Condabri Groundwater Monitoring Plan - Australia...The purpose of this Peat Produced Water Storage...

Plan OEUP-Q8100-PLN-ENV-002

Peat Produced Water Storage Facility Groundwater Monitoring Plan LNG Operations Environmental Monitoring Program

Review Record

Rev Date Reason for Issue Prepared Checked Approved

0 01/02/2011 Issued for Use J McC

1 10/01/2014 Issued for Use Klohn Crippen Berger

M Jeffs R Haward

P Egerton

Next Review Date: 07/01/2016

*Please see Document Information and History section for more information.

For internal Origin use and distribution only. Subject to employee confidentiality obligations.

Once printed, this is an uncontrolled document unless issued and stamped Controlled Copy or issued under a transmittal.

Peat Groundwater Monitoring Plan OEUP-Q8100-PLN-ENV-002

Released on 10/01/2014 – Revision 1 – Approved Process Owner is LNG Production Operations HSSE Manager

Origin Energy Resources Limited: ABN 66 007 845 338 of 30 Once printed, this is an uncontrolled document unless issued and stamped Controlled Copy or issued under a transmittal. Template: Upstream Information Management & Engineering Systems Manager_Revision 4_26/09/2013_OEUP-1000-TMP-BUS-001

Table of Contents

1. Purpose 4

2. Scope 4

3. Accountabilities and Responsibilities 4

4. Definitions/Acronyms 9

5. Requirements 11

5.1 Commitments 11

5.2 General HSE 11

5.3 Groundwater Monitoring Infrastructure 11

5.3.1 Monitoring Bore Design, Installation and Maintenance 11 5.3.2 Disturbance Approvals 12

5.4 Groundwater Monitoring Program 12

5.4.1 Monitoring Locations 13 5.4.2 Monitoring Parameters and Frequency 15 5.4.3 Monitoring Methodology 16

5.5 Interpretation and Assessment of Results 17

5.5.1 Trigger Values 18 5.5.2 Trigger Value Exceedance - Investigation and Response 18

5.6 Reporting 19

6. Competency and Training 19

6.1 Monitoring Bore Drilling 19

6.2 Groundwater Monitoring Bore Sampling and Development 20

6.3 Assessment and Annual Report 20

6.4 Competency Assessment 20

7. Record Keeping 20

8. References/Associated Documents 20

9. Compliance 21

10. Document Information and History 22

Table of Figures

Figure 1: PGMP Task Structure 6




List of Tables

Table 1: Accountabilities in the PGMP 4

Table 2: Responsibilities in the PGMP 6

Table 3: Definitions of terms used in PGMP 9

Table 4: Containment Facility Infrastructure 13

Table 5: Monitoring Bore infrastructure 13

Table 6: Field Analysis Parameters* 15

Table 7: Laboratory Analysis Parameters 16

Table 8 Minimum Requirements for water monitoring under the Peat EA 21

Table 9: Quality Assurance/Quality Control Sample Quantity and Frequency 27

List of Appendices

Appendix A Regulated Dams and Groundwater Monitoring Locations 23

Appendix B Quality Data Control 27

B.1. Sampling Quality Assurance/Quality Control 27

B.2. Equipment Maintenance 28

B.3. Chain of Custody 28

B.4. Laboratory Analysis 29

Appendix C Trigger Value Exceedance 30

C.1. Determining UCL and LCL 30

C.2. Determining a Trigger Value Exceedance 30




1. Purpose

The purpose of this Peat Produced Water Storage Facility Surface and Groundwater Monitoring Plan (PGMP) is to document the actions that Origin Energy (OE) will undertake to ensure compliance with the Peat Environmental Authority (EA) [Permit Number PEN100493710] schedule C conditions C6 through C17 and schedule D conditions D1 through D11. This monitoring plan applies to all OE and contractor personnel accountable for Environmentally Relevant Activities (ERA) described in Schedule 5A of the Environmental Protection Regulation (2008), on Petroleum Lease Application (PLA) 101.

2. Scope

The PGMP is to be applied to all existing and future produced water containment facilities located in the Peat development area, described as PL101.

The objectives of the PGMP include:

• Establishment of background groundwater quality data to create appropriate benchmarks for monitoring criteria.

• Monitoring of groundwater quality and level trends for the purposes of assessing possible seepage from produced water containment facilities and associated impacts to groundwater.

• Outlining the triggers for additional monitoring/investigation to respond to potential seepage events.

• If groundwater contamination is caused by the petroleum activities, the following objectives also apply:

• Creation of a geodetic survey to determine the relative water surface elevations of groundwater in metres relative to the Australian Height Datum (AHD).

• Estimation of groundwater flow direction, groundwater flow rate and hydraulic conductivity.

3. Accountabilities and Responsibilities

The accountabilities for the groundwater tasks associated with this PGMP are outlined in Table 1.

