Attachment 08 DKGV 1148855 Repair HVAC System B-58 (WS).pdf

DKGV 1148855 Repair HVAC System B-58 (WS) (JCM; 12 November 2024)

Statement of Work

DKGV 1148855 Repair HVAC System B-58 (WS)

Joint Base Charleston Weapon Station

18 December 2024

MISSION IMPACT: Perform a complete HVAC System replacement to meet current requirements of the facility.

System shall be balanced and DDC controlled to optimize performance of the HVAC system. The goals are to improve comfort, environmental quality and optimize energy.

MISSION PARTNERS: Naval Munitions Command (NMC)

A. GENERAL: The project involves the design, installation, and commissioning of a multiple-zone variable air volume (VAV) HVAC system, including ductwork, controls AHU and water to air chiller. The work will be performed in an existing occupied office building. Contractor shall provide all tools, qualified labor, materials, equipment, supplies and supervision necessary to engineer, install, and warranty all items in accordance with the following Statement of Work. All project components and materials shall be installed in accordance with the manufacturer’s technical installation instructions and specifications. All work shall be accomplished in accordance with all Federal, State, Local Regulations and the guidelines & requirements as outlined in the base contract to include but not limited to the following:

1. International Building Code

2. International Mechanical Code

3. International Plumbing Code

4. National Electrical Code (NFPA 70)

5. National Fire Code (NFPA 1)

6. Base Architectural Compatibility Guide

7. Unified Federal Criteria (UFC)

8. Unified Facilities Guide Specifications (UFGS)

B. LOCATION: Building 58, Eastside Naval Munitions Command, Joint Base Charleston Weapon Station, Charleston, SC.

C. SCOPE OF WORK: The project requirements include, but are not limited to the following major items of work:

NOTE: In accordance with 29 CFR 1926.1101 (OSHA’s Asbestos Standard for the Construction Industry) Building Owners are required to inform potential contractors bidding for work of the presence, location, type, and amount of asbestos containing building materials (ACBM) that may be impacted by this project scope of work. The following is applicable:

There are no current surveys on file for this building, but historical Asbestos surveys on hand indicate the presence of ACBM in the floor mastic. “Asbestos and LBP surveys will be required”.

ASBESTOS/LEAD PAINT SURVEY/ABATEMENT:

1. For proposal evaluation purposes, the Contractor shall demonstrate the capability to perform commercial building asbestos and lead surveys on future task orders by incorporating the following requirement:

2. The Contractor is required to perform a comprehensive survey to identify asbestos and Lead-Based Paint (LBP) within the building, providing the Government with the original survey report before commencing construction.

Should asbestos be detected within the immediate construction zone and liable to disturbance, it must be safely abated and disposed of in accordance with regulations. Disposal of materials will be conducted at an authorized offsite landfill facility. NOTE: If required, the abatement would be addressed under an addendum/modification to this Task Order.

NOTE: Fully incorporate a narrative in the sample project’s proposal clearly demonstrating how and to what extent this effort would be accomplished if this were an actual project. Ensure all associated costs are clearly identified and incorporated in the proposal. Proposers are not expected to perform actual asbestos or LBP surveys for the purposes of responding to this sample project proposal requirement.

SITE SURVEY AND ASSESSMENT:

1. Contractor shall conduct a detailed site survey to assess the current building structure, load requirements and air distribution needs.

2. Contractor shall identify the placement location for equipment, ducting paths and potential obstacle.

HVAC/ELECTRICAL DESIGN:

1. For proposal evaluation purposes, the Contractor shall demonstrate the capability to provide engineering services on future task orders by incorporating the following design/engineer requirement:

2. Contractor shall develop detailed mechanical design, including system layout, load calculations, equipment sizing, ductwork schematics and HVAC equipment installation point (Chiller, AHU, and VAV’s). The system shall be capable of providing efficient temperature and humidity control across multiple zones in the building, with specific zones able to be independently adjusted based on occupancy and use.

3. Contractor shall ensure the design complies with all applicable codes, standards and energy efficiency requirements.

NOTE: Fully incorporate a narrative in the sample project’s proposal clearly demonstrating how and to what extent this effort would be accomplished if this were an actual project. Ensure all associated costs are clearly identified and incorporated in the proposal. Proposers are not expected to obtain actual engineering services for the purposes of responding to this sample project proposal requirement.

HVAC SYSTEM DEMOLITION:

1. Contractor shall provide selective demolition and disposal of one (1) existing fifteen-ton Trane DX unit, Model # WHS180E4RGA03000, Serial # 132010282D. Demolition shall include all electrical connections, equipment disconnects, and all exterior duct work.

2. Contractor shall provide selective demolition and disposal of two (2) ceiling mounted smoke eaters located in the conference room. Demolition shall include all associated electrical wiring and conduit. Electrical shall be removed back to the panel or nearest junction box.

