SOUTH32 SA COAL HOLDINGS (Pty) Limited Proposed South32 …
Transcript of SOUTH32 SA COAL HOLDINGS (Pty) Limited Proposed South32 …
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SOUTH32 SA COAL HOLDINGS (Pty) Limited
Proposed South32 SA Coal Holdings (Pty) Limited (CSA) Khutala Life Extension Project
(KLX)
Water Monitoring Report for the period: August 2012 – June 2016
October 2016
Project # A0520
Report # JKC_0615
Client
South32 SA Coal Holdings (Pty) Limited
P.O. Box 61820
Marshalltown
21079
Water Monitoring Report for the period: August 2012 – June 2016 for KLX – Project A0520 – Report # JKC_0615
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PROJECT DETAILS
Name of Project: KLX Project
Mining right reference: MP 30/5/1/2/2/118 MR
Name of Applicant: South32 SA Coal Holdings (Pty) Limited
Responsible person: Winrie Kruger
Contact person Clinton Lee
Postal Address: P.O. Box 61820, Marshalltown, 2107
Telephone: +27 13 689 4318
Facsimile: +27 11 376 2160
E-mail: [email protected]
Environmental Consultant (EAP): Jaco – K Consulting CC
Responsible person: Stephan Kitching
Author of this document: Stephan Kitching
Physical address: 2 Walter Sisulu Street, Unit 3,
Midlands Office Park, Middelburg, 1050
Postal Address: Suite 445 MW, Private Bag X1838,
Middelburg, 1050
Telephone: (013) 243 7110
Facsimile: (086) 665 9703
E-mail: [email protected]
Expertise of EAP: Jaco Kleynhans: Professional Environmental
Engineer, registered with the Engineering Council
of South Africa (ECSA). Registration No: 940108.
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TABLE OF CONTENTS
1 DESCRIPTION OF PROPOSED ACTIVITY ....................................................................... 5
2 COMPLIANCE DESCRIPTION .......................................................................................... 7
2.1 Surface Water Quality ...................................................................................................... 7
2.2 Groundwater Quality ...................................................................................................... 10
3 OVERVIEW OF MONITORING POINT LOCALITIES ....................................................... 12
3.1 Surface water ................................................................................................................ 17
3.2 Groundwater .................................................................................................................. 18
4 COMPLIANCE STATUS .................................................................................................. 20
4.1 Surface water Compliance ............................................................................................. 20
4.2 Groundwater Compliance .............................................................................................. 23
5 GENERAL COMMENTS AND RECOMMENDATIONS .................................................... 25
5.1 General Comments ........................................................................................................ 25
5.1.1 Surface water.............................................................................................................. 25
5.1.2 Groundwater ............................................................................................................... 26
6 REFERENCES ................................................................................................................ 28
TABLE OF TABLES
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Table 1: Surface water RWQO for the KLX project ............................................................................. 7
Table 2: Surface water monitoring points ............................................................................................. 9
Table 3: Sulphate limit for Wilge River Catchment ............................................................................ 10
Table 4: Sulphate limit for Witbank Dam Catchment ........................................................................ 10
Table 5: Groundwater monitoring points ............................................................................................. 11
Table 6: Monitoring points for the KLX project ................................................................................... 13
Table 7: Wilge river Sulphate compliance (60mg/l) ........................................................................... 20
Table 8: Witbank Dam Sulphate compliance (500mg/l) ................................................................... 21
Table 9: Groundwater SO4 compliance ............................................................................................... 23
Table 10: Groundwater quality results (adapted from: Botha, 2016) .............................................. 26
Table 11: Groundwater quality guidelines .......................................................................................... 27
TABLE OF FIGURES
Figure 1: Locality of the KLX project .......................................................................................... 6
Figure 2: Surface water monitoring layout for the KLX project ................................................. 18
Figure 3: Groundwater monitoring layout for the KLX project .................................................. 19
Figure 4: Surface water Sulphate compliance map for the KLX project ................................... 22
Figure 5: Groundwater Sulphate compliance map for the KLX project ..................................... 24
ANNEXURES
Annexure 1: General
Annexure 2: Hydrochemistry Data and Time Dependent Graphs
Annexure 3: Maps
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ABBREVIATIONS AND ACCRONYMS
ABA - Acid Base Accounting
AMD - Acid Mine Drainage
ARD - Acid Rock Drainage
BAP - Biodiversity Action Plan
CSBS - Clean Stream Biological Services
DARDLEA - Department of Agriculture, Rural Development, Land and Environmental Affairs
DLA - Department of Land Affairs
DMR - Department of Mineral Resources
DW - Digby Wells & Associates
DWA - Department of Water Affairs
DWS - Department of Water and Sanitation
EIA - Environmental Impact Assessment
EMP - Environmental Management Programme
IAP - Interested and Affected Party
IAPs - Interested and Affected Parties
IWWMP - Integrated Water and Waste Management Plan
JKC - Jaco-K Consulting
LOM - Life of Mine
MPRDA - Minerals, Petroleum and Resources Development Act, 2002 (Act No. 28 of 2002)
NEMA - National Environmental Management Act, 1998 (Act No. 107 of 1998)
NEMBA - National Environmental Management: Biodiversity Act, 2004 (Act No.10 of 2004)
NEMWA - National Environmental Management: Waste Act, 2008 (Act No. 59 of 2008)
NWA - National Water Act, 36 (Act No. 36 of 1998)
RWQO - Resource Water Quality Objective
U/G - Underground
WUL - Water use licence
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1 DESCRIPTION OF PROPOSED ACTIVITY
Jaco – K Consulting (JKC) was appointed by South 32 SA Coal Holdings (Pty) Limited (CSA) to
compile a water monitoring report for the period: August 2012 – June 2016. Khutala Colliery is
owned by South 32 SA Coal Holdings (Pty) Limited (CSA), formerly known as BHP Billiton
Energy Coal South Africa (Pty) Limited (BECSA). The proposed mining project is located within
the existing Khutala Colliery premises. The proposed mine falls within the Emalahleni Local
Municipality, and within the greater Nkangala District Municipality, as seen on Figure 1.
