Item 3: Ratification of FY11 MWMC Budget

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Metropolitan Wastewater Management Commission Capital Improvement Program WASTE ACTIVATED SLUDGE THICKENING Description: This project provides a third gravity belt thickener (GBT) and associated at-grade building improvements. The project also includes landscaping. Justification: Provides additional capacity for Waste Activated Sludge (WAS) thickening and, along with addition of primary sludge thickening, will help to eliminate the need for additional digester capacity. Status: Planning stage with the exception of landscaping (in keeping with the 2004 Facilities Plan landscaping budget allocations, funding from this project is being made available in FY 10-11 to accommodate staging of the plant-wide integrated landscape plan). Project Driver: Additional capacity to provide WAS thickening with one unit offline at upper limit flow projections. Nitrification required by the NPDES permit and increasing wastewater flows and loads generates more WAS solids. Provide ability to conduct recuperative thickening so that need for additional digestion volume can potentially be deferred. Project Trigger: Exceeding solids and hydraulic loading rate design criteria.The latest evaluations of need for Waste Activated Sludge thickening indicates a need by about 2012 or later. After the secondary treatment modifications are completed and operational for a time, the timing of need for this project should be reevaluated. Estimated Project Cost : $3,901,000 Improvement SDC Eligibility: 100% Expected Cash Flow: FY 06-07 = $7, 000; FY 08-09 = $0; FY 09-10 = $0; FY 10-11 = $200,000; FY 11-12 = $100,000; FY 12-13 = $200,000; FY 13-14 = $1,100,000; FY 08-09 = $2,294,000 Expenditure/Category:Prior Years2009-10 Est. Act.2010-112011-122012-132013-142014-15Total Design/Construction $7,000 $0$300,000 $0$3,594,000 $0$0$3,901,000 Other $0$0$0$0$0$0$0$0 Total Cost $7,000 $0$300,000 $0$3,594,000 $0$0$3,901,000 Page 64 DRAFT FY 10-11 BUDGET AND CIP