Preliminary Site Investigation Part 2
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Eco Logical Australia METRONET Morley-Ellenbrook Line Preliminary Site Investigation Part 2: Malaga to Ellenbrook Section MEL-MNO-COFF-EN-RPT-0011
04 May 2020
This page has been left intentionally blank METRONET Morley-Ellenbrook Line Preliminary Site Investigation Part 2: Malaga to Ellenbrook Section
Prepared for Eco Logical Australia
Prepared by Coffey Services Australia Pty Ltd Level 1, Bishops See, 235 St Georges Terrace Perth WA 6000 Australia t: +61 8 6218 2100 f: +61 8 6218 2222 ABN 55 139 460 521
04 May 2020
MEL-MNO-COFF-EN-RPT-0011
754-PEREN233882 Quality information Revision history
Revision Description Date Originator Reviewer Approver Draft A Draft 07/02/2020 Geri Matthew Pethebridge/Nick Chenery Taylor Draft B Draft for client review 13/02/2020 Nick Taylor Matthew Matthew Chenery Chenery Draft C Draft for client review 17/02/2020 Nick Taylor Cameron Cameron Baldock Baldock Rev0 Issued for Use 20/04/2020 Nick Taylor Cameron Cameron Baldock Baldock Rev1 Issued for Use 04/05/2020 Nick Taylor Cameron Cameron Baldock Baldock
Distribution
Report Status No. of copies Format Distributed to Date Rev0 1 PDF METRONET and ELA 20/04/2020 Rev1 1 PDF METRONET and ELA 04/05/2020
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Executive Summary
Coffey Services Pty Ltd (Coffey) were engaged by EcoLogical Australia (ELA) to undertake a Preliminary Site Investigation (PSI) for contamination along the alignment Development Envelope (DE) of the Morley-Ellenbrook Line (MEL).
The development of the MEL project is being led by the METRONET office, while the Public Transport Authority (PTA) of Western Australia is the projects formal proponent.
For the purpose of this study, and at the request of the PTA, the PSI has been completed in two sections, known as Part 1 and Part 2. This report covers the Part 2 area referred to as the Malaga to Ellenbrook Rail Works.
The main objective was to undertake a PSI to identify the presence of possible contaminating activities, as a result of both historical or current land use, that may have implications on the construction of the MEL project.
The Scope of Works (SoW) consisted of three main elements:
A broad desktop assessment of the study area;
A targeted desktop assessment for selected areas within the study area; and
Targeted site inspections within selected areas of the study area.
A review of available information led to the creation of a Conceptual Site Model (CSM) for the study area, which found that the main land uses associated with the majority of known and potential sources of contamination across the study area were past water treatment and disposal (landfill) facilities, agriculture and road infrastructure. Another major risk identified was the potential for Acid Sulfate Soil (ASS) generation particularly considering the number of wetland areas throughout the study area. Secondary risks were associated with uncontrolled fill and fly tipping activities.
The main exposure risks were identified as dermal contact, ingestion and vapour inhalation by current and future site users and workers and vertical and lateral flow of contaminated groundwater to groundwater users and surface water features such as wetlands. A number of management plans will be required to manage the identified risks during construction and a review of the results of upcoming site investigations at the former Gnangara Waste Facility should be undertaken when considering the appropriate management measures for groundwater during excavation and dewatering works associated with the construction of the new road bridge at the Gnangara Road and Drumpellier Drive intersection. A summary of the data gaps identified and the recommended actions to address them are presented in Table E-1 below.
Table E-1: Identified data gaps and recommendations
Site Data Gap Identified Recommendations Lexia Liquid Waste Disposal Site The full extent of waste material It is understood that further works (Landfill) Gnangara, located within has not been delineated and the are to be undertaken by GHD on reserve State Forest 65, Lexia WA soil contamination has not been behalf of DPLH. These should 6065 and Lot 811 on deposited clearly defined. Groundwater further assess the presence of plan 405371 (233 Drumpellier contamination has not been waste materials and the extent of Drive) laterally and vertically delineated in soil contamination and improve the any direction. definition and delineation of the groundwater plume. The requirements for further works to assess risk to the MEL project should be determined based on the outcomes of the GHD investigations.
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Site Data Gap Identified Recommendations A Groundwater Management Plan (GMP) should be compiled to manage the risks associated with groundwater abstraction in this area. Intensive agriculture including There are no classified sites within If excavation works take place in feedlots and saleyards, (i.e. Swan the Development Envelope and no the vicinity or down hydraulic Valley Egg Farm) known contamination. However, gradient of any identified intensive there is potential for contamination agricultural source then it is to be encountered in soil and recommended that soil and groundwater if excavation works groundwater testing should be take place in areas of intensive undertaken for Potential agricultural use, (i.e. Swan Valley Contaminants of Concern, (PCoCs) Egg Farm is within the associated with this land use to Development Envelope). assess risks to the project. Entire study area More targeted investigations may Target investigations have be required based on results of occurred across the alignment (Acid Sulfate Soils – ASS) recent ASS investigations, which however, an ASS Management can then be used to fully assess Plan should be developed together the risk posed by ASS to help with further targeted investigations inform an adequate ASS in areas of high risk, if required. Management Plan. Engineering consideration should also be given to the risk to built structures, i.e. potential deterioration of pilings and foundations. Entire study area Assessment of areas of potential Formulation of a Construction fly-tipping required. Environmental Management Plan, (Fly Tipping) (CEMP) or similar with management measures for dealing with fly tipping when this occurs. Entire study area Both the extent and likelihood of Compilation of CEMP, or similar to encountering uncontrolled fill deal with unidentified contaminated (Uncontrolled fill) material is currently unknown. soils where these are encountered. Entire study area Extent and likelihood of Compilation of CEMP for uncontrolled fill and fly tipping management of risks associated (Road Infrastructure) associated with road infrastructure with site run-off, unidentified is currently unknown. Control contaminated soils and fly tipping measures for dealing with surface and compilation of a Groundwater run-off also required. Management Plan (GMP) for areas affected by groundwater contamination and where deep excavation and dewatering works are required.
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Table of contents
Executive Summary ...... ii Table of contents ...... iv 1. Introduction ...... 1 1.1. Project Understanding ...... 1 1.2. Objectives ...... 1 1.3. Scope of Work ...... 2 1.3.1. Assessment 1: Broad desktop assessment within the study area ...... 2 1.3.2. Assessment 2: Targeted desktop assessment of selected areas within the study area 3 1.3.3. Assessment 3: Targeted site inspection – selected areas within the study area. 3 1.3.4. Report Structure ...... 3 2. Methodology ...... 5 2.1. Data Review ...... 5 2.2. Site Inspections ...... 6 3. Site Information ...... 7 3.1. Site Identification ...... 7 3.2. Surrounding Land Uses ...... 7 3.3. Environmental Setting ...... 8 3.3.1. Topography ...... 8 3.3.2. Regional Geology ...... 8 3.3.3. Acid Sulfate Soils ...... 8 3.3.4. Regional Hydrogeology ...... 9 3.3.5. Groundwater Bore Search...... 10 3.3.6. Surface Water Bodies ...... 10 4. Site History ...... 12 4.1. Certificates of Title ...... 12 4.2. Historical Aerial Imagery ...... 13 4.3. Dangerous Goods Records ...... 14 4.4. Council Records ...... 14 4.5. Heritage Records ...... 15 4.5.1. Aboriginal Heritage ...... 15 4.5.2. European Heritage ...... 16 4.6. Previous Environmental Assessments ...... 16 5. Contaminated Sites Information Review ...... 20 5.1. Contaminated Sites Databases...... 20 6. Site Inspections ...... 24 7. Preliminary Conceptual Site Model ...... 26 7.1. Source Assessment ...... 26
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7.1.1. On-site ...... 26 7.1.2. Off-site ...... 26 7.2. Pathway and Receptor Assessment ...... 26 7.2.1. Potential Migration Pathways ...... 26 7.2.2. Potential Receptors ...... 27 7.3. Qualitative Risk Assessment ...... 27 7.3.1. Source-Pathway-Receptor Linkage Assessment ...... 27 7.4. Summary of CSM Linkages ...... 39 7.4.1. Data Gaps based on complete SPR linkages ...... 41 8. Discussion ...... 43 9. Conclusions ...... 46 10. Recommendations...... 47 11. References ...... 48
Tables
Table 2-1 Data Review Methodologies Table 3-1 Summary of Surrounding Land Uses Table 4-1 Certificates of Title within the study area Table 4-2 Historical Aerial Photograph Summary Table 4-3: Results of Council Record Reviews Table 4-4: Aboriginal Heritage Sites Table 4-5: key relevant reports to environmental quality Table 5-1: Summary of Contaminated Sites within the study area Table 6-1: Site Inspection Summary Table 7-1: Source-Pathway-Receptor Linkages for Contamination associated with the Whiteman Park and Drumpellier Road area Table 7-2: Summary of CSM linkages Table 7-3: Identified data gaps
Figures
Figure 1: Locations Map Figure 2: DWER Groundwater Bore Search Results Figure 3: Geomorphic Wetland Map Figure 4: Contaminated Sites Identification Map Figure 5: Acid Sulfate Soil Risk Map
Figure 6: Groundwater Contour Map
Figure 7: Drinking Water Supply Information
Figure 8: Heritage Sites
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Statement of Limitations
Appendices Appendix A - Basic Summary of Records Appendix B – Groundwater Bore Search Appendix C – Certificates of Title Appendix D – Aerial Photography Appendix E – DMIRS Search Results
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METRONET Morley to Ellenbrook Line Preliminary Site Investigation
1. Introduction
Coffey Services Australia Pty Ltd (Coffey) was commissioned by Eco Logical Australia (Eco Logical), who are acting on behalf of METRONET, to undertake a Preliminary Site Investigation (PSI) for contamination along the alignment Development Envelope (DE) of the Morley-Ellenbrook Line (MEL),
The MEL, a component of the State government’s METRONET program, will connect the existing Midland Line to Perth’s northeast suburbs, terminating in Ellenbrook. The development of the MEL project is being led by the METRONET office, while the Public Transport Authority of Western Australia (PTA) is the projects formal proponent.
For the purpose of this study, and at the request of PTA, the PSI has been completed in two sections, known as Part 1 and Part 2. The Part 1 consists of the Bayswater to Malaga Rail Works, while Part 2 consists of the Malaga to Ellenbrook Rail Works. Parts 1 and 2 are divided by the eastern boundary of the Tonkin Highway road reserve in the Malaga area as defined in the Metropolitan Region Scheme (MRS) road reserve. This is consistent with the Environmental Protection Agency (EPA) referral boundaries. This report focusses on the Part 2 (Malaga to Ellenbrook Rail Works) referral area only, which is presented in Figure 1. The Part 2 referral area (DE) is referred to as the ‘Study Area’. 1.1. Project Understanding
A route commencing at Bayswater Station on the Midland Line has been identified. The approximately 21 km railway will follow the centre median of Tonkin Highway, heading north through the Reid Highway interchange, before leaving the median in Malaga between Marshall road and Hepburn Avenue. From Malaga, the alignment will turn east across the southern part of Whiteman Park, before heading north along the eastern side of Whiteman Park adjacent to Drumpellier Drive (formerly Lord Street). After crossing Gnangara Road, the alignment will follow an existing reservation into the centre of Ellenbrook, terminating near Arbor Drive. The vertical alignment of the railway has yet to be finalised, but may include underpasses, bridges, cuttings and/or raised embankments.
A number of additional railway stations are proposed to be constructed along the alignment, in addition to upgrades to Bayswater Station, including:
Morley Station; Noranda Station; Malaga Station; Bennett Springs East Station; Whiteman Park Station; and Ellenbrook Station.
The proposed MEL alignment sits within a wider area known as the DE, which is a larger footprint area over the entire MEL alignment.
The MEL project is likely to require a number of environmental approvals, in addition to addressing requirements of the Contaminated Sites Act 2003, which forms the purpose of this PSI. 1.2. Objectives
The overarching objective is to undertake a PSI to identify the presence of possible contaminating activities, as a result of both historical or current land use, that may impact the MEL project within the study areas to inform two separate referrals (Bayswater to Malaga Rail Works (Part1) and Malaga to Ellenbrook Rail Works (Part 2)). The technical objectives include:
Identify potential contaminating activities which could have, or are known to have, resulted in soil and/or groundwater contamination that may pose a risk to the construction phase of the MEL project;
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Identify possible constraints to the current MEL alignment design as a result of potentially contaminated sites, and its implications to planning; Develop a conceptual site model identifying any possible source-pathway-receptor linkages along the alignment; and Identify residual data gaps and make recommendations on the requirements for further intrusive investigations in the form of Detailed Site Investigations (DSIs). 1.3. Scope of Work
As outlined within the SoW document, the PSI process generally includes the assessment of desktop information such as publicly available database information and requests for targeted information from various government organisations to ascertain whether particular sites have undertaken potentially contaminating activities, and therefore the potential for contamination to be present.
The regulatory guidelines that govern the PSI process are primarily designed to cater for single- property based sites. Owing to the size of the study area, an alternative approach was required to provide an adequate overview of the risk posed by contamination to rail construction activities. This was primarily guided by information sourced from the Department of Water and Environmental Regulation (DWER) Contaminated Sites Database, which identified a number of registered sites of concern. A high-level review of aerial photography was then undertaken to identify any other sites of concern within the study area. These were followed by a site walkover survey (site inspection) to inspect both registered sites that were thought to represent a high risk and any other sites of concern. If necessary, a more comprehensive review of selected government databases would then be undertaken.
Three assessments were undertaken for each PSI as detailed below.
1.3.1. Assessment 1: Broad desktop assessment within the study area
The broad desktop assessment included:
A high-level review of all client provided investigation reports that relate to sites within the study area boundary. A review of zoning information. A broad site historical aerial review. A review of the contaminated sites database to identify properties which are currently classified under the Contaminated Sites Act 2003 into any of the following categories within the study area:
Contaminated – restricted use (C-RU);
Remediated for restricted use (RRU); or
Contaminated – remediation required (CRR). Assessment of groundwater users and licenced/registered groundwater abstraction bores through searches of:
DWER – Water Information Reporting (WIR) database; and
DWER – Water Register; Surface water body and wetland database searches; Regional groundwater mapping:
DWER – Perth Groundwater Atlas; and
Client-provided information reports. Heritage searches:
Department of Planning, Lands and Heritage (DPLH) – Aboriginal Heritage Inquiry Database; and
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Department of Environment and Energy (DoEE) – European Heritage Database.
1.3.2. Assessment 2: Targeted desktop assessment of selected areas within the study area
Additional detailed searches were undertaken on higher-risk sites, which will include the following:
A search for prescribed premise licences; Assessment of historical ownership and land use (Landgate):
High level review of individual historical aerial photographs; and
Historical certificates of title (CoT), if applicable. Dangerous goods records searches (Department of Mines, industry, regulation and Safety (DMIRS); Local council records searches relating to zoning details, service infrastructure, planning approvals for possible contaminating structures and complaints at the site. 1.3.3. Assessment 3: Targeted site inspection – selected areas within the study area
Based on the results of the desktop assessments, site inspections were undertaken across the study area. This focussed on all registered sites, excluding those that were decontaminated, together with observations of surrounding land uses and any other high priority sites identified on the high-level review of aerial photography. The site inspections consisted of the following:
Confirmation of current site use;
Confirmation of the presence and condition of on-site infrastructure, (i.e. fuel storage tanks and drainage systems);
Identification of obvious visual or olfactory evidence of contamination;
Identification of contaminating site processes;
Assessment of storage of hazardous substances and housekeeping practices;
Identification of sensitive nearby land uses in the study area.
The results of the site walkover were used to assess the level of additional investigations that may be required in high risk areas to fully assess the risks posed by contaminated soils and groundwater.
1.3.4. Report Structure
This PSI report is prepared for the Part 2 study area detailing the findings of the assessment, and includes the following information:
Site history (review of historical aerial photography and CoTs etc); Environmental setting (local geology, hydrogeology, nearby surface waters etc); Findings of the site inspection including a photographic record; Details on identified potentially contaminating activities and associated contaminants of potential concern (COPC) at the site and surrounds; Development of an initial CSM outlining any identified source(s), pathway(s) and receptor(s) and linkages between them; Details on the possible constraints on the design and planning of the currently proposed MEL alignment;
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Identification of any data gaps requiring additional investigation (i.e. detailed site investigations); and Conclusion and recommendations for any future works.
Given the limitations in approach, the report will be prepared in general accordance with the following guidelines:
National Environment Protection Council (NEPC) National Environment Protection (Assessment of Site Contamination) Measure (NEPM) (Schedule B2): Guideline on Data Collection, Sample Design and Reporting (NEPC, 1999) (as amended in May 2013). DWER (2014) Assessment and Management of Contaminated Sites – Contaminated Sites Guidelines, Western Australia.
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METRONET Morley to Ellenbrook Line Preliminary Site Investigation
2. Methodology 2.1. Data Review
The data review comprised a review of historical information provided by Eco Logical via METRONET, registered licence abstraction databases, published geological and hydrogeological maps and the DWER Contaminated Sites Database. The methodology of the data review is outlined below in Table 2-1 below.
Table 2-1 Data Review Methodologies
Activity Details Review of METRONET have provided relevant historical information pertaining to the site. This has historical included: Information Past site investigation reports that are relevant to the study area; DWER GIS data relating to the geographical position, classification and identification of registered contaminated sites not available in the contaminated sites database; Historical aerial photography sourced from Landgate and current aerial photography taken from Google Earth.
Coffey conducted relevant online searches in-order to assess relevant historical information. Bore Searches For each location within the study area, a search of the DWER Water Information Reporting online database (http://wir.water.wa.gov.au/Pages/Water-Information -Reporting.aspx) and the online mapping tool we undertaken. The Water Register (https://maps.water.wa.gov.au/#/webmap/register) was conducted to identify the presence of abstraction bores within 500 m radius of the study area. Bores identified within the vicinity of the study area are presented on Figure 2. Searches of Geological information pertaining to the study area was gathered from the Geological Geological Survey of Western Australia on line mapping tool Conditions (https://geoview.dmp.wa.gov.au/GeoViews/?Viewer=GeoView) and the Australian Governments National map (accessed: https://nationalmap.gov.au/). Searches of A search of the DWER Perth Groundwater Atlas (accessed: hydrological https://maps.water.wa.gov.au/#/webmap/gwm) was conducted to ascertain the depth to conditions groundwater and direction of groundwater flow over the study area. However, this information was complemented by actual site monitoring data gained from bores installed by Coffey in October 2019. Acid Sulfate Acid Sulphate Soil (ASS) risk mapping (accessed online www.asris.csiro.au, January 2020) Soils indicates that the site is in an area with a mostly moderate to low risk of ASS occurring. However localised areas of high to moderate are present in places. Search of A search of DWER’s Contaminated Sites Database Contaminated https://dow.maps.arcgis.com/apps/webappviewer/index.html?id=x2ecb7429ae4da2ac32c441 sites database 819c6d47) was conducted to identify any sites classified under the CS Act (2003). It should be noted that the database only includes sites that are classified as ‘Contaminated - remediation required’ (C-RR), ‘Contaminated – restricted use’ (C-RU) and ‘Remediated for restricted use’ (RRU). Information on other designated sites was requested from DWER separately as part of a formal information request. Basic summary of records (BSRs) for all sites of interest have been included in Appendix A. Dangerous Information was requested from the Department of Mines, Industry Regulation and Safety, Goods (DMIRS) regarding licences to hold dangerous goods on sites. This was limited to sites that have been classified under the CS Act 2003. Search for The National Maps database was used to identify any surface water bodies within 100 m of nearby the study area (https://nationalmap.gov.au/). Reference was also made to Landgate’s surface water Geomorphic wetlands of the Swan Coastal Plain database (15 February 2019). bodies Water bodies and geomorphic wetlands in the vicinity of the study area are shown on Figure 3 attached.
