HIALEAH PRESTON WTP MISCELLANEOUS IMPROVEMENTS

3/18/2025 10:00:00 AM

Scope of Work: (Contractor must obtain and submit all permits prior to performing any work). DESCRIPTION OF PROJECT: This project consists of 3 volumes. Volume A is the Preston WTP SCADA Server Room Fire Suppression and HVAC Improvements. Volume B is the Preston WTP Radiator Catwalk Addition. Volume C is the Pipe Tap Installation at Hialeah WTP. B. Volume A generally consists of implementing improvements to the existing SCADA room by the installation of a new fire suppression systema and a backup HVAC system since the existing HVAC system does not supply an even temperature in the entire space, and the temperature for the electronics house in the room needs to be maintained at the same range in all locations within the room. 1. The HVAC improvements under this project will include: a. Redundant HVAC split DX system with a 100% back up. b. Associated mechanical, electrical, and plumbing upgrades to support the installation of a new HVAC system. c. Associated electrical and instrumentation and controls. Hialeah Preston WTP Miscellaneous Improvements 01 11 00 Issue for Bid November 2024 Page 3 of 9 ER No. C091297/W01768 2. The fire suppression improvements under this project will include: a. A SAPPHIRE Clean Agent System that quickly suppresses fires and protects sensitive equipment without causing harm to people or the environment. b. Clean Agent fire suppression system shall include fire detection system and clean agent releasing control panel and interface with existing site fire alarm system by relaying general alarm signals. c. The fire suppression system must be designed as a Class C Hazard and maintain 19% Oxygen level in server room. d. Conduit from the SCADA server room to the 2nd floor fire alarm panel will be provided. e. Fire suppression system to shutdown Server Room HVAC system via relay including closing of dampers before release of clean agent system. f. Fire suppression vendor to provide training on installed fire suppression system to SCADA and Plant staff. g. The door at the entrance of the SCADA server room must be replaced with a 2-hour rated door or an appropriately rated fire door. h. The window in the SCADA server room must be airtight and impact resistant. i. Installation of new ducts and lights due to the removal of the ceiling tiles to accommodate the fire suppression system. C. Volume B generally consists of the following. 1. Installation of the Catwalk platform deck at 9’-0” above the existing Radiator floor deck, approximately 1’-0” below the top of existing Radiators; the platform deck shall consist of steel floor grating supported on steel beam spanning along the longitudinal edges, and transverse frame with beams supported on steel pipe columns on both sides of the Catwalk, mounted on the existing W18x76 on the Radiator floor deck. 2. Fully extension of the existing Radiator floor deck between Radiators #1 and #2 approximately 7’-3” wide towards the West Hialeah Preston WTP Miscellaneous Improvements 01 11 00 Issue for Bid November 2024 Page 4 of 9 ER No. C091297/W01768 Wall of the Generator Building, with railing on both sides. This extended floor deck shall support the new inclined stair in the design item below. 3. Provide and install the New Inclined steel stair between Radiators #1 and #2 on the East side of the Catwalk; another new inclined stair shall be provided between Radiators #2 and Any part of the work which is not mentioned in the Specifications but is shown on the Plans, or any part not shown on the Plans but described in the Specifications, but which is necessary or normally required as a part of such work, or is necessary or required to make each installation satisfactorily and legally operable, shall be performed by the Contractor as incidental work without extra cost to WASD, as if fully described in the Specifications and shown on the Plans, and the expense thereof shall be included in the applicable unit prices or lump sum bid for the work 4. New Steel Catwalk will be built in compliance with Project Construction drawings & specifications, any discrepancy with dimensions, materials, type of welding, etc. must be notified to Engineer and wait for its response. D. This Section generally describes Volume C in general and provides an overview of the extent of the work to be performed under this Contract. The Contractor shall, except as otherwise specifically stated herein or in any applicable parts of the Contract Documents, provide and pay for all labor, materials, equipment, tools, construction equipment, and other facilities and services necessary for proper execution, testing, and completion of the work under this Contract. The project consists of the following work: 1. Pump A (Suction) – requires the installation of a new 1-in pipe tap and 1-in gate valve on side of pipe on the suction side of Pump A. 2. Pump A (Discharge) – requires the installation of a new 1-in gate valve at the existing tap located on the upstream side of the hydraulic control valve on the discharge side of Pump A. 3. Pump B (Suction) – requires the installation of a new 1-in pipe tap and 1-in gate valve on side of pipe on the suction side of Pump B. 4. Pump B (Discharge) – requires the installation of a new 1-in pipe tap and 1-in gate valve on side or top of pipe on the discharge side of Pump B. Hialeah Preston WTP Miscellaneous Improvements 01 11 00 Issue for Bid November 2024 Page 5 of 9 ER No. C091297/W01768 5. Pump 1 (Suction) – requires the installation of a new 1-in pipe tap and 1-in gate valve on side or top of pipe on the suction side of Pump 1. 6. Pump 1 (Discharge) – requires the installation of a new 1-in pipe tap and 1-in gate valve on side or top of pipe on the discharge side of Pump 2. 7. Pump 3 (Suction) – requires the installation of a new 1-in pipe tap and 1-in gate valve on side of pipe on the suction side of Pump 3. 8. Pump 3 (Discharge) – requires the installation of a new 1-in gate valve at the existing tap located on the upstream side of the hydraulic control valve on the discharge of Pump 3. No new pipe taps are required. E. It is the intent of the Department to obtain a complete and working installation under this Project and any items of labor, equipment or materials which may reasonably be assumed as necessary to accomplish this end shall be supplied whether or not they are specifically shown on the Plans or stated herein.

General Building Contractor, Electrical Contractor; Air Conditioning Unlimited