1. EnerTech Environmental, Inc. 2008. All rights reserved. SlurryCarb™ Process Will Energy Efficiently Convert Biosolids to a Renewable Fuel RAYMOND J. KEARNEY, P.E., BCEE Vice President EnerTech Environmental, Inc. BACWA Biosolids Workshop San Leandro, CA June 2, 2008

2. 2EnerTech Environmental, Inc. 2008. All rights reserved. Outline The SlurryCarb™ Process Simple Mass/Energy Balance Renewable Fuel Rialto Mass/Energy Balance Rialto Project Status Rialto Construction Photos

3. 3EnerTech Environmental, Inc. 2008. All rights reserved. The SlurryCarb™ Process biosolids are beneficially used as a renewable fuel

4. 4EnerTech Environmental, Inc. 2008. All rights reserved. Simple Mass/Energy Balance - Drying Drying consumes significantly more thermal energy than SlurryCarb™ 100 wet tons 80 H 2 O 20 Solids 80 H 2 O 20 Solids @ 1000 Btu/lb = 160,000,000 Btus Energy

5. 5EnerTech Environmental, Inc. 2008. All rights reserved. Simple Mass Balance - SlurryCarb™ 62 tons H 2 O (never evaporated) 100 wet tons 80 H 2 O 20 Solids 18 tons E-Fuel 2 tons CO 2 36 tons 18 tons H 2 0 18 tons solids 98 tons 80 tons H 2 O 18 tons solids 18 tons H 2 O (evaporated) Dryer Centrifuge

6. 6EnerTech Environmental, Inc. 2008. All rights reserved. Simple Energy Balance - SlurryCarb™ SlurryCarb™ Utilizes 60% less thermal energy than drying SlurryCarb @ 175 Btu/lb = 28,000,000 Btus Drying @1000 Btu/lb = 36,000,000 Btus 64,000,000 Btus (160-64)/160=60% Energy