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This document is the property of Eni Australia B.V.

Confidentiality shall be maintained at all times. This document will be deemed uncontrolled when printed.

REVISION HISTORY

Rev. Date Nr. of

sheets

Description

00 07/02/17 125 Issued for Comments

01 14/02/17 128 Re-Issued for Comments

02 27/02/17 99 Final Issue

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TABLE OF CONTENTS

1. EXECUTIVE SUMMARY ........................................................................................ 7

2. INTRODUCTION .................................................................................................. 8

2.1 Project background ...................................................................................... 8

2.2 Purpose of the report ................................................................................... 9

3. OVERVIEW OF YELCHERR GAS PLANT ............................................................... 11

3.1 General overview ........................................................................................ 11

3.2 Plant configuration ...................................................................................... 11

3.3 Other facilities ............................................................................................ 14

4. PRODUCTION .................................................................................................... 16

4.1 Overview ................................................................................................... 16

4.2 Condensate ................................................................................................ 16

4.3 Gas production ........................................................................................... 17

4.4 Gas composition ......................................................................................... 18

5. ATMOSPHERIC EMISSIONS ............................................................................... 20

5.1 Overview of atmospheric emissions ............................................................... 20

5.2 Fuel gas consumption .................................................................................. 20

5.3 Flaring ....................................................................................................... 23

5.4 Diesel usage .............................................................................................. 26

5.5 Stack emission monitoring ........................................................................... 27

5.6 Air Emissions Assessment Report .................................................................. 28

5.7 Pollutant inventory ...................................................................................... 28

5.8 Fugitive emissions assessment ..................................................................... 29

6. LIQUID WASTE DISCHARGES ............................................................................ 30

6.1 Produced water .......................................................................................... 30

6.1.1 Overview ........................................................................................... 30

6.1.2 Discharge and routine monitoring .......................................................... 30

6.1.3 Quarterly chemical characterisation ....................................................... 31

6.1.4 Produced Formation Water Plan............................................................. 32

6.1.5 Annual Marine Monitoring ..................................................................... 32

6.2 Treated Wastewater Effluent ........................................................................ 32

6.3 Stormwater ................................................................................................ 33

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7. SOLID WASTE ................................................................................................... 34

8. GROUND WATER ............................................................................................... 35

8.1 Ground water use ....................................................................................... 35

8.2 Ground water monitoring ............................................................................. 35

9. INCIDENTS AND NON-CONFORMANCES ............................................................ 37

9.1 Incidents and non-compliances ..................................................................... 37

9.2 Complaints ................................................................................................ 40

9.3 Audits and inspections ................................................................................. 40

9.4 Continuous improvement and other activities ................................................. 40

10. COMMUNITY INITIATIVES ................................................................................ 41

11. ACRONYMS ....................................................................................................... 42

12. REFERENCES ..................................................................................................... 44

TABLES

Table 3.1: YGP Coordinates ......................................................................................... 11

Table 3.2: YGP process area functionality ...................................................................... 13

Table 4.1: Overview of production ................................................................................ 16

Table 4.2: Blacktip reservoir fluid properties .................................................................. 18

Table 4.3: Contaminants in Blacktip Gas ....................................................................... 18

Table 5.1: Gas flow meters ......................................................................................... 20

Table 5.2: Gas consumption at YGP .............................................................................. 20

Table 5.3: Gas flared at YGP ........................................................................................ 23

Table 5.4: Annual diesel consumption and GHG emissions .............................................. 26

Table 5.5: Air emissions improvement plan ................................................................... 28

Table 6.1: Produced water discharge annually ............................................................... 31

Table 6.2: Treated wastewater effluent reuse ................................................................ 32

Table 7.1: Waste disposal ........................................................................................... 34

Table 8.1: Total annual volume of groundwater abstracted .............................................. 35

Table 9.1 : Environmental non-compliances ................................................................... 37

Table 9.2 : Environmental notifications to NTEPA ............................................................ 39

Table G.1: Quarterly groundwater monitoring data 2016 ................................................. 88

Table G.2: Results of further groundwater investigations ................................................. 95

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FIGURES

Figure 2.1: Blacktip Field location ................................................................................... 8

Figure 2.2: Yelcherr Gas Plant and Offshore Pipeline Facilities ............................................ 9

Figure 3.1: Blacktip YGP layout ..................................................................................... 12

Figure 3.2: YGP Process Block Diagram .......................................................................... 14

Figure 4.1: Overview of production ................................................................................ 16

Figure 4.2: Gas production in 2015 ............................................................................... 17

Figure 4.3: Gas production in 2016 ............................................................................... 17

Figure 5.1: Gas consumed for compressors and power generation in 2015 ......................... 21

Figure 5.2: Gas consumed for compressors and power generation in 2016 ......................... 21

Figure 5.3: GHG emissions from gas consumed by compressors and power generation in

2015 ......................................................................................................... 23

Figure 5.4: GHG emissions from gas consumed by compressors and power generation in

2016 ......................................................................................................... 23

Figure 5.5: Volume of gas flared from Blacktip YGP in 2015 .............................................. 24

Figure 5.6: Volume of gas flared from Blacktip YGP in 2016 .............................................. 24

Figure 5.7: GHG emissions from flaring in 2015 .............................................................. 25

Figure 5.8: GHG emissions from flaring in 2016 .............................................................. 26

Figure 6.1: Volume of produced formation water discharged from Blacktip YGP ................... 31

Figure 8.1: Groundwater abstraction and monitoring bores .............................................. 35

Figure G.1: Groundwater trends – pH............................................................................. 90

Figure G.2: Groundwater trends – EC ............................................................................. 90

Figure G.3: Groundwater trends – TDS ........................................................................... 91

Figure G.4: Groundwater trends – turbidity ..................................................................... 91

Figure G.5: Groundwater trends – total suspended solids ................................................. 91

Figure G.6: Groundwater trends – biochemical oxygen demand ......................................... 92

Figure G.7: Groundwater trends – dissolved oxygen ........................................................ 92

Figure G.8: Groundwater trends – oil in water ................................................................. 92

Figure G.9: Groundwater trends – NOx .......................................................................... 93

Figure G.10: Groundwater trends – Total P ....................................................................... 93

Figure G.11: Groundwater trends – Total N ...................................................................... 93

Figure G.12: Groundwater trends – Ammonia ................................................................... 94

Figure G.13: Groundwater trends – E.Coli ........................................................................ 94

Figure G.14: Twice-weekly groundwater level ................................................................... 98

Figure G.15: Twice-weekly groundwater conductivity trends ............................................... 98

Figure G.16: Twice-weekly groundwater pH trends ............................................................ 99

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APPENDICES 46

Appendix A: Annual Return 47

Appendix B: Pollutant Mass Inventory 65

Appendix C: Emissions Sampling Results 71

Appendix D: Produced Water Monitoring Results 76

Appendix E: WWTP Sampling Results 81

Appendix F: Stormwater Monitoring Results 84

Appendix G: Groundwater Monitoring Data 87

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1. EXECUTIVE SUMMARY

The Blacktip Annual Environmental Performance Report 2016 summarises the

environmental performance of the Yelcherr Gas Plant for the reporting period 10

February 2016 to 9 February 2017 as required by condition 40 of the Environment

Protection Licence EPL57-02, which is currently in force. EPL57-02 was issued to Eni

on 10 February 2015 as an amendment to the previous licence, EPL57-01. The

Report includes the Annual Return in Appendix A, which provides an overview of

compliance against the Licence as required by condition 38.

The findings of the compliance assessment against the Licence are as follows:

65 conditions were compliant;

18 conditions were non-compliant; and

10 conditions deemed not applicable to current activities.

Key findings are summarised below:

Produced water:

- One exceedance of the oil in water and total suspended solids limits was

reported in December 2016.

- The quarterly discharge sample for Q3 was not tested.

- Due to the unavailability of site water analyzers, a number of parameters

could not be measured on site until the second half of 2016.

Treated sewage wastewater:

- One exceedance of the E Coli licence limit was reported, however this was

later attributed to elevated temperatures during transport.

Stormwater:

- All discharge test results were within the EPL limit for OIW.

- Although testing has been undertaken on a regular basis, data for some

parameters was not available.

Groundwater:

- E.Coli was below detection in all samples taken during the reporting

period.

Air emissions monitoring:

- CO from the generators ranged from 980 to 1,500 mg/m3 and exceeded

the EPL limit of 100 mg/m3, however this is in line with manufacturer

specifications and revision of the limit is under discussion with NTEPA.

- All other emissions concentrations were within licence limits.

- The total CO emissions (by mass) exceeded the EPL limits for the power

generators and emergency diesel generator. Revision of this limit is under

discussion with NTEPA.

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2. INTRODUCTION

2.1 Project background

Eni Australia B.V. (Eni) is operator of the Blacktip Gas Project. The development

consists of a small unmanned offshore wellhead platform, a subsea pipeline

bringing whole well stream fluid, (i.e. gas, condensate and produced water) to

Yelcherr Beach and the Yelcherr Gas Plant (YGP) near Wadeye in the Northern

Territory (Figure 2.1 and Figure 2.2). The processed gas is exported via an onshore

export pipeline, by Australian Pipeline Trust, to the customer, Power and Water

Corporation.

Production commenced on 26 August 2009. The operation of the YGP is licensed

under the Environmental Protection Licence (EPL), EPL57, issued by the former

Department of Natural Resources, Environment, The Arts and Sport (NRETAS) (now

Northern Territory Environment Protection Authority (NT EPA)) on 11 August 2009.

EPL57-01 was issued to Eni on 16 December 2010 as an amendment to EPL57.

EPL57-02 (the current licence) was issued to Eni on 10 February 2015 as an

amendment to EPL57-01.

Figure 2.1: Blacktip Field location

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Figure 2.2: Yelcherr Gas Plant and Offshore Pipeline Facilities

2.2 Purpose of the report

This report summarises the environmental performance of the YGP for the reporting

period 10 February 2016 to 9 February 2017, as required by condition 40 of the

EPL.

This report has been prepared in accordance with requirements under condition 41

of the EPL, outlined below.

Clause EPL condition Section in

this report

41.1 include a description of gas plant infrastructure and

processes

3.1

41.2 report on total condensate produced and total gas processed

by the gas plant

4

41.3 report on quality of gas received by the plant; 4.4

41.4 include a tabulation of all monitoring data required as a

condition of this Licence, including:

discharge,

groundwater and

air emissions monitoring;

6

8

5

41.5 include a trend analysis and interpretation of all monitoring

data required as a condition of this Licence;

Various

41.6 include long term trend analysis of monitoring data to

demonstrate any environmental impact associated with the

Various

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Activity over a minimum period of three years;

41.7 identify the number of exceedances of

discharge/concentration trigger values that have occurred

during the reporting period;

9

41.8 report on the following associated with discharges:

total annual discharges (ML/year);

frequency and volume of Produced Formation Water

discharges;

6

41.9 report the total annual emissions of the following

parameters, for each emission point, as well as for

condensate tanks and fugitive emissions:

NOx;

SO2;

VOC;

PM10;

5

41.10 report in accordance with the requirements for a Monitoring

Report identified in Guidelines for Consultants Reporting on

Environmental Issues (as amended from time to time),

available from:

http://www.ntepa.nt.gov.au/__data/assets/pdf_file/0005/13

6481/guidelines_consultants_reporting_environmental_issue

s.pdf

n/a

http://www.ntepa.nt.gov.au/__data/assets/pdf_file/0005/136481/guidelines_consultants_reporting_environmental_issues.pdf



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3. OVERVIEW OF YELCHERR GAS PLANT

3.1 General overview

In accordance with condition 41.1 of the EPL, this section provides a description of

the gas plant infrastructure and processes.

Infrastructure at the YGP includes:

a gas processing plant consisting of a slug catcher and pig receiver, separation,

gas dehydration, compression, condensate storage and produced water

treatment facilities

the onshore portion of an 18“ carbon steel, multi-phase pipeline bringing

produced fluids from the offshore gas field to the YGP, starting from the shore

crossing

the onshore portion of a condensate export pipeline from the condensate storage

facilities at the YGP to the shore crossing

a portion of the onshore gas export pipeline that runs from the gas processing

plant to a custody transfer meter at the boundary of the YGP site.

3.2 Plant configuration

After processing, un-odorised natural gas at agreed specifications is delivered to the

customer via an onshore export pipeline to a custody transfer meter at the

boundary of the YGP.

Stabilised condensate is stored on site at the YGP before being exported to the SPM

for offload via tankers.

The production life of the field is planned to be 25 years based on initial gas sales

contract. The design life of the Blacktip YGP is 30 years.

The entire YGP site occupies an area of 750 m by 750 m, with the main process

facility located to the south of the site (occupying an area of approximately 250 m

by 380 m) and the accommodation, warehouse, offices and control room to the

north (see Figure 3.1). The coordinates of the YGP are shown in Table 3.1.

Table 3.1: YGP Coordinates

Corner

GDA 1994 GDA 1994 MGA Zone 52

East North mE mN

W 129°25'52.09" 14°14'33.60" 546 510 8 425 393

N 129°26'05.87" 14°14'13.22" 546 924 8 426 018

E 129°26'26.77" 14°14'26.66" 547 549 8 425 604

S 129°26'12.99" 14°14'47.04" 547 135 8 424 979

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Figure 3.1: Blacktip YGP layout

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The YGP process facility is divided into four main areas, namely:

Inlet Separation;

Gas Processing and Treatment;

Condensate Processing; and

Produced Formation Water Treatment.

The YGP is also self-sufficient in all utilities required to allow continuous manned

operation for the hydrocarbon processing. The functionality for the process areas in

the YGP is summarised in Table 3.2 and illustrated in Figure 3.2.

Table 3.2: YGP process area functionality

Process Area

Inlet Facilities Gas Processing

Condensate

Processing PFW Treatment

Fu

ncti

on

ali

ty

Pig Receiver Inlet Separation Dewatering PFW Degasser /de-

oiler

Slug catcher and

bulk gas liquid

separation

Gas Dehydration

and Conditioning Stabilisation

Dispersed oil

removal - Air

Induced Floatation

Units

Sales Gas

Compression and

Export

Storage and Export

Pumping PFW Discharge Point

Gas Sales and

Fiscal Metering

The YGP includes a slug catcher facility for the receipt of the multiphase production

fluids from the offshore gas field. The process is essentially divided into two streams:

a gas processing stream and produced liquids processing stream.

The gas processing route uses a Triethylene Glycol (TEG) absorption process system

to extract condensed water from the gas stream. Further treatment of the gas stream

via the Joule-Thompson pressure-temperature reduction process for additional liquids

separation process downstream of the TEG-glycol system is applied to the gas stream

to meet the export gas dewpoint specifications. Thereafter, the gas is compressed

before it is exported via a custody transfer meter.

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Liquids stream removed from the slug catcher are further separated in two stages:

medium pressure (MP) followed by a low pressure (LP) separation system. The

stream entering the LP separator is heated to flash off lighter components in the liquid

stream in order to meet the condensate vapour pressure (RVP) specification prior to

being rundown to condensate storage tank, and subsequently load-out to tanker at

the SPM.

Produced water separated from the liquids stream is further processed in the PFW

system to remove free oil prior to disposal at sea.

Figure 3.2: YGP Process Block Diagram

The YGP is designed to export at up to 128 MMscfd of sales gas under steady state

conditions on a continuous basis. This capacity exceeds the contractual maximum

daily quantity of 103 MMscfd, to provide daily operating flexibility to meet changing

gas nominations.

