U.S. Embassy Amman — FAC SOW: Water Treatment Preventive Maintenance

Rev. 1.0 — Aug 2026 Page 1 of 18

U.S. EMBASSY AMMAN, JORDAN

Facilities Management Office (FAC)

STATEMENT OF WORK

Preventive Maintenance and Water Treatment Services Compound-Wide Water Systems — HVAC, Potable (Domestic) and Swimming Pool

1. General Information

1.1 Purpose

The purpose of this Statement of Work (SOW) is to define the requirements for the planning, procurement, preventive maintenance, testing, monitoring and reporting of the water treatment programs serving all water systems on the U.S. Embassy Amman compound. This is a support-service water treatment contract under which the Contractor furnishes the treatment chemicals, equipment, laboratory analysis, professional water-treatment services and reporting required to preserve the interior waterside condition of the compound's piping and equipment; to control corrosion, scaling, deposition, and microbiological fouling (including Legionella); and to maintain water quality within the parameters established in this SOW. The intent is to establish a cost-effective, reliability-centered program that protects asset value, reduces operating cost, conserves water and chemicals, and safeguards the health of building occupants and operating personnel.

1.2 Scope Summary

The Contractor shall provide all labor, supervision, project management, transportation, chemicals, consumables, test kits, laboratory services, tools, and reporting necessary to deliver a complete water-treatment maintenance program for the following systems:

System Sub-systems / Loops Covered Primary Control Objectives

HVAC Water Treatment Primary & secondary chilled water (closed); heating hot water (closed);

condenser water / cooling towers (open)

Corrosion & scale control, glycol integrity, microbiological & Legionella control, deposition control

Potable (Domestic) Water Treatment

Pre-treatment & storage, filtration (media / cartridge / GAC), softening, disinfection, booster & transfer pumping, wells, storage tanks

Compliance with U.S. EPA Primary & Secondary Drinking Water Regulations;

disinfection residual; hardness;

corrosion control

Swimming Pool Water Treatment

Recirculation & filtration, chemical dosing (chlorine / pH), salt chlorination where installed, heater and circulation equipment

Sanitizer & pH control, water clarity, bather safety, equipment protection

Note on scope boundaries: This contract addresses water chemistry treatment, monitoring, and the maintenance of treatment/dosing equipment and directly associated pumps as listed in the equipment

Rev. 1.0 — Aug 2026 Page 2 of 18 inventory (Exhibit E). Major mechanical overhaul or replacement of chillers, boilers, or cooling-tower structures is outside this contract, except where the Contractor identifies and reports conditions that jeopardize the treatment program.

1.3 Contract Type and Period of Performance

• Contract type. Firm-fixed-price (FFP) commercial service contract, payable entirely in Jordanian Dinars

(JOD). No additional sums are payable for escalation in materials, equipment, or labor, or for currency-exchange fluctuation.

• Period of performance. One (1) base year from the date of award, with four (4) one-year options to renew, exercised at the Government's discretion in accordance with FAR 52.217-9.

• Award basis. Award is anticipated to the responsive, responsible offeror proposing the lowest evaluated price that meets all requirements of this SOW. This document is the technical reference against which offerors price the work.

• VAT. Value Added Tax is not applicable; the U.S. Embassy holds a host-government tax-exemption certificate. VAT shall not be included in line-item rates or invoices.

1.4 Definitions and Acronyms

Term Definition

CO / KO Contracting Officer — the sole authority to enter into, administer, or modify the contract.

COR Contracting Officer's Representative — the FAC Mechanical Engineer / Facilities Manager designated in writing to act for the CO on technical matters within delegated limits.

FAC / FM Facilities Management Office / Facilities Manager, U.S. Embassy Amman.

OBO Bureau of Overseas Buildings Operations, U.S. Department of State.

PM Preventive Maintenance.

RCM Reliability-Centered Maintenance.

SDS / MSDS Safety Data Sheet / Material Safety Data Sheet.

WMP Water Management Program (Legionella risk management per ASHRAE 188).

mpy Mils per year (corrosion rate).

TDS Total Dissolved Solids.

HPC Heterotrophic Plate Count.

CoC Cycles of Concentration (open recirculating systems).

LSI / RSI Langelier Saturation Index / Ryznar Stability Index.

POSHO Post Occupational Safety and Health Officer.

NTU Nephelometric Turbidity Units.

2. Systems to Be Maintained (As-Built Basis) The volumes and equipment below establish the design basis for treatment. The Contractor shall verify actual system volumes, equipment counts, and connection points during the initial site survey (Section 4) and reconcile any discrepancies with the COR in writing. Approximate loop volumes are provided for chemical-dosing calculations and do not relieve the Contractor of the responsibility to confirm field conditions.

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2.1 HVAC Water Systems

Loop / System Type Approx. Volume

Primary & Secondary Chilled Water Closed loop 90,000 liters

Condenser Water (cooling towers) Open loop 20,000 liters

Heating Hot Water Closed loop 50,000 liters

Cooling towers. Open-circuit, induced-draft, counter-flow cooling towers (design basis Evapco Series AT or approved equal, e.g., Baltimore Aircoil or Marley). Towers include FRP/galvanized basins, drift eliminators, PVC fill, makeup water level control, and basin strainers. Because these are open evaporative devices, they are the compound's principal Legionella risk and are subject to the Water Management Program in Section 8.

