APPLICATION FOR WORKS APPROVAL Limestone Crushing and

APPLICATION FOR WORKS APPROVAL

Limestone Crushing and Screening Premises Lot 8 Wattle Avenue, Nowergup

Prepared by:

RPS

38 Station Street, SUBIACO WA 6008

PO Box 465, SUBIACO WA 6904

T: 618 9211 1111

F: 618 9211 1122

E: [email protected]

W: www.rpsgroup.com.au

Report No: 3780

Version/Date: FinalA

Prepared for:

URBAN RESOURCES PTY LTD

Unit 4, 127 Melville Parade, COMO WA 6152

RPS Environment and Planning Pty Ltd (ABN 45 108 680 977)

Limestone Crushing and Screening Premises, Lot 8 Wattle Ave Nowergup

3780, FinalA DOCUMENT STATUS / DISCLAIMER

Document Status

Version Purpose of Document Orig Review Review Date

Format Review

RPS Release Approval

Issue Date

Draft A Draft for Client Review SV Client 18.05.11

FinalA Final for Issue SV MZ 24.05.11 25.05.11 25.05.11 25.05.11

Disclaimer

This document is and shall remain the property of RPS. The document may only be used for the purposes for which it was

commissioned and in accordance with the Terms of Engagement for the commission. Unauthorised copying or use of this

document in any form whatsoever is prohibited.


3780, FinalA Page 1

TABLE OF CONTENTS Page

1.0 INTRODUCTION ....................................................................................... 2

2.0 SUBJECT SITE ............................................................................................. 3

2.1 Location and Ownership ....................................................................................... 3

2.2 Current Approvals ................................................................................................. 3

2.3 Surrounding Land Uses and Sensitive Receptors ............................................... 3

3.0 DESCRIPTION OF PROPOSED PREMISES ............................................ 4

3.1 Machinery/Equipment ........................................................................................... 4

3.2 Throughput Volumes ............................................................................................ 4

3.3 Prescribed Categories ........................................................................................... 5

3.4 Hours of Operation ............................................................................................... 5

4.0 IDENTIFICATION AND MANAGEMENT OF POTENTIAL

ENVIRONMENTAL IMPACTS .................................................................. 6

4.1 Noise ....................................................................................................................... 6

4.2 Dust ......................................................................................................................... 6

5.0 CONCLUSION ............................................................................................ 8

APPENDICES

APPENDIX 1 Certificate of Title

APPENDIX 2 Proof of Lease Arrangement

APPENDIX 3 Current Planning and Environmental Approvals

APPENDIX 4 Equipment Diagram

APPENDIX 5 Noise Impact Assessment

APPENDIX 6 Dust Management Plan and Incident Report Form


3780, FinalA Page 2

1.0 INTRODUCTION

On behalf of our client, Urban Resources Pty Ltd, RPS is seeking a Works Approval from the

Department of Environment and Conservation for a limestone crushing and screening premises

on Lot 8 Wattle Avenue, Nowergup. This application is submitted further to an Application

Enquiry lodged with the DEC in February 2011 and a subsequent Scoping Meeting held with DEC

Officers at their Booragoon Office on 21 March 2011.

City of Wanneroo and WA Planning Commission planning approvals, along with a local Extractive

Industries Licence, have previously been obtained for the site, and our client has been advised that

a works approval is now required for the proposed crushing and screening operation. The

proposed operation is understood to fall within Category 12 of Prescribed Premises Schedule 1 of

the Environmental Protection Regulations 1987.

The following report provides information on the following matters in support of the works

approval application (as requested by DEC officers at the recent Scoping Meeting):

A description of the site, its location, ownership and operational arrangements.

Background information on previously obtained approvals and licences.

A description of the proposed premises, including equipment details, throughput volumes,

hours of operation, and potential environmental impacts.

Management measures in place to minimise/mitigate any potential off-site impacts.


3780, FinalA Page 3

2.0 SUBJECT SITE

2.1 Location and Ownership

The location of the proposed crushing and screening premises is within the current DEC clearing

permit area of Lot 8 (No. 259) Wattle Ave, Nowergup (refer Figure 1 over the page). The

proposed premises location comprises an active quarry area of approximately 10ha located in the

northernmost section of Lot 8 Wattle Avenue. This application does not apply to any other part

of Lot 8 Wattle Avenue, which is subject to separate environmental (clearing) approvals prior to

any additional quarrying activity.

The subject land is a portion of the land formally described Lot 8 on Diagram 53380, depicted on

Volume 2132, Folio 850 – a Certificate of Title is provided at Appendix 1. Urban Resources Pty

Ltd are the operator of the existing quarry operation under lease agreement with the landowner,

Oakford Land Company Pty Ltd. Proof of the lease arrangement is provided at Appendix 2.

