Eskom Ingula Pump Storage Scheme
Total Page:16
File Type:pdf, Size:1020Kb
ESKOM INGULA PUMP STORAGE SCHEME GEOHYDROLOGICAL IMPACT ASSESSMENT PROPOSED CEMETERY MAY 2010 FINAL REPORT for INGULA PUMPED STORAGE SHEME by GHT CONSULTING SCIENTISTS PROJECT TEAM L.J. van Niekerk M. Smit Project no.: 274-19-ghd.576 Start Date: February 2010 Current Phase: Final Report Start Date: February 2010 Report no.: RVN 576.1/1025 Report Date: May 2010 Geo-Hydro Technologies OFS (Pty)Ltd. Trading as GHT Consulting • Reg. no. 94/05593/07 • VAT no. 493 017 5890 PO Box 32998 Fichardt Park 9317 • http://www.ghtglobal.com • E-Mail: [email protected] Tel: +27 (0) 51 522 7185 • Fax: +27 (0) 51 522 4205 • Cell: +27 (0) 82 652 2992 +27 (0) 82 656 6996 10 May 2010 Our ref.: RVN 576.1/1025 Zi tholele Consulting (Pty) Ltd PO Box 6002 Hal fway House 1685 South Africa FO R ATTENTION: Mr. Konrad Kruger Dear Sir, GEOHYDROLOGICAL IMPACT ASSESSMENT PROPOSED CEMETERY AT ESKOM INGULA PUMPED STORAGE SCHEME MEI 2010 - FINAL REPORT It is our pleasure in enclosing one electronic copy and three hard copies of the report RVN 576.1/1025 “GEOHYDROLOGICAL IMPACT ASSESSMENT PROPOSED CEMETERY AT ESKOM INGULA PUMPED STORAGE SCHEME MEI 2010 - FINAL REPORT”. This is a final report and includes the field work and detailed description of the hydrological as well as geohydrological assessments on three candidate cemetery sites. All the issues that need immediate attention are also discussed in detail in this report. We trust that the report will fulfil the expectations of the Power Station and we will supply any additional information if needed. Yours sincerely, Louis J van Niekerk (Pr.Sci.Nat.) Cell: 082 6522992 E-mail: [email protected] Copies: 1) Three Printed copies and one electronic copy to Mr Konrad Kruger of Zitholele Consulting (Pty) Ltd Although Geo-Hydro Technologies (Pty) Ltd. exercises due care and diligence in rendering services and preparing documents, Geo-Hydro Technologies (Pty) Ltd. accepts no liability, and the client, by receiving this document, indemnifies Geo-Hydro Technologies (Pty) Ltd. and its directors, managers, agents and employees against all action, claims, demands, losses, liabilities, costs, damages and expenses arising from or in connection with services rendered, directly or indirectly by Geo-Hydro Technologies (Pty) Ltd. and by the use of the information contained in this document. ______________________________ This document contains confidential and proprietary information of Geo-Hydro Technologies (Pty) Ltd. and is protected by copyright in favour of Geo-Hydro Technologies (Pty) Ltd. and may not be reproduced, or used without the written consent of Geo-Hydro Technologies (Pty) Ltd., which has been obtained beforehand. This document is prepared exclusively for ESKOM Ingula Pumped Storage Scheme and is subjected to all confidentiality, copyright and trade secret rules, intellectual property law and practices of SOUTH AFRICA. Directors: L.J. van Niekerk Pr.Sci.Nat. [M.Sc.]; D.C. Rudolph Pr.Sci.Nat. [M.Sc] Head Office: Bloemfontein (Free State) Offices: Springs (Gauteng); Vryheid (KwaZulu-Natal); Middelburg (Eastern Cape); Hendrina (Mpumalanga); Kimberley (Northern Cape) - 1 - - TABLE OF CONTENTS - 1 INTRODUCTION ............................................................................................................................. 1 1.1 OBJECTIVES OF THE IMPACT ASSESSMENT ....................................................................................... 1 2 PHYSICAL GEOGRAPHY .............................................................................................................. 1 2.1 EXTENT OF INVESTIGATION ............................................................................................................. 1 2.2 TOPOGRAPHY AND SURFACE DRAINAGE .......................................................................................... 1 2.2.1 Candidate Site 1 ...................................................................................................................... 1 2.2.2 Candidate Site 2 ...................................................................................................................... 2 2.2.3 Candidate Site 6 ...................................................................................................................... 2 2.3 INFRASTRUCTURE AND MAN-MADE FEATURES ................................................................................ 2 2.4 CLIMATE AND VEGETATION............................................................................................................. 3 3 UNSATURATED ZONE SOIL CHARACTERISTICS ................................................................... 3 4 GEOLOGY ........................................................................................................................................ 