Attachment J.3 Kwajalein-Fac 936 (Tank 13) Ext Final - 2018.pdf

US Army Corps of Engineers Omaha District

API 653 In-Service Inspection Report

US Army Garrison Kwajalein Atoll Facility 936

Tank 13 US Army Corps of Engineers Center of Expertise for Petroleum, Oils and Lubricants

(USACE POL-MCX)

12/2018

API 653 In-Service Inspection US Army Kwajalein Atoll, RMI

Table of Contents

ACRONYMS AND ABBREVIATIONS

GENERAL SUMMARY

INSPECTION DATE

PREVIOUS INSPECTION DATES

RECOMMENDED FUTURE INSPECTION DATES

GENERAL TANK INFORMATION

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection

2. Site Information

B. TANK INSPECTION COMMENTS

1. Tank Construction

2. Tank Foundation

3. Cathodic Protection

4. Tank Shell

5. Fixed Roof

6. Tank Appurtenances

a. Tank Shell

b. Fixed Roof

c. Gauging

d. Level Alarms

e. Stairs and Platforms

f. Grounding and Bonding

7. Tank Coating

8. Tank Piping System

9. Fire Protection System

10. Secondary Containment

11. Out-of-Roundness Survey

C. FINDINGS AND RECOMMENDATIONS

1. MANDATORY REPAIRS per API 653, UFC 3-460-01, or AW 78-24-27 Standards

2. RECOMMENDED REPAIRS to Fully Comply with API 653, UFC 3-460-01, or AW 78-24-27 Standards

3. RECOMMENDED REPAIRS as Part of Regular Maintenance

D. INSPECTION INTERVALS

4. Routine In-service Inspection

5. External Inspection with Ultrasonic Thickness Inspection

6. Internal Inspection

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

API 653 Appendix B Settlement Evaluation

Shell Service Life Evaluation

Table 1 - Shell Ultrasonic Thickness Readings

Table 2 - Nozzles and Appurtenances

Table 3 - Dry Film (Coating) Thickness

Drawing A-1 – Shell Roll-Out

OSHA Access Structure Report

APPENDIX B: 3-D DOCUMENTATION AND ANALYSIS

Drawing B-1–OOR Survey Results

Drawing B-2–OOR Survey Results

Drawing B-3–OOR Survey Results

APPENDIX C: API 653 CHECKLISTS FOR TANK INSPECTION

APPENDIX D: PHOTOGRAPHS

ACRONYMS AND ABBREVIATIONS

AFFF Aqueous Film Forming Foam

API American Petroleum Institute

AST Aboveground Storage Tank

ATG Automatic Tank Gauge

BBL Barrel

DB&B Double Block and Bleed

FML Flexible Membrane Liner

HHLA High-High Level Alarm

HLA High Level Alarm

HLCV High Level Control Valve

IAW In Accordance With

ICCP Impressed Current Cathodic Protection

LLA Low Level Alarm

NDT Non-Destructive Testing

NFPA National Fire Protection Association

OOR Out-of-Roundness

OOS Out-of-Service

PRT Product Recovery Tank

RMI Republic of Marshall Islands

TLG Tape Level Gauge

TRV Thermal Relief Valve

UFC Unified Facilities Criteria

USACE United States Army Core of Engineers

USAG-KA U.S. Army Garrison Kwajalein Atoll

UTT Ultrasonic Thickness Testing

VT Visual Testing

GENERAL SUMMARY

POND was under contract to the United States Army Corps of Engineers (USACE), Omaha District, to provide an in-service (external) American Petroleum Institute (API) 653 tank inspection for Tank 13 (Facility 936) at US Army

Garrison Kwajalein Atoll (USAG-KA) in the Republic of Marshall Islands (RMI).

The in-service inspection was performed 28-30 November 2018 in accordance with (IAW) API 653, 5th Edition.

Results of inspection and testing activities identified recommended repairs and upgrades required to comply with

API 650/653, United Facilities Criteria (UFC) 3-460-01/3-460-03, AW 78-24-27, and industry standards.

Contained in this report is a detailed account of the tank inspection, non-destructive testing (NDT) methods, and conclusions derived from the inspection and testing activities. Findings from this inspection are further detailed in

Section B of this report. Recommended repairs and upgrades identified in Section B are further classified and listed in Section C of this report.

INSPECTION DATE

API In-Service Inspection Date: 28-30 November 2018 Equipment Used:

Manufacturer: GE Krautkramer Ultrasonic Thickness Gauge w/ Topcoat Model Number: DMS GO+ Calibration Method: 1-Point Calibration

Manufacturer: Fisher Technologies Dry Film Thickness Gauge Model Number: Dual Scope MPOR Calibration Method: Calibration to Known Thickness Standard

Manufacturer: TOPCON Laser Scanner Model Number: GLS-200 Calibration Method: Non-Required

Manufacturer: Zip Level Pro-2000 High Altimeter Model Number: 40-6515 Calibration Method: On-Site Calibration to Standard

Inspector(s):

John G. Cronin, EIT James Hancock

PREVIOUS INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: June 2014 API In-Service (External) Inspection Date: June 2014

RECOMMENDED FUTURE INSPECTION DATES

Routine In-Service: Monthly Out-of-Service (Internal): March 2026 In-Service (External) w/ UTT: November 2023 *Inspection interval based on post-repair inspection report dated September 2016.

John G. Cronin, EIT James F. Hancock II Mechanical Integrity Engineer Senior Technician API 653 Inspector # 77554 API 570 Inspector # 83088

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner U.S. Army

Location USAG-KA, RMI

Facility Number 936

Tank Number 13

Inspection Date 28 – 30 November 2018

Tank Manufacturer Unknown

Design Standard API 12C (Based previous report)

Date of Construction 1951

Tank Contents JP-5

Tank Diameter 45’-0”

Shell Height 30’-0”

Max. Product Height 26’-0”

Tank Capacity 8,500 BBL (357,000 Gallons)

Foundation Concrete Ring Wall – On Grade

Construction

Bottom* N/A – External Inspection

Shell Butt-Welded Steel Plates / Five (5) Shell Courses

Floating Roof* N/A – Tank not Equipped with Floating Roof

Fixed Roof Aluminum Geodesic Dome

Material

Bottom Carbon Steel

Shell Carbon Steel

Floating Roof* N/A – Tank not Equipped with Floating Roof

Fixed Roof Aluminum

Cathodic Protection Impressed Current Cathodic Protection (ICCP) System

Interior Coating System

N/A – External Inspection

Exterior Coating System

Epoxy - Assumed

Level Gauging Varec 2500B Float Gauge / Enraf ATG

Overfill Protection High level control valve (HLCV) at Receipt / HLCV Float Switch Chamber

Piping Receipt 6” Carbon Steel

Main Suction 6” Carbon Steel

Low Suction 6” Carbon Steel

Water Draw-Off 1 ½” Carbon Steel

Level Alarms Low Level Alarm (LLA) / High Level Alarm (HLA) / High-High Level Alarm (HHLA)

*Based on previous (post repair) inspection report dated August 2016.

