over on drying mooring. *IS/401 01/08/2016 Cemaes Bay 53.4162 -4.4869 Oil Hydraulic 0.05 litres Survey vessel Fugro Sheen dispersed naturally. IS/404 04/08/2016 53.3525 -2.7391 Oil Diesel 25 litres PC Riprap Oil dispersed naturally. IS/405 23/08/2016 Port of Liverpool 53.4353 -3.0083 Vegetable Palm oil 3 tonnes MT Stenaweco C. Corrado Clean-up completed. IS/408 27/08/2016 53-28N: 03-19W 53.4781 -3.3283 Oil Hydraulic 2 litres Rov from MV Zwerver 2 Oil dispersed naturally. IS/412 10/09/2016 Port of Liverpool 53.4051 -2.9994 Oil Fuel Nk Nk Unidentified vessel Sheen dispersed naturally. IS/415 10/09/2016 53-29N: 03-18W 53.4833 -3.3 Oil Lubrication 0.25 litres Willem De Vlamingh Sheen dispersed naturally. IS/417 11/09/2016 Portaferry 54.3804 -5.5492 Oil Petrol 60 litres PC Sunrise Pollution evaporated. *IS/423 22/09/2016 Port of Liverpool 53.4333 -3.0014 Oil Gas 5 litres MTUG Smit Waterloo Bunkering spill, clean-up completed. IS/428 11/10/2016 53-20N: 03-27W 53.3544 -3.4706 Oil Hydraulic 0.5 litres Rov from MV Zwerver 2 Oil dispersed naturally. IS/430 19/10/2016 Port of Liverpool 53.4064 -2.9989 Oil Petrol Nk Nk Pleasure craft Vessel capsized.

8: WESTERN SCOTLAND (*Incident not identified by a POLREP) Reference Incident Positional description Latitude Longitude Category Incident Type Incident Incident Source Comments Date Amount Unit *WS/464 04/01/2016 Kinlochbervie Harbour 58.4574 -5.0507 Oil Diesel 50 litres Fishing vessel Clean-up completed. *WS/537 14/02/2016 Kyleakin Harbour 57.2729 -5.7249 Oil Oily water Nk Nk Unidentified vessel Suspected bilge pump-out. *WS/473 27/02/2016 Kinlochbervie Harbour 58.4574 -5.0507 Oil Diesel 200 litres MFV Endeavour Bunkering spill, clean-up completed. *WS/474 28/03/2016 Ardrossan Harbour 55.6413 -4.8217 Oil Nk 3 litres Fishing vessel Clean-up completed. WS/476 09/04/2016 56-49N: 07-37W 56.8203 -7.6278 Oil Diesel Nk Nk MFV Louisa Vessel sank, oil dispersed naturally. WS/480 30/04/2016 Mallaig Harbour 57.0064 -5.8275 Oil Diesel Nk Nk MFV Alex C Vessel sank, clean-up completed. *WS/483 29/06/2016 Glensanda Terminal 56.5681 -5.5321 Oil Diesel 5 litres MV Yeoman Bridge Split hose, oil dispersed naturally. WS/394 10/07/2016 Kennacraig Ferry 58.8111 -5.4833 Oil Hydraulic 5 litres Ro-Ro Finlaggan Ruptured hose line. Terminal *WS/486 03/08/2016 Campeltown Harbour 55.4248 -5.6028 Oil Lubrication 25 litres MFV Perseverance Vessel sank, clean-up completed. WS/487 08/08/2016 Dalmore Beach 58.315 -6.7733 Oil Diesel 50 tonnes RIG Transocean Winner Oil dispersed naturally. WS/490 18/08/2016 Crinin Canal Basin 56.0908 -5.5564 Oil Diesel Nk Nk Pleasure craft Clean-up completed. *WS/491 23/08/2016 Greenock 55.9431 -4.7262 Oil Oily bilge water Nk Nk PC My Island Fox Clean-up completed. WS/492 23/08/2016 58-27N: 06-48W 58.4539 -6.8044 Oil Nk Nk Nk Unidentified vessel Sheen dispersed naturally. *WS/493 24/08/2016 Greenock 55.9431 -4.7262 Oil Diesel Nk Nk PC Spirit of Kenbane Vessel sank in dock. WS/494 01/09/2016 Lochinver Harbour 58.1333 -5.2333 Oil Diesel 40 litres MFV GV Gleaner CN77 Bunkering spill, clean-up completed. WS/659 04/09/2016 57.01N: 05-44W 57.0169 -5.7361 Oil Engine oil 25 litres Fishing vessel Vessel ran aground and sank. *WS/497 12/09/2016 Lochinver Harbour 58.1333 -5.2333 Oil Gas 200 litres MFV Jean Claude Overflow onboard fuel Coulon II transfer. WS/500 25/09/2016 Lochmaddy Harbour 57.6036 -7.1611 Oil Lubrication 200 litres Ro-Ro MV Hebrides Vessel ran aground. *WS/501 29/09/2016 Kirkudbright Harbour 54.8385 -4.051 Oil Diesel 1 litres Fishing vessel Clean-up completed. WS/502 06/10/2016 58-17N: 06-12W 58.2919 -6.2061 Oil Diesel Nk Nk RIG Transocean Winner Clean-up completed. WS/503 12/10/2016 58-18N: 06-49W 58.295 -6.8147 Oil Diesel Nk Nk MFV An Cuantach Vessel sank, oil dispersed naturally. *WS/506 21/10/2016 Troon Harbour 55..5583 -4.6833 Oil Lubrication 10 litres Fishing vessel Clean-up completed.

WS/507 26/11/2016 Canna Harbour 57.0597 -6.4967 Oil Diesel Nk Nk MFV Contest Leak from cracked fuel tank. WS/510 01/12/2016 Lochinver Harbour 58.1333 -5.2333 Oil Diesel 400 litres MFV Roselend Bunkering spill, clean-up completed. *WS/547 14/12/2016 Greenock 55.9457 -4.722 Oil Diesel 2 litres MTUG Svitzer Milford Bunkering spill, oil dispersed naturally.

9: ORKNEY AND SHETLAND ISLANDS (*Incident not identified by a POLREP) Reference Incident Positional Latitude Longitude Category Incident Incident Incident Source Comments Date Description Type Amount Unit OS/553 21/01/2016 60-45N: 01-17W 60.7083 -1.275 Oil Diesel Nk Nk MFV Majestic Vessel sank, sheen dispersed naturally. *OS/556 14/04/2016 Kirkwall Harbour 58.9889 -2.9556 Oil Diesel 5 litres MFV Adlegrund Seepage from wreck. *OS/557 15/04/2016 Scapa Flow 58.9222 -3.025 Oil Diesel 20 litres Platform Regalia Oil dispersed naturally. OS/558 01/06/2016 58-46N: 04-48W 58.8775 -4.8233 Oil Nk Nk Nk Unidentified vessel Oil dispersed naturally. OS/559 09/06/2016 59-42N: 03-45W 59.7 -3.75 Other Unidentified Nk Nk Unidentified vessel Brown sludge dispersed naturally. OS/561 08/07/2016 59.41N: 01-22W 59..6911 -1.3722 Oil Diesel Nk Nk MFV Hope III Vessel took on water and sank. OS/562 17/07/2016 61-37N: 01-18W 61.62 -1.3069 Oil Fuel 4 litres RSV Caledonian Vision Sheen dispersed naturally. *OS/568 13/10/2016 Scapa Flow 58.9624 -2.9733 Oil Diesel 20 litres Workboat John Jolly Sheen dispersed naturally.

10: EASTERN SCOTLAND (*Incident not identified by a POLREP) Reference Incident Positional description Latitude Longitude Category Incident Incident Incident Source Comments Date Type Amount Unit ES/571 04/01/2016 Gardenstown Harbour 55.2761 -2.4103 Oil Diesel Nk Nk MFV Ruby Vessel sank and later recovered. *ES/574 22/01/2016 Firth of Forth 56.0049 -3.3908 Oil Oily water Nk Nk Barge Neptune Sheen dispersed naturally. *ES/575 06/02/2016 Methil, Firth of Forth 56.1848 -3.0037 Oil Diesel Nk Nk Creel boat Vessel sank, oil dispersed naturally. ES/577 11/02/2016 Aberdeen Harbour 57.1439 -2.0842 Oil Lubrication 10 litres MSV Highland Oil dispersed naturally. Prestige ES/582 01/03/2016 Buckie Harbour 57.6897 -2.9586 Oil Oily water Nk Nk MFV Jasper Bilge discharge, clean-up completed. ES/584 14/04/2016 57-53N: 02-24W 57.8972 -2.4194 Oil Hydraulic Nk Nk MT Aberdeen Slight sheen dispersed naturally. ES/477 26/04/2016 Sutherland/Caithness Oil Weathered Nk Nk Unidentified vessel Clearance operation completed. beaches *ES/587 03/05/2016 Aberdeen Harbour 57.146 -2.0923 Oil Hydraulic 2 litres MSV Vos Prospector Oil dispersed naturally. ES/589 18/05/2016 57-42N: 02-07W 57.7 -2.1167 Oil Diesel 10 litres PC Opportune Vessel ran aground. ES/595 23/06/2016 Burghead Harbour 57.703 -3.5094 Oil Diesel 20 litres MFV Pegasus Clean-up completed. ES/597 24/06/2016 Newhaven Harbour 55.9917 -3.2047 Oil Hydraulic 0.25 litres Workboat Clean-up completed. *ES/604 21/07/2016 Hopeman Harbour 57.7112 -3.4377 Oil Diesel 1 litres Pleasure craft Clean-up completed. ES/485 26/07/2016 Port Edgar Marina 55.9954 -3.4112 Oil Diesel 0.5 litres PC Seamist Refuelling spill, oil dispersed naturally. ES/714 11/08/2016 58.18N: 01-42W 58.3 -1.7 Oil Nk 50 litres Unidentified vessel Reported by Blackford Dolphin installation. *ES/609 06/09/2016 Aberdeen Harbour 57.1424 -2.0877 Oil Gas 10 litres MTUG Hemiksem Tank overflow, oil dispersed naturally. ES/610 15/09/2016 Firth of Forth 56 -3.2 Oil Hydraulic 180 litres MTUG Seal Carr Oil dispersed naturally. *ES/612 25/09/2016 Peterhead Port 57.4931 -1.785 Oil Diesel 100 litres MSV Brage Supplier Bunkering spill, clean-up completed. *ES/613 28/09/2016 Aberdeen Harbour 57.146 -2.0923 Oil Hydraulic 5 litres MSV Vos Enterprise Oil dispersed naturally. ES/638 04/10/2016 Nigg Energy Park 57.7028 -4.0333 Oil Diesel 50 litres Floating plant Refuelling spill, oil dispersed naturally. ES/617 08/10/2016 Invergordon 57.6889 -4.1417 Oil Lubrication 1 litres MSV Deep Energy Oil dispersed naturally. *ES/619 05/12/2016 Cromarty Firth 57.6833 -4.1667 Oil Diesel 10 litres MTUG Tuacher O Oil dispersed naturally. Wulf ES/620 10/12/2016 Port of Dundee 56.4712 -2.9569 Oil Hydraulic Nk Nk MSV Seawell Clean-up completed. ES/621 11/12/2016 Invergordon 57.6889 -4.1694 Oil Gas 500 litres Workboats Bustler & Both vessels sank, clean-up Teal completed.

11: UKCS OIL AND GAS INSTALLATION RELEASES Reference Incident Position Latitude Longitude Category Source Incident Type Incident Incident Comments Date (Dec) (Dec) Amount Units UKCS/1200 01/01/2016 61-29N: 01-27E 61.48 1.45 Chemical Don SW&W Don Castrol Transaqua HT2 2000 kg Hydraulics - Open Northern Producer System - SCM Failure (Otherwise unspecified) UKCS/1201 05/01/2016 58-06N: 00-41E 58.10 0.68 Oil Blackford Dolphin Fuel Oil 0.14 tonnes Bunkering Hose - Hose Parted from Coupling / Break Away Coupling UKCS/1202 06/01/2016 60-57N: 00-56E 60.95 0.93 Oil Heather A Platform Diesel 0.001 tonnes Diesel Bunkering Hose - Total Rupture UKCS/1203 09/01/2016 57-57N: 00-54W 57.95 -0.90 Oil Golden Eagle PUQ Diesel 0.00086 tonnes Diesel Bunkering Hose Platform - Pinhole Leak UKCS/1204 09/01/2016 60-51N: 01-28E 60.85 1.47 Chemical Ninian Central Platform CRW85733 0.4 kg Vessels (Not Storage) - Over Filled UKCS/1205 10/01/2016 57-04N: 02-04E 57.07 2.07 Chemical Byford Dolphin STACK-MAGIC ECO-F 0.2 kg BOP (Subsea) - V2 Hydraulic Fitting UKCS/1206 11/01/2016 53-50N: 00-26W 53.83 -0.43 Oil Rough BD Platform Oily Waste 0.000563 tonnes Drains System - Overflow of Vessel UKCS/1207 11/01/2016 61-16N: 00-55E 61.27 0.92 Chemical Tern Platform XC85293 164.7 kg Loss from subsea biocide line UKCS/1208 12/01/2016 60-37N: 01-39E 60.62 1.65 Chemical Dunbar Platform DF1 0.002415 kg Hole in bunkering hose UKCS/1209 12/01/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Oily Waste 0.000262 tonnes Pipework - Release Platform From Joint UKCS/1210 13/01/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Diesel 0.0087 tonnes Diesel Systems - Platform Spilled Whilst Filling UKCS/1216 16/01/2016 53-16N: 02-24E 53.27 2.40 Chemical Bessemer North West Castrol Transaqua HT2 582.4 kg Hydraulic Bell subsea completion Manifold/Control Panel - Small Bore Fittings UKCS/1271 17/01/2016 60-54N: 01-25E 60.90 1.42 Oil Ninian Northern Crude 0.000428 tonnes Pipework - Pinhole Platform Leak UKCS/1211 18/01/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Hydraulic 0.21875 tonnes Transfer Hose (Not Platform Bunkering) - Pinhole Leak

UKCS/1212 18/01/2016 57-22N: 01-22E 57.37 1.37 Oil Arbroath Platform Diesel 0.0082 tonnes Vessels (Not Storage) - Drain Line Open UKCS/1213 18/01/2016 57-54N: 00-35W 57.90 -0.58 Oil Ettrick FPSO Aoka Mizu Hydraulic 0.0001 tonnes Cranes - Hydraulic System UKCS/1214 18/01/2016 54-36N: 02-11E 54.60 2.18 Oil Ensco 80 Diesel 0.0006523 tonnes Diesel Bunkering Hose - Hose Parted from Coupling / Break Away Coupling UKCS/1215 18/01/2016 61-37N: 01-18E 61.62 1.30 Chemical Paul B Lloyd Jnr Oceanic HW443ND 10.7 kg Subsea Hydraulics - Small Bore Fittings UKCS/1217 19/01/2016 61-06N: 01-04E 61.10 1.07 Oil Cormorant A Platform Diesel 0.0009 tonnes Diesel Bunkering Hose - Pinhole Leak UKCS/1218 20/01/2016 54-02N: 00-43E 54.03 0.72 Oil Cleeton CPQ Platform Lubrication 0.0000001 tonnes Entrained Oil - Utility 6 System UKCS/1219 22/01/2016 53-50N: 03-34W 53.83 -3.57 Oil Morecambe South DP4 Hydraulic 0.14 tonnes Hydraulics - Closed Platform system - Valve Failure UKCS/1228 22/01/2016 61-21N: 01-34E 61.35 1.57 Chemical Thistle A Platform Sodium Hypochlorite 14- 2 kg Temporary Equipment 16% - Pipework Failure UKCS/1220 24/01/2016 57-43N: 00-50E 57.72 0.83 Oil Forties FC Platform Hydraulic 0.03 tonnes Hydraulic Fluid - Tank Overflow UKCS/1221 24/01/2016 61-21N: 01-34E 61.35 1.57 Oil Thistle A Platform Crude 0.002 tonnes Wellheads - Release From Joint UKCS/1222 25/01/2016 61-03N: 01-42E 61.05 1.70 Chemical Brent B Platform Caustic Soda; Proxel 14.285 kg Mud Pump - XL2; DUO-VIS; M-I Equipment Failure BAR (All Grades); POLYPAC - All Grades UKCS/1223 26/01/2016 57-10N: 00-41E 57.17 0.68 Chemical Guillemot Westermn Castrol Brayco Micronic 45.6 kg Subsea Hydraulics - Extension DC3 manifold SV/3 Valve Failure UKCS/1224 26/01/2016 57-17N: 01-39E 57.28 1.65 Chemical Marnock ETAP PDR EC1426A 5 kg Chemical Injection - Platform Small Bore Fittings UKCS/1225 26/01/2016 56-27N: 02-17E 56.45 2.28 Oil Clyde Platform Crude 0.703 tonnes Pipework - Pinhole Leak UKCS/1226 26/01/2016 59-21N: 01-33E 59.35 1.55 Chemical Gryphon A Production Oceanic HW540 E 212 kg Hydraulics - Closed Vessel system - Valve Failure UKCS/1227 27/01/2016 61-05N: 01-43E 61.08 1.72 Oil Brent C Platform Crude 0.01235 tonnes Unknown Source

