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Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment Report Number 620.11954-R02 4 October 2017 Senex Energy Level 14, 144 Edward Street Brisbane, QLD 4001 Version: v2.0

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Page 1: Eos Export Pipeline - Senex Energy · Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment Report Number 620.11954-R02 4 October 2017 Version v2.0 Page 4 Executive

Eos Export Pipeline

Pipeline Field Compression Facility

Noise Assessment

Report Number 620.11954-R02

4 October 2017

Senex Energy

Level 14, 144 Edward Street

Brisbane, QLD 4001

Version: v2.0

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

Version v2.0 Page 2

SLR Consulting Australia Pty Ltd

Eos Export Pipeline

Pipeline Field Compression Facility

Noise Assessment

PREPARED BY:

SLR Consulting Australia Pty Ltd ABN 29 001 584 612

Level 2, 15 Astor Terrace

Spring Hill QLD 4000 Australia

(PO Box 26 Spring Hill QLD 4004)

+61 7 3858 4800 +61 7 3858 4801

[email protected] www.slrconsulting.com

This report has been prepared by SLR Consulting Australia Pty Ltd

with all reasonable skill, care and diligence, and taking account of the

timescale and resources allocated to it by agreement with the Client.

Information reported herein is based on the interpretation of data collected,

which has been accepted in good faith as being accurate and valid.

This report is for the exclusive use of Senex Energy.

No warranties or guarantees are expressed or should be inferred by any third parties.

This report may not be relied upon by other parties without written consent from SLR.

SLR disclaims any responsibility to the Client and others in respect of any matters outside the agreed scope of the work.

DOCUMENT CONTROL

Reference Date Prepared Checked Authorised

620.11954-R02-v2.0 4 October 2017 Steven Walker Mark Caslin Mark Caslin

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

Version v2.0 Page 3

Executive Summary

SLR Consulting Australia Pty Ltd

Western Surat Gas Project – Eos Export Pipeline Field Compression Facility

Senex Energy (Senex) is an Australian oil and gas exploration and production company holding coal seam gas (CSG) tenements in Queensland’s Surat Basin, including the Western Surat Gas Project (WSGP). The WSGP involves the delivery of CSG from an approximate 915 square kilometre (km) region north of Roma.

Senex proposes to construct a 5 km high pressure underground gas pipeline from the proposed WSGP to provide a connection to existing gas infrastructure. The pipeline will include a Field Compression Facility (FCF) which will provide gas compression and dehydration facilities to transform the raw gas into gas capable of being delivered into a transmission pipeline.

The FCF is to be located 40 km northeast of Roma, at the eastern extent of the Spring Gully area of Queensland and within an area covered by Authority to Prospect (ATP) 795. There is one sensitive receptor located in the region, located 5.8 km from the FCF Site. The receptor is a residential property known as Mt Saltbush House – White, located off Mt Saltbush Road.

In accordance with relevant Department of Environment and Heritage Protection (DEHP) guidelines and environmental legislation for acoustics, this report provides an assessment of the potential noise emissions from the FCF, and any associated noise impacts at the receptor.

Assessment of Noise During Operation

A baseline noise survey was undertaken in August 2017 in the area surrounding the FCF site to define the existing noise environment and inform the establishment of appropriate noise limits (assessment criteria). The existing noise environment has background noise levels as low as LA90 22 dBA and aside from natural sources of noise such as wind noise and birdsong, the only notable source of noise was from CSG drilling operations.

In such instances, DEHP acknowledge that background noise levels below LA90 25 dBA lead to noise limits that cannot be reasonably achieved. For this reason a minimum background noise level of LA90 25 dBA has been applied when establishing noise assessment criteria.

Noise criteria for the operation of the FCF have been referenced from the Environmental Protection (Noise) Policy 2008 and DEHP’s Streamlined Model Conditions for petroleum activities. The assessment of noise from the operation of the FCF has been based on the most stringent noise limits for the night-time period to provide a comprehensive assessment of noise to the applicable legislation and guidelines. The referenced noise criteria are as follows:

EPP Noise LAeq(1hour) 25 dBA

Streamlined Model Conditions LAeq(15minute) 28 dBA

A noise prediction model was developed for the FCF and surrounding environment using the SoundPLAN noise propagation software. At the nearest residential receptor, noise levels of up to LAeq 21 dBA during FCF operations and up to LAeq 23 dBA during flaring. The noise levels are predicted to comply with both the EPP Noise and Streamlined Model Conditions at all times.

The exhausts of the gas engines were identified as the primary source of noise and the design of the FCF is to include a ‘hospital’ grade acoustic silencer on each exhaust to control noise emissions.

Predicted noise levels for the flaring events achieved the requirements of the EPP Nosie and Model Streamlined Conditions without the requirement for noise controls or noise mitigation.

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

Version v2.0 Page 4

Executive Summary

SLR Consulting Australia Pty Ltd

Assessment of Noise during Construction

Noise levels at the nearest receptor during the construction of the FCF have been predicted to be very low, less than LAeq 10 dBA, which is indicative of the 5.8 km distance between the receptor and the site of the FCF. The predicted noise levels are below the existing daytime noise levels of LAeq 44 dBA and LA90 23 dBA and therefore the construction works are not expected to adversely impact the noise environment at the nearest residence.

Based on the assessment and, in the absence of numerical noise limits for construction works between 6.30 am and 6.30 pm Monday to Saturday, specific mitigation measures to address construction noise emissions are not required.

