NORD STREAM GAS PIPELINE CONSTRUCTION AND OPERATION IN THE FINNISH EEZ

Transcription

1 Intended for Nord Stream AG Document type Environmental monitoring report Q3/2011 Date NORD STREAM GAS PIPELINE CONSTRUCTION AND OPERATION IN THE FINNISH EEZ ENVIRONMENTAL MONITORING Q3/2011

2 NORD STREAM GAS PIPELINE CONSTRUCTION AND OPERATION IN THE FINNISH EEZ ENVIRONMENTAL MONITORING Q3/2011 Revision A Date 2012/01/13 Made by Ari Hanski, Eeva-Maria Hatva, Heikki Surakka, Antti Miettinen Checked by Sakari Salonen, John Adams Tore Granskog Approved by Environmental monitoring report Q3/2011 Ref Revision Record: Revision Date Description Made by Checked by Approved by Draft Ari Hanski, Sakari Salonen Tore Granskog Eeva-Maria Hatva, Sakari Salonen, Heikki Surakka, John Adams Antti Miettinen A Final Ramboll Säterinkatu 6 PL ESPOO Finland T F

3 CONTENT 1. SUMMARY INTRODUCTION GENERAL BACKGROUND PERMITS AND MONITORING Construction and operational permits granted Notifications Monitoring CONSTRUCTION ACTIVITIES DURING Q3/ PRE-COMMISSIONING (PIPELINE 1) COMMISSIONING (PIPELINE 1) LIFT AND SHIFT OF MUNITIONS PIPELAY (PIPELINE 2) ROCK PLACEMENT (PIPELINE 1 AND 2) MONITORING ACTIVITIES PRE-COMMISSIONING (PIPELINE 1) HYPERBARIC TIE-IN (PIPELINE 1) LIFT AND SHIFT OF MUNITIONS PIPELAY (PIPELINE 2) Seabed morphology and pipeline Wrecks, barrels and existing infrastructure ROCK PLACEMENT (PIPELINE 1 AND 2) Seabed morphology LONG TERM WATER QUALITY AND CURRENT MONITORING SHIP TRAFFIC ENVIRONMENTAL CONDITIONS MONITORING RESULTS AND DISCUSSION HYPERBARIC TIE-IN (PIPELINE 1) LIFT AND SHIFT OF MUNITIONS PIPELAY (PIPELINE 2) Seabed morphology and pipeline Wrecks, barrels and existing infrastructure Chance findings and unplanned events ROCK PLACEMENT (PIPELINE 1 AND 2) Seabed morphology HELCOM LONG TERM MONITORING STATIONS LONG TERM WATER QUALITY MONITORING Currents Water quality SHIP TRAFFIC PRELIMINARY CONCLUSIONS REFERENCES... 44

4 APPENDICES 1 Map of Nord Stream construction activities during Q3/ Map of Nord Stream monitoring stations during Q3/ Rock placement data table 4 Water quality monitoring report: Long term water quality monitoring 5 List of monitoring equipment

5 List of abbreviations and definitions ADCP Acoustic Doppler Current Profiler cm centimetre CTD Conductivity, Temperature, Depth DP Dynamically Positioned EEZ Exclusive Economic Zone EIA Environmental Impact Assessment E/I Electrical and instrumentation FMI Finnish Meteorological Institute FNBA Finnish National Board of Antiquities FNU Formazin Nephelometric Units FTU Formazin Turbidity Unit GoF Gulf of Finland GOFREP Gulf of Finland Mandatory Reporting System GVI General Video Inspection h hour HAFI Gazprom gas conditioning unit at Russian landfall HELCOM Baltic Marine Environment Protection Commission HIPPS High integrity pressure protection system HRE Heating and pressure reduction unit KP Kilometre Point l litre m metre m 3 cubic metre MBES Multibeam Echosounder mg milligram N Nitrogen NGO Non-governmental organisation nm nautical mile NTU Nephelometric Turbidity Unit O 2 Oxygen P Phosphorus PHF Pipe handling frame Pig Pipeline Inspection Gauge PSV Pipe Supply Vessel ROV Remotely Operated Vehicle s second SYKE Finnish Environment Institute TDM Touch Down Monitoring (pipeline) TSS Traffic Separation Scheme Q1 First quarter of a year from 1 st January to 31 st March Q2 Second quarter of a year from 1 st April to 30 th June Q3 Third quarter of a year, from 1 st July to 30 th September Q4 Fourth quarter of a year, from 1 st October to 31 st December µg microgram

6 1 1. SUMMARY This report presents the results and preliminary findings of the environmental monitoring of the Nord Stream construction activities in the Finnish EEZ for the third quarter of Ramboll Finland Oy has prepared this Q3/2011 report, based on the reports and the data received from Nord Stream and their contractors. The findings presented are preliminary. The final conclusions from the monitoring during 2011 will be presented in the annual monitoring report in April/May Construction activities during Q3/2011 included: Pre-commissioning (dewatering, drying and nitrogen filling) for Pipeline 1 which started during Q2/2011 and continued until 28 th August Commissioning works for Pipeline 1 in the Finnish EEZ which started on 5 th September The activity involved displacement of nitrogen by introducing natural gas into the pipeline and pressurization of the pipeline. Post-lay rock placement (phase 3) for Pipeline 1 which was performed between 21 st July and 25 th August For Pipeline 2 post-lay rock placement (phase 2) was performed during 2 nd 3 rd August The total amount of rock material placed was 22,755 m 3. Pipelay of Pipeline 2 which was carried out by the DP lay barge Solitaire from KP 157 to KP 297 between 1 st July and 11 th August 2011.The anchored lay barge Castoro Sei laid a section of Pipeline 2 from KP 417 to KP 498 between 1 st and 26 th July Pipelay operations for Pipeline 2 in the Finnish EEZ were completed during Q3/2011. During the surveys of the abandonment and recovery areas in the curved sections of the route of Pipeline 2, prior to pipelay, three munitions were found at approximately KP 180 (see Q2/2011 report). These munitions were relocated through lift and sift operation on 2 nd July Construction activities were monitored in the Finnish EEZ during Q3/2011 except precommissioning and commissioning works. Summer 2011 was warmer than the long term average. Occasional heavy thunder storms were typical on the northern coast of the Gulf of Finland. One stormy day was registered in the middle of September in Utö. Here, windy days were also more common during the month of September than at the stations in the Gulf of Finland. During Q3/2011 phase 3 post-lay rock placement was performed at the tie-in site. Following the works, the second debris inspection survey was carried out at the site. Debris was found at 6 of 32 previously identified locations. The remaining 26 locations were located under the post-lay rock berm. At two of these 6 locations a total of 13 sand bags were found and recovered onboard the survey vessel. Three munitions (F50, F51 and F52) found in the abandonment and recovery area within the security corridor of Pipeline 2 in Q2/2011 were relocated successfully through lift and shift operation. Their new locations are approximately 30 m south of the design route of Pipeline 2. Prior to the installation of Pipeline 2 the design route was modified in three locations to ensure that: Known munitions were at least 25 m from the pipeline route (KP 333 and between KP 321 to KP 323), thereby reducing the number of munitions that had to be cleared.

7 2 A separation of approximately 7 m between the upstream and downstream pipe ends at the hyperbaric tie-in location could be achieved Section 1 from KP 123 to KP 297 of Pipeline 2 was laid by Solitaire within the installation accuracy. The average offline distance is 0.84 m. The pipeline was installed within the design tolerance across the pre-lay rock berms. Section 2 from KP 297 KP 351 of Pipeline 2 was laid by Solitaire within the installation accuracy. The average offline distance is 0.73 m. Pipeline 2 between KP 351 and KP 498 was installed by Castoro Sei within the installation accuracy. The average offline distance of this section is 1.33 m. For a distance of 186 m between KP and KP the pipeline deviated outside of the installation corridor with a maximum deviation of m (north of the design route). This deviation occurred in the curved section close to the Estonian/Finnish EEZ boundary. Neither the pipelay activity of Pipeline 2 nor the pipeline itself had any effects on seven wrecks (S , S , S , S , 08-S-20, S and S ). A comparison of still images for two wrecks (S and S ) taken prior to and after pipelay revealed minor changes in some features. However, according to an assessment of the anchoring operations of the lay barge, these changes are not considered to be related to the anchoring activities. The findings have been discussed with and preliminarily confirmed by the FNBA (National Board of Antiquities). Pipelay had no impacts on the chance find wreck (08-S-20) located 2.8 m from the outer edge of Pipeline 2 (i.e. 3.5 m from the centreline) at KP Due to the proximity of the wreck to the Pangea Seg 3 cable crossing at KP it was not possible to achieve the target offset of 5 m between the design route and the wreck. Post-lay surveys were performed for three barrels (R-E6E-10505, R and R ) located within the installation corridor of Pipeline 2. The comparison between pre- and post-lay survey data indicated no change in the condition or position of the barrels. At the cable crossings for nine cables (FEC-2, EE-SF2, Pangea Seg 3 (at KP 219), Unknown cable (at KP ), Unknown cable (at KP ), EE-SF3, Estlink, FEC-1, Pangea Seg 3 (at KP 442) and EE-S1) along Pipeline 2, the pipeline was laid over the mattresses within the specified lay tolerances. The pipeline was partly in freespan over a mattress at a cable crossing for the Pangea Seg 3 at KP 442. At the crossing of the Pangea Seg 3 at KP 219 the pipeline has moved laterally, causing minor disturbance to the mattress arrangement. When attempting to achieve the target offset to the wreck 08-S-20. The cable owner has been notified of the event. A total of 22,465 m 3 of rock material was placed at 26 locations for Pipeline 1 and 290 m 3 at 3 locations for Pipeline 2. The heights and footprints of the constructed berms will be determined and reported after the whole activity (all different phases) is finished. Long-term monitoring results of currents during summer 2011 in the western (CONTROL1) and eastern (CONTROL2) parts of the Gulf of Finland corresponded well with the earlier results that had been obtained. Turbidity was low and oxygen level good or tolerable in seawater above the seabed. No incidents, chance findings or unplanned events were reported during Q3/2011.

8 3 2. INTRODUCTION 2.1 General Nord Stream AG is constructing an offshore pipeline system to transport natural gas from Russia to Germany through the Baltic Sea. The route starts in Vyborg, Russia, and passes through the Gulf of Finland and the Baltic Proper and makes landfall at Greifswald in Germany. The pipeline route passes through the Exclusive Economic Zones (EEZ) of Russia, Finland, Sweden, Denmark and Germany and enters the territorial waters of Russia, Denmark and Germany. The total capacity of the two pipelines will be 55 billion m 3 /year. The total length of the pipeline is 1,224 km of which 375 km (KP ) passes through the Finnish EEZ. The average water depth of the section in the Finnish EEZ is approximately 88 m and the pipeline route is situated km from the Finnish coastline. Works in the Gulf of Finland started in late 2009 with the clearance of munitions along the pipeline route. The pipelay commenced in Sweden on 6 th April 2010 and entered the Finnish EEZ on 27 th June The construction period for the gas pipelines is estimated to last for approximately 1.5 years each in the Finnish EEZ. Seabed intervention works along the route, including both pre-lay and postlay activities, are carried out in campaigns throughout the entire construction phase. Pre-lay activities for both pipelines took around four months including the tie-in basement at KP 297. Post-lay rock placement will continue until autumn Activities will take place both before and after pressure testing of the pipelines. Pipelay of both pipelines was completed on 11 th August 2011 in the Finnish EEZ. Commissioning works for Pipeline 1 started on 5 th September The pipeline system is designed to operate for at least 50 years. In accordance with the granted Water Permit (no. 4/2010/4) Nord Stream is responsible for environmental monitoring and reporting during the construction and operation of the pipeline. Monitoring and reporting of the data collected is performed by Nord Stream and their contractors. Ramboll Finland Oy as environmental consultant is preparing the quarterly and annual environmental monitoring reports covering the construction and operation phases. Ramboll monitoring reports are based on the reports and the data received from Nord Stream and their contractors. This third quarterly report of 2011 presents the environmental monitoring results and preliminary estimations of the effects of pipeline construction activities in the Finnish EEZ between July- September. The final conclusions from the environmental monitoring activities during 2011 will be presented in the annual monitoring report that summarises all monitoring results. 2.2 Background To optimise the route for the gas pipelines and to minimise environmental effects, an extensive assessment programme was carried out during the years During the years an environmental impact assessment (Espoo Report) was made, covering the entire length of the pipeline. As part of the permitting process, the section of the proposed pipeline route in the Finnish EEZ was assessed separately as a national EIA. The Finnish national EIA was delivered to the relevant authorities on the 6 th March 2009 and on the 2 nd July the coordinating authority, the Uusimaa Regional Environment Centre (since 2010 named Uusimaa Centre for Economic Development, Transport and the Environment (here referred to as Uusimaa ELY- Centre)), issued a statement that the document fulfilled the requirements of the Finnish EIA legislation. Further assessments were submitted in response to the additional requirements of the EIA statement and project changes in the permitting process after the submission of the EIA.