Khutala Colliery is located some 8 km south-west of the town of Ogies and 35 km south-west of
Emalahleni, and just about 5-km south-east of the Kendal Power Station in Mpumalanga
Province, South Africa.
Khutala Colliery is a large, multi-seam and multi-section predominately underground mine in
the Witbank Coalfield of Mpumalanga Province of South Africa. With an annual maximum
production of 13.3 million tonnes (Mt) of run-of-mine (ROM) coal per annum, Khutala Colliery is
one of the largest underground coal mines in South Africa.
Coal mined from the Khutala Colliery is supplied to the Kendal Power Station since November
1986. The requirement for coal from Khutala Colliery has been increasing annually due to the
increasing South African energy demands. Since 2006 Kendal Power Station requires more
than the initial 13.3 Mt of coal per annum (more than 15Mt is now required) which may continue
to increase.
Recent life-of-mine (LOM) plans have confirmed a future shortfall in the existing underground
coal reserves to meet the power station’s needs. A series of earlier studies have concluded that
the conversion of the colliery from underground to opencast is the best way to increase
resource utilisation meeting production levels and power station needs. The objective of the
study is to extend the life of Khutala Colliery by at least 10 years and for CSA to continue to
supply Kendal Power Station with coal up until 2033, hence the Khutala Life Extension (KLX)
Project.
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Figure 1: Locality of the KLX project
The Water Monitoring Report for the KLX Project consists of the following:
Surface water inorganic chemistry analysis; and
Groundwater inorganic chemistry analysis.
Regen Waters Laboratory (a SANAS accredited laboratory – see Annexure 1 for SANAS
Certificate), is responsible for the water sampling and analysis of the monitoring points related
to the KLX Project. This report was compiled using raw data from Regen Waters Laboratory
from August 2012 up until June 2016 for the surface water monitoring points and it includes
Time Dependent Graphs (Annexure 2) for the relevant environmental monitoring points. The
groundwater quality data was obtained from the most recent groundwater study done by
Groundwater Square (2016).
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2 COMPLIANCE DESCRIPTION
Compliance is visually displayed in thematic maps indicating compliance with size and colour
coding. The collective monitoring points, in terms of surface water and groundwater are used
when compiling compliance maps; these maps can be found in Annexure 3. The localities of
monitoring points relative to the mine infrastructure are displayed in topographical maps by
making use of the most appropriate scale. Please refer to Figures 2 and 3.
Auditing of the analyses results aims to:
Identify current impact areas;
Describe these impacts;
Evaluate the significance of these impacts, provided that the available data indicates a
sound link-up between the suspected pollution source and receptor; and
Establish long term monitoring requirements.
2.1 Surface Water Quality
The proposed KLX Project will be located over 2 quaternary catchments, two sets of resource
water quality objectives (RWQO) and water quality guidelines were identified to be applicable to
this project. These include:
The interim Wilge River RWQO, management unit 22 (applicable to B20E); and
The Witbank Dam RWQO (applicable to B11F).
The various RWQO’s are represented in Table 1:
Table 1: Surface water RWQO for the KLX project
Water Quality Variables Units Wilge Catchment
Witbank Dam Catchment
SANS 241-1:2015
Conductivity mS/m 40 ≤ 111
Dissolved Oxygen % sat 70
Chemical Oxygen Demand (COD)
mg/l
pH - 6.5 – 8.4 5 – 9.7
Suspended Solids mg/l
Turbidity NTU ≤ 10
Chemical, Inorganic
Alkalinity mg CaCO3/l 120 ≥ 60
Ammonia (NH4) mg/l ≤ 0.1
Boron mg/l 0.5
Arsenic mg/l ≤ 0.13
Calcium mg/l 25
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Water Quality Variables Units Wilge Catchment
Witbank Dam Catchment
SANS 241-1:2015
Chloride mg/l 20
Fluoride mg/l 0.5 ≤ 3.0
Magnesium mg/l 20
Potassium mg/l 10
Sodium mg/l 20
SAR (meql0.5
) (meql0.5
) 1.0
Sulphate mg/l 60 ≤ 500
Total Dissolved Solids mg/l 280 ≤ 1200
Chemical, Organic
Dissolved Organic Carbon mg/l 10
Metals, Dissolved
Iron mg/l 1.0 ≤ 0.3
≤ 2.0
Manganese mg/l 0.18 ≤ 1.3
Aluminium mg/l 0.02 ≤ 0.15
Chromium VI µg/l 0.05 ≤ 200
Cadmium µg/l ≤ 5
Plant Nutrients
Ammonia mg/l as N 0.007
Nitrate mg/l as N 6 ≤ 4
Phosphate mg/l as P 0.05 ≤ 0.125
Total Phosphorus mg/l as P 0.25
Total Inorganic Nitrogen mg/l as N 2.5
Please note that objectives have not been set for all of the parameters and therefore SANS
241-1:2015 is also used for omitted parameters. A water quality monitoring network was
established in 2012. The proposed KLX project is situated within the Witbank Dam catchment
within the sub-catchment B11F (KLX mining activities) and B20E (modular plant), which is
within Quaternary Catchment B20E of the Olifants River (Surface Water Resources of South
Africa – 1990). There are 33 surface water monitoring points in total, 11 – Modular Plant
(B20E), 11 – MRD’s (B11F) and 11 – KLX (B11F).
