26M086CN Multiple BEQ HVAC Chiller Loop Flushing SOW.pdf

DISTRIBUTION: DoW COMMUNITY ONLY

Project: Multiple Location BEQ Chiller Loop Flushing and Chemical Cleaning Project Number / Contract Number: 26M086CN / 26-0431 Date: 3 June 2026 Location: Marine Corps Base Camp Lejeune (MCBCL) & Marine Corps Air Station New River

(MCASNR)

1.0 Project Objective and Location

The contractor shall provide all engineering, labor, specialized equipment, transportation, and materials required to perform heated chemical cleaning, flushing, and passivation of the chilled water (CHW) closed-loop systems servicing the Bachelor Enlisted Quarters (BEQs) located at Marine Corps Base Camp Lejeune, North Carolina.

The primary objective is to remove organic soil, hydrocarbons, flux, pipe mill varnish, pipe compounds, and iron oxide. (Note: Removal of tightly adherent mill scale is not required). All work must comply with UFGS 23 25 00 (HVAC Water Treatment), Section 23 24 00 (Hydronic Pipe Cleaning), and MCBCL Division 1 administrative specifications.

1.1 Designated Flushing Locations (Package 1 & 2)

Work shall be executed in approved phases per the Multi-Building Phasing Plan.

Package Building (BEQ) Numbers Notes / Area Designation

Package

AS4004, AS4006, AS4007, AS4015, AS4206, AS4207, AS4208,

M457, M458

Marine Corps Air Station / Camp Johnson

Package

1140, BB260, BB265, BB355, FC504, FC507, FC360, FC371,

FC372, FC478, FC481, FC515, FC520, FC525, FC530, FC571,

FC573, FC574, HP117, HP118, HP119, HP125, HP175, HP195,

HP235, HP245, HP255, HP265, HP275, HP285, HP295,

HP301, PP2, WC140

French Creek, Hadnot Point, Camp Geiger, Courthouse Bay, Wallace Creek

1.2 Designated BEQ Points of Contact (POC)

All communications regarding building access, Lock-Out/Tag-Out (LOTO) coordination, and localized system isolation must be routed through the designated BEQ Point of Contact (POC) listed below:

Package 1 POC

Building (BEQ) Numbers Designated BEQ POC Phone Number

Area / Notes

AS4004, AS4006, AS4007, AS4015, AS4206,

AS4207, AS4208

Rwegasira A. "Reggie" Rugumamu

910-449-

Air Station

M457, M458 Aaron Green 910-450-

M-Area

Package 2 POCs

Building (BEQ) Numbers Designated

BEQ POC

Phone Number

Area / Notes

FC504, FC507, FC360, FC371, FC372,

FC478, FC481, FC515, FC520, FC525,

FC530, FC571, FC573, FC574

GySgt Alan Papstein

(910) 451-

French Creek

HP117, HP118, HP119, HP125, HP175,

HP195, HP235, HP245, HP255, HP265,

HP275, HP285, HP295, HP301, PP2,

WC140, BB265, BB355

Chuck Callahan

910-451-

Hadnot Point / Camp Geiger / Courthouse Bay / Paradise Point

BB260 Casey Barnes 910-440-

Courthouse Bay

1140 Gene Rued 910-451-

Main Side

2.0 Material and Chemical Requirements

All chemicals must be acceptable for discharge into the sanitary sewer, pending MCBCL Environmental Affairs Division (EAD) coordination and approval.

Material Type Section 23 24 00 Specification

Cleaning Compound / Detergent

Alkaline phosphate or non-phosphate detergent/surfactant (Suggested:

Trisodium phosphate). Strictly Prohibited: Sodium nitrite, molybdate, or similar corrosion inhibitors in the detergent phase. The only permitted inhibitor during cleaning is sodium sulfite (oxygen scavenger).

Passivation / Treatment Chemicals

Sodium Sulfite, Sodium Lauroyl Sarcosinate, and Dipotassium Phosphate (used strictly as a pH buffer).

Volume Testing Agent

Fluorescent dye for fluorometric analysis.

