acg ffd phase 3 & shah deniz air dispersion modelling acg...

Azeri, Chirag & Gunashli Full Field Development Phase 3 Environmental & Socio-economic Impact Assessment Final Report

APPENDIX 11 ACG FFD Phase 3 & Shah Deniz Air Dispersion Modelling ACG PHASE 3 Offshore Air Dispersion Modelling Results Report

31648-046 ACG Phase 3 ESIA A11/1 October 2004

Azeri, Chirag & Gunashli Full Field Development Phase 3 Environmental & Socio-economic Impact Assessment Final Report

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31648-046 ACG Phase 3 ESIA A11/2 October 2004

Air Dispersion Modelling ACG Full Field Development Phase 3 Shah Deniz Stage 1 Doc. No. BP-3SZZZZ-EV-REP-0003.D1

TECHNICAL DOCUMENTATION FRONT SHEET

AZERBAIJAN INTERNATIONAL OPERATING COMPANY

Total pages: 56

ACG PROJECT

ACG FFD Phase 3 & Shah Deniz Air Dispersion Modelling

D1 07/04/04 AFD AW

A1 18/02/04 IDC AW RJB

Rev Date Reason for Issue Prepared Checked Approved

Disc. Eng. Disc. Lead Contr. Rep

BP (AIOC) Contract

No.: Disk Ref.:

Category Code Description

Location Code 3SZZZZ Sangachal terminal

Document Type REP Report

System Number ZZ General

Notes: Air Dispersion Modelling undertaken by Granherne on behalf of BP.

Life Cycle D Operational through life

Contractor Location Code Disc Doc. Type Sequence

No. Revision This document is copyright and shall not be reproduced without permission of AIOC. BP 3SZZZZ EV REP 0003 D1


Executive Summary Air dispersion modelling was carried out for the future developments, onshore, of ACG FFD Phase 1, 2 and 3 and Shah Deniz Stage 1 to ensure that the proposed developments would not exceed the internationally recognised air quality standards and guidelines. The Air Dispersion Modelling is used to assess the ambient air quality in the area of concern and compares predicted concentrations with the international air quality standards. The air dispersion modelling took into account the emissions from the Sangachal Terminal with the current operation of Early Oil Project and the proposed development of ACG FFD Phase 1, 2 and 3 and Shah Deniz Stage 1. Both normal and upset conditions were modelled, including the Shah Deniz ground level flare. The modelling covered the period 2002 –2010. Emissions of nitrogen dioxide (NO2) and carbon monoxide (CO) were modelled to give a forecast of air quality in the area. Sulphur dioxide (SO2) was not modelled as the reservoir does not contain significant levels of sulphur (as H2S). The results confirm that the complex will not result in exceedances of international air quality standards.


TABLE OF CONTENTS 1 INTRODUCTION.................................................................................................. 7

1.1 ASSESSMENT BASIS.......................................................................................... 7 1.2 ACG FFD PROJECT BACKGROUND ................................................................... 7 1.3 SHAH DENIZ PROJECT BACKGROUND ................................................................. 9 1.4 ONSHORE –SANGACHAL TERMINAL .................................................................... 9

1.4.1 Early Oil Project........................................................................................ 9 1.4.2 ACG FFD................................................................................................ 10 1.4.3 Shah Deniz............................................................................................. 10

2 METHODOLOGY............................................................................................... 11

2.1 SCENARIOS .................................................................................................... 11 2.2 EMISSION DATA............................................................................................... 12

2.2.1 Terminal Complex .................................................................................. 12 2.2.2 Process data .......................................................................................... 13

2.3 MODELING APPROACH .................................................................................... 13 2.3.1 Air Dispersion Model .............................................................................. 13 2.3.2 Meteorological data ................................................................................ 14 2.3.3 Buildings and Topography...................................................................... 14 2.3.4 Receptors and Contours......................................................................... 14 2.3.5 Baseline Air Quality ................................................................................ 14 2.3.6 Air Quality Standards and Guidelines..................................................... 15

2.4 ASSUMPTIONS ................................................................................................ 15 2.4.1 Operating hours...................................................................................... 15 2.4.2 Summary of Assumptions....................................................................... 15

3 RESULTS .......................................................................................................... 16

3.1 DISPERSION MODEL RESULTS.......................................................................... 16

4 CONCLUSIONS................................................................................................. 25

1 INTRODUCTION................................................................................................ 42

2 INPUT INFORMATION ...................................................................................... 42

2.1 MODEL USED ................................................................................................. 42 2.2 AVERAGING TIMES .......................................................................................... 42 2.3 SOURCE INPUTS ............................................................................................. 42 2.4 RECEPTORS ................................................................................................... 42 2.5 METEOROLOGICAL DATA ................................................................................. 42

3 DISPERSION ISOPLETHS................................................................................ 43

4 RESULTS .......................................................................................................... 56


APPENDICES APPENDIX I Plot Plan APPENDIX II Contour Plots APPENDIX II I Wind Rose APPENDIX IV Source Data NO2 APPENDIX V Source Data CO Glossary ACG Azeri, Chirag, Gunashli AIOC Azerbaijan International Operating Company AQS Air Quality Standards BBLS Barrels Bpd barrels per day C&WP Compression and water injection platform CO2 Carbon Dioxide DETR Department of Environment Transport and the regions (that was) DLE Dry Low emissions EOP Early Oil Project ESD Emergency Shutdown FFD Full field development FOC Foreign Oil Companies HP High Pressure H2S Hydrogen Sulphide MEG Mono Ethylene Glycol MMSCFD Million Standard cubic feet per day MBWD Thousand barrels of water per day NO Nitric Oxide NO2 Nitrogen Dioxide NOx Oxides of Nitrogen PC Process Contribution PDQ Production-Drilling & Quarters Platform PDUQ Production, Utilities, Drilling & Quarters PEC Predicted Environmental concentration PSA Production Sharing Agreement SD Shah Deniz SO2 Sulphur Dioxide