Closed loops. Chilled-water and heating-hot-water loops are treated with a molybdate-based corrosion/scale inhibitor package. The chilled-water system is maintained at a nominal 30% propylene-glycol concentration for freeze protection; glycol integrity (freeze point, inhibitor reserve, and degradation by-products) is part of the treatment program.

Side-stream filtration. Condenser water is served by a sand side-stream filter; chilled- and hot-water loops are served by cartridge/bag filtration rated 98% efficient at 20 microns, fitted to the Embassy's existing filter housings.

2.2 Potable (Domestic) Water Treatment System

Approximate treated/stored domestic water volume: 260,000 liters. The system is a multi-barrier potable treatment train designed to comply with the U.S. EPA National Primary and Secondary Drinking Water Regulations (40 CFR Parts 141–143) and the Safe Drinking Water Act, and to be capable of producing potable water with one unit of each process out of service. Principal components include:

• Pre-treatment: pre-storage filtration removing particles ≥ 5 microns, with redundancy (one unit out of service).

• Filtration: carbon (GAC) filters, cartridge filters, and media filtration.

• Softening: duplex water softeners (ion exchange) with brine tank(s).

• Disinfection: chlorination (liquid/tablet/on-site generation) and/or UV, maintaining a free-chlorine residual of 0.2–0.5 mg/L throughout the distribution system.

• Process pressure FRP tanks (ASME Section X), controls, and testing/monitoring equipment (turbidity, chlorine residual, hardness, incubator/membrane-filtration bacteriological kit).

• Pumping: cistern, booster, transfer, and chemical-dosing pumps; submersible well pump(s) and water well(s) where present.

• Storage: below-ground raw and finished/treated water storage (Plant Room) and above-ground UTL Building storage.

2.3 Swimming Pool Water Treatment System

The compound swimming pool(s) are served by a recirculation, filtration, and automated chemical-treatment system. The design basis includes cartridge filtration, automated chlorine and pH (acid) dosing with a controller, salt chlorine generation where installed, a pool heater, circulation pumps, and associated safety equipment.

The treatment objective is to maintain sanitizer and pH within safe bather-health ranges, water clarity, and

Rev. 1.0 — Aug 2026 Page 4 of 18 equipment protection. Target operating set-points: pH ≈ 7.2 and free chlorine residual ≈ 0.6 mg/L (or per governing pool code and COR direction).

3. General Requirements

Requirement Description

Statement of intent

This SOW describes the preventive maintenance, testing, monitoring, and deliverables to be performed by the Contractor. The Contractor's accepted cost proposal and maintenance schedule, together with this SOW and the deliverables developed by the Contractor and accepted by the U.S. Government (USG), delineate the full scope and work limits of the service.

Sole points of contact

The Contracting Officer (CO) and the Contracting Officer's Representative (COR) are the sole points of contact for all technical and contractual matters. The Contractor shall take no direction, verbal or otherwise, from any USG personnel other than the CO or COR.

Services included

The Contractor shall provide site assessment and survey; project management;

professional water-treatment services; chemical and material procurement and logistics; preventive maintenance and testing; laboratory analysis; cost estimating and scheduling; and general support for the duration of the contract.

Reliability-centered maintenance (RCM)

The Contractor shall apply RCM principles to all activities, using high-quality, cost-effective materials and chemicals that are maintainable with locally available supplies and services to the extent practical, and shall maximize interchangeability of parts with existing Post systems.

New parts and materials

Except as otherwise directed by the CO, all parts, materials, components, and equipment furnished by the Contractor shall be new (not used or third-party remanufactured) and equal to or better than the manufacturer's recommended replacements.

Discrepancy reporting Within three (3) calendar days of receipt of the USG SOW/technical data, the Contractor shall notify the CO in writing of any discrepancies, errors, or conflicts discovered.

References The Contractor shall provide at least three (3) customer references for water-treatment work of similar scope and value.

Technician documentation The Contractor shall provide technicians' resumes and training/certification documentation within twenty (20) days of the notice to proceed.

Quality control The Contractor shall maintain a documented quality-control process agreed with the COR, and shall allow the USG (and its subcontractors' relevant quality systems) access for monitoring and quality auditing throughout the contract.

Care of Government property

The Contractor shall not use any method or substance that may damage equipment or systems. Any damage or loss caused by the Contractor's negligence or practices shall be corrected at the Contractor's expense, or the Contractor shall reimburse the USG for the cost of rectification.

Document ownership

All deliverables, documents, data, and media (including USG-provided documents) remain USG property. Duplication or distribution outside the Contractor's execution team is prohibited without the CO's written authorization. Upon completion of each visit, all documents, electronic media, and photographs shall be submitted to the Government with the service report.

Least interference The Contractor shall schedule and coordinate all work to cause the least interference with Post operations. Where interference is unavoidable, the Contractor shall

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Requirement Description minimize its impact and modify schedules if the COR determines a conflict with critical Post operations exists.

