PWS - JDA Spare GSU Bushing Install and Transformer Testing_Final Review.pdf

Performance Work Statement (PWS) for the

John Day Dam, Spare Transformer Bushing Install and Transformer Testing Sherman County, Oregon

1 INTRODUCTION

The US Army Corps of Engineers – Portland District has a requirement to solicit non-personal services to include the install of government furnished bushings on a spare 500kV shell-form single-phase Westinghouse generator step-up (GSU) transformer and related electrical testing. This requirement also includes furnishing and installing bottom terminals for the government-furnished high-voltage and low-voltage bushings as well as other ancillary materials described herein. All work must be in accordance with the details provided in this Performance of Work Statement (PWS) and comply with all local, state, and federal regulations.

2 LOCATION

John Day Lock & Dam is located 216 miles upriver from the mouth of the Columbia River near the city of Rufus, Oregon. See Attachment A – Site Location, for location details.

3 PERIOD OF PERFORMANCE

All work under this contract must be completed within 365 calendar days of award.

4 EXISTING CONDITIONS

The existing spare GSU transformer has been stored at its current location between GSU Transformer Banks T3 and T4 on the intake deck (elevation 281) since 1978. Site specific photos including the transformer name plate are included in Attachment B.

Serial# 7000893 Rating 164MVA/218MVA Oil Capacity 15539 Gal

4.1 Transformer Conditions

The spare GSU transformer does not have the following components installed:

High-voltage (HV) bushing HV neutral bushing Low-voltage (LV) bushings LV bushing housings Radiators Fans Temperature indicators

The scope of this PWS does not include work within the control cabinet. Minimize disturbance of the control cabinet to fullest extent possible. Should disturbance be necessary, be aware the wiring insulation may contain asbestos in addition to the exterior of the control cabinet containing lead-based paint.

4.2 Electrical Power

No 480V 3-phase power is available near the spare transformer. Contractor is responsible for supplying power to their processing rig and trailer for the duration of this work.

4.3 Attachment List

The attachments listed below are provided:

Attachment A – Site Location Attachment B – Site Photos Attachment C – Existing transformer oil level Attachment D – Pictures of bottom terminals for bushings Attachment E – Drawing for HV bushing bottom terminal Attachment F – Drawing for HV bushing bottom shield Attachment G – Outline Drawings of the Hitachi HV, HV neutral and LV bushings

5 REFERENCES

Comply with applicable federal, state, local, and USACE standards, including:

a. EM-385-1-1 (2024)

b. 29 CFR 1926

c. Environmental Protection Agency (EPA)

d. Occupational Safety and Health Administration (OSHA)

e. American Society for Testing and Materials (ASTM)

f. Oregon Department of Environmental Quality (ODEQ)

g. Oregon Administrative Regulation (OAR)

h. ASME B1.1, Unified Inch Screw Threads (UN, UNR, and UNJ Thread Form)

i. ASME B1.20.1, Pipe Threads, General Purpose (Inch)

j. ASTM D923, Standard Practices for Sampling Electrical Insulating Liquids

k. ASTM D1305, Standard Specification for Electrical Insulating Paper and Paperboard—Sulfate (Kraft)

Layer Type

l. ASTM D3283, Standard Specification for Air as an Electrical Insulating Material

m. ASTM D3487, Standard Specification for Mineral Insulating Oil Used in Electrical Apparatus

n. ASTM F468, Standard Specification for Nonferrous Bolts, Hex Cap Screws, Socket Head Cap Screws, and Studs for General Use

o. IEEE C57.19.00, Standard General Requirements and Test Procedures for Outdoor Power Apparatus

Bushings

p. IEEE C57.19.01 Performance Characteristics and Dimensions for Power Transformer and Reactor

Bushings

q. IEEE C57.93, Guide for Installation and Maintenance of Liquid-Immersed Power Transformers

r. IEEE C57.106, Guide for Acceptance and Maintenance of Insulating Oil in Equipment

s. IEEE C57.149, Guide for the Application and Interpretation of Frequency Response Analysis for Oil-

Immersed Transformers

t. IEEE C57.152, Guide for Diagnostic Field Testing of Fluid-Filled Power Transformers, Regulators, and

Reactors

6 GOVERNMENT FURNISHED MATERIALS

The Government will furnish one (1) high-voltage (HV) bushing, one (1) high-voltage (HV) neutral bushing and four (4) low voltage bushings for installation on the spare transformer as part of this contract.

7 SCOPE OF WORK

7.1 Task 1 – Provide Mounting Hardware for the Bushings, CLIN 0001

Provide mounting hardware for one (1) HV bushing, one (1) HV neutral bushing and four (4) LV bushings in accordance with requirements listed in section 8.1. Provide product data prior to procuring materials.

Deliver the mounting hardware to John Day Lock and Dam prior to the start of Task 5 onsite work. Payment will be made for the procurement and delivery of the mounting hardware. Amount will be measured by job and based on COR inspection and confirmation of delivered materials.

7.2 Task 2 – Provide Gaskets for the Bushings, CLIN 0002

Provide gaskets for one (1) HV bushing and four (4) LV bushings in accordance with requirements listed in sections 8.1 and 8.1. Provide product data prior to procuring materials. Deliver the bushing gaskets to John Day Lock and Dam prior to the start of Task 5 onsite work. Payment will be made for the procurement of the bushing gaskets as specified in section 8.1. Amount will be measured by job and based on COR inspection and confirmation of delivered materials.