Surface water hydrochemistry data is attached in Annexure 2 along with Time Dependent
Graphs for various constituents, indicative of concentration change with time. The compliance
maps are attached in Annexure 3.
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Table 2: Surface water monitoring points
Name South East Description QC
1553 26° 06' 56.00" 29° 00' 46.00" D/S surface water balance dam B11F
1560 26° 07' 31.60" 28° 59' 46.00" Clean water dam U/S farmers dam B20E
1562 26° 07' 28.30" 28° 59' 23.40" Farmers dam U/S Block I O/C B20E
1568 26° 07' 04.00" 28° 59' 24.00" D/S sewage plant B20E
1600 26° 05' 20.40" 29° 01' 08.50" Block A dam U/s B11F
1603 26° 07' 26.30" 29° 00' 22.20" Oil separator - before B11F
1604 26° 05' 18.18" 29° 01' 27.60" D/S final void @ Zondagsvlei B11F
1605 26° 05' 06.24" 29° 01' 20.10" U/S final void @ Zondagsvlei B11F
1606 26° 05' 03.54" 29° 01' 30.00" Final void @ Zondagsvlei B11F
1611 26° 05' 45.60" 29° 01' 01.10" Block A O/C dam B11F
1615 26° 07' 22.20" 28° 59' 08.58" Northern stream - U/S Block I B20E
1617 26° 07' 54.70" 28° 58' 29.50" Northern stream - D/S Block I B20E
1618 26° 07' 48.40" 28° 58' 11.40" D/S Block I after confluence 1615 and 1616 B20E
1621 26° 06' 18.60" 29° 01' 02.70" Scharrighuisen Pollution Control Dam B11F
1622 26° 06' 18.00" 29° 01' 25.70" Sump along the road next to the gate B11F
1624 26° 08' 13.02" 28° 58' 49.92" Washability plant B20E
1625 26° 07' 23.40" 28° 59' 55.00" U/S of Main Poll. Contr. dam B20E
1627 26° 07' 23.10" 28° 58' 56.60" Block I Dam 1 B20E
1628 26° 07' 24.90" 28° 58' 44.10" Block I Dam 2 B20E
1636 26° 07' 44.80" 28° 58' 26.20" KTL7 B20E
1660 26° 08' 29.50" 29° 01' 46.30" Fan 5 Farmers dam B11F
1661 26° 04' 39.60" 29° 01' 03.50" Ogies farm dam B11F
1662 26° 05' 19.32" 29° 01' 48.48" Goedgevonden river d/s block A (below 1604) B11F
7200 26° 10’ 12.86” 29° 03' 56.88" B11F
7201 26° 09' 09.80" 29° 03' 20.20" Dam behind farm dam B11F
7202 26° 08' 12.70" 29° 03' 00.70" Wetland stream B11F
7203 26° 08' 15.50" 29° 03' 06.90" Stream B11F
7204 26° 08' 22.90" 29° 02' 29.80" B11F
7205 26° 07' 58.70" 29° 03' 23.60" B11F
7206 26° 07' 32.70" 29° 03' 45.30" B11F
7207 26° 10' 01.10" 29° 02' 37.80" B11F
7208 26° 09' 09.50" 29° 02' 40.10" B11F
7209 26° 07' 32.50" 29° 03' 37.10" B11F
Modular Plant
MRD’s
KLX
The water qualities of monitoring points colour coded in orange will be measured against water
quality objectives set for catchment B20E and the monitoring points in blue and green will be
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measured against water quality objectives set for catchment B11F. The omitted parameters will
be measured against SANS 241-1: 2015, please refer to Table 1 for the water quality
objectives. The status of a water resource can be described by the use of a macro indicator of
potential pollution such as Sulphate (SO4). As this is a coal mining environment, the use of
Sulphate concentration is deemed appropriate in terms of evaluating compliance with water
quality standards. Table 1 indicates that the Sulphate limit for the Wilge River Catchment is
60mg/l and for the Witbank Dam catchment the Sulphate limit is 500 mg/l. Average values for
Sulphate are displayed in this report; it is however important that Annexure 2 be used as a true
indicator for all parameters tested throughout the year. All of the monitoring points were
analysed for an array of constituents, for the purpose of this report only TDS (Total Dissolved
Salts/Solids), SO4 (Sulphate), Fe (Iron), Mn (Manganese), EC (Electrical Conductivity), pH and
Al (Aluminium) were included. The reason that these parameters were chosen is that they
represent the most important constituents in a mining environment (coal mining) and these
constituents can give a representative conclusion as to the status of the water resource.
