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APPENDIX 5.1E Construction Emissions and Impact Analysis 5.1 E.1 Onsite Construction The initial construction of the LEC is expected to last approximately 24 months. Construction activities will occur in the following main phases: Site preparation; Foundation work; Installation of major equipment;and Construction/installation of major structures. 5.1E.1.1 Construction Activities The construction of LEC will begin with site preparation activities,which include installation of drainage systems,underground utilities and conduits, grading and backfilling operations,and installation of pilings. After site preparation is finished,the construction of the foundations and structures is expected to begin. Once the foundations and structures are finished,installation and assembly of the mechanical and electrical equipment are scheduled to commence. Fugitive dust emissions from the construction of the project will result from: • Dust entrained during site preparation and grading/excavation at the construction site; • Dust entrained during onsite travel on paved and unpaved surfaces; • Dust entrained during aggregate and soil loading and unloading operations; and • Wind erosion of areas disturbed during construction activities. • Combustion emissions during construction will result from: • Exhaust from the diesel construction equipment used for site preparation, grading, excavation,trenching, and construction of onsite structures; • Exhaust from water trucks used to control construction dust emissions; • Exhaust from portable welding machines; • Exhaust from pickup trucks and diesel trucks used to transport workers and materials around the construction site; • Exhaust from diesel trucks used to deliver concrete,fuel, and construction supplies to the construction site;and SAC/371322/082330017(LEC_5.1 E_APPENDIX.DOC) 5.1 E-1