UKCS/1229 29/01/2016 60-37N: 01-40E 60.62 1.67 Chemical Dunbar Platform Baracarb (all grades); EZ 1.3726 kg Transfer Hose (Not MUL NT; TAU-MOD; Bunkering) - Hose ADAPTA; LIME; Parted from Coupling / RHEMOD L; Barite 4, 1 Break Away Coupling D31; CMO 568; Calcium Chloride Powder UKCS/1230 29/01/2016 56-23N: 02-15E 56.38 2.25 Chemical Janice A FPU Castrol Transaqua HT2 9730 kg Subsea leak from the Affleck manifold UKCS/1231 01/02/2016 61-06N: 01-04E 61.10 1.07 Oil Cormorant A Platform Hydraulic 0.06 tonnes Hydraulics - Closed system - Umbilical Rupture UKCS/1232 01/02/2016 57-17N: 01-39E 57.28 1.65 Chemical Marnock ETAP QU Sodium Hypochlorite 5- 1 kg Storage Tanks etc. - Platform 15% Bund Overflow / Open UKCS/1234 02/02/2016 58-13N: 01-06E 58.22 1.10 Oil Balmoral FPV Crude 0.000008 tonnes Pipework - Pinhole Leak UKCS/1233 03/02/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Hydraulic 0.001 tonnes Bursting Disc/PSV - Platform Failure UKCS/1235 04/02/2016 53-19N: 02-34E 53.32 2.57 Oil Inde AC Platform Diesel 0.005 tonnes Diesel Bunkering Hose (PERENCO) - Pinhole Leak UKCS/1902 06/02/2016 59-53N: 01-12E 59.88 1.20 Oil Transocean Leader Hydraulic 0.0072 tonnes ROV-Subsea Release Platform UKCS/1236 07/02/2016 58-06N: 00-41E 58.10 0.68 Chemical Blackford Dolphin STACK-MAGIC ECO-F 760.3 kg BOP (Subsea) - BOP V2; MONOTHYLEN Accumulator GLYCOL UKCS/1237 08/02/2016 60-18N: 04-16W 60.30 -4.27 Chemical Foinaven - FPSO Oceanic HW540 v2 16790 kg Hydraulics - Open Petrojarl System - SCM Failure (Otherwise unspecified) UKCS/1238 08/02/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Hydraulic 0.005 tonnes Pipework - Small Bore Platform Fittings UKCS/1239 08/02/2016 60-19N: 04-06W 60.32 -4.10 Chemical Deepsea Aberdeen Mono Ethylene Glycol; 4.16 kg BOP (Subsea) - Erifon HD603HP (No Hydraulic Fitting Dye) UKCS/1240 09/02/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 22.5 kg Conductor Tensioner - Seal Failure

UKCS/1283 10/02/2016 57-01N: 01-57E 57.02 1.95 Chemical Shearwater C PUQ CRW85733 81.38 kg Entrained Chemicals - Platform Utility System UKCS/1241 11/02/2016 58-13N: 01-06E 58.22 1.10 Chemical Balmoral FPV Pelagic 100 Production 585.9 kg Hydraulics - Open Control Fluid System - Solenoid Failure UKCS/1242 11/02/2016 53-41N: 02-37E 53.68 2.62 Oil Cutter QC Condensate 0.017 tonnes Wellheads - Release From Joint UKCS/1248 11/02/2016 61-16N: 00-55E 61.27 0.92 Chemical Tern Platform Gyptron® SA3500 1363 kg Storage Tanks etc. - Drain Line Open UKCS/1243 12/02/2016 53-40N: 03-32W 53.67 -3.53 Chemical Douglas FPSO OSB Oceanic HW540 E 41.76 kg Hydraulics - Open System - Umbilical Rupture UKCS/1245 13/02/2016 61-06N: 01-44E 61.10 1.73 Oil Brent D Platform Diesel 0.0054 tonnes Diesel Storage Tank - Overfilled UKCS/1246 13/02/2016 58-41N: 01-16E 58.68 1.27 Oil Brae A Platform Diesel 0.00043 tonnes Diesel Systems - Failure of Equipment UKCS/1244 14/02/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 10 kg Conductor Tensioner - Seal Failure UKCS/1247 15/02/2016 53-40N: 03-32W 53.67 -3.53 Chemical Douglas FPSO OSB Oceanic HW540 E 1 kg Hydraulics - Open System - Accumulator Failure UKCS/1249 16/02/2016 57-11N: 00-59E 57.18 0.98 Chemical Gannet A Platform TEG (all grades); 11252.19 kg Fixed Chemical EC1188A Pipework (Utility Chemicals) - Release From Joint UKCS/1250 17/02/2016 57-01N: 01-57E 57.02 1.95 Oil Shearwater A Wellhead Condensate 0.009 tonnes Temporary Equipment Platform - Release During Operation UKCS/1251 18/02/2016 58-27N: 00-15E 58.45 0.25 Oil Piper B Platform Diesel 0.003 tonnes Diesel Bunkering Hose - Hose Parted from Coupling / Break Away Coupling UKCS/1252 19/02/2016 53-37N: 03-10W 53.62 -3.17 Chemical Lennox Platform Oceanic HW540 E 100 kg Actuator - Seal Failure UKCS/1253 19/02/2016 58-13N: 01-06E 58.22 1.10 Chemical Balmoral FPV Pelagic 100 Production 615.16 kg Hydraulics - Open Control Fluid System - Solenoid

Failure UKCS/1254 19/02/2016 58-06N: 00-41E 58.10 0.68 Chemical Blackford Dolphin STACK-MAGIC ECO-F 21.9 kg BOP (Subsea) - V2; MONOTHYLEN Hydraulic Fitting GLYCOL UKCS/1255 20/02/2016 61-16N: 01-35E 61.27 1.58 Oil Dunlin A Platform Diesel 0.1 tonnes Diesel Systems - Pinhole Leak UKCS/1262 21/02/2016 58-06N: 00-41E 58.10 0.68 Chemical Alder Castrol Transaqua HT2 449.82 kg Hydraulics - Closed system - Umbilical Rupture UKCS/1256 22/02/2016 57-22N: 01-59E 57.37 1.98 Chemical Ensco 101 Citric Acid; FLO-TROL; 4659.3 kg Pit Valves - Opened FLO-VIS PLUS; MAGNESIUM OXIDE; M-I WATE (All Grades); POLYPAC - All Grades; PTS 200; SAFE-CIDE; Soda Ash; Sodium Chloride Brine UKCS/1257 22/02/2016 57-01N: 01-57E 57.02 1.95 Chemical Shearwater C PUQ Biolube 5 kg Annulus - Over Filled Platform UKCS/1258 22/02/2016 60-19N: 04-06W 60.32 -4.10 Chemical Deepsea Aberdeen Erifon HD603HP (No 130.69 kg Hose (Topsides, Not Dye); Bunkering) - Hose MONOETHYLENE Parted from Coupling / GLYCOL Break Away Coupling UKCS/1259 22/02/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Hydraulic 0.0004425 tonnes Cranes - Hydraulic Platform System UKCS/1260 23/02/2016 57-58N: 01-14E 57.97 1.23 Chemical Chestnut Sevan Triethylene Glycol, TEG; 34.58 kg Entrained Chemicals - Hummingbird CRW85733 Utility System UKCS/1261 24/02/2016 58-28N: 00-15W 58.47 -0.25 Chemical Claymore North Subsea OSW85797; XC85293 6.1 kg Subsea Chemical Template Systems - Fittings / Connections UKCS/1263 26/02/2016 58-21N: 00-52E 58.35 0.87 Oil Donan FPSO Global Oily Waste 0.0000149 tonnes Drains System - Producer III Pipework Failure UKCS/1914 27/02/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Oily Waste 0.00984 tonnes PWRI Pipework - Platform Release During Maintenance

UKCS/1264 27/02/2016 56-41N: 02-20E 56.68 2.33 Oil Judy Platform Diesel 0.0000105 tonnes Valves - Gland / 6 Packing Failure UKCS/1266 28/02/2016 56-24N: 02-03E 56.40 2.05 Oil Auk A Platform Diesel 0.0044 tonnes Diesel Bunkering Hose - Pinhole Leak UKCS/1267 01/03/2016 60-03N: 03-58W 60.05 -3.97 Oil Solan Platform Diesel 0.00011 tonnes Spill - During Manual Operations UKCS/1268 02/03/2016 61-02N: 01-07E 61.03 1.12 Oil Cormorant A Platform Hydraulic 0.068 tonnes Hydraulics - Closed system - Umbilical Rupture UKCS/1269 02/03/2016 61-03N: 01-42E 61.05 1.70 Oil Brent B Platform Unknown 0.00144 tonnes Sheen Observed - Unknown Source UKCS/1270 02/03/2016 53-05N: 02-07E 53.08 2.12 Oil Leman AK Platform Diesel 0.008 tonnes Diesel Systems - [SHELL] Pinhole Leak UKCS/1272 03/03/2016 58-25N: 00-20E 58.42 0.33 Chemical Saltire A Platform Pelagic 100 Production 0.9 kg Hydraulic Control Fluid Manifold/Control Panel - Small Bore Fittings UKCS/1273 04/03/2016 53-27N: 01-43E 53.45 1.72 Oil Clipper PR Platform Condensate 0.00036 tonnes Drains System - Overflow of Vessel UKCS/1274 05/03/2016 58-02N: 01-08E 58.03 1.13 Chemical Britannia Platform Transaqua HT2 1371 kg Hydraulics - Open System - SCM Failure (Otherwise unspecified) UKCS/1275 06/03/2016 61-14N: 01-08E 61.23 1.13 Oil Cormorant North Crude 0.24976 tonnes Drains System - Platform Pipework Failure UKCS/1276 06/03/2016 53-53N: 00-26E 53.88 0.43 Oil Paragon B391 Condensate 0.0014 tonnes Well Test - Flare Drop Out UKCS/1277 08/03/2016 54-03N: 01-02E 54.05 1.03 Oil Ravenspurn North ST2 Hydraulic 0.005 tonnes SSSV - Valve Failure Platform UKCS/1278 09/03/2016 53-26N: 02-19E 53.43 2.32 Oil Viking BA Platform Diesel 0.0003 tonnes Diesel Systems - Spilled Whilst Filling UKCS/1279 09/03/2016 57-22N: 01-59E 57.37 1.98 Chemical Ensco 101 Castrol Anvol CF 22 450 kg Bop (Topsides) - Hydraulic System UKCS/1281 09/03/2016 57-39N: 01-08E 57.65 1.13 Oil Nelson Platform Kerosene 0.00081 tonnes Helifuel - Pipework Failure UKCS/1280 10/03/2016 57-00N: 01-50E 57.00 1.83 Oil GSF Galaxy I Hydraulic 0.004 tonnes Cranes - Hydraulic

System UKCS/1282 10/03/2016 61-07N: 01-44E 61.12 1.73 Oil Brent D Platform Diesel 0.001 tonnes Diesel Bunkering Hose - Hose Parted from Coupling / Break Away Coupling UKCS/1310 10/03/2016 57-10N: 00-49E 57.17 0.82 Chemical Anasuria FPSO Castrol Brayco Micronic 102.51 kg Leak from Injection SV/3 Wing Valve UKCS/1285 12/03/2016 60-03N: 03-58W 60.05 -3.97 Oil Solan Platform Hydraulic 0.001 tonnes Valves - Valve Failure UKCS/1286 12/03/2016 57-04N: 00-53E 57.07 0.88 Chemical Guillemot West(Triton) Brayco micronic SV3 247.83 kg Hydraulics - Closed FPSO system - Umbilical Rupture UKCS/1287 13/03/2016 56-29N: 02-09E 56.48 2.15 Oil Fulmar A Platform Crude 0.246 tonnes Drains System - Overflow of Deck Drains UKCS/1288 13/03/2016 58-13N: 01-06E 58.22 1.10 Oil Balmoral FPV Crude 0.0084 tonnes Subsea Pipelines - Pipework Failure UKCS/1284 14/03/2016 60-03N: 03-58W 60.05 -3.97 Oil Solan Platform Diesel 0.0825 tonnes Storage (Hydraulic Oils, Lube Oils) - Over Filled UKCS/1289 14/03/2016 58-13N: 01-06E 58.22 1.10 Oil Balmoral FPV Diesel 0.0012 tonnes Spill - During Manual Operations UKCS/1290 17/03/2016 57-28N: 00-30E 57.47 0.50 Oil Kittiwake A Platform Crude 0.243 tonnes Sheen Observed - Unknown Source UKCS/1291 18/03/2016 58-06N: 03-05W 58.10 -3.08 Oil Beatrice AD Platform Diesel 0.0001068 tonnes Transfer Hose (Not 5 Bunkering) - Open to Environment UKCS/1292 18/03/2016 61-14N: 01-22E 61.23 1.37 Chemical Fionn Subsea Tieback Castrol Transaqua HT2 75 kg Hydraulics - Open System - Solenoid Failure UKCS/1293 18/03/2016 57-27N: 01-23E 57.45 1.38 Oil Montrose A Platform Diesel 0.1845 tonnes Cranes - Diesel System UKCS/1294 19/03/2016 57-45N: 01-48E 57.75 1.80 Oil Everest North Platform Diesel 0.00844 tonnes Diesel Bunkering Hose - Total Rupture UKCS/1295 19/03/2016 58-25N: 00-19W 58.42 -0.32 Chemical Claymore A Platform Pelagic 100 Production 187.3 kg Hydraulics - Open Control Fluid System - SCM Failure (Otherwise

unspecified) UKCS/1296 19/03/2016 60-48N: 01-44E 60.80 1.73 Chemical Alwyn North NAA DF1 0.1 kg Bunkering Hose - Platform Release during Change Out UKCS/1297 20/03/2016 61-29N: 01-28E 61.48 1.47 Oil Don SW&W Don Diesel 0.002 tonnes Drains System - Northern Producer Overflow of Vessel UKCS/1298 20/03/2016 54-02N: 00-43E 54.03 0.72 Oil Ravenspurn South C Hydraulic 0.0000000 tonnes Hydraulic Platform 6 Manifold/Control Panel - Small Bore Fittings UKCS/1299 21/03/2016 56-29N: 02-09E 56.48 2.15 Oil Fulmar A Platform Crude 0.00082 tonnes Drains System - Overflow of Deck Drains UKCS/1300 21/03/2016 58-06N: 00-41E 58.10 0.68 Chemical Blackford Dolphin STACK MAGIC ECO 247.74 kg Slip Joint - Lower v2; MONOETHYLENE Packer Failure GLYCOL UKCS/1301 21/03/2016 61-39N: 01-21E 61.65 1.35 Chemical Paul B Lloyd Jnr Oceanic HW443ND 2 kg Hydraulics - Open System - Fittings / Connections UKCS/1302 22/03/2016 61-05N: 01-43E 61.08 1.72 Oil Brent C Platform Diesel 0.0000037 tonnes Spill - Deck Washing UKCS/1303 22/03/2016 53-03N: 02-14E 53.05 2.23 Oil Leman AQ Platform Hydraulic 0.00005 tonnes Cranes - Hydraulic [PERENCO] System UKCS/1304 22/03/2016 53-32N: 03-34W 53.53 -3.57 Chemical Douglas DD Platform Monoethylene Glycol 163.9 kg Plate Pack Cooler - (ALL GRADES); Plate Failure EC1389B; Caustic Soda Solution UKCS/1312 22/03/2016 59-32N: 01-32E 59.53 1.53 Oil Beryl A Platform Lubrication 0.0000040 tonnes Turbines, Pumps etc. - 5 Isolation Failure / Passing Valve UKCS/1306 23/03/2016 57-04N: 02-05E 57.07 2.08 Chemical Machar Manifold Oceanic HW 443 211 kg Hydraulics - Open System - Fittings / Connections UKCS/1309 23/03/2016 57-11N: 00-59E 57.18 0.98 Chemical Gannet A Platform EC6157A; Hydrosure 0.012 kg Pigging Equipment - HD-5000 Seal Failure UKCS/1307 24/03/2016 58-17N: 00-12E 58.28 0.20 Chemical Telford Central Manifold Oceanic HW540 E 471.7 kg Hydraulics - Closed