Urban Resources Pty Ltd is a privately owned, local business. The company commenced trading

in August 2006 and its main business is the mining of sand and limestone for use in the Perth

metropolitan construction industry. Their products service a range of companies from large

entities to distributors to the home building industry for sand products. Filling sand is also

supplied to contracting companies in residential developments or directly to developers. Stephen

Elliot is the sole director of Urban Resources.

2.2 Current Approvals

City of Wanneroo and WA Planning Commission planning approvals, a DEC Clearing Permit and

a local Extractive Industries Licence have previously been obtained for the site (with the

Extractive Industries Licence currently in the process of being renewed by the City of

Wanneroo). The mobile equipment to be used for crushing and screening operations has

previously been granted an Environmental Protection Act 1986 Licence valid to August 2012.

Copies of all relevant documentation/approvals are provided at Appendix 3.

2.3 Surrounding Land Uses and Sensitive Receptors

Lot 8 Wattle Avenue is bounded to the west by market garden and quarry activities, to the south

by zoned but vacant MRS Industrial land (immediately across Wattle Avenue), to the east by

quarrying and portions of a Bush Forever site and to the north east by an existing Water

Corporation reserve that will contain a water storage tank in the future. There are many other

existing and exhausted limestone quarries in the vicinity. A bush forever site is located in the

south eastern corner of Lot 8 Wattle Avenue (approximately 500-600m away).

The closest sensitive receptor (i.e. a land use that is potentially sensitive to the operation of

prescribed premises such as a quarry) is a residential dwelling located at Lot 2 Wattle

Avenue/Dayrell Road, approximately 650-700m directly west of the quarry site (refer Figure 1).

Another residential dwelling is also located on Lot 2, approximately 700-750m to the south west

of the quarry site. It is important to note, however, that these dwellings are only 450m and 150m

away (respectively) from an existing limestone quarry located within Lot 2, which is much closer

than the quarry on Lot 8.

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not permitted. Please contact the author.

Unauthorised reproduction or amendment

+61 8 9211 1111

+61 8 9211 1122

Subiaco WA 6008

38 Station Street

ACN 108 680 977

ABN 45 108 680 977

T

F

W

RPS Environment and Planning Pty Ltd

rpsgroup.com.au

' COPYRIGHT PROTECTS THIS PLAN

PO Box 465 Subiaco WA 6904

Subject Site

CHECKED

DRAWN

PLANNER

REVISION

PLAN No

DATE

SCALE

CLIENT

:

:

:

:

:

:

:

:

LEGEND

WATTLE

ROAD

AVENUE

DAYRELL

50 100 150 200 250m

only and are subject to detailed engineering design.

All carriageways are shown for illustrative purposes

Areas and dimensions shown are subject to final survey calculations.

Accuracy +/- 4m. Projection MGA Zone 50.

Aerial Photography dated January 2010.

Base data supplied by Landgate.

PROPOSED PREMISES LOCATION

Lot 8 Wattle Avenue, NOWERGUP

FI

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L.W.

S.V.

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3780-5-001.dgn

17 May 2011

1:5,000@A3

Urban Resources Pty. Ltd.

Location of Proposed Premises

Closest sensitive receptors

Closest sensitive receptors


3780, FinalA Page 4

3.0 DESCRIPTION OF PROPOSED PREMISES

3.1 Machinery/Equipment

The proposed works approval is for the operation of a crushing and screening plant for limestone

products including, but not limited to, 75mm road base, 25mm, 19mm, 14mm aggregate and -

5mm aglime. The crushing and screening process is generally described as follows:

Limestone raw feed (excavated from the quarry site) is fed into the feed hopper of the

jaw crusher.

The resulting product fed to the screening plant where oversize materials are recycled

through the Pegson impact crusher, then fed back over the screening plant.

This product is then stockpiled via the conveyor and further manual stockpiling is carried

out by the second front end loader.

All material fed into the process is eventually ground to the required size, therefore no

waste material is generated by the process.

In simple terms, process inputs comprise of limestone raw feed, with process outputs being

crushed limestone products of variable size/grain.

The plant is track mounted and portable, and it is envisaged that it will work at a range of sites

within and around the Perth metropolitan area (with the appropriate works approvals/licences

where required). The plant consists of the following items:

Striker JM11-80 Jaw Crusher.

Pegson 428 Impact Crusher.

Finlay 694 Screening Plant.

Striker 18M stockpiling conveyor.