The Sulphate limits for the respective catchments mentioned above are used when assigning
compliance; compliance is assigned in terms of colour coding. Monitoring points that are non-
compliant are assigned a shade of red colour coding while compliant points are assigned a
shade of green colour coding. Please refer to Tables 3 and 4 for the compliance colour coding
related to the respective catchments.
Table 3: Sulphate limit for Wilge River Catchment
RWQO for Wilge River Catchment
0 - 60mg/l SO4
> 60mg/l SO4
Table 4: Sulphate limit for Witbank Dam Catchment
RWQO for Witbank Dam Catchment
0 - 500mg/l SO4
> 500mg/l SO4
2.2 Groundwater Quality
The groundwater monitoring points relevant to this report have been extracted from the
following document:
Water Monitoring Report for the period: August 2012 – June 2016 for KLX – Project A0520 – Report # JKC_0615
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Khutala Colliery, KLX Project, EIA/EMP Amendment, Groundwater Impact Assessment
done by Groundwater Square. 2016. Reference no.: 185f_Khutala-KLX Project.
There is a large amount of boreholes drilled in the project area, 18 newly drilled boreholes were
selected to display the groundwater quality. The groundwater monitoring points are tabulated in
Table 5 below.
Table 5: Groundwater monitoring points
Name South East
BHUG-1 26° 06' 22.36" 29° 00' 13.72"
BHUG-2 26° 05' 50.21" 29° 00' 04.97"
BHUG-3 26° 05' 24.65" 28° 59' 56.00"
BHUG-4 26° 04' 46.74" 28° 59' 34.94"
BHUG-5 26° 04' 29.71" 28° 59' 56.69"
BHUG-6 26° 04' 57.00" 28° 59' 54.67"
BHUG-7 26° 05' 00.67" 29° 00' 22.86"
BHUG-8 26° 04' 43.00" 29° 00' 37.87"
KLX-B1M 26° 07' 09.73" 29° 04' 45.84"
KLX-B2M 26° 07' 23.88" 29° 04' 36.05"
KLX-B2S 26° 07' 23.99" 29° 04' 35.98"
KLX-B3D 26° 07' 14.16" 29° 06' 11.52"
KLX-B3S 26° 07' 14.41" 29° 06' 11.48"
KLX-B4M 26° 07' 55.92" 29° 06' 00.94"
KLX-B4S 26° 07' 56.06" 29° 06' 00.94"
KLX-B5M 26° 08' 20.76" 29° 04' 53.62"
KLX-B6D 26° 08' 55.32" 29° 04' 51.78"
KLX-B6S 26° 08' 55.43" 29° 04' 51.71"
The boreholes with the prefix KLX represent the proposed future groundwater monitoring points
relevant to the mining area. The boreholes with the prefix BHUG represents the boreholes
drilled into the old Kendal Seam 5 underground workings. These boreholes are also used to
assess the possibility of mine flooding.
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3 OVERVIEW OF MONITORING POINT LOCALITIES
Table 6 represents the monitoring points as well as co-ordinates thereof at KLX; these points
are also graphically represented in Figures 2 and 3. The information with regards to the
localities and descriptions of the monitoring points were obtained from the following documents:
Specialist surface water report as input to the EIA for the KLX Project, Report No.:
JKC_0580 (JKC, 2016) and;
Groundwater Impact Assessment as input to the EIA/EMP Amendment for the KLX
Project. Unpublished report done by Groundwater Square for Khutala Colliery.
Reference no.: 185f_Khutala-KLX Project.
