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CORBET QUARRY

ENVIRONMENTAL MANAGEMENT PLAN Prepared for: Corbet Quarries Pty Ltd Date: November 2016

File Ref: 1948.610.001

Corbet Quarry Environmental Management Plan

Document Control

November 2016 / file ref. 1948_610_001 GROUNDWORK p l u s

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Project/ Report Details

Document Title: Environmental Management Plan

Principal Author: David Doolan

Client: Corbet Quarries Pty Ltd

Ref. No. 1948.610.001

Document Status

Issue Description Date Author Reviewer

0 First version November 2016 David Doolan Jim Lawler

Distribution Record

Recipient Delivery method

Corbets Quarries Pty Ltd 1e

Groundwork Plus ABN: 13 609 422 791

Copyright © These materials or parts of them may not be reproduced in any form, by any method, for any purpose except with written permission from Groundwork Plus.

Queensland 6 Mayneview Street, Milton Qld 4064 PO Box 1779, Milton BC, Qld 4064

P: +61 7 3871 0411 F: +61 7 3367 3317

South Australia 2/1 First Street, Nuriootpa SA 5355 PO Box 854, Nuriootpa SA 5355

P: +61 8 8562 4158

E: [email protected]


Table of Contents


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1. Introduction ......................................................................................................................................................... 1

1.1 Background ........................................................................................................................................................... 1

1.2 Purpose of EMP .................................................................................................................................................... 1

1.3 Relevant Legislation .............................................................................................................................................. 1

2. Project Description ............................................................................................................................................. 2

2.1 Site Details ............................................................................................................................................................ 2

2.2 Project Overview ................................................................................................................................................... 2

2.3 Hours of Operation ................................................................................................................................................ 3

2.4 Potential Environmental Impacts ........................................................................................................................... 3

2.5 Staff Training ......................................................................................................................................................... 4

2.6 Communication...................................................................................................................................................... 4

2.7 Record Keeping ..................................................................................................................................................... 5

2.8 Incidents and Complaints Procedure ..................................................................................................................... 5

2.8.1 Overview ........................................................................................................................................................... 5 2.8.2 Complaint Recording ......................................................................................................................................... 5 2.8.3 Initial Notification ............................................................................................................................................... 5 2.8.4 Investigation ...................................................................................................................................................... 5 2.8.5 Reporting........................................................................................................................................................... 6

2.9 Monitoring .............................................................................................................................................................. 6

2.10 Periodic Review of Environmental Performance and Continual Improvement ...................................................... 6

3. Environmental Management Plans .................................................................................................................... 7

3.1 Stormwater Management Plan .............................................................................................................................. 7

3.2 Air Quality Management Plan .............................................................................................................................. 14

3.3 Noise Management Plan ..................................................................................................................................... 18

3.4 Blasting Management Plan .................................................................................................................................. 19

3.5 Hydrocarbons and Chemical Management Plan ................................................................................................. 23

3.6 Waste Management Plan .................................................................................................................................... 26

3.7 Land Management Plan ...................................................................................................................................... 30

TABLES Table 1 – Identification of Environmental Values and Potential Impacts................................................................................. 3 Table 2 – Surface Water Release Limits ................................................................................................................................. 7 Table 3 – Monitoring and Maintenance of Stormwater Control Devices ............................................................................... 11 Table 4 – Air Quality Parameters .......................................................................................................................................... 14 Table 5 – Blasting Noise Limits ............................................................................................................................................. 22 Table 6 – Maintenance Schedule for Revegetation Works ................................................................................................... 33 DIAGRAMS Diagram 1 – Conceptual On-site Extraction Operations ......................................................................................................... 2 Diagram 2 – Incidents and Complaints Procedure Summary ................................................................................................. 5


Table of Contents


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FIGURES

Figure 1 Developed Catchment Plan (Drawing No. 1948.DRG.020r1) ATTACHMENTS

Attachment 1 Initial Notification Form Attachment 2 Further Notification Form Attachment 3 Sediment Basin Volume Calculations Attachment 4 Spill Response Protocol



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1. Introduction

1.1 Background

This Environmental Management Plan (EMP) has been prepared for Corbet Quarries Pty Ltd (Corbet Quarries) for extractive industry operations carried out over land at 1944 Bruce Highway Traveston Queensland, 4570 and properly described as Lot 520 SP263809 (the Site). The operation includes the following Prescribed Environmentally Relevant Activity (ERA) thresholds in accordance with the Environmental Protection Regulation 2008 (EP Reg):

ERA 16(2)(b) Extracting, other than by dredging, in a year, the following quantity of material – more than 100,000 tonnes but not more than 1,000,000 tonnes.

ERA 16(3)(b) Screening, in a year, the following quantity of material – more than 100,000 tonnes but not more than 1,000,000 tonnes.

The ERAs will be carried out under a Development Approval (DA) for the activity, issued by Gympie Regional Council (Council), as well as an Environmental Authority (EA) issued by the Department of Environment and Heritage Protection (EHP).

1.2 Purpose of EMP

The EMP has been prepared with reference to the Model operating conditions—ERA 16—Extractive and screening activities (Model Operating Conditions) (EHP, 2016). The EMP meets the requirements of Model Operating Condition G9, which states that the activity must be undertaken in accordance with written procedures that achieve the following:

1. Identify potential risks to the environment from the activity during routine operations, closure and an emergency

2. Establish and maintain control measures that minimise the potential for environmental harm 3. Ensure plant, equipment and measures are maintained in a proper and effective condition 4. Ensure plant, equipment and measures are operated in a proper and effective manner 5. Ensure that staff are trained and aware of their obligations under the environmental protection act 1994

(EP Act) 6. Ensure that reviews of environmental performance are undertaken at least annually.

1.3 Relevant Legislation

In Queensland, the Environmental Protection Act 1994 (EP Act) is the principal legislation for protecting the environment. The object of the EP Act is to:

Protect Queensland’s environment while allowing for development that improves the total quality of life, both now and in the future, in a way that maintains the ecological processes on which life depends (ecologically sustainable development).

The EP Act imposes a General Environmental Duty on corporations, government departments and individuals, in order to meet the primary objective (s319 of the EP Act). The duty relates to the notion that everyone must take all reasonable and practicable measures to prevent or minimise environmental harm. In addition, the EP Act states that it is an offence to cause environmental nuisance (s440 of EP Act), material environmental harm (s438 of EP Act), serious environmental harm (s437 of EP Act), and it is an offence to contravene a condition of an Environmental Authority (s430 of EP Act). Schedule 2 of the EP Reg lists prescribed ERAs, for which the relevant ERAs are as listed in Section 1.1 of this document.



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2. Project Description

2.1 Site Details

The activity will be carried out at the site location which is summarised below:

Location: 1944 Bruce Highway, Traveston QLD 4570

Access: Via the Bruce Highway

Real Property Description: Lot 520 SP263809

Local Government Area: Gympie Regional Council

Zoning: Rural Zone

Site Area: 67.49ha

2.2 Project Overview

The operations propose to use typical quarrying methodologies that involve clearing, topsoil and overburden stripping, drill and blast, extraction, processing and stockpiling by mechanical means, crushing and screening plant with the final products sold for use in the construction industry, refer to Diagram 1 – Conceptual On-site Extraction Operations for an illustration of on-site extraction activities.

Excavator

Material loaded into trucks

Particulate emissions

Contaminated water

Noise emissions

Possible Emissions

Load raw material

Delivery of sales off site

Screening and crushing plant

Stockpiles

Screened material stockpiled

Topsoil Stripping

Bull dozer

Delivery Trucks

Front Loader

Front Loader

or

orTopsoil Stockpile

Bull dozer with ripper

Excavator

Blasting Drill Rig

Dump Truck

or

Diagram 1 – Conceptual On-site Extraction Operations

Project operations are anticipated to comprise of the following basic elements:

Clearing of vegetation and stripping of topsoil and overburden material via mechanical means (i.e. bulldozer or excavator). Stockpiling topsoil and overburden for later use as; saleable general fill, utilisation in production of processed material, incorporation into on-site rehabilitation works where required, or use in construction of stormwater controls (e.g. perimeter banks, bunds).



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Drilling and blasting the exposed underlying rock from the developed quarry benches to reduce the material into a manageable size for relocation of the materials to the quarry pit or bench below, ready for transfer to the processing area.

Transferring raw material from the quarry face or pit floor to the designated crushing and screening plant / stockpile hardstand area using an off highway haul truck(s) loaded by an excavator or front-end loader.

Crushing and screening the raw material using a crushing and screening processing plant.

Stockpiling the final products using a front-end loader and / or off-road haul truck within designated stockpiling area(s) before the material is sold and loaded into road trucks for transportation off-site for use.

Rehabilitating disturbed areas progressively once extraction is completed where practicable. A range of quarry products will be produced on-site for markets such as the road building, infrastructure and development industry. Blasting will typically occur on an ‘as needs’ basis and will be dependent upon the market demand and production requirements for the Site. Explosives will not be stored on-site, but will be transported onto site for immediate use as required by a blasting contractor. Unsealed internal access roads will be utilised to facilitate the movement of personnel, plant, equipment, and light vehicles into and out of the Site. Unauthorised vehicle access will be prevented by the use of a wire perimeter fence and clearly displayed signage at the access road entrance.

2.3 Hours of Operation

The hours of operation for the quarry will be as follows:

All other operations – 6am to 7pm Monday to Friday, and 7am to 1pm Saturday. No operations will occur Sunday or public holidays.

Blasting operations – 9am to 3pm Monday to Friday and 9am to 1pm Saturdays. No blasting operations will occur on public holidays.

2.4 Potential Environmental Impacts

Activities associated with the ERA which have the potential to cause environmental harm and/or nuisance are outlined in Table 1 – Identification of Environmental Values and Potential Impacts.

Table 1 – Identification of Environmental Values and Potential Impacts

Environmental Value

Potential Impacts Source at Activity

Air Emission of dust to air impacting potential environmental nuisance sensitive receptors.

Stripping and stockpiling of topsoil and overburden.

Extraction and handling of materials (e.g. transfer of materials, processing materials, stockpiling of materials).

Vehicle movements on unsealed roads and access tracks.

Noise Noise impacts on nearby environmental nuisance sensitive receptors from the activity.



Vehicle movements on unsealed roads and access tracks.

Plant and equipment use.



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Environmental Value

Potential Impacts Source at Activity

Water Release of potentially contaminated water to the receiving environment.

Changes to the natural surface water flows in the receiving environment due to activities.

Erosion and dispersion of soils as a result of increased disturbance areas and exposed soils.

Release of contaminants to, or physical damage of, nearby waterways.



Overland flows interacting with disturbed areas and voids on the Site.

Waste Improper disposal of wastes (general and regulated waste).

Storage and disposal of residual waste (i.e. general and regulated waste).

Storage of overburden.

Lad Spills of hydrocarbons and fuels causing contamination.

Failure of progressive and/or final rehabilitated landforms.

Handling of chemicals and fuels on-site.

Progressive and/or post-closure implementation and management of the Site rehabilitation.

Weed control.

2.5 Staff Training

All site personnel, including contractors, will be inducted on the environmental management requirements for the Site and informed of the environmental management objectives and specifics of the EMP. Training may include awareness on extraction limits, impact minimisation measures, operational practices, maintenance measures, reporting and individual responsibilities. Site personnel will be made aware of penalties if conditions of approval are breached and reporting requirements for incidents involving environmental nuisance and/or harm in accordance with the relevant environmental legislation. A record of all employee training is to be maintained on-site.

2.6 Communication

Effective communication must take place regarding environmental matters at the Site between operational personnel, management and external stakeholders. Internal communication mechanisms relating to environmental matters and potential impacts, objectives and targets, training and awareness, complaints and incidents, and suggestions for improvement may include, but shall not be limited to:

Self-assessments and audits

Action requests, memos, noticeboards, etc.

Environmental incident reporting

Environmental compliance monitoring and reporting

Inductions and environmental awareness training

Tool-box talks or verbal advice

Weekly construction meetings

Management reviews

Site meetings. All external communications is to be undertaken by management. External communication mechanisms for environmental matters may include:

Formal and informal correspondence with the administering authorities

Formal correspondence with interest groups

Community complaints and enquiries.



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2.7 Record Keeping

All environmentally relevant documentation, including approvals, corporate policies, procedures, forms, records, and reports required to be kept as per this EMP or conditions of approval shall be available at the approved premises for a period of at least five (5) years, and must be available for inspection by an authorised person.

2.8 Incidents and Complaints Procedure

2.8.1 Overview

The objective of this Incident and Complaints Procedure is to ensure that any incident and/or complaint is reported and investigated, and appropriate action taken. A diagrammatic overview of incidents and complaints reporting procedure is provided in Diagram 2 – Incidents and Complaints Procedure Summary.

Diagram 2 – Incidents and Complaints Procedure Summary

The Quarry Manager will be responsible for ensuring that all employees at the Site are familiar with the procedure for incidents and complaints recording. All complaints received, and/or any employee becoming aware of an incident with actual or potential environmental implications, shall be reported to the Quarry Manager or delegate immediately.

2.8.2 Complaint Recording

The Quarry Manager will liaise with any complainants to discuss the nature of the complaint, to identify possible causes and outline any actions to be taken to prevent recurrence of the incident. For all complaints received, the following information must be recorded:

a) Time, date, name and contact details of the complainant b) Reasons for the complaint c) Any investigations undertaken d) Conclusions formed e) Any actions taken.

This information must be provided to the administering authority or an authorised person upon request.

2.8.3 Initial Notification

When an environmental incident occurs, the Quarry Manager will notify the administering authority via telephone and email within 24 hours of becoming aware of the incident. A standard form for the written notification is attached as Attachment 1 – Initial Notification Form. The contact details of the administering authority are as follows: Department of Environment and Heritage Protection Phone: 1300 130 372 Email: [email protected]

2.8.4 Investigation

All incidents and complaints should be investigated. The investigations should include:

Determining what activities were being carried out at the time of the complaint/incident and any equipment involved.

Identifying whether equipment or activities on-site were the cause of the incident or complaint.

Receiving complaints and

recording incidents

Initial Notification

Investigation Reporting



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Determining what potential actions may be carried out to resolve the matter and/or minimise the likelihood of further impacts.

Corrective action is to be implemented and an assessment conducted to determine what actions are to be taken to remedy the matter and/or prevent a similar incident from occurring. All incidents and complaints recorded and reported are to be maintained for a minimum period of five years. If monitoring is to be undertaken to investigate an incident or complaint, the operator may engage the services of a suitably qualified person to undertake the assessment.

2.8.5 Reporting

A written notice detailing the following information must be provided to the administering authority within 14 days of any initial notification:

a) The name of the operator, including the approval number b) The name and telephone number of a designated contact person c) Quantity and substance released d) Vehicle and registration details e) Persons involved (driver and any others) f) The location and time of the release g) The suspected cause of the release h) A description of the effects of the release i) The results of any sampling performed in relation to the release j) Actions taken to mitigate any environmental harm caused by the release k) Proposed actions to prevent a recurrence of the release.

Further written notification must be provided to the administering authority, refer to Attachment 2 – Further Notification Form. Upon request from the administering authority, a copy of any environmental monitoring undertaken to investigate the incident shall be supplied to the administering authority within 14 days of completion.

2.9 Monitoring

Any monitoring required by a condition of approval or by this EMP must be carried out by a suitably qualified person(s) as defined under the EP Act. All instruments, equipment and measuring devices used for measuring or monitoring in accordance with a condition of approval must be calibrated and appropriately operated and maintained.

2.10 Periodic Review of Environmental Performance and Continual Improvement

The General Manager will review and update this EMP as required to ensure that it meets operational needs and is consistent with the Site’s environmental approval requirements, and legislation and standards. Reviews of environmental performance are to be undertaken at least annually. Reasons for review of the EMP may result from:

Identification of deficiencies or opportunities for improvement

Recommendations from environmental site audits

Changes to operations (e.g. Thresholds, development stage progression)

Changes to legislation. Periodic review of the EMP will ensure continuous improvement of the Site’s environmental performance through adaption of management strategies, to meet the changing needs of the Site.