The plants are all diesel driven but are fuelled by way of a mobile tanker (mini tankers) so there is

no fuel stored on site. A diagram illustrating the general arrangement of the plant equipment is

provided at Appendix 4.

No water license/bore is required for the crushing and screening works. The only water required

on site is delivered via water carts (and other bores in the area by agreement if required) for dust

suppression purposes – this is already being carried out as part of existing quarry operations.

3.2 Throughput Volumes

The plant has a throughput rate of 100 and 250 tonnes per hour depending on the fineness of the

product being made, and therefore likely to exceed 50,000 tonnes per annum.

As previously noted, the plant is mobile and is utilised elsewhere when not being used at Wattle

Avenue (subject to DEC Works Approvals where required). It is expected that the plant will be


3780, FinalA Page 5

on site for around the 162 days (approximately 60%) of the year. This will be mainly April

through to November as the operator has other commitments with the machinery in the summer

months.

Table 1: Crushing and Screening Throughputs for Lot 8 Wattle Avenue Limestone Quarry

Product Throughput

(Tonnes/hr)

Estimated Volume

(Tonnes)

Period on Site

(in days)

75 mm Limestone 250 70,000 35

20mm limestone 175 80,000 57

Ag Lime 90 50,000 69

TOTAL

200,000 162

3.3 Prescribed Categories

Given the anticipated throughput rates as outlined above, it is understood that the proposed

limestone crushing and screening premises falls within Category 12 of Prescribed Premises

Schedule 1 of the Environmental Protection Regulations 1987. On this basis, and as confirmed at

the recent Scoping Meeting, a DEC works approval is therefore required for the premises.

3.4 Hours of Operation

Quarry operations are limited by condition of the City of Wanneroo Extractive Industries Licence

to the following hours:

06:30 – 18:00 Monday to Friday (except Public Holidays).

07:00 – 17:00 Saturday.

No work permitted on Sunday or Public Holidays.

Given the ancillary nature of the proposed premises, and accounting for operational start up and

shut down times, the proposed limestone crushing and screening premises will be limited to a

smaller operating window than the quarry itself.


3780, FinalA Page 6

4.0 IDENTIFICATION AND MANAGEMENT OF POTENTIAL

ENVIRONMENTAL IMPACTS

If not adequately managed, dust and noise have the potential to impact on sensitive environmental

and social receptors, including nearby residents. There are no other potential off-site

environmental impacts associated with the proposed premises.

It is also important to note that the crushing and screening premises are incidental to the

approved quarry operation, which is subject to detailed consideration of all operational quarry

matters and potential impacts (including noise and dust). Public consultation was also carried out

as part of local approvals processes. A detailed site management plan is in place for the quarry

site, and sets out a range of management actions to mitigate environmental impacts.

The following provides a summary of potential environmental impacts associated with the

proposed premises and proposed management measures to be implemented.

4.1 Noise

Site noise associated with the existing quarry operation is actively managed in accordance with

the approved Excavation and Rehabilitation Management Plan for the site, primarily by way of

maintaining adequate buffers, screens and the location of noise generating equipment on the pit

floor below natural ground level (once at suitable depth). All machinery is to be maintained in

good condition with efficient mufflers and noise shielding.

With regard to the proposed limestone crushing and screening premises, specialist acoustic

consultants were engaged (as recommended by DEC officers in the recent Scoping Meeting) to

assess premises noise levels against the prescribed standards of the Environmental Protection (Noise)

Regulations 1997. The full Noise Impact Assessment report is provided at Appendix 5, and

concludes that compliance with the daytime LA10 assigned noise level under the regulations is

achieved at all nearby residential receivers.

4.2 Dust

Dust generation is a potential effect of limestone quarrying and crushing/screening operations, and

if left unmanaged can create significant nuisance problems for local residents and businesses. Both

the site owner and operator are aware of the need to control and minimise dust emissions, and

are committed to pro-active and ongoing management actions to minimise any potential

disturbances.

Site operations are being carried out in accordance with a comprehensive dust management

regime as approved by the City of Wanneroo as part of the local planning and licensing process

(refer Appendix 6). Dust is primarily controlled by way of site watering and the application of

hydromulch and gluon to stabilise exposed areas. Access roads are also treated with Dustex to

minimise dust generated by vehicle/machinery movements.

The quarry operator has set up a register of dust complaints (see attached Dust Incident Form

included in Appendix 6) and has actively responded to (and addressed) previous complaints

directed through the City of Wanneroo. The register is kept at the operator’s main office rather


3780, FinalA Page 7

than on-site given that complaints have previously been received by phone and email, rather than

directly to operators on site.