system - Valve Failure UKCS/1308 29/03/2016 60-56N: 02-13W 60.93 -2.22 Oil West Phoenix Hydraulic 0.01 tonnes Hose (Topsides, Not Bunkering) - Hose Parted from Coupling / Break Away Coupling UKCS/1316 30/03/2016 59-53N: 01-12E 59.88 1.20 Oil Transocean Leader Hydraulic 0.0005 tonnes ROV - Subsea Release UKCS/1319 31/03/2016 57-42N: 01-21E 57.70 1.35 Chemical Rowan Gorilla VII Tuned Lite XLE 20 kg Bunkering Hose - Sheared UKCS/1695 01/04/2016 60-18N: 04-16W 60.30 -4.27 Chemical Foinaven DC2 Manifold Oceanic HW540 v2 28916.8 kg Subsea - Upper Master Valve on tree UKCS/1313 02/04/2016 58-26N: 00-15W 58.43 -0.25 Chemical Claymore A Platform XC85293; OSW85797 0.415 kg Fixed Chemical Pipework (Production Chemicals) - Pinhole Leak UKCS/1318 03/04/2016 60-03N: 03-58W 60.05 -3.97 Oil Solan Platform Crude 0.0001 tonnes Entrained Oil - Utility System UKCS/1311 04/04/2016 57-22N: 01-59E 57.37 1.98 Oil Mungo Production Hydraulic 0.0005 tonnes Hydraulic Manifold Manifold/Control Panel - Small Bore Fittings UKCS/1314 04/04/2016 60-48N: 01-44E 60.80 1.73 Oil Alwyn North NAA Diesel 0.001325 tonnes Diesel Systems - Platform Pinhole Leak UKCS/1315 04/04/2016 56-23N: 02-15E 56.38 2.25 Oil Janice A FPU Oily Waste 0.0048 tonnes Spill - Deck Washing UKCS/1317 06/04/2016 60-37N: 01-39E 60.62 1.65 Chemical Dunbar Platform DF1; Baracarb (all 0.482758 kg Hose (Topsides, Not grades); EZ MUL NT; Bunkering) - Hose TAU-MOD; ADAPTA; Parted from Coupling / LIME; RHEMOD L; Break Away Coupling Barite 4, 1 D31; CMO 568; Calcium Chloride Powder UKCS/1320 07/04/2016 60-37N: 01-39E 60.62 1.65 Chemical Dunbar Platform DF1; Baracarb (all 7.456 kg Hose (Topsides, Not grades); EZ MUL NT; Bunkering) - Hose TAU-MOD; ADAPTA; Parted from Coupling / LIME; THEMOD L; Break Away Coupling Barite 4,1 D31; CMO 568; Calcium Chloride

Powder

UKCS/1321 08/04/2016 58-06N: 01-26E 58.10 1.43 Chemical Cyrus Manifold Methanol 19800 kg Subsea Pipelines - Pipework Failure UKCS/1322 11/04/2016 56-46N: 00-46W 56.77 -0.77 Oil Ensco 100 Crude 0.017 tonnes Well Testing - Flare Drop Out UKCS/1323 11/04/2016 58-17N: 00-12E 58.28 0.20 Chemical Scott Subsea Structure B Oceanic HW540E 59.08 kg Hydraulics - Closed system - Fittings / Connections UKCS/1324 11/04/2016 58-18N: 01-46W 58.30 -1.77 Chemical Captain WPP'A' TEG ALL DILUTIONS 23.5 kg Storage Tanks etc. - Over Filled UKCS/1326 12/04/2016 58-02N: 01-24E 58.03 1.40 Chemical Andrew Platform HW443-ND (non dyed) 1 kg Hydraulic Manifold/Control Panel - Small Bore Fittings UKCS/1327 12/04/2016 53-23N: 02-00E 53.38 2.00 Oil LOGGS GGS Production Oily Waste 0.00025 tonnes Drains System - Platform Overflow of Deck Drains UKCS/1328 12/04/2016 53-18N: 02-34E 53.30 2.57 Oil Inde AT Platform Hydraulic 0.005 tonnes Hydraulic (PERENCO) Manifold/Control Panel - Small Bore Fittings UKCS/1329 12/04/2016 61-21N: 01-09E 61.35 1.15 Oil Eider Platform Diesel 0.0072 tonnes Diesel Bunkering Hose - Pinhole Leak UKCS/1330 12/04/2016 53-05N: 02-07E 53.08 2.12 Oil Leman AK Platform Oily Waste 0.00128 tonnes Drains System - [SHELL] Pipework Failure UKCS/1331 14/04/2016 58-18N: 01-44W 58.30 -1.73 Oil Captain FPSO Crude 0.001688 tonnes Drains - Oil to Non- Recoverable UKCS/1332 14/04/2016 58-13N: 01-06E 58.22 1.10 Oil Balmoral FPV Crude 0.00638 tonnes Subsea Pipelines - Pipework Failure UKCS/1334 14/04/2016 58-06N: 00-41E 58.10 0.68 Chemical Blackford Dolphin STACK MAGIC ECO 1 kg Bop (Topsides) - v2; MONOETHYLENE Hydraulic System GLYCOL UKCS/1333 15/04/2016 53-04N: 01-53E 53.07 1.88 Chemical Delilah Subsea Well AQUALINK 300F 300 kg Hydraulics - Open Head VER2 System - SCM Failure (Otherwise unspecified)

UKCS/1335 15/04/2016 60-44N: 02-29W 60.73 -2.48 Oil Clair Ridge Platform Oily Waste 0.0001 tonnes Drainage System - Sheen Due to Overwhelming Recovery Pump UKCS/1336 16/04/2016 57-01N: 01-57E 57.02 1.95 Oil Shearwater C PUQ Lubrication 0.005 tonnes Spill - During Manual Platform Operations UKCS/1337 16/04/2016 61-21N: 01-09E 61.35 1.15 Oil Eider Platform Diesel 0.0177 tonnes Bunkering Hose - Release during Change Out UKCS/1338 17/04/2016 60-37N: 01-39E 60.62 1.65 Oil Dunbar Platform Hydraulic 0.000435 tonnes Hose (Topsides, Not Bunkering) - Hose Failure UKCS/1339 18/04/2016 61-37N: 01-18E 61.62 1.30 Oil Magnus Platform Hydraulic 0.002 tonnes Hydraulic System - Bursting Disc/PSV - Failure UKCS/1340 20/04/2016 56-57N: 01-48E 56.95 1.80 Chemical Rowan Gorilla V WellLife Cement Blend; 40541 kg Fluid Return System - SILICALITE LIQUID; Overflow HALAD-300L NS; CFR- 8L; SA-533; HR-601M; HR-25L; NF-6; Barite 4,1 D31; EZ MUL NT; Baracarb (all grades); Bentone-38; Calcium Chloride Brine; CMO 568; DRILTREAT; DURATONE E; GELTONE II; Invermul NT; LIME; ADAPTA; SUSPENTONE; EDC 99-DW; STEELSEAL UKCS/1341 20/04/2016 53-21N: 02-02E 53.35 2.03 Oil North Valiant 2 SP Hydraulic 0.0004255 tonnes Pipework - Release From Joint UKCS/1342 20/04/2016 56-29N: 02-09E 56.48 2.15 Oil Fulmar A Platform Crude 0.000006 tonnes Wellheads - Annular Communication UKCS/1343 20/04/2016 53-34N: 02-47E 53.57 2.78 Chemical Carrack QA / QE Castrol Transaqua HT2 304.86 kg Hydraulics - Closed

system - Fittings / Connections UKCS/1344 21/04/2016 58-22N: 00-04E 58.37 0.07 Chemical Tartan A Platform Pelagic 100 Production 0.0005 kg Drains - Water Based Control Fluid Chemicals UKCS/1345 21/04/2016 58-14N: 00-10E 58.23 0.17 Chemical Scott South Subsea HW540e 1.06 kg Hydraulics - Closed Structure E system - Fittings / Connections UKCS/1346 22/04/2016 59-21N: 01-34E 59.35 1.57 Chemical Gryphon A Production Ethylene Glycol, MEG; 5050 kg Entrained Chemicals - Vessel RX-9103N Utility System UKCS/1347 22/04/2016 60-18N: 04-16W 60.30 -4.27 Oil Foinaven - FPSO Crude 0.01 tonnes Riser - Hose Parted Petrojarl from Coupling / Break Away Coupling UKCS/1348 22/04/2016 53-50N: 03-34W 53.83 -3.57 Oil Morecambe South CPP1 Diesel 0.03 tonnes Diesel Systems - Platform Spilled Whilst Filling UKCS/1352 23/04/2016 58-02N: 01-08E 58.03 1.13 Chemical Britannia Platform Castrol Transaqua HT2 372 kg Drains - Water Based Chemicals UKCS/1349 24/04/2016 59-44N: 01-40E 59.73 1.67 Oil Bruce PUQ Platform Oily Waste 0.00056 tonnes Spill - Deck Washing UKCS/1350 25/04/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 45 kg Conductor Tensioner - Seal Failure UKCS/1351 25/04/2016 60-56N: 02-13W 60.93 -2.22 Chemical West Phoenix SODIUM CHLORIDE 14762.46 kg Lower Marine Riser BRINE; EDC 99-DW Package - Disconnected UKCS/1457 25/04/2016 57-09N: 02-17E 57.15 2.28 Chemical Pierce Drill Manifold Methanol (all grades) 1490 kg Subsea Chemical Systems - Valve Failure UKCS/1353 26/04/2016 59-21N: 01-34E 59.35 1.57 Chemical Gryphon A Production Ethylene Glycol; RX- 930 kg Fixed Chemical Vessel 9103N Pipework (Utility Chemicals) - Release From Joint UKCS/1354 28/04/2016 60-30N: 01-50E 60.50 1.83 Chemical Dunbar Platform Oceanic HW443 R 2117.88 kg Hydraulics - Open System - Solenoid Failure UKCS/1355 28/04/2016 53-23N: 02-00E 53.38 2.00 Oil LOGGS GGS Production Diesel 0.004266 tonnes Diesel Systems - Platform Failure of Equipment

UKCS/1356 29/04/2016 53-36N: 01-31E 53.60 1.52 Oil Barque PB HYDRAULIC 0.035 tonnes Hydraulics - Closed system - Fittings / Connections UKCS/1357 01/05/2016 57-01N: 01-57E 57.02 1.95 Chemical Shearwater C PUQ SUREMUL EH; M-I 6.55 kg Hose (Topsides, Not Platform WATE (All Grades); Bunkering) - Hose DF1; CALCIUM Parted from Coupling / CHLORIDE (ALL Break Away Coupling GRADES); ULTIDRILL FL; SAFE-CARB (ALL GRADES); Lime; BENTONE 990; Bentone 42; EMI-663; VERSATROL HT; VEN-CHEM 222 UKCS/1359 02/05/2016 58-02N: 01-08E 58.03 1.13 Chemical Britannia Platform MEG (all grades) 1.11 kg Sample Points - Release Whilst Sampling UKCS/1360 02/05/2016 57-57N: 00-11E 57.95 0.18 Chemical Tweedsmuir South Pelagic 100 (H) 1366 kg Hydraulics - Open SSTM Production Control Fluid System - SCM Failure (Otherwise unspecified) UKCS/1361 03/05/2016 60-41N: 02-32W 60.68 -2.53 Oil Clair Phase 1 Platform Oily Waste 0.001 tonnes Drains System - Pipework Failure UKCS/1362 05/05/2016 61-11N: 00-43E 61.18 0.72 Chemical Ocean Guardian STACK-MAGIC ECO-F 0.5 kg Flow Line - Seal V2 Failure UKCS/1363 05/05/2016 53-45N: 01-42E 53.75 1.70 Oil Mimas Platform Diesel 0.000246 tonnes Diesel Bunkering Hose - Open to Environment UKCS/1364 05/05/2016 61-07N: 01-44E 61.12 1.73 Oil Brent D Platform Crude 0.005 tonnes Release from hose removed from a valve block stabbing point UKCS/1365 07/05/2016 59-44N: 01-40E 59.73 1.67 Oil Bruce PUQ Platform Oily Waste 0.00013 tonnes Spill - Deck Washing UKCS/1366 07/05/2016 53-57N: 01-13E 53.95 1.22 Chemical Babbage Platform HW540E 50 kg Hydraulic Manifold/Control Panel - Small Bore Fittings

UKCS/1370 07/05/2016 59-21N: 01-34E 59.35 1.57 Chemical Donan FPSO Global Flexoil® WM-1840-F2 10 kg Fixed Chemical Producer III Pipework (Production Chemicals) - Small Bore Fittings UKCS/1367 08/05/2016 60-37N: 01-39E 60.62 1.65 Oil Dunbar Platform Hydraulic 0.0083324 tonnes Residual oil washed to 8 drains UKCS/1369 08/05/2016 56-46N: 00-42E 56.77 0.70 Chemical Normand Oceanic HD5001 47.5 kg Transfer Hose (Not Bunkering) - Total Rupture UKCS/1368 09/05/2016 60-03N: 03-58W 60.05 -3.97 Oil Solan Platform Oily Waste 0.000035 tonnes Drains System - Overflow of Vessel UKCS/1371 10/05/2016 61-16N: 01-35E 61.27 1.58 Oil Dunlin A Platform Diesel 0.587 tonnes Diesel Systems - Over Filled UKCS/1372 12/05/2016 53-40N: 03-32W 53.67 -3.53 Oil Douglas FPSO OSB Hydraulic Oil Castrol 0.005 tonnes Fire Pump - Small HYSPIN AWH-M15 Bore Fittings UKCS/1373 12/05/2016 60-48N: 01-44E 60.80 1.73 Oil Alwyn North NAA Diesel 0.0001462 tonnes Diesel systems - Platform 5 overflow UKCS/1374 15/05/2016 60-18N: 04-16W 60.30 -4.27 Chemical Foinaven DC2 Manifold Oceanic HW540 v2 1177 kg Hydraulic Manifold/Control Panel - Small Bore Fittings UKCS/1375 15/05/2016 56-41N: 02-20E 56.68 2.33 Oil Judy Platform Diesel 0.000441 tonnes Diesel Bunkering Hose - Sheared UKCS/1376 16/05/2016 60-19N: 04-09W 60.32 -4.15 Oil Paul B Lloyd Jnr Hydraulic 0.000043 tonnes ROV - Subsea Release UKCS/1377 17/05/2016 58-18N: 01-46W 58.30 -1.77 Oil Captain WPP'A' Crude 0.0007621 tonnes Vessels (Not Storage) - Drain Line Open UKCS/1378 17/05/2016 57-42N: 01-20E 57.70 1.33 Oil Rowan Gorilla VII Riser joint connection 0.0002 tonnes Riser Connection - fluid Residual Drips UKCS/1379 18/05/2016 58-13N: 01-06E 58.22 1.10 Oil Balmoral FPV Crude 0.001 tonnes Subsea Pipelines - Pipework Failure UKCS/1380 20/05/2016 60-41N: 02-32W 60.68 -2.53 Chemical Clair Phase 1 Platform Castrol Transaqua HT2 83 kg Transfer Hose (Not Bunkering) - Total Rupture UKCS/1381 20/05/2016 53-16N: 02-24E 53.27 2.40 Chemical Bessemer North West Castrol Transaqua HT2 605 kg Hydraulics - Open Bell completion System - Fittings / Connections

