APPENDIX 5: NOISE COMPLIANCE REPORTING QUARTERLY REPORTS (Q1, Q2 AND Q3) KEYSBROOK MINERAL SANDS PROJECT COMPLIANCE ASSESSMENT REPORT 2016

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1 MZI RESOURCES LIMITED KEYSBROOK MINERAL SANDS PROJECT COMPLIANCE ASSESSMENT REPORT 2016 APPENDIX 5: NOISE COMPLIANCE REPORTING QUARTERLY REPORTS (Q1, Q2 AND Q3) Compliance Assessment Report 2016 FINAL.docx

2 KEYSBROOK ENVIRONMENTAL NOISE COMPLIANCE REPORTING Q MZI RESOURCES LTD Rev2-18.Feb Perth Brisbane Kuala Lumpur Bangkok Noise Vibration Corrosion Safety Reliability Integrity Training Asset Support Design Support Troubleshooting

3 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q DOCUMENT CONTROL & REVIEW INFORMATION Client: Client Contact: MZI Resources Ltd Marc Morris SVT Contact: SVT Office: Peter Glorie Perth SVT Job No: SVT Document No: Rev2-18.Feb.2016 Rev Description Prepared Reviewed Date 2 Receptor List Updated Peter Glorie Jim McLoughlin 18.Feb Issued for Client Review Peter Glorie Wayne Seeto 15.Feb.2016 SVT Engineering Consultants ABN: SVT Perth (HEAD OFFICE) SVT Brisbane Office SVT Kuala Lumpur Office SVT Bangkok Office 112 Cambridge Street West Leederville WA 6007 Australia Level 5, 320 Adelaide St Brisbane, Queensland 4000 Australia SVT Engineering Malaysia Sdn Bhd No A-2-6, Jalan SS7/13B, Aman Seri, Kelana Jaya, Petaling Jaya, Selangor, Malaysia SVT Engineering Consultants (Thailand) MD Tower Bangna Complex Bangna, Bangkok 10260, Thailand Tel: + 61 (0) Fax: + 61 (0) mailbox@svt.com.au Tel: +61 (0) Fax: +61 (0) mailbox@svt.com.au Tel: Fax: mailbox@svt.com.au Tel: Fax: mailbox@svt.com.au Doc: Rev2-18.Feb.2016 Page I

4 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q EXECUTIVE SUMMARY Keysbrook Leucoxene Pty Ltd (KLPL) operate their Keysbrook Mineral Sands Project under a Noise Management Plan (NMP) to ensure that the mining operations and production activities comply with the provided licence conditions. The licence conditions require quarterly reporting of noise monitoring, including assessment of compliance with assigned levels. Keysbrook operations commenced on the 22 nd October 2015, and therefore the first quarter of mining operations was from the 22 nd October 2015 to the 22 nd January SVT was commissioned by KLPL to undertake the required environmental noise reporting for this period. The objective of this assessment is to determine if the mining noise emissions have complied with the licence conditions. A BarnOwl noise logging station is located to the southwest of the mine site (across the road from the residence at Lot 20, Hopelands Rd) for monitoring and management of mining noise emissions. During the three months, the Barn Owl noise monitoring system was available and recording data for approximately 60% of the time. Of the total data set available, 6% of samples were identified where the directionality of the noise indicates a potential that the mine site was a cause of exceedance of the assigned levels. For these periods, recorded sound files (where available) were reviewed Of the sound files reviewed, there were no periods identified where mine site noise was the dominant audible source. Sound files were not available for a number of periods where a potential exceedance was identified based on the directional data. Most of these samples were identified as unlikely exceedances, as the wind direction was not in a favourable direction for minesite noise propagation towards the receptor. An attended measurement survey indicated that noise from fixed plant and mobile equipment contains tonal characteristics in the 80 Hz and 100 Hz third-octave bands. These have the potential to cause tonality at residences. However, it was not possible to assess the tonality of mining operations from the Barn Own noise monitoring system as the system does not currently record spectral data. SVT recommends that the BarnOwl noise monitoring system is setup to capture spectral data to: assist in identifying if mining noise is the cause of detected exceedances; and for the assessment of tonality. Noise modelling of a current representative mining scenario (mining on Lot 6) was also undertaken. Under worst-case meteorological conditions, predicted exceedances were identified at three northern receptors. However, SVT understands that KLPL have amenity agreements with these residents. Noise model predictions for all other residences, including the residence located at Lot 20, Hopelands Rd, indicate that compliance is achieved. The noise monitoring data available, combined with noise modelling, indicate that the Keysbrook mine site has achieved compliance in the first three months of operation. KLPL are currently in the process of implementing MaestroMine, a noise management planning tool that will enable them to better plan activities to achieve predicted noise compliance over varying Doc: Rev2-18.Feb.2016 Page II

5 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q meteorological conditions. With MaestroMine in place, and with the continued use of the BarnOwl noise monitoring system, KLPL should be better able to manage their environmental noise emissions. Doc: Rev2-18.Feb.2016 Page III

6 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q TABLE OF CONTENTS DOCUMENT CONTROL & REVIEW INFORMATION... I EXECUTIVE SUMMARY... II TABLE OF CONTENTS... IV 1. INTRODUCTION ASSIGNED NOISE LEVELS Corrections for Characteristic of Noise LOGGING NOISE DATA ANALYSIS Keysbrook Noise Logging Station Meteorological Data Methodology of Data Analysis Assessment of Logged Data NOISE MODELLING Noise Modelling Scenarios Meteorology Model Verification Modelling Results and Compliance Assessment ATTENDED MEASUREMENTS CONCLUSION DISCUSSION AND RECOMMENDATIONS APPENDIX A MEASURED SOUND POWER LEVELS... A-1 APPENDIX B NOISE CONTOURS... B-1 APPENDIX C DIRECTIONAL MONITORING REPORT SAMPLE... C-1 Doc: Rev2-18.Feb.2016 Page IV

7 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q INTRODUCTION Keysbrook Leucoxene Pty Ltd (KLPL) operate their Keysbrook Mineral Sands Project under a Noise Management Plan 1 (NMP) to ensure that the mining operations and production activities comply with the provided licence conditions 2,3. The licence conditions require quarterly reporting of noise monitoring, including assessment of compliance with assigned levels. The Keysbrook mine operates continuously, 24 hours per day, 7 days per week. The mine site is located approximately 70 km south of Perth. A BarnOwl noise logging station is located to the southwest of the mine site (across the road from a residence) for monitoring and management of mining noise emissions. Keysbrook operations commenced on the 22 nd October 2015, and therefore the first quarter of mining operations was from the 22 nd October 2015 to the 22 nd January SVT was commissioned by KLPL to undertake the required environmental noise reporting for this period. The objective of this assessment is to determine if the mining noise emissions have complied with the licence conditions. To achieve the objective the following activities have been undertaken: Review and assessment of three months of BarnOwl noise monitoring data and weather data; Undertake an attended noise measurement survey in accordance with the existing Noise Monitoring Plan 4 ; Undertake noise modelling of a representative current mining scenario (mining on Lot 6) and predict worst case noise levels received at nearby residential receptors; and Assess the compliance from both the modelling and monitoring data. Figure 2-1 presents an aerial view of the proposed mine site and surrounding area including the closest residences (lots) and the location of the BarnOwl noise monitoring station. 1 Keysbrook Mineral Sands Project Noise Management Plan, 20 October Ministerial Statement No. 810, 19 October 2009, Statement That a Proposal May Be Implemented Pursuant to the Provisions of the Environmental Protection Act Works Approval W5386/2013/1. 4 Noise Monitoring Plan, August 2011, b, Lloyd George Acoustics Doc: Rev2-18.Feb.2016 Page 5

8 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q ASSIGNED NOISE LEVELS Noise management in Western Australia is implemented through the Environmental Protection (Noise) Regulations 1997 (the Regulations) which operate under the Environmental Protection Act The Regulation specify maximum noise levels (assigned noise levels) which are the highest noise levels that can be received at noise-sensitive (residential), commercial and industrial premises. Table 2-1 presents the L A10 site specific assigned noise levels for the nearest noise sensitive premises (as presented in the Noise Management Plan). There are only two neighbouring residences that have an influencing factor that are applied to the assigned level. The L A10 assigned level is quoted in the table as this is considered to be the most stringent for KLPL operations. A map presenting all nearby noise sensitive receptors is presented in Figure 2-1. Table 2-1: Assigned noise levels (LA10) in db(a) Assigned Noise levels (LA10) in db(a) Noise Sensitive Receptor NSR 14 NSR 1 Address Lot 104 Westcott Rd, Keysbrook Lot 20 Hopelands Rd, North Dandalup All other sensitive receptors Influencing Factor in db 0700 to 1900 hours Monday to Saturday 1900 to 2200 hours all days and 0900 to 1900 hours Sunday and public holidays 2200 hours on any day to 0700 hours Monday to Sunday and 0900 hours Sunday and public holidays The BarnOwl noise monitoring station ls located close to (across the road from) Lot 20 Hopelands Rd (see Section 3.1). Therefore, the assigned noise levels for this residence form the basis of the assessment of compliance for the monitoring data. Doc: Rev2-18.Feb.2016 Page 6

9 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Figure 2-1: Noise Sensitive Receptors (Google Maps) 2.1 Corrections for Characteristic of Noise Noise levels at the receiver are required to be adjusted if the noise exhibits intrusive or dominant characteristics, i.e. if the noise is impulsive, tonal, or modulating. Table 2-2 presents the adjustments incurred for noise that exhibits intrusive or dominant characteristics. That is, if the noise is assessed as having tonal, modulating or impulsive characteristics, then the measured or predicted noise levels are adjusted, by the amounts given in Table 2-2. The adjusted noise levels must now comply with the assigned noise levels. Regulation 9 sets out objective tests to assess whether the noise is taken to be free of these characteristics. Table 2-2: Adjustments for intrusive or dominant noise characteristics. Adjustment where noise emission is not music these adjustments are cumulative to a maximum of 15 db Where tonality is present Where modulation is present Where impulsiveness is present +5 db +5 db +10 db Doc: Rev2-18.Feb.2016 Page 7

10 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q LOGGING NOISE DATA ANALYSIS 3.1 Keysbrook Noise Logging Station The Keysbrook noise monitoring station utilises a directional noise logger, known as a BarnOwl. The BarnOwl 5 utilises a three microphone array that enables the system to approximately determine the direction of the sound source. Figure 3-1 indicates the location of the BarnOwl monitoring station, relative to the Wet Concentrator Plant (WCP) and the Mining Field Unit (MFU). Figure 3-1: Location of Keysbrook Logging Station (Google Maps) The logging period of the BarnOwl was set to 15 minutes. When the system detects an exceedance of the trigger level, a 30 second sound recording is captured and stored. The logged data available includes levels recorded for: Total All Sources Angle of Interest The total sound pressure level from a single microphone. The total noise level calculated by the directional system algorithm. The metric is a good indicator to use to see how well Leq is measuring and it excludes sources with no measureable direction, such as insect noise, or directly overhead aircraft noise. The noise level calculated by the directional system algorithm, including only noise from the direction of the minesite. 5 Supplied by SoundScience Pty Ltd Doc: Rev2-18.Feb.2016 Page 8

11 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Limitations of the BarnOwl system include: The system does not record spectral data; The system does not meet the sound level meter requirements of the Environmental Protection (Noise) Regulations 1997; The system cannot be calibrated by a NATA certified laboratory (although it is field calibrated); The directional system cannot distinguish between direct noise sources, and noise reflections; The directional system has a limited frequency range; and The system cannot filter out wind or rain noise. From the 18 th November to 16 th December 2015, the BarnOwl was disabled, and did not record data. During this period, a replacement non-directional noise monitor was utilised, which recorded data from the 27 th November to 15 th December However, this data is non-directional, and non-spectral, and therefore SVT cannot establish if exceedances are mine-site related. 3.2 Meteorological Data KLPL provided the weather data used in this assessment, which was recorded from the Keysbrook weather station located on the mining property. The weather data provides average levels recorded over a 15 minute period. 3.3 Methodology of Data Analysis In undertaking the noise assessment, SVT only included conditions likely to result in noise exceedences. Figure 3-2 presents the analysis flowchart. Detailed descriptions of steps (A) through to (F) are provided below. (A) Total Noise Levels LAS10 If the L AS10 is below the assigned noise levels, compliance is achieved. If the L AS10 exceeds the assigned noise levels, further filters will apply. (B) Wind Speeds If the wind speed exceeds 5m/s, the level is most likely dominated by wind induced noise, and therefore excluded from further analysis. (C) Noise Exceedance From Angle of Interest If noise from the direction of mine site (Angle of Interest) exceeds the assigned level, the period will be considered a potential exceedance, and audio will be reviewed (if available, see step (E)). If this condition does not occur, the data is not excluded yet as there is still the potential for a minesite related noise exceedance, where the noise characteristic is beyond the limits of the directional monitoring system. Doc: Rev2-18.Feb.2016 Page 9

12 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q (D) Majority of Noise From Direction of Mine If the noise level within the Angle of Interest is within 3 db of the level from All Sources, this means that the majority of the noise captured is from the direction of the mine site. The period will be considered a potential exceedance, and audio will be reviewed (if available, see step (E)). (E) Audio and Directional Verification Where available, the audio recording will be reviewed. This entails listening to the alert generated sound recording to determine whether the noise was likely to have been generated from mining activities or whether the noise was more likely to have been generated locally (such as from birds or trees). Where equipment noise is audible, but may not be mine site related, the Barn Owl directional reports will be reviewed (a directional report sample is provided in Appendix C). (F) Favourable Wind Directions An additional criterion has been applied to periods where audio data is not available. If the wind direction is favourable for noise propagation from mining sources towards the receiver, the period is considered a possible exceedance. Doc: Rev2-18.Feb.2016 Page 10

13 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Figure 3-2: Process of Analysis of Logged Data. 3.4 Assessment of Logged Data Fifteen minute data samples provided by KLPL from the Keysbrook noise logging station, from 22 nd October 2015 to 22 nd January 2016, were assessed according to the methodology described in section 3.3. A summary of the assessment and data filtering steps is provided in Table 3-1. Doc: Rev2-18.Feb.2016 Page 11

14 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Table 3-1 : Data sample breakdown of assessment Filter Step Total number of samples for time period from 22 nd October 2015 to 22 nd January 2016 Number of Samples Remaining After Filter Step 5294 (A) Total Noise Level Exceed Assigned Levels 3036 (B) Wind speeds greater than 5m/s 2939 (C) Noise From Angle of Interest Exceed Assigned Levels 169 (D) Majority of Noise From Direction of Mine 163 Audio Available 65 (E) Positive Verification of Mining Noise 0 (F) Favourable Wind Direction 154 No Exceedance 4962 Potential Exceedance But Unlikely 178 Potential Exceedance 154 Verified Exceedance 0 Table 3-2 lists the interval samples where sound files were reviewed. It was found that of the 65 samples (35 periods) assessed, only one period (03:45 04:15 on 08/01/2016) contains truck noise that could be mine site related. However, a review of the directional report for this period indicates a high level of noise to the west, demonstrating that the truck was likely travelling on the adjacent driveway or Hopelands Road (see directional report provided in Appendix C). Table 3-2: Audio verification samples Date Time Period LA10 In dba Condition (C) or (D) SVT Comments MZI Comments 22/10/ :30 05: C Birds Birds 22/10/ :00 07: C Birds and road traffic Birds, wind and tyre roar 23/10/ :00 06: C Birds Birds 25/10/ :45 01: C Wind with gusts Wind Doc: Rev2-18.Feb.2016 Page 12

15 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date Time Period LA10 In dba Condition (C) or (D) SVT Comments MZI Comments 25/10/ :45 03: C Wind with gusts Wind 25/10/ :45 05: C Wind with gusts Wind 25/10/ :30 07: C Wind and birds Wind and birds 25/10/ :45 08: C Wind & road traffic Wind and motor bike 25/10/ :30 09: C Wind & birds Wind and birds 25/10/ :15 18: C Birds Birds and Vehicle 26/10/ :15 06: C Birds 27/10/ :00 05: C Wind with gusts Wind 28/10/ :15 03: C Wind Wind 28/10/ :00 05: C Wind and birds Wind and birds 29/10/ :00 06: C Birds 30/10/ :30 06: C Birds 31/10/ :00 06: C Birds 3/11/ :00 06: C Birds 4/11/ :45 06: C Birds 4/11/ :45 06: C Birds 27/11/ :00 12: C Wind & Traffic 8/1/ :30 00: D Wind Wind and trees 8/1/ :00 01: D Wind Trees and Plant 8/1/ :00 03: D Wind and birds Wind and trees 8/1/ :45 04: D Wind and truck Truck and wind 8/1/ :00 05: D Birds and thunder Birds and thunder 8/1/ :45 06: D Birds and thunder Birds and thunder 8/1/ :45 08: D Birds and thunder Birds and trees 8/1/ :45 12: D Wind and birds 8/1/ :45 02: D Birds and thunder 9/1/ :45 07: C Birds 14/1/ :30 00: C Wind and birds Doc: Rev2-18.Feb.2016 Page 13

16 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date Time Period LA10 In dba Condition (C) or (D) SVT Comments MZI Comments 14/1/ :15 02: C Wind and birds 14/1/ :00 04: C Wind and birds 14/1/ :45 06: C Wind and birds Doc: Rev2-18.Feb.2016 Page 14

17 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q NOISE MODELLING An acoustic model developed using the SoundPlan v7.4 program was built based on the recent sound power measurements 6,7 and verified using measurement data presented in section 5. The CONCAWE 8,9 prediction algorithm was selected for this study. The acoustic model does not include noise emissions from any source other than the mining operations. Therefore, noise emissions from road traffics, animals, domestic sources, etc are excluded from the modelling. 4.1 Noise Modelling Scenarios During the first three months of mine site operation, mining activities occurred in Lot 6. Along with fixed plant, the following mobile equipment was included in the noise model: 1 X Excavator; 3 X Haul Trucks; 1 X Loader; and 1 X Watercart. The measured sound power levels of the mobile equipment and fixed plant are presented in Appendix A. 4.2 Meteorology SoundPlan calculates noise levels for defined meteorological conditions. In particular, temperature, relative humidity, wind speed and direction data are required as input to the model. For the noise modelling SVT has used the worst case meteorological conditions suggested by the EPA Guidance note No 8 for assessing noise impact from new developments as the upper limit of the meteorological conditions investigated. Table 4-1 presents the worst-case meteorological conditions for noise emission from the mine site. 6 Sound Power Measurement of Mobile equipment, SVT Report , 16 November Sound Power Measurement of Fixed equipment, SVT Report , 16 November CONCAWE (Conservation of Clean Air and Water in Europe) was established in 1963 by a group of oil companies to carry out research on environmental issues relevant to the oil industry. 9 The propagation of noise from petroleum and petrochemical complexes to neighbouring communities, CONCAWE Report 4/81, 1981 Doc: Rev2-18.Feb.2016 Page 15