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3. Environmental Management Plans

3.1 Stormwater Management Plan

Purpose

A Stormwater Management Plan has been prepared to mitigate or reduce the potential environmental impacts resulting from extractive industry activities. Extraction operations that have the potential to impact on surface water runoff include:

Vegetation clearing.

Topsoil stripping.

Overburden removals.

Pit development.

Construction and maintenance of internal roads and hardstands.

Stockpiling of topsoil, raw feed and product.

Spillage during handling of materials.

Use and storage of oils, greases, fuels and other chemicals.

Performance Targets

To ensure contaminants including turbid waters, chemicals, lubricants or fuels are not released from the Site to any waters (other than those specified in relevant release limits).

Stormwater runoff from disturbed areas, generated by (up to and including) a 24 hour storm event with an ARI of 1 in 5 years must be retained on-site, or managed to remove contaminants before release.

An uncontrolled release from site should only occur under exceptional circumstances such as the Site receiving a rainfall event larger than a 24 hour storm event with an ARI of 1 in 5 years.

Water that is controlled released from the Site is to comply with following proposed condition, as detailed below:

The only contaminants to be released to surface waters are treated stormwater runoff waters in accordance with Table 2 - Surface Water Release Limits and the associated monitoring requirements.

Table 2 – Surface Water Release Limits

Release Point Description

GDA94 decimal degrees Quality Characteristic

Limit Limit Type

Monitoring Frequency

Easting Northing

RP1

472497.9551

7086551.8838

pH 6.5 – 8.5

Range Prior to, and during, release of waters form the Site. Daily for consecutive releases.

Suspended Solids

50mg/L Maximum

Associated monitoring requirements

1. Monitoring location and release points must be situated and maintained in accordance with the Developed Catchment Plan Drawing – 1948.DRG.020.

2. Monitoring must be in accordance with the methods prescribed in the current edition of the Department of Environment and Heritage Protection Water Quality Sampling Manual.

3. Samples must be taken using representative samples.



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4. All determinations must employ analytical practical quantification limits sufficiently low enough to enable comparisons to be made against water quality objectives limits relevant to the particular water quality characteristic.

5. Monitoring must be undertaken during a release as per the frequency stated. 6. All monitoring devices must be correctly calibrated and maintained.

The release to waters must not:

1. Have any other properties at a concentration that is capable of causing environmental harm

2. Produce any slick or other visible evidence of oil or grease, nor contain visible floating oil, grease, scum, litter or other visually objectionable matter

Responsibilities The Corbet Quarry, Quarry Manager, or nominated delegate will be primarily responsible for the implementation of this SMP. The Quarry Manager or nominated delegate will be responsible for the auditing of the Site against this SMP to assess compliance of site operations against this management plan. These audits will be undertaken annually.

Strategies/mitigation measures:

Strategies/mitigation measures for the management of surface water runoff and erosion and sediment transport from the Site will be implemented in accordance the relevant approval conditions. Erosion and Sediment Control (ESC) measures for the Site have been provided below for each main consideration when discussing ESC / Stormwater Management. Sediment Basins The new Water Storage Areas have been designed to capture the required stormwater volume resulting from a 24 hour storm event with an ARI of 1 in 5 years which is 189 mm over a 24 hour period. The sediment basin volume calculations have been included for reference (refer Attachment 3 – Sediment Basin Volume Calculations). Management strategies for the Water Storage Areas are included below (but not limited to):

The Water Storage Areas are to be returned to the design volume within 5 days from receiving the design rainfall event.

The Water Storage Areas have been designed to capture sediment up to a depth of 0.5 m within the base of the pit. An indicator marker is to be installed at the base of the pit to identify the level of sediment accumulated.

Sediment is to be removed to return the Water Storage Area to full capacity on a periodic basis or when the sediment level is approaching 0.5 m. This material is to be excavated and managed in line with the management measures detailed in Erosion and Sediment Control (section below).

Do not dispose of sediment in a manner that will create an erosion or pollution hazard.

Inspection of the Water Storage Areas during the following periods:

Quarterly as a minimum

After each rain event, particularly focusing on the entry and exit points, if damage has occurred then make necessary repairs.

Prior to or immediately after periods of sustained shut down (i.e. greater than 30 days).

Clean Water Diversion Drains Particular management requirements for clean water diversion drains are as follows:

The clean water diversion drain is to have greater than 90% vegetation coverage in those areas where rock armouring has not been designated. A combination of rock



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check dams and silt fences will be used along the length of the clean water drain where vegetation cover is less than 90%.

Erosion and Sediment Control Site Management Land-disturbing activities must be undertaken in such a manner that allows all reasonable and practicable measures to be undertaken to:

Allow stormwater to pass through the Site in a controlled manner and at non-erosive flow velocities up to the specified design storm discharge.

Minimise soil erosion resulting from rain, water flow and/or wind.

Minimise adverse effects of sediment runoff, including safety issues.

Prevent, or at least minimise, environmental harm resulting from work-related soil erosion and sediment runoff.

Ensure that the value and use of land/properties adjacent to the development (including roads) are not diminished as a result of the adopted ESC measures.

Land Clearing

Land clearing must be delayed as long as practicable and must be undertaken in conjunction with development of each stage of the quarry.

Tree clearing must occur in a manner that minimises disturbance to existing ground cover (organic or inorganic).

No land clearing shall be undertaken unless preceded by the installation of adequate drainage and sediment control measures, unless such clearing is required for the purpose of installing such measures, in which case, only the minimum clearing required to install such measures shall occur.

All reasonable and practicable measures must be taken to minimise the removal of, or disturbance to, those trees, shrubs and ground covers (organic or inorganic) that are intended to be retained.

All land clearing must be undertaken in accordance with the Federal, State and local government Vegetation Protection/Preservation requirements and/or policies.

Land clearing is limited to the minimum practicable extent during those periods when soil erosion due to wind, rain or surface water is possible.

Site Access

Site exit points must be appropriately managed to minimise the risk of sediment being tracked onto sealed, public roadways.

Stormwater runoff from access roads and stabilised entry/exit points must drain to an appropriate sediment control device.

Topsoil Management

All reasonable and practicable measures must be taken to obtained the maximum benefit from existing topsoil.

Topsoils are to be stripped and stockpiled separately to subsoil materials for use in rehabilitation, as required.

Stockpile Management Stockpiles of erodible material that has the potential to cause environmental harm if displaced, must be:

Adequately protected from wind, rain, concentrated surface flow and excessive upslope stormwater surface flows.



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Located at least 5 m from any hazardous area, retained vegetation or concentrated drainage line.

Located up-slope of an appropriate sediment control system.

A suitable flow diversion system must be established immediately up-slope of a stockpile.

Prior to wet season (September - April) overburden / soil stockpiles should be protected from rain drop impact (e.g. seeded, hydro-mulched, mulch covered, or use of geofabric and / or tarps) and located out of concentrated stormwater flow paths.

Drainage Control

Wherever reasonable and practicable, stormwater runoff entering the Site from external areas, and non-sediment laden (clean) stormwater runoff entering a work area or area of soil disturbance, must be diverted around or through that area in a manner that minimises soil erosion and the contamination of that water for all discharges up to the specified design storm discharge.

All reasonable and practicable measures must be implemented to control flow velocities in such a manner than prevents soil erosion along drainage paths and at the entrance and exit

Wherever reasonable and practicable, “clean” surface waters must be diverted away from sediment control devices and any untreated, sediment-laden waters.

The internal drainage channel shall be constructed with silt traps. Such silt traps shall be cleared at regular intervals.

Quarry and working benches shall be drained to the central drainage channel via channelling which shall have rubble placed in them to minimise the speed of water flow.

Sediment Control

Efforts shall be employed to trap sediment within the Site, and as close as practicable to its source.

Sediment traps must be installed and operated to both collect and retain sediment.

The potential safety risk of proposed sediment control devices to site workers, visitors and the public must be given appropriate consideration, especially those devices located within commonly accessible areas.

All reasonable and practicable measures must be taken to prevent, or at least minimise, the release of sediment from the Site.

Suitable all-weather maintenance access must be provided to all sediment control devices.

Sediment control devices must be de-silted and made fully operational as soon as reasonable and practicable after a sediment-producing event, whether natural or artificial, if the device’s sediment retention capacity falls below 75% of its retention capacity.

Materials, whether liquid or solid, removed from sediment control devices during maintenance or decommissioning, must be disposed of in a manner that does not cause ongoing soil erosion or environmental harm.

Site Maintenance

All erosion and sediment control measures, including drainage control measures, must be maintained in proper working order at all times during their operational lives.

Washing/flushing of sealed roadways must only occur where sweeping has failed to remove sufficient sediment and there is a compelling need to remove the remaining sediment (e.g. for safety reasons). In such circumstances, all reasonable and



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practicable sediment control measures must be used to prevent, or at least minimise, the release of sediment into receiving waters. Only those measures that will not cause safety and property flooding issues shall be employed. Sediment removed from roadways must be disposed of in a lawful manner that does not cause ongoing soil erosion or environmental harm.

Sediment removed from sediment traps and places of sediment deposition must be disposed of in a lawful manner that does not cause ongoing soil erosion or environmental harm.

Maintenance mowing must be done in a manner that will not damage the profile of formed, soft edges, such as the crest of earth embankments.

Monitoring and Maintenance

A summary schedule of the various inspections, performance criteria and responses that shall be performed on site is shown in Table 3 – Monitoring and Maintenance of Stormwater Control Devices.

Table 3 – Monitoring and Maintenance of Stormwater Control Devices

Inspection Minimum Frequency

Performance Criteria

Response

Inspect drainage lines including catch drains, contour drains and diversions

Quarterly, and prior to and following rainfall events

erosion in areas adjacent to water conveyancing structures

eroded areas shall be rip rapped as soon as practicable

overtopping of water conveyancing structures (identified by the scouring of the drain batters perpendicular to the direction of flow)

the drain shall be cleaned of sediments and rip rap replaced to the original design specifications

rehabilitation with grasses in the catchment of the drain may be required to reduce sediment loadings of runoff

Inspect potential sediment storage capacity of grit traps, sediment traps and Water Storage Areas

Quarterly or following major rainfall events

storage capacity maintained at >90%

sediment/grit shall be removed from the structure and used as filling in rehabilitation works

recycle excavation pit water to ensure that adequate free storage is maintained for the collection and holding of runoff

Waste containers

Quarterly waste is stored in appropriate containers

waste receptacles labelled

ensure waste material is stored and disposed of properly



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Spill response stations

Quarterly and following use

equipment is properly maintained

maintain equipment

replace used equipment

Maintenance / refuelling area

Quarterly fuel, oil spills

clean up fuel spills and investigate source

contractor maintenance

maintain contractor maintenance records

fuel storage integrity maintained

investigate and repair potential leaks

Auditing Stormwater management reviews are required to be carried out on periodic bases to assess the implementation of the management strategies.

Identification of Incident or Failure

Non-compliance with agreed performance criteria will be identified by:

Build-up of sediment off the Site

Excessive sediment build-up on the Site

Excessive erosion on the Site

Release of quarry materials from the Site

Poor vegetation establishment

Poorly maintained, damaged or failed ESC devices

Uncontrolled release from site for events less than the design event

Non-compliant water quality being released from site.

Corrective Action After any identification of incident or failure, the source/cause is to be immediately located and the following measures implemented:

Build-up of sediment off the Site – the material must be collected and disposed of in a manner that will not cause ongoing environmental nuisance or harm; then on-site ESC measures amended, where appropriate, to reduce the risk of further sedimentation.

Excessive sediment build-up on the Site – collect and dispose of material, then amend up-slope drainage and/or erosion control measures as appropriate to reduce further occurrence.

Severe or excessive rill erosion – investigate cause, control up-slope water movement, re-profile surface, cover dispersive soils with a minimum 100mm layer of non-dispersive soil, and stabilise with erosion control measures and vegetation as necessary.

Release of construction material from the Site – collected and disposed of in a manner that will not cause ongoing environmental nuisance or harm; then inspect litter and waste receptors.

Poor vegetation growth or soil coverage – plant new vegetation and/or mulch as required.

Sediment control failure – replace and monitor more frequently. Regular failures may mean that the sediment control location, alignment or installation may need to be amended.

Scour / erosion of Water Storage Area bunds will be required to be stabilised.



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If the release of excessive sediment and/or other materials off the Site occurs, or water quality monitoring indicates levels are not within the Water Quality Release, clean up deposition, and inspect all control measures.

Internal Reporting A copy of all incidents and complaints will be stored at the Site within the incident and complaint register.

Notification to EHP Notification to EHP will be required under the following circumstances:

Any event where an uncontrolled release has occurred from site.

Any event where potential environmental harm may have been caused as a result of site activities.

Reporting and Notification is to be undertaken as per conditions of the EA.



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3.2 Air Quality Management Plan

Purpose

This Air Quality Management Plan has been prepared to control potential air quality impacts occurring as a result of land disturbance necessary for the extractive industry operation. The Environmental Protection Act 1994 and the associated Environmental Protection (Air) Policy 2008 provide the legislation and regulatory controls for management of emissions to the atmosphere.

Performance Targets

Dust and particulate monitoring is to be undertaken upon request of the administering authority in accordance with the relevant conditions of the EA. When monitoring is undertaken, dust and particulate matter must not exceed the levels shown in Table 4 – Air Quality Parameters when measured at the sensitive receptor.

Table 4 – Air Quality Parameters

Contaminant Measure Target Upper Limit

Measurement Method

Dust Deposition rate 120 mg/m2/day

AS 3580.10.1 Methods for sampling and analysis of ambient air – Determination of particulates – Deposited matter – Gravimetric method.

PM10 Concentration 50 µg/m3

averaged over 24 hours

AS 3580.9.6 Determination of Suspended Particulate Matter-PM10 High Volume Sampler with Size Selective Inlet-Gravimetric Method

AS 3580.9.7 Methods for sampling and analysis of ambient air - Determination of suspended particulate matter - Dichotomous sampler (PM10, coarse PM and PM2.5) - Gravimetric method

Any alternative method of monitoring PM10 which may be permitted by the Air Quality Sampling Manual as published from time to time by the administering authority.

PM2.5 Concentration 25 µg/m3 averaged over 24 hours

AS3580.9.10 Ambient air – Determination of suspended particulate matter – PM2.5 low volume sampler – Gravimetric method

AS 3580.9.7 Methods for sampling and analysis of ambient air - Determination of suspended particulate matter - Dichotomous sampler (PM10, coarse PM and PM2.5) - Gravimetric method

Any alternative method of monitoring PM10 which may be permitted by the Air Quality Sampling Manual as published from time to time by the administering authority.



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Strategies/mitigation measures

Strategies/mitigation measures for the management of dust emissions from the Site will be implemented in accordance with the relevant conditions of development and may include the following:

Disturbed Areas

Dampen down cleared areas, extraction working areas, haul roads, stockpiles and other hardstand areas by water spraying when visual surveillance indicates excessive dust generation and propagation from point or mobile sources.

Limit clearing, topsoil and overburden removal at any one time to that necessary whilst providing for effective production of the resource.

Monitor meteorological conditions to time potential dust generating activities with favourable weather conditions.

Restrict vehicle and mobile machinery movements to designated routes and standing areas to the extent practicable.

Install water sprays or dry dust collection systems at all major dust sources, where practicable.

Engage a water truck/cart to dampen access roads.

Processing Plant

Dampen down work areas.

Use water sprays and/or dust collection systems at transfer points, where practicable.

Use shielding and/or windbreaks where possible.

Maintain vehicles and equipment in accordance with the original equipment manufacturers’ specifications.

Stockpiles

Use water sprays as required during winds likely to generate dust releases.

Stabilise and revegetate topsoil and overburden stockpiles where possible.

Use dust suppressants and shielding/wind breaks/screens where possible.

Limit the height and slope of stockpiles.

Locate stockpiles in bunkers where practicable.

Trafficable Areas

Enforce a maximum speed of 40 km/hr on unsealed haul and internal roads.

Keep trafficable areas as clean as possible.

Dampen down trafficable areas using water sprays and/or dust suppressants.