1 Introduction 1.1 Assessment Basis An assessment of atmospheric emissions from the Sangachal Terminal for Early Oil Project (EOP), Azeri Chirag Gunashli Full Field Development (ACG FFD) Phase 1, 2 and 3 and Shah Deniz Stage 1 projects has been carried out. The aim of the air quality study is to provide an assessment of air quality impacts in the vicinity of the Sangachal Terminal due to operations of the proposed development.

This air quality study report includes:

Predictions of ground level concentrations of substances of concern at identified sensitive receptors.

An assessment of these concentrations against international air quality standards and guidelines to identify any substances that would be considered significant;

The study has considered the air quality impacts of the existing Early Oil Project (EOP) project at Sangachal terminal as well as the air quality effects associated with the addition of the ACG FFD Phase 1, 2 and 3 developments and Shah Deniz Stage 1.

The methodology and model inputs used are presented in Chapter 2 and the results in Chapter 3. The interpretation and conclusions are presented in Chapter 4. The Appendices provide a layout plan, the input process data and air quality maps. 1.2 ACG FFD Project Background The Azerbaijan International Operating Company (AIOC) offshore development is located in the Azerbaijan sector of the Caspian Sea, approximately 120 km south east of Baku. The onshore terminal is located 2km from Sangachal town site, approximately 40 km south west of Baku.

AZERBAIJAN

ExistingPlatforms

BAKU

Bahar

SANGACHAL

Pipeline Route

Gunashi

Chirag MSP-1

Oil Rocks

CASPIAN SEA

AIOCPSA Area

Shah Deniz

Azeri field


In September 1994 a Production Sharing Agreement (PSA) was signed by the Azerbaijan Government and the Azerbaijan International Operating Company (AIOC) in which BP are a majority shareholder. The PSA lasts for a period of 30 years and covers an offshore contract area of 432 square kilometres in the Azeri and Chirag fields, together with the deep water portion of Gunashli field.

The PSA grants rights to the Foreign Oil Companies (FOCs) to invest in and develop the fields, to produce and market the oil. The Full Field Development is planned to be implemented as a phased development.

ACG FFD Phase 1 - The objective is to produce and deliver the recoverable reserves in the central part of the Azeri Field and to tie-in production of reserves from the operational Chirag-1 field. The Phase 1 Project will consist of :-

• Expansion of the existing onshore terminal facilities at Sangachal;

• A Production, Drilling and Quarters Platform (PDQ);

• A Compression and Water Injection Platform (C&WP), bridge linked to the PDQ;

• Pipelines connecting the various fields together and to convey oil and gas to the onshore terminal at Sangachal;

• Conversion of the existing Chirag-1 field which will be tied in to Phase I production facilities and pipelines.

C&WP Platform is located in central Azeri and is intended to provide sufficient water injection and gas re-injection compression facilities to maintain required reservoir pressures throughout the Azeri field, to achieve the desired production profiles.

ACG FFD Phase 1 first oil is scheduled for 2005.

ACG FFD Phase 2 - This Project is designed to deliver the recoverable hydrocarbons reserves in the East and West sectors of the Azeri Field and comprises of Production, Drilling utilities and Quarters facilities intended for simultaneous development of the East and West Azeri field and further development of the onshore terminal.

New facilities will comprise:

Production, Utilities, Drilling and Quarters Platform (PDUQ) at West Azeri; PDUQ Platform at East Azeri; and, In-field and export sub-sea pipelines.

Modifications to existing facilities will comprise:

Expansion of the Compression and Water injection Platform (C&WP) put in place at Central Azeri by Phase 1; and,

Further expansion of the Sangachal on-shore terminal.


First oil for West Azeri is scheduled for 2006 and first oil for East Azeri is 2007.

ACG FFD Phase 3 - comprises a Drilling, Utilities and Quarters (DUQ) facility bridge linked to a Production, Compression, water injection and utilities (PCWU) intended for development of the Deep Water Gunashli field and further development of the onshore terminal.

New facilities will comprise:

• DUQ platform

• PCWU platform bridge linked to the DUQ

• Two water injection subsea templates

• Infield pipelines, tied into the export pipelines from Azeri

Modifications to existing facilites will comprise:

• Further expansion of the onshore terminal

1.3 Shah Deniz Project background The Shah Deniz offshore development is located in the Azerbaijan sector of the Caspian Sea, approximately 100 km south of Baku. The onshore terminal is located 2km from Sangachal, approximately 40 km south west of Baku, adjacent to the previously described ACG terminal.

A Production Sharing Agreement (PSA), with different oil companies than ACG, has been signed between the Azerbaijan Government and a consortium of seven Foreign Oil Companies (FOCs) of which BP is the major shareholder and operator.

The objective of the project is to provide a low unit cost gas and condensate production system. Gas conditioned for transportation and sales will be transferred from the Sangachal terminal to an export pipeline system, ultimately delivering gas to the Turkish and Georgian markets. Stabilised liquid condensate will also be produced at the terminal, for export as a product co-mingled with crude oil from ACG oil and gas project.

