WAMBO COAL PTY LIMITED

MONTHLY ENVIRONMENTAL MONITORING REPORT

December 2014

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Table of Contents

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

2.0 METEOROLOGICAL DATA ......................................................................................... 3 2.1. Rainfall ....................................................................................................................... 3 2.2. Wind ........................................................................................................................... 4

3.0 SURFACE WATER SAMPLING ................................................................................... 4 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 ......................................................................................................... 10

8.0 NOISE MONITORING ................................................................................................. 12 8.1. Attended Monitoring ................................................................................................. 12 8.2. Real Time Monitoring ............................................................................................... 12

9.0 REAL-TIME AIR QUALITY MONITORING ................................................................. 12

10.0 COMMUNITY COMPLAINTS ...................................................................................... 14

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Tables

Table 1 - Monthly Surface Water Results – December 2014 .................................................... 4

Table 2 - Ground Water Results – December 2014 .................................................................. 5

Table 3 - Dust Deposition Results – December 2014 ............................................................... 7

Table 4 - HVAS Results – December 2014 ............................................................................... 8

Table 5 - Blasting Criteria Limits .............................................................................................. 10

Table 6 - Blast Results – December 2014 ............................................................................... 11

Table 7 - PM10 Results – December 2014 ............................................................................. 13

Figures

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

Figure 2 - Deposition Dust Gauge Results – December 2014 .................................................. 7

Figure 3 - HVAS YTD Annual Average – December 2014 ........................................................ 9

Figure 4 - 24 Hour Average PM10 Results – December 2014 ................................................. 14

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

Monday 1st December to Wednesday 31st December 2014. 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 148.6mm of rain was received during December. Year to date rainfall

in comparison to 2013 results are shown in Figure 1.

Figure 1 - Monthly and Cumulative Rainfall

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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

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.

December results are detailed below in Table 1.

Table 1 - Monthly Surface Water Results – December 2014

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 7.50 638 10 270 - 28.3 -

SW03 - Wollombi Brook Pump Out 7.20 975 13 481 <2 25.8 -

SW02 - Wollombi Brook Down 7.50 995 6 470 <2 28.4 -

SW40 - Confluence with SWC 7.60 641 4 342 - 27.7 -

NORTH WAMBO CREEK

SW04 - North Wambo Creek Up - - - - - - Dry

SW27a - North Wambo Creek Middle Lower

7.90 394 860 1,090 - 22.8 -

SW32a - North Wambo Creek Pump 7.80 454 2,940 1,050 - - Dry

SW05 - North Wambo Creek Down 7.20 516 266 510 - 22.5 -

SOUTH WAMBO/STONY CREEK

SW06 - South Wambo Creek 7.40 514 17 239 - - -

SW07 - South Wambo/Stony Creek 7.30 394 122 214 - - -

SW08 - Stony Creek - - - - - - Dry

LONGFORD/DOCTOR’S CREEKS

SW43 - Longford Creek Up 7.80 463 235 414 <2 - -

SW44 - Longford Creek Down - - - - - - Dry

SW46 - Doctors Creek Up - - - - - - Dry

SW45 - Doctors Creek Down - - - - - - Dry

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Sample Location pH EC

(µS/cm) TSS

(mg/L) TDS

(mg/L)

Oil & Grease (mg/L)

Temp (oC)

Comments

WATERFALL CREEK

SW39 - Waterfall Creek Midstream 7.50 201 925 605 - - -

MINE WATER DAMS

SW11 - West Cut Dam Pipe Not Pumping -

SW12 - West Cut Dam 9.00 4,120 - - - 24.8 -

SW14 - Box Cut Dam (Admin) 8.30 609 - - - 25.5 -

SW15 - Eagles Nest Dam 8.90 7,220 84.00 4,750 <2 25.9 -

SW20 - Dam Adjacent to West Cut Dam

8.10 740 - - - 23.2 -

SW29 - SCB Dam - - - - - - No Access

SW30 - Turkeys Nest - - - - - - No Access

SW31 - Gordon Below Franklin 9.30 4,570 - - - 24.8

SW37 - Wollemi Sump - - - - - - No longer exists

SW38 - Homestead Open Cut 8.70 6,220 - - - 22.2 -

SW47 - NWU Pumpout Water - - - - - - No longer exists

SW48 - Inpit sample - - - - - - No longer exists

SW49 - Bates Pit Pumpout - - - - - - No access

SW51 - South Dam - - - - - - Decommissioned

SW50 - Hunter River Water Not Pumping -

Note: Figures in bold fall outside trigger levels.