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection

An in-service (external) API 653 inspection was performed 28-30 November 2018 for Tank 13 (Facility

936). Results of this inspection identified recommended repairs and upgrades required to comply with

API 650/653, UFC 3-460-01/3-460-03, AW 78-24-27, and industry standards.

2. Site Information

USAG-KA, located in the RMI is home to the Ronald Reagan Ballistic Missile Defense Test Site. The use of the Kwajalein Atoll as a U.S. military facility is made possible through a Compact of Free Association with the RMI. The USAG-KA Commander is responsible for Kwajalein and Roi-Namur's more than 1,250 residents, which are comprised of military personnel, Army civilians, contractor employees, and family members.

B. TANK INSPECTION COMMENTS

1. Tank Construction

Tank 13 is a welded, steel, vertical, JP-5 aboveground storage tank (AST). The original tank manufacturer is unknown. According to the previous inspection report, the tank was constructed IAW with design standard API 12C in 1951. Tank 13 is 45’-0” in diameter and 30’-0” high with a nominal capacity of 8,500 barrels (BBL) (357,000 gallons). The previous out-of-service (OOS) inspection was performed in June

2014 and the report was available for review and comparison.

2. Tank Foundation

Tank 13 rests on a concrete ring wall foundation positioned at grade level. The tank chime-to-ring wall interface is covered with soil and vegetation at multiple locations, allowing the potential for corrosion at the tank chime. A maintenance program should be implemented to routinely remove all soil and vegetation from the concrete ring wall foundation and tank chime-to foundation interface.

A settlement survey was performed at the tank foundation. No signs of settlement were noted. See

Appendix A for settlement results.

3. Cathodic Protection

The tank is equipped with an ICCP system for protecting the tank bottom from corrosion.

4. Tank Shell

The tank shell is equipped with five (5) butt-welded steel courses. Shell plates were examined using ultrasonic thickness testing (UTT) and visual testing (VT) methods. Nine (9) UTT measurements were taken on each plate of the 1st shell course. Nine (9) UTT measurements were taken on the remaining shell courses using the spiral staircase for access. The lower portion of the 1st shell course is provided with multiple insert plates and lap patches. One (1) UTT reading was taken on each insert plate. The average thickness of the insert plates was 0.251” and values ranged from 0.237”-0.306”. Insert plates are of similar size to the first shell course. UTT measurements indicated no significant metal loss on shell plates.

The tank is provided a spiral staircase for access to the fixed roof. There are sixty-four (64) stair treads at support rods provided for the spiral staircase. All sixty-four (64) stair treads are not fully seal-welded to the tank shell allowing water ingress and crevice corrosion. All sixty-four (64) stair support rods attached at the shell are not provided bearing plates. Bearing plates help distribute the load on the tank shell alleviating stresses at attachment locations.

The tank shell is not provided with an emergency responder diamond, IAW National Fire Protection

Agency (NFPA) 704, to identify hazard ratings for health, flammability, and instability. The ratings aid emergency responders in quickly assessing the severity of the situation and allow a proper response.

Current product designation labeling on the tank shell is fading and peeling. Tank 13 is not provided with a data plate.

Refer to Drawing A-1, “Shell Roll-Out” and Table 1, “Shell Ultrasonic Thickness Readings” in Appendix A for plate location and thickness data.

5. Fixed Roof

The fixed roof is of aluminum geodesic dome construction. The aluminum geodesic dome was examined using VT methods. The inspection was limited to areas adjacent to the spiral staircase upper platform.

Geodesic dome appeared to be in good overall condition with no signs of voids or deterioration in sealant.

Facility personnel stated they do not have issues with the dome leaking.

6. Tank Appurtenances

a. Tank Shell

Shell nozzles consist of one (1) 32” manway, one (1) 20” manway , one (1) 1 ½” water draw-off

(flanged), one (1) 6” low suction (flanged), one (1) 6” main suction, one (1) 6” receipt, one (1) 1 ½” plugged nozzle, four (4) 1” penetrations for the HLA/HHLA/HLCV and LLA, and one (1) penetration for the aqueous film forming foam (AFFF) chamber. Shell nozzles and reinforcement pads were examined using UTT and VT methods. Four (4) UTT measurements were taken on each nozzle, over

2”, with a welded connection, at each of four quadrants (0⁰, 90⁰, 180⁰, 270⁰). One (1) UTT measurement was taken on each nozzle with a welded connection 2” or less. One (1) UTT measurement was taken on each associated reinforcement pad.

Pitting was identified on the product receipt piping with a maximum depth measured to be approximately 0.160”. This depth will exceed the structural thickness limit of 0.113” in 1.2 years, specified in API 574, Table 6. Tell-tale holes at shell nozzle reinforcement pads are unplugged and absent of lithium grease. Filling unplugged tell-tale holes with grease helps prevent water ingress, insect infestation, and build-up of debris. Corrosion staining was observed at tell-tale holes. Main suction and receipt lines are not provided with product flow direction arrows and existing product designation labels are fading, peeling and have become illegible. Forty-two (42) fasteners provided at manway 1 (MW1) and manway 2 (MW2) exhibit signs of deterioration with minor metal loss.

Tank 13 is not provided a water draw-off system or product recovery tank (PRT). The current water-draw line is provided with a ball valve. The PRT should be configured to facilitate wet-testing of the HLA/HHLA float chambers. Wet-testing should be controlled via transfer pump, which will supply and drain fuel to each chamber.

Refer to Refer to Drawing A-1, “Shell Roll-Out” and Table 2, “Nozzles and Appurtenances” in

Appendix A for nozzle location and data.

b. Fixed Roof

The geodesic dome fixed roof consists of one (1) 8” Enraf automatic tank gauge (ATG) and one (1) inspection hatch.

c. Gauging

The tank is provided with an 8” Enraf ATG system for automatic tank gauging, and a Varec 2500B tape level gauge (TLG) for monitoring product level from the ground. The TLG failed the bump test indicating the spring may not be actuating the tape adequately, potentially resulting in inaccurate liquid level readings. The tank is not provided with a Vito temperature/water combination probe.

To house the Vito temperature/water combination probe, one (1) 8” roof flanged nozzle should be installed as close to the perimeter sump as feasibly possible. The tank is not provided a manual gauging hatch.

d. Level Alarms

The tank is provided with independent shell-mounted HLA/HHLA and LLA systems. Coating provided at piping for the level alarms is compromised displaying signs of flaking, deterioration, and base metal exposure with surface corrosion.

e. Stairs and Platforms

The tank is equipped with a spiral staircase for accessing the roof. A through-hole exhibiting signs of active corrosion was identified on the upper platform of the spiral staircase. The structural integrity of the platform may be compromised if the through-hole continues to propagate in size resulting in potential hazards for users.

f. Grounding and Bonding

The tank shell is equipped with three (3) grounding lugs and cables that are in good overall condition with no signs of damage.

7. Tank Coating

The tank coating is in poor overall condition exhibiting signs of widespread failure and surface corrosion. A coating program should be implemented to repair identified areas of compromise.

