Attachment A - 1852260_ESOW.pdf
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- Solicitation number
- N4008526R0246
About this file
This is an Executable Scope of Work (SOW) for a federal construction project at Naval Support Activity Norfolk, Virginia.
The project involves installation of backup cooling for server room 1231 in Building N-26 at Naval Station Norfolk. The primary deliverable is a 10-ton Computer Room Air Conditioning (CRAC) unit configured as a downflow unit that pressurizes the raised floor with perforated floor tiles, with an open return at the top. The existing 10-ton packaged DX TRANE unit will serve as backup cooling. The contractor must provide supervision, labor, materials, and equipment to complete all work in accordance with standard industry practices, applicable local/state/federal codes, and the Unified Facilities Criteria. Demolition work includes removal of a non-operational ceiling-mounted cooling unit with controls and condensing unit, one 2x4 recessed lighting fixture (to be turned over to government), one emergency light fixture (to be relocated), existing raised access floor tiles (to be salvaged), existing ceiling tiles (to be salvaged), and existing walls in a toilet stall. New work includes installation of the 10-ton CRAC unit with humidifier system on the east wall, a 110-amp 3-pole circuit breaker with 4-#3 conductors in 1-1/4" conduit, a 25-amp 3-pole circuit breaker with 4-#10 conductors in 3/4" conduit for the exterior-mounted air-cooled condensing unit, perforated raised access floor tiles, relocated emergency light fixture, matching wall finishes in the toilet stall, and wall penetrations for HVAC and electrical connections. The scope includes exterior ductwork insulation replacement with weather-resistant material and resealing of existing ductwork.
Work must be performed during regular government working hours (8.5-hour workday, Monday-Friday, excluding holidays) around an occupied building. The contractor must obtain Contracting Officer approval before building entry, maintain building security, provide protective coverings for existing work, repair any damage at no additional cost, and obtain written permission 15 calendar days prior to interrupting roads, railroads, or utility services. Roofing system openings must be limited to work recoverable by day's end and resealed before work suspension. The contractor must submit shop drawings, manufacturer data, test reports, certificates, warranties, work schedules, equipment lists, and construction laydown site plans prior to construction start. Safety compliance with U.S. Army Corps of Engineers Manual EM-385-1-1 is required, including submission of an Accident Prevention Plan and Activity Hazard Analysis 15 calendar days before the pre-performance conference. The project POC is Lakisha D. Atkins (757-322-2652). All demolished materials must be disposed of off-base with complete daily jobsite cleanup.
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eProjects No: 1852260
Executable Scope of Work
Building N-26 Mountable AC Units at the
Naval Support Activity, Norfolk, Virginia
PREPARED BY:
NAVFAC MID-ATLANTIC
Facilities Engineering and Acquisition Division
Public Works Department
Norfolk, Virginia
SUBMITTED BY:
Design Manager: Richard Corbin
Architectural: Richard Corbin
Plumbing / Mechanical William Wisilosky
Electrical / Telecom Joseph Godfrey, P.E.
Date: January 7, 2026
APPROVED BY:
Project Management & Engineering Director: John C. Miller, P.E.
Design Director: James M. Smith, R.A.
For Commander, NAVFAC MID-ATLANTIC:
Date:
N-26 Mountable A/C Units Project Executable Scope eProjects No.: 1852260
PWD Norfolk, Facilities Engineering and Acquisition Division Form Version 2024.06.27 Page 1 of 10 eProjects Work Order No: 1852260
Maximo SR Number: 25813813
Building: N-26
Project Title: Mountable A/C Units Project
Customer:
BASE CO NAVFAC CNRMA ADMIN
Project POC Lakisha D. Atkins lakisha.d.atkins.civ@us.navy.mil 757-322-2652
Funding POC Lakisha D. Atkins lakisha.d.atkins.civ@us.navy.mil 757-322-2652
Scope By: Architectural/ DM Richard Corbin richard.corbin19.civ@us.navy.mil 757-341-0208
Mechanical William Wisilosky william.j.wisilosky.ctr@us.navy.mil 757-341-0635
Electrical Mark Godfrey, P.E. joseph.m.godfrey7.civ@us.navy.mil 757-341-1681
Date:
January 7, 2026
1. General Description:
The contractor must provide supervision, labor, material, and equipment required to perform all work for the following project: Provide back-up cooling for the server room. Refer to section 7 “Project Overview and Work Requirements” for additional information.