UKCS/1382 20/05/2016 53-49N: 00-28E 53.82 0.47 Oil Rough AD Platform Diesel 0.000001 tonnes Cranes - Diesel System UKCS/1385 21/05/2016 56-46N: 00-42E 56.77 0.70 Chemical Normand Oceanic HD5001 9.6 kg Transfer Hose (Not Bunkering) - Hose Parted from Coupling / Break Away Coupling UKCS/1398 21/05/2016 58-07N: 01-24W 58.12 -1.40 Chemical Ross FPSO Bleo Holm BIOTREAT 4549; RX 101.455 kg Fixed Chemical Sodium Hydroxide; Pipework (Utility NAFLEET ENGINE Chemicals) - Total WATER TREATMENT Rupture 9-108; MONOETHYLENE GLYCOL (all dilutions) UKCS/1383 22/05/2016 57-57N: 01-50E 57.95 1.83 Oil Armada Platform Condensate 0.0087 tonnes Pipework - Pinhole Leak UKCS/1384 23/05/2016 61-07N: 01-44E 61.12 1.73 Oil Brent D Platform Crude 0.0198 tonnes Transfer Hose (Not Bunkering) - Open to Environment UKCS/1386 24/05/2016 60-03N: 03-58W 60.05 -3.97 Oil Solan Platform Diesel 1.938 tonnes Diesel Systems - Failure of Equipment UKCS/1387 25/05/2016 61-21N: 01-09E 61.35 1.15 Oil Eider Platform Crude 0.013 tonnes Pigging - Pipework Failure UKCS/1388 25/05/2016 60-19N: 04-09W 60.32 -4.15 Chemical Paul B Lloyd Jnr Ethylene Glycol 0.027 kg BOP (Subsea) - Hydraulic Fitting UKCS/1389 25/05/2016 60-19N: 04-06W 60.32 -4.10 Chemical Deepsea Aberdeen Erifon HD603HP (No 0.3 kg BOP (Subsea) - Dye) Hydraulic Fitting UKCS/1390 25/05/2016 53-45N: 01-58E 53.75 1.97 Oil Ensco 92 Unknown 0.00879 tonnes Sheen Observed - Unknown Source UKCS/1395 25/05/2016 61-10N: 02-25W 61.17 -2.42 Chemical DeepSea Stavanger Erifon HD603HP (No 60 kg BOP (Subsea) - Dye) Hydraulic Fitting UKCS/1391 26/05/2016 60-48N: 01-27E 60.80 1.45 Oil Ninian Southern Hydraulic 0.00879 tonnes ROV - Subsea Release Platform UKCS/1392 26/05/2016 57-11N: 00-59E 57.18 0.98 Chemical Gannet A Platform TEG (all grades); 192.68 kg Fixed Chemical EC1188A; EC6111E Pipework (Utility Chemicals) - Release From Joint

UKCS/1393 27/05/2016 53-49N: 00-28E 53.82 0.47 Oil Rough AD Platform Hydraulic 0.0000005 tonnes Cranes - Hydraulic 22 System UKCS/1394 27/05/2016 60-19N: 04-09W 60.32 -4.15 Oil Paul B Lloyd Jnr Hydraulic 0.0000129 tonnes Hoses (Subsea) - Hydraulic Hose UKCS/1396 27/05/2016 60-19N: 04-09W 60.32 -4.15 Chemical Paul B Lloyd Jnr Ethylene Glycol 333 kg Hoses (Subsea) - Hydraulic Hose UKCS/1397 28/05/2016 57-44N: 01-50E 57.73 1.83 Chemical Everest North Platform Oil based mud 10.32 kg Well - Small Subsea Release from Well UKCS/1399 01/06/2016 58-02N: 01-08E 58.03 1.13 Oil Britannia Platform Diesel 0.000125 tonnes Diesel Systems - Failure of Equipment UKCS/1400 01/06/2016 60-18N: 04-16W 60.30 -4.27 Oil Foinaven - FPSO Oily Waste 0.006 tonnes Drains System - Petrojarl Overflow of Vessel UKCS/1401 03/06/2016 58-02N: 01-24E 58.03 1.40 Chemical Andrew Platform Sodium Hypochlorite (up 800 kg Chemical Injection - to 15% w/w) Small Bore Fittings UKCS/1403 03/06/2016 53-50N: 00-26W 53.83 -0.43 Oil Rough BD Platform Unknown 0.000278 tonnes Sheen Observed - Unknown Source UKCS/1411 03/06/2016 53-37N: 03-40W 53.62 -3.67 Chemical Conwy Platform WAXTREAT 3673 3.81 kg Chemical Injection - Small Bore Fittings UKCS/1402 04/06/2016 58-06N: 01-26W 58.10 -1.43 Chemical Ross FPSO Bleo Holm Pelagic 100 Production 840 kg Gas Lift Annulas Control Fluid Master Valve - Valve Failure UKCS/1405 05/06/2016 58-18N: 01-46W 58.30 -1.77 Oil Captain WPP'A' Oily Waste 0.0002532 tonnes Valves - Valve Failure UKCS/1406 05/06/2016 61-16N: 00-55E 61.27 0.92 Oil Tern Platform Diesel 0.133 tonnes Diesel Bunkering Hose - Total Rupture UKCS/1407 05/06/2016 57-00N: 01-50E 57.00 1.83 Oil GSF Galaxy I Non-aqueous based mud 0.012 tonnes Gauge line to well - Pipework Failure UKCS/1408 05/06/2016 58-06N: 00-41E 58.10 0.68 Chemical Blackford Dolphin STACK-MAGIC ECO-F 34.6 kg BOP (Subsea) - V2; MONOETHYLEN Hydraulic Fitting GLYCOL UKCS/1409 06/06/2016 56-43N: 01-18E 56.72 1.30 Oil Curlew FPSO Unknown 0.0006715 tonnes Sheen Observed - Unknown Source UKCS/1410 06/06/2016 61-02N: 01-07E 61.03 1.12 Oil Pelican Manifold Hydraulic 0.00635 tonnes Bullnose Umbilical Termination Assesmbly - Coupler Leak

UKCS/1412 06/06/2016 54-26N: 02-28E 54.43 2.47 Oil Tyne Condensate 0.00015 tonnes Transfer Hose (Not Bunkering) - Open to Environment UKCS/1413 06/06/2016 60-19N: 04-09W 60.32 -4.15 Chemical Paul B Lloyd Jnr STACK-MAGIC ECO-F 6 kg BOP (Subsea) - V2 Hydraulic Fitting UKCS/1416 07/06/2016 58-06N: 01-26W 58.10 -1.43 Chemical Ross FPSO Bleo Holm Pelagic 100 Production 1092.4 kg Hydraulics - Open Control Fluid System - Umbilical Rupture UKCS/1414 08/06/2016 53-37N: 03-10W 53.62 -3.17 Oil Lennox Platform Hydraulic 0.001 tonnes Pipework - Small Bore Fittings UKCS/1415 08/06/2016 60-54N: 01-25E 60.90 1.42 Oil Ninian Northern Crude 0.00342 tonnes Pipework - Pinhole Platform Leak UKCS/1418 08/06/2016 57-21N: 01-52E 57.35 1.87 Chemical Byford Dolphin CLAIRSOL 370 143 kg Pipework - Pinhole Leak UKCS/1417 09/06/2016 57-56N: 00-50E 57.93 0.83 Chemical Sedco 704 SCR-100L-UK; 1402.3 kg Drains - Water Based HALAD-300L NS Chemicals UKCS/1419 10/06/2016 57-01N: 01-57E 57.02 1.95 Oil Shearwater C PUQ Oily Waste 0.02 tonnes Drains - System Platform Overpressured UKCS/1420 11/06/2016 61-07N: 01-44E 61.12 1.73 Chemical Brent D Platform Baker Hughes Tretolite 0.5 kg Chemical Injection - Demulsifier DMO80046 Open to Environment UKCS/1421 11/06/2016 54-26N: 02-18E 54.43 2.30 Chemical Munro Methanol 590.3 kg Chemical Injection - Pump Failure UKCS/1422 11/06/2016 53-50N: 00-26W 53.83 -0.43 Oil Rough BD Platform Gearbox oil 0.00949 tonnes Drains System - Overflow of Vessel UKCS/1423 14/06/2016 56-50N: 02-15E 56.83 2.25 Oil Jade Steel Platform Diesel 0.0002 tonnes Diesel Bunkering Hose - Hose Parted from Coupling / Break Away Coupling UKCS/1910 14/06/2016 56-29N: 02-09E 56.48 2.15 Oil Fulmar A Platform Crude 0.008 tonnes Cuttings Chute- Pipework Failure UKCS/1424 14/06/2016 54-16N: 02-19E 54.27 2.32 Oil Murdoch MD Platform Condensate 0.000383 tonnes Flaring / Venting - Vent Line Drop Out UKCS/1425 14/06/2016 59-44N: 01-40E 59.73 1.67 Oil Bruce PUQ Platform Lubrication 0.000003 tonnes Turbines, Pumps etc. - Seal Failure

UKCS/1426 15/06/2016 61-29N: 01-28E 61.48 1.47 Oil Don SW&W Don Crude 0.00403 tonnes Pipework - Pinhole Northern Producer Leak UKCS/1427 15/06/2016 61-05N: 01-43E 61.08 1.72 Chemical Brent C Platform Rapeseed oil 5.796 kg Well Conductor - Suspected Defect UKCS/1428 16/06/2016 56-27N: 02-17E 56.45 2.28 Oil Clyde Platform Crude 0.00138 tonnes Pipework - Release From Joint UKCS/1429 16/06/2016 58-26N: 00-15W 58.43 -0.25 Oil Claymore A Platform Hydraulic 0.15 tonnes Cranes - Hydraulic System UKCS/1430 16/06/2016 60-44N: 02-29W 60.73 -2.48 Oil Clair Ridge Platform Unknown 0.0027545 tonnes Sheen Observed - Unknown Source UKCS/1431 18/06/2016 53-31N: 01-09E 53.52 1.15 Oil Pickerill B Platform Hydraulic 0.07 tonnes Hydraulic Manifold/Control Panel - Small Bore Fittings UKCS/1922 18/06/2016 58-22N: 00-40E 58.37 0.67 Chemical Tartan A Platform DIGLYCOLAMINE(DG 112 kg Chemical Injection - A)Baker Hughes Small Bore Fittings Petrosweet HSW85967 UKCS/1432 18/06/2016 54-34N: 02-17E 54.57 2.28 Oil Cygnus A PU Platform Diesel 0.8 tonnes Diesel Systems - Failure of Equipment UKCS/1433 18/06/2016 60-18N: 04-16W 60.30 -4.27 Chemical Foinaven - FPSO Oceanic HW540 v2 15645.6 kg Hydraulics - Open Petrojarl System - Fittings / Connections UKCS/1435 20/06/2016 60-03N: 03-58W 60.05 -3.97 Chemical Solan Platform HW443 1328.5 kg Hydraulics - Open System - Fittings / Connections UKCS/1436 21/06/2016 61-10N: 02-25W 61.17 -2.42 Chemical DeepSea Stavanger Oil based mud 1832 kg Trip Tank - Incorrect Valve Line-Up UKCS/1437 22/06/2016 57-48N: 00-58E 57.80 0.97 Oil Buzzard Wellhead Crude 0.00008 tonnes Sample Points - Platform Release Whilst Sampling UKCS/1438 22/06/2016 53-23N: 02-00E 53.38 2.00 Oil LOGGS GGS Production Diesel 0.00085 tonnes Diesel Systems - Platform Spilled Whilst Filling UKCS/1439 22/06/2016 60-37N: 01-39E 60.62 1.65 Oil Dunbar Platform Hydraulic 0.00166 tonnes Transfer Hose (Not Bunkering) - Hose Failure UKCS/1440 23/06/2016 56-41N: 02-20E 56.68 2.33 Oil COSL RIVAL at Judy Residual oil 0.0000051 tonnes Exhaust fumes - drop

out UKCS/1441 23/06/2016 58-05N: 03-09W 58.08 -3.15 Oil Beatrice C Platform Diesel 0.0000096 tonnes Flaring / Venting - 6 Vent Line Drop Out UKCS/1443 26/06/2016 56-29N: 02-09E 56.48 2.15 Oil Fulmar A Platform Diesel 0.00002 tonnes Turbines, Pumps etc. - Pipework Failure UKCS/1444 26/06/2016 54-26N: 02-28E 54.43 2.47 Oil Tyne Platform Hydraulic 0.005 tonnes Valves - Valve Failure UKCS/1445 26/06/2016 53-26N: 02-41E 53.43 2.68 Oil Brigantine BR Hydraulic 0.02 tonnes Transfer Hose (Not Bunkering) - Pinhole Leak UKCS/1446 26/06/2016 56-24N: 02-03E 56.40 2.05 Oil Auk A Platform Diesel 0.00041 tonnes Spill - During Manual Operations UKCS/1474 26/06/2016 54-35N: 00-26E 54.58 0.43 Oil Breagh Alpha Hydraulic 0.2 tonnes Lifeboats - Hydraulic System UKCS/1447 29/06/2016 58-29N: 01-16E 58.48 1.27 Oil Tiffany Platform Diesel 0.0177 tonnes Diesel Bunkering Hose - Pinhole Leak UKCS/1448 29/06/2016 57-00N: 01-50E 57.00 1.83 Oil Elgin Wellhead Platform Oily waste 0.00001 tonnes Drains System - A Overflow of Deck Drains UKCS/1449 30/06/2016 53-49N: 00-28E 53.82 0.47 Oil Rough AD Platform Hydraulic 0.00001 tonnes Cranes - Hydraulic System UKCS/1450 01/07/2016 53-23N: 02-00E 53.38 2.00 Oil LOGGS GGS Production Lubrication 0.0001155 tonnes Turbines, Pumps etc. - Platform 6 Seal Failure UKCS/1451 01/07/2016 61-16N: 01-35E 61.27 1.58 Oil Dunlin A Platform Diesel 0.05 tonnes Diesel Bunkering Hose - Pinhole Leak UKCS/1452 01/07/2016 58-18N: 01-46W 58.30 -1.77 Oil Captain WPP'A' Diesel 0.0044732 tonnes Diesel Systems - Spilled Whilst Filling UKCS/1453 04/07/2016 53-35N: 02-41E 53.58 2.68 Chemical Swift 10 Potassium Chloride 22.8 kg Tree Annulus - Brine Pressure Testing UKCS/1454 04/07/2016 60-03N: 03-58W 60.05 -3.97 Oil Ocean Valiant Crude 0.05 tonnes Well Test - Flare Drop Out UKCS/1455 05/07/2016 60-41N: 02-32W 60.68 -2.53 Chemical Clair Phase 1 Platform Bentonite; PAC-L; 288.4 kg Below Drill Floor to BAROFIBRE; Caustic Riser / Conductor - Soda Bell Nipple Failure UKCS/1460 05/07/2016 57-28N: 00-30E 57.47 0.50 Chemical Kittiwake A Platform Scortron G10150 0.0005 kg Chemical Injection - Small Bore Fittings

