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Project Name: Headworks <br /> Expansion <br /> <br />Description: Expand headworks so that ail of the 2025 wet weather peak flow receives <br /> preliminary treatment. <br /> <br />Justification: New dry weather headworks that will be used in conjunction with the <br /> existing headworks (which will then be used for peak flow events) to <br /> provide preliminary treatment for a total peak wet weather flow of 277 <br /> mgd. <br /> <br />Project Driver: increases in peak wet weather flows resulting from the elimination of <br /> sanitary sewer overflows. <br /> <br />Project Trigger: Peak wet weather flows in excess of 210 mgd. <br />Type of Project 100% Capacity <br /> <br />Estimated Project Cost $12,800,000 <br />(2004 Dollars): <br /> <br />Phasing: Budgeted for FY2007/08 <br /> <br />Project Name: Primary Sludge Thickening Outside of Clarifiers <br /> <br />Description: Thin primary s~udge pumping and piping systems to thickeners, (covered <br /> for odor control), supernatant ovedlow pumping and piping, thickened <br /> sludge piping/pumping to digesters. See Odorous Air Treatment for <br /> treatment of odors. <br /> <br />Justificatior~: One of the projects that increases capacity of existing primary clarifiers <br /> from approximately 103 mgd to 165 mgd. <br /> <br />Project Driver: All peak wet weather flows must receive primary treatment prior to <br /> diversion and effluent blending to meet the current NPDES permit for total <br /> suspended solids. <br /> <br />Project Trigger: Primary clariher surface overflow rates exceeding 1800 gpd/sf: Sustained <br /> wet weather flows through the primaries in excess of 103 mgd after <br /> baffling improvements are made. <br /> <br />Type of Project 100% Capacity <br /> <br />Estiroated Project Cost $3,600,000 <br />(2004 Dollars): <br /> <br />Phasing: Budgeted for FY2007/08 <br /> <br /> <br />