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Projecf Approach 2-3 <br />RAS Pump Performance Curves <br />North Oimstetl YIIWTP • South Return Activatetl Sludgo Pumps <br />Optlon 3- Extended 61nch OpUo ? <br />50 <br /> <br />w <br /> <br />? <br />? <br />? <br />0 <br />w <br />x <br />20 <br />io <br /> <br />0 <br />0 75 150 225 300 375 450 . 525 600 675 750 825 900 <br />FLOW, GPM <br />-a-HsMinC=120 -s-HsMInC-100 -x-14aM0zC=100 -A- SYqtipnLoases -w-PUmpCurve <br />--0-MOdMiedCuNe tMinSpeed -2PUmpsMtnSpeed -m-BEP --*-60%BEP <br />ar 120% BEP -Runouf --*-Two Pumps Max Speed <br />2. Prepare background drawings of the existing SLB and the yard piping and tunnel A areas <br />using the drawings from the four previous improvement projects, field observations and <br />measurements, and descriptions of other modifications to equipment and piping in the <br />area implemented by plant staff. These base drawings will be visually field checked <br />together by both plant and M&E staff and will be the basis for preparing the phased <br />improvement plans for the centrifuge project. <br />3. Prepare sludge feed piping plans - phase I. Plans will include temporary centrate line, <br />sanitary drain line and centrifuge sludge feed line, and future I&C conduit. <br />4. Prepare sludge feed piping plans - phase II. Plans will include drain between the oxidized <br />sludge tanks, complete permanent centrate lines, remove unused buried yard piping, <br />remove temporary piping, construct new centrifuge sludge feed line, and convert the <br />temporary thermal conditioning feed line into a dewatering centrifuge sludge feed line. <br />5. Incorporate odor collection conduit modifications (from secondary retum well and SLB <br />to main odor collection header) into the yard piping plans to collect odors from the <br />centrifuge facilities and the SLB area. <br />FINAL PROFESSIONAL SERVICES: <br />1. Prepare SLB pumping & piping plans for centrifuge installation. <br />2. Prepare SLB conveyor modification plans. <br />