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METRONET Morley to Ellenbrook Line Preliminary Site Investigation
Activity Details Local For each sub area of the study area, a search of the Department of Planning, Lands and planning Heritage (DPLH) local planning schemes website (https://www.planning.wa.gov.au/Local- scheme planning-schemes.aspx) was conducted to identify the current zoning of properties within searches and surrounding the study area. Council Information was requested from council archives for selected high risk sites throughout the Records study area, which included the following: Requests Development application (DA) information, particularly relating to infrastructure/buildings that may be a potential source of contamination (e.g. storage tanks, fibro buildings etc); Complaints history of sites; Any zoning restrictions specifically applied to the site (e.g. flood prone, suspected contaminated land).
Certificates of A search of the Landgate database was undertaken via their website, Title (CoTs) (www.landgate.wa.gov.au) to source all relevant Certificates of Title. This was only undertaken for those classified by DWER under the CS Act 2003. Heritage Searches were undertaken of the Aboriginal Heritage Inquiry System Database and also the Heritage Council of Western Australia (2020) State Heritage Register for European Heritage both through from the Department of Planning, Lands and Heritage, (www.dplh.wa.gov.au).
2.2. Site Inspections
The site inspections were undertaken on 21st January 2020 by Coffey Senior Hydrogeologist Nick Taylor. The site inspections were primarily focussed on known sources of contamination represented by classified sites identified within the DWER Contaminated Sites Database. Observations were also made of potential sources of contamination in the surrounding areas of these sites.
Each site and its surroundings, (where applicable) were viewed externally with photographs of the outside areas with key observations made relating to current land use, storage, housekeeping, drainage, visual and olfactory evidence of contamination and the presence of fuel dispensing facilities and evidence of chemicals storage. The results of the inspections were used to assess the level of additional investigations that may be required in high risk areas to fully assess the risks posed by contaminated soils and groundwater. A photographic log of the inspected sites and surrounding areas is presented in Appendix B.
An HSSE Plan was developed and implemented by Coffey during the site inspection survey and included an Environmental Safe Work Method Statement (ESWMS) for all tasks performed.
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METRONET Morley to Ellenbrook Line Preliminary Site Investigation
3. Site Information 3.1. Site Identification
The study area is 500.8 Ha in size and is located within the City of Swan and the Shire of Chittering. It extends from the north of the Reid Highway and Tonkin Highway interchange on Hepburn Avenue, across the southern end of Whiteman Park eastwards toward Bennett Springs, crossing Bennett Brook. It then turns north and follows Drumpellier Drive via Whiteman and Brabham, across Gnangara Road and into Ellenbrook. The location of the study area is presented in Figure 1.
The study area contains three sites that have been classified by DWER under the Contaminated Sites Act 2003. The location of these and their classification are presented in Figure 4. 3.2. Surrounding Land Uses
The study area extends approximately 12.5 km and contains a variety of different surrounding land uses, including residential, commercial, public open space, road infrastructure, reserve land and bushland. For the purpose of this investigation surrounding land use will be detailed broadly in Table 3 below.
Table 3-1 Summary of Surrounding Land Uses
Direction Description North Predominantly residential land use and then native undeveloped bushland.
(North of Ellenbrook) East (Malaga Predominantly residential land use together with the old RAAF transmission station, which is Station to also currently being redeveloped for predominantly residential purposes. Whiteman Park Station) (Whiteman Mixture of residential and agricultural land uses. Park Station to Gnangara Road Intersection) (Gnangara Predominantly residential land use with commercial land use around the area of Ellenbrook Road to Station. Ellenbrook) South Predominantly residential land use with minor agricultural land use.
(South of Whiteman Park) West (Malaga State Reserve Area (Whiteman Park). Station to Whiteman Park Station) (Whiteman State Reserve Area (Whiteman Park) Park Station to Gnangara Road Intersection)
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METRONET Morley to Ellenbrook Line Preliminary Site Investigation
Direction Description (Gnangara State Forest Area. Road to Ellenbrook)
3.3. Environmental Setting 3.3.1. Topography
The Malaga to Ellenbrook Rail Works study area passes through gently undulating terrain associated with the Bassendean Sands and Guildford Clays. Small sections of the alignment cross narrow alluvial streams and low-lying marshlands generally associated with interdunal swales within the Bassendean Dunes. The elevation of the natural surface is generally between 20 to 45 m AHD, gently increasing in elevation from south to north along the alignment. Surface water is expected to follow the natural and created features of the landscape, with the majority of water likely to infiltrate surficial sandy soil with surface and subsurface flows towards low lying features e.g. wetlands or streams.
3.3.2. Regional Geology
The project is situated in the northern part of the Perth Basin, comprising deeper Jurassic and Cretaceous age sediments overlain by late Tertiary and quaternary age sediments.
The study area traverses predominantly across superficial deposits of Bassendean Sands, a geological unit characterised by pale grey to white sub-rounded quartz sand, predominantly medium grained, however can exhibit material ranging from fine to coarse grain. A layer of friable, limonite- cemented sand, colloquially called ‘coffee rock’, occurs throughout most of the area near the water table. The Bassendean sands uncomformably overlie the sedimentary rock sequence, namely the Guildford Formation, of the Perth Basin that sit on the Precambrian crystalline rocks of the Yilgarn Craton (Davidson, 1995). Low lying areas are likely to accumulate alluvial sediments with varying organic content and may contain peaty material.
3.3.3. Acid Sulfate Soils
The majority of the study area is shown as being classified as a moderate to low risk of Acid Sulfate Soils (ASS) occurring within 3 metres of the natural surface. There are four areas across the study area where there is a high to moderate risk of ASS occurring within 3 metres of the natural surface. These are noted to occur in the following areas;
Southwestern corner near Marshall Road;
Area around Bennett Brook;
Area west of Drumpellier Drive and Harrow Street;
Area north of Whiteman Park Station.
The information presented in Figure 5 is taken from a public database and is an estimation of the likelihood of ASS occurring throughout the study area. However, Coffey were engaged by METRONET to undertake targeted preliminary investigations throughout the study area to produce a more detailed assessment of the actual risks of ASS occurrence. The results of these studies are available as separate reports. The presence of extensive wetland features throughout the Whiteman Park area and their associated sediments is likely to mean a significantly higher potential for ASS. Investigations for the nearby Northlink Project also showed elevated potential for ASS in the area (Coffey, 2015).
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METRONET Morley to Ellenbrook Line Preliminary Site Investigation
3.3.4. Regional Hydrogeology
Groundwater Levels/Elevations
The study area is situated within a portion of the Gnangara Mound, a major shallow groundwater resource which provides a significant portion of drinking water supply for the Perth region. The groundwater beneath the alignment exists within a shallow unconfined superficial aquifer (Davidson, 1995). Superficial aquifers typically comprise Bassendean Sands overlying Guildford Formation and Ascot Formation. In a localised context, groundwater flow is expected to conform to significant topographical features, flowing towards interspersed surface water bodies and low-lying areas, such as Bennett Brook. The alignment lies within a number of Gnangara Underground Water Pollution Control Areas (GUWPCA).
Across the majority of the alignment groundwater flow is from the Gnangara Mound in a south- easterly direction with groundwater discharging into Ellen Brook to the east of Bennett Brook to the South. A groundwater contour map showing flow direction across this part of the alignment is presented as Figure 6.
Depth to groundwater is highly variable across the MEL alignment, and is largely related to topography, with the shallowest depth to groundwater found in the low-lying areas, typically those in the north of the study area. Based on information from the Perth Groundwater Atlas (DWER, 2019b), depth to groundwater across the northern portion of the alignment is relatively shallow, around 1.5 to 4 mbgl. The occurrence of a perched groundwater table may also occur where underlying clays, peat or iron-cemented sands create a confining layer. Data obtained by Coffey during groundwater monitoring events in 2019 show a reasonable correspondence with the database with groundwater levels measured between around 0.6 mbgl and around 6.5 mbgl with deeper levels measured to the very north of the study area of around 12 mbgl.
Drinking Water
DWER Perth Groundwater Map (2019) indicated that the development envelope is within P1, P2 and P3: Gnangara Underground Water Pollution Control Areas, which are Public Drinking Water Source Areas (PDWSAs). The location of PDWSAs within this area of the alignment are presented in Figure 7.
Beneficial Use of Groundwater
DWER Perth Groundwater Map (2019) indicates that groundwater salinity beneath the study is likely to range between 250 milligrams per litre (mg/L) and 500 mg/L indicating fresh water suitable for drinking. Recent sampling undertaken by Coffey recorded levels of Total Dissolved Solids (TDS) between 60-886 mg/L, which approximately corresponds to values reported by the DWER database. Groundwater in the area has a high risk of iron staining.
Groundwater from the Gnangara Mound is used to support domestic, environmental, recreational, commercial (horticulture and agriculture) and industrial needs. The Gnangara Mound is currently the most significant source of groundwater for the Perth region (supplying more than 40% of the water supply) as well as vital part of groundwater dependent ecosystems and is classified a PDWSA. The study area is within the vicinity of a number of PDWSAs and Well Head Protection Zones (WHPZ) of the GUWPCA, each of which include a number of priority areas as defined by DWER, (DoW, 2016). These include:
Priority 1 – areas that are defined and managed to ensure no degradation of the drinking water source occurs. These areas contain the greatest restrictions on land use and activity and aim to avoid all risks to the drinking water source. P1 areas occur within PDWSAs where the existing land uses have low risks to PDWSAs and changes of land use that introduce additional risks are not recommended. P1 areas would typically include Crown land, but may also include some private land.
Priority 2 – areas are defined and managed to maintain or improve the quality of the drinking water source with the objective of risk minimisation. P2 areas occur within PDWSAs where the
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METRONET Morley to Ellenbrook Line Preliminary Site Investigation
land is zoned rural and the risks need to be minimised. Low levels of development consistent with the rural zoning are considered appropriate (generally with conditions) in P2 areas.
Priority 3 – areas defined and managed to maintain the quality of drinking water resources for as long as possible with the objective of risk management. P3 areas occur within PDWSAs where the land is zoned for urban and commercial or light industrial uses. These are principally areas where existing higher intensity land use co-exists with water supply sources. Key protection elements for P3 areas include the need for deep sewerage and implementing best management practices. WHPZs – circular zones established around groundwater wells to protect drinking water sources from contamination. In Priority 1 areas WHPZ have a radius of 500 m, in priority 2 and 3 areas the radius is 300 m. Special conditions, such as restrictions on storage and use of chemicals, may apply within these zones (DoW, 2006).
Six WHPZ intersect the study area, located within the northern and central areas. The locations of these WHPZs suggest that there is one production bore located within the study area (‘Morley- Ellenbrook Line Environmental Constraints Desktop Analysis’, ELA, May 2019).
3.3.5. Groundwater Bore Search
Coffey completed five DWER groundwater bore searches for the study area at approximately 0.5 km radius surrounding the study area in December 2019. The positions of these bores are shown on Figure 2 and the information is detailed in Appendix B as follows:
Licenced bore data: A search was undertaken using the DoW online mapping tool ‘The Water Register, licence and Water Availability information’ (DWER, 2019a). Registered bore data: A search was undertaken by requesting registered bore data from the DoW and by undertaking a search on the DoW online mapping tool water information reporting Database (DWER, 2019b). A total of 53 bores were identified, of which 23 are of unknown use, 22 were monitoring bores and 8 were for private use. Owing to the number of bores present across the study, it was not possible to establish the existence of all these features during the site inspections. However, the existence, location and use of bores that may be at risk from construction activities should be verified prior to construction taking place. 3.3.6. Surface Water Bodies
Surface water and wetlands are present and are considered to be associated with the intersection of the groundwater level with the ground surface in interdunal depressions or swales. However, some of these wetlands may also be perched groundwater in distinct areas or pockets of low permeability material either at or below the ground surface. Mapped surface water bodies and wetlands are shown in Figure 3.
Due to a large portion of the study area being located within a portion of the Swan Coastal Plain classified as a palusplain (seasonally waterlogged flats), there are extensive wetland features located within the Malaga to Ellenbrook Rail Works study area.
None of the identified wetlands are nationally or internationally important wetlands. A search of Landgate’s Geomorphic wetlands of the Swan Coastal Plain database (15 February 2019) identified 13 Conservation Category Wetlands (CCW), 6 Resource Enhancement Wetlands (REW) and 20 Multiple Use Wetlands (MUW) wetlands intersecting the study area. Table 4-2 of Eco Logical Australia (ELA) report entitled, ‘Morley-Ellenbrook Line Environmental Constraints Desktop Analysis’, dated May 2019 provides a summary of conservation significant wetlands intersecting the study area. Of the tabulated wetlands, all but one are located within the Malaga to Ellenbrook Rail Works study area.
The majority of the northern portion of the alignment within Ellenbrook has been highly modified by roads and commercial infrastructure. Therefore, surface water across the area is expected to flow into stormwater drainage systems and drainage sumps, with infiltration expected to occur within the landscaped portions of the highway verge. It is also understood that drainage from the east of the study area is also directed into Whiteman Park, as part of the Water Management Strategies. Within Coffey Services Australia Pty Ltd 10 ABN 55 139 460 521
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Whiteman Park, surface water runoff is predominantly directed into Bennett Brook, which emanates in the area to the north of Woolcott Avenue in Whiteman Park and flows south towards Marshall Road until eventually discharging into the River Swan upstream of Success Hill in Bassendean, (total length of around 13 km). Flow within the Bennett Brook is permanent all year round with an average flow of around 3 GL per year, (Department of Parks and Wildlife, 2014).
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4. Site History 4.1. Certificates of Title
The study area comprises land parcels of interest that are classified as ‘Possibly contaminated – investigation required’ and ‘Report not substantiated’. Details of the associated Certificates of Title (CoTs) for these sites are included in Table 4-1 below with the actual CoTs presented in Appendix C. The location of the sites are presented on Figure 4.
The Certificates of Title, (CoTs) are split into the following site classifications within the study area:
2 Possibly contaminated – investigation required;
1 Report not substantiated.
The Lexia Liquid Waste Facility only borders the study area. However, it is noted as the source site of contamination for Lot 811/Parcel 10960, a small part of which does extend into the study area, and it is also located upgradient of groundwater flow. Therefore, due to the potential risk that this site may pose to construction, it has been included within this PSI study.
Table 4-1 Certificates of Title within the study area
Lot Number Site Classification (CS Act Certificate of Title Parcel ID 2003) Lexia Liquid Waste Potentially contaminated – N/A – area classified as a 69260 Disposal Site (landfill) investigation required State Forest Gnangara, located within Reserve State Forest 65, Lexia WA 6065 (Source site for Lot 811 & Parcel 10960) Parcel 10960 = Road Potentially contaminated – PIN 1143 3278 10960 reserve: 650 m investigation required section of Gnangara Road, lexia west of the former Waste Water Disposal entrance at the junction (PIN 1154 3278) 2925/245 (Formerly 2136/556) Also noted as:
Lot 811 on deposited plan 405371 (233 Drumpellier Drive). Parcel 10961 = Northern section of Whiteman Park extending approximately 650 m by 500 m along Gnangara Road Lexia. Lot 607 on Plan 3698 Report not substantiated 209/56A 68749
53 Cheltenham St, Bennet Springs WA 6063
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4.2. Historical Aerial Imagery
A review of historical aerial photographs from Landgate was undertaken for the entire study area and the surrounds dating back to early 1950’s. Review of these photographs was undertaken to identify relevant site developments, features and changes over time. Copies of a selection of aerial photographs are provided in Appendix D with a summary of specific changes to high risk sites noted in Table 4-2 below.
Upon review of Historical Aerial Imagery, the main changes to the study area and surrounding land uses were as follows:
1953: Most of the land is native bushland except for the presence of the Gnangara liquid waste facility and an RAAF transmission station;
1989: Minor increase in agriculture otherwise no change;
2003: Large scale residential development in the areas of Bennett Springs, Henley Brook and Ellenbrook along with the development of Drumpellier Drive, (then Lord Street).
Current: Further residential development including in the Whiteman area. Minor increase in agriculture and commercial activities around Ellenbrook.
Table 4-2 Historical Aerial Photograph Summary
Photograph Observations Site Surrounding Land 1953 Lexia Liquid Waste Facility – Appears Appears to be predominantly native bushland with to be in use as managed fields used as RAAF transmission station to very southeast. discharge areas
53 Cheltenham Street: Native bushland 1989 No change Predominantly native bushland with minor agriculture. Minor residential development to southeast near RAAF transmission station. 2003 Lexia Liquid Waste Facility is now Large scale residential development to Northeast woodland or pasture. No evidence of of area (Henley Brook and Ellenbrook) and past activities. development of Drumpellier Road. Further residential development is also obvious within the 53 Cheltenham Street appears to still Bennett Springs area to the southeast of the old be either native bushland or agricultural RAAF transmission station. in nature. Current 53 Cheltenham Street appears to have Significant residential development in the one residential property in its north- Whiteman area, more residential development in eastern corner. the Bennett Springs area and some agricultural development along the eastern side of Marshall Road in Bennett Springs, south fo Whiteman Park. Increase in commercial development in Ellenbrook.
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4.3. Dangerous Goods Records
A Freedom of Information (FOI) request was submitted to the Department of Mines, Industry, Resources and Safety (DMIRS) on 13th January 2020 for 3 sites across the Malaga to Ellenbrook Rail Works study area. This request was focussed on sites that were classified as ‘Potentially Contaminated – Investigation Required’ and ‘Report not substantiated’, under the CS Act 2003. This request was submitted to search for the following documentation in relation to the sites:
Current and historical copies of licences to store dangerous goods;
Applications for licences to store dangerous goods;
Inspection reports;
Documentation pertaining to above ground or underground storage tanks (USTs).
DMIRS responded on 14th February 2020 confirming that the search did not return any documentation relating to the historical or current storage of dangerous goods or licences for the following 3 sites:
Lexia Liquid Waste Disposal Facility (Landfill) Gnangara, located within reserve State Forest 65, Lexia, WA, 6065;
Road reserve 650m section of Gnangara Road, Lexia, west of former Waste Water Disposal entrance at the junction, (PIN 1154 3278);
106 Bennett Springs Drive, Beechboro, WA, 6063, (Lot 106 on Plan 56775).
However, the lack of information does not necessarily mean that the property is not, or has never been, a dangerous goods storage site. Copies of the DMIRS responses are included in Appendix E. 4.4. Council Records
A review of council records for sites identified as having a higher risk for contamination was undertaken. The sites identified for more targeted assessment were located within the local council area of the City of Swan. These reviews focussed primarily on the following information:
Development application (DA) information, particularly relating to infrastructure/buildings that may be a potential source of contamination (e.g. storage tanks, fibro buildings etc);
Complaints history of sites;
Any zoning restrictions specifically applied to the site (e.g. flood prone, suspected contaminated land).
The results of this review are detailed in Table 4-3 below:
Table 4-3: Results of Council Record Reviews
Site Council Site Information
Lexia Liquid Waste Disposal Site, City of Swan Development Application (DA) Gnangara, located within reserve Information state forest 65, Lexia, WA, 6065 Lot F65 Gnangara Road, Lexia
DA 9392/1995 – Proposal entry statement
DA 590/2006 - Water booster pumping statement
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Site Council Site Information DA 591/2016 – Northlink WA Project Stage 2
Complaints history of the site Liquid waste site ceased operation in Sept 1982*
State Forest 65 (large site so complaints relate to State Forest 65 generally)
Various dates: Dead animals/off road vehicles/abandoned vehicles/street lighting/litter/fire burning/smoke
*Further historic information may/may not be available through an old data system if further information required
Other Information Bushfire Prone
Regional Reserve
Road Reserve: 650m section of City of Swan Development Application (DA) Gnangara Road, Lexia, west of the Information former waste water disposal entrance at the junction, (PIN 1154 DA 668/2005 – Temporary sign 3278) Complaints history of the site Dead animals – Feb 2019
Dead animals – March 2015
Signage – June 2013
Road safety – March 2013
Other Information Bushfire Prone
Regional Reserve
4.5. Heritage Records 4.5.1. Aboriginal Heritage
A search of the Aboriginal Heritage Inquiry System Database (DPLH 2020) undertaken on 28 January 2020 indicated that there are four registered Aboriginal Sites within the study area and four heritage sites marked as ‘other’. The details of the registered Aboriginal Sites are listed in Table 4-4 below and their location is shown on Figure 8.