4. Initial Site Survey, Baseline and Mobilization Within thirty (30) calendar days of the notice to proceed, the Contractor shall complete a comprehensive baseline survey and submit a Baseline Report to the COR. The survey establishes the starting condition of each system and the specific chemical program to be applied. At a minimum the Contractor shall:

1. Verify and document actual loop volumes, equipment inventory, connection/injection points, and existing dosing/control equipment for all three systems.

2. Perform a full baseline water analysis of each loop and of the make-up/source water, including an AWWA RTW analysis of source water to determine the CCPP, Langelier Saturation Index (LSI), Ryznar Stability Index (RSI), and Aggressiveness Index, and use these to establish the chemical balance required to prevent corrosion and scale.

3. Establish, for each chemical, the minimum and maximum control ranges to be maintained, avoiding unnecessarily high chemical levels in order to control cost and adverse chemical reactions.

4. Submit the proposed chemical program with manufacturer specifications, chemical composition, SDS/MSDS, and equipment cut sheets (English and Arabic) for COR approval before use (Section 6).

5. Submit a proposed 12-month maintenance schedule (monthly visit calendar) and the routine (daily/weekly) operator test plan to be executed by Post staff.

6. Draft or update the compound Water Management Program (WMP) for Legionella control per Section 8.

5. Contracting Officer's Representative (COR) The CO may designate one or more Government employees, by name or position, as COR, with the scope and limits of authority stated in the designation. The COR may not change the terms, conditions, or price of the contract unless the COR is a warranted Contracting Officer with delegated authority. All technical questions concerning the scope and requirements of this contract shall be directed to the COR (the Facilities Manager / Mechanical Engineer, U.S. Embassy Amman).

6. Technical Specifications — Chemicals, Equipment and Testing

6.1 General

• All equipment, chemicals, and testing procedures/kits shall be approved by the COR prior to use.

• The Contractor shall submit manufacturer specifications, SDS/MSDS (including chemical composition), and equipment cut sheets for all equipment, chemicals, and testing procedures in both English and Arabic.

• Chemicals shall have a storage-life expectancy of at least one (1) year; the Contractor shall ensure proper storage and that no chemical past its expiration date is used.

• The Contractor shall establish and maintain minimum/maximum control ranges for each chemical (Section 4.3).

• Sustainable chemistry preference. Where technically suitable, the Contractor shall favor NSF-certified, environmentally responsible chemistries (e.g., non-chromate corrosion inhibitors, and non-nitrite

Rev. 1.0 — Aug 2026 Page 6 of 18 formulations where compatible), and shall optimize cooling-tower cycles of concentration to minimize make-up water, blowdown, and chemical consumption without compromising corrosion, scale, or microbiological control.

6.2 HVAC Water Treatment Chemistry

6.2.1 Closed Loops (Chilled Water and Heating Hot Water)

• Corrosion/scale inhibitor: molybdate-based inhibitor designed for closed hot and chilled recirculating systems, in liquid form, pH 10.8–12.5, density 1.03–1.07 kg/L, containing no sodium nitrite, compatible with propylene glycol. Minimum composition to include sodium molybdate, sodium hydroxide, sodium tetraborate, and pentahydrate.

• Glycol: propylene glycol with inhibitors, maintained at 30% concentration in the chilled-water system, meeting the requirements of DOWFROST by Dow Chemical Company or approved equal.

• Closed-loop filter media: rated 98% efficient at 20-micron particulate and dimensioned to fit the Embassy's existing filtration units; cartridge/bag pressure drop not to exceed ~18 kPa clean and ~35 kPa dirty at design flow.

• Passivation: newly cleaned or refilled closed loops shall be chemically cleaned/flushed and passivated in accordance with the inhibitor manufacturer's procedure before being returned to normal treatment.

6.2.2 Open Loop (Condenser Water / Cooling Towers)

• Program to include a scale/deposit sequestering agent, corrosion inhibitor, acid for alkalinity/pH adjustment (as required), and dual (alternating) biocides to prevent microbial immunity.

• Chemical feed to be automatic and controller-based: inhibitor fed on make-up volume; bleed-off/blowdown controlled on conductivity; biocides fed on a programmable timer with alternation between two formulations.

• Low-chemical liquid-level switches shall deactivate solution pumps and signal an alarm.

6.2.3 HVAC Control Parameters

Parameter Closed Systems Condenser / Open pH 7.0 – 10.0 6.5 – 8.5

Chilled water corrosion inhibitor (as molybdate) 50 – 100 ppm —

Heating hot water corrosion inhibitor (as molybdate) 100 – 150 ppm —

Scale / corrosion inhibitor (as molybdate) — 4 – 10 ppm

Corrosion — mild steel < 1.0 mpy < 2.0 mpy

Pitting — mild steel None None

Corrosion — copper alloys < 0.1 mpy < 0.2 mpy

Scaling & deposition None None

Organic / microbiological growth Total aerobic count < 10,000/mL;

no visible deposits; no health hazard

None; controlled by biocide program

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6.3 Potable (Domestic) Water Treatment Chemistry

• All chemicals in contact with potable water shall comply with U.S. EPA regulations and be certified to

NSF/ANSI Standard 60 (Drinking Water Treatment Chemicals); materials/piping to NSF 61 and NSF 14 as applicable.

• Maintain a free-chlorine residual of 0.2–0.5 mg/L in all parts of the distribution system.

