Quarterly Environment Report · 2 EXECUTIVE SUMMARY This Quarterly Environment Report (QER) for the Angas Zinc Mine (AZM) summarises the results of the environmental monitoring program

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Quarter 4: 2016

Environment and Community

Terramin Australia Ltd

October - December: 2016

Quarterly Environment Report

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EXECUTIVE SUMMARY

This Quarterly Environment Report (QER) for the Angas Zinc Mine (AZM) summarises the results of the

environmental monitoring program between October and December 2016, undertaken as part of the Mine’s

Programme for Environmental Protection and Rehabilitation (PEPR).

Terramin Australia Ltd ceased mining operations at AZM on September 30th

, 2013, with the site placed into a

Care and Maintenance phase.

This QER reflects the environmental monitoring requirements outlined in the Mine Care and Maintenance Plan

(MCMP), which has been approved by the Department for State Development (DSD) on the 23rd

March 2015.

Whilst the reduced level of the TSF decant pond surface is no longer a compliance limit, the level was surveyed

at 68.56m RL, as of the 24th

December. The surface area of the TSF decant pond was surveyed at 13,952m2 on

the 24th

December an in compliance. During December, the site experienced an unseasonal amount of rainfall

(93.7mm vs average of 25.6mm) this resulted in an increase in the water surface area. Additional pumps were

switched on to expand the sprinkler system and increase evaporation capacity. The surface area reduced

within seven days to under 15,000m2, as outlined by the outcome and measurable criteria tables. Overall,

2016 has been the wettest year, as well as the wettest December on record in Strathalbyn since 1992,

receiving 76.9mm over the month (BOM, 2017).

There are no non-compliances against Lease Condition Outcomes for Quarter 4, 2016.

During the quarter the DSD, EPA and DEWNR reviewed the closure Outcome Measureable Criteria tables and

provided feedback for finalisation of the Angas Mine Closure Plan. The company undertook the final drafting,

editing and internal management review of the document and incorporated it into the approved Program for

Environmental Protection and Rehabilitation (PEPR).

DSD regulators Kyle Rice, Antonia Scrase and Assessment Officer Paul Thompson conducted a quarterly

compliance visit on 24th

November and observed the site to be compliant. An SCCC meeting was held on

Thursday, 24th

November at Angas Zinc Mine and reported on the site’s compliance over quarter 3. This

feedback was incorporated into a review for the extension of ML6229 requested by Terramin in May 2016

prior to the original term expiring.

The Terramin management review of the Angas Zinc Mine Closure Plan has been completed and was

submitted to the DSD for review on 20th

January 2017.

Cover photo: Western Paddock SEB vegetation with Lignum in the foreground

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TABLE OF CONTENTS

Executive Summary ................................................................................................................................................ 2

Background ............................................................................................................................................................. 5

1. Mining and Mine Void Acid and Metalliferous Drainage ................................................................................ 5

2. Surface Water ................................................................................................................................................. 6

3. Groundwater .................................................................................................................................................. 7

4. Noise ............................................................................................................................................................... 8

5. Public Health and Nuisance ............................................................................................................................ 8

High Volume Sampler – Compliance Criteria ..................................................................................................... 8

Dust Deposition Gauges – Leading Indicator Criteria......................................................................................... 9

Total Insoluble Matter .................................................................................................................................... 9

Lead .............................................................................................................................................................. 10

6. Waste Disposal and Hazardous Substances ................................................................................................. 12

7. TSF Water / Acid Mine Drainage .................................................................................................................. 12

TSF Decant Pond Reduced Level ...................................................................................................................... 12

TSF Seepage Drain Flows .................................................................................................................................. 12

TSF Surface Area .............................................................................................................................................. 12

TSF Groundwater Monitoring Bores ................................................................................................................ 13

TSF PAF testwork results .................................................................................................................................. 14

8. Community Engagement .............................................................................................................................. 16

Strathalbyn Community Consultation Committee (SCCC) ............................................................................... 16

Complaints Register ......................................................................................................................................... 16

9. Miscellaneous News ..................................................................................................................................... 16

10. Summary.................................................................................................................................................. 16

11. References ............................................................................................................................................... 17

12. Appendix A – Angas Zinc Mine – Filled and unfilled voids ...................................................................... 18

13. Appendix B – Water Monitoring Locations ............................................................................................. 19

14. Appendix C – Surface Water Monitoring Data ........................................................................................ 20