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Table 4-4: Aboriginal Heritage Sites
Site ID Site Name Status
3692 Bennett Brook in Toto Registered
3840 Bennett Brook – Camp Area Registered
551 Lord Street North 1 Registered
552 Lord Street North 2 Registered
4.5.2. European Heritage
A search of the Heritage Council of Western Australia (2020) State Heritage Register undertaken on 28th January 2020, indicated that there are no registered European Heritage Sites within the study area. 4.6. Previous Environmental Assessments
Table 4-5 below identifies previous investigations conducted within the study area boundaries.
Table 4-5: key relevant reports to environmental quality
Title Author Year Summary of Assessment METRONET – Coffey 2020 An investigation to provide a baseline assessment of Morley- hydrological regimes (groundwater and surface water) and Ellenbrook Line develop a dataset to support future planning, environmental Baseline approvals and engineering design for the MEL alignment. Hydrology 2018- 2019 Annual Report Quarterly GME Coffey 2020 Quarterly GME to provide additional baseline data of Report – hydrological regimes (groundwater and surface water) and September to develop a dataset to support future planning, environmental November 2019 approvals and engineering design for the MEL alignment METRONET – Coffey 2020 A preliminary Acid Sulfate Soils (ASS) investigation to provide Morley- a broad understanding of the extent of ASS and net acidities Ellenbrook Line within the soil profile to inform the preliminary planning and Preliminary Acid management of ASS during construction works, as well as Sulfate Soil support the acquisition of environmental approvals for the Investigation: Malaga to Ellenbrook Section of the rail alignment. Part 2 – Malaga to Ellenbrook Section PSI Perth – Coffey 2015 A PSI into the potential sources of contamination that may be Darwin National encountered within the boundary of the PDNH. Included Highway reporting of site observations, potential receptors, conceptual (PDNH), site models, ASS risk mapping, Contaminated Sites Database Northlink search, DWER records search and previous investigations. MEL Options – Jacobs 2018 A feasible options assessment for the MEL route, based on an Environment and investigation of heritage and environment within the proposed Heritage MEL envelope. Assessment
Morley to Ellenbrook Route Protection Study
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Title Author Year Summary of Assessment Preliminary ASS Coffey 2015 A detailed PSI into the potential for ASS within the boundary if Investigation the PDNH including consideration of construction Perth-Darwin methodology, potential impacts, sensitive receptors and risk National management comprising: Highway, Northlink Risk of acid sulfate soil occurrence Risk of acid generation Dewatering risk
PSI Former Golder 2015 A PSI was undertaken at the former liquid waste disposal Liquid Waste Associates facility, located in Lexia WA. The Site is classified as ‘Possibly Disposal Facility, Contaminated – Investigation Required’. Lexia Lexia Liquid Golder 2015 Soil investigations were undertaken to assess the presence, Waste Disposal Associates composition and extent of soil contamination on site and to Facility – review the existing groundwater monitoring network to assess Detailed Site its suitability for future groundwater monitoring events. The Investigation investigation consisted of 10 soil testing boreholes and 18 test pits together with screening to assess total organic vapours. Soil contamination was related to waste from liquid waste disposal.
A variety of contaminants were encountered above guideline criteria or background concentrations in groundwater including Total Recoverable Hydrocarbons (TRH), Monocyclic Aromatic Hydrocarbons (MAH), metals, nutrients, phenols and Volatile Organic Compounds (VOCs). These were associated with material in grease traps, sludge beds, basins and oxidation lagoons. Areas of soil contamination were not fully delineated and no groundwater sampling was undertaken. Lexia Liquid Golder 2016 A groundwater monitoring event was undertaken to assess the Waste Disposal Associates direction of groundwater flow, whether previously identified Facility – contamination in groundwater was still present, the Groundwater contaminants present in groundwater and their vertical and Monitoring Event lateral extent and the risks posed by these contaminants to ecological and human health receptors. Groundwater flow direction was found to be to the southeast and groundwater contamination was found to be present both on and off-site.
Groundwater contamination was detected at concentrations above assessment criteria for nutrients and pathogens and organics including acetic acid, formic acid, vinyl chloride, 1,4- dichlorobenzene, TRH (C15-C36) and naphthalene. However, the groundwater plume was not vertically or horizontally delineated due to limitations with the groundwater monitoring well network although it is noted that groundwater contamination is present on site and being transported off-site. Further groundwater monitoring is recommended along with confirmation from Water Corporation and Whiteman Park regarding the position of operational production bores. MEL Hydrology RPS 2019 RPS undertook the monthly water level monitoring on 23 Fieldwork January 2019, 18-20 February 2019 and 26 March 2019 across the 42 groundwater bore and 7 staff gauge network. METRONET Water levels were measured in conjunction with Coffey on 17 Morley- April 2019 and have also been included in this report. Ellenbrook Line The quarterly water quality monitoring round was conducted on18-20 February 2019. Water samples were collected from 16 groundwater bores and one surface water site (the remaining six were dry).
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Title Author Year Summary of Assessment Hydrology RPS 2018 The scope of works was designed to collate information from fieldwork results: existing groundwater bores and newly installed monitoring November 2018 locations to provide a comprehensive network and baseline dataset. The groundwater and surface water level and quality METRONET monitoring were conducted in November 2018 to capture the Morley - annual peak. A bore condition survey and water level Ellenbrook line measurements took place from 14-15 November, bore and staff gauge installations took place on 19 November and groundwater and surface water sampling took place on 27-28 November. Wetland Coffey 2015 The assessment reviewed existing wetland field assessment Assessment and address any gaps within the previous studies for the PDNH project area. Perth – Darwin National Highway Design Golder 2015 The study was designed to establish a design groundwater groundwater Associates level along the alignment, which is used in the road design to Level for Central establish the vertical alignment of the road and identify areas Section of that may require sub-soil drainage. Northlink WA Road Alignment The design groundwater level represents the estimated maximum groundwater level over the life of the road and is based on assumptions of changes to key parameters (refer to Section 6) affecting the groundwater behaviour. Urban Water RPS 2015 The urban water management plan was conducted in order to: Management Plan Reduce potable water consumption within both public and private spaces through the use of practical and cost- effective measures. Incorporate where possible, low maintenance, cost effective landscaping and stormwater treatment systems. Maintain and if possible, improve water quality (surface and groundwater) within the development in relation to pre-development water quality. Promote infiltration of surface water to minimise the risk of water quality degradation in the Bennett Brook. Implement best management practices in regard to stormwater management. Effectively manage the risk to human life, property damage and environmental degradation from flooding and waterlogging.
Bennett Brook Whiteman 2012 The management plan outlines the management issues of South Park Bennett Brook: Management Plan Ecological issues including, ecological restoration, pest management, introduced flora species control, native fauna protection, water quality. Protection of lives, property, vegetation communities and fauna habitats from wildfire within the Reserve and neighbouring property. Restoration of disturbed areas within the Reserve. Research and monitoring to ensure conservation of biodiversity within the reserve.
The management plans key outcomes are outlined below:
Creating a well-managed urban bushland that conserved biodiversity.
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Title Author Year Summary of Assessment Significant reduction of weeds and an increase of native flora in revegetation sites. Fire hazard reduction through weed control and appropriate fire breaks. Creating an aesthetically pleasing environment.
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5. Contaminated Sites Information Review 5.1. Contaminated Sites Databases
A Basic Summary of Records (BSR) request was obtained from DWER for all classified sites within the study area with the exception of those classified as ‘Decontaminated’ and ‘Awaiting Classification’.
It should be noted that the database only indicates sites classified as ‘Contaminated-remediation required’, Contaminated – restricted use’ and ‘remediated for Restricted use’. Sites not shown on the database are those that:
Are classified as ‘Possibly Contaminated – Investigation Required’, ‘Decontaminated’, ‘Not contaminated – unrestricted use’ and ‘Report not substantiated’; Have been reported but not classified by DWER (‘Awaiting Classification’); and Have been classified by DWER but not yet registered in the online database.
Figure 4 identifies the classified sites within the study area and Table 5-1 details information regarding these classified sites.
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Table 5-1: Summary of Contaminated Sites within the study area
Site Classification Details Significance to Development Envelope Lexia Liquid Waste Possibly Groundwater beneath the source site is contaminated with High Disposal Site contaminated – ammonia and heavy metals. In 1994, the plume was 600 m wide (Landfill) investigation and 1000 m long of which 500 m was within Whiteman Park. The It is understood that significant excavation works are to be Gnangara, located required plume extended to the full extent of the superficial (shallow) undertaken in this area, associated with the construction of a within reserve aquifer below the site. road bridge and underpass at the Gnangara Road and State Forest 65, Drumpellier Drive intersection. Therefore, it is likely that Lexia WA 6065 The site to the north of Gnangara Road, (the Source Site) was groundwater will be encountered, and that dewatering works will (Source site) and formerly used as a sewage effluent treatment facility and waste be required. As a result, management measures need to be in Lot 811 on disposal site, a land use that has the potential to cause place to protect site workers, ecological features and deposited plan contamination. The site falls within the priority 1 source protection groundwater users from contamination during construction works. 405371 (233 area of the Gnangara Underground Water Pollution Control Area. Drumpellier Drive)
The source site was used for the treatment and disposal of domestic sewage effluent from November 1971 until 1982. The site was temporarily re-opened in 1987 and operated between August 1987 and November 1988. Although the Site was only authorised to accept domestic waste, various trade and industrial wastes are also suspected of having been deposited at the site.
The operational area of the Site comprised a number of unlined pits in which liquid waste underwent sedimentation/anaerobic digestion over a three to five month period, followed by oxidation and evaporation. Given the pits were unlined, liquid wastes are likely to have leaked, leading to contamination of underlying soil and groundwater which lies between 3 and 10 metres below the base of the pits. Contamination of soils is also likely to have occurred as a result of the burial of digested sludges on-site.
The groundwater investigations carried out in 1994 identified a contaminant plume extending from the Source Site in a south to south-easterly direction and affecting land south of Gnangara Road. Ammonia and heavy metals were present in groundwater at concentrations exceeding Australian Drinking Water Guidelines and Aquatic Systems – Freshwater.
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Site Classification Details Significance to Development Envelope Concentrations of contaminants have been found to exceed adopted assessment levels for potable water for human consumption and ecological investigation levels. A screening Risk Assessment has therefore indicated that further investigation is required to determine the risk to human health, the environment and environmental values.
In 1995, the then Department of Environmental Protection requested the continual assessment and monitoring of the plume and provision of reports on a regular basis. No further monitoring information has been received.
In 2015, Golder Associates undertook soil investigations within the site area as well as a review of the groundwater monitoring network, which was deemed to be suitable for use.
The soil investigations revealed elevated concentrations of hydrocarbons, nutrients, metals, phenols and solvents, which were confined to the site area and mainly associated with grease traps. A groundwater monitoring event undertaken by Golder in 2016 confirmed the existence of a groundwater plume, predominantly consisting of nutrient contamination, which was found to extend off-site toward the south and south-east.
Further investigations are to take place in 2020 to further delineate soil and groundwater contamination associated with the site and develop remediation options. 53 Cheltenham Report not The site was reported because fill sand was imported to the site Low Street, Bennett substantiated from an unknown source that was suspected of containing Springs, Lot 607 fragments of asbestos containing material (ACM) that has the As ACM materials were not found at levels deemed to pose a risk on Plan 3698 potential to pose a risk to human health. to human health, it is not considered that the site will pose any significant risk to the development. Following a site inspection by the Department of Environment Regulation (DER) in 2016, it was found that the fill material consisted of small pieces of building rubble including cement sheeting. Only 2 fragments of ACM were identified with the rest of the cement sheeting determined not to contain asbestos. Therefore, the Department of Health (DoH) concluded that ACM was not present at levels that posed an unacceptable risk to
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Site Classification Details Significance to Development Envelope human health in accordance with the “Guidelines for the Assessment, Remediation and Management of Asbestos Contaminated Sites in Western Australia, (DoH, 2009). DER concurred with the DoH conclusions.
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6. Site Inspections
Site inspections were conducted by Coffey in the study area on 21 January 2020. The inspections involved visiting all classified sites (with the exception of those that were classified as ‘Decontaminated’) within the study area to assess their current condition and potential for contamination together with a review of their surroundings. Observations were also made regarding any other notable land uses identified by the review of aerial photographs, (i.e. intensive agriculture was noted to be present opposite 53 Cheltenham Street, identified as Swan Valley Egg Farm). Table 6-1 below summarises the findings of the site inspections and a photolog of the site inspections is shown in Plates 1 and 2.
Table 6-1: Site Inspection Summary
Site Location Photo No. General observations Former Lexia Liquid Not taken Southern-most part of land is part of Whiteman Park and northern area Waste Facility, Lexia is classed as a State Forest. Both consist of open fields or woodland & Lot 811on Plan with no evidence of past contamination or site processes. 405371 (233 Drumpellier Road) 53 Cheltenham 1-2 Land is unoccupied, open pasture with no evidence of past site Street, Bennett processes or evidence of contamination. The surrounding area consists Springs – Lot 607 on of an egg farm with large scale container storage and processing Plan 3698 systems, parkland, (Whiteman Park), agricultural and residential land.
Plate 1: 53 Cheltenham Street, Bennett Springs – Lot 607 on Plan 3698 – facing west
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Plate 2: Facing East from 53 Cheltenham Street toward Swan Valley Egg Farm
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7. Preliminary Conceptual Site Model
A conceptual site model (CSM) describes the possible pathways by which exposure to potential contamination may occur. For exposure to occur, a complete pathway must exist between the source of contamination and the receptor (i.e. the person or ecosystem components potentially affected by the contamination). Where the exposure pathway is incomplete, exposure cannot occur, leaving no risk via that pathway.
For exposure to occur, a complete pathway must exist between the source of contamination and the receptor (i.e. the person or ecosystem components potentially affected by the contamination). Where the exposure pathway is incomplete, exposure cannot occur, leaving no risk via that pathway.
An exposure pathway will typically consist of the following elements:
A source contamination (e.g. a leak or spill); A release mechanism (e.g. migration in soil, leaching to water, emission to air); Retention in the transport medium (e.g. soil, groundwater, surface water or air); An exposure point (e.g. where a person comes into contact with contaminated dust or soil, or contaminated groundwater from a well, or building overlying volatile contamination); and An exposure route (e.g. inhalation, ingestion, absorption through skin). 7.1. Source Assessment 7.1.1. On-site
A primary source (S) of contamination is the first point at which a chemical has been introduced via a leak, spill or deliberate disposal released from the original source. Known primary sources which exist are listed below:
Sewage sludge; and Waste (landfilled) materials.
Other potential sources of contamination throughout the study area include:
Disturbance of ASS materials; Intensive agriculture including feedlots and saleyards, (i.e. Egg Farm on Cheltenham Road, Bennett Springs); Uncontrolled fill; and Fly tipping.
7.1.2. Off-site
The majority of the study area consists of residential land use or state parkland (Whiteman Park) with a larger commercial area to the north within Ellenbrook. Registered contaminated sites are within areas of open, disused agricultural land or state forest land. 7.2. Pathway and Receptor Assessment
7.2.1. Potential Migration Pathways
Potential migration pathways comprise the following:
Migration of airborne particles; Vertical migration of contaminants from soil into underlying groundwater; Lateral migration of impacted groundwater to the southeast; Coffey Services Australia Pty Ltd 26 ABN 55 139 460 521
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Runoff of impacted surface water into on-site drainage system; Abstraction of impacted groundwater.
Potential exposure routes include the following:
Dermal contact with impacted soil, surface water and groundwater (where abstracted); Incidental ingestion of impacted soil, surface water and groundwater (where abstracted); Ingestion of contaminated groundwater (where abstracted); Inhalation of impacted soils or dust.
7.2.2. Potential Receptors
The following are considered potential receptors:
Current and future site visitors; Current and future construction and intrusive maintenance workers; Current and future off-site residents and property occupants in the vicinity of the site; On- and off-site residents and property occupants in the vicinity of the site; On-and off-site groundwater users; On-site terrestrial ecology; The ecology of the downgradient Swan River; Built structures with concrete foundations.
Where appropriate, the above listed receptors have been applied. However, where it is considered the chosen receptors are not plausible within the source-pathway-receptor linkage assessment, they have been discounted. 7.3. Qualitative Risk Assessment
7.3.1. Source-Pathway-Receptor Linkage Assessment
The refined CSM is presented in Table 7-1, which describes the source-pathway-receptor (SPR) linkages at the site taking into account the reported concentrations and distribution of COPCs
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Table 7-1: Source-Pathway-Receptor Linkages for Contamination associated with the study area
Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage?
Former Sewage Buried Sewage Horizontal Dermal contact Total Recoverable Current and future Incomplete The former Lexia Liquid Waste Treatment & sludges and groundwater flow (direct contact with Hydrocarbons on-site users Facility is located outside the Waste Facilities & landfilled waste in the aquifer soil and (TRH) study area and reference to associated site to materials (trade groundwater) previous site investigations, South and industrial Vertical Monocyclic (Golders, 2015) show that the waste) movement of Inhalation (vapour Aromatic areas of former waste groundwater intrusion/airborne Hydrocarbons deposition are not within the through the particles) (MAH) i.e. study area, therefore current vadose zone via benzene, toluene, and future site users are seasonally Ingestion ethylbenzene and unlikely to be impacted by induced (incidental xylenes contamination. groundwater consumption of fluctuation soil and Phenols Current and future Complete Although the sources of groundwater) construction contamination are not within Migration of Metals workers and the development envelope, vapours Inhalation of intrusive previous investigations, vapours Nutrients maintenance (Golders, 2016) have shown workers that there is likely to be Ammonia contaminated groundwater downgradient of the site within Pathogens the area of construction for the Gnangara Road and Volatile Organic Drumpellier Drive underpass Compounds and bridge and that this has (VOCs) not been vertically or laterally delineated. Consequently, Methane management measures are likely to be required to protect Carbon Monoxide construction workers.
Hydrogen Sulfide Ground gas from buried waste may also pose a risk through lateral migration through soils and groundwater.
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage?
Nearby surface Incomplete Lake Fresca is located water bodies, approximately 300 m to the interconnected northwest of the former Lexia systems and Liquid Waste Facility however dependent this is in the opposite direction ecological systems to groundwater flow and any temporary pumping for water use along the alignment is unlikely to result in migration of contamination into this feature. Therefore, this feature is unlikely to be impacted. The groundwater Groundwater and Complete investigations carried out in any users of 1994 identified a contaminant groundwater off- plume extending from the site such as, Source Site in a south to domestic non- south-easterly direction and potable and affecting land south of agricultural uses. Gnangara Road. Ammonia and heavy metals were present in groundwater at concentrations exceeding Australian Drinking Water Guidelines and Aquatic Systems – Freshwater.
Further groundwater investigations by Golders, (2016) has shown that a groundwater contaminant plume, (predominantly consisting of nutrient contamination) is still present and extending off-site to the south and southeast although the vertical and lateral extent have not been fully defined. Further investigations are to be
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage? undertaken in 2020 to further delineate soil and groundwater contamination associated with this site.
Terrestrial ecology Complete A confirmed Banksia TEC Woodland is present to the south of Gnangara Road, which may potentially be impacted dependent on the lateral extent of groundwater contamination in the area, particularly if abstraction required, which may draw contamination closer to the GDE if management measures are not adopted.
