Electricity, natural gas and diesel fuel used by mining equipment are the main
sources of greenhouse gas (GHG) emissions at Eneabba. The Iluka Eneabba
operations currently have a shortfall of 12MW as the supply of additional electrical
power from the Western Power Corporation (WPC) grid has been limited. No spare
capacity will be available until power supply lines are upgraded in the Midwest
region. As a result, a temporary on-site power generation system was constructed
during 2011 utilizing gas fired reciprocating engines to supply the 12MW shortfall.
Construction and commissioning work for the power station was undertaken under
DEC Works Approval W5057/2011/1. The Proposal will utilise this temporary on-site
power generation until the upgrade of the power supply lines are complete (date
2.8.4 Have you done any modelling or analysis to demonstrate that air quality standards
Dry mining operations typically generate fugitive dust associated with mining,
processing and transport activities.
Dust monitoring is undertaken in accordance with DEC Licence 5646/8, on a
continual basis at the Iluka Eneabba operation using both ambient particulate
) and total suspended particulates (TSP) methods.
Particulate Dust Monitoring (PM
) is undertaken at the location of the ‘most
network of depositional dust gauges has also been deployed to monitor nuisance
dust conditions along the property boundary and sensitive vegetation locations.
The ambient airborne dust concentration limit prescribed in the DEC licence
levels excel 50ug/m
within the period. A total of 5 excursions above this limit are
Further details are provided in the Supporting Document.
2.8.5 Will the proposal result in liquid effluent discharge?
concentrations and receiving environment.
2.8.6 If there is likely to be discharges to a watercourse or marine environment, has any
Strategy or other appropriate standards will be able to be met?
2.8.7 Will the proposal produce or result in solid wastes?
concentrations and disposal location/ method.
Solid waste produced by the Proposal can be divided into process waste and
tailings and non-process waste.
Process waste is waste produced as a result of the mining process and includes the
Green waste – where possible, vegetation will be mulched prior to clearing and
the mine void during mining. Stockpiled overburden will be returned to the mine
void during the rehabilitation phase.
approximately 2.4mm to be removed from the ore. All material greater than
2.4mm will be removed in the screening process, in a number of stages. The
oversize will be treated as overburden and returned to the mining void or
utilised for dust suppression and road maintenance activities.
concentrator processing by hydro-cyclones. Sand tailings will be produced in
the mine site wet-concentrator. The sand tails fraction of the mining by-
products will be placed in the mined-out void. The clay/slime fraction will be co-
disposed with the remaining sand tails in an off-path tailings storage facility.
Iluka maintains a detailed waste inventory of all waste disposal at Eneabba
5646/8. Non-process waste is waste produced as a result of the day to day
operations of the Proposal and includes the following:
of Iluka’s waste management system. Hydrocarbon contaminated soil resulting
from spills are treated in a bioremediation facility (‘landfarm’) on-site. This is
regulated through DEC Licence 5646/8. All other hydrocarbon-contaminated
waste will be removed from site and disposed of according to DEC
Structural waste – some structural waste will be generated from maintenance
accordance with DEC Licence 5646/8. Scarp steel is recycled through a scrap
metal merchant where possible.
wrappings and waste paper is collected and disposed of at the Eneabba Class
II landfill facility (DEC Licence 6945/10).
2.8.8 Will the proposal result in significant off-site noise emissions?
2.8.9 Will the development be subject to the Environmental Protection (Noise)
demonstrate that the proposal will comply with
Please attach the analysis.
The Proposal involves mining of the northern section of the IPL North deposit which
is located in close proximity to the Eneabba townsite. Mining of the northern portion
of the Proposal area therefore has the greatest potential to impact on nearby
residents. The primary noise emitters for the Proposal will be the fixed plant and
mobile mining equipment.
2.8.10 Does the proposal have the potential to generate off-site, air quality impacts, dust,
“sensitive premises” such as schools and hospitals (proposals in this category may
include intensive agriculture, aquaculture, marinas, mines and quarries etc.)?
to residences and other “sensitive premises”.
Mining operations may give rise to dust emissions and carbon monoxide,
particulate and nitrogen oxides emissions from standard diesel and petrol
combustion engines. The South Secondary Concentrator (SSC) generates
emissions from two driers which are fuelled with natural gas, in two separate
stacks. Emissions are sampled quarterly by qualified consultants, with results
reported annually in the Annual Environment Report (AER). Contaminants include
particulates, carbon dioxide, uranium and thorium, all of which are below guideline
levels. All fugitive and point source emissions to air are reported in the National
2.8.11 If the proposal has a residential component or involves “sensitive premises”, is it
to the potential pollution source
2.9 Greenhouse Gas Emissions
2.9.1 Is this proposal likely to result in substantial greenhouse gas emissions (greater
than 100 000 tonnes per annum of carbon dioxide equivalent emissions)?
gross emissions in absolute and in carbon
dioxide equivalent figures.