9 4 2.3 Permits and monitoring Construction and operational permits granted On the 5 th November 2009 the Council of State granted an approval (No. 678/601/2009) to exploit the Finnish Exclusive Economic Zone for the construction of the pipeline (exploitation right) in accordance with regulations in the exploitation right consent. The decision was in its entirety enforceable regardless of appeals, unless otherwise decided by the appellate authority. Immediate enforcement made it possible to proceed with the Water Permit on the basis of the Finnish Water Act. The Council of State consent is lawful and binding. On the 12 th February 2010, the Southern Finland Regional State Administrative Agency granted a Water Permit (No. 4/2010/4) to Nord Stream AG for the construction and operation of the Russia/Germany submarine natural gas pipeline in the Finnish EEZ. The permit with immediate enforcement allowed Nord Stream AG to proceed with the construction works before the permit legally entered into force, on the condition that Nord Stream AG would issue a security deposit of 70 million Euros. In spring 2010 the Uusimaa section of the Finnish Association for Nature Conservation together with eight Estonian NGOs and three private persons appealed against the construction permit to the Vaasa Administrative Court. The decision for the appellants was negative. In autumn 2010 three Estonian NGOs lodged an appeal to the decision given by the Vaasa Administrative Court (ESAVI/28/04.09/2010) to the Supreme Administrative Court. The appeal was rejected by the Supreme Administrative Court on the 23 rd June The decision given by the Vaasa Administrative Court was not changed and is binding. With its decision (No. 83/2009/2) on 2 nd October 2009, the Western Finland Environmental Permit Authority granted Nord Stream AG a permit for clearing munitions in the Finnish EEZ with immediate enforcement. The permit is lawful and binding Notifications This chapter deals with the notifications given by Nord Stream AG to the Uusimaa and Southwest Finland ELY-Centres related to construction changes and commencement of works according to the permit provisions of the Water Permit (No. 4/2010/4). All notifications submitted by the end of September 2011 are included. All notifications submitted before 17 th June 2011 in accordance with the provisions of the munitions clearance permit and the provisions on munitions clearance included in the Water Permit are listed in the final monitoring report on munitions clearance /8/ and its addendum /9/. Notifications for monitoring issues in accordance with the permit provision 32 of the Water Permit are presented at the end of the next chapter. Notifications on construction changes before Q3/2011 In accordance with permit provisions 6 and 10 of the Water Permit two notifications were submitted in 2010 (22 nd April and 25 th June) regarding design changes to rock berms including rock placement at the hyperbaric tie-in location /10, 11/. Relevant authorities were notified of minor route changes according to permit provision 1 of the water permit on 19 th May 2010 /12/. The route changes at KP 326 and KP 334 along Pipeline 1 and at KP 322 and KP 334 along Pipeline 2 were carried out to avoid clearance of munitions. On 1 st December 2010 the Uusimaa ELY-Centre was notified of changes on the treatment and discharge of the water used in pre-commissioning, in accordance with permit provision 15 of the Water Permit /13/. The notification was specified on 4 th February The following changes were notified for Section 2: 1) the water used to fill the pipeline is treated only with sodium bisulphite, not with sodium hydroxide, 2) the water used in cleaning and gauging (approx. 2,560 m 3 ) in front of and between four pigs (pipeline inspection gauges) is only filtered, not treated with sodium bisulphite and sodium hydroxide, and is discharged at KP 297, not transferred to land and 3) the pressure test water (approx. 5,000 m 3 ) is only filtered, not treated with sodium

10 5 bisulphite and sodium hydroxide, and is discharged at KP 297, not at KP 0. The Uusimaa ELY- Centre approved the proposed changes on 3 rd March Nord Stream AG had stated within the Water Permit application that construction activities will not be conducted during the winter ice period as e.g. the Solitaire is not ice class. On 16th January 2011 the company updated the authorities about the status of pipelay activities due to the emerging winter ice period. The plan was to continue laying of Pipeline 1 up to KP 297, while maintaining close monitoring of the ice situation. The estimated duration of the remaining pipelay was 6-8 days and the ice class pipe supply vessels would be used to maintain open ice, if the Solitaire encountered ice flows. /97/ With reference to permit provision 7 of the Water Permit a notification was submitted on 25 th February 2011 on planned rock placement works during March-April 2011 along Pipeline 1 /14/. An assessment of the possible impacts on seals due to rock placement activities and of the mitigation measures to reduce impacts on seals was attached to the notification. An update to the assessment was submitted on 18 th March together with the notification for the commencement of phase 2 post-lay rock placement for Pipeline 1 /15, 16/. The Uusimaa ELY- Centre in its statements on 22 nd March and 6 th April 2011 approved the proposed rock placement works with certain conditions related to the ice status and monitoring activities. On 18 th April 2011 Nord Stream AG notified the relevant authorities of a change to the precommissioning plan that pressure test water (4,700 m 3 of filtered, untreated sea water) for Section 1 (from KP 297 to Russian landfall) of Pipeline 1 would be discharged into the sea at KP 297 /17/. The original plan was to discharge the pressure test water into the sea near the Russian landfall. Nord Stream AG specified the technical description of the hyperbaric tie-in activities at KP 297, in accordance with permit provision 15 of the Water Permit, on 18 th May 2011 /18/. The notification introduced the use of synthetic bags containing sand or gravel to infill the local unevenness of the rock berm in the vicinity of the pipe handling frames (PHFs) used to align the pipeline ends for the tie-in operation. The Uusimaa ELY-Centre approved the amendment with certain provisions. In accordance with permit provision 21 of the Water Permit Nord Stream AG notified relevant authorities of the identification of three new munitions and their shift to a new location on 17 th June 2011 /19/. The details were supplemented on 1 st July 2011 /20/. Three munitions in the security corridor of Pipeline 2 at KP 180 were found during the surveys of Abandonment & Recovery areas at curved sections. Notifications on construction changes during Q3/2011 The details for lift and shift operation for munitions found were supplemented on 1 st July 2011 (see above). Commencement notifications before Q3/2011 Nord Stream AG has submitted notifications on the commencement of works in accordance with permit provision 34 of the Water Permit. In 2010, seven commencement notifications were submitted concerning: 1) Pre-lay rock placement, mattress installation and pre-lay survey, notification submitted on 25 th March 2010 /98/ 2) Mattress installation, submitted on 28 th March and 22 nd June 2010 /99, 100/ 3) Rock placement, submitted on 6 th April 2010 /101/ 4) Pipelay and surveys related to pipelay, submitted on 22 nd June, 21 st July and 8 th October 2010 / / On 18 th March 2011 a notification of the commencement of phase 2 post-lay rock placement along Pipeline 1 was submitted /16/. Works were planned to start on 24 th March 2011 and be completed during April Altogether 27 rock berms with a total volume of 29,643 m 3 rock

11 6 material were to be constructed with assistance of an ice breaker and additional seal monitoring (see Section 2.3.3). On 5 th May 2011 Nord Stream AG notified relevant authorities on the commencement of the hyperbaric tie-in works for Pipeline 1 /21/. According to the submitted plans, the hyperbaric tie-in works were to be carried out during May The same day a notification of the commencement of Pipeline 2 construction activities including information and time schedules of pipelay by two lay barges, post-lay rock placement, mattress installation for the Unknown cable at KP 234 and the hyperbaric tie-in works at KP 297 was submitted /22/. The description of the pipelay activities also contained information on anchoring patterns to be submitted to relevant authorities. Two notifications on the commencement of rock placement activities were submitted during Q2/2011. Firstly, with reference to the notification on rock placement works submitted on 18 th March, Nord Stream AG notified relevant authorities on 6 th May 2011 of the construction of ten additional phase 2 rock berms (5,462 m 3 in total) to prevent the in-service buckling of the pipeline (movement of the pipeline during operation phase) /23/. The work already started in April 2011 on two berms. The construction of the rest of the berms was to be started on 9 th May 2011 and to be completed in the summer Secondly, a notification on the construction of fifteen phase 3 rock berms (8,279 m 3 in total) was submitted on 29 th June 2011, referring also to permit provision 7 of the water permit /24/. The rock placement activity was to be carried out between 15 th and 31 st July Commencement notifications during Q3/2011 Nord Stream AG notified the relevant authorities on 29 th August of the commencement of commissioning of Pipeline 1 /105/. According to the plans, the activity was to be commenced during September and to be completed in October Monitoring The "Baltic Sea Natural Gas Pipeline Environmental Monitoring Programme Finland (rev C2)" /1/ for construction and operation of the pipelines within the Finnish EEZ, was approved by decision No. 4/2010/4 of the Southern Finland Regional State Administrative Agency on 12 th February The programme has been developed with the following objectives: To monitor that the pipeline is installed in accordance with the national permit conditions To confirm that the pipeline construction does not cause impacts not previously identified or does not have greater impacts than predicted To provide a basis for corrective actions, where required To document the recovery of the environment after construction To monitor that significant environmental effects will not be caused during operation To verify the findings in the permit application documents, including the modelling results used to predict environmental impacts The "Monitoring Programme for Munitions Clearance in Phase 2 Finland" is attached to this programme in Appendix 4. In addition, a separate Monitoring Programme for Munitions Clearance Finland was prepared for the munitions clearance in phase 1 and approved by decision No. 83/2009/2 of the Western Finland Environmental Permit Authority on 2 nd October Based on lessons learned during munitions clearance in 2009 and minor project changes after decision No. 83/2009/2 and No. 4/2010/4, proposals for specifying the monitoring programmes Monitoring Programme for Munitions Clearance Finland and Baltic Sea Natural Gas Pipeline Environmental Monitoring Programme Finland were submitted to the Uusimaa and Southwest Finland ELY-Centres on 21 st April Furthermore, notifications according to permit provisions including implications to monitoring programmes were made to the ELY-Centres during the works

12 7 in The Uusimaa ELY-Centre has approved the proposed changes in a letter dated 4 th June 2010 and a letter dated 23 rd June Revision E of the Baltic Sea Natural Gas Pipeline Environmental Monitoring Programme - Finland /2/ and the revision G of the Monitoring Programme for Munitions Clearance Finland /3/ accommodate the approved changes. In addition, a "Transboundary Monitoring Programme Finland" /4/ for the monitoring of transboundary effects in the Estonian EEZ was prepared and approved by Consent No. 71 of the Estonian Ministry of Foreign Affairs on 7th June Monitoring results from the approved programmes for munitions clearance /3/ and /5/ and transboundary monitoring into the Estonian EEZ related to munitions clearance based on /4/ are presented in a separate report Nord Stream Munitions clearance in the Finnish EEZ, Final monitoring results on Munition by munition basis /8/ and the addendum thereto /9/. According to the permit (No. 4/2010/4) provision number 32: The permit holder must monitor the project's effects on the state of the marine environment, and the recovery of the conditions. Monitoring must be carried out according to the monitoring programme (version C2, dated 8 February 2010) included as a supplement to the application. The monitoring plan may be further specified in the way accepted by the Uusimaa and Southwest Finland Centres for Economic Development, Transport and the Environment, provided that the changes to the plan do not weaken the reliability of the results or the coverage of the monitoring. In addition to what has been stated in the monitoring programme, the permit holder must monitor how the zinc dissolving from the corrosion protection zinc anodes affects the quality of the water and the seabed, and the biota at one zinc anode, as approved by the Uusimaa Centre for Economic Development, Transport and the Environment. Moreover, a one-off, measuring-based review must be carried out on the currents near the seabed in the vicinity of the pipelines. The monitoring programme and the review programme must be submitted to the Uusimaa Centre for Economic Development, Transport and the Environment by 30 June The results and summary of the monitoring must be submitted to the respective Centres for Economic Development, Transport and the Environment of Uusimaa, Southwest Finland, and Southeast Finland; the respective environmental protection authorities of the cities of Länsi- Turunmaa, Espoo, Hanko, Helsinki, Raasepori, Loviisa and Porvoo, and of the municipalities of Kemiönsaari, Inkoo, Kirkkonummi, Siuntio, Sipoo, Kökar, and Lemland annually by the end of February, and every quarter during the construction phase, and, when required, the results and summary must be presented to those whose rights or interests they may concern. Any unexpected events and findings are to be reported immediately. According to the letter from Uusimaa ELY-Centre dated the 4 th June 2010, during the construction of the pipeline quarterly reports must be delivered to the authorities in English within two months after the end of each quarter. Finnish and Swedish versions should be delivered three months after the end of the quarter. Uusimaa ELY-Centre has approved a change in the annual reporting schedule during the construction phase on the 7 th February Accordingly the report is to be submitted to the relevant authorities by the end of April of the subsequent year in English, and by the end of May in Finnish and Swedish. Notifications on monitoring before Q3/2011 Nord Stream AG submitted the proposals for monitoring the effects of zinc released from one sacrificial anode, and the one-off measurement based assessment of the bottom close currents to the Uusimaa and Southwest Finland ELY-Centres on 26 th June The Uusimaa ELY-Centre