• Treated water shall meet U.S. EPA Primary and Secondary Drinking Water Regulations (40 CFR Parts 141– 143).

Potable Parameter Maintenance Target

Chlorine residual 0.2 – 0.5 mg/L throughout distribution

Microbiological & chemical constituents Meet U.S. EPA Primary & Secondary Drinking Water Regulations (40 CFR 141–143)

Corrosion — mild steel < 2.0 mpy

Pitting — mild steel None

Corrosion — copper alloys < 0.2 mpy

Scaling & deposition None

Microbiological fouling No visible deposits; no health hazard; total HPC < 500 CFU/mL

6.4 Swimming Pool Water Chemistry

• Sanitizer and pH chemicals shall be handled per manufacturer and occupational-safety requirements; SDS provided in English and Arabic.

• Maintain sanitizer and pH within the governing pool code and COR-approved ranges (nominal free chlorine ≈ 0.6 mg/L, pH ≈ 7.2), with balanced total alkalinity, calcium hardness, and cyanuric acid where applicable.

• Where salt chlorine generation is installed, verify cell operation, salinity, and output; where acid/chlorine dosing is automated, verify controller calibration, feed rates, and tank levels.

6.5 Test Equipment and Laboratory Standards

• HVAC test kit: capable of pH, TDS, dissolved oxygen, biological/microbial count (dip slides), chloride, total alkalinity, and calcium hardness field tests, plus conductivity meter.

• Corrosion coupon racks: two-station rack for each closed loop and four-station rack for the open condenser system, with mild-steel and copper coupons (copper installed downstream of mild steel).

• Potable test set: turbidity, free/total chlorine, hardness, and a membrane-filtration/incubator bacteriological kit (e.g., Colilert or MILLIPORE) for coliform/HPC.

• Applicable laboratory standards include ASTM D 3370 (sampling) and, as relevant, ASTM D 859 (silica), D 1066 (steam), D 1067 (acidity/alkalinity), D 1068 (iron), and D 1126 (hardness); potable bacteriological analyses by a certified laboratory.

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7. Safety, Health and Environmental Management (SHEM) The Contractor shall take all reasonable and proper safety precautions to prevent death, injury, or property damage on the compound and at any offsite locations, and shall maintain and use all equipment so as to minimize the risk of accident, injury, loss, or damage. In addition to host-country statutory requirements, the Contractor shall:

• Ensure proper disposal of toxic substances where applicable, and that personnel are knowledgeable of and adhere to all relevant occupational health-and-safety legislation and SDS.

• Ensure all electrical equipment and associated materials comply with UL requirements, and follow all NFPA guidelines regarding fire, smoke, or venting of noxious substances.

• Ensure personnel are adequately trained and instructed in the safe use, handling, and operation of materials and equipment, and provide reasonable proof of such training to the U.S. Embassy on request.

• Ensure personnel are certified as having completed occupational health-and-safety training and have been issued all necessary Personal Protective Equipment (PPE) for safe execution of this contract.

• Present training program(s) that satisfy the U.S. Embassy during submittal, and bring any questions or injuries to the attention of the Post Occupational Safety and Health Officer (POSHO).

• Provide and maintain SDS at all chemical storage and use points, ensure secondary containment and correct storage of chemicals, and protect personnel against corrosive or hazardous treatment chemicals.

8. Water Management Program for Legionella Control (ASHRAE 188) Because the compound operates open evaporative cooling towers and stored potable water, the Contractor shall support a written Water Management Program (WMP) consistent with ANSI/ASHRAE Standard 188 and applicable CDC/industry guidance. The WMP is a living document maintained jointly by the FAC/COR and the Contractor.

1. Establish and maintain a program team, process-flow description, and building water-system schematics identifying areas where Legionella and other waterborne pathogens could grow and spread.

2. Identify control locations and control limits (e.g., disinfectant residual, temperature, biocide levels, conductivity) and the monitoring frequency at each.

3. Define corrective actions when control limits are exceeded, and confirmation/verification procedures that the WMP is being followed and is effective.

4. Implement a routine microbiological monitoring regime for cooling-tower water, including dip-slide/aerobic counts at each service visit and periodic Legionella culture testing (recommended at least quarterly for cooling towers, and additionally after any disinfection or system disturbance) by a certified laboratory.

5. Maintain cooling-tower cleanliness and biocide control to prevent biofilm, and perform disinfection/remediation cleaning of towers on a scheduled basis and following elevated results, extended shutdown, or COR request.

6. Document all monitoring, exceedances, and corrective actions in the service reports and in the WMP log.

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9. Maintenance Program, Visits and Frequencies

9.1 Support-Service Delivery Model

This is a support-service water-treatment contract with joint responsibilities between the Embassy facility-management staff and the Contractor:

• Routine operator testing (by Post staff). Embassy FAC staff conduct routine (daily/weekly) water-treatment tests of the HVAC and potable systems and e-mail the results to the Contractor on a weekly basis (potable results at least monthly).

• Technical analysis (by Contractor). The Contractor performs a technical analysis of each set of results and responds within twenty-four (24) hours, directing FAC staff to adjust chemical dosages and/or equipment operation as necessary to keep each system in range.