UKCS/1458 06/07/2016 60-48N: 01-27E 60.80 1.45 Oil Ninian Southern Hydraulic 0.003 tonnes ROV - Subsea Release Platform UKCS/1903 06/07/2016 57-15N: 00-48E 57.25 0.80 Chemical Anasuria FPSO Oceanic HW525 v2 5594.335 kg Drains-Water Based Chemicals UKCS/1459 07/07/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP QU Diesel 0.0004175 tonnes Transfer Hose (Not Platform Bunkering) - Open to Environment UKCS/1461 08/07/2016 56-44N: 00-40E 56.73 0.67 Oil Ensco 100 Crude 0.00043 tonnes Well Test - Flare Drop Out UKCS/1464 08/07/2016 53-05N: 02-07E 53.08 2.12 Oil Leman AD1 Platform Diesel 0.00008 tonnes Valves - Valve Failure [SHELL] UKCS/1462 10/07/2016 53-48N: 01-01E 53.80 1.02 Oil Hyde Platform Diesel 0.23 tonnes Diesel Systems - Failure of Equipment UKCS/1463 10/07/2016 60-52N: 03-08W 60.87 -3.13 Oil West Phoenix Oily waste 0.012 tonnes Spill - Deck Washing UKCS/1904 11/07/2016 59-44N: 01-40E 59.73 1.67 Chemical Bruce PUQ Platform Oceanic HW44 ND 1221 kg Hydraulics-Open System-SCM Failure UKCS/1465 11/07/2016 60-44N: 02-29W 60.73 -2.48 Oil Clair Ridge Platform Diesel 0.0003 tonnes Drains System - Oil to Non-Recoverable UKCS/1466 12/07/2016 56-11N: 02-47E 56.18 2.78 Chemical EnQuest Producer AQUALINK HT804F 1834.66 kg Hydraulics - Open VER2 System - SCM Failure (Otherwise unspecified) UKCS/1469 14/07/2016 59-44N: 01-40E 59.73 1.67 Oil Bruce PUQ Platform Lubrication 0.0102459 tonnes Turbines, Pumps etc. - Seal Failure UKCS/1467 15/07/2016 58-06N: 01-26W 58.10 -1.43 Oil Ross FPSO Bleo Holm Hydraulic 0.00589 tonnes Cranes - Hydraulic System UKCS/1468 15/07/2016 56-44N: 00-40E 56.73 0.67 Oil Ensco 100 Hydraulic 0.00008 tonnes Hose (Topsides, Not Bunkering) - Hose Parted from Coupling / Break Away Coupling UKCS/1901 16/07/2016 61-11N: 00:43E 61.18 0.72 Oil Ocean Guardian Hydraulic 0.00086 tonnes ROV-Subsea Release UKCS/1470 17/07/2016 58-41N: 01-16E 58.68 1.27 Chemical Brae West-Sedgwick Oceanic HW443ND 585 kg Hydraulics - Closed Completions system - Valve Failure UKCS/1471 17/07/2016 61-28N: 01-30E 61.47 1.50 Chemical Don South West - SSC OS-2 20.4 kg Entrained Chemicals - Water Injection - Leak

UKCS/1472 18/07/2016 56-50N: 02-10E 56.83 2.17 Chemical Paul B Lloyd Jnr Castrol Transaqua HT2 40.8 kg Hoses (Subsea) - Hydraulic Hose UKCS/1473 18/07/2016 57-00N: 01-50E 57.00 1.83 Oil Elgin Wellhead Platform Hydraulic 0.0002 tonnes Hydraulic A Manifold/Control Panel - Seal Failure UKCS/1909 19/07/2016 60-30N: 01-50E 60.50 1.83 Chemical Dunbar Platform Oceanic HW443 R 2033 kg Hydraulics - Open System -SCSSV Failure UKCS/1475 19/07/2016 54-26N: 02-28E 54.43 2.47 Chemical Tyne Platform Oil base mud / annular 0.004 kg Turbines, Pumps etc. - fluid (unable to identify) Seal Failure UKCS/1476 20/07/2016 57-02N: 02-04E 57.03 2.07 Chemical Erskine Platform Castrol Brayco Micronic 286 kg Fixed Chemical SV/3 Pipework (Utility Chemicals) - Release From Joint UKCS/1477 21/07/2016 57-01N: 01-57E 57.02 1.95 Chemical Shearwater A Wellhead Refined rapeseed oil 0.04 kg Wellheads - Spill Platform Whilst Topping up Annulus UKCS/1478 23/07/2016 53-18N: 02-34E 53.30 2.57 Oil Inde CD Platform Diesel 0.05 tonnes Diesel Systems - (PERENCO) Pinhole Leak UKCS/1494 23/07/2016 53-24N: 01-47E 53.40 1.78 Oil Clipper South Hydraulic 0.006 tonnes Lifeboats - Hydraulic System UKCS/1479 24/07/2016 56-23N: 02-15E 56.38 2.25 Oil Janice A FPU Diesel 0.699638 tonnes Diesel Systems - Spilled Whilst Filling UKCS/1480 24/07/2016 56-50N: 02-15E 56.83 2.25 Oil Jade Steel Platform Hydraulic 0.004425 tonnes Hydraulic Manifold/Control Panel - Small Bore Fittings UKCS/1481 24/07/2016 58-18N: 01-44W 58.30 -1.73 Oil Captain FPSO Crude 0.0025953 tonnes Drains System - Overflow of Deck Drains UKCS/1482 24/07/2016 60-03N: 03-58W 60.05 -3.97 Chemical Solan Platform EC6198A;EC6718A 0.02781 kg Entrained Chemicals - Water Injection - Leak UKCS/1483 25/07/2016 60-37N: 01-39E 60.62 1.65 Oil Dunbar Platform Hydraulic 0.002 tonnes Pipework - Total Rupture UKCS/1484 25/07/2016 57-01N: 01-57E 57.02 1.95 Oil Shearwater A Wellhead Lubrication 0.0045 tonnes Spill - Knocked Over / Platform Dropped

UKCS/1485 27/07/2016 61-05N: 01-43E 61.08 1.72 Oil Brent C Platform Hydraulic 0.0001 tonnes Hydraulics - Closed system - Valve Failure UKCS/1486 27/07/2016 53-39N: 03-28W 53.65 -3.47 Chemical Hamilton North Platform Oceanic HW540 E 200 kg Hydraulics - Open System - Umbilical Rupture UKCS/1487 28/07/2016 57-22N: 01-22E 57.37 1.37 Chemical Arbroath Platform Pelagic 100 Production 1 kg Accumulator Bottle - Control Fluid Small Bore Fittings UKCS/1488 29/07/2016 61-05N: 01-43E 61.08 1.72 Chemical Brent C Platform TEG (Triethylene glycol) 90.04 kg Fixed Chemical Pipework (Utility Chemicals) - Release From Joint UKCS/1489 30/07/2016 60-03N: 03-58W 60.05 -3.97 Oil Solan Platform Oily Waste 0.0001 tonnes Drains System - Overflow of Deck Drains UKCS/1490 31/07/2016 58-02N: 01-08E 58.03 1.13 Oil Britannia Platform Oily Waste 0.000885 tonnes Drains System - Overflow of Deck Drains UKCS/1491 31/07/2016 60-52N: 03-08W 60.87 -3.13 Chemical West Phoenix Oceanic HW 460 (no 80 kg Lower Marine Riser dye) Package - Valve Failure UKCS/1492 01/08/2016 60-35N: 01-48E 60.58 1.80 Chemical Ellon Manifold Oceanic HW443 R 581 kg Hydraulics - Open System - Solenoid Failure UKCS/1493 02/08/2016 61-37N: 01-18E 61.62 1.30 Oil Magnus Platform Oily Waste 0.000072 tonnes Entrained Oil - Oil System UKCS/1496 02/08/2016 58-02N: 01-24E 58.03 1.40 Chemical Andrew Platform Castrol Transaqua HT2 2457 kg Hydraulics - Open System - Fittings / Connections UKCS/1495 03/08/2016 60-51N: 01-28E 60.85 1.47 Oil Ninian Central Platform Crude 0.14 tonnes Valves - Valve Failure UKCS/1497 03/08/2016 58-18N: 01-42W 58.30 -1.70 Oil Blackford Dolphin Hydraulic 0.002 tonnes Pipework - Small Bore Fittings UKCS/1498 06/08/2016 57-57N: 00-54W 57.95 -0.90 Chemical Golden Eagle W Methanol (all grades) 4460 kg Fixed Chemical Platform Pipework (Utility Chemicals) - Open to Environment

UKCS/1499 07/08/2016 58-06N: 01-26W 58.10 -1.43 Chemical Blake Flank WHPS F2W Oceanic HW 443 250 kg Hydraulics - Open System - Solenoid Failure UKCS/1500 07/08/2016 61-37N: 01-18E 61.62 1.30 Oil Magnus Platform Unknown 0.001 tonnes Sheen Observed - Unknown Source UKCS/1501 08/08/2016 60-54N: 01-25E 60.90 1.42 Oil Ninian Northern Lubrication 0.005 tonnes Wireline Operations - Platform Greasehead Overflow UKCS/1502 08/08/2016 60-03N: 03-58W 60.05 -3.97 Chemical Solan Platform Oceanic HW 443 225 kg Hydraulics - Open System - Solenoid Failure UKCS/1503 10/08/2016 54-14N: 02-09E 54.23 2.15 Chemical Boulton BM platform Methanol 1.53628 kg Fixed Chemical Pipework (Utility Chemicals) - Release From Joint UKCS/1504 10/08/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Hydraulic 0.000008 tonnes Hydraulic Platform Manifold/Control Panel - Small Bore Fittings UKCS/1505 11/08/2016 53-19N: 02-21E 53.32 2.35 Oil Ensco 92 Unknown 0.0000000 tonnes Sheen Observed - 1 Unknown Source UKCS/1506 12/08/2016 61-36N: 01-32E 61.60 1.53 Chemical DSV Seven Atlantic at Temblock 50 137 kg Subsea Intervention Penguins DC3 Work - Failure of Equipment UKCS/1507 13/08/2016 58-30N: 01-15E 58.50 1.25 Chemical Tiffany Platform Castrol Transaqua HT2 89 kg Hydraulics - Open System - Fittings / Connections UKCS/1508 13/08/2016 60-48N: 01-44E 60.80 1.73 Oil Alwyn North NAA Lubrication 0.000058 tonnes Drains System - Open Platform to Environment UKCS/1509 14/08/2016 57-57N: 01-50E 57.95 1.83 Oil Armada Platform Diesel 0.5 tonnes Diesel Bunkering Hose - Total Rupture UKCS/1510 14/08/2016 60-44N: 02-29W 60.73 -2.48 Oil Clair Ridge Platform Diesel 0.000663 tonnes Diesel Systems - Pinhole Leak UKCS/1511 14/08/2016 54-01N: 03-51W 54.02 -3.85 Oil Seajacks Hydra Diesel 0.0001 tonnes Diesel Bunkering Hose - Open to Environment UKCS/1512 14/08/2016 59-27N: 01-34E 59.45 1.57 Oil Beryl A Platform Unknown 0.0001 tonnes Subsea Pipelines - Pipework Failure

UKCS/1513 15/08/2016 57-02N: 02-04E 57.03 2.07 Chemical Erskine Platform Castrol Brayco Micronic 1.644 kg Hydraulic Filter - Drain SV/3 Plug UKCS/1514 15/08/2016 58-02N: 01-08E 58.03 1.13 Chemical Britannia Platform TRASAR TRAC103 163 kg Entrained Chemicals - Utility System UKCS/1515 15/08/2016 61-16N: 00-55E 61.27 0.92 Oil Tern Platform Oily Waste 0.00018 tonnes Drains System - Pipework Failure UKCS/1516 17/08/2016 58-07N: 01-28E 58.12 1.47 Oil Byford Dolphin Hydraulic 0.005 tonnes Anchor winch - cooler tube UKCS/1517 18/08/2016 58-18N: 01-42W 58.30 -1.70 Chemical Blackford Dolphin STACK-MAGIC ECO-F 1651.61 kg BOP (Subsea) - POD V2; MONOTHYLEN Failure GLYCOL UKCS/1518 19/08/2016 57-00N: 01-50E 57.00 1.83 Oil Elgin Wellhead Platform Hydraulic 0.08 tonnes Valve Actuator - A Internal Leak UKCS/1519 19/08/2016 58-18N: 01-42W 58.30 -1.70 Oil Blackford Dolphin Hydraulic 0.01 tonnes ROV - Subsea Release UKCS/1520 20/08/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Hydraulic 0.257728 tonnes Hydraulic Platform Manifold/Control Panel - Small Bore Fittings UKCS/1917 20/08/2016 61-!!N. 00-43E #VALU 0.72 Chemical Ocean Guardian Carbosea OBM 652 kg Flow Line - Seal E! Failure UKCS/1526 20/08/2016 56-23N: 02-15E 56.38 2.25 Oil Maersk Achiever Hydraulic 0.00675 tonnes Hot stab popped out of cleaning tool receptacle UKCS/1521 21/08/2016 58-17N: 00-27E 58.28 0.45 Chemical Galley Subsea Pelagic 100 Production 119 kg Failure of SCSSV Completion Control Fluid Hydraulic Control Line UKCS/1522 21/08/2016 60-12N: 03-52W 60.20 -3.87 Oil Transocean Spitsbergen Crude 0.0000306 tonnes Well Test - Flare Drop Out UKCS/1523 21/08/2016 60-12N: 03-52W 60.20 -3.87 Oil Transocean Spitsbergen Crude 0.00272 tonnes Well Test - Flare Drop Out UKCS/1525 21/08/2016 58-17N: 00-27E 58.28 0.45 Chemical Galley Subsea Pelagic 100 Production 22 kg Subsea Intervention Completion Control Fluid Work - Release During Operation UKCS/1527 23/08/2016 58-27N: 00-15E 58.45 0.25 Chemical Piper B Platform Pelagic 100 (H) 136 kg Subsea Pipelines - Production Control Fluid Pipework Failure UKCS/1528 24/08/2016 58-06N: 01-26E 58.10 1.43 Oil Cyrus Manifold Crude 0.0000170 tonnes Subsea Pipelines - 2 Pipework Failure UKCS/1529 24/08/2016 58-06N: 01-26E 58.10 1.43 Oil Farragon Manifold Crude 0.00796 tonnes Subsea Pipelines -

Pipework Failure UKCS/1530 25/08/2016 53-02N: 02-14E 53.03 2.23 Chemical Leman South subsea Castrol Transaqua HT2 5 kg Subsea Chemical well, 15y (West) Systems - Valve Failure UKCS/1911 25/08/2016 56-29N: 02-09E 56.48 2.15 Chemical Fulmar A Platform BIOTREAT 4549 192.1 kg Entrained Chemicals- Seawater System-Leak UKCS/1531 25/08/2016 58-18N: 01-42W 58.30 -1.70 Oil Blackford Dolphin Hydraulic 0.001 tonnes ROV - Subsea Release UKCS/1532 26/08/2016 60-54N: 01-25E 60.90 1.42 Oil Ninian Northern Crude 0.087 tonnes Vessels (Not Storage) - Platform Over Filled UKCS/1533 26/08/2016 57-01N: 01-57E 57.02 1.95 Oil Hans Deul Hydraulic 0.00075 tonnes Hose (Topsides, Not Bunkering) - Total Rupture UKCS/1534 27/08/2016 57-00N: 01-50E 57.00 1.83 Oil GSF Galaxy I Diesel 0.000845 tonnes Diesel Bunkering Hose - Hose Parted from Coupling / Break Away Coupling UKCS/1915 27/08/2016 60-45N: 01-25E 60.75 1.42 Oil Ninian Northern Oily Waste 0.529 tonnes Drains System- Platform Overflow of Vessel UKCS/1535 27/08/2016 60-44N: 02-29W 60.73 -2.48 Oil Clair Ridge Platform Unknown 0.0000637 tonnes Sheen Observed - 5 Unknown Source UKCS/1536 28/08/2016 61-16N: 00-55E 61.27 0.92 Oil Tern Platform Lubrication 0.000846 tonnes Transfer Hose (Not Bunkering) - Release From Joint UKCS/1537 28/08/2016 61-05N: 01-43E 61.08 1.72 Oil Brent C Platform Hydraulic 0.01 tonnes Lifeboats - Hydraulic System UKCS/1538 28/08/2016 57-57N: 01-50E 57.95 1.83 Oil Armada Platform Diesel 0.003 tonnes Cranes - Diesel System UKCS/1912 29/08/2016 57-09N: 02-17E 57.15 2.28 Chemical Haewne Brim Methanol (all grades) 15560 kg Subsea Chemical Systems -Release at Well UKCS/1539 29/08/2016 58-05N: 01-23W 58.08 -1.38 Chemical Ross Manifold A Pelagic 100 Production 3.3 kg Hydraulics - Open Control Fluid System - Umbilical Rupture UKCS/1540 31/08/2016 60-41N: 02-32W 60.68 -2.53 Chemical Clair Phase 1 Platform Castrol Transaqua HT2 25 kg Below Drill Floor to Riser / Conductor - Diverter