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. Results for December are

detailed below:

Table 2 - Ground Water Results – December 2014

Sample Location pH EC

(S/cm)

Depth to Water (m)

Temp (oC)

Comments

GW02 7.00 494 7.40 19.5 -

GW11 7.10 550 5.61 18.9 -

P106 - - 9.76 - Insufficient water to

sample

P109 6.70 694 5.79 17.4 -

P110 6.40 780 5.55 17.9 -

P111 7.00 720 6.94 18.7 -

P114 6.50 6,640 6.00 19.0 -

P116 7.30 1,486 6.33 19.1 -

P202 6.90 10,520 8.80 18.9 -

P206 7.40 2,150 16.98 19.7 -

P301 6.50 5,360 15.33 19.8 -

P315 6.30 320 7.63 19.4 -

GW12 - - 12.83 - Insufficient water to

sample

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Sample Location pH EC

(S/cm)

Depth to Water (m)

Temp (oC)

Comments

GW13 7.00 3,740 5.51 19.3 -

GW14 - - - - Dry

GW15 6.90 610 11.10 20.5 -

GW16 7.40 824 9.40 18.9 -

GW17 7.00 5,300 11.58 19.6 -

GW18 - - - - Dry

GW19 - - - - Dry

GW20 GW20 is a vibration wire multi-piezometer installation

GW21 - - 36.57 - Insufficient water to

sample

GW22 8.30 6,780 35.74 22.0 -

P1* 6.71 7,420 25.47 - -

P3* - - - - -

P5* - - - - Removed from

monitoring

P6* - - - - -

P11* - - - - Dry

P12* 7.24 868 7.18 - -

P13* 6.28 1,115 7.48 - -

P15* 7.77 6,640 6.69 - -

P16* 7.28 7,510 7.62 - -

P17* 7.42 8,470 9.51 - -

P18* 7.36 7,460 7.66 - -

P20* 7.27 9,150 8.01 - -

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.

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.

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

Page | 7

Table 3 - Dust Deposition Results – December 2014

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* 4.7 1.9 40 2.9 2.0 D03 3.7 2.5 68 3.0 2.1 D07* 10.2 4.4 43 6.0 3.4 D09* 5.3 3.3 62 2.0 1.6

# D11* 22.6 4.0 18 2.5 1.5 # D12 6.7 2.5 37 3.3 2.2 # D17 2.5 1.8 72 1.8 1.1

D19 4.4 2.9 66 3.0 1.8 D20 3.1 2.0 65 1.8 1.3

# D21 2.90 2.10 72 1.9 1.4

# D22 2.5 1.9 76 2.2 1.6 D23 2.0 1.3 65 2.1 1.3

# D24 1.3 1.0 77 1.4 0.9 # D25 3.80 2.80 74 2.8 2.0 D26 2.5 1.5 60 2.1 1.4

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

Figure 2 - Deposition Dust Gauge Results – December 2014

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

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.

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

Table 4 - HVAS Results – December 2014

Date of Run

HV01 - Coralie

TSP (g/m3)

HV02 - Caban

TSP (g/m3)

HV03 - Thelander

TSP (g/m3)

HV04 - Muller

TSP (g/m3)

6/12/2014 46.4 41.6 33.8 40

12/12/2014 77.9 36.9 45.4 65.1

18/12/2014 122 106 95.9 110

24/12/2014 70.6 43.9 41.4 47.8

30/12/2014 99.6 66.5 49.8 55.4 Monthly Mean 83.30 58.98 53.26 63.66 Yearly Mean 66.6 68.1 48.3 62.3

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Figure 3 - HVAS YTD Annual Average – December 2014

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7.0 Blast Events

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

conducted at Wambo. Five 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 December 2014 were within the prescribed criteria

limits. Blast results are presented in Table 6 below.