1.4 Onshore –Sangachal Terminal 1.4.1 Early Oil Project The onshore terminal receives oil and gas from the currently operating Chirag 1 platform. EOP has 5 trains of oil stabilisation, including 3 gas turbines and 5 heater treaters and 4 crude oil storage tanks, an off spec storage tank and HP and LP flare.


1.4.2 ACG FFD Phase 1 Onshore, the terminal at Sangachal currently processes reserves from the Early Oil Project (EOP) from Chirag-1, and will be expanded to accept 490 Mbd Oil & 250 MMSCFD Gas from Chirag-1 and ACG FFD Phase 1. Facilities will include:-

• Expansion of the terminal storage tankage by 1,600,000 barrels; • Produced water storage and pumping facilities for 125,000 barrels of produced

water storage (5 days capacity). • Booster pumping facilities, export custody transfer metering system. • Inlet gas receiving facilities, dewpoint and dehydration facilities for 350 MMSCFD. • Utilities-power generation/services • High Pressure and Low Pressure Flares Phase 2

The Phase 2 expansion of the Sangachal on-shore terminal will include the installation of two more trains of oil and water separation and stabilisation. This will involve the addition of more power generation and extra oil heating facilities.

Phase 3 The anticipated development for Phase 3 will include the addition of two further trains, another dew point control unit for 350 MMSCFD and 1 new storage tank. There is provision to include a sulphur treatment plant at a future stage of the development. 1.4.3 Shah Deniz The onshore terminal for the Shah Deniz gas development is to receive well fluid from offshore and to condition the gas to meet sales gas specifications and stabilised condensate for export. The export gas shall be metered to fiscal standard before transfer to the export pipeline. The stabilised condensate will be exported via one of the crude main export pipelines. The terminal will be designed for a nominal throughput volume of 990 MMSCFD of gas and 62,000 barrels per day (bpd) of condensate. The facility includes:-

• Gas and condensate receiving facilities from offshore via separate 12” condensate and 26” wet gas pipelines

• Gas processing through conditioning via two trains • Gas compression and export metering • Condensate storage to 165,000 bbls on spec. capacity • Process systems for condensate at 62,000 bpd capacity • Mono Ethylene Glycol (MEG) regeneration plant sized to regenerate 17,000

kg/h of lean MEG for years 1-6 and 24,000 kg/h from year 6 onwards. • Stand alone Shah-Deniz utilities, including power generation


• A ground-level flare for the safe disposal of hydrocarbon gases during emergency or upset conditions.

2 Methodology 2.1 Scenarios The air dispersion modelling study has considered the air quality impacts at Sangachal Terminal including the existing Early Oil Project (EOP) and the potential new developments of ACG FFD Phase 1, 2 & 3 and Shah Deniz stage 1.

Scenarios were designed to take into account the planned operations at Sangachal terminal including:

1. EOP in normal operation (2004)

2. ACG Phase 1, 2, EOP and Shah Deniz in normal operation (2007)

3. ACG Phase 1, 2, EOP and Shah Deniz in normal operation plus ACG Phase 3 start up (2008)

4. ACG Phase 1, 2, 3, EOP and Shah Deniz in normal operation (2010), peak production.

5. ACG Phase 1, 2, 3 EOP and Shah Deniz operation with the addition of emergency shut down of ACG FFD via elevated flare at a rate of 100mmscfd for 1 hour*

6. ACG Phase 1, 2, 3 EOP and Shah Deniz operation with the addition of emergency shut down of Shah Deniz via ground flare at a rate of 990 mmscfd *

Note * The design rate for both flares are for emergency shut downs. This rate will only last for a few minutes and will exponentially decay. For modelling purposes the full blow down rate was assumed to last for one hour.

The emissions from the process were modelled using the air dispersion package Lakes ISC-AERMOD for dispersion from a point source; the engineering data input into the model has been included in Appendix II. Information needed for input into a dispersion model includes process conditions, meteorological data and topography.

The ground level concentrations attributable to emissions from the plant were combined with background concentrations of pollutants to estimate the overall concentration of NO2 and CO in the vicinity of the plant. These concentrations were compared to international air quality standards and guidelines.

The air dispersion modelling study has considered the air quality impacts of the existing EOP project at Sangachal Terminal and the future operating scenario with the potential new developments of ACG FFD Phase 1, 2 and 3 and Shah Deniz stage 1.


Planned shutdowns for maintenance occur every 4 years. There is the possibility of emergencies resulting in unplanned shutdowns giving rise to emissions due to flaring. ACG and Shah Deniz facilities do not share a common flare system and are independent from each other; therefore the chance of both facilities going into an ESD is extremely unlikely. The modelling has taken into account the possibility of flaring from ACG FFD Phase 1, 2 and 3 and EOP only, and also from Shah Deniz only.

At the terminal ACG Phase 1 requires dual fuel turbines for start up capabilities, with the option is to retrofit DLE NOx at a later date. ACG Phase 2 and 3 and Shah Deniz are installing DLE NOx gas fired turbines. For purposes of the modelling it has been assumed that after the start up of ACG Phase 2, DLE gas turbines will be used preferentially. The number of gas turbines used in the model reflects the power requirements for the period modelled. 2.2 Emission data Emissions from the terminal are a result of combustion of fuel gas, which gives rise to emissions that consist mainly of carbon dioxide (CO2) and water. Carbon monoxide (CO) and oxides of nitrogen (NOx) are also emitted in smaller quantities.

