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STATEMENT OF OUALIFICAITONS <br />Additional appurtenant facilities such as ventilation fans, lights, receptacles, security measures (e.g. <br />cameras), etc. will be incorporated Into this facility to enhance the operator's safety. This facility will <br />be equipped with SCADAfor remote monitoring and control. Precise control and monitoring of the (6) <br />smaller pump vaults is not as critical, and, therefore it is proposed that these pump vaults are not to <br />be equipped with SCADA in an effort to reduce engineering and construction costs. <br />Six (6) Small Pump Vaults: In addition to the large pumping facility, several local recirculation pumps <br />and aerators are needed to improve and maintain the water quality in Centennial Lake. The approach <br />illustrated In Figure 2 Indicates that (6) small identical vaults containing (1) small recirculation pump, <br />(1) air compressor (to supply air to the aerators), (1) sump pump to convey nuisance water collected <br />in this vaults, (1) corrosion proof ventilator, and lights/receptacles for operations/malntenance use will <br />be located at various points around the periphery of the lake. Utilizing one design and layout (Figure <br />3) for these facilities reduces engineering and construction costs. In addition, It makes future <br />maintenance less costly and simplifies maintenance for the operators because the interior layout and <br />components for each vault is identical. All of the piping connections to the vaults will be small (less <br />than 3 -inches) and can be easily picked up on the exterior of the vault and routed to their destination. <br />PIPE " <br />WE pEWML <br />if <br />9I6GMNAUENWL <br />44,60' TO <br />FIGURE 3. TYPICAL PUMP STATION DETAIL <br />OIWNS17 PEI <br />OR"' <br />PL -Nae. DOME, <br />1O0610N M51M DOOR. <br />(MOT M W O <br />.VlIT.!,JY/LJ/.Z.TAJIIIIL: <br />NWS. 49,60' <br />t <br />W" T44X JOINT <br />0` C,E <br />CHECK YALYE <br />0,1, MOTU <br />MO. 1VWQV. <br />�rfilQN B—B <br />21 <br />PAOO PUMP <br />401 3 IN <br />0 I <br />wliN 6ax cocN <br />VALVE r. <br />tl" fNC 9U DRFLY <br />61,64 TOP VADA <br />�^ PINIOH CPAOE PEO <br />IANDSOAP MCf11TECi <br />(40,0*) <br />48.0' / E IMiN4 SKIMMIKN <br />AOR PJC I .l <br />UCWN YGE, <br />NVC SAL i I i i / <br />I I 1 <br />I 1 <br />1L I <br />Ll <br />JOINN EX169N0 <br />PJC PIPE <br />Our approach to the renovation of the pump vaults and electrical wiring is to abandon the existing <br />facilities in place and disconnect/safe-off the existing electrical feed in accordance with current the <br />National Electric Code. There are several load centers around the Centennial Lake facility which <br />power existing vaults with a 240 volt, 3-phase breaker. Once the existing power is disconnected to <br />the existing vaults, the existing breaker can be replaced in the load center and a new feeder circuit <br />can be constructed from the existing load center to the new small pump vault. A sub -panel is proposed <br />to be located inside each of the small pump vaults to minimize trenching, conduit/wiring, costs, and <br />disruption between the existing load center and the small pump vault. A disconnect switch with a <br />simple combination motor starter (on/off/reset) is proposed to operate the air compressor and small <br />recirculation pump. An integral pressure switch will regulate the on/off cycles for the air compressor. <br />The fractional horsepower blower will operate continuously and can be turned on/off with a disconnect <br />DUDEK Proposal for Centennial Lake Renovation 12 <br />