Network Operator and Retail Supplier Licence Application Form
8 Chifley Square
Mirvac Real Estate Pty Ltd
Appendices Section 4
APPENDIX 4.2.1 PART I
PROCESS FLOW DIAGRAM
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APPENDIX 4.2.1 PART II
GE SUPPLIED SKIDS INFORMATION
(CONFIDENTIAL SUBMISSION ONLY)
APPENDIX 4.2.1 PART III
RO SKID INFORMATION
Fact Sheet
Find a contact near you by visiting www.ge.com/water and clicking on “Contact Us”.
* Trademark of General Electric Company; may be registered in one or more countries.
©2010, General Electric Company. All rights reserved.
FS1131EN.doc Sep-10
E4H Series 50 Hz Reverse Osmosis Machine 2.6-6.8 cubic meters per hour
Figure 1: E4H Series
When you mention reverse osmosis (RO), GE is the first name to come to mind. Our E-series RO ma-chines (Figure 1) are designed for durable operation, high quality product water production, easy installa-tion and straightforward control.
General Properties
Typical Applications • Process ingredient water • Safe drinking water • Boiler feed water • Ion exchange pre-treatment
Standard Economy Features • 5-micron pre-filter and housing, 20-inch (50.80 cm) • Automatic inlet shutoff valve • Motor thermal protection • Pre/Post-filter and primary/final pressure
gauges
• Permeate and concentrate flow rotameters • Permeate conductivity meter • ALARMS: Low inlet pressure, high amp draw • Feed water flush on shut down
Deluxe (DLX) Features – In addition to ECN Features • Accutrak RO microprocessor controller • SD card for collection of operating data • Permeate and concentrate paddlewheel flow
sensors • Inlet pH sensor • Permeate tank level monitoring • Chemical dosing pump for antiscalant dosing or
pH adjustment • Clean in Place (CIP) system, 5 HP (3.7 KW) • ALARMS: Low inlet pressure, high concentrate and
permeate pressure, high temperature, high per-meate conductivity, high/low pH, motor fault, and fill-time exceeded
Table 1: Operating Parameters
Operating Pressure 14-15 bar Maximum Recovery 75% Nominal Rejection 95-98% Operating Temperature 13-30 °C (55-85 °F) Minimum Inlet Pressure 2 bar (30 psig) Design Temperature 25 °C (77 °F)
Page 2 FS1131EN
Table 2: Materials of Construction
Frame Painted Carbon Steel Membrane Elements Desal AG4040 Membrane Housing FRP Low Pressure Pipe Schedule 80 PVC High Pressure Pipe Stainless Steel Motor Starters NEMA 4
Table 3: Pump and Motor
Pump Manufacturer Tonkaflo Pump Type Multi-stage, centrifugal Materials SS shell/housing, Noryl* internals Castings SS inlet/discharge Motor 3-phase, TEFC, 380 VAC
Table 4: E4H Specifications - 50 Hz
Model E4H-16K E4H-21K E4H-27K E4H-38K E4H-43K
ECN DLX
1163816 1200080
1163820 1200084
1163824 1200088
1163828 1200092
1163830 1200094
Flow Specifications
Recovery Range: Permeate Rate: m3/h (gpm) Concentrate Rate: m3/h (gpm)
66-75% 2.56 (11.2)
0.9 (3.4)
66-75% 3.4 (15) 1.1 (5.0)
66-75% 4.3 (18.8) 1.4 (6.3)
66-75% 5.9 (26.2) 2.0 (8.8)
66-75% 6.8 (30) 2.3 (10)
Pump and Motor
RO Pump Model SS2834D SS2834D SS5512D SS5518KB SS5518KB RO Motor: KW (HP) 5.6 (7.5) 5.6 (7.5) 7.4 (10) 11.2 (15) 11.2 (15) CIP Pump Model: (DLX only) SS2808AZ SS2808AZ SS5503G SS5503G SS5503G CIP Motor: KW (HP) 1.5 (2) 1.5 (2) 2.2 (3) 2.2 (3) 2.2 (3)
Membrane Elements and Filters Membrane Quantity Array Pre-Filter Quantity
9 2-1 2
12 2-2 2
15 3-2 2
21 4-3 2
24 5-3 2
Connections
Inlet: cm (inch) Permeate: cm (inch) Concentrate: cm (inch)
3.8 (1.5) 2.5 (1.0) 2.5 (1.0)
3.8 (1.5) 2.5 (1.0) 2.5 (1.0)
3.8 (1.5) 2.5 (1.0) 2.5 (1.0)
3.8 (1.5) 2.5 (1.0) 2.5 (1.0)
3.8 (1.5) 2.5 (1.0) 2.5 (1.0)
Dimensions & Weights
Height: cm (inch) Width: cm (inch) Depth: cm (inch)
158 (62) 335 (132)
92 (36)
158 (62) 335 (132)
92 (36)
158 (62) 335 (132)
92 (36)
158 (62) 335 (132)
92 (36)
158 (62) 335 (132)
92 (36)
Shipping Weight Estimate: kg (lb) ECN
500 (1000)
500 (1050) 700 (1550) 800 (1700) 820 (1800)
Shipping Weight Estimate: kg (lb) DLX 530 (1150) 570 (1250) 800 (1750) 870 (1900) 910 (2000)
APPENDIX 4.2.3
LOCATION MAP
APPENDIX 4.2.7
MONTHLY WATER BALANCE
8 Chifley Square water balance June 2011
Arup - June 2011
Monthly water balanceAll numbers in KL and monthly averages
MonthCooling
Towers
Cooling
Basebuild
Building
NPCW
Total NPCW
loadRainwater
Proposed BW
plant
processed with
80% RO
Building
Black
Water
Blow Down
