EPA Reports

Completed assessment reports are listed and summarised below and are available for download. Click the link to view and download archived reports.

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Note: Appeals are handled by the Appeals Convenor who is independent of the EPA. Information on preparing and lodging appeals, appeal reports and the Minister's decisions on appeals are available on the Office of the Appeals Convenor's website.


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No.Report
367

Proposed secondary treatment plant Picton Bunbury, Ravensthorpe

Status: Final
Proponent: Ravensthorpe Mining and Investment Co Ltd
Release Date: 1 November 1985
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236

Proposed rare earth processing plant

Summary:

Allied Eneabba in conjunction with Asahi Chemical Industry Co Ltd is currently assessing the feasibility of treating monazite and xenotime to produce a variety of rare earth products.

The Company has proposed a treatment plant for its Narngulu property with disposal of the low level radioactive waste from the project either at its Eneabba Mine Site or at Narngulu.

The major environmental issues include considerations of thorium residue disposal, evaporation pond management and radiation safety. The good groundwater, and difficulty in modelling groundwater movement at Eneabba and generally poor groundwater at Narngulu were major factors determining the outcome of the environmental impact assessment.

As there is some uncertainty as to the final ownership of the monazite processing plant, the Authority stresses that its conclusions and recommendations should apply, no matter what the ownership might be, assuming that the environmental management commitments remain valid.

It is concluded that the project would be environmentally acceptable and construction could commence prior to finalising residue disposal and evaporation pond details if the Company abides by its environmental management commitments as described in the ERMP/draft EIS and Supplement, and if the recommendations in this report are followed.


Status: Final
Proponent: Allied Eneabba Ltd
Release Date: 1 November 1985
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240

Proposed cyclepath on the Swan River Foreshore (Milne Street, Bayswater to Mitchell St, Mt Lawley)

Summary:

The Environmental Protection Authority has assessed the proposal by the Department of Local Government (as co-ordinator of Metropolitan Cycleways) to construct a cyclepath predominantly on the river foreshore from Milne Street Bayswnter (just upstream from the Garratt Road bridge) to Mitchell Street, Mount Lawley. The proposal envisaged using the access track being constructed for building the SECWA's Caversham - East Perth gas pipeline lateral as a base.

The EPA has concluded that subject to the environmental management provisions in the Public Environmental Report prepared for the project and its recommendations in this report, the section of the proposed cyclepath from Milne Street, Bayswater to Bardon Park, Maylands is acceptable environmentally.

However the Authority on the evidence made available to it, does not consider that a surface cyclepath from the section Bardon Park, Maylands to Mitchell Street, Mount Lawley is a viable option at this time because agreement has not been reached with a private property owner affected and because the proposal as presented (and variations put forward on it) has not demonstrated that potential environmental impacts are manageable in a manner acceptable to the Authority.

The EPA considers that there are two viable options for linking this section of cyclepath: either via road reserves or by an elevated structure across the wetland concerned. It is considered likely that the cost of the latter option could preclude its implementation.


Status: Final
Proponent: Department of Local Government
Release Date: 1 November 1985
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220

Draft Management Plan Proposed M10 Marine Park, Trigg Island to Burns including Marmion Reef

Summary:

The System 6 Committee (Department of Conservation and Environment, 1981) made the following recommendations for the metropolitan location M 10 (offshore reefs - Ocean Reef to Trigg:

M 10.1 The Environmental Protection Authority (EPA) should commission a study of the Sorrento-Mullaloo reefs with the aim of recommending the establishment of an Aquatic Reserve.

M 10.2 Marine life should be conserved through revision of regulations to prevent any fishing except by line.

The EPA reviewed those recommendations and, in late 1983 (EPA, 1983), made the following recommendations:

M 10.1 That our general recommendations on planning and management of Regional Parks be applied to this area.

M 10.2 That a study of the area be commissioned by the Environmental Protection Authority with the aim of establishing a marine reserve to be managed for the purposes of scientific research, education, conservation and recreation.

M 10.3 That, subject to the implementation of M 10.2, a management plan be prepared for the Reserve.

In February 1985, the Department of Conservation and Environment (DCE) in response to a Government directive commenced a study to comply with these recommendations of the EPA.

The M 10 study team was given the following terms of reference:

(i) to characterise and describe the marine environments and marine communities of the area, and produce a report on the findings of the study,

(ii) to identify and evaluate present and future impacts on the proposed M 10 marine reserve, and

(iii) after consideration of (i) and (ii) above, and in consultation with representatives of the user-groups with interests in the proposed M 10 marine reserve area, to frame a management plan for the proposed reserve, with respect to scientific research, education, conservation and recreation.