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

Version v2.0 Page 5

Table of Contents

SLR Consulting Australia Pty Ltd

1 INTRODUCTION 7

1.1 The Western Surat Gas Project 7

1.2 Assessment of Noise 7

2 PROJECT DESCRIPTION 8

2.1 Compressor Station Operations 8

2.2 Noise Emissions Sources 8

3 EXISTING ENVIRONMENT 11

3.1 Sensitive Receptors 11

3.2 Existing Noise Environment 11

4 ASSESSMENT METHODOLOGY 13

4.1 Methodology Overview 13

4.2 Noise Emission Inventory 13

4.3 Noise Prediction Modelling 14

4.3.1 Noise Prediction Model 14

4.3.2 Meteorological Conditions in the Noise Model 14

5 NOISE ASSESSMENT CRITERIA 16

5.1 Overview 16

5.2 Noise Assessment Criteria for FCF Operations 16

5.2.1 Streamlined Model Conditions 16

5.2.2 Environmental Protection Policy (Noise) 17

5.3 Summary of Assessment Criteria for FCF Operations 18

5.4 Construction Noise Criteria 18

6 NOISE LEVELS DURING OPERATION 19

6.1 Predicted Operational Noise levels 19

6.2 Maximum (LAmax) Noise Levels – Flaring 19

6.3 Low Frequency Noise 19

7 NOISE LEVELS DURING CONSTRUCTION 19

8 RECOMMENDATIONS 20

9 CONCLUSION 20

TABLES

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

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Table of Contents

SLR Consulting Australia Pty Ltd

Table 1 FCF Key Noise Emission Sources 8 Table 2 Monitored Ambient Noise Levels 11 Table 3 Noise Emission Sources for FCF Operations 13 Table 4 Noise Emission Sources for FCF Construction 14 Table 5 Modelled Meteorological Conditions 15 Table 6 Noise Nuisance Limits 16 Table 7 Low Frequency Noise Assessment Criteria 16 Table 8 Noise Characteristic Adjustments 17 Table 9 Background Creep Noise Criteria 17 Table 10 Acoustic Quality Objectives 18 Table 11 Predicted Noise Levels for FCF Operations 19 Table 12 Predicted Noise Levels from Construction 20

FIGURES

Figure 1 Compressor Station Site Location 9 Figure 2 Proposed Plan of the Central Processing Facility 10 Figure 3 Noise Monitoring Locations 12 Figure 4 Analysis of Atmospheric Stability Class 15

APPENDICES

Appendix A Noise Monitoring Methodology Appendix B Daily Monitored Noise Levels Appendix C FCF Source Noise Emission Data Appendix D Analysis of Meteorolgocial Conditions

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

Version v2.0 Page 7

SLR Consulting Australia Pty Ltd

1 INTRODUCTION

1.1 The Western Surat Gas Project

Senex Energy (Senex) is an Australian oil and gas exploration and production company holding coal seam gas (CSG) tenements in Queensland’s Surat Basin, including the Western Surat Gas Project (WSGP). The WSGP involves the delivery of CSG from an approximate 915 square kilometre (km) region north of Roma.

Senex proposes to construct a 5km high pressure underground gas pipeline to provide a connection from the proposed WSGP to provide a connection to existing gas infrastructure. The pipeline will include a Field Compression Facility (FCF) which will provide gas compression and dehydration facilities to transform the raw gas into gas capable of being delivered into a transmission pipeline. The FCF is to be located 40 km northeast of Roma, at the eastern extent of the Spring Gully area of Queensland and within an area covered by Authority to Prospect (ATP) 795.

1.2 Assessment of Noise

In support of the environmental authority application for the Project, this report provides an assessment of noise emission levels, and potential noise impacts, associated with the construction and operation of the FCF. For the proposed design of the FCF noise levels have been assessed against the relevant acoustic legislation and guidelines for Queensland as the appropriate noise limits to demonstrate that the objectives for maintaining health, wellbeing and acoustic amenity are met by the Project.

Based on the minimum distance of approximately 5.8 km between the Project site and nearest receptors, ground vibration from fixed and mobile plant would not be expected to result in any perceptible impacts (disturbance) or structural (cosmetic) damage at residences. Further assessment of ground vibration levels (other than blasting) has not been undertaken.

To assist the interpretation of this report an explanation of common acoustic terms is provided below.

Noise and Sound The terms ‘sound’ and ‘noise’ are almost interchangeable, except that ‘noise’ commonly refers to unwanted sound.

dBA Decibels on the A-weighted scale. The A-weighting filter is applied to sound to provide a good measure of the loudness of sound as experienced by normal human hearing. A change of 1 dBA or 2 dBA in the level of sound is difficult for most people to detect. A change in sound of 10 dBA corresponds to an approximate doubling or halving of loudness.

Sound Power Level This is a measure of the rate at which a source emits acoustic energy. The sound power level is expressed in decibels and is the overall acoustic energy of the source.

Sound Pressure Level This is the sound measured over a specific period of time. It is often referenced to a distance from the source of the sound.

Low frequency noise Commonly referenced as the sound energy at the frequency range 20 Hz to 160 Hz, low frequency sound can be a source of disturbance as it is potentially perceptible as a low rumble. Low frequency sound waves can travel relatively long distances without much attention.

Tonality Tonal noise contains prominent tones (distinct frequency components) and is normally regarding as more offensive than broad band noise.

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

Version v2.0 Page 8

SLR Consulting Australia Pty Ltd

2 PROJECT DESCRIPTION

The proposed FCF site is located 40 km northeast of Roma, shown in Figure 1.

