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Metropolitan Wastewater Management Commission Capital Improvement Program <br />CLARIFIER IMPROVEMENTS <br />Description: <br /> Clarifier Improvements (originally Primary Clarifier Enhancements, Secondary Clarifier <br />thth <br />Enhancements and new 9 and 10 Secondary Clarifiers). <br />Status: <br />The MWMC clarifier construction work was completed by MKB Constructors (general <br />contractor). The construction contract included three milestones that relate to different warranty <br />timelines. As of December 16, 2009, staff is working with the MWMC legal team to address a <br />galvanizing issue (defective workmanship claim) related to the secondary clarifiers and <br />evaluating the performance requirements of the upgraded secondary clarifiers. Additional <br />follow up work is anticipated to address cathodic protection system upgrades. <br />Justification: <br /> Enhancing the existing clarifiers will increase primary and secondary treatment capacity and will <br />maximize the facilities investment in existing infrastructure. Adding the two new clarifiers will <br />increase secondary treatment capability and increase ability to handle peak flows. <br />Project Driver: <br />Increase capacity to treat base and peak flows and improve effluent quality and reliability so <br />that a blended primary and secondary effluent can meet the current National Pollutant <br />Discharge Elimination System (NPDES) total suspended solids limits. <br />Project Trigger: <br />From the MWMC 2004 Facilities Plan, the trigger for this project is unacceptably high clarifier <br />surface overflow rates and wet weather flows. <br />Project Type: <br />100% Capacity – Primary Clarifier Enhancements <br />50% Capacity and 50% Performance – Secondary Clarifier Enhancements <br />thth <br />100% Capacity – 9 and 10 Secondary Clarifiers <br />Estimated Project Cost: <br />Revised budget for this project was $17.48 million. Estimated cost to complete is $15.58 <br />million. <br />Expected Cash Flow: <br />FY 04-05 = $130,325; FY 05-06 = $1,511,663; FY 06-07 = $8,944,368; <br /> FY 07-08 = $4,174,004; FY 08-09 = $151,657 09-10 = $180,000; <br /> FY 10-11 = $494,339 <br />2009-10 <br />Expenditure/Category:PriorYearsEst. Act.2010-112011-122012-132013-142014-15Total <br />Design/Construction $14,912,831 $180,000 $494,339 0000$15,586,356 <br />Other 00000000 <br />Total Cost $14,912,017 $180,000 $494,339 $0$0$00$15,586,356 <br />Page 54 DRAFT FY 10-11 BUDGET AND CIP <br />