SCOPE OF WORK –

CLEAN AIR HANDLING UNITS

Naval Medical Center, Camp Lejeune

4 August 2026

1.0 Background:. Each AHU has multiple duct connections, including supply air, return air, and outdoor air. Refer to the attached AHUs to be cleaned.

The fan assemblies consist of rigid housing and wheels designed for high-volume air movement, constructed of durable materials intended to withstand demanding operating conditions while minimizing noise and vibration.

1.1 Purpose: The purpose of this Scope of Work is to define the responsibilities and scheduling requirements for cleaning twenty-one (21) HVAC Air Handling Units within buildings 15, 326, DD48, G770, NH180 and NH200 at MCB Camp Lejeune.

Work Plan - Contractor shall prepare and submit a Draft Project Work Plan which will include: 1) project organization, personnel, and management, 2) technical approach, 3) coordination procedures, 4) activity schedule, 5) quality assurance and quality control procedures, and 6) a description of the primary activities that will contribute to the successful execution. Contractor will incorporate comments from NAVFAC the NAVMEDCEN into the Work Plan and submit the Final Work Plan within 10 days of receiving comments.

SSHP/ HASP - The Contractor shall develop a Site-specific Safety and Health Plan/ Health and Safety Plan (SSHP/ HASP) in accordance with 29 CFR

1910.120 and EM385-1-1. The plan shall define emergency procedures, discuss any site hazards that could be encountered during execution of this performance work statement, address accident prevention, and present appropriate action levels for potential contaminants to be encountered. When completing the Safety Plan follow the guidelines and checklist in the most recent revision of the EM- 385-1. The Contractor shall submit the draft SSHP for review within 30 days of the award. Submittal will include the checklist and the plan. The Contractor shall not conduct any on-site activities until all review comments are resolved and the final SSHP is approved and finalized.

1.2 In-Progress Review Meetings. The Contractor shall coordinate weekly IPR meetings with NAVFAC, MCB Camp Lejeune and DHA-FE personnel.

Objectives of the meetings are to discuss findings, review comments, address issues pertinent to the contract activities and report status of deliverables and provide a four-week look ahead schedule.

1.3 Confirmation Notices. The Contractor shall provide a record of all discussions, verbal directions, telephone conversations, and other communications participated in by the Contractor and/or his representatives on matters related to this Task Order (TO).

1.4 The Contractor shall prepare minutes of all meetings connected with this Task Order and provide copies to the PM and COR within 7 days of the meeting in the form of a Confirmation Notice.

2.0 General Requirements – HVAC AHU System Cleaning

All work shall be phased. Prior to any work starting, contractor shall coordinate with Medical Facility leadership team and HVAC Mechanical Staff to prioritize AHU and develop phasing plan.

2.1 AHU Cleaning

Buildings 15, 326, DD48, G770, NH180 and NH200 HVAC systems contain twenty-one air handling units (AHUs), BLD 15 AHUs 1-8, BLD 326 AHUs 1-7, BLD DD48 AHU-2, BLD G770 AHU-1, NH180 AHUs 1 & 2 and BLD NH200 AHUs 1 & 2. This Scope of Work, in conjunction with the NADCA ACR-2025 standard, defines the primary cleaning requirements.

UFGS 23 01 30.41 is referenced for supplemental technical guidance. In the event of a conflict between the UFGS and this SOW, the requirements of this SOW shall take precedence.

The Contractor shall clean, at a minimum, the following components:

a) Cooling and heating coils, supply fans, return fans, filter frames, motors, condensate drain pans, dampers, duct connection canvases, internal supports, and casings. All interior surfaces of the AHU shall be free of visible dirt, dust, microbial growth, grease and oil.

b) Outdoor air ductwork associated with the AHUs, including dampers, access doors, and mixing box.

c) Comb out bent coil fins.

d) Drain piping connected to AHU condensate pans.

e) Cleaning will include removal of the interior fan housing, cleaning the fan and housing, treating all rusted areas with a rust inhibitor and re-installation of the fan housing.

f) Vacuum all interior sound attenuation and/or insultation material. Seal the material with coating product to prevent breakdown, microbial growth, and/or entry into air stream.

g) Wipe clean and flex transition material.

h) Building 15 AHU-1through 8 prep & apply rust inhibitor to all rusted interior and exterior areas.