Table 1: Accountabilities in the PGMP

Accountable Person

Business Unit

Project Stage Accountabilities

Environmental Compliance Manager

ALS Operate Act as the single point of contact for communication between the site/project and Department of Environment and Heritage Protection (EHP)

Submit monitoring data, analysis and assessment to EHP in accordance with reporting requirements

Notify relevant authority, landholder and any other relevant stakeholder of any trigger exceedance or other possible signs of seepage or other significant adverse changes in trends within required notification time




Accountable Person

Business Unit

Project Stage Accountabilities

HSE Manager - Operations

Exploration & Production

Operate Communicate the expectations of this plan to applicable personnel and ensure that they conform to the requirements of the plan

Provide sufficient training, support and resources for the relevant personnel to competently carry out their designated task/s

Lead Environmental Advisor – Operations (assisted by Environmental Solutions)

Exploration & Production

Operate Implement, maintain, and review this plan

Provide technical advice and assistance to the site/project supervisor/s for collection and analysis of samples and data

Periodically audit work carried out under the PGMP to ensure compliance with the plan

Overall project management including setting and managing budgets, schedules, and reporting

Acquire all relevant site access approvals, permits, landholder notification etc. prior to conducting work

Ensure all relevant QA/QC protocols are deployed during sampling

Personnel Conducting Monitoring/Reporting Activities

Environment Technical Services

Operate Escalate to the Lead Environmental Advisor – Operations Environment Team Lead - Monitoring and Assurance any trigger exceedance or other possible signs of seepage or other significant adverse changes in trends such that these can be reported to the relevant authority within required notification timeframes

Ensure that the requirements of this plan are adhered to and monitoring is undertaken in accordance with the DERM (now EHP) Water Quality Monitoring and Sampling Manual 2009

Participate in all necessary training Complete and submit all

documentation required by this plan Maintain equipment and calibration

records

A breakdown of the tasks associated with this plan, and linked to the project delivery process is illustrated in Figure 1.




Figure 1: PGMP Task Structure

Responsibility of performing the tasks associated with this PGMP is delegated to other parties within Origin, and to contractors outside the business, as outlined in Table 2.

Table 2: Responsibilities in the PGMP

Monitoring Bore Construction

Role Task Stage Responsibility

Senior Hydrogeologist

Design Ensure appropriate monitoring bore design and placement.

Project Manager Design Coordinate the final bore locations with Senior Hydrogeologist;

Construct Project manage the installation of monitoring bores around newly constructed regulated dams, including setting and managing budgets, schedules, and reporting;

Engage drilling and hydrogeologist contractors, and ensure that they conform to the requirements of this PGMP; and

Provide drilling and hydrogeological contractors with locations on the design drawings for the bores, standard drawing for bores, a specification for the monitoring bores, and scope of work including reporting requirements;

Acquire all relevant site access approvals, permits, and landholder notification prior to conducting bore installation work; and

Report Communicate the construction of new monitoring bores to WTF Supervisor, and the ETS Senior Environmental Advisor to be incorporated in the Shallow Groundwater Monitoring Program; and

Forward monitoring bore installation report to relevant stakeholders.

Develop Design

Execute Construct Report

Operate Sample Report Maintain

PDP Stage Groundwater Monitoring Stage




Monitoring Bore Construction


Drilling Contractor

Construct Perform drilling and completion of water bores; and

Complete and submit daily drilling reports and drilling logs to the Project Manager.

Hydrogeologist Contractor

Construct

Complete geological logging and oversee geological/hydrogeological aspects of the drilling and completion (e.g. total depth and screened intervals);

Perform groundwater monitoring during the development of monitoring bores;

Sample water quality post development of newly installed bores; and

Co-ordinate surveying of newly installed bores.

Report Complete and submit monitoring bore installation report to the Project Manager.

Groundwater Monitoring


ETS Senior Environmental Advisor

Sample Overall project management of shallow groundwater monitoring program, including schedules, and reporting;

Engage hydrogeoglist contractor, and ensure that they conform to the requirements of the plan; and

Acquire all relevant site access approvals, permits, landholder notification etc., prior to conducting work.

Report

Escalate trigger value exceedance to the Lead Environmental Advisor - Operations;

Report dates of monitoring to the Environmental Consultant;

Assist Environmental Compliance and Assurance Team Lead during compilation of Annual Reports.

Maintain Maintain records of monitoring bore installation reports, and shallow groundwater monitoring reports and other related documentation; and

Update this PGMP and the Shallow Groundwater Monitoring Program, when advised of new monitoring infrastructure.

Sampling and Hydrogeology Contractor

Sample Perform purging and sampling of groundwater bores; and

Perform sampling of surface water (regulated dams).






Report Complete and submit groundwater monitoring reports;

QA/QC, analysis and interpretation of field and laboratory results;

Enter data into ESdat; Update UCLs and LCLs annually; Submit Annual Groundwater Monitoring

Reports to ETS Senior Environmental Advisor; and

Escalate any trigger value exceedance or other possible signs of seepage or other significant adverse changes in trends to the ETS Senior Environmental Advisor such that these can be internally escalated and reported to the relevant authority within required notification timeframes.

Maintain Maintain equipment and calibration records (submit attached to Report); and

Raise maintenance requests to the WTF Supervisor when issues with monitoring bore infrastructure are identified.

Lead Environmental Advisor - Operations

Report Coordinate review (including technical review with Senior Hydrogeologist, and other technical staff if required) of installation reports and groundwater monitoring reports.

Initiate trigger value exceedance response; Communicate trigger value exceedance to

the WTF Supervisor, Peat Asset Manager and Environmental Compliance and Assurance Team Lead; and

Assist Environmental Compliance and Assurance Team Lead during compilation of Annual Reports.

Maintain Periodically audit work carried out under this PGMP to ensure compliance with the plan.

ETS Field Environmental Advisor

Sample Undertake standing water level measurements during water level sampling period; and

Enter result into ESdat.

Maintain Raise maintenance requests to the WTF Supervisor when issues with monitoring bore infrastructure are identified.

Senior Hydrogeologist

Report Provide technical review of Monitoring Bore Installation Reports, and Shallow Groundwater Monitoring Reports, on request of the Lead Environmental Advisor - Operations.






