WAMBO COAL PTY LIMITED

MONTHLY ENVIRONMENTAL MONITORING REPORT

March 2015

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Table of Contents

1.0 INTRODUCTION ........................................................................................................... 3

2.0 METEOROLOGICAL DATA ......................................................................................... 3 2.1. Rainfall ....................................................................................................................... 3 2.2. Wind ........................................................................................................................... 3

3.0 SURFACE WATER SAMPLING ................................................................................... 3 3.1. Hunter River Salinity Trading Scheme (HRSTS) ....................................................... 5

4.0 GROUNDWATER SAMPLING ..................................................................................... 5

5.0 DEPOSITIONAL DUST SAMPLING ............................................................................. 6

6.0 HIGH VOLUME AIR SAMPLING .................................................................................. 8

7.0 BLAST EVENTS ........................................................................................................... 9

8.0 NOISE MONITORING ................................................................................................. 11 8.1. Attended Monitoring ................................................................................................. 11 8.2. Real Time Monitoring ............................................................................................... 11

9.0 REAL-TIME AIR QUALITY MONITORING ................................................................. 11

10.0 COMMUNITY COMPLAINTS ...................................................................................... 13

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Tables

Table 1 - Monthly Surface Water Results – March 2015 ........................................................... 4

Table 2 - Ground Water Results – March 2015 ......................................................................... 5

Table 3 - Dust Deposition Results – March 2015 ...................................................................... 6

Table 4 - HVAS Results – March 2015...................................................................................... 8

Table 5 - Blasting Criteria Limits ................................................................................................ 9

Table 6 - Blast Results – March 2015 ..................................................................................... 10

Table 7 - PM10 Results – March 2015 .................................................................................... 12

Figures

Figure 1 - Monthly and Cumulative Rainfall............................................................................... 3

Figure 2 - Deposition Dust Gauge Results – March 2015 ......................................................... 7

Figure 3 - HVAS YTD Annual Average – March 2015 .............................................................. 8

Figure 4 - 24 Hour Average PM10 Results – March 2015 ........................................................ 13

Appendix A Meteorological Data

Appendix B Surface Water Graphs

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1.0 Introduction

This report presents environmental monitoring results for the reporting period 1st to

31st March 2015. Monitoring during this period includes meteorological

measurement, surface and ground water sampling, depositional dust sampling, High

Volume Air Sampling, blasting events and PM10 real time air monitoring results.

2.0 Meteorological Data

2.1. Rainfall

Approximately 8.3 mm of rain was received during March. Year to date rainfall in

comparison to 2014 results are shown in Figure 1.

Figure 1 - Monthly and Cumulative Rainfall

2.2. Wind

Results for reporting period are available in Appendix A.

3.0 Surface Water Sampling

Surface water samples are collected in accordance with AS/NZS 5667.4:1998 –

Guidance on sampling from lakes, natural and man-made and AS/NZS

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5667.6:1998 – Guidance on sampling of rivers and streams. All samples

collected were analysed in the field for pH, electrical conductivity (EC) and

temperature. Selected sites were analysed in a NATA* accredited laboratory for total

suspended solids (TSS) and total dissolved solids (TDS).

*National Association of Testing Authorities - NATA is the authority that provides independent assurance of

technical competence.

Historical trend charts for SW15 (Eagles Nest Dam – Discharge Point) and SW01,

SW40 and SW02 (Wollombi Brook Upstream and Downstream locations) are

available in Appendix B.

March results are detailed below in Table 1.

Table 1 - Monthly Surface Water Results – March 2015

Sample Location pH EC

(µS/cm) TSS

(mg/L) TDS

(mg/L)

Oil & Grease (mg/L)

Temp (oC)