15% total
Total Black
water
generated with
15% to sewer
Sewer mining
required
including RO
losses 20%
Building
Potable
Extra 10%
cooling tower
from potable
January 394.8 500.00 218.4 1113.20 120.3 1191.5 507.1 134.2 565.3 626.3 288.7 295.90
February 351.8 500.00 218.4 1070.24 136.8 1120.2 507.1 127.8 558.8 561.4 288.7 190.04
March 382.5 500.00 218.4 1100.93 153.0 1137.5 507.1 132.4 563.4 574.1 288.7 93.12
April 380.5 500.00 218.4 1098.88 147.1 1142.2 507.1 132.1 563.1 579.1 288.7 58.84
May 394.8 411.66 218.4 1024.86 143.1 1058.1 507.1 121.0 552.0 506.1 288.7 0.00
June 368.2 266.66 218.4 853.27 149.9 844.1 507.1 95.2 526.3 317.8 288.7 0.00June 368.2 266.66 218.4 853.27 149.9 844.1 507.1 95.2 526.3 317.8 288.7 0.00
July 394.8 297.12 218.4 910.32 114.4 955.1 507.1 103.8 534.8 420.3 288.7 0.00
August 388.7 300.51 218.4 907.58 95.4 974.7 507.1 103.4 534.4 440.3 288.7 0.00
September 374.3 300.51 218.4 893.26 81.2 974.5 507.1 101.2 532.3 442.2 288.7 0.00
October 394.8 497.62 218.4 1110.82 90.4 1224.5 507.1 133.9 564.9 659.6 288.7 0.00
November 374.3 463.27 218.4 1056.02 97.1 1150.7 507.1 125.6 556.7 594.0 288.7 0.00
December 388.7 500.00 218.4 1107.07 90.9 1219.4 507.1 133.3 564.3 655.1 288.7 152.40
Total 4588.3 5037.4 2620.8 12246.5 1419.6 12992.3 6085.2 1443.8 6616.3 6376.0 3464.4 790.30
Annual summary
Annual KL/year KL/m21200.00
Total NPCW Consumption
Annual KL/year KL/m2
19000
Potable 4254.7 0.22
NPCW - WCs 2620.8
NPCW- Cooling towers 9625.7
Total NPCW 12246.5
Total water (if all Potable) 16501.2 0.87
0.00
200.00
400.00
600.00
800.00
1000.00
NPCW (non-CT)
Cooling Towers Base build
Cooling Tower Tenants
APPENDIX 4.2.8
DAILY WATER BALANCE
8 Chifley Square water balance
Arup - June 2011
Daily water balance for January Sewer mining requiredAll number litres and Basebuild cooling towers capped at 500KL for month All numbers litres
JanCooling
towersWC
Total Daily
NPCW
required
Average
Rainwater
Required
output from
Black water
plant
Black water
size to offset
RO loses
@20%
Building
generated
black water
Cooling
tower Blow
down 15%
Total building
generated
Black water
Total
allowing 15%
to sewer
Sewer mining
required number
includes RO losses
1 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
2 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
3 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
4 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
5 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 6263
6 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 62636 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 6263
7 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
8 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
9 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
10 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
11 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
12 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 6263
13 13,220 0 13220 3861 9359 11231 0 1983 5844 4967 6263
14 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
15 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
16 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
17 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
18 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
19 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 861
20 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 86120 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 861
21 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
22 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
23 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
24 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
25 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
26 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 861
27 8,182 0 8182 3861 4321 5186 0 1227 5088 4325 861
28 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
29 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
30 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
31 36,319 10080 46399 3861 42538 51046 23410 5448 32719 27811 23235
Total 920,953 231,840 1,152,793 119691 1033102 1239723 538430 138143 796264 676824 562898