The process releases to air from the terminal, which have the potential for effects on human health and vegetation in the vicinity of the plant are NOx and CO. This report has focused on the potential local air quality effects of emissions of NOx and CO.

NOx emitted from the combustion source comprises a mixture of the relatively low toxicity nitric oxide (NO) and the more toxic nitrogen dioxide (NO2). The majority of NOx produced from a combustion process is in the form of NO. The NO is converted to NO2 by oxidation in the presence of ozone and sunlight in the atmosphere. In accordance with standard practise, it has been conservatively assumed that 50% of the NOx is present in the form of NO2 and it is the NO2 concentration that has been modelled. 2.2.1 Terminal Complex The terminal consists of various units that give rise to emissions. Location of the sources with respect to each other has been marked on the plot plan included in Appendix I. Table 2.1 lists the sources and the fuel used in the units.

Table 2.1: Sources at Sangachal Terminal Model Source

Ref.

Source Fuel Location

EOP Easting

(m) Northing

(m) 1 Gas Turbine A Gas 9371033 4452930 2 Gas Turbine B Gas 9371027 4452939 3 Fired Heater A Gas 9370892 4452856 4 Fired Heater B Gas 9370882 4452871 5 Fired Heater C Gas 9370870 4452889 6 Fired Heater D Gas 9370860 4452905 7 Fired Heater E Gas 9379830 4452921


Model Source

Source Fuel Location

Ref. ACG FFD Phase 1

13 Gas Turbine A Gas 9370380 4452611 14 Gas Turbine B Gas 9370392 4452619 15 Gas Turbine C Gas 9370404 4452627 16 Fired heater A Gas 9370275 4452969 17 Fired Heater B Gas 9370293 4452981 19 Flare HP Gas 9369663 4452607

ACG FFD Phase II 20 Gas Turbine A Gas 9370414 4452633 21 Gas Turbine B Gas 9370423 4452644 22 Fired Heater A Gas 9369864 4453257 23 Fired heater B Gas 9369900 4453293

ACG FFD Phase III 24 Gas Turbine A Gas 9370435 4452652 25 Gas Turbine B Gas 26 Fired heater A Gas 9369936 4453329 27 Fired Heater B Gas

Shah Deniz 28 Gas Turbine A Gas 9370324 4452575 29 Fired Heater A Gas 9370228 4452675 30 Ground Flare Gas 9369663 4452607

* The ACG FFD Flare system is designed for the Full Field development and will be used if any flaring is required for ACG FFD all phases and EOP. EOP flare will not be used preferentially after the start up of ACG FFD Phase 1.

2.2.2 Process data The process data used comprises of measurements taken at EOP and forecasts of emissions based on engineering design and manufactures data for future developments. 2.3 Modeling Approach The maximum predicted ground level concentrations attributable to emissions from the plant were assessed, taking into account the existing background concentrations of pollutants to estimate the overall maximum concentration of NO2 and CO. These concentrations were compared to internationally accepted air quality standards and guidelines (see Table 2.4). The model calculated hourly, daily and annual averages. CO standards include an 8-hour averaging period but the hourly average was selected as the critical standard for comparison. 2.3.1 Air Dispersion Model The Lakes ISC-AERMOD package was used to model releases from the Sangachal Terminal ISC is a well established model which has provided dispersion results for the major of such studies over the last 25 years. AERMOD is a “new generation” computer based model which improves on the accuracy of dispersion in unstable conditions, but for the majority of the time the results are comparable with ISC. Both models use the well known plume rise formula of Briggs, which was developed for conventional boiler stacks, mainly those of power stations.


The model can take into account emissions from the source, location of nearby buildings, topography and meteorological data for the local area. The model can provide a predicted concentration of the substance of interest at a specified point or across a grid covering the area of interest. Both short and long term concentrations can be predicted depending upon the availability of meteorological data. 2.3.2 Meteorological data The meteorological data obtained for this modelling is taken from data provided to Baku airport, which, of the auditable datasets available, was judged to be the most representative of the conditions at Sangachal. The dataset covers 1999 to 2001 inclusively. It is a validated data set providing a range of parameters required for air modelling, including temperature, wind direction, cloud cover, ceiling height and humidity. However, a "worst case" meteorological dataset has been constructed for the purposes of this report. This data set contains published screening meteorological criteria which represent the full range of meteorological conditions encountered at any location, excluding only ‘extreme’ events which occur infrequently. 2.3.3 Buildings and Topography It was judged that there are no buildings sufficiently large and close to the emission sources to interfere with dispersion. The area around the terminal is a rural area and the gradient of the land to the west of the terminal rises gradually, therefore a flat topography is appropriate for the modelling. 2.3.4 Receptors and Contours Predictions of pollutant concentrations are made at user defined locations or receptors. The locations of individual receptors are:

Sangachal Town

West Hill Herders

Cheyildag

Cement Camp

The modelled concentrations were processed to produce contour plots of pollutant concentrations. 2.3.5 Baseline Air Quality The background concentration of NOx has been taken from the Air Monitoring Report (Reference 2: AIOC Air Quality Survey 2000, R. Finney) undertaken in 2000 by BP. The background levels have been added to the results of the air dispersion modelling to allow comparison with the appropriate Air Quality Standard.

Baseline air quality was monitored by BP both in 1997, prior to the start of EOP and in 2000, when EOP was in operation. The baseline ambient air quality data is presented in Table 2.3.


