B1655 Cooling Repairs Statement of Work March-2021.pdf

NAVAL AIR STATION

JOINT RESERVE BASE FORT WORTH

March 2021

STATEMENT OF WORK: PROJECT # DDPM210002

REPLACE TWO (2) DIRECT EXPANSION (DX) AIR CONDITIONING UNITS; WHICH

ARE ONE (1) DX 40-TON A/C UNIT AND ONE (1) DX 10-TON A/C UNIT AT

BUILDING 1655

OVERVIEW:

At this Building 1655 located at NAS Fort Worth JRB Texas there are (two) 2 Air Conditioning (A/C) units, which are: (one) 1 DX 40-ton air conditioning unit and (one) 1 DX 10-ton air conditioning unit that are dilapidated, inoperable and beyond its lifecycle.

The existing systems requires replacement at the East exterior side of Building 1655.

The existing two A/C systems are to be removed/demolished and then the Contractor is to install the new (one) 1 Carrier 40-ton A/C conditioner system and the new (one) 1 Carrier 10-ton A/C conditioner system. The two air cooled condensing units will be provided by the Base Civil Engineer department’s personnel.

SCOPE OF WORK

The Scope of Work (SOW) is stated in terms of general and specific conditions. Any work not specifically stated, but necessary to achieve the goals of the project and/or required by code shall be completed by the Contractor to get both A/C systems to full operations.

The Contractor shall furnish all labor, parts (excluding condenser units to be provided by Government), materials, tools, refrigerant, equipment (if crane involved see 3.1.3), transportation, personnel, supervision and other items and services necessary to replace the inoperable (one) 1 DX 40-ton A/C conditioner unit and inoperable (one) 1 Carrier DX 10-ton A/C conditioner unit located at Building 1655 on the Naval Air Station Joint Reserve Base Fort Worth. The Base Civil Engineer office will provide a new (one) 1 EACH 38APS04060-32120 0 40-ton A/C conditioner unit with security grills/hail guards and (one) 1 EACH 38AUZA12A0A6-0A0A0A 10-ton A/C conditioner unit/with mmi low amb -20DEGF 460V OD MTR, ACC LVD hail guard CAS 120/121 units.

The Contractor shall remove/demolish the existing (one) 1 40-ton A/C conditioner system (photos below) and the (one) 1 10-ton A/C conditioner system (photos below). The Contractor shall provide/replace all expansion valves, piping, insulation and any associated components necessary to achieve full operations, while following manufacturer’s specifications. Additionally, all work done shall be specified by this SOW and in coordination with the Contracting Officer (KO). The Government shall not exercise any supervision or control over the contract delivery providers performing herein.

The Contractor shall provide full operational demonstration to the Base Civil Engineering technicians and any other Air Force parties in attendance of the new A/C conditioning units before acceptance.

All R-22 refrigerant from demolished units must be captured by the Contractor and returned to the government, using Government provided recovery cylinders. The technician shall be an EPA Section 608 certified technician, and shall provide reporting data for each facility including make, model, serial number, and corresponding amount of refrigerant reclaimed from each unit. The recovery cylinders shall be marked with nonpermanent labels to include the same data.

PHOTOS:

Figure 1. 40-Ton A/C Conditioner Unit Corner View

Figure 2. 40-Ton A/C Conditioner Unit Straight View

Figure 3. 40-Ton A/C Conditioner Unit Side View

Figure 4. 40-Ton A/C Conditioner Unit Lines

Figure 5. 10-Ton A/C Conditioner Unit

Figure 6. 10-Ton A/C Conditioner Unit Incoming/Outgoing

Lines

Figure 7. 10-Ton A/C Conditioner Unit Incoming/Outgoing

Lines #2

Figure 8. Power Disconnects to 40-Ton and 10-Ton A/C

Conditioner Units

Figure 9. Building 1655 Mechanical Room - Plan View

SCOPE OF WORK B1655:

The Contractor shall furnish all services necessary to replace (two) 2 air conditioning units at Building 1655.

Building 1655 – Demolition Phase (1 – 10-Ton DX System)

Note: All R-22 refrigerant must be captured by the Contractor and returned to the government

1. Inspect site including air handler system and contact KO if there are any discrepancies that interfere with completion of repair before any work begins.

2. The Contractor shall reclaim all R-22 refrigerant.

3. Protect existing air handler unit components that aren’t getting replaced.

4. The Contractor shall disconnect, remove and discard the existing (one) 1 10-ton condensing unit and associated refrigerant piping, coils, valves, and accessories.

Demolished materials to be removed and discarded off-base, and refrigerant turned over to Government.