Maintain road surfaces in good condition and with suitable grades.

Material Transport and Transport Vehicles

Ensure loads are appropriately contained and covered prior to leaving the Site.

Dampen down the load prior to transport where necessary.

Clear spillages from side rails, tailgates and draw bars of trucks (following loading and tipping).

Level loads prior to truck exit from the Site (e.g. via rumble pad).

Securely fix tailgates of all material transport vehicles prior to loading to prevent material.



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Rehabilitation

Progressively rehabilitate the Site as areas become available.

Minimise windblown dust during any rehabilitation activities.

Ensure vehicles use established roads and tracks where possible and limit access to any rehabilitated areas.

Note: Water supply for dust suppression is to be sourced from uncontaminated or clean

water from the on-site sedimentation basins and/or any other on-site water source (eg. quarry sump).

Monitoring The controls nominated will require regular monitoring and review to ensure that performance accords with the approval requirements and also reflect the dynamic nature and changing needs of the operation. Daily visual surveillance will be undertaken by all site personnel to ensure dust generation on-site is controlled appropriately. Dust and particulate monitoring will be undertaken at the request of the administering authority in accordance with the relevant conditions of the EA. Dust and particulate monitoring must be undertaken to investigate any complaint of environmental nuisance caused by dust and/or particulate matter, and the results notified within 14 days to the administering authority following completion of monitoring. Monitoring must be carried out at a place(s) relevant to the potentially affected dust sensitive place and at upwind control site and must include:

a) for a complaint alleging dust nuisance, dust deposition b) for a complaint alleging adverse health effects caused by dust the concentration

per cubic metre of particulate matter with an aerodynamic diameter of less than 10 micrometre (pm) (PM10) suspended in the atmosphere over a 24hr averaging time.

Monitoring is to be undertaken by a suitably qualified person in accordance with Australian Standard AS3580.10.1 of 2003 – Determination of particulate matter – Deposited mater – Gravimetric method (or most recent edition). When requested to undertake monitoring, monitoring results are to be provided to the administering authority following completion of the monitoring event.

Contingency Plan In the event air quality monitoring determines an exceedance of the approved limits, the Quarry Manager may engage the services of a suitably qualified person to determine additional management strategies to mitigate impacts. Additional air quality monitoring will be undertaken where necessary to determine the efficacy of the additional management strategies.

Audit and Review: The effectiveness of the Air Quality (Dust) Management Plan shall be reviewed as necessary or at least every three (3) years.

Reporting and Responsibilities:

All complaints relating to dust shall be recorded in the Site’s complaints register.

Quarry Manager or nominated delegate shall investigate complaints and take appropriate actions in accordance with the complaints handling procedure.

Quarry Manager or nominated delegate shall maintain records of any dust monitoring undertaken on site for a minimum of seven (5) years.



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Identification of Incident or Failure to Comply:

Receipt of a public dust complaint.

Visual observation of uncontrolled visible dust being generated on site.

Corrective Action: Quarry Manager or nominated delegate to personally meet with any person making a complaint and shall take appropriate action to resolve issues raised.

Investigate complaints received to identify the source and undertake monitoring to measure the magnitude of the problem and identify possible solutions.

Assess processes to identify any significant changes and if required, modify activities / processes to rectify any identified deficiencies in dust control.

Quarry Manager or nominated delegate may request the services of a specialist consultant to investigate and to give advice on additional dust control measures or undertake dust monitoring.



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3.3 Noise Management Plan

Purpose

This Noise Management Plan has been prepared to control potential nuisance impacts occurring as a result of noise associated with the extractive industry operations.

Performance Targets

Noise from the Site must not cause an environmental nuisance at any nuisance sensitive place or commercial place.

Site operations shall comply with the noise limits specified in the EA. A Noise Survey undertaken by Air Noise Environment Pty Ltd (provided within the Environmental Assessment Report, document 1948.620.001) has prescribed the following performance target for the proposed operation.

Noise Level dB(A)

measured as:

Monday to Saturday Sundays and Public Holidays

7 am to 6 pm

6 pm to 10 pm

10 pm to 7 pm

9 am to 6 pm

6 pm to 10 pm

10 pm to 9 am

LAeq,adj,15mins 45 40 30 45 40 30

LA1,adj,15mins 50 45 35 50 45 35


Strategies/mitigation measures for the management of noise emissions from the Site may include the following:

Operate well-maintained plant, vehicles and equipment, and ensure all plant, vehicles and equipment are serviced in accordance with, or more frequently than, manufacturers’ specifications

Avoid unnecessary revving of engines.

Shut down equipment when not in use.

Ensure that equipment at the Site is used for the intended purpose.

Ensure that any extraneous noises are rectified.

Maintain haul roads and hardstand surfaces in good condition (e.g. free of potholes, rills and product spillages) and with suitable grades.

Avoid the use of compression braking on product delivery trucks in residential areas.

Specific recommendations made following the Noise Survey undertaken by Air Noise Environment Pty Ltd (provided within the Environmental Assessment Report, document 1948.620.001)

Restricting drilling in the quarry to the Day period (7 am – 6 pm).

Restricting any ongoing excavator activities occurring on the western face of the pit during the early morning period (6 am – 7 am) and programming activities in the area for higher ambient noise periods (e.g. morning/afternoon peak traffic periods).

Monitoring The Quarry Manager will ensure regular surveillance of the Site to qualitatively assess noise generation from plant and machinery. The Quarry Manager may initiate a noise survey when requested by the administering authority, or as otherwise deemed necessary, to investigate a noise complaint. Methods for measurements and reporting of noise monitoring must comply with the current edition of the administering authority’s Noise Measurement Manual. Monitoring must include:

LAeq, adj, T

Background noise (Background) as LA 90, adj, T

MaxLpA,T

the level and frequency of occurrence of any impulsive or tonal noise



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3.3 Noise Management Plan

atmospheric conditions including wind speed and direction

effects due to extraneous factors such as traffic noise recording of location, date and time of measurements.

Contingency Plan In the event noise monitoring determines an exceedance of the approved limits, the Quarry Manager may engage the services of a suitably qualified person to determine additional management strategies to mitigate impacts. Additional noise monitoring will be undertaken where necessary to determine the efficacy of the additional management strategies.

Audit and Review: The effectiveness of the Noise Management Plan shall be reviewed as necessary or at least every three (3) years.


Noise complaints received will be recorded in an Incident and Complaints Register, and reported to the Quarry Manager or nominated delegate.

All site personnel will be acquainted with the Noise Management Plan and be responsible for the general surveillance of on site noise control measures.

The noise monitoring and reporting of noise levels will be undertaken by a person or body possessing the qualifications and experience appropriate to perform the required measurements.

Records of any noise monitoring undertaken for the Site shall be maintained at the licensed premises for a minimum of five (5) years.

The Quarry Manager or nominated delegate will be responsible for ensuring that noise suppression equipment is maintained and in good working order.

Quarry Manager or nominated delegate will be responsible for ensuring that equipment at the Site is used for its intended purpose and operated so not to cause unnecessary noise.


Receipt of a public noise complaint.

Corrective Action: Observations of performance of the various components of the Noise Management Plan are to be made and action taken to rectify underperformance that may include:

The Quarry Manager or nominated delegate to personally meet with any person making a complaint and then taking appropriate action to resolve issues raised.

Investigate complaints received to identify the source and undertake monitoring to measure the magnitude of the problem and identify possible solutions.

Undertake appropriate action to reduce the identified noise source and ensure the performance criteria is achieved.

Assess the processes to identify any significant changes and if required, modify activities.

The Quarry Manager or nominated delegate may request the services of a specialist consultant to investigate and to give advice on additional noise control measures or undertake noise monitoring.

3.4 Blasting Management Plan

Purpose

Blasting will be required to fragment rock to a manageable size that can be transported and fed into the on-site crushing and screening plant. Blasting practice has the potential to generate excessive noise and vibration impacts that may cause annoyance and discomfort to surrounding neighbours and in extreme circumstances cause damage to



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buildings, structures and services. Section 440ZB of the Environmental Protection Act 1994 provides the legislation for blasting.

Performance Targets

Blasting activities must not exceed the limits for peak particle velocity and air blast overpressure in Table 5 – Blasting Noise Limits when measured at any sensitive place or commercial place.


The following control measures may be implemented to assist in mitigating potential noise nuisance from blasting associated with the Site activities:

Unless prior approval is obtained from the administering authority, blasting is only permitted during the following hours: - 9:00am to 5:00pm Monday to Friday. - No blasting on Sundays or public holidays.

Handling, transport and use of explosives shall be carried out in accordance with the requirements of Australian Standard 2187, and the Mining and Quarrying Safety and Health Act 1999 (MQSH Act) and associated Regulation.

Only suitably experienced and qualified blasting personnel shall be employed or contracted to provide blasting services.

The maximum instantaneous charge or charge mass per delay will be limited to the lowest possible level.

A blast plan shall be prepared for each blast, containing blast hole layout, initiation sequence, charging, stemming type and height, charge weight and any other design element, required for good blasting practice.

Blast areas may be dampened down prior to blasting to minimise dispersion of dry and fine materials where practicable, or where it is identified as a source of potential dust nuisance.

Monitoring Monitoring of blasting activities must be undertaken in accordance with the administering authority's guideline Noise and Vibration from Blasting and the Noise Measurement Manual and any relevant Australian standard. The Noise and Vibration from Blasting and the Noise Measurement Manual have been adapted from the Australian and New Zealand Environmental Council (ANZECC) Technical Basis for Guidelines to Minimise Annoyance Due to Blasting Overpressure and Ground Vibration (ANZECC, 1990) and requires the following: Outdoor measurement of airblast overpressure

Measurement of airblast overpressure should be taken at an appropriate location that is exposed to the direction of blasting and at least 4m from any noise-affected building or structure or within the boundary of a noise sensitive place, at a position between 1.2m and 1.5 m above the ground. Outdoor measurement of ground vibration

The ground-borne vibration transducer (or array) must be attached to a mass of at least 30kg to ensure good coupling with the ground where the blast site and the measurement site cannot be shown to be on the same underlying strata. The mass shall be buried so that its uppermost surface is at the same level as the ground surface. The ground-borne vibration transducer (or array) must be placed at a distance of at least the longest dimension of the foundations of a noise-affected building or structure away from such building or structure and be positioned between that building or structure and the blasting site.



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Airblast overpressure and ground vibration monitoring

For the purposes of checking compliance with the airblast overpressure conditions and ground vibration conditions and for investigating complaints of noise and vibration annoyance, monitoring must be undertaken and at least the following descriptors, characteristics and conditions determined:

1. maximum instantaneous charge (MIC) in kg 2. location of the blast within the quarry (including which bench level) 3. airblast overpressure level, dB (linear) peak 4. peak particle velocity (mms-1) 5. location, date and time of recording 6. meteorological conditions (including temperature, relative humidity, temperature

gradient, cloud cover, wind speed and direction) 7. distance(s) from the blast site to noise-affected building(s), structure(s) or the

boundary of any noise-sensitive place. Where a nuisance complaint regarding airblast overpressure or ground vibration is received, consideration will be given to available monitoring results and locations, and if required or advantageous, a monitor will be installed at an appropriate location for the next five (5) blasts to assess compliance, or when requested by the administering authority. All monitoring and reporting shall be undertaken by a person or body possessing both the qualifications and the experience appropriate to perform the required measurements.

Contingency Plan: If a blast complaint is received as a result of on-site blasting activities, or upon request from the administering authority, an investigation will be conducted and actions taken to resolve the complaint to the maximum practicable extent. The Quarry Manager may request the services of a specialist consultant to investigate and to give advice on blasting techniques or to audit blasting methods.

Audit and Review: Quarry Manager is to review the effectiveness of the Blasting Management Plan as necessary, after the first year of operation and at least once every three years from there in.


All complaints received at the quarry will be recorded in the complaints register.

Quarry Manager or nominated delegate shall investigate complaints and take actions in accordance with the complaints handling protocol.

Quarry Manager or nominated delegate shall maintain records of blast monitoring results and blast records.

Quarry Manager or nominated delegate shall be responsible to ensure staff and or contractors are aware of procedures for blast control.


Receipt of a blast complaint.

Site operations exceed performance targets.

Corrective Action: Quarry Manager or nominated delegate to personally meet with any person making a complaint and shall take appropriate action to rectify any identified deficiencies in blast control measures.

Quarry Manager or nominated delegate to implement blast monitoring.

Assess processes to identify any significant changes and if required, modify activities / processes.

Quarry Manager or nominated delegate may request the services of a specialist consultant to assist in blast designs to achieve optimal environmental performance.



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Specialist consultants may be requested to investigate and to give advice on blasting techniques or to audit blasting methods if air blast overpressure and/or ground vibration is consistently greater than the nominated Performance Targets.

Table 5 – Blasting Noise Limits

Blasting criteria Blasting limits

Airblast overpressure 115dB (Linear) Peak for 9 out of 10 consecutive blasts initiated and not greater than 120 dB (Linear Peak) at any time.

Ground vibration peak particle velocity 5mm/second peak particle velocity for 9 out of 10 consecutive blasts and not greater than 10 mm/second peak particle at any time.



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3.5 Hydrocarbons and Chemical Management Plan

Purpose

The Hydrocarbons and Chemicals Management Plan has been prepared to control the potential for spills or leaks from chemicals and hydrocarbons associated with the Site activities.

Performance Targets

No land contamination from the extractive industry activity that would require registration on the Environmental Management Register (EMR) or Contaminated Land Register (CLR).

No serious spills of oils, greases, fuels or other hazardous chemicals.

No preventable release of hydrocarbons and chemicals to the environment.


Strategies/mitigation measures for the management of hydrocarbons and chemicals at the Site will be implemented in accordance with the relevant conditions of approval and may include the following:

General

Spills are to be cleaned up immediately. Spillages must not be cleaned up in a way that releases wastes, contaminants or other materials to any stormwater drainage systems, roadside gutters or waters.

Refuelling, equipment maintenance and cleaning of vehicles is to be undertaken within a designated area such as hardstand / sealed capable of capturing and containing contaminants to prevent release to land.

Induct all new employees on the use of handling of chemicals used on-site.

Maintain the chemical and fuel storage areas in a neat and tidy condition.

Use drip pans/ spill trays during refuelling and equipment maintenance.

Material Safety Data Sheets (MSDS) of chemicals used on site shall be kept in a register at the Site office.

Spill Kits

Maintain appropriate spill kits and personal protective equipment at locations known to all employees (e.g. refuelling locations, chemical storage facilities, mobile equipment).

Ensure employees are familiar with, and trained in the use of, proper spill clean-up procedures and maintain a copy of the procedures at the approved place at all times.

Bunding and Storage

All chemical storage facilities on-site must meet specifications of Australian Standard AS 1940 - The storage and handling of flammable and combustible liquids, as a minimum.

Bunding will be constructed of material which is impervious to the material stored and transferred therein.

Bunds will be kept in good condition (e.g. no cracks, gaps or leaks)

Roofed storage facilities are to be provided where possible.

Stormwater captured within bunding is to be removed as soon as practicable and disposed of as contaminated water.

Empty hydrocarbon and chemical containers are to be stored with closures in place on a concrete hardstand or within a bunded area.

A collection sump must be provided in the floor of the bunding to facilitate the removal of liquids.

All pipe work in the bunded area must be directed over the bund wall and not through it.



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Where vehicle access to the bunded area is required, access must be by way of a rollover bund.

Disposal

Hydrocarbon contaminated materials are to be appropriately disposed of at a licensed facility.

If the material is a Regulated Waste (as defined under the legislation) it will be transported and disposed of by a licensed contractor.

Oily waste materials, including liquid hydrocarbons, should be segregated from general wastes for disposal off-site by a licensed contractor.

Records are to be kept on disposal of waste for all regulated waste materials.

Monitoring Areas where handling of hydrocarbons and chemicals occur (e.g. refuelling or minor on-site servicing) shall be regularly inspected by the Quarry Manager. All employees will be responsible for the safe day to day handling, use and temporary storage of chemicals being used on-site.