Table 2.3: Baseline data

Nitrogen Dioxide Background concentrations Hourly

µgm-3 Annual µgm-3

Terminal 6 3 Sangachal Town 8 4 Pipeline Landfall 4 2 Cement Camp 6 4

2.3.6 Air Quality Standards and Guidelines The current international air quality standards and guidelines were used in assessing the significance of the predicted concentrations of NO2 and CO. These are presented below in Table 2.4.

Table 2.4: International Standards and Guidelines of Air Quality Pollutant Air Quality Objectives Concentration

µgm-3 Averaging period International Standard or

guideline

Nitrogen Dioxide 200 1 hour mean (99.8%ile) WHO, EC, UK

150 24 hour average WHO, World Bank

40 Annual mean WHO, EC, UK

Carbon Monoxide 30,000 I hour mean WHO, EU, UK

10,000 8 hour rolling average WHO

NB 99.8%ile = standard not to be exceeded more than 18 times per year 99.9%ile = standard not to be exceeded more than 35 times per year 99.7%ile = standard not to be exceeded more than 24 times per year 99.2%ile = standard not to be exceeded more than 3 times per year. 2.4 Assumptions 2.4.1 Operating hours The worst-case scenario of the Terminal operating for 8760 hours per year was assumed for the modelling study. 2.4.2 Summary of Assumptions The assumptions used in the modelling are summarised below.

• Continuous operation was assumed in evaluating the effects of the emissions

• The air dispersion modelling was conducted for normal operations for the various scenarios detailed in section 2.1.

• Emergency Shut Down situations with emissions from flaring have been included for ACG FFD Phase 1, 2, 3 and EOP, and separately for Shah Deniz Stage 1.


• The modelled concentration at pre-determined sensitive receptors has been predicted in the study.

• NO:NO2 ratio. The emissions data are given in the form of NO2. A 50% is assumed, representing a conservative approach.

• The concentration of H2S in the reservoir is not significant therefore SO2 has not been included in the modelling.

3 Results 3.1 Dispersion Model results The spatial distribution of the predicted concentrations of NO2 and CO emitted from the Sangachal Terminal are presented as contour plots in Appendix III. The plots present the results for hourly mean predictions of NO2 for the scenarios modelled. The scenarios modelled include normal operations and the modelling takes into account flaring episodes from ACG, FFD, EOP and, independently, from Shah Deniz.

The peak predicted ground level concentration resulting from Sangachal Terminal emissions from 2004 to 2010 have been assessed for their impact on air quality. This represents the operations of ACG Phase 1, 2, EOP and Shah Deniz and the start up of ACG Phase 3 and the peak production year. The results show the expected concentration at the predetermined receptors.

The background concentration in the area was added to the predicted Process Contribution (PC) from the terminal site to give a Predicted Environmental Concentration (PEC), which has then been compared to the relevant Air Quality Standard (AQS) for NO2 and CO concentrations, as shown in tables 3.1 to 3.12.

Table 3.1: Nitrogen Dioxide

EOP in normal operation (2004) Air

Quality Std.

Back ground

Process Contribution

Total Concentration

Compliant Receptor

ugm-3 ugm-3 ugm-3 ugm-3 yes/no Maximum hourly average

Cement camp 200 6.0 55.9 61.9 yes Sangachal Town

200 8.0 65.7 73.7 yes

West Hill herders

200 6.0 34.9 40.9 yes

Cheyildag 200 6.0 61.8 67.8 yes Peak concentration

200 8.0 70.0 78.0 yes

Maximum 24 hr Average Cement camp 150na na 12.8 na na


Air Quality

Std.

Back ground


Total Concentration

Compliant

Sangachal Town

na na 24.2 na na

West Hill herders

na na 17.7 na na

Cheyildag na na 19.6 na na Peak na na 30.0 na na

Forecast Annual Average Cement camp 40 4.0 0.4 4.4 yes Sangachal Town

40 3.0 0.8 3.8 yes

West Hill herders

40 3.0 0.7 3.7 yes

Cheyildag 40 3.0 0.6 3.6 yes Peak 40 4.0 1.6 5.6 yes

ACG Phase 1, 2, EOP and Shah Deniz in normal operation (2007) Air

Quality Std.

Back ground


Total Concentration

Compliant Receptor



200 8.0 65.7 73.7 yes

West Hill herders

200 6.0 34.9 40.9 yes


Maximum 24 hr Average Cement camp 150 na 21.5 na na Sangachal Town

na na 25.9 na na

West Hill herders

na na 18.6 na na



40 3.0 1.3 4.3 yes

West Hill herders

40 3.0 1.4 4.4 yes



ACG Phase 1, 2, EOP and Shah Deniz in normal operation plus ACG Phase 3 Start up (2008)

Air Quality

Std.

Back ground


Total Concentration

Compliant Receptor



200 8.0 65.7 73.7 yes

West Hill herders

200 6.0 34.9 40.9 yes



na na 26.0 na na

West Hill herders

na na 18.6 na na



40 3.0 1.4 4.4 yes

West Hill herders

40 3.0 1.4 4.4 yes



ACG Phase 1, 2, 3 EOP and Shah Deniz in normal operation (2010) Air

Quality Std.

Back ground


Total Concentration

Compliant Receptor



200 8.0 67.7 71.7 yes

West Hill herders

200 6.0 34.9 40.9 yes



na na 26.2 na na

West Hill herders

na na 18.6 na na



40 3.0 1.5 4.5 yes

West Hill herders

40 3.0 1.5 4.5 yes



ACG Phase 1, 2, 3 EOP and Shah Deniz operation with the addition of emergency shut down of ACGFFD via elevated flare at a rate of 100mmscfd for 1 hour

Air Quality

Std.