7.3 Task 3 – Provide Bottom Terminal, Bottom Shield, Drawings and Associated Mounting Hardware for the HV Bushing, CLIN 0003

Provide the bottom terminal, bottom shield and associated mounting hardware for the HV bushing and corresponding product data. Provide product data prior to procuring materials. Deliver the bottom terminal, bottom shield and associated mounting hardware to John Day Lock and Dam prior to the start of Task 5 onsite work. Payment will be made for the procurement of the bottom terminal, bottom shield and associated mounting hardware for the HV bushing. Amount will be measured by job and based on COR inspection and confirmation of delivered materials.

7.4 Task 4 – Provide Bottom Terminals, Drawings and Associated Mounting Hardware for Four (4) LV Bushings, CLIN 0004

Provide the bottom terminals and associated mounting hardware for four (4) LV bushings. Deliver the bottom terminals and associated mounting hardware to John Day Lock and Dam prior to the start of onsite work.

Payment will be made for the procurement of the bottom terminals and associated mounting hardware for the four (4) LV bushings. Amount will be measured by unit price and based on COR inspection and confirmation or delivered materials.

7.5 Task 5 – Drain Oil, Install Bushings, Perform Oil-filling, and Processing, and Perform Electrical Testing of the Spare Transformer, CLIN 0005

Provide all pre-work submittals as listed in Section 8 for government review and approval prior to the start of any onsite work. Provide all labor, equipment, materials, including mobilization and demobilization required to drain the oil, install new and government furnished bushings, perform oil-filling, and processing, and perform electrical testing of the spare transformer in accordance with the requirements of Clause 5, Liquid-immersed power transformers rated 10 MVA and above or with high-voltage windings 69 kV and above of IEEE C57.93 at John Day Lock and Dam. Payment will be made for completion of the work and submittal of the Final Spare GSU Report. Amount will be measured by job and based on Government inspection of the completion of requirements in PWS Sections 8 and 9.

8 SUBMITTALS

Submit the items specified herein in pdf format via email to the COR for approval within 30 calendar days of Contract Award. Submittals a. through f. must be approved prior to on-site work beginning. The Government review period will be 21 calendar days.

a. Product Data

1. Mounting Hardware for Bushings

2. LV Bushing Gaskets

3. HV Gasket

4. HV Bushing’s Bottom Terminal, Terminal Shield, and Associated Mounting Hardware

5. LV Bushing’s Bottom Terminals, and Associated Mounting Hardware

b. Work Plan

c. Accident Prevention Plan (APP) and Supplemental Plans

1. Standard Lift Plan

2. Critical Lift Plan

3. Hazardous Energy Control Program

4. Fall Protection and Prevention Plan

5. Confined Space Plan

6. Activity Hazard Analysis (AHA)

d. Project Schedule

e. Quality Control Plan (QCP)

f. Oil Containment Plan

g. QC Reports: 24 hours after completion of each workday

h. Final Spare GSU Report

8.1 Products

8.1.1 Mounting Hardware for Bushings

Submit product data for all bolts, studs, nuts, and tapped holes designed for customer connection in accordance with ASME B1.1 (inch fasteners). Bolting hardware must be Grade 8 minimum, or equivalent, and all hardware not internal to the tank must be galvanized. Threads for sizes 1/4-inch to 1-inch, inclusive, must be NC or UN series.

8.1.2 LV Bushing Gaskets

Submit product data for the LV bushing that meet the following requirements:

a. Meets the requirements of ASTM D-1418, designation FKM, Type 2.

b. Manufactured with 100% virgin FKM Fluoroelastomer polymer

c. Rated for application in temperature range of -20F to +400F

d. Durometer hardness of 70 (+/- 2)

e. Minimum fluorine content: 66%

f. Circular cross-section gaskets are not acceptable for use in gasket grooves of rectangular cross-section

8.1.3 HV Bushing Gasket

Submit product data for the HV bushing gasket that meet the following requirements:

a. Provide gaskets made of Nitrile NBR (Buna N) with a Durometer rating between 50 and 70.

b. Circular cross-section gaskets are not acceptable for use in gasket grooves of rectangular cross-section.

8.1.4 HV Bushing’s Bottom Terminal, Terminal Shield, and Associated Mounting Hardware

Submit product data for the HV bushing’s bottom terminal, terminal, and associated hardware that meets the following requirements:

a. Provide updated drawings showing material used for the bottom terminal.

b. Material certification showing that the bottom terminal was machined from copper alloy per item 3 of Westinghouse drawing 455C069 shown in Attachment E

c. Provide updated drawing specifying base material, insulating material and final dimensions for the bottom terminal shield that shows the item is properly insulated and conforms to the bottom shield detail shown in Westinghouse Drawing 763C055 shown in Attachment F

d. The silicon mounting hardware conform ASTM F468

8.1.5 LV Bushing’s Bottom Terminals, and Associated Mounting Hardware

Submit product data for the LV bushing’s bottom terminals, and associated hardware that meets the following requirements:

a. Provide drawings showing the dimensional and material requirements for the LV bushings bottom terminal as shown in Attachment D.

b. Material certification showing the bottom terminals are made from copper alloy

c. The silicon mounting hardware conform ASTM F468

8.2 Work Plan

Submit a work plan for Government approval. At minimum, include the following:

a. Provide resumes for all Required Personnel listed in Section 9.1.

b. Equipment list that includes make and model of equipment to be used for the work,

c. List of all employees who will be working on site to include prime and subcontractors,

d. Map of area and planned equipment staging and access,

e. Organization chart including subcontractors, number of workers onsite,

f. References to the QCP, and APP as appropriate. Break down work plan per performance objective tasks.

g. Outline the sequence of operations based on the requirements of IEEE C57.93, for the oil-draining, bushing installation, transformer oil-filling, and processing, electrical testing, and oil analysis of the spare GSU transformer at the John Day Lock and Dam as documented in the technical requirements of section 9 of this PWS.

