Attach 2 - SOW FGWB 21-0007 Repair HVAC B550_1.pdf

Attach 2 Aug 7 2025

STATEMENT OF WORK

FGWB 21-0007

HVAC Repair, B550

Building 550 Dobbins ARB, GA

1.1. PROJECT DESCRIPTION

1.1.1. Location

The project is located at Dobbins Air Reserve Base, Georgia. Project site is located at Building 550.

1.1.2. Period of Performance

The period of performance is 425 Calendar Days. This includes chiller lead time.

1.1.3. Project Overall Description

At Building 550, the Contractor will replace the existing plunger type VAV’s, Reconfigure AHU3 for hydronic cooling, make misc. repairs throughout the facility. The facility currently has Distech Controls, any other controls must be pre-approved and must include all the software and licensing required to reprogram, recommission and replace. All controls must be unbranded with non-expiring license. All controls work must be fully integrated into Dobbins UMCS with graphics and alarms. Coordination with the facility will be required to minimize the impact on the user. Work shall be completed in one area at a time and in a manner as to minimize the down time. Site visit will be required to determine installation location and type of new equipment. All work performed must meet local, state, and federal codes including but not limited to all applicable Department of Air Force Requirements (DAFMAN and DAFI), UFC and Dobbins Design Guide requirements. The contractor shall be capable of addressing and interpreting all aspects of Dobbins Design Guide, and United Facilities Criteria (UFC).

❖ SPECIFIC SCOPE

AHU1&2

• Replace the outside air damper for AHU1&2. The new damper must meet the requirements of the original design. See attached drawings for details.

Attachment 2 FA670325B0005

• Install a new modulating actuator on AHU1&2 outside air damper. The new actuator must be spring return type, provide feedback, connected to the existing HVAC control system and programmed to provide a free cooling mode in conjunction with the new outside air temperature and humidity sensors.

• Install a new outside air humidity and outside air temperature sensor to AHU1&2. The new sensors will need to be connected to the existing HVAC control system and programmed to operate free cooling mode.

• Replace AHU2 supply fan motor with a 15hp to match AHU1. The existing sheaves for the motor and the fan will need to be replaced to match AHU1 as well. The unit currently installed doesn’t meet the original design.

• Replace AHU2 supply fan VFD to match the new 15hp motor. The new VFD must be programmed to operate as the original and be fully integrated into the existing controls.

AHU3

• Replace AHU3 DX cooling coil with a chilled water coil that meets the existing coil specifications. The new chilled water coil must have a strainer, balancing valve, isolation valves and a drain installed.

• Demo the old DX condensing unit. The contractor is responsible for meeting all local, state, and federal codes for the disposal of refrigerant and contaminated oil. The contractor must provide documentation of disposal.

• The contractor is responsible for removing and replacing any ceiling grid or tiles necessary in the completion of this project.

• Install new 2.5” black iron chilled water piping from AHU3 to connect to existing chilled water loop. The piping must contain entering and leaving thermostats and entering and leaving pressure gauges at AHU3. All thermostats must be installed in wells and pressure gauges must have isolation valves. The pipe work must be sized and installed in a manner to meet the new chilled water coil requirements (AHU3). The pipe work must be installed in a manner to achieve a primary secondary loop configuration. All pipe work must be insulated and treated with chemical approved by Dobbins Hazmart.

• Install 2 new chilled water pumps to meet the new requirements of the chilled water loop.

The new chilled water pumps must be connected to the existing building controls and be programmed to operate in a lead/lag configuration. The new pumps must have balancing valves, isolation valves and strainers. The isolation valves must be installed in a manner to clean the strainers with minimal loss of water.

• Install a new modulating 3-way valve at AHU3 chilled water coil. The new 3-way valve will need to be programmed to replace the cooling command of the DX unit. The 3-way valve must have isolation valves installed in a manner to replace the valve with minimal loss of water.

• Repair damaged AHU3 duct work up to 10% of existing ductwork and perform a duct air leakage test (DALT).

• Replace all AHU3 duct work insulation including VAV’s.

• Replace 18 plunger type VAV’s with damper type. All perimeter VAV’s are to have reheating coils.

• Replace all HVAC controls for AHU3 VAV’s. All controls need to comply with Dobbins Design Guide.