3.3 Other facilities

Other key facilities on site include:

Utilities system – including:

- Power generation;

- Compressed air system;

- Potable water system;

- Chemical injection;

- Stormwater drainage;

- Sewage treatment plant and effluent reuse;

Inlet

Separation

Gas

Dehydration

Package

(Glycol

Gas/Gas

Exchanger

Gas

Compressors

Dewpointing

Package

J-T valves/LT

MP

Separator Condensate

LP

Separator

PW

Treatment

System

Bonaparte

Gas

PW

Pipeline

Ocean

Condensate

Export Pipeline

to SPM

HP Fuel

Gas

Fuel

Gas

LP Fuel

Gas

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- Firewater.

Ancillary buildings – including:

- Accommodation;

- Laboratory, workshop and stores;

Hazardous chemicals storage; and

Lighting and security.

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4. PRODUCTION

4.1 Overview

The annual production is provided in Table 4.1 and Figure 4.1.

The total gas and condensate production for the reporting period was approximately

487,900 t and 8,550 t, respectively. Blacktip is licensed for a maximum scale of

1,055,300 tonnes of gas and 50,930 tonnes of condensate per annum.

Table 4.1: Overview of production

20141 20151 20161

Annual gas production (KSCM) 678,866 615,305 636,533

Annual gas production (t) 514,200 467,200 487,900

Condensate production (t) 9,400 8,500 8,550

Total production (t) 523,600 475,700 496,450

Notes: 1 Reporting period is from 1 January – 31 December

Figure 4.1: Overview of production

4.2 Condensate

Two offtakes occurred in April and October 2016, amounting to a total volume of

70,380 bbl (8,554 t) of condensate offloaded.

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4.3 Gas production

Figure 4.2 shows the rate of gas produced from Blacktip for the reporting period. Daily

gas production typically ranged between 1.0 and 2.5 MSCM, with a total of 637 MSCM

being produced in 2016.

Figure 4.2: Gas production in 2015

Figure 4.3: Gas production in 2016

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4.4 Gas composition

The reservoir fluid properties and contaminants are shown in Table 4.2 and Table 4.3.

Table 4.2: Blacktip reservoir fluid properties

Component Percentage

CO2 0.62 mol%

N2 5.88 mol%

Methane 89.06 mol%

Ethane 2.82 mol%

Propane 1.00 mol%

Ibutane 0.12 mol%

Butane 0.23 mol%

Ipentane 0.06 mol%

Pentane 0.05 mol%

Hexanes 0.02 mol%

Heptanes 0.01 mol%

Octanes 0.02 mol%

Nonanes 0.03 mol%

Decanes 0.04 mol%

Undecanes 0.02 mol%

C12+ 0.01 mol%

Source: Ref. [19], [24]

Table 4.3: Contaminants in Blacktip Gas

Component Maximum measured

H2S 3.0 ppmv

Mercaptan <0.5 ppmv

Mercury 0.2 µg/m³

Radon 222 Bq/m³

Argon 0.01 mol%

Oxygen <0.01 mol%

Helium 0.06 mol%

Hydrogen 0.01 mol%

Benzene 0.002 mol%

Toluene 0.002 mol%

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Component Maximum measured

Ethyl Benzene <0.001 mol%

Xylenes 0.001 mol%

Source: Ref. [23], [24]

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5. ATMOSPHERIC EMISSIONS

5.1 Overview of atmospheric emissions

Major sources of atmospheric emissions from the Blacktip YGP are:

Export gas turbine compressors;

Gas engine power generators;

Flaring; and

Diesel usage.

Fuel usage for the compressors and gas engines is monitored continuously, as are gas

quantities flared. Table 5.1 lists the flow meters used for measuring the various gas

streams.

Table 5.1: Gas flow meters

Emission Source Gas Flow Meter Reference Number

Turbine Compressor Compressor A

Compressor B

Compressor C

420.1 FIT 161

420.1 FIT 261

420.1 FIT 361

Engine Generators LP Fuel Gas 420.1 FIT 004

Flare HP Flare 230.1 FQI 008

LP Flare 230.1 FQI 002

Fuel Gas

Distribution

420.1 FQI 007

5.2 Fuel gas consumption

The two main consumers of high pressure (HP) and low pressure (LP) fuel gas are the

gas turbine compressors and power generators. The volume of gas consumed as fuel

during the reporting period is summarised in Table 5.2 and shown in Figure 5.2 and

Figure 5.3.

The average daily and total consumption for the year were approximately 49

KSCM/day and 18 MSCM, respectively.

Table 5.2: Gas consumption at YGP

2014 2015 2016

Daily fuel gas consumption (KSCM) 50.2 47.3 49.2

Total annual fuel gas consumption

(MSCM) 18.3 17.3 18.0

Emissions (t CO2-e) 37,100 34,900 36,500

Notes:

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1 Reporting period is from 1 January – 31 December

Figure 5.1: Gas consumed for compressors and power generation in 2015

Figure 5.2: Gas consumed for compressors and power generation in 2016

0

2

4

6

8

10

12

14

16

18

20

0

10

20

30

40

50

60

70

80

90

Jan-15 Feb-15 Mar-15 Apr-15 May-15 Jun-15 Jul-15 Aug-15 Sep-15 Oct-15 Nov-15 Dec-15

Cu

mala

tive

Co

nsu

mp

tio

n (

MS

CM

)

Dail

y C

on

su

mp

tio

n (

KS

CM

/da

y)

Time

Gas Consumed for Compressor and Power Generation 2015

Daily Cumulative

0

2

4

6

8

10

12

14

16

18

20

0

10

20

30

40

50

60

70

80

90


Cu

ma

lati

ve

Co

ns

um

pti

on

(M

SC

M)

Da

ily C

on

su

mp

tio

n (

KS

CM

/da

y)

Time

Gas Consumed for Compressor and Power Generation 2016

Daily Cumulative

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Total equivalent greenhouse gas (GHG) emissions for gas consumption is shown in

Figure 5.3. These were calculated using equations provided by the National

Greenhouse Accounts Factors for Stationary Energy Emissions (Ref. [3]), as follows:

1000

ijoxecii

ij

EFECQE

Where:

Eij is the emissions of gas type (j), (carbon dioxide, methane or nitrous oxide),

from the fuel type (i), i.e. unprocessed natural gas;

Qi is the quantity of fuel type (i) (m3);

ECi is the energy factor of the fuel type (i), which is given as 39.3 x 10-3 GJ/m3 for

natural gas;

EFijoxecis the emission factor for each gas type (j), measured in kilograms CO2-e

per gigajoule of fuel type (i).

Gas type Emission factor (Kg CO2-e/GJ)

CO2 51.4

CH4 0.1

N2O 0.03

0

5000

10000

15000

20000

25000

30000

35000

40000

0

20

40

60

80

100

120

140

160

180


Cu

ma

lati

ve

Em

iss

ion

s (

ton

ne

s C

O2

-e)

Da

ily E

mis

sio

ns

(to

nn

es

CO

2-e

/da

y)

Time

GHG Emissions from Compressor and Power Generation 2015

Daily Cumulative

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Figure 5.3: GHG emissions from gas consumed by compressors and power

generation in 2015

Figure 5.4: GHG emissions from gas consumed by compressors and power

generation in 2016

5.3 Flaring

The annual volume of gas flared from 2014-2016 is summarised in Table 5.3.

The volume of gas flared and the equivalent GHG emissions during the 2015 and 2016

reporting periods are presented in Figure 5.5, Figure 5.6, Figure 5.7 and Figure 5.8.

Daily and total consumption for 2016 were approximately 8.2 KSCM/day and 2.98

MSCM, respectively, representing a 20% reduction in flaring the previous year despite

an increase in production. This is attributed to fewer plant trips and depressure events

due to increased plant reliability and better coordination of plant maintenance.

Table 5.3: Gas flared at YGP

2014 2015 2016

Daily volume of gas flared (KSCM) 10.3 10.4 8.2

Total volume of gas flared (KSCM) 3,770 3,812 2,983

Estimated emissions (t CO2-e)2 8,200 8,300 6,500

Notes: 1 Reporting period is from 1 January – 31 December 2 Estimate to nearest 100 tonnes.

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Daily Cumulative

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Figure 5.5: Volume of gas flared from Blacktip YGP in 2015

Figure 5.6: Volume of gas flared from Blacktip YGP in 2016

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ma

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nsu

mp

tio

n (

KS

CM

)

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/da

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Gas Flaring 2015

Daily Cumulative

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Total equivalent greenhouse gas (GHG) emissions for flaring is shown in Figure 5.7.

These were calculated using equations provided by the National Greenhouse Accounts

Factors for Stationary Energy Emissions (Ref. [3]), as follows:

ijiij EFQE

Where:

Eij is the emissions of gas type (j), (carbon dioxide, methane or nitrous oxide)

flared (CO2-e tonnes);

Qi is the quantity of fuel type (i) flared (tonnes);

EFij is the emission factor for each gas type (i) flared.

Gas type Emission factor

(tonnes CO2-e/tonnes of fuel flared)

CO2 2.8

CH4 0.8

N2O 0.03

Figure 5.7: GHG emissions from flaring in 2015

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(to

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2-e

/da

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GHG Emissions from Flaring 2015

Daily Cumulative

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Figure 5.8: GHG emissions from flaring in 2016

5.4 Diesel usage

Diesel usage over the reporting period was 39.9 m3, 10.0 m3 of which was used for

transport purposes and 29.9 m3 of which was used for stationary energy purposes.

This equates to GHG emissions of approximately 110 tonnes CO2-e.

Table 5.4: Annual diesel consumption and GHG emissions

2014 2015 2016

Diesel consumption (m3) 58.6 49.5 39.9

Emissions (t CO2-e) 159 134 108

Notes:

Reporting period is from 1 January – 31 December

Total equivalent greenhouse gas (GHG) emissions for diesel consumption was

calculated using equations provided by the National Greenhouse Accounts Factors for

Stationary Energy Emissions (Ref. [3]), as follows:

1000

ijoxecii

ij

EFECQE

Where:

Eij is the emissions of gas type (j), (carbon dioxide, methane or nitrous oxide) from

fuel type (i) (CO2-e tonnes);

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2000

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6000

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(to

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2-e

/da

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Time

GHG Emissions from Flaring 2016

Daily Cumulative

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Qi is the quantity of fuel type (i) (kilolitres);

ECi is the energy content factor of fuel type (i) (GJ/kL)

EFijoxec is the emission factor for each gas type (j) for fuel type (i).

Gas type

Emission factor

(kg CO2-e/GJ)

Diesel fuel combusted for

transport energy purposes

Diesel fuel combusted for

stationary energy purposes

CO2 69.9 69.9

CH4 0.1 0.1

N2O 0.5 0.2

Energy content factor for diesel 38.6 GJ/kL

5.5 Stack emission monitoring

Emissions from the export gas turbine compressors and gas engine power generators

are sampled and analysed for

nitrogen oxides (NOx);

sulphur oxides (SOx);

carbon monoxide (CO);

volatile organic compounds (VOCs);

methane (CH4).

Stack emission monitoring was undertaken on 9 December 2015 and 18 August 2016,

with the most recent monitoring survey undertaken on 15 February 2017, the results

for which will be presented in next years’ report.

A summary of the results is provided in Appendix C. Key results during the reporting

period are as follows:

Carbon monoxide (CO) emission concentrations measured from the generators in

August 2016 ranged from 980 to 1,500 mg/m3 and exceeded the limit of 100

mg/m3 specified in Table 5 under EPL57-02 condition 21. The CO emissions are in

line with the manufacturer specifications and an amendment request has been

submitted to NTEPA to revise this limit.

All other generator pollutant emissions from the generators were within the EPL

limits. In particular, VOCs and methane emissions were very low and particulate

matter were below detection limit.

Nitrogen oxide (NOx) emission concentrations from the generators in August 2016

were within the EPL limits and ranged from 1,500 to 1,700 mg/m3.

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All pollutant emissions measured from the compressors were within the EPL limits.

Particulate matter emissions were also below detection limit.

Compressor A was out of service and therefore not included in the emissions

monitoring.

No visible smoke was reported during the last 12 months.

5.6 Air Emissions Assessment Report

The Air Emissions Assessment Report 000036_DV_PR.HSE.1057.000 was submitted to

NTEPA in 2015 in accordance with Condition 47 of EPL57-02. The report:

Reviews the trends in NOx emissions from the generators; and

Outlines an improvement plan for NOx emissions from the generators.

The improvement plan and current status are outlined below.

Table 5.5: Air emissions improvement plan

Improvement and corrective action Planned

completion Status

Install sampling ports on all three

generator stacks.

1 October

2015

Ports are compliant.

Undertake air dispersion modelling to

characterize the NOx downwind

concentrations.*

31 January

2016

Complete.

Undertake a detailed

engineering/feasibility assessment of

NOx control technology proposed by

selected vendors.

31

December

2016

Complete, final report pending.

*Revised action agreed to by NT EPA on 8 February 2016 (D Spelchan 2016, pers. comm., 8 February).

5.7 Pollutant inventory

Eni reports emissions to atmosphere and the environment via the National Pollutant

Inventory (NPI) and the National Greenhouse and Energy Reporting Scheme (NGERS).

Appendix B provides a comparison against the pollutant mass limits stipulated in the

EPL Appendix 2, Table B.

Key results during the reporting period are as follows:

The annual carbon monoxide (CO) emissions were reported above the EPL limits

(specified in Table B under Appendix 2 of the EPL) for the power generators and

emergency diesel generator. An amendment request has been submitted to NTEPA

to revise the CO limits to reflect normal operation of the equipment.

All other emissions were within the mass limits.

Eni submitted the annual NPI reporting figures via the NPI Online Reporting System on

29 September 2016.

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The annual NGERS reporting figures were submitted to the Department of Climate

Change on 24 October 2016.

5.8 Fugitive emissions assessment

A fugitive emissions campaign was undertaken at the Blacktip Yelcherr Gas Plant and

Well Head Platform in line with US EPA Method 21 for the estimation of fugitive

emissions of methane, using advanced techniques for the screening of potentially

leaking items of equipment.

The results from this campaign are still being finalised, however only a few minor

leaks were identified, and preliminary calculations show a significant reduction in

fugitive emissions compared to the previously estimated values. Further details may

be made available to the NTEPA upon completion of the assessment.

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6. LIQUID WASTE DISCHARGES

6.1 Produced water

6.1.1 Overview

Produced water discharge in this reporting period was 6.2 ML. Annual marine

monitoring was conducted in May 2016 and continues to provide no indication of

adverse impact from produced water discharge.

Three non-compliances were identified:

one exceedance of the oil in water and total suspended solids limits was reported in

December 2016;

the quarterly discharge sample for Q3 was not tested; and

due to the unavailability of site water analyzers, a number of parameters could not

be measured on site until the second half of 2016.

All incidents and non-compliances are listed in Section 9.

6.1.2 Discharge and routine monitoring

Table 6.1 and Figure 6.1 present the annual produced water discharges for the past

three years. Produced water is sampled and tested on site prior to discharge to ensure

the following parameters are within the limits stipulated in Table 6 of EPL57-02:

pH;

Electrical conductivity (EC);

Dissolved oxygen (DO);

Temperature;

Turbidity; and

Oil in water (OIW).

Samples are then taken hourly to ensure water quality remains within the licence

limits. The results are presented in Appendix E.

