Havieron Exploration Project JBS&G Australia Pty Ltd T/A ......©JBS&G Australia Pty Ltd T/A...

Newcrest Mining Limited

Works Approval Application Category 85 – Sewage Facility

Havieron Exploration Project

12 August 2020

58994 Revision 0

JBS&G Australia Pty Ltd T/A Strategen-JBS&G

©JBS&G Australia Pty Ltd T/A Strategen-JBS&G | 58994 Revision 0 ii

Table of Contents

1. Introduction ................................................................................................................... 1

1.1 Background .......................................................................................................... 1

1.2 Purpose and Scope .............................................................................................. 1

1.3 Checklists ............................................................................................................. 1

1.4 Regulatory Framework ........................................................................................ 2

1.4.1 Part IV of the EP Act ............................................................................. 2

1.4.2 Clearing Regulations ............................................................................ 2

1.4.3 Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act)............................................................................................. 2

1.4.4 Mining Act ............................................................................................ 2

1.4.5 Health Regulations ............................................................................... 2

2. Applicant Details ............................................................................................................ 3

3. Premises Details ............................................................................................................. 4

4. Attachment 3B: Proposed Activities .............................................................................. 7

4.1 Introduction ......................................................................................................... 7

4.2 Sewage pump station .......................................................................................... 7

4.3 Sequencing Batch Reactor ................................................................................... 7

4.3.1 Inlet ...................................................................................................... 8

4.3.2 SBR Tank ............................................................................................... 8

4.3.3 Treated Effluent Storage Tank ............................................................. 9

4.3.4 Sludge Tank .......................................................................................... 9

4.3.5 PACL Dosing System ............................................................................. 9

4.3.6 Treated Water Disinfection .................................................................. 9

4.4 Irrigation Field Specifications. ........................................................................... 10

4.5 Monitoring ......................................................................................................... 11

4.5.1 Threshold limits .................................................................................. 11

4.5.2 Monitoring frequency ........................................................................ 12

5. Attachment 6A: Emissions and Discharges .................................................................. 14

6. Attachment 7: Siting and Location .............................................................................. 15

6.1 Climate ............................................................................................................... 15

6.2 Geology .............................................................................................................. 15

6.3 Hydrology and hydrogeology ............................................................................ 15

6.4 Flora ................................................................................................................... 16

6.5 Fauna ................................................................................................................. 17

6.5.1 Vertebrate fauna ................................................................................ 17

6.6 Sensitive Receptors ........................................................................................... 18

©JBS&G Australia Pty Ltd T/A Strategen-JBS&G | 58994 Revision 0 iii

6.7 Contaminated Sites ........................................................................................... 18

7. Attachment 9: Proposed fee calculation ..................................................................... 19

List of Tables Table 1.1: Prescribed Premises Categories .............................................................................. 1

Table 1.2: DWER Works Approval Form .................................................................................. 1

Table 4.1: Threshold limits ..................................................................................................... 11

Table 4.2: Proposed Maintenance Schedule ......................................................................... 12

Table 5.1: Emissions and discharges ...................................................................................... 14

Table 6.1: Conservation significant fauna species ................................................................. 17

Table 7.1: Cost of works ......................................................................................................... 19

List of Figures Figure 3.1: Site Location Map .................................................................................................. 5

Figure 3.2: Clearing Area .......................................................................................................... 6

Figure 4.1: WWTP Layout....................................................................................................... 10

Figure 4.2: Irrigation Field Layout .......................................................................................... 11

Figure 6.1: Rainfall and temperature data for Telfer Aero weather station (43km East of project area) for 2019 and January to February 2020. (Station ID 012030)... 15

Attachments Attachment 1A: Proof of Occupier Status

Attachment 1B: Current Company Extract

©JBS&G Australia Pty Ltd T/A Strategen-JBS&G | 58994 Revision 0 2

1.4 Regulatory Framework

1.4.1 Part IV of the EP Act

The project is not considered as a significant proposal and does not require referral under Part IV of the EP Act. Consultation with the Environmental Protection Authority Services of DWER has occurred.