18 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Table 4-1: Worst-case meteorological conditions for noise emission from the mine site. Time of day Temperature Celsius Relative Humidity Wind speed Pasquill Stability Category Day ( ) 20º Celsius 50% 4 m/s E Evening ( ) 20º Celsius 50% 4 m/s E Night ( ) 15º Celsius 50% 3 m/s F 4.3 Model Verification The acoustic model has been verified based on the measurement data presented in section 5. The level difference between the predicted and measured noise levels ranges from -1.4 db to 4.0 db, with an average of 1.6 db, at selected attended measurement locations surrounding the mine site. A positive level difference means that the prediction is higher than the measured noise level, and therefore slightly conservative. 4.4 Modelling Results and Compliance Assessment Table 4-2 presents the results of noise modelling for worst-case meteorological conditions. The table also provides the assigned levels, and indicates where exceedances are predicted. Note that as the meteorological conditions are identical for daytime and evening time, and that no exceedances were identified for the daytime period, only the evening and night columns are presented. Full compliance is predicted for day-time operations. Worst-case predicted noise levels exceeding the assigned noise levels are expressed in bold italic. Exceedances have been predicted at three residences: Lot 101, 104 and 105 Hopelands Rd. These residents may experience evening-time exceedances of up to 2.5 db, and night-time exceedances of up to 7.7 db. Predictions indicate that the Lot 20 Hopelands Rd residence is compliant. Figure 3 in Appendix C presents the worst-case night-time noise level contours. Table 4-2: Compliance assessment. Noise Sensitive Receptor Address LA10 Assigned Noise Levels in db(a) Predicted Worst-case Noise Levels in db(a) Evenings Nights Evenings Nights NSR 1 Lot 20 Hopelands Rd NSR 2 Lot 211 Hopelands Rd NSR 3 Lot 212 Hopelands Rd NSR 4 Lot 505 St Blaise Grove NSR 5 Lot 506, St Blaise Grove Doc: Rev2-18.Feb.2016 Page 16

19 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Noise Sensitive Receptor Address LA10 Assigned Noise Levels in db(a) Predicted Worst-case Noise Levels in db(a) Evenings Nights Evenings Nights NSR 6 Lot 508, St Blaise Grove NSR 7 Lot 1, Readheads Rd NSR 8 Lot 12 Readheads Rd NSR 9 Lot 100, Atkins Rd NSR 10 Lot 301 Atkins Rd NSR 11 Lot 104 Atkins Rd NSR 12 Lot 52, Westcott Rd NSR 13 Lot 101, Westcott Rd NSR 14 Lot 104 Westcott Rd NSR 15 Lot 105 Westcott Rd NSR 16 Lot 57 Elliott Rd NSR 17 Lot 64 Hopelands Rd Doc: Rev2-18.Feb.2016 Page 17

20 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q ATTENDED MEASUREMENTS The Noise Monitoring Plan 10 prepared for the Keysbrook operation details a measurement procedure for daytime measurement of mining operations. The procedure includes noise measurement at numerous positions surrounding equipment, to capture noise levels in varying wind conditions. Measurement locations specified are between 50m and 1500m from operations. Appendix D contains the plan of the nominal noise measurement locations. This attended measurement survey was completed on the 29 th January Weather conditions on the day were fine, with south-easterly winds in the morning and early afternoon, and southwesterly winds later in the afternoon. During the attended measurements, all fixed plant equipment was operating, and the following operating mobile equipment was observed: 1 X Excavator; 2 X Haul Trucks; 1 X Loader; and, 1 X Watercart. Table 5-1 presents a summary of the noise measurements undertaken, and Figure 5-1 presents a map showing the measurement locations. SVT has reviewed the spectral content of the measurements, and has found that noise from fixed plant, and mobile equipment, does contain tonal characteristics, particularly in the 80 Hz and 100 Hz 1/3 Octave bands. These characteristics have the potential to cause tonality (as defined by the regulations) at residences. Table 5-1: Summary of Attended Measurements Measurement Number Nominal Location Comments Wind Conditions LAS10 LAS90 1 WCP 250m NW WCP audible and clear. Mobile equip also audible m/s SE Wind WCP 250m NE Dominant source was nearby booster pump. Workshop radio also audible m/s SE Wind WCP 250m SE WCP audible and clear. Birds m/s SE Wind WCP 250m SE Floc plant running and audible 2.5-4m/s SE Wind WCP 250m SW WCP audible and clear. Planes operating in area. Insects. 6 WCP 750m SW WCP audible, but very distant. Birds. 7 WCP 750m SE WCP in-audible. Mining noise more prominent. Calm Calm during measurement m/s SE Wind Noise Monitoring Plan, August 2011, b, Lloyd George Acoustics Doc: Rev2-18.Feb.2016 Page 18

21 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Measurement Number Nominal Location Comments Wind Conditions LAS10 LAS90 8 MFU 1500m SW Mining barely audible. Trees rustling m/s SE Wind WCP750m NE WCP, Mining and Pump just audible. Changing wind between SE and SW WCP 750m NW WCP audible, truck loading in progress too. Birds, Crows 2-3.5m/s SE MFU 50m SW MFU, Loader on ROM, Truck on ROM 0-2m/s SE MFU 150m SW MFU, Loader on ROM, Truck on ROM 0-2m/s SE MFU 150m SE MFU, Loader on ROM, Truck on ROM 0-2m/s SE MFU 50m SE MFU, Loader on ROM, Truck on ROM 0-2m/s SE MFU 50m NE MFU, Loader on ROM, Truck on ROM 0-2m/s SE MFU 150m NE Loader on ROM, Truck on ROM 0-2m/s SE MFU 150m NW Loader on ROM, Truck on ROM 0-2m/s SE MFU 50m NW MFU, Loader on ROM, Truck on ROM 0-2m/s SE MFU 250m NE Loader on ROM, Truck on ROM 1-3m/s SE m from Excavator Excavator working on bench 1-3m/s SE MFU 500m NE Mining barely audible m/s SE MFU 750m NW Excavator dominant m/s SE MFU 500m NW Excavator dominant m/s SE MFU 250m SW MFU just audible over wind noise m/s SW MFU 500m SW Wind noise only m/s SW MFU 1000m NE MFU just audible over wind noise 6-8m/s SW MFU 1500m NE Wind noise only 6-8m/s SW MFU 1000m SW Wind noise only (no measurement taken) m/s SW - - Doc: Rev2-18.Feb.2016 Page 19

22 Figure 5-1 Map of Attended Measurement Locations Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Doc: Rev2-18.Feb.2016 Page 20

23 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q CONCLUSION For the first three months of operation at Keysbrook (22 nd October 2015 to the 22 nd January 2016), the Barn Own noise monitoring system was available and recording data for a total of 1324 hours, approximately 60% of the time. The total data set included 5, minute samples, for which 332 samples were identified where the directionality of the noise indicates potential that the mine site was a cause of exceedance of the assigned levels. For these periods, recorded sound files (where available) were reviewed. Of the 65 sound files reviewed, there was no periods identified where mine site noise was the dominant audible source. Sound files were not available for the remainder of periods where a potential exceedance was identified based on the directional data. Most of these samples were identified as unlikely exceedances, as the wind direction was not in a favourable direction for minesite noise propagation towards the receptor. The attended measurement survey indicated that noise from fixed plant and mobile equipment contains tonal characteristics in the 80 Hz and 100 Hz third-octave bands. These have the potential to cause tonality at residences. However, it was not possible to assess the tonality of mining operations from the Barn Own noise monitoring system as the system does not currently record spectral data. Noise modelling of a current mining scenario (mining on Lot 6) was also undertaken. Under worstcase meteorological conditions, predicted exceedances were identified at three northern receptors. However, SVT understands that KLPL have amenity agreements with these residents. Noise model predictions for all other residences, including the residence located at Lot 20, Hopelands Rd, indicate that compliance is achieved. Statement of Compliance The noise monitoring data available, combined with predictions from noise modelling, indicate that the Keysbrook mine site has achieved compliance in the first three months of operation. Doc: Rev2-18.Feb.2016 Page 21

24 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q DISCUSSION AND RECOMMENDATIONS Whilst the conclusions of this report indicate that compliance has been achieved in the first quarter of operations (Q1 2016), it is likely that noise management and achieving compliance, may be more difficult during the autumn and winter months, as meteorological conditions become more favourable for noise propagation, particularly at night time. Additionally, as mining progresses towards the south, noise sources will be closer to the Lot 20, Hopelands Rd residence. KLPL are currently in the process of implementing MaestroMine, a noise management planning tool that will enable them to plan activities to achieve predicted noise compliance over varying meteorological conditions. With MaestroMine in place, and with the continued use of the BarnOwl noise monitoring system, KLPL should be better able to manage their environmental noise emissions. However, SVT recommend that the BarnOwl noise monitoring system is setup to capture spectral data, to assist in identifying if mining noise is the cause of detected exceedances, and for the assessment of tonality. Doc: Rev2-18.Feb.2016 Page 22

25 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX A MEASURED SOUND POWER LEVELS Measured sound power levels for fixed plant and mobile equipment. Equipment Octave Band Sound Power Levels in db(l) k 2k 4k 8k Fixed Plant O/A db(a) Wet Plant MFU MFU Booster Pump Discharge Point Process Water Pumps Production Bore Pump Production Bore Pump Raw Water Pump Slimes Discharge Point Slimes Return Pump Tails 1 Booster Pump Tails 2 Booster Pump Tails Return Pump Tails Return Pump Mobile Equipment Watercart AWC Excavator PC1250SP Haul Truck Haul Truck Haul Truck Loader LDW Doc: Rev2-18.Feb.2016 Page A-1

26 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX B NOISE CONTOURS Doc: Rev2-18.Feb.2016 Page B-1

27 Noise Levels in db(a) = 25 = 30 = 35 = 40 = 45 = 50 = 55 = Figure 3: Worst-case night-time noise level contours.

28 Client: MZI Resources Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX C SAMPLE DIRECTIONAL MONITORING REPORT Doc: Rev2-18.Feb.2016 Page C-1

29 Directional Noise Alert at BarnOwl of 1 18/02/2016 3:08 PM Directional Noise Alert Report Location BarnOwl 1 Time 08/01/ :00:00 Alert Info Start Time End Time Alert Value Threshold Severity Activity 08/01/ :00:00 08/01/ :00: db 35 db Exceedance 99 % Alert Values L eq (db) L 10 (db) L 50 (db) Total All Sources L 90 (db) Activity Angle Of Interest % Directional Noise View The plot shows noise source values (in db) and there angular direction. The angle of interest is indicated by yellow lines. The sources inside the angle of interest are shown in red lines. The other sources are shown in green lines. Range of Access Road Range of Mining Processing Trees Hopelands Road (Truck) Trees Wind 2m/s

30 KEYSBROOK ENVIRONMENTAL NOISE COMPLIANCE REPORTING Q KEYSBROOK LEUCOXENE PTY LTD Rev3-20.May Perth ǀ Brisbane ǀ Melbourne Noise ǀ Vibration ǀ Corrosion ǀ Pressure Safety ǀ Reliability ǀ Integrity ǀ Training Asset Support ǀ Design Support ǀ Troubleshooting

31 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q DOCUMENT CONTROL & REVIEW INFORMATION Client: Client Contact: Keysbrook Leucoxene Pty Ltd Marc Morris SVT Contact: SVT Office: Peter Glorie Perth SVT Job No: SVT Document No: Rev3-20.May.2016 Rev Description Prepared Reviewed Date 3 Noise Modelling Added Peter Glorie Greg Stewart 20.May Client Feedback Incorporated Peter Glorie Greg Stewart 16.May Issued for Comment Roy Ming Greg Stewart 5 May 2016 SVT Engineering Consultants ABN: SVT Brisbane Office SVT Perth (HEAD OFFICE) SVT Melbourne Office Level 10, 320 Adelaide St Brisbane, Queensland 4000 Australia Tel: +61 (0) Fax: +61 (0) mailbox@svt.com.au 112 Cambridge St West Leederville WA 6007 Australia Tel: + 61 (0) Fax: + 61 (0) mailbox@svt.com.au SVT Engineering Consultants Wood Group Kenny Level 3, 171 Collins St, Melbourne VIC 3000 Australia Tel: Fax: mailbox@svt.com.au Doc: Rev3-20.May.2016 Page I

32 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q EXECUTIVE SUMMARY Keysbrook Leucoxene Pty Ltd (KLPL) operate their Keysbrook Mineral Sands Project under a Noise Management Plan (NMP) to ensure that the mining operations and production activities comply with the provided licence conditions. The licence conditions require quarterly reporting of noise monitoring, including assessment of compliance with assigned levels. The first quarter mining operation was ended on the 22 nd January 2016 and its noise compliance assessment has been presented in a SVT report 1. The second quarter mining operation was from 23 rd January 2016 to 22 nd April SVT was commissioned by KLPL to undertake the compliance assessment for this period. The objective of this assessment is to determine if the mining noise emissions have complied with the licence conditions. A BarnOwl noise logging station is located to the southwest of the mine site (across the road from the residence at Lot 20, Hopelands Rd) for monitoring and management of mining noise emissions. The Barn Owl noise monitoring system recorded the data for 100% of the three month period. A filtering process was applied to the total data set to identify 38 periods where there is a higher probability of mine site noise causing an exceedance of the assigned levels. These 38 periods were investigated in further detail, with the following findings: Issues with the data and audio recordings were identified on the mornings of the 14 th March and 18 th March, although the available data indicates that the exceedances are not related to mine site noise; and, The data on the morning 16th April (12:30 am to 2:15 am), indicates that the majority of the noise was from the direction of the mine site, although there was also a large amount of noise from sources where a direction was not determined. Angle of Interest 1 hour L AS10 levels were has high as 33.4 db(a) during this period (the Assigned Level at the receptor is 36 db(a) L AS10 ). Based on this SVT initially considered this period a medium probability of exceedance, as an exceedance may be possible given the limitations of the monitoring system. No other periods of potential exceedance were identified from the data available. Noise modelling was undertaken to represent the mining that took place at Keysbrook on the morning of the 16th April. The modelling was completed conservatively using worst case night time meteorological conditions. The model predicted the noise to be almost 4 db below the Assigned Level at Lot 20 Hopelands Rd. The predicted levels were consistent (within 1.5 db) with the angle of interest measurements for the same period. The detailed modelling has added confidence to the finding that while noise levels from the mine approached the Assigned Levels on the morning of the 16 April, it is likely that they did not exceed the Assigned Levels. Based on the available data, and respecting the limitations of the monitoring system, there were no periods of assigned level exceedance within the quarter that could be attributed to mining noise. 1 Environmental Noise Compliance Reporting Q1 2016, SVT Report (Report NO: Rev2-18.Feb.2016). Doc: Rev3-20.May.2016 Page II

33 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Recommendations As outlined in section 4, KLPL have already taken numerous steps to improve the noise monitoring system outputs, and reduce their noise emissions to the community. Most of these steps have been recently implemented, and therefore improvements should be effective for the next quarter s noise compliance assessment. However, SVT have the following further recommendations: In the absence of 1/3 octave data available from the Barn Owl noise monitoring system, to assess the risk of tonality in the mine s noise emissions, SVT recommends that KLPL undertake a short term noise monitoring or attended measurement exercise. This would involve capturing the mine s noise during the night time, at a location around the db(a) contour, and assessing the results for tonality (in accordance with the regulations). Obtain clarification from the Barn Owl supplier on the calculation method used to calculate the L AS10 on directional data (All Directionally Identifiable Sources and Angle of Interest). Understanding the method would give us greater confidence in these results. Additionally request if the number of samples in each L 10 calculation could be presented in the raw output data. KLPL should undertake the maintenance steps outlined in the Barn Owl user s manual on a regular basis to ensure the system maintains performance and calibration. Doc: Rev3-20.May.2016 Page III

34 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q TABLE OF CONTENTS DOCUMENT CONTROL & REVIEW INFORMATION... I EXECUTIVE SUMMARY... II TABLE OF CONTENTS... IV 1. INTRODUCTION REGULATIONS AND LICENCE CONDITIONS Assigned Levels Noise Monitor Placement Corrections for Characteristic of Noise LOGGING NOISE DATA ANALYSIS Keysbrook Noise Logging Station Meteorological Data Methodology of Data Analysis Logged Data Analysis Compliance Assessment of Logged Data NOISE MODELLING NOISE MANAGEMENT DISCUSSION Noise Monitoring System Noise Management System CONCLUSION APPENDIX A MAPS OF THE KEYSBROOK MINE SITE... A-1 APPENDIX B DETAILS OF FURTHER INVESTIGATION... B-1 APPENDIX C SAMPLE OF DIRECTIONAL NOISE ALERT REPORT... C-1 APPENDIX D SOUND POWER LEVELS... D-2 Doc: Rev3-20.May.2016 Page IV

35 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q INTRODUCTION Keysbrook Leucoxene Pty Ltd (KLPL) operate their Keysbrook Mineral Sands Project under a Noise Management Plan 2 (NMP) to ensure that the mining operations and production activities comply with the provided license conditions 3,4. The licence conditions require quarterly reporting of noise monitoring including assessment of compliance with assigned levels. Keysbrook operations commenced on the 22 nd October The Keysbrook mine operates continuously, 24 hours per day, 7 days per week. The mine site is located approximately 70 km south of Perth. A BarnOwl noise logging station is located to the southwest of the mine site (across the road from a residence) for monitoring and management of mining noise emissions. Figure 6-2 in Appendix A indicates the location of Keysbrook logger station. The mine consists of several private freehold parcels of land (lots) which are predominantly pastoral. Mining within the Q period was undertaken in lot 6. Figure 6-1 in Appendix A presents an aerial view of the (proposed) mine site and surrounding area including the closest residences (lots). The first quarter of mining operations was from the 22 nd October 2015 to the 22 nd January 2016, and the compliance reporting for this period included assessment of the Barn Owl noise monitoring data, as well as some noise modelling (refer Environmental Noise Compliance Reporting Q1 2016, SVT Report Rev2-18.Feb.2016). This report covers the second quarter (Q2 2016) of mining operations, from the 23 rd January to the 22 nd April SVT was commissioned by KLPL to undertake a noise compliance assessment for this period of mining using the noise data logged at the Barn Owl noise monitoring station. This report presents the analysis and assessment results. 2 Keysbrook Mineral Sands Project Noise Management Plan, 20 October Ministerial Statement No. 810, 19 October 2009, Statement That a Proposal May Be Implemented Pursuant to the Provisions of the Environmental Protection Act Works Approval W5386/2013/1. Doc: Rev3-20.May.2016 Page 1

36 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q REGULATIONS AND LICENCE CONDITIONS 2.1 Assigned Levels Noise management in Western Australia is implemented through the Environmental Protection (Noise) Regulations 1997 (the Regulations) which operate under the Environmental Protection Act The Regulation specify maximum noise levels (assigned noise levels) which are the highest noise levels that can be received at noise-sensitive (residential), commercial and industrial premises. Table 2-1 presents the L A10 site specific assigned noise levels for the nearest noise sensitive premises (as presented in the Noise Management Plan). There are only two neighbouring residences that have an influencing factor that are applied to the assigned level. The L A10 assigned level is quoted in the table as this is considered to be the most stringent for KLPL operations. A map presenting all nearby noise sensitive receptors is presented in Figure 6-1 in Appendix A. Table 2-1: Assigned noise levels (LA10) in db(a) Noise Sensitive Receptor NSR 14 NSR 1 Address Lot 104 Westcott Rd, Keysbrook Lot 20 Hopelands Rd, North Dandalup Influencing Factor in db Assigned Noise levels (LA10) in db(a) Week day 5 Evening and Sunday 6 Night All other sensitive receptors The Regulations allow for an assessment period of between 15 minutes and 4 hours. For this assessment, the screening process to identify periods of potential exceedance is 15 minutes. However, when considering compliance a longer period, such as 3 4 hours, is more likely to be appropriate. The reason for this is that due to the transient nature of mining operations, levels can vary widely from hour to hour, and that a longer period will be more representative of the long term average. This is consistent with SVT s experience of how the Regulations has been applied on other facilities with similar, temporal noise characteristics. 2.2 Noise Monitor Placement Condition 14-4 of Ministerial Statement No. 810 requires that monitoring of noise levels at a location or locations representative of the noise sensitive premises closest to the active mining area for which the proponent does not have written agreement in place. 5 Week day: 0700 to 1900 hours Monday to Saturday. 6 Evening and Sunday: 1900 to 2200 hours all days, and 0900 to 1900 hours Sunday and public holidays. 7 Night: 2200 hours on any day to 0700 hours Monday to Sunday and 0900 hours Sunday and public holidays. Doc: Rev3-20.May.2016 Page 2