For identification purposes colour coding was assigned in the tables to the different groups as
follows:
Surface Water monitoring points – shaded light blue
o Removed point – shaded yellow
Groundwater monitoring points – shaded green
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Table 6: Monitoring points for the KLX project
Site Label Mine Type Sampling
Frequency GW
Levels Description Latitude Longitude
1553 KLX SW Monthly NA D/S surface water balance dam 26° 06' 56.00" 29° 00' 46.00"
1560 KLX SW Monthly NA
Clean water dam U/S farmers dam 26° 07' 31.60" 28° 59' 46.00"
1562 KLX SW Monthly NA
Farmers dam U/S Block I O/C 26° 07' 28.30" 28° 59' 23.40"
1568 KLX SW Monthly NA
D/S sewage plant 26° 07' 04.00" 28° 59' 24.00"
1600 KLX SW Monthly NA
Block A dam U/s 26° 05' 20.40" 29° 01' 08.50"
1603 KLX SW Monthly NA
Oil separator - before 26° 07' 26.30" 29° 00' 22.20"
1604 KLX SW Monthly NA
D/S final void @ Zondagsvlei 26° 05' 18.18" 29° 01' 27.60"
1605 KLX SW Monthly NA
U/S final void @ Zondagsvlei 26° 05' 06.24" 29° 01' 20.10"
1606 KLX SW Monthly NA
Final void @ Zondagsvlei 26° 05' 03.54" 29° 01' 30.00"
1611 KLX SW Monthly NA
Block A O/C dam 26° 05' 45.60" 29° 01' 01.10"
1615 KLX SW Monthly NA
Northern stream - U/S Block I 26° 07' 22.20" 28° 59' 08.58"
1617 KLX SW Monthly NA
Northern stream - D/S Block I 26° 07' 54.70" 28° 58' 29.50"
1618 KLX SW Monthly NA
D/S Block I after confluence 1615 and 1616 26° 07' 48.40" 28° 58' 11.40"
1621 KLX SW Monthly NA
Scharrighuisen Pollution Control Dam 26° 06' 18.60" 29° 01' 02.70"
1622 KLX SW Monthly NA
Sump along the road next to the gate 26° 06' 18.00" 29° 01' 25.70"
1624 KLX SW Monthly NA
Washability plant 26° 08' 13.02" 28° 58' 49.92"
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Site Label Mine Type Sampling
Frequency GW
Levels Description Latitude Longitude
1625 KLX SW Monthly NA
U/S of Main Poll. Contr. dam 26° 07' 23.40" 28° 59' 55.00"
1627 KLX SW Monthly NA
Block I Dam 1 26° 07' 23.10" 28° 58' 56.60"
1628 KLX SW Monthly NA
Block I Dam 2 26° 07' 24.90" 28° 58' 44.10"
1636 KLX SW Monthly NA
KTL7 26° 07' 44.80" 28° 58' 26.20"
1660 KLX SW Monthly NA
Fan 5 Farmers dam 26° 08' 29.50" 29° 01' 46.30"
1661 KLX SW Monthly NA
Ogies farm dam 26° 04' 39.60" 29° 01' 03.50"
1662 KLX SW Monthly NA
Goedgevonden river d/s block A (below 1604) 26° 05' 19.32" 29° 01' 48.48"
7200 KLX SW Monthly NA
26° 10’ 12.86” 29° 03' 56.88"
7201 KLX SW Monthly NA
Dam behind farm dam 26° 09' 09.80" 29° 03' 20.20"
7202 KLX SW Monthly NA
Wetland stream 26° 08' 12.70" 29° 03' 00.70"
7203 KLX SW Monthly NA
Stream 26° 08' 15.50" 29° 03' 06.90"
7204 KLX SW Monthly NA
26° 08' 22.90" 29° 02' 29.80"
7205 KLX SW Monthly NA
26° 07' 58.70" 29° 03' 23.60"
7206 KLX SW Monthly NA
26° 07' 32.70" 29° 03' 45.30"
7207 KLX SW Monthly NA
26° 10' 01.10" 29° 02' 37.80"
7208 KLX SW Monthly NA
26° 09' 09.50" 29° 02' 40.10"
7209 KLX SW Monthly NA
26° 07' 32.50" 29° 03' 37.10"
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Site Label Mine Type Sampling
Frequency GW
Levels Description Latitude Longitude
BHUG-1 KLX GW N/A 55.75
Historical Khutala Seam-5 U/G Workings 26° 06' 22.36" 29° 00' 13.72"
BHUG-2 KLX GW N/A Dry Historical Khutala Seam-5 U/G Workings
26° 05' 50.21" 29° 00' 04.97"
BHUG-3 KLX GW N/A 14.70 Historical Khutala Seam-5 U/G Workings
26° 05' 24.65" 28° 59' 56.00"
BHUG-4 KLX GW N/A 28.24 Historical Khutala Seam-5 U/G Workings 26° 04' 46.74" 28° 59' 34.94"
BHUG-5 KLX GW N/A 32.93 Historical Khutala Seam-5 U/G Workings 26° 04' 29.71" 28° 59' 56.69"
BHUG-6 KLX GW N/A 54.58 Historical Khutala Seam-5 U/G Workings 26° 04' 57.00" 28° 59' 54.67"
BHUG-7 KLX GW N/A Dry Historical Khutala Seam-5 U/G Workings 26° 05' 00.67" 29° 00' 22.86"
BHUG-8 KLX GW N/A 41.61 Historical Khutala Seam-5 U/G Workings 26° 04' 43.00" 29° 00' 37.87"
KLX-B1M KLX GW N/A 13.49
Proposed future monitoring points close to Opencast 26° 07' 09.73" 29° 04' 45.84"
KLX-B2M KLX GW N/A 28.17 Proposed future monitoring points close to Opencast 26° 07' 23.88" 29° 04' 36.05"
KLX-B2S KLX GW N/A 8.36 Proposed future monitoring points close to Opencast 26° 07' 23.99" 29° 04' 35.98"
KLX-B3D KLX GW N/A 30.14 Proposed future monitoring points close to Opencast 26° 07' 14.16" 29° 06' 11.52"
KLX-B3S KLX GW N/A 7.35 Proposed future monitoring points close to Opencast 26° 07' 14.41" 29° 06' 11.48"
KLX-B4M KLX GW N/A 18.39 Proposed future monitoring points close to Opencast 26° 07' 55.92" 29° 06' 00.94"
KLX-B4S KLX GW N/A Proposed future monitoring points close to Opencast 26° 07' 56.06" 29° 06' 00.94"
KLX-B5M KLX GW N/A 10.67 Proposed future monitoring points close to Opencast 26° 08' 20.76" 29° 04' 53.62"
KLX-B6D KLX GW N/A 30.99 Proposed future monitoring points close to Opencast 26° 08' 55.32" 29° 04' 51.78"
Water Monitoring Report for the period: August 2012 – June 2016 for KLX – Project A0520 – Report # JKC_0615
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Site Label Mine Type Sampling
Frequency GW
Levels Description Latitude Longitude
KLX-B6S KLX GW N/A Dry Proposed future monitoring points close to Opencast 26° 08' 55.43" 29° 04' 51.71"
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3.1 Surface water
For the purpose of this report, there are 33 surface water monitoring points included, please
refer to Table 6 for more detailed information with regards to the monitoring points relevant to
the KLX project. These points are then further grouped into three groups namely: Modular Plant
(11 points), MRD’s (11 points) and KLX (11 points). These 33 points are also located over two
different catchments with different RWQO’s, 22 points located within B11F (Witbank Dam
Catchment) and 11 points located within the B20E (Wilge River Catchment).