Building 1655 – Demolition Phase (1 – 40-Ton DX System)

Note: All R-22 refrigerant must be captured by the Contractor and returned to the government

1. Inspect site including air handler system and contact KO if there are any discrepancies that interfere with completion of repair before any work begins.

2. The Contractor shall reclaim all R-22 refrigerant.

3. Protect existing air handler unit components that aren’t getting replaced.

4. The Contractor shall disconnect, remove and discard the existing (one) 1 40-ton condensing unit and associated refrigerant piping, coils, valves, and accessories.

Demolished materials to be removed and discarded off-base, and refrigerant turned over to Government.

Building 1655 – Installation Phase (1 – 10-Ton DX Air Conditioning System)

1. The Contractor shall install one (1) new 10-Ton DX condenser unit provided by

Government.

2. The Contractor shall provide and install new refrigerant piping and replace R-22 expansion valve with a Contractor provided R-410A expansion valve.

3. The Contractor shall flush the evaporator coil.

4. The Contractor shall provide and install new refrigerant line set, including line supports and brackets.

5. The Contractor shall install new in-line refrigerant dryers.

6. The Contractor shall perform a complete evacuate on the HVAC system ensuring that the systems is free of any air or moisture.

7. The Contractor shall pressure test the system after installation.

8. The Contractor shall provide Puron R-410A refrigerant, charge, and ensure balance and system performance.

9. The Contractor shall insulate all exposed refrigerant piping.

10. The Contractor shall replace AHU temperature sensor and program the unit to fully integrate into facility operations/controls.

11. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as well as ensure the equipment is in proper working condition before completion of project.

12. The Contractor shall prepare an acceptance test report documenting the results of the startup for the day testing was done. Results are to be submitted to the KO before project completion.

Building 1655 – Installation Phase (1 – 40-Ton DX Air Conditioning System)

1. The Contractor shall install one (1) new 40-Ton DX condenser unit provided by Government per manufacturer’s instruction, including electrical power.

2. The Contractor shall provide and install new refrigerant piping and replace R-22 expansion valve with R-410A expansion valve.

3. The Contractor shall flush the evaporator coil.

4. The Contractor shall provide and install new refrigerant line set, including line supports and brackets.

5. The Contractor shall install new in-line refrigerant dryers.

6. Install two new pump down solenoids, replacing old ones.

7. The Contractor shall perform a complete evacuate on the HVAC system ensuring that the systems is free of any air or moisture.

8. The Contractor shall pressure test the system after installation.

9. The Contractor shall provide Puron R-410A refrigerant, charge, and ensure balance and system performance.

10. The Contractor shall insulate all exposed refrigerant piping.

11. The Contractor shall replace the AHU temperature sensor and program the unit to fully integrate into facility operations/controls.

12. The Contractor shall perform startup and test of newly installed unit to ensure all new and existing electrical is safely connected to the desired equipment per code as well as ensure the equipment is in proper working condition before completion of project.

13. The Contractor shall prepare an acceptance test report documenting the results of the startup for the day testing was done. Results are to be submitted to the KO before project completion.

Note: Prior to installation, the new expansion valves, and all related appurtenances and material selections shall be approved by the KO.

PART I - GENERAL

1.1. REFERENCE PUBLICATIONS:

US GOVERNMENT/US AIR FORCE PUBLICATIONS: US Government/US Air Force publications can be found via internet at http://www.e-publishing.af.mil/. Some suggested publications would include:

1.1.1. 29 CFR (PART 1910), Occupational Safety and Health Standards

1.1.2. 29 CFR (PART 1926), Safety and Health Regulations for Construction

1.1.3. 40 CFR (PART 82), Protection of Stratospheric Ozone

1.1.4. AFMAN 91-203, Air Force Occupational Safety, Fire, and Health Standards, 11 Dec 2018

1.2 NATIONAL INSTITUTE OF BUILDING SCIENCES (NIBS): The NIBS operates a website called the Whole Building Design Guide (WBDG) and it can be found via internet at http://www.wbdg.org/. Some suggested Unified Facilities Criteria’s (UFCs) would include:

1.2.1. UFC 3-410-01 Heating, Ventilating, and Air Conditioning (HVAC) Systems, Change 6, 02 Mar 2020

1.2.2. UFC 3-550-01 Exterior Electrical Power Distribution, Change 2, 13 Mar 2019

PART II – PRODUCTS

2.1. MATERIALS:

2.1.1. The Contractor’s work shall conform to the contract specifications and the best practices of the trades involved in this type work. All materials used in the work shall be free of defects in workmanship or finish, and shall be installed in accordance with the manufacturer’s specifications.