Back ground


Total Concentration

Compliant Receptor



200 8.0 67.7 71.7 yes

West Hill herders

200 6.0 34.0 40.0 yes



na na 26.2 na na

West Hill herders

na na 18.6 na na



40 3.0 1.5 4.5 yes

West Hill herders

40 3.0 1.5 4.5 yes



ACG Phase 1, 2, 3 EOP and Shah Deniz operation with the addition of emergency shut down of Shah Deniz via ground flare at a rate of 990 mmscfd

Air Quality

Std.

Back ground


Total Concentration

Compliant Receptor



200 8.0 67.7 71.7 yes

West Hill herders

200 6.0 34.9 40.9 yes



na na 26.2 na na

West Hill herders

na na 18.6 na na



40 3.0 1.5 4.5 yes

West Hill herders

40 3.0 1.5 4.5 yes



Table 3.2 Carbon Monoxide

EOP in normal operation (2004) Air

Quality Std.

Back ground


Compliant Receptor

ugm-3 ugm-3 ugm-3 yes/no Maximum hourly average

Cement camp 30,000 na 10.4 yes Sangachal Town

30,000 na 9.0 yes

West Hill herders

30,000 na 5.9 yes

Cheyildag 30,000 na 12.3 yes Peak 30,000 na 17.0 yes

Maximum 24 hr Average Cement camp na na 2.1 na Sangachal Town

na na 3.2 na

West Hill herders

na na 2.4 na

Cheyildag na na 3.6 na Peak na na 5.4 na

ACG Phase 1, 2, EOP and Shah Deniz in normal operation (2007)

Air

Quality Std.

Back ground


Compliant Receptor



30,000 na 9.1 yes

West Hill herders

30,000 na 11.3 yes



na na 3.3 na

West Hill herders

na na 5.6 na



ACG Phase 1, 2, EOP and Shah Deniz in normal operation plus ACG Phase 3 start up (2008)

Air Quality

Std.

Back ground


Compliant Receptor



30,000 na 9.1 yes

West Hill herders

30,000 na 11.3 yes



na na 3.3 na

West Hill herders

na na 5.6 na


ACG Phase 1, 2, 3 EOP and Shah Deniz in normal operation (2010) Air

Quality Std.

Back ground


Compliant Receptor



30,000 na 9.1 yes

West Hill herders

30,000 na 11.3 yes



na na 3.3 na

West Hill herders

na na 5.6 na



ACG Phase 1, 2, 3 EOP and Shah Deniz operation with the addition of emergency shut down of ACG FFD via elevated flare at a rate of 100mmscfd for 1 hour

Air Quality

Std.

Back ground


Compliant Receptor



30,000 na 9.1 yes

West Hill herders

30,000 na 11.3 yes



na na 3.3 na

West Hill herders

na na 5.6 na


ACG Phase 1, 2, 3 EOP and Shah Deniz operation with the addition of emergency shut down of Shah Deniz via ground flare at a rate of 990 mmscfd

Air Quality

Std.

Back ground


Compliant Receptor



30,000 na 9.1 yes

West Hill herders

30,000 na 11.3 yes



na na 3.3 na

West Hill herders

na na 5.6 na



4 Conclusions The air dispersion modelling has been carried out for the current operation of EOP at Sangachal Terminal and the proposed future development of ACG FFD Phase 1, 2 and 3 and Shah Deniz Stage 1.

Normal operation and emergency/upset conditions resulting in flaring have been modelled.

The results show that under all plant conditions air quality, including NO2, CO, will be acceptable with respect to air quality standards.


REFERENCES

1. PSA Compliance Testing Dames & Moore 31648-019-456 July 1999

2. AIOC Air Quality Survey 2000 bp R. Finney

3. UK Technical Guidance of Local Air Quality Management TG4; Pollution Specific Guidance

4. DETR 1998 NO:NO2 ratio

5. AIOC onshore and offshore crude oil production operations BP August 2000

6. Dispersion Modelling during FFD of Shah Deniz facilities and in combination with AIOC Sangachal operations R. Finney Dec.2000

7. Emissions and your Licence to Operate A guide for assessing releases to the environment Published by the institute of Chemical Engineers for the Environmental Analysis Co-operative 1999

8. BR-2GZZZZ-EV-REP-0305. ACG FFD Phase 2 and Shah Deniz Air dispersion modelling

APPENDIX I Plot Layout at Sangachal Terminal

BTC SD and Phase 1 Flare Area

SDSD

Stage 1 Phase 1

Stage 2

Stage 3

Phase 3 2

EOP Terminal

APPENDIX II CONTOUR PLOTS

1) EOP in normal operation (2004)-Hourly concentrations NO2

2) ACG Phase 1, 2, EOP and Shah Deniz in normal operation (2007) – Hourly Concentrations NO2

3) ACG Phase 1, 2, EOP and Shah Deniz in normal operation plus ACG Phase 3 Start up (2008)-Hourly Values NO2

4) ACG Phase 1, 2, 3 EOP and Shah Deniz in normal operation (2010)-Hourly Concentrations NO2

5) ACG Phase 1, 2, 3 EOP and Shah Deniz operation with the addition of emergency shut down of ACG FFD via elevated flare at a rate of 100mmscfd for 1 hour -Hourly Concentrations NO2