8.3 Accident Prevention Plan

a. A qualified person must prepare the written site-specific APP. Submit the APP in accordance with the format and requirements of EM 385-1-1, Appendix A, and as supplemented herein. Follow the mandatory ENG Form 6293 (Accident Prevention Plan Worksheet) to ensure all required elements are captured.

https://www.publications.usace.army.mil/LinkClick.aspx?fileticket=LmW_eJDoLpI%3d&tabid=164 38&portalid=76&mid=43543

b. If an item on ENG Form 6293 is not applicable because of the nature of the work to be performed, state this exception and provide a justification.

c. The APP must be job-specific and must address any unusual or unique aspects of the project or activity for which it is written. General corporate-level safety and health programs are not considered job or work-site specific. Include required elements listed in the below subsections as part of the APP.

d. On site work cannot proceed without a Government-approved APP.

e. Once approved, the APP and appendices will be enforced as part of the Contract. Disregarding the provisions of this Contract or the Government-accepted APP will be cause for stoppage of work, until the matter has been rectified.

f. Once work begins, changes to the APP must be made with the knowledge and concurrence of the COR, Project Superintendent, SSHO, and Quality Control Manager. Should any severe hazard exposure, become evident, stop work in the area, secure the area, and develop a plan to remove the exposure and control the hazard. Notify the COR both verbally and in writing, within 24 hours of discovery. In the interim all necessary action must be taken by the Contractor to restore and maintain safe working conditions in order to safeguard on-site personnel, visitors, the public (as defined by ASSE/SAFE A10.34), and the environment.

g. Copies of the APP must be maintained at the work site. Continuously review and amend the APP, as necessary, throughout the life of the Contract. Incorporate unusual or high-hazard activities not identified in the original APP in the plan as they are discovered.

8.3.1 Standard Lift Plan (SLP)

Plan lifts to avoid situations where the operator cannot maintain safe control of the lift. Prepare a written SLP in accordance with EM 385-1-1, Section 16.A.03, using Form 16-2 for every lift or series of lifts (if duty cycle or routine lifts are being performed). The SLP must be developed, reviewed and accepted by all personnel involved in the lift in conjunction with the associated AHA. Signature on the AHA constitutes acceptance of the plan. Maintain the SLP on the LHE for the current lift(s) being made. Maintain historical SLPs for a minimum of 3 months.

8.3.2 Critical Lift Plan – Crane or Load Handling Equipment

Provide a Critical Lift Plan as required by EM 385-1-1, Section 16, using Form 16-3. Critical lifts require detailed planning and additional or unusual safety precautions. Develop and submit a critical lift plan 30 calendar days prior to critical lift. Comply with load testing requirements in accordance with EM 385-1-1, Section 16.F.03. In addition to the requirements of EM 385-1-1, Section 16, the critical lift plan must include the following:

a. For lifts of personnel, demonstrate compliance with the requirements of 29 CFR 1926.1400 and EM 385-1-1, Section 16.T.

b. Multi-purpose machines, material handling equipment, and equipment used to lift loads that are suspended by rigging gear, require proof of authorization from the machine OEM that the machine is capable of making lifts of loads suspended by rigging equipment. Demonstrate that the operator is properly trained and that the equipment is properly configured to make such lifts and is equipped with a load chart.

8.3.3 Hazardous Energy Control Plan and HEC Procedures Training Certification

a. Provide annual Hazardous Energy Control Plan and Procedure Affected Person (AP) training to all Contractor and subcontractor personnel working under, or in the vicinity of, clearances as defined in

CENWP-OD-SAF-385-1.

b. All costs for this training shall be considered incidental to the work, and therefore, no additional payment will be made. Cost for the training is approximately $55 per individual. Training is provided by Vivid Learning Systems and is available online at http://contractor.vividlms.com/.

c. Submit the training completion certification a minimum of seven days prior to the individuals arrival at site. Maintain training documentation on site, including the individual's name and date of training completion, in accordance with CENWP-OD-SAF-385-1.

8.3.4 Fall Protection and Prevention (FP&P) Plan

Provide a FP7P plan that complys with the requirements of EM 385-1-1, Section 21.D and ASSE/SAFE Z359.2, be site specific, and address all fall hazards in the workplace and during different phases of work.

Address how to protect and prevent workers from falling to lower levels when they are exposed to fall hazards above 1.8 m 6 feet. A competent person or qualified person for fall protection must prepare and sign the plan documentation. Include fall protection and prevention systems, equipment and methods employed for every phase of work, roles and responsibilities, assisted rescue, self-rescue and evacuation procedures, training requirements, and monitoring methods. Review and revise, as necessary, the Fall Protection and Prevention Plan documentation as conditions change, butat a minimum every six months, for lengthy projects, reflecting any changes during the course of work due to changes in personnel, equipment, systems or work habits. Keep and maintain the accepted Fall Protection and Prevention Plan documentation at the job site for the duration of the project. Include the Fall Protection and Prevention Plan documentation in the Accident Prevention Plan (APP).