Comments:
Note that data collected for these surface water monitoring points are for the time
period: August 2012 up to June 2016;
No data was available for the following surface water monitoring points: 1604, 1605 and
7200;
Please refer to Figure 2 and Table 6 for the surface water monitoring map and
coordinates as well as descriptions relevant to the KLX project;
Time Dependent Graphs and surface water data (averages, maximum, minimum and
P95 values are included in Annexure 2;
Surface water monitoring points are also displayed in a map included in Annexure 3.
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Figure 2: Surface water monitoring layout for the KLX project
3.2 Groundwater
In terms of groundwater monitoring points, there are 18 newly drilled boreholes for the KLX
project included in the most recent groundwater study done by Groundwater Square. These
monitoring points include: 8 boreholes drilled into the Seam 5 underground workings to the
West of Block A opencast with the purpose of obtaining mine water levels and qualities (BHUG-
1 to BHUG-8); the other 10 groundwater monitoring points include: KLX – B1M, KLX – B2M,
KLX – B2S, KLX – B3D, KLX – B3S, KLX – B4M, KLX – B4S, KLX – B5M, KLX – B6D and KLX
– B6S.
Comments:
KLX – B6S, BHUG – 2 and BHUG – 7 were noted as dry during time of sampling;
The groundwater compliance map is also included in Annexure 3;
Please refer to Table 10 for groundwater data and Figure 3 for a map indicating the
groundwater monitoring points at KLX;
Note that this data was collected at the end of 2015 as part of the groundwater study.
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Figure 3: Groundwater monitoring layout for the KLX project
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4 COMPLIANCE STATUS
Compliance status as mentioned earlier in the report, will be classified as either compliant or
non-compliant. Surface water is graphically described and represented in Time Dependent
Graphs that were created using data from August 2012 to June 2016 (Annexure 2 and 3). The
Time Dependent Graphs for water quality analyses is comprised of the following components:
pH, Electrical Conductivity (EC), Total Dissolved Salts/Solids (TDS), Sulphate (SO4), Aluminium
(Al), Iron (Fe) and Manganese (Mn).
4.1 Surface water Compliance
Table 7 represents the concentration of Sulphate for the Wilge River Catchment surface water;
the data represented includes the average concentration of Sulphate per monitoring point for
the time period of August 2012 to June 2016. For more detailed data in terms of Time
Dependent Graphs representing other parameters evaluated during water analysis, please
refer to Annexure 2 and Figure 4.
Table 7: Wilge river Sulphate compliance (60mg/l)
Name Description Average SO4
1560 Clean water dam U/S farmers dam
455.59
1562 Farmers dam U/S Block I O/C
265.14
1568 D/S sewage plant
124.18
1615 Northern stream - U/S Block I
296.99
1617 Northern stream - D/S Block I
782.16
1618 D/S Block I after confluence 1615 and 1616
1691.78
1624 Washability plant
66.60
1625 U/S of Main Poll. Contr. dam
120.54
1627 Block I Dam 1
372.86
1628 Block I Dam 2
357.67
1636 KTL7
2397.64
Table 8 represents the average concentration of Sulphate per monitoring point for the Witbank
Dam Catchment surface water.
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Table 8: Witbank Dam Sulphate compliance (500mg/l)
Name Description Average SO4
1553 D/S surface water balance dam 591.65
1600 Block A dam U/s 265.33
1603 Oil separator - before 389.65
1604 D/S final void @ Zondagsvlei -
1605 U/S final void @ Zondagsvlei -
1606 Final void @ Zondagsvlei 2102.90
1611 Block A O/C dam 529.82
1621 Scharrighuisen Pollution Control Dam 1125.47
1622 Sump along the road next to the gate 695.22
1660 Fan 5 Farmers dam 84.03
1661 Ogies farm dam 74.67
1662 Goedgevonden river d/s block A (below 1604) 347.02
7200 -
7201 Dam behind farm dam 878.25
7202 Wetland stream 184.21
7203 Stream 56.40
7204 84.36
7205 136.64
7206 227.00
7207 123.19
7208 62.41
7209 56.43
Comments:
Compliance was assigned in terms of the respective RWQO’s for the different
catchments;
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Table 7 indicates that none of the monitoring points in the Wilge River Catchment were
compliant with the Sulphate limit of 60mg/l. These elevated levels of Sulphate could be
due to the dry season experienced recently;
Table 8 indicates that the majority of the monitoring points in the Witbank Dam
Catchment were compliant with the Sulphate limit of 500mg/l;
Time Dependent Graphs for the Wilge River Catchment indicate spikes in pH (generally
acidic with multiple instances of pH below 4), EC, TDS, Sulphate, Aluminium, Iron and
Manganese;
Time Dependent Graphs for the Witbank Dam Catchment indicate spikes in pH
(generally acidic with multiple instances of pH below 4), EC, TDS, Sulphate, Aluminium,
Iron and Manganese.