37 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q For the current mining area (Lot 6), NSR 1 is the closest residence without an agreement. Therefore, though KLPLs consultation and agreement with the resident regarding location of the noise monitor, the noise monitoring station has been located near the common boundary between the mine and Lot 20 Hopelands Rd (NSR1, see Figure 6-2 in Appendix A). The assigned noise levels for this residence form the basis of the assessment of compliance for the monitoring data. As the noise monitor is located approximately 150m nearer the mine than the residence there is a possibility that the noise levels received at the residence may vary slightly to the levels at the noise monitor. However, under most circumstances the noise levels from the mine at the monitor should be slightly higher, and therefore conservative when assessing compliance. 2.3 Corrections for Characteristic of Noise Measured noise levels at the receiver are required to be adjusted if the noise exhibits intrusive or dominant characteristics, i.e. if the noise is impulsive, tonal, or modulating. Table 2-2 presents the adjustments required for noise that exhibits intrusive or dominant characteristics. That is, if the noise is assessed as having tonal, modulating or impulsive characteristics, then the measured or predicted noise levels are adjusted, by the amounts given in Table 2-2. The adjusted noise levels must now comply with the assigned noise levels. Regulation 9 sets out objective tests to assess whether the noise is taken to be free of these characteristics. These adjustments are cumulative to a maximum of 15 db. Table 2-2: Adjustments for intrusive or dominant noise characteristics Situation Where tonality is present Where modulation is present Where impulsiveness is present Adjustment to Measured Level +5 db +5 db +10 db Doc: Rev3-20.May.2016 Page 3

38 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q LOGGING NOISE DATA ANALYSIS 3.1 Keysbrook Noise Logging Station The Keysbrook noise monitoring station utilises BarnOwl 8 a directional noise logger. The BarnOwl utilises a three microphone array that enables the system to approximately determine the direction of the sound source. Figure 6-2 in Appendix A indicates the location of the BarnOwl monitoring station, relative to the Wet Concentrator Plant (WCP) and the Mining Field Unit (MFU). Figure 3-1 presents a photo of the noise monitoring system. The Barn Owl directional system captures and logs the following: Total All Directionally Identified Sources Angle of Interest The total sound pressure level from a single microphone. The total noise level calculated by the directional system algorithm, from all directionally identified sources. It excludes sources with no measureable direction (see list below). The metric is an indicator of the dominance or otherwise of overall background noise. The noise level calculated by the directional system algorithm, including only noise from the direction of the minesite. When the Total level is much larger than the All Directionally Identified Sources level, this indicates that the dominant noise is: a) outside of the plane of direction finding (such as aircraft overhead); b) the noise is all encompassing or dispersed, such as wind generated foliage noise, insect/bird noise, or road traffic noise; c) outside of the frequency range of direction finding (very low or high frequency); or, d) within 3 m of the microphone array. In the circumstances for all encompassing noise, some proportion of this noise may be assigned to the Angle of Interest by the algorithm. During the Q period, the following settings were utilised on the Barn Owl: Logging period of 15 minutes; Triggering of an exceedance when the L AS10 level within the Angle of Interest exceeds 36 db(a); and, A 30 second sound recording is captured and stored at the start of the period when the system detects an exceedance of the trigger level. Limitations of the BarnOwl system include: The system does not record spectral data; The system does not meet the sound level meter requirements of the Environmental Protection (Noise) Regulations 1997; 8 Manufactured by SoundScience Pty Ltd Doc: Rev3-20.May.2016 Page 4

39 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q The system cannot be calibrated by a NATA certified laboratory (although it is field calibrated); The directional system cannot distinguish between direct noise sources, and noise reflections (not usually an issue when installed in an open free field environment); The directional system has a limited frequency range, although the range has been optimised for industrial noise; and, Like any sound level meter, the system cannot filter out wind or rain noise. Figure 3-1: The Barn Owl noise monitor 3.2 Meteorological Data KLPL provided the weather data used for this assessment, which was recorded from the Keysbrook weather station located close to the mine site. The weather data is logged and averaged over 15 minute periods, time stamped for the start of the logged period. 3.3 Methodology of Data Analysis Due to the large number of periods of interest identified by the noise logger a series of steps in the noise analysis are undertaken to eliminate as many false positives as possible, and to reduce the data assessed to those with potential to be caused by the mine site. The filtering steps taken are conservative to reduce the possibility of eliminating genuine exceedances. The remaining data is then investigated further using several methods, including listening to the recorded audio, to determine the cause of the noise and the contribution of the mine. Doc: Rev3-20.May.2016 Page 5

40 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Noise parameters of L AS10 and L Aeq were used in the analysis. Table 3-1 presents the analysis process as a flowchart. Detailed descriptions of steps [(A) through to (E)] are provided below. (A) Logged Data Exceeds Assigned Levels If the Total L AS10 level is below the assigned noise levels, compliance is achieved. If the L AS10 exceeds the assigned noise levels, further filters will apply. (B) Wind Speeds If wind speed exceeds 5m/s, recorded noise most likely dominated by the wind induced noise on the microphone, and the sample is therefore excluded from further analysis. (C) Noise Levels LAS10 From Angle of Interest If the L AS10 noise level from the direction of the mine site (Angle of Interest) exceeds the assigned level, the period will be considered for further investigation. If this condition does not occur, the data is not excluded yet as there is still the potential for a minesite related noise exceedance, where the noise characteristic is beyond the limits of the directional monitoring system. (D) Majority of Noise From Direction of Mine If the L Aeq noise level within the Angle of Interest is within 3 db of the level from All Directionally Identifiable Sources, this implies that the majority of the noise captured is from the direction of the mine site, and the period will be considered for further investigation. (E) Angle of Interest within 10 db of Assigned Level If the Angle of Interest L Aeq is greater than 10 db below the assigned level, the dominant noise is highly unlikely to be from the direction of the mine site, and therefore data samples meeting this criterion are excluded from the analysis. The 10 db difference has been chosen conservatively If this occurs, and the Total level is higher than the Assigned Level, the mine site s contribution to Total L Aeq levels would be less than 0.5 db, and would unlikely contribute to the Total L AS10 level. Further Investigation For the remaining samples (meeting either of the (D) or (E) criteria), the following data will be investigated to assess if the measured exceedance can be related to minesite noise: Alert generated audio recordings (if available); Alert generated directional reports (if available, see sample provided in Appendix C); Logged directional noise levels from the various available metrics, which can indicate the noise characteristic, and if it could be related to mine site activity; Weather data, to assess if prevailing wind conditions are favourable for noise propagation, or if the wind speed is high enough to generate noise in trees; and, Time of day, to determine if the noise measured could be related to bird or traffic activity. Doc: Rev3-20.May.2016 Page 6

41 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Table 3-1: Process of Filtering of Logged Data. 3.4 Logged Data Analysis Fifteen minute data samples provided by KLPL from the Keysbrook noise logging station, from 23 nd January 2016 to 22 nd April 2016, were assessed according to the methodology described in section 3.3. A summary of the assessment and data filtering steps is provided in Table 3-2. Table 3-2 : Data sample breakdown of filtering assessment Filter Step Total number of samples for time period from 23 nd January to 22 nd April 2016 Number of Samples Remaining After Filter Step 8736 (A) Total Noise Level Exceed Assigned Level 1913 (B) Wind speeds less than 5m/s 1859 Doc: Rev3-20.May.2016 Page 7

42 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Filter Step Number of Samples Remaining After Filter Step (C) Angle of Interest LAS10 Exceeds Assigned Level 38 (D) Majority of Noise From Direction of Mine 67 (E) Angle of Interest LAeq within 10 db of Assigned Level (Total data samples for further investigation) 38 The Barn Owl noise monitoring system recorded the data for 100% of the three month period (8736 (15 minute) data samples in total). Of these, a total of 38 samples were identified with potential for exceedance due to mining operations. Appendix B presents the results of further investigation of the filtered 38 data samples. The list of descriptors presented in Table 3-3 has been used on each sample where applicable. Table 3-3: Descriptors used in further investigation of filtered data samples Descriptor for Measurement Sample Noise Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest Wind noise feasible as wind speed > 4m/s No mining noise audible in recording Total LAeq significantly higher than Total LAS10 Within time period where birds and traffic are typically more active Isolated daytime exceedance Explanation This finding implies that the dominant noise source is not within the angle of interest, and may not be picked up by the directional system altogether. It is likely that the noise field is dominated by birds, insects, traffic, rustling trees or aeroplanes (noting the area is frequently used for pilot training). SVT has visited the site of the barn owl, and observed that noise generated by wind in foliage is significant in the area, even under very light wind speeds. Where an an alert generated audio recording was available, and on listening there was no mining related noise audible (see note within text below). This condition occurred several times in the dataset, and would likely be the result of a very short (<10% of the time) high noise event, such as thunder, or a bird chirping in close proximity to the monitor (or the electrical interference noise identified, see text below). This has been applied to sample where the time is between 5 am and 9 am. Within this time period, traffic flows typically increase (including on Hopelands Rd and the South-West Highway), and bird activity is also common. This is drawn from SVT s experience with noise monitoring at similar rural locations in the South-West, where often these non-mining related sources can dominate after 4:30 am. Several filtered exceedances occurred during the daytime period. These exceedences are considered isolated events, potentially due to personnel accessing the area near the noise monitoring system. Only 14 of the 38 samples identified for further analysis provided alert trigger data, these samples all occurred on the morning of the 14 th March and 18 th March. This indicates that may be an issue Doc: Rev3-20.May.2016 Page 8

43 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q with the alert triggering function within the noise monitor system, particularly as many other identified samples had Angle of Interest L AS10 levels exceeding the assigned levels. Furthermore, it was found that of the 14 audio samples assessed, almost all of the recordings contained a clicking noise. In SVT s experience this issue can be associated with a poor connection in the measurement chain from transducer to data logger, and could be caused by water ingress, corrosion, broken cable, loose fittings etc. Despite the interference noise, the background sound was still audible in these recordings, and no noise related to mining operations was identified. 3.5 Compliance Assessment of Logged Data The data on the morning 16th April (12:30 am to 2:15 am), indicates that the majority of the noise was from the direction of the angle of interest. The levels received in the 2:00 am sample were the closest to the Assigned Level, where the Angle of Interest L AS10 was 34.6 db(a). The Total L AS10 level in this period was 43.2 db(a), which shows that there is a large gap between the Angle of Interest and the Total level. The Barn Owl user manual indicates that in such circumstances the instrument may slightly under allocate directional data compared to the true level. This one period is the closest to an identified exceedance within the quarter, yet the Angle of Interest level from the monitor is still below the assigned level. In the first instance SVT has considered this period a medium probability of exceedance, as an exceedance may be possible given the limitations of the monitoring system. The results based on a 1 hr sample were also reviewed during this period, with Angle of Interest L AS10 levels ranging from 30.4 to 33.4 db(a) between 12 am and 3 am. The longer logging period provides greater data confidence, and considering this in terms of a longer 3-4 hour assessment period, the likelihood of exceedance would be further reduced. Based on the available data, and respecting the limitations of the monitoring system, there were no other periods within the quarter where the noise that could be attributed to mining activities approached the assigned level. Doc: Rev3-20.May.2016 Page 9

44 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q NOISE MODELLING Noise modelling was undertaken to represent the mining that took place at Keysbrook on the morning of the 16 th April. The modelling was completed conservatively using worst case night time meteorological conditions. The methodology used in the noise modelling, and equipment sound power levels, are similar to the methodology used previously (refer Environmental Noise Compliance Reporting Q1 2016, SVT Report Rev2-18.Feb.2016). However, since completion of this previous modelling, further verification measurements were undertaken around the site s Wet Concentrator Plant (WCP), and nearby pumps, which led to a reduction of the sound power level of these sources. The full list of sound power levels including corrected levels is presented in Appendix D. KLPL advised that mining operations on the morning of the 16 th April were in block 563 (located in Lot 6), using the following mobile equipment which were included in the noise model: 1 X PC450 Excavator 9 3 X Haul Trucks; 1 X Loader; and 1 X Watercart. The predicted noise level at Lot 20 Hopelands Rd is 32.2 db(a), which is almost 4 db below the Assigned Level. 9 Note that the PC450 excavator is the smaller of the two excavators KLPL operate. The larger PC1250 excavator was undergoing maintenance during this period. However, KLPL are now using the PC450 excavator during nights where the predicted weather conditions are expected to enhance noise propagation. Doc: Rev3-20.May.2016 Page 10

45 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q NOISE MANAGEMENT DISCUSSION 5.1 Noise Monitoring System There are several issues that have been identified with the current BarnOwl noise monitoring arrangement. In the Q Noise Compliance Reporting it was identified that the BarnOwl system does not currently capture spectral data, and hence tonal noise imissions, and tonality, cannot be assessed. KLPL and SVT have been involved in discussions with the supplier of the BarnOwl monitoring system, who are now working on implementing 1/3 octave data into the logging system. However, this is not expected to happen in the short term. As an interim measure, to assess the risk of tonality in the mine s noise emissions, SVT has suggested that KLPL undertake a short term noise monitoring or attended measurement exercise. This could involve capturing the mine s noise during the night time, at a location around the db(a) contour, and assessing the results for tonality (in accordance with the regulations). It seems from the noise monitoring data that the alerts system is not triggering as often as it should (see section 3.4). KLPL and SVT have discussed this issue, and after some trials KLPL has found that the alerts system is more reliable when set to alert on the total level, instead of the Angle of Interest. This change has already been implemented by KLPL. The following changes have also been made to the noise monitoring alerts settings: A period of one hour has been selected, and is used by the system to determine compliance; Alert triggers are set for exceeding Total L AS10 levels ; Trigger of an alert at 33 db(a); Alert triggers will generate a sound recording that captures and stores a 1 minute sample of the maximum noise level within the hour; and, A directional report will also be generated on an alert. The data shows periods where the L AS10 All Directionally Identifiable Sources exceeds the L AS10 for All Data, and also periods where the L AS10 of the Angle of Interest is higher than the L AS10 for All Directionally Identifiable Sources. While this is possible mathematically since each is a subset of the other, it indicates that the directional L AS10 data does not represent a data set for the full 15 minute period, and may in fact comprise of very few samples (the Barn Owl calculations directionality based on one second data). Assessing potential compliance with a degree of confidence on the basis of this data is difficult. Confidence would be improved if the number of samples in each L 10 calculation was presented in the raw output data. The L Aeq levels on directional data appear more robust (as the method for calculation of L Aeq inherently controls some of these issues), and are therefore has been used with greater confidence in SVT s data review process. Issues with the data and audio recordings were identified on the mornings of the 14th March and 18th March. The issues found are consistent with SVT s experience with a poor connection in the measurement chain from transducer to data logger. The Barn Owl user s manual recommends numerous maintenance steps to be undertaken on a monthly basis. These include (amongst others) inspection of the microphones and connections for damage, and field calibration of each microphone. KLPL should ensure these activities are undertaken regularly. Doc: Rev3-20.May.2016 Page 11

46 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Noise Management System KLPL recently implemented MaestroMine, a noise management planning tool that enables them to plan mine activities to avoid situations that under predicted weather conditions will lead to a noncompliance with licence conditions. While no MaestoMine data was available for review within the Q period, SVT understands that KLPL are now using MaestroMine as part of their daily planning exercises. Furthermore, due to the current tonality unknowns, KLPL have incorporated a 5 db buffer in their MaestroMine planning, which should lead to conservative planning and noise management. KLPL are currently procuring a noise barrier to install around their southern bore pump. This is expected to be completed within the next one to two months. In accordance with the regulations, assessment of noise should be undertaken over a period of 15 minutes to 4 hours. Doc: Rev3-20.May.2016 Page 12

47 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q CONCLUSION SVT have assessed noise monitoring data for the second quarter of mining operations at Keysbrook (from 23 rd January 2016 to 22 nd April 2016). The Barn Owl noise monitoring system recorded the data for 100% of this three month period. A filtering process was applied to the total data set to identify 38 periods where there is a higher probability of mine site noise causing an exceedance of the assigned levels. These 38 periods were investigated in further detail, with the following findings: Issues with the data and audio recordings were identified on the mornings of the 14 th March and 18 th March, although the available data indicates that the exceedances are not related to mine site noise; and, The data on the morning 16th April (12:30 am to 2:15 am), indicates that the majority of the noise was from the direction of the mine site, although there was also a large amount of noise from sources where a direction was not determined. Angle of Interest 1 hour L AS10 levels were has high as 33.4 db(a) during this period (the Assigned Level at the receptor is 36 db(a) L AS10 ). Based on this SVT initially considered this period a medium probability of exceedance, as an exceedance may be possible given the limitations of the monitoring system. No other periods of potential exceedance were identified from the data available. Noise modelling was undertaken to represent the mining that took place at Keysbrook on the morning of the 16th April. The modelling was completed conservatively using worst case night time meteorological conditions. The model predicted the noise to be almost 4 db below the Assigned Level at Lot 20 Hopelands Rd. The predicted levels were consistent (within 1.5 db) with the angle of interest measurements for the same period. The detailed modelling has added confidence to the finding that while noise levels from the mine approached the Assigned Levels on the morning of the 16 April, it is likely that they did not exceed the Assigned Levels. Based on the available data, and respecting the limitations of the monitoring system, there were no periods of assigned level exceedance within the quarter that could be attributed to mining noise. Recommendations As outlined in section 4, KLPL have already taken numerous steps to improve the noise monitoring system outputs, and reduce their noise emissions to the community. Most of these steps have been recently implemented, and therefore improvements should be effective for the next quarter s noise compliance assessment. However, SVT have the following further recommendations: In the absence of 1/3 octave data available from the Barn Owl noise monitoring system, to assess the risk of tonality in the mine s noise emissions, SVT recommends that KLPL undertake a short term noise monitoring or attended measurement exercise. This would involve capturing the mine s noise during the night time, at a location around the db(a) contour, and assessing the results for tonality (in accordance with the regulations). Obtain clarification from the Barn Owl supplier on the calculation method used to calculate the L AS10 on directional data (All Directionally Identifiable Sources and Angle of Interest). Understanding the method would give us greater confidence in these results. Additionally request if the number of samples in each L 10 calculation could be presented in the raw output data. Doc: Rev3-20.May.2016 Page 13

48 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q KLPL should undertake the maintenance steps outlined in the Barn Owl user s manual on a regular basis to ensure the system maintains performance and calibration. Doc: Rev3-20.May.2016 Page 14

49 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX A MAPS OF THE KEYSBROOK MINE SITE Figure 6-1: Aerial view of the Keysbrook mine site. Doc: Rev3-20.May.2016 A-1

50 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Figure 6-2: Location of Keysbrook Logging Station. Doc: Rev3-20.May.2016 A-2