This draft management plan partially fulfils the terms of reference (ii) and (iii) above, and has been produced in consultation with representatives from over 65 organisations and user-groups.

Since the announcement on June 11, 1985, by State Government that the Hillarys Boat Harbour construction would proceed, the study team has not considered further a management plan for the study area without this boat harbour.

This document is intended for discussion and comment by those organisations and members of the general public. Comments received will be taken into consideration during production of the final management plan.


Status: Final
Release Date: 2 October 1985
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229

Wind-Drive Circulation in Princess Royal Harbour - results from a numerical model

Summary: The combined influence of bathymetry, wind speed and wind direction on the local wind-induced water circulation of Princess Royal Harbour was examined using a numerical hydrodynamic model. Initially, flows through the harbour entrance were neglected, i.e. the harbour was treated as a closed water body. The results of this investigation showed that north to west winds promote large scale anti-clockwise circulation, and east to south winds favour large scale clockwise circulation. South-west winds generate two counter-rotating gyres. The results also suggest that the rate of flushing of waters on the shallow western margin of the harbour is strongly dependent on wind direction as well as on wind speed. Winds blowing along the length of the harbour and the shallows are much more efficient agents of water replacement than are winds blowing across the shallows, from the south-west.
Status: Final
Release Date: 1 October 1985
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232

The impact of proposed roads on wetlands in the Perth metropolitan region

Summary:

On 20th January, 1986 State Cabinet approved the release of this consultant's Report.

Cabinet resolved that decision-making authorities should have regard to the study and should consult the Department of Conservation and Environment during the planning stages, and before any decisions are made, concerning any planned works identified in this Report. The primary purpose of this Report is as an information source.


Status: Final
Release Date: 1 October 1985
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215

Technical report on suspended matter in Mermaid Sound, Dampier Archipelago

Summary: This report presents data from a study (1981-1983) of the spatial and temporal variations in levels of suspended matter in the water column using sediment traps in Mermaid Sound, Dampier Archipelago. Seasonal wind conditions and wave energy regimes were analysed and related to suspended loads to determine the possible causes of these variations. Light attenuation was also measured and trends assessed in relation to suspended matter. Trap data were indicative of the degree of resuspension of sediment at a site and not of net sedimentation rates.
Status: Final
Release Date: 1 October 1985
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233

Roadworks and wetlands in the Perth metropolitan region: recommendations for conflict resolution

Summary:

In late 1984 a public controversy arose over the construction of Farrington Road through Roe Swamp in Kardinya. This controversy and its subsequent resolution highlighted the existence of a number of inconsistencies or administrative and procedural problems in the general planning process for road construction in wetland areas.

In an attempt to avoid repetition of the Farrington Road controversy, the Government of Western Australia through the Department of Conservation and Environment (DCE), initiated a study to identify potential conflicts between future road works and wetlands in the Perth Metropolitan Region, and provide recommendations for their resolution.

In November 1984, LeProvost, Semeniuk & Chalmer, Environmental Consultants (LSC) were commissioned by DCE to undertake the study. The report on the findings of the study, entitled "The Impact of Proposed Roads on Wetlands in the Perth Metropolitan Region", was submitted to DCE in August, 1985. That report is a technical document which details the methodology, rationale of the approach adopted, results of the study, and justifies the recommendations.

This report summarises the results, conclusions and recommendations of that study to assist in public dissemination of the information collated.


Status: Final
Release Date: 1 October 1985
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219

Boddington gold mine proposal

Summary:

The Worsley Alumina Joint Venturers (JV) have proposed a gold/bauxite mining operation of up to 3 million tpa over at least 15 years. This would be within their Principal Mineralised Area in the north eastern Darling Range. The main features of the project are the mine, processing and, water supply reservoir, tailings dams and power supply. All are within the catchment of 34 Mile Brook, a tributary of the Hotham River. The 1 200 ha project would be predominantly on private land. However, some 90 ha of State Forest would be affected. 34 Mile Brook has been proposed by the Western Australian Water Authority as a public water supply source because of its low salinity.

The assessment report considers the information provided in the Environmental Review and Management Programme together with submissions from the public and Government Departments and further details provided by the JV. Issues discussed include flora and fauna, forest disease, residue disposal, salinity downstream water supply, rehabilitation, social effects and reporting. The main requirement of project environmental management will be the long term maintenance of the 34 Mile Brook water quality.


Status: Final
Proponent: Worsley Alumina Joint Venturers
Release Date: 1 October 1985
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226

Big Brook Dam - Pemberton

Summary:

Potable water supplies to the Pemberton townsite are provided from the Pemberton Weir, located on Lefroy Brook. The demand is divided between the town and the Pemberton trout hatchery. While the Pemberton Weir has the capacity to provide all water requirements for both, summer river flows are such that supply restrictions are sometimes necessary. These are imposed on the trout hatchery, which then has to curtail its operations.