Figure 4: Surface water Sulphate compliance map for the KLX project
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4.2 Groundwater Compliance
Table 9 represents the concentration of Sulphate for the groundwater monitoring points
established in the most recent groundwater study conducted by Groundwater Square; the data
represented includes the average concentration of Sulphate per monitoring point. For more
detailed data in terms of other parameters evaluated during water analysis, please refer to
Table 10.
Table 9: Groundwater SO4 compliance
Name Description Average
BHUG-1 Historical Khutala Seam-5 U/G Workings 3.00
BHUG-2 Historical Khutala Seam-5 U/G Workings DRY
BHUG-3 Historical Khutala Seam-5 U/G Workings -
BHUG-4 Historical Khutala Seam-5 U/G Workings 103.00
BHUG-5 Historical Khutala Seam-5 U/G Workings -
BHUG-6 Historical Khutala Seam-5 U/G Workings 20.00
BHUG-7 Historical Khutala Seam-5 U/G Workings DRY
BHUG-8 Historical Khutala Seam-5 U/G Workings 22.00
KLX-B1M Proposed future monitoring points close to Opencast 2.00
KLX-B2M Proposed future monitoring points close to Opencast 5.00
KLX-B2S Proposed future monitoring points close to Opencast -
KLX-B3D Proposed future monitoring points close to Opencast 6.00
KLX-B3S Proposed future monitoring points close to Opencast -
KLX-B4M Proposed future monitoring points close to Opencast 5.00
KLX-B4S Proposed future monitoring points close to Opencast -
KLX-B5M Proposed future monitoring points close to Opencast 5.00
KLX-B6D Proposed future monitoring points close to Opencast 4.00
KLX-B6S Proposed future monitoring points close to Opencast DRY
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Comments:
Please refer to Figure 5 for a visual display of the groundwater compliance of the
groundwater monitoring points tabulated in Table 9;
From Table 9 it can be seen that all of the groundwater monitoring points are compliant
in terms of Sulphate concentration.
Figure 5: Groundwater Sulphate compliance map for the KLX project
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5 GENERAL COMMENTS AND RECOMMENDATIONS
5.1 General Comments
Surface water monitoring points: 1604, 1605 and 7200 had no data for the reporting
period;
Surface water compliance was measured against correlating catchment RWQO’s;
Groundwater monitoring points: BHUG-2, BHUG-7 and KLX-B6S were noted as dry
during the sampling period;
KLX-B2S, KLX-B3S, KLX-B4S and BHUG-3 had no water quality data available, only
water level data which is included in Table 6;
Groundwater compliance was measured against SANS 241-1: 2015.
5.1.1 Surface water
As mentioned earlier, the Wilge River Catchment indicated spikes in: pH, EC, TDS,
Sulphate, Aluminium, Iron and Manganese:
o pH (acidic) spikes were noticed with multiple instances below 4, which is
worrisome due to the fact that Aluminium is pH dependent and at a pH below 4
Aluminium is present in its aqua phase (Al3+) which is highly mobile and toxic to
aquatic biota;
o EC (Electrical Conductivity) and TDS (Total Dissolved Solids/Salts) are
proportional. EC is the ability of water to conduct an electrical current and an
increase in dissolved salts which have the ability to carry a charge consequently
increases EC. EC could also be affected by an ion such as Sulphate which
carries an electrical charge and has an elevated concentration in this instance;
o The elevated levels of Aluminium, Iron and Manganese could be ascribed to
underlying geology such as Sulphide ores (FeS2) which cause elevated levels of
these specific constituents when it oxidises; the process is known as Acid Mine
Drainage (Oxidation of Pyrite (FeS2)).
Time Dependent Graphs for the Witbank Dam Catchment indicate spikes in pH, EC,
TDS, Sulphate, Aluminium, Iron and Manganese:
o pH (acidic) spikes were noticed with multiple instances below 4, which is
worrisome due to the fact that Aluminium is pH dependent and at a pH below 4
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Aluminium is present in its aqua phase (Al3+) which is highly mobile and toxic to
aquatic biota;
o EC (Electrical Conductivity) and TDS (Total Dissolved Solids/Salts) are
proportional. EC is the ability of water to conduct an electrical current and an
increase in dissolved salts which have the ability to carry a charge consequently
increases EC. EC could also be affected by an ion such as Sulphate which
carries an electrical charge and has an elevated concentration in this instance.