Following the receipt of dust complaints in January/February 2011, the following dust management

regime has been imposed, in addition to those actions already committed to in the Site

Rehabilitation and Management Plan:

a) All open areas of the site have been either hydromulched or treated with gluon to

stabilize the unworked areas of the site.

b) The unsealed access road has been extensively treated with Dustex and all watering of

the road now contains supplementary amounts of Dustex to keep the roads from creating

further dust.

c) The gluon is reapplied on a regular basis to stockpiles during the summer months to

prevent a reoccurrence of the previous complaints.

d) The working faces are being sprayed with water prior to crushing or screening to

minimize dust from the actual mining process.

e) Dust control has been reinforced as a priority with the operators and work will cease if

the actual operation is causing dust (consistent with the dust management actions set out

in the Site Management Plan). Watering of the road access and open areas has also been

prioritized with the operator and supervisor.

f) It is anticipated that by the end of the 2012 all operations and major stockpiles will be

located on the quarry floor (progressively being mined) rather than as now stockpiled on

the top of the site. It is not possible to do this until the quarry is sufficiently established.

g) The site operator has also endeavored to get the adjoining landowner to contact them

directly if there are dust issues, as this will help to speed up the response time to any

problems. However, at this stage it appears that the adjoining landowner prefers to send

complaints via the Shire, which often results in a delay before the operator is contacted.

The site operator has, however, responded actively to those complaints received and

believes the situation is now under control.

h) The site is being actively monitored for any signs of dust nuisance since these additional

actions have been taken.

i) There have been no complaints since the introduction of these measures.

This dust management regime will continue to be enforced and actively monitored throughout the

operation of the limestone crushing and screening premises. Furthermore, as previously noted,

the crushing and screening equipment will only be located on site between the months of April

and November, as the operator has other commitments with the machinery in the summer

months. Given the location of the nearest sensitive receptors to the west/southwest of the site,

and that easterly breezes are generally limited to summer months, it is unlikely that any additional

dust issues will be created by the proposed crushing and screening premises.


3780, FinalA Page 8

5.0 CONCLUSION

This report has been submitted on behalf of our client, Urban Resources Pty Ltd, in support of an

application for a DEC Works Approval for a limestone crushing and screening premises at Lot 8

Wattle Avenue, Nowergup. It provides detailed information on the proposed premises and

potential environmental impacts, along with details of management actions to minimise any

potential disturbance to local sensitive receptors.

The proposed crushing and screening operation is ancillary to the existing quarry operation

already present on site, and it has been demonstrated to present no significant additional risk to

the locality in terms of potential noise and dust generation impacts. In light of these findings, it is

respectfully requested that the DEC grant a Works Approval for the premises at the earliest

opportunity.

rp 3780 works approval application 260511

APPENDIX 1

Certificate of Title

APPENDIX 2

Proof of Lease Arrangement

APPENDIX 3

Current Planning and

Environmental Approvals

APPENDIX 4

Equipment Diagram

APPENDIX 5

Noise Impact Assessment

Noise Impact Assessment

Prepared For

Urban Resources Pty Ltd

May 2011

Reference: 11041826-01b

Lot 8 Wattle Avenue, Nowergup Limestone Crushing Operations

GEORGE

LLOYD

Acoustics

Report: 11041826-01b

Lloyd George Acoustics Pty Ltd ABN: 79 125 812 544

PO Box 717 Hillarys WA 6923

Offices: Ocean Reef Padbury Scarborough Waterford

Phone: Fax:

Email: Mobile:

9300 4188 9300 4199 [email protected]

0439 032 844

9401 7770 9401 7770 [email protected]

0400 414 197

9245 3223 9300 4199 [email protected]

0438 201 071

9313 3655 9300 4199 [email protected]

0427 388 876

Member of the Association of Australian Acoustical Consultants – (AAAC)

Approved for Issue: Rebecca Donovan

Position: Project Director

Verified Terry George

Date: 26 May 2011

This report has been prepared in accordance with the scope of services described in the contract or agreement between Lloyd George Acoustics Pty Ltd and the Client. The report relies upon data, surveys, measurements and results taken at or under the particular times and conditions specified herein. Any findings, conclusions or recommendations only apply to the aforementioned

circumstances and no greater reliance should be assumed or drawn by the Client. Furthermore, the report has been prepared solely for use by the Client, and Lloyd George Acoustics Pty Ltd accepts no responsibility for its use by other parties.

mailto:[email protected]



Lloyd George Acoustics

CONTENTS

1 INTRODUCTION ................................................................................................................ 1

2 CRITERIA ........................................................................................................................... 2

3 METHODOLOGY ............................................................................................................... 3

3.1 Site Measurements ..................................................................................................... 3

3.2 Noise Modelling ........................................................................................................... 3