External coating at the tank shell has deteriorated and exhibits significant chalking, indicating the polyurethane topcoat is near the end of its life cycle. A coating condition assessment of the external shell should be performed prior to recoating to determine the condition of the base coat. Additionally, the external shell coating exhibits flaking, deterioration, corrosion staining, and base metal exposure with surface corrosion.

The Enraf ATG exhibits coating failure with signs of flaking, deterioration, and base metal exposure and corrosion staining. Coating for the spiral staircase exhibits minor instances of failure with base metal exposure and surface corrosion. Forty-two (42) stair rod supports exhibit coating failure with signs of flaking, deterioration, and base metal exposure with surface corrosion. All nozzles and appurtenances attached at the tank shell exhibit severe coating failure with signs of flaking, deterioration, and base metal exposure with surface corrosion.

8. Tank Piping System

Carbon steel flanges provided at piping for the level alarms, receipt, main suction, recirculation (both main suction and receipt), and low point drains are attached directly, without isolation, to stainless steel flanges via stainless steel nuts and bolts. This configuration causes significant deterioration of the carbon steel flanges as a result of galvanic corrosion. The underside of the main suction, receipt and recirculation pipelines are wrapped. Wrapping prevents full examination of piping systems and may cause accelerated corrosion due to water retention between the pipe and wrapping.

Carbon steel piping provided for the AFFF is supported with stainless-steel pipe supports. Currently, the dissimilar metals are not provided proper isolation, via a Teflon pad or equivalent, and are in direct contact. This situation may lead to galvanic corrosion due to varying electrochemical potentials of the metals. Crevice corrosion was identified at the interface between the stainless-steel pipe supports and the AFFF piping. The coating provided for the AFFF piping is in poor overall condition and requires recoating. The AFFF piping should be recoated red IAW with MIL-STD-161H, Section 4.3.3.

Crossover piping provided for the main suction and receipt pipelines are equipped with stainless-steel ball valves. Four (4) stainless-steel ball valves are provided with carbon steel handles exhibiting signs of deterioration due to galvanic corrosion. The low suction line is currently flanged directly after the double block and bleed (DB&B) valve. This section is not adequately supported which results in the entire weight of the piping and associated DB&B valve resting on the tank shell. This configuration may result in structural damage to the tank shell.

9. Fire Protection System

For fire protection, Tank 13 is provided with an AFFF system.

10. Secondary Containment

Tank 13 is located within an earthen containment dike with vertical concrete walls that are lined with a flexible membrane liner (FML). The integrity of the FML could not be verified, as it is currently covered with a layer of soil and vegetation approximately 6” in depth. Penetrations at the containment dike walls for the AFFF piping and electrical conduit are not adequately sealed exhibiting signs of degraded material and compromised sealant respectively.

Integrity of the containment dike drainage system should be verified as the current facility procedure is to wait for any liquid within the dike area to evaporate. This impedes access to the tank and prevents adequate inspection for “sheen”. The presence of sheen signifies petroleum may have released into the containment area creating a potential risk for harmful environmental effects. Additionally, it should be noted that a construction crew working in the adjacent containment dike noted water continually entering the dike drain pit despite efforts to drain liquid out.

11. Out-of-Roundness Survey

An out-of-roundness (OOR) survey was performed on the tank shell to detect any deformations of the shell. Results of the OOR survey yielded both inward and outward deflections. The maximum inward deflection observed was 0.261’ (3.131”). The deflection is located 27.41’ above the shell-to-bottom weld and 41.2° (arc length of 16.18’) from manway 1. The maximum outward deflection observed was 0.221’

(2.647”). The deflection is located 27.41’ above the shell-to-bottom weld and 183.5° (arc length of 72.06’) from manway 1. API 650 Section 7.5.3 provides an OOR radius tolerance standard that is not to exceed ±

¾". It should be noted this requirement is for newly constructed tanks. Analysis consisted of examining tank shell deviations from a best fit cylinder at 2.95” intervals in the y-direction and 1.5’ intervals in the x-direction beginning at the shell-to-bottom weld below manway 1.

It should be noted no visual observation of OOR was observed on the tank shell during the inspection.

The out-of-tolerance inward and outward deflections is likely due to out-of-tilt error caused during the

3D scanning phase. The 3D scanner was placed on a metal platform, extending the length of the containment. Slight shifts in weight and vibrations due to scanning, cause shifts in tilt of the scanner, resulting in a larger error in data collected. Refer to Drawings B-1 through B-3 for OOR mapping.

C. FINDINGS AND RECOMMENDATIONS

The following subsections outline the itemized tank repairs/upgrades. Repairs and upgrades shall be completed

IAW API and AW 78-24-78 requirements.

1. MANDATORY REPAIRS per API 653, UFC 3-460-01, or AW 78-24-27 Standards

Mandatory repairs represent items that require immediate attention in order to prevent imminent risk to system operators, equipment integrity, or the adjacent environment.

a. Pitting

OBSERVATION: Pitting was observed on the receipt line, approximately 7’-10” downstream of the containment wall penetration. The maximum depth of the pit was found to be 0.160”. The pit was evaluated to ASME B31.G in which a failure is not expected to occur until the operating pressure exceeds 1,384 pounds-per-square-inch (psi). According to facility personnel, the maximum operating pressure of the pipeline is 50 psi. The current status of the pit does not present pressure limitations;

however, it will exceed structural thickness limitations (0.113”) in approximately 1.2 years.

CODE REFERENCE: API 574 Table 6

RECOMMENDATION: Provide weld deposition or sleeve repair at pitting on receipt piping. Pit is located at the 5-o-clock position, 7’-10” downstream of the containment wall penetration.

2. RECOMMENDED REPAIRS to Fully Comply with API 653, UFC 3-460-01, or AW 78-24-27 Standards

Recommended repairs represent items that should be addressed in a timely manner in order to prevent future potential risks to system operators, equipment integrity, or the adjacent environment. These items may be required by Federal, State, and Local Codes or by Military Criteria.

a. Stair Tread

OBSERVATION: Stair treads are seal welded at the bottom of each plate. Seal welds are required to prevent water or moisture from corroding the tank shell. Crevice corrosion was observed from water ingress.

CODE REFERENCE: UFC 3-460-01, Section 8-11

RECOMMENDATION: Provide 1 linear foot seal weld to each of the sixty-four (64) stair treads attached to the tank shell.

b. Corroded Fasteners

OBSERVATION: Fasteners for both MW1 and MW2 exhibit deterioration with minor metal loss.

CODE REFERENCE: UFC 3-460-01 Section 9-8.F

RECOMMENDATION: Replace forty-two (42) corroded fasteners at both MW1 and MW2.

c. Nozzles and Appurtenances Coating Failure

OBSERVATION: Coating at various nozzles and appurtenances display signs of flaking, deterioration, and base metal exposure with surface corrosion.