1.4.2 Clearing Regulations

A Native Vegetation Clearing Permit will not be required. Clearing for the sewage facility will be carried out under the exemption outlined in Regulation 5, Item 25 of Environmental Protection (Clearing of Native Vegetation) Regulations 2004 (Clearing Regulations) as clearing carried out under the Mining Act 1978 (Mining Act).

1.4.3 Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act)

The project is not expected to significantly impact any Matters of National Environmental Significance (MNES) and therefore referral under the EPBC Act is not required.

1.4.4 Mining Act

Various Programmes of Works (PoW) are currently in place under the Mining Act to allow for exploration activities to occur at the project. An additional POW (POW 88832)has been submitted to the Department of Mines, Industry Regulation and Safety to include the proposed sewage facility.

1.4.5 Health Regulations

An application for a permit to construct or install an apparatus for the treatment of sewage under the Health (Treatment of sewage and disposal of effluent and liquid waste) Regulations 1974 (Health Regulations) for the proposed sewage facility will be submitted to the Shire of East Pilbara.


2. Applicant Details

The following documents are attached to this document to support this application.

• Attachment 1A: Proof of occupier status:

o Publicly available mining tenement report generated from Mineral Titles Online on 30 June 2020 confirming Newcrest Operations Limited and Greatland Pty Ltd as the current holders of Exploration Licence 45/4701 and M45/1287.

• Attachment 1B: ASIC Company Extract


4. Attachment 3B: Proposed Activities

4.1 Introduction

The sewage facility will be used to service the Havieron camp, with a maximum accommodation capacity of 220 people. Effluent from the camp will be directed to the WWTP, whereby following treatment, the effluent will be discharged to a 4 ha irrigation field. Waste water treatment will comprise of three stages:

• Sewage Pump Station

• Sequencing Batch Reactor (SBR) treatment plant

• Irrigation field

4.2 Sewage pump station

A sewage pump station will pump waste water into the SBR inlet. The pump station will be placed next to the WWTP and will comprise of the following:

• Prefabricated Poly sewage pump station

• Class B gatic covers

• IP 65 rated control panel

• Duty/standby Grundfos macerator sewage pumps

• Incorporated valve chamber

• Galvanised control panel mounting post

• Visual and audible pump failure alarm

• Stainless steel lifting chains

• Stainless steel guide rails

• Auto couplings

• 3 x float switches

• All required valves, pipes and fittings

4.3 Sequencing Batch Reactor

The SBR has the capacity to process waste water throughput of 75 kL/day, which equates to a capacity of approximately 300 people. The SBR system is a two train 12 m containerised arrangement. Sewage from the pumping station first undergoes a screening process through a mechanical screen where in-organics are removed prior to entering the equalisation tanker. The equalisation tank is used to regulate the inflow of the influent and provides a steady flow into the SBR tank. The biological treatment process being Oxidation, Nitrification, De-nitrification, Sedimentation and Aerobic sludge digestion takes place in the SBR tank.

After the clarification process in the SBR tank the clear liquor from the top of the tank is decanted via a decant pump to the treated effluent storage tank. Prior to entering the treated effluent storage tank the effluent is disinfected and this could be via the use of Ultra Violet radiation or dosing with sodium hypochlorite. The choice and system requirements for disinfection are designed to meet client requirements and/or state guidelines. The treated effluent is stored in the treated effluent storage tank prior to discharge to the irrigation field. The WWTP is a sequence batch reactor system (SBR) and is designed to operate with minimal operator input.


The Wastewater Treatment Plant will be equipped with the following:

• Duty 2.5mm inlet bar screen.

• External two 50m3 Poly balance tank(s)

• Grundfos duty balance pump.

