IRON RIDGE PROJECT WORKS APPROVAL APPLICATION

ATTACHMENT 3A ENVIRONMENTAL COMMISSIONING PLAN

Revision: B Date: June 2020

Prepared by Ecotec (WA) Pty Ltd for:

Fenix Resources Ltd Office 10, 1202 Hay Street West Perth WA 6005

Contact: Rob Brierley

Email: rob@fenixresources.com.au

Fenix Resources Ltd Iron Ridge Project Works Approval Application Supporting Information April 2020

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1.0 WASTEWATER TREATMENT PLANT AND SPRAY FIELD.

Following construction, the WWTP will require a period of 3 – 5 weeks for commissioning. During this time the required bacteria and micro-organisms will become established and frequent monitoring will be undertaken to ensure the water quality parameters of the effluent are being achieved. The system will be adjusted until the parameters are met.

Monitoring will be conducted at least weekly for the duration of the commissioning period. Commissioning will be deemed complete when the target values are achieved for at least two consecutive monitoring events.

Table 3.1: Treated wastewater effluent commissioning monitoring parameters.

Monitoring Parameter Target Value Units Monitoring Frequency

Volume discharged - m3 Continuous

Total Suspended Solids <30 mg/L

Weekly

Total Dissolved Solids <1300 mg/L

Total Nitrogen <30 mg/L

Total Phosphorous <8 mg/L

pH 6.5-8.5 pH units

E. coli <1000 cfu/100ml

Residual chlorine 0.2-2 mg/L

Attachment 3A-1 is the commissioning checklist provided by the manufacturer.

Fenix Resources Ltd Iron Ridge Project Works Approval Application Supporting Information April 2020

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2.0 WATER STORAGE DAM

The water storage dam will be constructed at the commencement of site establishment activities and will be predominately for the purpose of supplying water for dust suppression. Watercarts will be filled from the dam via a standpipe. The groundwater is of near-fresh quality and does not present a risk to vegetation in the event of a spill, however safeguards will be in place to protect water infrastructure and contain spills.

A 100 mm pipeline will be constructed from the production bores, positioned in a V drain alongside the haul road, to deliver groundwater to the water storage dam. A smaller diameter pipeline will divert water from the main pipeline to a raw water tank at the camp. This will be treated by reverse osmosis to produce potable water and stored in a series of potable water tanks for domestic use. Attachment 3A-2 includes the site layout, showing the proposed pipeline routes.

The water storage dam will be constructed as a “turkey’s nest”, with material excavated from within the dam to construct the perimeter wall. The total depth to the centre of the dam will be approximately 4 m, with approximately 2.6 m of excavation and 1.4 m of wall height. The dam will have a capacity of approximately 1700 m3. Attachment 3A-2 includes the proposed dam design.

An HDPE liner will be installed and secured around the crest of the dam before the pipework is installed. A high level indicator and automatic shutoff will be installed within the dam to ensure it is not overfilled. A freeboard of 0.5 m will be maintained at all times. A lined spillway will be installed to direct overflow out of the dam in an emergency, such as an extreme rainfall event. In such an event, any overflow will be rainwater and therefore unlikely to impact the receiving environment.

The dam will be fenced to prevent access by stock and native wildlife. Egress matting will also be installed to provide a means of escape for fauna (small mammals, reptiles) entering the dam.

Commissioning activities for the dam and associated pipework will include:

• The dam is constructed as per the final design.

• The liner is intact and secured.

• Fencing and egress matting are installed.

• Pipework is installed in suitable V drains or bunding to prevent accidental impact and contain leaks.

• Pipework is charged and inspected for leaks.

• High level indicators and shutoff valves are tested to ensure they are functioning correctly.

Regular inspections of the pipelines, tanks and dam will be conducted thereafter to identify leaks, damage and other maintenance issues.

Fenix Resources Ltd Iron Ridge Project Works Approval Application Supporting Information April 2020

Attachment 3A-1

WWTP commissioning checklist.

TRISTAR WATER SOLUTIONS

Client:

Project:

Site:

Date:

Item No Description Signed Date Remarks

1Check the electrical control panel i.e. termination, wiring,

circuit brakers, indicators

2Check hand rails installation

3Check man-hole cover installation

4Check the integrity of SAF container i.e. dent, bend & pores

5Check the coating finishing i.e., corrosion, scretches &

decolour

6Hydrotest 100% each chamber of the SAF container and

check for leaks

7Check operation of valves and check for leaks

8Pressure/service test pipework and check for leaks

9Check rotation of Balance Pump, Air Blower, Filter Feed

Pump, Irrigation Pump and Backwash Pump

10

Check operation of Balance Pump in manual mode. Confirm

flow is discharged into Primary Tank No.1. Throttle

discharge valves on Balance Pump to set the required

flowrate into Primary Tank No.1. Required flow to Primary

Tank No. 1 is 1.5m3/hr

11

Coagulant Dosing Pump runs when Balance Pump runs.