3. Contractor shall provide selective demolition and disposal of one (1) existing 4’x 8’ relief duct exterior wall louver to include all electrical, pipping, and conduit associated.

4. Contractor shall provide demolition and disposal of the existing supply and return air ductwork throughout the entire building to include return and supply registers, hangers, insulation, and seismic restraint.

SUSPENDED CEILING DEMOLITION:

1. Contractor shall provide selective demolition and disposal of roughly two thousand nine hundred forty (2,940) square feet of existing suspended ceiling, encompassing tegular ceiling tile, ceiling grid, wall molding, suspension wire, and all seismic restrain within the building. NOTE: existing lighting fixture shall be supported as it will remain in place.

CMU WALL DEMOLITION:

1. Contractor shall provide selective demolition and disposal of approximately sixty (60) square feet of existing CMU block to facilitate the removal of one (1) relief air louver and two (2) supply air ducts.

ROOF DEMOLITION:

1. Contractor shall provide selective demolition and disposal of approximately one hundred forty (140) square feet of existing multi-layer built-up roof system over the side air lock doorway. Remove the existing BUR layers, including felt, asphalt, and top surfacing (granular cap sheet).

2. Contractor shall carefully strip and discard all existing flashing, drip edge, insulation and vapor barriers.

3. Contractor shall inspect the deck for any damage, rot, rust or cracks and make minor repairs as necessary to prepare the deck for the new roofing system.

4. Contractor shall prime the deck as needed to ensure proper adhesion of the vapor barrier and first ply layer.

NEW HVAC SYSTEM INSTALLATION:

1. Contractor shall provide and install one (1) new 15 Ton water to air Trane chiller and matched Air handling unit to include all electrical connections, equipment disconnects, conduit, wire, brakers, ducting, duct insulation, duct supports and supply and return chilled water lines to the AHU and VAV boxes. The new equipment shall communicate via the existing Trane building control unit. Contractor shall verify the available voltage configuration prior to ordering replacement unit.

2. Contractor shall provide and install insulation on all chilled water piping to minimize energy loss and prevent condensation.

3. Contractor shall provide and install Sheetmetal ductwork according to design specifications, including any required custom fittings and transitions.

4. Contractor shall provide and install main trunk lines, branch ducts and distribution boxes according to design specifications.

5. Contractor shall provide and install multi zone VAV system, consisting of eight (8) VAV boxes equipped with actuators, sensors, and dampers as required by zone configuration. Contractor shall implement zoning by install VAV boxes in designated zones, ensuring proper connections and adequate support to ductwork.

6. Contractor shall connect each VAV box to the air handling unit via ducting, ensuring proper orientation and air flow.

7. Contractor shall provide and install DDC system for VAV boxes, including thermostats, pressure sensors, and digital control units for integration with the existing Trane building management system.

8. Contractor shall seal all joints and seams to prevent air leaks and ensure maximum system efficiency.

9. Contractor shall insulate all ductwork per thermal requirements and code specifications.

10. Contractor shall provide and install variable frequence drives (VFD’s), pumps, air handlers and other necessary HVAC components.

11. Contractor shall provide and install DDC system for VAV boxes, including thermostats, pressure sensors, and digital control units for integration with the existing Trane building management system.

12. Contractor shall program control logic to enable automated zone temperature adjustments based on occupancy, time schedules, and setpoints.

13. Contractor shall provide and install power feeds for the chiller, air handler, VAV boxes and control systems from the existing electrical panels located in the mechanical room.

14. Contractor shall perform factory authorized equipment start-up on all HVAC equipment installed. The start-up logs will be provided in the project close out documents.

TESTING & COMMISSIONING:

1. Contractor shall perform initial tests on individual components such as chiller, VAV boxes, AHU to verify proper installation.

2. Contractor shall inspect all ductwork for leaks and structural issues and correct issues as necessary.

3. Contractor shall perform air and water side balancing to ensure each zone receives the designed air and water flow.

4. Contractor shall adjust VAV boxes to regulate airflow based on temperature demands and occupancy levels.

5. Contractor shall perform control verification and test each thermostat, sensor, and control actuator to ensure proper response and calibration.

6. Contractor shall verify that the Trane building management system is receiving correct signals from all control points and that it can adjust setting in real-time.

7. Contractor shall conduct operational testing including high-load and low- load situations to confirm that all zones maintain appropriate temperatures. Verify the efficiency and capacity of the water to ai chiller during peak and off-peak conditions.

8. Contractor shall provide four (4) hours of user training on the mechanical and controls system.

NEW SUSPENDED CEILING INSTALLATION:

1. Contractor shall provide and install roughly two thousand nine hundred forty (2,940) square feet of new suspended ceiling, encompassing tegular ceiling tile, ceiling grid, wall molding, suspension wire, and all seismic restrain within the building.