51 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX B DETAILS OF FURTHER INVESTIGATION Date and Time (start of 15 min period) Total Level [db(a)] Level of All Directionally Identified Sources [db(a)] Angle of Interest Level [db(a)] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Direction Day Period Assigned Level LA10 [db(a)] (A) Exceedance of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available SVT Comment Likelihood of Exceedance 23/01 5:15 AM SE Saturday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE 28/01 1:45 AM SE Thursday Night 36 TRUE TRUE TRUE FALSE TRUE FALSE 28/01 5:15 AM E Thursday Night 36 TRUE TRUE TRUE FALSE TRUE FALSE 28/01 11:30 PM E Thursday Night 36 TRUE TRUE TRUE FALSE TRUE FALSE 29/01 12:15 AM E Friday Night 36 TRUE TRUE TRUE FALSE TRUE FALSE 30/01 12:15 AM E Saturday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE 20/02 1:00 AM E Saturday Night 36 TRUE TRUE TRUE FALSE TRUE FALSE 5/03 7:15 AM SE Saturday Day 46 TRUE TRUE FALSE TRUE TRUE FALSE 13/03 7:15 AM E Sunday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE 13/03 8:15 AM NE Sunday Night 36 TRUE TRUE TRUE TRUE TRUE FALSE 14/03 2:00 AM E Monday Night 36 TRUE TRUE TRUE TRUE TRUE TRUE Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active Total levels >10dB higher than Angle of Interest Wind noise feasible as wind speed > 4m/s Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Wind noise feasible as wind speed > 4m/s Total levels >10dB higher than Angle of Interest Wind noise feasible as wind speed > 4m/s Total levels >10dB higher than Angle of Interest Wind noise feasible as wind speed > 4m/s Angle of Interest LAS10 higher than All Sources Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active Total LAeq significantly higher than LAS10 Angle of Interest LAS10 higher than All Sources Isolated daytime exceedance Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total levels >10dB higher than Angle of Interest 14/03 2:30 AM E Monday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE Total levels >10dB higher than Angle of Interest 14/03 3:00 AM NE Monday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE Total levels >10dB higher than Angle of Interest 14/03 3:15 AM E Monday Night 36 TRUE TRUE TRUE TRUE TRUE TRUE No mining noise audible in recording Total levels >10dB higher than Angle of Interest Angle of Interest LAS10 higher than All Sources 14/03 3:30 AM NE Monday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE Total levels >10dB higher than Angle of Interest 14/03 4:00 AM NE Monday Night 36 TRUE TRUE TRUE TRUE TRUE TRUE 14/03 4:15 AM NE Monday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE No mining noise audible in recording Total levels >10dB higher than Angle of Interest No mining noise audible in recording Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest 14/03 4:45 AM NE Monday Night 36 TRUE TRUE TRUE FALSE TRUE FALSE Total levels >10dB higher than Angle of Interest 14/03 5:00 AM NE Monday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE 14/03 5:15 AM NE Monday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE 14/03 5:30 AM NE Monday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE 14/03 5:45 AM NE Monday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE No mining noise audible in recording Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active Doc: Rev3-20.May.2016 B-1

52 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date and Time (start of 15 min period) Total Level [db(a)] Level of All Directionally Identified Sources [db(a)] Angle of Interest Level [db(a)] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Direction Day Period Assigned Level LA10 [db(a)] (A) Exceedance of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available SVT Comment Likelihood of Exceedance 14/03 6:30 AM N Monday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE 14/03 8:15 AM NE Monday Day 46 TRUE TRUE TRUE TRUE TRUE FALSE 15/03 6:30 AM NW Tuesday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE 17/03 6:30 AM SE Thursday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE 18/03 5:15 AM E Friday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE 18/03 5:30 AM E Friday Night 36 TRUE TRUE TRUE FALSE TRUE FALSE 18/03 5:45 AM E Friday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE 18/03 6:00 AM E Friday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE 18/03 6:15 AM E Friday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE 18/03 6:30 AM E Friday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE 18/03 6:45 AM E Friday Night 36 TRUE TRUE TRUE FALSE TRUE TRUE Total LAeq significantly higher than LAS10Total levels >10dB higher than Angle of InterestWithin time period where birds and traffic are typically more active Angle of Interest LAS10 higher than All Sources Total levels >8dB higher than Angle of Interest Isolated daytime exceedance Total levels >8dB higher than Angle of Interest Within time period where birds and traffic are typically more active Total LAeq significantly higher than LAS10 Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active Total LAeq significantly higher than LAS10 No mining noise audible in recording Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Within time period where birds and traffic are typically more active Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total LAeq significantly higher than LAS10 Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total levels >10dB higher than Angle of Interest Within time period where birds and traffic are typically more active No mining noise audible in recording Total levels >10 db higher than Angle of Interest All Sources levels >5 db higher than Angle of Interest Within time period where birds and traffic are typically more active 16/04 12:30 AM E Saturday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE Total levels >10dB higher than Angle of Interest 16/04 1:30 AM E Saturday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE Total levels >10dB higher than Angle of Interest 16/04 1:45 AM E Saturday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE Total levels >10dB higher than Angle of Interest 16/04 2:00 AM E Saturday Night 36 TRUE TRUE FALSE TRUE TRUE FALSE Total levels >10dB higher than Angle of Interest Medium 22/04 10:45 AM NE Friday Day 46 TRUE TRUE FALSE TRUE TRUE FALSE Total levels >5dB higher than Angle of Interest Isolated daytime exceedance Doc: Rev3-20.May.2016 B-2

53 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX C REPORT SAMPLE OF DIRECTIONAL NOISE ALERT Figure 6-3: Example of a Barn Owl directional report. Doc: Rev3-20.May.2016 C-1

54 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX D SOUND POWER LEVELS Modelled sound power levels for fixed plant and mobile equipment. Equipment Octave Band Sound Power Levels in db(l) k 2k 4k 8k Fixed Plant O/A db(a) Wet Plant MFU MFU Booster Pump Discharge Point Process Water Pumps Production Bore Pump Production Bore Pump Raw Water Pump Slimes Discharge Point Slimes Return Pump Tails 1 Booster Pump Tails 2 Booster Pump Tails Return Pump Tails Return Pump Mobile Equipment Watercart AWC Excavator PC1250SP Excavator PC Haul Truck Haul Truck Haul Truck Loader LDW Doc: Rev3-20.May.2016 D-2

55 KEYSBROOK ENVIRONMENTAL NOISE COMPLIANCE REPORTING Q KEYSBROOK LEUCOXENE PTY LTD Rev3-19.Aug Perth ǀ Brisbane ǀ Melbourne Noise ǀ Vibration ǀ Corrosion ǀ Pressure Safety ǀ Reliability ǀ Integrity ǀ Training Asset Support ǀ Design Support ǀ Troubleshooting

56 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q DOCUMENT CONTROL & REVIEW INFORMATION Client: Client Contact: Keysbrook Leucoxene Pty Ltd Marc Morris SVT Contact: SVT Office: Peter Glorie Perth SVT Job No: SVT Document No: Rev3-19.Aug.2016 Rev Description Prepared Reviewed Date 1 Issued for Client Review Peter Glorie Greg Stewart 15 Aug Client comments considered and clarifications added Peter Glorie Greg Stewart 18 Aug KLPL operation shift notes added Peter Glorie Greg Stewart 19 Aug 2016 SVT Engineering Consultants ABN: SVT Brisbane Office SVT Perth (HEAD OFFICE) SVT Melbourne Office Level 10, 320 Adelaide St Brisbane, Queensland 4000 Australia Tel: +61 (0) Fax: +61 (0) mailbox@svt.com.au 112 Cambridge St West Leederville WA 6007 Australia Tel: + 61 (0) Fax: + 61 (0) mailbox@svt.com.au SVT Engineering Consultants Wood Group Kenny Level 3, 171 Collins St, Melbourne VIC 3000 Australia Tel: Fax: mailbox@svt.com.au The content of this document was prepared by SVT Engineering Consultants (SVT) on behalf of our client in accordance with a defined scope of work (including the limitations of the study and the conditions and terms of the contract) to meet a specific need. SVT has executed the work with all reasonable care and diligence consistent with the specific purpose of the study using data provided by the client and /or collected by SVT. No representation, implicitly or otherwise, is made that the information presented in this report is suitable for any purpose other for which it was specifically prepared. Any third party relying on the content presented herein does so at their own risk, no responsibility of any nature is accepted by SVT or SVT s parent company. Doc: Rev3-19.Aug.2016 Page I

57 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q EXECUTIVE SUMMARY Keysbrook Leucoxene Pty Ltd (KLPL) operate the Keysbrook Mineral Sands Project, located ~70 km south of Perth. To ensure that the mining operations and production activities comply with the provided license conditions, noise monitoring is undertaken consistent with the 2011 Noise Monitoring Plan. The licence conditions require quarterly reporting of noise monitoring including assessment of compliance with assigned levels. This report covers the third quarter (Q3 2016) of mining operations, from the 23 rd April 2016 to 22 nd July 2016 (see table below for a list of past reports). A BarnOwl noise logging station is located to the southwest of the mine site (across the road from the residence at Lot 20, Hopelands Rd) for monitoring and management of mining noise emissions. The noise monitoring system recorded data for 98.5% of the current monitoring quarter. A filtering process was applied to the total data set (15 minute sample resolution) to identify samples where there is the potential of mine site noise causing an exceedance of the assigned levels. Assessment of Compliance Of the 96 filtered samples, 83 are within the 5:30 am to 9:00 am timeframe. SVT has assessed 79 of these as having a low likelihood of minesite related noise exceedance. This is based on several aspects of data review and analysis, SVT are reasonably confident that the majority of noise within this time frame (and monitoring samples assessed) is not due to mining operations, but rather from daily traffic patterns, birds, and other animals. Four filtered samples within the 5:30 am to 9:00 am time frame were initially assessed as a medium likelihood of exceedance for these samples a minesite related exceedance may have been possible given the limitations of the monitoring system, and the shortage of data available to prove otherwise. However, based on shift notes provided by KLPL, there were no unusual mining activities underway at these times, and SVT assessed the residual likelihood of exceedance as low. Two filtered samples occur at night time (before 5:30 am), where the data indicates unusually high levels of non-mining operations related noise, unlikely to be associated with the mine site. SVT considers these samples as a low likelihood of minesite related noise exceedance. The remaining eleven filtered samples are: during daytime hours; are temporary and isolated; and, much higher than typical minesite operations noise. Where the data indicates filtered samples exhibit unusually high levels of noise, it is considered unlikely to be associated with the mine site. SVT has assessed these samples as a having low likelihood of minesite related noise exceedance. The BarnOwl noise monitoring system is (currently) not able to log 1/3 octave data, and therefore it is not possible to determine if a tonality adjustment should apply to the data. It is feasible that minesite noise at the logger could be tonal, and that if an adjustment was to be applied to the received noise level, exceedances could occur. However, based on the limited data available, SVT expects that tonality adjustments would not apply most of the time, and if they did the adjusted level would often not exceed the assigned levels. To assess this further, additional information is required. Doc: Rev3-19.Aug.2016 Page II

58 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Based on the available data, and respecting the limitations of the monitoring system, there were no assigned level exceedances within the quarter that could, with a high degree of confidence, be attributed to mining noise. Comments on Noise Management In response to past noise monitoring reports, the Office of the Environmental Protection Authority (OEPA) recommends that tonality is incorporated into future monitoring. KLPL have now commissioned the implementation of this data into the BarnOwl system, and this is currently expected to be complete in late September. Within this quarter s monitoring period, KLPL have procured and installed a noise barrier around their southern bore pump, and noise measurements taken by SVT indicate the barrier is providing a 6 db reduction in noise at 100m from the pump in the direction of the receiver. Most of the filtered samples investigated had MaestroMine predicted levels, indicating that KLPL are now routinely using the MaestroMine noise management system, to help plan their activities to avoid causing an exceedance of the assigned noise levels. Furthermore, SVT has been in regular communication with KLPL throughout this quarterly period assisting with noise management queries. SVT are confident that KLPL are managing their noise to a reasonably effective standard. Doc: Rev3-19.Aug.2016 Page III

59 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q TABLE OF CONTENTS DOCUMENT CONTROL & REVIEW INFORMATION... I EXECUTIVE SUMMARY... II TABLE OF CONTENTS... IV 1. INTRODUCTION REGULATIONS AND LICENCE CONDITIONS Assigned Levels Noise Monitor Placement Corrections for Characteristic of Noise LOGGING NOISE DATA ANALYSIS Keysbrook Noise Logging Station Meteorological Data Data Filtering Methodology Further Investigation and Assessment Methodology Logged Data Filtering Logged Data Further Investigation Compliance Assessment of Logged Data Morning Period (between 5:30 am and 9:00 am) Tonality NOISE MANAGEMENT DISCUSSION Noise Monitoring System Noise Management System General Noise Control and Management CONCLUSION APPENDIX A MAPS OF THE KEYSBROOK MINE SITE... A-1 APPENDIX B DETAILS OF FURTHER INVESTIGATION... B-1 APPENDIX C SAMPLE OF DIRECTIONAL NOISE ALERT REPORT... C-1 APPENDIX D INFLUENCING FACTOR CALCULATIONS... D-2 Appendix D-1 Environmental Protection (Noise) Regulations Assigned Noise Levels... D-2 Appendix D-2 NSR 1 Influencing Factor Calculation... D-3 Doc: Rev3-19.Aug.2016 Page IV

60 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q INTRODUCTION Keysbrook Leucoxene Pty Ltd (KLPL) operate the Keysbrook Mineral Sands Project, located ~70 km south of Perth. To ensure that the mining operations and production activities comply with the provided license conditions 1,2, noise monitoring is undertaken consistent with the 2011 Noise Monitoring Plan 3. The licence conditions require quarterly reporting of noise monitoring including assessment of compliance with assigned levels. Keysbrook operations commenced on the 22 nd October The Keysbrook mine operates continuously, 24 hours per day, 7 days per week. The mine site is located approximately 70 km south of Perth. A BarnOwl noise logging station is located to the southwest of the mine site (across the road from a residence) for monitoring and management of mining noise emissions. Figure 5-2 in Appendix A indicates the location of Keysbrook logger station. SVT have been commissioned by KLPL to undertake quarterly noise compliance assessments based on the noise data logged at the BarnOw l noise monitoring station. A summary of the reports presenting the analysis and assessment results prepared thus far are listed in Table 1-1. This report covers the third quarter (Q3 2016) of mining operations, from the 23 rd April 2016 to 22 nd July Table 1-1: Summary of quarterly noise monitoring compliance reports Operations Period Date Range Compliance Report Reference Q nd October 2015 to the 22 nd January 2016 SVT Report Rev2-18.Feb.2016 Q rd January 2016 to 22 nd April 2016 SVT Report Rev4-3.Jun.2016 Q rd April 2016 to 22 nd July 2016 This report The mine consists of several private freehold parcels of land (lots) which are predominantly pastoral. Mining within the Q period was primarily undertaken in lot 6. Figure 5-1 in Appendix A presents an aerial view of the (proposed) mine site and surrounding area including the closest residences (lots). 1 Ministerial Statement No. 810, 19 October 2009, Statement That a Proposal May Be Implemented Pursuant to the Provisions of the Environmental Protection Act Works Approval W5386/2013/1. 3 Noise Monitoring Plan, August 2011, b, Lloyd George Acoustics Doc: Rev3-19.Aug.2016 Page 1

61 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q REGULATIONS AND LICENCE CONDITIONS 2.1 Assigned Levels Noise management in Western Australia is implemented through the Environmental Protection (Noise) Regulations 1997 (the Regulations) which operate under the Environmental Protection Act The Regulation specify maximum noise levels (assigned noise levels) which are the highest noise levels that can be received at noise-sensitive (residential), commercial and industrial premises. Appendix D provides further detail on the regulatory Assigned Levels, as well as details for the calculation of the influencing factor of NSR 1 (as this receptor is the focus of the compliance assessment). Table 2-1 presents the L A10 site specific assigned noise levels for the nearest noise sensitive premises. There are only two neighbouring residences that have an influencing factor that are applied to the assigned level. The L A10 assigned level is quoted in the table as this is considered to be the most stringent for KLPL operations. A map presenting all nearby noise sensitive receptors is presented in Figure 5-1 in Appendix A. Table 2-1: Assigned noise levels (LA10) in db(a) Noise Sensitive Receptor NSR 14 NSR 1 Address Lot 104 Westcott Rd, Keysbrook Lot 20 Hopelands Rd, North Dandalup Influencing Factor in db Assigned Noise levels (LA10) in db(a) Week day 4 Evening and Sunday 5 Night All other sensitive receptors The Regulations allow for an assessment period of between 15 minutes and 4 hours. For this assessment, the screening process to identify samples of potential mine site related exceedance is 15 minutes. However, when considering compliance a longer period such as 3 4 hours, is more likely to be appropriate. The reason for this is that due to the transient nature of mining operations, levels can vary widely from hour to hour, and that a longer period will be more representative of the long term average. This is consistent with SVT s experience of how the Regulations have been applied on other facilities with similar, temporal, noise characteristics. 4 Week day: 0700 to 1900 hours Monday to Saturday. 5 Evening and Sunday: 1900 to 2200 hours all days, and 0900 to 1900 hours Sunday and public holidays. 6 Night: 2200 hours on any day to 0700 hours Monday to Sunday and 0900 hours Sunday and public holidays. Doc: Rev3-19.Aug.2016 Page 2

62 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Noise Monitor Placement Condition 14-4 of Ministerial Statement No. 810 requires that monitoring of noise levels at a location or locations representative of the noise sensitive premises closest to the active mining area for which the proponent does not have written agreement in place. For the current mining area (Lot 6), NSR 1 is the closest residence without an agreement. Therefore, through KLPLs consultation and agreement with the resident regarding location of the noise monitor, the noise monitoring station has been located near the common boundary between the mine and Lot 20 Hopelands Rd (NSR1, see Figure 5-2 in Appendix A). The assigned noise levels for this residence form the basis of the assessment of compliance for the monitoring data. As the noise monitor is located approximately 150 m nearer the mine than the residence there is a possibility that the noise levels received at the residence may vary slightly to the levels at the noise monitor. However, under most circumstances the noise levels from the mine at the monitor should be slightly higher, and therefore conservative when assessing compliance. 2.3 Corrections for Characteristic of Noise Measured noise levels at the receiver are required to be adjusted if the noise exhibits intrusive or dominant characteristics, i.e. if the noise is impulsive, tonal, or modulating. Table 2-2 presents the adjustments required for noise that exhibits intrusive or dominant characteristics. That is, if the noise is assessed as having tonal, modulating or impulsive characteristics, then the measured or predicted noise levels are adjusted, by the amounts given in Table 2-2. The adjusted noise levels must now comply with the assigned noise levels. Regulation 9 sets out objective tests to assess whether the noise is taken to be free of these characteristics. These adjustments are cumulative to a maximum of 15 db. Table 2-2: Adjustments for intrusive or dominant noise characteristics Situation Where tonality is present Where modulation is present Where impulsiveness is present Adjustment to Measured Level +5 db +5 db +10 db Doc: Rev3-19.Aug.2016 Page 3

