SOW - B100 Transformer Replacement.pdf

Facilities Engineering Department Page 1 of 12

Scope of Work and Specifications for

B100 – Install New Pad Mounted Transformer

Located at U.S. Coast Guard Base

Elizabeth City, N.C.

April 2025

Commanding Officer United States Coast Guard

Base Elizabeth City Facilities Engineering Department

Elizabeth City, NC 27909

Facilities Engineering Department Page 2 of 12

1) SCOPE: The Contractor shall provide all supervision, labor, equipment, parts, and materials to disconnect, remove, and dispose of the existing transformer at Building 100 and replace with a new transformer in accordance with specifications provided. This scope of work will also encompass verifying the existing equipment pad is sufficient, removing existing and installing new primary conductors, removing existing and installing new secondary conductors, and installing a new fusible safety switch.

2) GOVERNMENT FACILITIES AND UTILITIES:

a. Electrical power is available on the site. The Contractor will be permitted to utilize these utilities in performing the work, provided that the existing systems are not overloaded.

b. Telephone services will not be available for use by the contractor.

c. Building restroom facilities are not available for use. The Contractor shall provide portable restroom facilities for use by their employees.

3) MATERIALS AND LOCATIONS:

a. Materials shall be delivered to the jobsite in their original unopened packages, clearly marked with the manufacturer’s name, brand name, and description of contents. Storage shall be IAW manufacturer’s recommendations in a clean, dry, well-ventilated area. Stored materials shall be protected from sunlight and kept away from excessive heat.

Insulation board shall not be exposed to flame or other ignition sources.

The contractor shall not store any highly flammable materials in the work area. Sufficient area for staging is available on site; storage areas will be pre-approved by the Contracting Officer’s Representative (COR). Special precautions shall be taken to ensure construction materials and debris does not enter the airfield, runways, or taxiways.

b. The Contractor is required to comply with local VOC laws and regulations.

All applicable Safety Data Sheets (SDS) shall be available upon request.

4) SCHEDULE OF WORK: Completion of work shall be accomplished within 30 calendar days from acceptance of submittals. The Contractor shall perform all work during normal base work hours. The base normal working hours are 0700 – 1600, Monday through Friday. If the Contractor would like to work outside normal working hours, permission must be obtained from the COR.

5) EXISTING CONDITIONS: The contractor must satisfy themself as to the existing conditions and the work to be performed. The contractor shall verify all dimensions and equipment data prior to ordering materials and commencement of work. If a site visit is required, then it should be arranged through the COR.

6) LIABILITY OF CONTRACTOR: Any damage to government property caused by the contractor shall be repaired or replaced by the contractor at no cost to the

Facilities Engineering Department Page 3 of 12 government. The contractor shall not disconnect any service without approval from the COR.

7) INSPECTION AND ACCEPTANCE: The COR will accomplish inspection and acceptance of work.

8) LABOR LAWS: The Service Contract Act applies to the procurement.

9) SAFETY: The Contractor is wholly responsible for work site safety. The Contractor shall implement a safety program that protects the lives and health of personnel in the construction area, prevents damage to property, and avoids work interruptions. To accomplish this end, the Contractor shall provide appropriate safety barricades, signs, signal lights, etc. as well as complying with the requirements of all federal safety regulations as published by the Occupational Health and Safety Administration, 29 CFR 1910 (series), 29 CFR 1926 (series), State and Local safety laws, rules, and regulations. Any operation defined as "Hot Work" as per OSHA/NFPA requires a permit to be issued by Base Elizabeth City Fire Department by contacting 252-335-6257. This includes welding, cutting, brazing, grinding or any work that could produce sparks or heat and may initiate a fire.

10) SITE RESTORATION & CLEAN UP: The work site shall be cleaned up at the completion of each workday. The Contractor shall take special care to contain dust while working. Upon completion of the job, the Contractor shall clean up the job site, returning it to a state of cleanliness equal to or exceeding that in which it was found. The Contractor shall properly dispose of any trash, extra materials, dirt, debris, or other litter that remains. There will be no final acceptance of the contract until the COR approves the appearance of the job site.