Key issues identified include:

Due to unavailability of site water analyzers, a number of parameters could not be

measured on site until the second half of 2016, including EC, DO, Temperature,

Turbidity.

There have been issues with the supply of reagent for analysis of dissolved oxygen

using the site multi-parameter unit.

There have been instances of either elevated EC (~600 µs/cm) or turbidity (~800

NTU). This will be investigated further as part of the PFW Plan (see Section 6.1.4).

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Table 6.1: Produced water discharge annually

2014 2015 2016

Volume of produced water

discharged (m3)

1,754 6,179 6,206

Number of discharge days 7 22 22

Notes:

Reporting period is from 1 January – 31 December

Figure 6.1: Volume of produced formation water discharged from Blacktip YGP

6.1.3 Quarterly chemical characterisation

Table A in EPL57-02 stipulates the requirements for characterisation of PW on a

quarterly basis. Sampling was undertaken in March 2016, September 2016, December

2016 and February 2017. The September 2016 sample was collected from the MP

separator and therefore not associated with a discharge. Laboratory results have not

yet been received for monitoring conducted on 6 February 2017. The results are

presented in Appendix E.

Key results are as follows:

Oil in water (OIW) in the quarterly sample taken on 25 May 2016 was measured at

106.9 mg/L. The analysis was undertaken using a TD3100 benchtop fluorometer.

Prior to discharge, site monitoring using a Horiba water analyser measured OIW at

13.5 mg/L. Furthermore, a combination of Gas Chromatography Mass Spectrometry

(GC-MS) and Gas Chromatography Flame Ionisation Detection (GC-FID) measured

TRH and TPH in the same sample at ~9 mg/L and below limits of detection,

0

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800

Jan-14 Apr-14 Jul-14 Oct-14 Jan-15 Apr-15 Jul-15 Oct-15 Jan-16 Apr-16 Jul-16 Oct-16

Oil

in w

ate

r (m

g/L)

Vo

lum

e (

m3

/d)

Produced Formation Water Discharge Volumes 2014-2016

Discharge volume Oil in water content Oil in water limit (25 mg/L)

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respectively. Therefore, the high OIW reading is unlikely to reflect oil contamination

from produced formation water. Anecdotal evidence suggests the presence of

corrosion inhibitor influences OIW measurements by fluorometry.

OIW and total suspended solids (TSS) in the quarterly sample taken on 12

December 2016 were measured at 57.4 mg/L and 84 mg/L, respectively, exceeding

the EPL limits. NTEPA was notified and an incident investigation was subsequently

undertaken to identify the cause, environmental risk and corrective actions. The

receiving environment is known to be well mixed, and the produced water plume

would have rapidly dispersed and mixed into the receiving waters upon discharge,

resulting in rapid dilution and degradation of any hydrocarbons. Therefore the risk

of environmental harm was determined to be low.

Copper was within the EPL limit in all samples.

Zinc was above the trigger value in the sample collected on 25 May 2016, and close

to the limit in the sample collected in 12 December 2016.

Total petroleum hydrocarbons measured by GC-FID (i.e. TPH>C16-C35 aliphatics,

TPH>C35 aliphatics and TPH C16-C35 aromatics) were below the limits of detection

in all samples, suggesting that a proportion of the hydrocarbon content is of

biological origin. A potential source of organic matter is the hazardous open drains

pit, which is connected to the PFW system. The pit is open and collects debris from

the environment.

6.1.4 Produced Formation Water Plan

The Produced Formation Water Plan 000036_DV_PR.HSE.1056.000 was submitted to

NTEPA in accordance with condition 43 of the EPL. NTEPA have requested the Plan to

be modified and resubmitted by 1 April 2017.

6.1.5 Annual Marine Monitoring

Eni has an annual commitment, set out in Produced Water Management Plan

000036_DV_EX.HSE.0381.000_A02, to undertake sediment and shellfish sampling in

the vicinity of the produced water pipeline to monitor any impacts on sediment and

biota. Overall, the results were consistent across the sampling sites, with little

variation between the control and monitoring sites, providing confidence that there are

no adverse impacts from produced water discharge.

6.2 Treated Wastewater Effluent

Wastewater generated at Blacktip YGP is treated in an ABCO Water System 150 EP.

Effluent is reused through an irrigation system to land and a total of 3.0 ML was

discharged over the reporting period.

Table 6.2: Treated wastewater effluent reuse

2014 2015 2016

Effluent reuse (ML) 3.8 3.7 3.0

Notes:

Reporting period is from 1 January to 31 December.

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In accordance with Table A of the EPL, treated discharged wastewater is sampled and

analysed for constituents on a monthly basis by an external laboratory to verify

compliance against the contaminant limits. The results are presented in Appendix F.

Key results are as follows:

One exceedances of the E Coli licence limit in September 2016, which was reported

to NTEPA.

Oil in water, as determined using fluorometry, ranged between 14 mg/L to 24.4

mg/L, above the trigger value of 10 mg/L. However, analysis by gas

chromatography mass spectrometry detected no hydrocarbons.

Consistently no positive readings of hydrocarbons or BTEX. The WWTP is an open

system and uses aeration, hence any BTEX would rapidly volatilise.

BOD levels were slightly above the trigger value of 20 mg/L a few times in the first

half of the year, with the BOD ranging from 15 mg/L to 25 mg/L.

TSS concentrations were above the trigger value of 30 mg/L a few times during the

year, ranging from 26 mg/L to 51 mg/L.

6.3 Stormwater

Stormwater from the utilities and process skids are discharged to grade at SW-02 and

SW-03, respectively. Fire pump test water is sampled each time the pumps are tested,

i.e. typically weekly. Prior to July 2016, the utilities stormwater was fed into the

produced water treatment system and therefore not discharged to grade.

Stormwater from the Open Drains Sump (ODS) is discharged manually to grade. Prior

to discharge, the contents of the sump are sampled and tested for pH, EC and OIW on

site, and samples continue to be taken daily while discharging. In 2016, the ODS

remained closed for the majority of the year and was only opened to grade in late

November during the wet season.

The results are presented in Appendix G. Key findings are as follows:

All discharge test results were within the EPL limit for OIW.

Testing has been undertaken on a regular basis, however gaps have been identified

where data is not available. See Appendix G.

Results of stormwater from utilities (SW-02) are as follows:

- pH ranged between 5.6-7.3;

- electrical conductivity ranged between 102-122 µs/cm; and

- oil in water ranged between 0-3.4 mg/L.

Results of stormwater from the open drains sump (SW-03) are as follows:

- pH ranged between 5.4-6.9;

- electrical conductivity ranged between 51-194 µs/cm; and

- oil in water ranged between 0.9-5.6 mg/L.

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7. SOLID WASTE

Solid waste is managed onsite according the Blacktip Waste Management Plan

(000036_DV_PR.HSE.0832.000_02). Domestic waste from the accommodation village

and crib room is taken to the local West Daly Regional Shire Council Landfill. General

industrial waste and hazardous waste from the plant is transported by a licensed

contractor to Darwin for disposal, treatment, recycling or destruction.

Table 7.1: Waste disposal

2014 2015 2016

Domestic waste to local landfill (t)

Kitchen waste

Accommodation waste

Office waste

5 4 6

Darwin recycling (t) 1 24 13

Darwin disposal – non-hazardous (t) 31 35 14

Darwin disposal – hazardous (t) 3.6 109 90

Notes:


Local Landfill Disposal

This waste comprises predominately kitchen, accommodation and office waste and has

been estimated as approximately 6 tonnes for the reporting period.

Darwin Recycling

Metal is recycled / reused where practicable, and has been estimated as approximately

13 tonnes for the reporting period, comprising of mixed paper, wood and plastic, and

scrap metal.

Darwin Disposal – Non Hazardous

General waste sent back to Darwin for disposal has been estimated at approximately

14 tonnes for the reporting period, comprising of spent non-hazardous chemicals, and

spent cooking oil.

Darwin Disposal – Hazardous

Hazardous waste is managed onsite in accordance with legislation, and generally

consists of waste oil, oily rags, chemical drums and filters. Hazardous and listed

wastes are transported by licensed handlers to facilities approved to handle such

waste in Darwin, Adelaide and Perth. The estimated amount of hazardous waste

removed from site is 90 tonnes for the reporting period, comprising of 40kL of oily

wastewater and other oily wastes.

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8. GROUND WATER

8.1 Ground water use

Groundwater is abstracted for potable water use and ancillary equipment at Yelcherr

Gas Plant. The annual groundwater abstraction volumes are summarised in Table 8.1.

There are also two monitoring bores, BH5 and BH7, located at YGP. The location of the

abstraction and monitoring bores are shown in Figure 8.1.

The increase in groundwater consumption in 2016 is related to an increase in the

frequency of fire pump testing, from monthly to weekly.

Table 8.1: Total annual volume of groundwater abstracted

20141 2015 2016

Groundwater use (ML) 24.5 25.5 46.3

Notes:


Figure 8.1: Groundwater abstraction and monitoring bores

8.2 Ground water monitoring

Condition 28 and Table A in Appendix 3 of EPL57-02 stipulates the requirements

relating to groundwater monitoring.

Groundwater monitoring was conducted on 8 March 2016, 24 May 2016, 7 September

2016 and 7 December 2016. The results and trend analysis are presented in Appendix

H.

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Weekly field measurements are also recorded at each groundwater monitoring bore by

the Thamarrurr Ranger local indigenous group. The Rangers measure the pH, water

level, and electrical conductivity.

The key results are as follows:

Oil in water (OIW) was detected at 73.41 mg/L in BH5 and 18.61 mg/L in March

2016. Additional samples were subsequently taken in April 2016 and analysed for

hydrocarbons by GC-MS. This analysis returned a nil result (see Appendix H). In

subsequent groundwater samples, OIW measurements remained below 9 mg/L.

E.Coli was below detection in all samples taken during the reporting period.

Heterotrophic colony bacteria were detected at both bores. Many types of bacteria

can occur naturally in water and coliform bacteria are common in soils and water.

The World Health Organisation (WHO) advises that HCC alone is not a reliable

indicator of health risk and other tests, such as for E. coli and other fecal coliforms,

are a better indication of whether health risk exists (Ref. [25]). Therefore, the

heterotrophic colony count (HCC) is not of concern.

Low BOD, COD and nutrient levels measured at both sites, although BOD levels

were typically higher in BH5.

Quarterly monitoring, which measured pH at both bores between 5.2 and 6.

The water level ranged between 9 and 13 m at both bores, with the lower readings

measured in Q4 of 2016.

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9. INCIDENTS AND NON-CONFORMANCES

The Waste Management and Pollution Control Act (NT) and EPL require all non-

compliances with the EPL and any potential or actual environmental harm or pollution

event to be recorded and reported to NT EPA.

Pollution is defined in the Waste Management and Pollution Control Act (NT) as:

a) A contaminant or waste that is emitted, discharged, deposited or disturbed or

that escapes; or

b) A contaminant or waste, effect or phenomenon, that is present in the

environment as a consequence of an emission, discharge, deposition or escape

or disturbance of a contaminant or waste.

9.1 Incidents and non-compliances

The Annual Return (Appendix A) details the compliance assessment against the

Environment Licence EPL57-02. The findings are as follows:

65 conditions were compliant;

18 conditions were non-compliant; and

10 conditions deemed not applicable to current activities.

Table 9.1 lists the environmental non-compliances recorded between 10 February

2016 and 9 February 2017. All non-compliances summarised below have been

reported to NTEPA, except the non-compliance against Condition 22. Notifications to

NTEPA are listed in Table 9.2.

Table 9.1 : Environmental non-compliances

Condition Non-compliance

9.1, 9.2, 9.3

Licence

documents

The Blacktip Operations Emergency Response Plan was amended on 10 Feb 2016.

During the NTEPA audit on 28 July 2016, it was identified that the amendment

had not been communicated to NTEPA in accordance with Condition 9.

Subsequently on 14 November 2016, Eni submitted to NTEPA the complete

documentation, including a tabulated summary of the amendments with

document references, reasons for the amendments, and assessment of the

environmental risk associated with the amendments in accordance with Condition

9.

19

Wastewater

discharge limits

Eni has an ongoing water monitoring program to, where possible, verify prior to

discharge that wastewater is within the limits specified in Table 3 under Condition

19.

However, some exceedances were identified:

- 19 July 2016 – E.Coli in treated wastewater

- 6 December 2016 – OIW and TSS in produced water

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21

Air emission

concentration

limits

Carbon monoxide (CO) emission concentrations measured from the generators in

August 2016 ranged from 980 to 1,500 mg/m3 and exceeded the limit of 100

mg/m3 specified in Table 5 under EPL57-02 condition 21. The CO emissions are

in line with the manufacturer specifications.

Revision of the CO limit is under discussion with NTEPA.

22

Annual air

pollutant mass

limits

The annual carbon monoxide (CO) emissions were reported above the EPL limits

(specified in Table B under Appendix 2 of the EPL) for the power generators and

emergency diesel generator. Revision of the CO limits are under discussion with

NTEPA.

24.1

Signage for

terrestrial

monitoring points

Signage has been installed at terrestrial monitoring points.

However, power generators are labelled A, B and C whereas in the EPL57-02 they

are distinguished by numbers no 1, 2, 3. Revision of the EPL is under discussion

with NTEPA, including the generator labels.

26

Discharge

monitoring

Discharge monitoring has been undertaken. However, the monitoring undertaken

was not fully compliant.

The quarterly produced water sample collected on 7 Sept 2016 was not

representative of discharge.

On site monitoring of produced water did not include EC, DO,

Temperature or Turbidity until September 2016, when the equipment was

available on site and operators received training.

DO analysis is still pending further training on the procedure.

On site monitoring of stormwater discharge from the open drains sump

(ODS) and utilities discharge has been conducted on a regular basis,

however gaps have been identified where data is not available:

o 24 July 2016 (utilities)

o 14 Aug 2016 (utilities)

o 4 Dec 2016 (utilities)



o 1 Jan 2017 (utilities)



o 22 Dec 2016 (ODS)

o 26 Dec 2016 (ODS)

o 27 Dec 2016 (ODS)

o 28 Dec 2016 (ODS)

o 1 Jan 2017 (ODS)

o 2 Jan 2017 (ODS)

o 3 Jan 2017 (ODS)

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o 23 Jan 2017 (ODS)

o 24 Jan 2017 (ODS)

o 25 Jan 2017 (ODS)

o 3 Feb 2017 (ODS)

o 5 Feb 2017 (ODS)

o 6 Feb 2017 (ODS)

Refer to Section 6 and Appendices E and G of the Blacktip Annual Environmental

Performance Report 2016 (000036_DV_PR.HSE.1120.000).

34

Notification of

non-compliances

Non-compliance with Condition 22 was identified during the preparation of this

report, and not reported within 24 hours.

43, 44.1, 44.2,

44.5, 44.6, 44.7,

44.8, 44.9, 44.10

The Produced Formation Water Plan For EPL57-02 Condition 43

000036_DV_PR.HSE.1056.000_03 was submitted on 14 July 2016 as agreed with

NT EPA.

NTEPA provided feedback on 22 December 2016 and found it did not comply with

all requirements under Condition 44.

Table 9.2 : Environmental notifications to NTEPA

Date Description

19 July 2016 Oil in water was measured in produced water discharge waters 106.9 mg/L in a

sample collected on 25 May 2016, above the EPL limit of 25 mg/L. However, a

combination of GC-MS and GC-FID measured TRH and TPH in the same sample

at ~9 mg/L and below limits of detection, respectively.