13 8 approved the programme for the one-off measurement based study of the bottom close currents in the vicinity of the pipelines on 7 th February The Uusimaa ELY-Centre has also approved the proposal for monitoring the effect of zinc on the environment that is released from one sacrificial anode. Certain conditions accompany the approval relating to the proposed implementation of the monitoring activity and the reporting results. The approval was received on the 29 th April A proposal to amend the water quality monitoring methods at VOHE3 monitoring station during post-lay rock placement was submitted on 18 th March 2011 /16/. Further information for the proposal was supplemented on 24 th March 2011 /25/. The reason for the amendments was to improve reliability of the monitoring by lengthening the measuring period and by collecting data on prevailing currents. The Uusimaa ELY-Centre approved the proposed amendments on 24 th March On 25 th February 2011 Nord Stream AG submitted a proposal to amend the monitoring programme by adding visual observations of seals during the Phase 2 post-lay rock placement in March-April 2011 /14/. The monitoring proposal was updated and submitted on 18 th March based on the updated assessment on the possible impacts on seals /15, 16/. The Uusimaa ELY-Centre approved the updated proposal with certain additions on 6 th April The ELY- Centre requested that seal observation data shall be provided to the Finnish Game and Fisheries Research Institute and included in its entirety in the Q1/2011 monitoring report /6/. A notification was submitted on 25 th March 2011 on identifying a possible unknown cable at KP 234 as a chance find /26/. On 19 th May 2011 Nord Stream AG submitted a proposal to specify the monitoring programme based on the recommendations of the annual monitoring report 2010 /27/. Firstly, benthos monitoring was proposed to continue using a box corer type sampler instead of a van Veen sampler because the van Veen sampler is more sensitive to weather conditions. The Uusimaa ELY-Centre stated on 13 th June 2011 that van Veen sampler should still be used primarily, but the box corer type sampler can be used as necessary due to weather conditions. Secondly, the list of barrels to be monitored was proposed to be changed because: 1) two new barrels were found at KP 168 and KP 303, 2) one barrel was assessed to be a mine anchor, 3) two barrel targets were found to be one and the same and 4) there was no need for monitoring of the barrels having a risk category of 0 or 1. The Uusimaa ELY-Centre approved the changes to barrel monitoring on 13 th June Thirdly, the list of wrecks to be monitored was also updated, as the distance of some of the wrecks from the pipeline was quite far. On 13 th June 2011 the Uusimaa ELY-Centre approved the proposed changes to pre-lay surveys of wrecks, but stated that the post-lay surveys of all the wrecks included in provision 13 of the Water Permit and the chance find wreck at KP (see below) are required. Nord Stream AG proposed on 20 th May 2011 to change the location of the monitoring station for bottom close currents from KP 216 to KP to improve the reliability of current measurement results /28/. The Uusimaa ELY Centre approved the change on 13 th June Nord Stream AG notified relevant authorities of a new chance find wreck found at KP on 10 th June 2011 and proposed to include the wreck in the monitoring /29/. The Uusimaa ELY- Centre approved the inclusion on 13 th June In relation to the new munitions presented in Chapter 2.3.2, Nord Stream AG proposed on 17 th June 2011 to amend the monitoring programme as follows: 1) prior to the shift the munitions will be inspected visually by an ROV and 2) after the shift the munitions will be inspected visually and their coordinates will be defined by using ROV /19/. In addition to the notifications on monitoring to the ELY Centres, Nord Stream AG has submitted information related to wrecks to the FNBA as requested in permit provisions 11 and 12 of the Water Permit. The plan for pipeline installation near the wreck S as well as anchoring plans for the wrecks S , S , S and S were provided to the Finnish National Board of Antiquities on 23 rd June 2010 /106/.

14 9 Notifications on monitoring during Q3/2011 No monitoring notifications were submitted during the Q3/2011 period. Construction activities and impact targets In the table below the construction activities and the related monitoring targets are presented according to the Baltic Sea Natural Gas Pipeline Environmental Monitoring Programme Finland /2/ and the proposed changes approved thereafter. The table also includes the monitoring related to the operations phase that starts already during the construction phase, such as monitoring of a sacrificial anode and HELCOM benthos monitoring stations. Activity Rock Placement Mattress installation Impact target Seabed morphology, water quality and currents, cultural heritage, debris, existing infrastructure, sediment, benthos, HELCOM stations, commercial shipping and fishing, seals Position of cable and condition of constructed crossings Pipelay 1 Pre-commissioning Hyperbaric tie-in Lift and shift of munitions 2 Dredging (in Russia) 3 Pipeline on the seabed 4 Anodes 5 Seabed morphology, water quality, cultural heritage, debris, existing infrastructure, commercial shipping and fishing Commercial shipping and fishing Commercial shipping and fishing, sand bags Munitions, commercial shipping and fishing Water quality (transboundary impact) Small scale currents, HELCOM benthos stations Water quality, sediment and benthos 1 Includes anchor handling and thrusters wash 2 Related to Pipeline 2 in Reported in the annual report 2010 /7/ 4 Small scale current monitoring results will be reported separately 5 Anode monitoring has not commenced yet

15 10 3. CONSTRUCTION ACTIVITIES DURING Q3/2011 Nord Stream s construction activities in the Finnish EEZ during Q3/2011 included the completion of pre-commissioning and the start of commissioning activities for Pipeline 1, post-lay rock placement for both pipelines, completion of pipelay operations for Pipeline 2 and lift and shift of three munitions (Figures and Appendix 1). The implemented activities and the schedules described are based on information received from Nord Stream. Quarter Q3/2011 Q4/2011 Month July August September Activity Week Pipeline 2 Pipeline 1 Pre-commissioning Post-lay rock placement Commissioning Anchored lay barge Pipelay DP lay barge Lift and shift of munitions Post-lay rock placement Figure 3.1 Construction activities during Q3/2011

16 11 Figure 3.2 Locations of construction activities during Q3/ Pre-commissioning (Pipeline 1) Pre-commissioning activities for Pipeline 1 carried out mainly in Q2/2011 continued during Q3/2011 by dewatering, drying and nitrogen filling. Dewatering took place at the Russian landfall starting from 19 th /20 th June /30, 31/. It was completed on 19 th July OMS Pollux tracked the dewatering pigs from the German landfall to the Russian landfall. After the dewatering activity Pipeline 1 was dried by means of compressed air from temporary air compressor stations between 23 rd July and 11 th August. Following drying the whole pipeline was filled with inert gas (nitrogen) to allow subsequent gas filling operations. Nitrogen filling took place from 22 nd August to 28 th August. /95/ 3.2 Commissioning (Pipeline 1) The commissioning of the natural gas pipeline can commence when the pipeline is dewatered, dried and filled with nitrogen. Commissioning operations consist of the nitrogen displacement phase (first phase gas-in operation) and pressurization of the pipeline i.e. packing of natural gas (second phase gas-in operation). The first phase gas-in operations of Pipeline 1 started on 5 th September 2011 by pressurizing the connecting line between the HAFI unit (Gazprom gas conditioning unit) and HRE (Heating and pressure reduction unit) at the Russian landfall. The filling of the offshore section of the pipeline

17 12 with natural gas started on 6 th September. Natural gas was introduced from Russia displacing the nitrogen, which was vented in Germany. The nitrogen displacement was completed after 3.5 days, when natural gas in the pipeline had reached the required concentration level at the German landfall. /32, 33/ The second phase gas-in operations of Pipeline 1 started immediately after the nitrogen displacement by closing the vent line in Germany and by continuing gas injection from the Russian landfall so that pressure could be built up in the pipeline. In order to complete outstanding construction works (for example electrical and instrumentation installations and finalization of HIPPS (High integrity pressure protection system)), pressurization was interrupted for a period starting from 21 st September. The commissioning activity continued until Q4/2011 and the rest of the works will be reported in Q4/2011 monitoring report. /32, 33/ The operations were conducted and controlled at the landfall facilities and monitored from the main control centre in Zug, Switzerland. /33/ 3.3 Lift and shift of munitions Prior to the installation of Pipeline 2, gradiometer surveys of the abandonment and recovery areas along the curved sections of the route were performed by the vessel Edda Freya. These areas outside the installation corridor were surveyed, because the pipelay vessel Solitaire may have unexpectedly needed to lay down the pipeline in these areas along the curved sections of the route. During the surveys, three previously undetected small objects were found at approximately KP 180. These objects were preliminarily identified as munitions of the type 155 mm naval shells with an estimated charge weight of 8-10 kg (Table 3.1, see also Chapter of the Q2/2011 report) /34, 35/. Table 3.1 Data of the additional munitions identified /36, 37/ NSP ID Initial munition type Initial charge weight [kg TNT] Date of survey F mm naval shell F mm naval shell F mm naval shell The locations of the munitions F50, F51 and F52 identified are shown in Figure 3.2. As they were located within the security corridor of Pipeline 2, they had to be relocated. This lift and shift operation was performed on 2 nd July 2011 by the vessel Edda Freya /37/. The 'Munitions Clearance Ordnance Removal Plan' for the three additional munitions was prepared by Bactec International Ltd /36/. The plan concluded that clearance by lifting and shifting the objects with a dedicated ROV to a new location outside the security corridor of Pipeline 2 would be a safe method to remove the munitions. The operation was performed by MMT, under the supervision of a Bactec EOD engineer on 2 nd July The relocation was carried out according to the following procedure /37/: The munition was visually inspected with an ROV. Prior to relocation of the munition the transfer route and the designated relocation area were surveyed with an ROV mounted MBES. The munition was collected by a shovel attached to the ROV manipulator arm and relocated to the designated location south of the security corridor, while the vessel maintained a safe stand-off distance.

18 Pipelay (Pipeline 2) In the pipelay process, individual pipe sections are transported by pipe supply vessels (PSVs) to the lay barge, welded together on board and lowered as a continuous string onto the seabed from the lay barge. In the Finnish EEZ the Nord Stream pipelines were installed by two different pipelay vessels. An anchored lay barge, Castoro Sei, laid the section between KP 351 and KP 498 for both pipelines (Figure 3.3). Solitaire, a dynamically positioned (DP) lay barge that does not require anchors for positioning, laid the remaining section between KP 123 and KP 351 for both pipelines (Figure 3.4). The use of a DP lay barge ensures additional safety especially in congested areas and where anchoring can be difficult. Figure 3.3 Anchored lay barge Castoro Sei

19 14 Figure 3.4 Dynamically positioned lay barge Solitaire Solitaire continued laying Pipeline 2 from KP 157 in the beginning of July 2011 and completed her share of Nord Stream's pipelay operations on 11 th August 2011 by reaching the hyperbaric tie-in location at KP 297 (Figure 3.2) /30, 38/. Pipelay was interrupted on two occasions for planned maintenance, on 17 th July at KP 214 and 2 nd August at KP 264 /39/. Castoro Sei continued laying Pipeline 2 from KP 417 in the beginning of July 2011 and reached the Swedish EEZ border at KP 498 on 26 th July 2011 (Figure 3.2) /30/. Thereby, pipelay operations for Pipeline 2 in the Finnish EEZ were completed during Q3/2011. Pipelay was interrupted on one occasion due to poor weather conditions for approximately 14 hours on 24 th July at KP 494 /39/. During that day strong winds (average speed >14 m/s) were prevailing in the western Finnish waters (see Chapter 5 - Storms and strong winds). 3.5 Rock placement (Pipeline 1 and 2) Rock placement refers to local placement of coarse gravel and cobbles on the seabed to provide support for the pipeline. It is performed to secure the integrity of the pipeline in the long term. The aim is to avoid excessive freespans and overstressing of the pipeline, and to ensure its dynamic stability. Rock placement is carried out in three phases: 1) before pipelay (phase 1 prelay rock placement), 2) after pipelay and before pre-commissioning (phase 2 post-lay rock placement) and 3) after pre-commissioning (phase 3 post-lay rock placement). The rock material placed on the seabed is unweathered granite with an average particle size of 50 mm ranging from 20 to 100 mm. Rock material has been transported and placed on the seabed by dynamically positioned fall-pipe vessels (DPFVs). During Q3/2011 post-lay rock placement was performed on both pipelines. For Pipeline 1 phase 3 post-lay rock placement was carried out at 26 locations from 21 st July to 25 th August 2011 including the berm at the hyperbaric tie-in location (Figure 3.5, Appendix 1). Phase 2 post-lay