• SBR Tank with heavy duty submersible aerators and floating decant weir. Cyclic operation of the SBR tank: 4 x 6 hr cycles per day: 0.5hr feed/1.25hr anoxic period with mixing, 3.25hr aeration, 0.75hr settle and 0.75hr decant. SBR tank operating volume can be adjusted for lower inflows. Process sequence times are adjustable based on influent/effluent concentrations.

• Grundfos duty decant pump.

• Worm Drive duty sludge pump.

• Grundfos duty recirculation pump with online chlorine dosing.

• Grundfos sodium hypochlorite dosing system.

• Grundfos poly aluminium chloride dosing system.

• Grundfos Sucrose Dosing

• Two 32kl PE sludge storage tank

• Two 32kl PE Irrigation tank

• Return sump

• Irrigation pump

• Discharge flow meter

• Control panel (Australian Standard) with PLC and remote monitoring capabilities

• Audible and visual alarm

• Access ladder and high level platform to top of container

• Interconnecting pipes (90-110 mm)

Further details on the process are detailed below.

4.3.1 Inlet All raw sewage is pumped to the inlet works of the waste water treatment plant. A mechanical screen is installed to remove all the inorganic material from the sewage and dispose it to the waste bin.

4.3.2 SBR Tank The SBR tank operates is five modes; these being Fill, Aerobic, Anoxic, Settle and Decant. The SBR tank cycles through all modes of operation 4 times per day. A submersible aeration pump is installed in the centre of the SBR tank to provide oxygen to the tank’s contents. The aeration pump is provided with a variable speed drive which automatically ramps up or down based on the required oxygen level in the SBR tank. An ultrasonic level transmitter is fitted to the SBR tank to indicate tank volume, to stop decant pump and indicate an alarm at high level.

4.3.2.1 Aerobic mode During this period the aerator maintains a minimum oxygen level of 2mg/L. A dissolved oxygen sensor is located in the SBR tank to control the output of aeration pump based on the current oxygen level and operation mode.


The SBR tank is capable of providing complete biological nitrification and BOD removal of the wastewater. Nitrification is a two-step biological process in which ammonia (NH4-N) is oxidized to nitrite (NO2-N) and nitrite is oxidized to nitrate (NO3-N).

4.3.2.2 Anoxic mode

Following the aerobic mode, the system is automatically switched to the anoxic mode. The anoxic period is controlled to maintain anoxic conditions, that is ensuring that oxygen levels are at 0 mg/L. In the anoxic mode, the aeration pump is set to operate at 30% full speed to engage mixing of the tank contents without imparting any oxygen input into the tank. During the anoxic period, the system automatically initiates the second aerobic mode where the aeration pump starts to operate at a higher speed and thereby increasing oxygen supply.

4.3.2.3 Settle mode

After the second aerobic mode, the system switches to the settle mode to allow for all the solids in the tank to settle to the base. A clear liquor is left at the top. The pump is turned off during the settle mode.

4.3.2.4 Decant mode

Once the settle phase is completed, the decant mode is activated. The decant process draws the clear liquor from the surface of the tank and transfer it to the treated effluent storage tank. The decant pumps are configured in a duty/duty arrangement with the duty pump alternating at the end of each decant cycle. If the selected duty pump fails, the alternant pump takes over.

4.3.3 Treated Effluent Storage Tank

The treated effluent storage tanks are used to treat effluent before disposal and re-use. The effluent is treated with chlorine for 30 minutes before disposal to the irrigation area. The storage tank is fitted with an emergency overflow.

4.3.4 Sludge Tank Sludge is periodically wasted from the SBR tank to maintain the desired MLSS concentration. This wasting is auto controlled by the PLC based on the operator’s set point. Sludge wasted from the SBR tank is transferred to the sludge tank for digestion.

