Peter Quinn Managing Director

1. Peter Quinn Managing Director

2. Recent Awards • Environment Award, Utility Industry Achievement Awards, Dec 2003 • Short-listed for National Business Awards, Environment Category, 2004 • Special commendation in National Business Awards Innovation category, 2004 • VIBES (Vision in Business for the Environment of Scotland) Award, Dec 2004 • Investors in People accreditation, Feb 2004 • Queen’s Award for Enterprise, Innovation category, 2005

3. Joint Venture between ScottishPower and Lafarge Cement UK Recycle and re-engineer power station ash to make quality construction products We employ 23 people Completed £8m strategic investment in 2003 Ash volumes sold almost doubled and record profit achieved in 2003/4 Introducing ScotAsh

4. ScotAsh Facilities • £7.9 Million Project • 10,000 tonnes of Primary Storage • 40 t/hr Classifier with 20t/hr Backup Classifier • 100 t/hr Blending Facility • Packing for 25kg Bags and 1.5 tonne IBC’s • Ash Beneficiation • Rail Loading Facility

5. Longannet and Cockenzie Power Stations produce 600,000 to 800,000 tonnes of ash per annum Until recently majority of this was disposed of to ash lagoons, creating new land Majority now sold by ScotAsh for construction projects or recycled in added-value, own-brand products Ash Facts & Figures

6. A Bit of History • Properties of ash discovered by the Romans • Used in the construction of the Pantheon in Rome, 27 B.C. and 1 A.D.

7. Properties of PFA

8. Hydration of PFA PFA reacts with the lime produced by the hydration of cement to give more hydration products - reducing the voids and lowering the permeability.

9. Kirkwall Harbour7,000 tonnes of Trojan

10. Amerada Hess Oil Platform

11. Cenospheres and Their Uses

12. ScotAsh Plant

13. Ash Beneficiation Critical • Need to guarantee ash quality and availability for cementitious markets which means <7% LOI • Ash LOI from the station can vary considerably from 5% to >20%! • Silo storage to capture low LOI ash not sufficient to guarantee a service throughout the year • Need to be Independent of the Station • Legislation leading to low NOX burners will tend to increase LOI’s in Ash in future

14. PFA Beneficiation

15. STI

17. Full Process Flows • Lagoon • Grouts • Fill • FBA • Cenospheres Station • Part 2 sales • CP customers • Cement plants • Con Ash • Grouts • Fill Run of Station Ash ScotAsh Beneficiation “Unburnt Coal!! Fuel Longannet Other Active carbon filter? Blend with sewage sludge? Brick works Coarse Ash Classifier EN 450/ Dunbar mac Part 1 • Non Cementitious • Grouts • Stabilisation Cementitious Blending Plant

18. Pfa as a fill material ... • Used as a load bearing fill or for landscaping. • Lightweight - reduces the load on weak ground. • Self hardening - offers considerable advantages over natural clays and granular materials. • Low permeability - sheds rain water naturally which reduces leaching. • Can be mixed with lime - gives higher strengths because of the pozzolanic reaction. • Suitable for use as a road sub base which can be trafficked straight away.

19. Kincardine By-pass

20. PFA for grouting ... • PFA when mixed with cement and/or lime is used for grouting fissures, voids and cavities: • in redundant mine workings, caverns, etc. • in redundant pipework systems, e.g. sewers. • for filling behind tunnel linings. • used in gunite applications.

21. Royal Scottish Academy

22. Using PFA & FBA in lightweight concrete blocks ... • Pfa used in two ways: • As a primary material in aerated concrete blocks • As a fine filler material in lightweight concrete blocks • FBA uses as a lightweight aggregate in lightweight blocks

23. PFA in concretes • PFA is a pozzolana • Pozzolanas were used by the Romans to build many buildings, for example the Pantheon. • This means it reacts with lime to form silicate hydrates - these hydrates give concrete strength and durability. • Classified PFA reduces the water content of a concrete - reducing permeability. • PFA improves the sulphate resistance and reduces the risk of alkali silica reaction • It reduces the heat of hydration compared to Portland Cement • PFA is supplied to BS3892 Part 1 and EN450

24. ScottishPower Windfarm

25. Kingairloch Hydro Scheme

26. Packaging Plant

27. R &D: New Uses for Ash • Sustainable roads project – with Heriot-Watt University& Edinburgh City Council • Envirocem – waste stabilisation • Stone Paving System – new Bedding Mortar Cement and Joint Filling Grout, with latex • Oil well linings for sector in Alaska and Latin America • Project with Strathclyde University on use of ash to bind harbour contaminants like tributyl tin

28. Environment Saved 1.5 million tonnes virgin aggregates

29. Environment Saved 100,000 tonnes of CO2 in three years

30. Environment Saved disposal of over one million tonnes of ash to land over three years

31. Partnerships for Sustainability • Industry, government and regulators partnerships critical for development of sustainable materials • Regulators must work with industry to address barriers to sustainable development • Legal interpretations of EU Directives is: – Costly for industry and the tax payer – Common sense and sustainability objectives suffer Dialogue and a joint approach to develop solutions is the best way forward