a. The Government understands that the removal of coils in Building 15 for drain pan replacement carries inherent risk due to potential pre-existing corrosion. The contractor shall exercise due care. If, upon initial attempt, it is determined that a coil cannot be removed without a high probability of damage, the contractor shall stop, document the condition with photos, and notify the COR via an RFI. A joint inspection will be performed to determine the path forward (e.g., repair or change order for replacement).

i) Building 15 AHU-2 install new disconnect.

j) Building 15 AHU-5 replace existing disconnect.

k) Building 326 AHU-1 through 6 prep & apply rust inhibitor to cooling coil drain pans.

l) Building DD48 AhU-2 replace cooling coil & clean ERU.

m) Building G770 AHU-1 replace OA damper.

n) Building NH180 AHU-1 & 2 replace OA dampers and replace cooling coils.

Note: Items a-g apply to all air handlers within this scope of work.

Cleaning methods may include vacuuming, brushing, wet chemical cleaning, and other NADCA-approved techniques. Mechanical power brushing or equivalent methods may be used to dislodge adhered particulate matter, provided the most stringent applicable criteria are met and damage to the integrity of the systems is not incurred.

Chemical Use

• Provide safety data sheets (SDS) to Infection Control and Safety Manager for all antimicrobials, detergents, or chemicals (e.g., FOSTERS 40-20, SPORICIDIN) for approval.

• Follow manufacturer instructions for use, including dilution, PPE, and disposal.

Pre-Mobilization / Site Preparation

• Conduct pre-work inspection to verify areas of access, safety hazards, utilities, and cleaning sequence.

• Provide temporary cooling to affected areas to ensure total air changes an hour, maintain pressurization, temperature between 72-75 degrees, relative humidity between 30-60 % and required air filtration based on room usage code and category code in appendix B of UFC 4-510-01. If air quality is not met the contractor will be notified and the contractor will be required to respond within 1 hour and work on the issue until air quality is met.

• Review floor plans and confirm exclusion zones.

• Complete ICRA 2.0 Infection Control Construction notice to proceed form and route for approval.

• Notify Facilities and Infection Control prior to starting work on an AHU

• Install containment barriers as required by ICRA and containment barrier between AHU and supply duct is required.

• Install Sticky mats at entrance to the mechanical room.

• Set up negative pressure in Mechanical room and have Facilities and Infection Control validate, prior to beginning any work. Notify NAVFAC COR so they can coordinate with the Hospital.

• Lockout/Tagout electrical panels in accordance with EM385-1-1/OSHA CFR and hospital facility safety policy.

Equipment and Materials Setup

• Mobilize HEPA vacuum units, microfiber cleaning tools, and EPA-registered disinfectants.

• Prepare cleaning solution stations with fresh water and measured detergent/disinfectant mix per manufacturer product label instructions and utilize protective safety gear in accordance with SDS.

• Nonporous/smooth and cleanable containers (with a hard lid) must be used to transport trash and debris from the construction areas. These containers must be damp-wiped cleaned and free of visible dust/debris before leaving the contained work area.

• Cleaning will include removal of supply fan impeller, cleaning of the interior fan housing, installation of cleaned impeller, shaft, and bearing, and balancing of system after re-assembly (demonstrate the air handler can deliver original rated air flow). Clean both sides of coils, all interior AHU surfaces, intake and return air dampers/grills, and fan assemblies.

• Replace all air filters, bag filters if applicable, with new after cleaning of AHU system.

Personal Protective Equipment (PPE)

• All personnel shall wear appropriate PPE.

• Workers must wear shoe covers prior to entry into the work area. Shoe covers must be changed prior to exiting the anteroom to the occupied space (non-work area). Damaged shoe covers must be immediately changed.

• Vacuum clothing if dusty before leaving room.

Gross Debris Removal

• Remove and dispose of loose debris, paper, and miscellaneous trash in AHU and mechanical rooms prior to demobilization.

Post cleaning demobilization/ AHU start up

• Notify NAVFAC COR so they can coordinate with Hospital Facilities and Infection Control when cleaning work has been completed before removing any barriers and starting up the AHU.

• Negative pressure monitoring per ICRA 2.0 will continue until the cleaning has been completed and final Infection control inspection has approved clearance.

• Dispose of used filters, PPE, and rags per environmental regulations. Government disposal sites will not be used. Dispose at an approved off base facility.