8.3.5 Confined Space Plan

Provide a confined space plan that meets the requirements of EM 385-1-1, Chapter 34. Include the name and qualifications of the competent person within the plan.

8.3.6 Activity Hazard Analysis

Prepare a Job Safety Analysis, also known as Activity Hazard Analysis (AHA), in accordance with EM-385- 1-1 and submit as part of the Accident Prevention Plan for approval by the COR prior to initiation of the work tasks.

8.4 Project Schedule

Submit a Project Schedule that includes the below activities at a minimum:

a. Order and delivery of items listed in Task 1-4.

b. Pre-work submittal required for Task 5.

c. Mobilization

d. Target work window

e. Anticipated start and end dates for work under each activity for Task 5.

f. Demobilization

g. Delivery of Final Spare GSU Report

8.5 Quality Control Plan

Submit the Quality Control Plan (QCP) for Government acceptance. Identify the Quality Control Manager in the plan. On site work cannot begin until the QCP has been accepted. Include procedures for establishing and maintaining the tool and part accountability plan per Section 9.9. The Contractor, not the Government is responsible for quality control actions necessary to meet the quality standards set forth by the contract.

8.6 Oil Containment Plan

Submit an oil containment plan that meeting the requirements of Section 9.2 and 9.3 and includes product data for the oil containment berms manufactured from a reinforced geomembrane of a minimum 30 mil thickness and are chemically resistant to transformer oil and has supported collapsible walls.

8.7 Daily QC Reports

Document work progress with daily QC Reports. Provide CQM reviewed and signed daily operations reports via email in PDF format to the COR, showing daily and cumulative progress. Reports will include personnel onsite, hours worked, area of work, type of work, for the days work. Include copies of the Tools and Parts

Control Check list for days that work was performed inside the transformer tank. Include in reports photographs of daily progress. Submit daily QC reports within 24 hours for Government acceptance.

8.8 Final Spare GSU Report

After all inspection and testing is complete provide a final report documenting the following:

a. Findings of any abnormalities noted during installation of the bushings;

b. Findings of any abnormalities noted during the DETC inspection if accessible;

c. GSU Test results and any abnormalities.

9 TECHNICAL REQUIREMENTS

9.1 Contractor Required Personnel

The Contractor Quality Control Manager and Site Safety Health Officer may be the same individual. If any qualification requirements conflict, the most stringent requirement applies.

9.1.1 Site Safety and Health Officer (SSHO)

The SSHO must meet the requirements of EM 385-1-1 chapter 2 and ensure that the requirements of 29 CFR

1926.16 are met for the project. Provide a Safety oversight team that includes a minimum of one (1) person at the project site to function as the Site Safety and Health Officer (SSHO). The SSHO or an equally qualified Designated Representative/alternate must be at the work site at all times to implement and administer the Contractor's safety program and Government-accepted Accident Prevention Plan. The SSHO's training, experience, and qualifications must be as required by EM 385-1-1 paragraph 2-2.x.(3), entitled Level 1

SSHO.

Provide a Competent Person on-site at all times when the work that presents the hazards associated with their professional expertise is being performed for all of the hazards identified in the Contractor's Safety and Health Program in accordance with the accepted Accident Prevention Plan. Provide the credentials of the Competent Person(s) to the COR.

Site Safety and Health Officer (SSHO) must be employed by the Prime Contractor. Provide a SSHO meeting the following requirements:

a. A minimum of 3 years safety work on similar project.

b. 30-hour OSHA construction safety class or equivalent within last 3 years.

c. Competent person training as needed including designation and qualification to be a "competent person" in accordance with 29 CFR 1926.

9.1.2 Contractor Quality Manager (CQM)

Identify an individual who is responsible for overall management of CQC. Authorize the individual to act in all CQC matters for the Contractor, including stoppage of work and removal of noncomplying work. The CQC System Manager must be on the site at all times during Task 5 including during the work of any subcontractors.

9.1.3 Field Supervisor

Identify an individual who is responsible for overall full field supervision. This individual must have participated in the assembly, oil-filling, and testing of similar power transformers in at least five projects over the past ten years, including at least one 500kV transformer. Their resume must demonstrate experience with each applicable project by listing at a minimum, scope of work, contract details, and their role in each project. The Field Supervisor must be on the site at all times during Task 5 including during the work of any subcontractors.

9.1.4 Test Engineer

Identify an individual who is responsible for performing the on-site duties of the test engineer. The test engineer must have a minimum five years’ experience in performing electrical testing of Class II oil-filled GSU transformers of comparable type and complexity as the John Day spare GSU transformer.

9.2 Oil Containment System

Provide an oil containment system under the oil processing rig, oil storage tank(s), generators, and other petroleum powered equipment, and refueling truck sized to completely surround the equipment for the duration of this work. During the oil handling operations, all hose joints located outside of the oil containment system must have interlocking connections, be wrapped with an absorbent material, with container located beneath the joint to avoid oil spills. Place ground mats under the containment berms to protect them from damage.

9.3 Insulated Oil Storage Tank

Contain drained transformer oil in a clean, insulated closed top oil storage tank both capable and appropriate for storage of the transformer oil. Tank must be a double walled frac tank unless otherwise approved with the interior walls lined with a chemical resistant coating. Tank must have documentation of a passed a 3psi air pressure leak test and been cleaned with caustic wash or similar within 30 days of onsite work. Coordinate with the Government for the placement and inspection of the storage tank prior to filling with oil. Do not move tank when the tank is filled with oil.