15. Appendix D – Groundwater Monitoring Data ......................................................................................... 21

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Groundwater Quality Raw Data ....................................................................................................................... 21

Groundwater Quality Graphs ........................................................................................................................... 22

16. Appendix E – Groundwater Standing Water Levels ................................................................................. 25

17. Appendix F – Dust Monitoring Locations ................................................................................................ 26

18. Appendix G – Dust Leading Indicator Data – Dust Deposition Gauges ................................................... 27

Total Insoluble Matter...................................................................................................................................... 27

Offsite Lead Measurements ............................................................................................................................. 28

Onsite Lead Measurements ............................................................................................................................. 29

19. Appendix H – Compliance Criteria – HiVol .............................................................................................. 31

Total SolId Particulate Measurements ............................................................................................................. 31

PM10 measurements ....................................................................................................................................... 32

Lead measurements ......................................................................................................................................... 32

20. Appendix I – TSF ...................................................................................................................................... 34

Decant Pond reduced level throughout Care and Maintenance ..................................................................... 34

Seepage Drain Flows ........................................................................................................................................ 35

21. Appendix J – TSF Monitoring Bores ......................................................................................................... 36

22. Appendix K – TSF Seepage Drains ............................................................................................................ 40

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BACKGROUND

This is the final QER for 2016 and represents the period from October to December 2016 (Quarter 4). This

report is prepared for the Strathalbyn Community Consultative Committee (SCCC), the Department of State

Development (DSD) and the Terramin Board of Directors. This document reports on Terramin’s status against

the measurable criteria outlined in the approved Mine Care and Maintenance Plan (23rd

March 2015)

submitted as an addendum to the PEPR in July 2014.

1. MINING AND MINE VOID ACID AND METALLIFEROUS DRAINAGE

Production ceased at the Angas Zinc Mine (AZM) on the 30th

of September 2013.

As part of the ongoing Acid and Metalliferous Drainage management strategy the mine void has been allowed

to refill with groundwater seep. In order to speed up the process of filling the void and mitigate potential

oxidisation, additional water, sourced from onsite bores was pumped into the mine void.

During this time the water has been monitored for level and pH. The water level of the mine void measured

61.3m AHD on the 24th

December 2016. An increased from 59.57m AHD on the 27th

September 2016.

Figure 1 Mine Void Recharge against STEDS wells (LG1/LG2), DH2 and PF140

The STEDS wetland is currently full, locally recharging the tertiary aquifer and providing a potential pressure

difference of approximately 7.5 metres, between the wetland and the mine void pond, thus water is still being

drawn towards the mine void. Water has been detected in the screened levels of the STEDS wetland bores LG1

and LG2 for the first time since June 2009. Water levels in LG1 and LG2 will be added to the level monitoring

programme and used to monitor the groundwater conditions. Monitoring water levels of bores both near the

mine void, DH2, DH3 and the Pastefill line (which targets the 140m RL decline void), as well as the regional

groundwater bores continues.

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50

52

54

56

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62

64

66

68

70

m A

HD

Rainfall DH2 PF140 Mine Void LG1 - Tertiary LG2 - Cambrian

LG1/LG2 Water

Level

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Figure 2 Matt Daniel dipping the water level of LG1 and LG2 in the STEDS wetland

2. SURFACE WATER

Surface water sampling was undertaken at Hogben and Croser in October 2016. Statistical paired t-testing for

means revealed no significant difference between upstream (Hogben) and downstream (Croser).