20 15 rock placement for Pipeline 2 was started, and rock material was placed at three locations on 2 nd and 3 rd August The rock placement at the hyperbaric tie-in was conducted by DPFV Seahorse, while DPFV Sandpiper performed the rest of the rock placement works. The DPFVs transported the rock material from Kotka, Finland. /40, 30, 38/ Figure 3.5 Locations of rock placement during Q3/2011 The total amount of rock material placed during Q3/2011 was 22,755 m 3, of which 22,465 m 3 was for Pipeline 1 and 290 m 3 for Pipeline 2 (Table 3.2 and Appendix 3) /40/. Table 3.2 Rock placement works during Q3/2011 (see Appendix 3 for details) /40/ Pipeline Phase No. of berms KP, km Mass, Te Volume, m 3 * ** 297 5,913 3, *** ,133 18, Total ,498 22,755 * Volume = Mass / 1.56 ** Berm at the hyperbaric tie-in location *** Includes nine ISB berms that are installed to prevent in-service buckling (In-service buckling berms are required to limit horizontal or vertical movement of the pipeline during operation that could lead to localised movement resulting in permanent damage to the pipeline)

21 16 4. MONITORING ACTIVITIES This chapter describes the environmental monitoring activities performed during Q3/2011. Monitoring targets and stations during Q3/2011 are presented in Table 4.1, Figure 4.1 and Appendix 2. A list of the equipment used is presented in Appendix 5. Monitoring activities have been conducted according to the monitoring programme /2/ and changes approved thereafter (Chapter 2.3.3) unless stated otherwise. Table 4.1 Monitoring activities during Q3/2011 Monitoring targets and stations during Q3/2011 Target Location / station Activity Water quality* CONTROL1 long term monitoring CONTROL2 long term monitoring all rock placement Seabed morphology locations rock placement pipeline pipelay Munitions R R Lift and shift operation R Sand bags and other debris KP 297 Hyperbaric tie-in Wrecks S S-20 S S S pipelay (post-lay) S S S S Barrels R-E6E R pipelay (post-lay) R Cable crossings FEC-01 FEC-02 Pangea Seg 3 KP 442 and KP 219 EE-S1 EE-SF2 EE-SF3 Estlink Unknown KP Unknown KP pipelay (as-left) * Small scale current monitoring was performed at CUR1 station between 20th May and 1st July. The activity and results will be presented in a separate report on the one-off measurement based study of the bottom close currents (Chapter 2.3.3).

22 17 Figure 4.1 Monitoring locations of long term water quality, seabed morphology, munitions, debris at tie-in, wrecks, barrels and cable crossings during Q3/2011. Rock placement locations are presented in Figure 3.5 in chapter Pre-commissioning (Pipeline 1) During the dewatering of Pipeline 1 at the Russian landfall, discharge water and sea water quality was monitored on a daily basis. Sea water samples were taken at four locations, 100 m and 500 m from the discharge point. Parameters such as salinity, ph, oxidation-reduction potential, dissolved oxygen and metals were measured and analysed from the samples. Dewatering in Russia is not part of monitoring in Finland. Results of the monitoring of dewatering in Russia have been reported in Russian environmental monitoring report. /31/ 4.2 Hyperbaric tie-in (Pipeline 1) After the hyperbaric tie-in operation of Pipeline 1 at KP 297 a debris inspection survey was performed on 7 th July 2011 to assess the number and location of sand and gravel bags and other debris items left in place after the hyperbaric tie-in works. The results of this first debris inspection survey were previously reported in the Q2/2011 monitoring report. The phase 3 post-lay rock placement works were completed at the hyperbaric tie-in location at KP 297 on 16 th August 2011 /40/. After that, on 18 th August, a second debris inspection survey was performed to determine the number and distribution of debris items remaining exposed on

23 18 the seabed and subsequently to recover the sand bags that were not covered with rock material /42/. The work was carried out by the vessel Edda Freya. A total of 33 debris locations identified in the first survey on 7 th July were re-inspected visually by an ROV. The sand bags that were not covered with rock material were then recovered by ROV to the vessel. In addition an MBES survey of the entire rock berm at the hyperbaric tie-in location was performed. /42/ 4.3 Lift and shift of munitions Following the relocation of three additional munitions (F50, F51 and F52) from the security corridor of Pipeline 2 to a new position, a 360 visual inspection of each of the munitions and a position fix were carried out with an ROV on 2 nd July Images of the munitions before, during and after the relocation were taken to show the condition of the munitions during different phases of clearance operation (see Figures in Chapter 6). 4.4 Pipelay (Pipeline 2) Prior to pipeline installation the seabed morphology was surveyed with an instrumented ROV along the pipeline installation corridor (pre-lay survey). After pipelay an as-laid survey of the pipeline seabed configuration is performed. Pre-lay surveys for Pipeline 2 between KP 460 and KP 498 were completed in the beginning of June and are reported in Q2/2011 monitoring report /43/. During Q3/2011 the as-laid survey for Pipeline 2 was completed with surveys performed between KP 128 and KP 318 as well as between KP 360 and KP 498 /44-66/. Nine wrecks, three barrels and ten cable crossings were monitored during Q3/2011 (Table 4.1). A lift and shift procedure was performed for three chance finds munitions which were found during Q2/2011. Pipeline touchdown monitoring (TDM) was performed at necessary sections to support pipelay with an instrumented ROV. A summary of the monitoring activities associated with pipelay is presented in Table 4.2. The timing of the monitoring is presented in Table 4.3. More information about the equipment used in monitoring is presented in Appendix 5.

24 19 Table 4.2 Monitoring of pipelay /2/. Numerical values for parameters marked in italic (related to pipe position) will be reported after the whole pipeline has been constructed. Monitoring related to pipelay during Q3/2011 Monitoring target Parameter Unit Method Location Timing Seabed morphology Obstacles Seabed bathymetry Engineering features Pipe position and condition Yes / no, location (E, N) m (depth) per design m (E, N, depth) intact/damaged ROV instrumented with MBES, sonar and video cameras Pre-lay survey Pipeline 2: KP 460 KP 498 As-laid survey Pipeline 2: KP 128 KP 318 KP 360 KP 498 Prior to pipelay (pre-lay survey) After pipelay (as-laid survey) Cultural heritage, barrels and existing infrastructure Position and integrity of cultural heritage Position and integrity of barrels Coordinates, Intact / damage Coordinates, Intact / damage Visual inspection via ROV 9 wrecks 3 barrels 10 cable crossings After pipelay (post-lay survey) Table 4.3 Summary of the timing of the monitoring related to pipelay in Q3/2011. Target Pre-lay survey Post-lay survey Installation corridor / pipeline Pipeline 2: Pipeline 2: KP 128 KP 318 and KP 460 KP 498 KP 360 KP 498 S S * S * S wrecks 08-S S S ** S S R-E6E barrels R R cable crossings FEC EE-SF Pangea Seg 3 (at KP 219)

25 20 Target Pre-lay survey Post-lay survey Unknown cable (at KP ) Unknown cable (at KP ) EE-SF Estlink FEC Pangea Seg 3 (at KP 442) EE-S * No pre-lay survey required (approved by the authorities, see Chapter and /27/) ** Pre-lay survey not performed (see Chapter of Q2/2011 monitoring report /43/) Seabed morphology and pipeline Before pipelay, the pipeline installation corridor was surveyed with an ROV instrumented with MBES, sonar and video cameras (Table 4.4 and Appendix 5) /67/. The pipeline installation corridor survey extends +/- 7.5 m either side of the centre line of the planned pipeline route. All significant targets within the installation corridor were investigated and videos of the targets recorded. The ROV speed was typically maintained between 700 and 900 m/h. During the survey the scanning sonar was operated at a range scale of 20 m, to provide coverage across the installation corridor. The pre-lay surveys performed during Q3/2011 were between KP 460 and KP 498. The timing and KP interval for pre-lay surveys are summarised in Table 4.4. The results of these pre-lays surveys were reported in the Q2/2011 report /43/. After pipelay, as-laid surveys are carried out on a section by section basis. The as-laid survey was undertaken by an ROV equipped with MBES, sonar and video cameras (Appendix 5). The MBES was used to survey 10 m either side of the pipe (pipeline on seabed configuration). Adjacent targets were monitored with sonar. Video cameras were used for visual inspection of the condition of the as-laid pipeline. As part of the as-laid survey, the horizontal and vertical position of the pipeline and magnitude of freespans were measured. The survey also registers any damage to the pipeline coating, anodes and field joints. The ROV speed during survey operations was typically m/h, and did not exceed 1,000 m/h. In addition to as-laid surveys, pipe touchdown monitoring has been intermittently monitored with an ROV /67/. During Q3, as-laid surveys were performed for Pipeline 2 between KP 128 and KP 318 as well as between KP 360 and KP 498. The section from KP 128 to KP 152 was partly surveyed during Q2/2011 but is reported in this Q3 report. The timing and KP interval for the surveys are summarised in Table 4.4. The method and equipment used are described in more detail in the aslaid reports which also include the pipeline alignment charts, "nine point" listings (presenting the configuration of the pipeline with respect to the seabed) and the pipeline events /44-66/. Table 4.4 Pre-lay and as-laid surveys during Q3/2011 /43, 44-66/ Pre-lay and as-laid surveys in the installation corridor during Q3/2011 Survey KP Timing of the surveys Pre-lay survey (Pipeline 2) * * ** ** As-laid survey (Pipeline 2)

26 21 Pre-lay and as-laid surveys in the installation corridor during Q3/2011 Survey KP Timing of the surveys *Pre-lay surveys are reported in Q2/2011 monitoring report. **As-laid survey performed partly during Q2/2011, but reported in this Q3/2011 report Wrecks, barrels and existing infrastructure During Q3/2011 post-lay survey following the installation of Pipeline 2 has been performed for nine wrecks: S , S , S , S , 08-S-20, S , S , S and S (Table 4.3). The locations of the surveyed wrecks are presented in Figure 4.1. /58-76/ The post-lay surveys were conducted between 11 th and 13 th August 2011 using an ROV equipped with cameras in order to collect still images from selected wreck features /68-76/. Based on the comparison of still images from pre- and post-lay surveys the survey contractor concluded whether there had been any impact from the pipelay activities on the wrecks. In the case of six wrecks (S , S , S , S , S and S ) separate pre-lay surveys were not conducted. In these cases the post-lay surveys for Pipeline 1 act as pre-lay survey for Pipeline 2. There are four barrels to be monitored along Pipeline 2 in the Finnish EEZ. Barrel R has been reported in the Q1/2011 report. For the three remaining barrels (R-E6E-10505, R and R ), post-lay surveys were performed during Q3/2011. The locations of the barrels monitored during Q3/2011 are presented in Figure 4.1. /77/ Post-lay surveys of the barrels were performed using an ROV equipped with video cameras on 11 th and 12 th August. The ROV surveyed the barrels in order to confirm position and depth, as well as to examine them from all angles. The sizes of the barrels were determined with two parallel lasers. /77/ Nine cables (FEC-2, EE-SF2, Pangea Seg 3 (at KP 219), Unknown cable (at KP ), Unknown cable (at KP ), EE-SF3, Estlink, FEC-1, Pangea Seg 3 (at KP 442) and EE-S1) cross Pipeline 2 at ten locations (Pangea Seg 3 crosses twice) along the section installed during Q3/2011. At the cable crossings TDM was employed during the pipelay of Pipeline 2. An as-laid

27 22 survey at a cable crossing consisted of MBES and visual surveys from an ROV /78-87/. The asleft surveys of all crossing structures consisted of a general video inspection over the whole crossing structure and MBES survey. In sections where the pipelay was performed by the anchored lay barge Castoro Sei a visual survey 1,000 m either side of the crossing along the cable was also performed /86-87/. The as-left survey was performed using an ROV /78-87/. The locations of monitored wrecks, barrels and cable crossings during Q3/2011 are presented in Figure 4.1 and Appendix 2. Monitoring parameters are presented in Table 4.2. Table 4.3 presents the timing of monitoring activities. 4.5 Rock placement (Pipeline 1 and 2) Monitoring activities undertaken in connection with rock placement included monitoring seabed morphology and possible obstacles on the seabed. The berm locations and amount of rock material placed is reported in Appendix 3 of this report. The design height, and where relevant the as-built footprint of the post-lay rock berms, will be determined once the post-lay rock placement activity is finished The monitoring of rock placement reported in this Q3/2011 report is summarised in Table 4.5. Table 4.5 Monitoring of rock placement /2, 40/. Units marked with italic will be reported in the annual monitoring report. Monitoring related to rock placement during Q3/2011 Monitoring target Parameter Unit Method Location Timing Seabed morphology Obstacles Seabed bathymetry Rock berm per design Yes / no, location (E, N) m (depth) m (height) m 3 (volume) m 2 (footprint) ROV instrumented with MBES, sonar and video cameras 26 locations along Pipeline 1 and 3 locations along Pipeline 2 Prior to post-lay rock placement where relevant Prior to post-lay rock placement After post-lay rock placement Seabed morphology The positioning of the pipeline on the seabed and, where relevant, the pre-lay rock berm were surveyed immediately before the post-lay rock placement with an ROV or fall pipe equipped with a MBES. If the distance between rock berm locations was less than 200 m, then only one integrated survey to inspect the areas was performed. Directly after rock placement the post-lay rock berms were surveyed using the same equipment. The surveys extended 10 m outside the berm footprints. /88/ Before commencement of rock placement the installation corridor of the pipeline (+/- 7.5 m either side of the planned pipeline route) was surveyed with a gradiometer. If the area of any planned rock berms extended wider than this, the survey was performed in a wider area. The volume of rock placed is recorded. The berm height and the footprint are determined by comparing the terrain models developed from the bathymetric data gathered prior to and subsequent to the rock placement works. This comparison will be presented after the rock placement activity is completed.