Environmental Consultant

Report Update the Register of Regulated Dams with dates of monitoring shallow groundwater.

Environmental Compliance and Assurance Team Lead

Report Report non-compliance to regulator; and Collate monitoring data for submission in the

Peat annual environmental report.

The responsibilities for all the tasks outlined in this PGMP shall be contained within the Master Obligations Register (currently in development).

4. Definitions/Acronyms

Table 3: Definitions of terms used in PGMP

Term/Acronym Definition/Expansion

Aquifer An underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, or silt) from which groundwater can be extracted using a bore.

Bore A hole drilled into the ground and appropriately completed for the abstraction or monitoring of groundwater.

Containment facility See dam.

Dam Any land-based structure or a void that is designed to contain, divert or control flowable substances, and includes any substances that are thereby contained, diverted or controlled by that land-based structure or void and associated works. In this context a dam does not mean fabricated or manufactured tank or contained, designed and constructed to an Australian Standard that deals with strength and structural integrity of that tank or container.

ESdat A centralised database for the storage of all water quality data. ESdat allows for management of data, task tracking, and provides a systematic approach to record keeping.

Groundwater Groundwater is water located beneath the earth's surface in soil / rock pore spaces and in the fractures of rock formations.

Piezometer (bore) Seepage detection bore that is drilled into a shallow horizon (typically 5-10 metres), and is designed to detect horizontal seepage through a dam’s floor/wall or lateral movement of a seepage wetting front.

Pond See dam.

Register of Regulated Dams

The Register of Regulated Dams is a spreadsheet that lists all of LNG Operations regulated dams. It includes information regarding the dam’s purpose, hazard category, location, size, MRL, etc., provides links to other related documents, such as design plans, and ‘as constructed’ drawings, and provides dates for annuals inspections and water quality monitoring etc.

Regulated dam Any dam in the significant or high hazard category as assessed using the Manual for Assessing Hazard Categories and Hydraulic




Term/Acronym Definition/Expansion Performance of Dams published by the regulator.

Seepage Water from a containment facility that has moved beyond the dam floor/wall, potentially into underlying groundwater.

Shallow Aquifer Bore Seepage detection bore that is drilled and completed in the shallowest aquifer beneath the dam. Designed to detect vertical seepage and lateral migration of seepage in groundwater under dams.

AHD Australian Height Datum

ALS Australian Laboratory Services

BTEX Sum of benzene, toluene, ethylbenzene, ortho-xylene, para-xylene, and meta-xylene

PGMP Peat Groundwater Monitoring Plan

CG Coordinator General

COC Chain of Custody

CSG Coal Seam Gas

DNRM Department of Natural Resources and Mines

EA Environmental Authority

EC Electrical Conductivity

EHP Department of Environment and Heritage Protection

EIS Environmental Impact Statement

EP Environmental Protection

ERA Environmentally Relevant Activity

ETDCS Engineering Technical Document Control System

ETS Environmental Technical Services

GL Ground Level

HSE Health, Safety and Environment

HSSE Health, Safety, Security and Environment

LCL Lower Control Limits

MRL Mean Reference Level

MS Matrix Spike

MSD Matrix Spike Duplicate

NATA National Association of Testing Authorities

OE Origin Energy

PDP Project Delivery Process

PL Petroleum Lease

PO Purchase Order

QA/QC Quality Assurance/Quality Control

QLD Queensland




Term/Acronym Definition/Expansion

SAR Sodium Adsorption Ratio

SOP Standard Operating Procedure

TOC Top of Casing

UCL Upper Control Limits

UTM Universal Transverse Mercator (coordinate system)

5. Requirements

The following section outlines the requirements for the PGMP.

5.1 Commitments

Internal and external HSE obligations relevant to this PGMP include:

• External:

Peat Environmental Authority (EA) PEN101674310 conditions (EP Act 1994); and,

Australia Pacific LNG EIS Coordinator General Report.

• Internal:

Australia Pacific LNG Environmental Impact Statement (Australia Pacific LNG EIS);

Water Management Directive;

Peat Environmental Management Plan OEUP-Q8100-PLN-ENV-001; and,

CSG Operations Safety Management Plan OEUP-Q1000-PLN-SAF-014

5.2 General HSE

Personnel conducting environmental monitoring activities described in the PGMP shall have undertaken OE’s Health, Safety and Environment (HSE) modules 0, 1.

Appropriate permits, including landowner property access authority, must be obtained prior to commencement of any works.

During operation, a Peat site induction will also be required. Site Superintendents shall be notified 28 days in advance of all upcoming works. Notification shall be undertaken using the following electronic form:

http://enebrisweb02/visitorrequest/pages/index.aspx

A record of HSE training and competency shall be kept by OE’s Organisational Capability Group.

5.3 Groundwater Monitoring Infrastructure

In addition to the testing/sampling, the monitoring of shallow groundwater around containment facilities involves three other key stages: design of bores, installation/development of bores, and maintenance of bore infrastructure.

5.3.1 Monitoring Bore Design, Installation and Maintenance

All groundwater monitoring bores shall be designed, installed and maintained according to the standards outlined in the:

• Minimum Construction Requirements for Water Bores in Australia 2012;

• Minimum Standards for the Construction and Reconditioning of Water Bores that Intersect the Sediments of Artesian Basins in Queensland 2010; and

http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-Q8100-PLN-ENV-001.pdf

http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-Q1000-PLN-SAF-014.pdf

http://enebrisweb02/visitorrequest/pages/index.aspx




• Specification for Drilling and Completion of Shallow Groundwater Monitoring Bores and Piezometers Q-1805-15-MP-1001.

