boggabri coal mine - idemitsu2016/05/02 · 16142_r02 page 1 1 introduction 1.1 background global...

Boggabri Coal Mine

________________________________________

Environmental Noise Monitoring

May 2016

Prepared for

Boggabri Coal Operations Pty Ltd

________________________________________

Boggabri Coal Mine - May 2016 Environmental Noise Monitoring

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Boggabri Coal Mine

May 2016

Environmental Noise Monitoring

Reference: 16142_R02

Report date: 27 May 2016

Prepared for

Boggabri Coal Operations Pty Ltd

PO Box 12

Boggabri NSW 2382

Prepared by

Global Acoustics Pty Ltd

PO Box 3115

Thornton NSW 2322

Prepared: Jonathan Erasmus

Acoustic Technician

QA Review: Amanda Borserio

Environmental Scientist (Acoustics)

Global Acoustics Pty Ltd ~ Environmental noise modelling and impact assessment ~ Sound power testing ~ Noise

control advice ~ Noise and vibration monitoring ~ OHS noise monitoring and advice ~ Expert evidence in Land and

Environment and Compensation Courts ~ Architectural acoustics ~ Blasting assessments and monitoring ~ Noise

management plans (NMP) ~ Sound level meter and noise logger sales and hire


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EXECUTIVE SUMMARY

Global Acoustics was engaged by Boggabri Coal Operations Pty Ltd to conduct a noise survey around

Boggabri Coal Mine (BCM), an open cut coal mine located north-east of the township of Boggabri, NSW.

Attended environmental noise monitoring described in this report was undertaken during the night period

of 10/11 May 2016. There were eight attended monitoring locations during this survey as listed in Table 1.1

and shown in Figure 1.

The survey purpose is to quantify and describe the existing acoustic environment around the mine and

compare results with relevant limits in the project approval and Environment Protection Licence (EPL).

Attended monitoring was conducted during the night period in accordance with the EPA ‘Industrial Noise

Policy’ (INP) guidelines and Australian Standard AS 1055 ‘Acoustics, Description and Measurement of

Environmental Noise’. The duration of each measurement was 15 minutes. Monitoring was conducted

during the night period, as project approval and EPL noise limits are the same for the day, evening and night

periods, and it is considered that night is the most conservative period in which to monitor.

Noise levels from BCM complied with the LAeq,15 minute and LA1,1 minute project approval and EPL

criteria at all monitoring locations during the May 2016 survey.



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Table of ContentsTable of ContentsTable of ContentsTable of Contents

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

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

1.2 Monitoring Locations...................................................................................................................................1

1.3 Terminology & Abbreviations.....................................................................................................................3

2 CONSENT AND CRITERIA...............................................................................................................................4

2.1 Project Approval...........................................................................................................................................4

2.1.1 Project Approval Impact Assessment Criteria..........................................................................................4

2.1.2 Cumulative Noise Criteria.......................................................................................................................5

2.2 Environment Protection Licence..................................................................................................................5

2.3 Modifying Factors.........................................................................................................................................6

2.3.1 Tonality, Intermittent and Impulsive Noise.............................................................................................6

2.3.2 Low Frequency Noise..............................................................................................................................6

2.4 Low Frequency Criteria................................................................................................................................7

3 METHODOLOGY...............................................................................................................................................8

3.1 Overview.......................................................................................................................................................8

3.2 Cumulative Noise.........................................................................................................................................8

3.3 Modification Factors.....................................................................................................................................9

3.4 Monitoring Equipment.................................................................................................................................9

4 RESULTS.............................................................................................................................................................10

4.1 Attended Noise Monitoring.......................................................................................................................10

4.1.1 Low Frequency Assessment...................................................................................................................13

4.1.2 Cumulative Noise Assessment...............................................................................................................14

4.2 Atmospheric Conditions............................................................................................................................15

5 SUMMARY OF COMPLIANCE.......................................................................................................................16

5.1 Operational Noise Assessment..................................................................................................................16

5.2 Low Frequency Assessment.......................................................................................................................16


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AppendicesAppendicesAppendicesAppendices

A STATUTORY REQUIREMENTS.....................................................................................................................17

B CALIBRATION CERTIFICATES.....................................................................................................................27


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1 INTRODUCTION

1.1 Background

Global Acoustics was engaged by Boggabri Coal Operations Pty Ltd to conduct a noise survey around

Boggabri Coal Mine (BCM), an open cut coal mine located north-east of the township of Boggabri, NSW.