2.1 Compressor Station Operations

Gas extracted from CSG wells will be treated and compressed at the FCF to render it suitable for high-pressure transport via gas pipeline. The facility operates on CSG as the fuel and includes the following processes:

Pre Compression Stage

Receive gas from the CSG field via the in-field gas gathering network

Remove any free water contained within the gas at the two free water knockout drums

Remove any particulates and water contained within the gas at the two filter separator vessels

Compression Stage

Provide gas compression using gas engine driven, reciprocating/screw compressors

Post Compression Stage

Treatment of CSG through compression oil coalescer to remove any compressor oil

Dehydrate the CSG using TEG to meet pipeline specifications

Treatment of CSG through liquid coalescer to remove any TEG from the gas

The process is supported by a number of utilities, including fuel and instrument gas utilities and a start-up air system.

2.2 Noise Emissions Sources

The key sources of noise emissions from the operation of the FCF are detailed below in Table 1 along with the number of plant items proposed for the FCF.

Table 1 FCF Key Noise Emission Sources

Plant Item (Noise Source) Number of Plant at the FCF

Reciprocating compressors 3

Screw compressors 3

Gas engines to drive the reciprocating compressors and screw compressors 6

Gas fired generators 3

Gas fired generator inlet 3

Gas fired generator outlet (with muffler) 3

TEG Unit 1

TEG Pump 1

Gas flare 1

The noise emission levels for each plant item are detailed in detailed in Appendix C. The noise assessment has also considered fixed and mobile sources of noise during the construction of the FCF; the sources of noise during construction are detailed in Section 4.2.

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Figure 2

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

Version v2.0 Page 11

SLR Consulting Australia Pty Ltd

3 EXISTING ENVIRONMENT

3.1 Sensitive Receptors

Based on the definition of sensitive receptors within the Queensland Environmental Protection (Noise) Policy 2008

1 (EPP Noise), there is one sensitive receptor located 5.8 km of the Project Site. The

receptor is a residential property known as Mt Saltbush House – White, located off Mt Saltbush Road and is shown in Figure 1.

Consistent with the EPP (Noise) and the Department of Environment and Heritage Protection (DEHP) guidelines

2, the places that are owned or leased by Senex or its related companies have not been

defined as sensitive receptors.

3.2 Existing Noise Environment

In August 2017, SLR conducted a noise monitoring survey at Spring Gully to determine the existing prior to the commencement of the Project. Noise levels were continuously monitored for eight days at two locations.

Noise monitoring Location 1 was a publically accessible location on Mt Saltbush Road within 1.7 km of the residential receptor. Monitoring Location 2 was on Mt Hope Road to the south-east of the FCF site and was representative of the rural environment. The noise monitoring locations are shown in Figure 3, with the noise monitoring methodology detailed in Appendix A.

To supplement the monitoring of daily noise levels, SLR’s acoustic consultant measured and observed the influence of existing sources of noise at the monitoring locations. The noise environment at each location was influenced by natural sources such as birdsong and insect sounds. At Location 1 the noise environment on 8 August 2017 was also influenced by distant noise from a drilling rig at a measured noise level of 25 dBA. The drill rig was not part of Senex’s operations.

The monitoring ambient and background noise levels are summarised in the following table with graphs and tables of the daily monitored noise levels at each location provided in Appendix B. The noise levels have been presented for the daytime, evening, night-time and morning periods.

The ambient noise levels in Table 2 are the average monitored (LAeq) noise levels for each period, which account for all sources of noise within the local environment. The LA90 noise level is the noise level exceeded for 90% of the monitored duration and is less sensitive than the LAeq to short-lived noise events. To define the long term noise environment, the rating background level (RBL) is derived from the LA90 noise levels in accordance with DEHP’s Planning for Noise Control

3 (PNC) guideline.

Table 2 Monitored Ambient Noise Levels

Time Period Location 1 Mt Hope Road Location 2 End of the Line

LAeq,T RBL (LA90) LAeq,T RBL (LA90)

Daytime 7.00 am to 6.00 pm 51 dBA 23 dBA 44 dBA 23 dBA

Evening 6.00 pm to 10.00 pm 50 dBA 23 dBA 38 dBA 23 dBA

Night-time1 10.00 pm to 7.00 am 42 dBA 22 dBA 40 dBA 23 dBA

Night-time2 10.00 pm to 6.00 am 40 dBA 22 dBA 39 dBA 23 dBA

Early morning 6.00 am to 7.00 am 44 dBA 25 dBA 37 dBA 25 dBA

Note 1 Night-time period as defined by the EPP Noise

Note 2 Night-time period as defined by the DEHP acoustic guidelines for petroleum activities.

1 Queensland Government, 2008. Queensland Environmental Protection (Noise) Policy 2008.

2 Queensland Department of Environment and Heritage Protection 2017. Model Mining Conditions.

3 QLD Department of Environment and Heritage Protection, 2016. Guideline Noise Control, Planning for Noise Control, dated

15 January 2016.

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Senex Energy Eos Export Pipeline Pipeline Field Compression Facility Noise Assessment

Report Number 620.11954-R02 4 October 2017

Version v2.0 Page 13

SLR Consulting Australia Pty Ltd

4 ASSESSMENT METHODOLOGY

4.1 Methodology Overview

The assessment of noise and vibration from petroleum activities was based on the WSGP project description. The key elements of the assessment included:

Defining the assessment scenarios for the construction and operation stage of the FCF.

Development of a SoundPLAN noise prediction model to predict the noise emission levels from the construction and operation of the FCF.

Assessment of predicted noise levels for construction works and operation of the FCF against the noise assessment criteria adopted from relevant environmental legislation and acoustic guidelines.