3.2.1 Meteorological Information .................................................................................. 4

3.2.2 Topographical Data.............................................................................................. 4

3.2.3 Ground Absorption ............................................................................................... 4

3.2.4 Source Sound Levels ........................................................................................... 5

3.2.5 Modelling Scenario .............................................................................................. 5

4 RESULTS ........................................................................................................................... 5

5 DISCUSSION...................................................................................................................... 7

6 CONCLUSION .................................................................................................................... 8

APPENDICES

A Terminology


Reference: 11041826-01b Page 1

1 INTRODUCTION

RPS on behalf of Urban Resources Pty Ltd commissioned Lloyd George Acoustics to complete a noise impact assessment of a proposed quarry site located at Lot 8 Wattle Avenue, Nowergup. The site is located approximately 700m to the nearest residential premises. The City of Wanneroo have requested that this assessment be conducted in accordance with the Environmental Protection (Noise) Regulations 1997, to determine if the activities are compliant during all hours of operation. The site locality and surrounding premises are shown in Figure 1.1.

Figure 1.1: Site Locality and Surroundings

Plant to be used on the site is relatively new and well maintained, and comprises:

Striker Jaw Crusher;

Pegson 428 Impact Crusher;

Finlay Screening Plant; and

Striker Stockpiling Conveyor.

The general site operation is as follows:

Raw limestone is fed into the jaw crusher;

The product is then fed into the screening plant where any oversized material is recycled through the Pegson impact crusher, then re-fed into the screening plant.

R1

R2

R3

R4

R5

R6

Assumed Plant Location



The product is then stockpiled via the conveyor and further manual stockpiling occurs.

The hours of operation have been assumed to be 7.00am to 6:00pm Monday to Saturday. It is understood that quarrying has already commenced on the site. The purpose of this report is to assess the impact of the crushing and screening plant only.

Appendix A contains a description of some of the terminology used throughout this report.

2 CRITERIA

Environmental noise in Western Australia is governed by the Environmental Protection Act 1986, through the Environmental Protection (Noise) Regulations 1997 (the Regulations).

Regulation 7 defines the prescribed standard for noise emissions as follows:

“7. (1) Noise emitted from any premises or public place when received at other premises –

(a) Must not cause or significantly contribute to, a level of noise which exceeds the assigned level in respect of noise received at premises of that kind; and

(b) Must be free of –

i. Tonality;

ii. Impulsiveness; and

iii. Modulation”.

A “…noise emission is taken to significantly contribute to a level of noise if the noise emission exceeds a value which is 5dB below the assigned level…”

Tonality, impulsiveness and modulation are defined in Regulation 9. Noise is to be taken to be free of these characteristics if:

(a) The characteristics cannot be reasonably and practicably removed by techniques other than attenuating the overall level of noise emission; and

(b) The noise emission complies with the standard after the adjustments of Table 2.1 are made to the noise emission as measured at the point of reception.

Table 2.1 – Adjustments For Intrusive Characteristics

Tonality Modulation Impulsiveness

+ 5dB + 5dB + 10dB

Note: The above are cumulative to a maximum of 15dB.

The assigned levels including the influencing factor (prescribed standards) are specified in Regulation 8 and are shown below in Table 2.2. Six assessment locations have been



selected as shown on Figure 1.1. The influencing factor has been determined to be zero at all six nearby residences.

Table 2.2 –Assigned Noise Levels

Premises Receiving Noise Time Of Day

Assigned Level (dB)

LA10 LA1 LAmax

Noise Sensitive

0700 to 1900 hours Monday to Saturday (Day) 45 55 65

0900 to 1900 hours Sunday and public holidays (Sunday) 40 50 65

1900 to 2200 hours all days (Evening) 40 50 55

2200 hours on any day to 0700 hours Monday to Saturday and 0900 hours Sunday and public holidays (Night)

35 45 55

3 METHODOLOGY

3.1 Site Measurements Under the Regulations, there are certain requirements that must be satisfied when undertaking measurements and are defined in Regulations 19, 20, 22 and 23 and Schedule 4. In undertaking the measurements, these have been satisfied, specifically noting the following:

The sound level meter used was a Rion NA 28 (S/N: 01270693), which holds current laboratory certificates of calibration available upon request and was field calibrated before and after the measurements and found to be within +/- 0.5 dB. This meter simultaneously records the slow and fast time weighted sound levels allowing relevant data to be collected. The microphone was fitted with a standard wind screen with winds being less than 5m/s;

The microphone was at least 1.2 metres above ground level and at least 3.0 metres from reflecting facades (other than the ground plane) and as such no adjustments have been applied for reflected noise;

Measurements of individual sources were recorded on 27 April 2011 between 12pm and 2pm.

