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STATEMENT OF QUALIFICAITONS The system design redundancies reflect good lake ecosystem design practices to provide overlapping controls of the numerous elements that affect water quality of the lake so that the lake can self -adjust to changes in the local environment and self -maintain desirable water quality under most conditions. Final design and Construction documents Phase Upon completion of review of the 60% Design Development project plans, the Dudek team will transition into Final Design and (90%-100%) Construction Documents. The final design phase of the project is the phase when all of the final design detailing and Information is added to the construction plans to create a design that clearly reflects the design Intent and conveys the construction information to the project construction contractor. In this final phase of design all of the information and details necessary to construct and implement the complete lake renovation plan will be included in the construction plans and specification documents. The final design will include a complete set of construction plans, specifications, engineer's estimates, and a Lake Manual. Dudek will coordinate with OCWD and obtain final construction details and information from OCWD to coordinate their final design details and modifications of the existing pump vault wet -well to accommodate backwash discharge from their nearby injection well. Some of the unique features that will be included in our final construction documents and plans include the following: • Our design plans will be reviewed by our in house public and personnel safety specialist to provide input and insight on safety issues to minimize potential safety hazards present In the design of the renovation plan. Our design plans will include design of a water quality control system including a biological filter and lake aeration system designed by a treatment system design engineer with a PhD in treatment system design. We recommended that lake nutrient loading be mitigated by circulating lake water through a biological filter, Biofilters utilize naturally occurring microorganisms to consume and transform lake water nutrients and dissolved organics, which minimizes algae growth and improves water clarity. FIGURE 4. EXAMPLE OF PROPOSED BIOFILTRATION SYSTEM TO 6IOrILTER MANIFOLD Our design plans will include grading design and a plant palette developed by a waterfowl specialist, restoration ecologist, and a landscape architect working together to design and create a habitat Island and an environment that is favorable to native waterfowl and encourages non-native and migratory species to migrate on their normal pattern. Our design plans will include an aquatic vegetation planting plan for the lake designed by a landscape architect, botanist, water quality treatment engineer, and fishery DUDEK Proposal for Centennial Lake Renovation 14