Where required, a range of reasonable and feasible mitigation measures would be recommended to manage potential impacts and, where reasonable and feasible, achieve compliance to all relevant noise assessment criteria.

4.2 Noise Emission Inventory

Senex supplied SLR with a list of plant required for the operation of the FCF and each plant item was assigned a noise emission with reference to manufacture noise emission data and SLR’s in-house database of noise emission levels, which are based on our experience in assessing noise from gas processing facilities.

The noise emission levels are summarised in Table 3 with the detailed octave band noise emissions provided in Appendix C. The noise emission levels for the exhausts of each of the gas engines were modelled allowing for an acoustic silencer with an overall noise attenuation performance of 30 dBA, which was based on noise attention for a ‘hospital’ grade acoustic silencer provided by the gas engine manufacturer.

Table 3 Noise Emission Sources for FCF Operations

FCF Noise Emission Source Individual Sound Power Level, dBA

Reciprocating compressor 113

Screw compressors 115

Gas engine (drives each reciprocating and screw compressor) 113

Gas engine exhaust (with hospital acoustic silencer) 88

Gas fired generator (per façade) 77

Gas fired generator inlet (standard noise mitigation package) 90

Gas fired generator outlet 91

TEG Unit 101

TEG Pump 80

Gas Flare 126

Source Refer to octave band noise emission levels in Appendix C.

The following noise emission sources were referenced for the assessment of noise from the construction phases of the Project.

The construction program had not been finalised at the time of this assessment, the following plant were adopted to provide an assessment of noise levels where multiple construction plant were in simultaneous operation.

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Table 4 Noise Emission Sources for FCF Construction

Construction Plant Item Individual Sound Power Level, dBA

Earthworks

Excavator CAT 330 – 30T 106

Dozer CAT D6 110

Grader 106

Loader 950H 106

FCF Plant Installation

Franna Crane 20T 102

Crane 100T 108

Hydraulic Crane 200T 111

Scissor Lift (x2) 99

Mobile Diesel Welders (x3) 101

Compressor (x3) 103

Hiab Flat-bed Truck 108

4.3 Noise Prediction Modelling

4.3.1 Noise Prediction Model

A SoundPLAN (Version 7.4) computer noise model was used for the prediction of noise levels at sensitive receptors. The noise model comprised contours of the regional terrain, 3D designs for the FCF, noise sources for the construction and operation activities as well as the location of noise sensitive receptors.

The computer model calculated the noise levels at sensitive receptors, taking into account:

All noise source sound power levels and frequency spectra.

Noise propagation variables such as distance attenuation, ground absorption, air absorption and shielding attenuation from topography, buildings or barriers.

Defined meteorological conditions for the region.

The calculation procedure takes into account the direct noise, the noise diffracting over obstacles or barriers and the noise reflected off buildings.

4.3.2 Meteorological Conditions in the Noise Model

Detailed analysis of regional meteorological conditions has been undertaken by SLR for the assessment of air quality from the Project. The outcomes of the meteorological analysis are summarised below with wind rose data provided in Appendix D.

The seasonal wind roses indicate that the wind is from the north to north-east for the daytime, evening and night-time periods throughout the majority of the year. Wind speeds are typically 1.5 m/s to 5.5 m/s and it is uncommon to have calm conditions with wind speeds at 0 m/s. The prevailing winds from the north, north-east and north-north-east, not greater than 3 m/s, do not occur for greater than 21% of the daytime, evening and night-time periods in any season. In accordance with the PNC, wind is not considered to be a feature for the region with respect to noise.

4 SLR Consulting Australia Pty Ltd, 2016. Air Quality Impact Assessment, Proposed Central Processing Facility (FCF), Western

Surat Gas Project. Report Number 620.11471-R1, dated 15 September 2017.

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During stable atmospheric conditions, where cooler air is trapped nearer to the ground surface by an upper layer of warm air, little or no vertical air movement occurs, this is defined as a temperature inversion. Temperature inversions generally occur during the night-time and early morning of the winter months and can result in the refraction of sound waves which may increase noise propagation.

The atmospheric stability is defined by the Pasquill-Turner assignment scheme defines Stability Classes, A to F. Class F represents moderately stable atmospheric conditions conducive to temperature inversions. The atmospheric stability class frequencies for the Project site during the winter months, from one hour before sunset to one hour after sunrise, are presented in Figure 4.

Figure 4 Analysis of Atmospheric Stability Class

It can be seen that for the winter months during the night-time/ early morning periods there is a higher frequency of the F Class Stability Category. Consistent with the guidance provided in PNC, the noise assessment has considered an F Class temperature inversion.

Considerate of the above analysis, the noise model predictions were undertaken where the atmospheric and wind conditions are not influencing noise propagation (neutral) and also an adverse weather scenario with the F Class temperature inversion and the 2 m/s north-easterly winds (from the north-east). The meteorological conditions included in the noise model are detailed in Table 5.

Table 5 Modelled Meteorological Conditions

Scenario Air Temperature Wind speed Prevailing Wind Direction

Atmospheric Stability Class

Neutral 10°C 0.5 m/s Source to receptor D

Adverse 10°C 2.0 m/s Source to receptor F

Noise emissions for the construction and operation phases of the Project were predicted using the CONCAWE prediction model. CONCAWE is commonly implemented for environmental noise prediction from industrial facilities. It allows for investigation of effects of wind and atmospheric stability on noise propagation.

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5 NOISE ASSESSMENT CRITERIA

5.1 Overview

Noise assessment criteria for the operation of the FCF have been referenced from Queensland’s environmental legislation and relevant DEHP guidelines for noise emissions from petroleum activities.