To provide an assured water supply to the trout hatchery, the Water Authority of WA, in conjunction with the Department of Fisheries, the operator of the hatchery, investigated a range of supply options. The outcome has been the proposal to construct a dam on Big Brook, a tributary of Lefroy Brook.

The Hon Minister for Water Resources referred the proposal to the EPA, which indicated that the project should be subject to public review, by means of a Public Environmental Report (PER). A period of 6 weeks was recommended for public release. The submission period closed on 2 September 1985.


Status: Final
Proponent: Water Authority of Western Australia
Release Date: 1 October 1985
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216

Proposed chlor-alkali plant

Summary: CSBP & Farmers Ltd (CSBP) proposes to construct and operate a 10,000 tonne per annum chlor-alkali plant within the Kwinana industrial area. The plant, to be built in two stages, each of 5,000 tonnes per annum, would produce chlorine, caustic soda, hydrogen, hydrochloric acid, and sodium hypochlorite.
Status: Final
Proponent: CSBP & Farmers Ltd
Release Date: 1 September 1985
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218

Mineralogical variation within the Marine sediments of the Dampier Region: a dynamic approach

Summary:

Sediments of the Dampier Archipelago and surrounding areas are composed of carbonates derived from coral, coralline algal and invertebrate skeletal debris. The carbonate-rich mineralogy contrasts with that of the Precambrian crystalline metasediments and igneous bedrock which forms much of the archipelago.

The ratios of aragonite, Mg-high and Mg-low calcite and silicates vary greatly within the area and are indicative of the variation in the physical dynamics which control the biological diversification therein.


Status: Final
Release Date: 1 September 1985
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180

Kalgoorlie Air Quality investigation

Status: Final
Proponent: Department of Conservation and Environment
Release Date: 1 September 1985
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217

Dunsborough Boat Harbour Proposal

Summary:

The Public Works Department has proposed the construction of a fishing boat harbour at Point Picquet near Dunsborough.

The Authority notes that there is a perceived need for a boat harbour facility in the Geographe Bay area which is felt across a range of potential users. However, the Authority recommends that the proposal should not proceed and recommends a number of initiatives which would ensure that a boating facility is provided on Geographe Bay which will suit the needs of all groups.


Status: Final
Proponent: Public Works Department
Release Date: 1 September 1985
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208

Windy Harbour Draft Management Plan

Summary:

This management plan considers Windy Harbour Reserve, which is Nelson location 12439. Windy Harbour is on the south coast of Western Australia east of Point d'Entrecasteaux and west of the Gardner River. Bearings for the south are 34° 50' latitude and for the east 116° 01' longitude. Windy Harbour is in Manjimup Shire and some 75 kilometres by road from Manjimup and 400 kilometres from Perth.

The Windy Harbour Reserve contains 90.4305 hectares. The boundaries of this reserve were amended in 1984 in order to place the d'Entrecasteaux cliffs within the National Park which is named accordingly.


Status: Final
Release Date: 1 August 1985
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235

Peel-Harvey Estuarine System Study: Report on Mandurah Attitudinal Survey

Summary:

For the past decade, the shallows along the shores of the Peel Inlet and Harvey Estuary, near the town of Mandurah 80 km south of Perth, have been fouled by the accumulation of green algae, which decomposes into an offensive-smelling black ooze. Since 1976, the Western Australian Government has funded a wide range of research programmes aimed at understanding the nature and causes of the algae problem in the Estuary, determining practical management measures likely to improve the condition of the Estuary, and evaluating the proposed measures on a cost/benefit basis.

The research undertaken to date indicates that a combination of management measures (known as the preferred strategy) has the potential to restore the Estuary to a condition where the beaches will be largely free of weed and the water clear for most of the time (Department of Conservation and Environment 1984). The three components of this preferred strategy are:

  • continuation (on a larger scale) of present weed harvesting measures;
  • modification of fertilizer practices by farmers on the coastal plain;
  • construction of a new channel from Harvey Estuary to the ocean to increase the flushing of Estuary water to the sea.

These components represent either expensive or long-term solutions to the algae problem. The effects of the algae problem are not all detrimental; for example, fishery and amateur catches of crabs and prawns appear to be marginally improved by the present unhealthy state of the Inlet and Estuary, while the worst effects tend to be experienced only in certain locations around the shores of the Inlet and Estuary. Thus it is to be expected that local and Perth regional opinions could differ as to the need for, and timing of, a solution to the algae problem. As the community living in or visiting the Mandurah and Peel Inlet/Harvey Estuary areas has never been asked officially what it thinks about the problem (although many people have given unsolicited opinions), the Department of Conservation and Environment commissioned an attitudinal survey to gauge community opinion on the algae problem and potential solutions to it.