9.4 Dry Air

Dry-air provided in cylinders must be in accordance with ASTM D3283, Type I. For dry-air that is provided by an air compressor with a dryer, the system must include or be capable of:

a. Desiccant system on the output of the compressor designed for removal of dirt, water, oil and uncondensed moisture from compressed air lines.

b. Maintain a maximum -40 degrees Fahrenheit dew point, while achieving a 0 percent compressed air humidity.

c. Coalesce that removes oil and sub-micron particles down to 0.01 microns.

d. Filter that provides removal of water and contaminants down to 5 microns.

e. Provide a filtration capacity up to 30 cubic feet per minute (CFM) at 175 pounds per square inch

(psi).

f. Replaceable or regenerative desiccant system which provides indication of silica gel saturation.

9.5 Working Inside the Transformer Tank

a. Clean and vacuum the top of the transformer tank prior to the removal of any tank man-hole covers to minimize the possibility of contaminants entering the tank.

b. Monitor the temperature and relative humidity around the transformer while tank is open. Do not open the tank if it is raining, the temperature drops below the dewpoint, or if there are signs of external condensation on the tank surfaces.

c. Anytime the transformer take internals are exposed to the atmosphere, continuously purge with dry-air at a maximum dew point of -40 degrees Fahrenheit introduced at lower filter value at a flow rate no less than 9.5 cubic feet per minute.

d. Purge the tank with dry-air until analysis of the gas in the transformer indicates at least 19.5 percent oxygen, prior to personnel entry.

e. Personnel must remove all personal items from their person prior to entering the transformer tank.

f. Personnel entering the transformer tank must wear Tyvek suits, or equivalent.

g. Cover all openings to the transformer tank whenever possible to prevent any falling objects from entering the tank.

h. Re-sealed and pressurized the tank with 2.5 psi of dry-air at the end of each working day.

9.6 Torque Requirements

Torque all bolted connections to the manufacturer's recommendations, and indicated with a permanent marker on every connection that the torquing process has been performed.

9.7 Pre-impregnated Electrical-Grade Insulating Kraft Paper

Pre-impregnated electrical grade insulation kraft paper must conform to the following requirements:

a. ASTM D1305;

b. Thermally upgraded; cellulose-based; and derived from unbleached, softwood pulp;

c. Chemically neutral, with low ash, chloride, and sulfate content;

d. Made specifically for the use of insulating conductors in oil-filled power transformers.

9.8 Lead bracing, Insulating Board, and Spacers

Lead bracing, insulated boards, and spacers must conform to the following requirements:

a. ASTM D1305;

b. Manufactured of electrical grade, cellulose-based materials derived from unbleached, softwood pulp;

c. Chemically neutral with low ash, chloride and sulfate content;

d. Specifically for the use inside oil filled power transformers;

e. Materials must be dried and pre-impregnated, as applicable.

9.9 Tools and Parts Control and Accountability

Maintain a log to ensure all tools and parts control and accountability program is necessary for the Spare GSU transformer to ensure that foreign objects are not left within the transformer tank during internal inspections and transformer reassembly work. At the end of each shift, and prior to resealing of the transformer tank, account for all tools and parts identified on the checklist and inspect the interior of the transformer tank for any loose tools or parts. Include a copy of the Tools and Parts Control Checklist to the daily QC report whenever work is being performed within the transformer tank, or when the transformer tank is open.

9.10 Dew Point

Perform a dew point check and determine the insulation moisture content as required in section 9.11 Draining Procedure, and 9.14.1 in this document. The Government QA Representative must witness the testing. The dew point checks must be performed per the methods of IEEE C57.93, Annex C Determination of Insulation Dryness. If the moisture content is greater than 1.0 percent of the dry weight of insulation, perform field drying of the windings using Method 2 - high vacuum with hot oil circulation in accordance with IEEE C57.93.

9.11 Draining Procedure

a. Secure the nitrogen feed to the spare GSU transformer.

b. Vent the transformer and connect dry-air to the transformer tank.

c. Drain the oil from the transformer into the insulating oil storage tank. During the draining process, displace the oil with dry-air with a pressure not to exceed 5psi.

d. After the transformer has been drained and filled with dry-air for 24 hours, perform a dew point check and determine the insulation moisture content per Section 9.11, Dew Point of this document.

9.12 Deenergized Tap Changer Inspection

The drawings do not specify the exact location of the switch contacts. Once inside the transformer take, if accessible, inspect the DETC for damage. Determine if the DETC can be rotated and document its condition.

9.13 Bushing Installation

Thoroughly clean and vacuum the flange and area surrounding the flange prior to unbolting any flanged connections to minimize the possibility of contaminants entering the tank. Remove and dispose of the existing gaskets. Use a vacuum to clean the grooves to prevent any gasket material from entering the tank and thoroughly clean all grooves with a clean lint free cloth after vacuuming.

9.13.1 High Voltage (HV)

Install and connect the HV bushing, gasket, bottom terminal, terminal shield, and all associated mounting hardware. Use pre-impregnated electrical-grade insulating kraft paper meeting requirements in section 9.7, lacing, as needed to install the bushing and insulate the bushing terminals. Torque all connections per section 9.6.

9.13.2 High Voltage (HV) Neutral

Install HV neutral bushing, gasket and mounting hardware. Torque all connections per section 9.6.