Comments

WOLLOMBI BROOK

SW01 - Wollombi Brook Up 7.80 688.00 1.00 344.00 - 21.20

SW03 - Wollombi Brook Pump Out 8.10 720.00 5.00 353.00 <2 21.00

SW02 - Wollombi Brook Down 7.40 706.00 4.00 352.00 <2 20.50

SW40 - Confluence with SWC 8.20 671.00 1.00 329.00 - 21.3

NORTH WAMBO CREEK

SW04 - North Wambo Creek Up Dry

SW27a - North Wambo Creek Middle Dry

SW32a - North Wambo Creek Pump Dry

SW05 - North Wambo Creek Down 7.40 1313.00 12.00 721.00 - 17.90

SOUTH WAMBO/STONY CREEK

SW06 - South Wambo Creek Dry

SW07 - South Wambo/Stony Creek Dry

SW08 - Stony Creek Dry

WATERFALL CREEK

SW39 - Waterfall Creek Midstream Dry

MINE WATER DAMS

SW12 - West Cut Dam 9.10 6530.00 26.80

SW14 - Box Cut Dam (Admin) 8.50 668.00 25.40

SW15 - Eagles Nest Dam 9.20 6260.00 26.70

SW20 - Adjacent to West Cut Dam Dry

SW29 - SCB Dam 8.80 1333.00 24.00

SW30 - Turkeys Nest 9.10 6180.00 26.70

SW31 - Gordon Below Franklin 9.20 5790.00 26.60

SW38 - Homestead Open Cut 8.80 7430.00 24.10

Note: Figures in bold fall outside trigger levels.

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3.1. Hunter River Salinity Trading Scheme (HRSTS)

During the reporting period no water was discharge under the HRSTS.

4.0 Groundwater Sampling

Groundwater results are collected on a bi-monthly basis. No data was collected for

March.

Table 2 - Ground Water Results – March 2015

Sample Location pH EC

(S/cm)

Depth to Water (m)

Temp (oC)

Comments

GW02 - - - - -

GW11 - - - - -

P106 - - - - -

P109 - - - - -

P110 - - - - -

P111 - - - - -

P114 - - - - -

P116 - - - - -

P202 - - - - -

P206 - - - - -

P301 - - - - -

P315 - - - - -

GW12 - - - - -

GW13 - - - - -

GW14 - - - - -

GW15 - - - - -

GW16 - - - - -

GW17 - - - - -

GW18 - - - - -

GW19 - - - - -

GW20 GW20 is a vibration wire multi-piezometer installation

GW21 - - - - -

GW22 - - - - -

P1* - - - - -

P3* - - - - -

P5* - - - - -

P6* - - - - -

P11* - - - - -

P12* - - - - -

P13* - - - - -

P15* - - - - -

P16* - - - - -

P17* - - - - -

P18* - - - - -

P20* - - - - -

Note: All depths measured to top of casing, except United bores which are to ground. Figures in bold are outside trigger levels listed in Table 5 of the Ground Water Monitoring Programme (GWMP), which is part of the Site Water Management Plan. * Represents data that is provided on a quarterly basis. The results are to be updated once available.

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5.0 Depositional Dust Sampling

Fifteen depositional dust gauges were collected for the reporting period. Sampling

and analysis is conducted in accordance with AS 3580.10.1 – 1991 – Determination

of particulates – Deposited matter – Gravimetric method. All gauges were

analysed for insoluble solids (IS) and ash residue (AS). Field observations include

water quantity and quality, and any visible contaminants in the sample.

Insoluble solid results are reported on the annual average of 4g/m2/month of all

uncontaminated results which are not located on Wambo Coal owned land. No

depositional dust gauge locations were outside the prescribed criteria level for the

reporting period.

March results are presented in Table 3 and Figure 2 below.

Table 3 - Dust Deposition Results – March 2015

Site Insoluble Solids (IS) (g/m

2.month)

Ash Residue (AR) (g/m

2.month)

IS:AR Ratio

IS YTD Average (g/m

2.month)

AR YTD Average

(g/m2.month)

D01* 6.0 3.0 50 N/A N/A D03 3.0 1.9 63 3.0 1.9 D07* 10.4 5.3 51 2.8 2.0

D09 4.6 2.9 63 5.8 2.7

#D11 3.7 2.3 62 3.1 2.1

#D12* 5.6 2.3 41 3.5 2.3

#D17* 5.3 2.1 40 N/A N/A D19 4.7 2.9 62 4.8 2.9 D20 2.0 1.3 65 1.4 0.9 #D21 2.80 1.90 68 2.5 1.6 #D22 1.8 1.4 78 1.9 1.4

D23 1.7 1.3 76 1.5 1.1

#D24 1.2 0.7 58 0.8 0.5

#D25 3.20 2.40 75 2.9 2.2

D26 3.3 2.1 64 2.6 1.7

Note: Results in bold are YTD average above 4g/m

2/month

Results # are dust gauges not on WCPL owned land. DD gauges on Wambo Coal land and above criteria level are not considered non-compliance. * Contaminated sample

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Figure 2 - Deposition Dust Gauge Results – March 2015

Note: * Monthly sample contaminated by bird droppings, vegetation, insects. # Depositional dust gauges not located on WCPL owned land. Results above criteria at these locations are considered non-compliances.