Monitoring bores will be designed to intersect and monitor groundwater encountered at the first significant ‘water strike’ considered to be indicative of a permanent water bearing zone (aquifer). This will be observed and logged by the hydrogeologist during drilling.

At some sites where geological conditions are suitable, shallower ‘seepage detection piezometers’ may be constructed above the water within a formation considered to be a receptor of any downward migrating seepage. This zone may be dry during drilling, or may contain temporarily (seasonally) perched water which may percolate to a lower permanent aquifer. These piezometers if installed would provide an additional early detection monitoring defence.

Other requirements include the following:

• The drilling contractor must be a licensed water bore driller through the Department of Natural Resources and Mines (DNRM);

• Lease sites are prepared in accordance to the Generic Drilling Lease – Ground Water Bores with Darr Rig 1 Q-1000-35-DG-064;

• Monitoring of the development of each groundwater monitoring bore shall be undertaken in accordance with the Standard Operating Procedure (SOP) Supervision of Bore Development by Air Lifting OEUP-Q1000-SOP-OPS-014;

• Water quality samples shall be collected post development. Monitoring wells are to be left for a minimum of 7 days to equilibrate prior to purging and sampling (unless otherwise agreed). Sampling of groundwater monitoring bores is covered in section 5.4.3.

• The geology of each monitoring bore shall be recorded in accordance with AS 1726-1993 Geotechnical site investigations; and

• Newly installed bores shall be surveyed by an accredited surveyor to determine the elevations of Top of Casing (TOC) and ground level (GL) adjacent to the bore in Australian Height Datum (AHD) to facilitate ongoing measurements of depth to groundwater, calculations of inferred groundwater flow gradients and seepage velocities, and GPS coordinates.

5.3.2 Disturbance Approvals

All Origin Energy production activities that involve the disturbance of land must follow the Disturbance Procedure OEUP-Q1000-PRO-ENV-001 in order to receive approval to perform the work. The installation of groundwater monitoring infrastructure is one such activity that requires disturbance approval.

Groundwater monitoring infrastructure for new dams shall be included within the disturbance approval for the dam’s construction. Retrospective groundwater monitoring infrastructure around dams requires a specific disturbance approval.

5.4 Groundwater Monitoring Program

The groundwater monitoring program includes two aspects: monitoring the groundwater from bores surrounding a containment facility, and monitoring of the water quality of the containment facility itself.

The monitoring of the groundwater surrounding regulated dams is performed to identify any seepage from the containment facility. Such seepage can have a material environmental impact on the surrounding ecology, and can also weaken the integrity of the dam itself. The requirement for groundwater monitoring around regulated dams is derived from Schedule C of the Peat Gas Plant EA.

The monitoring of the water quality in regulated dams is used to determine how best to respond to uncontrolled releases, or to identify problems downstream of the dam. There

http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-Q1000-SOP-OPS-014.pdf

http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-Q1000-PRO-ENV-001.pdf




are no specific limits that apply to the surface water quality of regulated dams. The requirement for surface water quality monitoring is provided in Schedule N of the Peat Gas Plant EA.

5.4.1 Monitoring Locations Containment facilities within the Peat gas field are summarised in Table 4, and locations are shown in Appendix A.

Table 4: Containment Facility Infrastructure

Containment Facility Purpose Hazard Category

X Coordinates (UTM)

Y Coordinates (UTM)

P-EP01 Peat Facility evaporation ponds

High 208941 7119954

P-EP05 High 208934 7120237

P-EP02 Peat 32 Well evaporation ponds

High 209480 7115998

P-EP03 High 208805 7116205

P-EP04 Peat 12 Well evaporation pond

High 208832 7116184

Groundwater monitoring bore infrastructure is summarised in Table 5, and shown in Appendix A.

Table 5: Monitoring Bore infrastructure

Locality Contain-ment

Facility

Bore Name

Bore Type

X Coordinates

(UTM)

Y Coordinates

(UTM)

Well Depth (metres

below TOC)

Survey TOC Level

(mAHD)

Peat Facility P-EP01

PEA-MBS001

Shallow Seepage

209013 7119931 3.47 277.65

PEA-MBS002

Shallow Seepage

209013 7119953 4.10 277.91

PEA-MBS003

Shallow Seepage

208902 7119966 5.65 279.16

PEA-MBS004

Shallow Seepage

208913 7119935 6.09 279.05

PEA-MBS005

Shallow Seepage

208922 7119909 3.93 278.11

PEA-MBS006

Shallow Seepag

208936 7119885 4.75 278.41





Facility

Bore Name

Bore Type

X Coordinates

(UTM)

Y Coordinates

(UTM)

Well Depth (metres

below TOC)

Survey TOC Level

(mAHD) e

PEA-MBS007

Shallow Seepage

208973 7119886 2.20 277.93

PEA-MBS008

Shallow Seepage

208995 7119886 5.45 277.64

PEA-MBS009

Shallow Seepage

209068 7120088 5.75 279.85

PEA-MBS010

Shallow Seepage

209002 7120098 5.78 279.75

PEA-MBS011

Shallow Seepage

208917 7120103 5.55 279.77

PEA-MBS012

Shallow Seepage

208895 7120095 5.74 279.83

PEA-MBS013

Shallow Seepage

208915 7119881 4.28 277.95

PEA-MBS014

Shallow Seepage

208972 7119899 5.31 277.2

PEA-MBS015

Shallow Seepage

208918 7119940 4.57 277.67

Peat 32 P-EP02

PEA-MBS016

Shallow Seepage

209562 7115914 2.86 273.12

PEA-MBS017

Shallow Seepage

209620 7116006 2.76 271.74

PEA-MBS018

Shallow Seepag

209525 7116060 2.84 270.19





Facility

Bore Name

Bore Type

X Coordinates

(UTM)