The overall Sulphate compliance for the B11F catchment is higher than for the
B20E catchment;
o The elevated levels of Aluminium, Iron and Manganese could be ascribed to
underlying geology such as Sulphide ores (FeS2) which cause elevated levels of
these specific constituents when it oxidises; the process is known as Acid Mine
Drainage (Oxidation of Pyrite (FeS2)).
5.1.2 Groundwater
The groundwater quality results are tabulated in Table 10 below:
Table 10: Groundwater quality results (adapted from: Botha, 2016)
Site Name Date pH EC
(mS/m) TDS
(mg/L) Ca
(mg/L) Mg
(mg/L) Na
(mg/L) K
(mg/L) Cl
(mg/L) SO4
(mg/L) TALK (mg/L)
NO3 (as N) (mg/L)
F (mg/L)
Fe (mg/L)
Mn (mg/L)
Al (mg/L)
1 - Target Level (<) 5.5
2 - Target Level (>) 9.5 150 1000 150 70 200 50 200 400 10.0 1.0 0.20 0.10 0.30 3 - Critical Level (<) 4.0
4 - Critical Level (>) 11.0 370 2400 300 100 400 100 600 600 20.0 1.5 2.00 1.00 0.50 BHUG-1 24-11-2015 7.5 20 110 17 8 6 2 2 3 66 7.0 <0.09 0.01 0.03 0.10
BHUG-4 24-11-2015 7.6 54 314 54 27 20 3 4 103 164 0.9 0.1 <0.01 0.12 0.07
BHUG-6 24-11-2015 7.6 28 150 10 4 40 4 4 20 112 <0.35 0.7 <0.01 <0.01 0.02
BHUG-8 24-11-2015 7.4 55 288 48 19 37 6 4 22 251 <0.35 0.4 <0.01 0.05 0.04
KLX-B1M 17-11-2015 7.0 13 63 9 3 6 3 16 2 32 0.5 <0.09 <0.01 0.07 <0.01
KLX-B2M 17-11-2015 7.4 19 98 22 7 4 4 1 5 92 <0.35 0.2 <0.01 0.05 0.05
KLX-B3D 17-11-2015 7.0 28 145 31 7 13 5 5 6 129 <0.35 0.1 <0.01 0.04 0.09
KLX-B4M 17-11-2015 7.1 29 170 33 6 9 5 5 5 74 13.8 <0.09 <0.01 0.06 0.02
KLX-B5M 17-11-2015 7.1 17 92 16 4 12 3 3 5 75 0.5 0.1 0.01 0.11 0.04
KLX-B6D 17-11-2015 9.0 20 103 11 5 21 3 6 4 88 <0.35 0.1 <0.01 <0.01 0.05
It can be noted from Table 10 above that the groundwater quality at these monitoring
points are of good quality and that the compliance level is very high;
The only spikes noted are Nitrate and Manganese and these concentrations are still at
the target level and have not reached a critical level;
The guidelines against which the groundwater quality results were measured can be
seen in Table 11 below.
Water Monitoring Report for the period: August 2012 – June 2016 for KLX – Project A0520 – Report # JKC_0615
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Table 11: Groundwater quality guidelines
Background water quality
SANS 241 - 2006 Domestic Water SANS 241 - 2015 Domestic Water
Class 1 * Class II ** Limit
pH 6.2-8.6 5 - 9.5 4 - 10 5 – 9.7
EC (mS/m) 20-70 <150 150 - 370 170 (Aesthetic)
TDS (mg/L) 80-400 <1000 1000 - 2400 120 (Aesthetic)
Ca (mg/L) <40 <150 150 - 300
Mg (mg/L) <15 <70 70 - 100
Na (mg/L) <25 <200 200 - 400 200 (Aesthetic)
K (mg/L) <10 <50 50 - 100
Cl (mg/L) <45 <200 200 - 600 300 (Aesthetic)
T.Alk. (mg/L) 10-200
SO4 (mg/L) <50 <400 400 - 600 250 (Aesthetic), 500 (Acute health)
NO3 - N (mg/L) <10 <10 10 - 20 <11 (Acute health)
F (mg/L) <1 <1.0 1.0 - 1.5 1.5 (Chronic health)
Fe (mg/L) <1 < 0.2 0.2 - 2.0 <0.3 (Aesthetic), 2 (Chronic health)
Mn (mg/L) <1 < 0.1 0.1 - 1.0 0.1 (Aesthetic), 0.4 (Chronic health)
Al (mg/L) <0.3 <0.3 0.3-0.5 <0.3 (Operational)
Respectfully submitted,
__________________
Stephan Kitching
Water Monitoring Report for the period: August 2012 – June 2016 for KLX – Project A0520 – Report # JKC_0615
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6 REFERENCES
Department of Water Affairs and Forestry, 1996. South African Water Quality Guidelines.
Volume 7: Aquatic Ecosystems.
Groundwater Square. 2016. Groundwater Impact Assessment as input to the EIA/EMP
Amendment for the KLX Project. Unpublished report done by Groundwater Square for
Khutala Colliery. Reference no.: 185f_Khutala-KLX Project.
Jaco – K Consulting (JKC). 2016. Specialist Surface Water Reports as Input to the EIA for the
KLX Project. Unpublished report done by Jaco – K Consulting for South 32 SA Coal
Holdings (Pty) Ltd. JKC Reference no.: JKC_0580.