9.13.3 Low Voltage (LV)

Install LV bushings, gaskets, bottom terminals, and all associated mounting hardware. Torque all connections per section 9.6.

9.14 Refill and Process the Transformer Oil

Refill and process the transformer oil per the requirements of the "Liquid-immersed power transformers rated 10 MVA and above or with high-voltage windings 69 kV and above" section of IEEE C57.93 and as specified herein.

9.14.1 Preparation

After the transformer bushings have been installed, but prior to oil-filling, perform a perform dew point check per the requirements of section 9.12. Verify that all bolted connections have been torque checked prior to performing a tank pressure test. Pressure test the transformer by pressurizing the tank with 4 psi of dry-air that meets the requirements of section 9.9. When the tank reaches 4 psi, isolate the dry air. The gauge used for monitoring tank pressure must have a pressure range of 0-10 psi. Take into consideration ambient temperatures changes when comparing the pressure readings.

The tank must hold pressure for the entire test duration without leakage. If any leaks are detected, they must be resolved prior to proceeding to vacuum treatment.

9.14.2 Vacuum Treatment

Determine the minimum core and coil temperature before the start of the vacuum treatment. The core and coil temperature must be greater than 10 degrees Celsius. If required, provide core and coil heating using hot oil circulation until the core and coil temperatures are greater than 10 degrees Celsius.

Ensure that all devices which are not suitable for vacuum, as identified by the manufacturer, have been isolated from the transformer tank. Perform a vacuum leak test in accordance with paragraph Vacuum Leak Tests of IEEE C57.93 using Method A to assure there are no bad gasketed connections or loose bolting hardware. The maximum allowable leak rate is 150 mmHgL/min.

After an acceptable leak rate has been achieved, hold the transformer at a minimum vacuum of 1000 microns Hg for 60 hours as specified in Table 1 of IEEE C57.93. During this period, hot oil may be introduced to aid in heating the windings for moisture removal, then drained to allow for moisture removal using vacuum. Do not allow the temperature of the oil entering the transformer to exceed 70 degrees Celsius, to help minimize degradation of the insulation system during the oil circulation.

9.14.3 Vacuum-Filling

After vacuum treatment, handle the oil from the storage tank to the transformer via a high-vacuum purifier.

The complete transformer must be vacuum-filled with hot oil, at a temperature between 55-60°C and at a flow rate between 20-25 gpm, in a continuous operation.

Do not allow the temperature of the oil entering the transformer to exceed 70°C, to help avoid degradation of the insulation system during this process. When the filling process is complete, break vacuum. Perform oil circulation and moisture removal by using the oil processing equipment, circulate a minimum of two full volume passes of heated oil to aid in moisture removal.

9.14.4 Sampling

After the transformer oil filling and processing has been completed, collect a sample of the insulating oil from each transformer in accordance with ASTM D 923 and send to a certified lab to perform the following analysis:

a. Dissolved gases

b. Water content

c. Power factor at 25°C and 100°C

d. Color/Visual

e. Interfacial tension

f. Dielectric breakdown voltage per D1816

g. Neutralization number

h. Inhibitor content

Wait 72 hours per Table 5 of IEEE C57.93, after the completion of oil filling in order to allow the insulating liquid to absorb residual gas and thoroughly impregnate the insulation.

9.14.5 Transformer Tests

Perform the following transformer tests in accordance with IEEE C57.93:

a. Winding Insulation Resistance

b. Winding Insulation Power Factor Test

c. Bushing Insulation Power Factor Test

d. Single Phase Excitation Tests

e. Transformer Turns Ratio Test (If determined the DETC condition is acceptable)

f. Winding Resistance Measurement Test

g. Leakage Reactance Measurement Tests

h. Sweep Frequency Response Analysis Test in accordance with IEEE C57.149 with the DETC in the normal operating position.

10 PERFORMANCE REQUIREMENTS SUMMARY

The Performance Requirements Summary determines if the Contractor meets the performance standards of the contract, as well as provides guidelines for how and when surveillance will be performed. It ensures timeliness, effectiveness, and that the Contractor is delivering the results specified in the contract.

Government contract quality assurance will be performed at such times and/or places as may be necessary to determine the services conform to contract requirements.

Below are the criteria against which the performance will be evaluated. Work will be considered deficient if the following conditions are not in accordance with the following requirements.

Performance Objective (PO)

PWS

Paragraph Performance

Threshold Method of

Surveillance

Task 5 – Drain Oil, Install Bushings, Perform Oil-filling, and Processing, and Perform Electrical Testing of the Spare Transformer

7.5 Pass 100% Inspection, Customer

Complaint Fail

10.1 Surveillance

Contract performance will be assessed through customer or public feedback, and/or other 100% inspection means to assure the Government that the work specified under the contract is completed satisfactorily. The KO or COR must inspect by validating actual work performance, physically checking an attribute of the completed task, checking management information reports, investigating customer or public complaints, conferring with Project Staff, or otherwise inspecting the task or its results to determine whether performance meets the standards.

a. Customer or Public Complaints: The COR must perform inspections as necessary to address customer or public complaints.

b. 100% Inspection: This is an inspection method whereby all work activities are monitored.

The Government reserves the right under the Contract Terms and Conditions--Commercial Items (FAR 52.212-4) to inspect and test the services called for by the contract, to the extent practicable at all times and places during the term of the contract. If the COR discovers deficiencies and/or receives complaints, the COR will alert the Contractor for correction. Non-conforming services shall be rejected.