• Monthly on-site visits (by Contractor). The Contractor visits the compound monthly (twelve (12) times per year) to service all covered systems, and is responsible for all logistics, including transportation and any lodging for its staff.

• Log review. At each visit the Contractor reviews the facility's water-treatment and operating logs to verify chemicals are within design parameters and to identify trends.

• Monthly conference & report. The Contractor discusses conditions with the COR and operating engineers monthly and follows up with a written service report within three (3) business days of each visit (Section 10).

9.2 Preventive-Maintenance Frequency Matrix

The table consolidates the minimum tasks and frequencies across all systems. Detailed task content follows in Sections 9.3–9.6. Manufacturer O&M requirements take precedence where more stringent.

9.2.1 HVAC Water Treatment

Task Frequency Notes

Routine chemistry tests (pH, conductivity, inhibitor, biocide) by Post staff Daily / Weekly Results emailed weekly to

Contractor

Contractor technical analysis & dosing direction Weekly (≤24 h response) Adjust feeds as required

On-site inspection & full water analysis (all loops) Monthly Controller, sensors, pumps, tubing, accessories

Controller/sensor calibration against known standard Monthly Conductivity, pH; verify solenoid, meter, pumps

Cooling-tower dip-slide / aerobic count Monthly Feeds the WMP (Section 8)

Corrosion coupon change-out & lab analysis (mild steel & copper) Every 90 days Written coupon report to COR within 14 days of analysis

Glycol test — freeze point, inhibitor reserve, pH/degradation Semi-annually Top-up/replace glycol as required

Legionella culture test (cooling towers) Quarterly (min.) Certified lab; plus after disinfection/disturbance

Side-stream / cartridge filter media inspection & change Quarterly / As required Per pressure-drop limits

Cooling-tower cleaning & disinfection Semi-annually / As required

And after elevated results or shutdown

Rev. 1.0 — Aug 2026 Page 10 of 18

Task Frequency Notes

Comprehensive annual water-treatment review & report Annually Trends, asset condition, recommendations

9.2.2 Potable (Domestic) Water Treatment

Task Frequency Notes

Routine operator testing (chlorine, pH) by Post staff Daily / Weekly Results emailed monthly to Contractor

Contractor technical analysis & operations direction Monthly (≤24 h response) Re-establish effective treatment

Record pressures & chemical levels; replace dosing detection probes Quarterly Inspect metering pumps & tubing

Free/total chlorine & pH in all domestic tanks Quarterly Distribution verification

Booster pump service (clean, inspect, lubricate, megger, current/voltage) Semi-annually Record readings

Full potable system service (softeners, media, backwash, brine, dosing, pumps, wells, tanks, controllers) Annually See Section 9.4

Certified-lab potable analysis (full panel incl. metals, coliform, HPC, turbidity) Annually Plus well chemical & bacteriological analysis

Backflow preventer / anti-siphon certification (wells) Annually Where wells present

Tank inspection, cleaning & disinfection Annually / As required

Per AWWA C652 (tanks) & ALDAC 137958

9.2.3 Swimming Pool Water Treatment

Task Frequency Notes

Sanitizer & pH verification / controller check Each visit (monthly)

Calibrate controller; verify feed rates

Water balance (alkalinity, hardness, CYA), clarity check Monthly Adjust to code / COR ranges

Filter inspection / backwash verification; salt cell inspection Monthly / Quarterly Where salt system installed

Circulation pump, strainer, heater check Quarterly Report deficiencies

Full seasonal service & water-quality certification Annually / Season start Test kit & consumables verified

9.3 Detailed Tasks — HVAC Water Treatment

9.3.1 Safety and Standing Requirements

• Chemicals shall comply with EPA regulations and be handled per occupational-safety requirements;

employ PPE against corrosive/hazardous chemicals; be familiar with all SDS.

• Water-treatment specialists shall be properly trained and certified; treatment shall be based on proven standard engineering practice and the manufacturer's directions.

• Maintenance includes chemicals, chemical feeding, maintaining proper water conditions, controlling bleed-off, protecting idle equipment, and record-keeping; ensure chemicals are properly stored, test equipment clean, and no chemical past expiration.

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9.3.2 Monthly Inspection and Analysis

1. Sample water from each closed loop and the open system per manufacturer recommendations; test for proper chemical levels and adjust feeds to maintain optimal conditions.

2. Use the conductivity meter to test total solids/conductivity; record and analyze abnormal changes in the log.

3. Check pH with strips and/or meter; clean sample bottles and wipe down all chemical-treatment equipment.

4. Visually inspect the controller, sensors, pumps, tubing, and accessories; test chemical parameters (pH, TDS, conductivity, aerobic plate count, corrosion-inhibitor level, biocide dosage for both biocides); test supply water for base conditions (iron, manganese, alkalinity, total hardness, silica, chloride).

5. Calibrate sensors against a known standard; verify the controller, solenoid valves, contact water meter, inhibitor pump, and biocide pumps are functioning per controller settings; verify chemical is dosed only per specification.

6. Submit a service report describing any errors/causes and corrective action taken.

9.3.3 Corrosion Coupon Program (every 90 days)

• Monitor and change mild-steel and copper corrosion coupons every 90 days; send used coupons to the laboratory for analysis.