With Balance Pump running prime Coagulant Dosing Pump

and set the output of the Coagulant Dosing Pump at 2%

12Check operation of Air Blower and record pressure in

manual mode

13Check air diffusers for even distribution. Throttle air supply

valves if required.

14Check air pipeworks for leaks

15Check submerged media installation

16Check tank overflows i.e. volume, colour & turbidity

SAF WWTP: Commissioning ITP

Page 1

TRISTAR WATER SOLUTIONS

17

Check RAS flow i.e. Throttle air supply valves in Clarifier (at

startup set to 75% open). Check flow is exiting pipe in

Primary Tank No.1. Throttle air supply valve in Aerobic Tank

(at startup set to 75% open). Check flow is exiting in the

Anoxic Tank.

18

Check scum flow i.e. Throttle air supply valve in Clarifer (at

startup set to 50% open). Check flow is exiting pipe in

Primary Tank No. 1

19

Check operation of Media Filter control head and confirm

settings are correct for normal operation. Head should be

in SRV mode.

20

Check operation of Media Filter Feed Pump in manual

mode and record pressure. Check flow is exiting Media

Filter and transfering to Irrigation tank. Throttle discharge

valve after Media Filter to set Filter Feed Pump pressure

and flow. Filter Feed Pump set discharge pressure is

290kPa, which equates to a flowrate of 3.0m3/hr. Filter

feed pump model CRI5-5.

21

Check Operation of media filter backwash pump in manual

mode. Before starting backwash pump set media filter

head to backwash mode by holding down the recycle

buttom for 5 seconds. Once head has change position start

backwash pump in manual. Backwash pump set discharge

pressure is 385 kPa, which equates to a flow rate of 4.2

m3/hr. Backwash pump model CRI5-7. Check flow is exiting

reject line in balance tank. Once complete shutdown

backwash pump and press recycle button on media filter

head serval times until control head is back to service

position.

22

Check operation of Irrigation Pump and record pressure in

manual mode. Confirm spray field is operational and check

all sections for leaks and correct operation of sprinklers.

23Check operation of treated effluent flow meter

24

Set Balance Pump to automatic mode and check the

start/stop operation of the Balance Pump. At low level

Balance Pump shall stop, at high level Balance Pump shall

start, at high high level alarm shall activate.

25Set Air Blower to automatic mode. Air Blower shall run

continously.

Page 2

TRISTAR WATER SOLUTIONS

26

Set Filter Feed Pump to automatic mode and check the

start/stop operation of the Filter Feed Pump. At low level

Filter Feed Pump shall stop, at high level Filter Feed Pump

shall start, at high high level alarm shall activate.

27

Set Backwash Pump to automatic mode. Check Backwash

Pump starts and Filter Feed Pump stops on activation of a

manual backwash i.e. hold down recycle button of Media

Filter head for 5 seconds and monitor backwash cycle.

Check Backwash Pump stops on activation of low level float

in Irrigation Tank.

28

Set Irrigation Pump to automatic mode and check the

start/stop operation of the Irrigation Pump. At low level

Irrigation Pump shall stop, at high level Irrigation Pump

shall start, at high high level alarm shall activate.

29Insert Trichlor tablets in Tablet Chlorinator

30Introduce seed sludge. Start transfering raw sewage to

WWTP with plant in full automatic

31Train Operator in operations and maintenance of plant

32Check Operating Manual is available on site

33Clean site area

Final remarks & comments

Tristar Commissioning Engineer Client Representative

Signed Signed

Page 3

Fenix Resources Ltd Iron Ridge Project Works Approval Application Supporting Information April 2020

Attachment 3A-2

Site layout showing pipeline routes.

Water storage dam design details.

Pit

WasteDump

Fuel Storage

Magazine

ROM

Product Stockpile & Loading

Office

Crusher Workshops & Laydown

Fuel Storage Camp

Water Storage Dam

Low Grade Stockpile

Abandonment Bund

WWTPSpray Field

Pipeline

Reverse Osmosis Plant

Pipeline

Bioremediation AreaM 20/118-I

L 20/83

L 20/84

G 20/28

L 20/85

566000

566000

568000

568000

7018

000

7018

000

7020

000

7020

000

LegendProposed InfrastructureTenementsWaterwayExisting Track

Prescribed Activity AreaPipelineBioremediation Area

Drawn: CAD Resources ~ www.cadresources.com.au ~ Tel: (08) 9246 3242 ~ Fax (08) 9246 3202 ~ Source: Infrastructure (28/04/2020), Aerial: Landgate (Jan 2005)

Date: June 2020 Rev: C A4CAD Ref: a2707_F020_01

Scale: 1:20,000MGA94 (Zone 50)

Figure:

as at 26/06/2020Prescribed Activities

Iron Ridge Project20

0 200 400m