Contingency Plan In the event of an incident involving hydrocarbons or chemicals, the cause of the incident will be investigated and a review of management practices will be undertaken to determine any potential for improvement to prevent a recurrence of the incident. The spill response protocol included as Attachment 4 – Spill Response Protocol provides general guidance on the actions to be taken in the event of a spill. Remediation of land contamination may be required in the event of more serious incidents, however the operator is to consult with the administering authority and a suitably qualified person to determine the nature and extent of any contamination remediation exercise.

Audit and Review: An audit of the Material Safety Data Sheets (MSDS) of chemicals used on site shall be undertaken by the Quarry Manager or nominated delegate or delegate at least once a year.

The Storage and Handling of Fuels and Chemicals Management Plan for the Site will be reviewed as required or at least every three (3) years.


Records shall be kept on existing inventory, storage location, personnel training and disposal of waste for all hazardous materials used on site.

The Quarry Manager or nominated delegate or delegate shall report results of inspections undertaken.

In the case of an incident, the following information shall be recorded as a minimum, kept and reviewed during site decommissioning:

- date and time of spill - approximate location of the spill - substance spilled - quantity spilled - actions taken to contain and control spill - method of disposal - person responsible for managing and removing the spill

The location, volumes and chemicals involved in major and serious spills shall be reported to the administrating authority.

The Quarry Manager or nominated delegate shall be responsible for ensuring all employees and contractors are aware of the requirement of the Storage and Handling of Fuels and Chemicals Management Plan.

All employees shall be responsible for the safe day to day handling, use and storage of dangerous goods



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The Quarry Manager or nominated delegate shall be responsible for recording the training of all Employees on the procedure for containing and cleaning up of chemical oil and fuel spills, and the handling of other dangerous goods that may be used on Site.


Significant fuel, oil or chemical spill or release to the environment.

Storage areas that do not meet Australian Standards.

Chemicals, fuels and oils not correctly labelled.

Chemicals stored in areas not containing suitable bunding.

Records such as training and MSDS records not being maintained on site.

Corrective Action: Spillage and contamination will be immediately contained and a program designed to remediate any contamination shall be implemented in accordance with the Spill Protocols implemented on site.

Quarry Manager or nominated delegate will assess processes to identify any significant changes and if required, modify activities / processes.

Quarry Manager or nominated delegate or delegate will arrange the repair of bunds, enclosures or collection trays when damaged.



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3.6 Waste Management Plan

Purpose

This Waste Management Plan (WMP) has been prepared with reference to the conditions of approval to ensure wastes produced on-site are appropriately managed. The type of wastes that may be generated at the Site may include, but are not necessary limited to:

regulated wastes (e.g. batteries, oil filters, waste oil/hydrocarbons and containers, oil/water emulsions and tyres)

scrap metal and used or faulty parts and equipment

general waste such as food waste, packaging and consumables

green waste. The amount of waste generated will fluctuate over the life of the operation, therefore a record of wastes generated will be maintained in an on-site inventory. The Waste Reduction and Recycling Act 2011 (WRR Act) nominates a waste management hierarchy in a preferred order of adoption. The hierarchy is as follows: (a) AVOID unnecessary resource consumption

(b) REDUCE waste generation and disposal

(c) RE-USE waste resources without further manufacturing

(d) RECYCLE waste resources to make the same or different products

(e) RECOVER waste resources, including the recovery of energy

(f) TREAT waste before disposal, including reducing the hazardous nature of waste

(g) DISPOSE of waste only if there is no viable alternative.

Performance Targets

Implement the WRR Act waste management hierarchy.

Maintain a record of any disposal of trackable wastes in accordance with the Environmental Protection Regulation 2008.

No unlawful disposal of wastes on or off-site.


Strategies/mitigation measures for the management of waste materials at the Site will be implemented in accordance with the relevant conditions of approval and may include the following:

Waste Avoidance

Waste avoidance relates to preventing the generation of waste or reducing the amount of waste generated. Reasonable and practicable measures for achieving waste avoidance may include, but are not necessarily limited to:

Input substitution (using recyclable materials instead of disposable materials, for example using oil delivered in recyclable steel drums instead of non-recyclable plastic containers).

Increased efficiency in the use of raw materials, energy, water or land (purchasing consumables in bulk (large containers) rather than in small quantities).

Improved maintenance and operation of equipment (keep equipment in good working order to reduce wear and overhaul).

Undertaking an assessment of waste minimisation opportunities from time to time.



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Waste Reuse

Waste re-use refers to re-using waste, without first substantially changing its form. Reasonable and practicable measures for reusing waste may include, but are not necessarily limited to:

Recovering and separating solvents, metals, oil, or components or contaminants and reusing separated solvents for degreasing plant and equipment.

Applying waste processing fines to land in a way that gives agricultural and ecological benefits (using fine sediments in rehabilitation activities).

Using overburden for constructing bunds and landforming.

Reusing silt/sediment on-site to the maximum practicable extent.

Waste Recycling

Waste recycling refers to treating waste that is no longer useable in its present form and using it to produce new products. Reasonable and practicable measures may include, but are not necessarily limited to:

Recovering oils, greases and lubricants for collection by a licensed oil recycling contractor, recovering, separating and recycling packaging (including paper, cardboard, steel and recyclable plastics).

Recycling used plant and equipment to the maximum practicable extent.

Finding alternatives to disposal of non-recyclable materials (using conveyor belts for noise attenuation, mudflaps, ute tray liners).

Providing suitable receptacles and storage areas for collection of materials for recycling.

Energy Recovery from Waste

This refers to recovering and using energy generated from waste. Due to the scale of the operation, energy recovery is not considered viable.

Waste Disposal

This refers to disposing of waste which cannot otherwise be reused, recycled or used for energy recovery. Reasonable and practicable measures may include, but are not necessarily limited to:

Regulated wastes must be transported and disposed of in accordance with the Environmental Protection Regulation 2008.

Disposal to a licensed waste disposal facility (i.e. landfill or transfer station).

Waste Storage

Waste storage containers or areas to be provided and located at safe and convenient locations at the Site. Each container will be identified with the type of wastes which may be disposed of in each container. Each container or area will be designed to prevent the escape of materials.

Regulated Waste and Trackable Waste

Regulated waste is commercial or industrial waste, whether or not it has been immobilised or treated and is of a type or contains a constituent of a type prescribed in the Environmental Protection Regulation 2008. In addition, the Environmental Protection



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Regulation 2008 sets out substances which are trackable waste. All regulated wastes will be transported off-site by a licensed commercial transporter. Regulated waste transport is an ERA if the load is non-commercial and exceeds 250 kg, of any quantity if the load is commercial. If any regulated waste transport occurs, it must be undertaken by a licenced commercial transporter.

Monitoring The Quarry Manager will undertake a monthly visual inspection to ensure the waste management hierarchy is being effectively implemented. All site personnel shall be responsible for ensuring wastes are stored and removed from the Site on a regular basis (e.g. daily or weekly). The Quarry Manager shall ensure that waste treatment measures are implemented at the Site. The Quarry Manager shall ensure waste receptacles are provided and the waste type identified and that temporary waste storage areas are signed, recycling bins are emptied when full and materials which may cause land contamination are not disposed of on the Site. The Quarry Manager shall keep a record of regulated waste generated at the Site, treatment and disposal methods, approved contractors for transporting and disposing of waste and the location of the facility for accepting the waste.

Contingency Plan Where a non-compliance is identified, a review of the WMP will be undertaken to determine areas for improvement. Where necessary, additional staff training on waste management procedures and waste handling will be undertaken. Where the operator becomes aware that regulated waste has been inappropriately disposed of, the incident must be notified to the administering authority in accordance with the incidents and complaints procedure.

Audit and Review: The Quarry Manager or nominated delegate will conduct an annual waste audit.

The Waste Management Plan for the Site shall be reviewed as required or at least once every five (5) years.


The Quarry Manager or nominated delegate shall maintain a manifest of waste and methods of disposal in accordance with Part 3 and Part 4 of the Environmental Protection (Waste) Regulations 2000.

The Quarry Manager or nominated delegate shall be responsible for ensuring that all waste containers are clearly identified for the type of waste they hold and ensure waste is handled in accordance with the Waste Management Plan.

The Quarry Manager or nominated delegate shall keep a record of waste generated at the quarry, treatment and disposal methods, approved contractors for transporting and disposing of waste and the location of the facility for accepting the waste.

All documents relating to waste tracking and disposal shall be maintained and kept on Site for a minimum of five (5) years.

In the event of an incident, the Quarry Manager or nominated delegate shall report to the Works and Services Manager within 24 hours of the incident occurring

The Quarry Manager or nominated delegate shall record the results of monthly checks of waste storage bunds / areas and annual waste audit and report findings to the Works and Services Manager.

All employees shall be responsible for ensuring wastes are temporarily stored in the designated areas and that recycling is undertaken to the maximum practical extent.



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The Quarry Manager or nominated delegate shall ensure all employees and contractors are made aware of the Waste Management Plan and the objective to reduce waste.


Disposal of waste management records prior to five (5) years from date of generation.

Spilled chemicals or liquid wastes enter the stormwater drainage system.

Transport, storage or disposal of wastes by an unlicensed contractor and/or to a facility unlicensed to accept a specific waste.

Waste oils and greases not stored in segregated containers for collection by an approved waste contractor for recycling.

Corrective Action: Quarry Manager or nominated delegate shall investigate the incident and review work place practices.

Quarry Manager or nominated delegate shall facilitate the disposal, recycling or reuse of waste materials as deemed appropriate in an approved manner.



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3.7 Land Management Plan

Purpose

This Land Management Plan has been prepared to assist with site rehabilitation.

Performance Targets

Maintain the general amenity (visual, air quality, water quality, etc.) of the surrounding area.

Prevent the degradation of non-operational areas.

Limit land disturbance to that which is necessary at any one time.

Identify any land contamination and implement appropriate remediation or management where necessary.

Select suitable plant species for revegetation such as local endemic species.

Reinstate stable drainage patterns.

Prevent the introduction or spread of declared weeds and pest species.

Ensure the post-extraction landform is compatible with surrounding land uses, and safe, stable, non-polluting and suitable for the desired long-term land use.


Strategies/mitigation measures for the management of rehabilitation activities at the Site will be implemented in accordance with the relevant conditions of approval and may include the following: Topsoil Management The following measures should be implemented for topsoil stripping:

Topsoil should not be stripped when it is too wet or too dry.

Topsoil when stripped should be used directly for rehabilitation to the maximum practicable extent, or stockpiled and preserved for future use.

Stockpiling of topsoil should not exceed a height of 2 to 3 m and should be shaped (i.e. batters no greater than 3(H):1(V)) and revegetated to protect the soil from erosion and weed infestation.

Stockpiles should be maintained in a free draining condition and long-term soil saturation should be avoided.

Runoff waters external to the areas to be stripped should be diverted away from the working area.

Stripping of topsoil should be limited to the minimum area necessary. The following measures should be implemented for topsoil spreading:

Whenever possible, stripped topsoil should be directly placed on an area undergoing rehabilitation.

Areas to be topsoiled should be re-shaped prior to placing topsoil.

Equipment used to spread topsoil should be scheduled to avoid compaction.

Before respreading the topsoil, loosen the subsoil to break up any compacted or surface sealing and to enable keying of the two (2) soils.

On slopes less than 3(H):1(V), loosen lightly compacted subsoil ensuring all ripping operations occur along the contour.

Topsoil is to be removed from stockpiles in a manner that avoids vehicles travelling over the stockpiles.

Topsoil is to be respread in the reverse sequence to its removal so that the original upper soil layer is returned to the surface to re-establish the entrapped seed content of the soil.

Ensure all exposed subsoils are covered.

Topsoil is to be respread over selected batters, contours, bunds and disturbed areas.

After spreading topsoil, ensure the surface is left in a roughened state to assist moisture infiltration and inhibit soil erosion.



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Prior to any planting, cultivate any compacted or crusted topsoil surfaces (to a depth no greater than the depth of the topsoil).

Soil spreading is to be immediately followed by seeding or planting if applicable.

Organic mulch may be spread over the soil to minimise potential soil erosion until the area is revegetated.

If erosion occurs on treated surfaces, the area is to be re-topsoiled and sown with cover grass.

Progressive Rehabilitation

Progressive rehabilitation is to be carried out during the development of the quarry activities, as the terminal benches are achieved.

Landform

The following measures shall ensure that the landform created by extraction activities is stable and is connected into the surrounding landscape:

Using earthmoving equipment to progressively shape and trim the workings to the desired design profiles and flattening the gradients of selective batters to a stable angle of repose on reaching the terminal limits of extraction.

Rounding or marrying the contours into the natural ground surface.

Scaling down loose rock.

Topsoiling and grassing of contours.

Providing access to the terminal workings to allow maintenance of rehabilitation works.

Designing landform and drainage to control erosion for the particular hydrological regime.

Where necessary, supplementary planting substrates may be used over selected rock faces to assist in retaining soils and precipitation.

Revegetation

Methods for establishing vegetation may include; natural regeneration, hydro-mulching, seed broadcasting, seedling planting and direct seeding.

Natural regeneration followed by seed broadcasting shall be the preferred method of establishing vegetation.

All methods shall be accompanied by appropriate weed control to prevent rehabilitated areas from being overrun with weed species.

Plant species endemic to the area will be selected for revegetation.

Weed and Pest Control

Any materials (e.g. earth, soil, mulch and straw) brought onto the Site for rehabilitation shall be inspected to ensure the materials are free from weeds and pests.

Prior to the establishment of vegetation, a spraying campaign may be required to control weeds to prevent migration of weed species into areas under rehabilitation.

Alternative methods for controlling both grass and weeds may include; manual weeding, slashing, weed matting and mulching.

Predation of rehabilitated areas from grazing animals is to be prevented using methods such as such as fencing, barriers, etc.

Monitoring The Quarry Manager shall conduct regular inspections of any rehabilitated areas to ensure timely maintenance works are carried out as necessary. Maintenance works



Page 32


may include fertilising, watering, repairs to barriers, guards and plant failure replacements, refer to Table 6 – Maintenance Schedule for Revegetation Works. Once any rehabilitation activities are commenced, the Quarry Manager shall undertake a monitoring program to review the ongoing success of the rehabilitation treatment. The Quarry Manager may engage a consultant to assist with any detailed monitoring or management of rehabilitation. The key parameters to be measured as part of the rehabilitation monitoring program will include:

Landform stability

Erosion and sedimentation

Groundcover success (<70% desirable)

Vegetation species composition and density

Water quality

Weed presence. Final rehabilitated areas are to be visually monitored by the Quarry Manager and, where relevant, assessed by suitably qualified persons to determine the effectiveness of measures implemented.

Contingency Plan In the event of any impacts to environmentally sensitive receptors, the incident is to be recorded in accordance with Section 2.8 – Incidents and Complaints Procedure, and the corrective action to be undertaken is to be identified in consultation with the administering authority. In the event that monitoring identifies failures in the rehabilitation implementation, the following contingency measures may be used, however; these will be adapted to the particular failure identified:

Replacement of failed plantings to increase establishment / success rates.

Use of fertilisers and soil ameliorants where necessary.

Reprofiling or eroded or failed landforms.

Application of additional topsoil where necessary to support vegetation growth.

Impletion of additional erosion and sediment controls.

Water quality improvements where necessary.

Audit and Review: The Quarry Manager or nominated delegate shall review the Rehabilitation Management Plan as required and at least once every three (3) years.


The Quarry Manager or nominated delegate shall maintain records on site of audits or monitoring conducted as part of the rehabilitation programs.

Identification of Incident or Failure to Comply

Quarry operations not meeting performance targets and / or conditions of the approved documents.

Corrective Action: Quarry Manager or nominated delegate to assess processes to identify any significant changes and if required, modify activities / processes.



Page 33

Table 6 – Maintenance Schedule for Revegetation Works

Item Activity Frequency

Weed Control

Site preparation (where necessary)

Application of herbicide and / or slashing

One (1) treatment at least two (2) weeks prior to seeding / planting

Ongoing weed management Application of herbicide Suggested biannually or as required

Supplementary weeding Application of herbicide As required

Revegetation management

Vegetation health Monitor performance and conduct any necessary maintenance

One month after seeding / seedling planting.