BW plant size: 50KL/day plant utilising buffer storage in NPCW tank Approximately 50/50 sewer mining and building black water loadBW plant size: 50KL/day plant utilising buffer storage in NPCW tank Approximately 50/50 sewer mining and building black water load
APPENDIX 4.2.10
PRELIMINARY RISK ASSESSMENT
8 Chifley Square
Recycled Water Plant
Preliminary Risk Assessment
Preliminary Risk Assessment – 8 Chifley Square Recycled Water Plant
1
Prepared for: Planet Plumbing Group Pty Ltd By: Innaco Pty Ltd Level 5, 79 Victoria Avenue, Chatswood, NSW 2067 February 2012
REVISION HISTORY
Revision number
Prepared by Description Date
0 Lars Herngren IPART issue February 2012
DOCUMENT ACCEPTANCE
Action Name Signed Date
Prepared by Lars Herngren February 2012
Reviewed by Peter Warren February 2012
Preliminary Risk Assessment – 8 Chifley Square Recycled Water Plant
2
1. Introduction and methodology Innaco Pty Ltd is currently preparing the detailed design documentation, approval documentation to supply, install and operate the proposed recycled water plant at 8 Chifley Square. As part of the concept design, a preliminary risk assessment has been prepared to assist Mirvac in the application for a network operator’s license under the Water Industry Competition Act 2006 and to assist in the detailed design process. During the risk assessment process all steps of the scheme, sources of water, treatment, storage, distribution and irrigation systems, end uses, any residuals, any unintended or unauthorised end uses, any discharges or releases to the environment, receiving environment and routes of exposure were considered in relation to the quality and/or safety of the recycled water. A risk assessment of the identified potential public and environmental health impacts enables a level of probability or likelihood of occurrence of the impact and the significance of the impact to be assigned. This enables a risk level to be assigned to each impact. The level of risk can then be used as a guide to determining the nature and extent of environmental management required for each environmental aspect. The following tables illustrate the method of analysis utilised for this risk assessment. The method is based on the Australian/New Zealand standard for Risk Management (AS/NZS 4360:2004) and the Australian Guidelines for Water Recycling: Managing Health and Environmental Risks (NWQMS 2006), modified slightly to reflect risks as they apply to the scheme. Table 1.1: Measures of Likelihood Level Descriptor Description A Almost
Certain Event expected to occur often (several times per year)
B Likely Event will probably occur often (once every 1 to 3 years)
C Possible Event might occur (once every 3 to 10 years) D Unlikely Event could occur (once every 20 years) E Rare Event will occur only in rare circumstances (once
every 100 years)
Preliminary Risk Assessment – 8 Chifley Square Recycled Water Plant
3
Table 1.2: Measures of Consequence of Impact Level Descriptor Description
Human health Environmental health 5 Extreme Severe illness or death
affecting a large population Severe, permanent environmental impact
4 Major Severe illness or death affecting a small population
Severe, long-term environmental impact
3 Moderate Short-term, low level illness, affecting a large population
Localised, medium-term environmental impact
2 Minor Short-term, low level illness affecting a small population
Localised, short-term environmental impact
1 Insignificant No detectable human health illness
No detectable environmental impact
Table 1.3: Qualitative Risk Analysis Matrix – Risk Rating
Likelihood Consequences Insignificant (1) Minor (2) Moderate
(3) Major (4) Extreme (5)
Almost Certain (A) Low Medium High Very High Very High Likely (B) Low Medium High Very High Very High Possible (C) Low Medium Medium High Very High Unlikely (D) Low Low Medium High High Rare (E) Low Low Low Medium High Table 1.4: Risk Rating and Required Management Level Risk Rating Required Management Level Very High Extremely or significantly impacting activity, which requires a high level of
management. Immediate action required.
High Requires further management planning to ensure that environmental issues are addressed. Requires additional investigation to confirm the level of risk.
Moderate Managed by utilising standard procedures or guidelines. May be managed as part of on-going site management.
