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KIRKALOCKA GOLD MINE PROJECT WASTEWATER TREATMENT PLANT

LICENCE APPLICATION SUPPORTING DOCUMENT

14 November 2018 PREPARED FOR ADAMAN RESOURCES PTY LTD

BY PRESTON CONSULTING PTY LTD

WWTP LICENCE APPLICATION SUPPORTING DOCUMENT Kirkalocka Gold Mine

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Proponent contact details:

ADAMAN RESOURCES Contact Person: Laurie Chew – Project Development Manager Email: [email protected] Phone: +61 8 6216 9900 Address: Level 3/140 St Georges Terrace, Perth, Western Australia, 6000 Document developed by:

PRESTON CONSULTING Phil Scott (Director) Email: [email protected] Website: www.prestonconsulting.com.au Phone: +61 8 9221 0011 Fax: +61 8 9221 4783 Street Address: Level 3, 201 Adelaide Terrace, East Perth, Western Australia, 6004 Postal Address: PO Box 3093, East Perth, Western Australia, 6892 Disclaimer This Report has been prepared on behalf of and for the exclusive use of Adaman Resources Pty Ltd and is subject to and issued in accordance with the agreement between Preston Consulting Pty Ltd and Adaman Resources Pty Ltd. Preston Consulting Pty Ltd accepts no liability or responsibility whatsoever for or in respect of any use of or reliance upon this Report by any third party.

mailto:[email protected]

mailto:[email protected]

http://www.prestonconsulting.com.au/


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CONTENTS CONTENTS ......................................................................................................................................................... III

LIST OF FIGURES ............................................................................................................................................. III

LIST OF TABLES .............................................................................................................................................. IV

ATTACHMENT 1A: PROOF OF OCCUPIER STATUS ................................................................................ 1

ATTACHMENT 1B: ASIC COMPANY EXTRACT ........................................................................................ 2

ATTACHMENT 1C: AUTHORISATION TO ACT AS REPRESENTATIVE OF THE OCCUPIER ........ 3

ATTACHMENT 2: MAP OF PRESCRIBED PREMISES .............................................................................. 4

ATTACHMENT 3: PROPOSED ACTIVITIES ................................................................................................ 8

3A.1 - Project Overview ...................................................................................................................................................... 8

3A.2 - Scope of Proposed Activities ............................................................................................................................... 8

3A.3 - Process Overview ...................................................................................................................................................... 9

3A.4 – Operational Monitoring ..................................................................................................................................... 14

ATTACHMENT 5A: OTHER APPROVALS AND CONSULTATION ..................................................... 16

5A.1 Other Approvals ......................................................................................................................................................... 16

5A.2 Stakeholder Consultation...................................................................................................................................... 16

Government Stakeholders ................................................................................................................................................ 17

Corporate and Community Stakeholders .................................................................................................................. 17

ATTACHMENT 6A: EMISSIONS AND DISCHARGES ............................................................................. 18

ATTACHMENT 7: SITING AND LOCATION ............................................................................................. 20

7.1 Distance to Nearest Sensitive Land Uses .......................................................................................................... 20

7.2 Distance to Specified Ecosystems ......................................................................................................................... 20

ATTACHMENT 8: PROPOSED FEE CALCULATION .............................................................................. 21

8.1 Proposed Fee for Licence .......................................................................................................................................... 21

LIST OF FIGURES Figure 1: Regional Location of Prescribed Premises with Tenure ................................................................ 5 Figure 2: Location of Prescribed Premises Boundary ........................................................................................ 6 Figure 3: General arrangement drawing for camp and WWTP ...................................................................... 7 Figure 4: Cross-section of WWTP ................................................................................................................................ 9 Figure 5: Solids Tank ........................................................................................................................................................ 9 Figure 6: Aerobic Settling Pond 1 ............................................................................................................................. 10 Figure 7: Aerobic Settling Pond 2 ............................................................................................................................. 10 Figure 8: Infiltration area ............................................................................................................................................ 11 Figure 9: WWTP Process Flow Chart ...................................................................................................................... 13


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LIST OF TABLES Table 1: Relevant Prescribed Premises category and predicted throughput ........................................... 8 Table 2: Design parameters ........................................................................................................................................ 12 Table 3: Expected quality of incoming wastewater .......................................................................................... 12 Table 4: Potential emissions and discharges from commissioning and operation of the Prescribed Premises ...................................................................................................................................................... 18 Table 5: Anticipated wastewater quality outputs ............................................................................................. 21


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ATTACHMENT 1A: PROOF OF OCCUPIER STATUS Please see the following page for a copy of the Mining Tenement Summary Report for Mining Lease M59/234, retrieved from the Department of Mines, Industry Regulation and Safety – Mineral Titles Online (eMiTS).

