KOMATI POWER STATION SHUTDOWN & DISMANTLING DRAFT ENVIRONMENTAL & SOCIAL IMPACT ASSESSMENT REPORT Part II - APPENDICES DRAFT August 2022 KPS Shutdown & Dismantling Draft ESIA Report August 2022 i KPS Shutdown & Dismantling Draft ESIA Report A. TITLE & APPROVAL PAGE Project Name: Komati Power Station Shutdown and Dismantling Draft Environmental and Social Impact Assessment Report – Part II Report Title: Appendices Report Status Draft Client: Eskom Holdings SOC Ltd Prepared By: Nemai Consulting  +27 11 781 1730 147 Bram Fischer Drive,   +27 11 781 1731 FERNDALE, 2194  donavanh@nemai.co.za PO Box 1673, SUNNINGHILL,   www.nemai.co.za 2157 Report Reference: 10756-20220708 R-PRO-REP|20150514 Authors: D Henning, D Naidoo, C Chidley, K Rainford and M Ledwaba This Document is Confidential Intellectual Property of Eskom Holdings SOC Ltd © copyright and all other rights reserved by Eskom Holdings SOC Ltd This document may only be used for its intended purpose August 2022 i B. AMENDMENTS PAGE Date: Nature of Amendment Amendment No. 08/07/2022 Draft for Client Review 0 Updated Draft addressing Comments from Eskom 17/08/2022 1 and the World Bank Updated Draft addressing Comments from the 26/08/2022 2 World Bank KPS Shutdown & Dismantling Draft ESIA Report D. TABLE OF CONTENTS A. TITLE & APPROVAL PAGE I B. AMENDMENTS PAGE II C. EXECUTIVE SUMMARY III D. TABLE OF CONTENTS XIII E. LIST OF ACRONYMS XXXI F. DEFINITION OF KEY TERMS XXXVI 1 INTRODUCTION 2 1.1 Project Background 2 1.2 Project Rationale 3 1.3 Project Timeframes 3 1.4 Scope of Work 3 1.5 Purpose of the Draft ESIA Report 5 1.6 Report Outline 5 1.7 Limitations 6 2 LEGISLATIVE AND INSTITUTIONAL FRAMEWORK 8 2.1 Introduction 8 2.2 World Bank Requirements 8 2.3 International Agreements and Obligations 10 2.4 SA’s Environmental Regulatory Framework 11 2.4.1 Introduction 11 2.4.2 Environmental Legislation 11 2.4.3 Social Legislation 13 2.4.4 Existing Environmental Approvals for KPS 14 August 2022 xiii KPS Shutdown & Dismantling Draft ESIA Report 2.4.5 Environmental Approvals Required for the Project 21 2.5 Legislative Gap Analysis 35 3 PROJECT DESCRIPTION 39 3.1 Introduction 39 3.2 Study Area 39 3.2.1 Geographical Context 39 3.2.2 Property Details & Cadastral Boundaries 42 3.3 Overview of KPS 42 3.3.1 Historical Context 42 3.3.2 Layout 42 3.3.3 Current Operations 42 3.4 Proposed Project 45 3.4.1 Information Sources 45 3.4.2 Decommissioning & Repurposing 45 3.4.3 Decommissioning Activities 50 3.4.4 ADF Options 52 3.4.5 Interrelatedness between Components A & B 56 4 ENVIRONMENTAL & SOCIAL CONTEXT 59 4.1 Introduction 59 4.2 Climate 59 4.3 Geology 61 4.4 Topography 62 4.5 Groundwater 63 4.5.1 Geohydrological Setting 63 4.5.2 Aquifer Characteristics 64 4.5.3 Groundwater Monitoring System at KPS 69 4.5.4 Groundwater Quality 75 August 2022 xiv KPS Shutdown & Dismantling Draft ESIA Report 4.6 Surface Water 95 4.6.1 Hydrological Setting 95 4.6.2 River Class 98 4.6.3 Wetlands 98 4.6.4 DFFE Screening Tool 98 4.6.5 Biomonitoring 101 4.6.6 Water Consumption 102 4.6.7 Storm Water Management & Water Reticulation 103 4.6.8 Surface Water Monitoring System at KPS 107 4.6.9 Surface Water Quality 110 4.7 Soil 118 4.7.1 Soil Types 118 4.7.2 Soils Contamination 119 4.8 Land Use & Land Cover 124 4.9 Air Quality 128 4.9.1 General Description 128 4.9.2 Air Quality Monitoring 132 4.10 Terrestrial Biodiversity 137 4.10.1 Biome and Vegetation Type 137 4.10.2 Mpumalanga Biodiversity Sector Plan & Nkangala Bioregional Plan 140 4.10.3 Site Conditions 142 4.10.4 Management of Invasive Alien Plants 144 4.10.5 Protected Areas 146 4.10.6 Avifauna 146 4.10.7 Screening Biodiversity Study 146 4.10.8 DFFE Screening Tool 150 4.11 Noise & Vibration 150 August 2022 xv KPS Shutdown & Dismantling Draft ESIA Report 4.11.1 General Description 150 4.11.2 Noise Monitoring 150 4.11.3 Vibration 153 4.12 Services 153 4.12.1 Water 153 4.12.2 Sewer 154 4.12.3 Servitudes over KPS property 154 4.13 Heritage & Palaeontology 155 4.13.1 General Description 155 4.13.2 DFFE Screening Tool 155 4.14 Visual Quality 155 4.15 Socio-Economic Environment 156 4.15.1 Policy Review 156 4.15.2 Baseline Profile 156 4.15.3 Local Communities 162 4.15.4 Vulnerable Groups 176 4.15.5 Outcomes of Preliminary Stakeholder Engagement 176 4.16 Transportation 184 4.16.1 Roads 184 4.16.2 Rail 185 4.16.3 Air Transport 187 4.17 Waste 187 4.17.1 Waste Disposal Facilities 187 4.17.2 Waste Assessment 188 4.17.3 KPS Waste Inventory 189 4.17.4 Asbestos 193 4.18 Pollution Sources 193 August 2022 xvi KPS Shutdown & Dismantling Draft ESIA Report 4.19 Land Capability 197 5 POTENTIAL ENVIRONMENTAL & SOCIAL IMPACTS & MITIGATION 200 5.1 Introduction 200 5.2 Predicting Potential Environmental and Social Impacts 200 5.3 Mitigation of Impacts 200 5.4 Environmental and Social Management Objectives of Project 201 5.5 Geohydrology 202 5.5.1 Impact Description 202 5.5.2 Governance 202 5.5.3 Mitigation 203 5.5.4 ESIA Investigations 205 5.6 Surface Water 206 5.6.1 Impact Description 206 5.6.2 Governance 207 5.6.3 Mitigation 207 5.6.4 ESIA Investigations 209 5.7 Soil 209 5.7.1 Impact Description 209 5.7.2 Governance 210 5.7.3 Mitigation 210 5.7.4 ESIA Investigations 212 5.8 Air Quality 213 5.8.1 Impact Description 213 5.8.2 Governance 214 5.8.3 Mitigation 214 5.8.4 ESIA Investigations 215 5.9 Climate 215 August 2022 xvii KPS Shutdown & Dismantling Draft ESIA Report 5.9.1 Impact Description 215 5.9.2 Governance 216 5.9.3 Mitigation 216 5.9.4 ESIA Investigations 216 5.10 ADF 217 5.10.1 Impact Description 217 5.10.2 Governance 218 5.10.3 Mitigation 218 5.10.4 ESIA Investigations 220 5.11 Land Use 220 5.11.1 Impact Description 220 5.11.2 Governance 223 5.11.3 Mitigation 223 5.11.4 ESIA Investigations 223 5.12 Terrestrial Ecology 223 5.12.1 Impact Description 223 5.12.2 Governance 224 5.12.3 Mitigation 225 5.12.4 ESIA Investigations 226 5.13 Visual Quality 226 5.13.1 Impact Description 226 5.13.2 Governance 227 5.13.3 Mitigation 227 5.13.4 ESIA Investigations 228 5.14 Noise & Vibration 228 5.14.1 Impact Description 228 5.14.2 Governance 228 August 2022 xviii KPS Shutdown & Dismantling Draft ESIA Report 5.14.3 Mitigation 228 5.14.4 ESIA Investigations 229 5.15 Waste 229 5.15.1 Impact Description 229 5.15.2 Governance 230 5.15.3 Mitigation 230 5.15.4 ESIA Investigations 240 5.16 Transportation 240 5.16.1 Impact Description 240 5.16.2 Governance 241 5.16.3 Mitigation 241 5.16.4 ESIA Investigations 242 5.17 Socio-Economic & Social Aspects 242 5.17.1 Impact Description 242 5.17.2 Governance 247 5.17.3 Mitigation 248 5.17.4 ESIA Investigations 250 5.18 Heritage 251 5.18.1 Impact Description 251 5.18.2 Governance 251 5.18.3 Mitigation 251 5.18.4 ESIA Investigations 252 5.19 Occupational Health and Safety 252 5.19.1 Impact Description 252 5.19.2 Governance 252 5.19.3 Mitigation 253 5.19.4 ESIA Investigations 259 August 2022 xix KPS Shutdown & Dismantling Draft ESIA Report 5.20 Community Health and Safety 259 5.20.1 Impact Description 259 5.20.2 Governance 260 5.20.3 Mitigation 260 5.21 Cumulative Impacts 267 5.21.1 Introduction 267 5.21.2 Cumulative Impacts between Components A & B 268 5.21.3 Negative Cumulative Impacts 268 5.21.4 Positive Cumulative Impacts 270 5.22 Summary 271 6 ANALYSIS OF ALTERNATIVES 278 6.1 Introduction 278 6.2 Project Alternatives 278 6.2.1 ADF Options 278 6.2.2 Waste Management Options 280 6.2.3 Land Use & End-State Options 281 6.2.4 Repurposing Options 282 6.2.5 Remediation Options 282 6.2.6 No-Go / Without Project Option 282 7 STAKEHOLDER ENGAGEMENT 285 7.1 Introduction 285 7.2 Purpose of the Stakeholder Engagement Plan 285 7.3 Objectives of Stakeholder Engagement 285 7.4 Key Standards and Legislation Guiding Stakeholder Engagement 286 7.4.1 SA Legislative Requirements 286 7.4.2 World Bank Environmental and Social Standards 286 7.5 Stakeholder Identification and Analysis 287 August 2022 xx KPS Shutdown & Dismantling Draft ESIA Report 7.5.1 Stakeholder Identification 287 7.5.2 Stakeholder Categorisation 288 7.5.3 Stakeholder Prioritisation 288 7.6 Approach to Stakeholder Engagement 297 7.6.1 Timing and Approach of Engagement 297 7.6.2 Mitigation Measures for Obstacles to Participation 300 7.6.3 Schedule of Engagement 300 7.6.4 Use of Community Representatives 304 7.7 Stakeholder Communication Protocol 304 7.7.1 Grievance / Feedback Mechanism 304 7.7.2 Response Protocol 305 7.7.3 Documentation Protocol 305 8 PLAN OF STUDY FOR THE FULL ESIA 307 8.1 Introduction 307 8.2 Adherence of Process to Governance Framework 307 8.3 Assessment & Mitigation of Environmental & Social Impacts during ESIA 308 8.4 Feasible Alternatives to be Assessed during ESIA 310 8.5 Specialist Studies 310 8.5.1 Introduction 310 8.5.2 Specialist Studies as part of ESIA’s Scope of Work 311 8.5.3 Technical Investigations 318 8.6 ESMP & Associated Management Plans 319 8.7 Stakeholder Engagement 322 9 REFERENCES 324 August 2022 xxi KPS Shutdown & Dismantling Draft ESIA Report LIST OF TABLES Table 1 Outline of preliminary ESIA Report in relation to ESS1 5 Table 2: Relevance of WBG ESSs to the Project 8 Table 3: SA’s Environmental Regulatory Framework 11 Table 4: Existing Environmental Approvals for KPS 15 Table 5: Listed Activities possibly triggered by the Project in terms of the EIA Listing Notices 22 Table 6: Waste management activities possibly triggered by the Project 26 Table 7: Water uses associated with the Project in terms of Section 21 of the NWA 30 Table 8: Key requirements of ESS and related provisions in national legislation 35 Table 9: Areas to be decommissioned for retiring (removal) vs repurposing 46 Table 10: Decommissioning activities applicable to retiring and repurposing 50 Table 11: Eskom’s groundwater monitoring points at KPS 70 Table 12: Water quality parameters listed within WUL 04/B11B/BCGI/1970 75 Table 13: Ground and Surface Water Hydrochemistry Results Screened against Station’s WUL 85 Table 14: Ground and Surface Water Hydrochemistry Results Screened against Drinking Water Quality Standards (SANS 241:2015) 86 Table 15: Hydrocensus boreholes and their characteristics 93 Table 16: Details of biomonitoring sampling points at KPS 101 Table 17: Summary of water consumption at KPS in 2020/21 102 Table 18: Eskom’s surface water monitoring points at KPS 107 Table 19: Metals Chemical Results Summary – AP02 112 Table 20: Metals Chemical Results Summary – KMR02 113 Table 21: Metals Chemical Results Summary – GLR03 115 Table 22: Metals Chemical Results Summary – GLR04 116 Table 23: Soil sampling sites 119 Table 24: Soil analysis results 119 Table 25: National Ambient Air Quality Limits 133 Table 26: General overview of emissions at KPS 2020/2021 135 August 2022 xxii KPS Shutdown & Dismantling Draft ESIA Report Table 27: Monthly means for the months of January- May 2022 137 Table 28: Number of Exceedances of the National Ambient Air Quality Limits in 2022 137 Table 29: Details of management units 144 Table 30: Listed invasive species found on the KPS property 145 Table 31: Crime statistics for Blinkpan Police Station for 2016/2017 to 2021/2021 161 Table 32: Key statistics for Komati Area 163 Table 33: Komati Village Development Time-Lapse Imagery 164 Table 34: Big House Informal Settlement Development Time-Lapse Imagery 166 Table 35: Broodsnyers Plaas Informal Settlement Development Time-Lapse Imagery 168 Table 36: Gelukplaas 1 Settlement Development Time-Lapse Imagery 169 Table 37: Gelukplaas 2 Settlement Development Time-Lapse Imagery 171 Table 38: Blinkpan Development Time-Lapse Imagery 172 Table 39: Koornfontein Development Time-Lapse Imagery 174 Table 40: Snybroer Plaas Settlement Development Time-Lapse Imagery 176 Table 41: No of Households Surveyed 178 Table 42: Waste disposal facilities within STLM 187 Table 43: KPS Waste Inventory 190 Table 44: Overview of waste types, sources and management measures 232 Table 45: Preliminary OHS control measures 253 Table 46: Preliminary control measures for community health and safety 261 Table 47: Potential negative cumulative impacts associated with the Project 268 Table 48: Potential positive cumulative impacts associated with the Project 270 Table 49: Preliminary summary of potential environmental & social impacts and mitigation 272 Table 50: Preliminary comparison of ADF closure options 279 Table 51: Preliminary comparison of waste management options – non-hazardous waste 280 Table 52: Preliminary comparison of waste management options – hazardous waste 281 Table 53: Preliminary comparison of future land use and end-state options 281 August 2022 xxiii KPS Shutdown & Dismantling Draft ESIA Report Table 54: Stakeholder Identification and Prioritisation 289 Table 55: Factor to be considered in ensuring all stakeholders are identified and consulted 297 Table 56: High Influence/Low Impact Stakeholders 298 Table 57: High Influence / High Impact Stakeholders 298 Table 58: Low Influence / Low Impact Stakeholders 299 Table 59: Low Interest / High Impact Stakeholders 299 Table 60: Obstacles to participation and proposed mitigation measures 300 Table 61: Stakeholder engagement schedule 301 Table 62: Specific ToR for ESIA’s specialist studies 312 Table 63: Environmental and Social Monitoring Programmes 321 August 2022 xxiv KPS Shutdown & Dismantling Draft ESIA Report LIST OF FIGURES Figure 1: Diagrammatic decision-tree for assessment of contaminated land 28 Figure 2: KPS national, provincial and local geographical context 39 Figure 3: KPS regional locality map 40 Figure 4: KPS locality map (topographical map) 41 Figure 5: Map showing cadastral boundaries (orthophotograph) 43 Figure 6: General layout of KPS 44 Figure 7: Power Station Area (Retire vs Repurpose) 47 Figure 8: Ash Dam Area (Retire vs Repurpose) 48 Figure 9: Temporary Structures, Plant and Buildings to demolish and structures to be retained 49 Figure 10: KPS ash dam area 53 Figure 11: Areas identified for PV and BESS installation at KPS 57 Figure 12: Wind rose at KPS monitoring site for all hours 60 Figure 13: Wind rose at KPS monitoring site for day hours (top) and night hours (bottom) 60 Figure 14: Geology Map (Cilliers, 2021) (ash dam perimeter highlighted) 61 Figure 15: SOTER Landforms 62 Figure 16: Current Topography of KPS 63 Figure 17: Cross sectional Conceptual Model 66 Figure 18: Cross sectional Conceptual Model 67 Figure 19:Cross‐Section Illustrating Contaminant Transport 68 Figure 20: Correlation between Surface Topography and the Water Table 69 Figure 21: Eskom’s Groundwater Monitoring Points 72 Figure 22: 10 Additional Groundwater Monitoring Points 73 Figure 23: Combined Eskom and WSP Groundwater Monitoring Points 74 Figure 24: Sampled Groundwater Monitoring Points for the Ash Dams 76 Figure 25: Sampled Groundwater Monitoring Points for the Coal Stockyard 77 Figure 26: Sampled Groundwater Monitoring Points for Komati Village 77 August 2022 xxv KPS Shutdown & Dismantling Draft ESIA Report Figure 27: Chemical Results Summary – AB57 79 Figure 28: Chemical Results Summary – AB53 79 Figure 29 Chemical Results Summary – CB09 80 Figure 30 Chemical Results Summary – PB08 81 Figure 31: Chemical Results Summary – AB04 82 Figure 32: Chemical Results Summary – AB06 83 Figure 33: Location of KPS Hydrocensus Boreholes 94 Figure 34: Quaternary catchment B11B and watercourses in relation to KPS 95 Figure 35: Surface drainage indicating flow directions 96 Figure 36: Topographical map showing watercourses in relation to KPS 97 Figure 37:Wetland types in relation to KPS (National Wetland Map 5) 99 Figure 38: Hydrogeomorphic types of wetlands observed on site 100 Figure 39: Biomonitoring sites for KPS 101 Figure 40: Location of Lake Finn and to Lake Stoffel at KPS 103 Figure 41: Storm water management systems at KPS 105 Figure 42: KPS water reticulation system 106 Figure 43: Eskom Surface Water Monitoring Points 109 Figure 44: Location of monitoring points for surface water analysis 110 Figure 45 Non-Metals Chemical Results Summary – AP02 112 Figure 46 Non-Metals Chemical Results Summary – KMR02 113 Figure 47 Non-Metals Chemical Results Summary – GLR03 114 Figure 48 Non-Metals Chemical Results Summary – GLR04 116 Figure 49: WSP Soil Contamination Monitoring Points 123 Figure 50: Land use at KPS site 125 Figure 51: Photographs of Big House informal settlement 126 Figure 52: Photograph of small informal settlement north-east of the ADF 127 Figure 53: Photographs of dwellings at Geluk Farm viewed from the ADF 127 August 2022 xxvi KPS Shutdown & Dismantling Draft ESIA Report Figure 54: Power stations in NDM (Matimolane, 2021) (KPS pointed out) 129 Figure 55: Area of impact of KPS’ emissions and locations of Rethabile and Vandyksdrif 130 Figure 56: Examples of Receptors near KPS to Air Quality Impacts 131 Figure 57: Air quality monitoring station at KPS 132 Figure 58: Historical trends of NO2 hourly mean concentrations 133 Figure 59: Historical trends of SO2 hourly mean concentrations 134 Figure 60: Historical trends of SO2 daily mean concentrations 134 Figure 61: Historical trends of PM10 daily mean concentrations 134 Figure 62: Historical trends of PM2.5 daily mean concentrations 134 Figure 63: Historical trends of O3 8-hourly moving average concentrations 135 Figure 64: Monthly particulate emissions in tons from KPS for 2021/2022 135 Figure 65: Monthly SO2 emissions in tons from KPS for 2021/2022 136 Figure 66: Monthly NO2 emissions in tons from KPS for 2021/2022 136 Figure 67: Monthly CO2 emissions in tons from KPS for 2021/2022 136 Figure 68: KPS site in relation to vegetation types 139 Figure 69: KPS site in relation to the MBSP 141 Figure 70: Photographs of grassed areas next to HV Yard and eastern cooling towers 142 Figure 71: Photographs of vegetation at ADF 143 Figure 72: Map of management units on land under control of KPS 144 Figure 73: Photographs of the Secondary natural grassland vegetation type at KPS 148 Figure 74:Photographs of the moist grassland vegetation type at KPS 149 Figure 75: Results of noise measurements (dBA) 151 Figure 76: Wastewater treatment plant and water purification facility at KPS 153 Figure 77: View of water treatment plant at KPS 154 Figure 78: KPS IZOI and PSA 159 Figure 79: KPS PSA driving forces & hindering factors 160 Figure 80: Population Centres in the Vicinity of the KPS 162 August 2022 xxvii KPS Shutdown & Dismantling Draft ESIA Report Figure 81: Komati village 163 Figure 82: Big House Informal Settlement 165 Figure 83: Broodsnyers Plaas Informal Settlement 167 Figure 84: Gelukplaas 1 169 Figure 85: Gelukplaas 2 170 Figure 86: Blinkpan 171 Figure 87: Koornfontein 173 Figure 88: Snybroer Plaas 175 Figure 89: Communities Survey with a 5km Radius of KPS 177 Figure 90: South-western view along R35 (KPS visible on right-hand side) 184 Figure 91: Western view along R35 (KPS’ western cooling towers visible on right -hand side) 184 Figure 92: South-eastern view along access road to ADF (KPS on left and ash dam on right) 185 Figure 93: View along gravel road at ADF with KPS in the background 185 Figure 94: Transportation network 186 Figure 95: View of air strip at KPS 187 Figure 96: Pollution sources identified at KPS 194 Figure 97: Coal Stockyard 195 Figure 98: Hazardous substances storage area 195 Figure 99: Lake Stoffel 196 Figure 100: Hazardous waste temporary storage) 196 Figure 101: Fuel station 197 Figure 102: Field crop boundary (DFFE Screening Tool, 2022) 197 Figure 103: Land use and end-state considerations 222 Figure 104: Possible areas to establish temporary waste management facilities 237 Figure 105: Class C Landfill containment barrier design (GN R. 636 of 23 Aug 2013) 238 Figure 106: Summary of economic losses due to KPS shutdown, 2020 prices 243 Figure 107: Populated impact map for KPS shutdown 245 August 2022 xxviii KPS Shutdown & Dismantling Draft ESIA Report Figure 108. National Level Stakeholder Matrix 292 Figure 109. Provincial Level Stakeholder Matrix 293 Figure 110. District Level Stakeholder Matrix 294 Figure 111. Local Level Stakeholder Matrix 295 Figure 112. Other Stakeholder Matrix 296 Figure 113: Outline of S&EIR process 307 Figure 114: Consolidated groundwater and soil sampling points (Eskom, WSP & additional points) 317 August 2022 xxix KPS Shutdown & Dismantling Draft ESIA Report LIST OF APPENDICES Appendix A: Title Deed T24999 Appendix B: Drawings Appendix C: Stakeholders’ Database Appendix D: WSP Methodology for Assessment of Land Contamination at KPS Appendix E: WSP Preliminary Contaminated Land Study Report Appendix F: Groundwater Laboratory Results Review August 2022 xxx KPS Shutdown & Dismantling Draft ESIA Report APPENDIX A TITLE DEED T24999 August 2022 Appendices KPS Shutdown & Dismantling Draft ESIA Report APPENDIX B DRAWINGS August 2022 Appendices KPS Shutdown & Dismantling Draft ESIA Report APPENDIX C STAKEHOLDERS’ DATABASE August 2022 Appendices Organisation Contact Name NATIONAL National Treasury Mining and Environmental Justice community Network of South Africa (MEJCON-SA) Centre for Environmental Rights (CER) The National Union of Mineworkers (NUM) The National Union of Metalworkers of South Africa (NUMSA) The South African Transport and Allied Workers Union (SATAWU) Department of Environmental Affairs (DEA) Department of Employment and Labour (DoEL) Department of Agriculture, Land Reform and Rural Development (DALRRD) Department of Public Enterprise (DPE) Department of Trade, Industry and Competition (DTIC) Department of Mineral Resources and Energy (DMRE) Department of Science and Innovation (DSI) Mineral Council South Africa Alexandra Lugagne Mineral Council South Africa Carla Hudson National Energy Regulator of South Africa (NERSA) Mintek University of Cape Town (UCT) the Impact Catalyst PROVINCIAL Mpumalanga Environmental Youth Network Mpumalanga Green Cluster Agency Mr Nkosinathi Nkonyane Vukani Environmental Justice Movement in Action Thembisile Mbethe Mpumalanga Green Economy Cluster Jack Radmore groundWork Peek Bobby groundWork David Hallowes groundWork Euripidou Rico groundWork Michelle Cruywagen groundWork Robby Mokgalaka groundWork Thomas Mnguni Centre for Environmental Rights (CER) Michell Sithole CER Michelle Koyama CER Linda Dlamini CER Nicole Loser Life After Coal Victor Munnik Eugene Cairncross Mpumalanga Department of Environmental Forestry and Fisheries Suprise Zwane Mpumalanga Department of Economic Development and Tourism Mpumalanga Economic Growth Agency Mpumalanga Tourism and Parks Agency Mpumalanga Heritage Resource Authority Mpumalanga Department of Community Safety, Security and Liaison Mpumalanga Department of Health Mpumalanga Department of Social Development Mpumalanga Department of Human Settlements Mpumalanga Department of Cooperative Governance and Traditional Affairs Office of the Premier DISTRICT Nkangala District Municipality Nkangala District Municipality Ms Margaret Skosana Nkangala District Municipality Mpho Nembilwi Nkangala District Municipality Fikile Maseko Nkangala District Municipality Vusumuzi Kubheka Nkangala District Municipality Johan Mangani Nkangala District Municipality LOCAL Steve Tshwete Local Municipality Steve Tshwete Local Municipality Thokozile Zulu Steve Tshwete Local Municipality Mr L Dolo Steve Tshwete Local Municipality Mr J Silas Steve Tshwete Local Municipality Mr M Nkosi Steve Tshwete Local Municipality Mrs L Legabi Steve Tshwete Local Municipality Ms A Masia Steve Tshwete Local Municipality Mr M Mkhabela Steve Tshwete Local Municipality Mr M Mahamba Steve Tshwete Local Municipality Ms D Lambrechts Middleburg Environmental Justice Network Hlatshwayo Bafana Middleburg Environmental Justice Network Sibande Bernard Greater Middleburg Residents Association Mnguni Thomas Greater Middelburg Housing Association Middelburg Collective Unemployment Forum Walter Sunboy Thombeni Middelburg Chamber of Commerce and Industry Anna-Marth Ott Ward Ward 4 Edward Mgevu Nyambi Ward 6 Zulu Sizwe Wonderboy Komati Town / Koornfontein Village Villa Rosa Ms Alta de Bruin OK Komati Mr Ambrosia de Silva Laerskool Koornfontein (school) Mr Christo Gteef Meisie Club Church Aaron Runeyi Pieter de Jager Elmien Home Based care Georgina Community Police Forum Georgina Business Forum Georgina Chiel BL Georgina James Lakama Alfred Mlongo Tshepiso Molefe Kamiti Sipho Motshweni P Chauke Z Msimba Ruanda Organisation Contact Name Blinkpan A Van Niekerk Kobus van Wyk DGP Kruger SAPS Blinkpan Sipho Mgwena NG Blink Taljaard Rene Linda Mothoa Islardu Boerdery Ronel Bekker Ester Masina Yolandi Vos Esthe Nieuwoud Jeff Emslie Nyambi Bongefille Klaas Radingwane Masilela Thokozani Solomon Mahlangu Bernard w Bester Bokkie Scheepers Secretary: Blinkpan Agricultural Association Johan Swanepoel Goedehoop / Hope Banks Collieries Sizanane Broodsnyersplaas Farm JM de Beer Boerdery / Broodsnyersplaas J M de Beer JM de Beer Boerdery / Broodsnyersplaas Elma Broodsnyersplaas Farm (informal settlement) Broodsnyersplaas Jonas Zulu Broodsnyersplaas James Rampora Broodsnyersplaas Mulungisi Mazibuko Broodsnyersplaas Ngenangani Sibiya Broodsnyersplaas Sfiso Simelane Broodsnyersplaas Bongani Mthembu Gelukplaas 1st Farm (informal settlement) Abraham Khumalo Vincent Khumalo Emma Khumalo Gelukplaas 2nd Farm (informal settlement) Daniel Khumalo Big House' (informal settlement) Senzo Vilani Themba Mashiloane Daniel Mahlwele Veluso Malahle Sibongiseni Jwara Isaab Nhlapo Maphakisa Tladi Nomsa Dlamini Abraham Mashiloane Amos Khoza Mako Malebo Moses Makhubela Mveliso Malahle Mr SS Bambo Sibusiso Thwala Anele Hoga Lihle Mjoli Thakasani Zulu ThembiNkosi Silombo Aron Mdoda Boy A Vilane Cliford L Timane Moses Ntuli S.S Ndzukula Klaas Motsweni Aaron Runegi Schoeman Farm (informal settlement) Absalom Nkosi Snybroerplaas / Vlakplaas (informal settlement) Paulus Molefe Farm Belt Farm Belt Community Economic Development Structure Thulisani Nkosi KPS Shutdown & Dismantling Draft ESIA Report APPENDIX D WSP METHODOLOGY FOR ASSESSMENT OF LAND CONTAMINATION AT KPS August 2022 Appendices 17 May 2022 CONFIDENTIAL Eskom Holdings SOC Limited Komati Power Station Mpumalanga Province Dear Madam/Sir: Subject: Proposed Methodology for the Assessment of Land Contamination at Eskom's Komati Power Station Eskom Holdings SOC Limited (Eskom) requires an independent environmental consultant, WSP Group Africa (Pty) Ltd, to undertake the Environmental & Social Impact Assessment (ESIA) and Water Use Licence Application (WULA) processes for the Solar Photovoltaics (PV) and Battery Energy Storage System (BESS) project at Komati Power Station, located in the Mpumalanga Province of South Africa. The ESIA and WULA require specialist studies to support the applications which includes a contaminated land study to cover the soil and groundwater assessment requirements. The proposed methodology for the contaminated land assessment is in the context of Part 8 of the National Environmental Management: Waste Act (NEM: WA) and in general accordance with the requirements of the South African Framework for the Management of Contaminated Land (May 2010). The proposed scope comprises the completion of preliminary Phase 1 and Phase 2 Site Assessments which are detailed below: Phase 1 Site Assessment: A preliminary Phase 1 Site Assessment will include the following: — A detailed desktop exercise to evaluate the site’s environmental setting and sensitivity, as well as to review any information provided by Eskom relating to previous environmental site assessments conducted at the facility. — A site walkover exercise to evaluate all potential sources of environmental liability brought about by current and historic operations (if applicable) at the facility. — The site walkover will also seek to identify suitably accessible sampling locations and potential access and safety risks associated with the use of mechanical equipment (i.e., concrete corers, drilling rigs) to inform the planning of subsequent intrusive works more reliably. — The Phase 1 Site Assessment will allow targeted soil and groundwater sampling to be completed under a preliminary Phase 2 Site Assessment, thereby, limiting the extent of works, timeframes and associated cost required to develop an accurate environmental baseline of the facility. Phase 2 Site Assessment: A preliminary soil and groundwater assessment will include the following: — The clearance of all intrusive positions which will be carried out by a specialist subcontractor using a Cable Avoidance Tool (CAT) and/or Ground Penetrating Radar (GPR) in consultation with site personnel, available service plans, and under the supervision of WSP. — The advancement of twenty-five auger holes (to a maximum depth of 2 metres below ground level, ground permitting) which will be undertaken to define any possible shallow soil source zone/s of concern more comprehensively; specifically, in areas where Building C Knightsbridge, 33 Sloane Street Bryanston, 2191 South Africa wsp.com WSP Group Africa (Pty) Ltd. WSP is an ISO9001:2015, ISO14001:2015 and OHSAS18001:2007 certified company substantial contamination may have been brought by historic and/or current site activities. The profile of all auger holes will be logged, and observations of soil conditions will be recorded, and twenty-five soil samples (one per auger hole) will be taken for laboratory testing according to applicable protocols for analysis. — Based on the information from the Phase 1 Site Assessment and taking cognisance of the soil conditions observed, ten targeted positions will be confirmed for the advancement of boreholes and installation of ten monitoring wells up to a maximum depth of 10 metres below ground level. Furthermore, soil samples will be collected (one per borehole) during the borehole advancement exercise and samples will be selected on the basis of the observed levels of contamination within the soil horizons. — Upon completion of well installation, a specialist surveyor will be appointed to coordinate each of the well positions to evaluate groundwater flow direction/s and hydraulic gradient/s using the groundwater monitoring data that will be collected alongside any existing information as provided by Eskom. — Allowing a period of stabilisation of the wells, groundwater monitoring will be carried out at all newly installed wells and a total of eleven groundwater samples (including one sample for verification purposes) will be taken according to applicable protocols for sampling and analysis. — Groundwater samples will be laboratory tested as per the GN R.331 suite as a minimum, which includes the following parameters for groundwater: arsenic, cadmium, chromium, iron, lead, mercury, nickel, selenium, manganese, zinc, polychlorinated biphenyls, polycyclic aromatic hydrocarbon, BTEX (benzene, toluene, ethyl benzene, xylene), iron, nickel, chromium, and zinc. The laboratory suite for soil samples that will be analysed for will include metals, organics and anions which are in accordance with the applicable soil screening criteria (the South African Soil Screening Values). — Following completion of fieldwork and upon receipt of laboratory analytical results, WSP will prepare a combined factual and interpretative report describing the works undertaken and presenting the results obtained. A conceptual site model (CSM) will be developed based on the findings of the works, clarifying exposure pathways to the identified on- and off-site receptors via applicable transport mechanisms and particularly associated with geological and hydrogeological conditions, and based on the future land-use for the site. Subsequently, a site-specific human health and environmental risk assessment will be performed based on the potential exposure pathways/pollutant linkages highlighted by the CSM. The outcomes of the report will include identifying whether the identified risks associated with the land contamination are considered significant; outlining the recommendations for further works associated with the delineation of the contamination where required; as well as identifying plausible remedial requirements or corrective actions where necessary. I trust that the methodology outlined for the contamination assessment aspect of the project is deemed appropriate for the purposes of the project. Kind regards, Nomalungelo Nyoka Contaminated Land Specialist, WSP Group Africa (Pty) Ltd Page 2 KPS Shutdown & Dismantling Draft ESIA Report APPENDIX E WSP PRELIMINARY CONTAMINATED LAND STUDY REPORT August 2022 Appendices ESKOM HOLDINGS SOC LTD ESKOM KOMATI POWER STATION ESIA AND WULA PRELIMINARY CONTAMINATED LAND STUDY 21 JULY 2022 CONFIDENTIAL ESKOM KOMATI POWER STATION ESIA AND WULA PRELIMINARY CONTAMINATED LAND STUDY ESKOM HOLDINGS SOC LTD CONFIDENTIAL PROJECT NO.: 41103965 DATE: JULY 2022 WSP BUILDING C, KNIGHTSBRIDGE 33 SLOANE STREET BRYANSTON, 2191 SOUTH AFRICA T: +27 11 361 1300 F: +27 11 361 1301 WSP.COM WSP Group Africa (Pty) Ltd. | Registered Address: Building C, Knightsbridge, 33 Sloane Street, Bryanston, 2191, South Africa | Reg No. 1999/008928/07 QUALITY MANAGEMENT ISSUE/REVISION FIRST ISSUE REVISION 1 REVISION 2 REVISION 3 Remarks Draft for Comment Date July 2022 Prepared by Sarah Skinner Digitally signed by Skinner, Sarah Signature Skinner, Sarah (gld_SaSkinner) DN: cn=Skinner, Sarah (gld_SaSkinner), ou=Users, email=sarah.skinner@wsp.com (gld_SaSkinner) Reason: Author Location: Midrand Date: 2022.07.22 09:02:24 +02'00' Checked by Adam Sanderson Signature Authorised by Adam Sanderson Signature Project number 41103965-006 Report number R01 File reference 41103965_Eskom KPS ESIA and WULA_Preliminary Contaminated Land Study_2022- 07-22 WSP is an ISO9001:2015, ISO14001:2015 and OHSAS18001:2007 certified company SIGNATURES PREPARED BY Digitally signed by Skinner, Sarah (gld_SaSkinner) Skinner, Sarah DN: cn=Skinner, Sarah (gld_SaSkinner), ou=Users, email=sarah.skinner@wsp.com (gld_SaSkinner) Reason: Author Location: Midrand Date: 2022.07.22 09:06:29 +02'00' Sarah J.W. Skinner Principal Hydrogeologist REVIEWED BY Adam Sanderson Director This report was prepared by WSP for the account of Eskom Holdings SOC Ltd, in accordance with the professional services agreement. The disclosure of any information contained in this report is the sole responsibility of the intended recipient. The material in it reflects WSP’s best judgement in light of the information available to it at the time of preparation. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. WSP accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. This limitations statement is considered part of this report. The original of the technology-based document sent herewith has been authenticated and will be retained by WSP for a minimum of ten years. Since the file transmitted is now out of WSP’s control and its integrity can no longer be ensured, no guarantee may be given to by any modifications to be made to this document. The Eskom Komati Power Station has been designated as a National Key Point. This document, and those referenced during its preparation, are strictly confidential. Further, information contained in this report pertains to a site designated as National Key Point and, therefore, the exchange and storage of information must comply with the National Key Points Act, 1980. 1 INTRODUCTION ........................................ 1 TABLE OF 1.1 Authorisation ........................................................ 1 CONTENTS 1.2 Background and Proposed Development............ 1 1.3 Aims and Objectives............................................. 2 1.4 Referenced Documents ........................................ 2 1.5 Scope of Work and Limitations ............................ 3 2 SETTING .................................................... 4 2.1 Geography ............................................................ 4 2.2 Environmental ....................................................... 6 3 CONCEPTUAL SITE MODEL .................... 9 3.1 Possible Sources ................................................ 10 3.2 Key Receptors .................................................... 10 3.3 Potential Pathways ............................................. 11 4 CURRENT INVESTIGATION ................... 13 4.1 Fieldwork............................................................. 13 4.2 Laboratory Analysis ........................................... 14 5 GROUND AND GROUNDWATER CONDITIONS ........................................... 15 5.1 Soils .................................................................... 15 5.2 Groundwater ....................................................... 15 5.3 Contamination Observations ............................. 16 6 SOIL RESULTS........................................ 17 6.1 Initial Screening .................................................. 17 6.2 Further Screening ............................................... 18 7 GROUNDWATER RESULTS ................... 19 7.1 Quality Control – Duplicate Sample ................... 19 7.2 Discussion .......................................................... 20 Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd 8 CONCLUSIONS ....................................... 21 TABLES TABLE 1 – SITE SUMMARY ................................... 4 TABLE 2 – PROPOSED DEVELOPMENT AREAS .. 5 TABLE 3 – LITHOSTRATIGRAPHY ........................ 7 TABLE 4 – HYDROCENSUS BOREHOLES ............ 9 TABLE 5 – GROUNDWATER MONITORING DATA (06 JUNE 2022) .......................... 14 TABLE 6 – RELATIVE PERCENTAGE DIFFERENCES BH03 (ORIGINAL) VERSUS BH10-01 (DUPLICATE) ................................................... 19 FIGURES FIGURE A – CORRELATION: TOPOGRAPHY VERSUS GROUNDWATER ELEVATION ............................... 16 APPENDICES A FIGURES B BACKGROUND GROUNDWATER QUALITY C SERVICE CLEARANCE REPORT D EXPLORATORY HOLE LOGS E CERTIFICATES OF ANALYSIS Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd 1 INTRODUCTION 1.1 AUTHORISATION WSP Group Africa (Pty) Ltd (WSP) was commissioned by Eskom Holdings SOC Limited (Eskom) to undertake a preliminary contamination assessment for targeted portions of its Komati Power Station (KPS) facility in Mpumalanga Province, South Africa. The contamination assessment forms part of the Environmental & Social Impact Assessment (ESIA) and Water Use License Application (WULA) processes for the Solar Photovoltaics (PV) and Battery Energy Storage System (BESS) Project. The offer to carry out the works was contained in WSP proposal reference 41103965, Eskom Komati PV ESIA and WULA, dated April 2022 and was commissioned by Eskom under Purchase Order No. 4503194444 for Contract No. 4600062770. 1.2 BACKGROUND AND PROPOSED DEVELOPMENT KPS was initially commissioned in 1961 and originally operated until 1990. The power station was mothballed in 1990 but was returned to full service in December 2008 (VPC, 2021). The station has a total of nine units, five 100 MW units on the east (Units 1 to 5) and four 125 MW units on the west (Units 6 to 9), with a total installed capacity of 1,000 MW (1 GW). KPS will reach its end-of-life expectancy in September 2022 when the remaining unit (Unit 9) will have reached its dead stop date (DSD), with eight units (Unit 1 to 8) having have already reached their DSDs. Eskom is proposing the establishment of a solar electricity generating facility and associated infrastructure as part of its repurposing programme for KPS. The plan is to install 100 MW of solar PV and 150 MW of BESS. The proposed development is located within the property owned by Eskom termed the study area for reporting purposes. The proposed development includes two sites for the solar PV installation (PV Site A and PV Site B) and four for the BESS (BESS A, B, C and D) located within the KPS as shown in Appendix A: Figure 1. The solar PV modules, which convert solar radiation directly into electricity, will occupy a space of up to approximately 720,000 m2 over a footprint of around 200 to 250 ha. The modules will be elevated above the ground and will be mounted on either fixed tilt systems or tracking systems (comprised of galvanised steel and aluminium). The modules will be placed in rows in such a way that there is allowance for both perimeter and maintenance access roads. The main components of the BESS include the batteries, power conversion system and transformer which will all be stored in various rows of containers. The BESS components will arrive on site pre-assembled. The BESS facilities are likely to include lithium battery technologies, such as lithium iron phosphate (LiFePO4), lithium nickel manganese cobalt oxides (Li-NMC) or vanadium redox (VRB), however the specific technology will only be determined following Engineering, Procurement and Construction (EPC) procurement. The BESS footprints will range from roughly 2 ha up to 6 ha. Further information on the proposed infrastructure and specifications are provided in the ESIA report. 1.2.1 EXISTING AUTHORISATIONS AND LICENCES Eskom has two existing Water Use Licences (WUL) with amendments obtained in August 2017 and February 2021 as follows: 1 WUL number 04/B11B/BCGI/1970 dated 2 February 2014 authorises the following water uses for the Eskom property located within the farm Komati Power Station No 56 IS: a Abstraction of water from the Komati Government Water Scheme (Section 21 b) b Diversion and impedances of the Koringspruit (Section 21 c and i) c Storage of water in the raw water dams (Section 21 b) and d Storage of waste and wastewater including the coal stockyard (BESS D), ash dams and return water dam associated with the Ashing Area (Section 21 g) Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 1 This WUL includes water quality limits for surface water (Appendix III, Table 3) and groundwater reserve (Appendix IV, Table 6). Table 3 was revised in the August 2017 amendment whilst the amendment of February 2021 includes changes to frequency of monitoring. 2 WUL number 04/B11B/CI/2556 dated 11 January 2015 refers to construction of Komati storage facility within 500 m from a boundary of an unchanneled valley bottom wetland and seepage wetland which refers, based on the coordinates provided, to the Komati Spruit (Seep 2 wetland) In addition to the above WUL, Eskom possesses the following two Waste Management Licences (WML): 1 KPS Ash Disposal facility (License #: 12/9/11/L1010/6) 2 Decommissioning of the asbestos disposal site within the Old Ash dam (License #12/9/11/L73467/6) 1.3 AIMS AND OBJECTIVES The objective of the preliminary contamination assessment is to provide a review of available existing information and present the findings of the contemporary works. The aim of this report is therefore to: — Establish the environmental setting/s of the relevant development areas at KPS based on a review of existing information in conjunction with site reconnaissance, targeted intrusive investigations and laboratory analysis of selected samples — Prepare a Conceptual Site Model (CSM) utilising the supplementary information to conceptualise the hydrological, geological and hydrogeological conditions in respect to possible contamination concerns — Interpret the significance of recorded contamination impacts in broad accordance with Part 8 of the NEM: WA to ascertain the requirement for additional works and/or remediation 1.4 REFERENCED DOCUMENTS The chronological list of the documents and data sources which informed the desktop review are provided below and are referenced where appropriate in this report. This information includes reports and databases provided by Eskom with additional input from various published resources. — Bohlweki Environmental, September 2005, Single page (Figure 10) showing the undermining areas, subsidence and rehabilitation ash dump referenced to the Koornfontein Mines EMPR and originally titled Plan No. 4.5. — GHT Consulting, July 2009, Komati Power Station Hydrological & geohydrological baseline study, GHT Consulting Scientists, RVN 537.5/909. — Lidwala, December 2015, Integrated water and waste management plan for Komati Power Station, Mpumalanga Province, Lidwala Consulting Engineers (SA) (PTY) Ltd, 16906 PROS_ENV — Kimopax, September 2019, Numerical modelling and geochemistry assessment, Eskom Komati Power Station, Gauteng, Kimopax (Pty) Ltd, KIM-WAT-2018-233 — Eskom, August 2019, Komati Hydrocensus Report - 2019, Applied chemistry and microbiology section: sustainability Division Eskom, RTD/ACM/19/240-149029270 — Eskom, Oct 2017, Komati Surface and Groundwater Monitoring Report, Phase 4, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/17/04. — Eskom, Oct 2017, Komati Surface and Groundwater Monitoring Report, Phase 3, Eskom Sustainability Division, Research, Testing and Development Technical report. RTD/ACM/16/240-118739170 — Eskom, April 2016, Komati Surface and Groundwater Monitoring Report, Phase 01, Eskom Sustainability Division, Research, Testing and Development Technical report, 240-112294332 — Eskom, January 2017, Komati Surface and Groundwater Monitoring Report, Phase 02, Eskom Sustainability Division, Research, Testing and Development Technical report, Rrtm/acm/16/240- 118739170 — Eskom, April 2018, Komati Surface and Groundwater Monitoring Report, Phase 5, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/17/05 Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 2 — Eskom, May 2018, Komati Surface and Groundwater Monitoring Report, Phase 6, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/17/06 — Eskom, May 2018, Komati Surface and Groundwater Monitoring Report, Phase 7, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/18/240-140434399 — Eskom, August 2018, Komati Surface and Groundwater Monitoring Report, Phase 8, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/18/240-140434709. (Mathetsa, S & Swartz, N) — Eskom, September 2019, Komati Surface and Groundwater Monitoring Report, April to June 2019, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/19/240- 150762666 (Authors Mathetsa, S & Swartz, N) — Eskom, September 2019, Komati Surface and Groundwater Monitoring Report, July to September 2019, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/19/240- 152749979 (Authors Mathetsa, S & Swartz, N) — Eskom, May 2020, Komati Surface and Groundwater Monitoring Annual Report, 2020/2021, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/20/240- 163860231 — Eskom, January 2021, Komati Surface and Groundwater Monitoring - Quarter 3, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/21/240-1615539477 — VPC, October 2021, Draft Report for Komati Thermal Power Plant Technical Analyses on retiring and repurposing four coal plants, South Africa. Report for the World Bank, VPC GmbH. P-2021-00547. — Eskom, March 2022, Komati Surface and Groundwater Monitoring - Quarter 3, Eskom Sustainability Division, Research, Testing and Development Technical report, RTD/ACM/21/240-190000008 — SRK Consulting, March 2021, Independent Competent Person’s Report on Goedehoop Colliery, SRK Report reference 566657. https://thungela.s3.eu-west-1.amazonaws.com/downloads/investors/Goedehoop- Colliery-CPR-dated-25-March-2021.pdf. — Eskom, 2022, Komati Wish_August 2021 water quality databased received on the 15 June 2022 — Eskom, 2022, Discussion on site infrastructure and existing activities with the Eskom Environmental Manager on the 07 July 2022 1.5 SCOPE OF WORK AND LIMITATIONS This document comprises factual and interpretative reporting based on the findings of the contemporary ground investigations and incorporating available pertinent existing data. The works reported herein are focused on environmental issues pertaining to the defined aims and objectives, and with respect to the targeted areas at KPS only. The study specifically excludes geotechnical considerations. The preliminary risk assessment is based on potential source-pathway-receptor linkages (exposure pathways) applicable under specific land-use assumptions. Should the source-pathway-receptor linkages be altered, or the applicable land-use/s change, re-assessment may be necessary as the outcomes of the current assessment may no longer be valid. Moreover, the limitations associated with the finite nature of the intrusive works conducted should be recognised and the presence of other areas of impact that have not been identified during the current scope cannot be discounted. The preliminary quantification exercise has been conducted in targeted areas only and more detailed works will likely be necessary to validate the findings. Whilst broadly complying with Part 8 of the NEM: WA, the report does not constitute a Site Assessment Report (SAR) as described thereunder. Based on WSP’s experience it is almost certain that the Department of Forestry, Fisheries and the Environment (DFFE) would require consideration of the entire KPS under a single SAR. Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 3 2 SETTING 2.1 GEOGRAPHY While the works related to this document focussed on the proposed development areas only, these form part of the consolidated Eskom property as presented in Appendix A: Figure 1 and Figure 2 within the KPS 56 IS farm portion. A summary of the general information is provided in Table 1 with additional information specific to the proposed development in Table 2. The localities of current and historical activities are presented on Appendix A: Figure 2. Table 1 – Site Summary Site Name Eskom Komati Power Station Address R35, Emalahleni, 1034, South Africa, Witbank, Mpumalanga, 1034 Province Mpumalanga Municipality Steve Tshwete Municipality Current Owner Eskom (Title Deed No. T24999/1975) Location Summary KPS is situated about 37 km from Middelburg, 43 km from Bethal and 40 km from Witbank. The proposed PV Solar Sites (A and B) are located to the west of the farm portion in vacant open grasslands whilst the proposed BESS areas are located within the KPS footprint. Current Use KPS is a coal power station which includes eight cooling towers, coal stock yard, fuel depot, oil storage, mechanical and electrical equipment, distribution stations, contractors’ yards and a series of ash dams and return water dams (RWD) (termed the Ashing Area). A water treatment plant (WTP) to treat water to potable quality is located within the KPS. The PV Sites A and B are vacant separated by an Eskom servitude. Komati Town is a residential area located between the KPS and PV Site B. Size The consolidated land belonging to Eskom covers approximately 686.95 ha (VPC, 2021), with KPS covering about 315 ha. Brief History As previously stated, the KPS was commissioned in 1961 and operated until 1990 before being mothballed until it was returned to full service in 2008. Eskom personnel had limited information on the history of the dams and waste site. An indication has therefore been obtained based on the historical GoogleTM imagery where the earliest image is from 1985 (poor resolution) and subsequently for 2009 to 2022. The old ash dumps are unlined and were larger, including the historical ash dump footprint now rehabilitated within PV Site A. There were no records provided as to when this was rehabilitated but the footprint is shown in 1985 and not in the subsequent image from 2009. The footprint for the new lined ash dams first appears in 2011 with the lining in place from around 2015. Inference is made to a possible domestic waste site in an area adjacent to the historical ash dump footprint but the extent and detail for this site is not known and it is not clear on the historical imagery. An asbestos disposal site (License #12/9/11/L73467/6) was utilised for the disposal of 4,050 kg of asbestos and asbestos containing waste in 2008 and was covered with two layers of ash and fenced. VPC, 2021 notes that Ergosaf Environmental and Occupational Health Services confirmed that there was no environmental risk of the disposed asbestos in 2013. All asbestos material has been removed off site. A rehabilitated ash dump is noted as being present in the north-west corner of PV Site B. This is in evidence in 1985 but not in 1990. This area is also noted by Bohlweki Environmental, 2005 to have been undermined with some subsidence noted as having occurred within this area. Eskom has confirmed that there are no underground storage tanks, but fuel storage areas are present in mobile tanks and at the fuel depot and there is a fuel transfer station located south of the coal stockyard. Potential contaminant areas have been identified at the coal stockyard, bulk chemical store (located in the vicinity of the Water treatment plan), Lake Stoffel, Lake Finn, Hazardous Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 4 Waste Temporary storage (possibly in the vicinity of BESS C), Ashing Area and the historical asbestos disposal area (VPS, 2021). VPS note that limited soil testing (pH, electrical conductivity, calcium, magnesium, sodium, potassium, chloride, nitrate, aluminium, manganese and iron) was carried out to assess the impact of dust suppression near Ashing area, the coal stockyard and water treatment facilities in October 2020. Manganese was found to be elevated in the samples near the Ashing and coal stock yard area. Contaminants of Eskom identified the CoPC to include arsenic, cadmium, chromium, iron, lead, mercury, Potential Concern nickel, selenium, manganese, and zinc from the ash and coal storage areas; polychlorinated (CoPC) biphenyls (PCB), polycyclic aromatic hydrocarbon (PAH), benzene, toluene, ethylbenzene, and xylene (BTEX), and other petroleum hydrocarbons from oil storage and mechanical and electrical equipment; and copper, iron, nickel, chromium and zinc from metal cleaning and cooling tower blowdown wastewaters. Table 2 – Proposed Development Areas Area Approximate Size (ha) Locality and Current Use Centre Point Coordinates PV Site A 26° 6' 22.61" S 160.6 Southwest corner of the site with the R542 to the south, Komati town to 29° 27' 41.63" E the north, the Goedehoop Colliery (an underground coal mine) to the northwest, and the Eskom Komati Ashing Area to the east. Much of the area was historically a farm, (maize/corn rotated with bean crops). The historical ash and rehabilitated domestic waste footprints are in the eastern portion of the area. PV Site B 26° 5' 45.17" S 60.9 Northwest corner of the site with Goedehoop Colliery to the west and 29° 27' 15.52" E north, and Komati town to the east. The Blinkpan police station is located on the south-western boundary. This area is not in use but undermining and a rehabilitated ash dump are noted to have been present in the northwest of this area. A landing strip / road crosses the area upslope of the rehabilitated dump. BESS A 26° 5' 27.74" S 2.6 Southwest portion of the KPS. Area is currently in use with several 29° 28' 8.22" E buildings and contractor’s yards (D.B Thermal, Alstom Howden, Siemens, Clyde Bergeman, Roshcon EL and Roshcon Storage) as well as offices, parking areas and a boiler within the proposed development footprint. According to the site layout plan (Eskom) the distribution station is located to the east, with the KPS cooling towers and various buildings and parking areas to the north. BESS B 26° 5' 33.34" S 3.2 The site is bounded by the Komati spruit (and wetland area) to the west 29° 28' 2.59" E and KPS (BESS A) to the northeast. Most of the area is not in use except for a church located in the south-eastern corner. There is no evidence of a graveyard, but this should be confirmed with Eskom. The church is located within a bunker which was historically an old shooting range. BESS C 26° 5' 30.92" S 2 Site is bounded to the west by the KPS cooling towers and the drainage 29° 28' 35.13" E line of the Gelukspruit (and wetland) to the northeast. The Ashing Area is located to the south. Much of the area is currently not in use but there is a scrap yard in the southern portion. Eskom noted in discussion that an unknown fenced off area was leased to an unknown subcontractor. Based on the map provided by VPS, 2021 this may have been the temporary hazardous waste storage area. BESS D 26° 5' 14.90" S 5.6 Site is the coal stockyard currently in use by KPS. 29° 28' 17.13" E Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 5 2.2 ENVIRONMENTAL 2.2.1 TOPOGRAPHY Topographic information was sourced from the 1:50 000 topographic map series, (Eskom, 2021 and Eskom, 2019) and is presented in Appendix A: Figure 3. The topography is undulating with the highest point near the junction of the R35 and R542 provincial roads (south-eastern corner) at approximately 1,655 metres above mean sea level (mamsl). The topography slopes in a northerly direction to 1,600 mamsl on the northern boundary (PV Site B and KPS). 2.2.2 HYDROLOGY KPS is in the upper Olifants River quaternary sub-catchment, B11B. The Koringspruit flows some 700 m to the north. The Koringspruit also passes the Koornfontein and Goedehoop Coal mines (downstream of the KPS), eventually flowing into the Koornfontein River and ultimately joining the Olifants River some 15 km downstream. The Komati spruit is a small drainage line in the centre of the site and drains the area western portion of the Ashing Area to the Koringspruit River via dams located within the municipal sewage plant located external to the site boundary. The Gelukspruit (a tributary of the Koringspruit River) flows in a north-westerly direction to the east of the KPS. According to Eskom, 2019; this stream was diverted to prevent ingress into power plant areas and remains so due to the location of the current KPS activities. Dirty water from the Ashing Area, KPS and coal stockyard area drain to the Stoffel Dam, (VPS, 2021). Finn Dam is located downstream on the north-eastern corner of the KPS and receives water from the coal stockyard (Appendix A: Figure 2). SENSITIVE AQUATIC RECEPTORS The study area is highly developed and water resources and dams have been altered by the mining and existing activities at the KPS. There are no wetland sites of national importance in the immediate area, but four wetlands were identified during the aquatic ecology study carried out by WSP1 in June 2022 for the ESIA. These include: — A channel valley bottom associated with the Gelukspruit located to the east of the KPS. — Seep 1 is located on the southern boundary. The small dam (termed the Clean Water Dam) is located downstream of the seep and impounds and pools the water in the wetland. — Seep 2 is associated with the Komati spruit. It originates downstream of the Clean Water Dam and receives water from the Ashing Area. Seep 2 is bordered by the Komati village to the west. — A shallow depression wetland is located within a crop field south and external to PV Site A. The wetland is approximately 3 ha in extent and is cut off from PV Site A by the tarred R542 road. These wetlands were considered “Largely Modified” in terms of their Present Ecological State and are of low/marginal ecological importance. The channelled valley bottom wetland was however assessed as being moderate in terms of its Ecological Importance and Sensitivity as well as in terms of ecosystem services on account of biodiversity maintenance. No areas of potentially Critical Habitat, as defined by International Finance Corporation and World Bank standards, have been identified within the study area. The location of the wetlands is provided on Appendix A: Figure 2. 1 Golder Associates Africa (Pty) Ltd, a member of WSP (Pty) Limited, June 2022, Draft Aquatic ecology study for the Eskom Komati Power Station, Report No 22521869-352949-22, June 2022 Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 6 2.2.3 GEOLOGY REGIONAL Eskom KPS is located within the Highveld (Witbank) Coalfield. The regional geology is described (Eskom, 2021, Kimopax, 2019) as falling within the Carboniferous to early Jurassic aged Karoo Basin. The Karoo Supergroup comprises, from oldest to youngest, the Dwyka, Ecca and Beaufort Groups, with the coal seams generally hosted within the Vryheid Formation of the Middle Ecca Group. The Vryheid Formation includes interbedded sandstone, siltstone, shales and coal seams. The coal seams are mined by the adjacent Goedehoop Colliery. Five coal seams are present within the Vryheid Formation and are numbered (from base up) as the Number 1, 2, 3, 4 and 5 Seams. The zone of undermining (Bohlweki Environmental, 2005) indicated as underlying the PV Site B is noted to associated with the No. 4 and No. 2 coal seams. The No. 2 Seam ranges between 1.5 and 4.0 m in thickness where it is laterally continuous whilst the No. 4 Seam averages 4.0 m, varying from 1.0 – 12 m in thickness at Goedehoop mine (SRK 566657, 2021). The depth below ground level should be confirmed but based on the general stratigraphy is likely to be more than 50 m below surface (SRK 566657, 2021). The Vryheid Formation overlies the Dwyka formation. A summary of the Lithostratigraphy is provided in Table 3. The regional geological map is presented in Appendix A: Figure 4. Table 3 – Lithostratigraphy Age Supergroup Subsuite Lithology Quaternary Q Surficial alluvial deposits to the north associated with the Koringspruit River Jurassic Jd Fine-grained dolerite Permian Karoo Pv (Vryheid) Sandstone, shale and coal beds Carboniferous C-pd (Dwyka) Diamictite and shale LOCAL The local geology comprises weathering products of the sandstones, siltstones and mudstones of the Vryheid Formation, with isolated dolerite outcrops. The top layer consists of reddish-brown sandy soil, with clayey- sandy subsoil comprising yellowish to brown clays residual of the underlying sandstone formations. Weathering is not, based on the available borehole logs, expected to extend deeper than approximately 10 m. Surficial ash and coal may be present within PV Site A associated with the historical ash dump footprint and in BESS D in the coal stockyard area. A linear structure is indicated on the regional geological map to be orientated northeast to southwest through PV Site B. 2.2.4 HYDROGEOLOGY AQUIFER DESCRIPTION A monitoring program has been established for the KPS with the available boreholes presented on Appendix A: Figure 2. The boreholes are distinguished as shallow or deep but there is limited lithological information provided. Groundwater monitoring in the areas proposed for the BESS and PV Sites are limited with monitoring boreholes located in PV Site A (west of Ashing Area) and in BESS D (coal stockyard). There are no pre-existing monitoring boreholes located in or around PV Site B, BESS B, BESS C and BESS A. Whilst borehole logs and depth are not provided for all the boreholes, the available information implies that there are two distinct aquifers present in the Komati area, namely: — Seasonal shallow, discontinuous perched aquifer within the overlying weathered rock matrix. This zone is conceptualised (Kimopax, 2019) as an upper zone of completely weathered material to a depth of 8 to 10 m with a higher hydraulic conductivity (k of around 1 m/d). Monitoring boreholes which intercept this zone are typically less than 10 m deep. Boreholes drilled as part of this investigation (Section 3) target this aquifer. Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 7 — Regional weathered and/or fractured rock aquifer within the Vryheid Formation. These aquifers are commonly confined along essentially horizontal bedding interfaces between different lithologies. This aquifer occurs below the unsaturated zone (> 10 mbgl) in slightly weathered or fractured bedrock with monitoring boreholes typically being > 30 m deep. GHT Consulting, 2009 indicate that the aquifer hydraulic conductivity for the regional aquifer ranges from 0.007 m/d at AB07 to 2.4 m/d for AB04 with an average of 0.51 m/d. This aquifer is likely to be highly heterogeneous. Recharge is estimated as 3 % of annual rainfall (20.6 mm/a based on 687 mm/a) in undisturbed areas, (Eskom, 2021). WATER LEVELS AND FLOW DIRECTIONS Water levels typically vary from around 1.4 to 12 mbgl with shallow groundwater at surface in AK62 between the Raw Water dams and Ashing Area. Eskom, 2021 indicates that the groundwater flow mimics the topography, and the direction of flow is towards the surface stream, particularly the Koringspruit. A comprehensive numerical groundwater model has been compiled for the KPS area as detailed by Kimopax, 2019 and also indicates that contamination is anticipated to migrate from the pollution sources towards the Koringspruit to the north. AQUIFER CLASSIFICATION The regional aquifer is classified as Minor (Parsons2, 1995 and DWAF3, 1998) or Poor (DEA4, 2010) due to the low exploitation potential (0.1 and 0.5 l/s). It does, however, represent an important source of water for domestic supply to the local communities. The aquifer is vulnerable to groundwater contamination due to the shallow water table. This is evident by the contaminant plume (sulphate) identified as underlying the Ashing Area and coal stockyard. The impact is mitigated by the low conductivity and low recharge. Due to the surrounding use of groundwater by communities, the aquifer is considered to require a medium level of protection5. GROUNDWATER QUALITY Water quality data is captured in the Eskom Komati Wish database. Groundwater quality parameters that need to be analysed are specified in the WUL (Appendix IV, Table 6, Clause 3.6) as pH, electrical conductivity (EC), Total Dissolved Solids (TDS), Total Suspended Solids (SS), Total Alkalinity, chloride (as Cl), sodium (as Na), sulphate, nitrate, ammonia, orthophosphate, fluoride, potassium, manganese, copper, iron, zinc, arsenic and chromium. The 95th percentile was estimated from the data provided for the upgradient (ambient) boreholes, selected boreholes within the KPS and boreholes located on or near the northern site boundary and is included in Appendix B (Table B3) for reference. In summary: — Ambient groundwater quality (as represented by AB58 and AB59) is generally alkaline with an average pH of 8.3. Electrical conductivity (EC) (average 17 and 32 mS/m for AB58 and AB59 respectively) is below the groundwater reserve of 112 mS/m. — Water quality is affected by KPS activities particularly from the Ashing Area and coal stockyard (BESS D). This is indicated by an increase in salinity associated with elevated chloride, sulphate, calcium, magnesium, sodium and fluoride in the coal stockyard area. Metal concentrations for iron and manganese are elevated compared to the ambient groundwater quality (<0.1 mg/l for iron and <0.5 mg/l for manganese) at AB07 (downgrade of the Ashing Area) and in CB09 (coal stockyard). — Boreholes located on and near the northern boundary (CB52, AB47 and CB51) comprise sulphate, fluoride and manganese concentrations which are elevated compared to the ambient water quality and South African drinking water standards. 2 Parsons, R, 1995, A South African Aquifer System Management Classification, WRC Report No. KV77/95 3 Department of Water Affairs and Forestry, Second Edition, 1998. Waste Management Series, Minimum Requirements for Water Monitoring as Waste Management Facilities 4 Department of Environmental Affairs, May 2010, Framework for the Management of Contaminated Land 5 Golder Associates Africa (Pty) Ltd, a member of WSP (Pty) Limited, June 2022, Draft Hydrogeological Investigation for the Eskom Komati Power Station, Report No 22521869-353050-43, June 202 Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 8 PROXIMITY TO DRINKING WATER SUPPLIES Water is supplied via pipeline by the Komati Government Water Scheme which originates from the Nooitgedacht Dam (c132 km from KPS), (Lidwala, 2015). The water is treated by Eskom at the Water Plant and Eskom subsequently supplies water to the municipality; however, the layout of the distribution network and its potential proximity to the areas of proposed developments has not been provided to WSP. Groundwater is abstracted from the adjacent Goedehoop Colliery where groundwater is also utilised for supply (SRK 566657, 2021). The locality of the points of abstraction are not indicated in the available information. A hydrocensus (Appendix A: Figure 2) was carried out in 2008 (GHT Consulting, 2009) with selected points (thirteen) resampled in 2019 (Eskom, 2019). These covered an approximate 15 km radius around KPS. The results of the hydrocensus imply that the surrounding farms to the east, southeast and southwest of KPS obtain water from boreholes for domestic use and for irrigation of crops. The closest boreholes are located within 500 m of the Eskom boundary on the farms Goedehoop, Geluk and Broodsnyders with details included in Table 4. Boreholes identified on the National Groundwater Archive were confirmed to be beyond 1 km of the farm boundary. Table 4 – Hydrocensus Boreholes ID Longitude Latitude Depth Use Water Level Condition (oE) (oS) (m bgl) (mbcl) BB20 29.48213 26.08393 26.1 Domestic Drink 14.10 Good BB21 29.47954 26.10598 26.8 ~ 2.20 (2008); Windmill (2019) 1.76 (2019) BB22 29.47907 26.10586 ~ Domestic Drink ~ Good BB23 29.47905 26.10632 11.0 Domestic Drink 4.50 Broken (2008) indicated to be in use 2019 BB24 29.47125 26.11574 ~ Domestic Drink 15.00 Good BB25 29.47127 26.11574 26.5 Domestic Drink. 20.50 Good Livestock BB26 29.47783 26.11699 6.1 ~ Dry Dry hole BB27 29.47912 26.11710 42.0 Domestic Drink. 32.00 Good Livestock BB43 29.42195 26.12209 15.0 Domestic Drink 8.00 Good BB44 29.42193 26.12198 55.0 Domestic Drink. 5.00 Good Livestock BB45 29.41625 26.11591 ~ ~ ~ Not in use for a long time BB46 29.42719 26.11853 ~ ~ ~ Not in use for a long time Water quality analyses was carried out on the hydrocensus boreholes. According to Eskom (2019), concentrations were generally below the South African drinking water standards and therefore deemed suitable for drinking (based on the parameters analysed). No groundwater abstraction is known to take place within the study area. 3 CONCEPTUAL SITE MODEL A Conceptual Site Model (CSM) has been developed based on the information contained within the preceding sections. The aim of the CSM is to define the source–pathway–receptor linkages which may be applicable under the assumption of an ongoing industrial land-use for the proposed development areas and recognising the existing surroundings and which, based on identification of linkages, could give rise to potential human and/or environmental risks. The CSM has been developed sequentially on the basis that in the event that no plausible linkages exist then no significant risk is considered to be present. Therefore, the CSM specifically focusses on the linkages between the three aspects (i.e. exposure pathway) based on the specified scenarios and if any of these are not identified Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 9 then the risks are considered negligible. It should be acknowledged that the CSM would be expected to evolve as more information becomes available and it must be recognised that if the source–pathway–receptor linkages are altered, the CSM must be reviewed to ensure that the assumptions remain valid. 3.1 POSSIBLE SOURCES While the KPS and the associated Ashing Area along with the neighbouring colliery represent more widespread sources from long term operations, including secondary sources related to existing groundwater impacts, the potential pertinent primary sources specific to the targeted development areas are summarised as follows: PV SITE A — Rehabilitated Domestic Waste Site — Historical Rehabilitated Ash Dump — Unconfirmed use of fertilisers and/or pesticides for crop production PV SITE B — Rehabilitated Ash Dump — Ash and slurry used to backfill undermined areas BESS A — Leakages from mechanical and electrical equipment, chemicals and fabrication activities — Spillages of chemicals from storage areas and the contractor’s yard — Washing and maintenance of equipment including potential solvents and paints BESS B — Historical shooting range — Unconfirmed graves associated with church BESS C — Scrap yard — Possibly hazardous materials within fenced temporary storage area BESS D — Coal stockyard 3.2 KEY RECEPTORS The following plausible receptors have been identified assuming the use of the site and surrounds remain consistent with the current land use: HUMAN HEALTH — Site workers – industrial use (current and future) — Residents in neighbouring communities (i.e. Komati Town) — Groundwater Users: while there are no confirmed abstractions within the study area, groundwater use is known within 500 m of the Eskom boundary Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 10 ENVIRONMENTAL — Groundwater: The aquifer beneath the site (> 35m) is classified as Minor/Poor with the overlying shallow weathered zone (<10m) being perched and discontinuous. The overlying shallow aquifer is not considered a viable groundwater resource but may contribute to seepage in the wetland areas as well as vertical migration into the regional deeper weathered/fractured rock aquifer. It is again noted that the underlying groundwater is known to have been impacted by mining and activities at KPS — Surface water: The closest surface water features are the wetlands associated with the Komatispruit and Gelukspruit drainage lines which originate within or immediately downstream of the Ashing Area. These flow towards the Koringspruit to the north of KPS PROPERTY — Subsurface water supply pipelines and other infrastructure — Neighbouring third-party land — Buried concrete/metal 3.3 POTENTIAL PATHWAYS Taking account of the possible sources, and notwithstanding the potential for ongoing or future direct release/s of contaminants, the hypothetical pathways by which these may affect the identified receptors, thereby potentially completing the exposure pathway/s are discussed within the following subsections. 3.3.1 DIRECT EXPOSURE – DERMAL CONTACT AND INGESTION OF SOILS Dermal contact and/or ingestion of contaminated soils are possible pathways, especially during the proposed development or other maintenance works, and particularly in areas not covered by hardstanding. 3.3.2 VERTICAL MIGRATION OF CONTAMINATION Vertical migration of contamination may occur from source zones into the underlying groundwater by leaching and dissolution, or under the influence of gravity (i.e. liquid chemical products and oils). This will be exacerbated in areas where impervious cover is absent or of compromised integrity due to higher effective infiltration, where contaminant loading/s are more substantial, or where other conditions exist that may promote contaminant-specific mobility (i.e. introduction of acids). While contributory impacts related to activities in the discrete development areas cannot be discounted, the known existing plume originating from the Ashing Area likely represents the principal source of groundwater contamination associated with activities at the KPS. 3.3.3 LATERAL MIGRATION WITHIN GROUNDWATER The lateral migration of contamination will be highly affected by the geological structure, the hydraulic gradient of the underlying groundwater, the permeability of the aquifer unit/s, the efficacy of any attenuation, the effects of recharge and the influence of seasonal fluctuations, as well as by local abstractions. Groundwater is expected to flow generally towards the north towards the Koringspruit, and the plume associated with the impacts from the Ashing Area has been shown to already extend beyond the boundaries of Eskom’s premises and, therefore, lateral migration is confirmed. 3.3.4 DIRECT EXPOSURE – DERMAL CONTACT AND INGESTION OF GROUNDWATER The likelihood of direct contact to site personnel and users is likely negligible under normal operating circumstances in the absence of abstractions within Eskom’s boundaries. There is, however, evidence of Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 11 groundwater uses within the vicinity of KPS, including for potable use and thus this pathway represents a potential cause for concern. 3.3.5 LATERAL MIGRATION OF CONTAMINATION VIA STORMWATER Surface water runoff from exposed and impacted soils, unconfined waste deposits, and/or impacted hardstanding may result in contaminant impacts to both man-made and natural stormwater channels and subsequent accumulation and/or migration therein. While appraisal of stormwater management is beyond the scope of the current document it should be recognised that any impacts may migrate from the site and may also contribute to subsurface impacts. 3.3.6 LATERAL MIGRATION VIA SUBSURFACE INFRASTRUCTURE CONDUITS It is plausible that subsurface utility trenches (i.e. sewers, effluent pipelines, water distribution network) may represent preferential flow-paths for the accumulation and migration of any contaminant impacts. 3.3.7 INHALATION OF VAPOURS Whilst unlikely to affect users of external areas, vapour intrusion into on-site buildings from either soils or shallow groundwater may represent a significant source of risk to human health. 3.3.8 GENERATION OF GROUND GAS In addition to, but distinct from, the inhalation of vapours is the potential generation of ground gases within impacted unsaturated and saturated zones. The characteristics, mass and degradation of potential contamination may lead to the generation of methane, oxides of carbon, ethane, ethene and hydrogen sulphide, depending on the active processes. If migration of such gases into internal structure occurs, these may lead to asphyxiation (via oxygen displacement) or potential explosion. 3.3.9 INHALATION OF AIRBORNE DUST AND FIBRES Agitation and disturbance of soils, especially during substantial earthworks and/or construction activities, may contribute to airborne particulate loads, including potential asbestos fibres, that could become inhaled either by site occupiers or by users of neighbouring areas, including residents of Komati. While specifically excluded from the current scope given its footprint outside of the development areas, the presence of the historical asbestos waste site should be acknowledged. 3.3.10 DIRECT CONTACT WITH PROPERTY Contamination has the potential to permeate water supply pipes used for human consumption or other processes and/or result in aggressive ground conditions which may compromise the structural integrity of buried concrete, as well as metal that may be in direct contact. Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 12 4 CURRENT INVESTIGATION 4.1 FIELDWORK 4.1.1 SITE RECONNAISSANCE As well as to confirm health and safety arrangements, an initial site visit was conducted on 05 May 2022 to oversee and discuss the placement of intrusive positions within the relevant areas of concern. 4.1.2 SITING AND SERVICE CLEARANCE Twenty-five soil sample localities and ten shallow borehole locations were identified following the initial site reconnaissance. As well as to define baseline conditions, these primarily focused on areas where substantial contamination may have been brought about by historic and/or current site activities across the proposed solar PV and BESS development portions; however, at the request of Eskom, also included exploratory positions proximal the fuel depot and down-gradient of the Ashing Area. Where possible, positions were sited down- gradient of the activities/operations identified where any soil impact could be expected to be within the shallow soil profile. It should be noted that AH09 & AH10 were however situated to the east of BESS A due to access constraints and, therefore, may not be representative of potential impacts within the footprint of this proposed development area. Subsurface clearance was undertaken by Hydrometrix Technologies (Pty) Ltd on 08 June 2022 under the supervision of WSP at each of the targeted intrusive locations. A Cable Avoidance Tool (CAT) was used to determine the presence/absence of underground power cables and metal utilities; thereafter, Ground Penetrating Radar (GPR) was adopted to confirm the absence (or otherwise) of other potential services. The clearance report is presented in Appendix C. 4.1.3 AUGERING AND SAMPLING Twenty-five auger holes (AH01–AH25) were manually advanced to depths ranging from 0.3–1.7 mbgl; geotechnical refusal was encountered in the majority of the holes. The positions of the auger holes, digitised using a handheld Global Positioning System (GPS), are illustrated on Appendix A: Figure 5. Headspace testing was undertaken to determine the potential presence of volatile contaminants within the profiles. Soil samples were obtained at approximate 0.5 m intervals (where possible) and placed in a receptacle such that headspace remained. After a period of exposure to ambient atmospheric conditions the concentration of volatile vapours within the closed headspace was measured using a Photo-Ionisation Detector (PID) calibrated using 100 ppm isobutylene. The recorded concentrations including the depth, descriptions of strata encountered and other pertinent comments on the conditions observed during the intrusive works are presented on the exploratory hole logs in Appendix D. 4.1.4 BOREHOLE ADVANCEMENT AND WELL INSTALLATION At the request of Eskom ten permanent monitoring wells (BH01–BH10) were advanced by Soil and Groundwater Remediation Services (SGRS) under supervision of WSP at targeted safely-accessible locations to depths of up to 10m bgl. These were generally positioned in areas where coverage from the existing monitoring network was limited. Boreholes were initially manually advanced to depths of up to 2 mbgl prior to completion by percussive techniques. Similar to the auger holes, headspace testing was completed at approximate 0.5 m intervals during manual advancement and, thereafter, at roughly 1 m intervals upon commencement of mechanical drilling; although, the inevitable loss of volatile due to the drilling methodology is recognised. The recorded vapour concentrations along with the depth and descriptions of strata encountered as well as other pertinent comments Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 13 on conditions observed during the borehole advancement are again presented on the exploratory hole logs in Appendix D, alongside the construction details of each of the subsequently installed monitoring wells. The positions of the wells, determined via specialist surveyor subsequent to their installation, are illustrated on Appendix A: Figure 5. 4.1.5 GROUNDWATER MONITORING AND SAMPLING Due to the short timeframes associated with the project, a maximum period of one week (depending on drilling progression) was allowed following installation for the newly installed wells to stabilise. Measurements of static groundwater levels and the base of each position was first carried out using a dual phase interface meter that allowed the simultaneous measurement of the thickness of any potential Non-Aqueous Phase Liquid (NAPL). Thereafter, prior to sampling, accessible wells were purged of a maximum of three well volumes (where possible) using dedicated single-use bailers. Samples were then collected in laboratory prepared containers which were stored in a temperature-controlled environment for delivery to an accredited laboratory for subsequent analysis. All samples were taken according to internationally accepted protocols, ensuring the potential for cross contamination was minimised. A blind duplicate sample (BH10-01) was obtained from BH03 for quality control purposes. The monitoring data is summarised in Table 5. Table 5 – Groundwater Monitoring Data (06 June 2022) Locality Well Water level Water level (mamsl) Observation (m bgl) Ashing Area BH05 1.55 1,617.05 Light brown, no odour (Up-gradient) PV Site A BH07 1.52 1,629.28 Light brown, no odour BH08 1.25 1,649.55 Light brown, no odour BH06 1.3 1,624.1 Clear translucent, no odour PV Site B BH09 0.86 1,601.54 Clear translucent, no odour BH10 0.95 1,610.05 Clear translucent, no odour BH04 0.88 1,604.42 Clear translucent, no odour BESS C BH03 1.52 1,605.58 Light brown, no odour BESS D BH02 1.55 1,600.35 Brown, no odour BESS D BH01 1.97 1,596.73 Light brown, no odour (Down-gradient) 4.2 LABORATORY ANALYSIS The soil and groundwater samples were submitted to Element Materials Technology (Element), a SANAS accredited laboratory (Facility No T0729) for analyses broadly consistent with the priority contaminants listed in the National Norms and Standards for the Remediation of Contaminated Land and Soil Quality (GN R.331 of 2014); however, supplemented with other selected determinants at the request of Eskom, as follows: SOILS — Metals/metalloids: antimony, arsenic, cadmium, chromium (total and hexavalent), cobalt, copper, iron, lead, manganese, mercury, nickel, selenium, vanadium and zinc — Inorganics: ammoniacal nitrogen, chloride, cyanide, fluoride, nitrate, nitrite and sulphate — Aliphatic petroleum hydrocarbons (C7–C9, C10–C14 and C15–C36) — Volatile Organic Compounds (VOC) including benzene, toluene, ethylbenzene and xylenes (BTEX) — Semi-Volatile Organic Compounds (SVOC) including Polycyclic Aromatic Hydrocarbons (PAH) — Polychlorinated Biphenyls (PCB) — Physiochemical: pH and electrical conductivity NB: asbestos has been specifically excluded from the current assessment given the outcomes of VPC, 2021 as summarised in Table 1 in relation to the historical asbestos disposal site. Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 14 GROUNDWATER — Metals/metalloids: antimony, arsenic, cadmium, calcium, chromium (total and hexavalent), cobalt, copper, iron, lead, magnesium, manganese, mercury, nickel, potassium, selenium, silicon, sodium, vanadium and zinc — Inorganics: ammoniacal nitrogen, chloride, fluoride, nitrate, ortho-phosphate and sulphate — Aliphatic petroleum hydrocarbons (C7–C9, C10–C14 and C15–C36) — VOC including BTEX and Tentatively Identified Compounds (TIC) — SVOC including PAH and TIC — PCB — Physiochemical: alkalinity (total), electrical conductivity, pH, Total Dissolved solids (TDS) and Total Organic Carbon (TOC) Laboratory certificates of analysis are provided in Appendix E. 5 GROUND AND GROUNDWATER CONDITIONS 5.1 SOILS The deepest soil profile that could be achieved was at PV Site A within the area previously used for crops. The soil profile comprised darker brown clayey sand which become lighter brown with depth. No crops were evident at the time of the investigation. The “natural” soil horizon (weathered bedrock) comprises a moist, orange, brown to red-brown sandy clay or clayey sand (residual Vryheid formation) with occasional mottled clayey sand with ferricrete nodules in most of the areas inferring a seasonally fluctuating water table. Fill/made ground was encountered in several samples including: — Coal was observed to 1.5 mbgl (BH02) in the coal stockyard; auger holes (AH01–AH03) refused at 1 mbgl and only coal samples could be obtained — Ash was observed downgrade of the Ashing Area at AH14 and in BH05 and BH06. While ash was not identified in AH13, the soil was darker in colour than elsewhere on the site implying that this area is affected by runoff from the ash dams. By contrast, there was no ash indicated in the rehabilitated ash dump footprint sample (AH15) within PV Site A. — A shallow horizon of around 0.5m was noted for the exploratory holes (AH23, AH24, AH25, BH9 and BH10) located in the area of the rehabilitated dump in the vicinity of PV Site B. A seepage zone was noted as perched on mottled sandy clay under this layer in the auger holes (AH23, AH24 and AH25). There was no evidence of ash in the vicinity of this rehabilitated dump, but the gravel horizon could be backfilled weathered material sourced from the surrounding area. — A soil stockpile of unknown origin (possibly from road building or topsoil) was observed in PV Site A. Samples were obtained near the soils (AH16 and AH17). 5.2 GROUNDWATER 5.2.1 DEPTH Seepage was encountered in the boreholes with BH7 and BH8 (located in PV Site A), but the remaining boreholes were moist with no discrete groundwater strikes observed during drilling. Groundwater depths Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 15 following stabilisation were recorded in all the boreholes with depths varying from 0.86 to 1.97 mbgl which is broadly consistent with the existing dataset (Komati WISH database). 5.2.2 FLOW DIRECTION AND HYDRAULIC GRADIENT Comparing topographic and groundwater elevations an R2 value of 0.99 is calculable (Figure A) resulting in a very strong correlation coefficient and consistent with previous works. The interpolated groundwater flow is illustrated on Appendix A: Figure 6 and confirms an overall flow direction to the north. Very broadly, an average hydraulic gradient is calculated with reference to groundwater elevations (Table 5) at BH08 in the south and BH01 in the north. This represents a difference of ~52.82 m over a lateral distance of approximately 2,866 m, equating to a hydraulic gradient of ~0.018. It should be stressed that hydrogeological conditions are unlikely to be homogenous especially recognising that the shallow aquifer is discontinuous and, therefore, local variability should be expected that may differ markedly from this calculated average. Figure A – Correlation: Topography versus Groundwater Elevation 5.3 CONTAMINATION OBSERVATIONS The results of headspace testing indicated that volatile vapours were below the PID’s level of detection (<0.1 ppm) within all soil samples. Nonetheless, visual evidence of soil contamination was noted as follows: — Coal was noted to a depth of 1.5 mbgl in the coal stockyard — Ash was noted within the proximity of the Ashing Area — Discolouration (staining) was observed on the brick paving at the fuel depot (AH05 and AH06) — Denudation was seen in the vicinity of BESS Area A adjacent to the contractor’s yard. Groundwater samples varied from brown to clear with no obvious visual or olfactory evidence of contamination. Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 16 6 SOIL RESULTS The South African Framework for the Management of Contaminated Land (Framework, May 2010) developed by the then Department of Environmental Affairs (DEA)6 in line with Part 8 of the NEM: WA, outlines the methodology for the screening of potentially contaminated sites to provide a risk-based decision support protocol for their assessment. Further, the then DEA gazetted GN R.331 in May 2014, with these being promulgated under Section 7(2)(d) of the NEM: WA by the then Minister of Water and Environmental Affairs. GN R.331 provides Soil Screening Values (SSVs), a tiered system of priority soil contaminants, to facilitate the determination of sensitivity of the relevant receptor which may be subject to exposure. These are defined as follows: — SSV1 represents the lowest value calculated for each parameter from both the human health and water resource protection pathways. SSV1 values are not land-use specific — SSV2 represents the land-use specific soil concentration and are appropriate for screening level site assessment in cases where protection of water resources is not an applicable pathway for consideration Separately, GN R.331 provides Soil Screening Levels (SSLs) for a number of anions; however, it is notable that these are not related to potential risks to human health via direct exposure. These are specifically investigation values that are relevant only to provide guidance on potentially excessive levels of salts, which can represent a major cause of deterioration of soil or water quality from an ecological perspective. 