Y Coordinates

(UTM)

Well Depth (metres

below TOC)

Survey TOC Level

(mAHD) e

PEA-MBS019

Shallow Seepage

209471 7115966 2.86 270.75

Peat 12 P-EP04 PEA-MBS020

Shallow Seepage

208770 7116149 5.33 262.69

5.4.2 Monitoring Parameters and Frequency Field and laboratory analysis parameters for groundwater and surface water are summarised in Table 6 and Table 7.

Groundwater parameters are to be monitored biannually at a minimum, with the exception of standing water level, which is to be monitored quarterly at a minimum.

Table 6: Field Analysis Parameters*

Parameter Units Groundwater Surface Water

Standing Water level M

(below GL and TOC)

x

Groundwater Pressure in Geological Strata** kPa x

pH - x x

Electrical Conductivity (EC) µS/m x x

Total Dissolved Solids mg/L x x

Temperature °C x x

Turbidity NTU x

Dissolved Oxygen mg/L x

*Measurements taken in the field at the time of sampling using a field water quality meter and water level meter (or dedicated pressure transducer).

**Only in the case of artesian bores fitted with the appropriate equipment.




Table 7: Laboratory Analysis Parameters

Parameter Units Groundwater Surface Water

pH - x x

EC µS/m x x

Total Dissolved Solids mg/L x x

Temperature ºC x

Alkalinity (Bicarbonate, Carbonate, Hydroxide and Total as CaCO3)

mg/L x x

Residual Alkalinity mg/L x x

Sodium Adsorption Ratio (SAR) - x x

Anions (Bicarbonate, Carbonate, Chloride, Fluoride, Sulphate) mg/L x x

Cations (Aluminium, Calcium, Magnesium, Potassium, Sodium) mg/L x x

Silica mg/L x x

Dissolved and total metals ( aluminium, arsenic III, barium, boron, cadmium, chromium III, copper, iron, lead, manganese, mercury, nickel, selenium, strontium silver, and zinc)

µg/L x x

Total Phosphorus as Phosphorus mg/L x x

Ammonia, Nitrate and Nitrite as Nitrogen mg/L x x

Total Petroleum Hydrocarbons µg/L x x

BTEX (as benzene, toluene, ethylbenzene, ortho-xylene, para-xylene, meta-xylene and total xylene)

µg/L x x

Polycyclic Aromatic Hydrocarbons (Naphthalene, Phenanthrene, Benzo[a]pyrene)

µg/L x x

Chlorophyll a µg/L x

Total Cyanobacteria Biovolume cells/mL x

5.4.3 Monitoring Methodology The requirements within this PGMP have been developed to comply with the following standards:

• Department of Environment and Heritage Protection (EHP) Monitoring and Sampling Manual 2009;

• Geoscience Australia Groundwater Sampling and Analysis - A Field Guide;

• AS/NZS 5667 11 1998 (Water Sampling Guidelines - Part 11 Guidance on sampling groundwater); and




• National Environmental Protection (Assessment of Site Contamination) Measures (NEPM) 1999.

Where this specified methodology is not followed because of exceptional circumstances, this must be explained and reported with the results.

Information regarding Quality Assurance/Quality Control (QA/QC), equipment maintenance, chain of custody, data management, and laboratory analyses is outlined in Appendix B.

5.4.3.1 Groundwater Sampling

Groundwater sampling shall be undertaken in accordance with the following:

1. For high flow purging techniques, a minimum of three purging volumes should be removed from the well prior to sampling;

2. For high and low flow sampling techniques, purging shall continue until field groundwater quality parameters stabilise in accordance with the following:

a. 0.1 unit pH;

b. 0.5 degrees temperature; and

c. 10% EC.

3. Where the bore becomes dry before 3 purging volumes are extracted, the bore shall be allowed sufficient time to recover before sampling;

4. Sampling for volatile and semi volatile analytes shall be collected first; and

5. A conscious effort shall be applied to avoid aerating samples during collection, bottling and transportation.

Given the range in depths and types of monitoring bores, it is anticipated that several methods of sampling may be utilised to collect water samples. Sampling methods will be selected to minimise the volume of purge water required, while ensuring the samples collected are representative of the aquifer water quality.

The following SOPs shall be utilised when utilising the relevant sampling method:

• Purging bores OEUP-Q1000-SOP-OPS-033;

• Inertia (Power) Pump Groundwater Sampling OEUP-Q1000-SOP-OPS-019;

• Bailing OEUP-Q1000-SOP-OPS-015;

• Low flow bladder pump operations OEUP-Q1000-SOP-OPS-027;

• Small Electric Submersible Pump OEUP-Q1000-SOP-OPS-023;

• Measuring Standing Water Level (Baseline Monitoring) OEUP-Q1000-SOP-OPS-028; and

• Water Sampling and Analysis OEUP-1000-PRO-PIP-015.

5.4.3.2 Surface Water Sampling

Surface water samples of regulated dams must be taken from at least three different dam profile depths for each sampling event where depth permits, and be taken as far as practicable from the edge of the regulated dam.

The SOP Surface Water Sampling OEUP-1000-PRO-ENV-001 shall be used when utilising the relevant sampling method.