2.1.2. Contractor Furnished Materials: The Contractor furnished materials shall include all associated equipment and appurtenances required for performing the work in accordance with the equipment manufacturer’s literature.

2.1.3. Government Furnished Materials: The Government shall provide (one) 1 EACH 38APS04060-32120 0 40-ton A/C conditioner unit with security grills/hail guards and (one) 1 EACH 38AUZA12A0A6-0A0A0A 10-ton A/C conditioner unit/with mmi low amb -20DEGF 460V OD MTR, ACC LVD hail guard CAS 120/121

PART III – EXECUTION

3.1. WORK REQUIREMENTS:

3.1.1. Scheduling and Coordination: Prior to work commencement, the Contractor shall ensure that he/she is complying with the approved schedule, that work commences in accordance with the issued Notice to Proceed, and that work is coordinated with the assigned KO. The Contractor shall further determine that all required notices have been given and permits obtained.

3.1.2. All work performed within airfield proximity shall be submitted for approval through Navy Public Works (NPW).

3.1.3 All use of cranes on the installation must be submitted through NPW for authorization and approval.

3.1.4. Scheduling and Sequence of Work: The work shall be performed in such a manner as to minimize interruption of the normal duty day of Government activity.

Certain areas of the facility will be vacated as necessary in order for required work to be performed. Prior to commencement of work, the Contractor shall meet with the KO so that the planned sequence of work and/or schedule may be reviewed and approved.

3.1.5. Interruption of Utilities Services: Interruptions shall be kept to a minimum and may only occur at such times and duration as approved by the KO. All utility interruptions shall be reviewed and accepted by the KO before approval is provided.

Currently, NAS FW JRB Public Works requires a fourteen (14) day prior notification for a Utilities (Water, Gas, and Minor Power) shutdown. Major Power Outages require a twenty-eight (28) day prior notification.

3.1.6. Material(s), equipment, tools, and personnel shall be scheduled on-site in a timely manner as to avoid work delays. Material shall be inspected to ensure they are in compliance with specifications and are free from defects and damage.

3.1.7. Measurements: The Contractor shall field verify all aspects of the project.

The Government shall not be responsible for Contractor oversight.

3.1.8. Existing Work: The Contractor shall take all necessary precautions to protect surrounding areas and Government property from damage. The Government shall not be responsible for any damages caused by the Contractor. The Contractor shall be responsible for repairing or replacing any Government property that is damaged during the performance of work. Failure to do so shall result in the Government withholding contract funds in order to mitigate damage caused.

3.1.9. Facilities: The Contractor shall protect all utilities as well as electrical and mechanical services. Where removal of existing utilities and pavement is specified or indicated, provide approved barricades, temporary covering of exposed areas, and temporary services or connections for electrical and mechanical utilities.

3.1.10. Dust and Debris Control: The Contractor shall limit the spread of dust and debris to the surrounding buildings as well as avoid the creation of a nuisance or hazard in the surrounding area. Non-hazardous debris resulting from the work being performed shall be cleaned up daily.

3.2. PERFORMANCE:

3.2.1. Workmanship: The Contractor is responsible for quality control and shall establish and maintain an effective quality control system. The Government will hold the contractor responsible for the quality of workmanship on the job. Skilled personnel shall execute in a careful, neat, and proficient manner in accordance with accepted trade practices and prevailing industry standards. All work shall be executed in accordance with OSHA standards, and specifically 29 CFR 1910 and 29 CFR 1926.

All work shall comply with all current applicable Federal, State and local regulations/codes/laws, and with all other applicable laws and regulations governing development, design, and construction at the site, whereby the most stringent of the applicable regulations/codes/laws are applicable.

3.2.2. As used herein, “replace” means provide new materials to replace existing or missing materials.

3.2.3. Unforeseen Major Repairs: Should deteriorated materials of a major nature be uncovered in the course of the work, it shall be brought to the attention of the KO.

Any work outside the project scope shall not be undertaken without direction the KO, in writing.

Existing Work: The Contractor shall be responsible for repairing/replacing/restoring any area or items damaged as a result of the performance of this work. The Contractor shall take all necessary precautions to protect surrounding areas and Government property from damage. The Government shall not be responsible for any damages caused by the contractor.

3.3. REQUIRED FINAL SUBMITTALS:

3.3.1. Per UFGS 01 78 00, Section 1.7.1, the Contractor shall “assemble approved information in a binder and turn over to the Government upon acceptance of the work.”

The Government will also accept electronic versions of the warranty binder. Binder or CD label should include Building Number, Contract Number, and Contract Name.