19 July 2016 E.Coli was measured in treated effluent at 2046 MPN E.Coli/100ml in a sample

collected on 11 May 2016, above the EPL limit of 1000 MPN/100 mL.

Investigation with the testing laboratory identified that the May sample was

received at 25°C, whereas the June sample was received at 21°C (see specific

analysis reports attached). March and April results were also <10 MPN/100ml

(results attached) and the respective receiving temperatures were 18°C and

22°C. Therefore, it is believed that temperature during transport was the cause

of the elevated levels in May.

18 August 2016 Air emissions from Compressor A not tested during biannual monitoring due to

the Compressor being out of service. Biannual monitoring will recommence

when Compressor A is brought back online.

18 August 2016 Carbon monoxide (CO) measured in August 2016 from the generators ranged

from 980 to 1,500 mg/m3 and exceeded the limit of 100 mg/m3 specified in

Table 5 under EPL57-02 condition 21. The CO emissions are in line with the

manufacturer specifications and revision of this limit is under discussion with

NTEPA.

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Date Description

30 August 2016 Firewater pump test water discharge not tested for oil in water due to

insufficient solvent. Solvent stocks have been replenished.

30 August 2016 Produced formation water not tested in Q3 2016.

30 August 2016 Wastewater effluent not tested for enterococci between from February to July

2016. This matter was raised with the laboratory services provider and

enterococci testing has recommenced.

6 September 2016 Produced formation water not tested for dissolved oxygen due to the

unavailability of laboratory reagent. Reagent stocks have since been

replenished.

15 November 2016 Leak to ground observed in the base of the waste water irrigation tank. Tank

has since been repaired.

6 December 2016 PFW discharge exceeded TSS and OIW limits. On site laboratory equipment

have been recalibrated.

4 January 2017 A container used for collecting flush water during PFW sampling overflowed to

grade, releasing an estimated 2 m3 PFW to grade. The system was subsequently

reconfigured to eliminate the use of the container for collecting flush water.

9.2 Complaints

No complaints were received during the reporting period.

9.3 Audits and inspections

NTEPA conducted an inspection of YGP on 28 July 2016, which identified a number of

non-compliances. Eni has since implemented corrective actions for the non-

compliances identified.

The Commonwealth Department of the Environment also conducted an inspection of

YGP in October 2016, with a particular focus on the recently completed wharf

decommissioning project, a positive review was received.

Eni underwent a surveillance audit in October 2016 as part of maintaining its

ISO14001 certification.

9.4 Continuous improvement and other activities

During the reporting period, Eni engaged in the following continuous improvement

activities

Implement the improvement plans set out in the Air Emissions Assessment Report

000036_DV_PR.HSE.1057.000 (see Section 5.6);

Re-submission of the Produced Formation Water Plan

000036_DV_PR.HSE.1056.000 (see Section 6.1.4);

Demolition of the barge landing at Yelcherr Beach in September 2016; and

Fugitive emissions monitoring at the YGP and the WHP (see Section 5.8).

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10. COMMUNITY INITIATIVES

Eni continues to maintain a positive and engaging relationship with the Thamarrurr

Rangers, who deliver local environmental monitoring services including

offshore monitoring of the Single Point Mooring SPM);

turtle monitoring

marine monitoring;

controlled burning;

groundwater sampling, and

weed monitoring and spraying.

The SPM monitoring conducted by the Rangers includes inspection of the SPM

equipment as well as inspection of the surrounding waters for surface sheen and

possible spills. This provides a valuable contribution to the safe offtake of condensate

and is an important part of Eni’s scheduled maintenance.

During turtle nesting season, Eni engage the Rangers to monitor Yelcherr Beach for

turtle tracks and nests on a weekly basis. The Rangers identified a couple of sets of

Olive Ridley and Flatback nests in June and July 2016; in general, observations by the

Rangers suggest significantly less turtles coming ashore to rest this year. During the

demolition of the barge landing, the Rangers continued their weekly monitoring and

confirmed no turtle tracks were present during demolition activities.

The Rangers continued to support the YGP groundwater monitoring, marine

monitoring and weed management programs.

The regular monitoring by the rangers allows our site-based personnel to engage with

local indigenous community members, providing a greater appreciation of the region

and the importance of caring for country. Eni and the Thamarrurr Rangers continue to

work closely to identify opportunities for local engagement and achieve positive

environmental outcomes.

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11. ACRONYMS

ACRONYM Definition

BOD Biochemical oxygen demand

cfu Colony-forming unit

CH4 Methane

CO2 Carbon dioxide

COD Chemical oxygen demand

CPI Corrugated plate interceptor

DO Dissolved oxygen

E. coli Escherichia coli

EC Electrical conductivity

EMP Environmental management plan

Eni Eni Australia B.V.

EPL Environmental Protection Licence

g grams

GC-FID Gas Chromatography Flame Ionisation Detection

GC-MS Gas chromatography mass spectrometry

GHG Greenhouse gas

HCC Heterotrophic colony count

HP High pressure

IBC 1000L intermediate bulk container

k Kilo

KSCM Kilo standard cubic metres

LP Low pressure

µS/cm microSiemens per centimetre

m Metres

m3 Metres cubed

mbgl Metres below ground level

mg Milligrams

mL Millilitres

ML Megalitre

MPN Most probable number

MSCM Million standard cubic metres

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ACRONYM Definition

N2O Nitrogen dioxide

NM Not measured

NOx Nitrogen oxides

NRETAS Department of Natural Resources, Environment, The Arts and Sport (NT) (now

Northern Territory Environment Protection Authority (NT EPA))

NT Northern Territory

NT EPA Northern Territory Environment Protection Authority (formerly Department of

Natural Resources, Environment, The Arts and Sport (NRETAS))

NTP Normal temperature and pressure

OGP Onshore Gas Plant

OIW Oil in water

pH Measure of acidity or basicity

PM Particulate matter, solid particles

ppm Parts per million

PW Produced water

SOx Sulphur oxides

t CO2-e Tonnes of carbon dioxide equivalent

TDS Total dissolved solids

TJ Terra joules

TN Total nitrogen

TP Total phosphorous

TSS Total suspended solids

VOC Volatile organic compounds

WWTP Waste Water Treatment Plant

YGP Yelcherr Gas Plant (formerly named Onshore Gas Plant (OGP))

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12. REFERENCES

[1] AUSTRALIAN AND NEW ZEALAND ENVIRONMENT AND CONSERVATION COUNCIL

(ANZECC), 2000. AUSTRALIAN AND NEW ZEALAND GUIDELINES FOR FRESH AND

MARINE WATER QUALITY. VOLUME 1, THE GUIDELINES / AUSTRALIAN AND NEW

ZEALAND ENVIRONMENT AND CONSERVATION COUNCIL, AGRICULTURE AND

RESOURCE MANAGEMENT COUNCIL OF AUSTRALIA AND NEW ZEALAND. CANBERRA,

ACT.

[2] BARRON J., ASHTON C. & GEARY L. 2006. THE EFFECTS OF TEMPERATURE ON PH

MEASUREMENT. 57TH ANNUAL MEETING OF THE INTERNATIONAL SOCIETY OF

ELECTROCHEMISTRY, EDINBURGH, SEPTEMBER 2006. AVAILBLE ONLINE AT:

<HTTP://REAGECON.COM/PDF/TECHNICALPAPERS/EFFECTS_OF_TEMPERATURE_ON_P

H_V4-_TSP-01-2.PDF>.

[3] COMMONWEALTH OF AUSTRALIA (DEPARTMENT OF THE ENVIRONMENT) (2016).

NATIONAL GREENHOUSE ACCOUNTS FACTORS. AUGUST 2016.

[4] ENI AUSTRALIA BV (2010A). BLACKTIP PROJECT ONSHORE GAS PLANT

ENVIROINMENTAL MANAGEMENT PLAN 000036_DV_EX.HSE.0684.000 REV A03.

NOVEMBER 2010. PERTH, WA.

[5] ENI AUSTRALIA BV (2010B). PRODUCED FORMATION WATER MANAGEMENT.

DOCUMENT NUMBER 000036_DV_EX.HSE.0381.000 REV A03. PERTH, WA.

[6] ENI AUSTRALIA BV (2011). BLACKTIP OPERATIONS MARINE SURVEY 2011.

000036_DV_PR.HSE.0825.000_01. NOVEMBER 2011.

[7] ENI AUSTRALIA BV (2012A). BLACKTIP OPERATIONS MARINE SURVEY 2012.

000036_DV_PR.HSE.0826.000_01. NOVEMBER 2012.

[8] ENI AUSTRALIA BV (2012B). ANNUAL ENVIRONMENTAL PERFORMANCE REPORT 2011–

2012 (000036_DV_PR.HSE.0827.000_01). NOVEMBER 2012.

[9] ENI AUSTRALIA BV (2013A). ANNUAL ENVIRONMENTAL PERFORMANCE REPORT 2012–

2013 (000036_DV_PR.HSE.1023.000_01). OCTOBER 2013.

[10] ENI AUSTRALIA BV (2014). BLACKTIP OPERATIONS MARINE SURVEY 2014

(000036_DV_PR.HSE.1035.000_01). DECEMBER 2014.

[11] ENI AUSTRALIA BV (2015A). ANNUAL ENVIRONMENTAL PERFORMANCE REPORT 2013–

2014 (000036_DV_PR.HSE.1043.000_02). JANUARY 2015.

[12] ENI AUSTRALIA BV (2015B). PRODUCED FORMATION WATER PLAN FOR EPL57-02

CONDITION 43 (000036_DV_PR.HSE.1056.000_01). MAY 2015.

[13] ENI AUSTRALIA BV (2015C). AIR EMISSIONS ASSESSMENT REPORT FOR EPL57-02

CONDITION 47 (000036_DV_PR.HSE.1057.000_01). MAY 2015.

[14] ENI AUSTRALIA BV (2015D). ENVIRONMENTAL PROTECTION LICENCE COMPLIANCE

REPORT 2014–2015 (000036_DV_PR.HSE.1062.000_01). AUGUST 2015.

[15] ENI AUSTRALIA BV (2015E). ENVIRONMENT MANAGEMENT PLAN COMPLIANCE REPORT

2014–2015 (000036_DV_PR.HSE.1063.000_01). AUGUST 2015.

[16] ENI AUSTRALIA BV (2015F). EPBC 2003/1180 COMPLIANCE REPORT 2015

(000036_DV_PR.HSE.1064.000_01). JULY 2015.

[17] ENI AUSTRALIA BV (2015G). OFFSHORE ENVIRONMENT PLAN COMPLIANCE REPORT

2014–2015 (000036_DV_PR.HSE.1065.000_00). NOVEMBER 2015.

[18] ENI AUSTRALIA BV (2015H). NATIONAL GREENHOUSE AND ENERGY REPORTING

SECTION 19 – ENERGY AND EMISSIONS REPORT FOR THE REPORTING YEAR 2014-

2015. 26 OCTOBER 2015.

[19] ENI AUSTRALIA BV (2015I). NPI REPORT FOR 14/15 BLACKTIP ONSHORE GAS PLANT

NT502 FINANCIAL YEAR. 25 SEPTEMBER 2015.

http://reagecon.com/pdf/technicalpapers/Effects_of_Temperature_on_pH_v4-_TSP-01-2.pdf

http://reagecon.com/pdf/technicalpapers/Effects_of_Temperature_on_pH_v4-_TSP-01-2.pdf

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[20] ENI AUSTRALIA BV (2015J). BLACKTIP OPERATIONS MARINE SURVEY 2015

(000036_DV_PR.HSE.1066.000_01). SEPTEMBER 2015.

[21] USEPA 2000. EMISSIONS FACTOR DOCUMENTATION FOR AP-42 SECTION 3.2

NATURAL GAS-FIRED RECIPROCATING ENGINES, AVAILABLE ONLINE AT:

<HTTPS://WWW3.EPA.GOV/TTN/CHIEF/AP42/>.

[22] USEPA 2015. UNITED STATES ENVIRONMENTAL PROTECTION AGENCY. AVAILABLE

ONLINE AT: <HTTP://WWW3.EPA.GOV/>.

[23] WEATHERFORD LABORATORIES (AUSTRALIA) PTY LTD (2009A). PVT ANALYSIS –

FINAL REPORT 1288-06 FOR BLACKTIP-P2. DOCUMENT NUMBER BT-P2_A2.

UNPUBLISHED REPORT PREPARED FOR ENI AUSTRALIA LTD.

[24] WEATHERFORD LABORATORIES (AUSTRALIA) PTY LTD (2009B). COMPOSITIONAL

ANALYSIS – FINAL REPORT 1300-06 BLACKTIP-P1 (3RD BATCH). DOCUMENT NUMBER

BT-P1_A4. UNPUBLISHED REPORT PREPARED FOR ENI AUSTRALIA LTD.

[25] WORLD HEALTH ORGANISATION (2003). HETEROTROPHIC PLATE COUNTS AND

DRINKING-WATER SAFETY: THE SIGNIFICANCE OF HPCS FOR WATER QUALITY AND

HUMAN HEALTH. AVAILABLE ONLINE AT:

<HTTP://WWW.WHO.INT/WATER_SANITATION_HEALTH/DWQ/HPCFULL.PDF>.

PUBLISHED ON BEHALF OF THE WORLD HEALTH ORGANISATION BY IWA

PUBLISHING, ALLIANCE HOUSE, UK.

[26] WORLEY PARSONS (2011). GREENHOUSE GAS EMISSIONS: STUDY OF AUSTRALIAN

CSG TO LNG. PREPARED BY WORLEY PARSONS FOR APPEA.

https://www3.epa.gov/ttn/chief/ap42/

http://www3.epa.gov/

http://www.who.int/water_sanitation_health/dwq/HPCFull.pdf

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APPENDICES

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APPENDIX A:

ANNUAL RETURN

LICENCE NO. EPL57-02

REPORTING PERIOD 10 February 2016 – 9 February 2017

Please email a copy of your completed Annual Return to [email protected].

1. Licence Details ALL Licensees must check their Licence Details are correct. If there are changes to any of these details you must advise the NT EPA by submitting a Change of Contact Details Form.

Licensee Details

Legal Entity Name: Eni Australia B.V.

ACN: 18 092 812 023

Registered Business Address:

226 Adelaide Terrace

PERTH WA 6000

Postal Address: PO Box 6862

EAST PERTH WA 6892

Contact Person: Keith Cook

Position Title: HSE & CSR Manager

Contact Details: b/h: 08 9320 1184

mobile: 0437 254 166

email: [email protected]

Location of Premises

Name: Blacktip Onshore Gas Plant

Address: NT Portion 1637, WADEYE NT

24 hour emergency response

Contact Person(s): Eni IMT Duty Officer

Telephone Numbers: 0419 943 584

ANNUAL RETURN ENVIRONMENT PROTECTION LICENCE

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2. Compliance with Licence Conditions

LICENCE CONDITIONS How/ Evidence When (Date)

ADMINISTRATIVE - -

1. The Licensee must notify the NT EPA within 24 hours if there are changes to the details of the 24-hour emergency contact as provided on page one of this Licence.

No change Reviewed 16 Jan 2017

2. The Licensee must notify the NT EPA within 14 days if there are changes to the Licensee details shown on page one of this Licence.

Contact person has changed. NTEPA advised via Application to Amend Licence.

