Pinjarra Alumina Refinery – Efficiency Project

AUACDS-2063-52 Last Update: 20/11/2016

Pinjarra Alumina Refinery – Efficiency Project

Attachment 2 – Premises Map

AUACDS-2063-52 Last Update: 20/11/2016

AUACDS-2063-52 Last Update: 20/11/2016 Page 1


Attachment 3A – Description of Proposed Activities


PART 4: PROPOSED ACTIVITIES (INCLUDING CLEARING)

This document has been collated to provide the information required by Attachment 3A of the Department of Water and Environmental Regulation ‘Application Form: Works Approval / Licence /Renewal /Amendment /Registration’ (v10, February 2019).

Description/Overview

Alcoa of Australia Limited (Alcoa) proposes to undertake efficiency works within the Pinjarra Refinery. The proposal for this Works Approval application is for the construction and upgrade to infrastructure (the Proposal). The justification for the Proposal is to de-bottleneck and increase efficiency at the refinery to allow Alcoa to increase production to 5Mtpa, as approved by the Environmental Protection Authority (EPA) in Ministerial Statement 646 (21 September 2015).

As a prescribed premise under Part V of the Environmental Protection Act 1986 (EP Act), the Proposal will require approval under the Works Approval provisions. The facility is a prescribed premise under Categories 46, 52, 64 and 67. The works associated with this proposal relate to Category 46 prescribed premises under Schedule 1 of the Environmental Protection Regulations 1987.

Table 1: Summary of the Operating Information

Operating information Proposal

Estimated Operating Period of the Project / premises (based on estimated infrastructure life):

Life of mine

Proposed date/s for commencement of construction works (if applicable)

Construction to commence in approximately Quarter 2 2020

Proposed date/s for conclusion of works construction (if applicable):

[This date should coincide with the submission to DWER of an Environmental Compliance Report and/or a Critical Containment Infrastructure Reports as required]

Progressive commissioning from 2020

Proposed date/s for commissioning of works (if applicable) Progressive commissioning from 2020

Proposed date/s for commencement of operations (if applicable)

Operation to commence in approximately Quarter 4 2021

Maximum production or design capacity for each category applied for (based on infrastructure operating 24 hours a day, 7 days per week):

5Mtpa

Estimated/actual throughput for each category applied for: 5Mtpa


Proposed Activities

The key infrastructure and equipment associated with the Proposal is summarised in the table below.

Table 2: Key Operations Infrastructure & Equipment for the Pinjarra Efficiency Project

Proposal Components Proposal Scale and Description Building 15 Bauxite Reclaim

Replacement of Reclaimer 1.

Upgrades to the Bauxite Reclaim Area allows for increased bauxite throughput to milling, providing sufficient bauxite slurry for the increased digestion requirements. Reclaimer 1 will be replaced with a new reclaimer and associated conveying system upgrades.

Building 25 Milling

Installation of an additional mill.

The installation of an additional mill will increase the average capacity and allow for a buffer when a mill is offline. Installation of the mill will meet the requirements of the Dangerous Goods Safety Act 2004.

Building 35 Washer Flocculant Supply

Installation of two new flocculant batching tanks and one process tank

Two new flocculant batching tanks, inclusive of wetting head, agitator and motor. Installation of a new flocculant process tank. Installation will meet the requirements of the Dangerous Goods Safety Act 2004

Building 35 Liquor Filtration

Installation of four diastar filters. Two new mud tanks.

Four new Diastar filters to augment the existing Kelly filters. These are current industry standard for this duty. Installation will meet the requirements of the Dangerous Goods Safety Act 2004

Building 45 Precipitation

Installation of approximately 10 new precipitation tanks, one emergency overflow tank, one cooling tower, one new spent caustic storage tank.

New tanks will be constructed as part of the proposal. Installation will meet the requirements of the Dangerous Goods Safety Act 2004.

Building 49 New product Filtration Building

Installation of three additional disc filters. These are similar to existing seed filters in building 44. Three new repulp tanks and two new filtrate tanks.

New disc filters to prefilter product prior to calcination pan filters. Installation will meet the requirements of the Dangerous Goods Safety Act 2004.

Building 50 Calciner 4 and 5

Replacing key ducts and cyclones and other components within the Calciner to achieve increase capacity. The

Upgrades to Calciner 4 and 5 to match ducts and vessels on existing Calciners 1, 2 and 3. Calciners 1-5 were initially all the same design, however Calciners 1-3


Proposal Components Proposal Scale and Description Electrostatic Precipitator (ESP) will also be upgraded similar to Calciners 1-3.

have previously been upgraded and this proposal aims to duplicate these equipment upgrades on Calciners 4 and 5.

Mud to Lake Pipeline Pipeline diameter for mud to lake pipeline may be upgraded.

The pipeline may be upgraded from a 450mm diameter to 500mm diameter. This would increase the flow of residue slurry to the Residue Storage Area.

Clearing Assessment Overview Alcoa has identified that 0.95 hectares (ha) of clearing will be required for the Proposal. A review of the two proposed clearing areas was conducted to identify the significance of the remnant vegetation within the Proposal area (Mattiske Consulting Pty Ltd, 2018). This assessment is attached in Section 8 of this application. The first area supports a range of planted Eucalyptus, Corymbia and Allocasuarina trees and several Acacia saligna and Melaleuca armillaris shrubs. The Eucalypt species included Eucalyptus rudis, Eucalyptus cypellocarpa, Corymbia citriodora and Eucalyptus resinifera.

The second area surveyed supports a range of planted Eucalyptus and several Acacia, Grevillea and Melaleuca shrubs. The Eucalypt species consists of Eucalyptus rudis, Eucalyptus cypellocarpa, Corymbia citriodora and Eucalyptus resinifera.

Both survey areas consisted of an absence of low understorey species. The trees generally occur on the fringes of sheds and refinery operational areas. There are no wetlands and no apparent use of these planted trees and shrubs by native fauna. The photograph below reflects the degree of disturbance and the lack of understorey.

Photograph 1: Looking northwest of planted trees to storage area and processing refinery area.

A review of the ten clearing principles was undertaken and found that clearing of the proposed area would not be contradictory to the principles as it does not support any threatened flora species, priority flora species or threatened or ecological communities. The ecological values


associated with the area within the Pinjarra Refinery have been modified and degraded for some time as a result of refinery operations and isolated from adjacent remanent bushland areas. The proposed clearing footprint is within the existing refinery. The clearing will be conducted under an exemption allowed under Environmental Protection (Clearing of Native Vegetation) Regulations 2004, specifically Regulation 5, Item 1 – Clearing to construct a building. Refer to Attachment 3B of the areas proposed to be cleared for the project.

Pre-commissioning and Commissioning Pre-commissioning works is associated with system checks, testing and inspections, which is a multidiscipline activity and does not introduce product through the system. Testing may involve use of low alkalinity water and therefore pre-commissioning works has limited potential for environmental emissions. Commissioning is considered as introduction of product through the system and therefore has associated environmental risks. Commissioning of this Proposal will involve tie-ins to the operating refinery, which will have an impact to current refinery operations and therefore the commissioning of infrastructure will occur during periods when operating plant is available. Internal checks will be undertaken to ensure compliance with regulatory requirements. It is proposed that commissioning occurs within the compliance requirements as detailed in the table below. Table 3: Commissioning and Compliance

Infrastructure Commissioning Compliance Building 15 Bauxite Reclaim

Commissioning to occur throughout project construction phase, to support with constructability, implementation and management of the project site and operations. (Note: Systems will be commissioned as available).

Alcoa proposes commissioning to be undertaken without exceeding operating licence limits under L5271/1983/14. Building 25

Milling

Building 35 Washer Flocculant Supply


Building 49 New product Filtration Building


Mud to Lake Pipeline


Alcoa proposes commissioning to be undertaken in accordance with current operating licence conditions for Calciners 1, 2 and 3. Refer to 6A Particulates section.

Refer to the following figure for approximate locations of proposed infrastructure for this proposal.


TIMING

Approximate timing for commissioning to start is included in Table 1 and will develop in a staged manner until the end of the Proposal.

The overall schedule for commissioning is heavily dependent on availability of operating plant and the delivery of long lead items and cannot be accurately scheduled at this time. The Proposal is in early feasibility study and therefore a detailed construction and commissioning schedule is not yet fully available.

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Attachment 3B – Map of Proposed Areas to be cleared

268sqm

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´DATUM GDA 1994, PROJECTION MGA ZONE 50

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AECOM does not warrant the accuracy or completeness of information displayed in this map and any person using it does so at their own risk. AECOM shall bear no responsibility or liability for any errors, faults, defects, or omissions in the information.

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Vegetation to be removed

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1Figure

Building 25 MillingPROJECT ID

APPROVED BYCREATED BY

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LAST MODIFIED 08 MAR 2019

1:500 when printed at A4

Data sources: Landgate SLIP © Imagery (August 2018);Base Data: (c) Based on information provided by andwith the permission of the Western Australian LandInformation Authority trading as Landgate (2010).

ALCOA

Construction Laydown AreaTotal area = 123sqm 76sqm

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Building 35 Liquor FiltrationPROJECT ID


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Construction Laydown AreaTotal area = 4102sqm

Construction Laydown AreaTotal area = 1783sqm

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Total area = 2541sqm

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Plant Wide InfrastructureClearance for ConstructionAccess Road

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Attachment 5

Other Approvals and Community Consultation


PART 7: OTHER APPROVALS AND CONSULTATION

Other Approvals Alcoa has the following approvals in place relevant to the proposal:

• Pinjarra Refinery Efficiency Upgrade Ministerial Statement 646 issued under Part IV of the Environmental Protection Act 1986.

• Operating Licence L5245/1983/14 issued under Part V of the Environmental Protection Act 1986.

• Rights in Water and Irrigation Act 1914 o SWL 98940 o SWL 98937 o SWL 98939 o GWL 98936 o GWL 167867 o GWL 150586

• Alumina Refinery (Pinjarra) Agreement Act 1969

• Dangerous Goods Storage Licence DGS004240 No other approvals have been identified as being required. The refinery’s Dangerous Goods Storage Licence will be amended if necessary.

Community Consultation Alcoa is committed to consulting with all relevant stakeholders and employs both informal and formal consultation methods. Alcoa has discussed the Proposal with the following authorities:

• Department of Water and Environmental Regulation

• Department of Jobs, Tourism, Science and Innovation

• Department of Mines, Industry Regulation and Safety

• Shire of Murray Pinjarra Refinery has a long standing community engagement process through the Community Consultative Network (CCN), which involves community feedback and input. Alcoa discusses a range of issues and activities with through the CCN. This Proposal has been discussed with the CCN group on 6 March 2019. It is intended that Alcoa will continue to undertake further consultation with relevant stakeholders.

Scoping Meeting A pre-scoping and scoping meeting regarding this Proposal has been held with DWER officers. During the meeting, Alcoa outlined the Proposal and discussed the associated environmental risks. The following meetings have been held:


• 19 November 2018 – Meeting with Chris Malley, James Milne and Paul Byrnes.

• 21 February 2019 – Meeting with Chris Malley and James Milne.



Attachment 6A – Emissions and Discharges


PART 9: EMISSIONS, DISCHARGES AND WASTE

The key emissions and discharges from the Proposal are detailed below. Other emissions and discharges have been considered as per Guidance Statement - Risk Assessments, Part V, Division 3, Environmental Protection Act 1986 (February 2017), however the context of the risk is considered low.

9.1. Emissions to Air

9.1.1. Operations Phase On 21 September 2015, an application under Section 45C of the Environmental Protection Act 1986 (the EP Act) to support an incremental increase from 4.2 Mtpa to 5Mtpa was approved as per Ministerial Statement 646 (MS 646). As part of that assessment, emission rates were estimated for a 5Mtpa operational scenario, air dispersion modelling was performed (Air Assessments, 2014) and the Screening Health Risk Assessment was reviewed (ENVIRON, 2014). The amendment authorised emission outputs as detailed in Table 1.

Table 1: Atmospheric Emissions Approved under MS646 Atmospheric Emissions Units Authorised Emissions

Particulates from Stacks Tonnes per annum 140

NOx Tonnes per annum 860

CO Tonnes per annum 900

VOCs Tonnes per annum 162

Greenhouse Gases Tonnes per annum 2,581,700

Net CO2 kgCO2/t alumina 564

Bauxite Residue Mtpa 10

Point source emissions regulated through licence L5217/1983/14 include the Oxalate Kiln Stack, Calciner Stacks (1 – 7) and Boiler Stacks (refer L5271/1983/14, Table 2).

This Proposal does not require any additional point sources to be constructed. Calciners 4 and 5 will be upgraded to be of equivalent capacity to Calciners 1,2 and 3 base design. This will increase the emission rates for calciners 4 and 5. Overall site particulate emissions from stacks will remain within the 140tpa output authorised by MS646. As a result the following documents are relevant to this proposal. These documents can be provided upon request.

• Pinjarra Alumina Refinery Air Quality Modelling for 2014 Health Risk Assessment (Air Assessments, 2014).

• Peer Review Pinjarra Refinery Modelling (Pacific Environment Limited, 2015).

• Revision of Pinjarra Refinery Health Risk Screening Assessment (Environ, 2014).

• Expert Peer Review of Revised Pinjarra Refinery Health Risk Screening Assessment (Weinstein, 2015).

Pinjarra Refinery will continue to manage and monitor air quality using existing procedures and management plans. These will be reviewed and updated as required.


9.1.2. Construction Phase The main emission related to construction phase is fugitive dust emission from civil earthworks and infrastructure construction. Based on the scope and scale of the project, is not anticipated that dust will adversely impact surrounding areas, as the works will be within the existing refinery footprint. Dust management will generally be through utilising existing bituminised areas for vehicle movements, use of water trucks, visual inspection and field audits.

The Pinjarra Refinery will continue to operate in accordance with the conditions in MS646 and L5271/183/14, both of which require Alcoa to monitor and measure dust emissions and to take actions to minimise the generation of airborne dust.

9.2. Noise Emissions

9.2.1. Operations Phase Pinjarra Refinery is required to comply with the Environmental Protection (Noise) Regulations 1997.

Alcoa has undertaken a noise impact assessment of the Proposal (refer to Attachment 8). Predictive modelling conducted as part of the assessment indicates that the Proposal does not significantly change site noise emissions. The results of the modelling are detailed in Table 2. Table 2: Noise Modelling for Proposal Receptors EP (Noise)

Regulations 1997 Assigned Levels

dB(A)

Refinery Base with Filtration

2019

Refinery Base with Filtration and

Reliability Proposal 2019

Impact of Reliability Proposal based on modelling results

Predicted Worst Case Noise Level dB(A)

R1 36 35.9 36.0 +0.1

R2 35 40.7 41.1 +0.4

R3 35 33.5 33.6 +0.1

R4 37 33.3 33.4 +0.1

R5 35 34.1 34.3 +0.2

Within the last 3 years, no noise complaints have been received that related to refinery operations.

9.2.2. Construction Phase Alcoa will implement a construction noise management plan during the construction phase.

9.3. Groundwater It is not anticipated that additional water will be required for construction of the Proposal. Process vessels will be designed, installed and operated to minimise impacts to groundwater through loss of containment. Tanks will be installed in accordance with Dangerous Goods Safety Act 2004. Where practicable, facilities will incorporate elements of AS3780 The storage and handling of corrosive substances and applicable codes of practice. During and post construction testing of vessels will be undertaken (non-destructive testing and or hydrotesting


as required) to validate the integrity of the tanks. Vessels and associated bunding will be operated and maintained in accordance with Alcoa procedures. It is not anticipated that significant risk to groundwater will occur during construction and operation. Any spills during commissioning and operation will be recorded and reported in line with current Alcoa processes.

9.4. Waste Construction waste will be minimised and where practicable recycled. Where waste cannot be recycled, it will be disposed of either to the onsite waste facility or to an offsite licensed facility. Additional residue slurry generated by the Proposal will continued to be directed to the Residue Storage Area (RSA). The following table summarises the potential emissions as part of the Proposal and proposed controls.


Table 3: Potential Emissions and Proposed Controls

Source Potential Emissions

Potential Receptor Proposed Pathway

Proposed Control Emissions Change Anticipated

Construction Emissions to Air • Fairbridge farm • Carcoola Townsite • Pinjarra Town Site • Receptor 5-12

Residence/farmhouse

Air/Wind Dispersion

• Vehicles traversing on existing bituminised areas • Use of water trucks (if required) • Visual inspection • Field audits.