Table 1: Surface water assay results and t-test values

Site Units Croser 1

Croser 2

Croser 3

Mean Croser

Hogben 1

Hogben 2

Hogben 3

Mean Hogben p-value t-value

pH pH 8.09 7.87 7.98 7.98 7.83 8.02 8.02 7.95666

7 0.867 4.303

EC us/c

m 1530 1460 1430 1473.33

3 1350 1350 1350 1350 0.053 4.303

TDS mg/L 853 810 827 830 786 791 813 796.666

7 0.187 4.303

Turbidity NTU 8 8 7 7

Under detection limits

SO4-D mg/L 51 43 43 45.6666

7 43 41 43 42.3333

3 0.300 4.303

As-T mg/L 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 Under detection

limits

Cd-T mg/L 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 Under detection

limits

Cu-T mg/L 0.002 0.002 0.002 0.002 0.011 0.002 0.002 0.005 0.423 4.303

Pb-T mg/L 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 Under detection

limits

Mn-T mg/L 0.028 0.028 0.028 0.028 0.023 0.025 0.026 0.02466

7 0.063 4.303

Se-T mg/L 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 Under detection

limits

Zn-T mg/L 0.005 0.005 0.009 0.00633

3 0.005 0.006 0.005 0.00533

3 0.580 4.303

Fe-T mg/L 0.57 0.6 0.59 0.58666

7 0.52 0.56 0.6 0.56 0.287 4.303

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Site Units Croser 1

Croser 2

Croser 3

Mean Croser

Hogben 1

Hogben 2

Hogben 3


NOX-N mg/L 0.04 0.04 0.04 0.04 0.04 0.05 0.05 0.04666

7 0.184 4.303

TKN-N mg/L 0.8 0.9 0.6 0.76666

7 0.8 0.7 0.8 0.76666

7 1.000 4.303

N-T mg/L 0.8 0.9 0.6 0.76666

7 0.8 0.8 0.8 0.8 0.742 4.303

P-T mg/L 0.06 0.09 0.15 0.1 0.07 0.07 0.07 0.07 0.374 4.303

3. GROUNDWATER

The environmental monitoring plan outlined in the Care and Maintenance Plan for Angas Zinc Mine requires,

where access is possible, quarterly monitoring of RG1, RG2, RG3, RG4, RG5, RG7 and RG8. The weekly water

level monitoring of DH2 for three months after water has been detected in the well has been completed,

however, regular monitoring of DH2, DH3 and the 140 RL Pastefill line has continued throughout the quarter.

RG1, RG4 and RG8 did not exceed the drawdown beyond a one-metre band of 2006 levels, which is shown in

Figure 3, Figure 4 and Figure 5 below. Water levels in RGs 1, 4 and 8 in October have all risen, in response to

the rainfall received throughout the catchment during the preceding quarter (see graph against rainfall in

Appendix E). Regional groundwater recharge has occurred in the district, with a nearby private bore also

recording an increase in recharge compared to previous years (SWL of 68.33m AHD in March 2016 to 68.87m

AHD in January 2017, an increase of 0.54m over the year.

Water quality measurements undertaken in October for the quarter demonstrate a continuity of the patterns

of most parameters from previous quarters in RG1, RG4 and RG8, and are all significantly within leading

indicator limits and thus also PEPR compliance limits.

Land access was not available for RG2 and RG3. RGs 5 and 7 remain dry.

Figure 3 Standing Water Level for RG1

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4

6

8

10

12

Jan-16 Apr-16 Jul-16 Oct-16

Me

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s b

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w g

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RG1 Baseline SWL Criteria

Under detection limits

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4. NOISE

As outlined in the Care and Maintenance addendum to the PEPR (approved March 2015), noise monitoring has

ceased through the Care and Maintenance phase. There were no noise related complaints received

throughout the quarter.

5. PUBLIC HEALTH AND NUISANCE

The HVS measures lead, TSP and PM10 levels over a 24 hour period every three days. In addition to the HVS,

twelve Dust Deposition Gauges (DDGs) remain installed both onsite and offsite and sampled monthly for Total

Insoluble Matter (TIM) and lead. Locations of all dust monitors can be seen in Appendix F.

Compliance criteria remains as per the PEPR criteria. Leading indicators require an investigation as to the

source of the dust and remain as per the PEPR requirements.

Throughout the quarter there has been no public health or nuisance PEPR non-compliances (Appendix H).

HIGH VOLUME SAMPLER – COMPLIANCE CRITERIA

26.5

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27.5

28

28.5

29

29.5

Jan-16 Apr-16 Jul-16 Oct-16M

etr

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Jan-16 Apr-16 Jul-16 Oct-16

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Throughout the quarter there has been no instance of particulate lead, PM10 or TSP levels above the PEPR

compliance criteria (Appendix H).

DUST DEPOSITION GAUGES – LEADING INDICATOR CRITERIA

Acknowledging that the dust deposition gauges are not a compliance measure, results are reported for

completeness.

TOTAL INSOLUBLE MATTER

Throughout the quarter there were 9 instances of Total Insoluble Matter (TIM) exceeding the leading indicator

criteria. 6 of these instances are located alongside paddocks which have been harvested in the recent season

(DDGs 3, 12, 10 and 9), with November being a particularly busy month for agricultural activities.

During the quarter, earthworks in neighbouring properties to the east & south of the ML provided additional

potential dust sources, which is the likely cause of DDG 7 data in October.