Current and future Incomplete The site is zoned as a regional on and off-site reserve and therefore no residents and development is likely to take property occupants place in this area. in the vicinity of the site.
Intensive Farm wastes and Contaminated Dermal contact, Carbamates Current and future Incomplete There are no classified sites agriculture silage runoff entering (direct contact with on-site users within the development including feedlots stormwater sumps soil and Organochlorine envelope, and it is unlikely that and saleyards, and drainage groundwater) pesticides (e.g. current and future on-site (i.e. Swan Valley systems Endrin, users will come into direct Egg Farm) Ingestion Methoxychlor, contact and be impacted by Horizontal (incidental Pentachlorophenol) any contamination. groundwater flow consumption of in the aquifer soil and Organophosphate Current and future Complete The development envelope groundwater) pesticides construction passes through an area of Vertical workers and agriculture in the south-eastern movement of Herbicides (e.g. intrusive section of the alignment and groundwater Triazine, Atrazine, maintenance there is potential to intercept through the 2,4,5-T 2,4-D, workers soil and groundwater vadose zone via MCPA, Picloram) contamination where this may
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage? seasonally exist if excavation works occur induced Insecticides DDT, in this area. fluctuation in DDE and DDD, water levels Bifenthrin Nearby surface Complete Although there are no known water bodies, sources of contamination Aldrin and Dieldrin interconnected within the development systems and envelope, there is potential for Nitrates dependent this to impact surface water ecological systems bodies if contamination is Salinity present within groundwater.
Metals Groundwater and Complete Although there are no known any users of sources of contamination Nutrients groundwater off- within the development site such as, envelope, there is potential for Toxaphene domestic non- this to impact groundwater potable and users if contamination is Ammonia agricultural uses. present within groundwater.
Terrestrial ecology Incomplete There are no known areas of designated terrestrial ecology within the agricultural area of the development envelope and so it is unlikely that these features will be impacted.
Current and future Incomplete There are no classified sites on and off-site within the development residents and envelope, and it is unlikely that property occupants current or future site occupants in the vicinity of the will come into contact with site. potential contamination.
Entire study area Disturbance of Contaminated Dermal contact, Sulfuric acid Current and future Complete Throughout most of the study potential ASS runoff entering (direct contact with on-site users area, there is a moderate to stormwater sumps soil and Heavy metals low risk of encountering ASS and drainage groundwater) occurring within 3 m of natural systems soil surface, with some isolated areas showing a high
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage? to moderate risk. Excavation Horizontal Ingestion works within the study area groundwater flow (incidental may disturb ASS and cause in the aquifer consumption of acidification of soil and soil and groundwater potentially Vertical groundwater) exposing current and future movement of on-site users with acidic groundwater groundwater and heavy through the metals. Ingestion and dermal vadose zone via contact with impacted soils seasonally and groundwater may cause induced dermatitis and poor health. fluctuation in water levels Current and future Complete Throughout the study area, construction there is a high to moderate risk workers and of encountering ASS occurring intrusive within 3 m of natural soil maintenance surface. Excavation works workers within the study area may disturb ASS and cause acidification of soil and groundwater potentially exposing current and future on-site users with acidic groundwater and heavy metals. Ingestion and dermal contact with impacted soils and groundwater may cause dermatitis and poor health.
Nearby surface Complete Any surface water bodies water bodies, located near the study area interconnected may become impacted by ASS systems and if not controlled. Many dependent elements that are stable at ecological systems neutral pH become mobile under acidic conditions and can be toxic to plants and/or animals, including humans. Furthermore, aluminium
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage? hydroxide compounds released in water due to the disturbance of ASS are toxic to fish, affecting their gills and their ability to absorb oxygen.
Groundwater and Complete Throughout the study area, any users of there is a high to moderate risk groundwater off- of encountering ASS occurring site such as, within 3 m of natural soil domestic non- surface. Excavation works potable and within the study area may agricultural uses. disturb ASS and cause acidification of soil and groundwater potentially exposing current and future on-site users with acidic groundwater and heavy metals. Ingestion and dermal contact with impacted soils and groundwater may cause dermatitis and poor health.
Terrestrial ecology Incomplete There is unlikely to be any significant flora and fauna in the area that could be affected.
Construction projects such as MEL may expose ASS during excavation and dewatering. If ASS is encountered and not managed, foundations or earthworks built on impacted soils may settle or subside unevenly and may cause roadways to slump and foundations to crack.
Current and future Incomplete It is unlikely that current or on and off-site future on-site occupants will
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage? residents and come into contact with ASS property occupants and are therefore unlikely to be in the vicinity of the impacted. site.
Built structures, Complete Construction projects such as subsurface, MEL may expose ASS during underpasses excavation and dewatering. If tunnels ASS is encountered and not managed, foundations or earthworks built on impacted soils may settle or subside unevenly and may cause roadways to slump and foundations to crack.
Entire study area Fly tipping Excavation works Dermal contact, Metals Current and future Incomplete There are no specific sites (direct contact with on-site users within the study area which Migration of soil and Asbestos have identified uncontrolled fly airborne particles groundwater) tipping. Petroleum Ingestion hydrocarbons Current and future Complete There are no specific sites (incidental construction within the study area which consumption of Monocyclic workers and have identified uncontrolled fly soil and Aromatic intrusive tipping. However, there is groundwater) Hydrocarbons maintenance always a risk that this may (MAH) e.g. workers occur during construction, Inhalation of benzene, toluene, affecting site workers. airborne particles ethylbenzene and xylenes Nearby surface Incomplete There are a number of water bodies, wetlands along the study area Polyaromatic interconnected however, the majority of these hydrocarbons systems and are within Whiteman Park, (PAHs) dependent which is a managed area. ecological systems Organochlorine and Groundwater and Incomplete There are no specific sites Organophosphate any users of within the study area which Pesticides groundwater off- have identified uncontrolled fly site such as, tipping. It is unlikely that
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage? domestic non- groundwater resources will be Volatile Organic potable and affected by fly tipping activities Carbons (VOCs) agricultural uses. unless these contained significant quantities of chemicals, fuels or other contaminating substances and the likelihood of this is considered to be low.
Terrestrial ecology Incomplete There is unlikely to be any significant flora and fauna in the area that could be affected.
Current and future Incomplete There are no specific sites on and off-site within the study area which residents and have identified uncontrolled fly property occupants tipping. These activities are in the vicinity of the unlikely to occur and would be site. very localised in nature. Therefore, it is unlikely that they will have any impact on current and future on and off- site residents.
Entire study area Uncontrolled fill Contaminated Dermal contact, Metals Current and future Incomplete There are no specific sites runoff entering (direct contact with on-site users within the study area which stormwater sumps soil and Asbestos have identified uncontrolled fill. and drainage groundwater) systems Petroleum The likelihood of current and Ingestion hydrocarbons future study area users being Excavation works (incidental impacted is unlikely as it is not consumption of Monocyclic expected that the general soil and Aromatic public will have access to the groundwater) Hydrocarbons site during excavation works. (MAHs) e.g. Future users of the study area benzene, toluene, should not be exposed as the ethylbenzene, road reserve should be sealed xylenes. with asphalt.
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage?
Polyaromatic Current and future Complete There are no specific sites hydrocarbons construction within the study area which (PAHs) workers and have identified uncontrolled fill. intrusive However, although the majority Organochlorine maintenance of the study area is within and workers areas of new road reserve, Organophosphate bushland or agricultural areas Pesticides there may still be potential for uncontrolled fill. . Further to the North in Ellenbrook there are large areas of fill associated with commercial development but the quality of these should have been controlled during development.
Nearby surface Incomplete There are no specific sites water bodies, within the study area which interconnected have identified uncontrolled fill. systems and Surface water systems that are dependent in the vicinity of the study area ecological systems are located in Whiteman Park, where it is unlikely that uncontrolled fill material would be present.
Groundwater and Incomplete There are no specific sites any users of within the study area which groundwater off- have identified uncontrolled fill. site such as, Therefore, the risk to domestic non- groundwater resources is potable and considered low. agricultural uses.
Terrestrial ecology Incomplete There is unlikely to be any significant flora and fauna in the area that could be affected.
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage?
Current and future Incomplete There are no specific sites on and off-site within the study area which residents and have identified uncontrolled fill. property occupants The majority of the study area in the vicinity of the is within areas that are either site. parkland or agricultural and the risk of encountering uncontrolled fill material is low. Therefore, there is a low risk to current and future on and off- site users.
Road Uncontrolled fill Contaminated Dermal contact Metals Current and future Incomplete The area of concern is road Infrastructure runoff entering (direct contact with on-site users reserve. Majority of the road Stormwater soil and Asbestos reserve is sealed with asphalt sumps and groundwater) and there is limited risk of drainage systems Petroleum exposed uncontrolled fill. Ingestion hydrocarbons Excavation works (incidental Current and future Complete There are no specific sites consumption of Monocyclic construction within the study area which soil and Aromatic workers and have identified uncontrolled fill. groundwater) Hydrocarbons intrusive However, there is still a (MAHs) e.g. maintenance possibility that this may be benzene, toluene, workers encountered during excavation ethylbenzene and works, which may affect site xylenes construction workers.
Polycyclic aromatic hydrocarbons (PAHs)
Fly tipping Excavation works Dermal contact Metals Current and future Incomplete The area of concern is road (direct contact with on-site users reserve. Majority of the road Migration of soil and Asbestos reserve is sealed with asphalt airborne particles groundwater) and there is limited risk of Petroleum exposed fly tipping. Ingestion hydrocarbons (incidental Current and future Complete There are no specific sites consumption of construction within the study area which
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Land Use Source of Migration Potential Contaminants of Receptor SPR Comments impacts Pathway exposure route Potential Concern linkage? soil and workers and have identified fly tipping. groundwater) Monocyclic intrusive However, this has the potential Aromatic maintenance to occur during construction, Inhalation of Hydrocarbons workers which may affect site workers. airborne particles (MAHs) e.g. benzene, toluene, Terrestrial ecology Incomplete There is unlikely to be any ethylbenzene and significant flora and fauna in xylenes the area that could be affected.
Polycyclic aromatic hydrocarbons (PAHs)
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7.4. Summary of CSM Linkages
Table 7-2 below summarises the main complete linkages of concern identified in the CSM.
Table 7-2: Summary of CSM linkages
Land Use Sources Pathways Exposure Route Receptors Former Sewage Buried Sewage Horizontal Dermal contact Current and future site Treatment & sludges and groundwater flow (direct contact with workers Waste Facilities landfilled waste in the aquifer soil and groundwater) materials (trade Groundwater users and industrial Vertical Ingestion (incidental including both drinking waste) movement of consumption of soil water, non-potable and groundwater and groundwater) agricultural through the vadose zone via Inhalation of vapours Ecological receptors seasonally induced groundwater Horizontal and fluctuation Lateral Groundwater Migration Migration of vapours Intensive Farm wastes Contaminated Dermal contact Present and future agriculture and silage runoff entering (direct contact with construction and including stormwater soil and groundwater) maintenance workers feedlots and sumps and saleyards, (i.e. drainage systems Ingestion (incidental Surface water bodies Swan Valley Egg contact with soil and including geomorphic Farm) Horizontal groundwater) wetland features groundwater flow in the aquifer Horizontal and Groundwater users Lateral Groundwater including both drinking Vertical Migration water, non-potable and movement of agricultural groundwater through the vadose zone via seasonally induced fluctuation in water levels
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Land Use Sources Pathways Exposure Route Receptors Entire Study Disturbance of Contaminated Dermal contact Present and future site Area ASS runoff entering (direct contact with users stormwater soil and groundwater) sumps and Present and future drainage systems Ingestion (incidental construction and contact with soil and maintenance workers Horizontal groundwater) groundwater flow Groundwater users in the aquifer Horizontal and including both drinking Lateral Groundwater water, non-potable and Vertical Migration agricultural movement of groundwater Surface water bodies through the including geomorphic vadose zone via wetland features seasonally induced fluctuation in Built structures and water levels underpasses (i.e. Bennett Brook Bridge)
Uncontrolled Fill Contaminated Dermal contact Present and future runoff entering (direct contact with construction and Stormwater soil and groundwater) maintenance workers sumps and drainage systems Ingestion (incidental contact with soil and Excavation works groundwater) Fly-tipping Excavation works Dermal contact Present and future (direct contact with construction and Migration of soil and groundwater) maintenance workers airborne particles Ingestion (incidental contact with soil and groundwater)
Inhalation of airborne particles Road Uncontrolled fill Contaminated Dermal contact Present and future Infrastructure runoff entering (direct contact with construction and Stormwater soil and groundwater) maintenance workers sumps and drainage systems Ingestion (incidental contact with soil and Excavation works groundwater) Fly Tipping Excavation works Dermal contact Present and future (direct contact with construction and Migration of soil and groundwater) maintenance workers airborne particles Ingestion (incidental contact with soil and groundwater)
Inhalation of airborne particles
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7.4.1. Data Gaps based on complete SPR linkages
Table 7-3 below presents the results of the data gap analysis undertaken as part of the development of the CSM and outlines the further works that are required to address these.
Table 7-3: Identified data gaps
Site Data Gap Identified Recommendations Lexia Liquid Waste Disposal Site The full extent of waste material It is understood that further works (Landfill) Gnangara, located within has not been delineated and the are to be undertaken by GHD on reserve State Forest 65, Lexia WA soil contamination has not been behalf of DPLH. These should 6065 and Lot 811 on deposited clearly defined. Groundwater further assess the presence of plan 405371 (233 Drumpellier contamination has not been waste materials and the extent of Drive) laterally and vertically delineated in soil contamination and improve the any direction. definition and delineation of the groundwater plume. The requirements for further works to assess risk to the MEL project should be determined based on the outcomes of the GHD investigations.
A Groundwater Management Plan (GMP) should be compiled to manage the risks associated with groundwater abstraction in this area. Intensive agriculture including There are no classified sites within If excavation works take place in feedlots and saleyards, (i.e. Swan the Development Envelope and no the vicinity or down hydraulic Valley Egg Farm) known contamination. However, gradient of any identified intensive there is potential for contamination agricultural source then it is to be encountered in soil and recommended that soil and groundwater if excavation works groundwater testing should be take place in areas of intensive undertaken for Potential agricultural use, (i.e. Swan Valley Contaminants of Concern, (PCoCs) Egg Farm is within the associated with this land use to Development Envelope). assess risks to the project. Entire study area More targeted investigations may Target investigations have be required based on results of occurred across the alignment (Acid Sulfate Soils – ASS) recent ASS investigations, which however, an ASS Management can then be used to fully assess Plan should be developed together the risk posed by ASS to help with further targeted investigations inform an adequate ASS in areas of high risk, if required. Management Plan. Engineering consideration should also be given to the risk to built structures, i.e. potential deterioration of pilings and foundations. Entire study area Assessment of areas of potential Formulation of a Construction fly-tipping required. Environmental Management Plan, (Fly Tipping) (CEMP) or similar with management measures for dealing with fly tipping when this occurs. Entire study area Both the extent and likelihood of Compilation of CEMP, or similar to encountering uncontrolled fill deal with unidentified contaminated (Uncontrolled fill) material is currently unknown. soils where these are encountered. Entire study area Extent and likelihood of Compilation of CEMP for uncontrolled fill and fly tipping management of risks associated (Road Infrastructure) associated with road infrastructure with site run-off, unidentified is currently unknown. Control contaminated soils and fly tipping
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Site Data Gap Identified Recommendations measures for dealing with surface and compilation of a Groundwater run-off also required. Management Plan (GMP) for areas affected by groundwater contamination and where deep excavation and dewatering works are required.
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8. Discussion
Based on the findings of the desktop assessment and site inspections, a CSM was developed which identified the following key areas for consideration:
Land Use
There are no current land uses that are of substantial concern across the study area however, the past land use associated with the Lexia Liquid Waste Disposal Site is the most significant risk within the study area due to its legacy of soil and groundwater contamination. Secondary to this are areas of intensive agricultural use in the south-eastern area of the alignment and road infrastructure with risks associated with drainage, fly tipping and uncontrolled fill material.
The majority of land use throughout and surrounding the study area is mainly State Reserve or residential with some agricultural use in the southeast of the alignment and commercial activity around the area of Ellenbrook Station.
Soil
Soil investigations undertaken by Golder Associates in 2015 within the former Lexia Liquid Waste Facility have revealed the presence of contamination, most of which was contained in grease traps, sludge drying beds, basins and oxygenation lagoons. The contamination consists of a mixture of hydrocarbons, metals, nutrients, phenols and solvents. Although the full extent of soil contamination has not been delineated, it is noted to be contained within the site area in and around areas of previous infrastructure and does not extend into the study area.
A very small part of the associated site to the south of Gnangara Road extends to within the study area however, it is unlikely that excavation work in the area would encounter any significant contamination within the very edge of this area unless works were extended to within the Whiteman Park area.
However, the main concern for construction throughout the study area in relation to soils is from ASS generation and uncontrolled fill associated with road infrastructure. These, along with potential fly tipping need to be controlled via the use of a Construction Environment Management Plan, (CEMP) and an Acid Sulfate Soil Management Plan, (ASSMP).
Groundwater
Previous investigations within the area of the former Lexia Liquid Waste Facility showed ammonia and heavy metals contamination in groundwater beneath the site, which had concentrations exceeding both Australian Drinking Water Guidelines (ADWG). Further investigations undertaken by Golder in 2016 revealed groundwater below and downgradient of the site with contaminant concentrations exceeding assessment criteria including ADWG, Australian Water Quality Guidelines for Fresh and Marine Waters – Fresh Water Guidelines based on 95% species level protection and Department of Health Domestic Non-Potable Groundwater Use Guidelines, (DNPUG). The contaminants included nutrients, (ammonia, nitrate, total oxidised nitrogen, total nitrogen and total phosphorous), E. Coli bacteria, metals, (chromium, cadmium, copper, nickel and zinc), TRH (C16-C34 F3), VOCs (1,4- dichlorobenzene and vinyl chloride), PAHs (naphthalene) and organic acids (formic acid and acetic acid). In addition, Biological Oxygen Demand, (BOD) of some groundwater samples was above assessment criteria.
This may present concerns for abstraction or excavation works taking place in the area due to potential exposure from contamination by direct dermal contact and ingestion or use or discharge of contaminated waters following abstraction. Further investigations are required in this area to delineate this contamination and assess the risk it poses to the project.
Further investigations undertaken by Golder Associates in 2016 have confirmed that a groundwater plume, consisting mainly of contamination in the form of nutrients, extends to the south and southeast beyond the site boundary of the former Gnangara Waste Facility, although the full lateral and vertical extent of this groundwater contamination has yet to be confirmed. It is understood that major earthworks are to be undertaken in this area associated with a new road bridge and underpass at the Coffey Services Australia Pty Ltd 43 ABN 55 139 460 521
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Gnangara Road and Drumpellier Drive intersection. Therefore, it is likely that dewatering will occur and therefore it is essential that groundwater is managed to prevent risks to site workers, ecological receptors and surrounding groundwater users, (if any).
However, the most significant constraint for groundwater throughout the study area is from disturbance of ASS owing to the significant amount of potable water supplies (PDWSA) and wetland ecosystems that are present. This is particularly the case given that it has been found that the Bassendean Sands aquifer has little or no buffering capacity to counter the generation of acidic conditions in groundwater. As a result, this would mean increased dissolution of metals and nutrients into groundwater, which would deteriorate groundwater quality and have the potential to damage wetland ecosystems.
It is therefore essential that both an Acid Sulfate Soil Management Plan (ASSMP) and a Groundwater Management Plan (GMP) are compiled to manage these issues.
There may be limited potential for encountering soil and groundwater contamination in areas of agriculture or known potential agricultural sources, (i.e. Swan Valley Egg Farm) where these occur. Therefore, consideration should be given for testing of groundwater in these areas if excavation work is required.
