26-0702 NH100-120-121 CLEAN HVAC SYSTEMS - SOW.pdf

DISTRIBUTION: DoD COMMUNITY ONLY

SCOPE OF WORK –

CLEAN AIR HANDLING UNITS

Naval Medical Center, Camp Lejeune

Project Title: 26-0702 NH100/120/121 Clean HVAC Systems Project Number: 26M002MZ

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 fifty (50) HVAC Air Handling Units within building NH100 and the 4 Roof Top Units at buildings 120/121 at MCB Camp Lejeune. The cleaning priority is noted below.

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 MCB Camp Lejeune and DHA-FE personnel. Objectives of the meetings are to discuss findings, review comments and address issues pertinent to the contract activities and report status of deliverables.

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 relative 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

The building 100 HVAC system contains fifty air handling units (AHUs). Buildings 120/121 HVAC systems contain 4 (two per building) roof top units (RTUS). This scope of work requires the Contractor to perform comprehensive internal cleaning of the AHUs/RTUs, including supply fans, associated dampers, and in-line return air fans suspended from the slab. Cleaning will include the interior fan housing.

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.

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

c) Drain piping connected to AHU condensate pans.

d) Cleaning will include removal of supply fan impeller, cleaning of the interior fan housing, installation of cleaned impeller/shaft, and installation of new bearings, and balancing of system after re-assembly. Be careful not to damage equipment, if damaged during cleaning it could impact performance and contractor is responsible for damage to components.

e) 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.

f) Wipe clean flex transition material.

g) For Building 120/121 RTUs, clean the corroded inlet cones on the fan assemblies.

h) For Building 121 RTU-2, repair the leaking chilled water line on roof.

i) For Building NH100 AHU-29, the fan assembly has already been cleaned, remainder of AHU is to be cleaned in this contract.

j) For Building NH100 AHU-44 (Lighthouse Café), contractor shall replace the existing damaged electrical circuit breaker with appropriate sized replacement.

k) For Building NH100 AHUs 4, 5, 6, 7, 8, and 12, properly comb the bent coil fins restricting airflow.

Note: Items a-f 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).

• 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 across both floors.

• Review floor plans and confirm exclusion zones.

• Containment barrier between AHU and supply duct is required.

• Lockout/Tagout electrical panels in accordance with OSHA, USACE EM-385, and facility safety policy.

Equipment and Materials Setup

• Mobilize 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, impeller, shaft, installation of new 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 air filters with new after cleaning of 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.

Gross Debris Removal

• Remove and dispose of loose debris, paper, and miscellaneous trash.

Quality Assurance & Documentation

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

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

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

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

• System pre and post test results report.

• AHU system reinstalls and operations must match existing.

• Replacement air filters

• Perform visual inspection with Facility Management and Safety Manager.

• Daily Record: items completed, cleaning agents and lot numbers, provided in weekly meeting.

• Obtain final sign-off prior to demobilization.

• Dispose of used filters, PPE, and rags per environmental regulations.

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)

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

Buildings 120/121 (quantity 4) All four RTUs Building NH100 (quantity 10)

AHU-18 M204 Radiology/Ultrasound AHU-41 M110 Security AHU-10 M113 Same Day Surgery

AHU-12 M301 L&D

AHU-27 M109 MID Help Desk & Safety AHU-30 M112 Nursing/Training AHU-31 M112 Library/Chapel AHU-36 M101 Family Practice AHU-33 M105 Lab

AHU-14 M113 ICU

Priority 2 (quantity = 40):

Building NH100 (mechanical room location noted)

AHU-1 M159 AHU-32 M104 AHU-28-01 M108

AHU-2 M116 AHU-34 M106 AHU-28A M108

AHU-4 M401 AHU-35 M107 AHU-45A Roof AHU-5 N515 AHU-37 M100 AHU-45B Roof

AHU-6 M401 AHU-38 M103 AHU-62 M012

AHU-7 M301 AHU-39 M102 AHU-63 M012

AHU-8 M301 AHU-42 M200

AHU-9 M401 AHU-50 M240

AHU-11 M301 AHU-51 M246

AHU-13 M113 AHU-52 M143

AHU-19 M206 AHU-53 M142

AHU-20 M207 AHU-54 M242

AHU-22 M201 AHU-55 M243

AHU-23 M202 AHU-56 M147

AHU-24 M203 AHU-57 M147

AHU-25 M013 AHU-57A M147

AHU-29 M113 AHU-58 M246

Work Restrictions:

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