• Provide a written coupon corrosion-test report to the COR within fourteen (14) calendar days after analysis, comparing results against the control limits in Section 6.2.3.

9.4 Detailed Tasks — Potable (Domestic) Water Treatment

9.4.1 Quarterly

1. Check and record pressures and chemical levels; replace chemical dosing detection probes.

2. Review daily logs for trends; check chemical levels in addition tanks; adjust and clean tanks as necessary;

check the system for leakage and all tubing for tightness.

3. Inspect and clean metering pumps (diaphragm, seepage at vent hole, discharge tubing, watertightness, correct feed, electrical connections); replace pH/chlorine sensors as applicable, clean filters/flow cell/fittings, and calibrate new sensors.

4. Test unit safety functions (alarm relay, flow sensor/controller stop); wipe down the unit; verify maintenance records; check total & free chlorine and pH in all domestic tanks.

9.4.2 Semi-Annually — Booster Pumps

1. Perform lockout/tagout; schedule the outage with operating personnel; follow site and manufacturer safety procedures.

2. Clean and inspect the pump (casing, coupling, motor); inspect wiring/motor/controls for overheating, broken insulation, loose/corroded connections, damaged conduit; check for leaks and coupling alignment/base-plate bolts.

3. Lubricate pump/motor as applicable (use motor-rated grease; do not over-grease; do not use pump grease in the motor); conduct an operational test; megger the motor and record; check running current and voltage per phase and record.

9.4.3 Annually — Potable System (in addition to quarterly)

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1. Cycle the backwash flow controller and verify proper operation; evaluate media for replacement;

check/flush softening; check and adjust dosage/metering.

2. Measure and adjust water hardness to target; measure conductivity, pH, and pressures; check brine density, float control, and automatic fill valve; inspect softener/brine tank for corrosion and repair;

lubricate valves/motors; check wiring and phasing.

3. Have treated water tested by a certified laboratory for: pH, alkalinity, aluminum, calcium, copper, bromide, fluoride, nitrite, nitrate, orthophosphate, silica, strontium, iron, manganese, lead, magnesium, sodium, chloride, total hardness, TDS, turbidity, free chlorine, coliform bacteria, HPC, and temperature.

4. Controllers (chlorination, R/O, pH, corrosion inhibitor) and pumps (circulation, well): clean/inspect, check line/load connections and control wiring for tightness, verify timers/clocks, energize and confirm each controlled circuit, replace burned-out pilot lights, evaluate UPS/battery backup.

5. Submersible/well pumps: inspect wiring, verify capacity/pressure, measure current and voltage vs.

nameplate, megger the motor.

9.4.4 Water Wells (where present)

1. Inspect well-head casing, cover/cap, and sanitary seal for cracks, cleanliness, and watertightness; verify no contamination sources are stored nearby and ground slopes away ≥ 15 ft; check backflow preventers/anti-siphon devices and provide annual backflow certification.

2. Sample and send to a certified laboratory for chemical/physical analysis (pH, alkalinity, TDS, turbidity, iron, manganese, nitrate, nitrite, total hardness, ammonia) and bacteriological analysis (total coliform, fecal coliform, E. coli, HPC).

9.4.5 Water Tanks with Controls (above and underground)

1. Perform lockout/tagout and schedule the outage; examine visible interior (fittings, hatches, ladders, manholes) for corrosion and correct; clean/test/inspect sight glasses, valves, fittings, drains, and controls;

clean and inspect the tank level control panel and verify all alarm/control/communication circuits and mechanical level devices.

2. Check for contamination (insects, debris) and notify Post if found; drain, clean, and disinfect tanks per current U.S. Department of State guidelines (ALDAC 137958) and AWWA C652; return the system to service.

9.5 Detailed Tasks — Swimming Pool Water Treatment

1. At each visit: test and balance sanitizer, pH, total alkalinity, calcium hardness, and cyanuric acid (where used); verify the automated chlorine/acid controller calibration, feed rates, and chemical tank levels;

verify salt-cell operation and salinity where a salt system is installed.

2. Inspect and verify filtration and backwash operation; inspect circulation pump, strainer basket, and heater; confirm flow and pressure readings and report deficiencies.

3. Verify water clarity and safety; confirm test-kit reagents and required consumables are on hand;

document readings and corrective actions in the service report.

4. Perform a full seasonal service and water-quality certification at least annually (or at season start), coordinated with the COR.

9.6 Hours of Work

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The Contractor shall schedule all preventive maintenance during normal working hours (Sunday–Thursday), including periodic maintenance that may be required on Saturdays, except on regular or special public holidays when the compound is closed, or as otherwise agreed with the U.S. Embassy before commencement. Where a manufacturer's maintenance specification conflicts with this SOW, the more stringent manufacturer specification prevails.