Attended environmental noise monitoring described in this report was undertaken during the night period

of 10/11 May 2016. There were eight attended monitoring locations during this survey as listed in Table 1.1

and shown in Figure 1.

The survey purpose is to quantify and describe the existing acoustic environment around the mine and

compare results with relevant limits.

1.2 Monitoring Locations

There were eight monitoring locations during this survey as detailed in Table 1.1 and shown on Figure 1. It

should be noted that this figure shows the actual monitoring position, not the location of residences.

Table 1.1: BCM MONITORING LOCATIONS

Report Descriptor Property name and location

N1 Goonbri, Goonbri Road

N2 Sylvania, Dripping Rock Road

N3 Picton, Dripping Rock Road

N4 Barbers Lagoon, Boggabri-Manilla Road

N5 Glenhope, 84 Warners Road

N6 Roma, Vine Lane

N7 Arlington, Curracabah Road

N8 Roma 2, 94 Warners Road


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Figure 1: Boggabri Coal Attended Noise Monitoring Locations (Source: BCM Noise Management Plan)


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1.3 Terminology & Abbreviations

Some definitions of terms and abbreviations, which may be used in this report, are provided in Table 1.2.

Table 1.2: TERMINOLOGY & ABBREVIATIONS

Descriptor Definition

LA The A-weighted root mean squared (RMS) noise level at any instant

LAmax The maximum A-weighted noise level over a time period or for an event

LA1 The noise level which is exceeded for 1 per cent of the time

LA10The noise level which is exceeded for 10 percent of the time, which is approximately the

average of the maximum noise levels

LA50 The noise level which is exceeded for 50 per cent of the time

LA90

The level exceeded for 90 percent of the time, which is approximately the average of theminimum noise levels. The LA90 level is often referred to as the “background” noise

level and is commonly used to determine noise criteria for assessment purposes

LAmin The minimum A-weighted noise level over a time period or for an event

LAeq The average noise energy during a measurement period

Lpk The unweighted peak noise level at any instant

dB(A)Noise level measurement units are decibels (dB). The “A” weighting scale is used to

describe human response to noise

SPLSound pressure level (SPL), fluctuations in pressure measured as 10 times a logarithmic

scale, the reference pressure being 20 micropascals

ABLAssessment background level (ABL), the 10th percentile background noise level for a

single period (day, evening or night) of a 24 hour monitoring period

RBLRating background level (RBL), the background noise level for a period (day, evening or

night) determined from ABL data

Hertz (Hz)Cycles per second, the frequency of fluctuations in pressure, sound is usually a

combination of many frequencies together

VTGVertical temperature gradient in degrees Celsius per 100 metres altitude. Estimated from

wind speed and sigma theta data

IAInaudible. When site only noise is noted as IA, there was no noise from the source of

interest audible at the monitoring location

NMNot Measurable. If site only noise is noted as NM, this means some noise from the

source of interest was audible at low-levels, but could not be quantified

Day This is the period 7:00am to 6:00pm

Evening This is the period 6:00pm to 10:00pm

Night This is the period 10:00pm to 7:00am


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2 CONSENT AND CRITERIA

All monitoring has been carried out in accordance with the BCM Project Approval, Environment Protection

Licence (EPL 12407) and Noise Management Plan (NMP).

2.1 Project Approval

2.1.1 Project Approval Impact Assessment Criteria

Noise conditions from BCM's MOD 4 consolidated consent (09-0182) are reproduced in Appendix A. Table 3

in Section 5 of the project approval outlines the day, evening and night time impact assessment criteria for

the project, which are reproduced in Table 2.1.