6.1 INITIAL SCREENING Recognising the general approach prescribed by the Framework, the analytical results for the analysed contaminants of concern have first been compared to the SSV1s published in GN R.331. Where SSV1s are not available reference has been made to the United States Environmental Protection Agency (USEPA) Regional Screening Levels (RSLs) for Residential Soil (May 2022) as a reasonable alternative while recognising the different paradigm behind their derivation. Whilst conservative under many potential exposure scenarios, such screening allows justified rationalisation of potential contaminants that may require further assessment and/or management, and discounts those potential exposure pathways that do not pose a significant risk. Cadmium, hexavalent chromium, cyanide and PCBs as well as the majority of the VOCs and SVOCs were recorded below their respective laboratory detection limits and, therefore, are not seen as contaminants of concern for further consideration. Otherwise, the following is noted: — Arsenic, lead, and manganese were above their respective SSV1s within shallow soils across most of the proposed development areas with the exception of BESS A and BESS B. Similar is noted for vanadium although this was also below its SSV1 at BESS D and the fuel depot, as well as down-gradient — Excluding samples from BH02, BH06 and AH10 copper was ubiquitously above its SSV1 — Iron was above its USEPA RSL within various samples, and largely within ferruginised soils — Sulphate was above its SSL within those samples retrieved from AH01 (coal stockyard) and AH15 (historical ash dump at PV Site A) — Pyrene and benzo(a)pyrene were above their respective SSV1s within the sample collected from AH06 at the fuel depot The pH of the samples collected ranged widely from 4.58–7.92. Although there are no SSVs published for the protection of human health under the NEM: WA, the South African National Standard (SANS) Globally Harmonised System of Classification and Labelling of Chemicals (GHS), SANS 10234:2019 recognises materials with a pH within a range of 2–11.5 as not being hazardous 6 In June 2019, the DEA was renamed the Department of Environment, Forestry and Fisheries (DEFF) and, in April 2021, was renamed the Department of Forestry, Fisheries and the Environment (DFFE) Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 17 6.2 FURTHER SCREENING Where contaminants have been recorded in excess of their respective initial assessment criteria and following the stepwise methodology described in the Framework, further screening has been separately carried out to ascertain whether these could plausibly represent risks to either human health or aquatic systems based on site- specific considerations. As indicated, the SSLs for anions (i.e. sulphate) are only relevant to provide guidance on potentially excessive levels of salts and, therefore, have not been carried forwards into the further screening exercise. Nonetheless, with the exception of localised instances of elevated sulphate within samples containing coal and ash these were consistently below their respective SSLs and so no concern is raised. 6.2.1 RISK TO HUMAN HEALTH Potential risks to human health are based on land-use specific considerations and refer to the applicable SSV2s for the following land uses: — Informal residential — Formal residential — Commercial/industrial Recognising that the town of Komati lies central to the overall proposed development areas, SSV2s relevant for formal residential use have been conservatively adopted to ascertain whether soil contamination may represent a potential health risk. The following is noted: — With the exception of manganese AH20 (PV Site A), BH10 (PV Site B) and BH04 (BESS B) as well as vanadium at AH21 (PV Site A), metals were below their respective SSV2s. While these localised anomalies are noted, overall average concentrations of both manganese (~754 mg/kg) and vanadium (~124 mg/kg) were below their SSV2s for a formal residential setting. Therefore, in the wider context these are considered unlikely to represent a significant source of risk with respect to human health, especially when recognising that all were below their SSV2s relevant for the commercial/industrial land-use of the proposed development areas — Benzo(a)pyrene was above both its formal residential and commercial/industrial SSV2s within AH06 at the fuel depot. This falls outside of the proposed development areas covered under this report; however, is indicative of potential risks to human health from ongoing operations and possibly symptomatic of more extensive impacts local to the fuel depot that will require consideration by Eskom during decommissioning 6.2.2 RISK TO AQUATIC SYSTEMS With respect to soil-based contamination, potential risks to aquatic systems are defined based on the sensitivity of the surface water and groundwater resources. The Framework methodology recognises the adoption of SSV1 as generic criteria in the event that there is a current or potential future groundwater use on or within 1 km of a site, or there is a permanent surface watercourse on or adjacent the site. Recognising the proximal surface water courses, including wetlands, as well as the abstractions within 500 m of the premises boundary, these criteria are considered to be satisfied and therefore, with the exception of iron (USEPA RSL for human health only), the commentary in Section 6.1 is relevant. It must, however, be acknowledged that the published SSV1s do not distinguish between the protection of drinking water and freshwater aquatic ecosystems, nor do they differentiate from where direct human health risks may represent the critical exposure pathway. In this regard the following is noted in respect of the published SSV1s: — Arsenic and lead are based on the protection of drinking water. While lead was noted in the shallow groundwater samples (Section 7), arsenic was consistently below its laboratory detection limit — Manganese, vanadium and benzo(a)pyrene are based on the direct human health risk under an informal residential land-use (as noted by their SSV1s being equivalent to their corresponding SSV2s) — Copper and pyrene are based on the protection of the freshwater aquatic environment Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 18 7 GROUNDWATER RESULTS 7.1 QUALITY CONTROL – DUPLICATE SAMPLE To determine the accuracy of the field sampling methodology and the laboratory analysis, a blind field duplicate sample BH10-01 was collected from monitoring well BH03 and submitted for the full suite of analysis described. Data quality was evaluated based on the relative percentage difference (RPD) in the concentration of detected contaminants between the original and duplicate sample and assessed for a RPD target of 20%. Acknowledging that results from either the original or duplicate sample may be equally valid and that either one may be more, or less, representative of groundwater conditions, the following formula has been utilised to calculate the percentage difference: ( ) Relative Percentage Difference (RPD) = ( ) Excluding pH that is logarithmic, where determinants have been detected, the comparison of the original and duplicate sample results is presented in Table 6 whereby if two values have an RDP greater than 20%, the values are highlighted. Table 6 – Relative Percentage Differences BH03 (Original) versus BH10-01 (Duplicate) Concentration Determinant Units BH03 BH10-01 ~RPD (%) (Original) (Duplicate) Electrical conductivity mS/m 184.9 185 -0.05 Cobalt µg/l 11.1 11 0.9 Iron µg/l 164.4 163.7 0.4 Lead µg/l 4.6 4.6 0 Manganese µg/l 1,718.3 1,639.4 4.7 Nickel µg/l 12.8 12.6 1.6 Vanadium µg/l 1 1 0 Zinc µg/l 37.9 37 2.4 Calcium mg/l 141 141.5 -0.4 Magnesium mg/l 125.4 116.5 7.4 Potassium mg/l 6.2 6 3.28 Sodium mg/l 136.4 137.1 -0.5 Silicon µg/l 19,617 20,135 -2.6 Fluoride mg/l 0.3 0.4 -28.6 Chloride mg/l 73.9 69.9 5.6 Sulphate mg/l 983.1 837.9 16 Orthophosphate mg/l 0.055 0.042 26.8 Ammoniacal nitrogen mg/l 0.75 0.36 70 Alkalinity mg/l 260 256 1.6 Total Solids mg/l 1,537 1,533 0.3 While both fluoride and orthophosphate show RPDs greater than 20% this is in relation to low concentrations whereby the percentage difference is magnified. In real terms the recorded concentrations are of similar magnitudes and on this basis, it is considered that the laboratory analytical data obtained can be relied upon with a satisfactory degree of confidence, especially when noting that all other RPDs are well within the 20% target. Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 19 7.2 DISCUSSION As per Section 5.2, the groundwater flow direction is from south to north. On this basis background groundwater quality is likely best represented by two boreholes located up-gradient of the KPS boundary (AB58 and AB59). The background water quality has been defined by the 95th percentile concentrations of determinants as sourced from the existing Komati Wish database supplied by Eskom. The groundwater reserve is provided in the WUL, 2014 (Appendix IV, Table 7, Clause 4.1) where it is noted that concentrations of 0 mg/l are presented for sodium and sulphate. It is expected that these will be naturally present in the regional aquifer as is evidenced for the ambient water quality at AB58 and AB59 where ranges of 17–22 mg/l and 8–21 mg/l are noted for sodium and sulphate, respectively. Although the reserve limits specified within the WUL have been adopted as the primary source of reference for those determinants included the zero values for sodium and sulphate are omitted from further consideration – Eskom should, however, liaise with the Department of Water and Sanitation (DWS) in this regard. In terms of pH and although lower than background (8.8–9.1) the shallow groundwater is generally near neutral (6.62–7.54) and satisfies the lower pH limit (6.6) specified within the WUL. The other determinants provided for within the WUL are also seen as being broadly compliant; however, exceptions are noted as follows: — A high salt content is recorded at BH03 (BESS C) where, together with elevated concentrations of sodium and sulphate, electrical conductivity, calcium, magnesium and chloride were above their respective reserve limits. This is expected due to the known groundwater plume extending from the up-gradient Ashing Area and concentrations decrease further down-gradient of the KPS (BH02, BESS D) to below the reserve limits. However, increases in the concentrations of a number of determinants are noted at the further down- gradient position (BH01), with magnesium and chloride again above the reserve criteria, albeit at far lower concentrations than BH03. — Electrical conductivity and magnesium are above their reserve limits at BH08. This is located up-gradient of KPS activities on the southern boundary of PV Site A but slightly down-gradient of the background borehole (AB58). — Chloride was above its reserve limit at both BH05 (northeast of the Ashing Area and north of Raw Water Dams) and BH04 (BESS B). The underlying shallow aquifer targeted as part of this investigation is considered a non-aquifer due to the low yield and discontinuous nature. Nonetheless, the possibility of vertical migration of contaminant impacts from this to the regional deeper weathered/fractured rock aquifer is recognised. While appraisal of the quality of water within the deeper aquifer is outside the scope of the current assessment, in recognition of groundwater use within 1 km together with the proximal freshwater aquatic surface water environs, analytical data has also been considered alongside the following: — South African National Standard (SANS) for Drinking Water, SANS 241-1:2015 Edition 2, or Edition 1 (2011) for determinants omitted from the second version — South African Water Quality Guidelines (SAWQG) Volume 1, Domestic Use, Second Edition, 1996 — SAWQG Volume 7, Aquatic Ecosystems, Second Edition, 1996 In this context the known plume associated with the Ashing Area expectedly dominates the signature of down- gradient groundwater quality with manganese at a concentration (1,718.3 µg/l) above both the drinking water chronic health standard (400 µg/l) and freshwater aquatic guideline (180 µg/l). While this plume has been shown to extend off-site to the north, seemingly additional contributions from the KPS and particularly the coal stockyard (BESS D) are also observed with a doubling in the concentration of manganese recorded at BH01 (3,269.5 µg/l). The likely lateral dispersivity of this plume is also apparent at BH05 to the northeast and BH06 to the west where manganese concentrations of 809.5 µg/l and 496.8 µg/l were respectively recorded. Manganese was not otherwise recorded above either its freshwater aquatic guideline or chronic health standard for drinking water; although was noted to be above its aesthetic drinking water standard at BH04 (BESS B). Compared to the background range (6.2–10 µg/l) concentrations of zinc appear elevated within the shallow groundwater across the entire property (16.2–59 µg/l). While far below the drinking water standard of 2 000 µg/l, these are above both the Target Water Quality Range (TWQR) and Chronic Effect Value (CEV) of 2 µg/l and 3.6 µg/l, respectively for aquatic ecosystems, and also above the Acute Effect Value (AEV) of 36 µg/l in four of ten boreholes (40%) sampled under the current scope. This includes positions both up- and down-gradient and therefore the source of zinc remains uncertain. Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 20 While absent in the background, lead has been detected within all shallow groundwater samples obtained. Notably, however, this is an approximate order of magnitude greater, and above the drinking water standard, within the west of the property (BH06, BH07 and BH08 [PV Site A] and BH09 [PV Site B]). While the combustion of fossil fuels (i.e. coal) is a recognised source of environmental lead, the reason for the noted distribution is uncertain and therefore remains unconfirmed; however, appears to correlate with typically higher concentrations of lead in soils in the west of the premises (Section 6.2.2). Exceedances of the adopted standards/guidelines does not necessarily confirm the presence of an unacceptable risk but provides a conservative indication of where the shallow groundwater may represent a source of impact for the identified receptors. It is understood (VPC, 2021) that rehabilitation and management is planned for the plume associated with the Ashing Area and, as such, long term improvements in the quality of shallow groundwater would be expected once this process is implemented. While the sources of lead and zinc cannot be categorically confirmed these are almost certainly related to the activities at both KPS and the neighbouring colliery, and more detailed assessment/s would be recommended to ensure appropriate protection of any potential receptors. Otherwise, the demonstrated impacts to shallow groundwater are not considered to represent substantial constraints to the proposed development specific to the two PV and four BESS sites. 8 CONCLUSIONS Based on the outcomes of the targeted investigatory works, a number of contaminants largely consisting of metals and nutrients/salts together with localised PAHs have been identified within both soils and/or shallow groundwater that are indicative of impacts related to activities at KPS, and particularly associated with the Ashing Area that lies outside of the proposed development areas that are the focus of this document. However, when considering the approach to assessment as defined by the Framework for the Management of Contaminated Land and taking cognisance of the CSM, the magnitude of impact is largely not considered to represent a significant source of risk with respect to human health and/or aquatic systems when specifically considering the end-use of the areas of concern. There will, however, be a requirement to ensure appropriate management of excavations, and especially where these are required within areas proximal to residential dwellings of Komati. Further, although contributory impacts to groundwater contamination is evident at the Coal Stockyard (BESS D), this source will be removed during the decommissioning of this facility. Outside of the two PV and four BESS sites covered by this document, a potentially significant contamination has been highlighted proximal the fuel depot to the north of KPS in relation to the concentration of benzo(a)pyrene in shallow soils and Eskom should ensure that appropriate assessment is undertaken to inform relevant corrective actions. The NEM: WA provides the following definition of ‘contaminated’: “the presence in or under any land, site, buildings or structures of a substance or micro-organism above the concentration that is normally present in or under that land, which substance or micro- organism directly or indirectly affects or may affect the quality of soil or the environment adversely” Therefore, and taking cognisance of Section 37(2) of the NEM: WA, it is WSP’s opinion that the proposed development areas would likely be regarded as ‘contaminated’ based on definition, with certain determinants clearly being above a ‘normal’ level. However, recognising the outcomes of the risk assessment, in terms of Section 38(1)(c) of the NEM: WA it is also considered likely that the demonstrated contamination specific to these areas “does not present an immediate risk, but that measures are required to address the monitoring and management of that risk”. The preliminary nature of this report is again stressed. Additional and more comprehensive intrusive works will almost certainly be necessary to validate the findings herein as well as to prepare a Site Assessment Report (SAR) for authority submission. This may need to be a consolidated submission to the DFFE covering the entirety of the Eskom premises and, as such, liaison with the authorities at the earliest opportunity is recommended. In this regard attention is also drawn to the implications of existing environmental authorisations (i.e. WUL and WML) within the areas of proposed development that will likely require separate management to the process applicable to Part 8 of the NEM: WA (i.e. provision for a Remediation Order). Eskom Komati Power Station ESIA and WULA WSP Project No. 41103965 July 2022 Eskom Holdings SOC Ltd Page 21 APPENDIX A FIGURES 29 .4528 161 1615 KEY MAP LEGEND -26 .08034 -26 .08034 0 1585 1605 Koringspru LIM + New boreholes / it 1600 NW MP + Auger boreholes / NC FS KZN + Site monitoring boreholes / EC Contours (5m) WC BH1 Komati Power Station 56 IS Lake Finn KPS AH4 Municipality sewerage works 1590 BESS D AH1 Proposed Infrastructure 159 + Broodsnyders Farm 5 BH2 R35 Kroonfontein UG (Ash filled) , AH2 Municipal Sewerage works / Lake Stoffel 1610 + , AH3 Kroonfontein UG (Slurry filled) 5 AH5 159 Main road AH6 16 + Goodehoep Colliery 30 Rivers - Perennial Ko , 16 AH24 25 Rivers - Non perennial m BESS A at 1600 AH7 i sp BH4 AH9 16 BESS C ru BH10 20 AH8 it 16 AH11 BESS B BH3 15 AH25 1605 Church AH10 AH23 AH12 Ge l uk AH13 spr AH19 u it BH9 + / , 10 Komati Town AH14 16 1615 0 BH5 162 PV Site B PATH: S:\GISS\Gis Projects\22521869_ Eskom Komati PS Hydrogeological Investigation\MXD\2022\Jul22\Contaminated land maps\22521869_Fig5_FieldInvestigation_A3L.mxd PRINTED ON: 2022-07-21 AT: 8:57:26 PM Blinkplan police station / + , 1625 BH6 AH22 + Koornfontein School , BH7 30 16 AH16 AH17 IF THIS MEASUREMENT DOES NOT MATCH WHAT IS SHOWN, THE SHEET SIZE HAS BEEN MODIFIED FROM: ISO A3 1635 AH20 16 AH18 15 0 200 400 600 16 40 10 16 + , Geluk Farm NOTE(S) 1:15,000 METERS 16 05 AH15 PV Site A REFERENCE(S) COORDINATE SYSTEM: GCS WGS 1984 SERVICE LAYER CREDITS: AH21 1645 CLIENT ESKOM R542 BH8 1650 PROJECT ESKOM KOMATI PV ESIA TITLE FIGURE 5: FIELD INVESTIGATIONS CONSULTANT YYYY-MM-DD 7/21/2022 25mm DESIGNED MB 55 PREPARED MB 16 REVIEWED SS + Goodehoop Farm 6 0 16 , APPROVED SS PROJECT NO. CONTROL REV. FIGURE 29 .4528 41103965 0 0 0 45000 KEY MAP LEGEND LIM ( Groundwater level (mamsl) ! NW MP Groundwater flow direction Groundwater piezometric contour (mamsl) FS KZN NC EC Komati Power Station 56 IS WC PV Sites BESS Koringspruit River Dam Pan Rivers BH1 (1597 mamsl) ( ! Rivers - Non perennial 8 159 BH2 (1600 mamsl) ( ! 1602 1600 1604 BH4 (1604 mamsl) BH3 (1606 mamsl) BH10 (1602 mamsl) ( ! 1606 ! ( ( ! 1608 BH9 (1610 mamsl) 1610 ( ! 1612 1614 BH5 (1617 mamsl) 1616 ( ! PATH: S:\GISS\Gis Projects\22521869_ Eskom Komati PS Hydrogeological Investigation\MXD\2022\Jul22\Contaminated land maps\22521869_Fig6_GW_Piezometric_A3L.mxd PRINTED ON: 2022-07-21 AT: 7:20:10 PM 1618 1620 BH6 (1624 mamsl) 1622 1624 BH7 (1629 mamsl) ( ! 1626 ! ( 1628 1630 IF THIS MEASUREMENT DOES NOT MATCH WHAT IS SHOWN, THE SHEET SIZE HAS BEEN MODIFIED FROM: ISO A3 1632 1634 0 300 600 900 1636 1638 1:18,000 METERS NOTE(S) 1640 1642 1644 REFERENCE(S) COORDINATE SYSTEM: WGS LO29 SERVICE LAYER CREDITS: SOURCE: ESRI, MAXAR, EARTHSTAR GEOGRAPHICS, AND THE 1646 GIS USER COMMUNITY BH8 (1650 mamsl) CLIENT ! ( ESKOM PROJECT ESKOM KOMATI PV ESIA TITLE FIGURE 6: PIEZOMETRIC MAP CONSULTANT YYYY-MM-DD 7/13/2022 25mm DESIGNED MB G oe PREPARED MB d eh REVIEWED SS oo -2890000 -2890000 ps APPROVED SS pr ui t PROJECT NO. CONTROL REV. FIGURE 45000 41103965 0 0 0 APPENDIX B BACKGROUND GROUNDWATER QUALITY Determinant Unit Ambient Water Quality th AB58 95 Percentile AB59 95th Percentile (October 2011-January 2022) (October 2011-January 2022) pH units 9.1 8.8 EC mS/m 44 29 Arsenic µg/l <10 <10 Total Chromium µg/l 2 2 Hexavalent Chromium mg/l - <2 Copper µg/l 11 2 Total Iron µg/l 10 124 Lead µg/l <4 <4 Manganese µg/l 490 111 Mercury µg/l - <4 Zinc µg/l 10 6.2 Calcium mg/l 25 12 Magnesium mg/l 41 14 Potassium mg/l 15 11 Sodium mg/l 22 17 Silicon µg/l - 316.8 Fluoride mg/l 0.4 0.3 Chloride mg/l 11 10 Sulphate mg/l 21 8 Nitrate as N mg/l 1.1 1.4 Ortho Phosphate as P mg/l 0.02 0.02 Ammoniacal Nitrogen as N mg/l 1.57 1.09 Total Alkalinity as CaCO3 mg/l 253 122 TDS mg/l - 148 APPENDIX C SERVICE CLEARANCE REPORT Unit 20 30 Surprise Road Maxmead, 3610 South Africa Tel: +27 21 556 6680 Cell: +27 61 190 0644 Email: info@hydrometrix.co.za 10 June 2022 UTILITIES SURVEY REPORT ESKOM – KOMATI POWER STATION INTRODUCTION Hydrometrix Technologies was appointed by WSP Group PTY Ltd to clear borehole and auger positions as well as survey borehole positions at the Eskom Komati power station in Mpumalanga. The purpose of the survey was to identify buried utilities and depths around proposed drill positions. Site work was completed on 08 June 2022. The survey area as per image 1 below. ESKOM KOMATI POWER STATION SERVICES DETECTION METHODLOGY Detection of various underground services within the target area is conducted in the following manner: • Electrical and Telkom cables, steel pipes and other conductive utilities: A combination of an electromagnetic transmitter and receiver is used, inducing a signal onto the utility by means of: o Direct Connection at valves, lamp post etc.; o Clamping inside Telkom chambers, electrical substations etc. if accessible; o Induction scan where no contact points on services are available. • Storm Water and Sewer lines: These types of services are located by gaining access at points such as manholes, kerb inlets etc. A self-containing sonde is propelled down the pipe using a fibre flex rod. The sonde transmits a signal, which enables the operator to locate the exact position and depth of the sonde from above ground by using a receiver. • Non-metallic pipes and other non-conductive services: Non-metallic utilities, such as AC water mains and fibre optic cables, are located by means of Ground Penetrating radar (GPR). By scanning the servitude with GPR, changes in ground conductivity are detected. The alignment of several positions of this nature usually indicates the existence of non-metallic services. GPR will only be used to locate services that could not be located by means of electromagnetic methods. Note: Positive ground penetrating radar results are dependent on good soil conditions. If soil conditions are not favourable to good results, this will be noted by the contractor in the survey report. Utility line are drawn on the survey report with colour coding unique to each utility type: Type of Utility Colour Coding Electrical Cables RED Water Pipes BLUE Telkom and Fibre Optic Cables ORANGE Storm Water Pipes PURPLE Sewer Pipes GREEN Product Lines Yellow Unknown Utilities PINK SURVEY RESULTS UTILITY LAYOUTS Image 1: Auger Hole 01 Image 2: Auger Hole 02 Image 3: Auger Hole 03 Image 4: Auger Hole 04 Image 5: Auger Hole 05 Image 6: Auger Hole 06 Image 7: Auger Hole 07 Image 8: Auger Hole 08 Image 9: Auger Hole 11 Image 10: Auger Hole 12 Image 11: Auger Hole 14 Image 12: Auger Hole 15 Image 13: Auger Hole 16 Image 14: Auger Hole 17 Image 15: Auger Hole 18 Image 16: Auger Hole 19 Image 17: Auger Hole 20 Image 18: Auger Hole 21 Image 19: Auger Hole 23 Image 20: Auger Hole 24 Image 21: Borehole 01 Image 22: Borehole 02 Image 23: Borehole 03 Image 24: Borehole 04 Image 25: Borehole 05 Image 26: Borehole 06 Image 27: Borehole 07 Image 28: Borehole 08 Image 29: Borehole 09 Image 30: Borehole 10 APPENDIX D EXPLORATORY HOLE LOGS CORE RECOVERY & ROCK QUALITY KEY TO SYMBOLS ON EXPLORATORY HOLE RECORDS IDENTIFIER DESCRIPTION SAMPLES, FIELD TESTS, TCR Total Core Recovery (%) MEASUREMENTS & RESULTS SCR Solid Core Recovery (%) TYPE DESCRIPTION RQD Rock Quality Designation (%) B Bulk sample (disturbed) UCS Unconfined Compressive Strengths (kN/m2) BLK Block sample FI Fracture Index (discontinuities per metre): NI – non intact, NR – no CORE Core sample recovery, NA – non applicable. CBR California Bearing Ratio mould sample GROUNDWATER OBSERVATIONS D Small tub sample (disturbed) SYMBOL DESCRIPTION ES Environmental soil sample Groundwater strike EW Environmental water sample Groundwater level after defined standing period G Gas sample SOIL AND ROCK SYMBOLS SPT Standard Penetration Test (COMBINED AS NECESSARY) Standard Penetration Test – solid 60O (C) cone PATTERN DESCRIPTION (S) Standard Penetration Test – Split Spoon Ash ‘x’ blows required to drive 0.3m after N=‘x’ seating Boulders and Cobbles N=‘x’/‘y’ ‘x’ blows for ‘y’ metres within the SPT Breccia Undisturbed sample of specified U ‘x’ diameter ‘x’ Chalk ‘x’ ‘x’ blows required to drive ‘U’ tube 0.45m blows Clay HSV Hand Shear Vane test in kN/m2 Coal P(F),(P) Piston sample, F – not recovered, P – partially recovered Concrete / Brick P.Pen Hand Pocket Penetrometer test in kN/m 2 Conglomerate PID Photo-Ionisation Detector test in ppm Gravel NVT No Valid Test Calcrete / Gypsum wsp.com Igneous (coarse grained) INSTALLATION, INSTRUMENTATION & BACKFILL DETAILS Igneous (fine grained) (COMBINED AS NECESSARY) Igneous (medium grained) PATTERN DESCRIPTION Limestone Plain pipe with concrete surround Made Ground Plain pipe with bentonite seal Metamorphic (massive) Slotted pipe with inert surround and Metamorphic (schistose) filter sock (where necessary) Vibrating Wire Piezometer Cable with Metamorphic (banded) bentonite seal Vibrating Wire Piezometer Tip with Mudstone sand surround Peat Arisings Sand NOTES AND GENERAL REMARKS FOR Sandstone INTERPRETATION OF EXPLORATORY HOLE RECORDS Shale 1 Soil and rock descriptions are primarily based on Silt observable materials recovered only 2 Lithostratigraphic classifications (groups, formations Siltstone etc.) are assigned based on a combination of the available geological map/s, visual observations and the Tarmac descriptions reported alongside professional judgement Topsoil Hole No. BOREHOLE LOG AH01 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.471 Hand Auger R. Netshirembe N -26.087 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Slightly moist black GRAVEL of subangular to subrounded fine to coarse coal. <0.1 (1.00) MG 1.00 1.00 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH02 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.471 Hand Auger R. Netshirembe N -26.088 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Slightly moist black GRAVEL of subangular to subrounded fine to coarse coal. <0.1 (1.00) MG 1.00 1.00 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH03 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.472 Hand Auger R. Netshirembe N -26.088 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Slightly moist black GRAVEL of subangular to subrounded fine to coarse coal. <0.1 (1.00) MG 1.00 1.00 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH04 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 03-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.471 Hand Auger R. Netshirembe N -26.086 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Moist dark brown clayey SAND. (0.30) MG 0.30 <0.1 Moist orange-brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.80) VF <0.1 1.10 1.10 ES End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH05 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 03-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.474 Hand Auger R. Netshirembe N -26.089 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Brick. (0.20) MG 0.20 Moist (firm) orange to red sandy CLAY [Probable Weathered VRYHEID FORMATION]. <0.1 (0.60) VF 0.80 0.80 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH06 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 03-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.474 Hand Auger R. Netshirembe N -26.089 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Brick. (0.20) MG 0.20 Moist (firm) orange to red sandy CLAY [Probable Weathered VRYHEID FORMATION]. <0.1 (0.60) VF 0.80 Moist (firm) orange to red mottled grey sandy CLAY [Probable Weathered VRYHEID FORMATION]. (0.70) VF 1.50 1.50 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH07 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.476 Hand Auger R. Netshirembe N -26.091 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Slightly moist brown gravelly SAND. Gravel is angular to subangular fine to coarse weathered shale. (0.30) MG 0.30 0.30 ES <0.1 Exploratory Hole Terminated due to Refusal END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH08 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 03-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.476 Hand Auger R. Netshirembe N -26.092 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Moist brown gravelly SAND. Gravel is angular to subangular fine to coarse weathered shale. (0.50) MG 0.50 <0.1 Slightly moist orange-brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.60) VF <0.1 1.10 1.10 ES End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH09 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.470 Hand Auger R. Netshirembe N -26.092 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist (firm) red-brown sandy CLAY [Probable Weathered VRYHEID FORMATION]. (0.50) VF 0.50 <0.1 Moist red mottled brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.80) VF <0.1 1.30 1.30 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH10 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.470 Hand Auger R. Netshirembe