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6.0 High Volume Air Sampling

Four High Volume Air Samplers (HVAS) operate at locations surrounding Wambo.

All units sampled Total Suspended Particulates (TSP) over a 24-hour period on a six

day cycle, in accordance with AS 2724.3 – 1984 – Determination of total

suspended particulates (TSP) – High volume sampler gravimetric method.

Reported yearly means for locations are within the reporting criteria of 90g/m3.

March results are presented in Table 4 and Figure 3 below.

Table 4 - HVAS Results – March 2015

Date of Run

HV01 - Coralie

TSP (g/m3)

HV02 - Caban

TSP (g/m3)

HV03 - Thelander

TSP (g/m3)

HV04 - Muller

TSP (g/m3)

6/03/2015 99 110 65.7 145

12/03/2015 77.6 68.8 73.1 92.9

18/03/2015 111 126 61.2 117

24/03/2015 48.8 39.6 34.7 109

30/03/2015 64.5 50.1 68.1 120

Monthly Mean 80.2 70.9 50.1 78.9

Yearly Mean 70.9 50.1 78.9 58.0

Figure 3 - HVAS YTD Annual Average – March 2015

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7.0 Blast Events

Four monitoring sites measure ground vibration and air blast overpressure for blasts

conducted at Wambo. Six blasts were conducted during the reporting period.

Monitoring at all four sites is conducted under the blast monitoring requirements set

out in the Wambo EPA licence (EPL 529) and DA 305-7-2003. The blasting criteria

are summarised in Table 5 below.

Table 5 - Blasting Criteria Limits

Airblast Overpressure (dB(L)) Allowable exceedance

115 5% of the total number of blasts over a period of 12 months

120 0%

Ground Vibration (mm/s) Allowable exceedance

5 5% of the total number of blasts over a period of 12 months

10 0%

All measured blast events for March 2015 were within the prescribed criteria limits.

Blast results are presented in Table 6 below.

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Table 6 - Blast Results – March 2015

Peabody Wambo Blasting Results

2015

Homestead (BM01) Kelly (BM02) Muller (BM05) Harris (BM03) Thelander (BM07)

Blast Number

Date Time Blast ID Overpressure

dB(L) Vibration (mm/sec)

Overpressure dB(L)

Vibration (mm/sec)

Overpressure dB(L)

Vibration (mm/sec)

Overpressure dB(L)

Vibration (mm/sec)

Overpressure dB(L)

Vibration (mm/sec)

1 4/03/2015 14:34:10 M18WRA4 98.9 0.14 97.8 0.11 105.9 0.39 101.2 0.14 108.7 0.44

2 9/03/2015 11:09:56 M17WMA2 104.9 0.2 109.3 0.27 107.2 0.74 103.2 0.16 99.1 0.78

3 11/03/2015 14:32:11 BS5WTA4 107.9 0.56 104.4 0.13 98.3 0.09 102.4 0.22 96.8 0.15

4 18/03/2015 14:35:19 M22WWA4 108.5 0.18 NRR* <0.48 107.6 1.37 111.6 0.13 104.4 1.44

5 24/03/2015 14:42:22 M24WWA2 106.2 0.14 107.8 0.13 105.1 1.12 108.1 0.1 107.5 0.93

6 27/03/2015 11:05:31 M20WRA1 94.7 0.1 NRR* <0.48 98.3 0.35 100.1 0.06 96.8 0.5

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8.0 Noise Monitoring

8.1. Attended Monitoring

Attended noise monitoring is undertaken on a monthly basis and can be found on the

Peabody Wambo website at www.peabodyenergy.com/content/404/Australia-Mining-

New/New-South-Wales/Wambo-Mine.