• Replace all hot water valves and actuators for AHU3 VAV reheating coils.

• Install a new electric meter, wire, and integrate to the existing UMCS for remote monitoring.

The new meter must be on the Dobbins approved meter list and be installed according to the Dobbins Design Guide.

• Install new gas and water meters with pulse counters and connect to the new electric meter.

All wiring and programming must meet Dobbin’s design guide.

• The contractor must perform a TAB and PVT to confirm all work was completed to the provided specifications.

1.2 SUBMITTALS

Submittals shall be submitted in accordance with Schedule below

Contract number: Project Name: HVAC Repair, B550

Submittal

Item Description Date Sent

Date Returned

Status Date

Resubmitted

S-001 Safety Plan

S-002 Controls Detail

S-002 Piping

S-003 Coil Detail

S-004 Wire Detail

S-005 Damper Detail

S-006 Insulation detail

S-007 DALT report

S-008 T&B report

S-009 PVT Report

S-010 Work Schedule

S-011 Warranty Management Plan

S-012 As-Builts

NOTE: The contractor shall obtain Government approval of all materials and equipment requiring submittals prior to bringing these materials and equipment onto Dobbins ARB for installation and incorporation into the work.

1.2.1 Administrative or Close-out Submittal

• Construction Phasing (ref: para 3.2.1)

• Daily Progress reports to Contracting Officer within 2 hours of shift completion.

• Quality Control Plan, (ref: para 3.17.6)

1.3 GOVERNMENT INSPECTOR

The Base Civil Engineer, or his authorized representative, is designated as the representative of the Contracting Officer for the purpose of technical surveillance of workmanship and inspection of materials for work being performed under this contract. This clause does not authorize anyone other than the Contracting Officer to commit the Government to changes in the terms of the contract.

1.4 ORAL STATEMENTS

No oral statement by any government official shall in any manner or degrees modify or otherwise affect the terms of this contract.

1.5 NO GOVERNMENT WAIVER

The failure of the Government in any one or more instances to insist upon strict performance to any of the terms of this contract or to exercise any option herein conferred will not be construed as a waiver or relinquishment to any extent of the right to assert or rely upon such terms or option on any future occasion.

PART 2 PRODUCTS (Not Applicable)

PART 3 EXECUTION

3.1 BASE REGULATIONS

The Contractor and his employees and subcontractor shall become familiar with and obey all base regulations, including fire, traffic, airfield, safety, environmental, and security regulations. Regulations are available upon request. All personnel employed on subject contract shall keep within the limits of the work and avenues of ingress and egress. Do not enter any restricted areas unless previously cleared for such entry. The Contractor's equipment shall be conspicuously marked for identification.

3.2 WORK SCHEDULE

The Contractor shall schedule his work to cause the least amount of interference with base operations. Work schedules shall be subject to the approval of the Contracting Officer. Under no circumstances shall fire water system be out of service for more than 5 calendar days. Permission to interrupt any base roads and/or utility service shall be requested in writing a minimum of 10 calendar days prior to the desired date of interruption.

Interruption shall not take place without specific approval from the Contracting Officer.

3.2.1 Construction phasing

Thirty (30) calendar days prior to commencing work, provide to the Contracting Officer, for approval, a plan, which indicates the timeline of start to completion of each construction phase. A pre-construction meeting is required before a Notice to Proceed is granted.

3.3 WORK HOURS

The normal hours of work for the performance of this contract will be from 7:30 AM to 3:30 PM except as otherwise expressly provided in this contract. The workdays will be Monday through Friday, with Federal holidays excluded. Alternate work hours require written permission of the Contracting Officer. The contractor must submit a written request for permission to work to the Contracting Officer at least 2 working days in advance of the date when the contractor desires to deviate from the normal hours and days. Permission to deviate will be predicated on complete justification for the request after due consideration to a larger work force and more equipment during normal hours, and providing the contractor defrays the additional costs to the Government including, but not limited to, inspection computed in accordance with existing Government regulations. If permission is granted by the Contracting Officer, written authority will be furnished to the contractor prior to the date the contractor desires to deviate from the normal hours or days. The Contracting Officer may also direct performance as authorized by the General Provisions by reference clause entitled “Schedule for Construction Contract.”