Three (3) months after seeding / seeding planting.

Six (6) months after seeding / seedling planting.

12 months after seeding / seedling planting. OR

Following significant rainfall events (e.g. >25 mm).

Replace diseased or dead plants Fertilise (if applicable) Apply mulch (if available)

As necessary following maintenance inspections Two (2) months after topsoil spreading or seeding One-off around plantings

Pasture Management

Grass Height Slashing Biannually until established

Grass Vigour Fertilise Annually (if necessary)



Page 34

Reference List

Air Noise Environment (2016) Corbet Quarries Expansion - Noise Assessment ANZECC, (1990). Technical Basis for Guidelines to Minimise Annoyance Due to Blasting Overpressure and Ground Vibration. EHP, (1997). Air Quality Sampling Manual. Brisbane: Department of Environment and Heritage Protection Government. EHP, (2016). Model operating conditions ERA 16 — Extractive and screening activities. Queensland Government: Brisbane. EHP, (2009). Monitoring and Sampling Manual. Queensland Government: Brisbane. EHP, (2014). Stormwater Guideline: Environmentally Relevant Activities. Brisbane: Department of Environment and Heritage Protection Government. Standards Australia, (2004). Australian Standard AS 1940 - The storage and handling of flammable and combustible liquids. Standards Australia, (1998). Australian Standard AS 2187 Explosives - Storage, Transport and Use, Sydney. Standards Australia, (2003). Australian Standard AS 3580.9.6 Determination of Suspended Particulate Matter-PM10 High Volume Sampler with Size Selective Inlet-Gravimetric Method, Sydney. Standards Australia, (2009). Australian Standard AS 3580.9.7 Methods for sampling and analysis of ambient air - Determination of suspended particulate matter - Dichotomous sampler (PM10, coarse PM and PM2.5) - Gravimetric method, Sydney. Standards Australia, (2006). Australian Standard AS3580.9.10 Ambient air – Determination of suspended particulate matter – PM2.5 low volume sampler – Gravimetric method, Sydney. Standards Australia, (2003). Australian Standard AS3580.10.1 Methods for sampling and analysis of ambient air – Determination of particulates – Deposited matter – Gravimetric method, Sydney.

figures

Site Boundary

--- Cadastral Boundary - - - Catchment Boundary -DC- Diversion Channel

- Dirty Water Flow Direction

- Clean Water Flow Direc]on

RPl Surface Water Release Point GROU,NDWOR

Corbet Quarries 1 P r u s

P H : + 6 1 7 387 1 0 4 1 1 VI \IIIII

attachments

Attachment 1 Initial Notification Form

EMERGENCY AND INCIDENT

Department of Environment and Heritage Protection Initial Notification Form

This form is to be completed when notifying the Department of Environmental and Heritage Protection (EHP) of any emergency or incident, which has or may cause environmental harm. The EHP is to be contacted by telephone or facsimile (of this form) within 24 hours after becoming aware of the emergency or incident.

Date: ...........................................................................................................................................................................................

Environmental Authority (EA) Number: ...................................................................................................................................

Operator’s name: ......................................................................................................................................................................

Your name: ................................................................................................................................................................................

Site location: .............................................................................................................................................................................

Name and telephone number of contact person: ..................................................................................................................

.....................................................................................................................................................................................................

Location of emergency or incident within Site: .....................................................................................................................

.....................................................................................................................................................................................................

Time of the emergency / incident / event: ...............................................................................................................................

Time that operators became aware of the emergency / incident / event: .............................................................................

The suspected cause of the emergency / incident / event: ...................................................................................................

.....................................................................................................................................................................................................

The environmental harm caused, threatened, or suspected to be caused by the emergency / incident / event:

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

Actions taken to prevent further environmental harm and mitigate any environmental harm caused by the emergency / incident / event:

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

Name: ..................................................... Signature: ..........................................................

Attachment 2 Further Notification Form

EMERGENCY AND INCIDENT

Department of Environment and Heritage Protection Further Notification Form

Not more than 14 days following the initial notification of an emergency or incident, the holder of the Environmental Authority must provide the following written advice along with the initial notification form. This record must be kept for a period of five (5) years.

Environmental Authority (EA) Number ...................................................................................................................................

Designated contact person: .....................................................................................................................................................

Date of Event: ……/……/…… Time of Event: ……………. am/pm Proposed action to prevent a recurrence of the emergency / incident / event:

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

Outcomes of actions taken at the time to prevent or minimise environmental harm and / or environmental nuisance:

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

Results of any environmental monitoring performed:

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

Further comments:

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

.....................................................................................................................................................................................................

Name: ..................................................... Signature: ..........................................................

Attachment 3 Sediment Basin Volume Calculations

Sediment Basin Storage Volume Estimation

(Stormwater Guideline - Environmentally Relevant Activities - DEHP)

Project Name: Traveston Quarry

Sediment Basin: Quarry Sump QS1

Vs = A * Cv * R (1 in 5; 24hr)

A = 93,000 m2

Equation 4.12 (QUDM)

Cv (pervious) = 0.83 Refer Table 4.9.2 (QUDM)

F (imp) = 0.50 Adopted effective fraction impervious

A (imp) = 46500

Cv (composite) = 0.915

R (1 in 5; 24hr) = 189.36 mm Source: (BoM IFD)

R (1 in 5; 24hr) = 0.18936 m

Vs = 16,114 m3

Vs = 16.11 ML

VSED = 0.5 * Vs

VSED = 8.06 ML

16.11 ML

Sediment Basin Requires a Sediment Storage Volume of 8.06 ML

24.17 ML

Sediment Basin Requires a Upper Settling Volume of

Total Sediment Basin Storage Volume is

Attachment 4 Spill Response Protocol

Spill Response Protocol Hydrocarbons and Chemicals

1.0 Purpose Obligations for management of contaminants that may result in environmental harm are prescribed under the Environmental Protection Act 1994 (EP Act). All necessary preventative measures must be implemented at the operations to prevent or minimise the potential for spills, however if a spill does occur it should be contained, removed and disposed of properly. This Spill Response Protocol provides and the steps outlined in Section 3.0 - Spill Response Procedure provides general guidance for incidental spills of hydrocarbons and chemicals at the activity.

2.0 Roles and Responsibilities

General Manager / Site Manager

Provide resources and continuous training for the management of spills at the Site.

Ensure all personnel at the Site are aware of the requirements of the Spill Response Protocol.

Undertake risk assessments for any spill incident that occurs.

Liaise with third parties and government agencies in relation to spills.

Complete necessary reporting of spills when required.

Personnel Be familiar with, and adhere to, the requirements of this Spill Response Protocol.

Implement good practice and management strategies at the Site to ensure spills are prevented.

Notify all spills to the Site Manager.

3.0 Spill Response Procedure

Upon becoming aware of the spill, the Site Manager is to be notified immediately. Undertake an immediate initial assessment to identify the following:

Type and volume of the spilled substance.

Source of the spill and whether it can be isolated.

Safety and Personal Protection Equipment (PPE) requirements for the substance as outlined in the Materials Safety Data Sheets (MSDS).

Whether site personnel can contain and manage the spill, or whether third party and emergency services are required.

The substrate of the spill surface (e.g. soil, concrete hardstand).

Initial Assessment and

Action

P: +61 7 3871 0411 F: +61 7 3367 3317 www.groundwork.com.au

Spills within a waterbody or watercourse pose a higher risk of potential environmental harm and may require additional assistance from third parties / government agencies. The administering authority must be notified and professional assistance sought regarding clean-up operations.

All personnel working in the immediate vicinity of the spill should be notified and all work in that area should cease immediately. The movement of plant/equipment has the potential to spread the spill and contaminate other areas, therefore avoid moving plant/equipment where possible.

If possible, the spill is to be contained by constructing a temporary bund and absorbing the spill with the spill kits provided, or an alternative absorbent material (e.g. clay, rags). DO NOT USE WATER OR OTHER LIQUIDS TO WASH THE SPILL AREA

Major spills may require additional and / or specialist treatment, which will be determined by the Site Manager. The following general spill removal / clean-up methods may be used:

Remove the spill by shovels and / or earthmoving equipment.

Repair equipment at spill location if possible if mobile plant/equipment is the source of the spill.

Where necessary or possible to do so, move plant and equipment to allow the removal of the spill.

Contaminated soils / materials are to be disposed off-site by an approved regulated waste transport contractor in accordance with the legislated regulated waste requirements to a lawful disposal facility.

Under no circumstances should materials containing the contaminant be disposed of on-site.

All spills of hydrocarbons and/or chemicals are to be reported to the Site Manager, who in turn will undertake a risk assessment of the spill to determine if there is potential for environment harm to occur. If the risk assessment determines a high or extreme level of risk of environmental harm is posed, the incident must be reported to the Pollution Hotline on 1300 130 372 within 24 hours of becoming aware of the incident. Refer to the Incident and Complaint Procedure for further information in relation to reporting.

4.0 Risk Assessment The following provides the risk assessment framework that may be adopted by the Site Manager to undertake a qualitative risk-based assessment, based on the likelihood of an environmental harm occurring (Table A – Definitions of Likelihood), and the consequences of the occurrence on the surrounding environment (Table B – Definitions of

Isolate the Spill

Contain

Remove / Clean-up

Report

Consequence). The likelihood and consequences are scored between 1 and 5 for each potential impact or event. The risk assessment has been formulated considering potential for impact without control measures put in place to manage potential risk.

Table A – Definitions of Likelihood

Rating Descriptor Score

Rare May occur only in exceptional circumstances 1

Unlikely Could occur but doubtful 2

Possible Might occur at some time in the future 3

Likely Will probably occur 4

Almost Certain Is expected to occur in most circumstances 5

Table B – Definitions of Consequence

Rating Descriptor Score

Negligible Impacts not requiring any treatment or management action 1

Minor Nuisance or insignificant environmental harm requiring minor management action

2

Moderate Serious environmental impacts, readily manageable at low cost 3

Major Substantial environmental impacts, manageable but at considerable cost and some disruption

4

Catastrophic Severe environmental impacts with major consequent disruption and heavy cost

5

The consequence and likelihood scores are then plotted on the risk assessment matrix (Table C – Risk Assessment Matrix) and the final risk level assigned is a product of the likelihood and consequence scores. The higher the risk score, the higher the priority is for management.

Table C – Risk Assessment Matrix

Likelihood

Consequence

Negligible Minor Moderate Major Catastrophic

1 2 3 4 5

Almost Certain 5 5

Medium 10

High 15

High 20

Extreme 25

Extreme

Likely 4 4

Low 8

Medium 12

High 16

High 20

Extreme

Possible 3 3

Low 6

Medium 9

Medium 12

High 15

High

Unlikely 2 2

Low 4

Low 6

Medium 8

Medium 10

High

Rare 1 1

Low 2

Low 3

Low 4

Low 5

Medium

Corbet Quarries Expansion - Noise Assessment

Corbet Quarries

Issued: 25 November 2016

Prepared by:Air Noise Environment

ABN: 13 081 834 513

This document has been prepared and issued by Air Noise Environment Pty Ltd in accordance with

our Quality Assurance procedures. Authorship, copyright details and legal provisions relating to this

document are provided on the following page. Should you have any queries regarding the contents

of this document, please contact your nearest Air Noise Environment office:

Brisbane Office

A: Unit 3, 4 Tombo Street,

Capalaba, QLD 4157

T: +61 7 3245 7808

E: [email protected]

Sydney Office

A: Level 6, 69 Reservoir Street

Surry Hills, NSW 2010

T: +61 1300 851 761

E: nsw @ane.com.au

Page 2 of 37 Corbet Quarries- Corbet Quarries Expansion - Noise Assessment

/Network/Projects/4779/Reporting/4779-Rep-03.odt

mailto:[email protected]



DOCUMENT CONTROL SHEET

Document Details

Project Reference: 4779

Document Title: Corbet Quarries Expansion - Noise Assessment

Client: Corbet Quarries

Document Reference: /Network/Projects/4779/Reporting/4779-Rep-03.odt

Revision History

Version: Description: Date: Author: Approved by:

00 Draft for Internal Review 17/11/16 Brett Verran -

01 Draft for Client 18/11/16 Brett Verran Beau Weyers

02 Final 22/11/16 Brett Verran Claire Richardson

03 Revised Final 25/11/16 Brett Verran Claire Richardson

04

05

Copyright:

Air Noise Environment retains ownership of the copyright to all reports, drawings, designs, plans, figures and other workproduced by Air Noise Environment Pty Ltd during the course of fulfilling a commission. The client named on the cover of thisdocument shall have a licence to use such documents and materials for the purpose of the subject commission provided theyare reproduced in full or, alternatively, in part with due acknowledgement to Air Noise Environment. Third parties must notreproduce this document, in part or in full, without obtaining the prior permission of Air Noise Environment Pty Ltd.

Disclaimer:

This document has been prepared with all due care and attention by professional environmental practitioners according toaccepted practices and techniques. This document is issued in confidence and is relevant only to the issues pertinent to thesubject matter contained herein. Air Noise Environment Pty Ltd holds no responsibility for misapplication or misinterpretationby third parties of the contents of this document. If the revision history does not state that a Final version of the documenthas been issued, then it remains a draft. Draft versions of this document should not be relied upon for any purpose by theclient, regulatory agencies or other interested parties.

Where site inspections, testing or fieldwork have taken place, the report is based on the information made available by theclient or their nominees during the visit, visual observations and any subsequent discussions with regulatory authorities. It isfurther assumed that normal activities were being undertaken at the site on the day of the site visit(s).

The validity and comprehensiveness of supplied information has not been independently verified and, for the purposes of thisreport, it is assumed that the information provided to Air Noise Environment Pty Ltd for the purposes of this project is bothcomplete and accurate.



Executive SummaryA quarry and concrete batching plant is proposed at 1944 Bruce Highway, Traveston. The

development site currently operates as a soil manufacturing and composting facility which includes

the use of a borrow pit for on site construction activities. It is proposed to expand the existing borrow

pit to a commercial operation. A concrete batching plant is also proposed. A noise assessment has

been undertaken to identify appropriate noise criteria, and review the predicted compliance of the

proposed operations at the surrounding sensitive receiver areas.

To assess potential noise impacts, the proposed activities have been reviewed and computational

modelling has been undertaken to predict impacts on the nearest sensitive receptors, and where

appropriate, identify mitigation and management measures conducive to achieving predicted

compliance with the adopted noise criteria.

To establish noise criteria for the proposed development, background noise monitoring was

undertaken at the nearest sensitive receptors to the east of the development. From site observations

and a review of audio files, the Bruce Highway was identified as a major noise source defining noise

levels. The noise data was analysed to derive noise criteria in accordance with the Model Mining

Conditions issued by the DEHP and the EPP Noise based on conservative ambient levels on the

Sunday (when noise from the existing mine activities were not contributing).

The results of the computational modelling indicate compliance with the derived noise criteria

provided that the following measures are implemented:

⚫ Dust extraction fan located at concrete batching plant is limited to a SWL of 92 dB(A);

⚫ Installation of minimum 3.5 m high acoustic barriers shielding areas of truck slumping activities

at the concrete batching plant (See Figure 5.3).

⚫ Restricting deliveries of cement to the on-site storage silos to the Day and Evening Periods

(7 am – 10 pm).

⚫ Restricting drilling in the quarry to the Day period (7 am – 6 pm).

⚫ Restricting any ongoing excavator activities occurring on the western face of the pit during the

early morning period (6 am – 7 am) and programming activities in the area for higher ambient

noise periods (e.g. morning/afternoon peak traffic periods).

The impacts of blasting on the nearest sensitive receptors was also investigated. Predictive

equations found with a blast to receptor separation distance of 420 m, a Maximum Instantaneous

Charge (MIC) of 200 kg is required to achieve compliance with the adopted vibration criteria. As the

quarry progresses moving south, the MIC can be increased to 600 kg.