5.2 Noise Assessment Criteria for FCF Operations

5.2.1 Streamlined Model Conditions

The DEHP, in partnership with the Australian Petroleum Production and Exploration Association (APPEA) published in 2016 Streamlined Model Conditions for the petroleum industry. The conditions can be incorporated in an environmental authority to manage petroleum activities and meet the objectives of the Environmental Protection Act 1994 (EP Act).

The noise nuisance limits in Table 6 are referenced from the model conditions. The nuisance limits were developed with reference to ‘deemed background levels’ which were established to achieve noise limits that are practicably achievable.

Table 6 Noise Nuisance Limits

Time Period Metric Noise Nuisance Limit Deemed background level

Daytime 7.00 to 6.00 pm LAeq,adj,(15min) 40 dBA 35 dBA

Evening 6.00 pm to 10.00 pm LAeq,adj,(15min) 35 dBA 30 dBA

Night-time 10.00 pm to 6.00 am LAeq,adj,(15min) 28 dBA 25 dBA

Max LpA,(15min) 55 dBA -

Morning 6.00 am to 7.00 pm LAeq,adj,(15min) 35 dBA 30 dBA

Source Condition Noise 1 from the Streamlined Model Conditions, 2016.

The maximum (LAmax) 55 dBA noise limit applies during the night-time only and is designed to control discrete individual high noise events which can be associated with awakening and sleep disturbance impacts. For this assessment the flaring operations were identified as the noise source with the potential to emit the highest noise emission level.

The emission of any low frequency noise must not exceed either of the low frequency noise requirements detailed in Table 7.

Table 7 Low Frequency Noise Assessment Criteria

Noise Characteristic Noise Limits at Sensitive Receptors

Low frequency noise 60 dBC measured outside the sensitive receptor, and;

The difference between the external A-weighted and C-weighted noise levels is no greater than 20 dB.

Or

50 dBZ measured inside the sensitive receptor, and;

The difference between the internal A-weighted and Z-weighted (Max LpZ,15min) noise levels is no greater than 15 dB.

Source Condition Noise 3 from the Streamlined Model Conditions, 2016.

In the event of a valid noise related complaint, the following adjustments are to be added to noise levels at sensitive receptors in the event that noise is defined as having a tonal or impulsive noise characteristic.

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Table 8 Noise Characteristic Adjustments

Noise Characteristic Adjustment to Noise

Tonal characteristic is just audible +2 dBA

Tonal characteristics is clearly audible +5 dBA

Impulsive characteristic is detectable +2 dBA to +5 dBA

Source Condition Noise 2 from the Streamlined Model Conditions, 2016.

5.2.2 Environmental Protection Policy (Noise)

The Environmental Protection Policy (Noise) is subordinate legislation under the EP Act and the environmental values to be enhanced or protected under the Policy are:

The qualities of the acoustic environment that are conducive to protecting the health and biodiversity of ecosystems, and

The qualities of the acoustic environment that are conducive to human health and wellbeing, including by ensuring a suitable acoustic environment for individuals to do any of the following sleep, study or learn or be involved in recreation, including relaxation and conversation; and

The qualities of the acoustic environment which are conducive to protecting the amenity of the community.

For a new industrial facility at a greenfield site, such as the FCF, the EPP Noise has two sets of noise levels which are to be met at the residential receptor; the background creep noise limits and the Acoustic Quality Objectives.

Noise Limits to Control Background Creep

The ‘background creep’ noise limit is designed to ensure that the level of noise in an area does not continue to increase unreasonably and to limit intrusive noise. The background creep limit is based on the existing noise environment during the daytime, evening and night-time periods.

Because the FCF is expected to emit a relatively steady, continuous noise emission, to the extent that it is reasonable to do so, noise from the FCF must not exceed the background noise level. The rating background levels for the existing noise environment are lower than the 25 dBA deemed background level from the Streamlined Model Conditions. Consistent with the DEHP guidelines, applying the monitored background levels would lead to unreasonably low emission limits that would not be practicably achievable.

For this reason the noise assessment criteria from the EPP Noise in Table 9 were derived with reference to the deemed background levels from the Streamlined Model Condition. As noted in ‘Noise 1’ from the Model Streamlined Conditions, a night-time noise limit of 28 dBA is deemed to be reasonable and meet the objectives of the EP Act and its subordinate legislation the EPP Noise.

Table 9 Background Creep Noise Criteria

Time of Day Deemed Background Level Noise Limit

Daytime 7.00 am to 6.00 pm 35 dBA 35 dBA LAeq(1hour)

Evening 6.00 pm to 10.00 pm 30 dBA 30 dBA Leq(1hour)

Night-time 10.00 pm to 7.00 am 25 dBA 25 dBA Leq(1hour)

Note Deemed background levels applied in accordance with the Streamlined Model Conditions.

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Acoustic Quality Objectives

The Acoustic Quality Objectives consider the overall level of noise at sensitive receptors, from all sources, but excluding road and rail transport noise. Where the Acoustic Quality Objectives are met, noise levels are deemed to achieve the environmental values.

The Acoustic Quality Objectives applicable at the residential receptor are presented in Table 10. The FCF operations will require continuous operation of plant; as such the assessment has adopted the 1-hour LAeq Acoustic Quality Objectives to assess the noise emissions from the facility.

Table 10 Acoustic Quality Objectives

Receptor Type Time of Day Acoustic Quality Objective

LAeq,adj,1hr LA10,adj,1hr LA1,adj,1hr

Residential dwelling (outdoors) Day time and evening 50 55 65

Residential dwelling (indoors) Daytime and evening 35 40 45

Night-time 30 35 40

Source Schedule 1 Environmental Protection Policy (noise).

