Attachment 1 - PWS B304 Cooling Tower Repairs - 1-29-2026.docx

Performance Work Statement Project Title: B304 Cooling Tower Repairs 2026 NexGen Work Task #: 17154995

1. Objectives:

The Contractor shall procure and provide two new cooling tower fan motors, including any associated hardware kits for motor connection at Tower #1 & 3. The motor wiring for Tower #1 and its motor cooling fan shall also be replaced. Additional miscellaneous repairs shall be accomplished per project requirements as listed below.

2. Conditions:

The three active towers are three cells, two of which are joined (Evapco S/N 4-108197-8198 refers to the entire installation of three towers), and are rated at 2400 ton and 7200 gpm. The two joined towers are model REP224-920 (two cell type of 1600 ton and 34,800 cfm). The third cell is an extra joined single cell of this model. The existing tower motors are 60 hp, 2-speed, 1-winding, 3 phase, 460 VAC units.

The existing motors for tower fan #1 & 3 are deficient and the Tower #3 fan is inoperable. The motor wiring in Tower #1 is deteriorated and hanging loose, creating a potential arc/short hazard. Bits of the cooling fan for motor #1 are also broken off and laying beneath the motor. Several leaks exist.

3. Project Requirements

· The Contractor shall visit site before starting any work to verify existing conditions space requirements in work areas.

· The Contractor shall abide by FAA notice and Airfield coordination requirements for any crane use.

· The Contractor shall coordinate with the Government for system operation to allow the work and testing. Two week notice is required for outages.

· The Contractor shall provide all required Lock-Out-Tag-Out work and equipment.

· The Contractor shall remove the tower fan guard and fan blade on tower 1 & 3 and shall replace the fan motor on each tower. On each tower the Contractor shall align the shaft and motor connections, and provide any hardware or kit equipment required for motor mounting and motor connections to the fan shafts.

· The Contractor shall provide and install a new motor cooling fan for the motor on Tower #1.

· The Contractor shall reinstall the fan guards and shall balance the fans of Tower 1 & 3 for full operational function.

· The Contractor shall provide electrical and control connections to the new motors.

· The Contractor shall clean the spray nozzles on all three towers.

· The Contractor shall repair the leaks at the sump basin sensors on the west side.

· The Contractor shall seal the sump basin leaks at the connection points between the conjoined towers, and the small sump basin leak on Tower #2 north side.

· The Contractor shall repair the damaged drift eliminator mounting rails on west side of the towers to allow proper mounting of the drift eliminator media, and shall re-install the drift eliminator media panels that have become displaced.

· The Contractor shall repair the leaks (by replacing the piping and insulation as needed) on the 4” sump drain piping on the east side of the Towers.

· The Contractor shall check and top up transmission fluid for the tower fans as needed.

· The Contractor shall provide start up testing to prove satisfactory installation and capability of the new equipment.

· The Contractor shall provide at least a 1-year warranty on all labor and new materials.

· The Contractor shall clean up and dispose of all removed equipment and project waste from the replacements, as well as any trash generated from the work. Refuse shall be disposed of off-Base in accordance with Offutt AFB Environmental Special Conditions section 01 57 19.

4. Other General Requirements:

The contractor shall furnish all material, labor, transportation, equipment, tools, services, expertise, supervision, and incidentals required to fulfill the requirements of this contract. No alterations, additions, or deletions shall be made unless by prior approval of the government Project Manager and the government Procuring Contract Officer (PCO). The work shall conform to the most current applicable State, AFI, ETL, NFPA, and Unified Facility Criteria Standards. Work shall be completed in a neat, substantial, and competent manner. All personnel shall abide by all industry safety standards, such as OSHA, and the Contractor shall provide all required PPE. The contractor shall perform quality assurance activities that conform to the quality assurance processes outlined in International organization of Standards (ISO) 9001, Quality Management Systems. The Contractor shall use PWS requirements.

The Contractor shall coordinate with the Government for needed system operation to allow the work and subsequent testing on the pump. The Contractor shall provide their own lock-out-tag-outs as needed.

During construction the Government will occupy the existing facilities. The contractor shall not restrict nearby pedestrian or vehicular traffic and shall coordinate with the Contracting Officer’s Representatives to facilitate usage. The Contracting Officer’s Representatives shall be notified not less than 15 calendar days in advance of any interruptions in building utilities / services, which will be described in writing.