Comment on Filing of CAlifornians for Renewable Energy, Inc. under CP04-58.

BILL POWERS, P.E. PROFESSIONAL HISTORY Powers Engineering, San Diego, CA 1994- ENSR Consulting and Engineering, Camarillo, CA 1989-93 Naval Energy and Environmental Support Activity, Port Hueneme, CA 1982-87 U.S. Environmental Protection Agency, Research Triangle Park, NC 1980-81 EDUCATION Master of Public Health Environmental Sciences, University of North Carolina Bachelor of Science Mechanical Engineering, Duke University PROFESSIONAL AFFILIATIONS Registered Professional Mechanical Engineer, California (Certificate M24518) American Society of Mechanical Engineers International Gas Turbine Institute San Diego County Air Pollution Control District Hearing Board TECHNICAL SPECIALTIES Twenty-two years of experience in: Power plant air emission control/water conservation assessments Combustion equipment permitting, testing and monitoring Air pollution control equipment retrofit design/performance testing Air emissions testing/criteria and hazardous air pollutants Petroleum refinery emission inventory development Oil and gas production emission inventory development Latin America environmental project experience POWER PLANT AIR EMISSION CONTROL/WATER CONSERVATION ASSESSMENTS Utility Boiler Assessment of Air Cooling and Integrated Gasification/Combined Cycle for Proposed 500 MW Coal-Fired Plant. Provided expert testimony on the performance of air-cooling and IGCC relative to the conventional closed-cycle wet cooled, supercritical pulverized coal boiler proposed by the applicant. Steam Pro coal-fired power plant design software was used to model the proposed plant and evaluate the impacts on performance of air cooling and plume-abated wet cooling. Results indicated that a conservatively designed air- cooled condenser could maintain rated power output at the design ambient temperature of 90 oF. The IGCC comparative analysis indicated that unit reliability comparable to a conventional pulverized coal unit could be achieved by including a spare gasifier in the IGCC design, and that the slightly higher capital cost of IGCC was offset by greater thermal efficiency and reduced water demand and air emissions. Utility Boiler Assessment of Closed-Cycle Cooling Retrofit Cost for 1,200 MW Coal-Fired Plant. Prepared an assessment of the cost and feasibility of a closed-cycle wet tower retrofit for the 1,200 MW Roseton Generating Station. Determined that the cost to retrofit the Roseton plant with plume-abated closed- cycle wet cooling was well established based on cooling tower retrofit studies performed by the original owner (Central Hudson Gas & Electric Corp.) and subsequent regulatory agency critique of the cost estimate. Also etermined that elimination of redundant and/or excessive budgetary line items in owners cost estimate brings the closed-cycle retrofit in line with expected costs for comparable new or retrofit plume-abated cooling tower applications. Powers Engineering 1 of 14 Utility Boilers Evaluation of ...