5.3 Summary of Assessment Criteria for FCF Operations

The FCF will operate continuously during a 24-hour period. Where operations comply with the night-time noise limits, the FCF operations would also comply with the less stringent noise limits that apply for all other times.

The assessment of noise from the operation of the FCF has been based on the following noise limits, to provide a comprehensive assessment of noise to the applicable legislation and guidelines:

EPP Noise LAeq(1hour) 25 dBA

Streamlined Model Conditions LAeq(15minute) 28 dBA

5.4 Construction Noise Criteria

Current Queensland legislation, policies or guidelines do not prescribe numerical noise limits or noise criteria for construction activities where construction works are carried out between 6.30 am and 6.30 pm Monday to Saturday.

All construction works are expected to occur within the above hours and accordingly there would be no numerical noise limits. To provide an assessment of noise levels, the predicted construction noise levels have been compared to the existing daytime ambient noise environment.

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6 NOISE LEVELS DURING OPERATION

6.1 Predicted Operational Noise levels

The predicted noise levels at the nearest residential receptor for the FCF operations and flaring are detailed in Table 11. The predicted noise levels for the operation of the FCF are based on each gas engine exhaust being supplied with a hospital grade silencer.

Tonal noise characteristics were not identified in the predicted noise spectra at the nearest sensitive receptor and an adjustment for tonal noise was not required.

Table 11 Predicted Noise Levels for FCF Operations

Receptor FCF Operation Flaring

Neutral Weather Adverse Weather Neutral Weather Adverse Weather

Mt Saltbush Road LAeq,adj,T 17 dBA LAeq,adj,T 21 dBA LAeq,adj,T 22 dBA LAeq,adj,T 23 dBA

Note For continuous operations the ‘T’ denotes either 15 minutes or 1 hour.

It can be seen that the predicted noise levels at the nearest sensitive receptor of up to LAeq,adj,T 21 dBA during FCF operations and LAeq,adj,T 23 dBA during flaring comply with the Streamlined Model Conditions, the EPP Noise background criteria and the Acoustic Quality Objectives during all proposed operations.

6.2 Maximum (LAmax) Noise Levels – Flaring

The noise emission from the FCF is expected to be continuous and steady-state in nature. Accordingly, the noise emissions are not expected to varying significantly during normal operations. Aside from any periods when the operational load is changed, the operation of the gas flare has the potential to result in discrete noise emission events.

Based on the predicted noise levels for flaring operations of LAeq 23 dBA, the LAmax noise level from the flaring would need to be 32 dB greater than the LAeq noise emission level for LAmax noise to be at the LAmax 55 dBA noise limit.

The LAeq noise levels for the gas flare have been modelled with a sound power level of 126 dBA for continuous flaring. The maximum sound power level for the flare should therefore not exceed 158 dBA to comply with the LAmax 55 dBA noise limit. The Vendor noise emission data referenced by SLR identifies the sound power level of a ‘peak’ noise emission for the gas flare is not more than 140 dBA. It is concluded that the design and operation of the FCF would comply with the LAmax 55 dBA noise limit at all sensitive receptors.

6.3 Low Frequency Noise

The noise emission levels at the nearest receptor was analysed and the external C-weighted noise at all receptors did not exceed 60 dBC. On this basis the low frequency noise requirements of the Streamlined Model Conditions have been complied with.

7 NOISE LEVELS DURING CONSTRUCTION

Noise levels were predicted for the earthworks and plant installation phases of the FCF construction. Predicted noise levels at the nearest sensitive receptor are summarised in Table 12. The noise levels are very low, less than LAeq 10 dBA, which is indicative of the 5.8 km distance between the receptor and the site of the FCF.

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The predicted noise levels are below the existing daytime noise levels of LAeq 44 dBA and LA90 23 dBA and the construction works are not expected to adversely impact the noise environment at the nearest residence.

Based on the assessment and, in the absence of numerical noise limits for construction works between 6.30 am and 6.30 pm Monday to Saturday, specific mitigation measures to minimise construction noise are not expected to be required.

Table 12 Predicted Noise Levels from Construction

Sensitive Receptor Predicted Noise Levels from Construction, LAeq(15minute)

Earthworks FCF Plant Installation

Mt Saltbush Road residence <10 dBA <10 dBA

Note Predicted noise levels during daytime neutral weather conditions for the plant listed in Table 4.

8 RECOMMENDATIONS

The predicted noise levels for FCF operations and flaring comply with the noise requirements of the Streamlined Model Conditions and the EPP Noise at the nearest sensitive receptor. The predicted compliance is contingent on each of the gas engine exhaust being installed with an acoustic silencer. The proposed design for the FCF includes a hospital grade acoustic silencer which would achieve source noise reductions of at least 35 dBA per gas engine exhaust.

It is recommended the acoustic attenuation performance of the acoustic silencers are reviewed during the detailed design of the FCF to verify the required noise reduction performance required to maintain compliance to the noise criteria.

9 CONCLUSION

The noise assessment for the FCF has determined that the noise emission from the FCF operations and flaring can achieve the noise requirements of the Streamlined Model Conditions and the EPP Noise at all sensitive receptors. Accordingly, the noise emissions are expected to meet the objectives for health, wellbeing and acoustic amenity required by DEHP and the EPP Noise.

The outcome of this assessment is contingent on the noise emission levels from individual plant operating within the design specification and sound power levels detailed in Appendix C.