11) ENVIRONMENTAL COMPLIANCE: The Contractor shall ensure all discharges do not exhibit contaminates contrary to Base Elizabeth City Non-Significant User (Wastewater) Permit. Any flushes, backwashes and or slug loads shall be scheduled and reported to Base Environmental Compliance Office (ECO) Wastewater Permit Manager at least two weeks in advance. Wastewater associated with any maintenance or repair shall be quantified in maintenance schedule. Any waste as a result of the project shall either be recycled IAW CIM

16455.10 and the Base Pollution Prevention Plan or be disposed of IAW the Resource Conservation and Recovery Act (RCRA). Any Hazardous Waste shall be manifested off site with Base listed as the Generator and signatory. Any hazardous waste shall be analyzed, characterized, stored and disposed of IAW the RCRA and all applicable federal, state (i.e., DOT) and local laws and ordinances. All work will be performed IAW the Base Spill Prevention Control and Countermeasures Plan, Clean Water Act (CWA) 40 CFR 112 and the Base Stormwater Pollution Prevention Plan (SWPPP). All chemicals required for this project shall be preapproved by the Base ECO Wastewater Permit Manager in Building 62. Safety Data Sheets (SDS) shall be provided to both the Base ECO

Facilities Engineering Department Page 4 of 12 and Safety offices and proper storage shall be provided IAW 29 CFR 1910.1200.

All installation related solid waste shall be removed from the Base after each working day. All activation flushes of the system shall be captured and disposed of IAW City of Elizabeth City Sewer Use Ordinance and USCG Base Industrial User Wastewater Permit. All extra chemicals and products shall be removed from the site upon work completion, as the Emergency Planning and Community Right-To-Know Act requires Coast Guard maintains an inventory of all Hazardous Materials located at the site. A laydown area as required and an Erosion and Sediment Control Plan, these shall be preapproved by Base ECO IAW the SWPPP. Laydown areas will be approved on a case-by-case basis by the Contracting Officers Representative and Base Environmental Compliance Office on non-vegetative areas only. Any damage to vegetated areas shall be repaired and reseeded by the Contractor. Nothing shall be discharged to a storm drain at any time during the project. All storm drains within range of a potential discharge shall be covered/sealed during installation and kept covered until the work has been completed and the system has been deemed fully operational and compliant with all applicable CG policies/plans/permits/laws/ordinances. All storm drains and waterways within range of a potential discharge shall be covered/sealed or protected by silt fence. All spills shall be reported to Base ECO (Chris Dunn) at (252) 267-9789 after containing and dialing (252) 335-6257 for Base Spill Response.

12) GOVERNMENT FACILITIES AND REGULATIONS: The Contractor, their employees, and any sub-contractors shall become familiar with and obey all Base/Unit regulations. All personnel employed on the project shall keep within the limits of the work area and shall not enter any other area outside of the work site unless to do so in the performance of their duties. Work site and execution must be arranged so as not to disrupt normal operations in this area. There shall be No Smoking in any Coast Guard Building. All smoking must be done only in a designated smoking area.

13) CONTRACT TIMELINE: The Contractor shall provide all required information and complete this contract within this time schedule, unless approved by the Contracting Officer. A workday is defined as any non-weekend or non-Federal Holiday.

a. Provide all required submittals to the Contracting Officer within 10 calendar days after contract award.

b. The USCG will have 7 calendar days to review the submittals and respond to the Contractor.

c. The Contractor shall provide projected delivery schedule during proposal and provide a firm delivery date within 10 calendar days after the contract has been awarded.

d. The Contractor, upon receiving notification to proceed, must mobilize to the site within 10 work days.

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e. The work, including removal & disposal of existing transformer, and new transformer installation must be completed and useable within 10 workdays of mobilization.

f. The Contractor may notify the Contracting Officer of any long lead time equipment or materials and request a modified delivery date of the work.