No

Operation Emissions to Air • Fairbridge farm • Carcoola Townsite • Pinjarra Town Site • Receptor 5-12

Residence/farmhouse

Air/Wind Dispersion

• Update relevant procedures and plans related to the management of air emissions

Yes

Construction Noise • Fairbridge farm • Carcoola Townsite • Pinjarra Town Site • Receptor 5-12

Residence/farmhouse

• Implementation of Construction Noise Management Plan • Adoption of universal work practices to reduce noise and

vibration emissions during construction • Selection and maintenance of construction plant and

equipment to minimise noise levels and period of disturbance

• Scheduling of construction works where practicable to avoid noise emissions at sensitive times (e.g. Sundays and public holidays).

•

No

Operation Noise • Fairbridge farm • Carcoola Townsite • Pinjarra Town Site • Receptor 5-12

Residence/farmhouse

• Specifications during design and procurement of noise requirements for noise equipment, where practicable.

• Noise monitoring to validate noise model on completion of Works.

No



Attachment 8 – Additional Information


Flora and Vegetation Assessment 2018

__________________________________________________________________________________

Mattiske Consulting Pty Ltd

Review of Values on the Patches of Remnants within the Pinjarra Refinery area, October 2018

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1. INTRODUCTION

Dr Mattiske was engaged by Alcoa of Australia Limited (Alcoa) to undertake an assessment of two main areas within the Pinjarra Refinery operations to assess the values for flora, vegetation and fauna (see Figures 1 and 2 attached). The site inspection was undertaken by Dr Libby Mattiske (Mattiske Consulting Pty Ltd) with Dennis Lindgren (Alcoa of Australia Limited) on the 9th October 2018.

2. PINJARRA REFINERY

2.1 Soils and Topography

The Swan Coastal Plain comprises five major geomorphological systems that lie parallel to the coast, namely (from west to east) the Quindalup Dunes, Spearwood Dunes, Bassendean Dunes, Pinjarra Plain and Ridge Hill Shelf (Churchward and McArthur 1980; Gibson et al. 1994). Each major system is composed of further subdivisions in the form of detailed geomorphological units (Churchward and McArthur 1980 and Gibson et al. 1994). The Pinjarra Refinery lease area is situated on the Pinjarra Plain geomorphic system. The Pinjarra Plain is an alluvial plain, the older layers of which have been laterized and stripped and generally consist of a sandy surface over a poorly structured sub soil clay (Beard 1981).

2.2 Vegetation

The Pinjarra Refinery was established on former farmlands and as such lies on the Drummond Botanical Sub-district of the South-west Botanical Province (Beard 1979, 1980 and 1990). The Drummond Botanical Subdistrict is characterised by low Banksia woodlands on leached sands, Melaleuca swamps on poorly drained depressions and Eucalyptus gomphocephala (tuart), Eucalyptus marginata (jarrah) and Corymbia calophylla (marri) woodlands on less leached soils (Beard 1990). Regional scale vegetation complex mapping by Heddle et al. (1980) indicates that vegetation associations within the Pinjarra Refinery lease area are likely to belong to two broad vegetation complexes, namely the Guildford Complex and the Forrestfield Complex. A brief description of each vegetation complex is provided below: The Guildford Complex comprises a mixture of open forest to tall open forest of Corymbia calophylla, Eucalyptus wandoo and Eucalyptus marginata and woodland of Eucalyptus wandoo (with rare occurrences of Eucalyptus lane-poolei). Minor components in seasonally wet areas or along watercourses include Eucalyptus rudis and Melaleuca rhaphiophylla.

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The Forrestfield Complex comprises an open forest of Corymbia calophylla, Eucalyptus wandoo and Eucalyptus marginata on the heavier gravelly soils and Eucalyptus marginata, Corymbia calophylla and Allocasuarina fraseriana on sandier soils. This complex is dissected by a series of streams which support fringing woodlands of Eucalyptus rudis and Melaleuca rhaphiophylla. Remnant plant species on gravelly soils include Banksia grandis, Xylomelum occidentale, Banksia sessilis, Macrozamia riedlei, Xanthorrhoea preissii and Hibbertia spp. On the sandier soils there are remnant pockets of the Eucalyptus marginata, Corymbia calophylla and Allocasuarina fraseriana open forest with common species including Banksia attenuata, Banksia grandis, Stirlingia latifolia, Mesomelaena tetragona and Nuytsia floribunda.

2.3 Detailed Vegetation Mapping of the Pinjarra Refinery Lease Area

The Pinjarra Refinery lease area that occurs north-east of Pinjarra is located on the eastern edge of the Swan Coastal Plain and on the Darling Scarp. The survey area lies on the edge of the Drummond and Dale Botanical Sub-districts within the Darling Botanical District of the South-west Botanical Province

(Beard 1979, 1980 and 1990). Vegetation is divided into three broad complexes, defined earlier by Heddle et al. (1980): Guildford. Dominated by a mixture of an open forest, in sections a tall open forest, of marri –

wandoo – jarrah and a woodland of wandoo. Forrestfield. Dominated by an open forest of marri – wandoo – jarrah on the heavier gravelly soils

and of jarrah – marri – sheoak on sandier soils.” Darling Scarp. Vegetation ranges from a low open woodland of wandoo with admixtures of marri,

butter gum (Eucalyptus laeliae) and mountain gum, (Corymbia haematoxylon) through the low open forest of Allocasuarina huegeliana through heath, through herbfields of Borya spp. to lithic complex on the granite rocks.

Mattiske E. M. and Associates (1992) described 19 plant communities within the Pinjarra Refinery lease

area on the Pinjarra farmlands, predominantly woodlands but also forests, heaths and sedgelands. Of these, seven were classified as being of high conservation value and Mattiske and Associates (1992) recommended that these should be managed for conservation of native flora. This information on the flora and vegetation was updated in 2012. In 2015, more detailed studies were also undertaken by the Mattiske team on the conservation category wetlands and associated slopes on the northern sections of the Pinjarra Refinery lease area. In between these major studies there have been smaller tasks associated with definition of flora and vegetation values and current condition of sections of the Pinjarra Refinery area and the adjacent farmlands.

3. RESULTS AND DISCUSSION

The site inspection was undertaken on two areas of the Pinjarra Refinery by Dr Libby Mattiske (Mattiske Consulting Pty Ltd) with Dennis Lindgren (Alcoa of Australia Limited) on the 9th October 2018 (see Figures 1 and 2). This work supplements extensive botanical studies on the Pinjarra Refinery lease areas and the associated farmlands by the Mattiske team over decades (E.M. Mattiske and Associates 1992 to Mattiske Consulting Pty Ltd 2017). . The first of the areas within the Pinjarra Refinery supports a range of planted Eucalyptus,

Corymbia and Allocasuarina trees and several Acacia saligna and Melaleuca armillaris shrubs (Figure 1). The Eucalypt species included Eucalyptus rudis, Eucalyptus cypellocarpa, Corymbia citriodora and Eucalyptus resinifera. Although established trees, there was an absence of low understorey species. The trees occur on the fringes of sheds and refinery operational areas. There are no wetlands and no apparent use of these planted trees and shrubs by native fauna. The series of photographs reflect the degree of disturbance and the lack of understorey and the

proximity to the storage areas and sheds (see Photographs 1 to 3).

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Photograph 1: Looking northeast of planted trees to storage area and processing refinery area (Figure 1)

Photograph 2: Looking southwest to planted trees south of sheds in western section of the area (Figure 1)

Photograph 3: Looking south to Melaleuca shrubs and Eucalypt trees to west of the storage area (Figure 1)

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. The second of the areas within the Pinjarra Refinery supports a range of planted Eucalyptus and several Acacia, Grevillea and Melaleuca shrubs (Figure 2). The Eucalypt species included Eucalyptus rudis, Eucalyptus cypellocarpa, Corymbia citriodora and Eucalyptus resinifera. Although established trees, there was an absence of low understorey species. The trees occur on the fringes of sheds and refinery operational areas. There are no wetlands and no apparent use of these planted trees and shrubs by native fauna. The series of photographs reflect the degree of disturbance and the lack of understorey and the proximity to the storage areas and sheds (see Photographs 4 to 5).

Photograph 4: Looking south along narrow mound with planted Eucalypt trees, Grevillea and Melaleucas next to storage areas (Figure 2)

Photograph 5: Looking south to planted trees on eastern section of the second area (Figure 2)

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4. REVIEW OF 10 CLEARING PRINCIPLES

The observations were reviewed against the 10 clearing principles.

Principle (a): Native vegetation should not be cleared if it comprises a high level of biodiversity. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. Clearing of these trees and shrubs is not at variance with this Principle.

Principle (b): Native vegetation should not be cleared if it comprises the whole or a part of, or is necessary for the maintenance of a significant habitat for fauna indigenous to Western

Australia. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. No fauna activity was observed and due to the proximity of the refinery operational activities it is unlikely to be used regularly by native fauna species. Clearing of these trees and shrubs is not at variance with this Principle.

Principle (c): Native Vegetation should not be cleared if it includes, or is necessary, for the continued existence of rare flora. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. No rare or priority flora was present in the assessed areas. Clearing of these trees and shrubs is not at variance with this Principle.

Principle (d): Native vegetation should not be cleared if it compromises the whole or part of, or is necessary for the maintenance of a threatened ecological community. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. No threatened ecological community occurs within the assessed areas. Clearing of these trees and shrubs is not at variance with this Principle.

Principle (e): Native vegetation should not be cleared if it is significant as a remnant of native vegetation in an area that has been extensively cleared. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. No remnant of native vegetation occurred within the assessed areas. Clearing of these trees and shrubs is not at variance with this Principle. Principle (f): Native vegetation should not be cleared if it is growing in, or in association with, and environment associated with a watercourse or wetland. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. No watercourse or wetland occurred within the assessed areas. Clearing of these trees and shrubs is not at variance with this Principle.

__________________________________________________________________________________


Principle (g): Native vegetation should not be cleared if the clearing of the vegetation is likely to have an impact on the environmental values of any adjacent or nearby conservation area. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. No conservation areas occurred adjacent to or near the assessed areas. Clearing of these trees and shrubs is not at variance with this Principle.

Principle (h): Native vegetation should not be cleared if the clearing of the vegetation is likely to cause appreciable land degradation. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. Clearing is not likely to cause appreciable land degradation.

Clearing of these trees and shrubs is not at variance with this Principle.

Principle (i): Native vegetation should not be cleared if the clearing of the vegetation is likely to cause deterioration in the quality of surface or underground water The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. Clearing is not likely to cause deterioration in the quality of surface or underground water. Clearing of these trees and shrubs is not at variance with this Principle.

Principle (j): Native vegetation should not be cleared if clearing the vegetation is likely to

cause, or exacerbate, the incidence of flooding. The areas within the Pinjarra Refinery consist of planted trees and shrubs and an absence of understorey species. Clearing is not likely to cause, or exacerbate, the incidence of flooding.

5. CONCLUSIONS

In summary, the values associated with the two areas within the Pinjarra Refinery have been modified and degraded for some time as a result of refinery operations and isolation from adjacent remnant bushland areas. Therefore there appears to be sufficient evidence presented to negotiate approval for clearing of these degraded areas (see Section 4 above).

Dr E M Mattiske B.Sc. Hons, Ph.D. 9 November 2018

__________________________________________________________________________________


6. REFERENCES

Balla, S. (1994) Wetlands of the Swan Coastal Plain. Volume 1. Their nature and management. Water Authority

of Western Australia and Western Australian Department of Environmental Protection, Perth Australia.

Beard, J.S. (1980)

A New Phytogeographic Map of Western Australia. Western Australian Herbarium Notes Number 3: 37-58.

Beard, J.S. (1981) Vegetation Survey of Western Australia, Swan. University of Western Australia Press, Nedlands, Western Australia.

Beard, J.S. (1990) Plant Life of Western Australia. Kangaroo Press, Kenthurst NSW. Biosecurity and Agriculture Management Act 2007 Biosecurity and Agriculture Management Regulations 2013 Churchward, H.M. and McArthur, W.M. (1980) Landforms and Soils of the Darling System. In: Atlas of Natural Resources, Darling System,

Western Australia. Department of Conservation and Environment, Western Australia. Department of Biodiversity, Conservation and Attractions (2018a)

Conservation Codes for Western Australian Flora and Fauna. http://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/

Department of Biodiversity, Conservation and Attractions (2018b)

Definitions, Categories and Criteria for Threatened and Priority Ecological Communities. http://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/tecs/

Department of Biodiversity, Conservation and Attractions (2018c)

List of Threatened Ecological Communities endorsed by the Western Australian Minister for the Environment. http://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/

Department of Biodiversity, Conservation and Attractions (2018d)

Priority Ecological Communities for Western Australia. Species and Communities Branch, Department of Parks and Wildlife. http://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/

Department of Biodiversity, Conservation and Attractions (2018e) Florabase, the Western Australian Flora. http://florabase.dpaw.wa.gov.au/

Department of Environment and Conservation (2009)

Protocol for proposing modifications to the Geomorphic Wetlands Swan Coastal Plain dataset. Viewed 29th August 2014. http://www.dec.wa.gov.au/publications/cat_view/805-management-and-protection/815-wetlands/819-wetlands-of-the-swan-coastal-plain.html

Department of Environment and Conservation (2011) Interim Recovery Plan 2011-2016 for Corymbia calophylla – Kingia australis woodlands on

heavy soil, Swan Coastal Plain. Interim Recovery Plan No. 315. Department of Environment and Conservation, Perth.

http://www.dpaw.wa.gov.au/images/documents/plants-animals/threatened-species/Listings/

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Department of Parks and Wildlife (2007-) NatureMap, Mapping Western Australia’s Biodiversity. http://naturemap.dec.wa.gov.au

Department of Parks and Wildlife (2013)

A methodology for the evaluation of specific wetland types on the Swan Coastal Plain, Western Australia, draft trial methodology prepared by the Department of Parks and Wildlife, Perth

Department of the Environment (2011) Australian Wetlands Database, Ramsar wetlands, Peel-Yalgorup System. Viewed 1st September

2014. http://www.environment.gov.au/cgi-bin/wetlands/ramsardetails.pl?refcode=36

Department of the Environment and Energy (2018a)

Australia’s Bioregions (IBRA). http://www.environment.gov.au/parks/nrs/science/pubs/subregions.pdf

Department of the Environment (2018b)

The Ramsar Convention on Wetlands. http://www.environment.gov.au/topics/water/waterourenvironment/wetlands/ramsarconvention-wetlands

Department of the Environment (2018c)

Environment Protection and Biodiversity Conservation Act 1999 List of Threatened Flora. http://www.environment.gov.au/cgi-bin/sprat/public/publicthreatenedlist.pl?wanted=flora

Department of the Environment (2018d)

EPBC Act List of Threatened Ecological Communities. http://www.environment.gov.au/cgi-bin/sprat/public/publiclookupcommunities.pl

Department of Water (2015)

Perth Groundwater Atlas, viewed 5th February 2015. http://www.water.wa.gov.au/idelve/gwa/metadata_statements/geomorph_wetlands.html Environment Australia (2001)

A Directory of Important Wetlands in Australia, Third Edition. Environment Australia, Canberra. Viewed 3rd September 2014 http://www.environment.gov.au/resource/directory-important-wetlands-australia-third-edition

Environment Protection and Biodiversity Conservation Act 1999 Environmental Protection Authority (2004) Guidance for the Assessment of Environmental Factors. Guidance Statement No. 51: Terrestrial

Flora and Vegetation Surveys for Environmental Impact Assessment in Western Australia. Environmental Protection Authority, Perth, 2004.