11 CONTRACT ADMINISTRATION

11.1 Prework Conference

A prework conference will be coordinated between COR and Contractor within 45 calendar days after Contract Award to discuss prework submittals, personnel, scheduling, and review contract requirements.

11.2 Project Coordination

Coordinate project activities and resolve critical issues in a timely manner with COR. Notify the COR at least 2 workdays, excluding weekends and federal holidays, prior to start of work under each task and within 2 workdays of completion of work of each task.

11.3 Project Access

a. Access to the site will be from the Oregon side via I-84, Exit 109.

b. Coordinate access through COR at least 14 days in advance of mobilization.

c. Arrangement and scheduling of working hours and crews is limited to one shift, weekday operations and must be coordinated through the COR. Working hours that extend past 5:00 p.m. weekdays or on weekends and federal holidays must be coordinated ahead of time through the COR. Submit the intended working hours of staff on site and identify any employees working in any capacity.

d. Security of the Contractor's property and items furnished under this Contract are the Contractor's responsibility.

e. All Contractor and subcontractor personnel must comply with the John Day Dam Project security policies and procedures.

f. John Day Dam is not open to the public. Security gates are locked and the Oregon access gate is manned at all times. Certain internal gates are locked at all times and require approved access to pass through.

After crossing through any gate that is locked and unattended, all personnel are required to wait for the gate to close before proceeding. Notify the Control Room if the gate fails to close.

g. Salespersons or personnel seeking employment will not be permitted inside the Project. Costs associated with Contractor failure to comply with the Project security policies must be at the expense of the Contractor.

h. Contractor's employee private vehicle parking areas must be restricted to the area as agreed upon before onsite work. All Contractor vehicles used for prosecuting the work must have a Contractor sign or other permanent identification and must carry the required insurance. Private vehicles not owned by the Prime Contractor or subcontractors must not be used for prosecuting the work. Private vehicles of the Contractor and its employees must enter and leave the project as directed. Keep the parking areas free of litter and debris. An adequate number and size of trash receptacles must be placed in the parking areas and emptied, as necessary to avoid overflowing. Trash receptacles must be adequately secured to provide protection from the wind and animals.

i. Provide Government personnel access to the top of the transformer for installing bushings, installing vacuum and oil hoses, etc. for the duration of this work.

11.4 Safety

Conform to all safety standards of the most recent edition of the Corps Safety and Health Requirements Manual EM-385-1-1 (2024).

11.4.1 Tools and Equipment

All tools and equipment shall have manufacturer's recommended safety protective devices to ensure worker safety at all times. Inspect tools and equipment daily by the Contractor and maintained in good working condition. Ensure all workers are properly trained to operate tools and equipment using safe practices.

11.4.2 Accident or Mishap Reports

a. All accidents involving property damage, fires, personal equipment, and all injuries to the public, regardless of degree, must be reported to the KO and on ENG Form 3394 and according to the schedule which follows:

b. Investigation and Reporting

1) Conduct a mishap investigation for recordable injuries and illnesses, for Medical Treatment, property damage accidents resulting in at least $5,000 in damages, and near misses as defined in EM 385-1-1, to establish the root cause(s) of the accident. Complete the accident or mishap reports form, ENG Form 3394, and provide the report to the COR within five calendar days of the accident.

2) Conduct an accident investigation for any of the following High Visibility Mishap: Load Handling Equipment and Rigging, Fall-from-Height. Make the initial report within four hours and provide a completed ENG Form 3394 to the COR within five calendar days of the accident.

Do not proceed with further operations until cause is determined, and corrective actions have been implemented to the satisfaction of the COR.

3) The COR must be notified by the most expeditious means available of all fatal and permanent total disability injuries, three or more persons hospitalized, all property damage of $500,000 or more, and structural damage involving a question of structural adequacy. All incidents involving disabling injury or an injury which may result in an employee's lost time, or property damage of $5,000 or more must be reported to the COR by telephone as soon as possible and in all cases within four hours.

4) In all accidents enumerated in sub-item (3), investigate the circumstances before the scene of the accident is changed, take corrective action, and within 48 hours forward to the COR four copies of ENG Form 3394.

5) In the event of an accident involving a fatality, permanent total disability, hospitalization of one or more persons, or property damage of $500,000 or more, the Contractor must promptly suspend all operations at the scene of the accident and notify the COR of the occurrence.

Immediately provide for the rescue and/or care of the injured. Restrict access to the area except in situations where safety may be compromised. Leave the scene undisturbed until investigated by a Government appointed board of investigation and until the Contractor is authorized to resume operations.

6) If property damage and injury result from the same accident, the consequence may be noted on the same ENG Form 3394. If more than one person is injured in a single accident, ENG Form 3394 must be submitted for each person injured.

c. Types of Accidents and Reports. For each accident that results in a consequence or combination of the consequences listed below, a complete report on ENG Form 3394 must be furnished to the KO.

Please note that these reports cannot be used for any purpose other than accident reporting.

1) Disabling injury (including death) is an injury that renders a person unable to perform a regularly established job on the day following the injury or on any subsequent day. Known suicide or deaths from natural causes are not reportable.

2) Damage of $5,000 or more to the Contractor's property or equipment, including motor vehicles and fire and/or damage to other property caused by the Contractor while executing the Contract.

