Attachment J.1 Kwajalein -Fac 954 (Tank 16 - Ext Final-2018.pdf

US Army Corps of Engineers Omaha District

API 653 In-Service Inspection Report

US Army Garrison Kwajalein Atoll (USAG-KA) Facility 954

Tank 16 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

1. Routine In-Service Inspection

2. External Inspection with Ultrasonic Thickness Inspection

3. 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- Fixed Roof Ultrasonic Thickness Measurements

Fixed Roof Service Life Evaluation

Table 3- Nozzles and Appurtenances

Drawing A-1 – Shell Roll-Out

Drawing A-2 – Fixed Roof Layout

OSHA Access Structure Report

Table 4 – Dry Film (Coating) Thickness

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 INSPECTIONS

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

RMI Republic of Marshall Islands

TLG Tape Level Gauge

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 16 (Facility 954) at USAG-KA in the Republic of the Marshall Islands (RMI).

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

Results of this inspection and testing activities identified recommended repairs and upgrades required to comply with API 650/653, United Facilities Command (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: 28-29 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 Model Number: 2000 High Precision Altimeter 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: May 2014 API In-Service (External) Inspection Date: May 2014

RECOMMENDED FUTURE INSPECTION DATES

Routine In-Service: Monthly Out-of-Service (Internal): May 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

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner U.S. Army

Location USAG-KA, RMI

Facility Number 954

Tank Number 16

Inspection Date 28 – 30 November 2018

Tank Manufacturer Unknown

Design Standard* API 12C*

Date of Construction 1954

Tank Contents Diesel (F-76)

Tank Diameter 45’-0”

Shell Height 48’-0”

Safe Fill* 46’-0”

Tank Capacity 13,000 Barrels (BBL) (567,000 Gallons)

Foundation Concrete Ring Wall

Construction

Bottom* Lap-Welded / Sixteen (16) Bottom Plates

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

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

Fixed Roof Lap-Welded Steel Plates / Thirty (30) Plates

Material

Bottom Carbon Steel

Shell Carbon Steel

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

Fixed Roof Carbon Steel

Cathodic Protection* Impressed Current Cathodic Protection (ICCP) System

Interior Coating System N/A – External Inspection

Exterior Coating System Two (2) Coat Epoxy with Polyurethane Topcoat

Level Gauging Varec 2500 Float Gauge / Enraf Automatic Tank Gauge (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 2” 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 May 2016.

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection

An in-service (external) API 653 inspection was performed 28-30 November 2018 for Tank 16 (Facility

954). 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 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 16 is a welded, steel, single-wall, Diesel (F-76), vertical, 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 1954. Tank 16 is 45’-0” in diameter and 48’-0” high with a nominal capacity of 13,000 BBL (567,000 gallons). The previous Out-of-Service (OOS) inspection report, dated September 2014, and post-repair inspection report, dated September 2016, were available for review and comparison.

2. Tank Foundation

Tank 16 rests on an elevated concrete ring wall foundation. Foundation is in good overall condition with no indications of spalling or cracking. A settlement evaluation was performed during the inspection. 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 seven (7) butt-welded steel shell 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. UTT measurements indicated no significant metal loss on shell plates.

The tank shell is not provided with an National Fire Protection Agency (NFPA) emergency responder diamond to identify hazard ratings for health, flammability, and instability. The ratings aid emergency responders in quickly assessing the severity of the situation and to allow a proper response. Grounding conduit provided for the tank is open to the environment, allowing fluids to escape the containment in the event of a spill. Tank 16 is not provided with a data plate.

Two (2) locations of general pitting on the exterior of the 1st shell course, adjacent to manway 1, were identified. Pitting was observed at a height of 2’-0” and 5’-0”, with max pit depths of 0.080” and 0.110”, respectively. Pitting is not considered active as it is coated. Pitting does not exceed minimum thickness criteria to affect safe liquid level. These locations should be monitored in future inspections.

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 cone-up construction with fully coated, lap-welded steel plates. Fixed roof plates were examined using UTT and VT methods. Five (5) UTT measurements were taken on each fixed roof plate.

UTT measurements indicated no significant metal loss on fixed roof plates.

The fixed roof is provided with a partial handrail. Without adequate fall protection, there is no means to safely access the Enraf ATG or other appurtenances. Seven (7) conduit supports located on the fixed roof are stitch welded exhibits coating failure and crevice corrosion. The tank roof is not provided with an 8” flanged nozzle equipped with a Vito temperature/water probe. The Vito temperature/water probe should be located as close to the sump as possible.

Wide-spread pitting was observed on the fixed roof. At the time of the inspection, none of the pitting exceeds the API 653 requirement that no 100 in2 area shall have an average thickness of less than 0.090”.

Furthermore, all pitting was coated and can be considered inactive. These locations should be monitored throughout future inspections.

Refer to Drawing A-2, “Fixed Roof Layout”, and Table 2, “Fixed Roof Ultrasonic Thickness Readings”, in

Appendix A for plate location and thickness data.