63 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q LOGGING NOISE DATA ANALYSIS 3.1 Keysbrook Noise Logging Station The Keysbrook noise monitoring station utilises a BarnOwl 7 directional noise logger. The BarnOwl utilises a three microphone array that enables the system to approximately determine the direction of the sound source. Figure 5-2 in Appendix A indicates the location of the BarnOwl monitoring station, relative to the Wet Concentrator Plant (WCP) and the Mining Field Unit (MFU). Figure 3-1 presents a photo of the noise monitoring system. The BarnOwl directional system captures and logs the following: Total All Directionally Identified Sources Angle of Interest The total sound pressure level from a single microphone. The total noise level calculated by the directional system algorithm, from all directionally identified sources. It excludes sources with no measureable direction (see list below). The metric is an indicator of the dominance or otherwise of overall background noise. The noise level calculated by the directional system algorithm, including only noise from the direction of the minesite. When the Total level is much larger than the All Directionally Identified Sources level, this indicates that the dominant noise is: a) outside of the plane of direction finding (such as aircraft overhead); b) the noise is all encompassing or dispersed, such as wind generated foliage noise, insect/bird noise, or road traffic noise; c) outside of the frequency range of direction finding (very low or high frequency); or, d) within 3 m of the microphone array. In the circumstances for all encompassing noise, some proportion of this noise may be assigned to the Angle of Interest by the algorithm. During the Q period, the following settings were utilised on the BarnOwl: Logging period of 15 minutes, each 15 minutes is stored as one logged sample; Triggering of an exceedance when the L AS10 Total Noise level when exceeds 36 db(a); and, A 60 second sound recording is captured and stored of the noisiest part of the period where the system detects an exceedance of the trigger level. Limitations of the BarnOwl system include: The system does not record spectral data; The system does not meet the sound level meter requirements of the Environmental Protection (Noise) Regulations 1997; 7 Manufactured by SoundScience Pty Ltd Doc: Rev3-19.Aug.2016 Page 4

64 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q The system cannot be calibrated by a NATA certified laboratory (although it is field calibrated); The directional system cannot distinguish between direct noise sources, and noise reflections (not usually an issue when installed in an open free field environment); The directional system has a limited frequency range, although the range has been optimised for industrial noise; and, Like any sound level meter, the system cannot filter out wind or rain noise. Figure 3-1: The BarnOwl noise monitor 3.2 Meteorological Data KLPL provided the weather data used for this assessment, which was recorded from the Keysbrook weather station located close to the mine site. The weather data is logged and averaged over 15 minute samples, time stamped for the start of the logged period. 3.3 Data Filtering Methodology Due to the large number of samples of interest identified by the noise logger a series of steps in the noise analysis are undertaken to eliminate as many false positives as possible, and to reduce the data assessed to those with potential to be caused by the mine site. The filtering steps taken are conservative to reduce the possibility of eliminating genuine exceedances. The remaining data is then investigated further using several methods, including listening to the recorded audio, to determine the cause of the noise and the contribution of the mine. Noise parameters of L AS10 and L Aeq were used in the analysis. Figure 3-2 presents the filtering process as a flowchart. Detailed descriptions of steps [(A) through to (E)] are provided below. Doc: Rev3-19.Aug.2016 Page 5

65 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Figure 3-2: Process of Filtering of Logged Data (A) Logged Data Exceeds Assigned Levels If the Total L AS10 level is below the assigned noise levels, compliance is achieved. If the L AS10 exceeds the assigned noise levels, further filters will apply. (B) Wind Speeds If wind speed exceeds 5m/s, recorded noise most likely dominated by the wind induced noise on the microphone, and the sample is therefore excluded from further analysis. (C) Noise Levels LAS10 From Angle of Interest If the L AS10 noise level from the direction of the mine site (Angle of Interest) exceeds the assigned level, the sample will be considered for further investigation. If this condition does not occur, the data is not excluded yet as there is still the potential for a minesite related noise exceedance, where the noise characteristic is beyond the limits of the directional monitoring system. Doc: Rev3-19.Aug.2016 Page 6

66 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q (D) Majority of Noise From Direction of Mine If the L Aeq noise level within the Angle of Interest is within 3 db of the level from All Directionally Identifiable Sources, this implies that the majority of the noise captured is from the direction of the mine site, and the sample will be considered for further investigation. (E) Angle of Interest within 10 db of Assigned Level If the Angle of Interest L Aeq is greater than 10 db below the assigned level, the dominant noise is highly unlikely to be from the direction of the mine site, and therefore data samples meeting this criterion are excluded from the analysis. The 10 db difference has been chosen conservatively If this occurs, and the Total level is higher than the Assigned Level, the mine site s contribution to Total L Aeq levels would be less than 0.5 db, and would unlikely contribute to the Total L AS10 level. 3.4 Further Investigation and Assessment Methodology For the remaining samples (meeting either of the (D) or (E) filter criteria), the following data will be investigated to assess if the filtered sample can be related to minesite noise: Logged directional noise levels from the various available metrics, which can indicate the noise characteristic, and if it could be related to mine site activity; Weather data, to assess if prevailing wind conditions are favourable for noise propagation, or if the wind speed is high enough to generate noise in trees; and, Alert generated audio recordings (if available); Alert generated directional reports (if available, see sample provided in Appendix C); Time of day, to determine if the noise could be related to bird or traffic activity patterns; Noise level trend (i.e. review of the levels before and after the sample); and, Logged mine activities (if available). For the purposes of consistency, a list of descriptors has been compiled to summarise specific aspects of the investigation. Table 3-1 defines the various descriptors applied to each filtered sample where applicable. Table 3-1: Descriptors used in further investigation of filtered data samples Descriptor for Measurement Sample Noise Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest Wind generated foliage noise feasible as wind speed > 4m/s Explanation This finding implies that the dominant noise source is not within the angle of interest, or may not be picked up by the directional system altogether. It is likely that the noise field is dominated by birds, insects, traffic, rustling trees or aeroplanes (noting the area is frequently used for pilot training). SVT has visited the site of the BarnOwl, and observed that noise generated by wind in foliage is significant in the area, even under very light wind speeds. Doc: Rev3-19.Aug.2016 Page 7

67 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Descriptor for Measurement Sample Noise Total LAeq significantly higher than Total LAS10 Within time frame where birds and traffic is typically more active Isolated daytime exceedance The Angle of Interest LAS10 is significantly lower than the assigned level. MaestroMine predicted levels are at least 5 db below the assigned level. Explanation This condition occurred several times in the dataset, and would likely be the result of a very short (<10% of the time) high noise event, such as thunder, or a bird chirping in close proximity to the monitor. It is not typical of mine generated noise. This has been applied to samples where the time is between 5:30 am and 9:00 am. Within this time frame, traffic flows typically increase (including on Hopelands Rd and the mine access road), and bird activity is also common. Further discussion of this is made in Several filtered exceedances occurred during the daytime period. These exceedances are considered isolated events, potentially due to passing traffic, aeroplanes, or personnel accessing the area near the noise monitoring system. Several filtered samples had this condition, and where true an exceedance is unlikely. The predicted levels from the MaestroMine noise management system are well below the assigned levels, indicating that MZI are managing their mine site noise emissions adequately (see section 4.2 for more discussion). The assessment of compliance is based on the likelihood of mine site operations noise exceeding the assigned levels over a long assessment period (3 4 hours). The reason for the long assessment period is explained in section 2.1. Table 3-2 summarises the assessment classifications applied to each filtered sample, based on the outcomes of further investigation. Table 3-2: Assessment classification definitions Assessment Classification Likelihood Medium Likelihood High Likelihood Verified Exceedance Definition Where the data indicates that the majority of the noise is from extraneous noise (not related to mine site operations, e.g. birds, traffic, planes, community, etc.); and/or, Where the filtered sample is unlikely to cause an exceedance over a long assessment period. Where the data is not clear whether the noise is from mining operations or from extraneous noise; and, Where the filtered sample may cause an exceedance over a long assessment period. Where the data indicates that the majority of noise is from mining operations, although some contributions from extraneous noise still exists; and, Where the filtered sample may cause an exceedance over a long assessment period. Where the data indicates that the majority of noise is from mining operations; and, Where an exceedance over a long assessment period is certain. Doc: Rev3-19.Aug.2016 Page 8

68 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Logged Data Filtering Fifteen minute data samples provided by KLPL from the Keysbrook noise logging station, from 23 nd April 2016 to 22 nd July 2016, were assessed according to the methodology described in section 3.3. A summary of the assessment and data filtering steps is provided in Table 3-3. Table 3-3: Data sample breakdown of filtering assessment Filter Step Total number of samples for quarterly period from 23 nd April to 22 nd July 2016 Number of Samples Remaining After Filter Step 8736 (A) Total LAS10 Noise Level Exceed Assigned Level 1338 (B) Wind speeds less than 5m/s 1163 (C) Angle of Interest LAS10 Exceeds Assigned Level 8 (D) Majority of Noise From Direction of Mine 1122 (E) Angle of Interest LAeq within 10 db of Assigned Level (Total data samples for further investigation) 96 Note: For Q there appears to be an error with the export of the All Sources L Aeq Level, where BarnOwl is exporting levels lower than expected. This has resulted in almost the entire data set meeting step (D) criteria, and a larger than expected number of samples considered for further investigation. More realistic All Sources L Aeq levels are reported in the directional charts; hence the error appears to be within the data export function of the system, and not within the noise monitor algorithm. The BarnOwl noise monitoring system recorded the data for 98.5% 8 of the three month period ( minute data samples in total). Of these, a total of 96 filtered samples were identified with potential for exceedance due to mining operations, and were investigated in more detail. 3.6 Logged Data Further Investigation Appendix B presents the results of further investigation of the filtered 96 data samples. The methodology set out in section 3.4 has been applied. 20 of the 96 samples identified for further analysis provided alert trigger data (audio and directional reports). SVT notes that midway through the monitoring quarter, the alert triggering period was changed from 1 per hour to 1 per minute. KLPL have advised that this was done to capture more audio recordings to assist in the identification of noise contributing sources. 8 The BarnOwl system did not provide any data following 3:30 am on the 21 st July the last two days of the monitoring period. Doc: Rev3-19.Aug.2016 Page 9

69 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Compliance Assessment of Logged Data Appendix B presents the compliance assessment for each of the filtered 96 data samples. Each filtered sample has been considered separately, based on the data available, in assessing the likelihood of exceedance. Within the 5:30 am to 9:00 am timeframe, SVT has assessed 79 filtered samples as a low likelihood of minesite related noise exceedance, based on not only the time of the exceedance but also considering the other factors such as available audio, and logged noise metrics. SVT are reasonably confident that the majority of noise within this time frame is not due to mining operations, but rather from daily traffic patterns, birds, and other animals (see further discussion and analysis in section 3.7.1). Four filtered samples (summarised in Table 3-4) within the 5:30 am to 9:00 am time frame were initially assessed as a medium likelihood of exceedance for these samples a minesite related exceedance may have been possible given the limitations of the monitoring system, and the shortage of data available to prove otherwise. No audio data or directional reports were available for any of these sample times. KLPL have been able to provide shift notes for the periods identified. For the first three samples listed in the table, the notes indicate that there was no unusual mining activity at these times, and/or there was inclement weather experienced. The fourth sample (19 th July) in this table occurred during a period where mining operations were shut down for planned maintenance (see Figure 3-5 for a plot of the noise levels on this morning). Based on this information, SVT have reduced the likelihood of exceedance to low. Table 3-4: Samples assessed as a medium likelihood of minesite related exceedance Date and Time Total Level [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 SVT Analysis Comments KLPL Provided Operations Information Residual Likelihood of Exceedance 12/05 6:15 AM 17/05 5:45 AM Within time period where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time period where birds and traffic are typically more active. No noted extra mining activities detected at this time. Inclement weather experienced at this time (slower than normal feed rate). No noted extra mining activities detected at this time. 18/05 5:45 AM Within time period where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Inclement weather experienced at this time (slower than normal feed rate). No noted extra mining activities detected at this time. Doc: Rev3-19.Aug.2016 Page 10

70 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date and Time Total Level [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 SVT Analysis Comments KLPL Provided Operations Information Residual Likelihood of Exceedance 19/07 5:45 AM Within time period where birds and traffic are typically more active. Plant shutdown at 3am Scheduled Planned Maintenance Shutdown. No noted extra mining activities detected at this time. Two filtered samples during the night time period are not within the time frame from 5:30 am to 9:00 am. These two samples (summarised in Table 3-5) are considered a low probability of exceedance as the total levels are significantly (>10 db) higher than the angle of interest levels indicating that the noise field is dominated by sources outside the angle of interest. Whilst the levels are above the assigned level on a 15 minute basis, the levels in the surrounding samples are lower before and after (see figures Figure 3-3 and Figure 3-4 for a plot of the levels around these two samples), these isolated short term changes in noise levels is not consistent with ongoing mining activity. Furthermore, when considering these samples in terms of a longer 3-4 hour assessment period, the likelihood of actual exceedance is further reduced. KLPL have also been able to provide shift notes for these periods identified. On the morning of the 26 th the notes indicate two dozers were in operation throughout the night shift period. As these were in continuous operation they would be unlikely to cause the short term change in noise level measured. Notes on the morning of the 10 th July indicate that there was no unusual mining activity at this time, and there was inclement weather experienced, which signifies that rain noise may have been present. Table 3-5: Night time filtered samples before 5:30am (assessed as a low likelihood of minesite related exceedance) Date and Time Total Level [dba] Angle of Interest Level [dba] SVT Analysis Comments KLPL Provided Operations Information Likelihood of Exceedance LAeq LAS10 LAeq LAS10 26/04 5:00 AM 10/07 11:45 PM Total levels significantly higher than Angle of Interest. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels significantly higher than Angle of Interest. Note 2 x dozers building slime dams all N/S. Note operator noise testing occurred at 2.30am Inclement weather experienced at this time. No noted extra mining activities detected at this time. Doc: Rev3-19.Aug.2016 Page 11

71 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Figure 3-3: Plot of noise levels surrounding the filtered sample of the 26/04/2016 5:00 AM Figure 3-4: Plot of noise levels surrounding the filtered sample of the 10/07/ :45 PM The remaining eleven filtered samples are during daytime hours, are temporary and isolated; and much higher than typical minesite operations noise. Again these isolated short term changes in noise levels is not consistent with ongoing mining activity. Where the data indicates unusually high levels of non minesite operations noise from outside the angle of interest, it is considered unlikely to be associated with the mine site. Furthermore, whilst the levels are above the assigned level on a 15 minute basis, when considering these samples in terms of a longer 3-4 hour assessment period, the likelihood of actual exceedance is further reduced. SVT has assessed these samples as a having low likelihood of minesite related noise exceedance. The BarnOwl noise monitoring system is (currently) not able to log 1/3 octave data, and therefore it is not possible to determine if a tonality adjustment should apply to the data. It is feasible that minesite noise at the logger could be tonal, and that if an adjustment was to be applied to the received noise level, exceedances could occur. However, based on the limited data available, SVT expects that tonality adjustments would not apply most of the time, and if they did the adjusted level would often not exceed the assigned levels. To assess this further, additional information is required Morning Period (between 5:30 am and 9:00 am) Of the 96 filtered samples, 83 of them occur in the time frame between 5:30 am and 9:00 am. This indicates that routine high levels of noise are measured during this time frame. To demonstrate this trend, SVT has averaged the entire data set into half hour blocks, the results are graphically Doc: Rev3-19.Aug.2016 Page 12

72 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q presented in Figure 3-5. In preparing this graph, SVT used an arithmetic average of the data, and excluded samples where wind speeds were greater than 3 m/s. Figure 3-5: Plot of average noise levels for every half hour throughout Q The graph demonstrates a large increase (>5 db) in the Angle of Interest and Total noise levels from 5:30 am onwards. This correlates with SVT s experience in noise monitoring at similar rural locations in the South-West where non-mining related sources (including noise from traffic, birds and other fauna) are often observed and can be significant after 4:30 am. Also overlaid on this graph (in Figure 3-5) are the plotted noise levels on the morning of the 18 th July 2016, where the mine site was undergoing a planned maintenance shut down from 3:00 am onwards 9. It can be seen around 5:30 am that the same increase in noise occurs as demonstrated in the average, adding further confidence that minesite operations noise does not cause this daily noise pattern. KLPL have confirmed that planned day shift mining activities start at 7:00 am, and therefore there should be minimal change in mining activity noise emissions prior to this time. The available audio files reviewed filtered samples of potential exceedance in this period were compared to some audio samples captured during earlier times of the morning (before 3 am where normal mine noise is expected with minimal interference from other sources). By comparing typical audio samples it was evident that the noise field after 5:30 am is significantly different, louder, and is dominated by traffic and bird noise. This adds to our confidence that the noise is not related to mining activities. Directional reports indicate that the noise during these samples is sometimes from a northerly direction, which may relate to bird noise in this direction (KLPL have advised of a bird roost located in vegetation 200m north of the Barn Owl) or morning traffic on the mine access road. 9 Also note, on this morning, that there is no notable change in noise at the time where the shutdown started. And, the spike in noise levels at 7:45 am is not due to minesite operations as there is no change to the Angle of Interest levels. Doc: Rev3-19.Aug.2016 Page 13

73 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Tonality The BarnOwl noise monitoring system is (currently) not able to log 1/3 octave data, and therefore it is not possible to determine if a tonality adjustment should apply to the data. The major minesite noise sources, including rotating machinery and mobile equipment, typically produce noise emissions with tonal characteristics. Therefore, it is reasonable to expect that the noise received from the mine will have some tonal characteristics. SVT s analysis of the logged monitoring data indicate that where night time mining noise is the dominant source, noise levels received at the noise monitor are typically from 25 to 33 dba 10. It is therefore feasible that minesite noise at the logger could be tonal, and that if an adjustment was to be applied to the received noise level, exceedances could occur. Based on observations of the live BarnOwl spectrum 11, it is evident that the noise immissions are tonal at 50 Hz and 100 Hz, and would meet the definition of tonality, although the A-weighted received levels in these 1/3 octave bands are typically below 20 dba, indicating that they are unlikely to be audible, and therefore should not be considered present in the noise immissions. Based on the limited data available, SVT expects that tonality adjustments would not apply most of the time, and if they did the adjusted level would often not exceed the assigned levels. 10 Based on a filtered dataset of the entire noise monitoring quarter, between 11pm and 5am, excluding periods where the wind speed is above 2 m/s, where the Angle of Interest levels are very low, or where the Total levels are much higher than the Angle of Interest levels. The remaining data set after applying these filters were 330 periods. Quoted level range includes +/- two standard deviations from the arithmetic average, which statistically includes 95% of the filtered dataset. 11 This data is linear weighted, and updates every 1 minute. Currently there is no method to log this data for post analysis. Samples assessed were at various times, including ~10:30pm, and 3:30 pm. Doc: Rev3-19.Aug.2016 Page 14