Surface Waters
There are a significant number of geomorphic wetland features throughout the study area, particularly within Whiteman Park. In addition, the Bennett Brook crosses the south-eastern section of the study area. This surface water course is a permanently flowing feature with a sensitive ecosystem, which may become impacted by ASS, if this risk is not managed. This may result in elements that are normally stable under neutrally acidic conditions becoming mobile under acidic conditions, which can be toxic to ecological receptors. Furthermore, aluminium hydroxide compounds released in water due to the disturbance of ASS are toxic to fish, affecting their gills and their ability to absorb oxygen. The risks associated with ASS generation can be controlled by use of an ASSMP. Other potential concerns include surface water run-off from site drainage, which can be controlled by management measures within a CEMP.
Acid Sulfate Soils
Information from publicly available databases suggests that there is moderate to low ASS potential throughout most of the study area. However, recent investigations undertaken by Coffey, (Coffey, 2020) showed Potential for Acid Sulfate Soils (PASS) in the form of Coffee Rock, present at the following locations:
Malaga Station (13,425m) to Bennett Springs Station (17,500m) within coffee rock that may be encountered between 1.0 mbgl and 2.8 mbgl, dependant on topography. The maximum net acidity was recorded as 0.393%S.
North of Whiteman Park Station (17,800m) to south of Ellenbrook Station (24,500m) within coffee rock that may be encountered between 1.25 mbgl to 2.1 mbgl dependant on topography. The maximum net acidity was 0.073%S.
The hydrogeological system was already shown to have undergone significant historical acidification. Groundwater beneath the areas of Whiteman Park South and Drumpellier Drive possessed low to moderate acid neutralising/buffering capacity. Concentrations of Titratable Alkalinity (TAlk) were generally greater in the vicinity of Ellenbrook indicating some level of inherent buffering capacity.
Based on engineering drawings, the majority of construction works will occur at or above grade and significant ground disturbance works are not anticipated to be required. Given that the majority of PASS is situated at depth, the potential to disturb and expose ASS is low. However, where high risk areas and excavation areas coincide, this will present a risk in terms of acidification of groundwater caused by dewatering. This is likely to cause more metals and nutrients to come into solution and will require that contaminated soils and waters are managed and disposed in a way that will not affect surrounding groundwater users or the environment.
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Furthermore, there is potential for exposure to present and future site works from dermal contact or ingestion of contaminated soil and groundwater and also to built structures through corrosion, (i.e. pilings and foundations). These management measures should be included within both a Groundwater Management Plan (GMP) and an Acid Sulfate Soil Management Plan, (ASSMP).
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9. Conclusions
The main objective of this study was to identify the presence of possible contaminating activities as a result of both historical and current land use which may have implications for the construction of the MEL project.
A broad desktop study was undertaken along with a targeted desktop study undertaken for higher risk sites, where appropriate. This revealed that the three main land uses of concern were past industrial use associated with a liquid waste treatment facility and landfill, agriculture and road infrastructure. However, the most significant potential concern for the study area was the potential generation of ASS owing to the significant amount of Public Drinking Water Supply Areas (PDWSAs) and wetlands in the study area.
The only potential site of concern throughout the study area is located on the intersection of Drumpellier Drive and Gnangara Road and consists of both a source site, (Former Lexia Liquid Waste Facility) an area of road reserve to the south of Gnangara Road and an associated site to the south of this, within Whiteman Park. The main contaminants of concern for these sites being Total Recoverable Hydrocarbons (TRH), Monocyclic Aromatic Hydrocarbons (MAH), metals, nutrients, phenols and Volatile Organic Compounds (VOCs). Site investigations have confirmed the existence of a groundwater plume extending to the south and southeast in this area, which is likely to be intersected during potential dewatering works for the new road bridge and underpass at the Gnangara Road and Drumpellier Drive intersection.
Reference to aerial photography showed that the majority of development throughout the area occurred from around 2003 onwards and is mostly associated with residential development with minor commercial and agricultural land use. Site inspections undertaken on the 21st January 2020 confirmed that both identified classified sites had been cleared with the former Gnangara Waste Facility and its associated site now being either state forest or open bushland within Whiteman Park.
The sensitivity of geomorphic wetland features in the area is considered high due to their number, characteristics and with many of them being located within Whiteman Park. If geomorphic wetland sediments are encountered within the study area, these may have the potential to cause subsidence effects if not managed correctly. Information from publicly available databases suggests that there is moderate to low ASS potential throughout most of the study area. Recent investigations undertaken by Coffey, (Coffey, 2020) showed Potential for Acid Sulfate Soils (PASS) in the form of Coffee Rock present in the areas around Malaga Station and Whiteman Park Station.
The hydrogeological system was already shown to have undergone significant historical acidification. Groundwater beneath the areas of Whiteman Park South and Drumpellier Drive possessed low to moderate acid neutralising/buffering capacity. Concentrations of Titratable Alkalinity (TAlk) were generally greater in the vicinity of Ellenbrook indicating some level of inherent buffering capacity. The risk to engineering features is considered low as most of these will be constructed above grade however, where excavations and ASS coincide, this will present a risk of acidification of groundwater from dewatering. This is of particular concern given the abundance of PDWSAs within the study area and potential corrosion of built structures, (i.e. pilings and foundations) if not managed effectively.
The data gained from the desktop studies and site inspections was used to develop a CSM to identify the complete contaminant pathways of concern and any data gaps that are required to be addressed. The CSM revealed that the main receptors for known identified sources of contamination were present and future site workers and off-site groundwater users with main exposure routes identified to be through dermal contact (direct contact with soil and groundwater) during excavations or abstraction/dewatering activities or through ingestion, (incidental consumption of soil and groundwater).
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10. Recommendations
Based on the conclusions of this study, Coffey make the following recommendations:
The results of further investigations to be undertaken by GHD at the Lexia Liquid Waste Facility should be reviewed and the outcomes of groundwater plume delineation considered in the context of future works within the MEL Development Envelope at the intersection of Drumpellier Drive and Gnangara Road.
Compilation of relevant management plans to deal with risks posed by contamination across the entirety of the study area, particularly in relation to consideration of ASS occurrence (CEMP, GMPs and ASS management plans);
Where excavation and dewatering may occur in areas of intensive agriculture with known potential sources, (i.e. Swan Valley Egg Farm) then testing of soil and groundwater for Potential Contaminants of Concern (CPoCs) should be undertaken to assess and manage risks to the project.
Engineering consideration should be given to the effects of ASS on built structures, (i.e. potential deterioration of pilings and foundations).
Engineering consideration should be given to the effects of the presence of geomorphic wetland sediments within the study area, i.e. potential subsidence issues.
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11. References
1. Department of Water & Environmental Regulation (DWER) online reporting database
2. Department of Water & Environmental Regulation (DWER) Perth Groundwater Atlas
3. Department of Water & Environmental Regulation (DWER) Contaminated Sites Database
4. Geological Survey of Western Australia (GSWA) online mapping tool
5. Australian Governments National Map
6. Department of Planning, Lands & Heritage (DPLH) Aboriginal Inquiry System Database
7. Heritage Council of Western Australia State Heritage Register
8. Eco Logical Australia (ELA) report entitled, ‘Morley-Ellenbrook Line Environmental Constraints Desktop Analysis’, dated May 2019
9. BSR_DMO 31_ Report_SB.PDF
10. BSR_DMO 9786_ Report_SB.PDF
11. BSR_DMO 9916_ Report_SB.PDF
12. PSI Perth-Darwin National Highway (PDNH) Northlink, (Coffey 2015)
13. MEL Options – Environment and Heritage Assessment – Morley-Ellenbrook Route Protection Study (Jacobs, 2018)
14. Preliminary ASS Investigation Perth-Darwin National Highway Northlink (Coffey, 2015)
15. PSI Former Liquid Waste Disposal Facility, Lexia (Golder Associates, 2015)
16. MEL Hydrology Fieldwork, METRONET Morley-Ellenbrook Line (RPS, 2019)
17. Hydrology fieldwork results, November 2018 - METRONET Morley-Ellenbrook Line (RPS, 2018)
18. Wetland Assessment – Perth-Darwin National Highway (Coffey, 2015)
19. Design Groundwater Level for Central Section of Northlink WA Road Alignment (Golder Associates, 2015)
20. Urban Water Management Plan, (RPS, 2015)
21. Bennett Brook South Management Plan (Whiteman Park, 2012)
22. Lexia Liquid Waste Disposal Facility – Detailed Site Investigation, (Golder Associates, November 2015). Report Ref: 1533728-001-R-Rev0
23. Lexia Liquid Waste Disposal Facility – Groundwater Monitoring Event, (Golder Associates, June 2016). Report Ref: 1649439-003-R-Rev0
24. Swan Canning Catchment Nutrient Report Update 2014, Bennett Brook, Department of Parks and Wildlife
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Figures
396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000 Karba r Pass D u gi t e R o ad
6,484,000 Euro Road Euro
Barlow Lan e Barlow Man glesDrive Trainor Road Millhouse Road X"
MainStreet
W istful Parade
D r u mp el l i er D r i ve 6,483,000 6,483,000 Cen tre y a W
Eastma n Road n Eastma TonkinHighwa y Pessoa Road Pessoa
Pin ea Turn akl vnue Aven Gaskell Leiria Road Leiria
6,482,000 DulegaWa l y 6,482,000 Gna n ga ra Road Gna n ga ra Road Road N ursery
An drea Drive Robert Street Robert 6,481,000 6,481,000 X"
hitemW n a Ya hep c n Highwa y 6,480,000 6,480,000 Park Street
Dren g Wa y Papago Loop Papago 6,479,000 Baa l Street 6,479,000
Bennett Brook
Murray Road Murray
W oollcott Aven ue
WAven oolcott ue W oolcott Aven ue 6,478,000 6,478,000
V I l l age C i r cl e Youle-Dea n Road
H ep bu r n A v enu e
Hen n essy Road nHen essy X" 6,477,000 6,477,000
Harrow Street Dulwic h Street
6,476,000 6,476,000 Lord Street Lord oknHgw y Highwa Tonkin X" X"
BellefinDrive Cran leigh Street Cra n leigh Street
Marsha ll Road
Mitra Loop
6,475,000 Luminous Boulevard Coast Road 6,475,000
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no. description drawn approved date LEGEND A ORIGINALISSUE JO NT 05.05.20 X" Proposedrailwa ystation Proposedrailwa yalign m en t
revision Minorwa tercourse StudyArea –Ma lagaEllen to b rookRail Works
client: drawn JO ECOLOGICAL AUSTRALIA PTY LTD
project: approved NT MORLEYTOELLEN BROOK PRELIMINARYSITEINVESTIGATION date 05.05.2020 PART2 0 0.3 0.6 0.9 1.2 title: scale ASSHOW N LOCATIONMAP SCALE 1:30,000 (A3) km original project no: figure no: rev: ProjecGDA tion: MGA1994 Zone 50 A3
MX D Tem plate Referen c e: 233882_PSI2_GIS001_v0_5 c e: Referen plate Tem MX D size 754-PEREN 233882 FIGURE1 A !( !( 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000 The Prom ena de
D u gi t e R o ad !]z|
BH007 6,484,000
Euro Road Euro Barlow Lane Barlow Trainor Road M illhouse Road X"!]z| BH022 !]z| !( BH021 !( !( !( !( !( !( Main S t r eet hitemW n a Ya nchep Highwa y !( W istful Parade !]z|BH018!( D r umpel l i er D r i ve !( 6,483,000 6,483,000 Centre y a W !( !(
Eastm a n Road a n Eastm TonkinHighwa y !( Pessoa Road Pessoa
!]z| GLW 8B
Pinea Turn Gaskell Avenue Gaskell !( !( !( !( !(
!( !( !( !( !(
6,482,000 !(!( DulegaWa l y 6,482,000 !( !( !( !]z|!(BH04 !(Gnanga ra Road !( !(!( Nursery Road Nursery !( !( Gnanga ra Road !]z|M340C
!( !( !]z|!( GLW E/94 A n dr ea D r i v e !( !(
!]z|MM60 Robert Street Robert hitemW n a Ya nchep Highwa y 6,481,000 6,481,000 X" !( !]z|MM58 !]z|MM59B
!( !(
DianePlace
JulesSteiner Mem orialDrive
6,480,000 !( 6,480,000 !( !]z| !(!( !( !( BH03 !(!( !( Park Street !]z|MM26 !]z|MM27
Lord Street Lord Dreng Wa y !]z| !( MM53 !]z|MM54B !]z|MM55B !(
6,479,000 Baa l Street 6,479,000 Partridge Street Partridge
Bennett Brook !(
!( Road M urray
B ur n et t R o ad !( !( !(!( !]z|M170A W oollcott Avenue !]z|M150B W oolcott Avenue W oolcottAvenue !]z| GN10 !( 6,478,000 6,478,000
!]z|MM49B !(!( VI l l age C i r cl e !( !]z|MEL07 !( MEL06 !]z|GW8 !( H ep bur n A v en ue !]z| !]z|!( MM71B !]z| MB6/18 MP2B Hennessy Road Hennessy X" !]z|MP2C !( 6,477,000 MP2D !]z| 6,477,000 !( GW11
!(!]z| !( MW10 !( !]z|!( MM33 !]z|MB01 !( !]z| !( !]z|MEL14 !( MEL03 !( !( !]z|MEL02 Harrow Street !( M80C !( !( !( !( !(!( !( !( !( !]z|!( !(!( !( !( !(!( !( !( !]z| !]z| !( !]z|MB02 ]z|!( !( !( !]z| !( M60 MP3C!( !M81 MEL05 !( !( !(!( M80B !]z|MEL01 !( !(!(!( !( !(!( !( !( 6,476,000 !( 6,476,000 oknHgw y Highwa !( Tonkin !( !( !( X" X" !( !( !( !]z|MEL04 !(
!( Street Dulwich !]z|BH023 !( !( !( !]z|BH016 Cra nleigh Street BellefinDrive !]z|BH015 !( Street Lord MM48B!( !( !( !( !( !]z| !( !( MM48C
!( !(!( !( !( !( !(!( !( !]z| !( !( !( !]z|!( !]z|!(!( MW6A M a rsha ll Road MM38 MM46 !]z|MW47 !( !( !( itraM Loop !( !( !(
6,475,000 !( Lum inous Boulevard Coast Road 6,475,000 Source: !( Groundwa terwells fromCoffey and METRONET.