The objectives of the survey were to:

  • determine local (permanent and temporary residents) as well as regional views on the algae problem and what should be done;
  • provide input into an Environmental Review and Management Programme for a major engineering solution; that is dig a new cut to the ocean at the cost of approximately $31 million (1984 estimate);
  • determine the minimum requirement for status of the Inlet and Estuary for professional fishermen, local residents, and daily, weekly and longer-term tourists.

Status: Final
Release Date: 1 August 1985
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206

Hazardous Substances - Legislative and other controls in Western Australia

Summary:

In Western Australia, the control and management of hazardous substances is a complex subject, due to the proliferation of legislation and committees with an involvement in this area.

This booklet has been prepared for those wishing to better understand the subject, and it is hoped that it will prove useful for the media, unions, industry, government and interested members of the community.

C F Porter

Chairman
WA Advisory Committee on Chemicals


Status: Final
Release Date: 1 August 1985
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183

The Water Balance of Lake Joondalup

Summary: The aim of this study was to document the relative importance of rainfall, ground water and evaporation in determining the volume of water in Lake Joondalup.
Status: Final
Release Date: 31 July 1985
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193

Nitrogen fixation in the marine environment: a literature review

Summary: Recent research on the role of fixation of atmospheric nitrogen (N2) in the oceans has centred on the accepted conclusion that nitrogen is the limiting nutrient for growth and productivity of marine plants. Dissolved nutrients are generally in low concentrations in surface waters of the open oceans and in waters adjacent to coral reefs. Although the total combined nitrogen (includes NH4, NO3, NO2 and urea) in the oceans exceeds the requirements of phytoplankton alone by a factor of about 100, most total combined nitrogen is contained in deep waters far below the photic zone.
Status: Final
Release Date: 31 July 1985
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200

Mindarie Keys

Summary:

Mindarie Keys is a proposal by the Smith Corporation Pty. Ltd. to develop a major urban cell focussed on an artificial harbour and marina on some 316 ha of land immediately south of the Quinns Rocks townsite.

Stage 1 of the project includes excavation of the harbour with development of commercial, recreational and marina facilities and about 100 residential lots. This is planned for completion before the defence of the America's Cup in the summer of 1986-87.

An Environmental Review and Management Programme was prepared by the proponerit under guidelines issued by the EPA and subsequently released for an eight-week public review period which ended on 7 June 1985. T

The EPA has assessed the environmental aspects of the project from the ERMP, public and Government agency comments on the ERMP, the proponent's response to those comments and the Authority's own investigations.

The Authority has considered that, with the exception of losses to the marine environment and consequential effect on commercial fisheries in the area, other impacts on the environment are manageable. However, it considers that the potential impact on the marine environment is in itself insufficient to recommend against the project proceeding.


Status: Final
Proponent: Smith Corporation Pty Ltd
Release Date: 31 July 1985
No Appeals
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210

Wesminco Oil Pty Ltd WA-149-P Offshore oil production

Summary:

Wesminco Oil Pty Ltd as operator of WA-149-P has defined three small offshore oilfields, Chervil, North Herald and South Pepper, between Onslow and Barrow Island. Recoverable oil reserves are estimated at 1.7 million kl.

The Authority considered a Notice of Intent on the project in January 1984 and recommended preparation of an Environmental Review and Management Programme. The ERMP was released for public comment in February 1985 with a six week review period.

In addition to the Wesminco fields, the Harriet oil field has been defined by Bond Oil Pty Ltd north east of Barrow Island. It is likely that further small oil fields will be developed in the future.


Status: Final
Proponent: Wesminco Oil Pty Ltd
Release Date: 1 July 1985
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209

Water and phosphorus transport processes in permeable grey sands at Talbot's site near Harvey, Western Australia

Summary:

Eutrophication of the Peel-Harvey Estuarine System in Western Australia has been strongly associated with the leaching of phosphorus from the catchment soils into the rivers and drains entering the system (Birch, 1982). High phosphorus loads in drainage water are due primarily to extensive agricultural development of permeable sandy soils, with low phosphorus adsorption capacity, in areas of high winter rainfall; and to the long term application of fertilizer in which a high proportion of the phosphate is in a water soluble form.