Low Certain activities, which offer negligible impacts on an infrequent basis, may be regarded as insignificant given current levels of control. The risk of the activity is accepted without applying additional management
Preliminary Risk Assessment – 8 Chifley Square Recycled Water Plant
4
2. Risk events and associated ratings The risk assessment for the site is an on-going process and will be reviewed during the design phase to ensure appropriate measures have been taken in the design (where applicable) to manage the risks. This preliminary risk assessment is the first step in creating HAZOP and HACCP checklists that will be carried over into the construction stage and the commission/handover stage of the project.
Preliminary Risk AssessmentProject: 10570 - Chifley Square Revision Description Date Issued By
1 Preliminary Issue 24/02/2012 DR, LH
Process step Risk Event Hazard Likelihood Consequence Risk Design control measures currently in place by Innaco
Additional Control measures Responsibility for additional control measures
Residual likelihood
Residual Consequence
Residual risk
Is this a critical control point?
Control point number
Elevated temperature in building waste water that may influence the treatment plant operation
Pathogens in recycled water
Unlikely Minor Low Pump station and balance tank. Piped system throughout building. Underground sewer in street.
N
Unplanned contaminants within source water such as cleaning products, metho etc. Small volumes
Unacceptable levels of nutrients, metals, surfactants, organic compounds, volative
Possible Insignificant Low pH sensor in pump station to detect abnormal values. Pump station can be pumped out. All inflow can be turned off.
Cleaning procedures being maintained. Effluent monitoring to detect certain chemicals. Chemical management.
Mirvac Unlikely Insignificant Low N
Illegal disposal of foreign material, chemicals and solids within source water (disposal in toilets etc)
Breakdown of treatment plant or pumps
Possible Minor Medium Macerator pumps, inlet screens on both rainwater and blackwater treatment
Signage. Separate disposal for hygiene products and sharps. Alarm on macerator pump to be linked to treatment plant control system.
Mirvac Unlikely Minor Low N
High concentrations of oil and grease entering the treatment system
Reduction in treatment process effectiveness. Damage to UF Membranes
Possible Moderate Medium Separate oil and grease arrestors installed which will be maintained regularly. Sensor to be installed in pump station. Inflow to be diverted if high levels occur. Rainwater only harvested from roof.
Mirvac to schedule pumpout of oil and grease arrestors regularly
Mirvac Rare Moderate Low Y CCP2
Inflow exceeds expected volume or flow rate or prolonged high inflow situations
Overflow and spill in room
Possible Moderate Medium Duty/Standby pumps in pump pit. Gravity overflow connection from pump pit to sewer. Diversion valves on both sewer mining connection and building connection. Overflow connections to sump pit from balance tank. High level alarms in pump station to close diversion valves. Diversion of rainwater to stormwater system
Rare Moderate Low Y CCP3
Periods of none or little inflow (holiday, maintenance etc)
Reduction in treatment process effectiveness
Possible Minor Medium Recycled water can be re-circulated through the system to maintain process activity.
Unlikely Minor Low N
High levels of solids, paper etc in Sydney Water main
Blockage of sewer mining connection leading to no flow to pump station
Possible Minor Medium None Sewer mining connection to be approved by Sydney Water.
Mirvac Unlikely Minor Low N
No usage of sewer mining connection to top up supply for long periods
Blockage of sewer mining connection leading to no flow to pump station
Possible Minor Medium Motorised valve can be opened to let flow through to pump station for processing or overflow. To be scheduled in logic.
N
Power failure Inflow continues leading to overflow and spills
Possible Minor Medium Motorised diversion valves to default shut in a power failure. Gravity overflow connection from pumpstation to sewer in Elizabeth St.
Unlikely Minor Low N
Reverse flow into Sydney Water main Discharge into Sydney Water main outside trade waste agreement
Possible Minor Medium Overflow connection in pump pit lower than sewer invert.
Unlikely Minor Low N
Influent quality out of spec - rainwater Mixing with treated water in the recycled water storage tank
Unlikely Minor Low Screen and chlorination treatment
Influent quality out of spec - wastewater Upset biological process and recycled water quality
Possible Minor Medium Motorised diversion valves to sewer. pH sensor and oil sensor in pump station. Pump station can be pumped out to sewer
Unlikely Minor Low Y CCP1, CCP2
CCP1Pathogens in recycled water
Cleaning chemicals that may influence the biological treatment system leading to pathogen removal loss
Almost certain pH sensor in pump station to detect abnormal values. Pump station can be pumped out. All inflow can be turned off.