DoWgroundwa terboresfrom BoM . Pass Litoria Proposedrailwa ystations, railwa yalignm M ulgulentsand DEfrom METRONET. Road !(
W a tercoursesfromCoffey. Loop tross Alba Ima geryfromNea rma(ca p ptured28/04/19) !( V ictoria Road Gibson Wa y 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000
no. description drawn approved date LEGEND A ORIGINALISSUE JO NT 05.05.20 !]z| M ETRONETgroundwa terwell (levels) Mwa inor tercourse !]z| M ETRONETgroundwa terwell (levels qua& lity) StudyArea –Ma lagatoEllenbrook Rail Works !(
revision DoWgroundwa terbore (within 500m ofDE) X" Proposedrailwa ystation Proposedrailwa yalignm ent
client: drawn JO ECOLOGICAL AUSTRALIA PTY LTD
project: approved NT M ORLEYTO ELLENBROOK PRELIMINARYSITE INV ESTIGATION date 05.05.2020 PART2 0 0.3 0.6 0.9 1.2 DEPARTM ENTOFWATER (DOW ) scale ASSHOW N title: GROUNDW ATERBORE SEARCH RESULTS SCALE 1:30,000 (A3) km original project no: figure no: rev: Projection:GDA MGA1994 Zone 50 A3
M XD Tem plate Reference: 233882_PSI2_GIS002_v0_5 Reference: Tem plate M XD size 754-PEREN233882 FIGURE2 A 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000 Karba r Pass D u gi t e R o ad
6,484,000 Euro Road Euro
Barlow Lan e Barlow Man glesDrive Trainor Road Millhouse Road X"
MainStreet
W istful Parade
D r u mp el l i er D r i ve 6,483,000 6,483,000 Cen tre y a W
Eastma n Road n Eastma TonkinHighwa y Pessoa Road Pessoa
Pin ea Turn akl vnue Aven Gaskell Leiria Road Leiria
6,482,000 DulegaWa l y 6,482,000 Gna n ga ra Road Gna n ga ra Road Road N ursery
An drea Drive Robert Street Robert 6,481,000 6,481,000 X"
hitemW n a Ya hep c n Highwa y 6,480,000 6,480,000 Park Street
Dren g Wa y Papago Loop Papago 6,479,000 Baa l Street 6,479,000
Bennett Brook
Murray Road Murray
W oollcott Aven ue
WAven oolcott ue W oolcott Aven ue 6,478,000 6,478,000
V I l l age C i r cl e Youle-Dea n Road
H ep bu r n A v enu e
Hen n essy Road nHen essy X" 6,477,000 6,477,000
Harrow Street Dulwic h Street
6,476,000 6,476,000 Lord Street Lord oknHgw y Highwa Tonkin X" X"
BellefinDrive Cran leigh Street Cra n leigh Street
Marsha ll Road
Mitra Loop
6,475,000 Luminous Boulevard Coast Road 6,475,000 Source:
Proposedrailwa railwa ystations, yalign m enan ts dDEfrom METRON ET. Pass Litoria W a tercoursesfromCoffey. Mulgul Road Geomorphicwetlan dsfromDBCA. Alba tross Loop tross Alba Ima geryfromNea rma(ca p ptured28/04/19) Victoria Road Gibson Wa y 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000
no. description drawn approved date LEGEND A ORIGINALISSUE JO NT 05.05.20 X" Proposedrailwa ystation Geomorphicwetlan d Proposedrailwa yalign m en t Conserva tion MultipleUse
revision Minorwa tercourse StudyArea –Ma lagaEllen to b rookRail Works ResourceEnha n c em en t N ot ApplicaN ot b le
client: drawn JO ECOLOGICAL AUSTRALIA PTY LTD
project: approved NT MORLEYTOELLEN BROOK PRELIMINARYSITEINVESTIGATION date 05.05.2020 PART2 0 0.3 0.6 0.9 1.2 title: scale ASSHOW N GEOMORPHICWETLAN DMAP SCALE 1:30,000 (A3) km original project no: figure no: rev: ProjecGDA tion: MGA1994 Zone 50 A3
MX D Tem plate Referen c e: 233882_PSI2_GIS003_v0_5 c e: Referen plate Tem MX D size 754-PEREN 233882 FIGURE3 A 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000 Karba r Pass D ugi t e R o ad
6,484,000 Euro Road Euro
Barlow Lan e Barlow Man glesDrive Trainor Road Millhouse Road X"
MainStreet
W istful Parade
D r ump el l i er D r i ve 6,483,000 6,483,000 Cen tre y a W
Eastma n Road n Eastma TonkinHighwa y Pessoa Road Pessoa
Pin ea Turn akl vnue Aven Gaskell
F 65F Leiria Road Leiria
6,482,000 DulegaWa l y 6,482,000 Gna n ga ra Road Gna n ga ra Road Road N ursery
P405371811 An drea Drive Robert Street Robert 6,481,000 6,481,000 X"
hitemW n a Ya hep c n Highwa y 6,480,000 6,480,000 Park Street
Dren g Wa y Papago Loop Papago 6,479,000 Baa l Street 6,479,000
Bennett Brook
Murray Road Murray
W oollcott Aven ue
WAven oolcott ue W oolcott Aven ue 6,478,000 6,478,000
V I l l age C i r cl e Youle-Dea n Road
H ep bur n A v enue
P410680822
Hen n essy Road nHen essy X" 6,477,000 6,477,000
Harrow Street Dulwic h Street LEGEND
6,476,000 6,476,000 Lord Street Lord oknHgw y Highwa Tonkin X" X" Contam ina tedsite Awa itingClassifica tion P003698607 BellefinDrive Contam inarem ted- ediationrequired Cra n leigh Street P003698613 Contam inarestricted teduse- Dec ontam ina ted Marsha ll Road Street leigh Cran contamN ot inaun ted- restricteduse
Mitra Loop
6,475,000 Lum inous Boulevard Possiblycontam inainvestiga ted- tionCoast Road 6,475,000 required Source: P4045561 Proposedrailwa railwa ystations, yalign m enan ts dDEfrom METRON ET. Rem ediatedrestrictedfor use W a tercoursesfromCoffey. Mulgul Road Contam ina tedfromsitesDW ER. Alba tross Loop tross Alba subReportnot stan tiated Ima geryfromNea rma(ca p ptured28/04/19) Victoria Road Gibson Wa y 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000
no. description drawn approved date LEGEND A ORIGINALISSUE JO NT 05.05.20 X" Proposedrailwa ystation Proposedrailwa yalign m en t Cadastre key
revision Minorwa tercourse P = Plan No. Lot No. StudyArea –Ma lagaEllen to b rookRail Works D = Drawing No. Lot No. E.g. P123456 100
client: drawn JO ECOLOGICAL AUSTRALIA PTY LTD
project: approved NT MORLEYTOELLEN BROOK PRELIMINARYSITEINVESTIGATION date 05.05.2020 PART2 0 0.3 0.6 0.9 1.2 title: scale ASSHOW N CON TAMINATEDSITESIDEN TIFICATIONMAP SCALE 1:30,000 (A3) km original project no: figure no: rev: ProjecGDA tion: MGA1994 Zone 50 A3
MX D Tem plate Referen c e: 233882_PSI2_GIS004_v0_5 c e: Referen plate Tem MX D size 754-PEREN 233882 FIGURE4 A 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000 Karba r Pass D u gi t e R o ad
6,484,000 Euro Road Euro
Barlow Lan e Barlow Man glesDrive Trainor Road Millhouse Road X"
MainStreet
W istful Parade
D r u mp el l i er D r i ve 6,483,000 6,483,000 Cen tre y a W
Eastma n Road n Eastma TonkinHighwa y Pessoa Road Pessoa
Pin ea Turn akl vnue Aven Gaskell Leiria Road Leiria
6,482,000 DulegaWa l y 6,482,000 Gna n ga ra Road Gna n ga ra Road Road N ursery
An drea Drive Robert Street Robert 6,481,000 6,481,000 X"
hitemW n a Ya hep c n Highwa y 6,480,000 6,480,000 Park Street
Dren g Wa y Papago Loop Papago 6,479,000 Baa l Street 6,479,000
Bennett Brook
Murray Road Murray
W oollcott Aven ue
WAven oolcott ue W oolcott Aven ue 6,478,000 6,478,000
V I l l age C i r cl e Youle-Dea n Road
H ep bu r n A v enu e
Hen n essy Road nHen essy X" 6,477,000 6,477,000
Harrow Street Dulwic h Street
6,476,000 6,476,000 Lord Street Lord oknHgw y Highwa Tonkin X" X"
BellefinDrive Cran leigh Street Cra n leigh Street
Marsha ll Road
Mitra Loop
6,475,000 Luminous Boulevard Coast Road 6,475,000 Source:
Proposedrailwa railwa ystations, yalign m enan ts dDEfrom METRON ET. Pass Litoria W a tercoursesfromCoffey. Mulgul Road Acidsulfate soilsfrom DW ER. Alba tross Loop tross Alba Ima geryfromNea rma(ca p ptured28/04/19) Victoria Road Gibson Wa y 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000
no. description drawn approved date LEGEND A ORIGINALISSUE JO NT 05.05.20 X" Proposedrailwa ystation ASSrisk Proposedrailwa yalign m en t Highmoderate to risk Moderatelow riskto
revision Minorwa tercourse StudyArea –Ma lagaEllen to b rookRail Works
client: drawn JO ECOLOGICAL AUSTRALIA PTY LTD
project: approved NT MORLEYTOELLEN BROOK PRELIMINARYSITEINVESTIGATION date 05.05.2020 PART2 0 0.3 0.6 0.9 1.2 title: scale ASSHOW N ACIDSULFATE SOILRISKMAP SCALE 1:30,000 (A3) km original project no: figure no: rev: ProjecGDA tion: MGA1994 Zone 50 A3
MX D Tem plate Referen c e: 233882_PSI2_GIS005_v0_5 c e: Referen plate Tem MX D size 754-PEREN 233882 FIGURE5 A 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000 The Prom ena de
D u gi t e R o ad !]z| 45 BH007 6,484,000 43
44
Euro Road Euro Barlow Lane Barlow Trainor Road M illhouse Road X"!]z| BH022 !]z|BH021
Main S t r eet hitemW n a Ya nchep Highwa y W istful Parade !]z|BH018 39
D r umpel l i er D r i ve 6,483,000 6,483,000
Centre y a W Eastm a n Road a n Eastm
TonkinHighwa y Pessoa Road Pessoa
!]z| GLW 8B
Pinea Turn Gaskell Avenue Gaskell
42 41
6,482,000 DulegaWa l y 6,482,000 !]z| Gnanga ra Road BH04 Gnanga ra Road !]z| Road Nursery M340C 36 40
!]z|GLW E/94 A n dr ea D r i v e
!]z|MM60 Robert Street Robert hitemW n a Ya nchep Highwa y 6,481,000 6,481,000 X" !]z|MM58 !]z|MM59B
38 37
DianePlace 6,480,000 6,480,000 !]z| BH03 Park Street !]z|MM26 !]z|MM27 31
30 32 35 Fairmount Boulevard Dreng Wa y !]z| 33 MM53 !]z|MM54B !]z|MM55B
6,479,000 Baa l Street 6,479,000
Bennett Brook
34 27
M urray Road M urray
W oollcott Avenue !]z|M170A Avenue Baluran !]z|M150B 25 W oolcott Avenue W oolcottAvenue !]z| GN10 6,478,000 6,478,000
!]z|MM49B 24 29 28 VI l l age C i r cl e !]z|MEL07 23 MEL06 !]z|GW8 H ep bur n A v en ue !]z| !]z|MM71B !]z| MB6/18 MP2B Hennessy Road Hennessy X" !]z|MP2C 6,477,000 MP2D !]z|GW11 6,477,000
!]z|MW10 !]z|MM33 MEL03 !]z|MB01 !]z| 19 !]z|MEL14 !]z| M80C MEL02 Harrow Street !]z| !]z|MB02 26 !]z|M60 !]z| !]z| !]z|MEL05 MP3C M81 M80B !]z|MEL01 16 6,476,000 6,476,000 oknHgw y Highwa Tonkin X" X" 18
!]z|MEL04 22 Dulwich Street Dulwich !]z|BH023 !]z|BH016 Cra nleigh Street BellefinDrive !]z|12 BH015 Street Lord 21 17 !]z| 20 MM48C MM48B 13 !]z| !]z| 15 !]z| MW6A M a rsha ll Road MM38 !]z|MW47
itraM Loop MM46 14
6,475,000 Coast Road 6,475,000
Source: Groundwa terwells fromCoffey and METRONET. Proposedrailwa ystations, railwa yalignm M ulgulentsand DEfrom METRONET. Road Groundwa tercontours and wa tercoursesfromCoffey. Alba tross Loop tross Alba Grandis Road Ima geryfromNea rma(ca p ptured28/04/19) V ictoria Road Gibson Wa y 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000
no. description drawn approved date LEGEND A ORIGINALISSUE JO NT 05.05.20 !]z| M ETRONETgroundwa terwell (levels) Inferredgroundwa terflow direction !]z| M ETRONETgroundwa terwell (levels qua& lity) Inferredgroundwa tereleva tion(mAHD)
revision X" Proposedrailwa ystation StudyArea –Ma lagatoEllenbrook Rail Works Proposedrailwa yalignm ent Mwa inor tercourse
client: drawn JO ECOLOGICAL AUSTRALIA PTY LTD
project: approved NT M ORLEYTO ELLENBROOK PRELIMINARYSITE INV ESTIGATION date 05.05.2020 PART2 0 0.3 0.6 0.9 1.2 title: scale ASSHOW N GROUNDW ATERCONTOURS SCALE 1:30,000 (A3) km original project no: figure no: rev: Projection:GDA MGA1994 Zone 50 A3
M XD Tem plate Reference: 233882_PSI2_GIS009_v0_4 Reference: Tem plate M XD size 754-PEREN233882 FIGURE6 A 396,000 397,000 398,000 399,000 400,000 401,000 402,000 403,000 404,000 """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Karba r Pass """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" D u gi t e R o ad 6,484,000 """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Euro Road Euro
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""Lan e Barlow Man glesDrive
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""Trainor Road """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" Millhouse Road """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" X" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" MainStreet
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """""""""""""""""""" """""""""""""""""""" """""""""""""""""""" W istful Parade """"""""""""""""""""
""""""""""""""""""""
D r u mp el l i er D r i ve 6,483,000 6,483,000
Cen tre y a W Eastma n Road n Eastma
Pin ea Turn akl vnue Aven Gaskell
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""" """"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
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client: drawn JO ECOLOGICAL AUSTRALIA PTY LTD
project: approved NT MORLEYTOELLEN BROOK PRELIMINARYSITEINVESTIGATION date 16.04.2020 PART2 0 0.3 0.6 0.9 1.2 title: scale ASSHOW N PUBLICDRINKING WATER SOURCE AREAS SCALE 1:30,000 (A3) km original project no: figure no: rev: ProjecGDA tion: MGA1994 Zone 50 A3
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MX D Tem plate Referen c e: 233882_PSI2_GIS011_v0_3 c e: Referen plate Tem MX D size 754-PEREN 233882 FIGURE8 A
Statement of Limitations
Important information about your Coffey Environmental Report
Introduction Limitations of the Report This report has been prepared by Coffey for you, as The work was conducted, and the report has been Coffey’s client, in accordance with our agreed prepared, in response to an agreed purpose and purpose, scope, schedule and budget. scope, within time and budgetary constraints, and in reliance on certain data and information made The report has been prepared using accepted available to Coffey. procedures and practices of the consulting profession at the time it was prepared, and the opinions, The analyses, evaluations, opinions and conclusions recommendations and conclusions set out in the presented in this report are based on that purpose and report are made in accordance with generally scope, requirements, data or information, and they accepted principles and practices of that profession. could change if such requirements or data are inaccurate or incomplete. The report is based on information gained from environmental conditions (including assessment of This report is valid as of the date of preparation. The some or all of soil, groundwater, vapour and surface condition of the site (including subsurface conditions) water) and supplemented by reported data of the local and extent or nature of contamination or other area and professional experience. Assessment has environmental hazards can change over time, as a been scoped with consideration to industry standards, result of either natural processes or human influence. regulations, guidelines and your specific Coffey should be kept appraised of any such events requirements, including budget and timing. The and should be consulted for further investigations if characterisation of site conditions is an interpretation any changes are noted, particularly during of information collected during assessment, in construction activities where excavations often reveal accordance with industry practice. subsurface conditions. This interpretation is not a complete description of all In addition, advancements in professional practice material on or in the vicinity of the site, due to the regarding contaminated land and changes in inherent variation in spatial and temporal patterns of applicable statues and/or guidelines may affect the contaminant presence and impact in the natural validity of this report. Consequently, the currency of environment. Coffey may have also relied on data and conclusions and recommendations in this report other information provided by you and other qualified should be verified if you propose to use this report individuals in preparing this report. Coffey has not more than 6 months after its date of issue. verified the accuracy or completeness of such data or information except as otherwise stated in the report. The report does not include the evaluation or For these reasons the report must be regarded as assessment of potential geotechnical engineering interpretative, in accordance with industry standards constraints of the site. and practice, rather than being a definitive record. Interpretation of factual data Your report has been written for a specific Environmental site assessments identify actual purpose conditions only at those points where samples are taken and on the date collected. Data derived from Your report has been developed for a specific purpose indirect field measurements, and sometimes other as agreed by us and applies only to the site or area reports on the site, are interpreted by geologists, investigated. Unless otherwise stated in the report, engineers or scientists to provide an opinion about this report cannot be applied to an adjacent site or overall site conditions, their likely impact with respect area, nor can it be used when the nature of the specific to the report purpose and recommended actions. purpose changes from that which we agreed. Variations in soil and groundwater conditions may For each purpose, a tailored approach to the occur between test or sample locations and actual assessment of potential soil and groundwater conditions may differ from those inferred to exist. No contamination is required. In most cases, a key environmental assessment program, no matter how objective is to identify, and if possible quantify, risks comprehensive, can reveal all subsurface details and that both recognised and potential contamination pose anomalies. Similarly, no professional, no matter how in the context of the agreed purpose. Such risks may well qualified, can reveal what is hidden by earth, rock be financial (for example, clean up costs or constraints or changed through time. on site use) and/or physical (for example, potential health risks to users of the site or the general public).
Coffey Page 1 of 2 Issued: 5 July 2017
The actual interface between different materials may how other professionals have incorporated the report be far more gradual or abrupt than assumed based on findings. the facts obtained. Nothing can be done to change the Given Coffey prepared the report and has familiarity actual site conditions which exist, but steps can be with the site, Coffey is well placed to provide such taken to reduce the impact of unexpected conditions. assistance. If another party is engaged to interpret the For this reason, parties involved with land acquisition, recommendations of the report, there is a risk that the management and/or redevelopment should retain the contents of the report may be misinterpreted and services of a suitably qualified and experienced Coffey disowns any responsibility for such environmental consultant through the development misinterpretation. and use of the site to identify variances, conduct additional tests if required, and recommend solutions Data should not be separated from the report to unexpected conditions or other unrecognised The report as a whole presents the findings of the site features encountered on site. Coffey would be pleased assessment and the report should not be copied in to assist with any investigation or advice in such part or altered in any way. Logs, figures, laboratory circumstances. data, drawings, etc. are customarily included in our Recommendations in this report reports and are developed by scientists or engineers based on their interpretation of field logs, field testing This report assumes, in accordance with industry and laboratory evaluation of samples. This information practice, that the site conditions recognised through should not under any circumstances be redrawn for discrete sampling are representative of actual inclusion in other documents or separated from the conditions throughout the investigation area. report in any way. Recommendations are based on the resulting This report should be reproduced in full. No interpretation. responsibility is accepted for use of any part of this Should further data be obtained that differs from the report in any other context or for any other purpose or data on which the report recommendations are based by third parties. (such as through excavation or other additional Responsibility assessment), then the recommendations would need to be reviewed and may need to be revised. Environmental reporting relies on interpretation of factual information using professional judgement and Report for benefit of client opinion and has a level of uncertainty attached to it, Unless otherwise agreed between us, the report has which is much less exact than other design disciplines. been prepared for your benefit and no other party. This has often resulted in claims being lodged against Other parties should not rely upon the report or the consultants, which are unfounded. As noted earlier, accuracy or completeness of any recommendation the recommendations and findings set out in this and should make their own enquiries and obtain report should only be regarded as interpretive and independent advice in relation to such matters. should not be taken as accurate and complete information about all environmental media at all Coffey assumes no responsibility and will not be liable depths and locations across the site. to any other person or organisation for, or in relation to, any matter dealt with or conclusions expressed in the report, or for any loss or damage suffered by any other person or organisation arising from matters dealt with or conclusions expressed in the report. To avoid misuse of the information presented in your report, we recommend that Coffey be consulted before the report is provided to another party who may not be familiar with the background and the purpose of the report. In particular, an environmental disclosure report for a property vendor may not be suitable for satisfying the needs of that property’s purchaser. This report should not be applied for any purpose other than that stated in the report. Interpretation by other professionals Costly problems can occur when other professionals develop their plans based on misinterpretations of a report. To help avoid misinterpretations, a suitably qualified and experienced environmental consultant should be retained to explain the implications of the report to other professionals referring to the report and then review plans and specifications produced to see
Coffey Page 2 of 2 Issued: 5 July 2017
Appendix A - Basic Summary of Records
Page 1 of 2
Contaminated Sites Act 2003 Basic Summary of Records Search Response
Report generated at 05:50:15AM, 12/12/2019
Receipt No: RR015007
ID No: 68749 Search Results This response relates to a search request received for: 53 Cheltenham St Bennett Springs, WA, 6063
This parcel belongs to a site that contains 1 parcel(s). According to Department of Water and Environmental Regulation records, this land has been reported as a known or suspected contaminated site.
Address 53 Cheltenham St Bennett Springs, WA, 6063
Lot on Plan Lot 607 On Plan 3698 Address
Parcel Status Classification: 28/06/2016 - Report not substantiated Nature and Extent of Contamination: No contamination has been identified.
Restrictions on Use: Please refer to Reasons for Classification for further information relevant to the use of the site.
Reason for Classification: This site was reported to the Department of Environment Regulation (DER) under section 11 of the 'Contaminated Sites Act 2003' (the Act), which commenced on 1 December 2006. The site has been classified under section 13 of the Act based on information submitted to DER by May 2016.
The site was reported because fill sand was imported to the site from an unknown source that was suspected of containing fragments of asbestos containing material (ACM) that has the potential to pose a risk to human health.
On 9 June 2016, DER and officers from the Department of Health carried out a site inspection. The fill sand was found to contain small pieces of building rubble including fragments of cement sheeting. Two fragments of suspected ACM were identified by visual inspection. The remaining fragments of cement sheeting were determined not to contain asbestos.
The Department of Health officers concluded that although occasional small fragments of ACM may be present within the fill, it was not present at levels that would pose an unacceptable risk to human health in accordance with the 'Guidelines for the Assessment, Remediation and Management of Asbestos-Contaminated Sites in Western Australia' (Department of Health, May 2009). DER concurred with the Department of Health's conclusions.
The report of a known or suspected contaminated site, in conjunction with DER and Department of
Disclaimer This Summary of Records has been prepared by Department of Water and Environmental Regulation (DWER) as a requirement of the Contaminated Sites Act 2003. DWER makes every effort to ensure the accuracy, currency and reliability of this information at the time it was prepared, however advises that due to the ability of contamination to potentially change in nature and extent over time, circumstances may have changed since the information was originally provided. Users must exercise their own skill and care when interpreting the information contained within this Summary of Records and, where applicable, obtain independent professional advice appropriate to their circumstances. In no event will DWER, its agents or employees be held responsible for any loss or damage arising from any use of or reliance on this information. Additionally, the Summary of Records must not be reproduced or supplied to third parties except in full and unabridged form. Page 2 of 2
Contaminated Sites Act 2003 Basic Summary of Records Search Response
Report generated at 05:50:15AM, 12/12/2019
Health inspection of the site, has provided insufficient grounds to indicate that possible contamination of the site. As such, the site is classified as 'report not substantiated'.
If further information regarding possible contamination of the site is submitted to DER, it will be reviewed and the site may be reclassified.
DER, in consultation with the Department of Health, has classified this site based on the information available to DER at the time of classification. It is acknowledged that the contamination status of the site may have changed since the information was collated and/or submitted to DER, and as such, the usefulness of this information may be limited.
In accordance with Department of Health advice, if groundwater is being, or is proposed to be abstracted, DER recommends that analytical testing should be carried out to determine whether the groundwater is suitable for its intended use.
Certificate of Title Nil Memorial
Current Regulatory Type of Regulatory Notice: Nil Notice Issued Date Issued: Nil
General No other information relating to this parcel.