28 23 The monitoring equipment is listed in Appendix 5 and the methods are described in detail in /89/ and /88/. 4.6 Long term water quality and current monitoring Long term water quality and current monitoring is being carried out at two monitoring stations, CONTROL1 and CONTROL2 (Figure 4.1, Table 4.6) /90/. Table 4.6 Coordinates (in WGS84) of the long term water quality and current monitoring stations CONTROL1-2 /90/. Coordinates of long term water quality and current monitoring stations Station Longitude Latitude CONTROL1 CONTROL2 Long term water quality and current monitoring at CONTROL1 and CONTROL2 stations are performed with ADCP, turbidity sensor, water sampling and CTD profile. CONTROL1 is situated in the western part of the Gulf of Finland at a depth of 43 m and CONTROL2 is situated in the eastern part of the Gulf of Finland at a depth of 47 m. Both stations are situated close to Natura 2000 areas (Figure 4.1). Monitoring equipment for the stations was installed in November 2009, two weeks prior to the commencement of the first munitions clearance phase. Water quality and currents will be monitored throughout the entire construction period. 4.7 Ship traffic Nord Stream has provided notifications to the Border Guard and the Finnish Transport Agency for all vessels prior to entering Finnish Waters. Nord Stream has submitted both monthly forecast reports and monthly reports to the authorities. The vessels have provided weekly and daily progress reports to the relevant authorities. Vessel movements have been monitored by GOFREP. The Finnish Transport Agency has published notices to mariners on project activities. Safety zones to avoid adverse impacts on commercial shipping were established around all construction activities In addition, the intervention, Tug Fairplay 27, stood by to assist commercial shipping whilst Solitaire laid through TSS (Traffic Separation Scene) Kalbådagrund (from 2 nd to 8 th July) and through TSS Porkkala (from 22 nd July to 31 st July).

29 24 5. ENVIRONMENTAL CONDITIONS This chapter provides a concise summary of the weather conditions experienced along the northern coast of the Gulf of Finland and in the Baltic Proper during Q3/2011. The data was provided by the Finnish Meteorological Institute (FMI) /91/. July 2011 was one of the warmest midsummer months of the last 50 years. On the south coast of Finland heavy thunder storms were typical. As with other summer months, August was also warmer than the average (Figure 5.1).The total sum of rainfall during the month however was exceptionally high in Helsinki-Kaisaniemi, approximately twice as high as the long term average (Figure 5.1). The warm weather type, along with occasional heavy showers, continued in September. Rainfall, mm Jan March May July Sep Nov Temperature, C Rainfall Average rainfall Temperature Average Temperature Figure 5.1 Rainfall and air temperature in 2011, measured at the observatory of Helsinki- Kaisaniemi (FMI) /91/. The long term average is based on the period from Wind direction and speed Meteorological stations in the northern Baltic Proper and the Gulf of Finland where wind observations are performed by FMI are shown in Figure 5.2.

30 25 Figure 5.2 Locations of meteorological and hydrographical stations used. Table 5.1 Average wind speeds at the three selected stations during Q3/2011 (FMI) /91/ Average wind speed (m/s) during Q3/2011 Station July August September Utö 5,1 5,7 8,2 Harmaja 4,7 5,5 5,9 Rankki 3,9 4,4 4,8 Easterly winds were prevailing at the selected stations in July Towards late summer and autumn southerly and westerly winds began to dominate at all meteorological stations (Figure 5.3).

31 26 Dominancy of winds in Utö NW W % SW S SE E 0 NE Jan March May July Sep Nov N Dominancy of winds in Harmaja 100 % NW W SW S SE E NE Jan March May July Sep Nov N Dominancy of winds in Rankki 100 % NW W SW S SE E 0 NE Jan March May July Sep Nov N Figure 5.3 Dominant strong wind ( 14 m/s) directions (%) and distribution from different compass points during Q1-3/2011 at the three selected stations (FMI) /91/

32 27 Storms and strong winds Stormy days (average speed >21 m/s) were registered only in Utö on 14 th of September during Q3/2011. Strong winds (average speed >14 m/s) were more common in Utö compared to the stations in the Gulf of Finland (Figure 5.4). Occurrence of strong winds Number of days Jan Apr Jun Aug Oct Dec Rankki Harmaja Utö Figure 5.4 Total number of days of strong winds at the selected meteorological stations in the Finnish waters during 2011 (FMI) /91/ Wave height and sea surface temperature The recorded data of wave height and sea surface temperature during Q3/2011 is shown in Table 5.2. Differences between the two buoys were quite small. In September the range of significant wave heights was the largest. The highest wave heights were recorded in the Northern Baltic Proper. Table 5.2 Data from the two wave buoys in July - September 2011 at the stations of Northern Baltic Proper and Helsinki (see Figure 5.3) Wave buoy location Significant wave height (m) monthly mean (ranges in brackets) Sea water temperature ( C) monthly mean (ranges in brackets) July August September July August September Northern Baltic Proper 0.7 ( ) 0.9 ( ) 1.5 ( ) 18.4 ( ) 19.0 ( ) 16.2 ( ) Helsinki 0.6 ( ) 0.8 ( ) 1.0 ( ) 19.2 ( ) 19.2 ( ) 14.8 ( )

33 28 6. MONITORING RESULTS AND DISCUSSION This chapter describes the main environmental monitoring results during Q3/ Hyperbaric tie-in (Pipeline 1) In total 32 debris locations on the rock berm of the hyperbaric tie-in site were re-inspected during the second debris inspection survey (Table 6.1) following the phase 3 post-lay rock placement. At six of the locations debris items were still visible on the rock berm. At four of these locations the minor debris items were not deemed significant or hazardous and were left in situ. At two of these locations the debris comprised 13 sand bags and they were recovered to the vessel (Figure 6.1). /42/ At 24 locations the debris was covered by rock material. At two locations the debris items (two transponders) had already been removed prior to the second debris inspection survey. /42/ Table 6.1 Summary of the results of the second debris inspection survey at the hyperbaric tie-in site and actions taken /42/ Type of debris No. of debris locations visited Other details Action Sand bag Visible, not covered by rock material 2 Altogether 13 sand bags at two locations (12+1) Recovered to the vessel Covered by rock material 10 - No action, left in situ Other debris Visible, not covered by rock material Covered by rock material Not significant or 4 hazardous 14 - No action, left in situ Transponders, removed prior to the survey 2 1 transponder per each location No action, because already removed Total 32

34 29 Figure 6.1 Recovering a sand bag to the vessel by using an ROV and its function arm /42/ 6.2 Lift and shift of munitions Relevant data of the munitions F50, F51 and F52 relocated are presented in Table 6.2. Table 6.2 Data of the additional munitions relocated /37/ NSP ID KP (C16.5) Final munition type Final charge weight Date of [kg TNT] clearance F mm naval shell F mm naval shell F mm naval shell Based on the images of the munitions F50, F51 and F52 acquired during the relocation operation, Bactec revised the initial identification (see Table 3.1). Munitions were smaller than assessed earlier and were now assessed to be 105 mm projectiles with a charge weight of 2.3 kg. All munitions were successfully shifted approximately 50 m south of their initial position and about 30 m south of the route of Pipeline 2 /37/. The coordinates of the locations of the relocated munitions will be notified to the supervising authorities separately, as the information on locations are classified information. Images of the munitions before, during and after the relocation from the ROV visual inspections on 2 nd July 2011 are shown in Figures 6.2, 6.3 and 6.4, respectively. The dates and times of the visual inspections are given on the images. Before During relocation After Figure 6.2 Images of the munition F50 (R ) before, during and after the relocation /37/.

35 30 Before During relocation After Figure 6.3 Images of the munition F51 (R ) before, during and after the relocation /37/. Before During relocation After Figure 6.4 Images of the munition F52 (R ) before, during and after the relocation /37/. 6.3 Pipelay (Pipeline 2) Seabed morphology and pipeline During Q3/2011 the pre-lay surveys were performed for Pipeline 2 between KP 460 and KP 498. The results of these pre-lay surveys have already been reported in Q2/2011 report /43/. During Q3/2011 the as-laid surveys were performed for Pipeline 2 between KP 128 and KP 318 as well as between KP 360 and KP 498. In this Q3/2011 Report the main as-laid survey findings for Pipeline 2 between KP KP 297, KP 297 KP 351 and KP 351 KP 498 are presented. As-laid pipeline alignment with respect to installation accuracy to Route C16.5 between KP 123 and KP 297 Pipeline 2 between KP 123 and KP was installed by Solitaire within / m of the design route (Figure 6.7) which is within the installation accuracy defined in Water Permit Provision 1. The average offline distance is 0.84 m. The section with the greatest deviation from the design route is between KP 154 and KP 155. This deviation is attributed to the complex route section with an irregular seabed and the optimisation of the pipeline alignment to minimise pipeline freespans. An example of route optimisation due to rock outcrops is presented in Figure 6.5.

36 31 Figure 6.5 Localised route optimization to minimise pipeline freespans The pipeline was installed within the design tolerance across the pre-lay rock berms which were installed in 2010 (Figure 6.6). Figure 6.6 Pipeline installed across the pre-lay rock berms. As-laid pipeline alignment with respect to installation accuracy to Route C16.5 between KP 297 and KP 351 Preliminary results of the installation accuracy of Pipeline 2 from KP 318 to KP 351 have been reported in Q1/2011 monitoring report /6/. Solitaire installed Pipeline 2 Section 2 (KP 297 KP 351) within +2.93/-3.43 m of the design route (Figure 6.7) which is within the installation accuracy defined in Water Permit Provision 1. The average offline distance is 0.73 m. Prior to the installation of Pipeline 2 the design route C16.5 was modified in three locations. To minimise the number of munitions that were required to be cleared within the +/- 25 m security corridor, minor route adjustments were performed at two locations to ensure that known munitions were at least 25 m from the pipeline route /12/. These route adjustments were: From KP to KP the modified alignment C19.4 /93/ From KP to KP the modified alignment C19.3 /94/ From KP the design route C16.5 was modified /92/ to ensure a separation of approximately 7m between the upstream and downstream pipe ends at the hyperbaric tie-in location.

