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Metropolitan Wastewater Management Commission Capital Improvement Program <br />WASTE ACTIVATED SLUDGE THICKENING <br />- . w_ <br />_- - { <br />;. <br />,: ~ ,. ; <br />~~1p~ _ <br />4w. ., R ,on+a ~ 1leratlon ~ //`~`'~~ //~+,~ _ j <br />PN ~ ~ B IMJInJ L-~daslna ~ ( } ~ f~( Ir(etw r _+. k: S <br />__i <br />! .ii yGnlckwyna~F~cIJNy t <br />Y '. ~. <br />"3 ~ sae J~ii~` 6~ ~~ <br />2 iv $ <br />!J <br />Project Phasing <br />' Eu4~'ra-- 5(' rx)ficlil'A'Pf.f' ~v.. <br />r _- _. <br />`' <br />Description: Third gravity belt thickener (GBT) with associated at grade building. Assumes additional <br />basement floor space is not required. Includes funds for landscaping in vicinity of thickeners. <br />Justification: Provides additional capacity for WAS thickening and, along with addition of primary thickening, <br />,• will help to eliminate the need for additional digester capacity. <br />Project Driver: Additional capacity to provide WAS thickening with one unit ofFline at WWMW upper limit flow <br />projections. Nitrification required by the NPDES permit and increasing wastewater flows and <br />loads generates more WAS solids: Provide ability to conduct recuperative thickening so that <br />- need for additional digestion volume can potentially be deferred. <br />Project Trigger: Exceeding solids and hydraulic loading rate design criteria. The latest evaluations of need for <br />Waste Activated Sludge thickening indicates a need by about 2012 or later. After the secondary <br />treatment modifications are completed and operational for a time, the timing of need for this <br />project should be reevaluated. <br />Project Type: 100% Capacity <br />Estimated Project Cost: $3,391,000 (2012 dollars) <br />Expected. Cash Flow: FY 11-12 = $3,391,000 <br />j Expenditure/Categor~r: Prior Years 2007-08 2008-09 2009-10 2010-11 2011-12 Total <br />Design/Construction 0 0 0 0 0 .$3,391,000 $3,391,000 <br />Other 0 0 0 0 0 0 0 <br />Total Cost $0 $0 $0 $0 $0 $3,391,000 $3,391,000 <br />' Funding Source: Prior Years 2007-08 2008-09 2009-10 2010-11 2011-12 Total <br />Capital Reserve 0 0 0 0 0 $2,753,000 $2,753,000 <br />. EPA Grant 0 0 0 0 0 0 0 <br />SDC Reimbursement Reserve 0 0 0 0 0 $255,000 $255,000 <br />SDC Improvement Reserve 0 0 0 0 0 $383,000 $383,000 <br />Equipment Replacement Reserve 0 0 0 0 0 0 0 <br />j Total Cost $0 $0 $0 $0 $0 $3,391,000 $3,391,000 <br />Page 63 FY 07-08 BUDGET AND CIP <br />