Table 2.1: NIGHT TIME PROJECT APPROVAL IMPACT ASSESSMENT CRITERIA

Descriptor Monitoring Location Day/Evening/Night ImpactAssessment Criterion

LAeq,15minute dB

Night Impact Assessment CriterionLA1,1minute dB

N1 Goonbri NA NA

N2 Sylvania 35 45

N3 Picton 35 45

N4 Barbers Lagoon 35 45

N5 Glenhope NA NA

N6 Roma 35 45

N7 Arlington 35 45

N8 Roma 2 NA NA

Note:

1. NA indicates that this location is acquisition on request, and therefore, has no criteria.

Notes under the criteria table in the project approval state that:

“ 1. Noise generated by the project is to be measured in accordance with the relevant requirements, and

exemptions (including certain meteorological conditions), of the NSW Industrial Noise Policy

2. Operational noise generated by the project includes noise generated from the use of the private haul road and

proposed rail spur.”

Further to this, Section 14 – Noise Measurement, outlines further detail on meteorological exclusions:

“Where conditions in this approval refer to measurement of noise within the context of the NSW Industrial Noise

Policy the inversion class to be applied to the project is Class G.”


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Based on the information in the project approval noise limits have been assumed to apply under all

meteorological conditions except for:

• wind speeds greater than 3 m/s at 10 metres above ground level.

As noise limits apply under the strongest inversion conditions, stability class G, no exemptions for inversion

conditions are applicable for BCM.

2.1.2 Cumulative Noise Criteria

Cumulative noise impact assessment criteria as specified in Table 4 of Section 7 of BCM's project approval

are detailed in Table 2.2.

Table 2.2: NIGHT LAeq,period CUMULATIVE CRITERIA

Descriptor Monitoring Location Cumulative Impact Assessment CriterionLAeq,night dB

N1 Goonbri NA

N2 Sylvania 40

N3 Picton 40

N4 Barbers Lagoon 40

N5 Glenhope NA

N6 Roma 40

N7 Arlington 40

N8 Roma 2 NA

Notes from project approval:

1. Cumulative noise is to be measured in accordance with the relevant requirements, and exemptions (including certain meteorological

conditions), of the NSW Industrial Noise Policy; and

2. Operational noise includes noise from the mining operations and use of private haul roads and rail spurs.

2.2 Environment Protection Licence

BCM holds Environment Protection Licence (EPL) No.12407. Section L3 of the licence specifies noise limits

and the meteorological conditions in which they apply. These limits and meteorological exclusions are

consistent between the EPL and the project approval, however, the EPL does not specify cumulative noise

criteria.

Section M8 of the EPL specifies monthly monitoring during the night period for fifteen minutes at each

location. Eight monitoring locations were included in the May survey while changes to the NMP were being

finalised. These changes remove the requirement for monitoring at N1, N5 and N8.


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2.3 Modifying Factors

Noise monitoring and reporting is carried out generally in accordance with the Environment Protection

Authority (EPA) 'Industrial Noise Policy' (INP). Chapter 4 of the INP deals specifically with modifying

factors that may apply to industrial noise. The most common modifying factors are addressed in detail

below.

2.3.1 Tonality, Intermittent and Impulsive Noise

As defined in the Industrial Noise Policy:

Tonal noise contains a prominent frequency and is characterised by a definite pitch.

Impulsive noise has high peaks of short duration or a sequence of such peaks.

Intermittent noise is characterised by the level suddenly dropping to the background noise levels several times

during a measurement, with a noticeable change in noise level of at least 5 dB. Intermittent noise applies to

night-time only.

Years of monitoring have indicated that noise levels from mining operations, particularly those levels

measured at significant distances from the source, are relatively continuous. Given this, noise levels from

BCM at the monitoring locations are unlikely to be intermittent. In addition, there is no equipment on site

that is likely to generate tonal or impulsive noise as defined in the INP.

2.3.2 Low Frequency Noise

INP Method

As defined in the Industrial Noise Policy:

Low frequency noise contains major components within the low frequency range (20 Hz to 250 Hz) of the

frequency spectrum.

As detailed in Chapter 4 of the INP, low frequency noise should be assessed by measuring the site only C-

weighted and site only A-weighted level over the same time period. The correction/penalty of 5 dB is

applied if the difference between the two levels is 15 dB or more.