5.5 Interpretation and Assessment of Results

The interpretation and assessment of results shall be performed by a suitably qualified person, and follow the guidelines set below.







http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-1000-PRO-PIP-015.doc





5.5.1 Trigger Values Analyses and test results shall be reviewed within five business days after receipt of results, to identify potential groundwater contamination. Results shall be compared to trigger values of greater than a 10% increase on the average result. Once 3 years of reliable data is collected for each parameter, the interim trigger values will be replaced with lower control limits (LCL) and upper control limits (UCL). The LCL and UCL shall be updated annually.

This type of limit is commonly used to determine whether an observed value is significantly different from historical values. The calculation of LCL and UCL, and determining a trigger value exceedance is shown in Appendix C.

5.5.2 Trigger Value Exceedance - Investigation and Response The process for escalating a trigger value exceedance is provided below.

Where a trigger value is exceeded, the following phased investigation shall be implemented:

• Sampler shall notify the Environmental Technical Services (ETS) Senior Advisor within 24 hours of any changes / anomalies from previous field data or laboratory analysis.

• ETS Senior Advisor notifies Lead Environment Advisor Operations and Environmental Compliance and Assurance Team Lead to discuss the finding and whether further escalation is required within 24hours.

• ETS Senior Advisor and Lead Environment Advisor Operations to arrange the collection of a sample to verify the result within 7 days of being informed of a potential exceedance.

• Lead Environment Advisor Operations notifies Asset manager of verified exceedance and proposed action to validate the result.




• Environmental Compliance and Assurance Team Lead to provide notification to the Regulator within 48hours of the sample results being verified.

• Asset manager (with support from Lead Environment Advisor) to arrange a re-occurring update meeting (initially biweekly) with the following key stakeholders:

o Asset Manager (Accountable for meeting & meeting minutes) o Environmental Technical Services

Senior Advisor ETS manager (optional)

o Lead Environment Advisor Operations o Environmental Compliance and Assurance Team Lead o Water Solutions representation

Senior Hydrologist Senior Water Development Analyst Water Development Manager (optional)

• Asset Manager to keep Production Operations Manager informed of the findings and progress.

• Once the team has determined the change in result or anomaly is valid and pond seepage is confirmed, the following actions are required:

o Lead Environment Advisor ensures the incident notification process is initiated as per procedure OEUP-Q1000-PRO-ENV-006 for managing environmental incidents in Operations and ensure the incident is recorded in OCIS.

If deemed notifiable to EHP, Environmental Compliance and Assurance Team Lead notifies EHP and Australian Pacific LNG as per Q-LNG01-15-AW-0004.

o Asset Manager informs Production Operations Manager that pond seepage is confirmed for escalation within the business.

o Asset manager ensures a full RBI investigation is initiated. o Environmental Technical Services Senior Advisor documents this.

• Once the team has determined the change in result or anomaly is not valid and pond seepage deemed not to be occurring, then the following needs to occur:

o Environmental Technical Services Senior Advisor documents this for inclusion in the report.

Further details of the exceedance investigation and response methodology are provided in the Australia Pacific LNG Phase 1 Groundwater Monitoring Plan Q-LNG01-10-MP-0005.

5.6 Reporting

Reporting to the regulator shall be conducted in accordance to the LNG Operations Environmental Monitoring Plan.

In addition, after each shallow groundwater monitoring round is complete, the dates of monitoring must be forwarded to the Infrastructure and Campaign Works team to update the Register of Regulated Dams.

6. Competency and Training

All personnel assigned to undertake monitoring activities associated with this PGMP must meet the requirements set out in the Peat Safety Management Plan.

6.1 Monitoring Bore Drilling

All drilling shall only be undertaken by a licensed water bore driller that has been HSSE pre-qualified and has the relevant training, skills and previous experience in conducting water bore drilling.




6.2 Groundwater Monitoring Bore Sampling and Development

All monitoring shall only be undertaken by suitably qualified and experienced person(s) or under the immediate instruction of such. A suitably qualified and experienced person is defined as a person who:

• Has relevant professional qualification, training, skills and a minimum of two years previous experience in conducting groundwater monitoring activities; and

• Demonstrates sufficient understanding of fundamental environmental monitoring requirements, principles and techniques for the specific environmental aspect i.e. EHP Monitoring and Sampling Manual 2009, Environmental Protection (Water) Policy 2009, and Geoscience Australia Groundwater Sampling and Analysis - a Field Guide.

6.3 Assessment and Annual Report

All assessment and interpretation of monitoring data for the purposes of the annual monitoring report shall be undertaken by a suitably qualified and experienced person. Such a person is defined as someone who has the following:

• A minimum of five years experience in undertaking groundwater data analysis and reporting; and

• Ability to demonstrate the skill and knowledge required to carry out the task in accordance with the objectives of this PGMP.

6.4 Competency Assessment

Competency of employees undertaking groundwater monitoring activities shall be determined during the recruitment process, and by each employee’s supervisor.

Competency of contractors undertaking groundwater monitoring activities shall be determined during the tender assessment process.

7. Record Keeping

Chain of Custody (COC), calibration forms, raw laboratory results, and internal audit findings associated with this PGMP shall be recorded, compiled, and attached to the annual groundwater monitoring report. All monitoring reports shall also be kept on Engineering Technical Document Control System (ETDCS).

All bore construction reports and bore-specific data sheets shall also be kept on the ETDCS.

This PGMP and other groundwater monitoring plans are stored on EPOMS.