All work must be performed in accordance with, but not limited to the following:
Standard industry practices.
Applicable local, state, federal codes, laws, and regulations.
The Unified Facilities Criteria.
2. Location:
The work is located at Building N-26, Naval Station Norfolk, Virginia, approximately as indicated. The exact location will be shown by the Contracting Officer. Refer to attachment 9.1 Location map of Naval Station Norfolk – Building N-26.
3. Special Scheduling Requirements / Work Procedures:
3.1 Utility Services will be in accordance with the procedures in FAR 41.202.
3.2 The work must be performed during regular Government working hours. Regular working hours must consist of an 8-1/2-hour period established by the Contracting Officer, Monday through Friday, excluding Government holidays.
3.3 The Contractor will be working around an existing building which is occupied. Do not enter the building without prior approval of the Contracting Officer.
3.4 The existing buildings and their contents must be kept secure at all times. Provide dust covers or protective enclosures to protect existing work that remains.
3.5 Damage caused by construction operations must be repaired, patched and/or replaced to match adjacent areas to the satisfaction of the Contracting Officer at no additional cost to the Government.
Form Version 2024.06.27 Page 2 of 10
3.6 Permission to interrupt any Activity roads, railroads, or utility service must be requested in writing a minimum of 15 calendar days prior to the desired date of interruption.
3.7 When removing the existing roofing system, remove only as much roofing as can be recovered by the end of the workday, unless approved otherwise by the Contracting Officer. Do not attempt to open the roof covering system in threatening weather. Reseal all openings prior to suspension of work the same day.
4. Safety:
4.1 All work must be conducted in a safe manner and must comply with all requirements of the U.S.
Army Corps of Engineers Safety Health Requirements Manual EM-385-1-1.
4.2 Contractor must submit an Accident Prevent Plan (APP), and Activity Hazard Analysis (AHA) for approval by the Contracting Officer. Submit the APP and AHA to the Contracting Officer 15 calendar days prior to the pre-performance conference for acceptance.
5. Submittals:
5.1 The Contractor must submit the following documents required for government approval, prior to the start of any construction activities:
Shop Drawings Manufacturer’s Product Data Test Reports Certificates Manufacturer’s Warranties Work Schedule Equipment List Site Plan for Construction Laydown Area Additional submittals as required for the project
5.2 The Contractor must submit all required data together for the following spec sections:
23 03 00.00 20 Basic Mechanical Materials and Methods 23 07 00 Thermal Insulation for Mechanical Systems 23 09 00 Instrumentation and Control for HVAC 23 09 23.02 BACNET Direct Control for HVAC/Other Bldg. Control Systems 23 81 23 Computer Room Air Conditioning Units 25 05 11 Cybersecurity for Facility-Related Control Systems 26 20 00 Interior Distribution System
Form Version 2024.06.27 Page 3 of 10
6. Project Overview and Work Requirements:
6.1 Project Overview:
a. The project is to provide back-up cooling for sever room 1231. It is to utilize a Computer Rooma Air Conditioning Unit (CRAC) system for back-up cooling for the space as the primary source of conditioning the space. The unit shall be a downflow unit pressurizing the raised floor with perforated floor tiles located in the rear of the server racks that allow air to flow through the racks to cool the servers. The CRAC will have an open return at the top of the unit for the return air. The existing 10-10 packaged unit shall sever as the back-up to the CRAC unit in the event the CRAC unit stops working.
6.2 Demolition – Work Requirements
a. Remove the ceiling mount cooling unit, controls and corresponding condensing unit on the east wall complete including piping, hangers and controls. This unit is not operational any longer. Refer to demo drawings for additional information.
b. Remove one 2x4 recessed lighting fixture and turn over to government.
c. Remove one emergency light fixture and save to be relocated.
d. Remove and salvage existing raised access floor tiles. Refer to drawings for additional information.
e. Remove and salvage existing ceiling tiles. Refer to drawings for additional information.
f. Remove existing walls and finish in toilet stall. Refer to drawings for additional information.