N -26.092 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist (firm) red-brown sandy CLAY [Probable Weathered VRYHEID FORMATION]. (0.50) VF 0.50 <0.1 Moist red clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.60) VF <0.1 1.10 1.10 ES End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH11 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.467 Hand Auger R. Netshirembe N -26.092 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist (firm) red-brown sandy CLAY [Probable Weathered VRYHEID FORMATION]. (0.50) VF 0.50 <0.1 Moist red clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.50) VF 1.00 <0.1 End of Exploratory Hole END 1.50 ES 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH12 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.467 Hand Auger R. Netshirembe N -26.093 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist (firm) red-brown sandy CLAY [Probable Weathered VRYHEID FORMATION]. (0.50) VF 0.50 <0.1 Moist red clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.50) VF 1.00 <0.1 End of Exploratory Hole END 1.50 ES 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH13 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.474 Hand Auger R. Netshirembe N -26.095 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist (firm) dark brown to black sandy CLAY [Probable Weathered VRYHEID FORMATION]. (0.60) VF <0.1 0.60 0.60 ES Exploratory Hole Terminated due to Refusal END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH14 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.478 Hand Auger R. Netshirembe N -26.097 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Moist grey ASH. (0.50) MG 0.50 <0.1 Moist (firm to stiff) orange-brown sandy CLAY [Probable Weathered VRYHEID FORMATION]. (0.60) VF <0.1 1.10 1.10 ES End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH15 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.471 Hand Auger R. Netshirembe N -26.108 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist dark brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.60) VF <0.1 0.60 Moist light brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.40) VF 1.00 1.00 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH16 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.463 Hand Auger R. Netshirembe N -26.102 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Slightly moist orange to red clayey SAND with occasional weathered ferricrete nodules [Probable Weathered VRYHEID FORMATION]. (0.30) VF 0.30 0.30 ES <0.1 Exploratory Hole Terminated due to Refusal END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH17 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.463 Hand Auger R. Netshirembe N -26.103 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist dark brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.40) VF 0.40 <0.1 Moist light brown mottled red clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.40) VF 0.80 0.80 ES <0.1 Exploratory Hole Terminated due to Refusal END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH18 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.468 Hand Auger R. Netshirembe N -26.106 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist dark brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.50) VF 0.50 <0.1 Moist light brown mottled red clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.20) VF <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 1.70 1.70 ES End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH19 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.471 Hand Auger R. Netshirembe N -26.095 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist orange to red mottled grey clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.50) VF 0.50 <0.1 Moist orange to grey clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.70) VF 1.00 ES <0.1 1.20 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH20 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 03-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.453 Hand Auger R. Netshirembe N -26.105 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist dark brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.00) VF 1.00 <0.1 Moist light brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.60) VF <0.1 1.60 END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 1.60 ES End of Exploratory Hole Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH21 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.463 Hand Auger R. Netshirembe N -26.110 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist dark brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (0.50) VF 0.50 <0.1 Moist brown to red SAND with occasional weathered ferricrete nodules [Probable Weathered VRYHEID FORMATION]. (0.70) VF <0.1 1.20 1.20 ES End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH22 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 04-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.452 Hand Auger R. Netshirembe N -26.101 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) Moist dark brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.00) VF 1.00 1.00 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Groundwater not encountered. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH23 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 03-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.450 Hand Auger R. Netshirembe N -26.094 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Moist (firm to stiff) dark brown gravelly CLAY. Gravel is angular to subangular fine to coarse weathered shale [Suspected Reworked/Transported Natural Material]. (0.50) MG 0.50 <0.1 Moist (firm) orange to brown sandy CLAY with occasional weathered ferricrete nodules [Probable Weathered VRYHEID FORMATION]. (0.60) VF <0.1 1.10 1.10 ES End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 0.50 Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Seepage at 0.5m bgl. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH24 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 03-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.459 Hand Auger R. Netshirembe N -26.091 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Moist dark brown gravelly SAND. Gravel is angular to subangular medium to coarse weathered sandstone [Suspected Reworked/Transported Natural Material]. (0.50) MG 0.50 <0.1 Moist (firm) orange to brown sandy CLAY with occasional weathered ferricrete nodules [Probable Weathered VRYHEID FORMATION]. (0.60) VF <0.1 1.10 1.10 ES End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 0.50 Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Seepage at 0.5m bgl. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG AH25 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 03-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.452 Hand Auger R. Netshirembe N -26.093 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology Result (mAOD) (Thick mm -ness) MADE GROUND: Moist dark brown gravelly SAND. Gravel is angular to subangular medium to coarse weathered sandstone [Suspected Reworked/Transported Natural Material]. (0.50) MG 0.50 <0.1 Moist (firm) orange to brown sandy CLAY with occasional weathered ferricrete nodules [Probable Weathered VRYHEID FORMATION]. (0.80) VF <0.1 1.30 1.30 ES <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 0.50 Chiselling Water Added From To Hours Tool From To General Remarks 1. Elevation not surveyed; position digitised by eye only. 2. Seepage at 0.5m bgl. Scale 1:12.5 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH01 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.471 Air Percussion R. Netshirembe N -26.085 1598.742 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) Moist orange-brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.00) VF 1597.74 1.00 <0.1 Wet black slightly gravelly clayey SAND. Gravel is subangular to subrounded fine to coarse coal [Probable Weathered VRYHEID <0.1 FORMATION]. 1.50 ES <0.1 <0.1 <0.1 (6.00) VF <0.1 <0.1 1591.74 7.00 <0.1 Wet pale brown mottled black clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (3.00) VF 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 1588.74 10.00 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 7.00 Chiselling Water Added From To Hours Tool From To General Remarks 1. Seepage at 7m bgl. Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH02 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.471 Air Percussion R. Netshirembe N -26.087 1601.869 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) MADE GROUND: Moist black GRAVEL of subangular to subrounded fine to coarse coal. <0.1 (1.50) MG 1.00 ES <0.1 1600.37 1.50 <0.1 Moist orange-brown mottled black clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.00) VF 1599.37 2.50 <0.1 Moist orange-brown clayey SAND [Probable Weathered VRYHEID FORMATION]. (2.50) VF <0.1 1596.87 5.00 <0.1 Moist pale brown silty SAND [Probable Weathered VRYHEID FORMATION]. <0.1 <0.1 (4.00) VF <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 1592.87 9.00 <0.1 Moist grey to black silty SAND [Probable Weathered VRYHEID FORMATION]. (1.00) VF 1591.87 10.00 <0.1 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 8.00 Chiselling Water Added From To Hours Tool From To General Remarks 1. Seepage at 8m bgl. Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH03 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 02-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.477 Air Percussion R. Netshirembe N -26.092 1607.060 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) MADE GROUND: Moist brown SAND. MG 1606.56 0.50 <0.1 Moist orange-brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.50) VF 1.50 ES <0.1 1605.06 2.00 <0.1 Moist pale orange silty SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (3.00) VF <0.1 1602.06 5.00 <0.1 Moist light brown silty SAND [Probable Weathered VRYHEID FORMATION]. <0.1 <0.1 (5.00) VF <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 <0.1 1597.06 10.00 <0.1 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 8.00 Chiselling Water Added From To Hours Tool From To General Remarks Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH04 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 01-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.467 Air Percussion R. Netshirembe N -26.092 1605.338 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) Moist (firm) red-brown sandy CLAY [Probable Weathered VRYHEID FORMATION]. VF 1604.84 0.50 <0.1 Moist becoming wet red mottled brown clayey SAND [Probable Weathered VRYHEID FORMATION]. 1.00 ES <0.1 <0.1 <0.1 <0.1 (5.50) VF <0.1 <0.1 1599.34 6.00 <0.1 End of Exploratory Hole END 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 1.50 Chiselling Water Added From To Hours Tool From To General Remarks Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH05 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 31-05-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.480 Air Percussion R. Netshirembe N -26.098 1618.645 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) MADE GROUND: Moist grey ASH. MG 1618.15 0.50 <0.1 MADE GROUND: Red brown and grey sandy GRAVEL of angular to subrounded fine to coarse brick and concrete. <0.1 (1.00) MG 1617.15 1.50 1.50 ES <0.1 Moist red to brown clayey SAND with frequent weathered ferricrete nodules [Probable Weathered VRYHEID FORMATION]. <0.1 (2.50) VF <0.1 1614.65 4.00 <0.1 Wet brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 <0.1 <0.1 (6.00) VF <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 <0.1 1608.65 10.00 <0.1 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 4.00 Chiselling Water Added From To Hours Tool From To General Remarks 1. Hole collapsed from 6 - 10 m bgl. Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH06 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 31-05-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.465 Air Percussion R. Netshirembe N -26.101 1625.457 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) MADE GROUND: Moist grey ASH. MG 1624.96 0.50 <0.1 Moist (firm to stiff) orange-brown sandy CLAY [Probable Weathered VRYHEID FORMATION]. <0.1 (1.50) VF 1.50 ES <0.1 1623.46 2.00 <0.1 Moist red-brown clayey SAND with occasional ferricrete nodules [Probable Weathered VRYHEID FORMATION]. <0.1 (2.00) VF 1621.46 4.00 <0.1 Wet pale brown silty SAND [Probable Weathered VRYHEID FORMATION]. <0.1 <0.1 <0.1 (6.00) VF <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 <0.1 1615.46 10.00 <0.1 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 4.00 Chiselling Water Added From To Hours Tool From To General Remarks 1. Seepage at 4m bgl. Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH07 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 01-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.457 Air Percussion R. Netshirembe N -26.102 1630.761 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) Moist dark brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.00) VF 1629.76 1.00 <0.1 Moist light brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.00) VF 1628.76 2.00 2.00 ES <0.1 Moist light brown silty SAND [Probable Weathered VRYHEID FORMATION]. <0.1 <0.1 <0.1 <0.1 (8.00) VF <0.1 <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 <0.1 1620.76 10.00 <0.1 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Groundwater not encountered. Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH08 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 01-06-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.470 Air Percussion R. Netshirembe N -26.111 1650.798 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) Moist dark brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.00) VF 1649.80 1.00 1.00 ES <0.1 Moist light brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 (1.00) VF 1648.80 2.00 <0.1 Moist light brown silty SAND [Probable Weathered VRYHEID FORMATION]. <0.1 <0.1 <0.1 <0.1 (8.00) VF <0.1 <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 <0.1 1640.80 10.00 <0.1 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing Chiselling Water Added From To Hours Tool From To General Remarks 1. Groundwater not encountered. Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH09 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 31-05-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.450 Air Percussion R. Netshirembe N -26.095 1611.041 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) MADE GROUND: Moist (firm) dark brown gravelly CLAY. Gravel is angular to subangular fine to coarse weathered shale [Suspected MG 1610.54 0.50 <0.1 Reworked/Transported Natural Material]. Moist (firm) light orange to brown sandy CLAY with occasional ferricrete nodules [Probable Weathered VRYHEID FORMATION]. <0.1 (1.50) VF 1.50 ES <0.1 1609.04 2.00 <0.1 Moist (firm) light orange sandy CLAY [Probable Weathered VRYHEID FORMATION]. <0.1 (2.00) VF 1607.04 4.00 <0.1 Moist becoming wet light brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 <0.1 <0.1 (6.00) VF <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 <0.1 1601.04 10.00 <0.1 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 7.00 Chiselling Water Added From To Hours Tool From To General Remarks Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. Hole No. BOREHOLE LOG BH10 WSP Group Africa (Pty) Ltd Building C, Knightsbridge, Project Sheet 33 Sloane Street, Bryanston, 2191 Telephone: +27 11 361 1380 Fax: +27 11 361 1301 Komati Solar PV & BESS ESIA 1 of 1 Job No Client Date 41103965 Eskom Holdings SOC Limited 30-05-22 Contractor / Driller Method/Plant Used Logged By Co-Ordinates (DEC) Ground Level (m AOD) Soil & Groundwater E 29.456 Air Percussion R. Netshirembe N -26.092 1602.403 Remediation Services Install / SAMPLES & TESTS STRATA Backfill Depth (kN/m2) (kN/m2) Dia. (ppmV) P.Pen Water Test Elev. HSV PID Depth Type Description Legend Geology 50 Result (mAOD) (Thick mm -ness) MADE GROUND: Moist (firm) dark brown gravelly CLAY. Gravel is angular to subangular fine to coarse weathered shale [Suspected MG 1601.90 0.50 <0.1 Reworked/Transported Natural Material]. Moist (firm) light orange to brown sandy CLAY with occasional ferricrete nodules [Probable Weathered VRYHEID FORMATION]. <0.1 (1.50) VF 1.50 ES <0.1 1600.40 2.00 <0.1 Moist (firm) light orange sandy CLAY [Probable Weathered VRYHEID FORMATION]. <0.1 (2.00) VF 1598.40 4.00 <0.1 Moist light brown clayey SAND [Probable Weathered VRYHEID FORMATION]. <0.1 <0.1 <0.1 (6.00) VF <0.1 08 WSP BH LOG 41103965-GINT LOGS.GPJ WSPETEMPLATE1.03.GDT 21/07/22 <0.1 1592.40 10.00 <0.1 End of Exploratory Hole END Boring Progress Water Strikes Date Time Depth Casing Dpt Dia. (mm) Water Dpt Date Time Strike Minutes Standing Casing 2.00 Chiselling Water Added From To Hours Tool From To General Remarks 1. Seepage at 2m bgl. Scale 1:68.75 Notes: All dimensions in metres. Logs should be read in accordance with the provided Key. Descriptions are based on visual and manual identification. APPENDIX E CERTIFICATES OF ANALYSIS Element Materials Technology Unit D2 & D5 9 Quantum Road Firgrove Business Park W: www.element.com Somerset West 7130 South Africa WSP Group Africa Building C, Knightsbridge 33 Sloane Street Bryanston Johannesburg Gauteng South Africa 2191 Attention : Noma Nyoka Date : 17th June, 2022 Your reference : Our reference : Test Report 22/528 Batch 1 Location : Eskom Komati Project Date samples received : 7th June, 2022 Status : Final report Issue : 1 Thirty five samples were received for analysis on 7th June, 2022 of which thirty five were scheduled for analysis. Please find attached our Test Report which should be read with notes at the end of the report and should include all sections if reproduced. Interpretations and opinions are outside the scope of any accreditation, and all results relate only to samples supplied. All analysis is carried out on as received samples and reported on a dry weight basis unless stated otherwise. Results are not surrogate corrected. Analysis was undertaken at either Element Materials Technology UK, which is ISO 17025 accredited under UKAS (4225) or Element Materials Technology (SA) which is ISO 17025 accredited under SANAS (T0729) or a subcontract laboratory where specified. NOTE: Under International Laboratory Accreditation Cooperation (ILAC), ISO 17025 (UKAS) accreditation is recognised as equivalent to SANAS (South Africa) accreditation. Authorised By: Organics Laboratory: Inorganics Laboratory: Debbie van Wyk Greg Ondrejkovic Greg Ondrejkovic Technical Supervisor Technical Supervisor Please include all sections of this report if it is reproduced Element Materials Technology South Africa (Pty) Limited Registered Office: Unit D2/D5, 9 Quantum Road, Firgrove Business Park, Somerset West, Western Cape, 7130, South Africa Company Registration No: 2015/025446/07 1 of 15 Element Materials Technology Client Name: WSP Group Africa Report : Solid Reference: Location: Eskom Komati Project Solids: V=60g VOC jar, J=250g glass jar, T=plastic tub Contact: Noma Nyoka EMT Job No: 22/528 EMT Sample No. 1 2 3 4 5 6 7 8 9 10 Sample ID AH 1 AH 2 AH 3 AH 4 AH 5 AH 6 AH 7 AH 8 AH 9 AH 10 (8) Depth 1M 1M 1M 1.1M 0.8M 1.5M 0.3M 1.1M 1.3M 1.1M Please see attached notes for all abbreviations and acronyms COC No / misc Containers B B B B B B B B B B Sample Date 02/06/2022 02/06/2022 02/06/2022 03/06/2022 03/06/2022 03/06/2022 02/06/2022 03/06/2022 04/06/2022 04/06/2022 Sample Type Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Antimony* 5 2 2 3 5 2 3 2 4 2 <1 mg/kg UK_TM30/UK_PM15 Arsenic* 10.0 5.9 4.6 6.8 6.0 4.1 6.1 3.0 5.1 1.6 <0.5 mg/kg UK_TM30/UK_PM15 Cadmium* <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg UK_TM30/UK_PM15 Chromium* 192.9 88.4 81.2 171.8 197.4 81.8 169.6 110.7 190.4 78.8 <0.5 mg/kg UK_TM30/UK_PM15 Cobalt* 25.0 16.5 10.8 32.0 25.2 14.5 25.0 18.5 10.3 7.6 <0.5 mg/kg UK_TM30/UK_PM15 Copper* 33 24 521AB 37 21 19 29 30 29 13 <1 mg/kg UK_TM30/UK_PM15 Iron* 51570AB 39370 35070 55880AB 43890 32340 44670 37180 49310 19340 <20 mg/kg UK_TM30/UK_PM15 Lead* 24 15 28 45 30 11 20 7 8 6 <5 mg/kg UK_TM30/UK_PM15 Manganese* 754 663 543 1003 1006 275 1076 445 166 132 <1 mg/kg UK_TM30/UK_PM15 Mercury* <0.1 <0.1 0.7 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg UK_TM30/UK_PM15 Nickel* 28.2 33.9 44.4 35.0 25.2 30.3 26.2 39.1 23.1 12.3 <0.7 mg/kg UK_TM30/UK_PM15 Selenium* 2 2 2 3 2 2 2 1 2 <1 <1 mg/kg UK_TM30/UK_PM15 Vanadium* 130 62 54 123 81 70 91 77 115 45 <1 mg/kg UK_TM30/UK_PM15 Zinc* 42 67 361 33 31 27 33 32 21 12 <5 mg/kg UK_TM30/UK_PM15 VOC MS Methyl Tertiary Butyl Ether <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/kg SA_TM15/SA_PM10 Vinyl Chloride <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/kg SA_TM15/SA_PM10 1,1-Dichloroethene (1,1 DCE) SA <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 trans-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 cis-1-2-Dichloroethene SA <3 <3 17 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Chloroform SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 SA Carbon tetrachloride <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2-Dichloroethane SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 Benzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Toluene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Chlorobenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 SA Ethylbenzene 3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Xylenes (sum of isomers) <8 <8 <8 <8 <8 <8 <8 <8 <8 <8 <8 ug/kg SA_TM15/SA_PM10 1,1,2,2-Tetrachloroethane <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 1,3,5-Trimethylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 1,2,4-Trimethylbenzene SA <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 1,4-Dichlorobenzene SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2-Dichlorobenzene SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2,4-Trichlorobenzene <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 ug/kg SA_TM15/SA_PM10 1,2,3-Trichlorobenzene <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 ug/kg SA_TM15/SA_PM10 1,2-Dichloroethene (cis & trans) <6 <6 17 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 Trichlorobenzenes (1,2,3 & 1,2,4) <14 <14 <14 <14 <14 <14 <14 <14 <14 <14 <14 ug/kg SA_TM15/SA_PM10 1,2,3-Trimethylbenzene <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM15/SA_PM10 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 2 of 15 Element Materials Technology Client Name: WSP Group Africa Report : Solid Reference: Location: Eskom Komati Project Solids: V=60g VOC jar, J=250g glass jar, T=plastic tub Contact: Noma Nyoka EMT Job No: 22/528 EMT Sample No. 1 2 3 4 5 6 7 8 9 10 Sample ID AH 1 AH 2 AH 3 AH 4 AH 5 AH 6 AH 7 AH 8 AH 9 AH 10 (8) Depth 1M 1M 1M 1.1M 0.8M 1.5M 0.3M 1.1M 1.3M 1.1M Please see attached notes for all abbreviations and acronyms COC No / misc Containers B B B B B B B B B B Sample Date 02/06/2022 02/06/2022 02/06/2022 03/06/2022 03/06/2022 03/06/2022 02/06/2022 03/06/2022 04/06/2022 04/06/2022 Sample Type Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 SVOC MS Phenols 2-Chlorophenol SA <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 SA 2,4,6-Trichlorophenol <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 PAHs Naphthalene SA 549 <10 <10 <10 <10 47 237 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Pyrene SA 127 <10 <10 <10 13 78070AC 124 14 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Benzo(a)pyrene SA 49 <10 <10 <10 <10 26723AC 162 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Other SVOCs Nitrobenzene SA <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 TPH CWG Aliphatics C7-C9 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg SA_TM36/SA_PM12 C10-C14 <4 <4 <4 <4 <4 55 <4 <4 <4 <4 <4 mg/kg SA_TM5/SA_PM8/PM16 C15-C36 <7 <7 <7 <7 <7 1278 <7 <7 <7 <7 <7 mg/kg SA_TM5/SA_PM8/PM16 Total aliphatics C7-C36 <12 <12 <12 <12 <12 1333 <12 <12 <12 <12 <12 mg/kg SA_TM5/TM36/SA_PM8/PM12/PM16 PCBs (Total vs Aroclor 1254) <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM17/SA_PM8 Natural Moisture Content 11.1 15.6 58.9 13.1 13.9 16.5 11.9 20.3 24.3 17.7 <0.1 % SA_PM4/SA_PM0 Fluoride 0.8 0.7 1.0 1.0 2.8 2.4 2.0 0.9 <0.3 <0.3 <0.3 mg/kg SA_TM27/SA_PM20 Chloride SA 7 8 21 3 6 5 5 9 3 <2 <2 mg/kg SA_TM27/SA_PM20 Nitrite as NO2 SA 1.8 <0.5 1.9 0.7 <0.5 <0.5 <0.5 <0.5 <0.5 0.5 <0.5 mg/kg SA_TM27/SA_PM20 Nitrate as NO3 SA <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 mg/kg SA_TM27/SA_PM20 Sulphate as SO4 (2:1 Ext) SA 4173AD 286 675AA 1228AC 61 116 512AA 248 217 117 <3 mg/kg SA_TM27/SA_PM20 SA Nitrite as N 0.5 <0.2 0.6 0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 mg/kg SA_TM27/SA_PM20 Nitrate as N SA <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 mg/kg SA_TM27/SA_PM20 Hexavalent Chromium* <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 mg/kg UK_TM38/UK_PM20 Chromium III* 192.9 88.4 81.2 171.8 197.4 81.8 169.6 110.7 190.4 78.8 <0.5 mg/kg UK_TM30/TM38/UK_PM15/PM20 Ammoniacal Nitrogen as N 1.4 <0.6 <0.6 <0.6 <0.6 1.5 <0.6 <0.6 <0.6 <0.6 <0.6 mg/kg SA_TM27/SA_PM20 Ammoniacal Nitrogen as NH4 1.8 <0.6 <0.6 <0.6 <0.6 1.9 <0.6 <0.6 <0.6 <0.6 <0.6 mg/kg SA_TM27/SA_PM20 Total Cyanide* <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 mg/kg UK_TM89/UK_PM45 Electrical Conductivity @25C (5:1 ext) 1224 140 589 374 117 163 300 192 187 <100 <100 uS/cm SA_TM28/SA_PM58 pH SA 7.13 7.29 7.56 7.54 7.92 7.83 7.78 7.76 6.34 5.45 <2.00 pH units SA_TM19/SA_PM11 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 3 of 15 Element Materials Technology Client Name: WSP Group Africa Report : Solid Reference: Location: Eskom Komati Project Solids: V=60g VOC jar, J=250g glass jar, T=plastic tub Contact: Noma Nyoka EMT Job No: 22/528 EMT Sample No. 11 12 13 14 15 16 17 18 19 20 Sample ID AH 11 AH 12 AH 13 AH 14 AH 15 AH 16 AH 17 AH 18 AH 19 AH 20 Depth 1.5M 1.5M 0.6M 1.1M 1M 0.3M 0.8M 1.7M 1.6M Please see attached notes for all abbreviations and acronyms COC No / misc Containers B B B B B B B B B B Sample Date 03/06/2022 03/06/2022 04/06/2022 04/06/2022 04/06/2022 04/06/2022 04/06/2022 04/06/2022 04/06/2022 03/06/2022 Sample Type Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Antimony* 5 4 3 5 3 5 5 3 3 4 <1 mg/kg UK_TM30/UK_PM15 Arsenic* 3.7 3.6 6.4 6.9 13.8 9.2 10.4 5.4 3.9 5.5 <0.5 mg/kg UK_TM30/UK_PM15 Cadmium* <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg UK_TM30/UK_PM15 Chromium* 198.8 142.0 168.4 208.5 77.5 236.8 195.8 134.2 114.1 169.6 <0.5 mg/kg UK_TM30/UK_PM15 Cobalt* 35.5 9.8 31.7 45.8 5.3 25.5 9.4 8.5 24.3 140.5 <0.5 mg/kg UK_TM30/UK_PM15 Copper* 21 20 42 41 246AB 41 56 37 30 30 <1 mg/kg UK_TM30/UK_PM15 Iron* 37430 40390 52830AB 79580AB 49030 68330AB 101500AB 56300AB 39520 54470AB <20 mg/kg UK_TM30/UK_PM15 Lead* 19 14 24 49 29 28 15 15 17 100 <5 mg/kg UK_TM30/UK_PM15 Manganese* 421 240 1209 983 121 850 45 66 831 1804 <1 mg/kg UK_TM30/UK_PM15 Mercury* 0.1 <0.1 <0.1 0.2 0.9 0.1 0.2 <0.1 0.1 <0.1 <0.1 mg/kg UK_TM30/UK_PM15 Nickel* 20.2 16.3 48.3 30.0 10.3 29.1 36.7 30.9 22.6 42.5 <0.7 mg/kg UK_TM30/UK_PM15 Selenium* 2 1 3 2 2 2 1 2 2 1 <1 mg/kg UK_TM30/UK_PM15 Vanadium* 85 87 128 169 47 159 177 122 76 92 <1 mg/kg UK_TM30/UK_PM15 Zinc* 19 18 38 24 13 30 25 21 24 18 <5 mg/kg UK_TM30/UK_PM15 VOC MS Methyl Tertiary Butyl Ether <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/kg SA_TM15/SA_PM10 Vinyl Chloride <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/kg SA_TM15/SA_PM10 1,1-Dichloroethene (1,1 DCE) SA <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 trans-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 cis-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Chloroform SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 SA Carbon tetrachloride <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2-Dichloroethane SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 Benzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Toluene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Chlorobenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 SA Ethylbenzene <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Xylenes (sum of isomers) <8 <8 <8 <8 <8 <8 <8 <8 <8 <8 <8 ug/kg SA_TM15/SA_PM10 1,1,2,2-Tetrachloroethane <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 1,3,5-Trimethylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 1,2,4-Trimethylbenzene SA <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 1,4-Dichlorobenzene SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2-Dichlorobenzene SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2,4-Trichlorobenzene <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 ug/kg SA_TM15/SA_PM10 1,2,3-Trichlorobenzene <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 ug/kg SA_TM15/SA_PM10 1,2-Dichloroethene (cis & trans) <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 Trichlorobenzenes (1,2,3 & 1,2,4) <14 <14 <14 <14 <14 <14 <14 <14 <14 <14 <14 ug/kg SA_TM15/SA_PM10 1,2,3-Trimethylbenzene <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM15/SA_PM10 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 4 of 15 Element Materials Technology Client Name: WSP Group Africa Report : Solid Reference: Location: Eskom Komati Project Solids: V=60g VOC jar, J=250g glass jar, T=plastic tub Contact: Noma Nyoka EMT Job No: 22/528 EMT Sample No. 11 12 13 14 15 16 17 18 19 20 Sample ID AH 11 AH 12 AH 13 AH 14 AH 15 AH 16 AH 17 AH 18 AH 19 AH 20 Depth 1.5M 1.5M 0.6M 1.1M 1M 0.3M 0.8M 1.7M 1.6M Please see attached notes for all abbreviations and acronyms COC No / misc Containers B B B B B B B B B B Sample Date 03/06/2022 03/06/2022 04/06/2022 04/06/2022 04/06/2022 04/06/2022 04/06/2022 04/06/2022 04/06/2022 03/06/2022 Sample Type Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 SVOC MS Phenols 2-Chlorophenol SA <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 SA 2,4,6-Trichlorophenol <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 PAHs Naphthalene SA <10 <10 <10 <10 337 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Pyrene SA <10 <10 <10 <10 72 19 <10 <10 18 <10 <10 ug/kg SA_TM16/SA_PM8 Benzo(a)pyrene SA <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Other SVOCs Nitrobenzene SA <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 TPH CWG Aliphatics C7-C9 <0.1 0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg SA_TM36/SA_PM12 C10-C14 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 mg/kg SA_TM5/SA_PM8/PM16 C15-C36 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 mg/kg SA_TM5/SA_PM8/PM16 