Broner Method

Low frequency noise can also be assessed against criteria specified in the paper “A Simple Method for Low

Frequency Noise Emission Assessment” (Broner JLFNV vol29-1 pp1-14 2010). If the total predicted site only

C-weighted noise level at a receptor exceeds the relevant criterion, a 5 dB penalty (modifying factor) is

added to measured levels. This method is included to provide a comparison with the INP method.


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2.4 Low Frequency Criteria

Low frequency assessment methods are detailed in Table 2.3.

Table 2.3: LOW FREQUENCY ASSESSMENT METHODS AND MODIFYING FACTOR TRIGGERS

Assessment Method Calculation Method Night Period ModifyingFactor Trigger

Day Period ModifyingFactor Trigger

Broner, 2010 Site only LCeq >60 >65

INP, total Site only LCeq minus site only

LAeq

>=15 >=15

The EPA is currently undertaking a review of the assessment of low frequency noise. While a practice note

is not yet available, low frequency noise results from BCM have been compared to a range of assessment

methods and criteria presented above, when considering applicability of low frequency modifying factor

corrections.


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3 METHODOLOGY

3.1 Overview

Noise monitoring was conducted in accordance with the Environmental Protection Authority (EPA)

'Industrial Noise Policy' (INP) guidelines and Australian Standard AS1055 'Acoustics, Description and

Measurement of Environmental Noise'. Atmospheric condition measurement was also undertaken.

Monitoring was conducted during the night period, as project approval and EPL noise limits are the same

for the day, evening and night periods, and it is considered that night is a more conservative period in which

to monitor. One fifteen minute measurement was taken at each location.

In most cases, monitoring near the residence façade is impractical due to barking dogs or issues with

obtaining access. In all cases, measurements for this survey were undertaken at a suitable and

representative location.

The terms “Inaudible” (IA) and “Not Measurable” (NM), “Less than 20 dB” (<20dB) or “Less than 25 dB”

(<25 dB) may be used in this report. When site noise is noted as IA then there was no site noise at the

monitoring location.

However, if site noise is noted as NM, <20 dB or <25 dB, this means some noise was audible but could not be

quantified. This means that noise from the site was either very low, or being masked by other noise that was

relatively loud. In the former case (very low site levels) we consider it not necessary to attempt to accurately

quantify site noise as it would be significantly less than any criterion and most unlikely to cause annoyance

(and in many cases, to be even noticed).

If site noise were NM due to masking then we would employ methods as per the Industrial Noise Policy (eg

measure close and back calculate) to determine a value for reporting if deemed necessary. All site NM in

this report are due to low absolute values.

Meteorological data was obtained from the BCM weather station. This allowed correlation of atmospheric

parameters and measured noise levels.

3.2 Cumulative Noise

In order to assess cumulative noise impacts as required, we have assumed total mining noise levels from the

attended survey will apply for the entire period being assessed.


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3.3 Modification Factors

Years of monitoring have indicated that noise levels from mining operations, particularly those levels

measured at significant distances from the source are relatively continuous. Given this, noise levels from

BCM at the monitoring locations are unlikely to be intermittent. In addition, there is no equipment on site at

BCM that would generate impulsive noise as defined in the INP. However, low frequency noise from BCM

has been addressed.

3.4 Monitoring Equipment

The equipment used to measure environmental noise levels is detailed in Table 3.1. Calibration certificates

are provided in Appendix B.

Table 3.1: MONITORING EQUIPMENT

Model Serial Number Calibration Due Date

Rion NA-28 sound level analyser 00370304 29/05/2017

Larson Davis CAL150 acoustic calibrator 3333 06/08/2017


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4 RESULTS

4.1 Attended Noise Monitoring

Noise levels measured at each location during attended surveys are provided in Table 4.1.

Table 4.1: MEASURED NOISE LEVELS - MAY 20161

Location Start Date andTime

LAmax

dB

LA1

dB

LA10

dB

LA50

dB

LAeq

dB

LA90

dB

LAmin

dB

N1 - Goonbri 10/05/2016 22:56 58 38 34 31 32 28 25

N2 - Sylvania 10/05/2016 22:02 58 41 34 29 33 26 23

N3 - Picton 10/05/2016 22:28 46 39 35 31 32 28 23

N4 - Barbers Lagoon 10/05/2016 23:31 44 28 22 18 20 16 15

N5 - Glenhope 10/05/2016 23:56 50 34 28 19 24 15 14

N6 - Roma 11/05/2016 00:49 86 75 34 23 63 21 18

N7 - Arlington 11/05/2016 01:21 37 26 21 16 18 15 14

N8 - Roma 2 11/05/2016 00:18 44 33 31 27 28 25 20

Notes:

1. Levels in this table are not necessarily the result of activity at BCM.

Table 4.2 compares measured LAeq,15minute levels from BCM with project approval/EPL criteria.