6.3 New Work – Work Requirements
a. Provide one 10-ton CRAC unit cooling with a humidifier system on the east wall.
b. Provide one 110 amp, 3-pole circuit breaker in spaces 37, 39, and 41 in existing Panel HP in room 1231 to feed 10-ton CRAC unit. Provide 4-#3, 1-#6 ground, in 1-1/4” electrical metal conduit from 110 amp, 3-pole circuit breaker to the factory installed disconnect on 10-ton CRAC unit. See drawing EP101.
c. Provide one 25 amp, 3-pole circuit breaker in spaces 38, 40, and 42 in existing Panel HP in room 1231 to feed exterior mounted Air Cooled Condensing unit. Provide 4-#10, 1-#10 ground, in 3/4” rigid metal conduit from 25 amp. 3-pole circuit breaker to factory install disconnect on the Air Cooled Condensing unit. See drawing EP101.
d. Relocated one emergency light fixture to wall as shown on drawing EP101.
e. Provide perforated raises access floor tiles. Refer to drawings for additional information.
f. Reinstall salvaged ceiling tiles. Refer to drawings for additional information.
g. Provide wall finishes to match existing in toilet stall. Refer to drawings for additional information.
h. Provide wall penetrations to accommodate HVAC and electrical connections. Refer to drawings for additional information.
Form Version 2024.06.27 Page 4 of 10
6.4 Here are the recommendations of ROICC Engineering Branch:
Summary of Observations:
Server Room 1231 houses approximately 50 blade servers and a UPS system, which together generate approximately 127,950 BTU/hr.
The space is currently served by a 10-ton packaged DX TRANE unit. The existing supply and return ductwork is routed externally, and the insulation on this ductwork is deteriorating due to weather exposure.
Inside the server room, there are four sidewall-mounted grilles for air distribution. The supply diffusers are mounted high on the wall, with return grilles located about 24 inches below. This configuration results in short-cycling, limiting effective air circulation and leading to potential overheating of equipment.
Findings:
Air distribution is uneven, causing hot spots.
External ductwork insulation is failing.
The Design shall be as follows:
1. Primary Cooling:
o Install a 10-ton CRAC unit that will be a down flow unit with a open top return. The unit will pressurize the raised floor and disperse air through perforated floor tiles located at the back of the server racks.
2. Ductwork Insulation:
o Replace existing insulation on exterior ductwork with new weather-resistant insulation to prevent continued deterioration and improve thermal efficiency the existing will be resealed to prevent leaks.
3. Interior Air Distribution Improvements:
o The air from the CRAC unit shall be supplied under the raised floor system and discharged to perforated floor tiles located at the back of the servers. The CRAC unit shall have an open return.
6.5 The Contactor must dispose of all existing demolished / removed material off base and must completely clean up the job site daily at the end of each workday.
Form Version 2024.06.27 Page 5 of 10
7. Attachments:
7.1 Location map of Naval Station Norfolk – Building N-26.
7.2 Overall Floor Plan
7.3 Photographs
Form Version 2024.06.27 Page 6 of 10
7.1 Location map of Naval Station Norfolk – Building N-26
LOCATION MAP
NOT TO SCALE
BUILDING N-26
TO MAIN GATE
Form Version 2024.06.27 Page 7 of 10
7.2 Overall Floor Plan
AREA OF WORK
MAIN ENTRY
Form Version 2024.06.27 Page 8 of 10
7.3 Project Photographs:
Photo # 1
EXISTING 10-TON AIR HANDLING UNIT AND THE SUPPLY AND RETURN AIR DUCTWORK
Photo # 2
EXTERIOR SUPPLY AND RETURN AIR DUCTWORK
Form Version 2024.06.27 Page 9 of 10
Photo # 3
INTERIOR CEILING HUNG COOLING UNIT THAT DOES NOT WORK ANY LONGER
Photo # 4
SUPPLY AND RETURN GRILLE (THE SUPPLY IS UP HIGH AND THE RETUN IS LOW)
Form Version 2024.06.27 Page 10 of 10
Photo # 5
WALL BUMPOUT, THERMOSTAT, EMERGENCY LIGHTING AND (2) ABANDONED WALL BRACES
2026-02-03T15:51:42-0500
2026-02-03T15:52:05-0500
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