Table of ContentsExecutive Summary 4

1 Introduction 7

1.1 Scope of Study 7

1.2 Subject Site Location and Surrounding Land Uses 7

1.3 This Report 8

2 Summary of Potential Impacts 9

2.1 Description of Operations 9

2.2 Potential Noise Sources 10

2.3 Cumulative Impacts 11

2.4 Potentially Sensitive Receptors 11

3 Existing Environment 12

3.1 Local Meteorology 12

3.2 Existing Acoustic Environment 13

3.2.1 Overview 13

3.2.2 Noise Monitoring Methodology 13

3.2.3 Noise Monitoring Results 14

3.3 Discussion of Noise Monitoring Results 17

4 Assessment Criteria 18

4.1 Overview 18

4.2 Noise Criteria 18

4.2.1 DEHP Model Mining Conditions 18

4.2.2 EPP Noise 2008 20

4.2.3 Discussion of Noise Criteria 21

4.3 Criteria for Blasting 22

5 Noise Assessment 23

5.1 Modelling Methodology 23

5.2 Ground Elevation Data 23

5.3 Modelled Receptor Groups 23

5.4 Noise Source Data 24

5.5 Noise Modelling Scenarios 27

5.6 Predicted Noise Results (With Mitigation) 30

5.7 Blasting 32

6 Conclusion 35

Appendix A - Acoustic Glossary 36



Index of TablesTable 3.1 - Noise Instrument Calibration Information 14

Table 3.2 - Position N1 – Summary of Noise Levels dB(A) 14



Table 3.5 - Summary of Average Noise Levels for Each Period 17

Table 3.6 - Adopted Background Noise Levels (Position N1 – 31/10/16) 17

Table 4.1 - Model Mining Noise Conditions for Sensitive Receptors 19

Table 4.2 - Derived Noise Criteria 19

Table 4.3 – Controlling Background Creep – dB(A) 20

Table 4.4 - Acoustic Quality Objectives for Residential Dwellings 21

Table 4.5 - Adopted EPP Noise Criteria for the Concrete Batching Plant – dB(A) 22

Table 4.6 - Blasting Criteria 22

Table 5.1 - Modelled Noise Source Data (SWL Leq) 25

Table 5.2 – Predicted Noise Levels – dB(A) – With Mitigation 31

Table 5.3 - Maximum Allowable Charge Mass 33

Index of FiguresFigure 1.1 - Subject Site Location and Surrounding Land Uses 8

Figure 2.1 - Proposed Site Layout 10

Figure 3.1 - 2006 Gympie Bureau of Meteorology Station Wind Rose 12

Figure 3.2 - Unattended Noise Monitoring Locations 13

Figure 5.1 - Modelled Discrete Receptors 24

Figure 5.2 - Modelled Quarry Noise Source Locations 29

Figure 5.3 - Modelled Concrete Batching Noise Plant Sources 30



1 Introduction

1.1 Scope of StudyCorbet Quarries commissioned Air Noise Environment Pty Ltd to undertake a noise assessment for a

proposed expansion of their operations at 1944 Bruce Highway, Traveston. Specifically, the proposal

comprises the following components:

• Material Change of Use – Development Permit for Extractive Industry and High Impact

Industry (Concrete Batching Plant);

• Material Change of Use – Concurrent Environmentally Relevant Activities (ERAs); and

• Environmental Authority for Environmentally Relevant Activities (ERAs);

◦ ERA 16(2)(b) Extracting, other than by dredging, in a year, the following quantity of

material – more than 100,000 tonnes but not more than 1,000,000 tonnes and

◦ ERA 16(3)(b) Screening, in a year, the following quantity of material – more than 100,000

tonnes but not more than 1,000,000 tonnes.

The study has been undertaken to assess the potential impacts of the proposed operations on

nearby sensitive receptors in accordance with the requirements of Gympie Regional Council (GRC),

the Department of Environment and Heritage Protection (DEHP) and the Environmental Protection

Noise Policy 2008 (EPP Noise).

1.2 Subject Site Location and Surrounding Land UsesThe subject site is located at 1944 Bruce Highway, Traveston, described as Lot 520/ SP263809. The

site currently operates as a soil manufacturing and composting facility in addition to a borrow pit

which provides materials for onsite construction activities. It is proposed to extend the existing

borrow pit to a commercial operation supplying external customers and/or the market with an

expected generation of 200,000 tonnes per annum. In addition to the quarry, a concrete batching

plant is also proposed to be constructed with an expected production volume of 40,000 cubic metres

per annum.

Under the Gympie Regional Council 2013 Planning Scheme, the subject site and surrounding area are

zoned as Rural. The site is bounded by state-controlled roads (Bruce Highway and Mary Valley Link

Road) to the east and south. The adjoining properties consist of primarily rural land uses, with the

exception of an outdoor recreation and education facility (Garapine) located to the north at

24 Mountain View Road, Kybong. This use has been identified as the nearest sensitive receptor in

addition to the residential uses located on the same lot. The accommodation and facilities are

located approximately 420 m from the proposed quarry.

Figure 1.1 presents the subject site location and surrounding land uses.



Figure 1.1 - Subject Site Location and Surrounding Land Uses

1.3 This ReportThis report summarises the methodology, results and conclusions of the assessment. A glossary of

terms is presented in Appendix A to assist the reader.



2 Summary of Potential Impacts

2.1 Description of OperationsThe subject site currently operates as a soil manufacturing and composting facility which includes a

borrow pit for on site construction activities. It is proposed to extend the existing borrow pit to a

commercial operation for supply to external customers. The quarry, to be located in the south-

western portion of the site, has a footprint of approximately 9.3 hectares and will generate

approximately 200,000 tonnes per annum of extracted material.

The quarry process will involve the removal of the overburden and more weathered metamorphics

via dozer or excavator ripping in the upper bench. Conventional drill and blast methodologies will

occur in the benches below this. The quarried material is then processed within the pit using several

mobile crushing and screening plant items for sizing the material.

The proposed quarry expansion is proposed to operate from 6 am to 7 pm Monday to Saturday.

Approximately 4 to 6 blasts per year are proposed between the hours of 9 am and 3 pm Monday to

Friday and 9 am and 1 pm on Saturdays.

In addition to the quarry, a concrete batching plant to the east of the quarry is proposed. Aggregate

sourced from the quarry will provide the necessary materials for the concrete batching process which

has an expected production volume of 40,000 cubic metres per annum. The proposed operating

hours for the concrete batching plant are 24 hours per day.

With the exception of plant items associated with the concrete batching, no additional plant items

are proposed; however, based on the production volumes and the combined operations, an

additional 41 haul truck movements per day are likely to occur.

Figure 2.1 presents the proposed site layout including the quarry and concrete batching plant

locations.



Figure 2.1 - Proposed Site Layout

2.2 Potential Noise SourcesThe main noise generating activities include both stationary and mobile equipment required for the

quarry process. A list of processing and mobile equipment expected to operate at the site is as

follows:

⚫ Quarry Operations (6 am – 6 pm):

⚫ Processing plant items

⚫ Primary Crusher - Finlay J1175 jaw crusher

⚫ Secondary Crusher - 1300 Cone Terex Pegson crusher

⚫ Tertiary Crusher - 1000 Maxtrax Cone crusher

⚫ Quaternary Crusher – Lokotrax 7150 VSI

⚫ 1 x horizontal screen



⚫ Mobile machinery

⚫ water cart

⚫ dump trucks

⚫ excavators

⚫ front end loaders

⚫ bulldozers

⚫ drill rig

⚫ Concrete Batching Plant (24 Hours)

⚫ front end loader

⚫ conveyor motor

⚫ truck slumping

⚫ dust extraction fan

⚫ truck dumping raw materials

⚫ cement deliveries

2.3 Cumulative ImpactsThe proposed quarry and concrete batching plant will operate in conjunction with the current soil

manufacturing and composting operation. The soil manufacturing and composting facility includes

the use of mulchers, haul trucks and mobile plant equipment. The potential cumulative noise

impacts associated with these items and activities have been considered in this assessment.

2.4 Potentially Sensitive ReceptorsThe surrounding area and adjoining properties consist of primarily rural land uses, with the exception

of an outdoor recreation and education facility (Garapine) located to the north. This facility provides

a range of activities including mountain biking, school camps, weddings and accommodation. This

use has been identified as the nearest sensitive receptor with several outdoor activities including

high ropes and a flying fox located within close proximity to the site boundary. The accommodation

facilities associated with the facility are located approximately 420 m from the proposed quarry.

Other nearby sensitive uses consist of predominately rural residential properties located between

600 m to 1100 m from the subject site. Figure 1.1 presents the subject site location and surrounding

uses.



3 Existing Environment

3.1 Local MeteorologyFigure 3.1 presents 2007 wind roses derived from the Bureau of Meteorology (BOM) Gympie station

data. The Gympie station represents the nearest BOM station to the site (approximately 15 km to the

north of the site). The area is dominated by a south easterly wind component during all periods (day,

evening and night) with wind speeds becoming lighter during the night period. These wind conditions

result in the nearest sensitive receptor being located downwind from the proposed quarry for the

greatest proportion of time.

Figure 3.1 - 2006 Gympie Bureau of Meteorology Station Wind Rose



3.2 Existing Acoustic Environment

3.2.1 Overview

In order to derive noise criteria for the site, unattended noise monitoring was undertaken at three

locations from 24 October to 1 November 2016. These three positions included one location

representative of the nearest sensitive receptor and two located close to the site boundary for model

calibration purposes. During a site visit to the area, existing operations at the subject site were

audible at all three locations. In addition to noise from the subject site, traffic noise from the Bruce

Highway, bird and insect noise was also noted from site observations and a review of audio

recordings.

The following sections outline the noise monitoring methodology and results.

3.2.2 Noise Monitoring Methodology

Background noise monitoring was undertaken at three locations. Position N1 was chosen to represent

the outdoor education facility and has been used to derive the background noise levels for the

nearest sensitive receptors. The remaining two locations have been used for model calibration

purposes. Figure 3.2 presents the noise monitoring locations.

Figure 3.2 - Unattended Noise Monitoring Locations



Noise measurements were undertaken in accordance with the requirements of the Australian AS

1055-1997 'Acoustics – Description and measurement of environmental noise'. Type 1 sound level

meters were utilised for the background noise logging. The instruments were situated in a free-field

position. The serial numbers and calibration information for the instruments are presented in

Table 3.1. An averaging time of 15 minutes was adopted and measurements with microphones

positioned at a height of 1.2 metres above ground level and fitted with a windshield throughout the

measurements.

Table 3.1 - Noise Instrument Calibration Information

PositionInstrument/ Serial

No.Monitoring Dates

NATA

Calibration

Current to:

Pre-

Calibration

Post-

Calibration

N1 ARL Ngara (878065) 24/10/16 – 30/10/16 17/11/17 94.0 94.0

N2 Norsonic 140 (1404663) 24/10/16 – 01/11/16 16/07/17 94.0 94.0

N3 ARL Ngara (87808A) 24/10/16 – 28/10/16 15/04/17 94.0 94.2

Calibrator Rion NC74 (334483804) - 16/11/16 - -

Wind and rainfall data from the Gympie Bureau of Meteorology station indicates approximately

3 hours of noise data was potentially affected by rainfall. To avoid a weather-related bias, noise

measurements associated with wind or rain-affected periods have not been considered.

3.2.3 Noise Monitoring Results

Table 3.2 and 3.3 presents a summary of the averages of each monitoring period (day, evening and

night). Table 3.5 presents a summary of averages for each period across the whole monitoring

period. In accordance with the DEHP Planning for Noise Control guideline, the Assessment

Background Level (ABL) or minLA90,1-hour is the 90th percentile LA90,1-hour of each period. The Rating

Background Level (RBL) is the median ABL across the whole monitoring period for the relevant period

of the day.

Table 3.2 - Position N1 – Summary of Noise Levels dB(A)

Date Period LAMax LA1 LA10 LA90 LAeq ABL

24/10/16 Day 61.9 55.2 50.6 45.8 53.7 43.7

Evening 51.0 47.2 43.6 36.3 41.5 34.1

Night 55.5 50.2 45.1 36.1 45.3 31.7

25/10/2016 Day 63.2 56.9 51.6 44.8 50.1 42.5

Evening 53.9 49.0 45.7 38.9 43.6 36.7




Night 56.1 50.6 46.0 36.3 45.2 31.0

26/10/2016 Day 61.8 55.5 50.4 44.5 49.0 42.1

Evening 57.0 50.6 46.9 40.1 45.4 37.5

Night 56.1 49.8 45.3 36.8 44.5 32.1

27/10/2016 Day 60.8 54.5 49.4 43.8 47.8 42.7

Evening 55.0 50.9 47.6 39.6 46.4 36.4

Night 55.3 49.6 45.5 35.3 44.8 29.4

28/10/2016 Day 61.1 53.7 49.6 45.0 48.3 43.2

Evening 53.8 48.6 45.2 38.8 44.7 35.5

Night 56.9 50.1 44.9 33.4 45.6 29.2

29/10/2016 Day 62.7 54.8 49.9 44.3 49.1 42.6

Evening 55.0 47.8 44.3 36.4 45.0 33.3

Night 56.2 49.4 42.5 31.9 42.9 27.1

30/10/2016 Day 61.9 54.9 49.6 43.4 48.6 40.3

Evening 52.7 49.0 45.7 38.9 46.2 35.2

Night 55.3 49.1 44.0 33.9 45.0 29.4

31/10/2016 Day 60.8 54.2 48.7 43.6 47.5 43.1



24/10/16 Day 64.4 57.8 52.3 46.3 52.4 43.7

Evening 52.1 48.0 43.4 35.2 41.4 32.8

Night 56.2 49.6 43.3 32.8 43.4 27.8

25/10/16 Day 59.7 52.9 47.1 41.2 47.7 37.8

Evening 52.3 47.4 44.1 37.4 41.8 35.0

Night 56.2 50.9 45.5 34.8 43.7 30.4

26/10/16 Day 60.5 52.4 46.5 40.7 45.6 38.7

Evening 52.2 47.8 44.5 38.8 42.9 36.4

Night 57.0 50.9 45.7 36.0 44.5 31.1

27/10/16 Day 60.9 53.1 46.8 40.8 46.1 38.9

Evening 54.0 48.4 44.2 37.3 43.5 35.0

Night 56.9 50.3 45.5 34.7 44.4 29.2




28/10/16 Day 63.2 56.3 52.0 46.9 51.0 41.8

Evening 54.2 49.3 45.0 39.1 43.5 35.5

Night 55.3 48.6 42.3 31.4 41.6 27.2

29/10/16 Day 61.1 53.5 49.4 42.7 48.7 38.4

Evening 53.3 48.3 43.8 36.7 42.8 33.0

Night 55.0 47.7 40.7 29.3 41.5 23.7

30/10/16 Day 61.8 54.3 49.1 42.0 48.9 36.6

Evening 53.5 47.1 43.3 37.7 42.1 34.9

Night 53.7 47.0 41.4 32.6 41.8 28.4

31/10/16 Day 60.9 54.0 50.0 45.8 48.9 41.9

Evening 51.9 47.6 44.0 38.6 42.6 36.0

Night 51.4 44.8 39.8 32.4 39.0 28.9

01/11/16 Day 64.5 55.6 51.2 46.2 50.8 41.6

Evening 58.6 51.2 48.0 39.9 47.6 37.0



24/10/16 Day 65.3 57.3 48.3 33.1 47.5 31.0

Evening 46.3 41.8 36.8 27.9 39.6 24.2

Night 51.0 43.6 36.4 26.2 43.9 19.9

25/10/2016 Day 61.4 55.0 47.9 34.9 45.6 33.4

Evening 48.0 44.0 39.5 29.6 41.5 27.1

Night 50.8 43.6 37.6 28.0 46.3 20.9

26/10/2016 Day 62.9 55.5 48.4 35.2 46.3 33.3

Evening 48.1 43.7 38.3 31.2 41.8 27.9

Night 51.5 43.6 37.6 28.9 46.6 22.4

27/10/2016 Day 63.6 56.1 48.2 34.7 47.3 33.1

Evening 45.6 41.7 37.8 31.1 41.9 27.6

Night 50.0 43.5 38.1 29.4 44.5 22.1

28/10/2016 Day 61.7 54.6 47.9 34.3 45.4 32.5

Evening 50.5 46.9 42.5 34.2 44.3 29.1



Table 3.5 - Summary of Average Noise Levels for Each Period

Position Period LAMax LA1 LA10 LA90 LAeq RBL

N1

Day 62 55 50 44 49 43

Evening 54 49 46 38 45 36

Night 56 50 45 35 45 30

N2

Day 61 54 49 43 49 39

Evening 53 48 44 37 43 35

Night 56 49 44 33 43 28

N3

Day 63 56 48 34 46 33

Evening 48 44 39 31 42 28

Night 51 44 37 28 45 22

3.3 Discussion of Noise Monitoring ResultsFrom site observations and a review of audio recordings, noise from existing operations at the

subject site was audible at all three positions. Based on this, to derive background noise levels with

the absence of any existing operations, measured noise levels on Sunday 31 October for position N1

have been adopted. It is noted this may result in conservative assessment criteria. Table 3.6 presents

the adopted background noise levels.