Reviewed 16 Jan 2017

3. The Licensee must pay an annual fee in accordance with the WMPC Act within 30 Business Days of the anniversary of the commencement date for each year that this Licence is in force.

The annual fee is not payable for this EPL


4. The Licensee must notify the NT EPA prior to making any operational change that will cause, or is likely to cause, an increase in the potential for environmental harm.

No change Reviewed 16 Jan 2017

5. The Licensee must cause clear and legible signage to be displayed in a prominent location at the entrance to the Location including the following details:

Signage is present 13 Nov 2015

5.1. Environment Protection Licence number; and Included in signage Sighted 28 July 2016

5.2. 24 hour emergency contact details as provided on page one of this Licence. Included in signage. Sighted 28 July 2016

6. The Licensee must cause a copy of this Licence to be available at all times:

6.1. on the Licensee's Australian website; and Eni does not have an Australian website.

n/a

6.2. at the Location. A copy of the Licence is available in the YGP Central Control Room

Sighted 28 July 2016

7. Where this Licence requires the provision of any notice, document or other correspondence to the NT EPA, the relevant contact is:

- -

Pollution Control - -

Physical Address: Level 2 Darwin Plaza, 41 Smith Street Mall, Darwin NT 0800 - -

Postal Address: GPO Box 3675, Darwin NT 0801 - -

Email: [email protected] - -

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8. All notices, documents or other correspondence required to be provided pursuant to this Licence must be provided in electronic form unless otherwise specified as a condition of this Licence.

All notices, documents or other correspondence is provided in electronic form.


9. Within 10 Business Days of any amendment being made to a document listed in Table 1 the Licensee must provide the amended document to the NT EPA, along with:

Non-compliant The Blacktip Operations Emergency Response Plan was amended on 10 Feb 2016. During the NTEPA audit on 28 July 2016, it was identified that the amendment had not been communicated to NTEPA. Subsequently on 14 November 2016, Eni submitted to NTEPA the complete documentation, including a tabulated summary of the amendments with document references, reasons for the amendments, and assessment of the environmental risk associated with the amendments.

28 July 2016

9.1. a tabulated summary of the amendment(s) with document references;

9.2. reasons for the amendment(s); and

9.3. an assessment of environmental risk associated with the amendment(s)

Table 1: Licence documents

Document title

Eni Australia Blacktip Project - Produced Water Management Plan (000036_DV_EX.HSE.0381.000_A03 – November 2010)

Eni Australia Blacktip – Flaring Management Plan (000036_DV_EX.HSE.679.000_A01 – April 2009)

Eni Australia Blacktip Operations Oil Spill Contingency Plan (000036_DV_PR.HSE.0388.000_07 – January 2014)

Eni Australia Blacktip Project Onshore Gas Plant Environmental Management Plan (000036_DV_EX.HSE.0684.000_A03 – November 2010)

Blacktip Offshore Environment Plan [as it applies to activities within NT waters] (0036_DV_PR.HSE.0677.000, Rev 06 – February 2014).

Blacktip Operations Emergency Response Plan (000036_DV_PR.HSE.0675.000 Rev 04, July 2012)

10. The NT EPA may require the licensee to revise or amend and resubmit any amended document. - -

OPERATIONAL - -

11. The Licensee must maintain and implement a Communication Plan which includes a strategy for communicating with Blacktip Project Operations Updated

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members of the public who are likely to have a real interest in or be affected by the Activity. Communication Plan 000036_DV_PR.DPM.0759.000_04 was updated 1 December 2015.

1 Dec 2015

12. The Licensee must maintain a log of each complaint made in relation to the Activity. The log must include details of the following:

No complaints have been received to date.


12.1. the date and time of the complaint; - -

12.2. the contact details of the complainant if known, or where no details are provided a note to that effect; - -

12.3. the nature of the complaint; - -

12.4. the nature of events giving rise to the complaint; - -

12.5. prevailing weather conditions at the time of the complaint; - -

12.6. the action taken in relation to the complaint, including any follow-up contact with the complainant; and - -

12.7. if no action was taken, why no action was taken. - -

13. The Licensee must maintain and implement an Emergency Response Plan which documents the procedures to deal with emergencies associated with the Licensed Activity.

Blacktip Operations Emergency Response Plan 000036_DV_PR.HSE.0675.000_05 dated 10 Feb 2016

Sighted 30 Jan 2017

14. The Licensee must ensure that all relevant personnel have received training in the implementation of the Emergency Response Plan.

Inductions, muster drills and emergency exercises are conducted monthly at YGP. Records of emergency exercises are stored in J drive: <J:\EMERGENCY RESPONSE\EMERGENCY RESPONSE DRILLS>

Most recent exercises conducted on 18 Dec 2016, 8 Jan 2017 and 15 Jan 2017.

15. The Licensee must ensure any plant and equipment used for the Licensed Activity: Equipment maintained in accordance with maintenance procedures and engineering documentation, and

Sighted 28 July 2016

15.1. is fit for purpose;

15.2. is maintained; and

15.3. is operated by a person trained to use the plant or equipment.

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SAP work orders. Records are maintained in SAP.

16. The Licensee must segregate waste for recycling, re-use and disposal.

Waste is segregated on site, e.g. scrap steel, wooden pallets for reuse, general waste, hazardous waste.

Inspected 26 Jan 2017

DISCHARGES AND EMISSIONS - -

17. This Licence authorises wastewater to be discharged from the discharge points identified in Table 2, as shown in Figure 1 and Figure 2 in Appendix 1.

- -

Table 2: Authorised Wastewater Discharge Points

Authorised Discharge Point

Description Location UTM coordinates (MGA94)

PW-01 Produced Formation Water discharged via diffuser to ocean

Latitude: -14.241506 Longitude: 129.385128

542277 mE 8425557 mN

WW-01 Treated wastewater effluent to irrigation field


547311 mE 8425514 mN

SW-01 Treated stormwater effluent to ground


547072 mE 8425437 mN

SW-03 Stormwater overflow to ground


547033 mE 8425293 mN

- -

18. Wastewater discharged from the authorised discharge points specified in Table 2 must not: None reported or detected.


18.1. contain any visible matter, petroleum hydrocarbon sheen or scum, litter or other objectionable matter; - -

18.2. cause or generate odours which would adversely affect the use of surrounding waters; - -

18.3. cause algal blooms in receiving waters; - -

18.4. cause visible change in the behaviour of fish or other aquatic organisms in receiving waters; - -

18.5. cause mortality of fish or other aquatic organisms in receiving waters; or - -

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18.6. cause adverse impacts on plants. - -

19.

Wastewater discharged from the authorised discharge points in Table 2 must not exceed the discharge limits specified in Table 3, when measured at the monitoring site codes specified in Table 3. Table 3: Wastewater discharge limits and trigger values

Monitoring site code

SW-02 & SW-03 WW-02 PW-02

Parameter Abbr Unit

Trigger value

Limit Trigger value

Limit Trigger value

Limit

pH pH pH - - 6.5-8.51 - - 6.5-8.5

Biological oxygen demand

BOD mg/L - - 20 - -

Total Suspended Solids

TSS mg/L - - 301 - 10 50

Escherichia coli E.coli cfu/ 100mL

- - 1001 10002 - -

Copper Cu µg/L - - - - - 10

Zinc Zn µg/L - - - - 433 -

Benzene µg/L - - - - 13003 -

Oil in Water4 OIW mg/L 1 6 10 - 6 25

1 Wastewater Treatment Plant Approval, Department of Health and Community Services (DF2008/15, DD2008/02134) 2 Guidelines for Management of Recycled Water Systems, Northern Territory Department of Health 2014 3 80% species protection trigger levels, Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZECC 2000) 4 Analysis method: Hand held meter using florescence with hexane extraction

Non-compliant Eni has an ongoing water monitoring program to, where possible, verify wastewater is within the specified limits prior to discharge. However, some exceedances were identified: - 19 July 2016 – E.Coli in treated wastewater - 6 December 2016 – OIW and TSS in produced water

Dates of exceedances: 19 July 2016 6 Dec 2016

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20.

This Licence authorises air emissions to be discharged from the authorised emission points identified in Table 4, as shown in Figure 1 in Appendix 2.

Table 4: Authorised Atmospheric Emission Points

Authorised Emission Point

Description Location Emission Point Height (m)

A01 High Pressure Flare 01.230.1.A.002


-

A02 Low Pressure Flare 01.230.1.A.003


-

A03 Gas Turbine Compressor A 01.360.1.A.001A


15

A04 Gas Turbine Compressor B 01.360.1.A.001B


15

A05 Gas Turbine Compressor C 01.360.1.A.001C


15

A06 Gas Engine Generator No. 1 01.470.1.A.001A


8

A07 Gas Engine Generator No. 2 01.470.1.A.001B


8

A08 Gas Engine Generator No. 3 01.470.1.A.001C


8

A09 Emergency Diesel Generator Package 01.480.1.A.001


-

- -

21.

Air emissions at the authorised emission points identified in Table 4 must not exceed the concentration limits specified in Table 5. Table 5: Air emission concentration limits and trigger values

Atmospheric Emission Points Concentration limits Trigger values

Emission point code Description

SO2* NOx* CO* Solid Particles VOC Smoke NOx* Smoke

mg/m3 mg/m3 mg/m3 mg/m3 mg/m3 mg/m3

Non-compliant Carbon monoxide (CO) emission concentrations measured from the generators in August 2016 ranged from 980 to 1,500 mg/m3 and exceeded the limit of 100 mg/m3 specified in

Dates of exceedance: 18 August 2016

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A01 High Pressure Flare

‐ ‐ ‐ ‐ 402

No visible emission other than for a total period of no more than 5 minutes in any 2 hours

‐ Ringelmann 1 or 20% opacity

A02 Low Pressure Flare

A03 Gas Turbine Compressor A

100 3502 1001 502 402 ‐ ‐ ‐ A04 Gas Turbine Compressor B

A05 Gas Turbine Compressor C

A06 Gas Engine Generator No. 1

1002 5000 1001 502 402 ‐ 3502 ‐ A07 Gas Engine Generator No. 2

A08 Gas Engine Generator No. 3

A09 Emergency Diesel Generator ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐

*Dry, 273K, 101.3 kPa, 15% O2 or at manufacturer's specified level 1 Integrated Pollution Prevention and Control Reference Document on Best Available Techniques for Large Combustion Plants, European Commission 2006 2 Protection of the Environment Operations (Clean Air) Regulation 2010, New South Wales

Table 5 under EPL57-02 condition 21. The CO emissions are in line with the manufacturer specifications. Revision of the CO limit is under discussion with NTEPA. All other emissions were within the concentration limits.

22. Air emissions from the authorised emission points identified in Table 4 must not exceed the annual pollutant mass limits specified in Table B in Appendix 2.

Non-compliant The annual carbon monoxide (CO) emissions were reported above the EPL limits (specified in Table B under Appendix 2 of the EPL) for the power

Identified 7 Feb 2017

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generators and emergency diesel generator. Revision of the CO limits are under discussion with NTEPA. All other emissions were within the mass limits.

23. The Licensee must ensure that stormwater does not come into contact with a contaminant or waste, which causes or is likely to cause environmental harm.

Clean stormwater, that is allowed to run off site, is kept segregated from contaminated stormwater or other polluting substances.


MONITORING - -

24. The Licensee must for all terrestrial monitoring points: - -

24.1. install, maintain and provide appropriate identification signage so that they are easily identifiable at all times;

and

Non-compliant Signage has been installed at terrestrial monitoring points. However, power generators are labelled A, B and C whereas in the EPL57-02 they are distinguished by numbers no 1, 2, 3. Revision of the EPL is under discussion with NTEPA, including the generator labels.

Inspected 28 July 2016

24.2. maintain safe access and egress, as is reasonably practicable. Access and egress is maintained.


25. For each sample required to be collected by this Licence the following information must be recorded and retained: For each sample, a Chain of Custody form

Sighted

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25.1. the date on which the sample was taken; is available with the required information. Samples are also recorded in the lab sampling register.

26 Jan 2017

25.2. the time at which the sample was collected;

25.3. the point at which the sample was taken;

25.4. the name of the person who collected the sample;

25.5. the chain of custody forms relating to the sample;

Chain of custody forms are available for each sample sent for external laboratory analysis.

Sighted 26 Jan 2017

25.6. the field measurements and/or analytical results for the sample; and

External laboratory results are maintained on file. Field measurements are recorded in the lab sampling register.

Sighted 26 Jan 2017

25.7. laboratory QA/QC documentation.

Laboratory QA/QC documentation is maintained by the laboratory.

Reviewed 28 July 2016

26. Discharge monitoring must be conducted in accordance with Table A in Appendix 1.

Non-compliant Discharge monitoring has been undertaken. However, the monitoring undertaken was not fully compliant. The quarterly produced water sample collected on 7 Sept 2016 was not representative of discharge. On site monitoring of produced water did not include EC, DO,


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Temperature or Turbidity until Sept 2016, when the equipment was available on site and operators received training. DO analysis is still pending further training on the procedure. On site monitoring of stormwater discharge from the open drains sump (ODS) and utilities discharge has been conducted on a regular basis, however gaps have been identified where data is not available: 24 July 2016 (utilities) 14 Aug 2016 (utilities) 4 Dec 2016 (utilities) 11 Dec 2016 (utilities) 25 Dec 2016 (utilities) 1 Jan 2017 (utilities) 10 Jan 2017 (utilities) 15 Jan 2017 (utilities) 22 Dec 2016 (ODS) 26 Dec 2016 (ODS) 27 Dec 2016 (ODS) 28 Dec 2016 (ODS) 1 Jan 2017 (ODS) 2 Jan 2017 (ODS)

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3 Jan 2017 (ODS) 23 Jan 2017 (ODS) 24 Jan 2017 (ODS) 25 Jan 2017 (ODS) 3 Feb 2017 (ODS) 5 Feb 2017 (ODS) 6 Feb 2017 (ODS) Refer to Section 6 and Appendices E and G of the Blacktip Annual Environmental Performance Report 2016 (000036_DV_PR.HSE.1120.000).

27. Air emission monitoring must be conducted in accordance with Table A in Appendix 2.

Air emission monitoring has been conducted in accordance with the EPL.

Conducted: 10 Dec 2015, 17 Aug 2016, 15 Feb 2017

28. Groundwater monitoring must be conducted in accordance with Table A in Appendix 3.

Groundwater monitoring was conducted in accordance with the EPL

Conducted: 8 March 2016, 24 May 2016, 7 Sep 2016, 7 Dec 2016

29. The Licensee must measure and record fuel/gas flow from the flow meters listed in Table 6.

Flowmeters operational


Table 6: Flow Meters

Gas Flow Meter Description Location

230.1 FIT.008 High pressure flare meter Latitude: -14.243973 Longitude: 129.435191

230.1 FIT.002 Low pressure flare meter

420.1 FIT 007 Fuel gas to flare purge distribution

420.1 FIT 161 Gas Turbine Compressor A 01.360.1.A.001A


420.1 FIT 261 Gas Turbine Compressor B Latitude: -14.242328

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01.360.1.A.001B Longitude: 129.435709

420.1 FIT 361 Gas Turbine Compressor C 01.360.1.A.001C


420.1 FIT 004 Low pressure fuel gas to generators


30. The Licensee must ensure that all water samples: - -

30.1. are collected in accordance with AS/NZS 5567; and

All water sampling is carried out in accordance with Water Sampling Procedure 000036_DV_PR.HSE.1013.000_01 dated 9 October 2014

Checked 26 Jan 2017

30.2. are submitted to a laboratory with current NATA accreditation or equivalent, for the parameters to be

measured.