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Table 4.2: LAeq,15minute GENERATED BY BCM AGAINST PROJECT APPROVAL/EPL CRITERIA - MAY 2016


WindSpeedm/s1

StabilityClass2

CriteriondB3

CriterionApplies?2,3

BCMLAeq,15min

dB4,5

Exceedance3,5,6

N1 - Goonbri 10/05/2016 22:56 1.2 E NA NA IA NA

N2 - Sylvania 10/05/2016 22:02 1.0 F 35 Yes IA Nil

N3 - Picton 10/05/2016 22:28 0.9 F 35 Yes IA Nil

N4 - Barbers Lagoon 10/05/2016 23:31 1.2 F 35 Yes IA Nil

N5 - Glenhope 10/05/2016 23:56 0.8 F NA NA IA NA

N6 - Roma 11/05/2016 00:49 1.2 D 35 Yes IA Nil

N7 - Arlington 11/05/2016 01:21 1.3 D 35 Yes IA Nil

N8 - Roma 2 11/05/2016 00:18 1.3 E NA NA IA NA

Notes:

1. Criterion may or may not apply due to rounding of meteorological data values;

2. Noise emission limits do not apply during wind speeds greater than 3 metres per second (at a height of 10 metres), stability class data is

presented for information purposes only;

3. NA in criterion, criterion applies and exceedance columns indicates this location is acquisition on request and has no criterion;

4. Estimated or measured LAeq,15minute attributed to BCM;

5. Bolded results in red are possible exceedances of relevant criteria; and

6. NA in exceedance column means atmospheric conditions outside conditions specified in project approval and EPL and so criterion is not

applicable.

Table 4.3 compares measured LA1,1minute levels from BCM with project approval/EPL criteria.


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Table 4.3: LA1,1minute GENERATED BY BCM AGAINST PROJECT APPROVAL/EPL CRITERIA – MAy 2016


WindSpeedm/s1

StabilityClass2

CriteriondB3

CriterionApplies?2,3

BCMLA1,1min dB4,5

Exceedance3,5,

6

N1 - Goonbri 10/05/2016 22:56 1.2 E NA NA IA NA

N2 - Sylvania 10/05/2016 22:02 1.0 F 45 Yes IA Nil

N3 - Picton 10/05/2016 22:28 0.9 F 45 Yes IA Nil

N4 - Barbers Lagoon 10/05/2016 23:31 1.2 F 45 Yes IA Nil

N5 - Glenhope 10/05/2016 23:56 0.8 F NA NA IA NA

N6 - Roma 11/05/2016 00:49 1.2 D 45 Yes IA Nil

N7 - Arlington 11/05/2016 01:21 1.3 D 45 Yes IA Nil

N8 - Roma 2 11/05/2016 00:18 1.3 E NA NA IA NA

Notes:

1. Criterion may or may not apply due to rounding of meteorological data values;

2. Noise emission limits do not apply during wind speeds greater than 3 metres per second (at a height of 10 metres), stability class data is

presented for information purposes only;

3. NA in criterion, criterion applies and exceedance columns indicates this location is acquisition on request and has no criterion;

4. Estimated or measured LA1,1minute attributed to BCM;

5. Bolded results in red are possible exceedances of relevant criteria; and

6. NA in exceedance column means atmospheric conditions outside conditions specified in project approval and EPL and so criterion is not

applicable.


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4.1.1 Low Frequency Assessment

Table 4.4 provides statistics for attended noise monitoring undertaken around BCM on 10/11 May 2016.