Total aliphatics C7-C36 <12 <12 <12 <12 <12 <12 <12 <12 <12 <12 <12 mg/kg SA_TM5/TM36/SA_PM8/PM12/PM16 PCBs (Total vs Aroclor 1254) <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM17/SA_PM8 Natural Moisture Content 21.7 23.6 14.6 14.7 19.6 8.0 17.1 22.4 14.7 22.7 <0.1 % SA_PM4/SA_PM0 Fluoride <0.3 <0.3 0.4 <0.3 <0.3 <0.3 <0.3 <0.3 0.4 <0.3 <0.3 mg/kg SA_TM27/SA_PM20 Chloride SA 6 10 33 6 32 6 <2 5 19 7 <2 mg/kg SA_TM27/SA_PM20 Nitrite as NO2 SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 mg/kg SA_TM27/SA_PM20 Nitrate as NO3 SA <2.5 <2.5 <2.5 <2.5 6.8 <2.5 <2.5 <2.5 10.0 <2.5 <2.5 mg/kg SA_TM27/SA_PM20 Sulphate as SO4 (2:1 Ext) SA 311 185 534AA 338 4302AD 412 54 172 2723AD 51 <3 mg/kg SA_TM27/SA_PM20 SA Nitrite as N <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 mg/kg SA_TM27/SA_PM20 Nitrate as N SA <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 mg/kg SA_TM27/SA_PM20 Hexavalent Chromium* <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 mg/kg UK_TM38/UK_PM20 Chromium III* 198.8 142.0 168.4 208.5 77.5 236.8 195.8 134.2 114.1 169.6 <0.5 mg/kg UK_TM30/TM38/UK_PM15/PM20 Ammoniacal Nitrogen as N <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 mg/kg SA_TM27/SA_PM20 Ammoniacal Nitrogen as NH4 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 mg/kg SA_TM27/SA_PM20 Total Cyanide* <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 mg/kg UK_TM89/UK_PM45 Electrical Conductivity @25C (5:1 ext) 158 109 287 194 2640 222 <100 103 1047 <100 <100 uS/cm SA_TM28/SA_PM58 pH SA 5.48 5.33 6.31 6.60 6.76 6.96 6.59 6.13 7.00 6.92 <2.00 pH units SA_TM19/SA_PM11 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 5 of 15 Element Materials Technology Client Name: WSP Group Africa Report : Solid Reference: Location: Eskom Komati Project Solids: V=60g VOC jar, J=250g glass jar, T=plastic tub Contact: Noma Nyoka EMT Job No: 22/528 EMT Sample No. 21 22 23 24 25 26 27 28 29 30 Sample ID AH 21 AH 22 AH 23 AH 24 AH 25 BH 1 BH 2 BH 3 BH 4 BH 5 Depth 1.2M 1M 1.1M 1.1M 1.3M 1.5M 1M 1.5M 1M 1.5M Please see attached notes for all abbreviations and acronyms COC No / misc Containers B B B B B B B B B B Sample Date 04/06/2022 04/06/2022 03/06/2022 03/06/2022 03/06/2022 02/06/2022 02/06/2022 02/06/2022 01/06/2022 31/05/2022 Sample Type Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Antimony* <5AB <5AB <5AB 2 3 2 <1 <5AB 3 <5AB <1 mg/kg UK_TM30/UK_PM15 Arsenic* 28.6 14.0 14.8 2.6 4.5 3.2 3.5 7.6 3.0 9.3 <0.5 mg/kg UK_TM30/UK_PM15 Cadmium* <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg UK_TM30/UK_PM15 Chromium* 610.3AB 341.6AB 388.9AB 83.6 133.6 86.5 11.0 313.1AB 156.5 301.3AB <0.5 mg/kg UK_TM30/UK_PM15 Cobalt* 103.7 28.2 8.6 66.7 3.9 8.0 5.3 16.5 74.2 38.8 <0.5 mg/kg UK_TM30/UK_PM15 Copper* 99 63 48 20 19 21 14 40 28 47 <1 mg/kg UK_TM30/UK_PM15 Iron* 176900AB 127300AB 77500AB 31800 24840 29140 3903 77050AB 36030 88420AB <20 mg/kg UK_TM30/UK_PM15 Lead* 64 25 11 23 <5 <5 16 12 93 24 <5 mg/kg UK_TM30/UK_PM15 Manganese* 885 397 55 1104 21 104 70 238 2680AB 926 <1 mg/kg UK_TM30/UK_PM15 Mercury* 0.3 0.2 <0.1 <0.1 <0.1 <0.1 <0.1 0.2 0.1 <0.1 <0.1 mg/kg UK_TM30/UK_PM15 Nickel* 57.7 43.8 24.5 39.6 12.6 24.8 10.4 40.2 20.0 36.2 <0.7 mg/kg UK_TM30/UK_PM15 Selenium* 3 2 2 1 <1 1 <1 1 1 2 <1 mg/kg UK_TM30/UK_PM15 Vanadium* 371AB 247AB 293AB 76 140 71 22 175 97 202 <1 mg/kg UK_TM30/UK_PM15 Zinc* 28 22 13 21 9 24 16 21 18 26 <5 mg/kg UK_TM30/UK_PM15 VOC MS Methyl Tertiary Butyl Ether <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/kg SA_TM15/SA_PM10 Vinyl Chloride <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/kg SA_TM15/SA_PM10 1,1-Dichloroethene (1,1 DCE) SA <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 trans-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 cis-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Chloroform SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 SA Carbon tetrachloride <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2-Dichloroethane SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 Benzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Toluene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Chlorobenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 SA Ethylbenzene <3 <3 <3 <3 <3 <3 4 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Xylenes (sum of isomers) <8 <8 <8 <8 <8 <8 <8 <8 <8 <8 <8 ug/kg SA_TM15/SA_PM10 1,1,2,2-Tetrachloroethane <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 1,3,5-Trimethylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 1,2,4-Trimethylbenzene SA <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 1,4-Dichlorobenzene SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2-Dichlorobenzene SA <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2,4-Trichlorobenzene <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 ug/kg SA_TM15/SA_PM10 1,2,3-Trichlorobenzene <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 ug/kg SA_TM15/SA_PM10 1,2-Dichloroethene (cis & trans) <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 Trichlorobenzenes (1,2,3 & 1,2,4) <14 <14 <14 <14 <14 <14 <14 <14 <14 <14 <14 ug/kg SA_TM15/SA_PM10 1,2,3-Trimethylbenzene <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM15/SA_PM10 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 6 of 15 Element Materials Technology Client Name: WSP Group Africa Report : Solid Reference: Location: Eskom Komati Project Solids: V=60g VOC jar, J=250g glass jar, T=plastic tub Contact: Noma Nyoka EMT Job No: 22/528 EMT Sample No. 21 22 23 24 25 26 27 28 29 30 Sample ID AH 21 AH 22 AH 23 AH 24 AH 25 BH 1 BH 2 BH 3 BH 4 BH 5 Depth 1.2M 1M 1.1M 1.1M 1.3M 1.5M 1M 1.5M 1M 1.5M Please see attached notes for all abbreviations and acronyms COC No / misc Containers B B B B B B B B B B Sample Date 04/06/2022 04/06/2022 03/06/2022 03/06/2022 03/06/2022 02/06/2022 02/06/2022 02/06/2022 01/06/2022 31/05/2022 Sample Type Soil Soil Soil Soil Soil Soil Soil Soil Soil Soil Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 SVOC MS Phenols 2-Chlorophenol SA <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 SA 2,4,6-Trichlorophenol <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 PAHs Naphthalene SA <10 <10 <10 <10 <10 <10 934 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Pyrene SA <10 <10 <10 <10 <10 <10 540 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Benzo(a)pyrene SA <10 <10 <10 <10 <10 <10 321 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Other SVOCs Nitrobenzene SA <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 TPH CWG Aliphatics C7-C9 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg SA_TM36/SA_PM12 C10-C14 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 mg/kg SA_TM5/SA_PM8/PM16 C15-C36 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 <7 mg/kg SA_TM5/SA_PM8/PM16 Total aliphatics C7-C36 <12 <12 <12 <12 <12 <12 <12 <12 <12 <12 <12 mg/kg SA_TM5/TM36/SA_PM8/PM12/PM16 PCBs (Total vs Aroclor 1254) <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/kg SA_TM17/SA_PM8 Natural Moisture Content 10.2 18.4 14.1 16.9 18.7 13.2 7.7 14.6 24.7 15.2 <0.1 % SA_PM4/SA_PM0 Fluoride <0.3 <0.3 <0.3 <0.3 <0.3 1.3 0.4 0.4 <0.3 0.3 <0.3 mg/kg SA_TM27/SA_PM20 Chloride SA <2 3 4 6 2 3 2 9 17 74 <2 mg/kg SA_TM27/SA_PM20 Nitrite as NO2 SA <0.5 <0.5 <0.5 <0.5 0.9 1.2 <0.5 <0.5 <0.5 <0.5 <0.5 mg/kg SA_TM27/SA_PM20 Nitrate as NO3 SA <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 2.6 <2.5 mg/kg SA_TM27/SA_PM20 Sulphate as SO4 (2:1 Ext) SA 448AA 85 88 216 67 56 1997AC 280 34 584AB <3 mg/kg SA_TM27/SA_PM20 SA Nitrite as N <0.2 <0.2 <0.2 <0.2 0.3 0.4 <0.2 <0.2 <0.2 <0.2 <0.2 mg/kg SA_TM27/SA_PM20 Nitrate as N SA <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 mg/kg SA_TM27/SA_PM20 Hexavalent Chromium* <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 mg/kg UK_TM38/UK_PM20 Chromium III* 610.3AB 341.6AB 388.9AB 83.6 133.6 86.5 11.0 313.1AB 156.5 301.3AB <0.5 mg/kg UK_TM30/TM38/UK_PM15/PM20 Ammoniacal Nitrogen as N 1.0 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 mg/kg SA_TM27/SA_PM20 Ammoniacal Nitrogen as NH4 1.3 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 mg/kg SA_TM27/SA_PM20 Total Cyanide* <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 mg/kg UK_TM89/UK_PM45 Electrical Conductivity @25C (5:1 ext) 172 <100 <100 127 <100 <100 729 187 <100 228 <100 uS/cm SA_TM28/SA_PM58 pH SA 4.58 5.44 6.31 6.24 6.04 6.96 6.91 6.99 6.32 6.55 <2.00 pH units SA_TM19/SA_PM11 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 7 of 15 Element Materials Technology Client Name: WSP Group Africa Report : Solid Reference: Location: Eskom Komati Project Solids: V=60g VOC jar, J=250g glass jar, T=plastic tub Contact: Noma Nyoka EMT Job No: 22/528 EMT Sample No. 31 32 33 34 35 Sample ID BH 6 BH 7 BH 8 BH 9 BH 10 Depth 1.5M 2M 1M 1.5M 1.5M Please see attached notes for all abbreviations and acronyms COC No / misc Containers B B B B B Sample Date 31/05/2022 01/06/2022 01/06/2022 31/05/2022 30/05/2022 Sample Type Soil Soil Soil Soil Soil Batch Number 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Antimony* 1 2 <5AB 6 4 <1 mg/kg UK_TM30/UK_PM15 Arsenic* 1.6 1.9 23.0 10.1 8.0 <0.5 mg/kg UK_TM30/UK_PM15 Cadmium* <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg UK_TM30/UK_PM15 Chromium* 75.3 68.9 279.0AB 244.7 190.7 <0.5 mg/kg UK_TM30/UK_PM15 Cobalt* 3.6 7.4 69.5 58.1 121.2 <0.5 mg/kg UK_TM30/UK_PM15 Copper* 12 17 39 60 50 <1 mg/kg UK_TM30/UK_PM15 Iron* 12680 20020 92300AB 71270AB 68530AB <20 mg/kg UK_TM30/UK_PM15 Lead* <5 5 50 29 53 <5 mg/kg UK_TM30/UK_PM15 Manganese* 43 101 968 967 5196AB <1 mg/kg UK_TM30/UK_PM15 Mercury* <0.1 <0.1 0.2 0.1 0.2 <0.1 mg/kg UK_TM30/UK_PM15 Nickel* 15.6 18.3 60.6 51.0 59.5 <0.7 mg/kg UK_TM30/UK_PM15 Selenium* <1 <1 <1 1 3 <1 mg/kg UK_TM30/UK_PM15 Vanadium* 33 44 188 201 185 <1 mg/kg UK_TM30/UK_PM15 Zinc* 16 18 40 19 26 <5 mg/kg UK_TM30/UK_PM15 VOC MS Methyl Tertiary Butyl Ether <2 <2 <2 <2 <2 <2 ug/kg SA_TM15/SA_PM10 Vinyl Chloride <2 <2 <2 <2 <2 <2 ug/kg SA_TM15/SA_PM10 1,1-Dichloroethene (1,1 DCE) SA <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 trans-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 cis-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Chloroform SA <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 SA Carbon tetrachloride <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2-Dichloroethane SA <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 Benzene SA <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Toluene SA <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Chlorobenzene SA <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 SA Ethylbenzene <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 Xylenes (sum of isomers) <8 <8 <8 <8 <8 <8 ug/kg SA_TM15/SA_PM10 1,1,2,2-Tetrachloroethane <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 1,3,5-Trimethylbenzene SA <3 <3 <3 <3 <3 <3 ug/kg SA_TM15/SA_PM10 1,2,4-Trimethylbenzene SA <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 1,4-Dichlorobenzene SA <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2-Dichlorobenzene SA <4 <4 <4 <4 <4 <4 ug/kg SA_TM15/SA_PM10 1,2,4-Trichlorobenzene <7 <7 <7 <7 <7 <7 ug/kg SA_TM15/SA_PM10 1,2,3-Trichlorobenzene <7 <7 <7 <7 <7 <7 ug/kg SA_TM15/SA_PM10 1,2-Dichloroethene (cis & trans) <6 <6 <6 <6 <6 <6 ug/kg SA_TM15/SA_PM10 Trichlorobenzenes (1,2,3 & 1,2,4) <14 <14 <14 <14 <14 <14 ug/kg SA_TM15/SA_PM10 1,2,3-Trimethylbenzene <10 <10 <10 <10 <10 <10 ug/kg SA_TM15/SA_PM10 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 8 of 15 Element Materials Technology Client Name: WSP Group Africa Report : Solid Reference: Location: Eskom Komati Project Solids: V=60g VOC jar, J=250g glass jar, T=plastic tub Contact: Noma Nyoka EMT Job No: 22/528 EMT Sample No. 31 32 33 34 35 Sample ID BH 6 BH 7 BH 8 BH 9 BH 10 Depth 1.5M 2M 1M 1.5M 1.5M Please see attached notes for all abbreviations and acronyms COC No / misc Containers B B B B B Sample Date 31/05/2022 01/06/2022 01/06/2022 31/05/2022 30/05/2022 Sample Type Soil Soil Soil Soil Soil Batch Number 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 SVOC MS Phenols 2-Chlorophenol SA <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 SA 2,4,6-Trichlorophenol <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 PAHs Naphthalene SA <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Pyrene SA <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Benzo(a)pyrene SA <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 Other SVOCs Nitrobenzene SA <10 <10 <10 <10 <10 <10 ug/kg SA_TM16/SA_PM8 TPH CWG Aliphatics C7-C9 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 mg/kg SA_TM36/SA_PM12 C10-C14 <4 <4 <4 <4 <4 <4 mg/kg SA_TM5/SA_PM8/PM16 C15-C36 <7 <7 <7 <7 <7 <7 mg/kg SA_TM5/SA_PM8/PM16 Total aliphatics C7-C36 <12 <12 <12 <12 <12 <12 mg/kg SA_TM5/TM36/SA_PM8/PM12/PM16 PCBs (Total vs Aroclor 1254) <10 <10 <10 <10 <10 <10 ug/kg SA_TM17/SA_PM8 Natural Moisture Content 20.9 19.8 15.8 15.1 18.4 <0.1 % SA_PM4/SA_PM0 Fluoride <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 mg/kg SA_TM27/SA_PM20 Chloride SA 3 6 3 <2 4 <2 mg/kg SA_TM27/SA_PM20 Nitrite as NO2 SA 0.9 <0.5 <0.5 <0.5 <0.5 <0.5 mg/kg SA_TM27/SA_PM20 Nitrate as NO3 SA <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 mg/kg SA_TM27/SA_PM20 Sulphate as SO4 (2:1 Ext) SA 34 51 247 60 27 <3 mg/kg SA_TM27/SA_PM20 SA Nitrite as N 0.3 <0.2 <0.2 <0.2 <0.2 <0.2 mg/kg SA_TM27/SA_PM20 Nitrate as N SA <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 mg/kg SA_TM27/SA_PM20 Hexavalent Chromium* <0.3 <0.3 <0.3 <0.3 <0.3 <0.3 mg/kg UK_TM38/UK_PM20 Chromium III* 75.3 68.9 279.0AB 244.7 190.7 <0.5 mg/kg UK_TM30/TM38/UK_PM15/PM20 Ammoniacal Nitrogen as N <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 mg/kg SA_TM27/SA_PM20 Ammoniacal Nitrogen as NH4 <0.6 <0.6 <0.6 <0.6 <0.6 <0.6 mg/kg SA_TM27/SA_PM20 Total Cyanide* <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 mg/kg UK_TM89/UK_PM45 Electrical Conductivity @25C (5:1 ext) <100 <100 126 <100 <100 <100 uS/cm SA_TM28/SA_PM58 pH SA 6.91 6.46 6.73 6.44 7.21 <2.00 pH units SA_TM19/SA_PM11 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 9 of 15 Element Materials Technology Notification of Deviating Samples Client Name: WSP Group Africa Reference: Location: Eskom Komati Project Contact: Noma Nyoka EMT EMT Job Batch Sample ID Depth Sample Analysis Reason No. No. No deviating sample report results for job 22/528 Please note that only samples that are deviating are mentioned in this report. If no samples are listed it is because none were deviating. Only analyses which are accredited are recorded as deviating if set criteria are not met. QF-PM 3.1.11 v3 Please include all sections of this report if it is reproduced 10 of 15 NOTES TO ACCOMPANY ALL SCHEDULES AND REPORTS EMT Job No.: 22/528 SOILS and ASH Please note we are only MCERTS accredited (UK soils only) for sand, loam and clay and any other matrix is outside our scope of accreditation. Where an MCERTS report has been requested, you will be notified within 48 hours of any samples that have been identified as being outside our MCERTS scope. As validation has been performed on clay, sand and loam, only samples that are predominantly these matrices, or combinations of them will be within our MCERTS scope. If samples are not one of a combination of the above matrices they will not be marked as MCERTS accredited. It is assumed that you have taken representative samples on site and require analysis on a representative subsample. Stones will generally be included unless we are requested to remove them. All samples will be discarded one month after the date of reporting, unless we are instructed to the contrary. Asbestos samples are retained for 6 months. If you have not already done so, please send us a purchase order if this is required by your company. Where appropriate please make sure that our detection limits are suitable for your needs, if they are not, please notify us immediately. All analysis is reported on a dry weight basis unless stated otherwise. Limits of detection for analyses carried out on as received samples are not moisture content corrected. Results are not surrogate corrected. Samples are dried at 35°C ±5°C unless otherwise stated. Moisture content for CEN Leachate tests are dried at 105°C ±5°C. Ash samples are dried at 37°C ±5°C. Where Mineral Oil or Fats, Oils and Grease is quoted, this refers to Total Aliphatics C10-C40. Where a CEN 10:1 ZERO Headspace VOC test has been carried out, a 10:1 ratio of water to wet (as received) soil has been used. % Asbestos in Asbestos Containing Materials (ACMs) is determined by reference to HSG 264 The Survey Guide - Appendix 2 : ACMs in buildings listed in order of ease of fibre release. Sufficient amount of sample must be received to carry out the testing specified. Where an insufficient amount of sample has been received the testing may not meet the requirements of our accredited methods, as such accreditation may be removed. Negative Neutralization Potential (NP) values are obtained when the volume of NaOH (0.1N) titrated (pH 8.3) is greater than the volume of HCl (1N) to reduce the pH of the sample to 2.0 - 2.5. Any negative NP values are corrected to 0. The calculation of Pyrite content assumes that all oxidisable sulphides present in the sample are pyrite. This may not be the case. The calculation may be an overesitimate when other sulphides such as Barite (Barium Sulphate) are present. WATERS Please note we are not a UK Drinking Water Inspectorate (DWI) Approved Laboratory . ISO17025 accreditation applies to surface water and groundwater and usually one other matrix which is analysis specific, any other liquids are outside our scope of accreditation. As surface waters require different sample preparation to groundwaters the laboratory must be informed of the water type when submitting samples. Where Mineral Oil or Fats, Oils and Grease is quoted, this refers to Total Aliphatics C10-C40. STACK EMISSIONS Where an MCERTS report has been requested, you will be notified within 48 hours of any samples that have been identified as being outside our MCERTS scope. As validation for Dioxins and Furans and Dioxin like PCBs has been performed on XAD-2 Resin, only samples which use this resin will be within our MCERTS scope. Where appropriate please make sure that our detection limits are suitable for your needs, if they are not, please notify us immediately. DEVIATING SAMPLES All samples should be submitted to the laboratory in suitable containers with sufficient ice packs to sustain an appropriate temperature for the requested analysis. The temperature of sample receipt is recorded on the confirmation schedules in order that the client can make an informed decision as to whether testing should still be undertaken. SURROGATES Surrogate compounds are added during the preparation process to monitor recovery of analytes. However low recovery in soils is often due to peat, clay or other organic rich matrices. For waters this can be due to oxidants, surfactants, organic rich sediments or remediation fluids. Acceptable limits for most organic methods are 70 - 130% and for VOCs are 50 - 150%. When surrogate recoveries are outside the performance criteria but the associated AQC passes this is assumed to be due to matrix effect. Results are not surrogate corrected. DILUTIONS A dilution suffix indicates a dilution has been performed and the reported result takes this into account. No further calculation is required. BLANKS Where analytes have been found in the blank, the sample will be treated in accordance with our laboratory procedure for dealing with contaminated blanks. Please include all sections of this report if it is reproduced QF-PM 3.1.9 v34 All solid results are expressed on a dry weight basis unless stated otherwise. 11 of 15 EMT Job No.: 22/528 NOTE Data is only reported if the laboratory is confident that the data is a true reflection of the samples analysed. Data is only reported as accredited when all the requirements of our Quality System have been met. In certain circumstances where all the requirements of the Quality System have not been met, for instance if the associated AQC has failed, the reason is fully investigated and documented. The sample data is then evaluated alongside the other quality control checks performed during analysis to determine its suitability. Following this evaluation, provided the sample results have not been effected, the data is reported but accreditation is removed. It is a UKAS requirement for data not reported as accredited to be considered indicative only, but this does not mean the data is not valid. Where possible, and if requested, samples will be re-extracted and a revised report issued with accredited results. Please do not hesitate to contact the laboratory if further details are required of the circumstances which have led to the removal of accreditation. Laboratory records are kept for a period of no less than 6 years. REPORTS FROM THE SOUTH AFRICA LABORATORY Any method number not prefixed with SA has been undertaken in our UK laboratory unless reported as subcontracted. Measurement Uncertainty Measurement uncertainty defines the range of values that could reasonably be attributed to the measured quantity. This range of values has not been included within the reported results. Uncertainty expressed as a percentage can be provided upon request. Customer Provided Information Sample ID and depth is information provided by the customer. Please include all sections of this report if it is reproduced QF-PM 3.1.9 v34 All solid results are expressed on a dry weight basis unless stated otherwise. 12 of 15 ABBREVIATIONS and ACRONYMS USED # ISO17025 (UKAS Ref No. 4225) accredited - UK. SA ISO17025 (SANAS Ref No.T0729) accredited - South Africa B Indicates analyte found in associated method blank. DR Dilution required. M MCERTS accredited. NA Not applicable NAD No Asbestos Detected. ND None Detected (usually refers to VOC and/SVOC TICs). NDP No Determination Possible SS Calibrated against a single substance SV Surrogate recovery outside performance criteria. This may be due to a matrix effect. W Results expressed on as received basis. + AQC failure, accreditation has been removed from this result, if appropriate, see 'Note' on previous page. Results above calibration range, the result should be considered the minimum value. The actual result could be significantly >> higher, this result is not accredited. * Analysis subcontracted to an Element Materials Technology approved laboratory. AD Samples are dried at 35°C ±5°C CO Suspected carry over LOD/LOR Limit of Detection (Limit of Reporting) in line with ISO 17025 and MCERTS ME Matrix Effect NFD No Fibres Detected BS AQC Sample LB Blank Sample N Client Sample TB Trip Blank Sample OC Outside Calibration Range AA x2 Dilution AB x5 Dilution AC x10 Dilution AD x20 Dilution Please include all sections of this report if it is reproduced QF-PM 3.1.9 v34 All solid results are expressed on a dry weight basis unless stated otherwise. 13 of 15 Element Materials Technology Method Code Appendix EMT Job No: 22/528 ISO Analysis done Prep Method MCERTS Reported on 17025 on As Received Test Method No. Description No. (if Description (UK soils dry weight (UKAS/S (AR) or Dried appropriate) only) basis ANAS) (AD) Gravimetric measurement of Natural Moisture Content and % Moisture Content at either SA_PM4 SA_PM0 No preparation is required. AR 35°C or 105°C. Calculation based on ISO 11465 and BS1377. Modified USEPA 8260. Quantitative Determination of Volatile Organic Compounds by Modified US EPA method 5021. Preparation of solid and liquid samples for GC SA_TM15 Headspace GC-MS. SA_PM10 headspace analysis. AR Yes Modified USEPA 8260. Quantitative Determination of Volatile Organic Compounds by Modified US EPA method 5021. Preparation of solid and liquid samples for GC SA_TM15 Headspace GC-MS. SA_PM10 headspace analysis. Yes AR Yes Modified USEPA 8270. Quantitative determination of Semi-Volatile Organic compounds End over end extraction of solid samples for organic analysis. The solvent mix varies SA_TM16 (SVOCs) by GC-MS. SA_PM8 depending on analysis required. AR Yes Modified USEPA 8270. Quantitative determination of Semi-Volatile Organic compounds End over end extraction of solid samples for organic analysis. The solvent mix varies SA_TM16 (SVOCs) by GC-MS. SA_PM8 depending on analysis required. Yes AR Yes Modified US EPA method 8270. Determination of specific Polychlorinated Biphenyl End over end extraction of solid samples for organic analysis. The solvent mix varies SA_TM17 congeners by GC-MS. SA_PM8 depending on analysis required. AR Yes SA_TM19 Determination of pH by bench pH meter SA_PM11 Extraction of as received solid samples using one part solid to 2.5 parts deionised water. Yes AR No Extraction of dried and ground or as received samples with deionised water in a 2:1 water to solid ratio using a orbital shaker for all analytes except hexavalent chromium. SA_TM27 Major ions by Ion Chromatography SA_PM20 Extraction of as received sample using 10:1 ratio of 0.2M sodium hydroxide to soil for AD Yes hexavalent chromium using a orbital shaker. Extraction of dried and ground or as received samples with deionised water in a 2:1 water to solid ratio using a orbital shaker for all analytes except hexavalent chromium. SA_TM27 Major ions by Ion Chromatography SA_PM20 Extraction of as received sample using 10:1 ratio of 0.2M sodium hydroxide to soil for Yes AD Yes hexavalent chromium using a orbital shaker. Extraction of dried and ground or as received samples with deionised water in a 2:1 water to solid ratio using a orbital shaker for all analytes except hexavalent chromium. SA_TM27 Major ions by Ion Chromatography SA_PM20 Extraction of as received sample using 10:1 ratio of 0.2M sodium hydroxide to soil for AR Yes hexavalent chromium using a orbital shaker. QF-PM 3.1.10 v14 Please include all sections of this report if it is reproduced 14 of 15 Element Materials Technology Method Code Appendix EMT Job No: 22/528 ISO Analysis done Prep Method MCERTS Reported on 17025 on As Received Test Method No. Description No. (if Description (UK soils dry weight (UKAS/S (AR) or Dried appropriate) only) basis ANAS) (AD) Dried and ground solid samples are extracted with water in a 5:1 water to solid ratio, the SA_TM28 Determination of Electrical Conductivity with hand held manual conductivity probe. SA_PM58 samples are shaken on an orbital shaker. AD Yes Modified US EPA method 8015B. Determination of Gasoline Range Organics (GRO) in Modified US EPA method 5021. Preparation of solid and liquid samples for GC SA_TM36 the carbon chain range of C4-12, MTBE and BTEX by headspace GC-FID. SA_PM12 headspace analysis. AR Yes End over end extraction of solid samples for organic analysis. The solvent mix varies Modified USEPA 8015B method for the determination of solvent Extractable Petroleum SA_TM5 Hydrocarbons (EPH) with carbon banding within the range C8-C40 GC-FID. SA_PM8/PM16 depending on analysis required/Fractionation into aliphatic and aromatic fractions using a AR Yes Rapid Trace SPE. TM005: Modified USEPA 8015B. Determination of solvent Extractable Petroleum Hydrocarbons (EPH) including column fractionation in the carbon range of C10-35 into aliphatic and aromatic fractions by GC-FID. TM036: Modified USEPA 8015B. SA_TM5/TM36 Determination of Gasoline Range Organics (GRO) in the carbon chain range of C5-10 SA_PM8/PM12/PM16 please refer to SA_PM8/PM16 and SA_PM12 for method details AR Yes by headspace GC-FID. Including determination of BTEX and calculation of Aliphatic fractions. Determination of Trace Metal elements by ICP-OES (Inductively Coupled Plasma - Acid digestion of dried and ground solid samples using Aqua Regia refluxed at 112.5 °C. UK_TM30 Optical Emission Spectrometry). Modified US EPA Method 200.7, 6010B and BS EN ISO UK_PM15 Samples containing asbestos are not dried and ground. Yes 11885 2009 Acid digestion of dried and ground solid samples using Aqua Regia refluxed at 112.5 °C. Determination of Trace Metal elements by ICP-OES (Inductively Coupled Plasma - Samples containing asbestos are not dried and ground. / Extraction of dried and ground Optical Emission Spectrometry). Modified US EPA Method 200.7, 6010B and BS EN ISO or as received samples with deionised water in a 2:1 water to solid ratio using a UK_TM30/TM38 11885 2009 / Soluble Ion analysis using the Thermo Aquakem Photometric Automatic UK_PM15/PM20 reciprocal shaker for all analytes except hexavalent chromium. Extraction of as received Yes Analyser. Modified US EPA methods 325.2, 375.4, 365.2, 353.1, 354.1 sample using 10:1 ratio of 0.2M sodium hydroxide to soil for hexavalent chromium using a reciprocal shaker. Extraction of dried and ground or as received samples with deionised water in a 2:1 Soluble Ion analysis using the Thermo Aquakem Photometric Automatic Analyser. water to solid ratio using a reciprocal shaker for all analytes except hexavalent UK_TM38 Modified US EPA methods 325.2, 375.4, 365.2, 353.1, 354.1 UK_PM20 chromium. Extraction of as received sample using 10:1 ratio of 0.2M sodium hydroxide to Yes soil for hexavalent chromium using a reciprocal shaker. Modified USEPA method OIA-1667. Determination of cyanide by Flow Injection Analyser. As received solid samples are extracted with 1M NaOH by orbital shaker for Cyanide and UK_TM89 Where WAD cyanides are required a Ligand displacement step is carried out before UK_PM45 Thiocyanate analysis. Yes analysis. QF-PM 3.1.10 v14 Please include all sections of this report if it is reproduced 15 of 15 Element Materials Technology Unit D2 & D5 9 Quantum Road Firgrove Business Park W: www.element.com Somerset West 7130 South Africa WSP Group Africa Building C, Knightsbridge 33 Sloane Street Bryanston Johannesburg Gauteng South Africa 2191 Attention : Sarah Skinner Date : 29th June, 2022 Your reference : 41103965 Our reference : Test Report 22/556 Batch 1 Location : Eskom Komati Power Station (ESIA and WULA project) Date samples received : 10th June, 2022 Status : Final report Issue : 1 Eleven samples were received for analysis on 10th June, 2022 of which eleven were scheduled for analysis. Please find attached our Test Report which should be read with notes at the end of the report and should include all sections if reproduced. Interpretations and opinions are outside the scope of any accreditation, and all results relate only to samples supplied. All analysis is carried out on as received samples and reported on a dry weight basis