3.0 Performance, Quality Control, and Execution

Execution must be coordinated with the Contracting Officer's Representative (COR) using the standard DoD Three Phases of Control. The contractor must meticulously adhere to the following sequence:

Phase Technical Execution

Phase 1: Isolation & Volume Testing

Close terminal unit service valves and open bypass valves (or drive 3-way valves 100% to bypass without closing service valves). Install temporary bypass piping upstream of terminal unit supply and downstream of return. Fill system with water and fluorescent dye to determine exact system volume via fluorometric analysis.

Phase 2: Initial Heated

Introduce detergent to manufacturer's specified concentration. Utilize existing steam heating systems (or temporary boilers) to heat and maintain water

Circulation (48 Hours) temperature at 120°F. Circulate for a minimum of 48 hours while bleeding water/solids from the air/solids separator. Modulate drain to maintain pressure and makeup water concentration. Do not exceed pump motor service factor amperage.

Phase 3: Terminal Unit Circulation (48 Hours)

Clean all strainers. Open terminal device service valves (AHUs, FCUs, VAVs) and close bypass valves. Circulate heated (120°F) detergent solution through the terminal devices for an additional minimum of 48 hours. Periodically check and manually clean all terminal units and pump strainers during this period.

Phase 4: Fresh Water Flush

Drain the system and thoroughly flush with fresh water. Coordinate with the MCBCL Construction Manager (CM) to demonstrate system water opacity runs perfectly clear. Remove the pump startup strainer and conduct a final manual cleaning of all y-strainers and inline screens (including all VAV screens).

Phase 5:

Passivation & Chemical Treatment

Treat the system water to the following strict parameters:

• Sodium Sulfite: 30-100 ppm

• Sodium Lauroyl Sarcosinate: 30-100 ppm• pH: 8.5 - 9.5 (utilizing Dipotassium Phosphate as a buffer).

4.0 Testing, Signage, and Deliverables

The contractor must provide the following specialized mechanical deliverables via the Government's Electronic Construction and Facility Support Contract Management System (eCMS):

Deliverable Description & Timeline

Longitudinal Water Testing Report

A formal report documenting the verified system volume, pH, and sulfite concentration levels for the initial treatment, plus mandatory retests at One (1) Day, One (1) Week, and Four (4) Weeks post-treatment. If levels fall out of range, retreatment and retesting are mandatory. Submit to the KO and MCBCL Mechanical Design Branch.

Mechanical Room Signage

Provide and install one permanent plastic sign (minimum 12"x12" with 1/2" engraved lettering) hung in an unobstructed view near the chemical shot feeder in each mechanical room. See Section 4.1 for sign text.

Permanent SDS Placement

Provide Safety Data Sheets (SDS/MSDS) for all treatment chemicals and permanently locate a physical copy in each mechanical room.

4.1 Mandatory Engraved Signage Text

The 12"x12" engraved signs must explicitly read:

"This hydronic system is treated to the following chemical parameters:

Sodium sulfite: 30-100 ppm Sodium lauroyl sarcosinate: 30-100 ppm pH*: 8.5 - 9.5 System Volume: [Insert Verified Volume] Gallons *use Dipotassium Phosphate as pH buffer"

WARNING - PROJECT PERSONNEL TO PERFORM ONLY OPERATIONAL MAINTENANCE DURING

THE WARRANTY PERIOD.

5.0 Safety, Environmental, and Base Access Controls (MCBCL)

Category Compliance Standard

Site Safety & Access

Full compliance with USACE EM 385-1-1. A dedicated SSHO must be present. All personnel require DBIDS badges and MCBCL UXO 3R training.

Wastewater & Effluent Discharge

Strict Zero-Tolerance Unauthorized Discharge Policy. While Section 23 24 00 states chemicals shall be acceptable for sanitary sewer, the Contractor must obtain written authorization from the MCBCL Environmental Affairs Division (EAD) prior to discharging any flushed effluent into the base sewer system.

Solid Waste & Landfill

The MCBCL Sanitary Landfill is strictly for non-contaminated dirt/gravel. All other construction debris (replaced strainers, metal fittings, construction waste) must go to the Defense Reutilization Maintenance Office (DRMO) or an off-base commercial facility.