• AHU system reinstalls and operations must match existing

• Conduct post work inspection with NAVFAC

• Perform visual inspection with Facility Management and Safety Manager

• Remove all ICRA barriers after all work has been completed and Infection Control team is accepting to the barrier removal

• Clear Lockout/Tagout of electrical panels in accordance with EM385-1-1/OSHA CFR and hospital facility safety policy.

• Prepare AHU for start up

• Conduct start-up of AHU

• Visually observe operation of AHU

• Confirm AHU is maintaining space temperature and Humidity set points

• Check ultraviolet lamps if applicable

• Check control system and devices for proper operation

• Check P-traps and prime as needed

• Check for proper operation of cooling and heating coils

• Check for proper damper operation

Submittal Documentation

The contractor shall submit to NAVFAC COR for review and comment by the government the following submittals.

• The cleaning and disinfectant products that are being used to clean the air handlers.

• The new air handler fan wheels/impellers.

• System balancing plan for the shaft, impeller, and bearing.

• Rust inhibitor that will be used on the interior and exterior of AHU meeting ASHRAE

• Interior sound attenuation and/or insultation material sealing product meeting ASHRAE

• Perform pre/post-total airflows and static pressure profile of AHU unit.

• System pre and post test/inspection results report.

• Replacement air filters/bag filters if applicable.

• Daily Record: items completed, cleaning agents and lot numbers, provided for weekly meetings.

• Obtain final sign-off/BOD prior to demobilization.

2.2 Reporting and Documentation

Contractor shall prepare and submit a Completion Report to include the following:

• Summary of all work tasks to include AHUs cleaned and repaired

• Cleaning logs and QA checklists

• Photos (pre-and-post-cleaning)

2.3 Acceptance Criteria

2.3.1 The acceptance standard for all cleaned surfaces shall be visibly clean as defined in NADCA ACR-2021 Section 5.2, in addition, all interior surfaces of the AHU shall be free of visible dirt, dust, microbial growth, grease, and oils, meaning the surface is free from all non-adhered substances and debris. This does not require the removal of adhered corrosion or staining.

2.3.1.1 Prior to requesting a Government inspection, the contractor shall submit their internal QC checklist and photos demonstrating the unit is ready.

2.3.1.2 Failure to meet the visibly clean standard (e.g., leaving loose debris, tools, or un-rinsed cleaner) shall constitute an inspection failure.

General.

All debris will be removed for disposal. If debris is to be carried through occupied areas it will be double-bagged or wrapped to prevent cross-contamination. All debris will be disposed of per applicable environmental regulations.

The following shall be adhered to while performing work in accordance with this task order:

• Any dust resulting from structural removal will be vacuumed.

• All equipment, safety materials and engineering controls shall be removed

Cleaning Priority:

Priority 1 (quantity 15) Building 15 (quantity 8) AHU-1 Mechanical Room 124 AHU-2 Mechanical Room 133 AHU-3 Mechanical Room 136 AHU-4 Mechanical Room 148 AHU-5 Mechanical Room 221 AHU-6 Mechanical Room 232 AHU-7 Mechanical Room 237 AHU-8 Mechanical Room 247 Building 326 (quantity 7) AHU-1 Mechanical Room 114 AHU-2 Mechanical Room 124 AHU-3 Mechanical Room 124 AHU-4 Mechanical Room 212 AHU-5 Mechanical Room 221 AHU-6 Mechanical Room 221 OAU/AHU-7 Mechanical Room 2101A Priority 2 (quantity 6) Building DD48 (quantity 1) AHU-2 Mechanical Room Building G770 (quantity 1) AHU-1 Mechanical Room Building NH180 (quantity 2) AHU-1 Mechanical Room AHU-2 Mechanical Room Building NH200 (quantity 2) AHU-1 Mechanical Room AHU-2 Mechanical Room

Work Restrictions:

Contractor is permitted to work during non-standard work hours to meet contract completion date and requirements.

Attachment 1: UFGS 23 01 30.41 HVAC system cleaning Attachment 2: Infection Control Risk Assessment/Pre-Construction Risk Assessment (ICRA/PCRA 2.0 fillable form) Attachment 3: Infection Control Risk Assessment from NMLC Attachment 4: UFC 4-510-01 Design: Medical Facilities Attachment 5: Contractor Pre-Demobilization Checklist