3.2 Noise Modelling To determine the noise emissions from the subject site, the computer modelling programme SoundPlan 7.0 has been utilised. The programme was selected to use the CONCAWE algorithms, which requires the following input data:



Meteorological Information;

Topographical data;

Ground Absorption; and

Source sound power levels.

3.2.1 Meteorological Information

Meteorological information utilised is based on that specified in EPA Guidance for the Assessment of Environmental Factors No.8 Environmental Noise draft, and are shown below in Table 3.1.

Table 3.1 –Modelling Meteorological Conditions

Parameter Day (0700-1900)

Temperature (oC) 20

Humidity (%) 50

Wind Speed (m/s) 4

Wind Direction All & Prevailing

Pasquil Stability Factor E

Note that the above conditions approximate the typical worst-case for enhancement of sound propagation. The EPA policy is that compliance with the assigned noise levels needs to be demonstrated for 98% of the time, during the day and night periods, for the month of the year in which the worst-case weather conditions prevail. In most cases, the above conditions occur for more than 2% of the time and therefore must be satisfied.

At wind speeds greater than those shown above, sound propagation may be further enhanced, however background noise from the wind itself and from local vegetation is likely to be elevated and dominate the ambient noise levels.

3.2.2 Topographical Data

Topographical data was provided by RPS and is at 5-metre intervals.

3.2.3 Ground Absorption

Ground absorption varies from a value of 0 to 1, with 0 being for an acoustically reflective ground (e.g. water or bitumen) and 1 for acoustically absorbent ground (e.g. grass). In this instance, a value of 0.80 has been used for the surroundings, and 0.20 has been used for the quarry.



3.2.4 Source Sound Levels

Table 3.2 shows the sound power levels used in the modelling. These have been determined based on the onsite measurements of each item of plant. The front end loader operation currently has not been considered in this assessment as it already operates on the site.

Table 3.2 – Source Sound Power Levels, dB

Description Octave Band Centre Frequency (Hz) Overall

dB(A) 63 125 250 500 1k 2k 4k 8k

Impact Crusher 112 111 115

106 108 111

104 105 107

105 104 104

102 102 102

100 99 97

97 95 91

89 87 82

112

Jaw Crusher 90 95 95

102 93 94

96 87 88

92 92 89

89 88 90

87 86 84

82 81 79

76 76 73

98

Screening Plant 89 92 92

98 92 90

90 84 84

89 90 87

87 85 85

85 85 85

84 83 81

79 76 73

97

3.2.5 Modelling Scenario

To represent a worst case scenario, the modelling has assumed that the plant is operating in the north western portion of the site, as shown on Figure 1.1. Owing to the nature of the noise associated with the plant it is considered to be present for more than 10% of the time; hence, it is the LA10 criteria that must be satisfied. The assumed noise source height is 2 metres above the ground level as provided by RPS.

4 RESULTS

The predicted noise levels, including source noise ranking and compliance with noise limit are presented in Tables 4.1 and 4.2. Two scenarios have been modelled, Scenario 1, shown in Table 4.1, predicts the noise associated with the site at the pre-quarrying ground heights. Quarrying works have already commenced on the site, therefore the pre-quarrying ground height used in the modelling has been completed to provide an absolute worst case scenario. The existing ground height is currently lower than the pre-quarrying height, but is not yet at the finished ground height. Scenario 2, shown in Table 4.2, predicts the noise at the finished ground heights based on the plans provided by RPS.



Table 4.1: Scenario 1 Predicted Noise Levels and Noise Source Ranking at Pre-Quarrying Ground Heights

Receiver Predicted

Noise Level LA10 dB

Noise Source Ranking Adjustments (Table 2.1)

Adjusted Noise Level

LA10 dB Comment

RL1 42 Impact crusher = 42 dB(A) Screening plant = 24 dB(A) Jaw crusher = 20 dB(A)

5 47 Exceeds daytime assigned level by 2 dB.


5 41 Complies with daytime assigned level.


5 46 Exceeds daytime assigned level by 1 dB.







The predicted operations based on the pre-quarrying ground heights across the site may exceed the assigned noise level under worst case weather conditions by up to 2 dB at the existing residential location (RL1) to the west of the site. This 2dB exceedance is manageable by stockpiling within 20 metres of the crushing and screening area, so that the equipment is located on the east side of the stockpile.

Note that a 2 dB exceedance is considered fairly negligible given that the calculations assume downwind conditions, include all equipment operating simultaneously and include the tonality adjustment.