CODE REFERENCE: UFC 3-460-03 Section 8-3.10

RECOMMENDATION: Provide 492 ft2 of coating repair to the following nozzles and appurtenances:

• Spiral staircase – 30 ft2

• HLA – 5 ft2

• HHLA – 5 ft2

• Main suction – 20 ft2

• LLA – 9 ft2

• MW1 cover – 8 ft2

• MW2 cover – 8 ft2

• AFFF piping – 250 ft2 (coat red)

• Receipt – 35 ft2

• Receipt low point drain, located up stream of HLCV – 7 ft2

• Main suction low point drain, located down stream of DB&B – 7 ft2

• Nine (9) HLCV conduit supports – 1 ft2 each

• Three (3) upper platform supports – 1 ft2 each

• Forty-two (42) stair rod supports – 1 ft2 each

• Enraf ATG – 4 ft2

• Recirculation line (both receipt and main suction) – 50 ft2

d. Metal Loss at Flanges

OBSERVATION: Carbon steel flanges are attached directly to stainless steel flanges via stainless steel nuts and bolts. This type of configuration cause significant deterioration of the carbon steel flange.

CODE REFERENCE: UFC 3-460-01 Section 9-8.F

RECOMMENDATION: Provide one (1) isolation flange kit at the following locations:

• HLA carbon steel flange – two (2)

• HHLA carbon steel flange – two (2)

• LLA carbon steel flange – four (4)

• Receipt crossover piping – four (4)

• Main suction crossover piping – two (2)

• Recirculation line (both main suction and receipt) crossover piping – four (4)

• Receipt low point drain – two (2)

• Main suction low point drain – two (2)

• Recirculation line (both main suction and receipt) low point drain– four (4)

e. Emergency Responder Labeling

OBSERVATION: Tank is not provided with a NFPA emergency responder diamond.

CODE REFERENCE: UFC 3-460-01 Section 2-18.C

RECOMMENDATION: Provide tank shell with an emergency responder diamond.

f. External Shell Coating

OBSERVATION: External coating exhibits significant chalking, indicating the polyurethane top coat is near the end of its life cycle. Coating exhibits flaking, deterioration, corrosion staining, and base metal exposure with surface corrosion.

CODE REFERENCE: UFC 3-460-02, Section 8-3.10

RECOMMENDATION: Provide approximately 4,500 ft2 (100%) of coating to the external tank shell.

Prior to recoat, perform a coating condition assessment of the external tank shell to assess remaining life of the base coat.

g. External Shell Product Labeling

OBSERVATION: Current product designation and tank identification labeling is fading and peeling.

CODE REFERENCE: UFC 3-460-01 Section 2-18

RECOMMENDATION: Provide tank with product designation and tank identification labeling.

h. Tell-Tale Holes

OBSERVATION: Tell-tale holes provided at reinforcement pads are weeping.

CODE REFERENCE: UFC 3-460-03 Section 8-9.13.4.1.B

RECOMMENDATION: Provide white lithium grease to shell nozzle reinforcement pad tell-tale holes.

Grease is required to prevent water ingress, insect infestation, and build-up of debris.

i. Product Labeling and Flow Arrows at Piping

OBSERVATION: Product designation labeling is currently only provided at containment penetrations.

Labeling provided has begun to fail and peel.

CODE REFERENCE: UFC 3-460-01 Section 2-18

RECOMMENDATION: Provide main suction and receipt piping with product designation labeling and flow arrows.

j. Pipe Wrapping

OBSERVATION: Main suction, receipt and recirculation piping are provided with wrapping at the bottom of the piping. Wrapping prevents full examination of piping and traps water against the pipe.

CODE REFERENCE: UFC 3-460-03 Section 6-1.5.A

RECOMMENDATION: Remove wrapping and perform an API 570 inspection on the main suction, receipt and recirculation piping.

k. Containment

OBSERVATION: Material provided at dike penetrations for the AFFF piping has degraded and may no longer be providing an adequate seal.

CODE REFERENCE: UFC 3-460-03 Section 8-10.6

RECOMMENDATION: Verify that the containment is liquid tight at the AFFF containment penetrations and if seals are found to be inadequate provide boot or link type seals at containment penetrations.

l. Conduit Penetrations

OBSERVATION: Sealant is not provided at the containment dike penetrations for the conduit lines.

CODE REFERENCE: UFC 3-460-03 Section 8-10.6

RECOMMENDATION: Provide 2 linear feet of sealant at conduit penetration along the east wall of the containment dike.

m. Containment Dike

OBSERVATION: Containment is provided via a FML covered by approximately 6” of soil and vegetation. FML integrity cannot be verified due to limited visibility.

CODE REFERENCE: UFC 3-460-01 Section 8-14.1 and UFC 3-460-03 Section 8-10.5

RECOMMENDATION: Replace current containment dike with a standard concrete containment dike.

n. Data Plate

OBSERVATION: Tank is not provided with a data plate.

CODE REFERENCE: API 653 Section 13.1.2

RECOMMENDATION: Provide tank shell with a data plate located adjacent to manway 1.

o. AFFF Piping

OBSERVATION: Crevice corrosion was observed at the interface between the carbon steel AFFF piping and stainless-steel support.

CODE REFERENCE: AW 78-24-27 Sheet CD.11

RECOMMENDATION: Provide Teflon isolation pad or equivalent at six (6) AFFF supports and U-bolt connections.

p. Vito Temperature/water Combination Probe

OBSERVATION: Tank is not provided with a Vito temperature/water combination probe.

CODE REFERENCE: UFC 3-460-01 Table 8-1.S

RECOMMENDATION: Provide the tank with one (1) 8” roof flanged nozzle and install one (1) Vito temperature/water combination probe as close to the perimeter sump as feasible.

q. Tank Foundation

OBSERVATION: Current ringwall has tank resting on grade level. Vegetation, soil, and water was observed resting on the tank chime.

CODE REFERENCE: UFC 3-460-01 Table 8-8.5.A

RECOMMENDATION: Provide the tank with an elevated ring wall. Current ring wall has tank resting on grade level. At a minimum, implement routine program for removing all soil and vegetation from the tank chime.

r. Valve Handles

OBSERVATION: Carbon steel handles provided at four (4) stainless-steel ball valves on the receipt and main suction crossover piping have deteriorated as a result of galvanic corrosion.

CODE REFERENCE: UFC 3-460-01, Section 3-6.7.2

RECOMMENDATION: Replace four (4) carbon steel ball valve handles with stainless steel handles. Two

(2) ball valve handles are located on the receipt crossover piping, and two (2) ball valve handles are located on the main suction crossover piping.

s. Manual Gauging Hatch

OBSERVATION: Tank is not provided with a manual gauging hatch for gauging operations.

CODE REFERENCE: UFC 3-460-01 Table 8-1.S

RECOMMENDATION: Provide the tank with a manual gauging hatch via one (1) 10” roof flanged nozzle and a fully slotted aluminum stilling well. The stilling well should extend to within 3” of the tank bottom and a datum plate should be installed to establish a gauging zero point.

t. Water Draw-Off System and Product Recovery Tank (PRT)

OBSERVATION: Tank is not provided with a water draw-off system and PRT. Water draw-off line is provided with a ball valve.