3.4 OPERATIONS ON THE AIRFIELD (Not Applicable)

3.5 EXISTING WORK

The removal or altering in any way of existing work shall be carried on in such a manner as to prevent personal injury or damage to any portions of the existing work that remains.

3.6 SANITATION

Adequate sanitary conveniences of a type approved for use by persons employed on the work shall be provided.

Sanitary conveniences shall be properly secluded from public observation and maintained by the Contractor in such a manner as required or approved by the Contracting Officer. Always maintain these conveniences without nuisance. Upon completion of the work, the contractor shall remove the conveniences from the premises, leaving the premises clean and free from nuisance.

3.7 UTILITIES

All reasonable quantities of government provided utilities shall be made available to the contractor without charge. Any temporary telephone service shall be requested by the contractor from the local Telephone Company providing service to Dobbins ARB. The contractor shall not tamper with, connect or access any Government communication facility, equipment or cable without express written consent from the Contracting Officer. Any temporary connections or lines that may be required shall be installed, maintained, and removed by the Contractor at his expense and in a manner satisfactory to the Contracting Officer. Contractor shall remove all temporary connections and lines prior to final acceptance of the construction.

3.8 UTILITY SERVICE INTERRUPTION

The Government shall not be held responsible for interruptions of utility services and shall not be liable for Contractor delays, damages, or increased costs occasioned by any such interruption of services.

3.9 OPTIONAL REQUIREMENTS

Where a choice of materials or methods, or both, is permitted in this contract, the Contractor will be given the right to exercise the option unless otherwise required by the specification or plans.

3.10 MATERIAL APPROVAL SUBMITTAL PREPARATION

"Material and Workmanship" shall be accomplished on and in accordance with the instructions to AF Form 3000, Material Approval Submittal. Material Approval Submittals shall contain complete information for the product proposed. The information shall be in enough detail to allow the Government to determine acceptability.

Information to be provided includes but is not limited to a description of all salient features of the product, descriptive literature and manufacturer's cut sheet (if available), plus an explanation as to precisely why and how the material or item submitted meets or exceeds all required functions, performance and quality specifications.

3.11 MATERIAL DISPOSITION

3.11.1 Material/Equipment Title

Title to materials and equipment to be demolished, except Government salvage and historical items, is vested in the Contractor upon receipt of notice to proceed. The Government will not be responsible for the condition, loss or damage to such property after notice to proceed.

3.11.2 Contractor Salvage

Contractor shall salvage items and materials to the maximum extent possible. Material salvaged for the Contractor shall be stored as approved by the Contracting Officer and removed from Government property before completion of the contract. The contractor shall not sell salvaged material on the site.

3.12 CLEAN-UP

Remove and transport debris in a manner that prevents spillage on streets or adjacent areas. Local regulations regarding hauling and disposal shall apply. The contractor shall maintain a clean and orderly work site.

3.13 SAFETY REQUIREMENTS

The contractor shall initiate and maintain programs that comply with the provisions of 29 CFR parts 1926 and 1910 of the Occupational Safety and Health Standards. These programs shall include the education and training of employees and subcontractors’ personnel in the recognition, avoidance, and prevention of unsafe conditions and practices.

3.14 FIRE PROTECTION

The contractor shall be responsible for furnishing adequate and proper fire protection during all phases of work on site. Contact the base Fire Department in the event of emergency.

3.15 FACILITIES AND SERVICES

The contractor is responsible for storage of all materials. Storage areas shall be shown on the site plan and approved by the Contracting Officer.

3.16 RESTRICTIONS

3.16.1 Radio Transmitter Restrictions

The contractor shall conform to the restrictions and procedures for the use of radio transmitting equipment, as directed. Two transmitters shall be provided by the government to the contractor for use during construction.

3.16.2 Materials Burning

Burning of trash, timber and any other debris on government property is not permitted.

3.17 REQUIRED CONTRACTOR ACTIONS

3.17.1 Base Permits

Obtain these pursuant to paragraph 3.1 of this specification. Permits are required for, but are not necessarily limited to, welding, and digging.

3.17.1.1 Government Digging Permits

The requirement for digging or excavation permits (AF Form 103) shall be applicable for Government-owned utilities such as water, gas, electrical, sewer, fiber optics, telephone cable and communication cables for radar, weather and navigational aids cable.