Created 21/09/2018 14:52:16 Requested By: Lisa Wynne/Page 1 of 2

MINING TENEMENT SUMMARY REPORT

MINING LEASE 59/234 Status: Live

TENEMENT SUMMARY

Area: 995.70000 HA Death Reason :

Mark Out : 01/05/1991 10:20:00 Death Date :

Received : 01/05/1991 13:10:00 Commence : 04/11/1991

Term Granted : 21 Years (Renewed) Expiry : 03/11/2033

CURRENT HOLDER DETAILS

Name and AddressMINJAR GOLD PTY LTDKIRKALOCKA GOLD SPV PTY LTD, C/- MCMAHON MINING TITLE SERVICES PTY LTD, PO BOX 592,MAYLANDS, WA, 6931, [email protected], xxxxxxxxxxx997

DESCRIPTION

Locality: KIRKALOCKADatum: DATUM SITUATED 16.95KM BRG 346D33M FROM

TRIG STATION K44Boundary: THENCE: 3800 metres bearing 170 degrees 30 minutes

2600 metres bearing 260 degres 30 minutes to a point onthe western boundary of E59/201 3800 metres bearing350 degrees 30 minutes along the western boundary ofE59/201 2600 metres bearing 80 degrees 30 minutesBACK TO DATUM Replacing part of Exploration Licence59/201 pursuant to section 67(2) of the Mining Act1978-87

Area : Type Dealing No Start Date AreaSurveyed 28/03/1996 995.70000 HAGranted 04/11/1991 988.00000 HAApplied For 01/05/1991 988.00000 HA

SHIRE DETAILS

Shire Shire No Start End AreaMOUNT MAGNET SHIRE 5810 01/05/1991 911.30000 HAYALGOO SHIRE 9590 01/05/1991 84.40000 HA

RENT STATUS

Due For Year End 03/11/2018: PAID IN FULLDue For Year End 03/11/2019: $18,625.20

Mining Tenement Summary Report MINING LEASE 59/234 - Live

Created 21/09/2018 14:52:16 Requested By: Lisa Wynne/Page 2 of 2

EXPENDITURE STATUS

Expended Year End 03/11/2017: EXPENDED IN FULLCurrent Year Commitment : $99,600.00


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ATTACHMENT 1B: ASIC COMPANY EXTRACT

Australian Company

ADAMAN RESOURCES PTY LTDACN 620 314 007

25/09/2018 AEST 12:07:45 1

Extracted from ASIC's database at AEST 12:07:45 on 25/09/2018

Company Summary

Name: ADAMAN RESOURCES PTY LTD

ACN: 620 314 007

ABN: 26 620 314 007

Registration Date: 07/07/2017

Next Review Date: 07/07/2019

Status: Registered

Type: Australian Proprietary Company, Limited By Shares

Locality of Registered Office: PERTH WA 6000

Regulator: Australian Securities & Investments Commission

Further information relating to this organisation may be purchased from ASIC.


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ATTACHMENT 1C: AUTHORISATION TO ACT AS REPRESENTATIVE OF THE OCCUPIER

ADAMAN Resources Pty Ltd – ABN 26 620 314 007 AMP Building, Level 3, 140 St Georges Tce, Perth, WA 6000

PO Box 7515, Cloisters Square PO WA 6850

03 October, 2018 Department of Water and Environmental Regulation Locked Bag 33, Cloisters Square Perth WA 6000 To whom it may concern Authorisation to Act as Representative of the Occupier Kirkalocka Gold Project – Leases M59/232, M59/233, M59/234, L59/127 and E59/1775 Adaman Resources Pty Ltd (Adaman) authorises Preston Consulting Pty Ltd to act on Adaman’s behalf as their authorised agent/representative and to liaise directly with the Department of Water and Environmental Regulation in the preparation of environmental approvals documentation for the Kirkalocka Gold Mine (Mining tenements M59/232, M59/233, M59/234, L59/127 and E59/1775)”. Yours faithfully,

Laurie Chew Project Development Manager Adaman Resources


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ATTACHMENT 2: MAP OF PRESCRIBED PREMISES Please see attached Figure 1 which provides the regional location of the prescribed premises.