Environmental Protection Act 1986

Environmental Protection (Clearing of Native Vegetation) Regulations 2004 Hale, J. and Butcher, R. (2007)

Ecological Character Description of the Peel-Yalgorup Ramsar Site, A Report to the Department of Environment and Conservation and the Peel-Harvey Catchment Council, Perth, Western Australia. http://www.dpaw.wa.gov.au/images/documents/conservation-management/wetlands/ramsar/peel-yalgorup-ramsar-site-ecd-with-disclaimer.pdf

Heddle, E.M., Loneragan, O.W., and Havel, J.J. (1980) Vegetation of the Darling System. In: Atlas of Natural Resources, Darling System, Western

Australia. Department of Conservation and Environment, Western Australia Keighery, B. (1994) Bushland Plant Survey. Wildflower Society of Western Australia, Perth.

http://www.environment.gov.au/topics/water/waterourenvironment/wetlands/ramsarconvention-wetlands

http://www.environment.gov.au/topics/water/waterourenvironment/wetlands/ramsarconvention-wetlands

http://www.environment.gov.au/cgi-bin/forms/sprat/public/publicthreatenedlist.pl?wanted=flora

http://www.environment.gov.au/cgi-bin/sprat/public/publiclookupcommunities.pl

http://www.environment.gov.au/resource/directory-important-wetlands-australia-third-edition

http://www.dpaw.wa.gov.au/images/documents/conservation-management/wetlands/ramsar/peel-yalgorup-ramsar-site-ecd-with-disclaimer.pdf

http://www.dpaw.wa.gov.au/images/documents/conservation-management/wetlands/ramsar/peel-yalgorup-ramsar-site-ecd-with-disclaimer.pdf

__________________________________________________________________________________


Landgate (2017) South Coastal Plains Wetlands. Accessed February 2017. Mattiske E.M. and Associates (1992)

Flora and Vegetation of Pinjarra Farmlands. Unpublished report prepared for Alcoa of Australia Ltd

Mattiske Consulting Pty Ltd (2012)

Flora and Vegetation Assessment, Pinjarra Farmlands. Unpublished report prepared for Alcoa World Alumina Australia, December 2012

Mattiske Consulting Pty Ltd (2014)

Level 1 Flora and Vegetation Survey of Pinjarra Farmland Lots 1, 6, 15, 100, 207 & 251. Unpublished report prepared for Alcoa of Australia Limited, July 2014

Mattiske Consulting Pty Ltd (2015) Assessment of Geomorphic Wetland Boundaries – Pinjarra Farmlands. Prepared for Alcoa of

Australia Limited, February 2015. Mattiske Consulting Pty Ltd (2017) Review of Values on the Interface Area between the proposed road alignment on the Pinjarra

Farmlands and the currently classified Environmentally Sensitive Area. Prepared for Alcoa of Australia Limited, March 2017.

Mitchell, D., Williams, K., and Desmond, A. (2002)

Swan Coastal Plain 2 (SWA2 – Swan Coastal Plain subregion). In: A biodiversity audit of Western Australia’s 53 Biogeographical Subregions in 2002. Department of Conservation and Land Management, Perth.

Semeniuk, C.A. (1987) Wetlands of the Darling System – consanguineous wetlands and their distribution in the Darling

System, south Western Australia. Journal of the Royal Society of Western Australia, 70: 69-87. Semeniuk, C.A. and Semeniuk, V. (1995) A geomorphic approach to global classification for inland wetlands. Vegetado 118: 103-124. Water and Rivers Commission (2001)

Position Statement: Wetlands. Perth, WA. Wildlife Conservation Act 1950

CL

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LegendPinjarra_Survey_Areas_20181003Composite_Vegetation_20140520 - lines

Drawn: CAD Resources ~ www.cadresources.com.au Tel: (08) 9246 3242 ~ Fax (08) 9246 3202

Author: E M Mattiske MCPL Ref:

Date: Oct 2018 Rev: A A3CAD Ref: a439_f07_01

Scale: 1:5,000MGA94 (Zone 50)

Figure:

SEGMENT EVEGETATION INVESTIGATION

PINJARRA REFINERY1

0 9 18 m

±Client:

28 Central Road, Kalamunda WA 6076 ~ Tel: 9257 1625 ~ Fax: 9257 1640

Sheet LocationNotesAerial Photography: Landgate (Jan 2017)

CLPL

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Drawn: CAD Resources ~ www.cadresources.com.au Tel: (08) 9246 3242 ~ Fax (08) 9246 3202

Author: E M Mattiske MCPL Ref:

Date: Oct 2018 Rev: A A3CAD Ref: a439_f07_02

Scale: 1:5,000MGA94 (Zone 50)

Figure:

SEGMENT CVEGETATION INVESTIGATION

PINJARRA REFINERY2

0 9 18 m

±Client:

28 Central Road, Kalamunda WA 6076 ~ Tel: 9257 1625 ~ Fax: 9257 1640

Sheet LocationNotesAerial Photography: Landgate (Jan 2017)


Environmental Noise Impact Assessment 2019

Environmental Noise Impact Assessment for Pinjarra Refinery Efficiency Project Prepared for: Alcoa of Australia Doc Ref: 1403401-1-100 Rev: 0 Date: 13 March 2019

Report

Environmental Noise Impact Assessment for Pinjarra Refinery Efficiency Project Report

Wood | Vibration, Dynamics & Noise (VDN) www.woodplc.com/VDN formerly BETA Machinery Analysis and SVT Engineering Consultants

Client

Alcoa of Australia

Document Title

Environmental Noise Impact Assessment for Pinjarra Refinery Efficiency Project

Wood Reference Number Client Reference Number (if applicable)

1403401-1-100 TBC

Contact Jim McLoughlin, Principal Engineer [email protected] Tel: +61 (08) 9489 2021 Wood Vibration, dynamics and noise 432 Murray St Perth, Western Australia Australia, 6000 Tel +61 (08) 9489 2000 www.woodgroup.com/VDN

Revision Date Reason for Issue Prepared Checked Approved

0 13/03/2019 Issued for Use PKL JMc PKL

INTELLECTUAL PROPERTY RIGHTS NOTICE AND DISCLAIMER Wood Group Kenny Australia Pty Ltd, is the owner or the licensee of all intellectual property rights in this document (unless, and to the extent, we have agreed otherwise in a written contract with our client). The content of the document is protected by confidentiality and copyright laws. All such rights are reserved. You may not modify or copy the document or any part of it unless we (or our client, as the case may be) have given you express written consent to do so. If we have given such consent, our status (and that of any identified contributors) as the author(s) of the material in the document must always be acknowledged. You must not use any part of the content of this document for commercial purposes unless we (or our client, in the event that they own intellectual property rights in this document) have given you express wr itten consent for such purposes. This document has been prepared for our client and not for any other person. Only our client may rely upon the contents of this document and then only for such purposes as are specified in the contract between us, pursuant to which this document was prepared. Save as set out in our written contract with our client, neither we nor our subsidiaries or affiliates provide any warranties, guarantees or representations in respect of this document and all liability is expressly disclaimed to the maximum extent permitted by law.

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Executive Summary

This report presents an environmental noise impact assessment of the proposed Pinjarra Refinery Efficiency Project.

This assessment addresses noise associated with the operational phase of the Project.

The existing Pinjarra refinery noise model has been updated and modified to incorporate noise emissions from new and modified equipment associated with the Efficiency Project. The model has been used to predict noise levels at selected noise sensitive receivers surrounding the refinery and the results compared with a base-case scenario. The contribution of noise emissions from new and modified equipment to overall noise levels has also been determined.

The assessment found that noise emissions from the Project do not contribute to any exceedances of the assigned levels at noise sensitive receptors in the vicinity of the refinery, in accordance with the requirements of the Environmental Protection (Noise) Regulations 1997.

The contribution of Project related noise emitting equipment to overall noise levels is significantly below base-case noise levels and does not result in a discernible change in noise received at the selected receptors.

The Efficiency Project design is yet to be finalised. If future design changes result in additional and / or noisier equipment, noise impacts can still be minimised by implementing remedial noise controls to either existing or Project related equipment.




Revision History (Optional)

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P.K. Lim

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P.K. Lim



1403401-1-100 Rev 0 | March 2019 Page 5 of 63

Table of Contents

1.0 Introduction ....................................................................................................................... 8

1.1 Project Description ............................................................................................................... 8

1.2 Project Noise Objectives ...................................................................................................... 9

1.3 Objectives and Scope of Assessment ................................................................................... 9

1.3.1 Assessment Objectives ....................................................................................................... 9

1.3.2 Scope of Assessment ........................................................................................................ 11

1.4 Applicable Documents........................................................................................................ 11

1.4.1 Project Design Documents and Other Information Provided by Alcoa ................................ 11

2.0 Assessment Methodology .............................................................................................. 12

3.0 Summary of Relevant Legislation .................................................................................. 13

3.1 Environmental Protection (Noise) Regulations 1997 ...................................................... 13

3.2 Assigned Levels for Selected Receptors ............................................................................. 14

3.3 Adjustments for Intrusive Characteristics ............................................................................ 16

4.0 Ambient Noise Monitoring .............................................................................................. 17

5.0 Noise Modelling Methodology ........................................................................................ 18

5.1 Noise Model Program......................................................................................................... 18

5.2 Noise Model Algorithm ....................................................................................................... 18

5.3 Selection of Meteorological Conditions ............................................................................... 18

5.4 Ground Topography, Buildings and Barriers ....................................................................... 19

5.5 Noise Sources ................................................................................................................... 19

5.5.1 Stockpile and Milling (Areas 15 and 25) ............................................................................. 20

5.5.2 Digestion (Area 30) ............................................................................................................ 21

5.5.3 Spent Liquor Pumping (Area 30A) ..................................................................................... 21

5.5.4 Mud to Lake (Area 34) ....................................................................................................... 21

5.5.5 Mud Washing and Filtration (Areas 35) .............................................................................. 22

5.5.6 Oxalate (Area 37) .............................................................................................................. 23

5.5.7 Heat Exchange (Area 40) .................................................................................................. 24

5.5.8 Product/ Seed Filtration (Area 44) ..................................................................................... 24

5.5.9 Precipitation (Area 45) ....................................................................................................... 25

5.5.10 Calcination (Area 50C) ...................................................................................................... 26

6.0 Modelling Results ............................................................................................................ 27

7.0 Noise Impact of Efficiency Project ................................................................................. 28


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7.1 Compliance Assessment .................................................................................................... 28

7.2 Intrusive or Dominant Noise Characteristics ........................................................................ 28

7.3 Discussion ......................................................................................................................... 28

8.0 Construction Noise ......................................................................................................... 30

8.1 Noise Management Requirements for Daytime Construction Activities ................................ 30

8.2 Noise Management Requirements for Out of Hours Construction Activities ......................... 30

9.0 Conclusion ....................................................................................................................... 32

Appendix A Noise Source Sound Power Level ....................................................................... 33

A.1 Efficiency Project Sources ...................................................................................... 33

A.2 Existing Refinery, Residue Area and Filtration Plant Sources ................................. 37

Appendix B Noise Contours .................................................................................................... 62


1403401-1-100 Rev 0 | March 2019 Page 7 of 63

List of Figures Figure 1-1 : Location of Alcoa’s Pinjarra Refinery............................................................................ 8

Figure 1-2 : Layout of Proposed Facilities ..................................................................................... 10

Figure 3-1 : Location of Selected Receptors Surrounding Pinjarra Refinery .................................. 15

Figure B-1 : Worst-Case Night-Time Predicted Noise Levels for the Base Case Model ................ 62

Figure B-2 : Worst-Case Night-Time Predicted Noise Levels for the Efficiency Project ................. 63

List of Tables Table 3-1 : Assigned Levels .......................................................................................................... 14

Table 3-2 : Co-ordinates of Selected Receptors ............................................................................ 15

Table 3-3 : Assigned Levels at Selected Receptors Surrounding Pinjarra Refinery ....................... 16

Table 3-4 : Adjustments for Intrusive or Dominant Noise Characteristics ...................................... 16

Table 4-1 : Highest Recorded Refinery Noise Emissions .............................................................. 17

Table 5-1 : Noise Model Meteorological Inputs for Worst-Case Conditions ................................... 19

Table 6-1 : Worst-case Predicted Noise Levels ............................................................................. 27

Table A-1 : Efficiency Project Equipment Sound Power Levels for New or Modified Equipment .... 33

Table A-2 :Existing Refinery, Residue Area and Filtration Plant Equipment Sound Power Levels . 37


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1.0 Introduction

Alcoa’s Pinjarra Alumina Refinery processes bauxite into alumina using the Bayer process. The refinery consists of alumina processing and residue storage areas. The Pinjarra refinery is located at the foot of a scarp, between the town of Pinjarra and the Darling Range. The centre of the Pinjarra refinery is located approximately 7 kilometres east of the Pinjarra town centre. The Pinjarra refinery extends approximately 4 km in an east-west direction and 3.3 km in a north-south direction.

Figure 1-1 presents an aerial view showing the respective locations of the town and refinery.

Figure 1-1 : Location of Alcoa’s Pinjarra Refinery

The Pinjarra Efficiency Project (the Project) is a brownfields project involving modifications in several areas of the existing refinery to increase throughput by up to an additional 1000 tonnes per day.

This report presents an environmental noise impact assessment of the Project in terms of its contribution to noise received at neighbouring residential receptors.

1.1 Project Description

Major works associated with the Project with potential noise impacts include:

− Addition of a new Semi-autogenous Grinding (SAG) mill; − A new bank of precipitators with three stages of cooling; − Upgrades to bauxite conveyor drive motors and gearboxes; − A new bucket wheel reclaimer;


1403401-1-100 Rev 0 | March 2019 Page 9 of 63

− Upgrades to calcination units; and − New and upgraded pumps, motors and gearboxes at various locations throughout

the refinery.

The plant areas affected by the Efficiency Project are indicated in Figure 1-2.

Further details of the proposed modifications associated with the Project are provided in section 5.5.

As part of the Efficiency Project, a number of equipment items will be upgraded within the existing refinery to cater to the required changes for the project. Upgrades of existing noisy equipment (e.g. conveyor drives, replacement of an old reclaimer with a new unit, etc.) provides opportunities for improvement in some areas with the replacement of older equipment with newer more efficient units. (Refer section 5.5.)

In some other areas, equipment will be shut-down/ placed under care and maintenance (e.g. 35C washer tanks) as they are no longer required for refinery operation. These changes are expected to offset noise emissions from new equipment/ noise sources proposed for the project.

1.2 Project Noise Objectives

Alcoa’s noise objectives for The Project are:

1) to ensure that noise emissions associated with the proposed modifications do not contribute to exceedances of the assigned levels prescribed by the Environmental Protection (Noise) Regulations 1997, at nominated receptors; and

2) to manage noise emissions to minimise the likelihood of complaints during exempt activities.

1.3 Objectives and Scope of Assessment

1.3.1 Assessment Objectives

The objectives of this assessment are:

− to quantify the predicted noise impacts associated with the Project; − to assess predicted noise levels against the assigned levels specified by the

Environmental Protection (Noise) Regulations 1997 at nominated receptor locations; and

− where appropriate, to identify noise mitigation measures to achieve compliance with the Project noise objectives.

.


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Figure 1-2 : Layout of Proposed Facilities


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1.3.2 Scope of Assessment

This assessment addresses noise associated with the operational phase of the Project. Rail and construction noise impacts are excluded.

The results of noise monitoring undertaken at nearby noise sensitive receptors during the winter of 2018 has been used as a measurement baseline to supplement noise modelling.

1.4 Applicable Documents

The following documents are relevant to this assessment:

− Environmental Protection (Noise) Regulations 1997. − Pinjarra Refinery Noise Model Design and Verification, Wood Report 1403232-4-

100, Feb 2019. − Draft Guideline on Environmental Noise for Prescribed Premises, Department of

Environment Regulation, May 2016.

1.4.1 Project Design Documents and Other Information Provided by Alcoa

The following project design documents and other sources of information were provided by Alcoa and were used for this study:

− Pinjarra Future Growth Project FEL 2 - Noise Management and Mitigation Scope of Work (Doc. No.: GC-ALCOA-000028-PIN04-Noise Model SOW RevA);

− Proposed Growth Project Scopes Plot Plan (Doc. No.: GC-ALCOA-000028-Refinery Plot Plan Update Rev B);

− List of Major Equipment Items (Doc. Ref.: List of Major Equipment Emission Noise).

Minor changes to the information provided in the documents listed above resulting from the iterative design process have been implemented in the noise model following discussion with the project engineering team. The results presented in this report are based on the most up-to-date design information available at the time of writing.


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2.0 Assessment Methodology

The existing noise model for the Pinjarra refinery has been updated to reflect current source emission levels, including remedial noise controls on Mill #2. This updated model has been further modified to include the most up to date noise emission data associated with the Residue Filtration project (Wood Doc. No.: 1402387-7-200 RevA 16 July 2018) currently under construction to serve as the base case model for the Efficiency Project.

A Project noise model has been developed from the base case model which incorporates the changes associated with the Efficiency Project.

The Project noise model has been used to determine the Project’s contribution to received noise levels, the change in predicted noise levels at selected noise sensitive receptors compared to the base case, and to determine what, if any, noise controls are required to achieve the Project noise objectives.

All noise level predictions represent worst-case, night-time conditions for sound propagation.