With no active mining activities onsite through the quarter, it is likely these TIM increases are linked to

neighbouring agricultural and landfill activities on neighbouring properties surrounding the ML.

Average wind direction was 226 degrees at 15km/hr for October, 207 degrees at 13km/hr for November and

194 degrees at 12km/hr in December. Of the ten wettest days during the quarter included six of the windiest

days on average. See Figure 6.

All DDG dust data is located in Appendix G.

Table 2 Rainfall and wind speed/direction for windiest AZM days

Date Average of Degrees Average of km/hr Rainfall - mm

28/12/2016 227.5521 17.86125 64.43

27/12/2016 87.70833 9.94125 14.59

3/10/2016 282.0625 25.9875 11.46

21/10/2016 225.8958 16.5 10.5

11/11/2016 187.875 8.59875 9

4/10/2016 267.3646 23.38125 8.11

30/10/2016 265.5833 25.26 5.91

2/10/2016 270.1875 24.64875 5.06

9/10/2016 206.8854 22.59375 4.94

8/12/2016 237.5417 25.665 4.56

Table 3 Wind speed/direction and rainfall averages for Q3

Month Average of wind degrees Average wind speed of km/hr Sum of Rainfall - mm

October 225.8040995 15.12689516 62.81

November 207.2881615 12.72454605 17.36

December 194.281922 11.73931818 93.73

Total 209.1446904 13.17093225 173.9

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Figure 6 Total Insoluble Matter for Q3 diagram

LEAD

There were no instances of lead deposition exceeding the leading indicator criteria onsite during quarter 4.

Offsite, there continued to be instances of lead deposition exceeding the leading indicator criteria to the north

of the former AZM operating area. As can be seen in Figure 7 below, the ML is surrounded by agriculture,

which is predominantly cropping. Gauges which are returning a higher than the leading indicator criteria lead

deposition are located next to agricultural fields which were reaped during quarter 4 and within the vicinity of

a recorded highly mineralised zone with an average of around 400mg/kg lead in the upper Tertiary soils – see

Figure 8. Overview of the historic offsite lead deposition rates in Appendix G shows no material change in lead

deposition over the life of the project to date.

There were no instances of lead deposition above the compliance limit of 0.5ug/m3.month, measured by the

high volume dust sampler.

All DDG dust data is located in Appendix G.

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Figure 7 Landuse and Dust Deposition Gauges 2016

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Figure 8 Lead concentrations in soil surrounding the ML overlain with local geology

6. WASTE DISPOSAL AND HAZARDOUS SUBSTANCES

There was no waste removed from site throughout the quarter outside of normal roadside council collection

bins.

7. TSF WATER / ACID MINE DRAINAGE

TSF DECANT POND REDUCED LEVEL

The reduced water level of the decant pond was surveyed to be 68.56m RL, equating to a surface area of

13,952m2, on the 24

th December 2016, within the compliance limit of 15,000m

2. Graph for the quarter is

included in Appendix I.

TSF SURFACE AREA

The surface area of the TSF decant pond was surveyed at 13,952m2 on the 24

th December.

Overall, 2016 has been the wettest year, as well as the wettest December on record since 1992 (BOM, 2017).

After the rainfall received in between Christmas and New Year, Terramin started a secondary pump with its

own evaporation sprinkler line to increase evaporation volume. This was in place is to manage the predicted

increasing occurrence of low pressure bands and associated rainfall events. The Bureau of Meteorology

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Climate Outlooks tool predicts a 75% chance of Strathalbyn receiving between 25 and 50mm of rain between

February and April and this pump will assist in managing this forecasted rainfall.

TSF SEEPAGE DRAIN FLOWS

The seepage drain flows in the TSF have remained significantly lower when compared to the operational phase

of the mine. This pattern can be expected to continue while AZM remains in Care and Maintenance and the

TSF water volumes are low. As seen in Figure 9 below, flows have decreased as the pressure head from the TSF

decant pond has reduced due to evaporation and the reduced depth of the decant pond due to the tailings

disposition from the sprinkler system. On the 16th

December, seepage flows were approximately 2L/minute –

see Figure 9.

Seepage drain flows since the TSF was commissioned are located in Appendix I.

Figure 9 Seepage drain flows for TSF through the Care and Maintenance phase to date

TSF GROUNDWATER MONITORING BORES

TSF bores were sampled and analysed monthly through quarter 3.