One means of contributing to the control of the eutrophication problem is to significantly reduce the amount of phosphorus leaching from soils into drainage. A reduction in the flow-weighted mean concentration of phosphorus in drainage would reduce the frequency and magnitude of algal blooms currently occurring in the Estuary provided the phosphorus released from estuarine sediments is not excessive.

Research into methods of reducing phosphorus leaching has focused primarily in two areas:

  1. the development of alternative fertilizer sources containing a lower portion of water soluble phosphorus in association with a comprehensive fertilizer management programme on the coastal plain;
  2. an intensive investigation of phosphorus transport processes within the soils of the Estuary catchment.

This report concentrates on the second area of research and describes progress made at one field research site.


Status: Final
Release Date: 1 July 1985
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207

Towards a State Conservation Strategy: 1. Planning to meet climatic changes

Summary:

As part of the process of preparing a definitive State Conservation Strategy for Western Australia, a wide range of subjects concerning our environment, natural resource usage and society's impacts are being considered. While some facets have been reviewed adequately in recent years to enable highlights to be summarised, others require reviewing to present necessary background information. These reviews do not constitute formal sections of a State Conservation Strategy, but rather are aimed at providing those having a concern for our future, with important source material.

The potential for increasing atmospheric carbon dioxide to affect world climate has been the subject of a number of recent reviews. However, as these have been concerned with larger scale effects (global or national), a need was felt to relate the processes to local impacts.


Status: Final
Release Date: 1 July 1985
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212

The derivation of threshold mean concentrations of copper and zinc in seawater to protect the edible tropical rock oyster, Saccostrea cuccullata, from exceeding the health (food) standards

Summary: Threshold mean concentrations in seawater for copper and zinc (0.004 mg/L, and 0.0127 mg/L respectively) have been derived to protect the edible oyster Saccostrea cuccullata from exceeding the NHMRC food standards of 70 and 1000 mg/kg wet weight respectively. The derivation took into account oyster size, water quality, seasonal factors and problems with analytical methodology. The wet to dry weight conversion factor of 3.8 (CV = 21.4%) was independent of both season and oyster size.
Status: Final
Proponent: Department of Conservation and Environment
Release Date: 1 July 1985
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201

Sampling variability of phosphorous into soils of the Swan Coastal Plain WA

Status: Final
Proponent: Department of Conservation and Environment
Release Date: 1 July 1985
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197

Review of Literature concerning Blue-Green Algae of the Genus Trichodesmium

Summary: This review is part of a major study being undertaken by the Department of Conservation and Environment, of primary production in the tropical, coastal marine communities of the Dampier Archipelago (20°40'S; 116°40'E).
Status: Final
Release Date: 1 July 1985
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204

Proceedings from the Coastal Planning and Management seminar, Perth 19-21 November 1984

Summary:

This Bulletin contains the papers, edited discussion and summaries from the public seminar on Coastal Planning and Management held between the 19th and 21st November, 1984.

The seminar was held at a time when promotion by the State Government of the shoreline and its islands as a major tourist resource is adding further pressure to the existing need for sound planning and management of the coastal zone. The defence of the America's Cup in particular has focussed attention on development of marinas and high rise hotels on the waterfront.

Almost everyone involved in coastal issues recognises that planning, development and management of the coast is complex because many different skills are involved, and that mistakes are costly both in financial and environmental terms.

Many of our current coastal problems can be seen, in the light of hindsight, to be mistakes due largely to a lack of understanding at the time about the character and nature of the coast. Greater knowledge of the coast and coastal processes can enable us to make better decisions based on facts. Unfortunately despite this knowledge, decisions based on short term expediency, that will add new, and perpetuate old, problems are still being made.

'Ad hoc' decision making which only partly recognises environmental limitations and natural processes, has in many cases led to environmental degradation and sometimes to the need for engineering works to achieve short-term relief to offset long-term natural processes.

To avoid perpetuation of this situation the process of coastal planning and development requires continual review.

This seminar was the eighth to be organised by the Department of Conservation and Environment. Earlier seminars in Perth and major coastal centres, concentrated on basic coastal processes and examined local management issues.

This seminar built upon and extended this basic knowledge and examined the next logical step in coastal planning and management. the preparation and implementation of Coastal Management Plans.

The seminar was therefore aimed at highlighting the character of the coast; the different approaches to its planning, development and management; and the role and responsibilities of the various parties involved.

Through this seminar, the Department of Conservation and Environment also hoped that local authorities and developers would see the need for, and desirability of 'Coastal Management Planning' as a cost effective tool in guiding utilisation of the coast while minimising potential environmental and financial costs.