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Appendix A Report Number 620.11954-R02

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NOISE MONITORING METHODOLOGY

SLR Consulting Australia Pty Ltd

A long term baseline noise survey was undertaken in August 2017 to quantify the existing noise levels within the environment surrounding the proposed site of the FCF and in the vicinity of the sensitive receptor. The noise survey was carried out in accordance with the DEHP’s Noise Measurement Manual and included the unattended monitoring of noise levels for a period of nine days between 8 August and 16 August 2017.

Noise Monitoring Methodology

Noise monitoring was carried out at two locations indicative of the rural green-field environment and selected to be representative of the nearest sensitive receptor. The noise monitoring locations are presented in Figure 3 of this Report with photographs of the noise logger locations included below.

The noise levels were continuously monitored for the nine day monitoring period with SVAN 957 Sound Level Meters configured as noise loggers. To quantify the contribution of the existing sources of noise in the local environment the noise logging was supplemented by short-term noise measurements undertaken by SLR’s acoustic consultants. A Brüel and Kjær Type 2250 Sound Level Meter was used for the short-term attended surveys.

Each noise logger and the sound level meter were checked for calibration before and after the survey with a sound level calibrator and no significant drift in signal (±0.5 dB) was detected. All items of acoustic instrumentation employed during the noise monitoring were set to A-weighted and Fast response in accordance with the relevant Australian Standards and the Noise Measurement Manual.

The acoustic instrumentation was designed to comply with Australian Standard IEC 61672.1-2004 Electroacoustics – Sound level meters – Specifications and carry current calibration certificates.

Monitoring Location Instrumentation Survey

1 Mt Saltbush Road Brüel and Kjær Type 2250 Light Sound Level Meter (serial no. 2600507)

SVAN957 Sound Level Meter (serial no. 23241)

Continuous noise monitoring and short-term measurements

2 MT Hope Road Brüel and Kjær Type 2250 Light Sound Level Meter (serial no. 2600507)

SVAN957 Sound Level Meter (serial no. 27578)

Continuous noise monitoring and short-term measurements

3 FCF Project Site Brüel and Kjær Type 2250 Light Sound Level Meter (serial no. 2600507)

Short-term measurements only.

Location 1 Mt Saltbush Road

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Appendix A Report Number 620.11954-R02

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NOISE MONITORING METHODOLOGY

SLR Consulting Australia Pty Ltd

Location 2 Mt Hope Road

The noise measurements by SLR’s acoustic consultants were carried out over 15-minute periods at the noise logger locations on 8 and 9 August 2017. Noise measurements were conducted during the daytime (7.00 am to 6.00 pm), evening (6.00 pm to 10.00 pm) and night-time (10.00 pm to 7.00 am) periods to identify the contribution of existing sources of noise which influenced the long-term noise levels monitored by the noise loggers.

The measured noise levels and observed sources of noise are detailed in the following table.

Location Date & Time

Measured Noise Level in dB Description of Acoustic Environment

LAmax LA10 LA90 LAeq

1 Mt Saltbush Road

08/08/17 3:39 pm

72 45 27 49 Natural sources; birdsong, cattle 45 – 56 dBA Helicopter 40 dBA, peak passby 72 dBA Local road truck 43 dBA, peak passby 52 dBA No sources of industrial noise.

08/08/17 7:49 pm

48 27 23 26 Natural sources; cattle 30 – 37 dBA No sources of industrial noise.

08/08/17 11:14 pm

44 27 23 25 Natural sources; cattle 33 dBA No sources of industrial noise.

2 Mt Hope Road

09/08/17 09.24 am

62 48 40 45 Natural sources; birdsong, cattle 46 – 47 dBA Wind-blown tress 48 dBA

No sources of industrial noise.

08/08/17 9.31 pm

41 25 23 25 Distant drilling rig 25 dBA No other significant sources of noise.

08/08/17 10.00 pm

53 29 24 29 Natural sources; dogs barking and cattle 32 - 40 dBA Distant drilling rig 28 dBA

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Appendix A Report Number 620.11954-R02

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NOISE MONITORING METHODOLOGY

SLR Consulting Australia Pty Ltd

Location Date & Time

Measured Noise Level in dB Description of Acoustic Environment

LAmax LA10 LA90 LAeq

3 FCF Project Site

08/08/17 2.00 pm

57 40 28 37 Distant construction 37 – 40 dBA Wind-blown vegetation 40 – 56 dBA No sources of industrial noise.

08/08/17 8.28 pm

44 27 22 25 Natural sources; birdsong 38 – 45 dBA

Distant construction 38 dBA No sources of industrial noise.

08/08/17 10.42 pm

47 28 24 27 Natural sources; cattle peak at 47 dBA

Distant drilling rig 28 dBA

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

SLR Consulting Australia Pty Ltd

Summary of Monitored Daily Noise Levels

Date Rating Background Level (LA90) Ambient Noise Level (LAeq)