Standing water levels of TSF A, B and D have risen over the preceding 6 months (June to December) in line with

the increased rainfall received in the Strathalbyn region, as shown in Figure 10.

All bores (TSF A, B and D) reported concentrations at levels all below the leading indicator criteria for the

quarter.

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Litr

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Drain 1 Drain 2 Drain 3 Drain 4 Drain 5 Total Flow (L/min)

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Figure 10 Standing Water Level of TSF bores against rainfall

TSF PAF TESTWORK RESULTS

The acid testwork on the tailings dam surface advised by O’Kane Consultants (Review of Terramin’s AZM

MCMP, 2013) was undertaken in December 2016. O’Kane advised quarterly testwork for the initial 12 months,

and on the basis of the results have now revised the testwork regularity to be undertaken biannually. The next

round of test work will be completed in June 2017.

The International Framework for Acid Prevention (INAP) Global Acid Rock Drainage Guide (“GARD Guide”)

provides the following commentary regarding the evolution of AMD:

The chemical reaction representing pyrite oxidation requires three basic ingredients: pyrite, oxygen, and

water. The overall pyrite oxidation reaction generally is written as:

FeS2 + 7/2O2 + H2O = Fe2+ + 2SO4

2- + 2H

+

However, oxygen dissolved in water can also result in pyrite oxidation but due to its limited solubility in water,

this process is much less prominent. Aqueous ferric iron can oxidize pyrite as well according to the following

reaction:

FeS2 + 14Fe3+ + 8H2O = 15Fe

2+ + 2SO4

2- + 16H

+

The December testwork demonstrated a continuing of trends towards more acidic, both at surface and at

depth. This is to be expected, as oxidation of pyrite (FeS2) occurs naturally when exposed to atmospheric

conditions, such as air or water. With the increased percolation in the top section of the tailings due to rainfall

events and the sprinkler evaporation system operating on the TSF, this has resulted in a slightly accelerated

acidification of the tailings at the surface within the TSF, as can be seen in Figure 12. The material sampled at

depth (400-700mm), is more neutral in pH, than at the TSF surface. This is because pore space is reduced as

compared to the shallower samples which can be more easily disturbed by meteorological and anthropogenic

conditions (typically to a depth of 100mm) and are hence more compressed. Pore space, O2, H2O and AMD is

conceptualised in Figure 11, as taken from Figure 2-11 of the GARD Guide.

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Rainfall TSF A TSF B TSF D

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Figure 11 Pore space and AMD

Figure 12 TSF PAF Testwork results overtime

0.00

1.00

2.00

3.00

4.00

5.00

6.00

7.00

8.00

9.00

pH

(fie

ld)

1 - 100 1 - 700 2 - 100 2 - 700 3 - 100

3 - 700 4 - 100 4 - 700 5 - 100 5 - 700

6 - 100 6 - 700 7 - 100 7 - 700 8 - 100

8 - 700 9 - 100 9 - 700 10 - 100 10 - 700

11 - 100 11 - 700 12 - 100 12 - 700 13 - 100

13 - 700 16 - 100 16 - 700 Average Linear (Average)

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8. COMMUNITY ENGAGEMENT

STRATHALBYN COMMUNITY CONSULTATION COMMITTEE (SCCC)

An SCCC meeting was held on the 24th

November 2016 and reported to the SCCC AZM’s status against

Outcome Measurable Criteria, derived from lease conditions for ML6229.

The meeting was held at the Angas Zinc Mine and included a site tour. Members of the committee reviewed

the condition of the TSF, revegetation success in the Western Significant Environmental Benefit area and the

low lying evaporation - silt retention area that has the potential for growing native basket weaving reeds which

is an interest for local historians.

Chairperson Kelvin Trimper has requested the CCC submit suggestions to Terramin as to how best to present a

summary of the Closure Plan. To date, no suggestions have been received. Terramin will submit a summary of

the Closure Plan to the CCC prior to the CCC meeting scheduled for the 16th

February.

Chairperson Kelvin Trimper tabled a written Chairperson’s report for SCCC members, reporting on his quarterly

activities for Q2. Terramin confirmed the validity of the existing waivers put in place under ML6229, as

requested at the previous CCC meeting held in May 2016. The Committee also agreed to view the Closure Plan

after the plan has been reviewed by DSD experts and approved by the DSD. Terramin will provide a summary

document upon completion and provide this to the SCCC, media and wider public.

COMPLAINTS REGISTER

No complaints were received through Terramin’s hotline or lodged with the Environmental and Community

Superintendent throughout Q4 of 2016.