Source Blackwater and Rainwater
YMinor Medium List of approved chemicals to enter the treatment plant should be described in the cleaning procedures for the building.
Mirvac Possible Minor Medium
Process step Risk Event Hazard Likelihood Consequence Risk Design control measures currently in place by Innaco
Additional Control measures Responsibility for additional control measures
Residual likelihood
Residual Consequence
Residual risk
Is this a critical control point?
Control point number
Illegal disposal of foreign material, chemicals and solids within source water (disposal in toilets etc)
Pump failure Possible Minor Medium Macerator pumps, duty/standby Signage in building toilets. Mirvac Unlikely Minor Low N
Prolonged high inflow situations Pump station overflow Possible Minor Medium High level alarms, gravity overflow connection to sewer
Unlikely Minor Low Y CCP3
Illegal disposal of foreign material, chemicals and solids within source water (disposal in toilets etc)
Tank damage or failure
Rare Moderate Low Tank design to consider such items N
Odour from pump station Odour complaints from staff or customers
Possible Insignificant Low Closed tanks. Mechanical ventilation to room.
N
Limited pump station capacity due to elevated sludge levels in tank
Low pump station capacity
Possible Minor Medium High level alarms, gravity overflow connection to sewer. Pump out of pump station if required.
Unlikely Minor Low N
No influent Low level, biological process suffer
Possible Minor Medium Low level alarm Unlikely Minor Low N
Pump station rupture Spill Unlikely Moderate Medium Ensure design and installation of pump station is certified for its design life. Ensure correct maintenance
Rare Moderate Low N
High or low pressure due to pipe burst or pipe blockage
Pump failure Possible Minor Medium Trip and alarm on pumps Unlikely Minor Low Y CCP4
Pump noise complaints from staff and customers
Noise emitted from room
Possible Insignificant Low Acoustic barriers. N
Odour complaints from residents, staff or customers
Odour emitted from treatment plant room
Possible Insignificant Low Ventilation in room. N
Unauthorised access to treatment plant room Personal injury, vandalism, chemical spills, treatment process change
Possible Major High Locked room Mirvac access procedures. Plant room security. Alarmed and monitored by security.
Mirvac Rare Major Medium Y CCP5
Non compliance with plant operational and maintenance procedures
Treatment plant failure, unacceptable recycled water quality, risk of personal injury
Possible Moderate Medium Treatment plant induction and training. Audit and inspection process. Operation and maintenance contract to be kept in place and followed.
Engage suitable contractor Mirvac Rare Moderate Low N
Emergency situations, unplanned events, plant breakdown, catastrophic events
Personal injury, human and environmental health risk, cross contamination, overflows
Unlikely Major High None Emergency and incident response procedures , pumpout procedures
Mirvac Rare Major Medium N
Power failure Shutdown of plant Almost certain Minor Medium Diversion to sewer Emergency and incident response procedures. Emergency pumpout if required.
Mirvac Unlikely Minor Low N
Incorrect installation Treatment plant failure, unacceptable recycled water quality, risk of personal injury
Likely Minor Medium Treatment plant supplier installation and commissioning
Unlikely Minor Low N
Plant fails to produce recycled water meeting water quality requirements
Human and environmental health risk
Possible Minor Medium Commissioning, validation and verification. On-going testing to meet authority requirements. Dual reticulation in toilets, cooling tower and irrigation lines.
Effluent monitoring, operation & maintenance procedures to be followed, alarms to be connected to central alarm system in building.
Mirvac Unlikely Minor Low Y CCP6
Treatment system general - Blackwater and rainwater
Pump station and macerator pumps -Blackwater
Process step Risk Event Hazard Likelihood Consequence Risk Design control measures currently in place by Innaco
Additional Control measures Responsibility for additional control measures
Residual likelihood
Residual Consequence
Residual risk
Is this a critical control point?