3) Accidents occasioned by flood, hurricane, tornado, fire, navigation, wind, ice, etc., and structural failure in excess of $5,000.

11.5 Antiterrorism Operational Security (AT-OPSEC) Requirements

11.5.1 General Requirements

The security requirements described below apply to all contract personnel (including employees of the prime Contractor (“Contractor”) and all subcontractor employees) supporting the performance requirements of this contract. The Contractor is responsible for compliance with these security requirements. Questions regarding security matters shall be addressed to the designated Government representative (e.g., Contracting Officer Representative (COR), Requiring Activity (RA) representative, or Contracting Officer (if a COR or other

RA representative is not appointed)). Contract personnel are critical to the overall security and safety of US Army Corps of Engineers (USACE) installations, facilities and activities, and security awareness training contributes to those efforts. The Department of Defense (DoD) and Army security training requirements specified below, if applicable, are performance requirements; all applicable contract personnel shall complete initial training within 30 days of contract award or the date new contract personnel begin performance on the contract. Within five business days from the completion of training, the Contractor shall provide written documentation (e.g., email or memorandum) to the Government representative. The documentation shall include the names of contract personnel trained and which training they completed; the Contractor shall maintain training records as part of their contract files and be prepared to provide copies of training certificates to the Government representative. Contractor personnel and vehicles are subject to search when entering federal installations. Additionally, all contract personnel shall comply with Force Protection Condition (FPCON) measures, Random Antiterrorism Measures (commonly referred to as “RAMs”), and Health Protection Condition (HPCON) measures. The Contractor is responsible for meeting performance requirements during elevated FPCON and/or HPCON levels in accordance with applicable RA plans and procedures --this includes identifying mission essential and non-mission essential personnel. In addition to the changes otherwise authorized by the changes clause of this contract, should the FPCON or HPCON levels at any individual facility or installation change, the Government may implement security changes that affect contract personnel. The Contractor shall ensure all contract personnel are aware of their security responsibilities, including any site-specific requirements identified in local policies or procedures.

11.5.2 Physical security and access control

All contract personnel requiring physical access to a federal installation or facility shall comply with the access control procedures of that location. Contract personnel requiring unescorted access to meet contract performance requirements on a DoD installation in the US shall be vetted by the installation/facility Provost Marshal/Directorate of Emergency Services/Security Office using the National Crime Information Center- Interstate Identification Index (commonly referred to as “NCIC-III”) and Terrorist Screening Database (commonly referred to as “TSDB”). Contract personnel shall comply with all personal identity verification requirements specified in installation/facility policies and procedures. Contract personnel who do not meet requirements for unescorted access to USACE facilities shall coordinate escorted access with the Government representative, as needed. Contract personnel who receive keys, access cards, or lock combinations that provide access to government-owned property shall comply with key and lock control procedures of the RA.

11.5.3 Escorting in classified and/or sensitive areas

In accordance with applicable regulations, all contract personnel who do not possess the appropriate security clearance or access privileges will be escorted in areas where they may be exposed to classified information or operations, sensitive information or activities, or restricted areas.

11.5.4 Pre-screen candidates using E-Verify Program

The Contractor must pre-screen Candidates using the E-verify Program (http://www.uscis.gov/e-verify) website to meet the established employment eligibility requirements. The Vendor must ensure that the Candidate has two valid forms of Government issued identification prior to enrollment to ensure the correct information is entered into the E-verify system. An initial list of verified/eligible Candidates must be provided to the COR no later than 10 business days after the initial contract award.

11.5.5 Non-US Citizens

Submit to the COR a scanned legible copy of the Passport (and the Permanent Resident Card if available) for all personnel who are non-US citizens working on this contract at least one month (30 calendar days) in advance of the start of work by the employees. Contractor personnel who are non-US citizens shall not be permitted access to the Project until the Foreign Visitor Authorization is received from HQUSACE.

Contractor personnel who are non-US citizens shall not be permitted to work on the contract at all until Foreign Visitor Authorization is received.

11.6 Invoicing

Payment will be made for completed and accepted work. Provide invoicing that includes signed invoice, daily logs, summary sheets as applicable. Coordinate with COR prior to submission of invoice. Submit PDF invoice via email to the COR.

11.7 Interference with Government Operations

The Government may undertake or award other contracts for additional work during the performance of work. Do not commit or permit any act which interfere with the performance of work by any other Contractor or by Government employees.

11.8 Unacceptable Performance

If any of the services do not conform to contract requirements, the Government may require the Contractor to perform the services again in conformity with contract requirements, at no increase in contract amount.

11.9 Government Holidays

The Contractor is not required to perform services on the following recognized Federal holidays: New Year’s Day, Birthday of Martin Luther King, Jr., Washington’s Birthday, Memorial Day, Juneteenth, Independence Day, Labor Day, Columbus Day, Veterans Day, Thanksgiving Day, and Christmas Day.

Start of access road to intake deck Access road to intake deck

Attachment B – Site photos

B-1

For Information Only

Access road to intake deck and powerhouse

Guard shack for entrance to intake deck

Attachment B – Site photos

B-2

Intake deck, crane and powerhouse In-service GSU Transformers

B-3

View of spare GSU from T3 Intake deck Work area past spare GSU

B-4

Segment 2 of spare transformer

Segment 3 of spare transformer

Segment 1 of spare transformer

B1-5

Transformer bank T3 Transformer bank T4 in

Background Segment 4 of spare transformer

B1-6

Top of transformer Pressure relief device for vacuum connection

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