9. MISCELLANEOUS NEWS

DSD conducted a quarterly compliance visit on 24th

November and observed the site to be compliant. The

compliance visit was accompanied by members of DSD, including Mine Closure Regulator Antonia Scrase, Site

Regulator Kyle Rice, and Site Assessment Officer Paul Thompson. The review incorporated the inspection for

recommendation for the extension of ML6229. Terramin submitted the request for extension of the lease as

per Mining Act 1971 – Parts 6, 6A and 8 in May 2016 in the 3 months prior to the end of the lease term.

Hillgrove continued to clean-up and maintenance the area which they have been leasing over the preceding 24

months. This work is envisaged to continue throughout Q1:2017.

10. SUMMARY

Angas Zinc Mine continued to be maintained through the Care and Maintenance period:

The continuation of the Care and Maintenance Environmental Monitoring Plan;

The process plant, including crusher, mill and floatation areas, received regular maintenance;

Onsite water management, plant upkeep, rehabilitation vegetation and SEB areas maintained.

Hillgrove staff remained onsite 1-2 days per week to clean and repair the concentrate shed;

There were no non-compliances against Lease Condition Outcomes for Quarter 4, 2016.

The SCCC continue to meet quarterly.

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11. REFERENCES

INAP. (2014). The International Network for Acid Prevention Global Acid Rock Drainage Guide, Revision 1.

Bureau of Meteorology. (2017). Climate Data Online for Strathalbyn, 023747. www.bom.gov.au.

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12. APPENDIX A – ANGAS ZINC MINE – FILLED AND UNFILLED VOIDS

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13. APPENDIX B – WATER MONITORING LOCATIONS

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14. APPENDIX C – SURFACE WATER MONITORING DATA