3.17.1.1.1 Procedures for Government Digging Permits

Contractor shall not dig anywhere on Dobbins ARB without a valid digging permit. Contractor shall notify the Contracting Officer in writing to request a digging permit.

Contractor shall mark the area on site where digging is to occur. This shall be done the same day the dig permit is requested. Government has 14 calendar days to issue an initial digging permit.

Contractor shall maintain all markings during construction performance period.

Contractor will provide AFM completed and signed copy of AF Form 103, Dig Permit, prior to digging.

Once a digging permit is issued, the contractor must hand dig and locate all marked utilities within 5 feet of the area to be worked on. Contractor shall fill all holes prior to project completion.

If, during the life of the digging permit, utility markings are removed by the contractor or his subcontractor the contractor shall be responsible for replacing all markings.

3.17.1.2 UPC Digging Permits

The procedures set forth for Government-owned utilities shall not apply to utilities which are governed by the Utilities Protection Center (UPC) under the auspices of the State of Georgia. UPC utilities on Dobbins ARB include television cable, telephone cables, data cables, etc. Procedures for utilities governed by the UPC shall be followed in accordance with Georgia Utility Facility Protection Act (GUFPA). The contractor is required to obtain a UPC digging permit prior to digging on Dobbins ARB. The government is not responsible for issuing or monitoring UPC digging permits.

3.17.1.3 Utility Damage

The Contractor must immediately notify the Government technical representative and UPC in the event that utility damage occurs. If damage to utilities is due to contractor non-compliance with permit instructions or contract requirements, repairs required shall be at the contractor’s expense. Fiber optic cables, which cannot be repaired to meet the minimum allowable decibels, will be replaced at the contractor’s expense.

3.17.1.4 Welding Permits

Obtain welding permits on a daily basis from the Base Fire Department.

3.17.2 Severe Weather Protection

In the event of severe weather, the contractor shall take precautions to minimize any danger to persons and protect the work and any nearby Government property. Precautions shall include, but are not limited to, closing openings; removing loose materials, tools and equipment from exposed locations; and removing or securing scaffolding and other temporary work.

3.17.3 Clean Tire Policy

Dobbins ARB has a clean tire policy at work sites. The purpose of this policy is to reduce or eliminate the transport of mud from the work area onto public rights-of-way by motor vehicles leaving the site or by runoff from the site. Clean and remove mud from the wheels of vehicles prior to entrance to public rights-of-way. The site exit shall be maintained in order to prevent tracking or flow of mud onto public rights-of-way. Immediately remove all materials spilled, dropped, washed, or tracked from any vehicle or site onto any roadway or into any storm drain. Compliance with the clean tire policy, by Contractor and Sub-contractor personnel, shall be the sole responsibility of the Contractor.

3.17.4 Erosion and Sediment Control

Take positive steps to minimize siltation and erosion during the work. Comply with the requirements of Section 01560, drawings, and all other related specification sections.

3.17.5 Environmental Requirements

The Contractor and all work to be performed on Dobbins ARB shall comply with the requirements of Section 01560.

3.17.6 Quality Control Plan

The contractor shall be required to institute a comprehensive Quality Control Program in order to assure himself and the Government that all materials and workmanship are in strict accordance with the provisions of the specifications. Within 10 calendar days after receipt of Notice to Proceed, the contractor shall submit his Quality Control Program Plan to the Contracting Officer. The plan shall contain, at a minimum, identification of procedures for quality control, the type and model of major pieces of equipment to be used on-the-job, ordering procedures for materials, and procedures to ensure adequate progress.

3.17.7 Hazardous Spill Reporting

The contractor shall report any spill of oil or hazardous substances to the Fire Department service desk at Ext. 911 from a government phone, or (678) 655-4840 from a commercial phone (24 hours per day, 7 days per week). The contractor shall take every reasonable precaution to prevent the spillage of oil or other hazardous substances.

3.18 DD FORM 1354

Contractor completion of a DD1354 Package is required for this project. Copies of the DD1354 form and its instructions are included in the project manual. Electronic copies will be available from the COR. Follow the instructions given for executing the DD1354 and coordinate its submission with the COR.