Table 4.2: Predicted Noise Levels and Noise Source Ranking at Finished Ground Heights

Receiver Predicted

Noise Level LA10 dB

Noise Source Ranking Adjustments (Table 2.1)

Adjusted Noise Level

LA10 dB Comment













5 DISCUSSION

The methodology of the modelling was such that the equipment was located toward the north western portion of the site, considered to represent a worst-case scenario. The predictions were divided into two scenarios, Scenario 1 being at the pre-quarrying ground heights, while Scenario 2 represented the finished ground heights of the proposed quarry. The results presented in Tables 4.1 and 4.2 are considered generally representative of the noise emissions from the site.

The results show that the Regulations are exceeded at two locations for Scenario 1. As discussed, the ground heights across the site are already significantly lower than the pre-quarrying heights, therefore it is considered that the exceedance of 2dB(A) is negligible, however, it is recommended that the following noise management techniques be adhered to:

Working hours to be restricted to 7.00am to 6.00pm Monday to Saturday.

Ensure roads within the site are well maintained; and

Stockpile within 20 metres of the plant facing the residents wherever practicable.

The results show that the predicted noise levels comply with the daytime assigned levels at all residential receivers at the finished ground heights.



6 CONCLUSION

The results of the noise predictions show that the crushing and screening plant complies with the daytime LA10 assigned level under the Environmental Protection (Noise) Regulations 1997 at finished ground heights.

With the inclusion of the noise management techniques, detailed in Section 4 and summarised in Section 5, compliance with the Regulations can be achieved at all ground heights.


APPENDIX A

Terminology


Reference: 11041826-01b Page A1

The following is an explanation of the terminology used throughout this report.

Decibel (dB)

The decibel is the unit that describes the sound pressure and sound power levels of a noise source. It is a logarithmic scale referenced to the threshold of hearing.

A-Weighting

An A-weighted noise level has been filtered in such a way as to represent the way in which the human ear perceives sound. This weighting reflects the fact that the human ear is not as sensitive to lower frequencies as it is to higher frequencies. An A-weighted sound level is described as LA dB.

Sound Power Level (Lw) Under normal conditions, a given sound source will radiate the same amount of energy, irrespective of its surroundings, being the sound power level. This is similar to a 1kW electric heater always radiating 1kW of heat. The sound power level of a noise source cannot be directly measured using a sound level meter but is calculated based on measured sound pressure levels at known distances. Noise modelling incorporates source sound power levels as part of the input data.

Sound Pressure Level (Lp) The sound pressure level of a noise source is dependent upon its surroundings, being influenced by distance, ground absorption, topography, meteorological conditions etc and is what the human ear actually hears. Using the electric heater analogy above, the heat will vary depending upon where the heater is located, just as the sound pressure level will vary depending on the surroundings. Noise modelling predicts the sound pressure level from the sound power levels taking into account ground absorption, barrier effects, distance etc.

LASlow This is the noise level in decibels, obtained using the A frequency weighting and the S time weighting as specified in AS1259.1-1990. Unless assessing modulation, all measurements use the slow time weighting characteristic.

LAFast This is the noise level in decibels, obtained using the A frequency weighting and the F time weighting as specified in AS1259.1-1990. This is used when assessing the presence of modulation only.

LAPeak This is the maximum reading in decibels using the A frequency weighting and P time weighting AS1259.1-1990.

LAmax An LAmax level is the maximum A-weighted noise level during a particular measurement.

LA1

An LA1 level is the A-weighted noise level which is exceeded for one percent of the measurement period and is considered to represent the average of the maximum noise levels measured.



LA10 An LA10 level is the A-weighted noise level which is exceeded for 10 percent of the measurement period and is considered to represent the “intrusive” noise level.

LAeq The equivalent steady state A-weighted sound level (“equal energy”) in decibels which, in a specified time period, contains the same acoustic energy as the time-varying level during the same period. It is considered to represent the “average” noise level.

LA90 An LA90 level is the A-weighted noise level which is exceeded for 90 percent of the measurement period and is considered to represent the “background” noise level.

One-Third-Octave Band Means a band of frequencies spanning one-third of an octave and having a centre frequency between 25 Hz and 20 000 Hz inclusive.

LAmax assigned level Means an assigned level which, measured as a LA Slow value, is not to be exceeded at any time. LA1 assigned level Means an assigned level which, measured as a LA Slow value, is not to be exceeded for more than 1% of the representative assessment period.

LA10 assigned level Means an assigned level which, measured as a LA Slow value, is not to be exceeded for more than 10% of the representative assessment period.