unless stated otherwise. Results are not surrogate corrected. Analysis was undertaken at either Element Materials Technology UK, which is ISO 17025 accredited under UKAS (4225) or Element Materials Technology (SA) which is ISO 17025 accredited under SANAS (T0729) or a subcontract laboratory where specified. NOTE: Under International Laboratory Accreditation Cooperation (ILAC), ISO 17025 (UKAS) accreditation is recognised as equivalent to SANAS (South Africa) accreditation. Authorised By: Organics Laboratory: Inorganics Laboratory: Debbie van Wyk Greg Ondrejkovic Greg Ondrejkovic Technical Supervisor Technical Supervisor Please include all sections of this report if it is reproduced Element Materials Technology South Africa (Pty) Limited Registered Office: Unit D2/D5, 9 Quantum Road, Firgrove Business Park, Somerset West, Western Cape, 7130, South Africa Company Registration No: 2015/025446/07 1 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 1-9 10-14 15-21 22-28 29-35 36-42 43-49 50-56 57-63 64-70 Sample ID BH 1 BH 2 BH 3 BH 4 BH 5 BH 6 BH 7 BH 8 BH 9 BH 10 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G VPG V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G Sample Date 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Sample Type Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 Dissolved Antimony* <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l UK_TM170/UK_PM14 Dissolved Arsenic* <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 <0.9 ug/l UK_TM170/UK_PM14 Dissolved Cadmium* <0.03 <0.03 <0.03 <0.03 0.04 0.03 <0.03 0.04 <0.03 <0.03 <0.03 ug/l UK_TM170/UK_PM14 Total Dissolved Chromium* <0.2 4.3 <0.2 1.4 0.4 <0.2 <0.2 0.2 0.3 <0.2 <0.2 ug/l UK_TM170/UK_PM14 Dissolved Cobalt* 12.2 25.6 11.1 4.6 4.6 6.6 0.2 0.5 0.7 <0.1 <0.1 ug/l UK_TM170/UK_PM14 Dissolved Copper* <1 2 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l UK_TM170/UK_PM14 Total Dissolved Iron* 292.0 1692.1AB 164.4 492.9 12.6 25.6 11.2 7.9 43.9 9.9 <4.7 ug/l UK_TM170/UK_PM14 Dissolved Lead* 1.5 2.1 4.6 1.6 7.8 12.8 38.1 33.0 28.3 2.7 <0.4 ug/l UK_TM170/UK_PM14 Dissolved Manganese* 3269.5AB 1241.8AB 1718.3AB 114.8 809.5 496.8 15.7 68.8 18.3 6.8 <1.5 ug/l UK_TM170/UK_PM14 Dissolved Mercury* <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l UK_TM170/UK_PM14 Dissolved Nickel* 4.7 8.2 12.8 6.3 5.5 7.0 4.5 23.6 1.7 3.2 <0.2 ug/l UK_TM170/UK_PM14 Dissolved Selenium* <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 <1.2 ug/l UK_TM170/UK_PM14 Dissolved Vanadium* <0.6 4.8 1.0 1.5 1.1 <0.6 <0.6 <0.6 2.2 1.5 <0.6 ug/l UK_TM170/UK_PM14 Dissolved Zinc* 16.2 30.7 37.9 29.4 37.8 46.4 34.5 59.0 32.4 24.5 <1.5 ug/l UK_TM170/UK_PM14 Dissolved Calcium SA 73.1 27.7 141.0 11.0 46.3 42.4 13.6 83.0 17.0 8.0 <0.3 mg/l SA_TM27/SA_PM0 Dissolved Magnesium SA 50.0 22.5 125.4AB 11.2 26.4 34.6 9.1 74.3 11.2 5.0 <0.2 mg/l SA_TM27/SA_PM0 SA Dissolved Potassium 4.2 7.0 6.2 3.6 11.2 6.9 7.9 18.5 3.2 2.3 <0.1 mg/l SA_TM27/SA_PM0 Dissolved Sodium SA 71.6 85.8 136.4 15.2 82.6 44.2 26.3 48.4 46.5 25.6 <0.1 mg/l SA_TM27/SA_PM0 Dissolved Silicon* 21309AB 28801AB 19617AB 10607AB 8902 9616 6005 9986 23415AB 9350 <100 ug/l UK_TM30/UK_PM14 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 2 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 1-9 10-14 15-21 22-28 29-35 36-42 43-49 50-56 57-63 64-70 Sample ID BH 1 BH 2 BH 3 BH 4 BH 5 BH 6 BH 7 BH 8 BH 9 BH 10 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G VPG V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G Sample Date 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Sample Type Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 VOC MS Dichlorodifluoromethane <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Methyl Tertiary Butyl Ether <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 ug/l SA_TM15/SA_PM10 SA Chloromethane <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 Vinyl Chloride <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 ug/l SA_TM15/SA_PM10 Bromomethane <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM15/SA_PM10 Chloroethane SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 Trichlorofluoromethane SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 SA 1,1-Dichloroethene (1,1 DCE) <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 Dichloromethane (DCM) SA <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 ug/l SA_TM15/SA_PM10 trans-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 1,1-Dichloroethane SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 cis-1-2-Dichloroethene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 2,2-Dichloropropane <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM15/SA_PM10 Bromochloromethane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Chloroform SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 1,1,1-Trichloroethane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 SA 1,1-Dichloropropene <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 Carbon tetrachloride SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 1,2-Dichloroethane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Benzene <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM15/SA_PM10 Trichloroethene (TCE) SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 SA 1,2-Dichloropropane <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Dibromomethane SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 Bromodichloromethane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 cis-1-3-Dichloropropene <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Toluene SA <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 ug/l SA_TM15/SA_PM10 trans-1-3-Dichloropropene <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 1,1,2-Trichloroethane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Tetrachloroethene (PCE) SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 1,3-Dichloropropane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Dibromochloromethane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 1,2-Dibromoethane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Chlorobenzene SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 1,1,1,2-Tetrachloroethane SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Ethylbenzene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM15/SA_PM10 SA p/m-Xylene <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 o-Xylene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM15/SA_PM10 Styrene <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Bromoform SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 Isopropylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 1,1,2,2-Tetrachloroethane <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 <4 ug/l SA_TM15/SA_PM10 Bromobenzene SA <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 1,2,3-Trichloropropane SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 3 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 1-9 10-14 15-21 22-28 29-35 36-42 43-49 50-56 57-63 64-70 Sample ID BH 1 BH 2 BH 3 BH 4 BH 5 BH 6 BH 7 BH 8 BH 9 BH 10 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G VPG V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G Sample Date 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Sample Type Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 VOC MS Continued Propylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 2-Chlorotoluene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 SA 1,3,5-Trimethylbenzene <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 4-Chlorotoluene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 tert-Butylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 1,2,4-Trimethylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 sec-Butylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 SA 4-Isopropyltoluene <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 1,3-Dichlorobenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 1,4-Dichlorobenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 n-Butylbenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 1,2-Dichlorobenzene SA <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 1,2-Dibromo-3-chloropropane <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 1,2,4-Trichlorobenzene <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 Hexachlorobutadiene <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 Naphthalene <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 <2 ug/l SA_TM15/SA_PM10 1,2,3-Trichlorobenzene <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 <3 ug/l SA_TM15/SA_PM10 VOC TICs ND ND ND ND ND ND ND ND ND ND None SA_TM15/SA_PM10 SVOC MS Phenols 2-Chlorophenol <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 2-Methylphenol <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 2-Nitrophenol <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 2,4-Dichlorophenol <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 2,4-Dimethylphenol <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 2,4,5-Trichlorophenol <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 2,4,6-Trichlorophenol <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 4-Chloro-3-methylphenol <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 4-Methylphenol <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 4-Nitrophenol <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/l SA_TM16/SA_PM30 Pentachlorophenol <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Phenol <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 4 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 1-9 10-14 15-21 22-28 29-35 36-42 43-49 50-56 57-63 64-70 Sample ID BH 1 BH 2 BH 3 BH 4 BH 5 BH 6 BH 7 BH 8 BH 9 BH 10 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G VPG V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G Sample Date 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Sample Type Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 SVOC MS PAHs 2-Chloronaphthalene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 SA 2-Methylnaphthalene <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Naphthalene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Acenaphthylene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Acenaphthene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Fluorene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 SA Phenanthrene <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Anthracene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Fluoranthene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Pyrene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Benzo(a)anthracene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Chrysene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Benzo(b)fluoranthene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Benzo(k)fluoranthene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Benzo(a)pyrene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 SA Indeno(123cd)pyrene <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Dibenzo(ah)anthracene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Benzo(ghi)perylene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Phthalates Bis(2-ethylhexyl) phthalate SA <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 <5 ug/l SA_TM16/SA_PM30 Butylbenzyl phthalate <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Di-n-butyl phthalate SA <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 <1.5 ug/l SA_TM16/SA_PM30 Di-n-Octyl phthalate <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Diethyl phthalate SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Dimethyl phthalate SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 5 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 1-9 10-14 15-21 22-28 29-35 36-42 43-49 50-56 57-63 64-70 Sample ID BH 1 BH 2 BH 3 BH 4 BH 5 BH 6 BH 7 BH 8 BH 9 BH 10 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G VPG V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G Sample Date 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Sample Type Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 SVOC MS Other SVOCs 1,2-Dichlorobenzene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 SA 1,2,4-Trichlorobenzene <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 1,3-Dichlorobenzene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 1,4-Dichlorobenzene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 2-Nitroaniline <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 2,4-Dinitrotoluene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 2,6-Dinitrotoluene <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 3-Nitroaniline <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 4-Bromophenylphenylether SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 4-Chloroaniline <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 4-Chlorophenylphenylether SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 4-Nitroaniline <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Azobenzene SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Bis(2-chloroethoxy)methane SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Bis(2-chloroethyl)ether SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 SA Carbazole <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Dibenzofuran SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Hexachlorobenzene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Hexachlorobutadiene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Hexachlorocyclopentadiene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 SA Hexachloroethane <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 Isophorone SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 N-nitrosodi-n-propylamine SA <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 ug/l SA_TM16/SA_PM30 Nitrobenzene SA <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 ug/l SA_TM16/SA_PM30 SVOC TICs ND ND ND ND ND ND ND ND ND ND None SA_TM16/SA_PM30 TPH CWG Aliphatics C7-C9 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/l SA_TM36/SA_PM12 C10-C14 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/l SA_TM5/SA_PM16/PM30 C15-C36 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/l SA_TM5/SA_PM16/PM30 Total aliphatics C7-C36 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 <10 ug/l SA_TM5/TM36/SA_PM12/PM16/PM30 PCBs (Total vs Aroclor 1254) <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 <0.2 ug/l SA_TM17/SA_PM30 Fluoride SA 0.4 <0.3 0.3 <0.3 <0.3 <0.3 <0.3 <0.3 0.3 <0.3 <0.3 mg/l SA_TM27/SA_PM0 Chloride SA 32.1 22.1 73.9 53.0 67.6 19.0 29.7 25.6 3.4 11.7 <0.3 mg/l SA_TM27/SA_PM0 Sulphate SA 133.1 183.6AA 983.1AB 5.4 213.0AA 234.8AA 67.3 446.0AB 51.1 55.4 <0.5 mg/l SA_TM27/SA_PM0 SA Nitrate as N <0.05 <0.05 <0.05 <0.05 <0.05 0.11 0.36 <0.05 1.27 <0.05 <0.05 mg/l SA_TM27/SA_PM0 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 6 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 1-9 10-14 15-21 22-28 29-35 36-42 43-49 50-56 57-63 64-70 Sample ID BH 1 BH 2 BH 3 BH 4 BH 5 BH 6 BH 7 BH 8 BH 9 BH 10 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G VPG V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G V HN P G Sample Date 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 07/06/2022 Sample Type Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Ground Water Batch Number 1 1 1 1 1 1 1 1 1 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 10/06/2022 Ortho Phosphate as P 0.046 0.039 0.055 0.033 0.029 0.023 0.036 0.046 0.039 0.026 <0.015 mg/l SA_TM191/SA_PM31 Ammoniacal Nitrogen as N SA 2.60 0.47 0.75 <0.03 0.47 0.19 <0.03 0.05 <0.03 <0.03 <0.03 mg/l SA_TM27/SA_PM0 Hexavalent Chromium* <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 <0.006 mg/l UK_TM38/UK_PM0 Total Alkalinity as CaCO3 SA 396 132 260 18 92 64 23 116 124 20 <3 mg/l SA_TM32/SA_PM0 Electrical Conductivity @25C SA 981 684 1849 248 835 679 304 1133 370 125 <2 uS/cm SA_TM28/SA_PM0 SA pH 7.44 7.44 7.25 7.10 7.54 6.67 7.00 7.42 7.54 6.62 <2.00 pH units SA_TM19/SA_PM0 Total Dissolved Solids SA 616 541 1537 205 563 486 187 894 250 136 <35 mg/l SA_TM20/SA_PM31 Total Organic Carbon* <2 <2 <2 <2 <2 <2 <2 2 <2 <2 <2 mg/l UK_TM60/UK_PM0 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 7 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 71-77 Sample ID BH 10-01 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G Sample Date 07/06/2022 Sample Type Ground Water Batch Number 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 Dissolved Antimony* <2 <2 ug/l UK_TM170/UK_PM14 Dissolved Arsenic* <0.9 <0.9 ug/l UK_TM170/UK_PM14 Dissolved Cadmium* <0.03 <0.03 ug/l UK_TM170/UK_PM14 Total Dissolved Chromium* <0.2 <0.2 ug/l UK_TM170/UK_PM14 Dissolved Cobalt* 11.0 <0.1 ug/l UK_TM170/UK_PM14 Dissolved Copper* <1 <1 ug/l UK_TM170/UK_PM14 Total Dissolved Iron* 163.7 <4.7 ug/l UK_TM170/UK_PM14 Dissolved Lead* 4.6 <0.4 ug/l UK_TM170/UK_PM14 Dissolved Manganese* 1639.4AB <1.5 ug/l UK_TM170/UK_PM14 Dissolved Mercury* <0.5 <0.5 ug/l UK_TM170/UK_PM14 Dissolved Nickel* 12.6 <0.2 ug/l UK_TM170/UK_PM14 Dissolved Selenium* <1.2 <1.2 ug/l UK_TM170/UK_PM14 Dissolved Vanadium* 1.0 <0.6 ug/l UK_TM170/UK_PM14 Dissolved Zinc* 37.0 <1.5 ug/l UK_TM170/UK_PM14 Dissolved Calcium SA 141.5 <0.3 mg/l SA_TM27/SA_PM0 Dissolved Magnesium SA 116.5AB <0.2 mg/l SA_TM27/SA_PM0 SA Dissolved Potassium 6.0 <0.1 mg/l SA_TM27/SA_PM0 Dissolved Sodium SA 137.1 <0.1 mg/l SA_TM27/SA_PM0 Dissolved Silicon* 20135AB <100 ug/l UK_TM30/UK_PM14 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 8 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 71-77 Sample ID BH 10-01 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G Sample Date 07/06/2022 Sample Type Ground Water Batch Number 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 VOC MS Dichlorodifluoromethane <2 <2 ug/l SA_TM15/SA_PM10 Methyl Tertiary Butyl Ether <0.1 <0.1 ug/l SA_TM15/SA_PM10 SA Chloromethane <3 <3 ug/l SA_TM15/SA_PM10 Vinyl Chloride <0.1 <0.1 ug/l SA_TM15/SA_PM10 Bromomethane <1 <1 ug/l SA_TM15/SA_PM10 Chloroethane SA <3 <3 ug/l SA_TM15/SA_PM10 Trichlorofluoromethane SA <3 <3 ug/l SA_TM15/SA_PM10 SA 1,1-Dichloroethene (1,1 DCE) <3 <3 ug/l SA_TM15/SA_PM10 Dichloromethane (DCM) SA <5 <5 ug/l SA_TM15/SA_PM10 trans-1-2-Dichloroethene SA <3 <3 ug/l SA_TM15/SA_PM10 1,1-Dichloroethane SA <3 <3 ug/l SA_TM15/SA_PM10 cis-1-2-Dichloroethene SA <3 <3 ug/l SA_TM15/SA_PM10 2,2-Dichloropropane <1 <1 ug/l SA_TM15/SA_PM10 Bromochloromethane SA <2 <2 ug/l SA_TM15/SA_PM10 Chloroform SA <2 <2 ug/l SA_TM15/SA_PM10 1,1,1-Trichloroethane SA <2 <2 ug/l SA_TM15/SA_PM10 SA 1,1-Dichloropropene <3 <3 ug/l SA_TM15/SA_PM10 Carbon tetrachloride SA <2 <2 ug/l SA_TM15/SA_PM10 1,2-Dichloroethane SA <2 <2 ug/l SA_TM15/SA_PM10 Benzene <0.5 <0.5 ug/l SA_TM15/SA_PM10 Trichloroethene (TCE) SA <3 <3 ug/l SA_TM15/SA_PM10 SA 1,2-Dichloropropane <2 <2 ug/l SA_TM15/SA_PM10 Dibromomethane SA <3 <3 ug/l SA_TM15/SA_PM10 Bromodichloromethane SA <2 <2 ug/l SA_TM15/SA_PM10 cis-1-3-Dichloropropene <2 <2 ug/l SA_TM15/SA_PM10 Toluene SA <5 <5 ug/l SA_TM15/SA_PM10 trans-1-3-Dichloropropene <2 <2 ug/l SA_TM15/SA_PM10 1,1,2-Trichloroethane SA <2 <2 ug/l SA_TM15/SA_PM10 Tetrachloroethene (PCE) SA <3 <3 ug/l SA_TM15/SA_PM10 1,3-Dichloropropane SA <2 <2 ug/l SA_TM15/SA_PM10 Dibromochloromethane SA <2 <2 ug/l SA_TM15/SA_PM10 1,2-Dibromoethane SA <2 <2 ug/l SA_TM15/SA_PM10 Chlorobenzene SA <2 <2 ug/l SA_TM15/SA_PM10 1,1,1,2-Tetrachloroethane SA <2 <2 ug/l SA_TM15/SA_PM10 Ethylbenzene SA <1 <1 ug/l SA_TM15/SA_PM10 SA p/m-Xylene <2 <2 ug/l SA_TM15/SA_PM10 o-Xylene SA <1 <1 ug/l SA_TM15/SA_PM10 Styrene <2 <2 ug/l SA_TM15/SA_PM10 Bromoform SA <2 <2 ug/l SA_TM15/SA_PM10 Isopropylbenzene SA <3 <3 ug/l SA_TM15/SA_PM10 1,1,2,2-Tetrachloroethane <4 <4 ug/l SA_TM15/SA_PM10 Bromobenzene SA <2 <2 ug/l SA_TM15/SA_PM10 1,2,3-Trichloropropane SA <3 <3 ug/l SA_TM15/SA_PM10 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 9 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 71-77 Sample ID BH 10-01 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G Sample Date 07/06/2022 Sample Type Ground Water Batch Number 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 VOC MS Continued Propylbenzene SA <3 <3 ug/l SA_TM15/SA_PM10 2-Chlorotoluene SA <3 <3 ug/l SA_TM15/SA_PM10 SA 1,3,5-Trimethylbenzene <3 <3 ug/l SA_TM15/SA_PM10 4-Chlorotoluene SA <3 <3 ug/l SA_TM15/SA_PM10 tert-Butylbenzene SA <3 <3 ug/l SA_TM15/SA_PM10 1,2,4-Trimethylbenzene SA <3 <3 ug/l SA_TM15/SA_PM10 sec-Butylbenzene SA <3 <3 ug/l SA_TM15/SA_PM10 SA 4-Isopropyltoluene <3 <3 ug/l SA_TM15/SA_PM10 1,3-Dichlorobenzene SA <3 <3 ug/l SA_TM15/SA_PM10 1,4-Dichlorobenzene SA <3 <3 ug/l SA_TM15/SA_PM10 n-Butylbenzene SA <3 <3 ug/l SA_TM15/SA_PM10 1,2-Dichlorobenzene SA <3 <3 ug/l SA_TM15/SA_PM10 1,2-Dibromo-3-chloropropane <2 <2 ug/l SA_TM15/SA_PM10 1,2,4-Trichlorobenzene <3 <3 ug/l SA_TM15/SA_PM10 Hexachlorobutadiene <3 <3 ug/l SA_TM15/SA_PM10 Naphthalene <2 <2 ug/l SA_TM15/SA_PM10 1,2,3-Trichlorobenzene <3 <3 ug/l SA_TM15/SA_PM10 VOC TICs ND None SA_TM15/SA_PM10 SVOC MS Phenols 2-Chlorophenol <1 <1 ug/l SA_TM16/SA_PM30 2-Methylphenol <0.5 <0.5 ug/l SA_TM16/SA_PM30 2-Nitrophenol <0.5 <0.5 ug/l SA_TM16/SA_PM30 2,4-Dichlorophenol <0.5 <0.5 ug/l SA_TM16/SA_PM30 2,4-Dimethylphenol <1 <1 ug/l SA_TM16/SA_PM30 2,4,5-Trichlorophenol <0.5 <0.5 ug/l SA_TM16/SA_PM30 2,4,6-Trichlorophenol <1 <1 ug/l SA_TM16/SA_PM30 4-Chloro-3-methylphenol <0.5 <0.5 ug/l SA_TM16/SA_PM30 4-Methylphenol <1 <1 ug/l SA_TM16/SA_PM30 4-Nitrophenol <10 <10 ug/l SA_TM16/SA_PM30 Pentachlorophenol <1 <1 ug/l SA_TM16/SA_PM30 Phenol <1 <1 ug/l SA_TM16/SA_PM30 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 10 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 71-77 Sample ID BH 10-01 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G Sample Date 07/06/2022 Sample Type Ground Water Batch Number 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 SVOC MS PAHs 2-Chloronaphthalene SA <1 <1 ug/l SA_TM16/SA_PM30 SA 2-Methylnaphthalene <1 <1 ug/l SA_TM16/SA_PM30 Naphthalene SA <1 <1 ug/l SA_TM16/SA_PM30 Acenaphthylene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Acenaphthene SA <1 <1 ug/l SA_TM16/SA_PM30 Fluorene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 SA Phenanthrene <0.5 <0.5 ug/l SA_TM16/SA_PM30 Anthracene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Fluoranthene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Pyrene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Benzo(a)anthracene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Chrysene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Benzo(b)fluoranthene SA <1 <1 ug/l SA_TM16/SA_PM30 Benzo(k)fluoranthene SA <1 <1 ug/l SA_TM16/SA_PM30 Benzo(a)pyrene SA <1 <1 ug/l SA_TM16/SA_PM30 SA Indeno(123cd)pyrene <1 <1 ug/l SA_TM16/SA_PM30 Dibenzo(ah)anthracene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Benzo(ghi)perylene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Phthalates Bis(2-ethylhexyl) phthalate SA <5 <5 ug/l SA_TM16/SA_PM30 Butylbenzyl phthalate <1 <1 ug/l SA_TM16/SA_PM30 Di-n-butyl phthalate SA <1.5 <1.5 ug/l SA_TM16/SA_PM30 Di-n-Octyl phthalate <1 <1 ug/l SA_TM16/SA_PM30 Diethyl phthalate SA <1 <1 ug/l SA_TM16/SA_PM30 Dimethyl phthalate SA <1 <1 ug/l SA_TM16/SA_PM30 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 11 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 71-77 Sample ID BH 10-01 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G Sample Date 07/06/2022 Sample Type Ground Water Batch Number 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 SVOC MS Other SVOCs 1,2-Dichlorobenzene SA <1 <1 ug/l SA_TM16/SA_PM30 SA 1,2,4-Trichlorobenzene <1 <1 ug/l SA_TM16/SA_PM30 1,3-Dichlorobenzene SA <1 <1 ug/l SA_TM16/SA_PM30 1,4-Dichlorobenzene SA <1 <1 ug/l SA_TM16/SA_PM30 2-Nitroaniline <1 <1 ug/l SA_TM16/SA_PM30 2,4-Dinitrotoluene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 2,6-Dinitrotoluene <1 <1 ug/l SA_TM16/SA_PM30 3-Nitroaniline <1 <1 ug/l SA_TM16/SA_PM30 4-Bromophenylphenylether SA <1 <1 ug/l SA_TM16/SA_PM30 4-Chloroaniline <1 <1 ug/l SA_TM16/SA_PM30 4-Chlorophenylphenylether SA <1 <1 ug/l SA_TM16/SA_PM30 4-Nitroaniline <0.5 <0.5 ug/l SA_TM16/SA_PM30 Azobenzene SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Bis(2-chloroethoxy)methane SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Bis(2-chloroethyl)ether SA <1 <1 ug/l SA_TM16/SA_PM30 SA Carbazole <0.5 <0.5 ug/l SA_TM16/SA_PM30 Dibenzofuran SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Hexachlorobenzene SA <1 <1 ug/l SA_TM16/SA_PM30 Hexachlorobutadiene SA <1 <1 ug/l SA_TM16/SA_PM30 Hexachlorocyclopentadiene SA <1 <1 ug/l SA_TM16/SA_PM30 SA Hexachloroethane <1 <1 ug/l SA_TM16/SA_PM30 Isophorone SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 N-nitrosodi-n-propylamine SA <0.5 <0.5 ug/l SA_TM16/SA_PM30 Nitrobenzene SA <1 <1 ug/l SA_TM16/SA_PM30 SVOC TICs ND None SA_TM16/SA_PM30 TPH CWG Aliphatics C7-C9 <10 <10 ug/l SA_TM36/SA_PM12 C10-C14 <10 <10 ug/l SA_TM5/SA_PM16/PM30 C15-C36 <10 <10 ug/l SA_TM5/SA_PM16/PM30 Total aliphatics C7-C36 <10 <10 ug/l SA_TM5/TM36/SA_PM12/PM16/PM30 PCBs (Total vs Aroclor 1254) <0.2 <0.2 ug/l SA_TM17/SA_PM30 Fluoride SA 0.4 <0.3 mg/l SA_TM27/SA_PM0 Chloride SA 69.9 <0.3 mg/l SA_TM27/SA_PM0 Sulphate SA 837.9AB <0.5 mg/l SA_TM27/SA_PM0 SA Nitrate as N <0.05 <0.05 mg/l SA_TM27/SA_PM0 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 12 of 19 Element Materials Technology Client Name: WSP Group Africa Report : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner Liquids/products: V=40ml vial, G=glass bottle, P=plastic bottle EMT Job No: 22/556 H=H2SO4, Z=ZnAc, N=NaOH, HN=HN03 EMT Sample No. 71-77 Sample ID BH 10-01 Depth Please see attached notes for all abbreviations and acronyms COC No / misc Containers V HN P G Sample Date 07/06/2022 Sample Type Ground Water Batch Number 1 Method LOD/LOR Units No. Date of Receipt 10/06/2022 Ortho Phosphate as P 0.042 <0.015 mg/l SA_TM191/SA_PM31 Ammoniacal Nitrogen as N SA 0.36 <0.03 mg/l SA_TM27/SA_PM0 Hexavalent Chromium* <0.006 <0.006 mg/l UK_TM38/UK_PM0 Total Alkalinity as CaCO3 SA 256 <3 mg/l SA_TM32/SA_PM0 Electrical Conductivity @25C SA 1850 <2 uS/cm SA_TM28/SA_PM0 SA pH 6.62 <2.00 pH units SA_TM19/SA_PM0 Total Dissolved Solids SA 1533 <35 mg/l SA_TM20/SA_PM31 Total Organic Carbon* <2 <2 mg/l UK_TM60/UK_PM0 Please include all sections of this report if it is reproduced QF-PM 3.1.2 v11 All solid results are expressed on a dry weight basis unless stated otherwise. 13 of 19 Element Materials Technology Notification of Deviating Samples Client Name: WSP Group Africa Matrix : Liquid Reference: 41103965 Location: Eskom Komati Power Station (ESIA and WULA project) Contact: Sarah Skinner EMT EMT Job Batch Sample ID Depth Sample Analysis Reason No. No. 22/556 1 BH 1 1-9 SVOC Sample holding time exceeded 22/556 1 BH 2 10-14 SVOC Sample holding time exceeded 22/556 1 BH 3 15-21 SVOC Sample holding time exceeded 22/556 1 BH 4 22-28 SVOC Sample holding time exceeded 22/556 1 BH 5 29-35 SVOC Sample holding time exceeded 22/556 1 BH 6 36-42 SVOC Sample holding time exceeded 22/556 1 BH 7 43-49 SVOC Sample holding time exceeded 22/556 1 BH 8 50-56 SVOC Sample holding time exceeded 22/556 1 BH 9 57-63 SVOC Sample holding time exceeded 22/556 1 BH 10 64-70 SVOC Sample holding time exceeded 22/556 1 BH 10-01 71-77 SVOC Sample holding time exceeded Please note that only samples that are deviating are mentioned in this report. If no samples are listed it is because none were deviating. Only analyses which are accredited are recorded as deviating if set criteria are not met. QF-PM 3.1.11 v3 Please include all sections of this report if it is reproduced 14 of 19 NOTES TO ACCOMPANY ALL SCHEDULES AND REPORTS EMT Job No.: 22/556 SOILS and ASH Please note we are only MCERTS accredited (UK soils only) for sand, loam and clay and any other matrix is outside our scope of accreditation. Where an MCERTS report has been requested, you will be notified within 48 hours of any samples that have been identified as being outside our MCERTS scope. As validation has been performed on clay, sand and loam, only samples that are predominantly these matrices, or combinations of them will be within our MCERTS scope. If samples are not one of a combination of the above matrices they will not be marked as MCERTS accredited. It is assumed that you have taken representative samples on site and require analysis on a representative subsample. Stones will generally be included unless we are requested to remove them. All samples will be discarded one month after the date of reporting, unless we are instructed to the contrary. Asbestos samples are retained for 6 months. If you have not already done so, please send us a purchase order if this is required by your company. Where appropriate please make sure that our detection limits are suitable for your needs, if they are not, please notify us immediately. All analysis is reported on a dry weight basis unless stated otherwise. Limits of detection for analyses carried out on as received samples are not moisture content corrected. Results are not surrogate corrected. Samples are dried at 35°C ±5°C unless otherwise stated. Moisture content for CEN Leachate tests are dried at 105°C ±5°C. Ash samples are dried at 37°C ±5°C. Where Mineral Oil or Fats, Oils and Grease is quoted, this refers to Total Aliphatics C10-C40. Where a CEN 10:1 ZERO Headspace VOC test has been carried out, a 10:1 ratio of water to wet (as received) soil has been used. % Asbestos in Asbestos Containing Materials (ACMs) is determined by reference to HSG 264 The Survey Guide - Appendix 2 : ACMs in buildings listed in order of ease of fibre release. Sufficient amount of sample must be received to carry out the testing specified. Where an insufficient amount of sample has been received the testing may not meet the requirements of our accredited methods, as such accreditation may be removed. Negative Neutralization Potential (NP) values are obtained when the volume of NaOH (0.1N) titrated (pH 8.3) is greater than the volume of HCl (1N) to reduce the pH of the sample to 2.0 - 2.5. Any negative NP values are corrected to 0. The calculation of Pyrite content assumes that all oxidisable sulphides present in the sample are pyrite. This may not be the case. The calculation may be an overesitimate when other sulphides such as Barite (Barium Sulphate) are present. WATERS Please note we are not a UK Drinking Water Inspectorate (DWI) Approved Laboratory . ISO17025 accreditation applies to surface water and groundwater and usually one other matrix which is analysis specific, any other liquids are outside our scope of accreditation. As surface waters require different sample preparation to groundwaters the laboratory must be informed of the water type when submitting samples. Where Mineral Oil or Fats, Oils and Grease is quoted, this refers to Total Aliphatics C10-C40. STACK EMISSIONS Where an MCERTS report has been requested, you will be notified within 48 hours of any samples that have been identified as being outside our MCERTS scope. As validation for Dioxins and Furans and Dioxin like PCBs has been performed on XAD-2 Resin, only samples which use this resin will be within our MCERTS scope. Where appropriate please make sure that our detection limits are suitable for your needs, if they are not, please notify us immediately. DEVIATING SAMPLES All samples should be submitted to the laboratory in suitable containers with sufficient ice packs to sustain an appropriate temperature for the requested analysis. The temperature of sample receipt is recorded on the confirmation schedules in order that the client can make an informed decision as to whether testing should still be undertaken. SURROGATES Surrogate compounds are added during the preparation process to monitor recovery of analytes. However low recovery in soils is often due to peat, clay or other organic rich matrices. For waters this can be due to oxidants, surfactants, organic rich sediments or remediation fluids. Acceptable limits for most organic methods are 70 - 130% and for VOCs are 50 - 150%. When surrogate recoveries are outside the performance criteria but the associated AQC passes this is assumed to be due to matrix effect. Results are not surrogate corrected. DILUTIONS A dilution suffix indicates a dilution has been performed and the reported result takes this into account. No further calculation is required. BLANKS Where analytes have been found in the blank, the sample will be treated in accordance with our laboratory procedure for dealing with contaminated blanks. Please include all sections of this report if it is reproduced QF-PM 3.1.9 v34 All solid results are expressed on a dry weight basis unless stated otherwise. 