Status: Final
Release Date: 1 July 1985
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195

Peel-Harvey Estuarine System Study: Management of the Estuary

Summary: Proceedings of a Symposium held at the University of Western Australia, 19 and 20 February 1985
Status: Final
Release Date: 1 July 1985
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175

Main Roads Dept WA Perth to Darwin National Highway Newman to White Springs

Status: Final
Release Date: 1 July 1985
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211

Bond Oil Pty Ltd Harriet Oilfield Development

Summary:

Bond Oil Pty. Ltd., as operator of WA-192-P ,has defined an offshore oil field north east of Barrow Island with recoverable oil reserves estimated at 1.6 to 1.9 million m3. The company prepared a detailed Notice of Intent after the Authority requested the document from the previous operators, Australian Occidental Pty. Ltd.

In addition to the Harriet Oilfield, potentially economic oil has been encountered in wells between Barrow Island and Onslow in Wesminco's North Herald, South Pepper and Chervil fields. The Wesminco proposals are the subject of an ERMP (Maunsell and Partners, 1985). It is likely that further small oil fields will be developed in the future.

The project would involve the production of crude oil at an offshore platform located approximately 5 km northeast of the Lowendal Islands and piping stabilised oil via a subsea pipeline to a suitable storage and tanker loading point.


Status: Final
Proponent: Bond Oil Pty Ltd
Release Date: 1 July 1985
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198

Proposed transmission line interconnections for the aluminium smelter

Summary:

The SECWA has proposed the construction and operation of two 330 kV overhead transmission lines with associated facilities to supply the proposed aluminium smelter at Kemerton, north of Australind, from the existing integrated power grid.

The project is of course dependent upon the aluminium smelter project proceeding.

The Environmental Protection Authority has assessed the proposal following the preparation and public release of a Public Environmental Report prepared by the SECWA.

The Authority has concluded that the project is acceptable environmentally in general terms and recommends accordingly.


Status: Final
Proponent: State Energy Commission of Western Australia
Release Date: 30 June 1985
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181

Hazardous chemicals bibliography

Summary:

The Toxic Substances Legislation Sub-Committee of the Western Australian Advisory Committee on Chemicals was established in April 1984 to undertake a comprehensive review of chemicals legislation in Western Australia, and make recommendations for legislation where inadequacies are determined.

The compilation of this bibliography was initially undertaken to provide the Toxic Substances Legislation Sub-Committee with a source of information which would assist in its work. The value of such a bibliography for the wider community was soon recognised and this has resulted in the publishing of this bulletin.


Status: Final
Release Date: 30 June 1985
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203

Dispersion modelling of a proposed aluminium smelter at Kemerton, Western Australia

Summary:

On 2 August 1984, the members of the International Aluminium Consortium of Western Australia, agreed to jointly investigate the possibilty of establishing a 230 000 tonnes/year primary aluminium smelter proposed for the South West of Western Australia. In accordance with the requirements of the Environmental Protection Act 1971-1980 (Western Australia), the Consortium subsequently commissioned Frans Helleman & Associates to prepare an Environmental Review and Management Programme (ERMP) to describe the proposal in detail and assess its environmental impact. Following agreement on content and form, guidelines for the preparation of an ERMP were fowarded to the Consortium.

As a part of the requested content of the ERMP, it was necessary to give details of the dispersion characterisics of particulate and gaseous fluoride along with other gaseous by-products, which would be emitted from the proposed smelter. Due to their relatively high toxicity to vegetation, the gaseous fluoride compounds were of greatest importance. During the preparation of the ERMP, the consultants engaged for this task had discussions with officers from the Department of Conservation and Environment (DCE) concerning the appropriate meteorological data set to use for modelling. On 5 March the ERMP was released for public comment.

The preferred site, enclosing 400 hectares of land, was identified by the Consortium as "Kemerton", which lies 16 kilometres north of Bunbury in the South West of Western Australia.

This document has been prepared by DCE to detail the Department's studies on the atmospheric dispersion of emissions from the proposed smelter. Some of the information presented is designed to enhance the descriptions within the ERMP in this area, whilst other aspects of this document assess dispersion modelling assumptions used, with the aim of producing the best predictions of ambient concentrations given current data availability and knowledge.


Status: Final
Release Date: 30 June 1985
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225

Proposed upgraded ilmenite project at Capel Western Australia

Summary: Following its assessment of the Public Environmental Report (PER) for the proposed upgraded ilmenite project at Capel by Westralian Sands Limited (WSL), the EPA concluded, in its report of June 1985 (Bulletin 225), that the project was likely to have unacceptable environmental impacts on the ground and surface waters around Capel. In response to further information supplied by WSL, the Department of Public Works and the Government Chemical Laboratories, the EPA prepared an addendum which concluded that the major objections to the project had been overcome. This is dependent upon the Company strictly following the commitments given in the PER and its subsequent submissions. The EPA's report and addendum are presented herein.
Status: Final
Proponent: Westralian Sands Ltd
Release Date: 1 June 1985
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214

Proposed aluminium smelter - Kemerton

Summary:

The preparation of this Assessment Report was concluded in June 1985, and was based on the information available to the Authority at that date.