Control point number
High inflow Exceeding screen capacity
Possible Minor Medium Capacity of screen to match pump station capacity, flow meter
Unlikely Minor Low Y CCP7
High levels of solids or large material etc entering screens
Screen blockage Possible Minor Medium Duty/standby screens, overflow connected to sump pit
Unlikely Minor Low N
No outflow from screens to tank due to screen blockage
No flow to bioreactor Possible Minor Medium Duty/standby screens, overflow connected to sump pit, alarms
Unlikely Minor Low N
Odour complaints Odour emitted from screens
Possible Minor Medium Screening area to be covered Unlikely Minor Low N
High inflow Exceeding screen capacity
Possible Minor Medium Diversion to stormwater Unlikely Minor Low N
High levels of solids or large material etc entering screens
Screen blockage Possible Minor Medium Diversion to stormwater Unlikely Minor Low N
No outflow from screens to tank due to screen blockage
No flow to recycled water tank
Possible Minor Medium Diversion to stormwater Unlikely Minor Low N
Odour complaints Odour emitted from screens
Unlikely Minor Low Enclosed screen Low N
Low level Insufficient chlorine dosing
Possible Minor Medium None Regular inspections as part of general operation and mainteance
Mirvac Unlikely Minor Low N
Low chlorine residual Poor disinfection Possible Minor Medium None Residual chlorine sensor Planet Plumbing Unlikely Minor Low N
High chlorine residual Odour/Aesthetic issues Possible Minor Medium None Residual chlorine sensor Planet Plumbing Unlikely Minor Low N
High or low pressure Pump failure Possible Minor Medium None Trip and alarm on pump Planet Plumbing Unlikely Minor Low N
High inflow Overflow Possible Minor Medium Level sensor with high level alarm in tank. Overflow connected to sewer
Unlikely Minor Low Y CCP7
Deposition of solids, buildup of material Lowering capacity of buffer tank
Possible Minor Medium Inlet screens before tank. Macerator pumps before tank. Pump out from maintenance hatches if required
Unlikely Minor Low N
Balance tank pump failure No flow to bioreactor Possible Minor Medium Duty/standby pumps, trip and alarm Unlikely Minor Low Y CCP8
Low inflows and usage Tank turn septic Possible Minor Medium Pumps to be able to recirculate water in tank
Unlikely Minor Low N
Pump failure Reduction in effluent quality and odour complaints
Possible Minor Medium Tripped overload alarm in control panel. Duty/Standby pumps for process and RAS.
Operation and maintenance manual of the plant to be followed. Service of pumps included in maintenance contract.
Mirvac Unlikely Minor Low Y CCP9
High level of gross solids entering tank Sludge build up in base of tank
Possible Minor Medium Inlet screening Unlikely Minor Low
High level Overflow Possible Minor Medium Gravity overflow connection to sewer. High level alarms
Unlikely Minor Low Y CCP10
Low level Biomass dies leading to reduced end use water quality
Possible Minor Medium Level sensor with alarms in tank Unlikely Minor Low Y CCP10
DO levels not reaching set values Blowers keep running - Risk for Foaming
Possible Minor Medium Timer on blowers to avoid over-aeration. Bioreactor to be closed top. DO sensor to have automatic cleaning.
Unlikely Minor Low Y CCP11
Low air flow from blowers Biomass dies leading to reduced end use water quality
Possible Minor Medium DO sensor in bioreactor with set values. Blower alarms.
Unlikely Minor Low Y CCP12
Accidental shutdown of plant leading to anaerobic conditions in bioreactor tank
Odour complaints Possible Minor Medium None Room to be locked at all times. Access only by trained staff. Shutdown procedure to follow operation and maintenance manual
Mirvac Unlikely Minor Low N
Drop in pH Biomass dies leading to reduced end use water quality
Possible Minor Medium pH sensor in bioreactor. Chemical dosing available, caustic.
Unlikely Minor Low Y CCP13
Blower failure Reduction in effluent quality and odour complaints
Possible Minor Medium Tripped overload alarm in control panel. Duty/Standby process blowers.
Operation and maintenance manual of the plant to be followed. Daily checks. Service of pumps included in maintenance contract.
Mirvac Unlikely Minor Low Y CCP14
Chlorine dosing - rainwater
Balance tank and pumps - blackwater
Inlet screens -Rainwater
Bioreactor tank - blackwater
Inlet screens - Blackwater
Process step Risk Event Hazard Likelihood Consequence Risk Design control measures currently in place by Innaco
Additional Control measures Responsibility for additional control measures
Residual likelihood
Residual Consequence
Residual risk
Is this a critical control point?
Control point number
High level Overflow from membrane tank
Possible Minor Medium Level sensor in membrane tank. Overflow to sewer.
Unlikely Minor Low Y CCP15
Low level Membrane dries out and fouls
Possible Minor Medium Level sensor in membrane tank. Low level alarm.
Unlikely Minor Low Y CCP15
Blower failure or lack of pressure Membrane fouling from lack of scouring
Possible Minor Medium Trip alarm Unlikely Minor Low Y CCP16
Maintenance cleans carried out incorrectly Damage to membranes Possible Minor Medium Follow operation and maintenance procedures
Operation and maintenance manual of the plant to be followed.