Date Oct-16

Site Units

Croser 1

Croser 2

Croser 3

Mean Croser

Hogben 1

Hogben 2

Hogben 3


pH pH 8.09 7.87 7.98 7.98 7.83 8.02 8.02 7.956667 0.867 4.303

EC-L us/cm 1530 1460 1430 1473.333 1350 1350 1350 1350 0.053 4.303

TDS-180 mg/L 853 810 827 830 786 791 813 796.6667 0.187 4.303

Turbidity NTU 8 8 7 7 Under detection

limits

SO4-D mg/L 51 43 43 45.66667 43 41 43 42.33333 0.300 4.303

As-T mg/L 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 Under detection

limits

Cd-T mg/L 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 Under detection

limits

Cu-T mg/L 0.002 0.002 0.002 0.002 0.011 0.002 0.002 0.005 0.423 4.303

Pb-T mg/L 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 Under detection

limits

Mn-T mg/L 0.028 0.028 0.028 0.028 0.023 0.025 0.026 0.024667 0.063 4.303

Se-T mg/L 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 Under detection

limits

Zn-T mg/L 0.005 0.005 0.009 0.006333 0.005 0.006 0.005 0.005333 0.580 4.303

Fe-T mg/L 0.57 0.6 0.59 0.586667 0.52 0.56 0.6 0.56 0.287 4.303

NOX-N mg/L 0.04 0.04 0.04 0.04 0.04 0.05 0.05 0.046667 0.184 4.303

TKN-N mg/L 0.8 0.9 0.6 0.766667 0.8 0.7 0.8 0.766667 1.000 4.303

N-T mg/L 0.8 0.9 0.6 0.766667 0.8 0.8 0.8 0.8 0.742 4.303

P-T mg/L 0.06 0.09 0.15 0.1 0.07 0.07 0.07 0.07 0.374 4.303

____ Under detection limits

21

15. APPENDIX D – GROUNDWATER MONITORING DATA

GROUNDWATER QUALITY RAW DATA

Date Criteria Leading

Indicator

October 2016

Site Units RG1 RG4 RG8

pH pH 8.70 8.15 7.71 7.85 7.94

EC-L uS/cm 68500 53670 10800 11000 29300

TDS mg/L 25000 24843 6290 6170 19400

As-T mg/L 0.090 0.038 711 526 2050

Cd-T mg/L 0.0100 0.004 <0.001 0.001 <0.001

Pb-T mg/L 0.820 0.262 <0.0001 0.0002 0.0001

Zn-T mg/L 4.400 1.704 0.001 <0.001 <0.001

Se-T mg/L 0.130 0.088 0.019 0.013 0.017

Fe-T mg/L 232.00 69.02 0.02 0.02 <0.01

22

GROUNDWATER QUALITY GRAPHS

0.00

2.00

4.00

6.00

8.00

10.00

Jan-16 Feb-16 Mar-16 Apr-16 May-16 Jun-16 Jul-16 Aug-16 Sep-16 Oct-16

pH

un

its

pH

RG1 RG4 RG8 PEPR Criteria

0

20000

40000

60000

80000


us/

cm

EC


0

5000

10000

15000

20000

25000

30000


mg/

L

TDS


23

0

0.02

0.04

0.06

0.08

0.1


mg/

L As


0

0.002

0.004

0.006

0.008

0.01

0.012


mg/

L

Cd


0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9


mg/

L

Pb


24

0

1

2

3

4

5


mg/

L Zn


0

50

100

150

200

250


mg/

L

Fe

Fe Fe Fe Fe

0

0.02

0.04

0.06

0.08

0.1

0.12

0.14


mg/

L

Se


25

16. APPENDIX E – GROUNDWATER STANDING WATER LEVELS

PEPR criteria is no drawdown further than 1m from baseline data values obtained in 2006 (outlined below)

PEPR Criteria (m)

RG1 9.64 RG4 29.15 RG8 8.56

0

20

40

60

80

100

120

140

160

180

2000

5

10

15

20

25

30

35

Rai

nfa

ll/m

on

th (

mm

)

SWL

(m)

Rainfall RG1 RG1 PEPR criteria RG4 RG4 PEPR Criteria RG8 RG8 PEPR Criteria

26

17. APPENDIX F – DUST MONITORING LOCATIONS

27

18. APPENDIX G – DUST LEADING INDICATOR DATA – DUST DEPOSITION GAUGES

TOTAL INSOLUBLE MATTER

NB: High levels of insoluble matter picked up in gauges 6, 3, 12 and 10 in November and in gauge 12 in December are thought to be related to off-site agricultural

harvesting to the north of the site. November and December are typically harvesting months.

0

5

10

15

20

25

30

35

40

7 5 4 2 8 1 6 9 11 3 12 10

g/m

2.m

on

th

Gauge number

Total Insoluable Matter

Oct-16 Nov-16 Dec-16

28

OFFSITE LEAD MEASUREMENTS

Figure 13 Historic offsite lead deposition

NB: Gauges 2, 3, and 10 are off-site to the north, prevailing winds for the period were Westerly. Due to no activity on the mine site, elevated levels are due to agricultural

activity in the area and the natural levels of lead in the soils in the area. The leading indicator is 150mg/kg, Terramin and government records show natural soil levels are

often higher than 150mg/kg in these paddocks.

0

200

400

600

800

1000

1200

1400Ja

n-0

8

Ap

r-0

8

Jul-

08

Oct

-08

Jan

-09

Ap

r-0

9

Jul-

09

Oct

-09

Jan

-10

Ap

r-1

0

Jul-

10

Oct

-10

Jan

-11

Ap

r-1

1

Jul-

11

Oct

-11

Jan

-12

Ap

r-1

2

Jul-

12

Oct

-12

Jan

-13

Ap

r-1

3

Jul-

13

Oct

-13

Jan

-14

Ap

r-1

4

Jul-

14

Oct

-14

Jan

-15

Ap

r-1

5

Jul-

15

Oct

-15

Jan

-16

Ap

r-1

6

Jul-

16

Oct

-16

Lead

de

po

siti

on

(m

g/kg

)

Offsite Lead Measurements

2 3 10 11 12

29

ONSITE LEAD MEASUREMENTS

NB: Gauge 9 is situated on the southern boundary adjacent to a cropped field, additional dust levels are attributed to agricultural activity, Leading indicator is 750mg/kg.