Prior to presentation of this Assessment Report to the Minister for the Environment, the Western Australian Government announced that the proposed aluminium smelter at Kemerton would not be proceeded with at this time. The Authority has completed its assessment of this proposal despite this announcement, in the belief that its advice will be of assistance to Government in the event that a smelter is again proposed. In view of the rapid change in technology and in the light of information obtained in the future, through programmes such as the proponent-funded Authority studies, the Authority considers it prudent to indicate that this assessment should not be considered to be operative for more than five years.


Status: Final
Proponent: International Aluminium Consortium of Western Australia
Release Date: 1 June 1985
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192

Bungle Bungle Working Group

Summary:

This work represents the Bungle Bungle Working Group's final report to the Environment Protection Authority.lt follows the release, in October 1984, of the Working Group's "Draft Report to the Environmental Protection Authority" for a period of public comment.

The draft report attracted a total of 49 submissions from individuals, various groups and organisations, private industry and State and Commonwealth Government Departments. While the majority of submissions originated from metropolitan Perth, submissions were received from throughout Western Australia and from people in New South Wales, Victoria, Tasmania, the A.C.T. and the Northern Territory.

The comments made in the submissions were compiled and collated by the Department of Conservation and Environment. This information was considered by the Working Group and formed the basis for its review of the draft report, which led to the preparation of this revised report, the Working Group's final report to the EPA. The review of public submissions is available as a separate DCE Bulletin.

The Working Group's recommendations, contained in this report, have now been endorsed by the Environmental Protection Authority and forwarded to the Hon. Minister for the Environment, for consideration by Government.


Status: Final
Proponent: Department of Conservation and Environment
Release Date: 31 May 1985
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194

Avon Valley (Toodyay) quarry development

Summary: The proposal to establish the Avon Valley (Toodyay) hard rock quarry arose from protracted negotiations involving a number of parties (including the Environmental Protection Authority) concerning the existing Westrail quarry at Chris Hill within the Avon Valley National Park.
Status: Final
Proponent: Western Quarries Pty Ltd
Release Date: 31 May 1985
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196

Proposed Sorrento Boat Harbour

Summary:

To cater for spectator craft associated with the defence of the America's Cup in early 1987 as well as providing longer term facilities for local and regional recreational boat owners, the Public Works Department has proposed the construction of a 1000 berth small boat harbour at Sorrento.

An Environmental Review and Management Programme (ERMP) was prepared by the Public Works Department at the request of the EPA. The document was released for public comment for eight weeks and submissions received have been included in the Authority's assessment of the environmental aspects of the proposal.


Status: Final
Proponent: Public Works Department
Release Date: 1 May 1985
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189

Draft Coastal Management Plan for Shire of Greenough

Summary:

Section 1 of this report introduces coastal planning and management in the Greenough Shire by establishing the background, scope and aims of the report.

Section 2 identifies and describes the natural and human resources of the Greenough coastline, including aspects of the physical environment, climate, coastal processes, flora and fauna, marine life, human occupance and man-made facilities. This section ends with a summary of the resources and constraints of the Gre·enough environment.

Section 3 outlines the various ways that these resources are currently used or may be used in the future.

Existing tenure, zoning and management of the study area is outlined briefly in section 4, and this is followed by a review of the general principles of coastal management and their significance to the Greenough coastline, in section 5 of the report. The study area is broken down into landscape systems which allows a more detailed description of the characteristics and limitations of the coastline. Section 5 also recommends policies and objectives for the coast to:

  • limit use of coastal areas to activities requiring coastal locations;
  • encourage and plan for appropriate uses of the coastal zone;
  • protect natural systems and cultural assets.

Specific coastal management issues are then discussed in section 6 and these are accompanied by recommendations where appropriate.

Finally, section 7 describes how the plan may be implemented, identifying possible sources of funding, approaches to land vesting and tenure, methods of policing, the need for public education and involvement, and government agencies which may provide assistance.