NEW CMU BLOCK IINFILL:

1. Contractor shall provide, install approximately sixty (60) square feet of CMU block infill, new block shall be toothed into the existing block where the relief louver and supply ducts were removed.

2. Contractor shall prepare surfaces according to paint manufactures instructions prior to the application of paint.

3. Contractor shall paint the infilled areas with one (1) coat of primer and one (1) finish coat of exterior paint to match the existing building paint and can be applied by a combination of rollers, brushes and sprayers. Coverage must be complete with no “bleed or show through” of previous paint.

NEW ROOF INSTALLATION:

1. Contractor shall provide and install new vapor barrier material, securing it per manufacturers specifications and sealing all seams, edges, and penetrations.

2. Contractor shall provide and install new insulation panels over the vapor barrier and align to ensure there are no gaps between panels.

3. Contractor shall secure insulation panel in accordance with manufacturers specifications with adhesive and mechanical fasteners and tape and seal joints as required.

4. Contractor shall provide and install the new Base Ply, Intermediate Ply, and Top Ply layers staggering and overlapping each ply to ensure maximum durability.

5. Contractor shall provide an install new metal flashing at all edges, roof penetrations, and any transition areas.

Secure and seal flashings with compatible fasteners and sealants to ensure watertight connections.

6. Contractor shall provide an install new drip edges around the roof perimeter and seal all terminations to prevent water penetration.

GENERAL SITE REQUIREMENTS:

1. Work areas around project site will be occupied by the using activity during work. Caution must be taken to ensure all safety work practices are adhered to while construction work requirements are performed.

2. All work to be performed during normal working hours (0630-1700), Monday-Friday.

3. Caution must be taken in all work areas of the facility to avoid physical or cosmetic damage to existing government property. Any damage to government property resulting from construction procedures shall be the responsibility of the contractor.

D. ENVIRONMENTAL: Refer to the Environmental Management Systems Section (40.0) and Environmental Specification Section (6.4) of the base contract, as well as: The Contractor shall comply with all applicable requirement stated in the Toxic Substances Control Act of 1976. All materials used in the performance of this contract shall be applied in strict accordance with manufacturer’s printed label instructions and all applicable standards. The use of Class I ozone depleting substances, asbestos containing materials, and lead paints are strictly prohibited. Contact the 628 Civil Engineer Squadron Environmental Office at (843)-963-1473 for any asbestos or lead paint related questions.

E. WASTE DISPOSAL/RECYCLING: Refer to the Environmental Specification Section (6.4), and the Hazardous Materials Section (45.0) of the base contract. The contractor shall recycle all recyclable materials resulting from demolition. All waste materials generated by all work under this contract shall be handled, transported, stored, and disposed of off base at no additional cost to the government, by the contractor and or sub-contractors, at any time in accordance with all applicable federal, state, or local laws, ordinances, regulations.

F. SUBMITTALS: Refer to the Submittals, RFI’s & RFV’s Section (23.0) of the base contract. Minimum submittal requirements for this delivery order:

1. Progress/Construction Schedule AF Form 3064

2. HVAC/Electrical Design

3. Asbestos/LBP Survey

4. Asbestos Abatement Permit/Plan

5. Asbestos Certifications

6. SCDHEC Asbestos Waste Management Profile

7. Activity Hazard Analysis(s)

8. AF Form 66

9. HVAC Equipment (VAV’s AHU, Chiller)

10. Duct Insulation

11. Duct (Rigid and Flex)

10. Chiller Water Piping, Fittings, and Associates

11. Dust Control Plan

12. CMU Block and Type S Mortar

13. Roofing System (BUR) Material

14. Fall Protection Plan

15. Electrical Materials (conduit, breakers, disconnects and LOTO)

16. TAB Reports

17. Suspension Ceiling System

18. Seismic Restrains Devices

19. HVAC Controls

20. Equipment Start-Up Reports

21. Closeout Documents (As-Built Drawings, DD Form 1354, Warranty Letters)

G. SAFETY: Refer to the Safety and Health Section (8.0) of the base contract and UFGS 01-35-26. The Contractor shall comply with all OSHA safety regulations, the latest edition of EM-385-1 and 29 CFR 1910, if discrepancies occur the more stringent requirements shall govern. All applicable submittals for various Definable Features of Work (DFOW’s) required by EM-385-1 shall be submitted prior to commencing work.

H. PERMITS & OUTAGES: Refer to the Permits and Outages Section (24) of the base contract.

I. CLOSEOUT DOCUMENTS: Refer to UFGS 01 78 00 and the requirements of the base contract sections listed below:

Warranty (28.3) Contractor’s As Built/Record Drawings (29.0) Real Property Records (28.1) Operation & Maintenance (O&M) Manuals/Data (28.2)

- End Statement of Work -