CODE REFERENCE: UFC 3-460-01 Section 8-3.14 and AW 78-24-27 Sheet D.13 Detail 5

RECOMMENDATION: Provide a water draw-off system with a PRT. Install a ½” stainless steel piping between the PRT and HLA/HHLA chambers to facilitate wet-testing of each float chamber.

u. Pipe Support

OBSERVATION: The low suction pipeline is not provided support, causing the entire weight of piping and the associated DB&B valve to impact the tank shell.

CODE REFERENCE: AW 78-24-27 Sheet D.02

RECOMMENDATION: Provide one (1) support for the low suction line.

v. Bearing Plates on Tank Shell

OBSERVATION: Support rods are partially welded to shell with signs of corrosion staining at connection points.

CODE REFERENCE: BMP

RECOMMENDATION: Provide sixty-four (64) bearing plates to the sixty-four (64) stair support rods, attached directly to the tank shell.

w. Spiral Staircase Upper Platform

OBSERVATION: A through-hole was identified at the upper platform at the spiral staircase. The through hole exhibits active crevice corrosion.

CODE REFERENCE: AW 78-24-27 Sheet D.11

RECOMMENDATION: Provide a 12” circular patch plate over through-hole located on the spiral staircase upper platform.

3. RECOMMENDED REPAIRS as Part of Regular Maintenance

Recommended repairs represent items that should be addressed in a timely manner in order to prevent future potential risks to system operators, equipment integrity, or the adjacent environment.

a. Containment Drainage

OBSERVATION: Due to the existence of soil and vegetation, liquid within the containment area cannot be evaluated for “sheen”. System functionality cannot be verified as functional as current facility procedure waits for liquid within the containment dike to evaporate. Contractors in the adjacent containment area noted water continuously entered dike drain pit despite efforts to continually drain all liquid out.

CODE REFERENCE: BMP

RECOMMENDATION: Perform a hydrostatic test of tank containment drain pit to verify integrity of drain valve and piping.

b. Varec TLG

OBSERVATION: The Varec TLG failed the bump test, indicating the spring may not be actuating the tape adequately leading to inaccurate liquid level readings.

CODE REFERENCE: UFC 3-460-03 Section 8-9.7.1

RECOMMENDATION: Provide repair and maintenance program for the Varec TLG.

D. INSPECTION INTERVALS

Intervals between tank inspections (both internal and external) should be determined by the tank service history, corrosion rates, and regulatory requirements. UFC 3-460-03 provides guidelines for inspection intervals for military facilities. Listed below are the recommended inspection intervals:

4. Routine In-service Inspection

Facility personnel shall perform a visual inspection of the tank exterior surfaces and associated piping.

Gross defects, leaks, shell distortions, signs of settlement, and corrosion should all be monitored along with the foundation condition (including tank chime-to-foundation interface), coating, and appurtenances.

c. Interval: Monthly

5. External Inspection with Ultrasonic Thickness Inspection

An API certified inspector shall perform this inspection every five (5) years or RCA/4N years (where RCA is the difference between the measured shell thickness and the minimum required thickness and N is the shell corrosion rate) whichever is less. This inspection includes inspection requirements of the routine in-service inspection as well as a visual inspection of the tank grounding system (shunts and cables) for damage. Furthermore, an external UT inspection of the tank shell and roof (if applicable) shall be performed by an API certified inspector

d. Interval: Five (5) years; 30 November 2023

6. Internal Inspection

An API certified inspector shall perform the internal inspection every 20 years or ½ remaining life of the tank bottom, whichever is less. This inspection includes a visual inspection of the tank interior surfaces and associated piping and an evaluation of the tank bottom via NDT methods. Internal inspection date is based on recommended inspection interval from the previous API 653 internal inspection report.

e. Interval: March 2026 (API)

*interval based on previous (post repair) inspection dated August 2016

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

API 653 Appendix B Settlement Evaluation

D (ft.)

H (ft.)

Roof Type L

(ft.)

1st Crs Plate

Spec Y

(psi) E

(psi)

45 30 F 17.67 Unknown 30,000 29,000,000

Smax = ((L2 * Y * 11) / 2 * (E * H)) = 0.059

R2 = (Syy – SSE) / Syy = 0.900

Where:

Syy = Sum of the squares of the differences between average measured elevation and the measured elevations, in feet.

SSE = Sum of the square of the differences between the measured and predicted elevations, in feet.

D = Tank diameter, in feet.

H = Tank height, in feet.

Roof Type: F = fixed, O = Open L = Arc length between measurement points, in feet (32' max) (greatest distance allowed based on even # of points).

Y = Yield strength of 1st shell course, in pounds per square inch.

E = Young's modulus, in pounds per square inch.

Θ = Angle theta at elevation point, in degrees.

PE = Predicted elevation, in feet.

Ui = Measured out-of-plane settlement in relation to a cosine curve, in feet.

Si = Deflection, in feet (out-of-plane distortion).

Smax = Maximum allowed deflection, in feet (out-of-plane distortion).

Point Elevation

(ft.)

Θ

(degrees)

PE

(ft.)

Ui

(ft.)

Si

(ft.)

Results

1 0.083 0 0.112 -0.028 -0.014 SAT

2 0.117 45 0.125 -0.008 -0.001 SAT

3 0.125 90 0.112 0.013 0.041 SAT

4 0.033 135 0.079 -0.046 -0.050 SAT

5 0.042 180 0.047 -0.005 0.014 SAT

6 0.042 225 0.033 0.008 0.013 SAT

7 0.042 270 0.047 -0.005 0.001 SAT

8 0.058 315 0.079 -0.021 -0.004 SAT

Base Elevation Max Elevation Δ Elevation

FT. 0.033 0.125 0.092

IN. 0.400 1.500 1.100

Shell Service Life Evaluation

SHELL MINIMUM THICKNESS CALCULATIONS

D (ft)

G E Fill Height

(ft)

45 0.82 0.85 26 tmin =

2.6 * D * (H - 1) * G

S * E

Where:

HL = The height above the bottom of the course of study to the maximum liquid level height of the product, in feet. For corroded or pitted areas, HL = the height from the bottom of the corroded or pitted area to the maximum liquid level height of the product, in feet.

Hc = Height of shell course, in feet.

tmin = The calculated minimum acceptable shell thickness, in inches (cannot be less than 0 for any course), or the minimum acceptable shell thickness allowed by API-653 for tank size, in inches, whichever is greater.

D = Nominal diameter of tank, in feet.

G = Highest specific gravity of the contents (including test water if tank will, or may, be tested in the future).

S = Maximum allowable stress, in pounds per square inch. For welded tanks; use the smaller of 0.80Y of 0.429T for bottom and second course or the smaller of 0.88Y or 0.472T for all other courses. For riveted tanks; S = 21,000 psi.

Y = Specified minimum yield strength of the plate, in pounds per square inch; use 30,000 psi if not known (N/A for riveted tanks).

T = The smaller of the specified minimum tensile strength of the plate or 80,000 psi; use 55,000 psi if not known (N/A for riveted tanks).