10. Deliverables and Reporting All reports shall be in English (with SDS and cut sheets additionally in Arabic), submitted electronically to the COR, and shall become USG property. At a minimum, the Contractor shall deliver:

Deliverable Due Content

Baseline / Survey Report Within 30 days of NTP Verified volumes, equipment inventory, source-water RTW analysis (LSI/RSI/CCPP), proposed chemical program & control ranges

Technician resumes & training records Within 20 days of NTP Qualifications, certifications, safety training

Chemical submittals Before use Manufacturer specs, composition, SDS/MSDS, cut sheets (English & Arabic)

Weekly analysis response ≤ 24 h of receiving Post results Technical analysis and dosing/operations direction

Monthly service report ≤ 3 business days after each visit

On-site & lab test results, system status, corrective actions, recommendations, photos, media

Corrosion coupon report ≤ 14 days after analysis Mild-steel & copper corrosion rates vs. limits

Legionella / WMP monitoring Per WMP schedule Dip-slide & culture results, exceedances, corrective actions, WMP updates

Certified potable & well analysis Annually Full chemical/physical & bacteriological panel

Annual program review Annually Trend analysis, asset condition, water/chemical efficiency, next-year recommendations

Training / familiarization records After each session Attendance, topics, materials (16 h/yr, English & Arabic)

11. Performance Criteria and Monitoring The objective of this contract is to provide, throughout its term, a professional level of service delivering: U.S.

Embassy satisfaction with water-treatment maintenance and prompt reaction to changing operational requirements; compliance with applicable statutory and regulatory provisions; best-in-class industry practice;

risk reduction; preservation of asset value; and reduced operating cost. The Contractor shall monitor its own performance against the criteria below and provide reports when required by the U.S. Embassy; the U.S.

Embassy may reject any aspect of the services that fails to comply with the contract or the Contractor's quality system at any time.

Performance Objective Standard Acceptable Level

Water chemistry in range All loops maintained within Section 6 parameters ≥ 95% of tests in range

Responsiveness Analysis & dosing direction after Post results Within 24 hours

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Performance Objective Standard Acceptable Level

Visit schedule Monthly on-site visits performed 12 visits/year; no missed visit

Reporting timeliness Service reports after each visit Within 3 business days

Legionella control Cooling-tower monitoring & corrective action per WMP

Within control limits; timely remediation

Potable compliance Meets 40 CFR 141–143 No unresolved exceedance

Corrosion/scale Coupon & deposition results Within Section 6 limits

Safety Zero preventable incidents; PPE & SDS compliance Full compliance

12. Training and Familiarization The Contractor shall provide sixteen (16) hours of familiarization training annually, in both English and Arabic, to acquaint Post operators with the necessary water-treatment tests, the control ranges for each chemical, safe handling of equipment and chemicals, and new water-treatment procedures and technologies. Training content and schedule shall be submitted for COR approval, and training records delivered after each session.

The Contractor shall also assure that Post water-treatment personnel understand the proper operation and maintenance of the treatment equipment and shall correct deficiencies found during on-site familiarization.

13. Access to Government Buildings and Security Requirements

• Designated representative. The Contractor shall designate a representative to supervise its technicians and serve as liaison with the U.S. Embassy. Contractor employees shall be on-site only for contractual duties and shall access system-dedicated rooms only with the specific permission of the Facility Manager, CO, or COR, with or without security escort as directed.

• Personnel security. The U.S. Embassy reserves the right to deny access to any individual. The Contractor shall provide names, biographic data, and police clearances for all personnel prior to their use on this contract.

• Contractor identification. Personnel shall identify themselves as non-federal (contractor) employees in meetings, e-mail signature blocks, and directories, and shall not use Department of State logos on business cards.

14. Standards of Conduct

• Contractor employees shall maintain satisfactory standards of competency, conduct, cleanliness, appearance, and integrity, and shall reflect credit on themselves, their employer, and the U.S.

Government; the Embassy may direct removal of any employee for failure to comply, and the Contractor shall immediately replace such employee at no additional cost.

• Employees shall wear clean, neat, complete uniforms on duty; the Contractor bears the cost of purchasing, cleaning, and repairing uniforms and personal equipment.

• Neglect of duties (including sleeping on duty, unreasonable delays, conducting personal affairs on duty, or refusing to cooperate in worksite security) shall not be condoned.

• Employees shall not possess, sell, consume, or be under the influence of intoxicants, drugs, or similar substances while on duty.

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15. Observance of Legal Holidays The Contractor shall not perform routine work on days observed as holidays by the Department of State at Post, except as agreed with the COR. When the Department grants administrative leave to Government employees, assigned contractor personnel in Government facilities are dismissed accordingly, provided the Contractor continues to furnish sufficient personnel for round-the-clock or scheduled critical tasks. Holiday work carries no premium compensation unless authorized elsewhere in the contract.

16. Contract Administration, Invoicing and Clauses

16.1 Invoicing and Payment

This is a firm-fixed-price contract. The Contractor should expect payment thirty (30) days after completion of service/delivery or thirty (30) days after receipt of a proper invoice at the Embassy's payment office, whichever is later. Invoices shall be submitted in PDF to the Financial Management Office (FMO) and shall include: the business name and invoice date; a description (in English) of services provided and dates of service; the Purchase Order number; payment terms including discounts; the name, title, telephone, and address of the responsible employee who can answer invoice questions; and bank information.