8. References/Associated Documents

1. Master Obligations Register;

2. Peat EA PEN100493710;

3. Water Management Directive ORG-HSE-DVE-024;

4. Minimum Construction Requirements for Water Bores in Australia 2012;

5. Minimum Standards for the Construction and Reconditioning of Water Bores that Intersect the Sediments of Artesian Basins in Queensland 2010;

6. Disturbance Procedure OEUP-Q1000-PRO-ENV-001;

7. EHP Monitoring and Sampling Manual 2009;

8. Geoscience Australia Groundwater Sampling and Analysis - a Field Guide;

9. Surface Water Sampling OEUP-1000-PRO-ENV-001;

http://eaptecheng/drawing/search/

http://eaptecheng/drawing/search/

http://upstreamportal/Applications/EPOMS/Interfaces/Document%20Level.aspx


http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-1000-PRO-ENV-001.pdf




10. Purging bores OEUP-Q1000-SOP-OPS-033;

11. Inertia (Power) Pump Groundwater Sampling OEUP-Q1000-SOP-OPS-019;

12. Bailing OEUP-Q1000-SOP-OPS-015;

13. Low Flow Bladder Pump Operations OEUP-Q1000-SOP-OPS-027;

14. Small Electric Submersible Pump OEUP-Q1000-SOP-OPS-023;

15. Measuring Standing Water Level (Baseline Monitoring) OEUP-Q1000-SOP-OPS-028

16. Water Sampling and Analysis OEUP-1000-PRO-PIP-015;

17. Supervision of Bore Development by Air Lifting OEUP-Q1000-SOP-OPS-014;

18. Water Sampling Guidelines AS/NZS 5667 11 1998; and

19. Australia Pacific LNG Phase 1 Groundwater Monitoring Plan Q-LNG01-10-MP-0005.

20. Specification for Drilling and Completion of Shallow Groundwater Monitoring Bores and Piezometers Q-1805-15-MP-1001.

21. Peat Environmental Management Plan OEUP-Q8100-PLN-ENV-001; and,

22. CSG Operations Safety Management Plan OEUP-Q1000-PLN-SAF-014

23. Lease sites are prepared in accordance to the Generic Drilling Lease – Ground Water Bores with Darr Rig 1 Q-1000-35-DG-064.

9. Compliance

Origin requires all personnel and contractors undertaking the relevant monitoring activities to comply with the requirements of this plan. Compliance with this directive will be periodically monitored by the site/project supervisor or delegate and will be included in the scope of all relevant internal and external audits/reviews.

Table 8 details the minimum requirements for groundwater sampling frequency and parameters to be analysed as defined by the Peat EA. The administrating authority must be notified within 14 days of the detection of any significant changes in water level and / or deterioration in groundwater quality.

Table 8 Minimum Requirements for water monitoring under the Peat EA

Parameter Units Groundwater Monitoring Frequency*

Standing Water Level m bTOC** x Biannually / Annually

pH - x Biannually / Annually

Electrical Conductivity (EC) µS/cm x Biannually / Annually

SAR - x Biannually / Annually

Any other possible contaminants associated with petroleum activities

- x Biannually / Annually

*Monitoring frequency must not be less than biannually for the first year of production and annually thereafter.

**To the nearest millimetre.







http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-1000-PRO-PIP-015.doc


http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-Q8100-PLN-ENV-001.doc

http://upstreamportal/Applications/EPOMS/EPOMS/EPOMS/OEUP-Q1000-PLN-SAF-014.pdf




10. Document Information and History

PROCESS OWNER

Position Name

LNG Production Operations HSSE Manager Phil Egerton

DOCUMENT HISTORY

Rev Date Detailed Changes made in Document

Prepared Checked Approved

0 01/02/2011 Issued for use JMcC

A 22/10/2013 Updated Maps and Responsibilities KCB MJ Phil Egerton

1 10/01/2014 Issued for use Phil Egerton




Appendix A Regulated Dams and Groundwater Monitoring Locations




Appendix B Quality Data Control

B.1. Sampling Quality Assurance/Quality Control

As a minimum, the following QA/QC will be followed during the sampling program:

1. Sample containers, preservation and storage methods shall be selected prior to the sampling event in accordance with Appendix C8 of the EHP Monitoring and Sampling Manual 2009;

2. All sampling containers shall be new;

3. Preservation should be undertaken in situ wherever practicable;

4. Samples shall be stored and transported in an insulated container containing ice from the time of sampling until received at the laboratory;

5. Sampling equipment shall be constructed out of non-reactive sampling equipment;

6. Dedicated equipment will be used at all sites where contamination is known from previous investigations or suspected to exist. Where equipment is used on multiple sites (e.g. submersible pumps) this will be washed in Decon90 prior to being rinsed with deionised water. Equipment decontamination will be undertaken away from sampling sites. All decontaminated equipment will be air dried prior to reuse;

7. Field equipment will be calibrated prior to the monitoring round and at a minimum at the frequency specified by the equipment manufacturer during the monitoring round;

8. Miscellaneous QA/QC measures will include: samples will be handled using clean nitrile gloves; sunscreens containing zinc and propellant-based products (sunscreen/repellent) will not be used; laboratory prepared bottle stocks will be replenished as necessary; sample bottles, jars and plastic containers will be labelled after filling; and, vehicles will be parked away from sampling locations; and

9. Sample bottles will be overfilled (i.e. zero headspace) to diminish the potential for floating debris or air bubbles to collect in the sample. This minimises the potential for oxidation to occur. Overfilling will be minimised for sample containers containing sample preservatives. Sample containers with sample preservatives will be thoroughly mixed after filling by gently inverting the container several times.