74 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q NOISE MANAGEMENT DISCUSSION 4.1 Noise Monitoring System In response to the Noise Monitoring and Quarter Two Noise Report, the Office of the Environmental Protection Authority (OEPA) recommends that tonality is incorporated into future monitoring. KLPL have now commissioned Brüel & Kjær to implement 1/3 octave data logging into the BarnOwl system, and this is expected to be completed in late September. This implementation will enable identification of tonality in the noise immissions, as well as allow for frequency filtering which will enable exclusion of insect and bird noise from the data. It was identified in the Q report that the alerts system is not triggering as often as it should. KLPL have adjusted the alerts system settings, and this issue has been resolved. For Q there appears to be an error with the export of the All Sources L Aeq Level, where the BarnOwl is exporting levels lower than expected. This has resulted in a larger than expected amount of samples considered for further investigation. More realistic All Sources L Aeq levels are reported in the directional charts; hence the error appears to be within the data export function of the system, and not within the noise monitor algorithm. 4.2 Noise Management System KLPL recently implemented MaestroMine, a noise management planning tool that enables them to plan mine activities to avoid situations that under predicted weather conditions will lead to a noncompliance with licence conditions. 75 of the 96 filtered samples identified had MaestroMine predicted levels, indicating that KLPL are now using MaestroMine as part of their daily planning exercises. The MaestroMine data provided to SVT contains the predicted noise level at the receiver based on KLPL s planned activities input into the program, and predicted weather at the time of input. SVT has been in regular communication with KLPL throughout this quarterly period, and are confident that KLPL are using the system correctly. It should be noted, however, that the cumulative noise prediction of mining operations could not be accurately presented by the system due to limitations in the configuration which saw the southern production bore (production bore pump #3) and wet concentrator plant inseparable within the noise management system. This meant that the bore pump was attached to the wet concentrator and other fixed plant that operate continuously. However, due to the proximity of the bore pump to the Lot 20 Hopelands Rd residence, KLPL were managing their noise by turning off the bore pump at night to avoid noise disturbances. The bore pump was not able to be turned off within the MaestroMine program, and has resulted in MaestroMine often predicting noise levels at night higher than it otherwise should. The MaestroMine system does however provide enough visibility of individual plant noise contributions in relation to receivers that their use can be managed. This aspect was resolved post the end of the monitoring quarter such that the southern bore pump is now isolated in the MaestroMine predictions. As a result the cumulative noise assessment feature of the system can now be more confidently used to forecast cumulative noise impacts at receivers. Doc: Rev3-19.Aug.2016 Page 15

75 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Despite the over prediction, within the 96 filtered samples there are no occasions where the MaestroMine predicted level exceeds the assigned level. In most cases, the prediction is at least 5 db below the assigned level. Furthermore, due to the current tonality unknowns, KLPL are utilising a 5 db buffer in their MaestroMine planning, which should lead to conservative planning and noise management. MaestroMine predictions have not been used by SVT to eliminate periods of potential exceedance. 4.3 General Noise Control and Management Within this quarter s monitoring period, KLPL have procured and installed a noise barrier around their southern bore pump, and noise measurements taken by SVT indicate the barrier is providing a 6 db reduction in noise at 100m from the pump in the direction of the receiver. SVT has been in regular communication with KLPL throughout this quarterly period assisting with noise management queries. SVT are confident that KLPL are managing their noise to a reasonably effective standard. Doc: Rev3-19.Aug.2016 Page 16

76 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q CONCLUSION SVT have assessed noise monitoring data for the third quarter of mining operations at Keysbrook (from 23 rd April 2016 to 22 nd July 2016). The BarnOwl noise monitoring system recorded the data for 98.5% of this three month period. A filtering process was applied to the total data set to identify 96 samples where there is a higher probability of mine site noise causing an exceedance of the assigned levels. Of the 96 filtered samples, 83 are within the 5:30 am to 9:00 am timeframe. SVT has assessed 79 of these as having a low likelihood of minesite related noise exceedance. This is based on several aspects of data review and analysis, SVT are reasonably confident that the majority of noise within this time frame (and monitoring samples assessed) is not due to mining operations, but rather from daily traffic patterns, birds, and other animals. Four filtered samples within the 5:30 am to 9:00 am time frame were initially assessed as a medium likelihood of exceedance for these samples a minesite related exceedance may have been possible given the limitations of the monitoring system, and the shortage of data available to prove otherwise. However, based on shift notes provided by KLPL, there were no unusual mining activities underway at these times, and SVT assessed the residual likelihood of exceedance as low. Two filtered samples occur at night time (before 5:30 am), where the data indicates unusually high levels of short term, non-mining operations related noise, unlikely to be associated with the mine site. SVT considers these samples as a low likelihood of minesite related noise exceedance. The remaining eleven filtered samples are: during daytime hours; are temporary and isolated; and, much higher than typical minesite operations noise. Where the data indicates isolated samples exhibit unusually high levels of noise, it is considered unlikely to be associated with the mine site. SVT has assessed these samples as a having low likelihood of minesite related noise exceedance. The BarnOwl noise monitoring system is (currently) not able to log 1/3 octave data, and therefore it is not possible to determine if a tonality adjustment should apply to the data. It is feasible that minesite noise at the logger could be tonal, and that if an adjustment was to be applied to the received noise level, exceedances could occur. However, based on the limited data available, SVT expects that tonality adjustments would not apply most of the time, and if they did the adjusted level would often not exceed the assigned levels. To assess this further, additional information is required. Based on the available data, and respecting the limitations of the monitoring system, there were no assigned level exceedance within the quarter that could, with a high degree of confidence, be attributed to mining noise. Recommendations As outlined in section 4, KLPL have taken steps to improve the noise monitoring and management system outputs, and reduce their noise emissions to the community. SVT have the following further recommendations: Continue to expedite the implementation of 1/3 octave data logging into the BarnOwl system. Consider attended noise monitoring on a suitable morning to increase confidence in the findings that increases in noise levels after 5:30 am are not due to mine generated noise. Doc: Rev3-19.Aug.2016 Page 17

77 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX A MAPS OF THE KEYSBROOK MINE SITE Figure 5-1: Aerial view of the Keysbrook mine site. Doc: Rev3-19.Aug.2016 A-1

78 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Figure 5-2: Location of Keysbrook Logging Station. Doc: Rev3-19.Aug.2016 A-2

79 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX B DETAILS OF FURTHER INVESTIGATION Date and Time (start of 15 min sample) Total Level [dba] Level of All Directionally Identified Sources [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Directi on Assess ment Period Day Assigned Level LA10 [dba] (A) Exceedanc e of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available Maestro Predicted Level [dba] SVT Analysis Comments SVT Comments on Audio and Directional Reports Likelihood of Exceedance 25/04 6:30 AM N Night Monday 36 TRUE TRUE FALSE TRUE TRUE FALSE /04 8:30 AM SW Night Monday 36 TRUE TRUE FALSE TRUE TRUE FALSE 23 25/04 12:00 PM SW Sun/PH Day 26/04 5:00 AM W Night 27/04 6:15 AM N Night 27/04 6:30 AM N Night 28/04 6:30 AM N Night 28/04 8:30 AM NW Day 30/04 5:45 PM S Day Monday 41 TRUE TRUE FALSE TRUE TRUE FALSE 23.7 Tuesda y Wednes day Wednes day Thursda y Thursda y Saturda y 36 TRUE TRUE TRUE FALSE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE /05 8:15 AM E Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE 35 8/05 7:30 AM NE Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:15 AM N Night 10/05 6:45 AM E Night Tuesda y Tuesda y 36 TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE 29.4 Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Isolated daytime exceedance. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Doc: Rev3-19.Aug.2016 B-1

80 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date and Time (start of 15 min sample) Total Level [dba] Level of All Directionally Identified Sources [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Directi on Assess ment Period Day Assigned Level LA10 [dba] (A) Exceedanc e of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available Maestro Predicted Level [dba] SVT Analysis Comments SVT Comments on Audio and Directional Reports Likelihood of Exceedance 11/05 6:45 AM N Night 12/05 5:30 AM SE Night 12/05 5:45 AM N Night 12/05 6:00 AM E Night 12/05 6:15 AM NE Night 12/05 6:30 AM N Night Wednes day Thursda y Thursda y Thursda y Thursda y Thursda y 36 TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE /05 5:30 AM N Night Friday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:00 AM N Night Friday 36 TRUE TRUE FALSE TRUE TRUE TRUE /05 6:15 AM N Night Friday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:00 AM NE Night 14/05 6:15 AM NE Night 17/05 5:45 AM N Night 17/05 6:00 AM N Night 17/05 6:15 AM N Night 17/05 6:30 AM N Night 17/05 6:45 AM N Night 18/05 5:30 AM NW Night Saturda y Saturda y Tuesda y Tuesda y Tuesda y Tuesda y Tuesda y Wednes day 36 TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE N/A 36 TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE 30 Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Mild bird noise. Can hear constant traffic noise in the background. Presumed traffic noise is the dominant noise source. Directionality plot show noise from the Northerly direction. Traffic noise is the dominant noise source. Directionality plot show noise from the W to N. Dominant noise is from bird. Mild machinery noise in the background. Dirctionality plot show noise from NW to NE direction Medium Medium Doc: Rev3-19.Aug.2016 B-2

81 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date and Time (start of 15 min sample) Total Level [dba] Level of All Directionally Identified Sources [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Directi on Assess ment Period Day Assigned Level LA10 [dba] (A) Exceedanc e of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available Maestro Predicted Level [dba] SVT Analysis Comments SVT Comments on Audio and Directional Reports Likelihood of Exceedance 18/05 5:45 AM N Night 18/05 6:00 AM NE Night 18/05 6:15 AM N Night 18/05 6:30 AM NE Night 18/05 6:45 AM E Night 19/05 6:30 AM E Night Wednes day Wednes day Wednes day Wednes day Wednes day Thursda y 36 TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE /05 6:15 AM NE Night Friday 36 TRUE TRUE FALSE TRUE TRUE FALSE 29 21/05 9:30 AM W Day 25/05 8:30 AM W Day Saturda y Wednes day 46 TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE /05 5:45 AM E Night Friday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:00 AM SE Night Friday 36 TRUE TRUE FALSE TRUE TRUE TRUE /05 6:15 AM NW Night Friday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:30 AM E Night Friday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:45 AM E Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE 22.8 Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Wind generated foliage noise feasible as wind speed > 4m/s. Isolated daytime exceedance. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Dominant noise is from bird. Mild machinery noise in the background. Directionality plot show noise from NW direction Dominant noise is from traffic in the NW direction. Possibly plant or traffic noise. Medium Doc: Rev3-19.Aug.2016 B-3

82 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date and Time (start of 15 min sample) Total Level [dba] Level of All Directionally Identified Sources [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Directi on Assess ment Period Day Assigned Level LA10 [dba] (A) Exceedanc e of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available Maestro Predicted Level [dba] SVT Analysis Comments SVT Comments on Audio and Directional Reports Likelihood of Exceedance 29/05 7:45 AM SE Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 8:00 AM SE Night Sunday 36 TRUE TRUE FALSE TRUE TRUE TRUE /05 8:15 AM E Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 8:30 AM SE Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 8:45 AM SE Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 10:30 AM NW Sun/PH Day Sunday 41 TRUE TRUE FALSE TRUE TRUE FALSE /05 5:45 AM SE Night Monday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:00 AM SE Night Monday 36 TRUE TRUE FALSE TRUE TRUE TRUE /05 6:15 AM S Night Monday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:30 AM S Night Monday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 6:45 AM S Night Monday 36 TRUE TRUE FALSE TRUE TRUE FALSE /05 8:00 AM E Day 9/06 6:45 AM N Night Tuesda y Thursda y 46 TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE N/A 19/06 5:45 AM N Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE /06 6:00 AM N Night Sunday 36 TRUE TRUE FALSE TRUE TRUE TRUE 34.4 Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total LAeq significantly higher than Total LAS10. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Within time frame where birds and traffic are typically more active. Within time frame where birds and traffic are typically more active. Bird noise dominant in audio. Directionality plot show noise from all angles Traffic noise is dominant. Directionality plot shows that noise is from the North. Unable to open directionality plot. In audio there is minimal bird noise. Dominant noise is traffic Doc: Rev3-19.Aug.2016 B-4

83 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date and Time (start of 15 min sample) Total Level [dba] Level of All Directionally Identified Sources [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Directi on Assess ment Period Day Assigned Level LA10 [dba] (A) Exceedanc e of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available Maestro Predicted Level [dba] SVT Analysis Comments SVT Comments on Audio and Directional Reports Likelihood of Exceedance 19/06 7:30 AM N Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE /06 2:00 PM NW Sun/PH Day Sunday 41 TRUE TRUE FALSE TRUE TRUE TRUE /06 8:15 AM S Day Monday 46 TRUE TRUE FALSE TRUE TRUE FALSE /06 8:30 AM NW Day 25/06 6:45 AM N Night Tuesda y Saturda y 46 TRUE TRUE FALSE TRUE TRUE FALSE N/A 36 TRUE TRUE FALSE TRUE TRUE FALSE N/A 27/06 9:30 AM N Day Monday 46 TRUE TRUE FALSE TRUE TRUE FALSE N/A 28/06 5:30 AM N Night 29/06 6:45 AM NE Night 29/06 8:15 AM NE Day 30/06 8:00 AM NE Day Tuesda y Wednes day Wednes day Thursda y 36 TRUE TRUE FALSE TRUE TRUE FALSE N/A 36 TRUE TRUE FALSE TRUE TRUE FALSE N/A 46 TRUE TRUE FALSE TRUE TRUE FALSE N/A 46 TRUE TRUE FALSE TRUE TRUE FALSE N/A 1/07 4:00 PM SE Day Friday 46 TRUE TRUE FALSE TRUE TRUE TRUE N/A 2/07 7:30 AM E Day 2/07 8:00 AM E Day Saturda y Saturda y 46 TRUE TRUE FALSE TRUE TRUE FALSE N/A 46 TRUE TRUE FALSE TRUE TRUE TRUE N/A Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Wind generated foliage noise feasible as wind speed > 4m/s. Total LAeq significantly higher than Total LAS10. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. Bird noise dominant. Directionality plot shows major noise sources from all direction. Bird noise dominant. Dirctionality plot shows major noise sources from all direction. Bird noise with very low machinery noise in the background. Dirctionality plot shows major noise sources from all direction. Doc: Rev3-19.Aug.2016 B-5

84 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date and Time (start of 15 min sample) Total Level [dba] Level of All Directionally Identified Sources [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Directi on Assess ment Period Day Assigned Level LA10 [dba] (A) Exceedanc e of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates 3/07 8:00 AM NE Night Sunday 36 TRUE TRUE FALSE TRUE TRUE TRUE N/A 3/07 10:15 AM S Sun/PH Day (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available Maestro Predicted Level [dba] Sunday 41 TRUE TRUE FALSE TRUE TRUE FALSE N/A 4/07 7:15 AM SE Day Monday 46 TRUE TRUE TRUE FALSE TRUE FALSE N/A 5/07 8:15 AM N Day 6/07 7:15 AM NE Day Tuesda y Wednes day 46 TRUE TRUE FALSE TRUE TRUE FALSE N/A 46 TRUE TRUE FALSE TRUE TRUE FALSE N/A 10/07 7:15 AM NE Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE N/A 10/07 5:45 PM SE 10/07 11:45 PM Sun/PH Day SVT Analysis Comments Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. SVT Comments on Audio and Directional Reports Bird Noise. Dominant noise from Southerly direction. Sunday 41 TRUE TRUE FALSE TRUE TRUE FALSE N/A NE Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE N/A 12/07 6:45 AM SE Night 14/07 3:45 PM N Day Tuesda y Thursda y 36 TRUE TRUE FALSE TRUE TRUE FALSE N/A 46 TRUE TRUE FALSE TRUE TRUE FALSE /07 5:30 AM W Night Sunday 36 TRUE TRUE TRUE FALSE TRUE FALSE /07 5:45 AM W Night Sunday 36 TRUE TRUE TRUE FALSE TRUE FALSE /07 7:15 AM NW Night Sunday 36 TRUE TRUE FALSE TRUE TRUE FALSE /07 8:00 AM W Night Sunday 36 TRUE TRUE TRUE FALSE TRUE TRUE 22.2 Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Wind generated foliage noise feasible as wind speed > 4m/s. Total LAeq significantly higher than Total LAS10. Isolated daytime exceedance. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. MaestroMine predicted levels are at least 5 db below the assigned level. Traffic noise. Directionality plot shows dominant noise coming from all directions. Recording is clipped Likelihood of Exceedance Doc: Rev3-19.Aug.2016 B-6

85 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Date and Time (start of 15 min sample) Total Level [dba] Level of All Directionally Identified Sources [dba] Angle of Interest Level [dba] LAeq LAS10 LAeq LAS10 LAeq LAS10 Wind Speed [m/s] Wind Directi on Assess ment Period Day Assigned Level LA10 [dba] (A) Exceedanc e of LA10 Assigned Level (B) Wind <5m/s (C) Angle of Interest LAS10 Exceeds Assigned Level (D) Angle of Interest Dominates (E) Angle of Interest LAeq within 10dB of Assigned Level Alert Data Available Maestro Predicted Level [dba] SVT Analysis Comments SVT Comments on Audio and Directional Reports Likelihood of Exceedance 17/07 5:00 PM NW Sun/PH Day 19/07 5:45 AM N Night 19/07 6:00 AM NE Night 19/07 6:30 AM NE Night 19/07 6:45 AM NE Night 19/07 7:45 AM NE Day 20/07 5:30 AM N Night 20/07 5:45 AM NE Night 20/07 6:00 AM NE Night 20/07 6:45 AM E Night Sunday 41 TRUE TRUE FALSE TRUE TRUE TRUE 28.2 Tuesda y Tuesda y Tuesda y Tuesda y Tuesda y Wednes day Wednes day Wednes day Wednes day 36 TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE TRUE 32.5 Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Total LAeq significantly higher than Total LAS10. Within time frame where birds and traffic are typically more active. Isolated daytime exceedance. MaestroMine predicted levels are at least 5 db below the assigned level. Within time frame where birds and traffic are typically more active. Within time frame where birds and traffic are typically more active. Within time frame where birds and traffic are typically more active. Total levels or All Directionally Identifiable Sources levels significantly higher than Angle of Interest. Within time frame where birds and traffic are typically more active. Wind and bird noise. There is 1 file for this Constant low frequency noise in the northerly possible plant or traffic noise. There are 1 files for this time frame. Noise dominant in the NE direction. Constant low frequency noise in the northerly possible plant or traffic noise. There are 5 files for this time frame Some dog barks in audio file. Traffic noise dominant in northerly direction with some bird noise. There are 5 files for this time frame Constant traffic noise with birds in background There are 6 files for this time frame Strong northerly traffic noise. Can hear birds Medium Doc: Rev3-19.Aug.2016 B-7

86 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX C REPORT SAMPLE OF DIRECTIONAL NOISE ALERT Figure 5-3: Example of a BarnOwl directional report. Doc: Rev3-19.Aug.2016 C-1

87 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q APPENDIX D INFLUENCING FACTOR CALCULATIONS Appendix D-1 Environmental Protection (Noise) Regulations Assigned Noise Levels Management of industrial noise in Western Australia is implemented through the WA Environmental Protection (Noise) Regulations 1997 which operate under the Environmental Protection Act The Regulation specify maximum noise levels (Assigned Noise Levels) which are the highest noise levels that can be received at noise-sensitive (residential), commercial and industrial premises. For noise sensitive premises, i.e. residences, an influencing factor is incorporated into the assigned noise levels. The influencing factor depends on land use zonings within circles of 100 metres and 450 metres radius from the noise receiver, including: the proportion of industrial land use zonings; the proportion of commercial zonings; and the presence of major roads. The presence of major roads, infrastructure or industrial developments (or zoning for those developments) can result in influencing factors in a range from 0 to 20dB. The regulations categorises land on which a mining operation is carried on as industrial premises for the purposes of calculating the influencing factor. For noise sensitive residences, the time of day also affects the assigned levels. The regulations define three types of assigned noise level: L Amax Assigned Noise Level means a noise level which is not to be exceeded at any time; L A1 Assigned Noise Level which is not to be exceeded for more than 1% of the time; and L A10 Assigned Noise Level which is not to be exceeded for more than 10% of the time. Table C-5-1 below presents the generic Assigned Noise Levels for noise sensitive premises defined in the regulations. Table C-5-1 Assigned noise levels Type of premises receiving noise Time of day Assigned Noise Levels dba LA 10 LA 1 LA max Noise sensitive premises: highly sensitive area Noise sensitive premises: any area other than highly sensitive area 0700 to 1900 hours Monday to Saturday 0900 to 1900 hours Sundays and public holidays 1900 to 2200 hours all days hours on any day Monday to Saturday & hours Sunday and public holidays 45 + influencing factor 40 + influencing factor 40 + influencing factor 35 + influencing factor 55 + influencing factor 50 + influencing factor 50 + influencing factor 45 + influencing factor 65 + influencing factor 65 + influencing factor 55 + influencing factor 55 + influencing factor All hours Doc: Rev3-19.Aug.2016 D-2