UKCS/1541 01/09/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 13 kg Conductor Tensioner - Seal Failure UKCS/1542 01/09/2016 57-22N: 01-59E 57.37 1.98 Chemical Mungo Production FX2504 5 kg Chemical Injection - Manifold Small Bore Fittings UKCS/1543 02/09/2016 54-35N: 02-11E 54.58 2.18 Oil Cygnus B Platform Lubrication 0.0001131 tonnes Drill Floor - Top Drive UKCS/1544 02/09/2016 57-57N: 00-54W 57.95 -0.90 Chemical Golden Eagle W Methanol (all grades) 1592 kg Fixed Chemical Platform Pipework (Utility Chemicals) - Open to Environment UKCS/1697 02/09/2016 60-22N: 04-01W 60.37 -4.02 Oil Deepsea Aberdeen Hydraulic 0.0005 tonnes ROV - Subsea Release UKCS/1545 04/09/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Helifuel 0.00067 tonnes Spill - Deck Washing Platform UKCS/1546 05/09/2016 60-48N: 01-44E 60.80 1.73 Oil Alwyn North NAA Diesel 0.0377208 tonnes Drains Systems - Over Platform Filled UKCS/1547 05/09/2016 57-57N: 00-54W 57.95 -0.90 Oil Golden Eagle PUQ Diesel 4.8 tonnes Diesel Systems - Over Platform Filled UKCS/1913 06/09/2016 60-37N: 01-39E 60.62 1.65 Jura WHPS 2 Oceanic HW443 42.8 kg Well Production Valve - Seal Failure UKCS/1548 06/09/2016 57-22N: 01-59E 57.37 1.98 Oil Mungo Production Hydraulic 0.1041 tonnes Hydraulic Manifold Manifold/Control Panel - Small Bore Fittings UKCS/1550 07/09/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 22.5 kg Conductor Tensioner - Seal Failure UKCS/1559 07/09/2016 54-02N: 02-29E 54.03 2.48 Oil Ketch A Platform Hydraulic 0.0005 tonnes Cranes - Hydraulic System UKCS/1551 08/09/2016 57-45N: 01-48E 57.75 1.80 Oil Everest North Platform Diesel 0.00021 tonnes Diesel Systems - Pipework Failure UKCS/1916 08/09/2016 61-29N: 01-28E 61.48 1.47 Chemical Northern Producer DF1 0.01 kg Subsea- Annular Fluid UKCS/1577 08/09/2016 57-17N: 01-39E 57.28 1.65 Chemical Marnock ETAP PDR EC6116A; PermaTreat 10.593 kg Entrained Chemicals - Platform PC-191; EC6804A Utility System UKCS/1552 09/09/2016 59-32N: 01-32E 59.53 1.53 Oil Beryl A Platform Crude 0.009 tonnes Drains System - Overflow of Vessel UKCS/1553 09/09/2016 58-13N: 01-06E 58.22 1.10 Oil Balmoral FPV Crude 0.000002 tonnes Turbines, Pumps etc. - Seal Failure UKCS/1554 09/09/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 7 kg Conductor Tensioner -

Seal Failure UKCS/1555 09/09/2016 53-50N: 03-34W 53.83 -3.57 Oil Morecambe South CPP1 Oily Waste 0.004 tonnes Drains System - Platform Pipework Failure UKCS/1556 09/09/2016 59-44N: 01-40E 59.73 1.67 Oil Bruce PUQ Platform Unknown 0.0000391 tonnes Sheen Observed - 68 Unknown Source UKCS/1557 09/09/2016 57-11N: 01-54E 57.18 1.90 Oil Maersk Highlander Diesel 0.6 tonnes Diesel Bunkering Hose - Total Rupture UKCS/1558 10/09/2016 53-50N: 00-26W 53.83 -0.43 Oil Rough BD Platform Oily Waste 0.00002 tonnes Drains System - Overflow of Deck Drains UKCS/1566 10/09/2016 57-22N: 01-59E 57.37 1.98 Chemical Mungo Production EC6199A; EC6804A; 2834.91 kg Entrained Chemicals - Manifold SODIUM Utility System HYPOCHLORITE SOLUTION GENERATED IN SITU UKCS/1560 12/09/2016 57-09N: 02-17E 57.15 2.28 Chemical Pierce FPSO (Haewene Transaqua HT2 140 kg Subsea Intervention Brim) Work - Release During Operation UKCS/1561 12/09/2016 56-27N: 02-17E 56.45 2.28 Chemical Clyde Platform Pelagic 100 Production 1 kg Hydraulics - Open Control Fluid System - Fittings / Connections UKCS/1562 14/09/2016 61-13N: 00-42E 61.22 0.70 Oil Ocean Guardian Crude 0.00036 tonnes Vent Line - Liquid Drop Out UKCS/1563 14/09/2016 61-05N: 01-43E 61.08 1.72 Oil MV Regalia Flotel Diesel 0.02 tonnes Diesel Bunkering Hose (Prosafe) - Total Rupture UKCS/1565 15/09/2016 56-27N: 02-17E 56.45 2.28 Chemical Flyndre Manifold Oceanic 60/40 10 kg Subsea Chemical Systems - Fittings / Connections UKCS/1567 16/09/2016 58-26N: 00-15W 58.43 -0.25 Chemical Claymore A Platform Pelagic 100 Production 148 kg Hydraulic Control Fluid Manifold/Control Panel - Small Bore Fittings UKCS/1569 18/09/2016 60-48N: 01-44E 60.80 1.73 Oil Alwyn North NAA Diesel 0.000015 tonnes Drains System - Platform Overflow of Deck Drains UKCS/1574 18/09/2016 60-03N: 03-58W 60.05 -3.97 Chemical Solan Platform EC6198A 0.000373 kg Chemical Injection -

Pump Failure UKCS/1568 19/09/2016 57-01N: 01-57E 57.02 1.95 Oil Shearwater C PUQ Oily waste 0.03 tonnes Drains System - Platform Overflow of Vessel UKCS/1570 19/09/2016 61-21N: 01-34E 61.35 1.57 Chemical Thistle A Platform Sodium Hypochlorite 14- 1605 kg Storage Tanks etc. - 16% Total Rupture UKCS/1571 20/09/2016 58-02N: 01-24E 58.03 1.40 Chemical Andrew Platform Methanol 83 kg Chemical Injection - Pump Failure UKCS/1572 21/09/2016 61-35N: 01-18E 61.58 1.30 Chemical Paul B Lloyd Jnr Oceanic HD 433 ND 1 kg Hoses (Subsea) - Hydraulic Hose UKCS/1573 22/09/2016 56-27N: 02-17E 56.45 2.28 Chemical Clyde Platform Aquaglycol 24F 20 kg Subsea Chemical Systems - Valve Failure UKCS/1581 22/09/2016 57-01N: 01-57E 57.02 1.95 Chemical Shearwater C PUQ CRW85733 44.5056 kg Entrained Chemicals - Platform Utility System UKCS/1575 23/09/2016 56-27N: 02-17E 56.45 2.28 Chemical Clyde Platform Pelagic 100 Production 0.015 kg Hydraulics - Closed Control Fluid system - Valve Failure UKCS/1576 23/09/2016 58-22N: 00-04E 58.37 0.07 Oil Tartan A Platform Diesel 0.00474 tonnes Diesel System - Open to Environment UKCS/1578 25/09/2016 58-18N: 01-46W 58.30 -1.77 Chemical Captain WPP'A' Oceanic HW540 E 670 kg Hydraulics - Open System - Fittings / Connections UKCS/1579 25/09/2016 53-24N: 01-16E 53.40 1.27 Oil Guinevere Platform Diesel 0.005 tonnes Diesel Bunkering Hose - Pinhole Leak UKCS/1920 26/09/2016 58-17N: 00-12E 58.28 0.20 Chemical Scott South Subsea Oceanic HW540E 3018.64 kg Hydraulics-Open Structure E System-Fluid Venting UKCS/1580 26/09/2016 58-25N: 00-19W 58.42 -0.32 Chemical Seawell Monoethylene Glycol 6.44 kg Subsea Intervention (MEG) (all dilutions) Work - Failure of Equipment UKCS/1582 29/09/2016 53-03N: 02-17E 53.05 2.28 Oil Leman BD Platform Hydraulic 0.02 tonnes Valves - Gland / [PERENCO] Packing Failure UKCS/1583 29/09/2016 58-26N: 00-15W 58.43 -0.25 Chemical Claymore A Platform OSW85797; SODIUM 55.06 kg Water Injection HYPOCHLORITE Pipework - Pinhole SOLUTION Leak GENERATED IN SITU UKCS/1584 01/10/2016 60-54N: 01-25E 60.90 1.42 Oil Ninian Northern Hydraulic 0.1 tonnes Cranes - Coolant

Platform System UKCS/1585 02/10/2016 60-54N: 01-25E 60.90 1.42 Oil Ninian Northern Crude 0.04 tonnes Drains System - Platform Pipework Failure UKCS/1586 02/10/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 27.5 kg Conductor Tensioner - Seal Failure UKCS/1587 02/10/2016 60-54N: 01-25E 60.90 1.42 Oil Ninian Northern Crude 0.005 tonnes Drains System - Platform Overflow of Vessel UKCS/1588 04/10/2016 54-35N: 02-11E 54.58 2.18 Chemical Cygnus B Platform Fluorodye UC; RX-5248 0.0025 kg Subsea Chemical Systems - Fittings / Connections UKCS/1589 04/10/2016 53-18N: 02-34E 53.30 2.57 Oil Inde AQ Platform Diesel 0.005 tonnes Diesel Bunkering Hose (PERENCO) - Pinhole Leak UKCS/1590 04/10/2016 53-26N: 02-19E 53.43 2.32 Oil Viking BD Hydraulic 0.203 tonnes Turbines, Pumps etc. - Failure of Equipment UKCS/1591 06/10/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 22.5 kg Conductor Tensioner - Seal Failure UKCS/1592 06/10/2016 57-00N: 01-50E 57.00 1.83 Oil Elgin PUQ Platform Diesel 0.0041612 tonnes Drains System - Overflow of Deck Drains UKCS/1593 07/10/2016 60-03N: 03-58W 60.05 -3.97 Chemical Solan Platform EC6198A 0.008964 kg Bursting Disc/PSV - Failure UKCS/1594 08/10/2016 57-04N: 02-05E 57.07 2.08 Oil Machar Manifold Hydraulic 0.0109 tonnes Hydraulics - Closed system - Fittings / Connections UKCS/1595 08/10/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 22.5 kg Conductor Tensioner - Seal Failure UKCS/1596 09/10/2016 57-45N: 01-48E 57.75 1.80 Oil Everest North Platform Lubrication 0.0000004 tonnes Turbines, Pumps etc. - 8 Seal Failure UKCS/1597 09/10/2016 53-21N: 02-02E 53.35 2.03 Oil North Valiant 2 SP Hydraulic 0.06 tonnes Failure of valve seal UKCS/1598 10/10/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 22.5 kg Conductor Tensioner - Seal Failure UKCS/1599 13/10/2016 53-11N: 02-51E 53.18 2.85 Oil Sean PP Platform Lubrication 3.66 tonnes Storage (Hydraulic Oils, Lube Oils) - Drain Line Open

UKCS/1600 13/10/2016 60-41N: 02-32W 60.68 -2.53 Chemical Clair Phase 1 Platform EC6312A 0.2 kg Transfer Hose (Not Bunkering) - Release From Joint UKCS/1601 13/10/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 22.5 kg Conductor Tensioner - Seal Failure UKCS/1602 13/10/2016 61-16N: 00-55E 61.27 0.92 Oil Tern Platform Diesel 0.003 tonnes Diesel Bunkering Hose - Pinhole Leak UKCS/1603 13/10/2016 54-01N: 01-06E 54.02 1.10 Oil Ravenspurn North CPP Diesel 0.0000178 tonnes Overfill of diesel tank Platform UKCS/1604 14/10/2016 57-45N: 01-48E 57.75 1.80 Chemical Everest North Platform TEG (Triethylene glycol) 394 kg Fixed Chemical Pipework (Utility Chemicals) - Release From Joint UKCS/1605 14/10/2016 53-45N: 01-04E 53.75 1.07 Chemical West Sole WC Platform HYTREAT 12773K 10 kg Chemical Injection - Valve Failure UKCS/1606 14/10/2016 54-02N: 00-43E 54.03 0.72 Oil Cleeton CPQ Platform Lubrication 0.001 tonnes Entrained Oil - Utility System UKCS/1607 15/10/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Hydraulic 0.0004 tonnes Pipework - Pinhole Platform Leak UKCS/1608 15/10/2016 61-35N: 01-18E 61.58 1.30 Chemical Paul B Lloyd Jnr STACK MAGIC ECO 0.162 kg Hoses (Subsea) - v2 Hydraulic Hose UKCS/1609 16/10/2016 60-11N: 03-51W 60.18 -3.85 Oil Transocean Spitsbergen Crude 0.0000448 tonnes Well Test - Flare Drop 2 Out UKCS/1610 16/10/2016 53-26N: 02-19E 53.43 2.32 Oil Viking BA Platform Hydraulic 0.21 tonnes Turbines, Pumps etc. - Pump Failure UKCS/1611 17/10/2016 60-11N: 03-51W 60.18 -3.85 Oil Transocean Spitsbergen Crude 0.0000027 tonnes Well Test - Flare Drop Out UKCS/1612 18/10/2016 58-02N: 01-08E 58.03 1.13 Oil Britannia Platform Lubrication 0.02583 tonnes Hydraulics - Closed (Alder SSIV) system - Valve Failure UKCS/1613 19/10/2016 58-17N: 00-25E 58.28 0.42 Chemical Galley Subsea Pelagic 100 Production 90.7 kg Well - Small Subsea Completion Control Fluid Release from Well UKCS/1614 20/10/2016 60-18N: 04-16W 60.30 -4.27 Chemical Foinaven - FPSO Oceanic HW540 v2 74 kg Hydraulics - Open Petrojarl System - Fittings / Connections UKCS/1615 20/10/2016 57-27N: 01-23E 57.45 1.38 Oil Montrose A Platform Oily water 0.0000096 tonnes Drains System -

52 Overflow of Deck Drains UKCS/1616 21/10/2016 61-05N: 01-43E 61.08 1.72 Oil Brent C Platform Oily waste 0.00003 tonnes Drains System - Overflow of Vessel UKCS/1617 22/10/2016 61-14N: 01-08E 61.23 1.13 Oil Cormorant North Crude 0.000013 tonnes Pipework - Release Platform From Joint UKCS/1618 22/10/2016 60-57N: 00-56E 60.95 0.93 Chemical Heather A Platform EnviroSolv GNS 486 kg Spill - During Manual Operations UKCS/1619 23/10/2016 54-35N: 02-11E 54.58 2.18 Chemical Cygnus B Platform Versapro - oil Based mud 2 kg Pipework - Release From Joint UKCS/1620 23/10/2016 57-10N: 01-26E 57.17 1.43 Chemical Mirren Subsea RX-9022 335 kg Subsea Chemical Completion FLUORESCENT Systems - Fittings / PIPEDYE 50:50 meg Connections mix UKCS/1621 24/10/2016 56-11N: 02-47E 56.18 2.78 Chemical EnQuest Producer AQUALINK HT804F 870 kg Hydraulics - Open VER2 System - SCM Failure (Otherwise unspecified) UKCS/1622 25/10/2016 57-17N: 01-39E 57.28 1.65 Chemical ETAP PDR Mirrans EC14261A Corrosion 1.5 kg Fixed Chemical Madoes UJB cabinet Inhibitor Pipework (Production supply Chemicals) - Small Bore Fittings UKCS/1623 27/10/2016 53-00N: 02-12E 53.00 2.20 Oil Leman H Platform Hydraulic 0.0005 tonnes Hydraulic [PERENCO] Manifold/Control Panel - Small Bore Fittings UKCS/1624 30/10/2016 53-49N: 00-28E 53.82 0.47 Oil Rough AD Platform Condensate 0.000327 tonnes Drains System - Overflow of Deck Drains UKCS/1625 31/10/2016 54-01N: 01-06E 54.02 1.10 Chemical Ravenspurn North CPP AQUALINK HT804F 37.5 kg Hydraulics - Open Platform VER2 System - Solenoid Failure UKCS/1626 02/11/2016 58-00N: 00-55W 58.00 -0.92 Chemical Golden Eagle Northern RX-9022; FX2504 5121.14 kg Subsea Chemical Manifold Systems - Fittings / Connections UKCS/1627 02/11/2016 60-11N: 03-51W 60.18 -3.85 Oil Transocean Spitsbergen Hydraulic 0.001 tonnes ROV - Subsea Release

