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Table of Contents <br />1. Project Overview......................................................................................................................1 <br />2. Existing Conditions.................................................................................................................1 <br />Topography.........................................................................................................................1 <br />Drainage..............................................................................................................................2 <br />GroundCover......................................................................................................................2 <br />AdjacentAreas................................................................................. ....................2 <br />3. Conditions and Requirements Summary..............................................................................2 <br />Minimum Requirement No. 1: Preparation of Stormwater Site Plans................................2 <br />Minimum Requirement No. 2: Construction Stormwater Pollution Prevention ..................2 <br />Minimum Requirement No. 3: Source Control of Pollution................................................3 <br />Minimum Requirement No. 4: Preservation of Natural Drainage Systems and Outfalls.... <br />3 <br />Minimum Requirement No. 5: On -Site Stormwater Management......................................3 <br />Minimum Requirement No. 6: Runoff Treatment...............................................................3 <br />Minimum Requirement No. 7: Flow Control.......................................................................3 <br />Minimum Requirement No. 8: Wetlands Protection...........................................................3 <br />Minimum Requirement No. 9: Operation and Maintenance...............................................4 <br />4. LID Site Assessment ............................................................................................................... <br />4 <br />Lawn and Landscaped Areas..............................................................................................5 <br />Roofs...................................................................................................................................5 <br />Other Hard Surfaces...........................................................................................................5 <br />5. Permanent Stormwater Control Plan.....................................................................................6 <br />Predeveloped Hydrology..................................................................................................... <br />6 <br />DevelopedHydrology..........................................................................................................6 <br />FlowControl........................................................................................................................6 <br />WaterQuality Treatment..................................................................................................... <br />8 <br />6. Conveyance..............................................................................................................................9 <br />List of Figures <br />Figure 1-1: Site Map (King County iMap).........................................................................................1 <br />Figure 4-1: LID MR No. 5 Flow Chart (reference SWMMWW Figure 2.5.1)....................................4 <br />Figure 5-1: WQ MR No. 6 Flow Chart (reference SWMMWW Figure 2.1.1)..................................8 <br />Evergreen Branch Library Expansion — Dykeman, Inc. <br />iii <br />