E = Original joint efficiency for the tank. For welded tanks; use API-653, Table 2-1.

Note: Use E = 1.0 when evaluating the retirement thickness in a corroded plate, when away from welds or joints by at least the greater of one inch or twice the plate thickness. For riveted tanks; use E = 1.0 for shell plates greater than 1 inch away from rivets; use the value of E from API-653 Table 2-1 when within 1 inch of rivets.

Material Hc (ft.) HL (ft.) S (psi.) tmin (in)

Course 1 Unknown 6 26.0 23600 0.120

Course 2 Unknown 6 20.0 23600 0.100

Course 3 Unknown 6 14.0 26000 0.100

Course 4 Unknown 6 8.0 26000 0.100

Course 5 Unknown 6 2.0 26000 0.100

SHELL REMAINING LIFE CALCULATIONS

CA = tact - tmin

CR = (tprev – tact) / YR

RL = CA / CR

FHc = (S * E * tact) / (2.6 * D * G + 1) + (product height below course of interest)

YR = 4 years

CA = Remaining corrosion allowance of the shell course under consideration, in inches.

CR = Corrosion rate of the shell course under consideration, in inches per year.

FHc = Calculated fill height, in feet.

tact = Average thickness measurement of the shell course under consideration, as recorded at the time of inspection, in inches.

tmin = Minimum required thickness of shell course, at the maximum allowable fill height, in inches.

tprev = Previous thickness measurement of shell course under consideration, as recorded at last inspection or nominal thickness if no previous thickness measurements, in inches.

RL = Estimated remaining life of the shell course under consideration, in years.

YR = Time span between thickness readings or age of the tank if nominal thickness is used for tprev, in years.

D = Nominal diameter of tank, in feet.

G = Highest specific gravity of the contents (including test water if tank will, or may, be tested in the future).

S = Maximum allowable stress, in pounds per square inch. For welded tanks; use the smaller of 0.80Y of 0.429T for bottom and second course or the smaller of 0.88Y or 0.472T for all other courses. For riveted tanks; S = 21,000 psi.

E = Original joint efficiency for the tank. For welded tanks; use API-653, Table 2-1.

Note: Use E = 1.0 when evaluating the retirement thickness in a corroded plate, when away from welds or joints by at least the greater of one inch or twice the plate thickness. For riveted tanks; use E = 1.0 for shell plates greater than 1 inch away from rivets; use the value of E from API-653 Table 2- 1 when within 1 inch of rivets.

Course tprev

(in.)

tact

(in.)

tmin (in.)

CA

(in./yr.)

CR

(in./yr.)

RL

(yrs.)

FHc

(ft.)

Course1 0.249 0.252 0.120 0.132 0.0000 >40 53.69

Course2 0.245 0.255 0.100 0.155 0.0000 >40 60.32

Course3 0.246 0.258 0.100 0.158 0.0000 >40 72.43

Course4 0.249 0.257 0.100 0.157 0.0000 >40 78.20

Course5 0.245 0.256 0.100 0.156 0.0000 >40 83.97

SHELL INSPECTION INTERVALS

Interval to Next Formal External Inspection = CA/4 or 5 years maximum

CR = Corrosion rate of the shell course under consideration, in inches per year.

CA = Remaining corrosion allowance of the shell course under consideration, in inches.

tact = Average thickness measurement of the shell course under consideration, as recorded at the time of inspection, in inches.

tmin = Minimum required thickness of shell course, at the maximum allowable fill height, in inches.

tprev = Previous thickness measurement of shell course under consideration, as recorded at last inspection or nominal thickness if no previous thickness measurements, in inches.

YR = Time span between thickness readings or age of the tank component if tnom is used for tprev, in years.

Shell Course tprev (in.) tact (in.)

YR

(yrs.)

CR

(in./yr.)

tmin (in.)

CA

(in.)

Next External

(yrs.)

1 0.249 0.252 4 0.0000 0.120 0.132 5 2 0.245 0.255 4 0.0000 0.100 0.155 5 3 0.246 0.258 4 0.0000 0.100 0.158 5 4 0.249 0.257 4 0.0000 0.100 0.157 5 5 0.245 0.256 4 0.0000 0.100 0.156 5

Table 1 - Shell Ultrasonic Thickness Readings

Roof

Shell Course

Plate 5-1 Plate 5-2 Plate 5-3 Plate 5-4 Plate 5-5 Plate 5-6

.256 .256 .256

.257 .258 .256

.255 .259 .255

Avg. .256

Circumferential Weld C5

Course

Plate 4-1 Plate 4-2 Plate 4-3 Plate 4-4 Plate 4-5 Plate 4-6

.259 .258 .255

.260 .259 .253

.259 .256 .252

Avg. .257

Circumferential Weld C4

Course

Plate 3-1 Plate 3-2 Plate 3-3 Plate 3-4 Plate 3-5 Plate 3-6

.257 .255 .258

.256 .258 .261

.257 .259 .259

Avg. .258

Circumferential Weld C3

Course

Plate 2-1 Plate 2-2 Plate 2-3 Plate 2-4 Plate 2-5 Plate 2-6

.256 .256 .253

.257 .254 .252

.255 .253 .256

Avg. .255

Circumferential Weld C2

Shell Course

Plate 1-1 Plate 1-2 Plate 1-3 Plate 1-4 Plate 1-5 Plate 1-6 Plate 1-7

.251 .252 .254 .258 .252 .255 .255 .242 .255 .252 .247 .252 .253 .249 .248 .247 .251 .255 .258 .258 .256

.245 .253 .256 .254 .257 .255 .256 .254 .257 .253 .253 .254 .255 .249 .250 .254 .250 .253 .260 .259 .256

.243 .253 .208 .246 .256 .250 .250 .256 .255 .241 .243 .252 .251 .249 .252 .245 .253 .250 .247 .258 .257

Avg. .246 .254 .253 .250 .251 .251 .257

Circumferential Weld C1

Thickness readings are in inches.

Thickness readings on shell courses 2 through 5 were taken using the spiral staircase for access.

Average Shell Course 1: 0.252” Average Shell Course 2: 0.255” Average Shell Course 3: 0.257”

Average Shell Course 4: 0.257” Average Shell Course 5: 0.256” Refer to Drawing A-1, Shell Roll-Out, for shell plate locations.