15 of 19 EMT Job No.: 22/556 NOTE Data is only reported if the laboratory is confident that the data is a true reflection of the samples analysed. Data is only reported as accredited when all the requirements of our Quality System have been met. In certain circumstances where all the requirements of the Quality System have not been met, for instance if the associated AQC has failed, the reason is fully investigated and documented. The sample data is then evaluated alongside the other quality control checks performed during analysis to determine its suitability. Following this evaluation, provided the sample results have not been effected, the data is reported but accreditation is removed. It is a UKAS requirement for data not reported as accredited to be considered indicative only, but this does not mean the data is not valid. Where possible, and if requested, samples will be re-extracted and a revised report issued with accredited results. Please do not hesitate to contact the laboratory if further details are required of the circumstances which have led to the removal of accreditation. Laboratory records are kept for a period of no less than 6 years. REPORTS FROM THE SOUTH AFRICA LABORATORY Any method number not prefixed with SA has been undertaken in our UK laboratory unless reported as subcontracted. Measurement Uncertainty Measurement uncertainty defines the range of values that could reasonably be attributed to the measured quantity. This range of values has not been included within the reported results. Uncertainty expressed as a percentage can be provided upon request. Customer Provided Information Sample ID and depth is information provided by the customer. Please include all sections of this report if it is reproduced QF-PM 3.1.9 v34 All solid results are expressed on a dry weight basis unless stated otherwise. 16 of 19 ABBREVIATIONS and ACRONYMS USED # ISO17025 (UKAS Ref No. 4225) accredited - UK. SA ISO17025 (SANAS Ref No.T0729) accredited - South Africa B Indicates analyte found in associated method blank. DR Dilution required. M MCERTS accredited. NA Not applicable NAD No Asbestos Detected. ND None Detected (usually refers to VOC and/SVOC TICs). NDP No Determination Possible SS Calibrated against a single substance SV Surrogate recovery outside performance criteria. This may be due to a matrix effect. W Results expressed on as received basis. + AQC failure, accreditation has been removed from this result, if appropriate, see 'Note' on previous page. Results above calibration range, the result should be considered the minimum value. The actual result could be significantly >> higher, this result is not accredited. * Analysis subcontracted to an Element Materials Technology approved laboratory. AD Samples are dried at 35°C ±5°C CO Suspected carry over LOD/LOR Limit of Detection (Limit of Reporting) in line with ISO 17025 and MCERTS ME Matrix Effect NFD No Fibres Detected BS AQC Sample LB Blank Sample N Client Sample TB Trip Blank Sample OC Outside Calibration Range AA x2 Dilution AB x5 Dilution Please include all sections of this report if it is reproduced QF-PM 3.1.9 v34 All solid results are expressed on a dry weight basis unless stated otherwise. 17 of 19 Element Materials Technology Method Code Appendix EMT Job No: 22/556 ISO Analysis done Prep Method MCERTS Reported on 17025 on As Received Test Method No. Description No. (if Description (UK soils dry weight (UKAS/S (AR) or Dried appropriate) only) basis ANAS) (AD) Modified USEPA 8260. Quantitative Determination of Volatile Organic Compounds by Modified US EPA method 5021. Preparation of solid and liquid samples for GC SA_TM15 SA_PM10 Headspace GC-MS. headspace analysis. Modified USEPA 8260. Quantitative Determination of Volatile Organic Compounds by Modified US EPA method 5021. Preparation of solid and liquid samples for GC SA_TM15 SA_PM10 Yes Headspace GC-MS. headspace analysis. Modified USEPA 8270. Quantitative determination of Semi-Volatile Organic compounds SA_TM16 SA_PM30 Water samples are extracted with solvent using a magnetic stirrer to create a vortex. (SVOCs) by GC-MS. Modified USEPA 8270. Quantitative determination of Semi-Volatile Organic compounds SA_TM16 SA_PM30 Water samples are extracted with solvent using a magnetic stirrer to create a vortex. Yes (SVOCs) by GC-MS. Modified US EPA method 8270. Determination of specific Polychlorinated Biphenyl SA_TM17 SA_PM30 Water samples are extracted with solvent using a magnetic stirrer to create a vortex. congeners by GC-MS. SA_TM19 Determination of pH by bench pH meter SA_PM0 No preparation is required. Yes SA_TM191 Orthophosphate as PO4 by Colorimetric Measurement v1 SA_PM31 Sample is filtered SA_TM20 Modified BS 1377-3: 1990 Gravimetric determination of Total Dissolved Solids SA_PM31 Sample is filtered Yes SA_TM27 Major ions by Ion Chromatography SA_PM0 No preparation is required. Yes SA_TM28 Determination of Electrical Conductivity with hand held manual conductivity probe. SA_PM0 No preparation is required. Yes QF-PM 3.1.10 v14 Please include all sections of this report if it is reproduced 18 of 19 Element Materials Technology Method Code Appendix EMT Job No: 22/556 ISO Analysis done Prep Method MCERTS Reported on 17025 on As Received Test Method No. Description No. (if Description (UK soils dry weight (UKAS/S (AR) or Dried appropriate) only) basis ANAS) (AD) Determination of Alkalinity by titration of the sample with a standard solution of acid by SA_TM32 SA_PM0 No preparation is required. Yes visual detection of end points. Modified US EPA method 8015B. Determination of Gasoline Range Organics (GRO) in Modified US EPA method 5021. Preparation of solid and liquid samples for GC SA_TM36 SA_PM12 the carbon chain range of C4-12, MTBE and BTEX by headspace GC-FID. headspace analysis. Modified USEPA 8015B method for the determination of solvent Extractable Petroleum Fractionation into aliphatic and aromatic fractions using a Rapid Trace SPE/Water SA_TM5 SA_PM16/PM30 Hydrocarbons (EPH) with carbon banding within the range C8-C40 GC-FID. samples are extracted with solvent using a magnetic stirrer to create a vortex. TM005: Modified USEPA 8015B. Determination of solvent Extractable Petroleum Hydrocarbons (EPH) including column fractionation in the carbon range of C10-35 into aliphatic and aromatic fractions by GC-FID. TM036: Modified USEPA 8015B. SA_TM5/TM36 SA_PM12/PM16/PM30 please refer to SA_PM16/PM30 and SA_PM12 for method details Determination of Gasoline Range Organics (GRO) in the carbon chain range of C5-10 by headspace GC-FID. Including determination of BTEX and calculation of Aliphatic fractions. Determination of Trace Metal elements by ICP-MS (Inductively Coupled Plasma - Mass Analysis of waters and leachates for metals by ICP OES/ICP MS. Samples are filtered for UK_TM170 UK_PM14 Spectrometry) modified USEPA 200.8/6020A and BS EN ISO 17294-2 2016 dissolved metals and acidified if required. Determination of Trace Metal elements by ICP-OES (Inductively Coupled Plasma - Analysis of waters and leachates for metals by ICP OES/ICP MS. Samples are filtered for UK_TM30 Optical Emission Spectrometry). Modified US EPA Method 200.7, 6010B and BS EN ISO UK_PM14 dissolved metals and acidified if required. 11885 2009 Soluble Ion analysis using the Thermo Aquakem Photometric Automatic Analyser. UK_TM38 UK_PM0 No preparation is required. Modified US EPA methods 325.2, 375.4, 365.2, 353.1, 354.1 Modified USEPA 9060. Determination of TOC by calculation from Total Carbon and UK_TM60 Inorganic Carbon using a TOC analyser, the carbon in the sample is converted to CO2 UK_PM0 No preparation is required. and then passed through a non-dispersive infrared gas analyser (NDIR). QF-PM 3.1.10 v14 Please include all sections of this report if it is reproduced 19 of 19 KPS Shutdown & Dismantling Draft ESIA Report APPENDIX F GROUNDWATER LABORATORY RESULTS REVIEW August 2022 Appendices 63 Wessel Road, Rivonia, 2128 PO Box 2597, Rivonia, 2128 South Africa Tel: +27 (0) 11 803 5726 Fax: +27 (0) 11 803 5745 Web: www.gcs-sa.biz Eskom Komati Power Station – Groundwater Laboratory Results Review Report_Draft Version – 1 26 August 2022 Client: NEMAI CONSULTING Project Number: 22-0669 NEMAI CONSULTING KOMATI ESA Eskom Komati Power Station – Groundwater Laboratory Results Review DOCUMENT ISSUE STATUS Report Issue Draft – Version 1 Reference Number 22-0669 Title Eskom Komati Power Station – Groundwater Laboratory Results Review Name Signature Date Author Magiel Lourens 26 August 2022 Document Reviewer Johan Kriek 26 August 2022 LEGAL NOTICE This report or any proportion thereof and any associated documentation remain the property of RSK GCS until the mandator effects payment of all fees and disbursements due to RSK GCS in terms of the RSK GCS Conditions of Contract and Project Acceptance Form. Notwithstanding the aforesaid, any reproduction, duplication, copying, adaptation, editing, change, disclosure, publication, distribution, incorporation, modification, lending, transfer, sending, delivering, serving or broadcasting must be authorised in writing by RSK GCS. 22-0669 26 August 2022 Page ii NEMAI CONSULTING KOMATI ESA CONTENTS PAGE 1 INTRODUCTION .......................................................................................................................... 1 2 GROUNDWATER MONITORING WELL LOCATIONS ...................................................................... 3 3 GROUNDWATER LABORATORY RESULTS .................................................................................... 5 3.1 GROUNDWATER LABORATORY RESULTS .............................................................................................. 9 3.1.1 Exceedance’s overview ..................................................................................................... 9 3.1.2 WUL Exceedances ............................................................................................................. 9 3.1.3 SANS Exceedances .......................................................................................................... 10 3.1.4 SAWQG Aquatic TWQR Exceedances .............................................................................. 10 3.1.5 Summary/ High Risk Areas.............................................................................................. 11 4 DATA GAPS ............................................................................................................................... 12 LIST OF TABLES Table 2-1: Groundwater monitoring well locations ................................................. 3 Table 3-1: WSP Groundwater Monitoring Results .................................................... 6 Table 3-2: Aquatico Groundwater Monitoring Results .............................................. 7 Table 3-3: Aquatico Groundwater Monitoring Results (Continued) ............................... 8 LIST OF APPENDICES APPENDIX A: EXCEEDANCES ............................................................................................................. 15 22-0669 26 August 2022 Page iii NEMAI CONSULTING KOMATI ESA 1 INTRODUCTION RSK GCS Environment (PTY) LTD was appointed by NEMAI Consulting to undertake a review of the available groundwater laboratory results obtained from: • WSP (Report no: 41103965) which included groundwater monitoring results of 10 newly installed WSP groundwater monitoring wells (BH01-BH10). These wells were installed during June 2022 and subsequently sampled and analysed for the following parameters: o Characteristics such as total dissolved solids, pH, Total Organic Carbon etc. o Major anions & cations, trace metals. o Total Petroleum Hydrocarbons (TPH) Aliphatic C7 – C46; o Volatile Organic Compounds (VOCs) o Semi-Volatile Organic Compounds (SVOCs) ▪ Phenols ▪ Polycyclic Aromatic Hydrocarbons (PAHs) ▪ Phthalates ▪ Polychlorinated biphenyls (PCBs). • Aquatico (Laboratory Report no: 133002) which included groundwater monitoring results of 24 Eskom groundwater monitoring wells (Ab#, CB#, PB#, MW6 and KMR07). These wells were sampled during August 2022 and analysed for the following parameters: o Metals o BTEX & TPH Aliphatic C7 – C46 o PCBs (lab results not received) As part of the current review, the available groundwater monitoring chemistry data was summarised and screening against the following adopted screening criteria: • Eskom Water Use Licences (WUL) number 04/B11B/BCGI/1970 groundwater quality reserve limits. • South African National Standard (SANS) for Drinking Water, SANS241-1:2015. • South African Water Quality Guidelines (SAWQG) Volume 1, Domestic Use, Second Edition, 1996. • SAWQG Volume 7, Aquatic Ecosystems, Second Edition, 1996 The aim of the review was to highlight (a) contaminants of potential concern, (b) groundwater monitoring locations which exceeded the adopted screening criteria; and (c) identify areas where groundwater quality data gaps exist with regards to the existing groundwater monitoring well network and groundwater chemistry data received for review. 22-0669 26 August 2022 Page 1 NEMAI CONSULTING KOMATI ESA The review was undertaken on laboratory data as received and RSK GCS can make no comment on the validity, representativeness, and accuracy of the results as RSK GCS did not collect the samples. Background Eskom Holdings SOC (Ltd) is a South African utility that generates, transmits and distributes electricity. Eskom supplies about 95% of the country's electricity. Eskom’s 2035 strategy encompasses the journey that Eskom intends to take in response to the changing energy environment and the impact this has towards a sustainable power utility. This strategy is necessitated by the challenges that Eskom faces as a business as well as the global and local shifts occurring in the energy sector particularly with respect to environmental and climate change challenges, difficulties in accessing financing and changes to the macro industry environment significantly altering the energy supply industry (ESI). The road to 2035, includes the shutting down of a number of coal-fired power stations by 2035, repurposing and repowering, delivering new clean generation projects, expanding the Transmission grid, and rolling out micro grid solutions. Several power stations are reaching the end of life. These stations will go into extended cold reserve and are most likely to be fully decommissioned in the future. Eskom is considering a shutdown, dismantling and repurposing of some of its fleet as it reaches its end of life. Komati Power Station, situated in Mpumalanga will reach its end-of-life expectancy in September 2022. Eskom has not yet made a final decision on the decommissioning and repurposing plan. The decommissioning strategy could include complete demolition, selective dismantling and demolition or stripping parts of the plant for various reasons/uses, but each strategy will have its specific impacts, and will have a different roll-out plan. Whatever the decided decommissioning strategy, the objective would be to consider both environment and social aspects. 22-0669 26 August 2022 Page 2 NEMAI CONSULTING KOMATI ESA 2 GROUNDWATER MONITORING WELL LOCATIONS During the June and August 2022 respective groundwater monitoring by WSP and Aquatico, a total of 34 groundwater monitoring wells were sampled. These wells include 10 newly installed WSP groundwater monitoring wells and 24 existing Eskom groundwater monitoring wells which were sampled by Aquatico. The location of the groundwater monitoring boreholes in respect to the Komati repurposing development are indicated in Table 2-1 and graphically presented in Figure 4-1. Table 2-1: Groundwater monitoring well locations Komati PV_A Komati PV_B BESS_A WSP: BH9, BH10 WSP: BH6, BH7, BH8 WSP: None Aquatico: AB63 Aquatico: None Aquatico: None BESS_B BESS_C BESS_D WSP: BH4 WSP: BH3 WSP: BH2 Aquatico: None Aquatico: None Aquatico: None Greater Komati Area WSP: BH1 – Located north of BESS_D and down-gradient of the Power Station BH5 – Located north and down-gradient of the ash dam Aquatico: AB04 – Located to the south-east and up-gradient BESS_B and down-gradient of the ash dam AB06 – Located to the north and down-gradient of the ash dam AB07 – Located to the east of BESS_C and down-gradient of the ash dam AB08 – Could not locate on available maps AB51 – Could not locate on available maps AB52 – Could not locate on available maps AB53 – Located to the south of BESS_B and down-gradient of the ash dam, and upgradient of the Komati Town (residential). AB54 – Located to the south of BESS_B and down-gradient of the ash dam, and upgradient of the Komati Town (residential). 22-0669 26 August 2022 Page 3 NEMAI CONSULTING KOMATI ESA AB55 – Located north and down-gradient of the ash dam AB56 – Located north and down-gradient of the ash dam AB57 – Located to the south of BESS_B and down-gradient of the ash dam, and upgradient of the Komati Town (residential). AB58 – Located to the south and up-gradient of the ash dam AB59 – Located to the south and up-gradient of the ash dam AB61 – Located to the east and cross-gradient of the ash dam AB62 – Located to the east and cross-gradient of the ash dam CB08 – Could not locate on available maps CB52 – Located to the north-west and down-gradient of the Power Station CB60 – Could not locate on available maps CB64 New BH – Could not locate on available maps PB47 – Could not locate on available maps PB48 – Located to the north and down-gradient of the Municipality sewerage works KMR07 – Located to the north and down-gradient of the Municipality sewerage works MW6 – Could not locate on available maps 22-0669 26 August 2022 Page 4 NEMAI CONSULTING KOMATI ESA 3 GROUNDWATER LABORATORY RESULTS The groundwater laboratory results received from NEMAI Consulting for samples collected by WSP and Aquatico are presented in Table 3-1 and Table 3-2, Table 3-3, respectively. The results have been screened against the following adopted screening criteria: • WUL groundwater quality reserve limits. • SANS for Drinking Water, SANS241-1:2015. • SAWQG Volume 1, Domestic Use, Second Edition, 1996. • SAWQG Volume 7, Aquatic Ecosystems, Second Edition, 1996 The groundwater samples collected by WSP and Aquatico were analysed for metals, inorganics, VOCs, SVOCs and TPHs. Only compounds that were detected in the collected groundwater samples (i.e above laboratory detection limit) are listed in Table 3-1, Table 3-2 and Table 3-3. The wells which exceeded the adopted screening criteria are presented graphically in Figure 4-2. See Appendix A for a full list of groundwater monitoring well exceedances in relation to the adopted screening criteria. 22-0669 26 August 2022 Page 5 NEMAI CONSULTING KOMATI ESA Table 3-1: WSP Groundwater Monitoring Results 22-0669 26 August 2022 Page 6 NEMAI CONSULTING KOMATI ESA Table 3-2: Aquatico Groundwater Monitoring Results 22-0669 26 August 2022 Page 7 NEMAI CONSULTING KOMATI ESA Table 3-3: Aquatico Groundwater Monitoring Results (Continued) 22-0669 26 August 2022 Page 8 NEMAI CONSULTING KOMATI ESA 3.1 Groundwater laboratory results 3.1.1 Exceedance’s overview From the groundwater laboratory results it can be noted that most of the groundwater samples collected from the WSP wells contained multiple compounds exceeding the adopted WUL, SANS and SAWQG Aquatic TWQR, whereas the groundwater samples collected by Aquatico from the Eskom monitoring wells only exceeded some of the adopted screening criteria. It should be noted that most of the Aquatico sampled groundwater monitoring wells were only analyzed for a limited number of compounds whereas the WSP wells were analysed for an extensive suite, including inorganics. Inorganic results for only two Aquatico sampled wells were forwarded to RSK GCS namely MW6 and KMR07. This is a significant data gap in the evaluation of the groundwater results. 3.1.2 WUL Exceedances Of the sampled wells, the wells which contained the most compounds exceeding the WUL limits include BH3 (9 exceedances), KMR07 (7 exceedances), BH1 and BH8 (5 exceedances), BH5 (4 exceedances). BH3 is located within BESS_C (currently scrap yard) and contained elevated sulphate, magnesium, sodium, and manganese concentrations. KMR07 is located to the north-west of the municipal sewerage works and indicated multiple exceedances but none which were significantly elevated above the WUL limits. BH1 is located to north and down-gradient of BESS_D (currently coal stockyard) and Lake Finn and near the Gelukspruit stream, this well contained highly elevated dissolved manganese, ammonia, and Total Alkalinity. BH8, is located near the southern border of the PV_A border close to the rehabilitated domestic waste site and historical ash dam footprint. BH8 also contained multiple compounds exceeding the WUL limits. Monitoring well BH5 is located to the north- east and down-gradient of the old ash dams and to the north and down-gradient of the raw water dams, and like KMR07 and BH8, monitoring well BH5 reported multiple WUL exceedances but none that were significantly elevated above the WUL limits. Manganese As mentioned above, multiple groundwater monitoring wells contained various compounds exceeding the WUL reserve limits. It is worth mentioning that most of the sampled wells contained dissolved manganese concentrations marginally exceeding the WUL reserve limit. 22-0669 26 August 2022 Page 9 NEMAI CONSULTING KOMATI ESA The wells which contained the highest dissolved manganese concentrations include BH1-BH3, AB07 and AB52. These wells all marginally exceeded the WUL manganese reserve limit and are located to the north and down-gradient of the ash dam, and near the Power Station. Monitoring well AB07 contained the highest manganese concentration followed by BH1. Monitoring well AB07 is located to the east and cross-gradient of the Power Station scrap yard and in close proximity to the Gelukspruit stream. BH1 is located north and down-gradient of BESS_D (currently coal stockyard) and Lake Finn and is also located near the Gelukspruit stream. Total petroleum hydrocarbons Of the 34 groundwater monitoring wells sampled all were analysed for total petroleum hydrocarbon concentrations and only two wells contained detectable TPH concentrations namely AB07 and CB64 New. Of the two wells only the TPH concentrations detected at CB64 New exceeded the WUL reserve limits. The location of this well is however not known. Multiple sampled wells also contained elevated ammonia and chloride concentrations compared to the WUL limits. 3.1.3 SANS Exceedances Of the 34 sampled groundwater monitoring wells, 13 of the wells contained compounds exceeding the SANS241 drinking water standards. Of these 13 wells, the dissolved lead and manganese were the two most prevalent compounds exceeding the SANS screening values. Groundwater monitoring wells BH6, BH7 and BH8 contained the most elevated lead concentrations and are all located near the borders of the PV_A parcel of land. According to the WSP report (Report ref: 41103965) The PV_A parcel of land has mostly been used as farmland, with historical ash/slimes dam located near the east of the of the parcel and rehabilitated domestic waste site near the south-eastern border of the parcel. Once more, groundwater monitoring well BH3 was the most impacted with 4 SANS exceedances reported, followed by BH1 and BH6 with 2 exceedances. BH1 is located to the north of BESS_D (currently coals stock yard); and BH6 is located near the northern border of the PV_A parcel of land, to the west and cross-gradient of the ash dams. 3.1.4 SAWQG Aquatic TWQR Exceedances 19 of the 34 samples groundwater monitoring wells exceeded the SAWQG Aquatic Target Water Quality Ranges. The aquatic target quality ranges are more conservative compared to the SANS drinking water and WUL values. Of the compounds analysed manganese and zinc followed closely by lead were the three most predominant compounds detected which exceeded the adopted aquatic screening values. The two highest dissolved zinc concentrations were detected at BH8 and BH6. As mentioned previously, both wells are 22-0669 26 August 2022 Page 10 NEMAI CONSULTING KOMATI ESA located on the planned PV_A parcel. BH5 also contained an elevated zinc concentration with respect to the aquatic screening value and is located to the north-east and down-gradient of the ash dam and raw water dams. Of the sampled wells, the well which contained the most compounds exceeding aquatic screening criteria was BH2 (5 exceedances), followed by BH1, BH3, BH5 and BH6 (4 exceedances each). 3.1.5 Summary/ High Risk Areas Based on the received groundwater monitoring laboratory results, most of the sampled wells exceeded the adopted screening criteria, however, the most highly impacted locations include the areas in the vicinity of: • BH3 & AB07 – Power Station Scrapyard • BH2 – Power Station Coal Stock Yard • BH1 – Area north of Lake Finn • KMR07 – Area north of the municipal sewerage works • BH5 – Area north of the ash dams • BH8 – Area near the south-east border of PV_A • BH6 – Area near the northern border of PV_A It should be noted that there would most probably be additional highly impacted areas which aren’t currently highlighted due to the lack of inorganic data for the Aquatico sampled wells. 22-0669 26 August 2022 Page 11 NEMAI CONSULTING KOMATI ESA 4 DATA GAPS Based on the review of the groundwater monitoring results made available to RSK GCS for review, the following data gaps currently exist: 1. The locality of multiple sampled Aquatico wells are not known. 2. The two data sets from WSP and Aquatico are not directly comparable as the WSP dataset contains a wider range of analytes and which are not reported under the Aquatico dataset. 3. The review was undertaken on data as received and the sampling methodologies, sample preservation, quality assurance and quality control measures employed by the two respective companies while sampling are not known. 4. Except for the 24 existing Eskom wells sampled by Aquatico, there are multiple additional groundwater monitoring wells which were not sampled and did not form part of the current review. 5. A discrepancy between the detection limits and compounds detected by the Aquatico and WSP datasets have been identified. For example, iron was detected in all WSP sample results whereas only three of the Aquatico sampled contained detectable iron concentrations. 6. There is currently a lack of groundwater monitoring data inside the Komati Power Station at the following areas: a. BESS_A b. Generator area c. Garage area d. Hazardous waste storage area e. Fuel storage area f. Cooling towers 22-0669 26 August 2022 Page 12 FIGURE 4-1: SITE LAYOUT MAP Legend: Newly Installed Monitoirng Wells (Sampled) Exis ng Monitoirng Wells (Sampled) Exis ng Monitoring Wells (Not Sampled) PV Installa on Site A PV Installa on Site B Parent Farm Boundary 20m Contours BESS Development Sites Municipal Sewege Works Perennial Rivers Non-perennial Rivers Data Sources: Esri World Imagery Basemap with additional data provided by specialist FIGURE NO.: - M AP NO.: 22-0669-01 DRAWN BY: RUDOLF VAN HEERDEN REVIEWED BY: M AGIEL LOUERENS (CONSULTANT) (PROJECT M ANAGER) DATUM : WGS 84 DATE: 25/08/2022 PROJECTION: GEOGRAPHIC PROJECT: KOM ATI SHUTDOWN SOIL & GROUNDWATER ESA CLIENT: NEM AI 63 Wessel Road Woodmead PO Box 2597 Rivonia 2128 South Africa N Tel: +27 (0) 11 803 5726 Fax: +27 (0) 11 803 5745 E-mail: jhb@gcs-sa.biz www.gcs-sa.biz FIGURE 4-2: GROUNDWATER EXCEEDANCES MAP Legend: Newly Installed Monitoirng Wells (Sampled) Exis ng Monitoirng Wells (Sampled) Exis ng Monitoring Wells (Not Sampled) PV Installa on Site A PV Installa on Site B Parent Farm Boundary 20m Contours BESS Development Sites Municipal Sewege Works Perennial Rivers Non-perennial Rivers Data Sources: Esri World Imagery Basemap with additional data provided by specialist FIGURE NO.: - M AP NO.: 22-0669-01 DRAWN BY: RUDOLF VAN HEERDEN REVIEWED BY: M AGIEL LOUERENS (CONSULTANT) (PROJECT M ANAGER) DATUM : WGS 84 DATE: 25/08/2022 PROJECTION: GEOGRAPHIC PROJECT: KOM ATI SHUTDOWN SOIL & GROUNDWATER ESA CLIENT: NEM AI 63 Wessel Road Woodmead PO Box 2597 Rivonia 2128 South Africa N Tel: +27 (0) 11 803 5726 Fax: +27 (0) 11 803 5745 E-mail: jhb@gcs-sa.biz www.gcs-sa.biz NEMAI CONSULTING KOMATI ESA APPENDIX A: EXCEEDANCES 22-0669 26 August 2022 Page 15 WUL EXCEEDANCES SANS EXCEEDANCES SAWQG EXCEEDANCES