8.2. Real Time Monitoring

Real time noise monitoring results are reported in a quarterly format and can be found

on the Peabody Wambo website at www.peabodyenergy.com/content/404/Australia-

Mining-New/New-South-Wales/Wambo-Mine.

9.0 Real-Time Air Quality Monitoring

Four real time Tapered Element Oscillating Microbalance (TEOM) units were in

operation during the reporting period. The sites are located at Coralie (PM01), the

Caban residence (PM02), Thelander residence (PM03) and the Muller residence

(PM04). These units measure particulate matter less than 10 microns in diameter

(PM10) on a continuous basis and provide a 24 hour average result. These units

operated and sampled in accordance with AS 3580.9.8 - 2002, Method for Sampling

and Analysis of Ambient Air - Determination of Suspended Particulate Matter -

PM10 Continuous Direct Mass Method using a Tapered Element Oscillating

Microbalance Analyser.

March results are presented in Table 7 and Figure 4 below.

All PM10 sites were within the yearly and 24hr average criteria average criteria limits of

30ug/m3 and 50ug/m3 respectively.

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Table 7 - PM10 Results – March 2015

Wambo Coal Dust Monitoring Program

Particulate Matter (10 Micron) Monitoring Data

2015

Date of Run

PM01 - Coralie (Sentinex 19)

PM02 - Wambo Road (Caban) (Sentinex 20)

PM03 - Thelander (Sentinex 21)

PM04 - Muller (Sentinex 22)

PM10 24

Hour Result

(ug/m3)

YTD Average

PM10 24

Hour Result

(ug/m3)

YTD Average

PM10 24

Hour Result

(ug/m3)

YTD Average

PM10 24

Hour Result

(ug/m3)

YTD Average

1/03/2015 15.0 17.8 19.6 14.3 11.6 14.4 17.9 18.4

2/03/2015 37.6 18.2 21.3 14.5 22.3 14.5 24.1 18.5

3/03/2015 29.3 18.4 22.3 14.6 20.3 14.6 29.0 18.7

4/03/2015 38.2 18.7 26.1 14.8 23.9 14.7 28.7 18.8

5/03/2015 33.8 18.9 25.8 14.9 20.8 14.8 30.2 19.0

6/03/2015 32.8 19.1 26.7 15.1 20.0 14.9 32.2 19.2

7/03/2015 41.1 19.5 28.2 15.3 31.4 15.2 35.6 19.5

8/03/2015 29.7 19.6 30.3 15.5 25.0 15.3 35.7 19.7

9/03/2015 44.3 20.0 33.3 15.8 30.7 15.5 40.3 20.0

10/03/2015 36.5 20.2 36.5 16.1 35.3 15.8 49.5 20.4

11/03/2015 27.1 20.3 35.3 16.4 27.7 16.0 43.7 20.8

12/03/2015 30.6 20.5 27.8 16.5 27.7 16.2 31.9 20.9

13/03/2015 14.7 20.4 10.3 16.4 13.5 16.1 19.2 20.9

14/03/2015 17.5 20.4 11.6 16.4 14.3 16.1 22.3 20.9

15/03/2015 24.2 20.4 17.7 16.4 25.0 16.2 43.2 21.2

16/03/2015 25.8 20.5 16.9 16.4 21.8 16.3 24.5 21.3

17/03/2015 27.5 20.6 21.4 16.5 20.8 16.3 38.9 21.5

18/03/2015 31.9 20.7 38.6 16.8 21.1 16.4 28.8 21.6

19/03/2015 40.2 21.0 27.5 16.9 26.4 16.5 39.7 21.8

20/03/2015 30.2 21.1 26.7 17.0 30.8 16.7 38.0 22.0

21/03/2015 23.4 21.1 15.0 17.0 16.8 16.7 21.6 22.0

22/03/2015 17.6 21.1 13.2 16.9 16.5 16.7 18.3 22.0

23/03/2015 14.3 21.0 15.6 16.9 9.7 16.6 40.7 22.2

24/03/2015 16.7 20.9 15.1 16.9 12.8 16.6 27.3 22.3

25/03/2015 15.4 20.9 16.5 16.9 11.7 16.5 19.0 22.2

26/03/2015 19.8 20.9 16.9 16.9 9.4 16.4 20.1 22.2

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27/03/2015 19.3 20.8 26.0 17.0 15.5 16.4 24.8 22.2

