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SOUTH AERATION BASIN IMPROVEMENTS <br /> <br /> Facility Process Component <br /> Secondary Treatment <br /> <br />$6,900,000 <br />Total Cost <br />Design & Engineering 690,000 690,000 <br />Construction 6~210,000 . 6,210~000 <br /> TOTAL [~:~:.}~i?~ :' ~ i~::?~' ~:=~0 <br />FUNDING SOURCE <br />Capital Reserve 2,829,000 2,829,000 <br />Improvementment SDC Reserve 4,071,000 4,071,000 <br />TOTAL <br /> <br />PROJECT: South Aeration Basin Improvements Design and Construction <br /> <br />DESCRIPTION: Add step feed, anoxic selectors, and fine bubble diffusers to south aeration basin. Remove <br /> hyd~ulic restrictions in both south and north aeration basins (effluent gates). Includes <br /> future pdmary effluent flow control gates for both north and south aeration basins. <br /> <br />JUSTIFICATION: Increase the dry weather aeration basin treatment capacity to 65 mgd with respect to <br /> ammonia (i.e., with nitrification) and increase the sustained (i.e., on a weekly basis) wet <br /> weather treatment capacity to 130 mgd. <br /> <br />PROJECT DRIVER: NPDES permit includes ammonia limit requiring nitrification in dry weather and expansion of <br /> wet weather capacity to treat wet weather flows to meet NPDES monthly and weekly <br /> suspended solids limits. <br />PROJECT TRIGGER: Maximum mOnth dry weather flow of 25 mgd requiring nitrification. May flows and <br /> temperatures could require the use of the south aeration basins in conjunction with the <br /> north aeration basins. Peak wet weather flows above 103 mgd require hydraulic <br /> modifications. <br /> <br />TYPE OF PROJECT: 50% Capacity; 50% Performance <br /> <br />ESTIMATED PROJECT COST $6,900,000 <br />(2004 Dollars): <br /> <br />PHASING: Budgeted for FY 2004/05 <br /> <br /> Page 68 <br /> <br /> <br />