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clean, repair, and coat walls, floors, walkways, and effluent launders; d) identify and repair <br />concrete spalling locations; e) inspection and design of drive mechanism for sludge rake arms <br />and skimmers; f) replace effluent side sluice gates with stainless steel gates; g) replace <br />effluent junction boxes; h) replace sludge pumps #1 through #3 with above grade equipment <br />for Clarifier #1; and i) construct new scum wells with level actuated scum pumps and odor <br />control. <br />5. New Fixed-Film Reactor - Provide a new circular fixed-film reactor (FFR) with a diameter <br />up to 105-feet and with a media depth of up to 17-feet. The new FFR will have a concrete base <br />and asteel-framed upper portion. A dome will be provided for the new FFR for odor <br />containment and associated piping will be provided for process to the new FFR. For reference, <br />the estimated engineering cost of this element is $125,000. <br />6. Existing Fixed-Film Reactor Improvements -Provide refurbishment of the existing 105-foot <br />diameter circular FFR. Areas anticipated to require improvements include: a) concrete base <br />structure; b) steel-framed structure; c) dome; and d) media replacement. For reference, the <br />estimated engineering cost of this element is $110,000. <br />7. New Compost Odor Scrubber - Provide a new compost odor scrubber to replace the <br />existing compost odor scrubber that will need to be demolished to make room for the new FFR. <br />8. Existing Sludge Conditioning Tank Improvements -Provide coating and mechanical <br />improvements to the existing sludge condition tank to enable it to continue to operate as one of <br />the primary effluent flow equalization tanks. <br />9. Existing Sludge Reaeration Tank Improvements -Provide coating and mechanical <br />improvements to the existing sludge reaeration tank to enable it to continue to operate as one <br />of the primary effluent flow equalization tanks. <br />10. Existing Digesters 1, 2, and 4 Improvements -Provide the following improvements to <br />existing Digesters 1, 2, and 4: a) identify, repair, and coat interior concrete spalling areas for <br />Digesters 1 and 2; b) single Low Nox dedicated heat exchanger, hot water pump, recirculation <br />pump, and boiler with heat output to operate Digesters 1 and 2 together; c) mixing piping <br />improvements to Digester 1 to allow dual use of mixing pump between Digesters 1 and 2; d) <br />foam insulation for roofs of Digesters 1 and 2; e) a side man way for Digester 1; f) replacement <br />of roof top gas handling equipment and U-Tube assembly for Digester 2; g) piping to Digester <br />4 to allow for portable mixing capability; h) installation of redundant sludge piping (alternate <br />line) with clean outs for Digesters 1, 2, and 4; and i) thermal insulation for hot water and sludge <br />lines for Digesters 1, 2, and 4. <br />11. Existing Digester 3 Improvements - If this digester is determined to be needed for solids <br />handling purposes, provide: a) concrete and coating repair of interior concrete spalling areas <br />for Digester 3; and b) mechanical equipment and digester accessories to enable this tank to <br />operate as a digester, including installation of redundant sludge piping (alternate line) with <br />clean outs. <br />12. Existing Final Clarifiers 3 and 4 Improvements -Provide the following improvements to <br />existing Final Clarifiers 3 and 4: a) new weir trough energy dissipating deflector for Clarifier 3; <br />b) wash water manifold and covered effluent launders for Clarifier 3; c) rebuilding or <br />replacement of RAS pumps 1 and 2 for Clarifiers 3 and 4; d) rebuilding or replacement of scum <br />Consulting Services Agreement between Project No. 08-593-52-239 <br />City of San Leandro and Carollo Engineers, Inc. Page 28 <br />