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Table 6 - Blast Results – December 2014

Date Time Location

Kelly Residence – A0728 Wambo Homestead – A0722 Harris Site – A6006 Muller Residence – A6005

Over Pressure (dB(L))

Vibration (mm/s)

Wave-form

Over Pressure (dB(L))

Vibration (mm/s)

Wave-form

Over Pressure (dB(L))

Vibration (mm/s)

Wave-form

Over Pressure (dB(L))

Vibration (mm/s)

Wave-form

1/12/2014 14:41:01 M21WWA2 107.6 0.18 YES NRR 108.1 0.09 YES 103.4 0.57 YES

11/12/2014 13:12:33 M15WRC5 102 0.25 YES 97.1 0.26 YES 103.5 0.30 YES 108.4 0.21 YES

16/12/2014 15:32:50 BS5WTA3 99.2 0.18 YES 93.1 0.36 YES 106.5 0.23 YES 99.4 0.09 YES

18/12/2014 15:33:15 M15WRCa 101.6 0.06 YES 94 0.26 YES 97.5 0.1 YES 100.3 0.13 YES

23/12/2014 14:34:11 M21WWA3 97.3 0.09 YES NRR 104 0.22 YES 104.3 0.75 YES

Date Time Location

Thelander Residence – A8047

Over Pressure (dB(L))

Vibration (mm/s)

Wave-form

1/12/2014 14:41:01 M21WWA2 106.9 0.58 YES

11/12/2014 13:12:33 M15WRC5 107.5 0.4 YES

16/12/2014 15:32:50 BS5WTA3 98.4 0.13 YES

18/12/2014 15:33:15 M15WRCa 99.8 0.13 YES

23/12/2014 14:34:11 M21WWA3 106.9 1.28 YES

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8.0 Noise Monitoring

8.1. Attended Monitoring

Attended noise monitoring is undertaken on a monthly basis and occurred during the

month of December. Monitoring results 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.

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

All PM10 sites were within the yearly average criteria limits of 30ug/m3. A single

exceedance of the 24hr average criteria of 50ug/m3 for a single day was recorded at

PM01 on the 17th December.

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Table 7 - PM10 Results – December 2014

Date of Run

PM01 (Coralie) PM02 (Wambo Road) PM03 (Thelander) PM04 (Muller)

PM10 24 Hour Result (ug/m

3)

YTD Average

PM10 24 Hour

Result (ug/m

3)

YTD Average

PM10 24 Hour Result (ug/m

3)

YTD Average

PM10 24 Hour Result (ug/m

3)