4.3.5 PACL Dosing System The removal of phosphorus involves the precipitation of phosphate into the suspended solids and then removal of these solids. Phosphorus can be incorporated into the biological solids or chemical precipitates and then removed from the system via WAS discharge to the sludge tank digester. Poly-Aluminium Chloride (PACL) dosing is used to precipitate phosphorus in the wastewater. PACL solution (42%) is drawn from its storage tank and dosed into the feed line between the equalisation and SBR tanks, where it mixes with the wastewater.

4.3.6 Treated Water Disinfection A sodium hypochlorite (chlorine) dosing system is installed to sterilize the treated effluent prior to disposal. Sodium hypochlorite is dosed at a pre-determined fixed rate set during commissioning into the decant discharge pipe prior to entering the irrigation tank. Alternatively, a UV disinfection system will be installed to sterilize the treated effluent prior to disposal. The required chlorine level of 0.5mg/L is to be maintained in the effluent storage tank at all times and testing will confirm compliance, whereby the operator may adjust the dosing pump output to match the desired chlorine residual. The chlorine is stored in a 100L PE tank fitted with low level float switch to alarm at a low level for operator filling.


Figure 4.1: WWTP Layout

4.4 Irrigation Field Specifications.

The Irrigation Field has a capacity to discharge an average wastewater of 75 kL/day. The spray irrigation system has been designed to suit a minimum of 21,429m² plus 5m spray drift buffer from the edge of the sprinkler. The sprayfield will comprise of the following:

• A 4 ha fenced area

• Above ground hammer type sprinklers. These sprinklers will be able to deliver a radius of 30 m each with 5mm nozzle reducing any element of clogging.

• 100 m of rising main from WWTP irrigation pump to dedicated spray irrigation area

• 1200 mm high 2 strand steel wire fencing

• 1 x vehicle access gates to spray area

• Steel corner posts strainers and intermediate solid mounted posts

• Safety signage every 50m of fencing

• Individual branch line flush valves

• Automated control from Tristar WWTP irrigation pump

• Signage and tagging


6. Attachment 7: Siting and Location

6.1 Climate

The Great Sandy Desert has a climate ranging from Tropical Arid in its southern to central parts to Tropical Semi-arid. The regional annual evaporation is approximately 3000 mm. Cyclones are a major source of rain, crossing the coast on average every 1-2 years, and bringing 200-400 mm of rainfall for a given cyclonic event (Bureau of Meteorology - BOM).

Telfer (Havieron Project Area) receives an average annual rainfall of 365 mm (data from 1974 – 2020 [Station 013030, BOM 2020]). The majority of the rain occurs in the summer months with February being the wettest month with an average of 102.7 mm (Figure 6.1).

Figure 6.1: Rainfall and temperature data for Telfer Aero weather station (43km East of project area) for 2019 and January to February 2020. (Station ID 012030)

6.2 Geology

The Great Sandy Desert region is underlain by a range of Precambrian, Mesozoic and Cainozoic materials. Precambrian rocks form outcrops in the southern part of the Great Sandy Desert region. Mesozoic sedimentary rocks form subcrops throughout the entire desert region, forming as ranges, local hills, mesas, buttes and exhumed rock pavements. A vast sheet of red aeolian sediment, late Cainozoic to Quaternary in age, forms the near-surface materials through the entire desert (JBSG 2020a).

Regionally, the Havieron Project Area is within the Paterson – Yeneena province (zone 152) (Tille 2006) which overlies the north-western Patterson Orogen and Yeneena Basin. The Yeneena Basin contains Mesoproterozoic and Neoproterozoic sandstone, shale and carbonate. Also included is a small portion of the Waukarlycarly Embayment (Canning Basin) which contains Phanerozoic sedimentary rocks (JBSG 2020a).