28/03/2015 31.7 21.0 18.9 17.0 18.9 16.5 24.4 22.3

29/03/2015 23.2 21.0 21.0 17.1 20.4 16.5 34.3 22.4

30/03/2015 21.7 21.0 18.4 17.1 19.3 16.5 30.2 22.5

31/03/2015 13.0 20.9 8.7 17.0 10.5 16.5 17.3 22.4

Note: Results in red are greater that the 24hr period guidelines of 50ug/m

3

Results in bold are between 30ug/m3 and 50ug/m

3

NRR – No Result Recorded as monitor offline.

Figure 4 - 24 Hour Average PM10 Results – March 2015

10.0 Community Complaints

During the reporting period one complaint were received. One complaint has been

received year to date, compared to four during the same reporting period in 2014.

Details of the community complaints are available on the Peabody Wambo website at

www.peabodyenergy.com/content/422/Australia-Mining/New-South-Wales/Wambo-

Mine/Approvals-Plans-and-Reports-Wambo-Mine.

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Appendix A

Wambo Weather Station

Meteorological Data

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Meteorological Data March 2015

Date

Temperature (2m) Temperature (10m) Temperature Inversion Humidity Solar Radiation Rain Wind Speed

Min Avg Max Min Avg Max Min Avg Max Min Avg Max Min Avg Max mm Min Avg Max

01/03/15 17.7 25.1 37.0 18.6 25.7 36.7 -7.5 7.1 21.0 29.4 72.2 96.5 53.1 334.4 474.5 1.4 0.0 2.5 10.0

02/03/15 16.4 21.2 23.6 17.7 21.6 23.5 -7.2 5.6 20.8 58.7 65.8 84.0 50.5 316.0 459.2 0.0 0.5 2.6 4.8

03/03/15 12.8 22.7 34.0 14.2 23.2 33.5 -10.5 6.9 23.7 35.6 68.4 95.8 -1.4 347.2 882.5 0.0 0.0 1.3 5.4

04/03/15 21.9 26.2 35.9 22.6 26.7 35.6 -10.7 5.4 17.1 34.5 67.4 85.6 -1.5 212.0 914.4 0.0 0.1 1.9 6.7

05/03/15 19.3 24.3 32.5 20.0 24.8 32.3 -7.7 7.0 25.6 15.9 57.5 96.1 -1.5 287.4 936.9 0.0 0.0 2.7 8.4

06/03/15 12.7 21.9 31.6 14.2 22.5 31.4 -10.8 7.8 30.8 16.5 47.5 91.9 -1.5 339.6 910.1 0.0 0.0 2.2 6.2

07/03/15 11.5 21.3 30.4 12.9 22.2 30.0 -8.2 10.4 46.8 32.2 61.7 86.9 101.4 320.0 489.0 0.0 0.0 1.5 4.9

08/03/15 16.8 23.2 33.3 17.9 23.8 33.1 -9.5 8.1 23.0 26.0 71.9 95.1 -0.8 281.6 432.7 0.0 0.0 1.5 5.8

09/03/15 17.1 25.1 34.4 18.4 25.9 34.1 -11.6 9.2 28.5 27.5 65.0 95.8 26.3 310.6 447.6 0.0 0.0 1.3 6.0

10/03/15 18.4 23.7 28.8 20.7 24.4 28.8 -6.2 8.6 35.2 52.7 68.4 85.8 -0.9 282.4 410.6 0.0 0.3 2.4 5.3

11/03/15 20.4 25.1 32.8 21.0 25.5 32.7 -7.3 4.5 15.7 38.1 68.0 88.6 123.7 327.4 456.0 0.0 0.0 1.8 7.3

12/03/15 18.9 24.3 31.5 20.1 24.7 31.0 -6.2 5.9 19.6 41.8 69.3 89.5 94.5 335.7 457.4 0.0 0.0 2.1 5.9

13/03/15 17.6 20.1 22.6 18.3 20.5 23.0 -7.0 5.2 12.1 64.9 81.3 92.3 106.2 374.8 470.2 1.1 0.5 2.2 4.6