14) SUBMITTALS: Once awarded, the following list of submittals must be submitted on the timeline indicated and define the specific minimum requirements for this contract. The submittal shall contain sufficient information that can be used to determine compliance of the material with these specifications and referenced specifications.

a. Work Schedule – Prior to mobilization

b. Conductor Product Data – Prior to installation

c. Fusible Safety Switch Product Data – Prior to installation

15) TECHNICAL REQUIREMENTS: The Contractor must provide all supervision, labor, equipment, parts, and materials to complete the work including:

a. Replace Transformer at Building 100

i. The Contractor shall disconnect, remove and dispose of the existing transformer. The existing transformer is a 500kVA pad mounted transformer. The primary side voltage is 13.2kV and the secondary side voltage is 480Y/277V. The existing transformer is liquid-filled with mineral oil.

ii. The Contractor shall disconnect the 15kV medium-voltage (MV) connections, the secondary connections and the ground connections.

iii. The Contractor shall install a government provided new transformer.

The new transformer has been ordered and is located on-site. The specifications for the new transformer are as follows:

• 750kVA, 3-phase, liquid-filled, pad mounted transformer

• 13.2kV:480Y/277V stepdown transformer

• NEMA 4x rated enclosure

• Dead front rated

• Bayonet fuses

• Current limiting fuses

• Liquid-filled with FR3 oil

• Model Number: MT-PML-R7-3P-DMQ-750KVA-YE-LT-DF-A6-BF-

CS-2B4-M2

• Serial Number: 40622ZS750-C1

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iv. The Contractor shall install the new transformer utilizing appropriate connections for primary, secondary and ground connections. The Contractor shall ensure that 15kV medium-voltage (MV) connectors are used where appropriate. Provide necessary grounding and bonding equipment.

v. The Contractor is responsible for removal and disposal of the existing transformer from the Base.

vi. The Contractor shall remove existing primary and secondary conductors and dispose off-site from the Base.

vii. The Contractor shall complete the following work associated with the existing transformer equipment pad:

• Confirm size of new 750 kVA transformer from manufacturer provided specifications and drawings to the as-built transformer.

• Ensure existing conduit stub-ups are located in the correct orientation for the new transformer.

• Measure existing equipment pad to determine if equipment pad will need to be enlarged. If equipment pad is needed to be enlarged, contact COR to determine path forward.

• Transformer equipment pad grounding plan has been provided in reference documents. Verify existing is in good shape and if needed install per detail.

viii. The Contractor shall complete the following work associated with installing primary conductors in existing 4” conduit:

• Run 3 phases of conductors (350kcmil w/ shield) and one (1) #2 ground from manhole to the base on the primary side of the new 750KVA transformer. Utilize existing 4” PVC conduit encased in duct bank. (Approximate length from manhole to transformer base = 350 ft).

• End-prep power conductors and install appropriate 15kV MV connectors on both ends of cables. Prep and terminate shield of MV cable to ground.

• End-prep ground conductor and install appropriate ground connections.

ix. The Contractor shall complete the following work associated with installing secondary conductors and accommodating for a fusible safety switch:

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• Run 2 sets of four (4) 700kcmil conductors and 2 sets of one (1) #2/0 ground from the base of the new 750KVA transformer to the base of the new safety switch and existing switchboard.

• Conductors can be routed from base of the new transformer either underground through existing conduit or overhead of the sidewalk and into the building mechanical/electrical room utilizing a metal wireway.

• Conductors shall be routed from new transformer to safety switch (mounted on side of building) and then into the mechanical/electrical room.

• End-prep power and ground conductors and install appropriate terminations.

x. The Contractor shall complete the following work associated with installing a new 800A fusible safety switch:

• Set new Fusible Safety Switch in the vicinity of the new transformer.

• Install new conduit from secondary feeder lines to the Safety Switch.

• Run and connect new secondary wire from the transformer to the safety switch, and from the safety switch to the existing Main Switch Board.