6.3 Hydrology and hydrogeology

The Great Sandy Desert region can be subdivided into five major hydrologic zones as described below (Syrinx 2013):

• the region to the south of the Salt Creek - Sandfire drainage line, comprising aeolian sand plains, buried channels systems, calcrete and gypsum at the water table, subcrops of Precambrian rock as bedrock aquifers, and proximity of the Pilbara region;


• the region along the Salt Creek - Sandfire drainage line, comprising, again, aeolian sand plains, but superimposed on a major buried channels system, with calcrete at the water table, and subcrops of Mesozoic rock;

• the region to the north of the Salt Creek - Sandfire drainage line, comprising aeolian sand plains, some buried channels systems, subcrop of Mesozoic rock as a regional aquifer;

• the region at the junction of the Great Sandy Desert and the Fitzroy River valley tract, comprising aeolian sand plains, extant rock-incised channels systems, outcrop and subcrop of Mesozoic rock as a regional aquifer;

• the region along the coast, comprising sandy and muddy coastal deposits, where there is local freshwater storage, and seepage induced by seaward discharge from regional aquifers interfacing with coastal muddy deposits.

The project is located within Zone 1, the region to the south of the Salt Creek - Sandfire drainage line:

• These salt-lake associated drainage lines were identified as being an important part of the ground water systems within the Great Sandy Desert.

• The salt lakes act as sumps to inflow of freshwater deriving from subsurface drainage during the wet season or the cyclone season, and later in the dry season, when the surface waters have been concentrated to saline by evaporation, act as recharge zones, delivering plumes of salt water to the surrounding aquifers (JBSG 2020a).

Havieron Bores HAVWB 01 and HAVWB 04 shows the following groundwater characteristics in the area:

• Static Water Levels (SWL) - 10-12 mbgl;

• Total Dissolved Solids – 2,120 to 13,500 mg/L;

• pH – 8.0

No beneficial groundwater users are within proximity to the Project. Whilst groundwater is abstracted for camp water supply, water treatment occurs and is a significant distance (1 km) from the irrigation area. The potential for contamination is considered low.

6.4 Flora

A vegetation survey conducted by Strategen JBS&G identified the likely presence of only one Priority 4 species, Goodenia nuda E.Pritz as listed under the Biodiversity Conservation Act 2016. Several other Priority taxa have been previously recorded within the greater area (Telfer Mine Site) and the potential for these plants to occur within the site was assessed based on general habitat and distribution. It was deduced that no Threatened species and four Priority flora were considered to have the potential to occur within the site.

The proposed development area constitutes of a highly degraded area and some bush vegetation and therefore it is highly unlikely that there is any protected flora species within the proposed disturbance footprint. No state or federally listed Threatened Ecological Communities (TECs) or Priority Ecological Community (PEC) under the State BC Act were identified by the database searches as potentially occurring in the area.


6.6 Sensitive Receptors

There are no residential areas within 10 km of the proposed development area and the closest mine site is Telfer owned by Newcrest which is located 45 km west.

The Karlamilyi National Park (R 34607) is located 26 km south east the proposed landfill and the irrigation area (see Figure 3.1). The park is protected under the Conservation and Land Management Act 1984 (CALM ACT) – Section 5(1)(c) and encompasses over 1.3 million ha between the Great Sandy Desert and the Little Sandy Desert. The area is characterised by desert dunes, spinifex grasslands, salt lakes and weathered plateaux and comprise of a central belt of stony hills and undulating plains. The National Park has important cultural significance for the Martu Aboriginal People. No impacts to the National Park are expected from the development of the project. No File Notation Areas (FNA), DBCA Purchased Land, Section 19 areas are found within a buffer of 10 km from the project.

Department of Biodiversity Conservation and Attractions (DBCA) datasets DBCA -010 and DBCA -045 do not indicate the presence of any Ramsar sites and Important Wetlands as listed in the Directory of Important Wetlands (the directory). Lake Dora (Rudall River) system, listed under the directory, is located 35 km southeast of the project. No impact on the wetland is expected to occur from the construction and operation of the proposed sewage facility. Department of Water and Environment Regulations (DWER) -031 -Hydrography Linear spatial dataset does not show any evidence of any major streamlines passing through the project area.