YTD Average

1/12/2014 12.4 17.5 11.4 19.1 8.7 15.1 10.2 17.6

2/12/2014 18.8 17.5 16.1 19.1 12.0 15.1 18.4 17.6

3/12/2014 19.2 17.5 17.3 19.1 14.2 15.1 22.1 17.6

4/12/2014 14.6 17.5 12.9 19.0 9.1 15.1 10.7 17.6

5/12/2014 12.5 17.5 14.1 19.0 8.9 15.1 9.9 17.6

6/12/2014 11.7 17.4 10.3 19.0 8.5 15.1 9.6 17.6

7/12/2014 11.8 17.4 9.4 19.0 7.2 15.1 10.3 17.5

8/12/2014 17.8 17.4 11.7 18.9 9.2 15.0 12.0 17.5

9/12/2014 31.3 17.5 21.7 19.0 23.2 15.1 21.3 17.5

10/12/2014 30.1 17.5 19.1 19.0 20.2 15.1 20.6 17.5

11/12/2014 7.6 17.5 6.4 18.9 5.6 15.1 4.8 17.5

12/12/2014 20.3 17.5 12.5 18.9 12.8 15.0 16.2 17.5

13/12/2014 24.8 17.5 14.1 18.9 15.8 15.0 15.5 17.5

14/12/2014 24.2 17.5 19.1 18.9 20.2 15.1 26.0 17.5

15/12/2014 32.9 17.6 19.8 18.9 19.5 15.1 28.1 17.5

16/12/2014 25.0 17.6 33.7 18.9 22.0 15.1 29.8 17.6

17/12/2014 50.2 17.7 46.4 19.0 37.9 15.2 35.6 17.6

18/12/2014 37.0 17.7 34.7 19.1 30.8 15.2 31.6 17.7

19/12/2014 33.6 17.8 27.8 19.1 25.8 15.2 25.5 17.7

20/12/2014 21.7 17.8 32.3 19.1 20.5 15.3 23.5 17.7

21/12/2014 23.7 17.8 18.0 19.1 19.2 15.3 24.1 17.7

22/12/2014 26.7 17.8 19.5 19.1 21.3 15.3 28.2 17.8

23/12/2014 20.0 17.8 14.0 19.1 13.2 15.3 14.2 17.7

24/12/2014 21.7 17.9 16.6 19.1 13.9 15.3 16.9 17.7

25/12/2014 11.8 17.8 11.8 19.1 12.1 15.3 13.3 17.7

26/12/2014 25.5 17.9 11.8 19.1 10.0 15.2 11.3 17.7

27/12/2014 27.0 17.9 20.1 19.1 19.7 15.3 19.8 17.7

28/12/2014 16.7 17.9 8.8 19.0 8.8 15.2 9.5 17.7

29/12/2014 17.6 17.9 7.4 19.0 5.7 15.2 6.9 17.7

30/12/2014 39.9 17.9 25.8 19.0 18.4 15.2 19.1 17.7

31/12/2014 46.3 18.0 27.4 19.0 25.8 15.3 27.6 17.7

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.

Page | 14

Figure 4 - 24 Hour Average PM10 Results – December 2014

10.0 Community Complaints

During the reporting period nil complaints were received. Thirty one complaints have

been received year to date, compared to twenty eight during the same reporting period

in 2013.

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

Page | 16

Meteorological Data December 2014

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

01/12/14 18.4 23.6 34.3 19.0 24.0 33.3 -13.8 4.6 23.9 32.0 71.0 95.9 -1.7 205.4 1081.7 2.3 0.0 1.8 6.4

02/12/14 19.3 26.9 36.5 20.1 27.2 35.8 -10.5 4.5 25.7 26.4 59.8 94.2 -1.7 301.8 995.6 7.4 0.0 2.0 6.3

03/12/14 19.7 27.4 38.3 21.0 27.9 38.0 -9.7 6.3 25.3 22.1 60.6 91.8 -1.7 252.3 1053.5 0.2 0.0 2.3 7.5

04/12/14 20.3 24.6 31.1 20.9 25.1 31.1 -4.3 5.5 17.5 47.1 74.5 95.3 -1.7 110.1 553.9 2.6 0.0 2.2 7.8

05/12/14 17.9 25.1 34.8 18.4 25.3 34.4 -12.7 3.0 15.9 27.8 64.3 95.3 -1.7 282.3 1042.6 29.6 0.0 3.2 8.6

06/12/14 17.2 21.0 27.2 18.0 21.4 27.3 -5.9 4.8 12.8 53.8 83.5 95.5 -1.7 128.1 1169.6 14.1 0.1 1.5 7.9

07/12/14 17.7 24.2 34.9 18.6 24.6 34.3 -8.5 4.7 18.2 30.8 72.7 95.6 -1.7 282.0 1049.2 0.2 0.0 1.8 4.7

08/12/14 18.3 24.3 32.2 19.2 24.7 31.9 -12.8 5.9 24.8 41.0 73.1 94.9 -1.7 212.2 1113.1 5.6 0.0 1.6 7.3

09/12/14 20.4 23.7 30.0 21.4 24.0 29.6 -5.9 4.5 18.7 52.7 71.5 88.1 -1.7 244.9 1052.6 0.0 0.1 2.8 7.1

10/12/14 20.2 23.2 32.1 20.7 23.5 31.9 -7.7 4.1 9.6 47.2 76.6 96.1 -1.7 199.5 1078.2 26.6 0.2 2.0 7.9

11/12/14 16.3 20.8 26.0 16.9 21.3 26.2 -3.2 5.3 9.5 63.1 84.6 96.7 -1.8 89.4 711.7 17.1 0.1 2.4 7.9

12/12/14 16.2 19.1 23.3 16.8 19.4 23.2 -2.6 4.3 8.7 44.2 65.6 92.6 -1.8 222.2 1029.4 0.0 1.0 4.0 7.8