37 Section 1 lay direction Hyperbaric tie-in location Section 2 lay direction Distance Offset from Design Route (m) Finland/Russsia EEZ Border KP 123 lay tolerance of ± 7.5 m on straight sections KP (kilometres) Offset with respect to modified route Minor re-routes C19-3 and C19-4 Figure 6.7 As-laid Pipeline 2 alignment with respect to design from KP 123 to KP 350 As-laid pipeline alignment with respect to installation accuracy to Route C16.5 between KP 351 and KP 498 Pipeline 2 between KP and KP 498 was installed by Castoro Sei within / m of the design route (Figure 6.8) which is within the installation accuracy defined in the Water Permit Provision 1. The average offline distance is 1.33 m. The pipeline deviated once outside of the +/- 7.5 m installation corridor for a pipeline length of 186 m between KP and KP with a maximum deviation of m (north of the design route). This deviation occurred in a curved section close to the Estonian/Finnish EEZ boundary. According to provision 1 of the Water Permit, the pipeline installation tolerance in curved sections is ±15 m Section 2 lay direction Distance Offset from Design Route (m) C6 recovered pipeline installed by Solitaire lay tolerance of ± 7.5 m on straight sections KP to KP (186 m) Pipeline outside +/-7.5m corridor (max. deviation +8.25m, KP ) Finland/Sweedish EEZ Border KP KP (kilometres) Figure 6.8 As-laid Pipeline 2 alignment with respect to design from KP 351 to KP 498

38 33 Pipeline 2 was installed over the pre-lay berm at KP (berm E2012) and the post-lay phase 2 berm was installed prior to the as-laid survey. Figure 6.9 shows the ROV image of the pipeline as it becomes buried under the post-lay rock berm and an image generated from the ROV multibeam bathymetry of the as-installed berm and pipeline. Figure 6.9 Configuration of Pipeline 2 and the rock berm at KP As-laid pipeline profile and freespans The engineering assessment of the as-laid profile of Pipeline 2 is still ongoing. Consequently the assessment of the as-laid pipeline / seabed configuration and the necessary post-lay Phase 2 rock placement will be reported in the Q4/2011 Monitoring Report Wrecks, barrels and existing infrastructure Wrecks During Q3/2011 a post-lay survey was carried out for nine wrecks (S , S , S , S , 08-S-20, S , S , S and S ). Selected still images of prominent features of the monitored wrecks taken prior to, and after the laying of Pipeline 2 are presented in Figures On the basis of the comparison of all the still images from pre- and post-lay surveys, neither the pipelay activity nor the pipeline itself had any impacts upon seven wrecks /68-71, 74-76/. For two wrecks (S and S ), both possibly ketches or similar from 19 th century, differences between the still images from pre- and post-lay surveys were observed. The mast of the wreck S has turned into a more upright position and a sheave block has shifted position (Figure 6.16) /73/. In addition a piece of the stern of the wreck S was partly detached from the wreck (Figure 6.15) /72/. Nord Stream AG conducted a study to assess the anchoring operations of Castoro Sei in the vicinity of these two wrecks /96/. According to the results of the study the observed changes are not considered to be caused by the anchoring of the lay barge. Nord Stream AG has delivered the video data concerning these wrecks to the Finnish National Board of Antiquities, who have confirmed that anchoring is unlikely to have caused the changes. Based on the pre- and post-lay ROV visual inspection survey results the pipelay had no impacts to the chance find wreck (08-S-20) at KP The closest point of the wreck (the aft end) from Pipeline 2 is located approximately 2.8 m from the outer edge of the pipeline /76/ and thus 3.5 m from the centreline of the pipeline. Due to the proximity of the wreck to the Pangea Seg 3 cable crossing (KP ) it was not possible to achieve the target offset of 5 m between the design route and the wreck as stated in the Q2/2011 monitoring report (see Chapter of the Q2/2011 monitoring report /43/).

39 34 Figure 6.10 Still image of the wreck S from pre-lay (left) and post-lay (right) survey. Open access hatch on deck. /68/ Figure 6.11 Still image of the wreck S from pre-lay (left) and post-lay (right) survey. The neck and knob of the cannon's breech. /69/ Figure 6.12 Still image of the wreck S from pre-lay (left) and post-lay (right) survey. Hull. /70/

40 35 Figure 6.13 Still image of the wreck S from pre-lay (left) and post-lay (right) survey. Bow portside. /71/ Figure 6.14 Still image of the wreck 08-S-20 from pre-lay (left) and post-lay (right) survey. Aft end. /76/ Figure 6.15 Still image of the wreck S from pre-lay (left) and post-lay (right) survey. Stern with possible name plate (on the right plate shifted). /72/

41 36 Figure 6.16 Still image of the wreck S from pre-lay (left) and post-lay (right) survey. Block tied to a mast lying on the rail (on the right mast shifted). /73/ Figure 6.17 Still image of the wreck S from pre-lay (left) and post-lay (right) survey. Bow with the bowsprit. /74/ Figure 6.18 Still image of the wreck S from pre-lay (left) and post-lay (right) survey. Rigging detail and deck house behind. /75/ Barrels During Q3/2011, post-lay surveys were performed for three barrels located along Pipeline 2. The monitored barrels were R-E6E-10505, R and R The comparison between pre- and post-lay survey data indicated no change in the condition or position of the barrels, providing the conclusion that they have not been affected by the pipeline installation

42 37 /77/. Selected still images of the monitored barrels prior to and after the pipelay are shown in Figures Figure 6.19 Still image of the barrel R-E6E from pre-lay (left) and post-lay (right) survey. Intact south end of barrel. Pipeline 2 visible on the right image. /77/ Figure 6.20 Still image of the barrel R from pre-lay (left) and post-lay (right) survey. View from a southerly direction. Pipeline 2 visible on the right image. /77/ Figure 6.21 Still image of the barrel R from pre-lay (left) and post-lay (right) survey. End view from southeast. /77/

43 38 Existing infrastructure Ten cable crossings for nine cables (FEC-2, EE-SF2, Pangea Seg 3 (at KP 219), Unknown cable (at KP ), Unknown cable (at KP ), EE-SF3, Estlink, FEC-1, Pangea Seg 3 (at KP 442) and EE-S1) along Pipeline 2 were included in the monitoring through as-laid and as-left surveys. According to the as-laid survey performed for the pipeline at the crossing points and the as-left surveys performed for the crossing structures and cables, the pipeline was laid over the mattress arrangements within the specified lay tolerances (+/-2.5 m) /78-87/. The pipeline was partially in freespan over a mattress at the cable crossing for the Pangea Seg 3 at KP 442 caused by the spoil heaps. The length of the freespan was around 2 m and the height was less than 30 cm /83/. The as-left survey of the Pangea Seg 3 at KP 219 crossing shows that the pipeline has moved laterally when attempting to achieve the target offset to the wreck 08-S-20 (Figure 6.22). This lateral movement of the pipeline has caused disturbance to the mattress arrangement forcing some of the mattresses to move southward. Movement is in the order of 0.9 m. Nord Stream AG has notified the cable owner. Figure 6.22 Lateral movement of Pipeline 2 at Pangea Seg 3 crossing at KP 219. The arrow shows the direction of the movement Chance findings and unplanned events During Q3/2011 no change findings or unplanned events occurred. 6.4 Rock placement (Pipeline 1 and 2) Seabed morphology Seabed morphology at the rock placement sites has been monitored prior to, and after installation of each of the rock berms. No obstacles were found prior to works on the rock placement sites. For Pipeline 1 a total of 22,755 m 3 of rock material was placed in 26 locations and for Pipeline 2 a total of 290 m 3 of rock material in 3 locations. A total of 22,755 m 3 (35,498 tonnes) of rock material was placed during Q3/2011 at 29 locations. As rock placement is performed in several phases, the height and footprint of the constructed rock berm is determined after the rock placement activity has finished. A table presenting the amounts of rock placed in cubic metres per berm is presented in Appendix HELCOM long term monitoring stations The Finnish Environment Institute (SYKE) executed the second field campaign at the HELCOM stations LL5, LL6A and LL7 and at the alternative locations between 11 th and 17 th May The quantitative benthos results for the stations will be included in the Q4/2011 report.

44 Long term water quality monitoring In the following sub-chapters the main cumulative data on baseline water quality and current monitoring at the stations CONTROL1 and CONTROL2 since autumn 2009 is presented. The detailed results are presented in Appendix Currents Current measurements have been carried out during the time-periods 4 th November nd August 2011 (CONTROL1) and 6 th November rd August 2011 (CONTROL2) by ADCP equipment /90/. During the whole of the monitoring period the average current magnitude at CONTROL1 has been around 0.06 m/s in the lowest 10 metre water layer and 0.09 m/s in the uppermost 10 metre layer. At CONTROL2, average current magnitudes increased from 0.05 m/s to 0.08 m/s, when moving from the bottom layer towards the surface. The highest recorded current magnitude in the bottom layer at CONTROL1 has been 0.37 m/s and 0.51 m/s at CONTROL2. /90/ At CONTROL1 the westerly currents were dominating in the surface layer. In the lowermost layer north easterly currents were also typical. At CONTROL2 the south easterly direction was slightly more usual than the other directions, but no distinct dominant direction was recorded (Figure 6.23). Control 1 Control % % % 5% 0% % % % 5% 0% meters - 30 meters above bottom 10 meters - 20 meters above bottom bottom - 10 meters above bottom 30 meters - 40 meters above bottom 20 meters - 30 meters above bottom 10 meters - 20 meters above bottom bottom - 10 meters above bottom Figure 6.23 ADCP data. Current roses for current directions at the CONTROL1 and CONTROL2 stations during November August Percentage values show the prevailing direction of flow during the monitoring period. Direction 360 = 0. /90/ Water quality In the following figures the time series graphs at the stations CONTROL1 and CONTROL2 (Fixed sensors) since the beginning of 2011 for turbidity and dissolved oxygen are presented. The cumulative graphs and the graphs of the other recorded parameters (temperature, salinity) are shown in Appendix 4.

45 40 Turbidity Turbidity remained generally low in the bottom close waters in midsummer 2011 at both stations (Figure 6.24). 50 Turbidity Turbidity [NTU] Control 1, monitoring depth 41m Control 2, monitoring depth 45m Figure 6.24 Fixed sensors. Recorded turbidity (NTU) near the seabed at the CONTROL1 and CONTROL2 stations from the beginning of year During Q3/2011 the stations were recovered on 2nd and 3rd August 2011, respectively. /90/ Oxygen The oxygen situation near the bottom, in July 2011, was good at CONTROL1 station and tolerable at CONTROL2 station (Figure 6.25). Dissolved oxygen Dissolved oxygen [mg/l] Control 1, monitoring depth 41m Control 2, monitoring depth 45m Figure 6.25 Fixed sensors. Recorded oxygen (mg/l) concentrations near the seabed at the CONTROL1 and CONTROL2 stations from the beginning of year 2011 During Q3/2011 the stations were recovered on 2 nd and 3 rd August 2011, respectively. /90/

46 Ship traffic Communication between the authorities and Nord Stream has continued through meetings, reporting and notifications. Nord Stream contracted an intervention tug, Fairplay 27, which stood by to assist commercial shipping whilst Solitaire laid through TSS Kalbådagrund and TSS Porkkala. No incidents were reported.

47 42 7. PRELIMINARY CONCLUSIONS Hyperbaric tie-in (Pipeline 1) After phase 3 post-lay rock placement works at the hyperbaric tie-in location all visible sand bags were recovered to the survey vessel. Lift and shift of munitions Three additional munitions (F50, F51 and F52) were identified in the security corridor of Pipeline 2 during the surveys of the abandonment and recovery areas in the curved sections of the route. These munitions were successfully and safely removed from the security corridor through lift and shift operations prior to installation of the pipeline. Pipelay (Pipeline 2) Pipeline sections of Pipeline 2 in the Finnish EEZ were installed within the installation accuracy. In certain locations some deviation from the design route was necessary to minimise freespans, to ensure minimum distance of known munitions from the pipeline alignment and to ensure a certain separation of the pipe ends at the hyperbaric tie-in site. The pipeline route deviated once outside of the installation corridor, in a curved section, for a pipeline length of less than 200 m between KP and KP close to the Estonian/Finnish EEZ boundary. Yet the installation was within the installation tolerance defined in the Water Permit. The engineering assessment of the as-laid profile of Pipeline 2 is ongoing and will be reported later. Wrecks, barrels and cable crossings Neither the pipelay activity nor the pipeline itself had any effects on seven wrecks (S , S , S , S , 08-S-20, S and S ). Two wrecks (S at KP 391 and S at KP379) had minor changes in some features on the still images taken after pipelay. The time interval between the pre- and post-lay surveys was approximately 10 months. According to an assessment of the anchoring operations of Castoro Sei, the anchoring procedures were followed and no contact with any part of the wreck could have occurred. It is preliminarily concluded that the minor changes observed are not related to the anchoring activities. Pipelay had no impacts on the chance find wreck (08-S-20), which is located approximately 2.8 m from the outer edge of Pipeline 2 (i.e. 3.5 m from the centreline) at KP 219. Three barrels (R-E6E-10505, R and R ), located within the installation corridor of Pipeline 2, have not been affected by the pipeline installation works. At the cable crossings for nine cables (FEC-2, EE-SF2, Pangea Seg 3 (at KP 219), unknown cable (at KP ), unknown cable (at KP ), EE-SF3, Estlink, FEC-1, Pangea Seg 3 (at KP 442) and EE-S1) along Pipeline 2, the pipeline was laid over the mattresses within the specified lay tolerances. The pipeline was partly in freespan over a mattress at cable crossing for the Pangea Seg 3 at KP 442. Slight lateral movement of the pipeline at crossing of the Pangea Seg 3 at KP 219 caused disturbance to the mattress arrangement, when attempting to achieve the target offset to the wreck 08-S-20. Nord Stream AG has notified the cable owner. Rock placement (Pipeline 1 and 2) The total rock volume during Q3/2011 placed along Pipeline 1 at 26 locations was 22,465 m 3 and along Pipeline 2 at three locations was 290 m 3. The heights and footprints of the constructed berms will be determined when the entire activity (different phases) has been finished.