Figure 2 shows the location of the wastewater treatment plant (WWTP) within the prescribed premises boundary.

Figure 3 shows the general arrangement layout of the WWTP.


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Figure 1: Regional Location of Prescribed Premises with Tenure


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Figure 2: Location of Prescribed Premises Boundary


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Figure 3: General arrangement drawing for camp and WWTP


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ATTACHMENT 3: PROPOSED ACTIVITIES

3A.1 - PROJECT OVERVIEW Adaman Resources Pty Ltd (Adaman) propose to recommence mining operations at the Kirkalocka Gold Project (the Project) located approximately 500 km northeast of Perth and 70 km south of Mount Magnet . The Project is an existing mine site that was operated by Equigold NL (Equigold) between 2002 and 2008. The site has been in care and maintenance since 2008. Adaman has acquired the key mining tenements of M59/232, M59/233, M59/234 and L59/127 from Minjar Gold Pty Ltd.

The Project has an existing approval under the Mining Act 1978 for expansion of the mine and recommencement of mining and processing of gold ore. The approved Mining Proposal (Reg ID 37823) represents the primary environmental approval as the Project did not require referral or assessment under the Environmental Protection Act 1986 (EP Act) or Commonwealth Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act). Adaman plan to commence site plant refurbishment operations in November 2018 with the target of mining and treating gold ore on site by July 2019. The life of the Project is expected to be six years.

Environmental regulation under Part V of the EP Act will apply to the Project for discharges of wastes or emissions to the environment. This Licence application supporting document has been prepared to operate an existing wastewater treatment plant (WWTP), as it is classified as a Prescribed Premise under Schedule 1 of the Environmental Protection Regulations 1987 (EP Regulations). Table 1 provides a summary of the Prescribed Premises of the Project and the predicted throughput and production/ design capacity.

The objective of this document is to support the Licence application for Adaman to refurbish and operate the items listed in Table 1.

Table 1: Relevant Prescribed Premises category and predicted throughput

Category Description Category threshold

Production or design capacity

Predicted throughput

85 Sewage facility: premises – (a) On which sewage is treated

(excluding septic tanks); or (b) From which treated sewage

is discharged onto land or waters.

More than 20 but less than 100 cubic metres per day

50 cubic metres per day

40 cubic metres per day

3A.2 - SCOPE OF PROPOSED ACTIVITIES The existing WWTP will be classified as a Prescribed Premises under Category 85 (Sewage Facility) of Schedule 1 of the Environmental Protection Regulations 1987.


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3A.3 - PROCESS OVERVIEW The components of the existing WWTP included in this application are shown in Figures 3, 4, 5, 6, 7 and 8, and listed below:

• Three underground tanks with grinder pumps located within the camp; • A solids tank on the northern edge of the wastewater treatment ponds; • Two aerobic settling ponds, and • A fenced infiltration area.

Figure 4: Cross-section of WWTP

Figure 5: Solids Tank


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Figure 6: Aerobic Settling Pond 1

Figure 7: Aerobic Settling Pond 2


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Figure 8: Infiltration area

A process flow chart for the existing WWTP is shown in Figure 9and the key treatment steps are described below:

1. Wastewater from the kitchen and the accommodation units flows into three underground tanks located within the camp, where the wastewater and sludge is broken down by grinder pumps.

2. Once broken down, the wastewater is pumped to a solids tank on the northern edge of the wastewater treatment ponds.

3. The wastewater is then released into the first aerobic settling pond, where the organic material is reduced by a combination of aerobic and anaerobic bacteria. A population of anaerobic organisms will colonize accumulated sludge on the bottom of the pond. The surface area of the pond is large enough to provide an atmospheric oxygen transfer rate adequate to prevent anaerobic conditions on the pond surface. Intermediate depths of the pond support facultative micro-organisms capable of oxidizing both the dissolved and suspended organics from the original wastewater and the products of anaerobic catabolism on the bottom of the pond.