Table 2 - Nozzles and Appurtenances

Nozzle Nozzle Size

(Diameter or Width/Height)

Repad Shape

Repad Size (W X H)

Repad Thickness

Nozzle Thickness

H1 H2

Nozzle Location (Measured circumferentially from Manway 1)

Notes

0° 90° 180° 270°

MW1 32" A 82" x 66” .264 .260 .253 .254 .252 3’-1" 0’-4" 0" Manway

N1 1 1/2" - - - .205 - - - 0’-10” 0’-9" 12’-0” Water Draw-Off

N2 6" A 20" x 16” .304 .271 .275 .281 .270 1’-3" 0’-7" 12'-3" Low Suction

N3 6" A 20" x 16” .248 .402 .411 .464 .426 1’-3" 0’-7" 16'-0” Main Suction

N4 6" A 20" x 16” .252 .422 .415 - .483 1’-3" 0’-7" 17'-6" Receipt

N5 1 1/2" - - - - - - - 2’-9” 2’-8" 25'-2" Plug

N6 1" - - - .154 - - - 23’-5” 23'-4" 61'-2" HLA / HLCV

N7 1" - - - .151 - - - 3’-7” 3'-6" 59'-10" LLA

N8 1" - - - .153 - - - 2’-1” 2'-0" 59'-10" LLA

N9 1" - - - .169 - - - 28’-6” 28'-5" 63'-0” HHLA / HLCV

N10 - - - - - - - - - - 75'-0” AFFF

MW2 20" A 50" x 44” .524 .468 .450 .459 .432 2’-5" 0’-7" 88'-0” Manway

Thickness measurements are in inches.

H1 = C/L of pipe to edge of roof or chime H2 = Edge of tank or chime to nearest weld toe.

TH = Threaded Repad Shapes

Table 3 - Dry Film (Coating) Thickness

External Shell Coating Thickness

Average Standard Deviation Number of Readings Minimum Maximum

19.770 6.281 46 5.601 35.870

TANK

FOUNDATION

6'-0"

6'-0"

6'-0"

6'-0"

6'-0"

MW1

N1

N2 N3

N4

N5

VAREC

TLG

SPIRAL STAIRCASE

W/ UPPER PLATFORM

N6

N7

N8

N9 N10

MW2

INSERT PLATES

(TYP.)

GROUNDING CABLE

CONNECTION (TYP.3)

AFFF PIPE SUPPORT

(TYP.3)

1-1 1-2

1-3

1-4

1-5 1-6 1-7

2-1 2-2 2-3 2-4 2-52-6

3-1 3-2 3-3 3-4 3-53-6

4-1 4-2 4-3 4-4 4-5 4-6

5-1 5-2 5-3 5-4 5-55-6

HLCV CONDUIT

SUPPORTS (TYP.8)

C O

N T

R A

C T

N

O

F I L E

A M

E

D W

N

B

Y

C K

D

B

Y

D E

S I G

N E

D

B

Y

D E

S C

R I P

T I O

N

D

2 3

C

4 5

A

B

M A

R K

A P

P R

D A

T E

F I

U M

B E

R

S I Z

E

S U

B M

I T

T E

D

B

Y

P L O

T

S

C A

L E

P

L O

T

D

A T

E

D A

T E

M A

R K

D E

S C

R I P

T I O

N

T A

S K

R D

E R

SHEET

IDENTIFICATION

D A

T E

A P

P R

SHEET OF

N T

S

N A

W F

F

X

P a r k w a y

L a n e

S u i t e

P e a c h t r e e

C o r n e r s

G

A

P h o n e

F a x

J O

B

N

O

J G

C

A E

C

N A

TANK INFORMATION

TANK NO. (FACILITY NO.): TANK 13

MANUFACTURER: UNKNOWN

YEAR BUILT: 1951

TANK DIAMETER: 45'-0"

TANK HEIGHT: 30'-0"

NOMINAL CAPACITY: 8,500 BBLS

PRODUCT: JP-5

PRODUCT SPECIFIC GRAVITY: .82

GPS COORDINATES: N 8.727831°

E 167.737571°

U N

I T

A

T E

S

A

R M

Y

U

S A

C E

C O

F

E

N G

I N

E E

R S

R E

P U

B L I

M

A R

S H

A L L

I S

L A

N D

S

M

Y

K

W A

J A

L E

O

L L

A P

I

R

V I C

E

I N

S P

E C

T I O

N

N A

W F

D A

W

S H

E L

L

R

O L

L O

U T

A-1

NOTES:

1. REFER TO TABLE 1, "SHELL PLATE ULTRASONIC

THICKNESS READINGS" IN APPENDIX A FOR THE

INDIVIDUAL SHELL PLATE UTT READINGS.

5. REFER TO TABLE 2, "NOZZLES AND APPURTENANCES" IN

APPENDIX A FOR NOZZLE DATA.

LEGEND:

- COATING FAILURE

OSHA Access Structure Report

OSHA Stairway Data

OSHA Required

Handrail Actual (in) Min (in)

Max (in)

Pass/Fail

Height: 34 30 37 Pass

Width: 44 28 Pass

APPENDIX B: 3-D DOCUMENTATION AND ANALYSIS

N T

R A

F I

M

E

D W

N

B

Y

C K

D

B

Y

D E

S I G

N E

D

B

Y

D E

S C

R I P

T I O

N

D

2 3

C

4 5

A

B

M A

R K

A P

P R

D A

T E

F I

M

B E

R

S I Z

E

S U

B M

I T

T E

D

B

Y

P L O

T

S

C A

L E

P

L O

T

D

A T

E

D A

T E

M A

R K

D E

S C

R I P

T I O

N

T A

D

E R

SHEET

IDENTIFICATION

D A

T E

A P

P R

SHEET OF

N T

S

N A

W

F

F r k w a y

L a n e

S u i

P e a c h t r e e

C o r n e r s

G

A

P h o n e

F a x

J O

B

N

O

J G

C

J G

C

N A

TANK INFORMATION

TANK NO. (FACILITY NO.): TANK 13

MANUFACTURER: UNKNOWN

YEAR BUILT: 1951

TANK DIAMETER: 45'-0"

TANK HEIGHT: 30'-0"

NOMINAL CAPACITY: 8,500 BBLS

PRODUCT: JP-5

PRODUCT SPECIFIC GRAVITY: .82

GPS COORDINATES: N 8.727831°

E 167.737571°

U N

I T

A

T E

S

A

R M

Y

U

S A

C E

C O

E

N G

I N

E E

R S

R E

P U

B L

M

A R

S H

A L L

I S

L A

N D

S

M

Y

K

W A

J A

L E

O

L L

A P

I

O

U T

O

F R

O U

N D

N E

R

V E

Y

N A

W

F

D

D A

W

P O

I N

T

C

L O

H

A

T

M

N T

R A

F I

M

E

D W

N

B

Y

C K

D

B

Y

D E

S I G

N E

D

B

Y

D E

S C

R I P

T I O

N

D

2 3

C

4 5

A

B

M A

R K

A P

P R

D A

T E

F I

M

B E

R

S I Z

E

S U

B M

I T

T E

D

B

Y

P L O

T

S

C A

L E

P

L O

T

D

A T

E

D A

T E

M A

R K

D E

S C

R I P

T I O

N

T A

D

E R

SHEET

IDENTIFICATION

D A

T E

A P

P R

SHEET OF

N T

S

N A

W

F

F r k w a y

L a n e

S u i

P e a c h t r e e

C o r n e r s

G

A

P h o n e

F a x

J O

B

N

O

J G

C

J G

C

N A

TANK INFORMATION

TANK NO. (FACILITY NO.): TANK 13

MANUFACTURER: UNKNOWN

YEAR BUILT: 1951

TANK DIAMETER: 45'-0"