Tonal Noise A tonal noise source can be described as a source that has a distinctive noise emission in one or more frequencies. An example would be whining or droning. The quantitative definition of tonality is:

the presence in the noise emission of tonal characteristics where the difference between —

(a) the A-weighted sound pressure level in any one-third octave band; and

(b) the arithmetic average of the A-weighted sound pressure levels in the 2 adjacent one-third octave bands,

is greater than 3 dB when the sound pressure levels are determined as LAeq,T levels where the time period T is greater than 10% of the representative assessment period, or greater than 8 dB at any time when the sound pressure levels are determined as LA Slow levels.

This is relatively common in most noise sources.



Modulating Noise A modulating source is regular, cyclic and audible and is present for at least 10% of the measurement period. The quantitative definition of tonality is:

a variation in the emission of noise that —

(a) is more than 3 dB LA Fast or is more than 3 dB LA Fast in any one-third octave band;

(b) is present for at least 10% of the representative

Impulsive Noise An impulsive noise source has a short-term banging, clunking or explosive sound. The quantitative definition of tonality is:

a variation in the emission of a noise where the difference between LA peak and LA Max slow is more than 15 dB when determined for a single representative event;

Major Road

Is a road with an estimated average daily traffic count of more than 15,000 vehicles.

Secondary / Minor Road

Is a road with an estimated average daily traffic count of between 6,000 and 15,000 vehicles.

Influencing factor

( ) ( )

100m within roadmajor each for 6450m within roadmajor each for 2

100m within roadsecondary each for 2 dB) 6 of (maximumFactor Traffic

noise thereceiving premises theof radius 450m a within land commercial of percentage the%TypeB

noise thereceiving premises theof radius a100m within land commercial of percentage theB Type %

noise thereceiving premises theof radius 450m a within land industrial of percentage the%TypeA

noise thereceiving premises theof radius a100m withinland industrial of percentage theA Type %

:

B Type %B Type %201A Type %A Type %

101

450

100

450

100

450100450100

===+

=

=

=

=

+++=

where

Representative Assessment Period

Means a period of time not less than 15 minutes, and not exceeding four hours, determined by an inspector or authorised person to be appropriate for the assessment of a noise emission, having regard to the type and nature of the noise emission.



Background Noise Background noise or residual noise is the noise level from sources other than the source of concern. When measuring environmental noise, residual sound is often a problem. One reason is that regulations often require that the noise from different types of sources be dealt with separately. This separation, e.g. of traffic noise from industrial noise, is often difficult to accomplish in practice. Another reason is that the measurements are normally carried out outdoors. Wind-induced noise, directly on the microphone and indirectly on trees, buildings, etc., may also affect the result. The character of these noise sources can make it difficult or even impossible to carry out any corrections.

Ambient Noise Means the level of noise from all sources, including background noise from near and far and the source of interest.

Specific Noise Relates to the component of the ambient noise that is of interest. This can be referred to as the noise of concern or the noise of interest.

Satisfactory Design Sound Level The level of noise that has been found to be acceptable by most people for the environment in question and also to be not intrusive.

Maximum Design Sound Level The level of noise above which most people occupying the space start to become dissatisfied with the level of noise.

Reverberation Time Of an enclosure, for a sound of a given frequency or frequency band, the time that would be required for the reverberantly decaying sound pressure level in the enclosure to decrease by 60 decibels.

RMS The root mean square level. This is used to represent the average level of a wave form such as vibration.

Vibration Velocity Level The RMS velocity of a vibration source over a specified time period. Units are mm/s.

Peak Velocity Level of vibration velocity measured as a non root mean square (r.m.s.) quantity in millimetres per second (mm/s).



Chart of Noise Level Descriptors

Typical Noise Levels

APPENDIX 6

Dust Management Plan and

Incident Report Form

URB-Form-03-13 Issue 1 April 2011

DUST INCIDENT REPORT FORM Date:__________________ Time:_____________ Received by:________________________

Complaint Received From:

Name:_________________________________ Tel No:_______________________________

Address:_____________________________________________________________________

Area/Suburb:__________________________ Municipality:____________________________

Name of Developer/Operator:____________________________________________________

Address of Developer/Operator:__________________________________________________

Address of Development/Operation:_______________________________________________

Type of complaint (odour, dust, smoke, noise, other)__________________________________

____________________________________________________________________________

Details of Incident Received (effect/frequency)_______________________________________

____________________________________________________________________________

Referred to:____________________________ Date:__________________________________

Action Taken/Advice Given/Matter Referred to:____________________________________

_____________________________________________________________________________

_____________________________________________________________________________

_____________________________________________________________________________

_____________________________________________________________________________

Recorded by:________________________________ Date:______________________________

Documents

APPLICATION FOR WORKS APPROVAL Limestone Crushing and