Table 3.6 - Adopted Background Noise Levels (Position N1 – 31/10/16)

Period LAMax LA1 LA10 LA90 LAeq RBL

Day 62 55 50 43 49 40

Evening 53 49 46 39 46 35

Night 55 49 44 34 45 29



4 Assessment Criteria

4.1 OverviewPotential noise emissions from the proposed quarry and concrete batching plant must meet the

requirements of both the Gympie Regional Council (GRC) and the Department of Environment

Heritage Protection (DEHP).

The GRC Planning Scheme does not provide any specific noise criteria or goals.

Guidance with respect to appropriate DEHP limits is available from a number of sources. The existing

activities at the site currently operate under an environmental authority permit no. EPPR02748514,

and this defines specific noise limits. The Environmental Protection (Noise) Policy (EPP Noise) defines

acoustic quality criteria for Queensland, and DEHP has also released draft Model Operating

Conditions ERA16 – Extractive and Screening Activities (16 February 2016) and draft Model Mining

Conditions (26 November 2014). It is noted that the draft Model Operating Conditions ERA16 –

Extractive and Screening Activities only provides vibration and airblast over pressure limits for

blasting activities.

As new planning conditions will be issued for the combined site operations, if approved, it is relevant

to consider the current planning requirements relating to noise as defined in the EPP Noise and the

model mining conditions as opposed to making reference to the existing licence conditions.

The following sections outline the adopted assessment criteria.

4.2 Noise Criteria

4.2.1 DEHP Model Mining Conditions

Table 4.1 presents noise limits outlined in the DEHP Model Mining Conditions.



Table 4.1 - Model Mining Noise Conditions for Sensitive Receptors

Noise Level

dB(A)

measured

as:


7 am to 6 pm 6 pm to 10 pm 10 pm to 7 am 9 am to 6 pm 6 pm to 10 pm 10 pm to 9 am

LAeq,adj,15mins CV = 50

AV = 5

CV = 45

AV = 5

CV = 40

AV = 0

CV = 45

AV = 5

CV = 40

AV = 5

CV = 35

AV = 0

LA1,adj,15mins CV = 55

AV = 10

CV = 50

AV = 10

CV = 45

AV = 5

CV = 50

AV = 10

CV = 45

AV = 10

CV = 40

AV = 5

1. CV = Critical Value

2. AV = Adjustment Value

3. To calculate noise limits:

If bg <= CV – AV, then noise limit = bg + AV

If CV – AV < bg <= CV, then noise limit = CV

If bg > CV, then noise limit = bg + 0

4. In the event that measured bg (LA90, adj,15mins) is less than 30 dB(A), then 30 dB(A) can be substituted for the

measured background level

5. bg = background noise level (LA90, adj, 15 mins) measured over 3-5 days at the nearest sensitive receptor

6. If the project is unable to meet the noise limits as calculated above alternative limits may be calculated using the

processes outlined in the “Planning for Noise Control” guideline

Based on the background noise monitoring data, background levels are 40 dB(A), 35 dB(A) and

29 dB(A) during the day, evening and night periods respectively. According to the Model Mining

Conditions, where measured levels are less than 30 dB(A), then 30 dB(A) should be adopted as the

background level for deriving noise criteria. Based on this, the following noise criteria is applicable to

the project:

Table 4.2 - Derived Noise Criteria

Noise Level

dB(A)

measured

as:


7 am to 6 pm 6 pm to 10 pm 10 pm to 7 am 9 am to 6 pm 6 pm to 10 pm 10 pm to 9 am

LAeq,adj,15mins 45 40 30 45 40 30

LA1,adj,15mins 50 45 35 50 45 35



4.2.2 EPP Noise 2008

For assessment of potential noise impacts from the proposed concrete batching plant, criteria

presented in the EPP Noise has been adopted. The EPP provides background creep criteria and

acoustic quality objectives (AQOs) for which new developments must comply with. The background

creep criteria is defined as follows:

'To the extent that it is reasonable to do so, noise from an activity must not be -

(a) for noise that is continuous noise measured by LA90,T – more than nil dB(A) greater than

the existing acoustic environment measured by LA90,T; or

(b) for noise that varies over time measured by LAeq,adj,T – more than 5 dB(A) greater than

the existing acoustic environment measured by LA90,T.

Table 4.3 presents the background creep noise criteria derived from the background noise

monitoring, and Table 4.4 presents the acoustic quality objectives for the applicable uses. For

assessment of noise impacts on the Garapine outdoor activities, the Acoustic Objective for School or

playground uses has been adopted.

Table 4.3 – Controlling Background Creep – dB(A)

Period RBLContinuous Noise

Sources LAeq,adj,1hr dB(A)

Variable Noise

Sources

LAeq,adj,1hr dB(A)

Day 40 40 45

Evening 35 35 40

Night 29 29 34



Table 4.4 - Acoustic Quality Objectives for Residential Dwellings

Sensitive

ReceptorTime of Day

Acoustic Quality Objectives - dB(A)Environmental

ValueLAeq,adj,1hr

dB(A)

LA10,adj,1hr

dB(A)

LA1,adj,1hr

dB(A)

Dwelling (for

indoors)

Daytime and

Evening35 40 45 Health and wellbeing

Night 30 35 40

Health and wellbeing in

the relation to the ability

to sleep

School or

playground (for

outdoors)

When the

children usually

play outside

55 - -Health and well-being,

and community amenity

To allow comparison with the internal noise acoustic quality objectives, a 5 dB reduction has been

applied to external noise predictions.

4.2.3 Discussion of Noise CriteriaAs no noise limits are specified in the Model Operating Conditions ERA16 - Extractive Industries, for

comparison of predicted noise levels from the proposed quarry operation, the noise limits specified in

the Model Mining Conditions have been adopted as presented in Table 4.2. Given the similar noise

sources and operational activities between the two industries, these limits are considered the most

appropriate and applicable for the assessment.

For assessment of noise impacts from the proposed concrete batching plant, the criteria presented in

the EPP Noise have been adopted. A comparison of the acoustic quality objectives and derived

background creep criteria is presented in Table 4.5 below. For continuous noise sources, the

background creep criteria has been adopted. The most stringent of the two criterion has been

adopted for assessment of non-continuous sources.

As stated previously, for assessment of noise levels for the outdoor activities at the nearby Garapine

facility, the EPP Acoustic Quality Objective for school or playgrounds has been adopted.



Table 4.5 - Adopted EPP Noise Criteria for the Concrete Batching Plant – dB(A)

Period Acoustic

Quality

Objectives

(LAeq,adj,1hour)1

Background Creep Adopted Criteria

Non-

Continuous

(LAeq,adj,1hour)

Continuous

(LAeq,adj,1hour)

Non-

Continuous

(LAeq,adj,1hour)

Continuous

LAeq,adj,1hour

Day (7 am – 6 pm 40 45 40 45 40

Evening (6 pm - 10pm) 40 40 35 40 35

Night (10 pm – 7 am) 35 34 29 34 29

1 + 5 added to criteria for comparison to external criteria

4.3 Criteria for BlastingThe DEHP provides criteria for blasting in the Model Operating Conditions – ERA16 – Extractive and

Screening Activities (February 2016). The limits apply to the 7 am to 6 pm period only. Blasting for

the proposed quarry will only occur during the 8 am to 4 pm period.

Table 4.6 - Blasting Criteria

Blasting Noise Limits Sensitive or commercial receptor blasting noise limits

Airblast Overpressure 115 dB (Linear) Peak for 9 out of 10 consecutive blasts initiated and not

greater than 120 dB (Linear) Peak at any time

Ground Peak Vibration Particle

velocity

5 mm/second peak particle velocity for 9 out of 10 consecutive blasts and

not greater than 10 mm/second peak particle velocity at any time



5 Noise Assessment

5.1 Modelling MethodologyFor the purposes of predicting impacts associated with noise emissions from the proposed quarry

and concrete batching plant on nearby sensitive receptors, noise modelling has been undertaken

using the proprietary software Cadna/A (Computer Aided Noise Abatement Model) developed by

DataKustik. Cadna/A incorporates the influence of meteorology, terrain, ground type and air

absorption in addition to source characteristics to predict noise impacts at receptor locations.

The model is utilised to assess the potential noise emissions from the site under a range of operating

scenarios and meteorological conditions. The noise modelling also allows investigation of possible

noise management solutions, in the event that non-compliance with the assessment criterion is

predicted. The following sections discuss the inputs, assumptions and results of the noise modelling.

All predictions have been undertaken in accordance with ISO Standard 9613-2 (1996) Acoustics -

Attenuation of sound during propagation outdoors. ISO 9613-2 predictions are relevant for light to

moderate downwind conditions or a well-developed moderate ground-based temperature inversion

(e.g. clear, calm night).

5.2 Ground Elevation DataTo account for ground height variability, terrain data for the area surrounding the development was

obtained from the Digital Elevation Model (DEM) 5 Metre Grid of Australia derived from LiDAR model,

which represents a National 5 metre (bare earth) DEM that has been derived from some 236 individual

LiDAR surveys between 2001 and 2015. Terrain heights for the proposed quarry pit have been

obtained from the proponent.

5.3 Modelled Receptor GroupsThirteen (13) discrete receptors have been modelled to represent the nearest sensitive receptors

surrounding the proposed quarry site. These discrete receptors are identified in Figure 5.1. Also

considered in the assessment is the nearest outdoor activity at the nearby Garapine education

facility which has been denoted as C1 on Figure 5.1.



Figure 5.1 - Modelled Discrete Receptors

5.4 Noise Source DataTable 5.1 presents the modelled noise source data for the expected sources as discussed in

Section 2.2. Source noise measurements for the crushers and mulcher have been obtained from on

site measurements undertaken at the existing Corbet operation by ANE. Data for other sources have

been sourced from ANE's extensive in-house noise data base and available literature. The data

presented in Table 5.1 represent Leq noise levels.



Table 5.1 - Modelled Noise Source Data (SWL Leq)

Plant Item/Noise Source Frequency Spectra (SWL)

A Lin31.5 63 125 250 500 1k 2k 4k 8k

Quarry Sources

Finlay J1175 Crusher2 97 111 114 110 111 108 105 99 91 113 118

Cone Terex Pegson Crusher 101 113 118 109 112 101 97 93 86 111 120

1000 Maxtrax Cone Crusher 97 109 113 108 104 101 98 92 85 107 116

Horizontal Screen 100 98 94 90 93 92 89 84 82 96 104

Lokotrac 7150 VSI Crusher 97 111 114 110 111 108 105 99 91 113 118

Haul Truck (10km/h) 102 105 98 100 90 90 96 98 98 103 109

Bulldozer - 117 118 109 101 102 98 96 92 108 121

40 t Excavator - 105 114 103 103 99 97 92 83 106 115

Front End Loader 77 82 84 90 95 100 98 93 85 103 103

Water Cart 95 99 104 107 102 100 97 91 85 105 111

Drill Rig 98 114 109 110 116 118 122 120 120 127 127

Reversing Beeper (LAMax)1 - - - - - 115 - - - 115 115

Concrete Batching Plant Sources

Truck Slumping 47 64 85 85 92 98 106 94 86 108 107

Conveyor Motor 85 85 86 84 82 77 71 69 64 83 92

Haul Truck (10km/h) 102 105 98 100 90 90 96 98 98 103 109

Front End Loader 77 82 84 90 95 100 98 93 85 103 103

Truck dumping Aggregate 104 100 90 89 92 95 94 96 91 101 107

Cement Delivery 100 113 109 108 108 101 101 97 96 109 116

Dust extraction fan 83 87 91 93 89 86 82 80 73 92 98




Plant Item/Noise Source Frequency Spectra (SWL)

A Lin31.5 63 125 250 500 1k 2k 4k 8k

Soil Manufacturing Sources

Terex Finlay 883+ Mulcher 94 102 97 97 98 93 91 87 81 99 106

Front End Loader 77 82 84 90 95 100 98 93 85 103 103

Truck dumping 104 100 90 89 92 95 94 96 91 101 107

Haul Truck (10km/h) 102 105 98 100 90 90 96 98 98 103 109


1 Includes a + 3 correction for tonality2 Includes a + 3 correction for impulsiveness2 Iterative model runs indicate the dust extraction fan must be limited to an SWL of 92 dB(A)



5.5 Noise Modelling ScenariosGiven the various existing and proposed uses at the development site, several modelling scenarios

have been considered as part of the assessment.

Initial model runs indicated non-compliance for the night period. Through iterative modelling runs

and review of the results, it was indicated that the following sources are the main contributors to the

exceedances:

⚫ Drilling in the quarry;

⚫ Pneumatic cement deliveries to the storage silos; and,

⚫ Truck slumping in the concrete batching plant.

In order to minimise noise impacts and achieve predicted compliance, acoustic barriers shielding

truck slumping are proposed (see Figure 5.3). Where slumping occurs below the hopper/silo fill

points, it may be preferred to enclose the area, rather than construct a barrier along the boundary of

the site. Furthermore, drilling in the quarry must be limited to the Day period (7 am – 6 pm).

Similarly, cement deliveries (pneumatic delivery to the on-site silos) must be restricted to the Day

and Evening periods (7 am to 10 pm).

In addition to the mitigation measures above, it is recommended as a management measure to

restrict any ongoing excavator activities occurring on the western face of the pit during the early

morning period (6 am – 7 am) and programming activities in this area for higher ambient noise

periods (e.g. morning/afternoon peak traffic periods, such as 7 – 9 am and 4 – 6 pm).

The noise modelling scenarios are as follows:

⚫ Scenario 1 – Day Period (7 am – 6 pm) Proposed Quarry Operations and Cumulative Impacts from

Concrete Batching Plant and Existing Operations

⚫ All equipment in Table 5.1 operating continuously including concrete batching plant and

soil manufacturing facility;

⚫ minimum height 3.5 m acoustic barriers shielding truck slumping as shown on

Figures 5.2 and 5.3;

⚫ Dust extraction fan on concrete batching plant limited to a SWL of 92 dB(A);

⚫ 10 haul truck movements/15 min.

⚫ Scenario 2 – Early Morning Period (6 am – 7 am) Proposed Quarry Operations and Cumulative

Impacts from Concrete Batching Plant

⚫ All quarry sources with the exception of drilling as identified in Table 5.1 operating

continuously;

⚫ All concrete batching plant sources occurring simultaneously, no cement deliveries to

the storage silos occurring during this period;





⚫ Dust extraction fan on concrete batching plant limited to a SWL of 92 dB(A);

⚫ 5 haul truck movements/15 min.

⚫ Scenario 3 – Proposed Concrete Batching Plant Only – Evening and Night Period.



⚫ Dust extraction fan limited to a SWL of 92 dB(A);

⚫ Continuous sources: truck slumping, conveyor motor operation and dust extraction fan;

⚫ Variable Noise Sources: haul truck movements, FEL operation, cement deliveries and

truck dumping aggregate (in addition to continuous sources).

It is noted that there is a potential for noise associated with the bagging area and workshop facilities

on Earthworks Pad 2. These may include the use of hand tools, forklifts and compressors. Given the

majority of these sources are located within a building providing shielding from the nearest

receptors, in addition to a large separation distance of over 800 m, any noise impacts are likely to be

negligible in comparison to external plant items. Therefore, the modelling has only considered noise

sources with a potential for off site impacts.