4. The wastewater at the surface overflows into the second aerobic settling pond where the organic material is further reduced by more aerobic bacteria. This pond supports lower

https://en.wikipedia.org/wiki/Anaerobic_organism

https://en.wikipedia.org/wiki/Oxygen

https://en.wikipedia.org/wiki/Catabolism


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populations of anaerobic micro-organisms and a higher proportion of aerobic organisms adapted to survival in lower concentrations of organic material.

5. The wastewater in the second aerobic pond is then released into the fenced infiltration area where it both evaporates and seeps into the ground.

Design Parameters

The WWTP has been designed to cater for the specifications outlined in Table 2.

Table 2: Design parameters

Design Parameters Design capacity Expected throughput

Population 143 114

Hydraulic Loading 350 L/EP/day 350 L/EP/day

Daily Flow 50 m3/day 40 m3/day

Peak Flow / Feed Flow Approximately 17 m3/hour Approximately 14 m3/hour

In determining wastewater generation volumes, a conservative figure of 350 L/day of wastewater production has been assumed for each person within the Kirkalocka Camp. While the potential capacity of the WWTP is 50 m3/day, it is expected that the throughput will not exceed 40 m3/day given the proposed capacity of the accommodation camp.

The WWTP has been designed on basis of the expected quality of the input wastewater outlined in Table 3.

Table 3: Expected quality of incoming wastewater

Input Volume

Biological Oxygen Demand (BOD) 300 - 450 mg/L

Total Nitrogen (TN) 60 - 80 mg/L

Total Phosphorus (TP) 15 – 25 mg/L

Total Suspended Solids (TSS) 300 - 450 mg/L


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Figure 9: WWTP Process Flow Chart


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Housekeeping

Accommodation camp residents will be provided with information to assist in minimising the generation of wastewater and in preventing the contamination of the wastewater through the disposal of inappropriate materials. Water saving devices such as dual-flush toilets, water-saving showerheads and low water-use washing machines and dishwashers will be installed if available.

Power Supply

Electrical power for the Project will be supplied by a power station consisting of 3 x 3.36MW gas generators providing the main power supply and 2 x 2.34MW diesel generators for back-up power.

It is estimated that 35.6 Gigawatt hours (GWhrs) of power will be consumed per annum through operation of the Project.

Water Supply

The camp receives water from a bore supply located 150m west of the camp. A portion of this water is treated by reverse osmosis (RO) and remainder is stored in the raw water tank. The treated RO water is used in the kitchen and in drinking water taps, strategically positioned around the camp. The raw water is connected to the accommodation showers, basins, toilets and non-drinking taps located around the camp.

3A.4 – OPERATIONAL MONITORING Once the WWTP is operating, monitoring will be conducted to meet DoH and Part V licensing requirements. The previous WWTP Licence (L7814/2002/5) imposed the following conditions on wastewater samples and Adaman intends to reinstate this monitoring program:

W 14: Samples of treated wastewater discharged from the final aerobic pond (prior to discharge to the infiltration area) will be collected every three months. The samples will be collected at a time when it can be assumed that the treated wastewater is representative of steady state discharge conditions and shall be analysed to determine the levels of the following parameters:

I) pH;

II) Total Suspended Soilds;

III) Total Dissolved Solids;

IV) 5-Day Biochemical Oxygen Demand;

V) Total Nitrogen;

VI) Total Phosphorous; and

VII) Thermotolerant coliforms.

VIII) With the exception of pH and Thermotolerant coliforms, all measurements are to be reported in mg/L. The results shall be presented in the next annual monitoring report.


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W15 (b) The Licensee shall collect all water and wastewater samples in accordance with the relevant part of Australian Standard 5667.

W15 (c) The Licensee shall submit all water samples to a laboratory with current NATA accreditation for the specified parameters, and analysed in accordance with the current “Standard Methods for Examination of Water and Wastewater-APHA-AWWA-WEF” unless an alternative laboratory or method is approved by the Director.