Noise model predictions have been reviewed in the context of monitored ambient noise levels to assess the impact of noise level increases over existing ambient levels, to enable the assessment of audibility of project noise emissions, and to identify the likelihood of project related noise emissions causing or contributing to exceedances of the assigned levels at nearby receptors.


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3.0 Summary of Relevant Legislation

3.1 Environmental Protection (Noise) Regulations 1997

Noise management in Western Australia is implemented through the Environmental Protection (Noise) Regulations 1997 (the regulations) which operate under the Environmental

Protection Act 1986. The Regulations specify maximum noise levels (assigned levels) which are the highest noise levels that can be received at noise-sensitive premises, commercial and industrial premises. Table 3-1 presents the assigned noise levels.

Assigned levels have been set differently for noise sensitive premises, commercial premises, and industrial premises. For noise sensitive premises, e.g. residences, an “influencing factor” is incorporated into the assigned noise levels. The influencing factor depends on land use zonings within circles of 100 m and 450 m radius from the noise receiver, including:

− the proportion of industrial land use zonings; − the proportion of commercial zonings; and − the presence of major or secondary roads.

For noise sensitive residences, the time of day also affects the assigned levels.

The regulations define three types of assigned noise level:

− LAmax assigned level means a noise level which is not to be exceeded at any time; − LA1 assigned level which is not to be exceeded for more than 1% of the time; − LA10 assigned level which is not to be exceeded for more than 10% of the time.

The LA10 noise limit is the most significant for this study since this is representative of continuous noise emissions from the Pinjarra refinery.


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Table 3-1 : Assigned Levels

Type of premises receiving noise

Time of Day Assigned Level (dB)

LA10 LA1 LAmax

Noise sensitive premises: highly sensitive area

0700 to 1900 hours Monday to Saturday

45 +

Influencing factor

55 +

Influencing factor

65 +

Influencing factor

0900 to 1900 hours Sunday and public holidays

40 +

Influencing factor

50 +

Influencing factor

65 +

Influencing factor

1900 to 2200 hours all days

40 +

Influencing factor

50 +

Influencing factor

55 +

Influencing factor

2200 hours on any day to 0700 hours Monday to

Saturday and 0900 hours Sunday and public holidays

35 +

Influencing factor

45 +

Influencing factor

55 +

Influencing factor

Noise sensitive premises: any area other than highly

sensitive area

All hours 60 75 80

Commercial premises All hours 60 75 80

Industrial premises All hours 65 80 90

3.2 Assigned Levels for Selected Receptors

Five representative receptor locations have been identified (Refer to Figure 3-1 and Table 3-2).


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Figure 3-1 : Location of Selected Receptors Surrounding Pinjarra Refinery

Table 3-2 : Co-ordinates of Selected Receptors Receptor Coordinates

R1 32° 40.948'S, 115° 57.152'E

R2 32° 37.069'S, 115° 58.200'E

R3 32° 36.627'S, 115° 53.898'E

R4 32° 37.522'S, 115° 52.828'E

R5 32° 38.200'S, 115° 52.803'E

A portion of the land within 450 m of Receiver 1 is zoned as Industrial resulting in a 1 dB influencing factor.

The South Western Highway is classified as a secondary road, while traffic flows on other nearby roads are insufficient to be classified as either major or secondary roads. Receptor 4 (R4) has a transport factor of 2 dB because it is less than 100 m away from the South Western Highway.

The influencing factor at receptors 2, 3 and 5 is 0 dB.


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Table 3-3 presents the assigned levels, including influencing factors, at the selected receptors.

Table 3-3 : Assigned Levels at Selected Receptors Surrounding Pinjarra Refinery

Time of Day Assigned Level – LA10 dB(A)

R1 R2 R3 R4 R5

0700 to 1900 hours Monday to Saturday

46 45 45 47 45

0900 to 1900 hours Sunday and public holidays

41 40 40 42 40

1900 to 2200 hours all days 41 40 40 42 40

2200 hours on any day to 0700 hours Monday to Saturday and 0900 hours Sunday and public

holidays

36 35 35 37 35

3.3 Adjustments for Intrusive Characteristics

Received noise levels associated with refinery operations must be adjusted if the noise exhibits intrusive or dominant characteristics, i.e. if the noise is impulsive (e.g. banging), tonal (e.g. whining noise having a defined pitch) or modulating (e.g. noise which varies cyclically in either pitch or amplitude). Table 3-4 presents the adjustments required when intrusive or dominant characteristics cannot be reasonably and practicably removed. The adjusted noise levels must now comply with the assigned noise levels. Regulation 9 sets out objective tests to assess whether the noise is taken to be free of these characteristics.

Table 3-4 : Adjustments for Intrusive or Dominant Noise Characteristics

Adjustment where noise emission is not music

these adjustments are cumulative to a maximum of 15 dB

Where tonality is present Where modulation is present Where impulsiveness is present

+5 dB +5 dB +10 dB


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4.0 Ambient Noise Monitoring

Unattended noise monitoring was undertaken during August and September 2018 at locations R1 to R5. The monitoring was scheduled to coincide with weather conditions enhancing sound propagation towards the relevant receptors. Five monitors were deployed for a period of over two weeks. The logged data was screened to identify the nights when noise emissions from the refinery were highest. The data recorded on these nights was analysed in detail using a filtering processes which included review of audio recordings to remove extraneous noise as far as practical. The remaining data was analysed to determine the LAS10 levels over a 3 hour assessment period. The highest levels recorded at each location are presented in Table 4-1.

Table 4-1 : Highest Recorded Refinery Noise Emissions

Monitoring Location LAS10(3hr)

R1 34.8

R2 41.9

R3 33.7

R4 30.9

R5 36.3

The results indicate exceedances of the assigned levels at locations R2 and R5.


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5.0 Noise Modelling Methodology

5.1 Noise Model Program

A computer noise model has been developed for the Pinjarra Refinery using SoundPlan noise modelling software which has been previously accepted by WA Department of Water and Environmental Regulation (DWER) as appropriate for environmental noise prediction.

The inputs required in SoundPlan are noise source data, barriers/screens, ground topographical and absorption type data, assessed meteorological conditions and receiver point locations.

The model has been used to generate predicted noise contours for the area surrounding the refinery and to predict noise levels at the selected noise sensitive receptors.

The model does not include noise emissions from any sources other than those at the Pinjarra Refinery, its residue operations and the filtration plant currently under construction. Noise emissions from other neighbouring industrial sources, road traffic, aircrafts, animals, domestic sources, etc. are excluded from the modelling.

5.2 Noise Model Algorithm

SoundPlan provides a range of published noise propagation prediction algorithms that can be selected by the user. The CONCAWE1,2 prediction algorithms were selected for consistency with previous modelling undertaken for Alcoa.

The CONCAWE algorithms are also recommended by the WA Department of Water and Environment Regulation (DWER) Draft Guideline3.

5.3 Selection of Meteorological Conditions

SoundPlan calculates predicted noise levels for defined meteorological conditions. In particular, the following variables are included in the prediction algorithms and will affect the predicted noise level: temperature; Pasquill stability (temperature inversion); relative humidity; wind speed; and wind direction.

1 CONCAWE (Conservation of Clean Air and Water in Europe) was established in 1963 by a group of oil companies to carry out research on environmental issues relevant to the oil industry. 2 The propagation of noise from petroleum and petrochemical complexes to neighbouring communities, CONCAWE Report 4/81, 1981 3 Draft Guideline on Environmental Noise for Prescribed Premises, May 2016, DWER2015/001319, Department of Water and Environment Regulation


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The night-time “default meteorological conditions” as suggested by the WA DWER Draft Guideline have been used to determine the worst-case overall predicted noise levels at each selected noise sensitive receiving location (See Table 5-1).

Table 5-1 : Noise Model Meteorological Inputs for Worst-Case Conditions

Temperature Pasquill Stability Wind speed Wind Direction Relative

Humidity

15 ºC Pasquill Stability F 3 m/s Worst-case (source to receiver) 50%

5.4 Ground Topography, Buildings and Barriers

Ground elevation data (topography) was supplied by Alcoa during the 2012 model build and has not changed. Topography for the residue area was supplied at 1m contour line spacing, whereas the topography for the refinery and surrounding lands was supplied at 5m spacing. The increased resolution of the contours in the residue area is appropriate due to the localised shielding effects provided by the bunding in this area.

At the residue disposal area, all the dams and bunds for impoundments and water storage facilities have been incorporated into the ground contours.

The acoustic barrier effects and reflections due to existing structures (e.g. buildings, tanks) have been included in the model where the potential influence on the modelled noise levels is considered to be significant.

The following ground absorption factors were used in the model:

• A ground factor of 0.3 has been used for the majority of the flat ground surrounding the refinery.

• More hilly and dense bushland to the east of the refinery has been modelled with a ground factor of 0.8.

• Compacted ground in the residue area has been modelled as at 0.2. • The Refinery area has been modelled with a ground factor of 0.15 to represent the

combination of asphalt, concrete, dirt and foliage. • Partially filled tails ponds have been modelled as 0.1. The stockyard has been modelled

at 0.4. • A reflective ground (ground factor 0) has been used for propagation over water.

5.5 Noise Sources

Details of the project noise sources and assumptions are provided in the following sections of this report. Table A-1 in Appendix A summarises the sound power levels assumed for Efficiency Project noise sources (new or modified) in the model. A summary of the source sound power levels for the other elements of the existing refinery and residue area operations


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is summarised in Table A-2 in Appendix A.

Sound power levels for new and upgraded equipment have been assumed to be in line with industry standards and are for the most part based on measured sound power levels for similar equipment at Alcoa’s refineries. Where available, recently installed equipment has been used as a reference as this is generally quieter than older equipment. Where recently installed equipment was not available as a reference noise reductions of up to 6 dB have been assumed compared to the measured levels to account differences in equipment sizes / power ratings, age and condition.

5.5.1 Stockpile and Milling (Areas 15 and 25)

Bauxite Feed Conveyors B1, B2 and C1

The drives for conveyors B1, B2 and C1 (motors and gearboxes) will be upgraded to handle the projected increase in throughput. A sound power level of 105 dB(A) has been assumed for the upgraded drives based on sound power levels recorded in 2018 for similar drives in the Pinjarra stockpile area.

Bauxite Storage Bin

The bauxite storage bin will feature a new apron feeder. A sound power level of 105 dB(A) has been assumed for the apron feeder hydraulic drive based on measurements recorded in 2018 for similar equipment at the refinery but, again, reduced by 3 dB to account for the age and condition of the measured drive.

Bridge Bucket Wheel Reclaimer

The existing bucket wheel reclaimer #1 will be replaced with a new reclaimer with no anticipated net change in noise emissions. The sound power levels assumed for the new reclaimer’s individual components are as follows:

• New Reclaimer Conveyor – 100.1 dB(A);

• New Reclaimer Bucket – 103 dB(A);

• New Reclaimer Bucket Conveyor – 93 dB(A);

• New Reclaimer Bucket Drive Motor – 106 dB(A);

• New Reclaimer Bucket to Chute Conveyor – 100 dB(A);

• New Reclaimer Transfer Chute – 107.1 dB(A);

• New Reclaimer Winch and Drive Motor – 104 dB(A).

The total combined sound power level of the new bucket wheel reclaimer is assumed to be 112 dB(A) and is based on the sound power level of the current reclaimers.


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SAG Mill

A new SAG mill and associated slurry and discharge pumps (two duty and two standby) are proposed for the Project. A sound power level of 112 dB(A) has been assumed for the new mill based on measurements recorded in 2018 for the existing mill #7. The breakdown of the components for the new mill and their assigned sound power levels are as follows:

• New Mill Filtering Cleaner System Blower Exhaust - 107.4 dB(A);

• New Mill Fan - 98.1 dB(A)

• New Mill Fan Motor - 95.5 dB(A)

• New Mill Lower Door - 109.6 dB(A)

• New Mill Lube System Cooler Fan – 90 dB(A)

Two pumps have been included in the noise model, representing the operating slurry and discharge pumps, each with a sound power level of 94 dB(A) based on a 315 kW pump motor.

The new mill has been modelled as operational along with all other mills within the refinery. This is considered a worst-case scenario for mill operations as a lower number of mills will normally be operational.

Area 25A

Eight existing pumps on the slurry storage tanks in this area will be upgraded to 280 kW motors. Four of these pumps have been modelled as normally operating within the model with an assigned sound power level of 96.6 dB(A) each.

5.5.2 Digestion (Area 30)

Ten digester Continuous Regenerative Digester (CRD) condensate pumps will be upgraded as part of the Efficiency Project. The new pumps have been assigned a sound power level of 97 dB(A) assuming a rated power of 315 kW.

5.5.3 Spent Liquor Pumping (Area 30A)

Two Liquor to Mills Pumps will be upgraded as part of the project. The assumed sound power levels for these pumps are 98 dB(A) and have been based on the kW rating for the proposed pump.

5.5.4 Mud to Lake (Area 34)

Sand Removal Rakes

Thirty two motors and gearboxes are to be upgraded at the sand removal rakes as part of the project. The new rake motors and gearboxes have been modelled using an assumed value of 90 dB(A) based on the average sound power levels of the units being upgraded and


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a 3 dB reduction from the average to account for size, age and condition of the drives.

Classifier Overflow (COT) Pumps

Sixteen classifier overflow pumps will be replaced with larger capacity pumps. Post replacement, their operation will see a reduction from ten units previously to five units post Efficiency Project implementation. The assumed sound power level for these pumps have been assumed to be 98 dB(A).

5.5.5 Mud Washing and Filtration (Areas 35)

Area 35A

Eleven green liquor pumps will be upgraded in Area 35A. A sound power level of 97 dB(A) has been assigned to these pumps assuming 315 kW rated power.

Two liquor to mills pumps in this area is also expected to be upgraded along with 2 balancing pumps. These pumps have been assigned a sound power level of 97 dB(A) based on similar pump types within the refinery.

Area 35C

Upgrades are proposed for twelve washer underflow pumps, twelve washer overflow pumps and one overflow return pump. A sound power level of 95 dB(A) has been assumed for each upgraded pump. This represents a reduction of approximately 2 – 3 dB compared to the existing pumps due to age and condition and is based on measurements recorded in 2018 of recently installed, similar sized pumps within the refinery. Eleven out of twenty-five washers have been modelled as operating.

A further nine tanks will be placed under care and maintenance and will not be normally operational4. Eighteen pump sets servicing these tanks have been removed from the model as part of the Efficiency Project scenarios. The tanks have been retained in the model to account for their barrier effect.

Area 35D

Three units of 35D5/6 pump system will be upgraded as part of the project to a rated power of 500 kW with two units normally operating. These pumps have been assigned a sound power level of 98.6 dB(A) based on their rated power.

Area 35E

Four new pumps will replace those currently existing in this location and will see an increase in power to 315 kW from the current 185 kW. The sound power level assigned to the new pumps are 97 dB(A). All four pumps have been modelled as operational in the model.

4 These tanks are currently not expected to return to service. If a future operational need arises, the ‘additional’ contribution from the equipment associated with these tanks will be separately assessed as part of the required future modification to refinery operations.


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Area 35F

Eighteen underflow pumps in this area has been earmarked to undergo upgrades to 110 kW motors. These have been modelled as nine normally operating units within the model with a sound power of 93.3 dB(A).

Area 35H

Two new overflow return pump (rated power - 450 kW) will be installed as part of the upgrades in this area. These pumps have been modelled as one unit normally operating and have been assigned a sound power level of 95 dB(A)

Area 35L

Two pumps in this area will be upgraded to a rated power of 315 kW with one unit normally operating. This pump has been assigned a sound power level of 97 dB(A).

Area 35M

Two new flocculant batching tanks with wetting heads, agitators and motor will be installed at this location. The flocculant agitators have been assigned a sound power level of 88.8 dB(A). Also to be installed at this area will be one new screw feeder (& associated blower) and two new flocculant transfer pumps. These sources have been assigned 109.4 dB(A) and 97 dB(A) sound power levels respectively.

Area 35X

The following new equipment is proposed for area 35X:

• Four unitised mud dump pumps (98 dB(A)),

• Two mud mixing tank pumps (one duty and one standby, 93 dB(A)),

• Four agitators for the mud dump tanks (85 dB(A)),

• One agitator for the mud mixing tank (90 dB(A)); and

• Two units of Diastar Feed Boost Pump (one duty/ one standby) with an assigned sound power level of 97 dB(A).

