CD 1.04 Chlorine Building

The Work consists of furnishing materials, labor, and equipment necessary for the rehabilitation of the existing Chlorine Building at the South District Wastewater Treatment Plant (SDWWTP) owned and operated by the Miami-Dade Water and Sewer Department (DEPARTMENT), and located at 8950 SW 232nd Street in Miami, Florida. At this facility, the existing Motor Control Centers (MCCs) used for the operation of the existing Flushing Water Pumps will be replaced. The purpose of the work will be to provide new electrical and instrumentation facilities for the adequate operation of the existing Flushing Water Pumps and other miscellaneous equipment. B. The work at the SDWWTP existing Chlorine Building will be divided mainly in two (2) areas. Area 1 is the main facility (existing Chlorine Building) where the MCCs are located and also houses the existing Flushing Water pumps and its electrical facilities which provides non potable water to be used within the SDWWTP premises. Area 2 is basically the underground duct banks between the Substation No. 11 and No.12 Building and the existing Chlorine Building. The Substation No. 11 and No.12 Building encloses the Substation No. 11 with its corresponding Switchgear No. 11 and the Substation No. 12 with its corresponding Switchgear No. 12. The power for the existing MCC-A is fed from Switchgear No. 11 and the power for the existing MCC-B is fed from Switchgear No. 12. C. The work in Area 1 will be limited to replace the existing MCC-A and MCC-B, provide six (6) new VFD Cabinets (one for each pump), provide a new Auxiliary RTU, replace electrical distribution panelboards and a Dry Type Transformer, and install new Roof Exhaust and additional conduits to provide adequate Ventilation System. As part of this rehabilitation, the existing Built-up Roofing will be replaced with a new one. D. The work in Area 2 will be limited to replace the existing feeders from Switchgear No. 11 to MCC-A and from Switchgear No. 12 to MCC-B with new feeders through existing duct banks. No new duct banks are being contemplated for this work. E. The DEPARTMENT will pre-purchase and make available to the CONTRACTOR the new Auxiliary RTU, the new MIS Network Switch, and Fiber Optic cable to be installed inside the existing RTU SD12 by the Owner and the new Operator Interphase Terminal (OIT) to be installed at each RTU enclosure. All the Fiber Optic terminations will be performed by the Owner. Also, terminations between the new Auxiliary RTU and the existing RTU SD12 will also be performed by the Owner. F. The Main Work under this contract, which is the replacement of the two MCCs and the installation of new VFD Cabinets, will require the construction of a new reinforced concrete slab inside the existing Chlorine Building to comply with the Design Flood Elevation (DFE). This new reinforced concrete slab will have a finished floor elevation of +16.0’ NGVD. This elevation has been selected by the DEPARTMENT as a flood protection elevation for critical equipment to account for the effects of potential climate change, sea level rise and storm surge. G. Control of the system will be provided through the new Auxiliary RTU and the existing RTU SD12 Control Panels installed at the existing RTU Room. All field instrumentation and controls wiring will be terminated by the CONTRACTOR inside Auxiliary RTU Panels, from which all applicable wiring connections will be made to the RTU Control Panels at each site. The RTU Control Panel will communicate with the DEPARTMENT’s SCADA network through a fiber optic network.

Division 02 -	Existing Conditions, Demolition, Selective Demolition, Selective Interior Demolition.
Division 06 -	Wood, Plastics, and Composites, Rough Carpentry, Finish Carpentry.
Division 07 -	Thermal and Moisture Protection, Dampproofing and Waterproofing, Thermal Protection.
Division 08 -	Openings, Doors and Frames, Windows.
Division 09 -	Finishes, Plaster and Gypsum Board, Ceilings, Flooring, Painting and Coating.
Division 21 -	Fire Suppression.
Division 22 -	Plumbing.
Division 23 -	Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution.
Division 26 -	Electrical, Lighting.