The external laboratory services provider is Intertek, which is NATA accredited. Refer to <http://www.nata.com.au/nata/scopeinfo/?key=14671>


RECORDING AND REPORTING - -

31. All records required to be kept by this Licence must be in a legible format. All sighted records are legible.

-

32. The Licensee must maintain records of the nature, quantities and disposal method of all waste streams generated at the premises, including Listed Waste.

Waste volume and type removed from site is recorded in a monthly report.


33. The Licensee must keep records of all non-compliances with this Licence. All non-compliances are recorded in a non-compliances register.


34. The Licensee must as soon as practicable, and in any case within 24 hours, notify the NT EPA of non-compliances with this Licence.

Non-compliant Non-compliance with Condition 22 was identified during the preparation of this


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report, and not reported within 24 hours.

35. Non-compliance notifications required under condition 34 must identify:

Non-conformance notifications include the information specified.


35.1. the date and time of the non-compliance;

35.2. when the non-compliance was detected and by whom;

35.3. the actual and potential causes and contributing factors to the non-compliance;

35.4. the risk of environmental harm arising from the non-compliance;

35.5. action(s) that have or will be undertaken to mitigate any environmental harm arising from the non-compliance;

and

35.6. corrective actions that have or will be undertaken to ensure the non-compliance does not reoccur.

36. The Licensee must immediately, and in any case within 24 hours, notify the NT EPA of any potential or actual environmental harm or pollution, by contacting the Pollution Hotline on telephone number 1800 064 567 and emailing [email protected].

Incidents causing potential or actual environmental harm or pollution have been reported – see Section 3 Summaries.


37. The Licensee must notify the NT EPA of material or serious environmental harm in accordance with section 14 of the WMPC Act.

There have been no events resulting in material or serious environmental harm.

-

38. The Licensee must complete the attached Annual Return, Appendix 4, which report relates to the preceding 12 month period, and provide to the NT EPA within 10 Business Days after the anniversary of the commencement date of this Licence.

This report will be provided to NT EPA in accordance with the EPL

February 2017

39. The NT EPA may require the Licensee to revise or amend and resubmit the Annual Return. - -

40. The Licensee must provide an Annual Performance Report, which report relates to the preceding 12 month period, to the NT EPA within 10 Business Days after the anniversary of the commencement date of this Licence.

This report will be provided to NT EPA in accordance with the EPL

February 2017

41. The Annual Performance Report required under condition 40 must:

Refer to the following sections of the Blacktip Annual Environmental Performance Report 2016

-

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41.1. include description of gas plant infrastructure and processes; Section 3

February 2017

41.2. report on total condensate produced and total gas processed by the gas plant; Section 4

41.3. report on the quality of gas received by the plant; Section 4

41.4. include a tabulation of all monitoring data required as a condition of this Licence, including discharge,

groundwater and air emissions monitoring; Section 5-6, 8

41.5. include a trend analysis and interpretation of all monitoring data required as a condition of this Licence; Section 5-6, 8

41.6. include long term trend analysis of monitoring data to demonstrate any environmental impact associated with

the Activity over a minimum period of three years; Section 5-6, 8

41.7. identify the number of exceedances of discharge/concentration trigger values that have occurred during the

reporting period; Section 9

41.8. report on the following associated with discharges:

total annual discharges (ML/year);

frequency and volume of Produced Formation Water discharges;

Section 6, 7

41.9. report the total annual emissions of the following parameters, for each emission point, as well as for condensate tanks and fugitive emissions:

NOx;

SO2;

VOC;

PM10;

Refer to Eni NGER and NPI submissions for 2015-2016.

41.10. report in accordance with the requirements for a Monitoring Report identified in: Guidelines for Consultants Reporting on Environmental Issues (as amended from time to time), available from http://www.ntepa.nt.gov.au/__data/assets/pdf_file/0005/136481/guidelines_consultants_reporting_environmental_issues.pdf:

Section 2.2

42. The NT EPA may require the Licensee to revise or amend and resubmit the Annual Performance Report. - -

PERFORMANCE IMPROVEMENT - -

43. The Licensee must provide a Produced Formation Water Plan to the NT EPA by 1 May 2015. Non-compliant The Produced Formation Water Plan For EPL57-02 Condition 43 000036_DV_PR.HSE.1056.000_03 was submitted on 14 July

14 July 2016

44. The Produced Formation Water Plan required under condition 43 must:

44.1. propose a mixing zone in accordance with the NT EPA Guidelines on Mixing Zones, Version 1.2, available

from: http://www.ntepa.nt.gov.au/__data/assets/pdf_file/0017/160631/guidelines_mixing_zones.pdf;

44.2. assess whether the risks posed by management of Produced Formation Water are as low as reasonably

practicable (ALARP);

44.3. include a proposed dilution factor (including methodology used to derive the dilution factor) based on results from produced water chemical characterisation, ecotoxicity and biodegradation studies undertaken in

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accordance with EPL 57-01; 2016 as agreed with NT EPA. NTEPA provided feedback on 22 December 2016 and found it did not comply with all requirements under Condition 44. The following conditions have not been satisfied: 44.1, 44.2, 44.5, 44.6, 44.7, 44.8, 44.9, 44.10.

44.4. include summary and interpretation of the results for all historical studies, including:

chemical composition of Produced Formation Water;

biodegradation and bioaccumulation potential of Produced Formation Water contaminants;

toxicity testing of Produced Formation Water; and

marine surveys;

44.5. identify surface water monitoring points where the 99% level of species protection trigger values specified in

Table 3.4.1 of the Australian and New Zealand Guidelines for Fresh and Marine Water Quality (ANZECC 2000) will be applied;

44.6. identify a schedule for monitoring of the surface water monitoring points identified as part of condition 44.5;

44.7. identify a methodology for validating the near and far field Produced Formation Water dispersion modelling

predictions that have been included in the document Eni Blacktip Project Produced Water Management Plan (document number 00036_DV_EX.HSE.0381.000_A03);

44.8. identify a schedule for implementation and completion of validation activities.

44.9. identify actions that will be completed to ensure that wastewater discharged from authorised discharge point

PW-01 achieves the trigger value specified in Table 3, when measured at monitoring site code PW-02; and

44.10. identify a schedule for completion of actions identified as part of condition 44.9.

45. The NT EPA may require the Licensee to revise or amend and resubmit the Produced Formation Water Plan. NTEPA requested resubmission of the Plan.

Received 22 Dec 2016

46. The Licensee must comply with the schedules prepared in accordance with conditions 44.6, 44.8 and 44.10. The activities are tracked in Sharepoint.

Checked 16 Jan 2017

47. The Licensee must provide an Air Emissions Assessment Report to the NT EPA by 1 May 2015.

Air Emissions Assessment Report For EPL57-02 Condition 47 000036_DV_PR.HSE.1057.000_01 dated 29 May 2015 Submitted 29 May 2015 as per extension agreed with NT EPA

29 May 2015

48. The Air Emissions Assessment Report required under condition 47 must:

48.1. identify whether emissions stack maintenance, discharge ducting and sampling ports for authorised

emissions points A03, A04, A05, A06, A07 and A08 comply with the Australian Standard for Stationary Source Emissions (AS4323.1), as amended from time to time;

48.2. identify whether stack sampling complies with the Environment Protection Authority, Victoria document A

Guide to the Sampling and Analysis of Air Emissions and Air Quality, as amended from time to time;

48.3. identify a schedule for achieving compliance with the two abovementioned documents;

48.4. identify the cause and contributing factors to ongoing NOx exceedance(s) of the trigger value specified in

Table 5 of this Licence;

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48.5. identify the risk to the environment associated with continued NOx exceedances;

48.6. assess whether the risks posed by management of NOx emissions are ALARP;

48.7. identify actions that will be completed to reduce NOx air emissions from authorised emissions points A06,

A07 and A08 to achieve the trigger value specified in Table 5 of this Licence; and

48.8. identify a schedule for completion of actions identified as part of condition 48.7.

49. The NT EPA may require the Licensee to revise or amend and resubmit the Air Emissions Assessment Report. The report has been accepted by NTEPA.

-

50. The Licensee must comply with the schedules prepared in accordance with conditions 48.3 and 48.8. The activities are tracked in Sharepoint.

Checked 16 Jan 2017

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3. Summaries Complaints Recording

Number of complaints recorded by the licensee during the reporting period (as required by condition 12 of the licence)

None

Summary of complaints n/a Summary of outcomes n/a

Notifications of potential or actual environmental harm or pollution Number of events recorded by the licensee during the reporting period (as required by condition 35 of the licence)

2

Summary of events Summary of outcomes 6 December 2016 – PFW discharge exceeded TSS and OIW limits.

On site laboratory equipment have been re-verified and calibrated.

2 January 2017 – PFW overflow to grade System has been reconfigured and the valve, which is not normally used, has been isolated.

Signature and Certification

This declaration must only be signed by a person(s) with the legal authority to sign it. The ways in which the application may be signed, and the people who may sign the application, are set out in the categories below.

If the licence holder is: Tick The application must be signed and certified by one of the following:

An individual The individual.

A partnership A partner.

A company

The common seal being affixed in accordance with the Corporations Act, or

Two directors, or

A director and a company secretary, or

If a proprietary company that has a sole director who is also the sole company secretary – by that director.

A public authority

The Chief Executive Officer (CEO) of the public authority, or

By a person delegated to sign on the public authority’s behalf in accordance with its legislation (Please note: a copy of the relevant instrument of delegation must be attached to this application).

I/We hereby declare that the information provided in this Annual Audit and Compliance Report and accompanying documents is to the best of my/our knowledge, true and correct.

Signature Signature

Name (printed) Name (printed)

Position Position

Date Date

Seal (if signing under seal):

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APPENDIX B:

POLLUTANT MASS INVENTORY

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Appendix B: Air emissions annual pollutant mass inventory and comparison against EPL limits

Atmospheric Emission Points Annual Pollutant Mass (t)

Point ID Description SO2 NOx CO CO2 CH4 N2O CO2-e

A01 High Pressure Flare limits 0.1 6 9 4,239 7 0.1 4,443

Annual pollutant load 2013-2014 <0.1 2 11 3,281 6 <0.1 3,438

2014-2015 <0.1 2 14 3,350 6 <0.1 3,512

2015-2016 0.02 1.4 8 2,520 4 <0.1 2,641

A02 Low Pressure Flare limits 0.1 8 13 5,909 10 0.1 6,193

Annual pollutant load 2013-2014 <0.1 3 15 4,531 8 <0.1 4,749

2014-2015 <0.1 2 11 4,626 8 <0.1 4,849

2015-2016 0.03 1.9 11 3,382 5 0.1 3,545

- Flare Fuel Gas limits - - - - - - -

Annual pollutant load 2013-2014 -3 -3 -3 305 1 <0.1 320

2014-2015 -3 -3 -3 305 1 <0.1 320

2015-2016 0.002 0.2 1 295 0.4 0.01 310

A03 Gas Turbine Compressor A limits

0.3 266 44 77,494 7 0.1 77,690 A04 Gas Turbine Compressor B limits

A05 Gas Turbine Compressor C limits

Annual pollutant load 2013-2014 0.2 117 29 25,620 2 <0.1 25,685

2014-2015 0.2 93 30 25,875 2 <0.1 25,941

2015-2016 0.2 100 28 24,885 2 0.05 24,948

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Atmospheric Emission Points Annual Pollutant Mass (t)

Point ID Description SO2 NOx CO CO2 CH4 N2O CO2-e

A06 Gas Engine Generator No. 1 limits

0.1 234 7 4,061 0.4 0.1 4,072 A07 Gas Engine Generator No. 2 limits

A08 Gas Engine Generator No. 3 limits

Annual pollutant load 2013-2014 <0.1 117 12 2,911 <0.1 <0.01 2,918

2014-2015 <0.1 168 12 3,027 <0.1 <0.01 3,035

2015-2016 0.02 155 16 3,111 0.24 0.006 3,119

A09 Emergency Diesel Generator limits 0.1 1 0.1 100 0.1 0.1 100

Annual pollutant load 2013-2014 <0.1 <1 0.4 -6 -6 -6 -6

2014-2015 <0.1 <1 0.4 88 0.13 0.25 88

2015-2016 <0.001 0.7 0.18 34 0.002 <0.001 34

- Condensate Tank vents limits - - - - 39 - 809

Annual pollutant load 2013-2014 -3 -3 -3 0 <1 0 11

2014-2015 -3 -3 -3 0 <1 0 11

2015-2016 -3 -3 -3 0 <1 0 10

- Fugitive limits - - - - 58 - 1213

Annual pollutant load 2013-2014 <0.1 0.9 0.4 0 29 0 617

2014-2015 <0.1 0.7 0.3 0 29 0 611

2015-2016 -3 -3 -3 0 23 0 563

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1 Sox, NOx and CO figures are as per the NPI reports, and CH4, N2O and CO2 are as per NGER reports.

2 Pollutants above the EPL mass limit are indicated in red text.

3 Not available or below threshold (i.e. for NPI substances, SO2, NOx, CO).

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APPENDIX C:

EMISSIONS SAMPLING RESULTS

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Appendix C.1: Summary of stack emission monitoring results from the compressors

CO CO2 CH4 NOx1 Sox Solid particles VOCs

EPL57-02 limit 100 mg/m3 - - 350 mg/m3 100 mg/m3 50 mg/m3 40 mg/m3

27 March 2014

Compressor A NM NM NM 280 32 NM <0.035

Compressor B NM NM NM 310 21 NM <0.048

Compressor C NM NM NM NM NM NM NM

18 June 2014

Compressor A NM NM NM 260 24 NM <0.045

Compressor B NM NM NM 260 48 NM <0.047


17 December 2014

Compressor A NM NM NM 250 15 NM 0.83

Compressor B NM NM NM 160 <6.1 NM 1.3

Compressor C NM NM NM 240 14 NM 5.6

24 June 2015

Compressor A NM NM NM NM NM NM NM

Compressor B <3.2 2.6% <0.19 310 NM NM <0.19


9 December 2015

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CO CO2 CH4 NOx1 Sox Solid particles VOCs

EPL57-02 limit 100 mg/m3 - - 350 mg/m3 100 mg/m3 50 mg/m3 40 mg/m3


Compressor B <3.1 2.6% NM 180 <2.8 NM <0.19

Compressor C <3.1 2.6% NM 200 <2.8 NM <0.234

18 August 2016


Compressor B 3.6 2.3 <1.9 190 <6.5 <1.9 2.3

Compressor C 3.3 2.3 <2.0 210 <6.0 <2.0 1.4

15 February 2017

Compressor A tba tba tba tba tba tba tba

Compressor B tba tba tba tba tba tba tba

Compressor C tba tba tba tba tba tba tba

Notes: 1 NOx presented as NO2 equivalent. 2 Sox presented as the cumulative concentration of SO2 and SO3. 3 All measurements reported on a dry basis at NTP and corrected to 15% O2 in accordance with the EPL. 4 Measurements above the EPL limit are indicated in red. 5 NM = Not measured.