0.000

100.000

200.000

300.000

400.000

500.000

600.000

700.000

800.000

900.000

1000.000

Oct-16 Nov-16 Dec-16

mg/

kg

Onsite Lead Deposition

1 4 5 6 7 8 9

30

31

19. APPENDIX H – COMPLIANCE CRITERIA – HIVOL

TOTAL SOLID PARTICULATE MEASUREMENTS

0

20

40

60

80

100

120

1402

/10

/20

16

8/1

0/2

01

6

14

/10

/20

16

20

/10

/20

16

26

/10

/20

16

1/1

1/2

01

6

7/1

1/2

01

6

13

/11

/20

16

19

/11

/20

16

25

/11

/20

16

1/1

2/2

01

6

7/1

2/2

01

6

13

/12

/20

16

19

/12

/20

16

25

/12

/20

16

31

/12

/20

16

ug/

m3

Western Unit PEPR Criteria

32

PM10 MEASUREMENTS

LEAD MEASUREMENTS

0

0.1

0.2

0.3

0.4

0.5

0.6

µg/

m³

PEPR criteria Northern Unit

33

0

0.1

0.2

0.3

0.4

0.5

0.6µ

g/m

³

PEPR criteria Northern Unit

34

20. APPENDIX I – TSF

DECANT POND REDUCED LEVEL THROUGHOUT CARE AND MAINTENANCE

10.0

20.0

30.0

40.0

50.0

60.0

60.00

62.00

64.00

66.00

68.00

70.00

72.00

74.00

76.00

78.00

1/1

1/2

013

1/1

2/2

013

1/0

1/2

014

1/0

2/2

014

1/0

3/2

014

1/0

4/2

014

1/0

5/2

014

1/0

6/2

014

1/0

7/2

014

1/0

8/2

014

1/0

9/2

014

1/1

0/2

014

1/1

1/2

014

1/1

2/2

014

1/0

1/2

015

1/0

2/2

015

1/0

3/2

015

1/0

4/2

015

1/0

5/2

015

1/0

6/2

015

1/0

7/2

015

1/0

8/2

015

1/0

9/2

015

1/1

0/2

015

1/1

1/2

015

1/1

2/2

015

1/0

1/2

016

1/0

2/2

016

1/0

3/2

016

1/0

4/2

016

1/0

5/2

016

1/0

6/2

016

1/0

7/2

016

1/0

8/2

016

1/0

9/2

016

Rain

fall (

mm

/day)

Red

uced

Lev

el (m

)

Angas Mine Rainfall Records

Rainfall Actual Water level RL(m) Spillway RL (m) Target RL

35

SEEPAGE DRAIN FLOWS

0

1

2

3

4

5

6

7O

ct-1

3

No

v-1

3

De

c-1

3

Jan

-14

Feb

-14

Mar

-14

Ap

r-1

4

May

-14

Jun

-14

Jul-

14

Au

g-1

4

Sep

-14

Oct

-14

No

v-1

4

De

c-1

4

Jan

-15

Feb

-15

Mar

-15

Ap

r-1

5

May

-15

Jun

-15

Jul-

15

Au

g-1

5

Sep

-15

Oct

-15

No

v-1

5

De

c-1

5

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

De

c-1

6

Litr

es/

min

ute

Drain 1 Drain 2 Drain 3 Drain 4 Drain 5 Total Flow (L/min)

36

21. APPENDIX J – TSF MONITORING BORES

5.5

6

6.5

7

7.5

8

8.5

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

De

c-1

6

pH

pH

TSFA TSFB TSFD Leading indicator Leading indicator

0

5000

10000

15000

20000

25000

30000

35000

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

De

c-1

6

EC (

uS/

cm)

EC

TSFA TSFB TSFD Leading Indicator

37

TSF B has recorded cadmium under detection limits since January 2010

0

0.005

0.01

0.015

0.02

0.025

0.03

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

De

c-1

6

As

(mg/

L)

Arsenic

TSFA TSFB TSFD LeadingIndicator

0

0.001

0.002

0.003

0.004

0.005

0.006

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

Dec

-16

Cd

(m

g/L)

Cd


38

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

De

c-1

6

Pb

(m

g/L)

Lead

TSFA TSFB TSF D Leading Indicator

0

0.5

1

1.5

2

2.5

3

3.5

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

De

c-1

6

Zinc

TSFA TSFB TSF D Leading Indicator

Zn (

mg/

L)

39

0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

De

c-1

6

Mn

(m

g/L)

Manganese

TSFA TSFB TSFD

0

20

40

60

80

100

120

140

160

180

200

Jan

-16

Feb

-16

Mar

-16

Ap

r-1

6

May

-16

Jun

-16

Jul-

16

Au

g-1

6

Sep

-16

Oct

-16

No

v-1

6

De

c-1

6

Fe (

mg/

L)

Iron


40

22. APPENDIX K – TSF SEEPAGE DRAINS

Documents

Quarterly Environment Report · 2 EXECUTIVE SUMMARY This Quarterly Environment Report (QER) for the Angas Zinc Mine (AZM) summarises the results of the environmental monitoring program