Table 4.4: ATTENDED MEASUREMENT STATISTICS FOR BCM - MAY 2016

Conditions Total for May 2016

Number of measurements 8

Number of measurements where criterion applies (wherethere is an applicable criterion)

0

Number of measurements where BCM was directlymeasurable (not less than a maximum cut-off value), was

within 5 dB of the criteria and where met results incriterion applying

0

None of the 8 measurements occurred during which BCM was directly measurable (not “inaudible”, “not

measurable” or less than a maximum cut-off value “<30 dB”), was within 5 dB of the relevant criteria and

where meteorological conditions resulted in criteria applying (in accordance with the project approval and

EPL). No further low frequency assessment is required.


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4.1.2 Cumulative Noise Assessment

Table 4.5 compares measured LAeq levels for BCM and all other audible mining operations with cumulative

noise impact assessment criteria, as detailed in the project approval.

Table 4.5: MINING LAeq,period NOISE LEVELS AGAINST BCM CUMULATIVE IMPACT ASSESSMENT CRITERIA - MAY 2016

Location Start Date and Time CumulativeCriterion

LAeq,period dB1

BCM CumulativeLAeq,period dB2,3,4

Exceedance1,4

N1 - Goonbri 10/05/2016 22:56 NA Nil NA

N2 - Sylvania 10/05/2016 22:02 40 Nil Nil

N3 - Picton 10/05/2016 22:28 40 Nil Nil

N4 - Barbers Lagoon 10/05/2016 23:31 40 Nil Nil

N5 - Glenhope 10/05/2016 23:56 NA Nil NA

N6 - Roma 11/05/2016 00:49 40 Nil Nil

N7 - Arlington 11/05/2016 01:21 40 Nil Nil

N8 - Roma 2 11/05/2016 00:18 NA Nil NA

Notes:

1. NA in criterion and exceedance columns indicates this location is acquisition on request and has no criterion;

2. These are results for BCM and all other mining noise. 15 minute measurements have been assumed to apply across the entire night period

as worst case results;

3. By definition, cumulative noise refers to two or more noise sources. If only one source of mining noise is audible, or if BCM is inaudible,

then the measured cumulative noise is defined here as Nil; and

4. Bolded results in red are possible exceedances of relevant criteria.


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4.2 Atmospheric Conditions

Atmospheric condition measurement data, collected with each noise measurement, using a kestrel hand held

meteorological monitor are shown in Table 4.6.

Table 4.6: MEASURED ATMOSPHERIC CONDITIONS – MAY 2016


TemperatureDegrees

Wind Speed m/s

Wind DirectionDegrees

Cloud CoverEighths

N1 - Goonbri 10/05/2016 22:56 NR 0.0 - 4

N2 - Sylvania 10/05/2016 22:02 NR NR NR 7

N3 - Picton 10/05/2016 22:28 NR NR NR 4

N4 - Barbers Lagoon 10/05/2016 23:31 NR 0.0 - 4

N5 - Glenhope 10/05/2016 23:56 NR 0.0 - 3

N6 - Roma 11/05/2016 00:49 NR NR NR 0

N7 - Arlington 11/05/2016 01:21 NR 0.0 - 0

N8 - Roma 2 11/05/2016 00:18 NR 0.0 - 0

Notes:

1. Wind speed and direction measured at 1.8 metres; and

2. NR indicates that this data was not recorded due to technical difficulties.


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5 SUMMARY OF COMPLIANCE

The following summaries apply to attended noise monitoring conducted during the night of 10/11 May

2016.

5.1 Operational Noise Assessment

Activities from BCM complied with the relevant project approval and EPL noise limits during monitoring on

10/11 May 2016 at all monitoring locations.

5.2 Low Frequency Assessment

No measurements occurred during which BCM mine was directly measurable, was within 5 dB of the

criteria and where meteorological conditions resulted in criteria applying (in accordance with the project

approval and EPL).

No further low frequency assessment was carried out.



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APPENDIX

A STATUTORY REQUIREMENTS


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The noise sections of the BCM's project approval are reproduced below:

A.1 BCM DEVELOPMENT CONSENT


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The noise sections of the BCM's EPL are reproduced below:

A.2 BCM EPL CONDITIONS


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APPENDIX

B CALIBRATION CERTIFICATES


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boggabri coal mine - idemitsu2016/05/02 · 16142_r02 page 1 1 introduction 1.1 background global...

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