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ATTACHMENT 5A: OTHER APPROVALS AND CONSULTATION

5A.1 OTHER APPROVALS Part IV EP Act

The approved Mining Proposal (Reg ID 37823) represents the primary environmental approval as the Project did not require referral or assessment under the Environmental Protection Act 1986 or EPBC Act.

Part V EP Act

A Works Approval will be submitted for the construction of a SAG Mill and a lift of the existing Tailing Storage Facility.

Mining Act 1978

The KGP site was previously approved by the Department of Mines, Industry Regulation and Safety (DMIRS) for operation in accordance with the Equigold Kirkalocka Notice of Intent (NOI) dated December 2001 and the Equigold Supplementary NOI for the Tailing Storage Facility and Borefields dated April 2002. Equigold closed the operation in 2008 and placed the treatment plant on care and maintenance.

A Project Management Plan (PMP) has been submitted to DMIRS. No refurbishment works will commence until the PMP has been approved.

A Mining Proposal for the Project when owned by Mount Magnet South NL was submitted to DMIRS on 7 March 2013 and approved (Reg ID: 37823).

Minjar Gold purchased the project in late 2015, with tenements and associated approvals transferred from Mount Magnet South NL to Minjar.

A Mine Closure Plan for the Project under care and maintenance with Minjar Gold was submitted to DMIRS on 1 September 2017.

Adaman has since acquired the key mining tenements of M59/232, M59/233, M59/234 and L59/127 from Minjar Gold Pty Ltd.

Health Act 1911.

Adaman will apply for approval for a Permit to Use an Apparatus for the Treatment of Sewage from the Department of Health for operation of the WWTP and on-site disposal of wastewater.

5A.2 STAKEHOLDER CONSULTATION Adaman Resources has identified key external stakeholders and determined how they will be impacted by the Project. The aim of this consultation is to develop productive relationships that ensure the Project is underwritten by sustainable agreements and the necessary statutory


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approvals. As part of this consultation, Project components such as the WWTP have also been discussed with the stakeholders below.

GOVERNMENT STAKEHOLDERS Commonwealth, State and Local Government authorities have been briefed on the Project to ensure any issues, concerns or suggestions are identified and, where appropriate, addressed or responded to by Adaman Resources.

The following regulatory departments and authorities have been or will be consulted with regards to the continued use of the WWTP:

• Department of Health; • Shire of Mount Magnet; • DWER, and • DMIRS.

CORPORATE AND COMMUNITY STAKEHOLDERS Adaman Resources’ stakeholder consultation strategy also recognises that individuals, companies and communities are interested in any potential impacts the Project may have on them and can influence the approvals, licences and agreements for the Project. Adaman Resources has contacted or will meet with the following stakeholders to inform them of the Project and the continued use of the WWTP and discuss any opportunities or concerns that the stakeholders would like to raise and resolve:

• Minjar Gold; and • Kirkalocka Station.

.


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ATTACHMENT 6A: EMISSIONS AND DISCHARGES Table 4 details all potential emissions and discharges from these Prescribed Premises. Table 4: Potential emissions and discharges from commissioning and operation of the Prescribed Premises

Source of emission or

discharge

Emission or discharge

type

Volume and frequency

Proposed Controls

Commissioning and Operation

Treatment ponds Overflow during extreme rainfall events

Overflow would only occur if pond 2 was to fill to capacity

Management: • Maintain site drainage such that

uncontaminated stormwater does not enter the treatment ponds

• Ensure installed overflow mechanisms are in good working order (i.e. between pond 1 and 2, and pond 2 and the infiltration area)

Monitoring: • Wastewater samples to be collected every

three months from the final anaerobic pond prior to discharge to the infiltration area.

• All wastewater samples will be collected in accordance with AS/NZS 5667.10

• Samples will be submitted to a laboratory with current NATA accreditation for the parameters to be monitored

• Verification and validation monitoring will be conducted in accordance with DoH requirements during commissioning

• Operational monitoring will be conducted in accordance with the program detailed in Section 3A.3

Discharge of wastewater to dedicated fenced infiltration area

Treated wastewater

Approximately 40 m3/day

Management: • Discharge will not occur beyond the boundary

of the fenced infiltration area • Disposal of treated wastewater will occur as

per DoH approval under the Health Act 1911 • Appropriate fencing and signage has been

installed at the infiltration area as per DoH requirements

Monitoring: • Wastewater samples to be collected every

three months from the final aerobic pond prior to discharge to the infiltration area. The sample will be collected at a time when it can be assumed that the treated wastewater is representative of steady state discharge conditions