13/12/14 14.9 18.9 23.1 16.0 19.3 22.8 -4.3 5.2 24.8 48.2 68.3 88.4 -1.8 198.9 866.0 0.2 0.1 3.3 6.8

14/12/14 12.5 20.6 29.2 13.9 21.1 28.0 -15.1 5.9 24.7 32.2 63.3 95.1 -1.8 349.0 1100.2 0.0 0.0 1.4 4.8

15/12/14 14.3 22.3 29.3 15.3 22.9 29.2 -4.1 7.1 23.8 40.9 63.9 93.8 -1.8 341.6 980.2 0.0 0.0 1.9 5.6

16/12/14 14.1 23.1 30.9 15.2 23.7 31.2 -5.7 7.3 21.2 41.9 64.1 93.7 -1.8 203.7 1111.7 0.0 0.0 2.0 7.1

17/12/14 20.1 25.1 30.6 20.6 25.4 30.6 -6.5 3.8 12.8 36.7 53.1 67.2 -1.7 329.1 953.5 0.0 0.1 4.8 8.3

18/12/14 18.9 23.7 29.8 20.0 24.1 29.5 -9.5 4.9 28.6 32.4 63.4 81.8 -1.7 174.2 872.8 0.0 0.1 1.9 4.9

19/12/14 13.9 21.2 27.1 16.0 22.0 26.8 -7.2 10.3 52.0 34.9 61.3 93.0 -1.8 333.6 1040.4 0.0 0.0 2.9 7.0

20/12/14 16.9 21.1 26.9 17.5 21.4 26.6 -4.7 3.8 12.2 44.6 60.2 75.0 -1.8 245.0 1129.2 0.0 0.5 2.4 7.2

21/12/14 14.3 23.1 32.2 15.7 23.6 31.8 -11.7 6.4 20.3 27.0 62.8 90.9 -1.8 349.3 980.0 0.0 0.1 1.9 6.2

22/12/14 17.4 24.9 33.2 18.4 25.4 33.3 -5.0 6.0 18.6 27.0 64.9 93.5 -1.7 296.8 1054.1 0.0 0.0 2.2 7.4

23/12/14 19.3 23.1 28.5 19.9 23.5 28.4 -9.4 5.4 12.7 56.6 79.2 93.7 -1.7 145.4 1121.4 3.7 0.0 1.2 2.9

24/12/14 20.6 24.4 32.7 21.2 24.8 32.5 -9.5 4.4 13.2 44.7 77.7 96.1 -1.7 233.6 1155.6 7.4 0.0 2.0 7.3

25/12/14 20.1 24.8 35.3 20.6 25.0 35.0 -9.6 2.4 9.0 32.9 76.6 96.0 -1.8 259.9 990.6 28.6 0.0 1.6 7.5

26/12/14 19.0 24.5 34.5 19.4 24.8 34.2 -6.5 3.3 8.2 22.3 71.5 96.6 -1.7 316.3 1029.0 1.1 0.0 2.9 8.4

27/12/14 17.8 19.5 21.0 18.3 19.9 21.4 1.4 5.2 7.7 62.6 70.7 87.7 -1.8 51.7 233.2 0.0 0.9 2.5 5.5

28/12/14 18.1 19.8 22.0 18.6 20.2 22.1 0.1 4.9 9.0 66.7 80.7 87.8 -1.8 106.8 471.7 0.2 0.4 2.1 5.1

29/12/14 18.2 24.5 32.5 18.8 24.8 32.6 -13.3 3.7 35.9 31.1 67.2 95.5 -1.8 290.1 1003.0 1.6 0.0 2.0 5.1

30/12/14 20.1 28.2 35.2 22.3 29.0 35.2 -3.8 9.8 42.8 12.5 38.7 80.4 -1.7 357.7 1008.6 0.0 0.0 3.6 9.4

31/12/14 16.0 22.9 28.3 18.3 23.7 28.1 -5.2 9.8 68.7 28.6 65.4 85.5 -1.8 282.4 1137.7 0.0 0.0 3.0 6.9

MONTH 12.5 23.2 38.3 13.9 23.6 38.0 -15.1 5.4 68.7 12.5 68.1 96.7 -1.8 238.6 1,169.6 148.6 0.0 2.4 9.4

Page | 17

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