48 43 Long term water quality monitoring Long-term monitoring of currents for the summer period 2011 in the western (CONTROL1) and eastern (CONTROL2) parts of the Gulf of Finland were in line with the results gathered earlier from these stations. Turbidity was low and oxygen level good or tolerable near the seabed. Ship traffic No incidents were reported during the third quarter of The construction activities did not have any significant impacts on ship traffic in the Finnish EEZ.

49 44 8. REFERENCES /1/ Nord Stream AG Baltic Sea Natural Gas Pipeline Environmental Monitoring Programme Finland. G-PE-PER-REP-000-ENVMONFI-C2, /2/ Nord Stream AG Baltic Sea Natural Gas Pipeline Environmental Monitoring Programme Finland. G-PE-PER-REP-000-ENVMONFI-E /3/ Nord Stream AG Monitoring Programme for Munitions Clearance Finland. G- PE-PER-REP-000-EMPFINMU-G, /4/ Nord Stream AG Transboundary Monitoring Programme Finland. G-PE-PER- REP-000-TRAMOFI-A, /5/ Nord Stream AG Monitoring Programme for Munitions Clearance in Phase 2 Finland. G-PE-PER-REP-000-EMPFIMU2-B, /6/ Ramboll Nord Stream Gas Pipeline Construction and Operation in the Finnish EEZ. Environmental Monitoring Q1/2011. G-PE-EMS-MON ENG0-A / /7/ Ramboll Nord Stream Gas Pipeline Construction and Operation in the Finnish EEZ. Environmental Monitoring 2010, Annual Report. G-PE-EMS-MON ENG0-B / /8/ Witteveen+Bos Nord Stream Munitions clearance in the Finnish EEZ. Final monitoring results on Munition by munition basis. G-PE-EIA-REP-000-MRMCLFIE-B. January /9/ Witteveen+Bos Nord Stream Munitions clearance in the Finnish EEZ. Addendum to: Final monitoring results on Munition by munition basis. G-PE-EIA- REP-000-MRMCLFAD-A. January /10/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 6) mukainen ilmoitus (in English: Notification based on permit provision 6) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010), /11/ Nord Stream AG Etelä-Suomen AVI:n päätöksen nro. 4/2010/4 lupaehtoon 10 perustuva ilmoitus (in English: Notification based on permit provision 10) of decision No 4/2010/4, made by the Regional State Administrative Agency for Southern Finland), /12/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 1) mukainen ilmoitus vähäisestä putkilinjan reittimuutoksesta (in English: Notification on minor change of pipeline route based on permit provision 1) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010), /13/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätökseen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 liittyvä ilmoitus. Ilmoitus koskien muutoksia putkilinjojen käyttöönoton valmistelussa (in English: Notification based on decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February Notification on changes to precommissioning), , corrected

50 45 /14/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4 Nord Stream AG:n maalis-huhtikuulle 2011 suunnittelemat kiviaineksen sijoitustoimet ja niiden mahdolliset vaikutukset hylkeisiin (in English: Decision of the Southern Finland Regional State Administrative Agency No. 4/2010/4 Rock placement activities planned for March - April 2011 by Nord Stream AG and their possible impacts on seals), /15/ Ramboll Nord Stream Natural gas pipeline construction in the Finnish EEZ. Impacts on seals from rock placement planned for March - April 2011, /16/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus ja lupaehdon 32) mukainen esitys vedenlaadun tarkkailusuunnitelman tarkentamiseksi (in English: Commencement notification based on permit provision 34) and proposal for specification of monitoring programme for water quality based on permit provision 32) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010), /17/ Nord Stream AG Etelä-Suomen aluehallintoviraston antamaan päätökseen nro 4/2010/4, dnro ESAVI/28/04.09/2010 liittyvä ilmoitus painetestauksessa käytettävän veden laskemisesta mereen merenpinnan alla kilometrikohdassa 297 (in English: Notification on discharging pressure test water to the sea underwater based on decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010), /18/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräys 15: Putkilinjan käyttöönoton esivalmisteluihin kuuluva putkilinjan osien vedenalainen yhdistäminen (in English: Regional State Administrative Agency for Southern Finland s decision no. 4/2010/4, permit regulation 15: Underwater tie-in of pipelines as part of preparations for pipeline commissioning), /19/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräykset 21 ja 32 Ilmoitus uusista sotatarvikkeista ja niiden siirrosta sekä esitys tarkkailusuunnitelman tarkentamiseksi (in English: Decision of the Southern Finland Regional State Administrative Agency No. 4/2010/4, permit provisions 21 and 32 Notification on new munitions and their shift and proposal for specifying the monitoring programme). G-PE-PER-NOT-000-FI , /20/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräys 21 Täydennys ilmoitukseen uusista sotatarvikkeista ja niiden siirrosta, jätetty (in English: Decision of the Southern Finland Regional State Administrative Agency No. 4/2010/4, permit provision 21 Amendment to notification on new munitions and their shift, submitted ). G-PE-PER- NOT-000-FI , /21/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit condition 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February) (hyperbaric tie-in), /22/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit condition 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010) (construction of Pipeline 2), /23/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit condition

51 46 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010) (rock placement), /24/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräys 34: Aloitusilmoitus kiviaineksen sijoittamisesta putken tukemiseksi veden poistamisen jälkeen (in English: Regional State Administrative Agency for Southern Finland s decision No. 4/2010/4, permit provision 34: Notification of Commencement Rock Placement to Support the Pipeline after Dewatering). G- PE-PER-NOT-000-FI , /25/ Nord Stream AG Tarkennus VOHE3 asemalla suoritettavaan vedenlaadun tarkkailuun (in English: Amendment on water quality monitoring at VOHE3 station), /26/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 32) mukainen ilmoitus mahdollisesti tuntemattoman kaapelin löydöstä (in English: Notification on possible unknown cable based on permit provision 32) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010), /27/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräys 32: Esitys tarkkailuohjelman tarkentamiseksi (in English: Regional State Administrative Agency for Southern Finland s decision no. 4/2010/4, licence regulation 32: Proposal for specifying the monitoring programme), /28/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräys 32: Esitys pohjanläheisten virtausten selvittämistä koskevan ohjelman tarkentamiseksi (in English: Regional State Administrative Agency for Southern Finland s decision no. 4/2010/4, licence regulation 32: Proposal for specifying the programme for monitoring near-bottom currents), /29/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräys 32 Ilmoitus ennen tunnistamattoman hylyn havaitsemisesta (in English: Decision of the Southern Finland Regional State Administrative Agency No. 4/2010/4, permit provision 32 Notification on detection of a previously unidentified wreck), /30/ Nord Stream AG Monthly report on construction works of the Nord Stream Gas Pipeline Project in the Finnish EEZ. Monthly report: Construction works carried out in July PER-RMO MR, /31/ Nord Stream AG Data received from Nord Stream AG on 10 th November Information on dewatering activities. /32/ Nord Stream AG Data received from Nord Stream AG on 28 th October and 24 th November Information on commissioning activities. /33/ Nord Stream AG Notification of the General Implementation Plan for Commissioning of Nord Stream's Pipeline PER-LET , /34/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräykset 21 ja 32 Ilmoitus uusista sotatarvikkeista ja niiden siirrosta sekä esitys tarkkailusuunnitelman tarkentamiseksi (in English: Decision of the Southern Finland Regional State Administrative Agency No. 4/2010/4, permit provisions 21 and 32 Notification on new munitions and their shift and proposal for specifying the monitoring programme). G-PE-PER-NOT-000-FI , /35/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräys 21 Täydennys ilmoitukseen uusista sotatarvikkeista ja niiden siirrosta, jätetty (in English: Decision of the Southern Finland Regional

52 47 State Administrative Agency No. 4/2010/4, permit provision 21 Amendment to notification on new munitions and their shift, submitted ). G-PE-PER- NOT-000-FI , /36/ BACTEC International Limited Nord Stream Project, Munitions Clearance Ordnance Removal ( Lift & Shift ) Plan, Targets R , R and R Doc. No. G-GE-MUN-REP-163-REMPLN04-A. /37/ MMT Nord Stream Pipeline Project, Munitions Clearance, Lift & Shift Operations R , R and R Doc. No. G-GE-SUR- REP-108-LIFTSH10-A. /38/ Nord Stream AG Monthly report on construction works of the Nord Stream Gas Pipeline Project in the Finnish EEZ. Monthly report: Construction works carried out in August PER-RMO MR, /39/ Nord Stream AG Data received from Nord Stream AG on 14 th November Information on pipelay progress. /40/ Nord Stream AG Data received from Nord Stream AG on 28 th October Information on rock placement activities. /41/ Nord Stream AG Nord Stream ( ). (English summary: Report on environmental monitoring during hydraulic testing of the Pipeline 1) Moscow 2011 /42/ MMT Nord Stream Pipeline Project. Debric Inspection & Removal. HBTI, KP 297 Finland. 1-CE-SUR-REP-108-DEBRIS02-A /43/ Ramboll Nord Stream Gas Pipeline Construction and Operation in the Finnish EEZ. Environmental Monitoring Q2/2011. G-PE-EMS-MON ENG0-B / /44/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /45/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /46/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /47/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /48/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /49/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /50/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /51/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A

53 48 /52/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /53/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /54/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /55/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /56/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /57/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /58/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /59/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP-124-AE A /60/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP A /61/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP B /62/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP B /63/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP B /64/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP A /65/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP B /66/ Saipem Nord Stream Project. As-laid Survey Field Report line 2 (east) Finland. KP to CE-PIL-REP A /67/ Saipem Nord Stream Project. Pre-lay Survey Procedure. 1-CE-PIL-PRO A, /68/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID MB G-GE-SUR-REP-108-WRPOST14-A /69/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID S-W8A G-GE-SUR-REP-108-WRPOST16-A /70/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID S G-GE-SUR-REP-108-WRPOST17-A /71/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID S G-GE-SUR-REP-108-WRPOST14-A

54 49 /72/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID S G-GE-SUR-REP-108-WRPOST19-A /73/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID S G-GE-SUR-REP-108-WRPOST20-A /74/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID S G-GE-SUR-REP-108-WRPOST21-A /75/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID S G-GE-SUR-REP-108-WRPOST22-A /76/ MMT Nord Stream Pipeline Project. Post-Lay Wreck Inspection. ID 08-S-20. G-GE-SUR-REP-108-WRPOST15-B /77/ MMT Nord Stream Pipeline Project. Post-Lay Barrel Inspections. Line 2 (East) KP 161, 167 & 302. ROV Visual Inspection. August G-GE-SUR-REP-108- POSTDR10-A. /78/ Saipem Nord Stream Project. As-left survey field report. Line 2 (East) Finland. FEC 02 cable crossing. KP M/V Highland Rover. 2-CE-PIL-REP- 124-AE A /79/ Saipem Nord Stream Project. As-left survey field report. Line 2 (East) Finland. EE-SF2 cable crossing. KP M/V Highland Rover. 2-CE-PIL-REP- 124-AE A /80/ Saipem Nord Stream Project. As-left survey field report. Line 2 (East) Finland. Pangea Seg3 cable crossing. KP M/V Highland Rover. 2-CE-PIL- REP-124-AE A /81/ Saipem Nord Stream Project. As-left survey field report. Line 2 (East) Finland. Unknown cable crossing. KP M/V Highland Rover. 2-CE-PIL-REP- 124-AE A /82/ Saipem Nord Stream Project. As-left survey field report. Line 2 (East) Finland. Unknown cable crossing. KP M/V Highland Rover. 2-CE-PIL-REP- 124-AE A /83/ Saipem Nord Stream Project. As-left survey field report. Line 2 (East) Finland. EE-SF3 cable crossing. KP M/V Highland Rover. 2-CE-PIL-REP- 124-AE A /84/ Saipem Nord Stream Project. As-left survey field report. Line 2 (East) Finland. Estlink cable crossing. KP M/V Highland Rover. 2-CE-PIL-REP- 124-AE A /85/ Saipem Nord Stream Project. As-left survey field report. Line 2 (East) Finland. FEC-01 cable crossing. KP M/V Highland Rover. 2-CE-PIL-REP- 124-AE A /86/ Saipem Nord Stream Project. Line 2 (East). Pangea Seg 3 cable crossing. As-left survey field report. M/V Grampian Surveyor. 2-CE-PIL-REP B

