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DIGESTER MIXING IMPROVEMENTS <br />Facility Process Component <br />Secondary Treatment <br />$2,000,000 <br />Total Cosf <br />Costs <br />Design & Engineering <br />Construction <br />1 <br />FUNDING SOURCE <br />Capital Reserve <br />Im t <br />PRIOR <br />EXPEND- 2004-05 2005-06 2006-07 2007-08 2008-09 TOTAL <br />ITURES <br />200,000 <br />~ ann nnn 200,0 <br />0 <br />0 <br />II provemen ment SDC Reserve I I 1 320 000 ~ ~ 1 32i <br />TOTAL I OI 2 00_ o_ n_ n_n_ n I ,.I <br />~i Uj U L,UUI <br />PROJECT: Digester Mixing Improvements Design and Construction <br />DESCRIPTION: Replace existing gas mixing system with a pump mixing system. <br />JUSTIFICATION: This project will increase the active volume of the digesters, thus allowing for additional <br />solids stabilization volume and potentially deferring the need to construct an additional <br />digester. <br />PROJECT DRIVER: Need for improved digester mixing to increase active digester volume. <br />PROJECT TRIGGER: Sludge residence time (SRT) and volatile solids reduction design criteria. <br />TYPE OF PROJECT: 50% Capacity; 50% Performance <br />ESTIMATED PROJECT COST $2,000,000 <br />(2004 Dollars): <br />PHASING: Budgeted for FY 2004/05 <br />Page 59 FY 04-OS BUDGET AND CIP <br />