5.5.6 Oxalate (Area 37)

Oxalate Plug Flow Reactor Feed Pumps

Four oxalate plug flow reactor feed pumps will be upgraded as part of the project. The assumed sound power levels of these pump are 96 dB(A) and are conservatively based on a 300 kW pump motor being used.

Biological Oxalate Destruction Tank Agitator

A new oxalate destruction tank agitator will be installed as part of an existing refinery project. The sound power level for this agitator is assumed to be 93 dB(A) based on the kW rating for


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the agitator. The barrier effect of the tank is also included in the model.

Biological Oxalate Destruction Pump

A new oxalate destruction pump will be installed as part of an existing refinery project. The sound power level for this pump is assumed to be 93 dB(A) based on the kW rating for the pump.

5.5.7 Heat Exchange (Area 40)

Five new spent liquor pumps are proposed for area 40 and a sound power level of 98 dB(A) has been assumed for these pumps based on a power rating of 315 kW.

5.5.8 Product/ Seed Filtration (Area 44)

Changes to this area from the Efficiency Project will see the following new equipment being installed:

• Three new filter drives (45 kW, two normally operating) at a sound power level of 98.8 dB(A);

• Three new repulp pumps (500 kW, two normally operating) at a sound power level of 98.6;

• Three new agitators (30 kW, two normally operating) at a sound power level of 88.8 dB(A);

• Three vacuum pumps (315 kW, two normally operating) at a sound power level of 97 dB(A);

• One blow snap air compressor at a sound power level of 100.2 dB(A);

• Three extraction fans (30 kW, two normally operating) at a sound power level of 88.8 dB(A);

• Two filtrate pumps (315 kW, one normally operating) at a sound power level of 97 dB(A);

• Two caustic wash pumps (110 kW, one normally operating) at sound power level of 93.3 dB(A);

• Two seal water pumps (75 kW, one normally operating) at a sound power level of 92 dB(A); and

• Three filter air blowers (185 kW, two normally operating) at sound power level of 95.1 dB(A).


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5.5.9 Precipitation (Area 45)

Changes to the precipitation area include the addition of a new bank of ten precipitation tanks, a run-down/ emergency overflow tank, and a caustic wash tank. All tanks have been included as barriers in the model.

Agitators

The noise model includes noise sources representing each of the drives for the ten precipitation tanks, the run-down/ emergency overflow and caustic wash tanks. Each has an assumed sound power level of 93 dB(A) based on typical levels for the existing agitator drives at the Pinjarra refinery.

Precipitation Pump-Off Pump

A single new precipitation pump-off pump is included in the noise model with an estimated sound power level of 96 dB(A) based on the kW rating of the proposed pump.

Coarse Seed Pumps

The Project includes two new coarse seed pumps (one duty, and one standby). The noise model includes a single noise source representing the duty pump with an estimated sound power level of 96 dB(A) based on the kW rating of the proposed pump.

Interstage Slurry Cooler Feed Pumps

The noise model includes six new interstage slurry cooler feed pumps, each with a sound power level of 102 dB(A) based on measurements of the primary cooler feed pumps at the Wagerup refinery.

Cleaning Liquor Recirculation Pumps

The noise model includes four new cleaning liquor recirculation pumps, each with a sound power level of 93 dB(A) estimated from the size of the proposed pumps.

Cooling Water Pumps

The Project includes two new cooling water pumps (one duty only). The noise model includes a single noise source representing the duty pump with an estimated sound power level of 98 dB(A) based on similar pumps installed at the refinery but reduced by 3 dB to account for the age and condition of the existing equipment.

Green Liquor Pumps (Area 45A)

Two new green liquor pumps are expected to be installed as part of the Efficiency Project and will be rated at 315 kW. These pumps have been assigned a sound power level of 98.8 dB(A) based on their rated power and have been modelled as one unit normally operating.


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Tray Thickener Underflow Pumps (Area 45D)

Tray thickeners underflow pumps will be upgraded to allow one pump unit serving one tray thickener. The assumed sound powers for the pumps is 93 dB(A) and is based on a 100 kW pump motor.

Hydrate Transfer to Calcination (Area 45H)

Six hydrate transfer pumps are expected to be upgraded as part of the project. The assumed sound power levels of these pump are 96 dB(A) based on a 300 kW pump motor being used with 3 units being normally operational.

Cooling Tower Fan (Area 45T)

A new cooling tower fan is proposed to be installed at Area 45T with a rated power of 150kW. This source has been assigned a sound power level of 98 dB(A).

5.5.10 Calcination (Area 50C)

Area 50C will see the following changes implemented as part of the Efficiency Project:

Cyclones

Cyclone 1 will be fully replaced as part of the project. Cyclones 2, 5, 6 and 7 will undergo partial replacement of the areas above the cone only. The noise levels emitted from the cyclone body is not expected to be a significant noise emitter and has been excluded from the model. A new pump motor for Cyclone 1 have been assigned a sound power level of 80 dB(A).

PD Blowers

It is anticipated a total of two new hydrate conveying blowers will be installed along with four new blowers. The assumed sound power level for the hydrate conveying piping is 100 dB(A) while each air blower unit is split into the blower units and its air supply/ ducting. The sound power for the air blower unit is assumed to be 92 dB(A) and 100 dB(A) for the air supply/ ducting.


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6.0 Modelling Results

Table 6-1 presents the predicted noise levels under the worst-case night-time weather conditions defined in “Draft Guideline on Environmental Noise for Prescribed Premises” at each of the selected receptors for the base case noise model and for the Project noise model. The contribution of the Project to overall predicted noise levels is also provided. Predicted levels which exceed the assigned levels are highlighted in bold text. Noise contours are presented in Figure B-1 and Figure B-2 in Appendix B.

Table 6-1 : Worst-case Predicted Noise Levels

Item Scenario Description

Worst Case Predicted Noise Level at Selected Receptor dB(A)

R1 R2 R3 R4 R5

Night-time LA10 Assigned Levels 36 35 35 37 35

A Base Case

Model Existing refinery + filtration

project 35.9 40.7 33.5 33.3 34.1

B Efficiency

Project Model

Base case (A) + new and modified efficiency project

noise sources 36.0 41.1 33.6 33.4 34.3

C Efficiency

Project Contribution

Contribution of new and modified efficiency project

noise sources 16.6 29.5 17.3 16.6 18.3


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7.0 Noise Impact of Efficiency Project

The results presented in Table 6-1 demonstrate that the Efficiency Project has minimal effect on received noise levels at the selected receptors. The noise levels predicted for new and modified equipment associated with the Project (item C in the table above) are 12 dB to 20 dB below the base case noise model predictions and predicted changes in overall levels are 0.4 dB or less.

Furthermore, the noise levels predicted for Project equipment are also significantly below the monitored ambient levels presented in section 4.0. It can be concluded, therefore that there will be no discernible change in noise impacts at noise sensitive receptors.

7.1 Compliance Assessment

Predicted noise levels at four of the five selected receptors do not exceed the most stringent night-time assigned levels. Predicted levels exceed the evening and night-time assigned levels at location R2, however the contribution of the Efficiency Project at this location is some 12 dB below the overall predicted level.

The predicted level at location R5 is below the assigned level, however noise monitoring has shown that measured levels can exceed the night-time assigned level (See Section 4.0). The contribution of the Efficiency Project at this location is some 19 dB below the ambient level measured at this location.

These findings clearly indicate that new and modified equipment associated with the Project does not contribute to any exceedance of the assigned levels. Predicted noise levels at all selected receptors do not exceed the assigned levels during day time or evening periods.

7.2 Intrusive or Dominant Noise Characteristics

The contribution of the Efficiency Project to overall predicted noise levels is significantly below the base case noise model predictions and monitored ambient levels. Therefore, any tonality, impulsiveness or modulation associated with new and modified equipment will not protrude sufficiently above ambient noise levels to be discernible at the selected receptors.

Warning alarms associated with starting and stopping of new or modified equipment will be non-tonal.

7.3 Discussion

The Efficiency Project design is yet to be finalised. The results presented above demonstrate that the current Project design can achieve the project noise objectives without the need for significant remedial noise controls.

If modelling of future design changes predicts changes to noise impact, remedial controls of new or existing equipment can be applied to ensure project noise objectives are met.


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A noise management plan will be required to track changes to noise emissions as the Project design matures and to ensure that equipment noise emissions do not exceed those assumed for the noise modelling when the Project is implemented.


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8.0 Construction Noise

Details of construction activities are not yet available and associated noise impacts have not been assessed. Therefore, a general review of noise management measures likely to be required during construction activities is provided below.

8.1 Noise Management Requirements for Daytime Construction Activities

The Environmental Protection Noise Regulations 1997 state that for construction work carried out between 7am and 7pm on any day, which is not a Sunday or public holiday the assigned noise levels do not apply provided that:

− The construction work is carried out in accordance with control of noise practices set out in Section 6 of Australian Standard 2436-1981 “Guide to Noise Control on Construction, Maintenance and Demolition Sites”; and

− The equipment used for the construction is the quietest reasonably available.

The Chief Executive Officer5 (CEO) may request that a noise management plan be submitted for the construction work at any time.

8.2 Noise Management Requirements for Out of Hours Construction Activities

For construction work done outside daytime hours or on Sundays and public holidays:

− The construction work must be carried out in accordance with control of noise practices set out in Section 6 of Australian Standard 2436-1981 “Guide to Noise Control on Construction, Maintenance and Demolition Sites”; and

− The equipment used for the construction must be the quietest reasonably available.

Furthermore, if noise emissions are likely to exceed the assigned noise levels then:

− The contractor must advise all nearby occupants or other sensitive receptors who are likely to receive noise levels which fail to comply with the standard under Regulation 7, of the work to be done at least 24 hours before it commences;

− The contractor must show that it was reasonably necessary for the work to be done out of hours; and

− The contractor must submit to the CEO a Noise Management Plan at least seven days before the work starts, and the plan must be approved by the CEO. The plan must include details of:

▪ Need for the work to be done out of hours; ▪ Types of activities which could be noisy; ▪ Predictions of the noise levels;

5 The power of the CEO of the Department of Water and Environmental Regulation is delegated under the noise regulations to the CEOs of all local governments in the State of Western Australia.


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▪ Control measures for noise and vibration; ▪ Procedures to be adopted for monitoring noise emissions; and ▪ Complaint response procedures to be adopted.


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9.0 Conclusion

The following conclusions are drawn from this noise impact assessment:

− Noise emissions associated with the Efficiency Project will not be discernible above existing ambient noise at noise sensitive receptors surrounding the Pinjarra refinery.

− Predicted noise from new and modified equipment associated with the Efficiency Project does not contribute to any exceedance of the assigned levels.

− Any intrusive or dominant characteristics associated with the Efficiency Project will not protrude sufficiently above ambient levels to be discernible at noise sensitive receptors surrounding the refinery.

− A noise management plan is required to ensure that noise emissions do not exceed those assumed for the noise modelling as the Project progresses through design and implementation.

-o0o-


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Appendix A Noise Source Sound Power Level A.1 Efficiency Project Sources

Table A-1 : Efficiency Project Equipment Sound Power Levels for New or Modified Equipment

Area Name

Total

Lw,

dB(A)

Octave Band Sound Power Levels, dB(A)

63Hz 125Hz 250Hz 500Hz 1kHz 2kHz 4kHz 8kHz

15 New Reclaimer Conveyor 100.1 80.6 89 92.3 95.1 93.9 91.8 86.4 78.2

15 New Reclaimer Bucket 103 75.3 86.6 92.8 99.7 98.3 94.2 88.5 81.6

15 New Reclaimer Bucket Conveyor 93 73.1 81.5 84.8 87.6 86.4 84.3 78.9 70.7

15 New Reclaimer Bucket Drive Motor 106 78.8 89.7 95.2 102.4 99.8 97.1 90.3 83.4

15 New Reclaimer Bucket to Chute Conveyor 100 75.9 82.2 87.3 91.1 95 95.9 89.3 80.1

15 New Reclaimer Transfer Chute 107.1 86.7 95.9 96.5 98.3 100.5 102 97.1 96

15 New Reclaimer Winch and Drive Motor 104 69.7 81.9 92.2 95.9 100 98.2 96 87.5

15 Upgraded motors and gearboxes for Conveyors B1, B2

and C1 105 78 88.9 94.4 101.6 99 96.3 89.5 82.6

15/25 New Bauxite Storage Bin Apron Feeder/ HPU 105 78.0 88.9 94.4 101.6 99.0 96.3 89.5 82.6

25 New Mill fan 98.1 68.9 83.7 88.6 93.5 92.5 90.6 85.1 74

25 New Mill fan motor end 95.5 71.1 74.8 85.1 83.2 94.1 83.8 80.2 74.2

25 New Mill Filtering Cleaner System Blower Exhaust 107.4 64.3 78.7 87.2 103.7 103.9 97.4 88.9 82.6

25 New Mill Lower Door 109.6 76.2 87.5 93.9 101.5 105.6 104.8 98.9 86.9

25 New Mill lube system cooler fan 90 65.8 71.7 85 86.6 82.9 - - -

25 New Mill Product Slurry Pump 94 60.2 70.6 75 81.4 91.8 82.9 87 78.7

25 New Mill Slurry Discharge Pump 94 60.2 70.6 75 81.4 91.8 82.9 87 78.7

25A 25A_New Transfer Pumps 1 - 8 96.6 57.6 74.6 82.6 89.6 92.6 90.6 86.6 51.4

30 30_CRD Condi Pumps 1 - 10 97 58 75 83 90 93 91 87 51.8


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Area Name

Total

Lw,

dB(A)



30A 30A_Liquor to Mill Pump 98 68.1 80.2 85.4 93.4 93 90.9 85.5 77.7

34 34_Sand removal rake classifier motors 90 60.1 72.2 77.4 85.7 85 82.9 77.5 69.7

35 35_COT Pump A - E 98 68.1 80.2 85.4 93.4 93 90.9 85.5 77.7

35A 35A - Balancing Pump 1 - 2 97 58 75 83 90 93 91 87 51.8

35A 35A_Green Liquor Pump 1 - 11 97 58 75 83 90 93 91 87 51.8

35C 35C_Tank Pumps #45 - 55 OF/UF 95 58.7 77.2 83 86.7 88.6 91 86.4 72.7

35D 35D_Pump 1 - 3 98.6 59.6 76.6 84.6 91.6 94.6 92.6 88.6 53.4

35E 35E_Pump 1 - 4 97 58 75 83 90 93 91 87 51.8

35F 35F_Underflow Pump 1 - 18 93.3 54.3 71.3 79.3 86.3 89.3 87.3 83.3 48.1

35H 35H_Unit 5 Overflow return Pump 95 62.5 79.5 83.7 87.6 90 89.5 84.7 78.1

35L 35L_Pump 1-2 97 58 75 83 90 93 91 87 51.8

35M 35M_Floc Tank Agitator 1 - 2 88.8 49.8 66.8 74.8 81.8 84.8 82.8 78.8 43.6

35M 35M_Floc Transfer Pump 1 - 2 97 58 75 83 90 93 91 87 51.8

35M 35M_Pnuematic Transport Blower 109.4 89.2 96.2 97.2 107.2 103.2 95.2 91.2 85.2

35X 35X_agitator for Mud Mixing Tank 90 60.1 72.2 77.4 85.7 85 82.9 77.5 69.7

35X 35X_agitators 1 - 4 for Mud Dump Tanks 85 55.3 64.1 68.8 72.8 78.3 81.4 78.1 62.3

35X 35X_Diaster Feed Boost Pump 1 - 2 97 58 75 83 90 93 91 87 51.8

35X 35X_Mud Mixing Tank Pumps 93 65.4 76.8 80.9 84.8 88.4 87.8 83.2 73.2

35X 35X_Unitised Mud Dump Pumps 1 - 4 98 65.9 76 83 85.9 92.5 94.1 90.1 84.2

37 37_Oxalate Plug Flow Reactor Slurry Feed Pump 96 68.4 79.8 83.9 87.8 91.4 90.8 86.2 76.2

40 40-Spent Liquor Pumps A - D 98 65.9 76 83 85.9 92.5 94.1 90.1 84.2

44 44_Agitator 1 - 2 88.8 49.8 66.8 74.8 81.8 84.8 82.8 78.8 43.6


1403401-1-100 Rev 0 | March 2019 Page 35 of 63

Area Name

Total

Lw,

dB(A)