UKCS/1628 03/11/2016 57-57N: 00-54W 57.95 -0.90 Chemical Golden Eagle PUQ Sodium hypochlorite 0.103 kg Fixed Chemical Platform solution generated in situ Pipework (Utility Chemicals) - Pipework Failure UKCS/1629 03/11/2016 60-41N: 02-32W 60.68 -2.53 Chemical Clair Phase 1 Platform Class 'G' oilwell 10 kg Vent Line - Flow (Portland) cement During Operational Use UKCS/1630 04/11/2016 60-48N: 01-44E 60.80 1.73 Oil Alwyn North NAA Diesel 0.00053 tonnes Diesel Bunkering Hose Platform - Loose Connection UKCS/1631 04/11/2016 53-26N: 02-19E 53.43 2.32 Chemical Viking BP Platform METHANOL (all 23734.41 kg Decommissioning grades); KI-5351; WG- Related 11; Bactgron B1150; FE- 2; K-35; NF-6 UKCS/1921 05/11/2016 57-37N: 01-38E 57.62 1.63 Chemical Seven Voyageur Monoethylene Glycol 157.85 kg Chemical Injection - (All Dilutions),RO FSA Small Bore Fittings S945K UKCS/1906 07/11/2016 56-44N: 01-17E 56.73 1.28 Oil Curlew FPSO Diesel 0.02 tonnes Diesel Bunkereing Hose- Pinhole Leak UKCS/1632 08/11/2016 57-00N: 01-50E 57.00 1.83 Chemical Prospector 5 EDC 99-DW 0.41 kg Chemical Bunkering Hose - Total Rupture UKCS/1633 10/11/2016 61-05N: 01-43E 61.08 1.72 Oil Brent C Platform Diesel 0.0000012 tonnes Seal failure on diesel 48 pump UKCS/1634 11/11/2016 57-01N: 01-57E 57.02 1.95 Oil Shearwater C PUQ Hydraulic 0.0063 tonnes Hydraulics - Closed Platform system - Fittings / Connections UKCS/1635 11/11/2016 53-32N: 02-15E 53.53 2.25 Chemical Viking AR Platform METHANOL (all 898.58 kg Decommissioning grades); KI-5351 Related UKCS/1636 12/11/2016 57-40N: 00-25E 57.67 0.42 Chemical Kittiwake A Platform AQUALINK HT804F 400 kg Subsea Intervention VER2 Work - Release During Operation UKCS/1637 12/11/2016 61-16N: 00-55E 61.27 0.92 Chemical Tern Platform WCW85775UC 98.5 kg Overfilled calibration pot on pump skid UKCS/1638 13/11/2016 57-00N: 01-50E 57.00 1.83 Chemical Prospector 5 EDC 99-DW; Barite 4,1 888 kg BOP (Subsea) - POD D31 Failure

UKCS/1639 13/11/2016 60-48N: 01-27E 60.80 1.45 Oil Ninian Southern Lubrication 0.114 tonnes Hydraulic Platform Manifold/Control Panel - Small Bore Fittings UKCS/1640 15/11/2016 60-19N: 04-06W 60.32 -4.10 Chemical Deepsea Aberdeen Erifon HD603HP (no 27.56 kg BOP (Subsea) - POD dye) Failure UKCS/1641 15/11/2016 54-35N: 02-11E 54.58 2.18 Oil Cygnus B Platform Lubrication 0.00005 tonnes Dripping winch oil to sea from lifeboat UKCS/1642 15/11/2016 57-11N: 01-54E 57.18 1.90 Chemical Maersk Highlander Erifon CLS 40 3552 kg BOP (Topsides) - Hydraulic System UKCS/1905 16/11/2016 56-27N:02-17E 56.45 2.28 Oil Clyde Platform Lubication 0.004 tonnes SSIV Release-Seal Failure UKCS/1643 16/11/2016 53-03N: 02-14E 53.05 2.23 Oil Leman BT Platform Hydraulic 0.0286 tonnes Hydraulic [PERENCO] Manifold/Control Panel - Small Bore Fittings UKCS/1644 17/11/2016 53-32N: 02-15E 53.53 2.25 Oil Viking AR Platform Diesel 0.003 tonnes Redundant diesel pipework UKCS/1645 20/11/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 22.5 kg Conductor Tensioner - Seal Failure UKCS/1646 21/11/2016 60-44N: 02-29W 60.73 -2.48 Oil Clair Ridge Platform Diesel 0.0000002 tonnes Drains System - 55 Overflow of Deck Drains UKCS/1647 21/11/2016 53-38N: 03-28W 53.63 -3.47 Chemical Hamilton North Platform Oceanic HW 540E (no 159 kg Hydraulic dye) Manifold/Control Panel - Small Bore Fittings UKCS/1648 22/11/2016 57-04N: 00-53E 57.07 0.88 Chemical Clapham DC5 Manifold MEG 8.4 kg Subsea Chemical Systems - Fittings / Connections UKCS/1649 22/11/2016 59-36N: 01-19E 59.60 1.32 Chemical WilPhoenix Carbo-sea OBM 125 kg Hose (Topsides, Not Bunkering) - Pinhole Leak UKCS/1650 23/11/2016 61-06N: 01-04E 61.10 1.07 Oil Cormorant A Platform Hydraulic 0.01752 tonnes Cranes - Hydraulic System UKCS/1919 23/11/2016 60-22N: 04-06W 60.37 -4.10 Chemical Schiehallion MEG/Water mixes,RX- 0.90028 kg Subsea Intervention - 9022, RX 5248 Pressure Testing UKCS/1651 24/11/2016 57-00N: 01-50E 57.00 1.83 Oil Elgin PUQ Platform Mineral 0.0352 tonnes Turbines, Pumps etc. -

Pump Failure UKCS/1918 25/11/2016 60-20N: 04-02W 60.33 -4.03 Chemical Schiehallion Central MEG/Water mixes,RX- 1.5605 kg Subsea Intervention - Water Inj 9022, RX 5248 Pressure Testing UKCS/1652 25/11/2016 59-16N: 01-30E 59.27 1.50 Chemical Harding Platform Erifon 818 v2 22.5 kg Conductor Tensioner - Seal Failure UKCS/1653 27/11/2016 58-02N: 01-08E 58.03 1.13 Chemical Britannia Platform Transaqua HT2 5 kg Hydraulics - Open System - Fittings / Connections UKCS/1658 27/11/2016 60-18N: 04-20W 60.30 -4.33 Chemical Foinaven - FPSO Oceanic HW540 v2 10 kg Hydraulics - Open Petrojarl System - Fittings / Connections UKCS/1666 27/11/2016 58-11N: 01-07E 58.18 1.12 Chemical Beauly Well 16/21c-32Y Pelagic 100 Production 1217.86 kg Subsea Pipelines - Control Fluid Pipework Failure UKCS/1654 28/11/2016 57-11N: 01-54E 57.18 1.90 Chemical Maersk Highlander Potassium Chloride 1000 kg Chemical Bunkering Brine Hose - Total Rupture UKCS/1655 28/11/2016 57-11N: 00-59E 57.18 0.98 Chemical Gannet A Platform DMO86101 1.96 kg Chemical Injection - Small Bore Fittings UKCS/1656 28/11/2016 53-34N: 03-27W 53.57 -3.45 Chemical Hamilton A Platform Oceanic HW 540E (no 106 kg Hydraulic dye) Manifold/Control Panel - Small Bore Fittings UKCS/1657 29/11/2016 53-40N: 03-32W 53.67 -3.53 Chemical Douglas OSI Oceanic HW540 E 2 kg Hydraulics - Closed system - Accumulator Failure UKCS/1659 02/12/2016 60-08N: 03-55W 60.13 -3.92 Chemical Transocean Spitsbergen V2 Pelagic Glycol 890 kg BOP (Subsea) - POD Failure UKCS/1660 03/12/2016 60-41N: 02-32W 60.68 -2.53 Oil Clair Phase 1 Platform Hydraulic 0.0017 tonnes Storage Tanks etc. - Bund Overflow / Open UKCS/1661 04/12/2016 53-19N: 02-34E 53.32 2.57 Oil Inde AT Platform Condensate 0.002 tonnes Pipework - Pinhole (PERENCO) Leak UKCS/1662 04/12/2016 58-13N: 01-06E 58.22 1.10 Chemical Balmoral FPV EC1544A 3.65 kg Chemical Injection - Small Bore Fittings UKCS/1663 05/12/2016 57-17N: 01-39E 57.28 1.65 Oil Marnock ETAP PDR Hydraulic 0.00008 tonnes Valves - Valve Failure Platform UKCS/1664 05/12/2016 57-00N: 01-50E 57.00 1.83 Oil GSF Galaxy I Diesel 0.03 tonnes Diesel Bunkering Hose - Total Rupture

UKCS/1665 06/12/2016 57-05N: 00-50E 57.08 0.83 Oil Gannet A Platform Crude 0.000658 tonnes Subsea Pipelines - Pinhole Leak UKCS/1667 06/12/2016 61-37N: 01-18E 61.62 1.30 Oil Magnus Platform Engine oil 0.002 tonnes Fire Pump - Bund Overflow UKCS/1668 06/12/2016 61-05N: 01-43E 61.08 1.72 Oil Brent C Platform Oily water 0.00013 tonnes Drains System - Overflow of Deck Drains UKCS/1669 07/12/2016 61-21N: 01-09E 61.35 1.15 Oil Eider Platform Engine oil 0.02125 tonnes Turbines, Pumps etc. - Failure of Equipment UKCS 07/12/2016 58-52N: 01-31E 58.87 1.52 Chemical Devenick Manifold Castrol Transaqua HT2 1747 kg Hydraulics Open /1908 System-SCM Failure UKCS/1670 08/12/2016 54-03N: 02-04E 54.05 2.07 Oil Schooner A Platform Diesel 0.25 tonnes Diesel Systems - Failure of Equipment UKCS/1671 09/12/2016 53-11N: 02-51E 53.18 2.85 Oil Sean PD Platform Hydraulic 0.2 tonnes Hydraulic Manifold/Control Panel - Small Bore Fittings UKCS/1672 10/12/2016 61-40N: 01-22E 61.67 1.37 Oil Paul B Lloyd Jnr Crude 0.0576 tonnes Well - Small Subsea Release from Well UKCS/1673 10/12/2016 58-02N: 01-08E 58.03 1.13 Chemical Britannia subsea Castrol Transaqua HT2 153 kg Hydraulics - Open manifold System - Umbilical Rupture UKCS/1681 10/12/2016 56-48N: 00-42E 56.80 0.70 Chemical Ensco 100 Anvol CF 22 60.72 kg Pipework - Small Bore Fittings UKCS/1674 11/12/2016 60-41N: 02-32W 60.68 -2.53 Chemical Clair Phase 1 Platform Baradril-N 1 kg Spill - During Manual Operations UKCS/1676 11/12/2016 54-34N: 02-17E 54.57 2.28 Chemical Cygnus A PU Platform Methanol 2.37 kg Drains - Water Based Chemicals UKCS/1675 13/12/2016 58-21N: 00-52E 58.35 0.87 Chemical Donan FPSO Global Castrol Transaqua HT2 1600 kg Hydraulics - Open Producer III System - SCM Failure (Otherwise unspecified) UKCS/1677 13/12/2016 53-50N: 00-26E 53.83 0.43 Oil Rough BD Platform Diesel 0.00111 tonnes Well - Annular Communication UKCS/1907 14/12/2016 60-19N: 04-06W 60.32 -4.10 Chemical Deepsea Aberdeen Erifon HD603HP (No 7.78 kg BOP (Subsea)- Dye), Mono Ethylene Hydraulic Fitting

Glycol UKCS/1678 16/12/2016 53-19N: 02-14E 53.32 2.23 Oil Ganymede 49/22-ZD Hydraulic 0.0026 tonnes Cranes - Hydraulic Platform System UKCS/1679 16/12/2016 60-48N: 01-27E 60.80 1.45 Chemical Ninian Southern Enviromul Mud System 1 kg Hose (Topsides, Not Platform Bunkering) - Hose Parted from Coupling / Break Away Coupling UKCS/1680 17/12/2016 58-25N: 00-20E 58.42 0.33 Chemical Saltire A Platform Pelagic 100 Production 1810 kg Subsea Chemical Control Fluid Systems - Valve Failure UKCS/1682 19/12/2016 58-18N: 01-46W 58.30 -1.77 Oil Captain WPP'A' Lubrication 0.00455 tonnes Hose (Topsides, Not Bunkering) - Hose Failure UKCS/1683 20/12/2016 57-05N: 00-53E 57.08 0.88 Oil Guillemot West(Triton) Crude 0.0303 tonnes Rupture in crude cooler FPSO vessel UKCS/1684 20/12/2016 56-21N: 02-03E 56.35 2.05 Chemical Auk A Platform Castrol Transaqua HT2 1144 kg Chemical Injection - Valve Failure UKCS/1685 20/12/2016 60-19N: 04-05W 60.32 -4.08 Chemical Deepsea Aberdeen Erifon HD603HP (No 9 kg BOP (Subsea) - Dye) Hydraulic Fitting UKCS/1686 21/12/2016 61-06N: 01-04E 61.10 1.07 Oil Cormorant A Platform Oily Waste 0.005 tonnes Pipework - Pinhole Leak UKCS/1696 25/12/2016 57-11N: 01-54E 57.18 1.90 Chemical Maersk Highlander Soda Ash; Caustic Soda; 3042.3 kg Sand Traps - Valve M-I GEL; M-I WATE Failure (All Grades); POLYPAC - All Grades; DUO-VIS UKCS/1687 26/12/2016 61-06N: 01-04E 61.10 1.07 Oil Cormorant A Platform Crude 0.005 tonnes Pigging System - Seal Failure UKCS/1689 27/12/2016 60-54N: 01-25E 60.90 1.42 Chemical Ninian Northern Emulsotron CC3443-G 430 kg Spill - Knocked Over / Platform Dropped UKCS/1688 28/12/2016 54-35N: 02-11E 54.58 2.18 Chemical Cygnus B Platform Versaclean LTOBM 0.25 kg Hose (Topsides, Not Bunkering) - Pinhole Leak UKCS/1690 29/12/2016 58-02N: 00-43E 58.03 0.72 Oil Sedco 712 Unknown 0.0000000 tonnes Diesel Bunkering Hose

1 - Residue on Hose UKCS/1691 30/12/2016 58-13N: 01-06E 58.22 1.10 Chemical Balmoral FPV Pelagic 100 Production 174.22 kg Hydraulics - Open Control Fluid System - SCM Failure (Otherwise unspecified) UKCS/1692 31/12/2016 57-22N: 01-59E 57.37 1.98 Oil Mungo Production Hydraulic 0.112756 tonnes Hydraulic Manifold Manifold/Control Panel - Small Bore Fittings UKCS/1693 31/12/2016 60-48N: 01-44E 60.80 1.73 Oil Alwyn North NAA Diesel 0.006448 tonnes Diesel Bunkering Hose Platform - Hose Parted from Coupling / Break Away Coupling UKCS/1694 31/12/2016 58-21N: 00-52E 58.35 0.87 Chemical Global Producer III Castrol Transaqua HT2 900 kg Hydraulics - Closed system - Valve Failure

KNOWN THIRD REPORTS (source identified but not directly related to oil and operations)