6) ACG Phase 1, 2, 3 EOP and Shah Deniz operation with the addition of emergency shut down of Shah Deniz via ground flare at a rate of 990 mmscfd – Hourly Concentrations of NO2

APPENDIX III WIND ROSE

WIND ROSE PLOT

Station #37472 - ,

NORTH

SOUTH

WEST EAST

4%

8%

12%

16%

20%

Wind Speed (m/s)

> 11.06

8.49 - 11.06

5.40 - 8.49

3.34 - 5.40

1.80 - 3.34

0.51 - 1.80

COMPANY NAME

Halliburton KBRMODELER

Paul Hill

PLOT YEAR-DATE-TIME

1999 Jan 1 - Dec 31Midnight - 11 PM

DATE

22/Jan/2002

DISPLAY

Wind SpeedUNIT

m/s

CALM WINDS

18.69%AVG. WIND SPEED

6.38 m/s

COMMEN TS

PROJECT/PLOT NO.

Sangachal Terminal

ORIENTATION

Direction(blowing from)

WRPLOT View 3.5 by Lakes Environment al S of tware - www.lakes-env ironmental.com

APPENDIX IV INPUT SOURCE DATA NO2

APPENDIX V INPUT SOURCE DATA CO

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Offshore Air Dispersion Modelling Results Report ACG Phase 3 Project Doc. No.: AM-3GZZZZ-EV-REP-0028 REV. A1

ACG Phase 3 Full Field

Development

ACG PHASE 3 Offshore Air Dispersion Modelling Results Report

A1 Issued for Comment PH AD PH Rev Date Reason for Issue Prepared by Checked by Approved by Notes: Category Code Description Area Code 3GZZZZ General

Document Type REP Report

System No 00 General

Life Cycle A

Contractor Area Code Disc Document Type

Sequence No

Sht Rev

AM 3GZZZZ EV REP 0028 A1


Table of Contents

1 INTRODUCTION.................................................................................................. 7

1.1 ASSESSMENT BASIS.......................................................................................... 7 1.2 ACG FFD PROJECT BACKGROUND ................................................................... 7 1.3 SHAH DENIZ PROJECT BACKGROUND ................................................................. 9 1.4 ONSHORE –SANGACHAL TERMINAL .................................................................... 9

1.4.1 Early Oil Project........................................................................................ 9 1.4.2 ACG FFD................................................................................................ 10 1.4.3 Shah Deniz............................................................................................. 10

2 METHODOLOGY............................................................................................... 11

2.1 SCENARIOS .................................................................................................... 11 2.2 EMISSION DATA............................................................................................... 12

2.2.1 Terminal Complex .................................................................................. 12 2.2.2 Process data .......................................................................................... 13

2.3 MODELING APPROACH .................................................................................... 13 2.3.1 Air Dispersion Model .............................................................................. 13 2.3.2 Meteorological data ................................................................................ 14 2.3.3 Buildings and Topography...................................................................... 14 2.3.4 Receptors and Contours......................................................................... 14 2.3.5 Baseline Air Quality ................................................................................ 14 2.3.6 Air Quality Standards and Guidelines..................................................... 15

2.4 ASSUMPTIONS ................................................................................................ 15 2.4.1 Operating hours...................................................................................... 15 2.4.2 Summary of Assumptions....................................................................... 15

3 RESULTS .......................................................................................................... 16

3.1 DISPERSION MODEL RESULTS.......................................................................... 16

4 CONCLUSIONS................................................................................................. 25

1 INTRODUCTION................................................................................................ 42

2 INPUT INFORMATION ...................................................................................... 42

2.1 MODEL USED ................................................................................................. 42 2.2 AVERAGING TIMES .......................................................................................... 42 2.3 SOURCE INPUTS ............................................................................................. 42 2.4 RECEPTORS ................................................................................................... 42 2.5 METEOROLOGICAL DATA ................................................................................. 42

3 DISPERSION ISOPLETHS................................................................................ 43

4 RESULTS .......................................................................................................... 56


1 INTRODUCTION

A preliminary offshore dispersion model has been run to update the modelling undertaken during the Phase 1, 2 and Shah Deniz Define Phases. The scope of this work includes only the offshore perspective.

2 INPUT INFORMATION

The following data has been used to enter into the air dispersion modelling suite of programs.

2.1 Model Used

The model used by BP is the Lakes Environmental ISC AERMOD programme version 4.03.

2.2 Averaging times

One, eight and twenty-four hour averaging times were run for the cases considered.

2.3 Source Inputs The main source of air emissions from the region are in the form of exhausts due to the running of RB211s and as a result of operational flaring. Emissions to atmosphere are based on normal operations. The spare gas turbines being online were not considered. The fuel used by the RB211s is the platform fuel gas. Some of the units are configured to run on diesel but this is considered to be insignificant, as only one unit will be running while the others are shutdown.

2.4 Receptors

There are no nearby external receptors that are affected by emissions from the platforms. The elevation reference for the ambient concentrations is at 25m above sea level

2.5 Meteorological Data The worst possible meteorological conditions that could prevail are used. The metdata is automatically generated by the ISC-AERMOD program. Other sequential hourly metdata for the proposed ACG3 offshore location is unavailable.


3 DISPERSION ISOPLETHS

Dispersion isopleths are provided as an indication of the type of NO2 pollutant concentrations that may be expected in the region.


C:\lakes input data\ACG3\PSA_nFlr\PSA_NFLR.IS\01H1GALL.PLTPOST View - Lakes Environmental Software

PROJECT NO. :

30.