44 44_Blow snap air compressor 100.2 80 87 88 98 94 86 82 76

44 44_Caustic Wash Pump 1 - 2 93.3 54.3 71.3 79.3 86.3 89.3 87.3 83.3 48.1

44 44_Filter Air Blower 1 - 3 95.1 56.1 73.1 81.1 88.1 91.1 89.1 85.1 49.9

44 44_Filtrate Pump 1 - 2 97 58 75 83 90 93 91 87 51.8

44 44_Product filtering-filter drive 1 - 3 98.8 68.9 81 86.3 94.2 93.9 91.7 86.3 78.5

44 44_Repulp Pump 1 - 3 98.6 59.6 76.6 84.6 91.6 94.6 92.6 88.6 53.4

44 44_Seal Water Pump 1 - 2 92 53 70 78 85 88 86 82 46.8

44 44_Vac Pump 1 - 3 97 58 75 83 90 93 91 87 51.8

44 44_Vapour Extraction Fan 1 - 3 88.8 49.8 66.8 74.8 81.8 84.8 82.8 78.8 43.6

45 45_1st Stage ISC Slurry Cooler Pump 102 68.3 78.7 83.1 89.4 99.9 91 95.1 86.7

45 45_2nd Stage ISC Slurry Cooler Pump 102 68.3 78.7 83.1 89.4 99.9 91 95.1 86.7

45 45_New Precipitation Agitators 1 - 10 93 62.8 72.2 82.1 90.1 87.7 81.3 77.1 72.7

45 45_New Run down tank Agitator 93 58.5 68.6 77.8 89.7 88.9 81.7 77.4 69.9

45 45_Cleaning Liquor Recirc Pump A - D 93 65.4 76.8 80.9 84.8 88.4 87.8 83.2 73.2

45 45_Coarse Seed Pump 96 69 78.5 79.3 82.4 92.1 89.8 87.3 87

45 Precip Pump - off Pump 96 69 78.5 79.3 82.4 92.1 89.8 87.3 87

45A 45A-Green Liquor Pump 1 - 2 98.8 68.9 81 86.3 94.2 93.9 91.7 86.3 78.5

45H 45H_Hydrate Transfer Pump 96 68.4 79.8 83.9 87.8 91.4 90.8 86.2 76.2

45D 45D_Tray Thickener UF Pumps 93 65.4 76.8 80.9 84.8 88.4 87.8 83.2 73.2

45T 45T Cooling Water Pump 98 70.4 81.8 85.9 89.8 93.4 92.8 88.2 78.2

45T 45T Cooling Tower Fan 98 70.4 81.8 85.9 89.8 93.4 92.8 88.2 78.2

50 50 PD Blowers A/B 92 72.7 74.4 79.6 84.7 86.5 85.2 82.3 74.9


1403401-1-100 Rev 0 | March 2019 Page 36 of 63

Area Name

Total

Lw,

dB(A)



50 50_PD Blower A/B Ducts 100 72.1 78.1 83 90.5 96.2 94.7 91.4 79.1

50C 50C_New Cyclone Pump Motor 80 52.4 63.8 67.9 71.8 75.4 74.8 70.2 60.2

BiOX Biox Destruction Pump 93.1 58.5 68.9 78.4 89 90 79.2 77.3 71.4

BioX Biox Tank Agitator 93.1 58.5 68.9 78.4 89 90 79.2 77.3 71.4


1403401-1-100 Rev 0 | March 2019 Page 37 of 63

A.2 Existing Refinery, Residue Area and Filtration Plant Sources

Table A-2 :Existing Refinery, Residue Area and Filtration Plant Equipment Sound Power Levels

Operations Area Source

Overall

Sound

Power

[dBA]

Octave Band Sound Power Levels, dB


37 Building 37 111 110.3 116.1 108.8 108.1 106.4 102.3 96.8 -

110 (Powerhouse) ID Fan 5 98.1 91.7 93.1 94.8 94.2 95.2 89.3 80.7 72

110 (Powerhouse) ID Fan 3 98.9 81.5 92.5 93.9 92.7 91.3 95.4 83.6 -

110 (Powerhouse) 110_cooling tower north 107.8 107.9 109.8 109.3 105.4 101.8 97.5 96 93.9

110 (Powerhouse) 110_cooling tower_south 107.8 107.9 109.8 109.3 105.4 101.8 97.5 96 93.9

110 (Powerhouse) FD Fan 3 107.9 103.2 107.6 104.3 102.5 103.3 102.6 92 -

110 (Powerhouse) FD Fan 6 108.2 108.3 105.7 104.3 98.2 98.1 103.5 101.5 94.2

110 (Powerhouse) FD Fan 7 108.2 108.3 105.7 104.3 98.2 98.1 103.5 101.5 94.2

110 (Powerhouse) 110_NG pipe west side of 110 110.5 99 96.6 91 90 105.3 105.1 103.6 97.7

110 (Powerhouse) FD Fan 4 112 111.3 117.6 110.4 106.9 106.8 105.5 95.3 -

110 (Powerhouse) 110_NE piping 114.3 103.2 105.7 103.2 115.5 107.4 100.9 102.3 91.4

110 (Powerhouse) FD Fan 5 115.1 113.2 115.8 112.4 110.5 110.9 108.9 98.6 -

110 (Powerhouse) Powerhouse Building 115.7 120.3 115.8 112.1 111.4 110.6 108.5 106.6 100.8

110 (Powerhouse) 110_NW piping 115.9 111.2 108.2 107.4 116 106.7 105.5 108.2 101

110 (Powerhouse) 110_N piping 116.2 113.5 107.6 103.8 118.1 105.7 105.3 103.3 94.5

25 (Milling) 25A HPU 87 79.4 79.1 77.5 89.2 77.7 74.9 70.2 71.5

25 (Milling) 25A pump 71 87.2 82.9 85.8 83.5 81.5 80.8 77.6 82.5 69.4

25 (Milling) Mill7 lube system cooler fan middle 90 89.6 86.7 94.1 89.7 83.5 - - -

25 (Milling) Mill7 lube system cooler fan north 90 89.6 86.7 94.1 89.7 83.5 - - -


1403401-1-100 Rev 0 | March 2019 Page 38 of 63


Overall

Sound

Power

[dBA]



25 (Milling) Mill7 lube system cooler fan south 90 89.6 86.7 94.1 89.7 83.5 - - -

25 (Milling) SCP-01 93.9 86.2 87.9 83.1 84.4 91.4 81.8 85.9 79

25 (Milling) SCP-02 93.9 86.2 87.9 83.1 84.4 91.4 81.8 85.9 79

25 (Milling) SDP-011 94.5 89.9 98.9 89.3 87.6 92.1 84.6 81.7 75.6

25 (Milling) SDP-021 94.5 89.9 98.9 89.3 87.6 92.1 84.6 81.7 75.6

25 (Milling) SDP-031 94.5 89.9 98.9 89.3 87.6 92.1 84.6 81.7 75.6

25 (Milling) SDP-042 94.5 89.9 98.9 89.3 87.6 92.1 84.6 81.7 75.6

25 (Milling) SDP-052 94.5 89.9 98.9 89.3 87.6 92.1 84.6 81.7 75.6

25 (Milling) Mill7 fan (IMAG0405) motor end 95.5 95.4 90.9 94.9 85.9 93.9 82.6 79.3 75.2

25 (Milling) Mill7 fan (IMAG0405) 98.1 93.3 98.9 97.3 96.3 92.6 89.4 84.1 74.7

25 (Milling) Mill 6 GBox 104.4 98.7 99.3 100.3 105.9 96.4 96.1 84.5 77.6


25 (Milling) Mill 5 GBox 107.3 98.8 100.5 102.7 106.2 103.8 96.9 88 79

25 (Milling) Filtering Cleaner System Blower Exhaust 107.4 89.6 94 96.2 106.3 104.5 96.2 87.8 84.1

25 (Milling) Mill 7 109.6 100.7 103 102.2 104.3 105.6 103.7 97.9 87.4


25 (Milling) Mill 1 GBox 112.4 104.8 108.6 108 111.9 108.4 100 91.4 81.4

25 (Milling) Mill 6 114.2 113.3 114.7 114.9 111.8 109.8 105.4 - -

25 (Milling) Mill 4 114.2 113.3 114.7 114.9 111.9 109.8 105.4 - -

25 (Milling) Mill 5 114.2 113.3 114.7 114.9 111.9 109.8 105.4 - -

25 (Milling) Mill 3 GBox 114.8 102.4 105.4 104.1 116.4 102.4 98.1 89.8 78

25 (Milling) Mill 7 115.6 118.7 117.1 114.2 111.5 110.8 109 102.7 92.5


1403401-1-100 Rev 0 | March 2019 Page 39 of 63


Overall

Sound

Power

[dBA]



25 (Milling) Mill 1 118.9 115.2 117.8 116.7 115.1 115.4 111.6 - -

25 (Milling) Mill 2 118.9 115.2 117.8 116.7 115.1 115.4 111.6 - -

25 (Milling) Mill 3 118.9 115.2 117.8 116.7 115.1 115.4 111.6 - -

30 (Digestion) RTO Fan 98.3 105 91.2 86.2 98.8 89.6 86.5 83.8 80.4

34 (Sand Removal) Building 34 112.1 112.1 112.8 111.4 109.8 106.7 104.1 99.8 34.2

35 (Filtration) 35F_agitators #24 76.8 78.7 73.8 73.4 72 74.4 67.6 63 59.2

35 (Filtration) 35F_agitators #33 77.7 78.9 74.8 74.3 73.4 75.3 67.7 63.5 63.8

35 (Filtration) 35F_agitators #32 79.1 82 77.9 80.1 74.9 74 71 68.1 60.8


35 (Filtration) 35F_agitators #21 81 83.5 78.2 77.7 75.7 78.7 70.6 69.4 59


35 (Filtration) 35F_agitators #11 84.8 81.5 79.9 76.6 75.6 78.4 80.2 77 63

35 (Filtration) 35F_agitators #31 84.8 81.5 79.9 76.6 75.6 78.4 80.2 77 63

35 (Filtration) 35C_agitators #11 85.2 80.4 83.8 84.3 81 79.3 78.6 75.4 66.1










1403401-1-100 Rev 0 | March 2019 Page 40 of 63


Overall

Sound

Power

[dBA]






35 (Filtration) 35J_condensate return pump #13 end 85.8 76.4 83.9 86.6 85.8 76.8 75.5 73 72.3

35 (Filtration) 35J_condensate return pump #12 end 87.3 75.4 86 84 81.7 80.7 80.8 78.6 78.1

35 (Filtration) 35J_return pumps #1E 88 85.2 81.5 78.9 78 82.1 82.2 81.8 74.1

35 (Filtration) 35J_return pumps #3E 88 85.2 81.5 78.9 78 82.1 82.2 81.8 74.1


35 (Filtration) 35J_return pumps #1N 90.5 80.7 82.4 80.1 79.4 85.1 84.2 84.5 74.8

35 (Filtration) 35J_return pumps #3N 90.5 80.7 82.4 80.1 79.4 85.1 84.2 84.5 74.8

35 (Filtration) 35J_return pumps #1W 90.6 81.1 83.6 83.8 80.8 85.4 83.5 85.1 73.9

35 (Filtration) 35J_return pumps #3W 90.6 81.1 83.6 83.8 80.8 85.4 83.5 85.1 73.9

35 (Filtration) 35J_return pumps #1S 91.6 84.6 85.5 82.2 80.4 86.3 84.7 86.4 75.3

35 (Filtration) 35J_return pumps #3S 91.6 84.6 85.5 82.2 80.4 86.3 84.7 86.4 75.3

35 (Filtration) Kiln Lube Shed 94.2 90.9 79.7 89.1 96.9 85.2 75.4 65.2 36.8

35 (Filtration) 35_sump pump 95 92.8 93.9 92.2 91.1 88.3 86.8 87.6 83.3

35 (Filtration) 35J_return pumps #1 Top 95.6 83.5 85.5 84.5 83.6 90.9 89.3 89.4 77.5

35 (Filtration) 35J_return pumps #3 Top 95.6 83.5 85.5 84.5 83.6 90.9 89.3 89.4 77.5

35 (Filtration) 35C_tank pumps #13 97.4 86 101.5 92.3 95.7 92.9 86.8 82.8 81.8

35 (Filtration) 35C_tank pumps extra #11 97.4 86 101.5 92.3 95.7 92.9 86.8 82.8 81.8




1403401-1-100 Rev 0 | March 2019 Page 41 of 63


Overall

Sound

Power

[dBA]



35 (Filtration) 35_rotary filter feed pump #37A-2 97.9 92.9 97.3 93.9 92.1 93.2 89.2 88 90

35 (Filtration) 35_overflow pump 98 89.7 91.1 91.8 98.7 92.9 87.2 81.9 83

35 (Filtration) 35J_condensate return pumps #13 98.4 91.3 96.9 96.6 93.6 92 92.2 87.8 85.9

35 (Filtration) 35_liquor turnback pump #35-1 98.8 94.2 96 94.4 97.6 94 90.6 85.3 79



35 (Filtration) 35_backwash pump #2 99.1 92 94.6 91.9 92 95.1 91.1 87.8 92.2

35 (Filtration) 35_oxilate filter feed pump #35U-1 99.5 96.3 103.9 98.1 94.7 95.3 90.8 85.9 80

35 (Filtration) 35_oxilate filter feed pump #35U-3 99.5 96.3 103.9 98.1 94.7 95.3 90.8 85.9 80

35 (Filtration) 35_oxilate transfer pump #1 99.7 95.1 94.7 93.5 96.3 96.8 91.3 83.4 74.3



35 (Filtration) 35_hose water pump #1 99.8 100 94.3 97.4 96.3 95.4 91.5 89.7 81.9

35 (Filtration) 35_hose water pump #2 99.8 100 94.3 97.4 96.3 95.4 91.5 89.7 81.9

35 (Filtration) 35C_tank pumps #24 100.1 93 101.5 97 96 95.1 93.5 88.8 83.5

35 (Filtration) 35C_tank pumps extra #10 100.1 93 101.5 97 96 95.1 93.5 88.8 83.5






35 (Filtration) 35J_condensate return pumps #12 100.9 89.6 98.1 97.8 95.3 94.4 94.7 91.9 91.3


1403401-1-100 Rev 0 | March 2019 Page 42 of 63


Overall

Sound

Power

[dBA]



35 (Filtration) 35_wash water pump #35-2 101.2 97.1 101.1 99.7 98.1 96.6 92.8 89.1 82



35 (Filtration) 35C_tank pumps #11 101.5 89.2 101.6 96 98 94.7 96.3 91.2 78.2

35 (Filtration) 35C_tank pumps #21 101.5 89.2 101.6 96 98 94.7 96.3 91.2 78.2

35 (Filtration) 35C_tank pumps extra #1 101.5 89.2 101.6 96 98 94.7 96.3 91.2 78.2



35 (Filtration) 35C_tank pumps #12 102.1 91.3 100 96.3 99 99 93.4 88.9 82.3

35 (Filtration) 35C_tank pumps #22 102.1 91.3 100 96.3 99 99 93.4 88.9 82.3

35 (Filtration) 35C_tank pumps #15 103 93.5 99.3 99.5 97.9 96.6 97.8 93.4 81.3

35 (Filtration) 35C_tank pumps #25 103 93.5 99.3 99.5 97.9 96.6 97.8 93.4 81.3

35 (Filtration) 35_mud relay pump #3 103.2 94.6 96 94 103.4 97.6 92.6 89.8 89.1

35 (Filtration) 35_mud relay pump #4 103.2 94.6 96 94 103.4 97.6 92.6 89.8 89.1

35 (Filtration) 35J Building 108.1 98.8 101.3 106.8 102.1 103.2 101.6 97.5 -

35 (Filtration) 35C_tank pumps #14 115.8 87.9 100.1 94.4 94.7 106.4 110.7 111.4 93.1

35 (Filtration) 35C_tank pumps #23 115.8 87.9 100.1 94.4 94.7 106.4 110.7 111.4 93.1

37 (BiOx) UFP021 - Underflow Pump No 1 86.4 79.4 83.3 81.3 83.4 81.5 79 76.7 74.7

37 (BiOx) Bio Reactor Feed Prep Agitator 93.1 83.2 84.6 87.2 92 90.6 78 76.4 72.6

37 (BiOx) PJ037B - UFP011 94.8 82.4 90.5 86.1 84.9 87.5 90.3 87.9 79.2

37 (BiOx) BPP001 - Product Pump No 1 100.2 84.6 90.9 91.5 93.1 93.2 94.5 92.2 93.2