Disclaimer This Summary of Records has been prepared by Department of Water and Environmental Regulation (DWER) as a requirement of the Contaminated Sites Act 2003. DWER makes every effort to ensure the accuracy, currency and reliability of this information at the time it was prepared, however advises that due to the ability of contamination to potentially change in nature and extent over time, circumstances may have changed since the information was originally provided. Users must exercise their own skill and care when interpreting the information contained within this Summary of Records and, where applicable, obtain independent professional advice appropriate to their circumstances. In no event will DWER, its agents or employees be held responsible for any loss or damage arising from any use of or reliance on this information. Additionally, the Summary of Records must not be reproduced or supplied to third parties except in full and unabridged form. Page 1 of 2
Contaminated Sites Act 2003 Basic Summary of Records Search Response
Report generated at 06:05:22AM, 12/12/2019
Receipt No: RR015007
ID No: 10960 Search Results This response relates to a search request received for: Road Reserve: 650m section of Gnangara Road, Lexia west of the former Waste Water Disposal entrance at the junction (PIN 1154 3278). This parcel belongs to a site that contains 2 parcel(s). According to Department of Water and Environmental Regulation records, this land has been reported as a known or suspected contaminated site.
Address Road Reserve: 650m section of Gnangara Road, Lexia west of the former Waste Water Disposal entrance at the junction (PIN 1154 3278).
Parcel Status Classification: 06/07/2007 - Possibly contaminated - investigation required Nature and Extent of Contamination: Groundwater in the superficial (shallow) aquifer beneath this Affected Site is contaminated with ammonia and heavy metals.
The groundwater plume originates from a former liquid waste disposal Site to the north of Gnangara Road and extends some 500m to the south of Gnangara Road. Restrictions on Use: Please refer to Reasons for Classification for further information on the contamination present at the Site. Reason for Classification: This Site was originally reported to the Department of Environment and Conservation (DEC) prior to the commencement of the "Contaminated Sites Act 2003". The Site was also reported to DEC as per reporting obligations under section 11 of the 'Contaminated Sites Act 2003', which commenced on 1 December 2006. The Site classification is based on information submitted to DEC by 21 May 2007.
The Site to the north of Gnangara Road (the Source Site) was formerly used as a sewage effluent treatment facility and waste disposal site, a land use that has the potential to cause contamination, as specified in the guideline 'Potentially Contaminating Activities, Industries and Landuses' (Department of Environment, 2004). The site falls within the Priority 1 source protection area of the Gnangara Underground Water Pollution Control Area.
DEC understands that the Source Site was used for the treatment and disposal of domestic sewage effluent from November 1971 until 1982. The Site was temporarily re-opened in 1987 and operated between August 1987 and November 1988. Although the Site was only authorized to accept domestic waste, various trade and industrial wastes are also suspected of having been deposited at the Site.
The operational area of the Site comprised a number of unlined pits in which liquid waste underwent sedimentation/anaerobic digestion over a three to five month period, followed by oxidation and
Disclaimer This Summary of Records has been prepared by Department of Water and Environmental Regulation (DWER) as a requirement of the Contaminated Sites Act 2003. DWER makes every effort to ensure the accuracy, currency and reliability of this information at the time it was prepared, however advises that due to the ability of contamination to potentially change in nature and extent over time, circumstances may have changed since the information was originally provided. Users must exercise their own skill and care when interpreting the information contained within this Summary of Records and, where applicable, obtain independent professional advice appropriate to their circumstances. In no event will DWER, its agents or employees be held responsible for any loss or damage arising from any use of or reliance on this information. Additionally, the Summary of Records must not be reproduced or supplied to third parties except in full and unabridged form. Page 2 of 2
Contaminated Sites Act 2003 Basic Summary of Records Search Response
Report generated at 06:05:22AM, 12/12/2019
evaporation. Given that the pits were unlined, liquid wastes are likely to have leaked, leading to contamination of underlying soil and groundwater which lies between 3 and 10 meters below the base of the pits. Contamination of soils is also likely to have occurred as a result of the burial of digested sludges on-Site.
Soil investigations have not been carried out and the quality of soil at the Site is unknown.
DEC understands that a groundwater monitoring network of sixteen wells was installed in 1976 and monitored biannually between 1976 and 1982. However, the results of the monitoring programme were not available to DEC Land and Water Quality Branch at the time of classification. Further groundwater investigations were undertaken in 1993 and 1994 to determine if disposal practices at the Site were contaminating groundwater in the Gnangara Underground Water Pollution Control Area.
The groundwater investigations carried out in 1994 identified a contaminant plume extending from the Source Site in a south to southeasterly direction and affecting land south of Gnangara Road. Ammonia and heavy metals were present in groundwater at concentrations exceeding Australian Drinking Water Guidelines and Aquatic Ecosystems - Freshwater, as published in 'Assessment Levels for Soil, Sediment and Water' (Department of Environment, 2003).
Concentrations of contaminants have been found to exceed adopted assessment levels for potable water for human consumption and ecological investigation levels. A Screening Risk Assessment has therefore indicated that further investigation is required to determine the risk to human health, the environment and environmental values.
In January 1995, the then Department of Environmental Protection requested the continual assessment and monitoring of the plume and provision of reports on a regular basis. No further monitoring information has been received.
Without further investigations into the current status of soil and groundwater contamination at the Site, DEC cannot comment on the suitability of the site for the current landuses (State Forest and public water supply).
As there are grounds to indicate possible soil and groundwater contamination of the site, the site is classified as 'possibly contaminated - investigation required'.
DEC has classified this site based on the information available at the time of classification. It is acknowledged that the contamination status may have changed since this time, and as such the usefulness of this information may be limited.
Certificate of Title Under the Contaminated Sites Act 2003, this site has been classified as "Possibly contaminated - Memorial investigation required". For further information on the contamination status of this site, please contact the Department of Environment. Current Regulatory Type of Regulatory Notice: Nil Notice Issued Date Issued: Nil
General No other information relating to this parcel.
Disclaimer This Summary of Records has been prepared by Department of Water and Environmental Regulation (DWER) as a requirement of the Contaminated Sites Act 2003. DWER makes every effort to ensure the accuracy, currency and reliability of this information at the time it was prepared, however advises that due to the ability of contamination to potentially change in nature and extent over time, circumstances may have changed since the information was originally provided. Users must exercise their own skill and care when interpreting the information contained within this Summary of Records and, where applicable, obtain independent professional advice appropriate to their circumstances. In no event will DWER, its agents or employees be held responsible for any loss or damage arising from any use of or reliance on this information. Additionally, the Summary of Records must not be reproduced or supplied to third parties except in full and unabridged form. Page 1 of 2
Contaminated Sites Act 2003 Basic Summary of Records Search Response
Report generated at 06:14:18AM, 12/12/2019
Receipt No: RR015007
ID No: 69260 Search Results This response relates to a search request received for: Lexia, WA, 6065 Approximate spatial representation of Gnangara Liquid Waste Disposal Site (Landfill) Gnangara, located within Reserve State Forest 65, Lexia WA 6065 (central co-ordinate: Latitude -31.7933, Longitude 115.9514 Landgate PIN 1149 8130) This parcel belongs to a site that contains 1 parcel(s). According to Department of Water and Environmental Regulation records, this land has been reported as a known or suspected contaminated site.
Address Lexia, WA, 6065 Approximate spatial representation of Gnangara Liquid Waste Disposal Site (Landfill) Gnangara, located within Reserve State Forest 65, Lexia WA 6065 (central co-ordinate: Latitude -31.7933,
Parcel Status Classification: 06/07/2007 - Possibly contaminated - investigation required Nature and Extent of Contamination: Groundwater beneath the Source Site is contaminated with ammonia and heavy metals.
In 1994, the plume was 600m wide and 1000m long of which 500m was within Whiteman Park. The plume extended to the full extent of the superficial (shallow) aquifer below the Site. Restrictions on Use: Please refer to Reasons for Classification for further information on the contamination present at the Site. Reason for Classification: This Site was originally reported to the Department of Environment and Conservation (DEC) prior to the commencement of the "Contaminated Sites Act 2003". The Site was also reported to DEC as per reporting obligations under section 11 of the 'Contaminated Sites Act 2003', which commenced on 1 December 2006. The Site classification is based on information submitted to DEC by 21 May 2007.
The Site to the north of Gnangara Road (the Source Site) was formerly used as a sewage effluent treatment facility and waste disposal site, a land use that has the potential to cause contamination, as specified in the guideline 'Potentially Contaminating Activities, Industries and Landuses' (Department of Environment, 2004). The site falls within the Priority 1 source protection area of the Gnangara Underground Water Pollution Control Area.
DEC understands that the Source Site was used for the treatment and disposal of domestic sewage effluent from November 1971 until 1982. The Site was temporarily re-opened in 1987 and operated between August 1987 and November 1988. Although the Site was only authorized to accept domestic waste, various trade and industrial wastes are also suspected of having been deposited at the Site.
The operational area of the Site comprised a number of unlined pits in which liquid waste underwent sedimentation/anaerobic digestion over a three to five month period, followed by oxidation and
Disclaimer This Summary of Records has been prepared by Department of Water and Environmental Regulation (DWER) as a requirement of the Contaminated Sites Act 2003. DWER makes every effort to ensure the accuracy, currency and reliability of this information at the time it was prepared, however advises that due to the ability of contamination to potentially change in nature and extent over time, circumstances may have changed since the information was originally provided. Users must exercise their own skill and care when interpreting the information contained within this Summary of Records and, where applicable, obtain independent professional advice appropriate to their circumstances. In no event will DWER, its agents or employees be held responsible for any loss or damage arising from any use of or reliance on this information. Additionally, the Summary of Records must not be reproduced or supplied to third parties except in full and unabridged form. Page 2 of 2
Contaminated Sites Act 2003 Basic Summary of Records Search Response
Report generated at 06:14:18AM, 12/12/2019
evaporation. Given that the pits were unlined, liquid wastes are likely to have leaked, leading to contamination of underlying soil and groundwater which lies between 3 and 10 meters below the base of the pits. Contamination of soils is also likely to have occurred as a result of the burial of digested sludges on-Site.
Soil investigations have not been carried out and the quality of soil at the Site is unknown.
DEC understands that a groundwater monitoring network of sixteen wells was installed in 1976 and monitored biannually between 1976 and 1982. However, the results of the monitoring programme were not available to DEC Land and Water Quality Branch at the time of classification. Further groundwater investigations were undertaken in 1993 and 1994 to determine if disposal practices at the Site were contaminating groundwater in the Gnangara Underground Water Pollution Control Area.
The groundwater investigations carried out in 1994 identified a contaminant plume extending from the Source Site in a south to southeasterly direction and affecting land south of Gnangara Road. Ammonia and heavy metals were present in groundwater at concentrations exceeding Australian Drinking Water Guidelines and Aquatic Ecosystems - Freshwater, as published in 'Assessment Levels for Soil, Sediment and Water' (Department of Environment, 2003).
Concentrations of contaminants have been found to exceed adopted assessment levels for potable water for human consumption and ecological investigation levels. A Screening Risk Assessment has therefore indicated that further investigation is required to determine the risk to human health, the environment and environmental values.
In January 1995, the then Department of Environmental Protection requested the continual assessment and monitoring of the plume and provision of reports on a regular basis. No further monitoring information has been received.
Without further investigations into the current status of soil and groundwater contamination at the Site, DEC cannot comment on the suitability of the site for the current landuses (State Forest and public water supply).
As there are grounds to indicate possible soil and groundwater contamination of the site, the site is classified as 'possibly contaminated - investigation required'.
DEC has classified this site based on the information available at the time of classification. It is acknowledged that the contamination status may have changed since this time, and as such the usefulness of this information may be limited.
Certificate of Title Under the Contaminated Sites Act 2003, this site has been classified as "Possibly contaminated - Memorial investigation required". For further information on the contamination status of this site, please contact the Contaminated Sites section of the Department of Environment & Conservation. Current Regulatory Type of Regulatory Notice: Nil Notice Issued Date Issued: Nil
General No other information relating to this parcel.
Disclaimer This Summary of Records has been prepared by Department of Water and Environmental Regulation (DWER) as a requirement of the Contaminated Sites Act 2003. DWER makes every effort to ensure the accuracy, currency and reliability of this information at the time it was prepared, however advises that due to the ability of contamination to potentially change in nature and extent over time, circumstances may have changed since the information was originally provided. Users must exercise their own skill and care when interpreting the information contained within this Summary of Records and, where applicable, obtain independent professional advice appropriate to their circumstances. In no event will DWER, its agents or employees be held responsible for any loss or damage arising from any use of or reliance on this information. Additionally, the Summary of Records must not be reproduced or supplied to third parties except in full and unabridged form.
Appendix B – Groundwater Bore Search
Groundwater Bore Information
Bore ID Groundwater Area Site Name Catchment Locality
61603095 Mirrabooka Swan Coastal Swan Avon – Lower Henley Brook Catchment 616 – Swan Bore
61603258 Mirrabooka Swan Coastal Swan Avon – Lower Henley Brook Catchment 616 – Swan Bore
61603343 Mirrabooka Swan Coastal Swan Avon – Lower Henley Brook Catchment 616 – Swan Bore
61611029 Mirrabooka Mirrabooka Swan Avon – Lower Henley Brook Observation – M380 Swan
61615093 Mirrabooka Artesian Monitoring Swan Avon – Lower Ellenbrook – AM30 Swan
61615094 Mirrabooka Artesian Monitoring Swan Avon – Lower Ellenbrook – AM30A Swan
61615095 Mirrabooka Artesian Monitoring Swan Avon – Lower Ellenbrook – AM30B Swan
61615096 Mirrabooka Artesian Monitoring Swan Avon – Lower Ellenbrook – AM30C Swan
16115144 Mirrabooka Mirrabooka Swan Avon – Lower Henley Brook Production – L300 Swan
61615812 Mirrabooka Swan Coastal Swan Avon – Lower Henley Brook Catchment 616 – Swan Bore
61670384 Mirrabooka Ellenbrook – Swan Avon – Lower Ellenbrook Company Swan
61670402 Mirrabooka Henley Brook – Swan Avon – Lower Henley Brook Private Swan
61671784 Mirrabooka Henley Brook - Swan Avon – Lower Henley Brook Private Swan
61602856 Mirrabooka Swan Coastal Swan Avon – Lower Brabham Catchment 616 – Swan 711
61602857 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan 712
61603310 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan Bore
Coffey Services Australia Pty Ltd 1 ABN 55 139 460 521
Bore ID Groundwater Area Site Name Catchment Locality
61603383 Swan Swan Coastal Swan Avon – Lower Dayton Catchment 616 – Swan Bore
61610515 Mirrabooka Mussel Pool – Swan Avon – Lower Whiteman MP3A Swan
61610516 Mirrabooka Mussel Pool – Swan Avon – Lower Whiteman MP3B Swan
61610517 Mirrabooka Mussel Pool – Swan Avon – Lower Whiteman MP3C Swan
61610548 Mirrabooka Mirrabooka Swan Avon – Lower Bennett Springs Observation – Swan M80A
61610549 Mirrabooka Mirrabooka Swan Avon – Lower Bennett Springs Observation – Swan M80B
61610550 Mirrabooka Mirrabooka Swan Avon – Lower Bennett Springs Observation – Swan M80C
61610551 Swan Mirrabooka Swan Avon – Lower Dayton Observation – M81 Swan
61610552 Mirrabooka Mirrabooka Swan Avon – Lower Brabham Monitoring – Swan MM50B
61610553 Mirrabooka Mirrabooka Swan Avon – Lower Brabham Monitoring – Swan MM50A
61612358 Mirrabooka North East Corridor Swan Avon – Lower Brabham – NE 1_14 Swan
6163364 Mirrabooka Bennett Brook Swan Avon - Lower Brabham Albion Townsite - Swan Drain
6163835 Mirrabooka Bennett Brook Swan Avon – Lower Whiteman Catchment – DS Swan Mussel Pool
61670618 Swan Dayton - Private Swan Avon – Lower Dayton Swan
61602784 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan Gnangara No.28
61602785 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan Gnangara No 28 A
61602786 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan Gnangara No 28 B
61602858 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616-713 Swan
Coffey Services Australia Pty Ltd ABN 55 139 460 521 2
Bore ID Groundwater Area Site Name Catchment Locality
61602984 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan Mussel Pool
61602985 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan No 1 Mussel Pool
61602986 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – 20 Swan Mussel Pool
61602995 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan Mirrabooka No 55
61603015 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan Bore
61603309 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – Swan Bore
61610479 Mirrabooka Mirrabooka Swan Avon – Lower Whiteman Observation – M50 Swan
61610480 Mirrabooka Mirrabooka Swan Avon – Lower Whiteman Production – M50 Swan
61610481 Mirrabooka Mirrabooka - Swan Avon – Lower Cullacabardee Monitoring MM31 Swan
61610482 Mirrabooka Mussel Pool – Swan Avon – Lower Whiteman MP1A Swan
61610483 Mirrabooka Mussel Pool – Swan Avon – Lower Whiteman MP1B Swan
61610484 Mirrabooka Mussel Pool – Swan Avon – Lower Whiteman MP1C Swan
61610513 Mirrabooka Mirrabooka Swan Avon – Lower Whiteman Observation – M60 Swan
61610514 Mirrabooka Mirrabooka Swan Avon – Lower Whiteman Observation – M70 Swan
61610518 Mirrabooka Mirrabooka Swan Avon – Lower Whiteman Monitoring – MM33 Swan
61610523 Mirrabooka Mirrabooka Swan Avon – Lower Whiteman Production – M60 Swan
61615049 Mirrabooka Mirrabooka Swan Avon – Lower Whiteman Production – M55 Swan
61615801 Mirrabooka Whiteman Mussell Swan Avon – Lower Whiteman Pool – B – 305mm Swan
61615802 Mirrabooka Swan Coastal Swan Avon – Lower Whiteman Catchment 616 – C Swan – Mussell Pool
Coffey Services Australia Pty Ltd ABN 55 139 460 521 3
Bore ID Groundwater Area Site Name Catchment Locality
6163362 Mirrabooka Bennett Brook – Swan Avon - Lower Whiteman Upstream Mussell Pool
61670378 Mirrabooka Whiteman - Swan Avon – Lower Whiteman Company Swan
Coffey Services Australia Pty Ltd ABN 55 139 460 521 4
Appendix C – Certificates of Title
REGISTER NUMBER 811/DP405371 DUPLICATE DATE DUPLICATE ISSUED EDITION WESTERN AUSTRALIA 4 26/6/2018
VOLUME FOLIO RECORD OF CERTIFICATE OF TITLE 2925 245 UNDER THE TRANSFER OF LAND ACT 1893
The person described in the first schedule is the registered proprietor of an estate in fee simple in the land described below subject to the reservations, conditions and depth limit contained in the original grant (if a grant issued) and to the limitations, interests, encumbrances and notifications shown in the second schedule.