88 Client: Keysbrook Leucoxene Pty Ltd Subject: Keysbrook Environmental Noise Compliance Reporting Q Appendix D-2 NSR 1 Influencing Factor Calculation Appendix Figure D-1 presents the location of NSR 1, reach of the 100 m and 450 m circles used for the Assigned Level Calculations, and area considered industrial. The calculation of the influencing factor was based on vector map data supplied by KLPL. Appendix Table D-1 details the influencing factor calculation results. Appendix Figure D-1: Shows the location of NSR 1, reach of the 100 m and 450 m circles used for the Assigned Level Calculations, and area considered industrial Appendix Table D-1: Parameters used in calculating the Influencing Factor for current land use at NSR 1 Influencing Factor Variables Within 100 metres of receiver Within 450 metres of receiver Contribution to Influencing Factor, [db] Percentage of Type A premises (industrial) 0% 5.2% 0.52 Percentage of Type B premises (commercial) 0% 0% 0 Major roads Secondary roads Calculated Influencing Factor [db] 1 Doc: Rev3-19.Aug.2016 D-3

89 MZI RESOURCES LIMITED KEYSBROOK MINERAL SANDS PROJECT COMPLIANCE ASSESSMENT REPORT 2016 APPENDIX 6: ENVIRONMENTAL LICENCE 8919/2015/1 Compliance Assessment Report 2016 FINAL.docx

90 Licence Environmental Protection Act 1986, Part V Licensee: Licence: Keysbrook Leucoxene Pty Ltd L8918/2015/1 Registered office: Level 2, 100 Royal Street EAST PERTH WA 6004 ACN: Premises address: Keysbrook Mineral Sands Mine 1391 Hopeland Road NORTH DANDALUP WA 6207 Being Lot 1 on Diagram 8916, Lot 6 on Diagram 52395, Lot 52, 59, 62 & 63 on Plan 739, Lots on Diagram and Lot 300 on Diagram 31012, as depicted in Schedule 1. Issue date: Thursday, 19 November 2015 Commencement date: Monday, 23 November 2015 Expiry date: Thursday, 29 June 2023 Prescribed premises category Schedule 1 of the Environmental Protection Regulations 1987 Category number Category description 6 Mine dewatering: premises on which water is extracted and discharged into the environment to allow the mining of ore. 8 Mineral sands mining or processing: premises on which mineral sands ore is mined, screened, separated or otherwise processed. Category production or design capacity 50,000 tonnes or more per year 5,000 tonnes or more per year Approved Premises production or design capacity 150,000 tonnes per annual period 5,250,000 tonnes per annual period Conditions This Licence is subject to the conditions set out in the attached pages. Date Signed: 19 November Danielle Eyre Senior Manager Industry Regulation (Resource Industries) Officer delegated under section 20 of the Environmental Protection Act 1986 Environmental Protection Act 1986 Page 1 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

91 Contents Introduction 2 Licence conditions 4 1 General 4 2 Emissions 6 3 Monitoring 6 4 Improvements 8 5 Information 9 Schedule 1: Maps 11 Schedule 2: Reporting & notification forms 14 Introduction This Introduction is not part of the Licence conditions. DER s industry licensing role The Department of Environment Regulation (DER) is a government department for the state of Western Australia in the portfolio of the Minister for Environment. DER s purpose is to advise on and implement strategies for a healthy environment for the benefit of all current and future Western Australians. DER has responsibilities under Part V of the Environmental Protection Act 1986 (the Act) for the licensing of prescribed premises. Through this process DER regulates to prevent, control and abate pollution and environmental harm to conserve and protect the environment. DER also monitors and audits compliance with works approvals and licence conditions, takes enforcement action as appropriate and develops and implements licensing and industry regulation policy. Licence requirements This Licence is issued under Part V of the Act. Conditions contained within the Licence relate to the prevention, reduction or control of emissions and discharges to the environment and to the monitoring and reporting of them. Where other statutory instruments impose obligations on the Premises/Licensee the intention is not to replicate them in the licence conditions. You should therefore ensure that you are aware of all your statutory obligations under the Act and any other statutory instrument. Legislation can be accessed through the State Law Publisher website using the following link: For your Premises relevant statutory instruments include but are not limited to obligations under the: Environmental Protection (Unauthorised Discharges) Regulations 2004 these Regulations make it an offence to discharge certain materials such as contaminated stormwater into the environment other than in the circumstances set out in the Regulations. Environmental Protection (Controlled Waste) Regulations these Regulations place obligations on you if you produce, accept, transport or dispose of controlled waste. Environmental Protection (Noise) Regulations 1997 these Regulations require noise emissions from the Premises to comply with the assigned noise levels set out in the Regulations. You must comply with your licence. Non-compliance with your licence is an offence and strict penalties exist for those who do not comply. Licence holders are also reminded of the requirements of section 53 of the Act which places restrictions on making certain changes to prescribed premises unless the changes are in accordance with a works approval, licence, closure notice or environmental protection notice. Environmental Protection Act 1986 Page 2 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

92 Licence fees If you have a licence that is issued for more than one year, you are required to pay an annual licence fee prior to the anniversary date of issue of your licence. Non-payment of annual licence fees will result in your licence ceasing to have effect meaning that it will no longer be valid and you will need to apply for a new licence for your Premises. Ministerial conditions If your Premises has been assessed under Part IV of the Act you may have had conditions imposed by the Minister for Environment. You are required to comply with any conditions imposed by the Minister. Premises description and Licence summary The premises is a newly established (2015) heavy mineral sands mine located near North Dandalup, approximately 70 km south of Perth. The mine is subject to Ministerial Statement 810, and is spread across 1,366 ha of privately owned land with multiple owners on pre-1899 land titles (minerals to owner). The southern part of the mine is located 0.5 km from the North Dandalup township; there are 10 receptors within 0.3 km of the premises boundary, and a further 36 receptors within a 1.5 km radius. Mining will be carried out by dry mining techniques using free dig truck and shovel, with mined ore screened and pumped as a slurry to a concentrator plant, where the titanium minerals will be separated from clay fines and quartz sand fractions to produce heavy mineral concentrate (HMC). HMC will be stockpiled on-site and transported 124 km south to the Doral Mineral Separation Plant at Picton for further processing. The superficial aquifer will require some dewatering during the winter months to allow mining below the water table. Sand and clay fractions will be returned to mine voids as part of the rehabilitation process. The primary emissions and discharges relate to noise and fugitive dust from continuous (24 hours per day) mining operations, in addition to discharge of excess process water to surface water during the winter months. Additional environmental considerations include the potential for disturbing acid sulfate soils, and the on-site disposal of processing wastes including tailings from secondary processing. This Licence is for the operation of a new facility established under works approval W5386/2013/1. The licences and works approvals issued for the Premises under Division 3, Part V of the Act are: Instrument log Instrument Issued Description W5386/2013/1 27/03/2014 Works approval issued to MZI Resources for mine establishment. L8918/2015/1 19/11/2015 Initial licence issued to Keysbrook Leucoxene Pty Ltd to authorise mining operations. Severance It is the intent of these Licence conditions that they shall operate so that, if a condition or a part of a condition is beyond the power of this Licence to impose, or is otherwise ultra vires or invalid, that condition or part of a condition shall be severed and the remainder of these conditions shall nevertheless be valid to the extent that they are within the power of this Licence to impose and are not otherwise ultra vires or invalid. END OF INTRODUCTION Environmental Protection Act 1986 Page 3 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

93 Licence conditions 1 General 1.1 Interpretation In the Licence, definitions from the Environmental Protection Act 1986 apply unless the contrary intention appears For the purposes of this Licence, unless the contrary intention appears: Act means the Environmental Protection Act 1986; AHD means the Australian height datum; annual period means the inclusive period from 1 January until 31 December in the same year; AS 2531 means the Australian Standard AS Waters Determination of gross alpha and gross beta activities; AS/NZS means the Australian Standard AS/NZS Water Quality Sampling Guidance of the Design of sampling programs, sampling techniques and the preservation and handling of samples; AS/NZS means the Australian Standard AS/NZS Water Quality Sampling Guidance on sampling of rivers and streams; AS/NZS means the Australian Standard AS/NZS Water Quality Sampling Guidance on sampling of groundwaters; averaging period means the time over which a limit is measured or a monitoring result is obtained; Bq/L means becquerels per litre; Category 3 TSF means a Tailings Storage Facility with a low hazard rating and maximum structure height of < 5 m, as determined by reference to the document titled Guidelines on the Safe Design and Operating Standards for Tailings Storage published by the Department of Minerals and Energy (1999); CEO means Chief Executive Officer of the Department of Environment Regulation; CEO for the purpose of correspondence means; Chief Executive Officer Department administering the Environmental Protection Act 1986 Locked Bag 33 CLOISTERS SQUARE WA info@der.wa.gov.au; Licence means this Licence numbered L8918/2015/1 and issued under the Act; Licensee means the person or organisation named as Licensee on page 1 of the Licence; NATA means the National Association of Testing Authorities, Australia; NATA accredited means in relation to the analysis of a sample that the laboratory is NATA accredited for the specified analysis at the time of the analysis; Environmental Protection Act 1986 Page 4 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

94 Premises means the area defined in the Premises Map in Schedule 1 and listed as the Premises address on page 1 of the Licence; Schedule 1 means Schedule 1 of this Licence unless otherwise stated; Schedule 2 means Schedule 2 of this Licence unless otherwise stated; spot sample means a discrete sample representative at the time and place at which the sample is taken; and µs/cm means microsiemens per centimetre Any reference to an Australian or other standard in the Licence means the relevant parts of the standard in force from time to time during the term of this Licence Any reference to a guideline or code of practice in the Licence means the version of that guideline or code of practice in force from time to time, and shall include any amendments or replacements to that guideline or code of practice made during the term of this Licence. 1.2 Premises operation The Licensee shall ensure that all thickener underflow, tailings, and return water pipelines are: (a) equipped with automatic cut-outs in the event of a pipe failure; or (b) provided with secondary containment sufficient to contain any spill for a period equal to the time between routine inspections; or (c) equipped with telemetry systems and pressure sensors along pipelines to allow the detection of leaks and failures The Licensee shall ensure that materials listed in Table are only discharged into the corresponding infrastructure detailed in Table Table 1.2.1: Containment infrastructure Infrastructure Material Infrastructure requirements In-pit tailings storage facilities Solar evaporation ponds Process water pond Quartzose sands, minor clay, unrecovered heavy mineral, trash mineral tailings from secondary processing (Picton tails) Thickener underflow (clay fines) Process water (dewater effluent, tails return water, recycled process water) and harvested stormwater Constructed to the specifications of a Category 3 TSF; Decant weir boxes and overflow drains to the process water pond; Depth markers are maintained; Water levels to be maintained at least 500 mm below the top of the wall. Lined to achieve a permeability of at least <1 x 10-9 m/s (or equivalent); ph and EC probes on overflow point; Flow metering device on overflow point The Licensee shall: (a) undertake inspections as detailed in Table 1.2.2; (b) where any inspection identifies that an appropriate level of environmental protection is not being maintained, take corrective action to mitigate adverse environmental consequences as soon as practicable; and (c) maintain a record of all inspections undertaken. Table 1.2.2: Inspection of infrastructure Scope of inspection Type of inspection Frequency of inspection Thickener underflow and tailings pipelines Return water pipelines Solar evaporation ponds Visual integrity and leak assessment Daily whilst operating, Monthly if not operating Environmental Protection Act 1986 Page 5 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

95 2 Emissions 2.1 General The Licensee shall record and investigate the exceedance of any descriptive or numerical limit specified in any part of section 2 of this Licence. 2.2 Point source emissions to surface water The Licensee shall ensure that where waste is emitted to surface water from the emission points in Table and identified on the map of emission points in Schedule 1 it is done so in accordance with the conditions of this Licence. Table 2.2.1: Emission points to surface water Emission point Description reference and location on Map of emission points W1 Overflow from the process water pond into Balgobin Brook South tributary, via a lined spillway Source including abatement Process water and harvested stormwater, treated via settling with sufficient residence time to reduce suspended solids 2.3 Emissions to land The Licensee shall ensure that where waste is emitted to land from the emission points in Table it is done so in accordance with the conditions of this Licence. Table 2.3.1: Emission points to land Emission point Description Source including abatement reference L1 mine voids In-pit disposal Quartzose sand tails, minor clay and unrecovered heavy mineral from the wet concentrator plant (WCP) Dried clay slimes from solar evaporation ponds Picton tails, blended with WCP tailings The Licensee shall not cause or allow emissions to land greater than the limits listed in Table Table 2.3.2: Emission limits to land Emission point Parameter Limit (including units) Averaging period reference L1 mine voids Thorium 244 ppm Each processing campaign Uranium 79 ppm at Picton 3 Monitoring 3.1 General monitoring The licensee shall ensure that: (a) all water samples are collected and preserved in accordance with AS/NZS ; (b) all surface water sampling is conducted in accordance with AS/NZS ; (c) all groundwater sampling is conducted in accordance with AS 2531 and AS/NZS ; and (d) all laboratory samples are submitted to and tested by a laboratory with current NATA accreditation for the parameters being measured unless indicated otherwise in the relevant table. Environmental Protection Act 1986 Page 6 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

96 3.1.2 The Licensee shall ensure that: (a) weekly monitoring is undertaken at least 5 days apart; (b) monthly monitoring is undertaken at least 15 days apart; (c) quarterly monitoring is undertaken at least 45 days apart; and (d) annual monitoring is undertaken at least 9 months apart The Licensee shall ensure that all monitoring equipment used on the Premises to comply with the conditions of this Licence is calibrated in accordance with the manufacturer s specifications The Licensee shall, where the requirements for calibration cannot be practicably met, or a discrepancy exists in the interpretation of the requirements, bring these issues to the attention of the CEO accompanied with a report comprising details of any modifications to the methods. 3.2 Monitoring of point source emissions to surface water The Licensee shall undertake the monitoring in Table according to the specifications in that table. Table 3.2.1: Monitoring of point source emissions to surface water Monitoring point Parameter Units Frequency 1 reference SW1 process water pond overflow point Volumetric flow rate 1 m 3 /d Daily when discharging 3 ph 1 - Weekly when Total dissolved solids (TDS) 1 mg/l discharging Total suspended solids (TSS) Total titratable acidity (TTA) Monthly Sulfate Aluminium, arsenic, chromium, copper, lead, manganese, nickel, zinc, total recoverable hydrocarbons, ammonium Note 1: Sampling shall occur on the first day of discharge, then weekly/monthly thereafter. Note 2: In-field non-nata accredited analysis permitted. Note 3: Availability 90% of the measurement intervals on a monthly basis. 3.3 Process monitoring The Licensee shall undertake the monitoring in Table according to the specifications in that table. Table 3.3.1: Process monitoring Monitoring point reference Process description Parameter Units Frequency Method - Disposal of Picton tails Volume and location of Picton tails disposed on the Premises Wet tonnes Monthly None specified Environmental Protection Act 1986 Page 7 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

97 3.4 Ambient environmental quality monitoring The Licensee shall undertake the monitoring in Tables according to the specifications in those tables. Table 3.4.1: Monitoring of ambient surface water quality Monitoring point Parameter Units Averaging Frequency reference period WQ1 2 ph 1 ph unit Spot sample Monthly, when WQ2 WQ3 3 Electrical 25 C 1 µs/cm flowing Total dissolved solids 1 mg/l Total suspended solids Sulfate Note 1: In-field non-nata accredited analysis permitted. Note 2: Upstream of the discharge location W1. Note 3: Downstream of the discharge location W1. Table 3.4.2: Monitoring of ambient groundwater quality Monitoring point Parameter Units Averaging Frequency reference and location period GQ1 GQ22 Standing water level 1 m AHD Spot sample Monthly ph 1 ph unit Electrical 25 C 1 µs/cm Total dissolved solids 1 mg/l Total titratable acidity Quarterly Total alkalinity Sulfate Aluminium, arsenic, chromium, Annual copper, lead, manganese, nickel, zinc, total petroleum hydrocarbons, ammonium Gross alpha activity 2 Bq/L Gross beta activity 2 Note 1: In-field non-nata accredited analysis permitted. Note 2: To be monitored in bores where total titratable acidity is 40 mg/l. 4 Improvements 4.1 Improvement program The Licensee shall complete the improvements in Table by the date of completion in Table The Licensee, for improvements not specifically requiring a written submission, shall write to the CEO stating whether and how the Licensee is compliant with the improvement within one week of the completion date specified in Table Table 4.1.1: Improvement program Improvement Improvement reference IR1 The Licensee shall prepare and submit to the CEO an Environmental Radiation Management Plan. The plan shall be separate to the site s existing Radiation Management Plan and shall address radiation protection of the environment, including the identification and assessment of environmental exposure pathways. Date of completion Prior to the disposal of Picton tails on the Premises Environmental Protection Act 1986 Page 8 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

98 5 Information 5.1 Records All information and records required by the Licence shall: (a) be legible; (b) if amended, be amended in such a way that the original and subsequent amendments remain legible or are capable of retrieval; (c) except for records listed in 5.1.1(d) be retained for at least 6 years from the date the records were made or until the expiry of the Licence or any subsequent licence; and (d) for those following records, be retained until the expiry of the Licence and any subsequent licence: (i) off-site environmental effects; or (ii) matters which affect the condition of the land or waters The Licensee shall complete an Annual Audit Compliance Report indicating the extent to which the Licensee has complied with the conditions of the Licence, and any previous licence issued under Part V of the Act for the Premises for the previous annual period The Licensee shall implement a complaints management system that as a minimum records the number and details of complaints received concerning the environmental impact of the activities undertaken at the Premises and any action taken in response to the complaint. 5.2 Reporting The Licensee shall submit to the CEO an Annual Environmental Report by 1 March in each year. The report shall contain the information listed in Table in the format or form specified in that table. Table 5.2.1: Annual Environmental Report Condition or Parameter Format or form 1 table - Summary of any failure or malfunction of any pollution control None specified equipment and any environmental incidents that have occurred during the annual period and any action taken - Volume of overburden removed, ore processed, HMC produced, tails returned to mine voids, Picton tails returned to the mine for blending and disposal Table Monitoring of point source emissions to surface water Table Process monitoring Table Monitoring of ambient surface water quality Table Monitoring of ambient groundwater quality Compliance Annual Audit Compliance Report (AACR) Complaints summary None specified Note 1: Forms are in Schedule The Licensee shall ensure that the Annual Environmental Report also contains an assessment of the information contained within the report against previous monitoring results and Licence limits. Environmental Protection Act 1986 Page 9 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