37 (BiOx) PJ037B - IDF002 100.8 82.9 95.5 94.5 96.3 95.2 94.1 93 87.4


1403401-1-100 Rev 0 | March 2019 Page 43 of 63


Overall

Sound

Power

[dBA]



37 (BiOx) BiOx Cooling Tower 101.4 98 103 102.7 98.4 96.1 89.9 90.1 91.8

37 (BiOx) PJ037B - IDF001 101.9 82.5 92.5 93.8 92.6 95.2 95.1 96.7 90.3

37 (BiOx) PJ037B - Instrument Junction Box 1 101.9 102.3 108.1 98.3 94.6 98.8 93.9 90.9 87.4

37 (BiOx) PJ037B - Instrument Junction Box 2 101.9 102.3 108.1 98.3 94.6 98.8 93.9 90.9 87.4

37 (BiOx) PJ-PWP258001 - Packing Water Pump 103.1 93.2 94.4 96.3 96.8 99.3 96.6 92.2 89.5

37 (BiOx) PJ-PWP258002 - Packing Water Pump 103.1 93.2 94.4 96.3 96.8 99.3 96.6 92.2 89.5

37 (BiOx) Bio Reactor Tank No2 Agitator 104.8 84.5 87.5 99.7 100.3 97.9 89.7 100.8 89.2

37 (RTO) 37_RTO Sources 101.6 100.9 101.5 100.4 100.7 96.5 92.2 86.3 75.5

37 (RTO) 37_RTO_Kiln 103.9 88.2 89.6 97.5 102 101.2 92.6 79.1 66.5

42 (Evaporation) 42_hotwell pumps #42-31 98.3 82.1 88.1 90.3 93.9 94.2 90.7 87.5 86.8









42 (Evaporation) Building 42 116.6 112.8 116.2 113.3 112.8 111.5 110.3 105.1 -

45 (Precipitation and

Filter) 44_Vacuum Pump 4 Cyclone 79.5 - 63.8 87.1 74.3 - - - -


Filter) 45_agitators_H9 85.7 91.9 89.5 87.4 84.5 80.5 74 68.6 64.3


1403401-1-100 Rev 0 | March 2019 Page 44 of 63


Overall

Sound

Power

[dBA]




Filter) 45_agitators_F11 89 91.4 89.3 87.8 89.6 83.2 76.3 69.7 65.5


Filter) 45_agitators_E15 89.7 88.1 86 86.4 89.3 85.4 78.9 74 69.8


Filter) 45_agitators_D6 90 90 81 84.6 88.9 84.8 78.1 79.3 80.4


Filter) 45_agitators_E7 90.4 90 84.9 86.1 87.5 88 79.6 74.2 76.2


Filter) 45_agitators_C10 90.5 89.4 84.5 85.7 88.9 87 80 75.9 73.5


Filter) 45_agitators_E10 90.7 89.9 86.4 89 90 85.5 80.4 75.4 71.7


Filter) 45_agitators_C8 90.9 88.6 82.6 84.6 90.8 86.9 79.3 71.3 69.4


Filter) 45_agitators_A15 91.3 89.4 84.2 85.3 88.5 88.9 80.4 74.2 64.8




Filter) CCP_12 91.3 94.4 93.7 87.1 85.7 88.7 81.5 79.6 73.8




Filter) 45_agitators_H7 91.5 93.4 91.1 90.9 90.2 87.4 79.8 73.2 68.1


Filter) 45_agitators_B12 91.6 89.9 84.8 87.8 91.8 86.9 80.6 73.6 69.9


Filter) 45_agitators_D10 91.7 87.8 85.3 87 92.2 87.5 78.7 74.1 71.8


1403401-1-100 Rev 0 | March 2019 Page 45 of 63


Overall

Sound

Power

[dBA]




Filter) 45_agitators_B1 91.8 87.4 83 86.7 91.4 87.9 79.4 73.1 68.7


Filter) 45_agitators_D3 91.9 87.2 84 87.3 92.3 87.6 80 74 70.4


Filter) 45_agitators_A14 92 90.4 87.6 88.5 92 87.4 79.2 76.8 70.9


Filter) 45_agitators_B7 92 88.2 87 87.1 93.7 85.8 79.5 72.6 66.2


Filter) 45_agitators_F1 92 91.8 100 89.2 89.7 86.6 79.6 72 66.8


Filter) 45_agitators_B11 92.1 88.5 83.8 85.6 92.9 87 82.1 73.7 70


Filter) CCP_15 92.1 90.7 90.6 84.7 81.7 87.9 84.7 82.5 84.3


Filter) 45_agitators_A9 92.2 90.3 86.7 88.1 92.2 87.4 81.5 76 72.8




Filter) 45_agitators_D12 92.4 89.2 85 86.5 93.7 87.8 78.2 73.4 68.5


Filter) 45_agitators_F10 92.4 90.4 87.4 89.5 91.9 86.6 79.9 80.2 83.4




Filter) 45_agitators_B2 92.6 87.7 84 85.3 92.5 89.3 79.8 74.1 70


Filter) 45_agitators_C4 92.6 90.1 83.3 87.5 89.8 90.7 80.1 77.5 66


1403401-1-100 Rev 0 | March 2019 Page 46 of 63


Overall

Sound

Power

[dBA]




Filter) 45_agitators_D15 92.6 87.4 83.2 85.6 92.8 88.7 80.3 76 70.4


Filter) 45_agitators_A13 92.7 92.1 86 93.5 90.6 88.3 81.8 80.9 74.6


Filter) 45_agitators_B15 92.7 85.3 83.5 88.8 92 89 81.4 73.8 71.9






Filter) CCP_1 92.7 92.5 92.3 86.1 85 90.5 83.9 80.3 78.8


Filter) 45_agitators_E6 92.8 89 84.9 89.1 91.2 86.1 79.6 82.8 87.1


Filter) 45_agitators_C5 93 88.4 82.7 86.5 92.7 89.5 80.2 75.1 72.6


Filter) CCP_4 93 96.3 94.6 87.4 86.1 89.3 85 82.8 80.4


Filter) 45_agitators_E13 93.1 89.1 85.4 88 92.9 89.5 80.7 75.3 73.4




Filter) 45_agitators_D2 93.2 89.8 86.2 88.5 91.9 89.6 83.9 77 70.6


Filter) 45_agitators_D5 93.2 90.9 83.3 87.1 93.9 88.3 80.6 78.3 78.5


Filter) 45_agitators_F7 93.2 93 91 92.1 93.9 87.2 80.1 76 75.1


1403401-1-100 Rev 0 | March 2019 Page 47 of 63


Overall

Sound

Power

[dBA]




Filter) CCP_7 93.2 96.1 95 88.9 87 91.1 83.2 79 72.3




Filter) 45_agitators_E3 93.3 89.4 86.9 91.5 93.1 88 79.9 77 72.9


Filter) 45_agitators_A2 93.4 88.7 86.3 88.5 94.7 87.6 80.9 75 71.3


Filter) 45_agitators_B10 93.4 91.2 87.3 87.6 94.3 88.2 81.9 77.4 74


Filter) 45_agitators_D7 93.5 89.4 82.6 86 94.3 88.2 81.6 76.5 77.3




Filter) 45_agitators_C7 93.6 87.7 82.9 86.1 93.1 90.4 81 76.9 72.4


Filter) 45_agitators_H11 93.6 93.4 89.9 89 93.3 90.2 80.6 76.6 68


Filter) CCP_13 93.6 93.3 92 86.4 86.9 90.9 85.2 80.6 78.6




Filter) 45_agitators_E11 93.8 89.5 86.6 89.2 92 91 81.8 74.3 70.6


Filter) 45_agitators_E4 93.8 89.8 87.1 89.4 94.4 88.6 81.8 76.5 73.8


Filter) 45_agitators_A6 93.9 89.5 85.8 87.4 93.8 89.9 81.8 76.3 73


1403401-1-100 Rev 0 | March 2019 Page 48 of 63


Overall

Sound

Power

[dBA]






Filter) 45_agitators_E5 93.9 89.4 85.6 87.8 94 89 81.8 80.3 81.3


Filter) 45_agitators_B13 94 88.8 85.9 89.2 92.6 91.5 80.4 74.4 69.8


Filter) 45_agitators_B3 94 89.6 86 89.5 96.8 85.1 79.1 75.2 70.5


Filter) 45_agitators_D9 94 89.5 83.2 85.9 94.1 89.7 84 76.4 71.2


Filter) 45_agitators_F15 94 91.8 87.7 90.1 92.3 91 81.2 77 78.4


Filter) 45_agitators_H6 94 93.1 92.1 91.7 93.7 90 81.3 75.5 72


Filter) CCP_11 94 94.6 93.2 88 86 90.7 86.6 84.3 79.4




Filter) 45_agitators_E12 94.1 90.1 88 87.8 92.9 91.4 81.5 75 72.2


Filter) 45_agitators_F6 94.1 93.7 89.7 92.3 93.7 89.3 83 77.6 78.5


Filter) 45_agitators_A4 94.2 91.2 86.5 87.5 95.3 88.9 81 78.2 72.9


Filter) 45_agitators_B8 94.3 87.4 84.3 88 95.2 89.8 81.4 75.3 70.8




1403401-1-100 Rev 0 | March 2019 Page 49 of 63


Overall

Sound

Power

[dBA]








Filter) CCP_8 94.4 96.7 94.6 88.1 86.7 90.7 88.3 84.3 71.1




Filter) CCP_9 94.5 94.8 92.1 87.6 86.4 90.7 88.1 85.1 78.3






Filter) 45_agitators_B5 94.7 89.9 82.8 87.3 95.3 90 83.8 73.6 71.1




Filter) CCP_14 94.8 92.6 93.6 88.2 87.2 90.7 88.6 85.7 79.9




Filter) 45_agitators_H10 95 91.7 90 90.6 94.9 91.2 82.4 77.3 74.1


Filter) 45_agitators_H3 95 93 90 94 95.8 88.8 83.3 74.2 69.1




1403401-1-100 Rev 0 | March 2019 Page 50 of 63


Overall

Sound

Power

[dBA]




Filter) CCP_5 95.1 97.2 94.6 88.3 87.3 91.3 88.6 85.6 80.3


Filter) 45_agitators_B14 95.2 90 85 88.2 97.3 88.6 81.9 80.4 75.5








Filter) CCP_10 95.4 95 92.8 88.3 87.2 91.4 89.1 86.4 80.4


Filter) 45_agitators_E14 95.5 89.5 87.2 88.9 94.8 92.7 82.3 76 73.5




Filter) CCP_6 95.6 98.3 93.8 89.4 87.9 91.5 88.2 87.4 81.4




Filter) 45_agitators_G7 96 96.2 90.6 91.5 93.6 91.6 88.1 83.5 80.1


Filter) 45_agitators_H4 96 92.3 89.6 91.1 94.9 93.2 84 77.9 73.7


Filter) CCP_2 96 94.5 92.3 86.1 86.4 92.1 89.2 87.3 82




1403401-1-100 Rev 0 | March 2019 Page 51 of 63


Overall

Sound

Power

[dBA]






Filter) CCP_3 96.3 95.9 92.1 86.3 86.2 95.1 83.9 78.8 71.4


Filter) 45_agitators_F3 96.6 94.1 90.7 93 96.1 91.1 87.5 81.8 82.7


Filter) 45_agitators_A11 96.8 89.1 87 90.5 99.6 88.8 82.1 74.1 70.7


Filter) 45_agitators_B6 96.8 91.7 82.7 89.8 96.4 93.2 86.3 74.9 71




Filter) 45_agitators_H8 96.8 94.9 92.1 92.6 96.2 93.7 82.8 78.5 78




Filter) 45_agitators_A7 97 87.2 84.5 88.1 94.8 93.8 87.8 82.2 76.5


Filter) 45_agitators_E2 97 90 89 92.3 99 89.6 83.7 77.9 73.4


Filter) 45_agitators_H1 97 95.3 91.6 91.3 94.4 94.7 83.4 79.3 75.5


Filter) 45_agitators_A12 97.4 91.3 85.9 90.4 95.6 94 89.3 77.2 74.8


Filter) 45_agitators_F4 97.4 90.9 91.4 90.6 98 91.7 86.3 81.1 84


Filter) 45_agitators_G14 97.4 94.9 94.7 94.1 95.8 91.8 88.8 86.5 82.8


1403401-1-100 Rev 0 | March 2019 Page 52 of 63


Overall

Sound

Power

[dBA]






Filter) 45_agitators_C13 97.6 87 96.6 98.2 96.7 92.5 85.1 75.1 67.2




Filter) 45_agitators_G11 97.8 95.6 91.8 93.8 98.1 93 86.3 82.5 76.6




Filter) 45_agitators_G13 98 97.3 91.6 91.7 92.6 92.5 92.8 88.2 83.3






Filter) 45_agitators_G10 99.2 94.9 90.9 92.8 95.9 95.7 91.1 87.3 84


Filter) 45_agitators_G1 99.6 96 92.9 93 96.8 95.5 92.5 87.1 82.3


Filter) 45_agitators_G12 99.6 96.6 93.3 94 95.2 95.7 92.2 88.8 83.6


Filter) 45A_precip fill pump #1 100.1 103.5 104.4 100.7 96.8 95.6 89.8 86.6 80.4






1403401-1-100 Rev 0 | March 2019 Page 53 of 63


Overall

Sound

Power

[dBA]














Filter) SLP 45E2 100.9 99.2 99.9 97.5 95.5 96.3 94.6 90 81.8


Filter) SLP 45E2A 100.9 99.2 99.9 97.5 95.5 96.3 94.6 90 81.8


Filter) SLP 45E3 100.9 99.2 99.9 97.5 95.5 96.3 94.6 90 81.8


Filter) SLP 45E4 100.9 99.2 99.9 97.5 95.5 96.3 94.6 90 81.8


Filter) SLP 45E5 100.9 99.2 99.9 97.5 95.5 96.3 94.6 90 81.8


Filter) SLP 45E6 100.9 99.2 99.9 97.5 95.5 96.3 94.6 90 81.8


Filter) 45_agitators_D8 101 89.2 85.2 89.2 98.7 97.3 93.2 82.8 81.8






1403401-1-100 Rev 0 | March 2019 Page 54 of 63


Overall

Sound

Power

[dBA]




Filter) 45_agitators_E8 101.7 90 87.5 92.2 104.1 95.6 86 79.5 76.3


Filter) 45_agitators_G5 101.9 96 94.3 94.8 98.7 96.1 94.9 93.3 88.1




Filter) 45A_precip fill pump pipe 102.5 - 113.1 95.5 97.1 96.1 90.6 - -


Filter) 45A-3 condenser water pump 103.1 106.5 107.4 103.7 99.8 98.6 92.8 89.6 83.4








Filter) SLP 45E1 103.9 102.2 102.9 100.5 98.6 99.3 97.6 93 84.8




Filter) Building 45T 111.9 115.5 112.8 111 109 107.1 102 102 -


Filter) Building 44 113.9 103.4 107.5 109.4 107.3 106.4 109.2 105.7 -

50 (Calcination) PD2 95.2 92.2 111.8 83.9 95.7 - - - -

50 (Calcination) Calciner 7-Vacuum Pump PJ050-VAP071 96.5 89.1 94.6 102 92.7 89 83.6 83.5 70

50 (Calcination) PD1 97.3 109.9 115.8 91.8 85.9 26.4 24.8 20.3 22.6

50 (Calcination) PJ050-HTF072 98.1 108.5 100.3 97.8 97.6 90.6 88.6 83.5 84.5


1403401-1-100 Rev 0 | March 2019 Page 55 of 63


Overall

Sound

Power

[dBA]



50 (Calcination) PJ050-HTF071 100 103.2 100 102 97.6 94.1 90.7 84.1 79.4

50 (Calcination) Calciner 7 HP Blower 101 103.7 105.1 100 100.1 96 89.2 81.2 71.4

50 (Calcination) 50C Centre Cooling Tower 102.1 110 105.2 103.5 99.4 96.7 92.1 89.4 84.7

50 (Calcination) 50C East Cooling Tower 102.1 110 105.2 103.5 99.4 96.7 92.1 89.4 84.7

50 (Calcination) 50C West Cooling Tower 102.1 110 105.2 103.5 99.4 96.7 92.1 89.4 84.7

50 (Calcination) Calciner 7 LP Blower 102.2 106.4 102.5 97.7 101.3 97.5 91.4 85.1 67.7

50 (Calcination) 50-C7 Cooling Tower 102.6 110.5 105.7 104 99.9 97.2 92.5 89.9 85.2