55 50 /87/ Saipem Nord Stream Project. Line 2 (East). EE-S1 cable crossing. As-left survey field report. M/V Grampian Surveyor. 2-CE-PIL-REP B /88/ Saipem and Boskalis Offshore - Tideway JV Survey and positioning procedure for rock dumping WP11. G-CE-POL-PRO-124-BT A /89/ Saipem Energy Services and Boskalis Offshore Tideway JV Nord Stream project. Survey and positioning procedure for rock dumping WP07. G-CE-PRL-PRO- 124-BT A /90/ Luode Consulting Oy Water quality and current monitoring during Nord Stream operations in the Gulf of Finland, November 2009 May Antti Lindfors, Luode Consulting Oy, , G-PE-EMS-MON-175-LUODLON-A /91/ Data from Finnish Meteorological Institute (FMI) /92/ Saipem Energy Services Nord Stream Layout drawing, tie-in Finnish EEZ, Line 2. 2-EN-PIE-DWG B /93/ Saipem Energy Services Nord Stream Pipeline alignment sheet line 2 Finnish sector KP 330 KP EN-PIE-DWG B /94/ Saipem Energy Services Nord Stream Pipeline alignment sheet line 2 Finnish sector KP 320 KP EN-PIE-DWG B /95/ Nord Stream AG Data received from Nord Stream AG on 22 nd November Information on drying and nitrogen filling activities. /96/ Nord Stream AG C6 Passage Past Culturally Significant Wrecks - Finnish EEZ Pipeline 2 Installation. G-GE-SUR-TNO AK, rev. 01. /97/ Nord Stream AG Ilmoitus koskien Nord Stream -projektia ja jääolosuhteita (in English:The Nord Stream project and the winter ice period), /98/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit provision 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010) (rock placement, mattress installation, pre-lay survey), /99/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit provision 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010) (mattress installation), /100/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit provision 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010) (mattress installation), /101/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit provision 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the

56 51 Regional State Administrative Agency for Southern Finland on 12 February 2010) (rock placement), /102/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit provision 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010) (pipelay), /103/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit provision 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010) (surveys related to pipelay), /104/ Nord Stream AG Etelä-Suomen aluehallintoviraston antaman päätöksen nro. 4/2010/4, dnro ESAVI/28/04.09/2010 lupaehdon 34) mukainen aloitusilmoitus (in English: Commencement notification based on permit provision 34) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010) (pipelay), /105/ Nord Stream AG Etelä-Suomen aluehallintoviraston päätös Nro 4/2010/4, lupamääräys 34: Ilmoitus Nord Streamin Putkilinjan 1 käyttöönottotoimenpiteiden aloittamisesta (in English: Regional State Administrative Agency for Southern Finland s decision No. 4/2010/4, permit provision 34: Notification of commencement of commissioning of Nord Stream Pipeline 1). G-PE-PER-NOT-000- FI , /106/ Nord Stream AG Notification based on permit conditions 11) and 12) of decision No 4/2010/4, register number ESAVI/28/04.09/2010, made by the Regional State Administrative Agency for Southern Finland on 12 February 2010,

57 APPENDIX 1 Nord Stream Gas Pipeline construction and operation in the Finnish EEZ. Environmental monitoring Q3/2011 Nord Stream construction activities in the Finnish EEZ during Q3/2011

58 APPENDIX 2 Nord Stream Gas Pipeline construction and operation in the Finnish EEZ. Environmental monitoring Q3/2011 Nord Stream monitoring locations in the Finnish EEZ during Q3/2011

59 APPENDIX 3 Nord Stream Gas Pipeline construction and operation in the Finnish EEZ. Environmental monitoring Q3/2011 ROCK PLACEMENT DATA TABLE Berm ID Type* Central KP, m Pipeline Date of completion Amount (actual), Te Volume, m 3 (calculated, m 3 =Te/1.56) ASL_W_Lat_ Line ,936 1,241 ASL_W_Lat_ Line , ASL_W_Lat_ Line ,823 1,168 ASL_W_Lat_ Line ASL_W_Lat_ Line , ASL_W_Lat_ Line ASL_W_Lat_ Line W Line ,120 3,282 WK Line ,937 1,242 WK Line ,141 1,372 WK Line WK Line , W Line W Line W Line W Line W Line W Line , W Line W Line E Line E Line E Line ASL_W_Lat_ Line ,404 1,541 ASL_W_Lat_ Line W2646_E Line W Line W Line ,012 1,290 Tie-in Line ,913 3,790 *Type of post-lay berm; explanation for classes 1-5: Total 35,498 22,755 1: Designed post-lay rock placement on top of the pre-lay berm 2: Designed post-lay rock placement location on seabed 3: Post-lay rock placement location on seabed based on the as-laid survey data 4: Post-lay rock placement location on seabed to prevent in-service buckling, ISB (In-service buckling berms are required to limit horizontal or vertical movement of the pipeline during operation that could lead to localised movement resulting in permanent damage to the pipeline) 5: Designed post-lay rock placement on top of the post-lay phase 2 berm

60 APPENDIX 4 Nord Stream Gas Pipeline construction and operation in the Finnish EEZ Environmental monitoring Q3/2011 MONITORING REPORT FROM NORD STREAM PROJECT S CONTRACTOR FOR WATER QUALITY AND CURRENT MONITORING: Luode Consulting Oy Water quality and current monitoring during Nord Stream operations in the Gulf of Finland, November 2009 August Antti Lindfors, Luode Consulting Oy, , G-PE-EMS-MON-175-LUODELO3-A

61 Contractor LOGO Nord Stream Project A Issue for Use APL APL APL Rev. Date Description Prepared Checked Approved Luode Consulting Oy Nord Stream AG Contractor LOGO Document Title W A T E R Q U A L I T Y A N D C U R R E N T M O N I T O R I N G D U R I N G N O R D S T R E A M O P E R A T I O N S I N T H E G U L F O F F I N L A N D, November 2009 August 2011 Company Representative : Tiina Salonen Country Code: Reference : PO. No. : Contractor Representative : Antti Lindfors Document Owner : Luode Consulting Oy Pipe line Document-No. G-PE-EMS-MON-175-LUODELO3-A Sub project Discipline Doc. Type Originator ID Unifier Rev. A

62 2 of 23 Report identification: W A T E R Q U A L I T Y A N D C U R R E N T M O N I T O R I N G D U R I N G N O R D S T R E A M O P E R A T I O N S I N T H E G U L F O F F I N L A N D, NOVEMBER 2009 AUGUST 2011 Rev Author Date Status Checked Approved 02 Antti Lindfors Draft Tiina Salonen APL 03 Antti Lindfors Amended version by NSP Tiina Salonen APL comments A Antti Lindfors Final Tiina Salonen APL Nord Stream document number: G-PE-EMS-MON-175-LUODELO3-A

63 3 of 23 Table of contents 1. Introduction 4 2. Material and Methods Continuous monitoring with fixed stations Data overview Water quality and current data 8 3. Results Temperature Salinity Turbidity Dissolved oxygen Currents Water samples and CTD profiles 19 Attachments 20 Nord Stream document number: G-PE-EMS-MON-175-LUODELO3-A

64 4 of Introduction This report includes results of measurements with fixed sensors between November 2009 and August 2011 in the Gulf of Finland. Report includes data collected from CONTROL1 and -2 stations which are used to provide long-term water quality reference data throughout the construction period. The stations are located outside the potential influence area of the construction works. Locations of stations are shown on map 1. Map shows also locations of other three FIX stations which were used during earlier construction activities. Data collected from these three stations has been reported in reports Water quality and current monitoring during Nord Stream operations in the Gulf of Finland, 3 rd of November th of June 2010, Luode Consulting Oy, G-PE-EMS-MON-175-LUODEQ2L-A and Water quality and current monitoring during Nord Stream operations in the Gulf of Finland, 3 rd of November th of September 2010, Luode Consulting Oy, G-PE-EMS-MON-175-LUODEQ3L- A. Monitoring is based on the approved monitoring program: G-PE-PER-REP-000-ENVMONFI-E. Both CONTROL1 and 2 stations were equipped with automatic water quality instruments measuring salinity, temperature, turbidity and dissolved oxygen meters above the sea floor. In addition stations have 3D acoustic doppler current profilers (ADCP) which monitor current velocity and direction from bottom to surface in several layers. Map 1. Location of the long term monitoring stations FIX1-3 and reference stations CONTROL1-2. (Map Ramboll Finland Oy) Nord Stream document number: G-PE-EMS-MON-175-LUODELO3-A

65 5 of 23 Summary of main conclusions Based on the results no effect on marine environment was found at any of the monitoring sites due to Nord Stream construction works. Levels of turbidity, salinity, temperature or dissolved oxygen concentration did not differ from typical values measured in the Gulf of Finland. Table 1 shows coordinates, water depth and different parameters recorded at each station. Table 1. Recorded parameters on both CONTROL stations. Position and water depth Parameters Monitoring depth CONTROL1 Water depth 43 m Monitoring depth ~41m Automatically measured parameters: salinity, temperature, turbidity, dissolved oxygen concentration, 3D current velocity and direction Control water samples: metals, nutrients, turbidity and suspended matter and oxygen concentration Water quality: meters above bottom Currents: all depths CONTROL2 Water depth 47 m Monitoring depth ~45m Automatically measured parameters: salinity, temperature, turbidity, dissolved oxygen concentration, 3D current velocity and direction Control water samples: metals, nutrients, turbidity and suspended matter and oxygen concentration Water quality: meters above bottom Currents: all depths 2. Material and Methods 2.1 Continuous monitoring with moored stations Continuous long term monitoring at CONTROL stations is carried out with moored instruments (Locations are marked in Map 1). Monitoring instruments, self-logging YSI-6600 series Deep Water sondes (Fig 2), record salinity, temperature, oxygen and turbidity levels at each of the monitoring locations with 60 minutes interval. Instrument makes in the beginning of each hour set of observations, calculates and stores an average value of these numbers into internal memory and then goes into stand-by mode in order to save power. Cycle starts over in the beginning of next hour. Ranges, resolution and accuracy of the YSI sonde are listed in the Attachment 1. Sensors have automatic cleaning system to prevent fouling. Nord Stream document number: G-PE-EMS-MON-175-LUODELO3-A

66 6 of 23 Figure 2. YSI multiparameter sonde. In addition to water quality measurements, at CONTROL1 and 2 stations current measurements are performed with recording 3D ADCPs (Acoustic Doppler Current Profiler). These are of the type 300 or 600 khz RD Instruments Workhorse Sentinel ADCPs that are equipped with pressure and temperature sensors (Fig 3). These instruments measure currents from bottom to surface with 2 meter vertical resolution at 60 min interval. ADCP does not measure lowermost 2 meter layer, since the transmitted acoustic signal otherwise interferes with incoming signal. Therefore these overlapping signals are deleted from received information. One sample is taken every 60 second and averaged value will be logged every 60 minutes which allows the current velocity to be measured with accuracy better than 1 cm/s. Figure 3. RD-Instruments Workhorse Sentinel ADCP Current meters and automatic water quality meters are moored to the sea floor with concrete weights that are equipped with acoustic releasers by Sonardyne (Fig 4). Monitoring at CONTROL1-2 stations started in the beginning of November 2009, two weeks prior to the intended start of ammunition clearance in Finnish and Russian waters and monitoring will continue until construction activities are over. Nord Stream document number: G-PE-EMS-MON-175-LUODELO3-A

67 7 of 23 Figure 4. Sonardyne acoustic releaser with a distance transponder. Figure 5 shows an installation set-up of long term monitoring stations including ADCP, acoustic transponder + releaser and YSI multiparameter sonde. Multiparameter sonde is moored meters above the seafloor while ADCP stands at the bottom. All instruments were calibrated before deployment according to manufacturer s instructions. Figure 5. Example of measurement setup for long term monitoring stations. Not in scale. Nord Stream document number: G-PE-EMS-MON-175-LUODELO3-A