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STATEMENT OF QUALIFICATIONS <br />1.01 Understanding of Need <br />Project Understanding <br />In 2016, Dudek was hired by the City of Santa Ana to develop a comprehensive rehabilitation plan for <br />Centennial Park Lake and the park area surrounding the lake. The goal of the rehabilitation project <br />was to identify problems, needs, deficiencies with the lake, lake equipment, the lake park area, lake <br />Visitor behavior, and lake maintenance in order to develop a comprehensive remediation plan to <br />address each identified deficiency. A detailed outline of identified lake deficiencies separated into (7) <br />major lake management categories and the proposed design solution for each deficiency is provided <br />below. <br />TABLE 2. DESIGN SOLUTIONS FOR LAKE DEFICIENCIES <br />lency 'u <br />identiffiedProbleinor4ifici D d6k Lake Renovation Plan Design Sbluflon <br />1. Maintenance Personnel and Lake User Safety <br />a. Electrical hazards <br />Abandon / demolish existing pump vaults and equipment <br />I. Faulty or inoperable pumps/wiring� <br />and provide complete redesign of pump vaults and <br />electrical wiring system with appropriate safety <br />measures and controls meeting current code <br />ii. Exposed high voltage connections in hand <br />vaults <br />requirements. New pump vaults to include Independent <br />control panels, safety switches, pumps, plumbing, air <br />iii. Pump vault flooding/ water infiltration <br />compressors, air circulation fans, lighting, sump pump, <br />locking lids, safe access, and ladders <br />iv. Unlocked vault lids <br />b. Trip hazards in amphitheater area <br />To be resolved in a separate park renovation project <br />I <br />_ <br />i. Broken and lifted concrete <br />1. Lake Circulation <br />a. Accumulation of floating trash on water <br />Properly sized and properly located and the correct j <br />surface <br />quantity of lake skimmers will be included in our design <br />to remove floating debris from the lake <br />b. inoperable pumps, only a few working <br />A complete redesign of the lake circulation system <br />including 6 new pump vaults and a complete renovation <br />of the main pump vault is included in our lake renovation <br />I. Main pump station inoperable <br />plan <br />3. Lake Aeration <br />a. No aeration observed <br />A complete redesign of the lake aeration system <br />b. Inoperable air compressors <br />including 6 new air compressors and a complete <br />renovation of the main pump vault air compressor is <br />included in our lake renovation plan <br />c. No operating jets or fountains <br />The lake renovation plan includes a fountain jet with the <br />ability to spray a cascading jet of water up to 60 -ft in the <br />air and a recirculating stream water feature element to <br />provide additional aeration and oxygenation of the lake <br />_ <br />d. Water samples indicate DO at 6 mg/I <br />water <br />e. Lake bottom releases high concentration ! <br />- <br />The improved lake aeration system and along with —a <br />of hydrogen sulfide gas when disturbed <br />vertical and horizontal circulation and mixing system <br />(rotten egg smell) <br />along with the biological filtration system included in the j <br />lake renovation plan will eliminate the development of <br />anoxic zones in the lake that produce sulfides <br />DUDEK Proposal for Centennial Lake Renovation 6 <br />25E-19 <br />