50 (Calcination) 50-7 Blower 107.2 111.2 93.7 102.9 105.6 98.6 102.4 91.4 84.9

50 (Calcination) 50-5 Blower 107.3 118.9 108.9 104 106.8 101.1 98.7 87 83.4

50 (Calcination) 50-3 Blower 109 114.8 116.1 105.8 107.7 103 100.7 88.7 76.6

50 (Calcination) 50-8 Blower 109.2 111.1 102 106.2 108.6 101.1 101.8 89.7 72.5

50 (Calcination) 50-6 Blower 112.1 122.6 114.5 106.4 109.9 107.6 105.2 90.4 83.1

50 (Calcination) Calciner 7 Building 113 105.7 106.2 108.3 111.6 108.3 103.6 99.8 95.2

50 (Calcination) 50-4 Blower 113 120.4 115 110.8 111.4 106.5 106.6 94.4 87.4

50 (Calcination) 50-1 Blower 113.2 118.4 112.9 109.8 110.2 108 107.1 96.7 88.6

50 (Calcination) Building 50 116.1 121.4 120.4 116.3 113.2 111 107.2 103.7 -

50 (Calcination) 50-2 Blower 117.1 120.4 119 116.2 111.7 110.7 109.9 109.3 103.6

51 (Train Loading) Tower B 82.4 91.5 92.2 84.2 79.6 75.8 71.4 67.3 63.7

51 (Train Loading) Dust Collector Fan 105.3 104.6 104.4 105.1 105.1 98 95.4 90.3 83.2

Cogen CGU1 Generator 103.4 103.8 110.8 100 102.9 96.9 90.8 91.7 43.5

Cogen CGU2 Generator 103.4 103.8 110.8 100 102.9 96.9 90.8 91.7 43.5

Cogen CGU2 WHRU 110 117.3 116.3 111.5 101 101.5 102 102.1 94.2


1403401-1-100 Rev 0 | March 2019 Page 56 of 63


Overall

Sound

Power

[dBA]



Cogen CGU1 WHRU 110.6 117.1 115.2 108 102.4 101.5 104 103.9 100.2

Filtration Plant MCV003 Mud Conveyor 3 Head Chute (Tripper Car) 84.5 96.2 90.3 87.1 80.4 76.9 75.7 70.1 65.6

Filtration Plant FWT001 Filtrate Wash Tank Agitator Motor 84.8 79.7 75.2 79.2 76.5 74.1 79.5 79.6 70.7

Filtration Plant MCV001 Mud Conveyor 1 Head Chute 84.9 88.2 89.4 86 80 77.9 76.7 76.5 65.2

Filtration Plant SUP001 Sump Pump 1 Pump 88.6 82.1 84.6 83.6 82.1 85.1 79.1 80.5 73.3

Filtration Plant Pully - Tripper Car Conveyor 90.5 89.6 95.1 95.4 86.5 80.4 78.4 75.8 71.9

Filtration Plant PLP001 LP Gland Pump 1 Fan 91.3 91.8 89.5 88.9 85.6 86.7 85.5 78.7 71.9

Filtration Plant CV02 Chute 91.6 93.5 93.9 86.3 83.7 85.2 87.1 81 78.6

Filtration Plant PHP001 HP Gland Pump 1 Fan 92 93.4 92.6 92.5 86.8 87 84.8 79.8 68.9

Filtration Plant MCV001 Mud Conveyor Belt 92.5 98.9 98.1 94.6 89.9 86 81.8 77.5 74.2

Filtration Plant MCV001 Mud Conveyor 1 Drive 93.9 67 74.6 77.2 82.8 86.9 85.5 90.1 79.1

Filtration Plant MCV002 Mud Conveyor 2 Drive 93.9 67 74.6 77.2 82.8 86.9 85.5 90.1 79.1

Filtration Plant MCV004 Mud Conveyor Drive 4 93.9 67 74.6 77.2 82.8 86.9 85.5 90.1 79.1

Filtration Plant Mobile CV drive 95.7 85.7 86.3 87 94.8 90.6 88.3 79.8 69.7

Filtration Plant FTP Pump 96.2 86.3 91.9 91.6 92.5 92.4 89.1 85 52.4

Filtration Plant Lighting Tower 1 96.5 112 105.6 97.5 89.7 89.1 88.5 82.3 75.7




Filtration Plant Sand Booster Pump #1 97.4 87.3 93.1 92.9 93.7 93.6 90.3 86.3 53.6

Filtration Plant Sand Booster Pump #2 97.4 87.3 93.1 92.9 93.7 93.6 90.3 86.3 53.6

Filtration Plant Upgraded 42_hotwell pumps #42-31 97.5 88 93.2 93 93.8 93.7 90.4 86.4 53.7


1403401-1-100 Rev 0 | March 2019 Page 57 of 63


Overall

Sound

Power

[dBA]







Filtration Plant MST001 Red Mud Storage Tank Agitator Mot 97.9 85.2 89.6 89.1 98 90.7 89.7 84.1 81

Filtration Plant Tripper Car Conveyor 98.2 90.7 96.2 102.9 95.7 87.4 83.9 82.4 79.3

Filtration Plant CWP002 Cloth Wash Pump 2 Pump Enclosure 98.3 92.9 98.1 92.4 95.5 92.6 90.4 89.1 82.3

Filtration Plant FBP001 Filtration Booster Pump 98.7 67.8 71.3 80.8 84.6 92.5 92.1 93.7 86.2



Filtration Plant Tripper Car Conveyor Drive 99.8 95 94.4 95.6 94.9 95.2 94.2 87.5 77

Filtration Plant FFP001 Filtration Feed Pump 100.4 70.6 73 81.6 84.8 96 92.5 95.4 86.3



Filtration Plant Filtrate return pump - Warman 6/4 100.4 95.6 90.6 91.5 89.2 95.1 96.2 90.7 79

Filtration Plant Upgraded COP Pump 100.5 90.3 96.1 95.9 96.8 96.7 93.4 89.4 56.7

Filtration Plant MCV004 Mud Conveyor 3 Belt 100.7 108.6 104.5 102.3 98.9 94 90.4 86.7 83.3

Filtration Plant MCV002 Conveyor 101.2 108.9 107.7 102.2 97.8 95 93 87 78.5

Filtration Plant Upgraded LBP Pump 102.2 92.2 97.8 97.6 98.5 98.4 95.1 91.1 58.4

Filtration Plant Upgraded MRP Pump 102.2 92.2 97.8 97.6 98.5 98.4 95.1 91.1 58.4

Filtration Plant Pully - Main Conveyor 104.1 92.6 94.5 91.1 88.6 92.1 98.5 100.2 89

Filtration Plant Filtration Building 104.5 108.4 107.1 106.8 102.4 98.6 93.9 89.2 83.1


1403401-1-100 Rev 0 | March 2019 Page 58 of 63


Overall

Sound

Power

[dBA]



Filtration Plant Spreader CV 107.6 116.6 108.7 106.4 106.4 102.8 93.9 95.8 92.4

Residue Pumps Storm lake transfer pump 80.9 71.9 80.2 73.7 74.3 76.5 72.6 74.3 65.8

Residue Pumps PWP-001 95 80.9 86 85.8 84.8 87.3 90.2 88.4 82.4

Residue Pumps White Pump 95.7 93.2 97.6 95.8 93 90.9 86.6 82.9 81.1

Residue Pumps SBP-022 96.8 90.1 89.1 88.8 90.7 92.3 90.7 86.1 86.6

Residue Pumps 258 sand booster pump 101.2 85.7 92.6 92.9 89.5 88.6 98.7 91.7 81.6

Residue Pumps 258 sand booster pumps 101.2 85.7 92.6 92.9 89.5 88.6 98.7 91.7 81.6

Residue Pumps transfer pump#1 101.2 85.7 92.6 92.9 89.5 88.6 98.7 91.7 81.6






Residue Pumps Cooling Water pump #4 101.4 98.1 103.3 96.8 94.1 98.4 92 90.6 71.9

Residue Pumps Cooling Water pump #5 101.4 98.1 103.3 96.8 94.1 98.4 92 90.6 71.9

Residue Pumps Cooling Water pump#3 101.4 98.1 103.3 96.8 94.1 98.4 92 90.6 71.9

Residue Pumps sump 256 102.1 94.2 100.5 102.4 100.8 97.5 90.8 85.5 79.5

Residue Pumps Raw sewerage pump 102.5 102.8 101.2 99.1 101 99 92.1 83.5 75.8

Residue Pumps Hire Diesel Pump 104.6 82.5 85.3 92.2 95.4 97 98 98 96.8

Residue Pumps 370 Onion Booster Pump 106.2 102.8 104.8 106.1 104.6 101.7 96.2 90.8 82.5

Residue Pumps Lake Booster pump 106.2 102.8 104.8 106.1 104.6 101.7 96.2 90.8 82.5

Residue Pumps Sand Booster Pump 2 111.3 91.3 94.2 92.8 102.9 104.9 106.8 103.2 93.2


1403401-1-100 Rev 0 | March 2019 Page 59 of 63


Overall

Sound

Power

[dBA]



Sand Filtration Plant No. 1 Sump Pump 95 88.4 97.1 96.4 90.2 91 85.2 81.4 77

Sand Filtration Plant No 13 Sand booster pump 100.6 93.6 100.7 96 95 94.8 93.8 93.3 85.8

Sand Filtration Plant Mud Dilution Pump #2 101.5 96 98.9 97.7 97.2 97.6 93.3 91 85.4

Sand Filtration Plant Overflow Pump #1 103.7 108 106.9 102.7 98.9 98.9 96.3 93.1 87.1

Sand Filtration Plant Mud Overflow Pump 2 104.9 106.5 104.8 100.9 96.8 102.6 95.6 93.3 87.9

Sand Filtration Plant No. 1 Overflow Pump 113 93.9 103 101.6 101.2 108.4 108.4 103 98.5

Stockyard 197 Conveyor 100.7 97.5 96 100.3 98.7 96 90.8 85 84.4

Stockyard 441 Drive 102.3 94.9 100.6 102.3 93.8 99.7 93.9 89.7 83.6

Stockyard 442 Drive 102.3 94.9 100.6 102.3 93.8 99.7 93.9 89.7 83.6

Stockyard 8240 - Combustion Fan & Forced Draft Fan 103.8 98.1 97.2 99 99.6 100.2 95.2 92.9 89.4

Stockyard 171 Conveyor Drive 104 96 99.1 107.2 101.2 96.3 94 88.2 84.7

Stockyard 271 Conveyor Drive 104.2 96.8 101 107.4 103.7 96.6 93.6 87.8 83.1

Stockyard 395 Conveyor Drive 105 97.4 101.3 99.3 96.6 100.8 98.9 95.1 91.3

Stockyard 497 Conveyor Drive Motor 105 97.4 101.3 99.3 96.6 100.8 98.9 95.1 91.3

Stockyard 441 Drive Motor 105.5 98.5 101.3 102.5 98.5 101.8 98.7 94 90

Stockyard 442 Drive Motor 105.5 98.5 101.3 102.5 98.5 101.8 98.7 94 90

Stockyard C1 Conveyor 107.7 94.5 100.5 106.7 104 101.1 101.9 95.3 89.8

Stockyard 297 Conveyor 108.1 94.9 100.8 107.1 104.4 101.5 102.3 95.7 90.2

Stockyard 497 Conveyor 108.9 95.8 101.7 108 105.3 102.3 103.1 96.6 91.1

Stockyard 297 Conveyor Drive Motor 109.1 100.3 103.5 100.9 99.8 107 100.1 93.4 91.4

Stockyard BWR 1 Stacker 110.3 108.6 109.1 107 104.2 102.8 103 103.8 101.2

Stockyard BWR 2 Stacker 110.3 108.6 109.1 107 104.2 102.8 103 103.8 101.2


1403401-1-100 Rev 0 | March 2019 Page 60 of 63


Overall

Sound

Power

[dBA]



Stockyard Train Loading Stacker 110.3 108.6 109.1 107 104.2 102.8 103 103.8 101.2

Stockyard C2 Conveyor 111.1 98 103.9 110.2 107.5 104.5 105.3 98.8 93.3

Stockyard 441 Rolls Crusher 111.3 105.3 108.5 105.5 103.8 107.4 104.8 100.6 100.4

Stockyard 8240 Transfer Station HPU 111.4 95.1 94.7 99 109.5 106.6 100.6 100.1 101.1

Stockyard 8240 Transfer Station 111.6 109.4 111.4 108 107.5 106.4 104.8 100.9 99.3

Stockyard BWR 2 Reclaimer 112 113.7 114.1 110.3 109.6 106.5 104.4 99.8 97.5

Stockyard Train Loading Reclaimer 112 113.7 114.1 110.3 109.6 106.5 104.4 99.8 97.5

Stockyard Train Loading Conveyor 112.2 99 105 111.3 108.6 105.6 106.4 99.9 94.4

Stockyard 395 Conveyor 113.2 100 106 112.3 109.6 106.6 107.4 100.9 95.4

Stockyard 8250 Transfer Station 115 113.5 114.2 114.5 107.9 110.1 108.5 104.7 102

Stockyard 195 Conveyor 115.6 102.5 108.3 114.7 112 109 109.8 103.3 97.8

Stockyard 295 Conveyor 115.6 102.4 108.4 114.7 112 109 109.8 103.3 97.8

Stockyard B Conveyors 119.4 106.2 112.1 118.4 115.7 112.8 113.5 107 101.5



Super Thickener Super Thickener - FCV-THK-FD1 - Piping 87.1 78.1 83.5 84.2 83.4 84.7 77.1 71 62.6

Super Thickener Super Thickener Building 91.1 83.4 85.2 84.9 88.6 87.2 83.1 76 60.4

Super Thickener 259-FMP002 - No. 2 Metering Pump Floccul 93 84.1 86.8 85 84.5 92.3 82.4 78.9 71.7

Super Thickener 259-PWP002 - Low Pressure Packing Water 93 84.1 86.8 85 84.5 92.3 82.4 78.9 71.7

Super Thickener 259-PWP012 - High Pressure Packing Water 93 84.1 86.8 85 84.5 92.3 82.4 78.9 71.7

Super Thickener Sand Surge Pump #1 100.6 102.2 100.6 99.9 96.8 93.8 93.1 92 87.9

Super Thickener Super Thickener Rake Drive 1A/1B 101.3 89.8 86.2 99.9 101.1 95 93.4 84.6 79.9


1403401-1-100 Rev 0 | March 2019 Page 61 of 63


Overall

Sound

Power

[dBA]



Super Thickener Wash Water Booster Pump 1 103.1 93.2 94.4 96.3 96.8 99.3 96.6 92.2 89.5

Super Thickener 259-MP022 - Mud Booster Pump 104.8 93.3 95.3 98.3 102.5 100.3 98.2 89.9 82.4

Super Thickener Super Thickener Piping 109.6 90.3 92.9 104.4 107.8 107.4 98.9 86.8 78.5


1403401-1-100 Rev 0 | March 2019 Page 62 of 63

Appendix B Noise Contours

Figure B-1 : Worst-Case Night-Time Predicted Noise Levels for the Base Case Model


1403401-1-100 Rev 0 | March 2019 Page 63 of 63

Figure B-2 : Worst-Case Night-Time Predicted Noise Levels for the Efficiency Project



Attachment 9 – Proposed Fee Calculation

Home

Industry Licensing System

Application Page 3 of 5Works Approval Fees

Fee start date 09/04/2019

Fees calculator

If you are applying for a works approval you must provide the following details in accordance with the Environmental Protection Regulations 1987. Guidance on calculating works approval fees is available on the DWER website.

Fees relate to the cost of the works, including all capital costs (inclusive of GST) associated with the construction and establishment of the works proposed under the works approval application. This includes, for example, costs associated with earth works, hard stands, drainage, plant hire, equipment, processing plant, relocation of equipment and labour hire.

Costs exclude:

land purchase costs

Premises Component(s)

Category Capacity Range Fee

46 - Bauxite Refining More than 1 000 000 tonnes per year N/A Remove

Selection required Select capacity range Add

Total Premises Component(s) N/A

Premises construction cost

Total cost Rate

More than $95,000,000 1405

Calculate

Total Fee

Total Works Approval Fee $57043.00

Back Exit Continue

(C) Copyright 2007 Department of Water and Environmental Regulation

Page 1 of 1Industry Licensing System - Department of Water and Environmental Regulation

12/03/2019https://ils.dwer.wa.gov.au/

Pinjarra Alumina Refinery – Efficiency Project

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