An overview of the QA/QC sample strategy for the PGMP is presented in Table 9.

Table 9: Quality Assurance/Quality Control Sample Quantity and Frequency

QC Sample Type Purpose Frequency Notes

Trip Blank Monitor cross contamination during transport and storage

1 per esky Single sample of deionised water subjected to the same transport / storage conditions as other recovered samples. Trip blanks bottles will be filled with

deionised water by the laboratory and stored and transported in the same manner as other samples. The number of required blanks shall be requested from the laboratory prior to sampling;

All trip blanks will be blindly labelled: i.e. labelled non-existent site ID’s so the laboratory cannot identify as a QC sample; and

The trip blank shall be analysed for BTEX and C6-C9 TRH only.




QC Sample Type Purpose Frequency Notes

Equipment rinsate blank

Monitor cross contamination due to re-use of sampling equipment between sites

Collected at the beginning of each day and at least 1 sample in every 20 thereafter.

Single sample collected by rinsing sampling equipment with deionised water, after decontamination. Rinsate from all common use field

equipment (bailer, pump etc.) will be sampled; and

All rinsate blank samples will be blindly labelled and analysed for all analytes applicable to the work.

Duplicates Monitor cross contamination due to re-use of sampling equipment between sites and other sources of introduced contamination.

1 per 10 samples

Two samples collected concurrently from a single location and submitted for separate analysis (same parameters) to one laboratory. Secondary samples for duplicates will be

collected immediately following collection of the primary sample; and

All duplicates will be blindly labelled. The secondary site ID used will also be dissimilar to the primary ID.

Triplicates Monitor reproducibility of intra-laboratory analyses

1 in 10 samples where results of assessment are in response to a potential regulatory issue

Where monitoring data is likely to be relied upon for a significant legal matter, at least 1 in every 10 samples shall be a triplicate and sent to a second independent NATA-accredited laboratory.

B.2. Equipment Maintenance

All instruments, equipment and measuring devices used for monitoring activities shall be calibrated, appropriately operated, decontaminated and maintained to ensure the integrity of all results is maintained.

A data collection system for calibration and other primary records is currently in development.

B.3. Chain of Custody

A chain of custody (COC) with a valid Purchase Order (PO) shall accompany all sample batches sent to the laboratory. The COC shall include:

• Preservative methods applied to each sample;

• Any field filtering applied;

• Required analysis for each sample;

• Sample names, date, time;

• Samplers name and contact details;




• Monitoring program name;

• Sample type (freshwater versus high EC);

• Whether the samples have been chilled; and

• Any specific reporting requirements.

B.4. Laboratory Analysis

All analyses and tests shall be carried out by a laboratory that has registration with a National/International technical registration body such as the National Association of Testing Authorities (NATA) for the parameters identified in surface water are summarised in Table 6 and Table 7.

Groundwater parameters are to be monitored biannually at a minimum, with the exception of standing water level, which is to be monitored quarterly at a minimum.

Table 6 and Table 7.

Additionally, laboratories appointed shall maintain a Quality Assurance System equivalent to ISO9001.

Each laboratory engaged under this program shall ensure the following quality control practices are employed as a minimum:

1. A method or analysis blank: a laboratory sample prepared that contains no analyte. A method blank shall run for each analysis batch;

2. A duplicate sample: a duplicate analysis of an Origin Energy sample, including extraction. The laboratory prepares the sample by splitting an Origin Energy Sample at the time of sub-sampling and prior to extraction. One duplicate sample for each analyte shall be undertaken once every 20 samples or part thereafter. The relative percentage difference of the samples should be between 70 to 130%. If outside of this range, the laboratory must flag this result and comment on likely reasons for this;

3. A laboratory Control Sample: is a reference sample either prepared by the laboratory or purchased from an external source, which contains a known amount of an analyte. One laboratory control sample shall be run for each analyte every 20 Origin Energy Samples and part thereafter. The percentage recovery should be between 70-130%, with any result outside of this flagged and likely cause explained; and

4. A Matrix Spike (MS) and Matrix Spike Duplicate (MSD). A MS and MSD are laboratory prepared samples which contains a known amount of an analyte added to an Origin Energy sample. One MS and MSD shall be undertaken for selected surrogates (laboratory to advise) every 20 Origin Energy samples. The recovery values should be between 70- 130%, with any values outside of this flagged and likely causes explained.

Where a test result of ‘no result’ or ‘laboratory error’ are recorded, a supplementary sample shall be collected, where possible prior to the next regulatory scheduled test. The supplementary sample shall be conducted and tested as soon as possible after notification of the original test result.




Appendix C Trigger Value Exceedance

C.1. Determining UCL and LCL

The calculation of LCL and UCL requires 3 years of data, and is performed as follows:

1. Calculate the mean - sum of all values, divided by total number of values:

Where = sample mean;

= number of samples; and

= the individual numbers in the data set ( , ,...., ).

2. Calculate standard deviation of the mean:

Where = sample standard deviation;

= total number of samples;

= individual numbers in the data set ( , ,...., ); and

= sample mean.

3. Calculate LCL and UCL

Where = standard deviation

C.2. Determining a Trigger Value Exceedance

A trigger value exceedance shall be determined, when one of the following rules has been broken.

1. One data point outside the – or limit;

2. Two of three consecutive data points outside the – or limit;

3. Four of five consecutive data points outside the – or limit; and

4. Eight consecutive data points either above or below the mean.

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