• All wastewater samples will be collected in accordance with AS/NZS 5667.10

• Samples will be submitted to a laboratory with current NATA accreditation for the parameters to be monitored

• Verification and validation monitoring will be conducted in accordance with DoH requirements during commissioning

• Operational monitoring will be conducted in accordance with the program detailed in Section 3A.3


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Source of emission or

discharge

Emission or discharge

type

Volume and frequency

Proposed Controls

Leaks or spills of wastewater or sludge/biosolids from tanks or pipelines during operation

Untreated wastewater (raw sewage) and biosolids

Unintentional discharge.

Management: • All wastewater storage components of the

WWTP will be impermeable (i.e. fibreglass, concrete or lined with HDPE)

• Any incident involving a spill of untreated sewage will be responded to immediately with contaminated soil removed and taken by a licensed transporter to a licensed facility. Remediation actions will be taken to minimise the risk of reoccurrence

Monitoring: • All pipelines and tanks will be inspected on a

regular basis for leaks or damage • The WWTP (inclusive of tanks, pipelines and

treatment ponds) is to be inspected for cracks or leaks prior to filling with water

• Fresh water will be used for the initial flush of the system and all components will again be inspected to ensure there are no leaks

Wastewater tanks and settling ponds

Odour Exact odour emissions are unable to be quantified however they are not expected to be excessive given the relatively small scale of the WWTP.

Management: • The WWTP has been located away from the

accommodation camp and is in a remote location (13 km from the nearest sensitive receptor)

Monitoring: • Wastewater is to be sampled and tested every

3 months to ensure the treatment process is in good working order

• Odour complaints will be investigated to determine potential causes and remediation actions

Pumps and maceration stations

Noise Exact noise emissions are unable to be quantified however they are not expected to be excessive given that the maceration process occurs underground, and the WWTP is in a remote location. Noise is unlikely to impact receptors as the nearest receptor is 13 km away (Kirkalocka Station).

Management: • Low-noise equipment will be used where

practicable to minimise noise • Adaman is aware of its obligations under the

Environmental Protection (Noise Regulations) 1997, and will ensure the WWTP complies with these regulations at all times.

Monitoring: • Noise complaints will be investigated to

determine potential causes and remediation actions


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ATTACHMENT 7: SITING AND LOCATION

7.1 DISTANCE TO NEAREST SENSITIVE LAND USES The premises lies within a remote area and as such there are no sensitive receptors located in the surrounding area. The closest is the Kirkalocka Station, which is approximately 13 km north-east of the premises (Figure 1). The township of Mount Magnet is located 70 km north of the premises.

7.2 DISTANCE TO SPECIFIED ECOSYSTEMS Specified ecosystems are described in The Environmental Siting Guidance Statement (Department of Environment Regulation, 2016) as areas of high conservation value and special significance that may be impacted as a result of activities at or Emissions and Discharges from prescribed premises.

The closest Specified Ecosystem to the premises is Wagga Wagga Salt Lake, a Department of Environment Important Wetland, which is located approximately 62 km north-north-west of the premises.


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ATTACHMENT 8: PROPOSED FEE CALCULATION

8.1 PROPOSED FEE FOR LICENCE The licence fee was calculated by combining the 24 fee units for Category 85 premises, and the anticipated wastewater discharges summarised in Table 5. The discharge calculations were based on a conservative assumption is that 70% of Biological Oxygen Demand, Total Nitrogen, Total Phosphorus and Total Suspended Solids will be removed through the aerobic ponds prior to discharge to the infiltration area.

The anticipated license fee is calculated to be $1,491.28

Table 5: Anticipated wastewater quality outputs

Output Concentration Amount (assuming maximum 50,000 L/day)

Biological Oxygen Demand 135 mg/L 6.7 kg/day

Total Nitrogen 24 mg/L 1.2 kg/day

Total Phosphorus 7.5 mg/L 0.4 kg/day

Total Suspended Solids 135 mg/L 6.7 kg/day

E. Coli Bacteria <1000 organisms per 100 mL 0.05 ML/day

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