Landgate dataset LGATE-053 – Overview Rivers does not indicate the presence of any rivers within a 10 km buffer of the project.

6.7 Contaminated Sites

A search of the DWER contaminated sites database (DWER 2019) confirmed that the site is not recorded as contaminated under the Contaminated Sites Act 2003.


Attachment 1A: Proof of Occupier Status

Created 30/06/2020 14:38:04 Requested By: Aneesh Shameek Toolsee/Page 1 of 1

MINING TENEMENT SUMMARY REPORT

EXPLORATION LICENCE 45/4701 Status: Live

TENEMENT SUMMARY

Area: 43 BL Death Reason :

Mark Out : Death Date :

Received : 09/02/2016 08:53:54 Commence : 17/07/2017

Term Granted : 5 Years Expiry : 16/07/2022

CURRENT HOLDER DETAILS

Name and AddressGREATLAND PTY LTD

DESCRIPTION

Remaining Blocks

Type Start Date No. of Blocks GraticulesMillion Plan Primary Blocks

Granted 17/07/2017 43 OAKOVER RIVER 1398 stuyzOAKOVER RIVER 1399 qrvwOAKOVER RIVER 1471 abcdefghjkopOAKOVER RIVER 1472 abcfghlmnopqrstuxyzOAKOVER RIVER 1473 lqv

Applied For 09/02/2016 43 OAKOVER RIVER 1398 stuyzOAKOVER RIVER 1399 qrvwOAKOVER RIVER 1471 abcdefghjkopOAKOVER RIVER 1472 abcfghlmnopqrstuxyzOAKOVER RIVER 1473 lqv

Description of Land NOT included in the grant of the Licence.

SHIRE DETAILS

Shire Shire No Start End AreaEAST PILBARA SHIRE 3220 09/02/2016 43.00000 BL

RENT STATUS

Due For Year End 16/07/2020: PAID IN FULLDue For Year End 16/07/2021:

EXPENDITURE STATUS

Expended Year End 16/07/2019: EXPENDED IN FULLCurrent Year Commitment :

Created 12/08/2020 19:04:31 Requested By: Louise Whitley/Page 1 of 1

MINING TENEMENT SUMMARY REPORT

MINING LEASE 45/1287 Status: Pending

TENEMENT SUMMARY

Area: 3,816.00000 HA Death Reason :

Mark Out : 01/08/2020 08:00:00 Death Date :

Received : 03/08/2020 08:30:00 Commence :

Term Granted : Expiry :

CURRENT HOLDER DETAILS

Name and AddressGREATLAND PTY LTD

DESCRIPTION

Locality: Havieron - 45km east of Telfer Gold MineDatum: Lat 21o 42' 00" S, Long 122o 37' 00" E (GPS)Boundary: thence to Lat 21o 42' 00" S, Long 122o 41' 00" E thence

to Lat 21o 45' 00" S, Long 122o 41' 00" E thence to Lat21o 45' 00" S, Long 122o 37' 00" E thence back to datum(values obtained from GPS)

Area : Type Dealing No Start Date AreaApplied For 01/08/2020 3,816.00000 HA

SHIRE DETAILS

Shire Shire No Start End AreaEAST PILBARA SHIRE 3220 03/08/2020 3,815.66225 HA

RENT STATUS

Due For Year End 02/08/2021: N/ADue For Year End : N/A

EXPENDITURE STATUS

Expended Year End : N/ACurrent Year Commitment : N/A


Attachment 1B: Current Company Extract

Current Company Extract

Name: NEWCREST OPERATIONS LIMITEDACN: 009 221 505

Date/Time: 05 August 2020 AEST 09:10:31 PM

This extract contains information derived from the Australian Securities and Investments Commission's (ASIC) database under section 1274A of the Corporations Act 2001.

Please advise ASIC of any error or omission which you may identify.

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