14/03/15 14.1 19.9 26.8 15.7 20.5 26.5 -12.4 7.2 21.7 36.9 67.7 93.5 94.0 333.9 474.6 0.0 0.1 1.4 3.6

15/03/15 11.3 18.8 26.7 12.4 19.3 25.9 -12.8 6.5 26.6 47.1 72.6 96.3 21.1 320.3 474.6 0.0 0.0 2.2 7.3

16/03/15 13.4 19.5 25.6 15.0 20.0 25.1 -10.6 6.6 25.1 34.0 60.9 91.6 58.4 323.3 953.7 0.0 0.0 2.1 5.9

17/03/15 9.5 19.0 26.1 10.8 19.7 26.3 -8.9 9.7 31.5 42.3 68.7 95.2 17.0 307.4 444.6 0.0 0.0 0.9 3.3

18/03/15 15.9 25.0 35.9 16.8 25.6 35.7 -8.8 7.4 25.8 30.5 64.8 93.1 15.9 296.9 416.7 0.0 0.0 2.5 8.7

19/03/15 15.3 24.7 35.1 16.8 25.7 34.9 -9.4 12.0 42.0 21.5 64.6 95.9 63.5 323.1 463.7 0.0 0.0 0.9 4.5

20/03/15 14.1 24.5 38.9 15.2 25.2 39.2 -17.8 8.5 30.1 16.8 65.8 96.6 -1.2 274.5 865.8 0.0 0.0 2.2 8.7

21/03/15 18.2 20.2 22.8 18.9 20.6 23.0 -2.9 4.8 8.6 55.9 74.2 91.6 -1.2 52.7 319.5 0.4 1.1 2.8 6.7

22/03/15 18.6 21.5 26.7 19.4 21.8 26.1 -10.9 3.9 10.9 53.5 74.4 94.1 -1.2 170.2 1011.7 1.9 0.4 2.9 6.6

23/03/15 14.7 22.3 31.8 16.0 22.9 31.4 -10.9 7.6 23.0 34.9 71.4 96.7 -1.3 231.8 850.5 0.0 0.0 1.1 3.3

24/03/15 14.8 22.5 33.8 15.9 23.2 33.4 -6.3 9.6 26.9 34.6 80.0 96.4 -1.3 136.1 881.4 2.5 0.0 1.8 7.0

25/03/15 13.3 20.6 27.0 15.9 21.4 26.8 -7.0 9.9 38.4 32.9 65.1 91.3 -1.3 235.5 934.5 0.0 0.0 1.9 6.2

26/03/15 14.9 21.4 29.4 16.5 22.3 29.3 -9.2 10.9 50.5 19.5 58.0 94.8 -1.3 240.7 818.9 0.0 0.0 2.3 6.3

27/03/15 6.0 18.9 29.0 7.9 19.9 28.4 -11.8 12.9 64.8 16.4 39.8 86.2 -2.7 251.2 850.9 0.0 0.0 2.0 5.2

28/03/15 6.3 17.0 26.2 8.1 18.2 25.8 -11.9 14.8 65.2 30.2 60.8 92.5 -2.4 238.8 821.6 0.0 0.0 1.5 6.0

29/03/15 13.6 20.7 30.2 14.6 21.2 30.0 -15.5 6.4 22.3 22.6 65.6 89.0 -1.3 220.0 874.1 0.0 0.0 1.1 6.2

30/03/15 18.1 20.8 24.9 18.7 21.3 24.8 -4.5 7.0 17.3 52.2 77.6 93.3 -1.3 72.1 420.7 0.2 0.0 1.5 4.8

31/03/15 17.1 19.7 23.7 17.9 20.2 23.3 -7.0 5.5 13.6 62.1 81.3 93.8 -1.3 93.6 985.8 0.9 0.0 2.0 5.6

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Appendix B

Surface Water Graphs

SW 15 – Eagles Nest Dam (EPL Discharge Point)

Page | 18

SW 01 – Wollombi Brook Upstream (U/S) near Bulga Township

SW 40 – Wollombi Brook Upstream (U/S) of South Wambo Creek

SW 02 – Wollombi Brook Downstream (D/S) near Warkworth Village