Day1 Even2 Night3 Night4 Morning5 Day1 Even2 Night3 Night4 Morning5

Location 1 Mt Saltbush Road

8 August - 22 23 23 - - 36 37 33 -

9 August 22 19 20 20 25 46 25 37 37 35

10 August 24 29 25 25 23 43 38 44 44 35

11 August 23 24 23 23 25 44 37 40 39 35

12 August 23 23 22 22 26 43 37 36 33 34

13 August 22 20 19 19 24 41 29 33 24 37

14 August 22 20 20 20 24 43 43 33 30 33

15 August 30 33 30 30 28 46 43 44 45 39

Period 23 23 23 23 25 44 38 40 39 37

Location 2 Mt Hope Road

8 August - 23 22 22 - - 48 42 42 -

9 August 22 22 24 24 25 52 58 44 44 43

10 August 26 20 21 21 28 53 43 48 48 45

11 August 23 22 24 24 25 49 44 34 30 45

12 August 22 24 23 23 28 52 49 41 40 42

13 August 21 23 20 20 27 46 35 42 41 45

14 August 24 21 22 22 25 49 36 34 26 46

15 August 27 27 21 21 25 50 39 35 24 42

Period 23 23 22 22 25 51 50 42 40 44

Note 1 Daytime 7.00 am to 6.00 pm

Note 2 Evening 6.00 pm to 10.00 pm

Note 3 Night-time 10.00 pm to 7.00 am

Note 4 Night-time 10.00 pm to 6.00 am

Note 5 Morning 6.00 am to 7.00 am

Note (-) denotes a full period of monitored data was not available due to the equipment deployment and collection time.

Note Wind speed conditions on 16 August were above 5 m/s and the monitoring data was no applied in the assessment.

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

SLR Consulting Australia Pty Ltd

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

SLR Consulting Australia Pty Ltd

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

SLR Consulting Australia Pty Ltd

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

SLR Consulting Australia Pty Ltd

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

SLR Consulting Australia Pty Ltd

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

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Appendix B Report Number 620.11954-R02

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DAILY MONITORED NOISE LEVELS

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Appendix C Report Number 620.11954-R02

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FCF SOURCE NOISE EMISSION DATA

SLR Consulting Australia Pty Ltd

Plant Item Source Height, m

Number of Items

Sound Power Level, dBA Overall SWL per Unit dBA

Octave Band Centre Frequency (Hz)

31.5 63 125 250 500 1,000 2,000 4,000 8,000

Reciprocating Compressor1 4.0 3 102 98 103 102 100 103 108 105 98 113

Screw Compressor2 4.0 3 60 78 88 94 102 106 111 111 105 115

G3516 Gas Engine3 4.0 6 90 86 93 94 101 107 109 106 95 113

G3516 Gas Engine Exhaust3 5.0 6 92 88 101 110 111 117 118 118 109 123

G3516 Gas Engine Exhaust (hospital Silencer)3 5.0 6 82 73 63 66 67 80 83 82 65 88

G3512 Gas genset (per facades and roof)4 4.0 3 40 40 55 70 71 72 65 55 64 77

G3512 Gas genset inlet4 4.0 3 47 47 65 75 75 75 81 83 88 90

G3512 Gas genset outlet4 4.0 3 62 62 71 72 72 70 74 82 90 91

TEG units5 2.0 4 49 70 82 89 96 96 94 88 77 101

TEG pump5 1.0 4 71 71 72 72 73 68 67 64 80

Gas flare6 40 1 87 105 114 119 119 121 117 113 107 126

Note 1 SLR source noise database from previous central processing facility assessment (confidential project).

Note 2 SLR source noise database from previous central processing facility assessment (confidential project).

Note 3 Manufacturer supplied data for example CATG3516 unit.

Note 4 Manufacturer supplied data for example G3512 unit.

Note 5 SLR source noise database from previous central processing facility assessment (confidential project).

Note 6 SLR source noise database from previous central processing facility assessment (confidential project).

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Appendix D Report Number 620.11954-R02

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ANALYSIS OF METEOROLGICAL DATA

SLR Consulting Australia Pty Ltd

Annual Wind Rose Data

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Appendix D Report Number 620.11954-R02

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ANALYSIS OF METEOROLGICAL DATA

SLR Consulting Australia Pty Ltd

Seasonal Wind Rose Data for Wind Speed ≤ 3m/s

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Appendix D Report Number 620.11954-R02

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ANALYSIS OF METEOROLGICAL DATA

SLR Consulting Australia Pty Ltd

Analysis of Wind Speeds ≤ 3m/s

Vector Summer Autumn Winter Spring

Day Even Night Day Even Night Day Even Night Day Even Night

N 4% 7% 13% 5% 7% 13% 4% 5% 8% 6% 14% 21%

NNE 5% 12% 21% 9% 8% 14% 7% 7% 10% 9% 14% 15%

NE 5% 8% 12% 9% 4% 7% 6% 4% 5% 8% 4% 5%

ENE 7% 4% 4% 6% 0% 3% 5% 1% 3% 4% 0% 2%

E 9% 2% 4% 4% 1% 3% 5% 2% 4% 2% 1% 2%

ESE 7% 3% 4% 3% 2% 4% 4% 3% 5% 2% 2% 2%

SE 5% 2% 2% 3% 1% 2% 4% 2% 2% 1% 1% 1%

SSE 4% 0% 2% 3% 0% 0% 5% 0% 0% 2% 0% 0%

S 3% 0% 1% 5% 0% 0% 5% 0% 0% 2% 0% 1%

SSW 2% 1% 1% 3% 0% 0% 5% 1% 1% 2% 0% 2%

SW 1% 2% 3% 3% 3% 6% 4% 4% 11% 3% 3% 6%

WSW 2% 3% 8% 4% 9% 13% 3% 8% 17% 3% 7% 9%

W 2% 3% 6% 3% 7% 8% 2% 5% 9% 2% 4% 5%

WNW 2% 1% 2% 2% 1% 2% 2% 1% 2% 2% 0% 2%

NW 2% 1% 1% 2% 1% 4% 2% 1% 3% 3% 1% 4%

NNW 3% 1% 2% 3% 2% 7% 2% 2% 5% 4% 4% 12%