Development of a Global Acid Rock Drainage Guide. Sudbury 2007

Transcription

1 Development of a Global Acid Rock Drainage Guide Denis Kemp Chair of INAP Operating Committee Presented at Sudbury 2007 Mining and the Environment International Conference October 19 th - 26 th 2007

2 Who and What is INAP? An organization of international mining companies formed in 1998; dedicated to reducing the liabilities and legacies associated with sulphide mine materials.

3 INAP s Mandate Under its charter membership open to any mining company Dedicated to technical development, Increased awareness of the ARD and ML liabilities in mining and processing To open sharing of information on a worldwide basis

4 The Organisation's Activities A virtual organisation with no office A part time Technical Manger A part time Administrator Sweat equity contributed by members Fund R & D projects mostly jointly Supports workshops and outreach Fund conferences on ARD and ML

5 Home to the ICARD Conferences

6 Some History Early identification of varying ARD practices around the world Identified the need for a consistent best practice manual in the management and treatment of ARD INAP was new - acceptance of the need within and outside the sector was questioned by many

7 Moving Forward Early progress slow INAP new and lacked credibility Success built slowly through projects, workshops and outreach Duplicate effort identified around the world Regional organisations great supporters of the need for consistency and sharing Lead to formation of the Global Alliance

8 Global Alliance Water Research Commission MEND

9 The Genesis of an ARD Guide GA meetings identified issues needing guidancecharacterisation, prediction, treatment, monitoring, etc Unique geographic and climatic issues Complete characterisation & appropriate predictions Avoid imposition of inappropriate tools by regulators Audience = companies, governments, consultants, researchers, educators, communities of interest, bankers Primary target = a scientist or engineer with background in chemistry, the basics of civil engineering but not specifically related to ARD

10 Scoping the Need Reactivated the idea of a best practice manual Develop a detailed plan for Board approval ready for tender Established a project Director for INAP Keith Ferguson Formed a Technical Steering Committee and a Management Committee

11 First Steps INAP Members, GA Members & Experts provided input & special needs Defined the scope what is in or out Prepared an outline Table of Contents Established a budget Identified Consultants with International Breadth to execute the contract Called the document: GARD Guide

12 Selection of Consultant A standard process RFPs, evaluation and selection In the Jeopardy game Question: They are the GARD Guide Contractor? Answer: Who is N. America and S. Africa offices as lead - use their worldwide resources Chapter Champions (in house and consulting experts)

13 Scope Flexible - encompass site-specific issues Avoid duplication - build on existing guidelines and compendiums (not reinvent!) Promote a consistent systematic approach (no short cuts) Founded on a risk based approach Endorse reduction and control at the source A how to guide not regulatory or design driven Have a global focus to the problem Be based on proven, field tested technologies Cater to the life cycles of a mine

14 Example of GARD Guide Contents The ARD Process Corporate, Regulatory and Community Framework Characterization Prediction Prevention and Control (Mitigation) Drainage Treatment Monitoring Management and Performance Assessment ARD Management and Sustainability Framework Appendices & references

15 Definitions, Nomenclature and Accessibility Types of Drainage Produced by Sulphide Mineral Oxidation Typical relation to drainage ph: Saline Drainage Acid Rock Drainage Neutral Mine Drainage ph Typical drainage characteristics: Acid Rock Drainage: acidic ph moderate to elevated heavy metals elevated sulphate Neutral Mine Drainage: near neutral to alkaline ph low to moderate heavy metals. May have elevated zinc and cadmium. low to moderate sulphate Saline Drainage: neutral to alkaline ph low heavy metals. May have moderate iron. moderate sulphate and calcium

16 Example Web Page

17 The Product GARD Guide will be web accessible Assembled on a Wiki basis Golder Associates will develop a Beta version (approximately 75-80% complete) World Bank, ICMM, MAC and others very supportive Beta version review by other stakeholders Guide will be best practice upon completion A living document

18 Progress & Planned Schedule Chapter Champions identified Final Table of Contents near completion Beta version available 2 nd Qtr 2008 Consultation with other parties commences 3 rd Qtr 2008 Completion 1 st & 2 nd Qtr 2009 Publication June 2009 at 8 th ICARD

19 Water Research Commission MEND GARD Guide INAP: ICARD 8: INAP Technical Manager: THANK YOU