Status: Final
Release Date: 1 May 1985
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190

A Numerical Hydrodynamic Model Applied to Investigate Tidal Dynamics in the Dampier Archipelago

Status: Final
Release Date: 1 April 1985
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190

A numerical hydrodynamic model applied to tidal dynamics in the Dampier Archipelago

Summary: This paper introduces a two-dimensional, vertically-integrated, finite-difference, hydrodynamic model which simulates water movements on continental shelves, in nearshore waters, coastal inlets and embayments. The model provides spatial and temporal information on the variations of water level and depth-averaged currents which result from tidal, wind or regional forcing acting on areas of known bathymetry.
Status: Final
Release Date: 1 April 1985
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191

The availability of phosphorus to Nodularia blooms in the Peel Harvey Estuary

Summary: Nodularia counts and cellular phosphorus concentrations were monitored from 1981 to 1985 in the Peel-Harvey Estuary. In the Harvey Estuary, the mean cellular phosphorus concentration and the maximum observed Nodularia count increased each year but thera was no correlation between annual river phosphorus input and the size of the following Nodularia bloom. Since external phosphorus input was minimal during Nodularia blooms, most of the phosphorus contained in the blooms was derived from sediment phosphorus release and recycling. The increased tonnage of phosphorus in Nodularia suggests that the sediment store is becoming enriched with phosphorus since the largest Nodularia bloom (1984-85) followed the lowest annual river P input. The increase in Nodularia cellular phosphorus concentrations from each bloom indicates that phosphorus is now less limiting. Although cellular phosphorus concentrations from the 1984-85 Peel Inlet bloom indicated adequate phosphorus nutrition, a large biomass did not occur. This suggests that Nodularia populations in the Peel Inlet are being limited by something other than phosphorus.
Status: Final
Release Date: 31 March 1985
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223

Summary of anemometer data from Australind, Harrow, Brunswick Junction, Glen Iris, and Wellesley Road

Status: Final
Release Date: 1 March 1985
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188

Peel Harvey estuary catchment studies - groundwater investigations

Summary:

Assessment of the first two years of data collected from the experimental Talbot's farm site has given detailed insight into defining and quantifying the major processes of subsurface water movement and its contribution to surface water runoff.

Results of the monitoring programme have yielded estimates of groundwater storage increases of about 300 mm over the 1983 winter period compared to measured rainfall of about 470 mm.

Groundwater level increases resulted in flooding in much of the low lying Joel soil and swamp soil areas of the site. This was seen to result in surface flow and groundwater flow to the shallow drains discharging from the lower areas.

Hydraulic testing of the groundwater systems at two sites within the Bassendean association was undertaken during 1984. Results from this indicated that the deeper aquifer below the coffee rock had high transmissivity and the potential to transport large amounts of water (and phosphorus) to sink areas. Pumping however, could not induce any leakage of shallow groundwater (containing the phosphorus) through the coffee rock.

Assessment of groundwater phosphorus concentrations has enabled determination of the spatial distribution, and the time variation in phosphorus storage within the saturated soils.


Status: Final
Release Date: 1 March 1985
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187

Shire of Roebourne

Status: Final
Release Date: 1 February 1985
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182

Nutrient loadings into the Peel-Harvey Estuary from the Harvey Murray Serpentine Rivers

Status: Final
Release Date: 1 January 1985
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222

Kalgoorlie Air Quality Investigation: Analysis of sulphur dioxide concentration statistics July 82 - Sept 84

Status: Final
Release Date: 1 January 1985
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184

Environmental assessment of road works - Guidelines for local authorities

Summary:

The objectives of these guidelines are to:-

  • Create an awareness of the effects that road projects may have on the environment.
  • Enable Local Authority (LA) officers to assess the effects of individual projects.
  • Enable the negative effects to be minimised and the positive effects to be maximised.

Road reserves in this State contain a valuable store of plants and wildlife. This particularly applies to the less developed roads under the control of rural LAs. It is, therefore, important for the effect on the enviroment to be assessed for smaller roadworks, as well as for major projects.


Status: Final
Release Date: 31 December 1984
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185

Draft Coastal Management Plan - Town of Geraldton

Summary:

In June 1983 the Department of Lands and Surveys received a request from the Town of Geraldton to have the foreshore areas within the town vested in Council. That request was accepted on the basis that Council accept responsibility for management as prescribed by the Department of Conservation and Environment (DCE).

Council agreed to this and on 27 February 1984 the Department of Lands and Surveys asked the DCE to prepare a Coastal Management Plan for the coastal area within the jurisdiction of the Town of Geraldton. In April 1984 the DCE commenced to gather information to prepare a Coastal Management Plan for Geraldton, in consultation with the Town Council and various government bodies and groups with interests in Geraldton's coastal zone.


Status: Final
Proponent: Town of Geraldton
Release Date: 30 November 1984
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167

Jerramungup Shire District - Draft Coastal Management Plan

Status: Final
Release Date: 1 November 1984
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