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Appendix C.2: Summary of stack emission monitoring results from the generators

CO CO2 CH4 NOx1 Sox PM VOCs

EPL57-02 limit 100 mg/m3 5000 mg/m3 100 mg/m3 50 mg/m3 40 mg/m3

EPL57-02 trigger value 350 mg/m3

27 March 2014

Generator A NM NM NM NM NM NM NM

Generator B NM NM NM 1810 NM NM NM

Generator C NM NM NM 1450 NM NM NM

18 June 2014

Generator A NM NM NM 2120 NM NM NM



17 December 2014

Generator A NM NM NM 1220 NM NM NM



24 June 2015

Generator A 944 7.8% NM 1730 NM NM 0.2

Generator B 1023 7.9% NM 1610 NM NM 1.7

Generator C 787 6.7% NM 1500 NM NM 0.7

9 December 2015

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CO CO2 CH4 NOx1 Sox PM VOCs

EPL57-02 limit 100 mg/m3 5000 mg/m3 100 mg/m3 50 mg/m3 40 mg/m3

EPL57-02 trigger value 350 mg/m3

Generator A 900 11.6% NM 1500 <2.8 NM 0.7

Generator B 800 6.6% NM 1700 <2.8 NM 0.7

Generator C 710 11.5% NM 1600 <2.8 NM 0.5

18 August 2016

Generator A 1300 11.5 0.0041 1700 45 <2.8 3.9

Generator B 1500 11.3 0.0041 1500 50 <2.8 2.8

Generator C 980 11.5 <0.002 1700 56 <2.8 2.9

15 February 2017

Generator A tba tba tba tba tba tba tba

Generator B tba tba tba tba tba tba tba

Generator C tba tba tba tba tba tba tba

Notes: 1 NOx presented as NO2 equivalent. 2 Sox presented as the cumulative concentration of SO2 and SO3. 3 All measurements reported on a dry basis at NTP and corrected to 15% O2 in accordance with the EPL. 4 Measurements above the EPL limit are indicated in red.

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APPENDIX D:

PRODUCED WATER MONITORING RESULTS

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Routine produced water discharge sampling and analysis under Table A of EPL57-02

Date Volume pH EC DO Temp Turbidity OIW

m3 pH µs/cm mg/L °C NTU mg/L

17 January 2016 71 19 -2 -2 -2 -2 19

24 January 2016 139 6.83 -2 -2 -2 -2 7.7

1 February 2016 562 6.63 -2 -2 -2 -2 18.5

13 February 2016 481 6.59 -2 -2 -2 -2 3.9

24 February 2016 361 8.01 -2 -2 -2 -2 3.6

2 March 2016 300 6.89 -2 -2 -2 -2 9.2

12 March 2016 62 6.52 -2 -2 -2 -2 22

28 March 2016 464 7.1 -2 -2 -2 -2 9.6

10 April 2016 75 6.6 -2 -2 -2 -2 10.2

4 May 2016 233 6.75 -2 -2 -2 -2 19

5 May 2016 394 8.09 -2 -2 -2 -2 24.6

24 May 2016 274 6.95 -2 -2 -2 -2 10.4

25 May 2016 257 6.98 -2 -2 -2 -2 11.7

8 June 2016 212 6.58 -2 -2 -2 -2 9.7

22 July 2016 405 7.37 -2 -2 -2 -2 12.8

6 September 2016 473 6.78 646.2 -3 24 67.1 20.6

23 September 2016 446 8.4 594.2 -3 23.6 4.8 13.6

13 October 2016 395 7.7 1.25 -3 20.6 800 8.8

15 October 2016 171 6.7 1.05 -3 25.8 596 2.8

25 November 2016 88 6.6 - -3 - - 7.8

28 November 2016 189 6.5 1.06 -3 28.2 75 7.6

6 December 2016 155 6.5 819 -3 28 34 1.6

Notes: 1 This table summarises the discharges between 1 January 2016 – 31 December 2016. 2 Some site laboratory equipment not yet available and required training still in progress. Note: these

parameters are included in the quarterly monitoring. 3 Reagent not available on site. Note: these parameters are included in the quarterly monitoring.

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Quarterly produced water sampling and analysis under Table A of EPL57-02

Unit EPL

limit

Trigger

value

25 May

2016

7 Sep

20161

12 Dec

2016

6 Feb

20172

ENVIRONMENTAL PARAMETERS

pH - 6.8-8.5 - 7.12 - 7.59 tba

EC µs/cm - - 416 - 805 tba

Turbidity NTU - - 28 - 9.5 tba

DO mg/L - - 11.2 - 8.4 tba

OIW mg/L 25 6 106.93 - 57.44 tba

TSS mg/L 50 10 48 - 844 tba

TDS mg/L 201 - 259 tba

BOD mg/L - - NM - 18.1 tba

TOC mg/L - - 130 - 940 tba

COD mg/L - - 550 - 3000 tba

NUTRIENTS

Nox-N µg/L - - <5 - 7 tba

NO3-N µg/L - - <5 - 6 tba

NO2-N µg/L - - <5 - <5 tba

Ammoniacal N µg/L - - 650 - 10 tba

TP µg/L - - 630 - 800 tba

TN µg/L - - 1200 - 200 tba

HYDROCARBONS

TRH C6-C9 µg/L - - 4400 - 5500 tba

TRH C6-C10 µg/L - - 5500 - 6300 tba

TRH C6-C10 less BTEX µg/L - - 3000 - 3800 tba

TPH >C16-C35 Ali µg/L - - <100 - <100 tba

TPH >C35 Ali µg/L - - <100 - <100 tba

TPH C16-C35 Aro µg/L - - <50 - <50 tba

Benzene µg/L - 1300 420 - 460 tba

Toluene µg/L - - 1000 - 1000 tba

Ethylbenzene µg/L - - 140 - 140 tba

m+p-xylene µg/L - - 670 - 690 tba

o-xylene µg/L - - 230 - 230 tba

napththalene µg/L - - 43 - 68 tba

TRH C10-C14 µg/L - - 3100 - 27000 tba

TRH C15-C28 µg/L - - 1200 - 620 tba

TRH C29-C36 µg/L - - <100 - <100 tba

TRH >C10-C16 µg/L - - 3100 - 12000 tba

TRH >C10-C16 less Napth µg/L - - 3100 - 12000 tba

TRH >C16-C34 µg/L - - 580 - 360 tba

TRH >C34-C40 µg/L - - <100 - <100 tba

Ali/Ar µg/L - - NM - NM tba

Naphthalene µg/L - - 47 - 14 tba

Acenaphthylene µg/L - - <1 - <1 tba

Acenaphthene µg/L - - <1 - <1 tba

Fluorene µg/L - - 3 - 3 tba

Phenanthrene µg/L - - 3 - 2 tba

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Unit EPL

limit

Trigger

value

25 May

2016

7 Sep

20161

12 Dec

2016

6 Feb

20172

Anthracene µg/L - - <1 - <1 tba

Fluoranthene µg/L - - <1 - <1 tba

Pyrene µg/L - - <1 - <1 tba

Benzo(a)anthracene µg/L - - <1 - <1 tba

Chrysene µg/L - - <1 - <1 tba

Benzo(b,j+k)fluoranthene µg/L - - <2 - <2 tba

Benzo(a)pyrene) µg/L - - <1 - <1 tba

Indeno(1,2,3-c,d)pyrene µg/L - - <1 - <1 tba

Dibenzo(a,h)anthracene µg/L - - <1 - <1 tba

Benzo(g,h,i)perylene µg/L - - <1 - <1 tba

Benzo(a)pyrene TEQ µg/L - - <5 - <5 tba

Total +ve PAHs µg/L - - 53 - 19 tba

PHENOLS

Phenol mg/L - - 0.089 - 0.25 tba

2-Chlorophenol mg/L - - <0.001 - <0.01 tba

4-Chloro-3-Methylophenol mg/L - - <0.005 - <0.05 tba

2-Methylphenol (O-Cresol) mg/L - - 0.14 - 0.54 tba

3/4-Methylphenol(m/p-

Cresol)

mg/L - -

0.14

-

0.43

tba

2-Nitrophenol mg/L - - <0.001 - <0.01 tba

2,4-Dimethylphenol mg/L - - 0.15 - 0.33 tba

2,4-Dichlorophenol mg/L - - <0.001 - <0.01 tba

2,6-Dichlorophenol mg/L - - <0.001 - <0.01 tba

2,4,5-Trichlorophenol mg/L - - <0.001 - <0.01 tba

2,4,6-Trichlorophenol mg/L - - <0.001 - <0.01 tba

2,4-Dinitrophenol mg/L - - <0.02 - <0.01 tba

4-Nitrophenol mg/L - - <0.02 - <0.2 tba

2,3,4,6-Tetrachlorophenol mg/L - - <0.001 - <0.2 tba

2-methyl-4,6-Dinitrophenol mg/L - - <0.01 - <0.01 tba

Pentachlorophenol mg/L - - <0.005 - 0.1 tba

MBA mg/L - - <0.1 - <0.05 tba

METALS

Al µg/L - - 490 - 20 tba

Ar µg/L - - <1 - <1 tba

Ba µg/L - - 260 - 580 tba

Be µg/L - - <0.5 - <0.5 tba

B µg/L - - 86 - 100 tba

Cd µg/L - - 0.4 - 0.4 tba

Co µg/L - - <1 - 1 tba

Cu µg/L 10 - <1 - <1 tba

Cr µg/L - - <1 - 9 tba

Fe µg/L - - 2500 - 4000 tba

Hg µg/L - - 0.6 - 0.6 tba

Mg µg/L - - <5005 9006 34007 tba

Mn µg/L - - 67 - 150 tba

Mo µg/L - - 1 - 3 tba

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Unit EPL

limit

Trigger

value

25 May

2016

7 Sep

20161

12 Dec

2016

6 Feb

20172

Pb µg/L - - <1 - <1 tba

Ni µg/L - - <1 - 81 tba

Se µg/L - - <1 - <1 tba

Sn µg/L - - <1 - <1 tba

Sr µg/L - - 110 - 540 tba

Zn µg/L - 43 2006 - 42 tba

RADIUM

Ra-226 mBq/L - - - - - -

Ra-228 mBq/L - - - - - -

1 A discharge sample was collected on 7 September 2016, however it was sent to the wrong laboratory and therefore

not tested for the quarterly parameters. 2 Results of samples collected on 6 February 2017 are yet to be received. 3 This exceedance was reported to NTEPA See Section 9.1. The analysis was undertaken using a TD3100 benchtop

fluorometer. Prior to discharge, site monitoring using a Horiba water analyser measured OIW at 13.5 mg/L. A

combination of Gas Chromatography Mass Spectrometry (GC-MS) and Gas Chromatography Flame Ionisation

Detection (GC-FID) measured TRH and TPH at ~9 mg/L and below limits of detection, respectively, in the same

sample.

4 Exceedances reported to NTEPA. See Section 9.1.

5 Sampled 11 May 2016 6 Sampled 13 July 2016. 7 Sampled 9 November 2016.

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APPENDIX E:

WWTP SAMPLING RESULTS

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Treated wastewater effluent monitoring results

Date

sampled

Unit EPL

limit

Trigger

value

8 Jan

2016

10 Feb

2016

9 Mar

2016

13 Apr

2016

11 May

2016

8 June

2016

13 July

2016

10Aug

2016

14 Sep

2016

7 Oct

2016

16 Nov

2016

4 Dec

2016

4 Jan

2017

BACTERIOLOGICAL

E Coli /100mL

MPN

1000 100 <10 <10 NM 441 <10 <10 <10 323 <10 203 20 161 tba

Enterococci /100mL

MPN

- - NM NM NM <10 NM NM NM NM 213 NM 50 373 tba

ENVIRONMENTAL

PARAMETERS

pH - - 6.8-8.5 5.02 5.2 NM 6.02 4.59 5.83 5.85 7.18 7.11 7.15 7.26 6.81 tba

EC µs/cm - - 712 836 NM 1560 955 1139 912 1056 808 884 915 773 tba

Turbidity NTU - - NM NM NM 33 NM NM 11 3.2 28 8.5 4.5 4.9 tba

DO mg/L - - NM NM NM 2.7 9.5 7.7 8.2 7.4 4.2 6.1 6.5 6.5 tba

OIW mg/L - - 21.99 18.83 NM 20.48 24.38 84.61 19.42 19.5 29.78 20.12 25.3 43.31 tba

TSS mg/L - 30 25.5 29 14 92 73 26 28 5 56.5 32 35 29 tba

TDS mg/L - - 369 415 81.3 440 515 568 465 531 404 432 401 384 tba

BOD mg/L - 20 18.6 15.8 8.3 23 12 4.9 17 3.8 21.3 19.4 20.1 21.4 tba

TOC mg/L - - NM NM NM 10 15 14 8 10 10 27 7 11 tba

COD mg/L - - NM NM NM <50 70 65 55 50 200 550 <50 65 tba

NUTRIENTS

Nox-N mg/L - - NM NM NM 29 39 28.8 32.3 1.8 5.8 0.3 3.1 0.01 tba

NO3-N mg/L - - NM NM NM 28.8 38.9 28.7 32.2 1.7 5.7 0.15 3.1 <0.005 tba

NO2-N mg/L - - NM NM NM 0.15 <0.05 0.8 0.025 0.11 0.046 0.13 0.014 0.006 tba

Ammoniacal N mg/L - - NM NM NM 5.75 3.27 22.2 13.1 29 14 11 1.87 8.3 tba

TP mg/L - - 2.46 1.91 NM 3.01 2.52 NM 2.4 2.14 2.76 2.34 11.5 2.12 tba

TN mg/L - - 28 32.6 NM 37.6 45.8 NM 46.1 34.8 30.1 25.3 9.4 9.61 tba

HYDROCARBONS

vTRH(C6-

10)/BTEX

mg/L - - NM NM NM NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

tba

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Date

sampled

Unit EPL

limit

Trigger

value

8 Jan

2016

10 Feb

2016

9 Mar

2016

13 Apr

2016

11 May

2016

8 June

2016

13 July

2016

10Aug

2016

14 Sep

2016

7 Oct

2016

16 Nov

2016

4 Dec

2016

4 Jan

2017

METALS

Al mg/L - - NM NM NM 14100 NM NM NM NM NM NM NM NM NM

Ar mg/L - - NM NM NM 1.45 NM NM NM NM NM NM NM NM NM

Ba mg/L - - NM NM NM 23 NM NM NM NM NM NM NM NM NM

Be mg/L - - NM NM NM 0.05 NM NM NM NM NM NM NM NM NM

B mg/L - - NM NM NM 64 NM NM NM NM NM NM NM NM NM

Cd mg/L - - NM NM NM 0.24 NM NM NM NM NM NM NM NM NM

Co mg/L - - NM NM NM 0.23 NM NM NM NM NM NM NM NM NM

Cu mg/L - - NM NM NM 27.7 NM NM NM NM NM NM NM NM NM

Cr mg/L - - NM NM NM 1.7 NM NM NM NM NM NM NM NM NM

Cr III mg/L - - NM NM NM <0.05 NM NM NM NM NM NM NM NM NM

Cr IV mg/L - - NM NM NM <0.05 NM NM NM NM NM NM NM NM NM

Fe mg/L - - NM NM NM 552 NM NM NM NM NM NM NM NM NM

Hg mg/L - - NM NM NM 0.04 NM NM NM NM NM NM NM NM NM

Mg mg/L - - NM NM NM 2.4 NM NM NM NM NM NM NM NM NM

Mn mg/L - - NM NM NM 25.9 NM NM NM NM NM NM NM NM NM

Mo mg/L - - NM NM NM 0.6 NM NM NM NM NM NM NM NM NM

Pb mg/L - - NM NM NM 1.36 NM NM NM NM NM NM NM NM NM

Ni mg/L - - NM NM NM 24.5 NM NM NM NM NM NM NM NM NM

Se mg/L - - NM NM NM 0.4 NM NM NM NM NM NM NM NM NM

Sn mg/L - - NM NM NM 2.6 NM NM NM NM NM NM NM NM NM

Zn mg/L - - NM NM NM 121 NM NM NM NM NM NM NM NM NM

* Values above the trigger value are shown in orange text. There were no exceedances of the E Coli limit specified in EPL57-02.