The modelled source locations are presented in Figures 5.2 and 5.3. The noise source data as

presented in Table 5.1 has been adopted in modelling of these sources.



Figure 5.2 - Modelled Quarry Noise Source Locations



Figure 5.3 - Modelled Concrete Batching Noise Plant Sources

5.6 Predicted Noise Results (With Mitigation)Table 5.2 presents the predicted noise levels for the modelling scenarios outlined in Section 5.5.

Noise levels have been predicted at a receptor height of 1.8 m and 4.8 m above ground level for

ground and first floor levels respectively.



Table 5.2 – Predicted Noise Levels – dB(A) – With Mitigation

Receptor

Concrete Batching

Evening/Night Period

Non-Continuous

(LAeq,1hour)

Concrete Batching


Continuous (LAeq,1hour)

Concrete Batching


LA1,1hour)

Concrete Batching


(LA10,1hour)

Quarry Operation

( + Concrete Batching

Plant)

6 am – 7 am (LAeq, adj, 15min)

Quarry Operation

( + Concrete Batching Plant

and Soil Manufacturing)

7 am – 6 pm (LAeq, adj, 15min)

R1 26.7 24.2 25.8 25.3 29.8 37.7

R2 12.5 9.1 10.7 10.2 18.2 25.4

R3 14.5 10.7 14.8 13.4 18.8 27.0

R4 19.5 16.8 21.2 18.5 22.0 35.4

R5 23.9 19.7 26.6 23.4 24.7 38.1

R6 17.1 15.6 21.3 20.2 18.8 27.0

R7 28.9 26.9 30.1 28.2 29.3 35.8

R8 25.6 24.0 26.5 23.4 28.4 32.3

R9 25.9 24.3 25.9 23.1 29.9 35.2

R10 19.5 18.6 20.7 20.6 22.1 27.5

R11 18.9 18.1 19.9 19.8 22.7 26.3

R12 18.0 17.2 19.1 19.0 22.8 27.0

C1 - - - - - 48.1

ResidentialCriteria

Evening: 40 dB(A)Night: 34 dB(A)

Evening: 35 dB(A)Night: 29 dB(A)

Day/Evening: 45 dB(A)

Night: 40 dB(A)

Day/Evening: 40 dB(A)

Night: 35 dB(A)6 am – 7 am: 30 dB(A)

7 am – 6 pm: 45 dB(A),

6 pm – 7 pm: 40 dB(A)

School or Playground: 55dB(A)



5.7 BlastingApproximately 4 to 6 blasts are proposed annually. Any blasting would occur in a fully confined blast

hole, minimising the potential for excessive blast overpressure. Assuming blasting could occur

anywhere within the quarry, the smallest separation distance from the nearest sensitive receptor

could be 420 m. As the quarry progresses south, the distance to the nearest receptor will increase to

750 m.

For predicting air blast overpressure, the following equation has been adopted as referenced in

AS 2187.2-2006 Explosives - Storage and Use of explosives:

P = Ka (R / Q1/3)a

P = pressure (kPa), converted to dB(Linear) using 20*log(P/Po), where Po is the

reference air pressure of 20 mPa.

Q = explosive charge mass (kg)

R = distance from charge (m)

Ka = site constant for confined blast, 10

a = site exponent, -1.45

For predicting vibration levels, the following equation has been adopted:

V = 1140 (R / Q1/2)-1.6

V = peak particle velocity, mm/s

R = distance from charge (m)

Q = maximum instantaneous charge (kg)

The predicted vibration and airblast overpressure levels are presented in Table 5.3 based on various

maximum instantaneous charge rates and blast to receptor distances.



Table 5.3 - Maximum Allowable Charge Mass

Charge

Mass

Distance to Blast (m)

420 m 550 m 650 m 750 m

Vibration Level

(mm/s)

Airblast Overblast

Level (dBL)a

Vibration Level

(mm/s)

Airblast Overblast

Level (dBL)a

Vibration Level

(mm/s)

Airblast Overblast

Level (dBL)a

Vibration Level

(mm/s)

Airblast Overblast

Level (dBL)a

150 kg 4.0 118.9 2.6 115.5 2.0 113.4 1.6 111.6

200 kg 5.0 120.1 3.3 116.8 2.5 114.6 2.0 112.8

250 kg 6.0 121.1 3.9 117.7 3.0 115.6 2.4 113.8

300 kg 6.9 121.9 4.5 118.5 3.5 116.4 2.7 114.5

400 kg 8.7 123.1 5.7 119.7 4.3 117.6 3.5 115.8

500 kg 10.4 124.0 6.8 120.6 5.2 118.5 4.1 116.7

600 kg 12.1 124.8 7.8 121.4 6.0 119.3 4.8 117.5

700 kg 13.7 125.4 8.9 122.0 6.8 119.9 5.4 118.1

Criteria 5 115 dB (9 out of

10 consecutive

blast)

120 dB (any other

blast)

5 115 dB (9 out of

10 consecutive

blast)

120 dB (any other

blast)

5 115 dB (9 out of

10 consecutive

blast)

120 dB (any other

blast)

5 115 dB (9 out of

10 consecutive

blast)

120 dB (any other

blast)

a AS 2187.2 indicates that the site constant (K a ) for confined blasting overpressure predictions commonly varies between 10 to 100. A value of 10 has been adopted and this results in

similar predictions to other literature available on airblast overpressure for confined blasting.



The results of the predictions indicates that compliance with the vibration limit can be achieved with

a Maximum Instantaneous Charge (MIC) of 200 kg or less during the early stages of the quarry

excavation when the distance to the blast are smallest. As the quarry progresses south, the

predicted compliant MIC increases to 600 kg with a distance to blast of 750 m.



6 ConclusionA noise assessment has been undertaken for the proposed quarry and concrete batching operation

at 1944 Bruce Highway, Traveston. Also considered in the assessment are cumulative impacts from

the existing soil manufacturing and composting facility.

Unattended noise monitoring was undertaken at the nearest sensitive receptor with noise levels used

to derive noise criteria for comparison to the relevant Department of Environment and Heritage

Protection criteria.

Computational modelling was undertaken to predict noise levels at the nearest surrounding sensitive

receivers. Based on the predictive noise modelling, compliance at the existing sensitive receptors

(residential and educational) is predicted for the proposed hours of operation provided the following

measures are implemented:

⚫ Dust extraction fan located at the concrete batching plant is limited to a SWL of 92 dB(A).

⚫ Installation of minimum 3.5m high acoustic barriers shielding areas of truck slumping at the

concrete batching plant, as located on Figure 5.3 (potential to enclose area below the hopper/silo

fill point, rather than constructing extensive barriers).

⚫ Restricting pneumatic cement deliveries to on-site storage silos to the Day and Evening periods

(7 am – 10 pm).

⚫ Restricting drilling in the quarry to the Day period (7 am – 6 pm).

⚫ Restricting any ongoing excavator activities occurring on the western face of the pit during the

early morning period (6 am – 7 am) and programming activities in the area for higher ambient

noise periods (e.g. morning/afternoon peak traffic periods).

For blasting activities, compliance with the appropriate noise and vibration criteria is predicted

provided that fully confined blasting is undertaken with a Maximum Instantaneous Charge of 200 kg

with a receptor to blast distance of 420 m. As the quarry progresses further south, the Maximum

Instantaneous Charge can be increased to 600 kg.



Appendix A - Acoustic Glossary



APPENDIX A: GLOSSARY OF ACOUSTIC TERMINOLOGY

A-Weighting A response provided by an electronic circuit which modifies sound in such a way

that the resulting level is similar to that perceived by the human ear.

dB (decibel) This is the scale on which sound pressure level is expressed. It is defined as 20

times the logarithm of the ratio between the root-mean-square pressure of the

sound field and the reference pressure (0.00002N/m2).

dB(A) This is a measure of the overall noise level of sound across the audible spectrum

with a frequency weighting (i.e. ‘A’ weighting) to compensate for the varying

sensitivity of the human ear to sound at different frequencies.

Facade Noise Level Refers to a sound pressure level determined at a point close to an acoustically

reflective surface (in addition to the ground). Typically a distance of 1 metre is

used.

Free Field Refers to a sound pressure level determined at a point away from reflective

surfaces other than the ground with no significant contribution due to sound from

other reflective surfaces; generally as measured outside and away from buildings.

Hertz (Hz) A measure of the frequency of sound. It measures the number of pressure peaks

per second passing a point when a pure tone is present.

LAeq

Equivalent Continuous

Sound Level

This is the equivalent steady sound level in dB(A) containing the same acoustic

energy as the actual fluctuating sound level over the given period. For a steady

sound with small fluctuations, its value is close to the average sound pressure level.

LA90,T This is the dB(A) level exceeded 90% of the time, T.

LA10,T This is the dB(A) level exceeded 10% of the time, T.

LA50, T This is the dB(A) level exceeded 50% of the time, T.

LWA The A-weighted sound power level in dB.



Department Principal: Clayton Hill Project Contact: Tom Manning ABN: 13 609 422 791

Queensland 6 Mayneview Street, Milton Qld 4064 PO Box 1779, Milton BC, Qld 4064 P: +61 7 3871 0411 F: +61 7 3367 3317 South Australia 2/1 First Street, Nuriootpa SA 5355 PO Box 854, Nuriootpa SA 5355 P: +61 8 8562 4158 E: [email protected]

Date: 27/09/2016 Ref: 1948_620_002 Andrew Corbet Corbet’s Group 3 Corbet Road, Gympie Qld 4570

Resources Environment Planning Laboratories www.groundwork.com.au

Attention: Andrew Corbet Dear Andrew STORMWATER IMPACT ASSESSMENT – TRAVESTON QUARRY (LOT 520 SP263809) HYDROLOGIC AND HYDRAULIC MODELLING RESULTS Please find enclosed our results from a review of the existing and developed stormwater conditions for the Corbet Traveston Quarry impacting on state controlled cross drainage infrastructure. The stormwater assessment includes the following items:

Existing and developed case catchment delineation;

Hydrologic and hydraulic modelling of the existing stormwater system;

Hydrologic and hydraulic modelling of the stormwater system incorporating the proposed layout;

Assessment of proposed layout on existing state controlled stormwater infrastructure; and

Recommendations of proposed additional measures if required. Should you have any queries please feel free to contact me on 07 3871 0411 or via email [email protected] at anytime to discuss. Yours faithfully

Mark Folker RPEQ 17269 Groundwork Plus Senior Environmental Engineer

This document is uncontrolled when printed. 2

1948_620_002 GROUNDWORK p l u s

STORMWATER MANAGEMENT REVIEW RESULTS

1. EXISTING STORMWATER CATCHMENT REVIEW Refer to Figure 1 – Existing Catchment Assessment for Traveston Quarry below for a catchment assessment, based on survey captured in May 2016. Refer to Attachment 1 – Existing Catchment Plan for further details.

Figure 1 – Existing Catchment Assessment for Traveston Quarry Currently, three (3) catchments report to two (2) discharge points on Mary Valley Link Road, conveying flow south through two (2) culvert banks (1x900mm RCP and 3x1500mm RCP). Majority of the site comprises of clean water catchments, however an existing borrow pit directs flow to two (2) sediment basins (total volume = 3,500m3) where water is treated before discharging to the existing clean water catchment and ultimately off site. Catchment details are as shown in Table 1 – Existing Catchment Details.

Table 1 – Existing Catchment Details

ID Catchment Area (ha)

Dirty / Clean Discharge Point

Catchment 1 7.39 Clean / Dirty Catchment 3 via existing 3,500m3 sediment basin

Catchment 2 4.67 Clean Mary Valley Link Road 1 x 900mm RCP culvert

Catchment 3 7.20 Clean Mary Valley Link Road 3x1500mm RCP culverts

C1C

EXISTING SEDIMENT BASINS

C2

C3

EXISTING 3x1500mm

RCP CULVERT EXISTING 1x900mm

RCP CULVERT

This document is uncontrolled when printed.

1948.620.000 GROUNDWORK p l u s

2. HYDROLOGIC / HYDRAULIC MODELLING In order to analyse the existing stormwater catchment conditions, hydrologic/hydraulic modelling was undertaken using DRAINS (a computer simulation program by Watercom). Site-based rainfall polynomial coefficients were obtained using the Intensity-Frequency-Duration (IFD) generation tool, available on the Bureau of Meteorology's website. A 1% AEP (Annual Exceedance Probability) design storm was utilised in DRAINS in accordance PO1 of the Department of Infrastructure, Local Government and Planning Stormwater and drainage impacts on state infrastructure state code. An existing case schematic was designed as shown in Figure 2 – DRAINS Schematic of Existing Stormwater Catchments.

Figure 2 – DRAINS Schematic of Existing Stormwater Catchments

3. PROPOSED DEVELOPMENT It is proposed to use typical quarrying methodologies such as drill and blast to extract material throughout several stages from existing levels down to approximately RL55.0m AHD. All runoff generated from within the quarry extents will be directed to a quarry sump where it will either be treated and removed off site or captured and reused on site for dust suppression. Refer to Attachment 2 – Proposed Catchment Plan for details on the proposed quarry extents.

4. IMPACT ASSESSMENT A hydrologic and hydraulic model was created to assess the impacts of the quarry extents on the existing stormwater infrastructure traversing Mary Valley Link Road. A 1% AEP (Annual Exceedance Probability) design storm was utilised in DRAINS in accordance PO1 of the Department of Infrastructure, Local Government and Planning Stormwater and drainage impacts on state infrastructure state code. A developed case schematic was designed as shown in Figure 3 – DRAINS Schematic of Developed Stormwater Catchments.

C1C

C2

C3C

3x1500mm RCP CULVERT

1x900mm RCP CULVERT

SEDIMENT BASIN 1

SEDIMENT BASIN 2



Figure 3 – DRAINS Schematic of Proposed Stormwater Catchments

5. RESULTS Due to the quarry pit excavation the contributing catchments impacting on the existing stormwater infrastructure have been reduced, therefore reducing the peak flow reporting to these structures. Refer to Table 2 – Peak Discharge Impact Assessment below for a summary of the flow reductions reporting the structures on Mary Valley Link Road.

Table 2 – Peak Discharge Impact Assessment

Structure ID Existing

Contributing Catchment Area (Ha)

Proposed Contributing

Catchment Area (Ha)

Existing Inflow (m3/s)

Proposed Inflow (m3/s)

Difference (m3/s)

1x900mm RCP 4.67 3.96 2.53 2.14 -0.39

3x1500mm RCP 14.59 6.45 4.295 3.17 -1.125

6. CONCLUSION This assessment has investigated the potential impacts of the proposed extractive industry activities of the Traveston Quarry on downstream existing stormwater infrastructure contained within a state controlled road corridor. Based on this assessment it can be concluded that the proposed extractive industry development will reduce existing peak flows impacting on the cross drainage infrastructure conveying flow under Mary Valley Link Road and complies with PO1 of the Department of Infrastructure, Local Government and Planning Stormwater and drainage impacts on state infrastructure state code.

SEDIMENT BASIN 1

SEDIMENT BASIN 2

QUARRY

QUARRY SUMP

C3C

C2

1x900mm RCP CULVERT

3x1500mm RCP CULVERT


1948_620_002 GROUNDWORK p l u s

Attachment 1

Existing Catchment Plan

Site Boundary - Dirty Water Flow Direction

--- Cadastral Boundary - Clean Water Flow Direc]on - - - Catchment Boundary

GROU,NDWOR Corbet Quarries 1

P r u s -DC- Diversion Channel P H : + 6 1 7 387 1 0 4 1 1

Vl\11111 .



Attachment 2

Proposed Catchment Plan

Site Boundary

--- Cadastral Boundary - - - Catchment Boundary -DC- Diversion Channel

- Dirty Water Flow Direction

- Clean Water Flow Direc]on

RPl Surface Water Release Point GROU,NDWOR

Corbet Quarries 1 P r u s

P H : + 6 1 7 387 1 0 4 1 1 VI \IIIII

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