5 5 GEOPHYSICAL INVESTIGATION................................................................................................ 6 5.1 APPROACH TO THE MAGNETIC SURVEY ........................................................................................... 6 5.2 DESCRIPTION OF THE MAGNETIC METHOD....................................................................................... 6 5.3 STUDY OF ORHTO-PHOTOGRAPHS .................................................................................................... 7 5.3.1 Candidate Site 1 ...................................................................................................................... 7 5.3.2 Candidate Site 2 ...................................................................................................................... 7 5.3.3 Candidate Site 6 ...................................................................................................................... 7 5.4 STUDY OF AIRBORNE MAGNETIC MAP ............................................................................................. 7 5.5 GROUND MAGNETIC SURVEY .......................................................................................................... 8 5.5.1 Candidate Site 1 ...................................................................................................................... 8 5.5.2 Candidate Site 2 ...................................................................................................................... 9 5.5.3 Candidate Site 6 .................................................................................................................... 10 5.6 RECOMMENDATIONS...................................................................................................................... 12 6 GEOHYDROLOGY ........................................................................................................................ 13 6.1.1 Hydrocensus Information and Field Observations ................................................................. 13 6.1.2 Groundwater Flow Direction ................................................................................................ 13 7 IMPACT ASSESSMENT ................................................................................................................ 13 7.1 POTENTIAL CONTAMINANT IMPACTS ............................................................................................. 13 7.2 ASSESSMENT OF FLAG CONDITIONS ............................................................................................... 14 7.3 ASSESSMENT OF AQUIFER VULNERABILITY ................................................................................... 18 8 CONCLUSIONS AND RECOMMENDATIONS ........................................................................... 19 9 REFERENCES ................................................................................................................................ 20 GHT Consulting Scientists Ingula Pumped Storage Scheme Proposed Cemetery – April 2010 RVN576.1/1025 - 2 - - TABLE OF FIGURES - FIGURE 1. MAGNETIC PROFILE ALONG TRAVERSE T09. 8 FIGURE 2. MAGNETIC PROFILE ALONG TRAVERSE T10. 9 FIGURE 3. MAGNETIC PROFILE ALONG TRAVERSE T11. 9 FIGURE 4. MAGNETIC PROFILE ALONG TRAVERSE T12. 9 FIGURE 5. MAGNETIC PROFILE ALONG TRAVERSE T06. 10 FIGURE 6. MAGNETIC PROFILE ALONG TRAVERSE T07. 10 FIGURE 7. MAGNETIC PROFILE ALONG TRAVERSE T08. 10 FIGURE 8. MAGNETIC PROFILE ALONG TRAVERSE T01. 11 FIGURE 9. MAGNETIC PROFILE ALONG TRAVERSE T02. 11 FIGURE 10. MAGNETIC PROFILE ALONG TRAVERSE T03. 12 FIGURE 11. MAGNETIC PROFILE ALONG TRAVERSE T04. 12 FIGURE 12. MAGNETIC PROFILE ALONG TRAVERSE T05. 12 - LIST OF TABLES - TABLE 1. LABORATORY PERMEABILITY TEST RESULTS OF SOIL SAMPLES. ........................................... 4 TABLE 2. FLAG CONDITIONS CRITERIA AND WEIGHTED FACTORS. ..................................................... 14 TABLE 3. FLAG CONDITIONS OF CANDIDATE CEMETERY SITE 1. ........................................................ 15 TABLE 4. FLAG CONDITIONS OF CANDIDATE CEMETERY SITE 2. ........................................................ 16 TABLE 5. FLAG CONDITIONS OF CANDIDATE CEMETERY SITE 6 ......................................................... 17 TABLE 6. VULNERABILITY OF GROUNDWATER AQUIFER DUE TO HYDROGEOLOGICAL CONDITIONS.. 19 - APPENDICES - APPENDIX A MAPS APPENDIX B LABORATORY PERMEABILITY TEST RESULTS OF SOIL SAMPLES GHT Consulting Scientists Ingula Pumped Storage Scheme Proposed Cemetery – April 2010 RVN576.1/1025 - 1 - 1 INTRODUCTION 1.1 Objectives of the Impact Assessment GHT Consulting was appointed by Zitholele Consulting (Pty) Ltd to perform geohydrological impact investigation on the local aquifer underlying proposed new cemetery sites for the relocation