16.2 Incorporated Clauses

The FAR and DOSAR terms and conditions are incorporated by reference and apply to this contract, including but not limited to FAR 52.212-4 (Contract Terms and Conditions — Commercial Items), 52.212-5, 52.217-8 (Option to Extend Services), 52.217-9 (Option to Extend the Term of the Contract), 52.228-3/5 (insurance), 52.229-6 (Foreign Fixed-Price Contracts), and the DOSAR clauses for Contractor Identification, Payment Schedule and Invoice Submission (652.232-70), Observance of Legal Holidays and Administrative Leave (652.237-72), Contracting Officer's Representative (652.242-70), and Authorization and Performance (652.242- 73). The full text of any incorporated clause is available from the Contracting Officer on request.

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Exhibit A — HVAC Water Treatment System Summary The United States Embassy in Amman requires professional services and Contractor cost proposals to perform preventive maintenance of the facility's HVAC water-treatment systems. The Contractor shall provide all labor, tools, and materials to carry out preventive maintenance as outlined in this SOW; the Embassy may hold service manuals for the equipment, and where it does not, the Contractor shall assist Embassy staff in obtaining them.

Item Detail

Chilled water (primary & secondary) ≈ 90,000 L, closed loop, molybdate program, 30% propylene glycol

Condenser water / cooling towers ≈ 20,000 L, open loop, sequestrant + inhibitor + dual biocide, conductivity bleed-off

Heating hot water ≈ 50,000 L, closed loop, molybdate program

Chemical feed equipment (location: Plant Room) Control panel, chemical pot feeders, dosing pumps, agitator, chemical solution tank, valves & switches

Filtration Condenser side-stream sand filter; hot/chilled cartridge/bag media (98% @ 20 micron)

Test equipment pH/TDS/DO/chloride/alkalinity/hardness kit, conductivity meter, dip slides, 2-station (closed) & 4-station (open) coupon racks

Exhibit B — Potable (Domestic) Water Treatment System Summary The United States Embassy in Amman requires professional services and Contractor cost proposals to perform preventive maintenance of the facility's potable water-treatment system (≈ 260,000 L). The system is multi-barrier and designed to comply with U.S. EPA Primary and Secondary Drinking Water Regulations (40 CFR 141– 143).

Component Qty Location

Control panels — Plant Room, cistern tank, and UTL Building

Carbon (GAC) filters 2 Plant Room

Cartridge filters 6 Plant Room

Softeners 2 Plant Room

Chlorination / pH adjustment / corrosion inhibitor — Plant Room

Raw water storage — Below ground — Plant Room

Finished / treated water storage — Below ground — Plant Room

UTL Building water storage — Above ground — UTL Building

Pumps (cistern, booster, transfer, chemical dosing) — Plant Room / as installed

Wells & submersible pump(s) As present Verify during survey

Exhibit C — Swimming Pool Water Treatment System Summary The compound swimming pool(s) shall be maintained for sanitizer/pH control, water clarity, bather safety, and equipment protection. The Contractor shall verify the installed configuration during the survey.

Rev. 1.0 — Aug 2026 Page 17 of 18

Component Detail

Recirculation & filtration Circulation pump(s), strainer, cartridge filter(s)

Automated chemical dosing Chlorine and pH (acid) feed with controller; verify calibration & feed rates

Salt chlorination (if installed) Salt cell / generator; verify salinity and output

Heater Pool heater; verify operation

Target chemistry Free chlorine ≈ 0.6 mg/L, pH ≈ 7.2; balanced alkalinity/hardness/CYA per code & COR

Consumables / test kit Sanitizer, pH chemicals, reagents/test kit on hand

Exhibit D — Consolidated Control Parameters

HVAC

Parameter Closed Systems Condenser / Open pH 7.0 – 10.0 6.5 – 8.5

Molybdate — chilled / heating 50–100 / 100–150 ppm 4 – 10 ppm

Corrosion — mild steel < 1.0 mpy < 2.0 mpy

Corrosion — copper < 0.1 mpy < 0.2 mpy

Scale / pitting None None

Aerobic count < 10,000/mL Controlled by biocide

Potable

Parameter Target

Free chlorine residual 0.2 – 0.5 mg/L (all distribution)

Regulatory compliance 40 CFR 141–143 (EPA Primary & Secondary)

Corrosion — mild steel / copper < 2.0 mpy / < 0.2 mpy

HPC (microbiological fouling) < 500 CFU/mL; no visible deposits; no health hazard

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Exhibit E — Contractor Site-Verification Checklist (to accompany the Baseline Report) The Contractor shall complete and return this checklist with the Baseline Report to confirm the as-found configuration and reconcile any deviation from Section 2 with the COR.

Item to Verify Confirmed Deviation Noted

Chilled-water loop volume & glycol %

Heating-hot-water loop volume

Condenser-water volume; number of cooling-tower cells

Closed-loop inhibitor feed points & bypass feeders

Condenser controller (conductivity / inhibitor / biocide) operation

Coupon rack stations (closed = 2, open = 4)

Potable filtration counts (GAC / cartridge / softener)

Disinfection method & residual capability

Storage tanks (raw / finished / UTL) & access

Wells & submersible pumps present

Pool configuration (filter / dosing / salt / heater)

Existing logs, service manuals & SDS availability

END OF STATEMENT OF WORK

Exhibit E — Contractor Site-Verification Checklist (to accompany the Baseline Report)