• Safety switch will be mounted to the side of the building and connection from safety switch to existing main switch board will penetrate through the building wall.

xi. The Contractor shall ensure testing and start-up to verify proper operation.

xii. The Contractor shall install this equipment in accordance with the National Electrical Code (NFPA 70), including the equipment manufacturer recommendations or requirements.

xiii. New equipment must be installed in accordance with applicable UFGS sections, manufacturer instructions, NEC, IEEE, and federal and state codes.

xiv. All material shall meet the following standards at a minimum:

• UFC 3-501-01

• Applicable UFGS

• NEC (National Electrical Code)

• NEMA (National Electrical Manufacturers Association)

• UL (Underwriters Laboratories)

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xv. Installation, operation, maintenance manuals and warranty information for the equipment shall be turned over to the COR upon project completion. The Contractor shall provide a one year warranty on the equipment supplied by the Contractor (including labor) from the startup date of the equipment for any problems that might occur with the new installation.

xvi. It is recommended that the Contractor make a site visit to properly evaluate the location and verify all aspects and/or specifications to the existing transformer.

xvii. The Contractor shall schedule all work with the COR. The Contractor shall understand the importance to schedule and complete all work in a timely fashion.

xviii. The Contractor shall perform all work IAW all Federal, EPA, OSHA, and State of North Carolina laws and regulations.

16) TESTING AND INSPECTION:

a. The Contractor must notify the COR two working days before the performance, inspection and acceptance tests are to be conducted. The tests must be performed in the presence of the COR.

b. Installation, workmanship, fabrication, assembly, erection, examination, inspection, and testing shall be in accordance with appropriate sections of

29 CFR 1910, 1926.

17) FIGURES

a. Figure 1: Proposed one-line plan for upgraded service

b. Figure 2: Transformer equipment pad detail

c. Figure 3: Transformer equipment pad detail 2

d. Figure 4: Transformer pad grounding detail

18) REFERENCE DOCUMENTS

a. Sytronics, Inc – Drawing E3.2 (Electrical One Line Diagram – New Work), Latest revision

b. Engine Test & Repair Facility (Original As-Built) – PN: 400185, sheets E1

& E2 (dated: 1/18/1985)

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Figure 1: One-line plan to upgrade Building 100 service with a 750KVA Transformer.

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Figure 2: Transformer equipment pad detail

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Figure 3: Transformer equipment pad detail 2

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Figure 4: Transformer pad grounding detail

13.8 KV

500 KVA

480/277V, 3Ø

125A 250A

SWITCHBOARD 'MSB' ITE TYPE FCI

300A

14 KA

FEEDER SCHEDULE

3 - NO. 2/0 AWG THWN CU WITH 1 - NO. 4 GND

1 - 2" GRS ABOVE GRADE,

SCH. 40 PVC BELOW GRADE

CONDUCTORMARK CONDUITS

800A, 480/277V, 3Ø, 4W, 14 KA

M

MAIN SERVICE LOAD CALCULATIONS:

MSB

1. PEAK DEMAND(PAST 12 MONTHS MAX.):

2. 25% OF PEAK:

3. EQUIPMENT REMOVAL:

a. COOLING TOWER PUMP (5 HP):

b. DYNO COOLING PUMPS (2-15 HP):

c. COOLING TOWER FAN (10 HP):

4. EQUIPMENT ADDED:

a. COOLING TOWER PUMP (5 HP):

b. DYNO COOLING PUMP (2-15 HP):

c. COOLING TOWER FAN (25 HP):

d. DYNO POWER PACK

e. AIR DRYER

f. AIR COMPRESSOR AC-1 (100 HP)

SCALE:

E3.2

ELECTRICAL ONE LINE DIAGRAM

NTS

700A

NEUTRAL BUS

GROUND BUS

3 - 4/0 AWG

1 - NO. 4 GND

400 AS

T O

M

D

U L A

R

B

U I L D

I N

G

2 SETS OF 4 - 500 MCM

2 - 1/0 AWG GROUNDS

100A70A 125A 100A

ELECTRONIC

SOFT STARTER

NEW AIR

COMPRESSOR

AC-1

100 HP

139 FLA

PANEL

AC

480/277V

125A

PANEL

LAC

120/240V

1Ø

480V

10 KVA

120/240V, 1Ø

3 - 350 MCM

1 NO. 4 GND

50A

D.C. ELEC.

START

SYS.