Mirvac Unlikely Minor Low N
High flux through membranes Reduction in effluent quality
Possible Minor Medium Trans-membrane pressure reading and alarms. Turbidity meter downstream.
Unlikely Minor Low Y CCP17
RO system - blackwater
Electrical conductivity differential low Reduction in effluent quality
Possible Minor Medium Online EC meter to shut down production of differential is not met.
Unlikely Minor Low Y CCP18
Low levels Reduction in effluent quality due to disinfection problems or pH control
Possible Minor Medium Daily checks. Level alarms on critical chemicals
Ensure operational procedures are followed.
Mirvac Unlikely Minor Low Y CCP19
Low dosage Degradation of stored chemical
Possible Minor Medium Size chemical storage appropriately Unlikely Minor Low N
No dosing Reduction in effluent quality
Possible Minor Medium Pressure limiting devices to be installed
Unlikely Minor Low N
High dosage Foaming, reduction in effluent quality
Possible Minor Medium pH sensor in bioreactor. Ability to send out of spec water to sewer. Chlorine residual sensor
Unlikely Minor Low Y CCP20
High turbidity Use of recycled water of insufficient quality for human and environmental health
Possible Minor Medium Turbidity measured online upstream of UV. UVT alarm on UV.
Unlikely Minor Low Y CCP21
Automatic wiper failure Insufficient disinfeciton
Possible Minor Medium Automatic wiper alarm Preventative maintenance Mirvac/Operator Unlikely Minor Low Y CCP22
No flow Lamp fouling due to over heating
Possible Minor Medium Lamp cleaning alarm. Unlikely Minor Low Y CCP23
Low transmittance Insufficient disinfeciton
Possible Minor Medium UVT alarm Unlikely Minor Low Y CCP24
High flow Insufficient disinfeciton
Possible Minor Medium Hydraulic design to ensure head losses have been allowed for and pump capacities are correct
Unlikely Minor Low N
UF-membranes -blackwater
Chemical dosing systems - blackwater
UV-disinfection - blackwater
Process step Risk Event Hazard Likelihood Consequence Risk Design control measures currently in place by Innaco
Additional Control measures Responsibility for additional control measures
Residual likelihood
Residual Consequence
Residual risk
Is this a critical control point?
Control point number
Low level Insufficient chlorine contact tank leading to insufficient disinfection
Possible Minor Medium Low level alarm Unlikely Minor Low Y CCP25
High level Overflow Possible Minor Medium High level alarm, bunded chemical area connected to floor waste and pump out pit.
Unlikely Minor Low Y CCP25
Low chlorine residual Poor disinfection Possible Minor Medium Residual chlorine sensor Unlikely Minor Low Y CCP20
High chlorine residual Odour/Aesthetic issues Possible Minor Medium Residual chlorine sensor Unlikely Minor Low Y CCP20
High or low pressure Pump failure Possible Minor Medium Trip and alarm on pump Unlikely Minor Low Y CCP26
Low level due to high demand Pump failure Unlikely Minor Low Pump overload protection. Potable water supply backup to tank. Level sensor.
Y CCP27
High level Storage tank overflow Possibe Minor Medium Overflow connection to sewer system. Unlikely Minor Low Y CCP27
Odour from storage tank Odour complaints Possible Insignificant Low Closed tank. Treated water N
Unauthorised use of stored water (overloading irrigation area etc)
Human and environmental health
Possible Minor Medium None Operational controls. Monitoring. Irrigation controls. Moisture sensors to be installed.
Mirvac Unlikely Minor Low N
Deliberate or inadvertent misuse of recycled water
Human and environmental health
Possible Minor Medium None Signage, distribution design to follow Australian Standards. Education. Operation & Maintenance procedures to be followed
Mirvac Unlikely Minor Low N
Salinity levels above accepted levels Less cycles in the cooling tower reuse
Possible Minor Medium EC meter after RO system EC meter in rainwater tank Planet Plumbing Unlikely Minor Low N
Cross connections Reverse flow in mains supply
Likely Moderate High Backflow prevention devices. Dual reticulation.
Recycled water piping to be lilac coded as required in Australian Standards. Signage on tanks.
Mirvac/Hydraulic Contractor
Rare Moderate Low N
Chlorine contact tank - blackwater
Final effluent storage tank - rainwater and blackwater
Process step Risk Event Hazard Likelihood Consequence Risk Design control measures currently in place by Innaco
Additional Control measures Responsibility for additional control measures
Residual likelihood
Residual Consequence
Residual risk
Is this a critical control point?