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APPENDIX F:

STORMWATER MONITORING RESULTS

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Utilities stormwater discharge monitoring (SW-02)

Date

Utilities Stormwater (SW-02)

pH EC OIW

pH µs/cm mg/L

24 July 2016 -3 -3 3.8

14 August 2016 -3 -3 4.1

21 August 2016 6.2 108.6 0

29 August 2016 6.12 104.1 0

4 September 2016 5.79 105.2 0

19 September 2016 6.62 105.9 0

25 September 2016 6.55 106.2 0

16 October 2016 7.05 118.3 0.3

23 October 2016 7.01 118.3 0.2

30 October 2016 5.98 107.1 0.3

13 November 2016 6.38 106.2 0

20 November 2016 5.92 114.4 0

27 November 2016 6.1 117.6 0

4 December 2016 6.0 -3 0

11 December 2016 6.56 -3 0

25 December 2016 -3 113.2 0

1 January 2017 7.3 -3 0.3

10 January 2017 6.19 -3 0

15 January 2017 6.58 -3 2.4

22 January 2017 6.7 111.9 1.6

29 January 2017 6.37 108.9 3.4

Notes: 1 This table summarises the discharge monitoring between 1 January 2016 – 31 December 2016. 2 Prior to July 2016, the utilities stormwater was fed into the produced water treatment system and

part of the produced water stream discharged offshore. 3 Data not available.

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Open drains sump stormwater discharge monitoring (SW-03)

Date

Open Drains Sump (SW-03)

pH EC OIW

pH µs/cm mg/L

22 December 2016 6.86 193.6 -2

26 December 2016 -2 75.4 5.2

27 December 2016 -2 58.8 5.6

28 December 2016 -2 65.6 5.3

1 January 2017 -2 69.9 2.9

2 January 2017 -2 77.6 5.2

3 January 2017 -2 58.6 3.5

4 January 2017 6.34 50.75 3.1

23 January 2017 -2 -2 2.6

24 January 2017 5.45 -2 4.3

25 January 2017 5.93 -2 4.8

3 February 2017 6.62 -2 2.2

5 February 2017 6.43 -2 1.2

6 February 2017 6.05 -2 0.9

Notes: 1 This table summarises the discharge monitoring between 1 January 2016 – 31 December 2016. 2 Data not available.

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APPENDIX G:

GROUNDWATER MONITORING DATA

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Table G.1: Quarterly groundwater monitoring data 2016

Date sampled 8 March 2016 24 May 2016 7 Sep 2016 7 Dec 2016

Parameter Test method Units ADWG61 ANZECC2 BH5 BH5 BH7 BH7 BH5 BH7 BH5 BH7

pH ASTM D1287 - 6.5-8.5 6-8.5 5.47 5.29 5.56 5.78 5.62 5.87 5.71 5.36

EC APHA 2510 mS/cm - 900 221 176.2 184.1 61.3 197.2 77 206.1 183.4

Turbidity Turb1 NTU 5 - 480 150 186 87 210 250 150 400

DO HACH mg/L 85% 80-110% 7.1 7.1 7.3 5.8 8.1 5.8 8.4 7.2

OIW Turner TD3100 mg/L - - 73.41 18.61 8.6 3 7.1 4.3 6.2 8.4

TSS APHA 2540 D mg/L - - 221 278 354 2751 681 2620 704 1413

TDS APHA 2540 C mg/L 600 - 86.7 84.4 90.2 30.3 81 26 78 39

BOD APHA 5210 mg/L - - 12.3 12.2 16.1 12.4 15.3 17.3 17.6 16.8

TOC APHA 5310 B mg/L - - 3 3 4 2 6 3 3 3

COD WCL_13 mg/L - - <50 <50 <50 <50 <50 <50 <50 <50

NOx APHA No2B mg/L - - 1.5 1.1 1.7 0.74 2 1.3 1.9 1.3

Nitrate APHA No2B mg/L 503 - 1.5 1.1 1.7 0.75 2 1.3 1.9 1.3

Nitrite APHA No2B mg/L 34 17 <0.005 <0.005 <0.005 <.005 <0.005 <0.005 <0.005 <0.005

Ammonia APHA 4500 mg/L 0.5 - 0.03 0.02 0.12 0.014 0.008 <0.005 0.017 0.015

Total P ICP-AES mg/L - 320 2.41 1.62 2.1 1.1 1.4 1.8 1.4 1.8

Total N APHA no2B mg/L - - 3.11 2.43 3.5 1.5 4.7 3.4 4.6 3.1

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Date sampled 8 March 2016 24 May 2016 7 Sep 2016 7 Dec 2016

Parameter Test method Units ADWG61 ANZECC2 BH5 BH5 BH7 BH7 BH5 BH7 BH5 BH7

Tot. Coliform AS4276.21-2005 /100ml MPN - - 2 1 387 84 <1 <1 8 15

E. coli AS4276.21-2005 /100ml MPN 05 - <1 <1 <1 <1 <1 <1 <1 <1

HCC AS4276.3.1-2007 CFU/mL - - >3000 >3000 >3000 >3000 >3000 470 >3000 >3000

1 Aesthetic water quality criteria from the Australian Drinking Water Guidelines 6 (2011) version 3.2 (ADWG6). 2 Trigger value for 99% species protection from the Australian and New Zealand Guidelines for Fresh and Marine Water Quality, Volume 1. 3 Health water quality criteria (infant) from ADWG6, as there is no aesthetic criteria. 4 Health water quality criteria (adult) from ADWG6, as there is no aesthetic criteria. 5 Health water quality criteria (adult) from ADWG6, as there is no aesthetic criteria.

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Trends of key quarterly groundwater monitoring parameters

Figure G.1: Groundwater trends – pH

Figure G.2: Groundwater trends – EC

4.8

5

5.2

5.4

5.6

5.8

6

Aug 2015 Dec 2015 Apr 2016 Aug 2016 Dec 2016

pH

Groundwater trends - pH

BH5 BH7

0

50

100

150

200

250


Ele

ctri

cal c

on

du

ctiv

ity

(mS/

cm)

Groundwater trends - EC

BH5 BH7

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Figure G.3: Groundwater trends – TDS

Figure G.4: Groundwater trends – turbidity

Figure G.5: Groundwater trends – total suspended solids

0

10

20

30

40

50

60

70

80

90

100


Tota

l dis

solv

ed

so

lids

(mg/

L)

Groundwater trends - TDS

BH5 BH7

0

200

400

600

800

1000

1200


Turb

idit

y (N

TU)

Groundwater trends - turbidity

BH5 BH7

0

500

1000

1500

2000

2500

3000


Turb

idit

y (N

TU)

Groundwater trends - TSS

BH5 BH7

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Figure G.6: Groundwater trends – biochemical oxygen demand

Figure G.7: Groundwater trends – dissolved oxygen

Figure G.8: Groundwater trends – oil in water

0

5

10

15

20

25


BO

D, T

OC

, CO

D (

mg/

L)

Groundwater trends - BOD

BH5 BH7

0

1

2

3

4

5

6

7

8

9


Dis

solv

ed

oxy

gen

(m

g/L)

Groundwater trends - DO

BH5 BH7

0

20

40

60

80

100

120

140

160


Oil

in w

ate

r (m

g/L)

Groundwater trends - oil in water

BH5 BH7

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Figure G.9: Groundwater trends – NOx

Figure G.10: Groundwater trends – Total P

Figure G.11: Groundwater trends – Total N

0

0.5

1

1.5

2

2.5


NO

x (m

g/L)

Groundwater trends - NOx

BH5 BH7

0

0.5

1

1.5

2

2.5

3

3.5


Tota

l P (

mg/

L)

Groundwater trends - Total P

BH5 BH7

0

1

2

3

4

5


Tota

l N (

mg/

L)

Groundwater trends - Total N

BH5 BH7

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Figure G.12: Groundwater trends – Ammonia

Figure G.13: Groundwater trends – E.Coli

0

0.5

1

1.5

2


Am

mo

nia

(m

g/L)

Groundwater trends - Ammonia

BH5 BH7

0

500

1000

1500

2000

2500


E.C

oli

(pe

r 1

00

ml M

PN

)

Groundwater trends - E.Coli

BH5 BH7

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Table G.2: Results of further groundwater investigations

Report No. AU115-3286 AU115-3337

Date sampled 1 April 2016 24 May 2016

Parameter Test method Units BH5 BH5 BH7 BH7

Al ICP-MS μg/L 220 970 1100 2300

Ar ICP-MS μg/L <1 1 1 3

Ba ICP-MS μg/L 68 26 130 79

Be ICP-MS μg/L <0.5 <0.5 <0.5 <0.5

B ICP-MS μg/L 43 32 43 32

Cd ICP-MS μg/L 0.2 <0.1 0.1 <0.1

Co ICP-MS μg/L <1 <1 1 1

Cu ICP-MS μg/L 2 1 6 3

Cr ICP-MS μg/L <1 1 2 7

Fe ICP-MS μg/L 99 890 1500 4900

Hg ICP-MS μg/L <0.05 <0.05 <0.05 <0.05

Mn ICP-MS μg/L 48 16 120 71

Mo ICP-MS μg/L <1 <1 <1 <1

Pb ICP-MS μg/L <1 <1 3 6

Ni ICP-MS μg/L 2 <1 3 2

Se ICP-MS μg/L <1 <1 <1 <1

Sn ICP-MS μg/L <1 <1 <1 <1

Sr ICP-MS μg/L 5.2 1.7 14 9

Zn ICP-MS μg/L 26 19 9 3.7

TRH C6-C9 GC-MS μg/L <10 <10 <10 <10

TRH C6-C10 GC-MS μg/L <10 <10 <10 <10

TRH C6-C10 less BTEX GC-MS μg/L <10 <10 <10 <10

Benzene GC-MS μg/L <1 <1 <1 <1

Toluene GC-MS μg/L <1 <1 <1 <1

Ethylbenzene GC-MS μg/L <1 <1 <1 <1

m+p-xylene GC-MS μg/L <2 <2 <2 <2

o-xylene GC-MS μg/L <1 <1 <1 <1

napththalene GC-MS μg/L <1 <1 <1 <1

TRH C10-C14 GD-FID μg/L <50 <50 <50 <50

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Report No. AU115-3286 AU115-3337



TRH C15-C28 GD-FID μg/L <100 <100 <100 <100

TRH C29-C36 GD-FID μg/L <100 <100 <100 <100

TRH >C10-C16 GD-FID μg/L <50 <50 <50 <50

TRH >C10-C16 less Napth GD-FID μg/L <50 <50 <50 <50

TRH >C16-C34 GD-FID μg/L <100 <100 <100 <100

TRH >C34-C40 GD-FID μg/L <100 <100 <100 <100

TPH >C16-C35 Ali GD-FID μg/L <100 <100 <100 <100

TPH >C35 Ali GD-FID μg/L <100 <100 <100 <100

TPH C16-C35 Aro GD-FID μg/L <100 <100 <100 <100

Naphthalene GC-MS μg/L <1 <1 <1 <1

Acenaphthylene GC-MS μg/L <1 <1 <1 <1

Acenaphthene GC-MS μg/L <1 <1 <1 <1

Fluorene GC-MS μg/L <1 <1 <1 <1

Phenanthrene GC-MS μg/L <1 <1 <1 <1

Anthracene GC-MS μg/L <1 <1 <1 <1

Fluoranthene GC-MS μg/L <1 <1 <1 <1

Pyrene GC-MS μg/L <1 <1 <1 <1

Benzo(a)anthracene GC-MS μg/L <1 <1 <1 <1

Chrysene GC-MS μg/L <1 <1 <1 <1

Benzo(b,j+k)fluoranthene GC-MS μg/L <2 <2 <2 <2

Benzo(a)pyrene) GC-MS μg/L <1 <1 <1 <1

Indeno(1,2,3-c,d)pyrene GC-MS μg/L <1 <1 <1 <1

Dibenzo(a,h)anthracene GC-MS μg/L <1 <1 <1 <1

Benzo(g,h,i)perylene GC-MS μg/L <1 <1 <1 <1

Indeno*1,2,3-c,d)pyrene GC-MS μg/L <1 <1 <1 <1

Dibenzo(a,h)anthracene GC-MS μg/L <1 <1 <1 <1

Benzo(g,h,i)perylene GC-MS μg/L <1 <1 <1 <1

Benzo(a)pyrene TEQ GC-MS μg/L <5 <5 <5 <5

Total +ve PAHs GC-MS μg/L NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

NIL

(+)VE

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Report No. AU115-3286 AU115-3337



Phenol GC-MS μg/L <1 <1 - -

2-Chlorophenol GC-MS μg/L <1 <1 - -

4-Chloro-3-Methylophenol GC-MS μg/L <5 <5 - -

2-Methylphenol (O-Cresol) GC-MS μg/L <1 <1 - -

3/4-Methylphenol(m/p-

Cresol) GC-MS μg/L <2 <2 - -

2-Nitrophenol GC-MS μg/L <1 <1 - -

2,4-Dimethylphenol GC-MS μg/L <1 <1 - -

2,4-Dichlorophenol GC-MS μg/L <1 <1 - -

2,6-Dichlorophenol GC-MS μg/L <1 <1 - -

2,4,5-Trichlorophenol GC-MS μg/L <1 <1 - -

2,4,6-Trichlorophenol GC-MS μg/L <1 <1 - -

2,4-Dinitrophenol GC-MS μg/L <20 <20 - -

4-Nitrophenol GC-MS μg/L <20 <20 - -

2,3,4,6-Tetrachlorophenol GC-MS μg/L <1 <1 - -

2-methyl-4,6-

Dinitrophenol GC-MS μg/L <10 <10 - -

Pentachlorophenol GC-MS μg/L <5 <5 - -

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Twice-weekly groundwater monitoring trends

Figure G.14: Twice-weekly groundwater level

Figure G.15: Twice-weekly groundwater conductivity trends

0

2

4

6

8

10

12

14

16

14/01/2008 9/04/2009 9/07/2010 5/03/2012 9/08/2013 14/11/14 16/12/15 28/12/16

Leve

l bel

ow

gro

un

d (

m)

Time

Water table level

BH5 BH7 Benchmark level below ground

0

50

100

150

200

250

14/01/2008 9/04/2009 9/07/2010 5/03/2012 9/08/2013 14/11/14 16/12/15 28/12/16

Elec

tric

al C

on

du

ctiv

ity

(mic

roSi

emen

s/cm

)

Time

Twice-weekly groundwater conductivity

BH5 BH7 EC max limit

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PR-OP 02



Figure G.16: Twice-weekly groundwater pH trends

Note: During twice-weekly monitoring, pH is determined using litmus paper.

0

2

4

6

8

10

12

14/01/2008 9/04/2009 9/07/2010 5/03/2012 9/08/2013 14/11/14 16/12/15 28/12/16

pH

leve

l

Time

Twice-weekly groundwater pH

BH5 BH7 pH min limit pH max limit

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