6115--526-21-107 Replace Main EMD Generators and Cooling Towers

ter, 130 West Kingsbridge Road, Bronx, New York 10468 and as specified on the plans, specifications, and contract documents. General Scope: . The purpose of this project is to The primary project objective is to replace the Main EMD Generators at the Bronx, NY VAMC. This includes renovations to the existing Motor Pool Building. As part of this effort, the tasks include evaluating locations for a new Load Bank and ensuring the project meets VA Physical Security and Resiliency Design Manual (PSRDM) mitigation measures. As part of the overall project, modifications to the site area around the Motor Pool Building and other new project features will be necessary to achieve the overall project goal. We are explicitly noting that it is the General Contractor s responsibility to complete all required work related to: Final relay settings Field testing and commissioning Coordination with the neutral grounding resistors All Protective Relays and PLCs are to be replaced with NEW equipment It is the General Contractor's responsibility to complete all required work related to all aspects of this contract. The VA has completed prior Market Research to identify acceptable sub-contractors for specific specialized work tasks. The coordination with all subcontractors is the FULL responsibility of the General Contractor. The pre-approved subcontractors and the related specific specialized work tasks are included within Drawing E-604. It is the Contractor s responsibility to ensure that the new configuration of the circuit breakers, controls, protective replaying, PT s, CT s, Test Switches, etc provide the specified emergency system operation scheme. The project entails design for replacement of existing EMD generators and their associated cooling towers. Modification of the existing Motor Pool Building to house new electrical switchgear serving the EMD Generators. Compliance with the PSRDM is required. The Motor Pool building has offices, work areas and a storage areas. The office and work areas are to remain. Existing storage room will be demolished. A new addition will be constructed to house the new electrical switchgear. Two means of egress are required, not through the Motor Pool Building. Addition must be constructed in accordance with the VA PSRDM. Two new dry coolers will replace the existing cooling towers and will be located on the roof of the new addition. The existing building is currently protected with a fire sprinkler system. The sprinkler system will be modified as necessary for this project. Piping will be extended from the existing system and designed to provide protection for the new switchgear room. The fire alarm system will be extended to provide notification and initiation devices for the new switchgear room. The existing building fire alarm site-wide panel is located on the first floor in the Graphic Control Room. All work shall be completed as specified on the plans, specifications, and contract documents. REPLACE EMD GENERATORS: CIVIL 1) Per PSRDM mitigation measures, bollards are needed near the building southwest corners and new exterior door locations. 2) Sidewalks, ramps and elevated pad are needed to accommodate new building exterior doors. 3) All exterior grades around the Motor Pool Building will be adjusted as necessary to accommodate the renovated building. 4) Curbing shall be replaced where necessary due to utility trenching. 5) The new load bank will be placed on a slope requiring a retaining wall to create a level pad area for the structure. The load bank is proposed to be best situated to conform to the existing slope and to avoid impact to the nearby existing sanitary sewer line. All grades shall be adjusted as necessary to accommodate the load bank pad and wall. A sidewalk/access will be needed to the load bank. 6) The building is proposed to expand over an existing sanitary manhole. The sanitary manhole collects sewage from Building 101, stormwater from the parking area north of the Motor Pool Building and overflow from a sand trap manhole to the south. The stormwater is currently piped under the Motor Pool Building. All existing stormwater connections to this manhole are proposed to be rerouted around the building. The manhole shall be removed, and the sanitary line extended to a new manhole outside of the new building expansion where it shall be routed back to the existing downstream sanitary sewer line. 7) The sanitary lateral from the Motor Pool Building shall also be replaced/reset to accommodate the access ramp to a new building doorway. 8) The existing out of service steam line from Building 101 to Building 16 shall be removed where needed to accommodate all new infrastructure, capped and abandoned in other areas. 9) A new security gate will be added near Building 102 (Fisher House). 10) Temporary erosion controls will be needed during construction. 11) All disturbed asphalt and concrete areas will need to be restored. All pavement markings disturbed shall be repainted. 12) All disturbed turf grass areas will need revegetated. STRUCTURAL 1) The existing walkway (Elev. 158 -5 ) needs to be demolished and replaced with a new platform to meet the maintenance requirement of the new equipment. 2) The existing generator pad will be verified with the installation requirement of the new generator. 3) New concrete equipment pad. 4) Extension on the existing equipment pad. 5) Partially demo the existing Motor Pool Building (MPB) to build the Electrical Switch Gear Building (ESGB). 6) Supporting new load bank 7) New cast-in-place concrete equipment pads will be installed for the proposed electrical and mechanical equipment as required. 8) Existing cast-in-place equipment pads will be extended as required to fit new equipment as required. 9) Two SCRs will be located at different elevations. The SCR 101-SCR-01 will be located on the radiator room floor while the SCR 101-SCR-02 will be installed in the generator room located on the SCR platform. 10) Additional WF steel will be added as required to support the new equipment on the floor and hangers for supporting the platforms in the generator room. 11) A new service platform will be installed to support two DPFs, starting from the North access door/landing (located at EL. 158 -5 ) to the edge location of the existing platform on the south side, between Column B6 and C4. The railing of the North access door/landing will be removed to accommodate this extension. 12) The door at the South-East shall be demolished and the opening of the door will be moving down to the floor elevation (EL. 158 -5 ) to accommodate the new access to the DPF s platform. (ii) A staircase will be attached to the new platform on the North side to facilitate access to the existing platform. (iii) A ladder will be installed on the South side to serve as an additional access point to the existing platform. 13) A platform for SCR (Selective Catalytic Reduction) equipment, including a 3ft wide maintenance area, will be installed approximately 4 ft above the existing platform. A ship ladder will be affixed to allow access to the maintenance area. 14) Safety guardrails will be installed around the service platform as per applicable safety standards and regulations to ensure the safety of personnel working on or around the platform. 14) The service platform will be supported by posts on the North wall side, while hangers will be