Electricity, natural gas and diesel are the main sources of greenhouse gas (GHG)
emissions at Iluka’s Eneabba operations. Electricity is generally supplied from the
WPC grid and used for powering of concentrators, field generators, groundwater
production bores and for general use in the administration buildings and workshops.
GHGs are directly emitted from the use of natural gas in the drying process at the
SSC. Diesel fuel is used to run the heavy vehicle mining fleet, mobile pumps,
generators and light vehicles.
Due to the shortfall in the supply of additional electrical power from the WPC grid, it
is envisaged that a temporary on-site power generation system will be required.
There is currently an existing on-site power generations system utilizing gas fired
reciprocation engines to supply the existing shortfall. It is expected that there will be
an increase in increase in natural gas consumption until the electrical power
shortfall is rectified with the upgrading of the WPC power grid.
2.9.2 Further, if yes, please describe proposed measures to minimise emissions, and any
Iluka has a range of management measures in place to optimise energy use and
reduce GHG emissions. Iluka maintains an annual inventory of GHG emissions and
energy consumption in line with the National Greenhouse and Energy Reporting Act
2007. Additionally, Iluka has participated in the Federal Government's Energy
Efficiency Opportunities (EEO) programme since 1999, the purpose of which is to
assess energy use and process efficiencies at operational sites, and to identify and
implement opportunities to work in a more energy efficient manner. During the
current EEO reporting cycle, 99.1% of Iluka’s total energy consumption was
assessed, exceeding the requirements of the programme.
During 2011, Iluka identified, implemented and pursued a range of energy efficiency
projects that deliver gains in energy efficiency and performance. Overall, the energy
efficiency opportunities that were operational during 2010 – 2011 equated to a
reduction in energy usage of 0.76 petajoules or 8% of Iluka’s total energy
consumption. Iluka remains focused on sustaining the gains from these energy
efficiency opportunities and are committed to ensuring that energy efficiency
remains embedded in its operations as part of its continuous improvement process.
2.10.1 Has the property on which the proposal is to be located been used in the past for
activities which may have caused soil or groundwater contamination?
Mining has occurred at Eneabba since the 1970s and Iluka reported all known and
suspected contaminated sites at its Eneabba operations in May 2007 to the DEC
under the Contaminated Sites Act 2003. Included in this submission were the
completed Form 1’s, associated Certificates of Title and supporting reports.
Contaminated Site Status Report – Eneabba Operations was submitted to the DEC
during August 2010 and provides a status update on the known and suspected
contaminated sites, including the classification, investigations, monitoring and future
2.10.2 Has any assessment been done for soil or groundwater contamination on the site?
Groundwater monitoring is carried out for all the known or suspected contaminated
sites in accordance with the Eneabba Groundwater Licence Operating Strategy
(GLOS) as regulated by the Department of Water (DoW). Soil analysis at one of
the known contaminated sites was carried out to determine the levels of
hydrocarbon contamination. Hydrocarbon impacted soils were excavated and
transferred the site bioremediation facility, where all contaminated soil on-site is
remediated in accordance with DEC licence conditions. Details of soil and
groundwater contamination assessments are discussed in the Contaminated Sites
Status Report – Eneabba Operations as submitted to the DEC during 2010.
2.10.3 Has the site been registered as a contaminated site under the Contaminated Sites
The contaminated sites were reported in the Contaminated Sites Status Report –
Eneabba Operations as submitted to the DEC during 2010.
2.11 Social Surroundings
2.11.1 Is the proposal on a property which contains or is near a site of Aboriginal
ethnographic or archaeological significance that may be disturbed?
The Proposal area falls within one registered native title claim namely, Amangu
native title claimant group (WC04/2).
Archaeological and ethnographic surveys have been conducted on a number of
Iluka Eneabba tenements (AM70/267, M70/821, M70/1039, E70/2634, M70/872,
M70/879, M70/1039 and M70/1061).
An archaeological survey of AM70/267 discovered one site comprising a small
quarts artefact scatter bordering the northwest corner of the South Eneabba
Wetland (McDonald et al., 1992) and has remained undisturbed due to the
conservation of the wetland by Iluka. This site is not within the Proposal area.
A search of the DIA Register of Aboriginal sites during March 2012 indicated that
there are no registered sites within the Proposal area.
2.11.2 Is the proposal on a property which contains or is near a site of high public interest
Iluka will work continuously with the community of Eneabba regarding mining
operations within the Proposal area.
2.11.3 Will the proposal result in or require substantial transport of goods, which may
3.1 Principles of Environmental Protection
as set out in section 4A of the EP Act? (For information on the Principles of
Environmental Protection, please see EPA Position Statement No. 7, available on
the EPA website)
1. The precautionary principle.
The principle of the conservation of biological
diversity and ecological integrity.
3.1.2 Is the proposal consistent with the EPA’s Environmental Protection
Guidelines/Guidance Statements (available on the EPA website)?
