attachment 3a - der.wa.gov.au
TRANSCRIPT
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: [email protected]
Fenix Resources Ltd Iron Ridge Project Works Approval Application Supporting Information April 2020
2
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
3
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