Statement of Work.pdf

28 SEPTEMBER 2026

DISTRIBUTION STATEMENT A. Approved for public release.

Statement of Work for De-Ionized Water System Service

N00164-27-X-XXXX

1 SCOPE

1.1 The De-Ionized (DI) water system will take raw potable tap water (average hardness ≈ 50 ppm, heavily contaminated with dissolved and particulate iron and sediment) and perform filtration and ion exchange to produce DI water for delivery to a storage tank and recirculating system that supplies DI water to a printed circuit board plating shop and to an analytical laboratory adjacent to the plating shop. A separate, smaller system will perform ion exchange to produce DI water for delivery to a printed circuit board batch cleaner system.

2 GENERAL REQUIREMENTS

3 SPECIFIC REQUIREMENTS

3.1 The 3.6 cubic feet system

3.1.1 The system shall deliver water to a 500 gallon HDPE storage tank used to supply the plating shop at a quality level that meets or exceeds the following specifications:*

3.1.1.1 Electrical conductivity shall be 0.25 µS/cm maximum at 25 °C.

3.1.1.2 Electrical resistivity shall be 4.0 MΩ-cm minimum at 25 °C.

3.1.1.3 The pH shall be a minimum of 5 and a maximum of 8.

3.1.1.4 Total organic carbon shall be a maximum of 200 µg/L.

3.1.1.5 Sodium shall be 10 µg/L maximum.

3.1.1.6 Chlorides shall be 10 µg/L maximum.

3.1.1.7 Total silica shall be 500 µg/L maximum.

3.1.1.8 Final filtration level shall be 10 µm minimum.

*These specifications are a modification of the requirements for ASTM Type III DI water.

See ASTM D1193-99 for details.

3.1.2 The system shall deliver water to the analytical control laboratory at a quality level that meets or exceeds the following specifications:*

3.1.2.1 Electrical conductivity shall be 0.10 µS/cm maximum at 25 °C.

3.1.2.2 Electrical resistivity shall be 10.0 MΩ-cm minimum at 25 °C.

3.1.2.3 The pH shall be a minimum of 5 and a maximum of 8.

3.1.2.4 Total organic carbon shall be a maximum of 200 µg/L.

3.1.2.5 Sodium shall be 10 µg/L maximum.

3.1.2.6 Chlorides shall be 10 µg/L maximum.

3.1.2.7 Total silica shall be 500 µg/L maximum.

3.1.2.8 Final filtration level shall be 10 µm minimum.

*These specifications are a modification of the requirements for ASTM Type III DI water.

See ASTM D1193-99 for details.

3.1.3 The system shall be of sufficient capacity and size to be capable of supplying DI water at the specified quality levels to the 500 gallon storage tank and the analytical control laboratory simultaneously.

3.1.4 The system shall consist of the following components:

3.1.4.1 A service DI unit which is leased from and remains the property of the selected

Contractor shall consist of:

3.1.4.1.1 Inlet filter to remove sediment and particulate iron from incoming tap water feed

3.1.4.1.2 Pressure regulator, if required, to reduce pressure as required by the system

3.1.4.1.3 Activated carbon filtration tank to remove chlorine and organics from tap water feed

3.1.4.1.4 Anion exchange column

3.1.4.1.5 Cation exchange column

3.1.4.1.6 Dual mixed bed anion cation exchange columns

3.1.4.1.7 Final filter, 5 micron recommended, 10 micron maximum

3.1.4.1.8 In-line product water quality monitoring device located near the outlet of the system

(typically a conductivity/resistivity meter) that is user selectable with water quality ranges from 20 KΩ to 10 MΩ.

3.1.4.1.9 See Figure 1 for typical design and layout

3.1.5 Plumbing Details

3.1.5.1 Inlet: Contractor shall provide any piping adaptations required to connect the system to the existing Tap Water In ¾” male threaded SCH80 PVC supply line.

3.1.5.1.1 Contractor shall provide all piping, tubing, and hardware connections within the system.

3.1.5.2 Outlet: Contractor shall provide any piping adaptations required to connect the system to the existing 1” female threaded SCH 80 PVC DI water distribution system.

3.1.6 Flow Rate

3.1.6.1 The system shall be able to continuously supply 8-10 gallons per minute at 30 psi of product water at the required purity level at the point of exit from the system until the system’s capability has been exhausted.

3.1.6.2 Flow rates into the DI storage tank and to the analytical laboratory shall not fall to less than 2-4 gallons per minute at 15-20 psi even if both the storage tank and laboratory are simultaneously demanding water from the system.

3.1.7 Footprint

3.1.7.1 The system shall not occupy more than 30 square feet, 10 feet by 3 feet, of floor space.

3.1.7.2 Wall mounted pressure regulators, filtration units, and flow meters are acceptable but all mounting brackets, reinforcements, special enclosures, and/or mounting hardware or modifications to the system to permit wall mounting shall be the Contractor’s responsibility.

3.1.8 Regeneration and System Maintenance

3.1.8.1 Contractor shall replace inlet and outlet filters quarterly or as required to maintain the minimum flow rates and water quality specified herein.

3.1.8.2 Replacement of activated carbon tank shall be performed semi-annually and regeneration of anion, cation, and mixed bed ion exchange columns shall be performed at least quarterly or more frequently if needed to maintain product water quality.

3.1.8.3 All regeneration operations, including all operations involving the use or disposal of hazardous materials shall be conducted off-site and shall be the Contractor’s exclusive responsibility.

3.1.8.4 Contractor shall have and maintain a 24 hour-a-day, 7-day-a-week, emergency service number.

3.1.8.5 Contractor shall respond to a service request within 24 hours after notification by the

Government that the system requires service or is producing water of insufficient purity.

3.1.8.6 Contractor shall maintain a sufficient inventory of replacement and spare parts to return system operation should the system fail to operate properly or require service.

3.2 The 1.2 cubic feet system

3.2.1 The system shall deliver water to a 40 gallon water heater used to supply a printed circuit card assembly batch cleaner system.

3.2.1.1 A DI unit which is leased from and remains the property of the selected Contractor shall consist of:

3.2.1.2 A 1.2 cubic feet mixed bed anion cation exchange column

3.2.1.3 In-line product water quality monitoring device located near the outlet of the system

(typically a conductivity/resistivity meter) that is user selectable with water quality ranges from 20 KΩ to 10 MΩ.

3.2.2 Plumbing Details

3.2.2.1 Inlet: Contractor shall provide any piping adaptations required to connect the system to the existing Tap Water In ¾” male threaded SCH80 PVC supply line.

3.2.2.2 Outlet: Contractor shall provide any piping adaptations required to connect the system to the existing ¾” female threaded SCH 80 PVC supply line to the water heater.

3.2.3 Regeneration and System Maintenance

3.2.3.1 Replacement of mixed bed ion exchange column shall be performed quarterly or as required to maintain minimum product water quality.

3.2.3.2 All regeneration operations, including all operations involving the use or disposal of hazardous materials shall be conducted off-site and shall be the Contractor’s exclusive responsibility.

3.2.3.3 Contractor shall have and maintain a 24 hour-a-day, 7-day-a-week, emergency service number.

3.2.3.4 Contractor shall respond to a service request within 24 hours after notification by the

Government that the system requires service or is producing water of insufficient purity.

3.2.3.5 Contractor shall maintain a sufficient inventory of replacement and spare parts to return system operation should the system fail to operate properly or require service.

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