“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Demonstration of Amended Silicates™ for Mercury Control at Miami Fort Unit 6 Project Summary Spring, 2004 Jim Butz, Principal Investigator Amended Silicates, LLC

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Features of Sorbents for Mercury Control  Low capital cost  Easy to retrofit  Control is simple  Minimal impact on plant operation  Hg removal rate controlled by sorbent injection ratio  Applicable to all coals, some more difficult (PRB, lignite)  Ongoing need for sorbent  Sorbent collected with fly ash  Two types of sorbent for mercury control – activated carbon and Amended Silicates™

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Amended Silicates™ Advance Sorbent Solution  Amended Silicates™ are inexpensive, non-carbon substrates amended with mercury-binding sites  Silicate-based substrate, chemically similar to the native fly ash – no impact on sale of fly ash  Sites react with elemental and oxidized mercury species to bind the mercury to the sorbent  ADA initial development effort funded by DOE, EPA, CH2M Hill  Patent pending

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Amended Silicates™ Mercury Control Pilot Plant Results Note: Concentration units [µg/Nm 3 ] 96.7%90.0%70.5% % Removal Post-Baghouse Hg Pre-Baghouse Hg Baseline Vapor Total Hg baseline Sorbent Injection Rate (lb/MMACF) © 2003, all rights reserved

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Amended Silicates™, LLC  Joint Venture – ADA Technologies - technology developer – CH2M Hill - utility market presence and scale-up to commercial production – Amended Silicates, LLC was formed in April 2003  Objective – Provide advance sorbent technology as a low-cost capital and O&M solution to meet utility customers’ need to control flue- gas mercury  Current Status – Amended Silicates, LLC will develop, manufacture, market, and sell advanced sorbent on a commercial scale in the ~2007 timeframe.

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Project Objective  Primary: Demonstrate ability of Amended Silicates sorbent to remove mercury from flue gas in a commercial-scale installation. Conduct a 30-day continuous trial to show compatibility with plant equipment.  Secondary: Deliver commercial quantities of Amended Silicates sorbent for use in the demonstration.

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Project Team  Amended Silicates, LLC: prime contractor and administrator of first- and second- tier subcontracts  ADA Technologies, Inc.: sorbent developer and lead organization for field operations  CH2M Hill: lead organization for sorbent preparation and site engineering  Cinergy Power Generation Services, LLC: Provider of host site and cost-share partner

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Host Site Description  Cinergy Miami Fort station in North Bend, OH  Unit 6: 175 MW(e) capacity  Eastern bituminous coal (WV and KY sources)  Equipped with 3 ESPs in series (2 back-to- back, common box), each less than 200 SCA  Mercury measurements to be made after first ESP to be representative of small-ESP plant configuration

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Project Overview  Scheduled for completion in 16 months after contract signature  Scope: $1.76 million, including Amended Silicates sorbent costs of ~$600K  Phase I: Preparation  Phase II: Demonstration  Phase III: Analysis

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Phase I: Preparation  Project Planning – Detailed coordination with host site, project team  Site Preparation and Sorbent Acquisition – CFD modeling of injection to optimize layout  Injection System Installation and Checkout  Mercury Monitoring System Installation and Checkout (UNDEERC)

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Phase II: Demonstration  Baseline Mercury Removal Characterization  Activated Carbon Trial – Use as basis for comparison  Amended Silicates Trial – Control Level (parametric) Investigation – Extended Injection Evaluation  Ontario Hydro Sampling for comparison with CEMS data and QA/QC evaluation

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Phase III: Analysis  QA/QC Planning and Execution – UNDEERC as QA/QC lead  Analysis of Data from Demonstration Trials – Establish project data base – ID trends and significant parameters in sorbent performance  Reporting – Preparation of conference papers and project reports  Project Management – Establish project website for coordination among team members and means to share data – Manage overall project activities with respect to scope, schedule, and budget

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Mercury Measurement  UNDEERC mercury continuous emissions monitors  Western Kentucky University Ontario-Hydro sampling  Coal and Fly ash samples to be acquired on a routine basis for mercury analysis  Fly ash samples acquired for evaluation in concrete testing by Boral Materials Technologies

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Milestones  April project start  Fall start installation at site  Early deliver sorbents to site  First Quarter of 2005: start of injection at host site  Second Quarter 2005: finish testing, start analyses  Third Quarter 2005: Complete analyses, prepare final report  Fourth Quarter 2005: Continue planning for dedicated sorbent manufacturing facility; identify additional test opportunities

“Advanced sorbent solutions for the environment.” © 2003, all rights reserved Seeking Strategic Partners  Looking for utilities, others for technical and financial participation in project  Opportunity to monitor project on a first-hand basis  Review of data and input to test plans  Confidential insight into sorbent production and economics  Favored position in scheduling of further demonstrations