TANK HEIGHT: 30'-0"

NOMINAL CAPACITY: 8,500 BBLS

PRODUCT: JP-5

PRODUCT SPECIFIC GRAVITY: .82

GPS COORDINATES: N 8.727831°

E 167.737571°

U N

I T

A

T E

S

A

R M

Y

U

S A

C E

C O

E

N G

I N

E E

R S

R E

P U

B L

M

A R

S H

A L L

I S

L A

N D

S

M

Y

K

W A

J A

L E

O

L L

A P

I

O

U T

O

F R

O U

N D

N E

R

V E

Y

N A

W

F

D

D A

W

N T

R A

F I

M

E

D W

N

B

Y

C K

D

B

Y

D E

S I G

N E

D

B

Y

D E

S C

R I P

T I O

N

D

2 3

C

4 5

A

B

M A

R K

A P

P R

D A

T E

F I

M

B E

R

S I Z

E

S U

B M

I T

T E

D

B

Y

P L O

T

S

C A

L E

P

L O

T

D

A T

E

D A

T E

M A

R K

D E

S C

R I P

T I O

N

T A

D

E R

SHEET

IDENTIFICATION

D A

T E

A P

P R

SHEET OF

N T

S

N A

W

F

F r k w a y

L a n e

S u i

P e a c h t r e e

C o r n e r s

G

A

P h o n e

F a x

J O

B

N

O

J G

C

J G

C

N A

TANK INFORMATION

TANK NO. (FACILITY NO.): TANK 13

MANUFACTURER: UNKNOWN

YEAR BUILT: 1951

TANK DIAMETER: 45'-0"

TANK HEIGHT: 30'-0"

NOMINAL CAPACITY: 8,500 BBLS

PRODUCT: JP-5

PRODUCT SPECIFIC GRAVITY: .82

GPS COORDINATES: N 8.727831°

E 167.737571°

U N

I T

A

T E

S

A

R M

Y

U

S A

C E

C O

E

N G

I N

E E

R S

R E

P U

B L

M

A R

S H

A L L

I S

L A

N D

S

M

Y

K

W A

J A

L E

O

L L

A P

I

O

U T

O

F R

O U

N D

N E

R

V E

Y

N A

W

F

D

D A

W

A P

I

Q

U I R

E M

E N

APPENDIX C: API 653 CHECKLISTS FOR TANK INSPECTION

Tank In-Service Inspection Checklist

Item Completed

C.1.1 Foundation

Measure foundation levelness and bottom elevations (see Annex A for extent of measurements).

X

C.1.1.1 Concrete Ring a Inspect for broken concrete, spalling, and cracks, particularly under backup bars used in welding butt-welded annular rings under the shell.

X b Inspect drain openings in ring, back of water draw basins, and top surface of ring for indications of bottom leakage.

X c Inspect for cavities under foundation and vegetation against bottom of tank. X d Check that runoff rainwater from the shell drains away from tank. X e Check for settlement around perimeter of tank. X

C.1.1.2 Asphalt a Check for settling of tank into asphalt base which would direct runoff rain water under the tank instead of away from it.

N/A b Look for areas where leaching of oil has left rock filler exposed, which indicates hydrocarbon leakage.

N/A

C.1.1.3 Oiled Dirt or Sand

Check for settlement into the base which would direct runoff rain water under the tank rather than away from it.

C.1.1.4 Rock

Presence of crushed rock under the steel bottom usually results in severe underside corrosion. Make a note to do additional bottom plate examination (ultrasonic, hammer testing, or turning of coupons) when the tank is out of service.

N/A

C.1.1.5 Site Drainage a Check site for drainage away from the tank and associated piping and manifolds.

X b Check operating condition of the dike drains. X

C.1.1.6 Housekeeping

Inspect the area for buildup of trash, vegetation, and other inflammables buildup.

C.1.1.7 Cathodic Protection

Completed

X

Review cathodic protection potential readings. N/A

C.1.2 Shells

C.1.2.1 External Visual Inspection a Visually inspect for paint failures, pitting, and corrosion. X b Clean off the bottom angle area and inspect for corrosion and thinning on plate and weld.

X c Inspect the bottom-to-foundation seal, if any. X

C.1.2.2 Internal (Floating Roof Tank)

Visually inspect for grooving, corrosion, pitting, and coating failures. N/A

C.1.2.3 Riveted Shell Inspection a Inspect external surface for rivet and seam leaks. N/A b Locate leaks by sketch or photo (location will be lost when shell is abrasive cleaned for painting).

N/A c Inspect rivets for corrosion loss and wear. N/A d Inspect vertical seams to see if they have been full fillet lap-welded to increase joint efficiency.

N/A e If no record exists of vertical riveted seams, dimension and sketch (or photograph) the rivet pattern: number of rows, rivet size, pitch length, and note whether the joint is butt-riveted or lap-riveted.

N/A

C.1.2.4 Wind Girder (Floating Roof Tanks) a Inspect wind girder and handrail for corrosion damage (paint failure, pitting, corrosion product buildup), especially where it occurs at tack-welded junction, and for broken welds.

N/A b Check support welds to shell for pitting, especially on shell plates. N/A c Note whether supports have reinforcing pads welded to shell. N/A

C.1.3 Shell Appurtenances

C.1.3.1 Manways and Nozzles a Inspect for cracks or signs of leakage on weld joint at nozzles, manways, and reinforcing plates.

X b Inspect for shell plate dimpling around nozzles, caused by excessive pipe deflection.

X c Inspect for flange leaks and leaks around bolting. X d Inspect sealing of insulation around manways and nozzles. N/A e Check for inadequate manway flange and cover thickness on mixer manways.

N/A

C.1.3.2 Tank Piping Manifolds a Inspect manifold piping, flanges, and valves for leaks. X b Inspect firefighting system components. X c X

Completed

X Check for anchored piping which would be hazardous to the tank shell or bottom connections during earth movement.

d Check for adequate thermal pressure relief of piping to the tank. X e Check operation of regulators for tanks with purge gas systems. N/A f Check sample connections for leaks and for proper valve operation. N/A g Check for damage and test the accuracy of temperature indicators. N/A h Check welds on shell-mounted davit clips above valves 6 in. and larger. N/A

C.1.3.3 Autogauge System a Inspect autogauge tape guide and lower sheave housing (floating swings) for leaks.

X b Inspect autogauge head for damage. X c Bump the checker on autogauge head for proper movement of tape. X d Identify size and construction material of autogauge tape guide (floating roof tanks).

N/A e Ask operator if tape tends to hang up during tank roof movement (floating roof tanks).

X f Compare actual product level to the reading on the autogauge (maximum variation is 2 in.).

X g On floating roof tanks, when the roof is in the lowest position, check that no more than two feet of tape are exposed at the end of the tape guide.

N/A h Inspect condition of board and legibility of board-type autogauges. N/A i Test freedom of movement of marker and float. N/A

C.1.3.4 Shell-Mounted Sample Station a Inspect sample lines for function of valves and plugging of lines, including drain or return-to-tank line.

N/A b Check circulation pump for…