The following EPA position and guidance statements are relevant to this Proposal
and have been considered in this Referral and in the Supporting Document:
EPA Position Statement No. 2: Environmental Protection of Native Vegetation
EPA Position Statement No. 3: Terrestrial Biological Surveys
EPA Position Statement No. 6: Towards Sustainability
EPA Position Statement No. 7: Principles of Environmental Protection
EPA Position Statement No 8: Environmental Protection in Natural Resource
EPA Guidance Statement No 19: Environmental Offsets
EPA Guidance Statement No. 33: Environmental Guidance for Planning and
Environmental Impact Assessment in Western Australia.
EPA Guidance Statement No. 55: Implementing Best Practice in proposals
Impact Assessment in Western Australia.
EPA Draft Environmental Assessment Guidelines No. 1: Defining a Proposal
3.2.1 Has public consultation taken place (such as with other government agencies,
community groups or neighbours), or is it intended that consultation shall take
comments or summarise response on a
Stakeholders in the immediate surrounds of the Proposal include residents,
business owners in the town of Eneabba, people within the local shire, special
interest groups (including research organisations), other mining proponents and
Decision Making Authorities.
Table 3 Key stakeholders
Department of Sustainability, Environment, Water,
Population and Communities (SEWPAC)
Environmental Protection Authority (EPA)
Department of Environment and Conservation (DEC)
Department of Mines and Petroleum (DMP)
Department of State Development (DSD)
Department of Water (DoW)
Department of Indigenous Affairs (DIA)
Mineral Sands Agreement Rehabilitation Coordination
Main Roads Western Australia (MRWA)
Shire of Carnamah
City of Greater Geraldton
Amangu (Yamatji Land and Sea Council)
Conservation Council of WA
Wildflower Society of WA
Eneabba town residents and nearby landholders
Eneabba Progress Association
Irwin Land Care Group
Kings Park and Botanical Gardens Authority
University of Western Australia
Murdoch University (Centre for Phytophthora Science and
Iluka has consulted with the DEC, OEPA, DMP, DSD, DoW and Water Corporation
limited to, those summarised below:
The Proposal and mine schedule.
Additional approvals likely to be required under legislation.
The key environmental impacts associated with mining the IPL North deposit
including impact to DRF and Priority flora, fauna, noise and dust within proximity
to the Eneabba townsite, protection of the town water supply and rehabilitation
of the disturbed areas.
Iluka has also consulted with the Shire of Carnamah, Eneabba Progress
session was held at the Eneabba Recreation Centre on Monday, 14th May 2012 to
discuss current and future mining at the Iluka Eneabba operations. In general,
concerns raised included the increase of dust with regard to mining in the vicinity of
the Eneabba townsite.
Outcomes and response of stakeholders consulted prior to the submission of this
AECOM (2012) Eneabba East Mine: 2011 Annual Aquifer Review. Unpublished report
prepared for Iluka Resources Limited.
Bamford Consulting Ecologists (2007a) Fauna Values of Proposed Future Mining Areas in
the Eneabba Region. Unpublished report prepared for Iluka Resources Limited.
Bamford Consulting Ecologists (2007b) Survey for the Shield-backed Trapdoor Spider
(Idiosoma nigrum) in Iluka lease areas at Eneabba. Unpublished report prepared for Iluka
Bamford Consulting Ecologists (2009) Fauna Investigations of Iluka’s Proposed Eneabba
Future Mining Operations with a focus on IPL North and IPL South Deposits. Unpublished
report prepared for Iluka Resources Limited.
Bancroft, W.J. and Bamford, M.J. (2006) Fauna Review – Eneabba. Unpublished report
Department of Water (DOW) (2008) Eneabba Water Reserve Drinking Water Source
Protection Plan – Eneabba Town Water Supply. Report 82, Water Resource Protection
Series. Government of Western Australia.
Environmental Protection Authority (EPA) (2004) Guidance for the Assessment of
Environmental Factors No. 51: Terrestrial Flora and Vegetation Surveys for Environmental
Impact Assessment in Western Australia.
Iluka Resources Limited (2012) Annual Environmental Report – Midwest Operations 2011.
Johnstone, R.E. and Kirkby, T. (2009) Further Assessment of Signficiant Habitat for
Carnaby’s Cockatoo (Calyptorhynchus latirostris) in the Eneabba Region. Unpublished
McDonald, Hales & Associates (1992) Archaeological and ethnographic survey for
Aboriginal sites – AMC Mineral Sands Project, Eneabba.
Soil Water Consultants (SWC) (2009) Rehabilitation Review for the Eneabba Minesite.
Unpublished report prepared for Iluka Resources Limited.
Woodman Environmental Consulting (2012) Eneabba: Summary report of Flora and
Vegetation Studies 2001 to 2011. Report prepared for Iluka Resources Limited.