REGISTRAR OF TITLES
LAND DESCRIPTION: LOT 811 ON DEPOSITED PLAN 405371
REGISTERED PROPRIETOR: (FIRST SCHEDULE)
WESTERN AUSTRALIAN PLANNING COMMISSION OF 140 WILLIAM STREET PERTH WA 6000 (XF N617688 ) REGISTERED 8/5/2017
LIMITATIONS, INTERESTS, ENCUMBRANCES AND NOTIFICATIONS: (SECOND SCHEDULE) 1. THE RIGHT TO MINES OF COAL OR OTHER MINERALS BEING EXCLUDED FROM PORTION OF THE SAID LAND 2. EXCEPT AND RESERVING METALS, MINERALS, GEMS AND MINERAL OIL SPECIFIED IN TRANSFER 428/1908. AS TO LOCATION 1315. 3. EXCEPT AND RESERVING METALS, MINERALS, GEMS AND MINERAL OIL SPECIFIED IN TRANSFER 4286/1911. AS TO LOCATION 1315. 4. EXCEPT AND RESERVING METALS, MINERALS, GEMS AND MINERAL OIL SPECIFIED IN TRANSFER 7299/1948. AS TO LOCATION 1315. 5. T7927/1960 SUBJECT TO CERTAIN MINERAL AND OTHER RESERVATIONS AS SET OUT IN TRANSFER 7927/1960 WHICH ARE IN ADDITION TO THOSE RESERVATIONS TO THE CROWN CONTAINED IN THE ORIGINAL GRANT. REGISTERED 1/1/1960. 6. 25557/1967 SUBJECT TO CERTAIN MINERAL AND OTHER RESERVATIONS AS SET OUT IN TRANSFER 25557/1967 WHICH ARE IN ADDITION TO THOSE RESERVATIONS TO THE CROWN CONTAINED IN THE ORIGINAL GRANT. REGISTERED 1/1/1967. 7. *H024480 CAVEAT BY VODAFONE NETWORK PTY LTD AS TO PORTION ONLY. LODGED 11/2/1999. 8. *H073596 CAVEAT BY VODAFONE NETWORK PTY LTD AS TO PORTION ONLY. LODGED 7/4/1999. 9. H876276 LEASE TO OPTUS MOBILE PTY LTD OF OPTUS CENTRE, 101 MILLER STREET, NORTH SYDNEY, NEW SOUTH WALES AS TO PORTION ONLY. EXPIRES: SEE LEASE. REGISTERED 21/9/2001. I460439 TRANSFER OF LEASE H876276, LESSEE NOW CROWN CASTLE AUSTRALIA PTY LTD OF LEVEL 1, 754 PACIFIC HIGHWAY, CHATSWOOD, NEW SOUTH WALES REGISTERED 28/4/2003. 10. H876277 LEASE TO OPTUS MOBILE PTY LTD OF OPTUS CENTRE, 101 MILLER STREET, NORTH SYDNEY, NEW SOUTH WALES AS TO PORTION ONLY. EXPIRES: SEE LEASE. REGISTERED 21/9/2001.
END OF PAGE 1 - CONTINUED OVER
LANDGATE COPY OF ORIGINAL NOT TO SCALE 03/02/2020 03:29 PM Request number: 60281678
www.landgate.wa.gov.au RECORD OF CERTIFICATE OF TITLE
REGISTER NUMBER: 811/DP405371 VOLUME/FOLIO: 2925-245 PAGE 2
I460439 TRANSFER OF LEASE H876277, LESSEE NOW CROWN CASTLE AUSTRALIA PTY LTD OF LEVEL 1, 754 PACIFIC HIGHWAY, CHATSWOOD, NEW SOUTH WALES REGISTERED 28/4/2003. 11. I518799 LEASE TO HUTCHISON 3G AUSTRALIA PTY LTD OF BUILDING A, 207 PACIFIC HIGHWAY, ST LEONARDS, NEW SOUTH WALES AS TO PORTION ONLY. EXPIRES: SEE LEASE. REGISTERED 17/6/2003. 12. I637085 LEASE TO AUSTRALIAN MARITIME SAFETY AUTHORITY OF 25 CONSTITUTION AVENUE, CANBERRA, AUSTRALIAN CAPITAL TERRITORY. EXPIRES: SEE LEASE. REGISTERED 24/9/2003. 13. J045358 LEASE TO OPTUS MOBILE PTY LTD OF OPTUS CENTRE, 101 MILLER STREET, NORTH SYDNEY, NEW SOUTH WALES AS TO PORTION ONLY. EXPIRES: SEE LEASE. REGISTERED 7/10/2004. 14. J045359 LEASE TO OPTUS MOBILE PTY LTD OF OPTUS CENTRE, 101 MILLER STREET, NORTH SYDNEY, NEW SOUTH WALES AS TO PORTION ONLY. EXPIRES: SEE LEASE. REGISTERED 7/10/2004. 15. J070881 LEASE TO TELSTRA CORPORATION LTD OF 80 STIRLING STREET, PERTH AS TO PORTION ONLY. EXPIRES: SEE LEASE. REGISTERED 1/11/2004. 16. M432735 LEASE TO CROWN CASTLE AUSTRALIA PTY LTD OF LEVEL 1, 754 PACIFIC HIGHWAY, CHATSWOOD, NEW SOUTH WALES EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 16/10/2013. 17. *M628565 CAVEAT BY TELSTRA CORPORATION LTD AS TO PORTION ONLY. LODGED 6/5/2014. 18. N211376 LEASE TO DAVID ERIC THORNE, CYNTHIA PATRICIA THORNE, BOTH OF 4090 WEST SWAN ROAD WEST SWAN WA 6055, DAVID LEE THORNE OF 14 VERMONT APPROACH HOCKING WA 6065 AS TO PORTION ONLY.. EXPIRES: SEE LEASE. REGISTERED 23/12/2015. 19. N512482 LEASE TO MOTOR MUSEUM OF WESTERN AUSTRALIA PTY LTD OF CHAIRMAN MOTOR MUSEUM OF WESTERN AUSTRALIA WHITEMAN PARK LORD STREET WHITEMAN WA 6068 EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 16/12/2016. *N512483 CAVEAT AFFECTING LEASE N512482, CAVEAT BY LOTTERIES COMMISSION AS TO PORTION ONLY LODGED 16/12/2016. 20. *N541644 CAVEAT BY TELSTRA CORPORATION LIMITED AS TO PORTION ONLY LODGED 30/1/2017. 21. N583714 LEASE TO PROFIT MANAGEMENT GROUP PTY LTD OF OF C/- HAYDON KINNIARD, UNIT 2, 171-173 MAIN STREET OSBORNE PARK EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 23/3/2017. 22. N583715 LEASE TO MONIQUE LOUISE URBAS, GEOFFREY EDWARD URBAS, JARRYD GEOFFREY URBAS, ALL OF PO BOX 931 JURIEN BAY EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 23/3/2017. 23. N583716 LEASE TO WHITEMAN PARK CRAFT ASSOCIATION (INC) OF WHITEMAN PARK, 99A LORD STREET WHITEMAN EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 23/3/2017. 24. N583717 LEASE TO BUS PRESERVATION SOCIETY OF WESTERN AUSTRALIA (INC) OF LOT 99 LORD STREET WHITEMAN WA 6068 EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 23/3/2017. 25. N806356 LEASE TO OPTUS MOBILE PTY LIMITED OF 1 LYONPARK ROAD MACQUARIE PARK NSW 2113 EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 11/1/2018. 26. N846996 LEASE TO DBNGP (WA) NOMINEES PTY LIMITED OF LEVEL 6 12-14 THE ESPLANADE PERTH EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 8/3/2018. N846997 MORTGAGE OF LEASE N846996 TO WESTPAC BANKING CORPORATION AS TO PORTION ONLY REGISTERED 8/3/2018. 27. N926657 LEASE TO STILMARK HOLDINGS PTY LTD OF LEVEL 1 37-45 MYRTLE STREET CHIPPENDALE NSW 2008 EXPIRES: SEE LEASE. AS TO PORTION ONLY REGISTERED 22/6/2018.
Warning: A current search of the sketch of the land should be obtained where detail of position, dimensions or area of the lot is required. * Any entries preceded by an asterisk may not appear on the current edition of the duplicate certificate of title.
END OF PAGE 2 - CONTINUED OVER
LANDGATE COPY OF ORIGINAL NOT TO SCALE 03/02/2020 03:29 PM Request number: 60281678
www.landgate.wa.gov.au RECORD OF CERTIFICATE OF TITLE
REGISTER NUMBER: 811/DP405371 VOLUME/FOLIO: 2925-245 PAGE 3
Lot as described in the land description may be a lot or location.
------END OF CERTIFICATE OF TITLE------
STATEMENTS: The statements set out below are not intended to be nor should they be relied on as substitutes for inspection of the land and the relevant documents or for local government, legal, surveying or other professional advice.
SKETCH OF LAND: DP405371 PREVIOUS TITLE: 2136-556 PROPERTY STREET ADDRESS: 233 DRUMPELLIER DR, WHITEMAN. LOCAL GOVERNMENT AUTHORITY: CITY OF SWAN RESPONSIBLE AGENCY: WESTERN AUSTRALIAN PLANNING COMMISSION
LANDGATE COPY OF ORIGINAL NOT TO SCALE 03/02/2020 03:29 PM Request number: 60281678
www.landgate.wa.gov.au
Appendix D – Aerial Photography
397,000 398,000 399,000 400,000 401,000 402,000 403,000
X" 6,483,000 6,483,000 6,482,000 6,482,000 6,481,000 6,481,000 X" 6,480,000 6,480,000 6,479,000 6,479,000 6,478,000 6,478,000
X" 6,477,000 6,477,000
BENNETT BROOK
6,476,000 X" X" 6,476,000 6,475,000 6,475,000
SITE AERIAL IMAGE SOURCE: Landgate 397,000 398,000 399,000 400,000 401,000 402,000 403,000
no. description drawn approved date LEGEND A ORIGINAL ISSUE JO NT 07.02.20 X" Proposed railway station Proposed Development Envelope - Part 2 Proposed railway alignment Minor watercourse revision
client: drawn JO ECO LOGICAL AUSTRALIA PTY LTD
project: approved NT MORLEY TO ELLENBROOK PRELIMINARY SITE INVESTIGATION date 07.02.2020 PART 2 APPENDIX E
0 0.3 0.6 0.9 1.2 scale AS SHOWN title: AERIAL PHOTO (1953) SCALE 1:28,000 (A3) km original project no: figure no: rev: Projection: GDA 1994 MGA Zone 50 A3 754-PEREN233882 FIGURE 1 A
MXD Template Reference: 233882_PSI2_GIS006_v0_2 Reference: Template MXD size 397,000 398,000 399,000 400,000 401,000 402,000 403,000
X" 6,483,000 6,483,000 6,482,000 6,482,000 6,481,000 6,481,000 X" 6,480,000 6,480,000 6,479,000 6,479,000 6,478,000 6,478,000
X" 6,477,000 6,477,000
BENNETT BROOK
6,476,000 X" X" 6,476,000 6,475,000 6,475,000
SITE AERIAL IMAGE SOURCE: Landgate 397,000 398,000 399,000 400,000 401,000 402,000 403,000
no. description drawn approved date LEGEND A ORIGINAL ISSUE JO NT 07.02.20 X" Proposed railway station Proposed Development Envelope - Part 2 Proposed railway alignment Minor watercourse revision
client: drawn JO ECO LOGICAL AUSTRALIA PTY LTD
project: approved NT MORLEY TO ELLENBROOK PRELIMINARY SITE INVESTIGATION date 07.02.2020 PART 2 APPENDIX E
0 0.3 0.6 0.9 1.2 scale AS SHOWN title: AERIAL PHOTO (1989) SCALE 1:28,000 (A3) km original project no: figure no: rev: Projection: GDA 1994 MGA Zone 50 A3 754-PEREN233882 FIGURE 1 A
MXD Template Reference: 233882_PSI2_GIS007_v0_2 Reference: Template MXD size 397,000 398,000 399,000 400,000 401,000 402,000 403,000
X" 6,483,000 6,483,000 6,482,000 6,482,000 6,481,000 6,481,000 X" 6,480,000 6,480,000 6,479,000 6,479,000 6,478,000 6,478,000
X" 6,477,000 6,477,000
BENNETT BROOK
6,476,000 X" X" 6,476,000 6,475,000 6,475,000
SITE AERIAL IMAGE SOURCE: Landgate 397,000 398,000 399,000 400,000 401,000 402,000 403,000
no. description drawn approved date LEGEND A ORIGINAL ISSUE JO NT 07.02.20 X" Proposed railway station Proposed Development Envelope - Part 2 Proposed railway alignment Minor watercourse revision
client: drawn JO ECO LOGICAL AUSTRALIA PTY LTD
project: approved NT MORLEY TO ELLENBROOK PRELIMINARY SITE INVESTIGATION date 07.02.2020 PART 2 APPENDIX E
0 0.3 0.6 0.9 1.2 scale AS SHOWN title: AERIAL PHOTO (2003) SCALE 1:28,000 (A3) km original project no: figure no: rev: Projection: GDA 1994 MGA Zone 50 A3 754-PEREN233882 FIGURE 1 A
MXD Template Reference: 233882_PSI2_GIS008_v0_2 Reference: Template MXD size
Appendix E – DMIRS Search Results
Your ref 754-PEREN233882 – Site Assessment and Remediation 2
Our ref 19/20-226: A0085/202001
Enquiries Liz Haddon-Cave 08 9358 8147
Ms G Pethebridge Coffey Services Australia Pty Ltd
Sent by email to: [email protected]
Dear Ms Pethebridge
Scope of Your application sought access to the following information relating to 106 Request: Bennett Springs Drive, Beechboro, WA 6063 (Lot 106 on Plan 56775): . Documents related to spills and/or incidents (and investigation reports); . Dangerous goods licences (historical and current); . Documents related to audits and or inspections of dangerous goods/spills/incidents; and . Documents related to above ground or below ground storage tanks.
Date of 21 January 2020. Decision:
Decision For the reasons set out below, it has been decided by Liz Haddon-Cave, and Coordinator Freedom of Information, Corporate Information Management Decision (delegated decision maker by a general directive provided under Maker: s100(1)(b) of the Act), to deny access to the documents fulfilling the scope of the application in accordance with s.26 of the Act.
The Facts: 1. Based on the information provided, a search of our records was conducted in order to locate documents to fulfil the scope of this request. The search included our Geographic Information System (GIS), records management system and HAZMAN database. However, no documentation falling within the scope of your request was found.
2. Under s.26 of the Act, the failure of the department to locate any documents after a thorough and diligent search is deemed as a refusal to grant access.
000875.Michelle.HAWTHORNE.docx Mineral House 100 Plain Street East Perth Western Australia 6004 Release Classification: - Departmental Use Telephone +61 8 9222 3333 Facsimile +61 8 9222 3862 Only www.dmirs.wa.gov.au ABN 69 410 335 356
3. Location descriptors provided by applicants may not always match site location details in our database and we ask, if possible, for applicants to provide the dangerous goods storage (DGS) licence number of the site of interest to them. We recognise this is not always possible and do all we reasonably can to search for the site from the information provided.
4. The lack of information held by the department in relation to this property does not necessarily mean the property is not, or has never been, a dangerous goods storage site. Accordingly, if you have any reason to suspect the property is or may have been the subject of a DGS licence or dangerous goods may have been stored there, you may need to consider carrying out additional site inspection investigations.
Review If you wish to contest the decision to refuse access, you have a right to Process: have the decision reviewed. Details of the review process are attached.
Please do not hesitate to contact me on 9358 8147 if you require any further information regarding this matter.
Yours sincerely
______Liz Haddon-Cave Coordinator Freedom of Information Corporate Services Group - Corporate Information Management Branch 21 January 2020
000875.Michelle.HAWTHORNE.docx Page 2 of 2 Release Classification: - Departmental Use Only
Your ref 754-PEREN233882 – Site Assessment and Remediation 2
Our ref 19/20-227: A0086/202001
Enquiries Liz Haddon-Cave 08 9358 8147
Ms G Pethebridge Coffey Services Australia Pty Ltd
Sent by email to: [email protected]
Dear Ms Pethebridge
Scope of Your application sought access to the following information relating to the Request: road reserve 650m section of Gnangara Road, Lexia, west of the former Waste Water Disposal entrance at the junction (PIN 1154 3278): . Documents related to spills and/or incidents (and investigation reports); . Dangerous goods licences (historical and current); . Documents related to audits and or inspections of dangerous goods/spills/incidents; and . Documents related to above ground or below ground storage tanks.
Date of 21 January 2020. Decision:
Decision For the reasons set out below, it has been decided by Liz Haddon-Cave, and Coordinator Freedom of Information, Corporate Information Management Decision (delegated decision maker by a general directive provided under Maker: s100(1)(b) of the Act), to deny access to the documents fulfilling the scope of the application in accordance with s.26 of the Act.
The Facts: 1. Based on the information provided, a search of our records was conducted in order to locate documents to fulfil the scope of this request. The search included our Geographic Information System (GIS), records management system and HAZMAN database. However, no documentation falling within the scope of your request was found.
2. Under s.26 of the Act, the failure of the department to locate any documents after a thorough and diligent search is deemed as a refusal to grant access.
000876.Michelle.HAWTHORNE.docx Mineral House 100 Plain Street East Perth Western Australia 6004 Release Classification: - Departmental Use Telephone +61 8 9222 3333 Facsimile +61 8 9222 3862 Only www.dmirs.wa.gov.au ABN 69 410 335 356
3. Location descriptors provided by applicants may not always match site location details in our database and we ask, if possible, for applicants to provide the dangerous goods storage (DGS) licence number of the site of interest to them. We recognise this is not always possible and do all we reasonably can to search for the site from the information provided.
4. The lack of information held by the department in relation to this property does not necessarily mean the property is not, or has never been, a dangerous goods storage site. Accordingly, if you have any reason to suspect the property is or may have been the subject of a DGS licence or dangerous goods may have been stored there, you may need to consider carrying out additional site inspection investigations.
Review If you wish to contest the decision to refuse access, you have a right to Process: have the decision reviewed. Details of the review process are attached.
Please do not hesitate to contact me on 9358 8147 if you require any further information regarding this matter.
Yours sincerely
______Liz Haddon-Cave Coordinator Freedom of Information Corporate Services Group - Corporate Information Management Branch 21 January 2020
000876.Michelle.HAWTHORNE.docx Page 2 of 2 Release Classification: - Departmental Use Only
Your ref 754-PEREN233882 – Site Assessment and Remediation 2
Our ref 19/20-225: A0084/202001
Enquiries Liz Haddon-Cave 08 9358 8147
Ms G Pethebridge Coffey Services Australia Pty Ltd
Sent by email to: [email protected]
Dear Ms Pethebridge
Scope of Your application sought access to the following information relating to the Request: Gnangara Liquid Waste Disposal Site (Landfill) Gnangara, located within reserve State Forest 65, Lexia, WA ,6065: . Documents related to spills and/or incidents (and investigation reports); . Dangerous goods licences ( historical and current); . Documents related to audits and or inspections of dangerous goods/spills/incidents; and . Documents related to above ground or below ground storage tanks.
Date of 21 January 2020. Decision:
Decision For the reasons set out below, it has been decided by Liz Haddon-Cave, and Coordinator Freedom of Information, Corporate Information Management Decision (delegated decision maker by a general directive provided under Maker: s100(1)(b) of the Act), to deny access to the documents fulfilling the scope of the application in accordance with s.26 of the Act.
The Facts: 1. Based on the information provided, a search of our records was conducted in order to locate documents to fulfil the scope of this request. The search included our Geographic Information System (GIS), records management system and HAZMAN database. However, no documentation falling within the scope of your request was found.
2. Under s.26 of the Act, the failure of the department to locate any documents after a thorough and diligent search is deemed as a refusal to grant access.
000874.Michelle.HAWTHORNE.docx Mineral House 100 Plain Street East Perth Western Australia 6004 Release Classification: - Departmental Use Telephone +61 8 9222 3333 Facsimile +61 8 9222 3862 Only www.dmirs.wa.gov.au ABN 69 410 335 356
3. Location descriptors provided by applicants may not always match site location details in our database and we ask, if possible, for applicants to provide the dangerous goods storage (DGS) licence number of the site of interest to them. We recognise this is not always possible and do all we reasonably can to search for the site from the information provided.
4. The lack of information held by the department in relation to this property does not necessarily mean the property is not, or has never been, a dangerous goods storage site. Accordingly, if you have any reason to suspect the property is or may have been the subject of a DGS licence or dangerous goods may have been stored there, you may need to consider carrying out additional site inspection investigations.
Review If you wish to contest the decision to refuse access, you have a right to Process: have the decision reviewed. Details of the review process are attached.
Please do not hesitate to contact me on 9358 8147 if you require any further information regarding this matter.
Yours sincerely
______Liz Haddon-Cave Coordinator Freedom of Information Corporate Services Group - Corporate Information Management Branch 21 January 2020
000874.Michelle.HAWTHORNE.docx Page 2 of 2 Release Classification: - Departmental Use Only
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