Binder or CD shall contain the following items:

3.3.1.1. Name of the item(s)

3.3.1.2. Model and serial numbers

3.3.1.3. Location where installed

3.3.1.4. Name and phone numbers of manufacturers or suppliers

3.3.1.5. Names, addresses, and telephone numbers of sources of spare parts

3.3.1.6. Warranties and terms of warranty. Include one-year overall warranty of construction, including the starting date of warranty of construction. Items which have extended warranties must be indicated with separate warranty expiration dates.

3.3.1.7. Cross-reference to warranty certificates as applicable

3.3.1.8. Starting point and duration of warranty period

3.3.1.9. Summary of maintenance procedures required to continue the warranty in force.

3.3.1.10. Cross-reference to specific pertinent Operation and Maintenance manuals.

3.3.1.11. Organization, names and phone numbers of persons to call for warranty service.

3.3.1.12. Typical response time and repair time expected for various warranted equipment.

3.3.1.13. All Operation & Maintenance manuals

3.3.1.14. All preventative maintenance plans

PART IV: OTHER REQUIREMENTS

4.1. SCHEDULE:

The Contractor shall provide a Construction Schedule for KO approval. Work will be accomplished during normal Base operating hours, approximately 0730-1630 hours, Monday-Friday. No work will be scheduled on weekends without prior written approval by the KO.

4.2. IDENTIFICATION OF EMPLOYEES:

The Contractor shall be responsible for furnishing to each employee, and for requiring each employee engaged on the Work to display, identification as approved and directed by the KO. Prescribed identification shall immediately be delivered to the KO upon release of any employee. All Contractor and Sub-Contractor personnel shall wear identifying markings on hard hats clearly identifying the Company for whom the employee works.

4.3. JOB SITE TOOLS AND EQUIPMENT:

All hand tools and equipment shall be maintained in good working order and properly stored when not in use. Construction attire shall be in accordance with applicable OSHA regulations.

4.4. SANITATION:

Government toilet facilities shall not be available to Contractor personnel. The Contractor shall provide portable toilets at the job site for Contractor personnel.

4.5. CLEANUP:

The Contractor is responsible for a thorough DAILY clean-up and removal of any debris (waste, materials, packaging material, and the like) created during the performance of his work. All construction waste shall be stored in appropriate size dumpsters, and covered in an effort to keep contents inside. Cleanup of the Work Site shall include the construction site and any other adjacent areas that have been affected. Any dirt or mud which is tracked on to any Base street, parking area, sidewalk, patio, or driveway shall be cleaned away daily. This clean-up procedure does not apply to the generated universal waste

4.6. OCCUPATIONAL SAFETY:

The Contractor shall be subject to No Notice Inspections under Occupational Safety and Health Act (OSHA) Program by Inspectors of the Department of Labor.

4.7. GENERATED REFUSE:

The Contractor shall take positive action to prevent work generated refuse from entering the sewer system. The Contractor shall use contractor provided approved waste containers. All refuse and waste material shall be hauled in trucks with tight fitting beds and covers to prevent spillage on roadways. The Construction Site shall be kept neat, orderly, and safe at all times.

4.8. RECYCLABLE MATERIAL:

All removed metals are to be recycled by the Contractor at the NAS Fort Worth JRB Recycling Center or at an off-base recycling center. The amount of recyclable material and solid waste from demolition operations shall be documented on a Waste Tracker Form and submitted to the KO at the Project Closeout.

4.9. CONTRACTOR FURNISHED MATERIALS:

Contractor Furnished Materials. The Contractor shall submit a detailed list of the manufacturer’s data for all Contractor Furnished Materials to the KO for approval. The KO may request Drawings and Descriptions indicating the quality and fitness for the intended application.

4.10. SCHEDULE OF SUBMITTALS:

The Contractor shall provide a Submittal Schedule for approval to the KO prior to material procurement.

4.11. SITE VISITATION:

Prior to submitting proposals, it is encouraged that prospective Contractors conduct a site visit in order to get an understanding as to the nature of the project site, details, character, and extent of work to be accomplished. The Contractor shall be responsible for the verification of all SOW details, measurements, drawing specification, dimensions and etc., prior to submission of their proposal, ordering of materials, and execution of work. Failure to attend a site visit shall not relieve the Contractor of his/her responsibility of being knowledgeable of those conditions that can only be readily observed by visiting the site.

Site visitation may be arranged by the KO.

4.12. TIME OF COMPLETION:

The Contractor shall have one hundred and twenty (60) calendar days to perform all work after signing the Notice to Proceed (NTP).