Reference Incident Position Latitude Longitude Category Source Incident Type Incident Incident Comments Date (Dec) (Dec) Amount Units UKCS/1698 04/02/2016 57-17N: 01-39E 57.28 1.65 Oil MSV Bourbon Monsoon Hydraulic 0.001 tonnes Release from Vessel UKCS/1699 23/02/2016 56-11N: 02-47E 56.18 2.78 Oil MV Deep Arctic Mineral 0.00436 tonnes Release from Vessel UKCS/1700 01/04/2016 59-52N: 01-23E 59.87 1.38 Oil Viking Neptun Hydraulic 0.002 tonnes Release from ROV UKCS/1701 04/04/2016 57-22N: 01-22E 57.37 1.37 Oil MSV Brage Trader Diesel 0.00018 tonnes Release from Vessel UKCS/1702 09/04/2016 58-06N: 00-41E 58.10 0.68 Oil DSV Deep Arctic Hydraulic 0.00028 tonnes Release from ROV UKCS/9028 11/04/2006 60-18N: 04-16W 60.30 -4.27 Oil Subsea Viking Hydraulic 0.05 tonnes Release from Vessel UKCS/1748 09/05/2016 60-22N: 04-06W 60.37 -4.10 Oil MSV Olympic Hydraulic 0.0000023 tonnes Release from Vessel Challenger 5 UKCS/1703 09/05/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.004 tonnes Release from ROV Challenger UKCS/1704 12/05/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.00484 tonnes Release from ROV Challenger UKCS/1749 13/05/2016 59-53N: 01-16E 59.88 1.27 Oil OCV North Sea Giant Hydraulic 0.0005 tonnes Reease from ROV UKCS/1705 16/05/2016 56-46N: 00-42E 56.77 0.70 Oil MSV Normand Oceanic Hydraulic 0.00086 tonnes Release from ROV UKCS/1706 21/05/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.00264 tonnes Release from ROV Challenger

UKCS/1707 21/05/2016 56-45N: 00-42E 56.75 0.70 Oil MSV Skandi Neptune Hydraulic 0.00175 tonnes Release from ROV UKCS/1708 27/05/2016 60-44N: 02-29W 60.73 -2.48 Oil DCV Thialf Diesel 0.0000003 tonnes Release from Vessel 4 UKCS/1709 29/05/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.001275 tonnes Release from ROV Challenger UKCS/1750 01/06/2016 59-39N: 00-54E 59.65 0.90 Oil ROVSV Sevan Pacific Hydraulic 0.000436 tonnes Release from ROV UKCS/9026 04/06/2016 53-37N: 00-47E 53.62 0.78 Oil MSV Seven Prince Hydraulic 0.0005 tonnes Release from RMOV UKCS/1710 05/06/2016 60-24N: 04-03W 60.40 -4.05 Oil MSV Olympic Hydraulic 0.00534 tonnes Release from ROV Challenger UKCS/1711 05/06/2016 59-55N: 01-17E 59.92 1.28 Oil OCV North Sea Giant Hydraulic 0.005 tonnes Release from ROV UKCS/1712 05/06/2016 60-22N: 04-01W 60.37 -4.02 Oil Normand Subsea Hydraulic 0.0035 tonnes Release from ROV UKCS/1751 09/06/2016 53-43N: 02-01E 53.72 2.02 Oil MSV Kommandor Hydraulic 0.0074 tonnes Release from ROV UKCS/1752 11/06/2016 53-32N: 02-00E 53.53 2.00 Oil MSV Kommandor Hydraulic 0.0074 tonnes Release from ROV UKCS/1753 13/06/2016 53-40N 01-55E 53.67 1.92 Oil MSV Kommondor Hydraulic 0.0074 tonnes Release from ROV UKCS/1713 13/06/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.00002 tonnes Release from ROV Challenger UKCS/1714 16/06/2016 60-35N: 01-18E 60.58 1.30 Oil MSV Seawell Hydraulic 0.00876 tonnes Release from ROV UKCS/1715 17/06/2016 60-24N: 04-03W 60.40 -4.05 Oil MSV Olympic Hydraulic 0.00009 tonnes Release from ROV Challenger UKCS/1716 19/06/2016 58-03N: 01-04E 58.05 1.07 Oil MSV Stril Odin Lubrication 0.001 tonnes Release from Vessel UKCS/9027 19/06/2016 60-35N: 01-18E 60.58 1.30 Oil Seawell Hydraulic 0.01 tonnes Release from Subsea Equipment UKCS/1717 22/06/2016 60-21N: 04-04W 60.35 -4.07 Oil Viking Neptun Hydraulic 0.0002 tonnes Release from ROV UKCS/1925 23/06/2016 53.34N: 01-58E 53.57 1.97 Oil MV Kommandor Hydraulic 0.001 tonnes Release from Vessel UKCS/1718 23/06/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.0005736 tonnes Release from ROV Challenger 84 UKCS/1719 23/06/2016 56-46N: 00-42E 56.77 0.70 Oil MSV Skandi Neptune Hydraulic 0.0026 tonnes Release from ROV UKCS/1720 27/06/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.00528 tonnes Release from ROV Challenger UKCS/1721 02/07/2016 60-18N: 04-16W 60.30 -4.27 Oil MSV Normand Subsea Hydraulic 0.0002 tonnes Release from ROV UKCS/1722 03/07/2016 53-50N: 00-26W 53.83 -0.43 Oil MV Ocean Vantage Lubrication 0.009483 tonnes Release from Vessel UKCS/1723 03/07/2016 58-02N: 01-02E 58.03 1.03 Oil Mtanker Amundsen Crude 0.005 tonnes Release from Vessel Spirit UKCS/1725 04/07/2016 60-18N: 04-16W 60.30 -4.27 Oil MSV Norman Subsea Hydraulic 0.00001 tonnes Release from ROV

UKCS/1724 05/07/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.0000095 tonnes Release from ROV Challenger 61 UKCS/1726 06/07/2016 60-18N: 04-16W 60.30 -4.27 Oil Normand Subsea Hydraulic 0.00005 tonnes Release from ROV UKCS/1727 14/07/2016 59-16N: 01-30E 59.27 1.50 Oil DSV Edda Freya Hydraulic 0.016 tonnes Release from ROV UKCS/1729 17/07/2016 61-37N: 01-18W 61.62 -1.30 Oil RSV Caledonian Vision Oil 0.00431 tonnes Release from ROV UKCS/1754 22/07/2016 57-11N: 01-49E 57.18 1.82 Oil Fugro Saltire MV 46 oil 0.017 tonnes Release from Subsea Equipment UKCS/1745 01/08/2016 57-28N: 00-30E 57.47 0.50 Oil DSV Deep Arctic Hydraulic 0.0000575 tonnes Release from ROV UKCS/1730 02/08/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.0036333 tonnes Release from ROV Challenger 32 UKCS/1731 03/08/2016 53-36N: 02-29E 53.60 2.48 Oil Deep Helder Hydraulic 0.000704 tonnes Release from ROV UKCS/1732 10/08/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Viking Neptun Hydraulic 0.00002 tonnes Release from ROV UKCS/1733 13/08/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.0009561 tonnes Release from ROV Challenger 4 UKCS/1734 21/08/2016 56-46N: 00-42E 56.77 0.70 Oil MSV Normand Oceanic Hydraulic 0.000055 tonnes Release from ROV UKCS/1735 26/08/2016 56-23N: 02-15E 56.38 2.25 Oil MSV Maersk Achiever Hydraulic 0.002925 tonnes Release from ROV UKCS/1738 26/08/2016 60-21N: 04-30W 60.35 -4.50 Oil MSV North Sea Atlantic Hydraulic 0.00044 tonnes Release from ROV UKCS/1736 27/08/2016 60-21N: 04-04W 60.35 -4.07 Oil MSV Olympic Hydraulic 0.00466 tonnes Release from ROV Challenger UKCS/1755 30/08/2016 60-51N: 01-28E 60.85 1.47 Oil Edda Flora Hydaulic 0.0006 tonnes Release from ROV UKCS/9024 07/09/2016 60-44N: 02-09W 60.73 -2.15 Oil MSV Caledonian Lubrication 0.0000018 tonnes Release from Vessel Victory 8 UKCS/1744 08/09/2016 61-37N: 01-18E 61.62 1.30 Oil DSV Bibby Topaz Hydraulic 0.00001 tonnes Release from ROV UKCS/1737 13/09/2016 58-25N: 00-19W 58.42 -0.32 Oil MSV Seawell Hydraulic 1.3 kg Release from ROV UKCS/1923 15/09/2016 61-37N: 01-18E 61.62 1.30 Oil Bibby Topaz DSV Hydraulic 0.0000212 tonnes Release from vessel UKCS/1746 04/10/2016 58-27N: 00-15E 58.45 0.25 Oil FS Arundel Diesel 0.00225 tonnes Release from Supply Vessel UKCS/1742 10/10/2016 60-21N: 04-30W 60.35 -4.50 Oil North Sea Atlantic Hydraulic 0.00044 tonnes Release from ROV UKCS/1743 11/10/2016 56-46N: 00-42E 56.77 -0.07 Oil Subsea 7 Vessel Hydraulic 0.01 tonnes Release from ROV (Unknown) UKCS/1739 29/10/2016 57-10N: 00-49E 57.17 0.82 Oil Skandi Olympia Hydraulic 0.0002 tonnes Release from ROV UKCS/1740 10/11/2016 60-21N: 04-04W 60.35 -4.07 Oil Normand Subsea Hydraulic 0.0005 tonnes Release from ROV UKCS/1741 15/12/2016 60-18N: 04-16W 60.30 -4.27 Oil MT Petroatlantic Crude 0.00431 tonnes Release from Vessel

*ONGOING RELEASES 2016.

Reference Incident Position Latitude Longitude Category Source Incident Type Incident Incident Comments Date (Dec) (Dec) Amount Units 05/01/2008 53-05N : 02-07W 53.08 0.00 Oil Leman AD1 Platform Condensate 0.049 tonnes Release from AP vent [SHELL] system 19/05/2010 53-49N : 00-28E 53.82 -0.03 Oil Rough AP Platform Hydraulic 0.195222 tonnes Downhole equipment failure PON1/453 24/06/2011 60-37N : 01-39E 60.62 -0.05 Chemical Nuggest N1 Completion Oceanic HW 443 0.292 kg Subsea hydraulic control system. UKCS/1349 28/04/2013 60-37N : 01-39E 60.62 -0.05 Chemical Jura WHPS 2 Oceanic HW443 R 3.432 kg Leak operating Xmas tree valve. UKCS/1350 03/05/2014 60-51N : 01-28E 60.85 -0.03 Chemical Ninian Central Platform Oceanic HW540 v2 39,192.30 kg Failure of SSIV hydraulic system UKCS/1374 14/05/2014 58-17N : 00-12E 58.28 -0.02 Chemical Scott JU Platform EC6202A; Ammonium 0.755359 kg Leak from water Bisulphite 65%; injection system. FOAMTREAT 943; OS15; Sodium Hypochlorite 14-16% UKCS/1488 09/07/2014 57-15N : 00-48E 57.25 -0.07 Chemical Guillemot, Teal FPSO Castrol Brayco Micronic 11.73 kg Release from injection Anasuria sv/3 wing valve. UKCS/1517 29/07/2014 57-08N : 01-59E 57.13 -0.08 Chemical Scoter Subsea Methanol (all grades) 8,553.26 kg Failure of subsea Completion umbilical. UKCS/1201 01/01/2015 57-48N : 00-58W 57.80 0.08 Chemical Buzzard Utilities EC6198A; ROCLEAN 225.116 kg Entrained Chemicals - Platform P303; RoClean L211f; Water Injection - Leak PermaClean PC-11; PermaTreat PC-191; Nalco 7408 UKCS/1380 03/06/2015 57-58N : 01-51E 57.97 -0.08 Chemical Armada Platform TRANSAQUA HT2N 6,420 kg Hydraulics - Open System - Fittings / Connections UKCS/1472 05/08/2015 60-03N : 03-58W 60.05 0.08 Oil Solan Platform Unknown 0.00212 tonnes Sheen Observed - Unknown Source UKCS/1499 20/08/2015 60-51N : 01-28E 60.85 -0.03 Chemical Strathspey Manifold Oceanic HW540 v2, 213,088.80 kg Hydraulics - Open Oceanic HW540 E System - Fittings /

Connections UKCS/1741 18/09/2015 58-18N: 01-45W 58.30 -1.75 Chemical Captain WPP'A' Oceanic HW540E 2,755 kg Hydraulics- Open- System SCM Failure UKCS/1615 02/11/2015 58-25N : 00-15W 58.42 0.02 Chemical Claymore South WI OSW85797, Sodium 8.51 kg Entrained Chemicals - Template hypochlotrite with Water Injection - Leak copper ions generated in siu UKCS/1661 19/12/2015 61-29N : 01-27E 61.48 -0.03 Chemical Don SW&W Don Castrol Transaqua HT2 300 kg Hydraulics - Open Northern Producer System - Fittings / Connections UKCS/1662 19/12/2015 58-17N : 00-12E 58.28 -0.02 Chemical Scott JD Platform Chemical 1: EC6202A, 2.702119 kg Entrained Chemicals - FOAMTREAT 943, Water Injection - Leak OS15, Sodium Hypochlorite 15%, Ammonium Bisulphite 65% UKCS/1668 29/12/2015 53-50N : 00-26W 53.83 0.03 Oil Rough CD Platform Unknown 0.000118 tonnes Sheen observed - unknown source * The rollover ongoing incidents listed commenced and were initially recorded during a previous reporting year. As a result they have not been recorded as a new incident to provide a true reflection of the fluids released to sea during the calendar year. However, the quantity released during the current calendar year has been taken into account within the overall statistical analyses to provide a true reflection of fluids released to sea during the calendar year.

UPDATE TO PREVIOUS REPORT (not included in annual statistics). UKCS/1597 19-Oct- 60-51N : 01-28E 60.85 -0.03 Oil Ninian Central Platform Crude 7.24 tonnes Process control upset 2015

12: UKCS VESSEL DISCHARGES Reference Incident Position Latitude Longitude Category Incident Incident Incident Source Comments Date Type Amount Units UKCS/1800 27/02/16 58-02N: 01-24E 58.04 1.4 Other Nk 0.000001 tonnes Unknown Reported by the Andrew installation. UKCS/1802 21/03/16 56-29N: 02-09E 56.48 2.15 Oil Nk 0.0123 tonnes Unknown Reported by the Fulmar installation. UKCS/1803 22/03/16 56-29N: 02-09E 56.48 2.15 Oil Nk 0.02214 tonnes Unknown Reported by the Fulmar installation. UKCS/1804 30/03/16 57-01N: 01-57E 57.02 1.95 Oil Diesel 0.05 tonnes Unknown Reported by the Shearwater installation. UKCS/1814 20/04/16 57-41N 01-10E 57.68 1.17 Oil Nk 0.0001 tonnes Unknown Reported by Nelson installation. UKCS/1805 14/06/16 59-16N: 01-30E 59.27 1.5 Oil Nk 0.1 tonnes Unknown Reported by the Harding installation. UKCS/1806 15/06/16 56-43N: 01-18E 56.72 1.3 Oil Nk 0.0005 tonnes Unknown Reported by the Curlew FPSO. UKCS/1815 22/07/16 58-13N: 01-06E 58.22 1.1 Oil Nk 0.03075 tonnes Unknown Reported by Balmoral installation. UKCS/1807 28/07/16 57-17N: 01-39E 57.28 1.65 Oil Nk 0.0002 tonnes Unknown Reported by the Marnock-ETAP installation. UKCS/1808 17/08/16 58-02N: 01-02E 58.04 1.03 Oil Nk 1.8 tonnes Unknown Reported by the Alba FSU installation. UKCS/1816 23/08/16 57:22N: 01-22E 57.37 1.37 Oil Nk 0.1 tonnes Unknown Reported by Arbroath installation. UKCS/1817 25/08/16 56-57N: 01-48E 56.95 1.8 Oil Nk 0.000000002 tonnes Unknown Reported by Rowan Gorilla V installation. UKCS/1809 05/09/16 57-57N: 00-54E 57.95 0.9 Oil Nk 0.00048 tonnes Unknown Reported by the Golden Eagle installation. UKCS/1818 07/09/16 56-57N: 01-48E 56.95 1.8 Oil Nk 0.000000002 tonnes Unknown Reported by the West Franklin installation. UKCS/1810 02/10/16 61-16N: 01-35E 61.27 1.58 Oil Crude 0.8164 tonnes Unknown Reported by the Dunlin installation. UKCS/1811 15/10/16 56-29N: 02-09E 56.48 2.15 Oil Nk 0.1 tonnes Unknown Reported by the Fulmar installation. UKCS/1812 27/11/16 57-27N: 01-23E 57.45 1.38 Oil Nk 0.616 tonnes Unknown Reported by the Montrose installation.

APPENDIX 2

SURVEY GUIDELINES AND QUESTIONNAIRE

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 United Kingdom’s Exclusive Economic Zone (UKEEZ), 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]