30 KW

20A

SHAFT

CELL

MONO

35A

JET CELL

MONO

10 HP

20A

JET CELL

OH DOOR

1 HP

18a 18b 19a 19b

100A

20A

23 12

SSOR

15A

15A

20A

SSOR

TC3

POWER PACK

TS 700

7.4 KVA

PANEL P1

JET CELL

MONO

TC HOIST

PRESS FAN

NO. 1

LTS 101

1 HP

2.1A

PRESS FAN

NO. 2

LTS 101

1 HP

2.1A

COOLING

TOWER

CIRC. PUMP

5 HP

7.6A

16 17

FOOD WASH

SYS. PUMP

7 1/2 HP

FOG

SYS

PUMP

15 HP

20A

70A

SSOR

SSOR

60A NF

NEMA 4X

NEW

COOLING

TOWER

FAN

25 HP

34A

15A

THRUST

STAND

HYD. PUMP

3 HP

PRESS FAN

NO. 2

T-700

1 HP

45A

SSOR

30A NF

NEMA 3R

NEW DYNO

COOL PUMP 1

15 HP

21A

45A

SSOR

30A NF

NEMA 3R

NEW DYNO

COOL PUMP 2

15 HP

21A

30A

SSOR

30A

SSOR

15A

SSOR

SSOR

JET FUEL

PUMP 1

1 1/2 HP

SPARE

PRESS FAN 1

T-700

1 HP

PRESS OIL

PUMP

1/2 HP

MOTOR CONTROL CENTER - MCC - ROOM 116

300A, 480V, 3Ø, 3W, 42 KA

3 -NO. 12 AWG THWN CU WITH 1 - NO. 12 GND2

3 - NO. 12 AWG THWN CU WITH 1 - NO. 12 GND 1 - 3/4" LIQUID TITE FLEX3

1 - 3/4" GRS ABOVE GRADE,

1 - 3/4" SCH. 40 PVC BELOW GRADE

262.0 KVA

65.5 KVA

-6.1 KVA

-33.5 KVA

-11.2 KVA

276.7 KVA

6.1 KVA

33.5 KVA

27.1 KVA

7.4 KVA

10.0 KVA

110.7 kVA

194.8 KVA

OR 567 AMPS AT 480V, 3Ø

276.7 KVA

194.8 KVA

471.5 KVA

4 44

6 6 6 6 6

30/3

6 6 6 66

20A 45A

SSOR

SSOR

20A

66 6

1 1

15A

15A20A

30A NF

NEMA 3R

AIR DRYER

12.6 MCA

30/3

NEMA 3R

SSORSSOR

3-NO. 12

1-NO.12 GND

SPARE

3 -NO. 10 AWG THWN CU WITH 1 - NO. 10 GND4

3 - NO. 8 AWG THWN CU WITH 1 - NO. 8 GND 1 - 3/4" GRS5

1 - 3/4" GRS

NEMA 3R

AIR

COMPRESSOR

AC-1

40 HP

20A

SSOR

SPARE

3 3

5 5

100% DESIGN

REVIEW

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PROJECT#:

DRAWN BY:

DATE:

SHEET#:

SCALE:

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S C

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MECHANICAL

UPGRADES

22084

TAE

3/30/23 AS NOTED

D

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B E

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C R

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ELECTRICAL

ONE LINE

DIAGRAM

NEW WORK

E3.2

1. INSTALL NEW FEEDER BREAKER IN MAIN SWITCHBOARD 'MSB'.

2. INSTALL NEW FEEDER.

3. INSTALL NEW DISCONNECT TO SERVE EQUIPMENT.

4. ADJUST SOLID STATE OVERLOAD RELAY TO PROVIDE OVERLOAD PROTECTION FOR MOTOR.

5. UTILIZE EXISTING FEEDER BREAKER IN MAIN SWITCHBOARD TO SERVE NEW AIR

COMPRESSOR. VERIFY RATING AND REPLACE BREAKER IF NECESSARY.

6. UTILIZE EXISTING FEEDER. PERFORM MEGGER TEST TO VALIDATE CONDITION OF THE

CONDUCTOR INSULATION.

7. INSTALL NEW MOTOR CONTROL CENTER 'MCC'.

X

KEYED NOTES:

AutoCAD SHX Text Y

JRShepherd Approved

JRShepherd Text Box Location for the MCC is approved.

NOTE: the references for the Switchboard and the Transformer were removed from this drawing.