99 5.2.3 The Licensee shall submit the information in Table to the CEO according to the specifications in that table. Table 5.2.2: Non-annual reporting requirements Condition or Parameter table (if relevant) - Copies of original monitoring reports submitted to the Licensee by third parties Note 1: Forms are in Schedule Notification Reporting period Not Applicable Reporting date (after end of the reporting period) Within 14 days of the CEOs request Format or form 1 As received by the Licensee from third parties The Licensee shall ensure that the parameters listed in Table are notified to the CEO in accordance with the notification requirements of the table. Table 5.3.1: Notification requirements Condition or table Parameter Notification requirement 1 Format or form Breach of any limit Part A: As soon as practicable but no later N1 specified in the Licence than 5pm of the next usual working day Part B: As soon as practicable Calibration report As soon as practicable None specified Note 1: Notification requirements in the Licence shall not negate the requirement to comply with s72 of the Act. Note 2: Forms are in Schedule 2. Environmental Protection Act 1986 Page 10 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

100 Schedule 1: Maps Premises map The Premises is shown in the map below. The red line depicts the Premises boundary and excludes Lots 101, 103, 104 and 105. Environmental Protection Act 1986 Page 11 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

101 Map of emission points The locations of the emission points defined in Tables and are shown below. The yellow shaded areas depict the mine voids. Environmental Protection Act 1986 Page 12 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

102 Map of monitoring locations The locations of the monitoring points defined in Tables and are shown below. Environmental Protection Act 1986 Page 13 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

103 Schedule 2: Reporting & notification forms These forms are provided for the proponent to report monitoring and other data required by the Licence. They can be requested in an electronic format. ANNUAL AUDIT COMPLIANCE REPORT PROFORMA SECTION A LICENCE DETAILS Licence Number: Licence File Number: Company Name: ABN: Trading as: Reporting period: to STATEMENT OF COMPLIANCE WITH LICENCE CONDITIONS 1. Were all conditions of the Licence complied with within the reporting period? (please tick the appropriate box) Yes Please proceed to Section C No Please proceed to Section B Each page must be initialled by the person(s) who signs Section C of this Annual Audit Compliance Report (AACR). Initial: Environmental Protection Act 1986 Page 14 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

104 SECTION B DETAILS OF NON-COMPLIANCE WITH LICENCE CONDITION. Please use a separate page for each Licence condition that was not complied with. a) Licence condition not complied with: b) Date(s) when the non compliance occurred, if applicable: c) Was this non compliance reported to DER?: Yes Reported to DER verbally Date Reported to DER in writing Date No d) Has DER taken, or finalised any action in relation to the non compliance?: e) Summary of particulars of the non compliance, and what was the environmental impact: f) If relevant, the precise location where the non compliance occurred (attach map or diagram): g) Cause of non compliance: h) Action taken, or that will be taken to mitigate any adverse effects of the non compliance: i) Action taken or that will be taken to prevent recurrence of the non compliance: Each page must be initialled by the person(s) who signs Section C of this AACR Initial: Environmental Protection Act 1986 Page 15 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

105 SECTION C SIGNATURE AND CERTIFICATION This Annual Audit Compliance Report (AACR) may only be signed by a person(s) with legal authority to sign it. The ways in which the AACR must be signed and certified, and the people who may sign the statement, are set out below. Please tick the box next to the category that describes how this AACR is being signed. If you are uncertain about who is entitled to sign or which category to tick, please contact the licensing officer for your premises. If the licence holder is An individual A firm or other unincorporated company A corporation A public authority (other than a local government) a local government The Annual Audit Compliance Report must be signed and certified: by the individual licence holder, or by a person approved in writing by the Chief Executive Officer of the Department of Environment Regulation to sign on the licensee's behalf. by the principal executive officer of the licensee; or by a person with authority to sign on the licensee's behalf who is approved in writing by the Chief Executive Officer of the Department of Environment Regulation. by affixing the common seal of the licensee in accordance with the Corporations Act 2001; or by two directors of the licensee; or by a director and a company secretary of the licensee, or if the licensee is a proprietary company that has a sole director who is also the sole company secretary by that director, or by the principal executive officer of the licensee; or by a person with authority to sign on the licensee's behalf who is approved in writing by the Chief Executive Officer of the Department of Environment Regulation. by the principal executive officer of the licensee; or by a person with authority to sign on the licensee's behalf who is approved in writing by the Chief Executive Officer of the Department of Environment Regulation. by the chief executive officer of the licensee; or by affixing the seal of the local government. It is an offence under section 112 of the Environmental Protection Act 1986 for a person to give information on this form that to their knowledge is false or misleading in a material particular. There is a maximum penalty of $50,000 for an individual or body corporate. I/We declare that the information in this annual audit compliance report is correct and not false or misleading in a material particular. SIGNATURE: NAME: (printed) POSITION: DATE: / / SIGNATURE: NAME: (printed) POSITION: DATE: / / SEAL (if signing under seal) Environmental Protection Act 1986 Page 16 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

106 Licence: L8918/2015/1 Licensee: Keysbrook Leucoxene Pty Ltd Form: N1 Date of breach: Notification of detection of the breach of a limit. These pages outline the information that the operator must provide. Units of measurement used in information supplied under Part A and B requirements shall be appropriate to the circumstances of the emission. Where appropriate, a comparison should be made of actual emissions and authorised emission limits. Part A Licence Number Name of operator Location of Premises Time and date of the detection Notification requirements for the breach of a limit Emission point reference/ source Parameter(s) Limit Measured value Date and time of monitoring Measures taken, or intended to be taken, to stop the emission Part B Any more accurate information on the matters for notification under Part A. Measures taken, or intended to be taken, to prevent a recurrence of the incident. Measures taken, or intended to be taken, to rectify, limit or prevent any pollution of the environment which has been or may be caused by the emission. The dates of any previous N1 notifications for the Premises in the preceding 24 months. Name Post Signature on behalf of Keysbrook Leucoxene Pty Ltd Date Environmental Protection Act 1986 Page 17 of 17 Licence: L8918/2015/1 File Number: DER IRLB_TI0672 v2.9

107 Decision Document Environmental Protection Act 1986, Part V Licensee: Licence: Keysbrook Leucoxene Pty Ltd L8918/2015/1 Registered office: Level 2, 100 Royal Street EAST PERTH WA 6004 ACN: Premises address: Keysbrook Mineral Sands Mine 1391 Hopeland Road NORTH DANDALUP WA 6207 Being Lot 1 on Diagram 8916, Lot 6 on Diagram 52395, Lot 52, 59, 62 & 63 on Plan 739, Lots on Diagram and Lot 300 on Diagram Issue date: Thursday, 19 November 2015 Commencement date: Monday, 23 November 2015 Expiry date: Thursday, 29 June 2023 Decision Based on the assessment detailed in this document the Department of Environment Regulation (DER), has decided to issue a licence. DER considers that in reaching this decision, it has taken into account all relevant considerations and that the Licence and its conditions will ensure that an appropriate level of environmental protection is provided. Decision Document prepared by: Daniel Hartnup Licensing Officer Decision Document authorised by: Danielle Eyre Delegated Officer Environmental Protection Act 1986 Page 1 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

108 Contents 1 Purpose of this Document 2 2 Administrative summary 3 3 Executive summary of proposal and assessment 4 4 Decision table 5 5 Advertisement and consultation table 9 6 Risk Assessment 10 Appendix A 11 A1 General conditions Stormwater management 11 A2 Premises operation Containment of processing wastes 13 A2 Premises operation Acid sulfate soils 16 A3 Point source emissions to surface water 18 A4 Emissions to land 20 A5 Fugitive emissions Dust 22 A6 Noise 24 1 Purpose of this Document This decision document explains how DER has assessed and determined the application and provides a record of DER s decision-making process and how relevant factors have been taken into account. Stakeholders should note that this document is limited to DER s assessment and decision making under Part V of the Environmental Protection Act Other approvals may be required for the proposal, and it is the proponent s responsibility to ensure they have all relevant approvals for their Premises. Environmental Protection Act 1986 Page 2 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

109 2 Administrative summary Administrative details Application type Works Approval New Licence Licence amendment Works Approval amendment Activities that cause the premises to become prescribed premises Application verified Application fee paid Works Approval has been complied with Compliance Certificate received Category number(s) 6: Mine dewatering 8: Mineral sands mining or processing Date: 15/09/2015 Date: 17/09/2015 Yes No N/A Yes No N/A Assessed design capacity 150,000 tonnes per annual period 5,250,000 tonnes per annual period Commercial-in-confidence claim Yes No Commercial-in-confidence claim outcome Not applicable. Is the proposal a Major Resource Project? Yes No Was the proposal referred to the Environmental Protection Authority (EPA) under Part IV of the Environmental Protection Act 1986? Yes No Referral decision No: 1580 Managed under Part V Assessed under Part IV Is the proposal subject to Ministerial Conditions? Yes No Ministerial statement No: 810 EPA Report No: Bulletin 1269 Does the proposal involve a discharge of waste into a designated area (as defined in section 57 of the Environmental Protection Act 1986)? Yes No Department of Water consulted Yes No Is the Premises within an Environmental Protection Policy (EPP) Area Yes No The Premises is located within the area defined by the Environmental Protection (Peel Inlet - Harvey Estuary) Policy 1992 (Peel-Harvey EPP) and contains and abuts several wetlands subject to the provisions of the Environmental Protection (Swan Coastal Plain Lakes) Policy 1992 (Swan Coastal Plain Lakes EPP). Is the Premises subject to any EPP requirements? Yes No The Peel-Harvey EPP requires the control and prevention of excessive nutrient export into the drainage system. The Swan Coastal Plain Lakes EPP prohibits the unauthorised mining, filling, draining or effluent discharge into these lakes. Environmental Protection Act 1986 Page 3 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

110 3 Executive summary of proposal and assessment This assessment relates to the Keysbrook Mineral Sands Mine (Keysbrook) (L8918/2015/1). Keysbrook is a medium scale, low grade heavy mineral sands mine located on the Southern Swan Coastal Plain near North Dandalup, approximately 70 km south of Perth. It was recently established under Works Approval W5386/2013/1 and is subject to the requirements of Ministerial Statement 810 of The mine is spread across 1,366 ha of privately owned land with multiple owners on pre-1898 land titles, where the private landowner rather than the State has ownership of the minerals, and the provisions of the Mining Act 1978 do not apply. The site is predominantly cleared farming land however pockets of remnant native vegetation contain habitat for Listed threatened species and communities, and mining may also indirectly impact on wetlands of regional significance. The southern part of the mine is located 0.5 km from the North Dandalup township. There are 46 receptors within a 1.5 km radius of the premises boundary, of which 10 are located within 300 m. With a life-of-mine extending over 8 years, it is possible the number of receptors within proximity to the mining operation may increase during operations. The original proposal was referred to the Environmental Protection Authority (EPA) in 2005, who determined to formally assess the proposal at a level of Public Environmental Review (PER). Following a protracted appeals process, the project received conditional approval in October 2009 subject to Ministerial Statement 810. The proposal was also referred to the State Administrative Tribunal (SAT) in 2010, where planning approval to carry out excavation and processing activities was granted in May 2012, on the provision the mine is established within 8 years. The mining operation will utilise dry mining techniques and wet separation processing. Once overburden is removed, conventional earthmoving equipment will collect and transport ore to a screening unit, from where it will be pumped as a slurry to a Run of Mine (ROM). Titanium minerals will then be separated from clay fines and sand fractions to produce a heavy mineral concentrate (HMC), which is stockpiled and transported 124 km to Doral s Mineral Separation Plant at Picton for further separation into individual constituent mineral products. Sandy tailings material and clay fines will be returned to mine voids as part of the rehabilitation process. The mine will produce up to 120,000 tonnes per annum of HMC at a nominal processing rate of 600 tonnes per hour, with a mineable reserve estimated at 26 million tonnes. The key emissions and discharges from the operations include noise emissions, ambient air quality (fugitive dust), discharge to surface water, disturbance of acid sulfate soils (ASS), and the disposal of waste material from secondary processing containing naturally occurring radioactive materials (NORMs). Noise emissions, ambient air quality and groundwater (including ASS) have been determined to be key environmental factors by the EPA and are regulated through Statement 810; as such this licence does not include conditions relating to these aspects of the proposal. The controlled discharge of dewatering effluent and the disposal of NORM waste have been conditioned in the licence to ensure an acceptable level of environmental protection. Environmental Protection Act 1986 Page 4 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

111 4 Decision table All applications are assessed in line with the Environmental Protection Act 1986, the Environmental Protection Regulations 1987 and DER s Operational Procedure on Assessing Emissions and Discharges from Prescribed Premises. Where other references have been used in making the decision they are detailed in the decision document. DECISION TABLE Works Approval / Licence section General conditions Condition number W = Works App L= Licence L no conditions Justification (including risk description & decision methodology where relevant) Operation Contaminated and potentially contaminated stormwater will be collected and managed as part of the process water circuit. As such no conditions have been added to the licence regarding stormwater control. Reference documents Premises operation L1.3.1 L1.3.4 DER s assessment and decision making are detailed in Appendix A1. Operation Conditions have been included in the licence to: specify the authorised infrastructure on the premises for the containment of processing wastes and the minimum infrastructure requirements; require adequate safeguarding of pipelines carrying slurries of ore and tailings to prevent uncontrolled discharges in the event of an incident or malfunction; and require daily inspections of all containment infrastructures for leaks, integrity and freeboard requirements. Emissions general Point source emissions to air including monitoring L2.1.1 L no conditions DER s assessment and decision making are detailed in Appendix A2. Operation Descriptive limits will be set through conditions of the licence and therefore conditions regarding recording and investigation of exceedances of limits has been included. Operation No significant point source emissions to air are expected or authorised during operation of the mine. No specified conditions relating to point source emissions to air or the monitoring of these emissions have been added to the licence. Environmental Protection Act 1986 Page 5 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

112 DECISION TABLE Works Approval / Licence section Point source emissions to surface water including monitoring Condition number W = Works App L= Licence L2.2.1 L2.2.2 L3.2.1 Justification (including risk description & decision methodology where relevant) Operation The superficial aquifer will require dewatering to allow mining during the winter months. Dewatering effluent will be collected and stored in a sump at the base of the mining area, with excess discharged to the process water dam containing recovered process water, production bore water and harvested stormwater. When capacity of the process water dam is exceeded, surplus water will be discharged via a lined spillway into the nearby Balgobin Brook South tributary. Conditions have been added to the licence to manage this activity. Reference documents Point source emissions to groundwater including monitoring Emissions to land including monitoring L no conditions L2.3.1 L2.3.2 DER s assessment and decision making are detailed in Appendix A3. Operation No significant point source emissions to groundwater are expected or authorised during operation of the mine. No specified conditions relating to point source emissions to groundwater or the monitoring of these emissions have been added to the licence. Operation Tailings will be co-disposed to in-pit tailings storage facilities, to be constructed in mined-out voids as the mine path progresses as part of the rehabilitation of the premises. Tailings will comprise quartzose sands, minor clay and unrecovered heavy mineral, and trash mineral tailings from secondary processing (Picton tails). The Picton tails will comprise concentrated monazite, a naturally occurring radioactive material (NORM), and will be blended with tails from the mine site wet concentrator plant to achieve radiation levels at or below pre-mining levels, prior to disposal. Conditions have been added to the licence to manage this activity, in addition to an improvement condition that requires the submission of an Environmental Radiation Management Plan that considers impact to environmental receptors and public exposure via environmental pathways. Fugitive emissions L no conditions DER s assessment and decision making are detailed in Appendix A4. Operation Ambient air quality (i.e. dust from operations) has been determined to be a key environmental factor in the Part IV assessment, and is regulated under Ministerial Statement 810 (administered by the Office of the Environmental Protection Authority (OEPA)). As such, no specified conditions relating to fugitive emissions or the monitoring of these emissions have been added to the licence. DER s assessment and decision making are detailed in Appendix A5. Environmental Protection Act 1986 Page 6 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

113 DECISION TABLE Works Approval / Licence section Condition number W = Works App L= Licence Justification (including risk description & decision methodology where relevant) Odour L no conditions Operation Odour is not expected from the operation of a mineral sands mine. No specified conditions relating to odour emissions or the monitoring of these emissions have been added to the licence. Noise L no conditions Operation Noise has been determined to be a key environmental factor in the Part IV assessment, and is regulated under Ministerial Statement 810. As such, no specified conditions relating to noise or the monitoring of these emissions have been added to the licence. Monitoring general Monitoring of inputs and outputs Process monitoring Ambient quality monitoring Meteorological monitoring L3.1.1 L3.1.4 L no conditions L3.3.1 L3.4.1 L no conditions Improvements L4.1.1 L4.1.2 DER s assessment and decision making are detailed in Appendix A6. Operation Conditions have been applied to prescribe the minimum monitoring requirements. They relate to the minimum requirements for sampling and analysis of samples, minimum timeframes for sampling frequency, and calibration requirements for instruments used by Licensees. Operation Monitoring of inputs and outputs are not required to adequately manage emissions from the Premises during operation. No specified conditions relating to the monitoring of inputs and outputs have been added to the licence. Operation A condition has been included in the licence to require monthly monitoring of the volume and location of trash mineral tailings from the Picton Mineral Separation Plant disposed on the Premises. This information is required to demonstrate compliance with condition L Operation Table has been included in the licence to require monthly monitoring of ambient surface water quality in Balgobin Brook South tributary, both upstream and downstream of the licensed discharge point W1. Table requires monitoring of groundwater quality across the Premises, to monitor for changes in groundwater quality that may indicate impacts from the disturbance of ASS. Operation Meteorological monitoring is not required to adequately manage emissions from the Premises during operation. No specified conditions relating to meteorological monitoring are required to be added to the licence. Operation IR1 submission of an Environmental Radiation Management Plan (Refer 2.3 Emissions to Land). Reference documents Environmental Protection Act 1986 Page 7 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

114 DECISION TABLE Works Approval / Licence section Information Licence Duration Condition number W = Works App L= Licence L5.1.1 L5.1.4 L5.2.1 L5.2.3 L5.3.1 N/A Justification (including risk description & decision methodology where relevant) Operation Conditions relating to minimum record keeping requirements have been included in the licence. Submission of an annual environmental report including a description of activities undertaken during the reporting period and a summary of all monitoring undertaken, including an appraisal against previous monitoring data, has been included. A notification condition for breaches of licence limits has also been included. The licence duration has been determined in accordance with the DER guidance statement: Licence duration (May 2015), to align with the duration of planning approvals issued by the Western Australian Planning Commission and the Shires of Serpentine-Jarrahdale and Murray (expiry 29 June 2023). Reference documents Guidance Statement: Licence duration (DER, May 2015) Environmental Protection Act 1986 Page 8 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

115 5 Advertisement and consultation table Date Event Comments received/notes How comments were taken into consideration 21/09/2015 Application advertised in West Australian newspaper Nil. N/A. 10/11/2015 Proponent sent a copy of draft instrument Minor corrections requested relating to the volume of ore to be processed and field monitoring requirements. Changes made where necessary. Environmental Protection Act 1986 Page 9 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7

116 6 Risk Assessment Note: This matrix is taken from the DER Corporate Policy Statement No Operational Risk Management Table 1: Emissions Risk Matrix Environmental Protection Act 1986 Page 10 of 25 Decision Document: L8918/2015/1 File Number: DER2015/ IRLB_TI0669 v2.7