Control point number
Recycled water not meeting high risk exposure level recycled water requirements (contact, inhalation or ingestion)
Human health risk (illness)
Possible Minor Medium Critical control points to control log removal in order
Effluent monitoring, operational procedures of treatment plant. Disinfection alarms.
Mirvac Unlikely Minor Low N
Flow variability and reduced or increased pressures
Irrigation variability or tank overflow
Possible Minor Medium None Irrigation system design. Physical inspections of irrigation system and sprinkler heads etc. Alarms and water level sensor in recycled water tank to trigger pumpout. Connect alarm to treatment plant control panel.
Mirvac/Irrigation system designer
Unlikely Minor Low N
Excess irrigation causing surface runoff due to poor irrigation uniformity or scheduling
Erosion of soil Possible Minor Medium None Soil and plant monitoring plan to be implemented. Visual inspections.
Mirvac/Irrigation system designer
Unlikely Minor Low N
More water applied than uptake by plants Plant deterioration or death
Possible Minor Medium None Soil and plant monitoring plan to be implemented. Visual inspections
Mirvac Unlikely Minor Low N
Excessive salts applied with the recycled water or groundwater levels high
Salt scaulds Possible Minor Medium RO system in place Soil and plant monitoring plan to be implemented. Visual inspections
Mirvac Unlikely Minor Low N
Salinity, sodicity or boron toxicity of soil Death or poor growth of grass/plants
Possible Minor Medium RO system in place Soil and plant monitoring plan to be implemented. Visual inspections
Mirvac Unlikely Minor Low N
Boron toxicity, salinity, phosphorous or Chloride toxicity caused by the recycled water
Leaf discolouration or disfiguration
Possible Minor Medium Treatment system Soil and plant monitoring plan to be implemented. Visual inspections
Mirvac Unlikely Minor Low N
Excess nitrogen applied Lanky, succulent weak plants
Possible Minor Medium Biological treatment Soil and plant monitoring plan to be implemented. Visual inspections
Mirvac Unlikely Minor Low N
Unexpected inflow concentrations of certain chemicals/pollutants. Chemical spills, washdown of fatty food etc.
Other chemicals/pollutants leaching to groundwater or water courses
Possible Minor Medium None Soil and plant monitoring plan to be implemented. Visual inspections
Mirvac Unlikely Minor Low N
High chlorine residuals in recycled water Toxicity in plants and water bodies
Possible Minor Medium Chlorine residual sensor Soil and plant monitoring to be implemented in accordance with plans. Effluent monitoring.
Mirvac Unlikely Minor Low Y CCP20
Increasing the salinity of fresh groundwater or surface water
Leaching of salts from soil
Possible Minor Medium RO system in place Soil and plant monitoring plan to be implemented. Visual inspections.
Mirvac Unlikely Minor Low Y CCP18
Odour complaints from staff and customers Unpleasant odour from irrigated area
Unlikely Insignificant Low None Effluent monitoring, operational procedures of treatment plant. Disinfection alarms.
Mirvac N
Recycled water not meeting high risk exposure level recycled water requirements (contact, inhalation or ingestion)
Human health risk (illness)
Possible Minor Medium Ability to switch to potable water. Disinfection alarms.
Effluent monitoring, operational procedures of treatment plant. Signage and education.
Mirvac/Operator Unlikely Minor Low Y CCP28
Aesthetically displeasing Discolouration Possible Insignificant Low Turbidity monitoring in place. N
Odour in recycled water Odour complaints Possible Insignificant Low Chlorine disinfection N
Recycled water not meeting high risk exposure level recycled water requirements (contact, inhalation or ingestion)
Human health risk (illness)
Possible Minor Medium Turbidity monitoring, chlorine residual monitoring, CCPs in place to ensure water is not out of spec.
Unlikely Minor Low Y CCP
TDS concentrations too high Low cycle rate, high water usage
Possible Minor Medium RO system in place. Online EC meter. EC meter in rainwater tank Planet Plumbing Unlikely Minor Low Y CCP18
Odour in recycled water Odour complaints Possible Insignificant Low N
Uses of Recycled Water - Irrigation.
Uses of Recycled Water - Toilet flushing
Uses of Recycled Water - Cooling towers
APPENDIX 4.2.11
RECYCLED WATER MANAGEMENT PLAN EXAMPLE
(CONFIDENTIAL SUBMISSION ONLY)