ARCHIVED REPORTS LEC APPLICATION FOR CERTIFICATION

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APPENDIX 5.1C Evaluation of Best Available Control Technology The LEC project is required to use best available control technology on the combustion turbine/HRSG,the auxiliary boiler, and the cooling tower for various pollutants,in accordance with the requirements of the federal PSD and the District new source review programs. The applicability of BACT requirements under PSD regulations is discussed in Section 5.1.7.1. For sources subject to PSD, BACT is defined in 40 CFR 52.210) as: "an emissions limitation...based on the maximum degree of reduction for each pollutant subject to regulation under the Clean Air Act which would be emitted from any proposed major stationary source or major modification which the Administrator, on a case-by-case basis, taking into account energy,environmental, and economic impacts and other costs, determines is achievable for such source or modification through application of production processes or available methods, systems, and techniques,including fuel cleaning or treatment or innovative fuel combustion techniques for control of such pollutant..." The applicability of BACT requirements under District regulations is discussed in Section 5.1.7.3. The SJVAPCD defines BACT as: "the most stringent emission limitation or control technique of the following: • Achieved in practice for such category and class of source; • Contained in any State Implementation Plan approved by the Environmental Protection Agency for such category and class of source. A specific limitation or control technique shall not apply if the owner of the proposed emissions unit demonstrates to the satisfaction of the APCO that such a limitation or control technique is not presently achievable;or • Contained in an applicable federal New Source Performance Standard; or • Any other emission limitation or control technique,including process and equipment changes of basic or control equipment,found by the APCO to be cost effective and technologically feasible for such class or category of sources or for a specific source." [Rule 2201,Section 3.91 The federal PSD BACT requirement is applicable for NOx and CO,while the District BACT requirement is applicable for all pollutants. The emission rates and control technologies determined to be BACT for this project are discussed in detail in the following sections. For the CTG/HRSG, separate determinations are provided for normal operation and startup/shutdown operation. SAC/371322/082330016(LEC_5.1C_APPENDIX.DOC) 5.1C-1