27

DATE :

21/01/2004

PROJECT TITLE :

ACG3 FFDPLOT FILE OF HIGH 1ST HIGH 1-HR VALUES FOR SOURCE GROUP: ALL

COMMENTS :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

571.94617

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :

CONC, RURAL, FLAT, FLGPOL, NOSTD, NOCMPL

517.

78

301.

11

84

84

84

84

139

139

139

139

139139

139

193

193

193

247

247

301

301355409

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

21/01/2004

C:\LAKES INPUT DATA\ACG3\PSA_NFLR\PSA_NFLR.IS\01H3GALL.PLTPOST View - Lakes Environmental Software

PROJECT TITLE :

ACG3 FFDPLOT FILE OF HIGH 3RD HIGH 1-HR VALUES FOR SOURCE GROUP: ALL

COMMENTS :

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

505.34268

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


457.

56

266.

45 2

7.56

75

75

75

75

75

75

75123

123

123

123 123

171

171

171

219

26631

4

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

21/01/2004


PROJECT TITLE :


COMMENTS :

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

246.2856

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


223.

05

130.

09 1

3.90

37

60

60

60

60

60

60

60

60

60

6060

60

60

84

8484

84

84

84

107

107

107

130

130

153

153

177

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

21/01/2004


PROJECT TITLE :


COMMENTS :

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

198.37711

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


179.

80

105.

50 1

2.61

31.1

9

31.19

31.19

49.77

49.77

49.77

49.7749.77

49.77

49.77

49.77

49.77

49.77

49.77

68.34

68.34

68.3

4

68.34 68.34

86.92

86.92

105.50

105.50

124.0

7

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

21/01/2004


PROJECT TITLE :


COMMENTS :

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

189.6234

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


171.

82

100.

61 1

1.60

29

29

47

47

47

4747

47

47

47

47

47

47

47

47

6565

65

65

83

83

83

101

101

118

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

21/01/2004


PROJECT TITLE :


COMMENTS :

RB211No flaring25m elevation

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

119.85069

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


108.

75

64.3

6 8

.86

20 20

20

2020

20

31

3131

31

31

31

31

31

31

31

31

42

42

42

53

53

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

20/01/2004

C:\lakes input data\ACG3\FFD_ofs\OFFSHRE.IS\01H1GALL.PLTPOST View - Lakes Environmental Software

PROJECT TITLE :


COMMENTS :

RB211 s plus operational flaring resulting in 30g/s NOx Elevation 25m with generated worst data

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

442.25916

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :

CONC, RURAL, FLAT, FLGPOL, DFAULT, NOCMPL

378.

23

220.

94 2

4.32

103

103

103103103

103

103

103

103

103

103

103

103

142

142

142

142

182

182

182

22126

0

300

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

20/01/2004

C:\LAKES INPUT DATA\ACG3\FFD_OFS\OFFSHRE.IS\01H3GALL.PLTPOST View - Lakes Environmental Software

PROJECT TITLE :


COMMENTS :

RB211 plus operational flaring resulting in 30g/s NOxElevation 25m worst met data

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

423.1825

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


382.

97

222.

12 2

1.05

61

61

61

101

101

101

101

101

101

101

101

101

142

142

142

142

182

182 222

262

303

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

20/01/2004


PROJECT TITLE :


COMMENTS :

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

259.65347

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


235.

19

137.

35 1

5.05

40

64

64

64

64

64

64

64

64

64

64

64

6464

88

88

88

88

88

88

113

113

113

113 137

137

162

162

186

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

20/01/2004


PROJECT TITLE :


COMMENTS :

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

205.69717

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


200.

00

120.

00 2

0.00

40

40

40

40

40

40

60

60

60

60

60

60 60

60

80

80

80

80

80

80

100100

120

120140

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

20/01/2004


PROJECT TITLE :


COMMENTS :

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

195.41154

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


177.

04

103.

56 1

1.71

30

48

48

4848

48

48

48

48

48

48

48

48

48 4867

67

6767

67

67

67

85

85

85

104

104

122

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


DATE :

20/01/2004


PROJECT TITLE :


COMMENTS :

PROJECT NO. :

SCALE :

0 5 km

MODELER :

Paul Hill

COMPANY NAME :

AMEC

MAX :

124.46087

UNITS :

ug/m**3

OUTPUT TYPE :

CONC

RECEPTORS :

1335

MODELING OPTIONS :


112.

86

66.4

8 8

.50

20

20

20

20

20

20

32

32

32

32

32

3232

32

32

32

43

4343

55

55

9500000 9510000 9520000 9530000 9540000 9550000

4430

000

4440

000

4450

000


4 RESULTS The following results show the level of expected NOx (uncorrected/corrected) due to the operation of the projects enclosed by the PSA (CA-PDQ, CA-CWP, WA-PDQ, EA-PDQ, DWG-DUQ, DWG-PCWU, EOP). The operational flaring numbers are based on CWP and PCWU platforms flaring and releasing 30g/s of pollutant. Correction to NOx levels, as described in the Phase1, 2 and Shah Deniz report has been applied. NOX Levels ug/m3 1 hour 8 hour 24 hour No flaring 1st 3rd 1st 3rd 1st 3rd Uncorrected max conc. 572 505 246 198 189 120 corrected conc. 286 252.5 123 99 94.5 60 Operational Flaring Uncorrected max conc. 442 423 260 195 corrected conc. 221 211.5 130 0 97.5 0

acg ffd phase 3 & shah deniz air dispersion modelling acg...

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