2000-074 Ordinance - Laserfiche WebLink

Home Browse Search

Mr. Foster McMasters Metcaif & Eddy of Ohio, Inc. Ntay 16, 2000 Page 3 of 14 Since early 1998, several components for the 2000 Dewatering Centrifuge Project have been purchased and installed. These components include a new electrical distribution conduit between the existing Odor Crroup B/C Motor Control Center (MCC) and the Sludge Loadout Building (SLB), a polymer feed pump and new variable frequency drives (VFDs) for the Thermal Conditioning Sludge Feed Pumps. Presently, the City is investigating purchase and installation of new mixed sludge grinding devices to replace the existing devices located on the suction side of the Theimal Conditioning Sludge Feed Pumps. The technical data for the polymer feed pump and the new VFDs are included in Attachment 2 to this letter. As each component is selected andior procured by the City, the product data sheets will be provided to the selected design professional at the time of the selection and/or procurement. This will aid in the incorporation of each component in to the design work of the proj ect. General Information for the Professional Services for the 2000 Dewatering Centrifuge Project The professional services shall be completed in ttvo separate parts. The first part of the ? services are identified in this request as the Inirial Professional Services. The second part of the services are identified in this request as the Final Professional Services. The first part includes certain hydraulic analyses, prepazation of drawings and other detail design services for the future centrifuge sludge feed pumping and piping, the future centrate line to the existing Secondary Retnrn Well and a future I&C conduit. The first part of the services essentially includes all work outside of the SLB. The second effort includes a SLB pumping, piping, conveyor and electrical and I&C control panels aud conduiting layout plan, profile and details drawings. The second effort also includes detailed machinery and tankage support slab design services for the equipment to be placed inside the SLB according to the final SLB layout drawings. Therefore, the second part of the services essenrially includes all work inside of the SLB. Given the need to operate the existing facilities during construction of the project, it is necessary to analyze and design the complete dewatering centrifuge sludge feed system, the centrate line and an I&C conduit in two phases. When both phases are cornplete, existing Thermal Conditioning Sludge Feed Pumps and discharge piping will have been modified into a complete dewatering centtifuge sludge feed system capable of supporting two com- plete dewatering centrifuge systems. The first phase will a11ow the existing LPO 1 unit and the existing vacuum filtrarion units to remain operable as the complete dewatering centrifuge system is brought into operation during 2000. The second phase would be completed after ?