6. Tank Appurtenances

a. Tank Shell

Shell nozzles consist of twelve nozzle penetrations: two (2) 20” manways, one (1) 1” plug, one (1) 2” low suction, one (1) 6” main suction, one (1) 6” receipt, one (1) 1” HLA /HLCV float pilot, one (1) HHLA / HLCV float pilot, two (2) 1” LLA penetrations, one (1) aqueous film forming foam (AFFF) penetration, and one (1) 6” blind flange. Shell nozzles and reinforcement pads were examined using UTT and VT methods. One (1) UTT measurement was taken on each nozzle with a welded connection less than 2”, and four (4) UTT measurements were taken on each nozzle with a welded connection over 2”. One (1) UTT measurement was taken on each associated reinforcement pad. UTT measurements indicated no significant metal loss on nozzles and associated reinforcement pads.

Hardware provided for manway 1 and manway 2 exhibit coating failure and metal loss.

Crossover piping provided for the receipt and main suction are provided stainless steel piping and flanges. These stainless-steel flanges are attached directly to carbon steel flanges of the carbon steel piping. The HLA / HLCV, HHLA / HLCV, and LLA are provided similar configurations. This configuration causes significant deterioration of carbon steel components due to galvanic corrosion.

Refer to Refer to Drawing A-1, “Shell Roll-Out”, and Table 3, “Nozzles and Appurtenances”, in

Appendix A for nozzle location and data.

b. Fixed Roof

Fixed roof nozzles consist of eight (8) nozzle penetrations: one (1) 24” manway with 4” Enraf

ATG, two (2) 2” penetrations for the Varec 2500B tape level gauge (TLG) guide wires, one (1)

2 ½” penetration for the Varec TLG, one (1) 4” anchor mount, one (1) 24” inspection hatch, one (1) 8” manual gauging hatch, and one (1) 6” perimeter vent. Fixed roof nozzles and reinforcement pads were examined using UTT and VT methods. Four (4) UTT measurements were taken on each nozzle with a welded connection over 4”, and one (1) UTT measurement was taken on each associated reinforcement pad. UTT measurements indicated no significant metal loss on nozzles and associated reinforcement pads.

Refer to Refer to Drawing A-2, “Fixed Roof Layout,” and Table 3, “Nozzles and

Appurtenances,” in Appendix A for nozzle location and data.

c. Gauging

The tank is provided with an 8” manual gauging hatch for manual operations, a 4” Enraf ATG system mounted on manway 3 for automatic tank gauging, and a Varec 2500B TLG for monitoring product level from the ground. Inspection of stilling wells was not possible due to inaccessibility. The Varec TLG failed the bump check at the time of the indication, indicating the spring is not actuating the tape, potentially causing an inaccurate level reading.

d. Level Alarms

The tank is provided with independent shell-mounted HLA/HHLA and LLA systems.

e. Stairs and Platforms

The tank is provided with a spiral staircase and one (1) upper platform for fixed roof access.

Sixty-four (64) stair treads are stitch welded to the shell, allowing for crevice corrosion.

Coating failure and crevice corrosion were observed at the stair treads. The spiral staircase does not have a concrete pad beneath the first step, creating a safety hazard for personnel accessing the fixed roof, HLA, HHLA, HLCV float pilot, and the AFFF.

f. Grounding and Bonding

The tank shell is equipped with two (2) grounding lugs and cables. Grounding cables are in good overall condition with no signs of damage nor deterioration.

7. Tank Coating

Tank 16 is provided with a two (2) coat epoxy one (1) topcoat polyurethane coating system applied by

Purcell Painting in June 2016. Original average coating thickness ranges from 8-13 mils. MIL-DTL-2441

Formula 159 was used as the primer, and MIL-DTL-2441 Formula 152 was used as the intermediate.

Tank surface was prepared IAW SSPC SP-10 (NACE 2) Near-White Blast Cleaning with an anchor profile of 3 mils. Tank shell coating is in good overall condition. Fixed roof coating is in good overall condition with minor areas of flaking, deterioration, base metal exposure, and surface corrosion.

Coating failure was observed on the spiral staircase, HLA and flange, HHLA and flange, LLA, manway 1 and 2, AFFF piping, low point drains on main suction and receipt piping, and receipt nozzle. Coating displays flaking, deterioration, base metal exposure, and surface corrosion. Coating provided for manway

3 and the 24” inspection hatch and associated hardware displays flaking, deterioration, base metal exposure, and surface corrosion.

8. Tank Piping System

The tank is provided with one (1) 2” low suction, one (1) 6” main suction, one (1) 6” receipt, and one (1)

4” AFFF. The 6” main suction, located at the containment wall penetration, exhibits coating failure and minor metal loss. AFFF piping system is not provided with isolation between pipe supports and piping.

Metal-to-metal contact between dissimilar metals accelerates contact corrosion. Coating failure and crevice corrosion were observed. The AFFF pipe penetrates the ground inside containment. The soil-to-air interface was not accessible for inspection. Acidic and low resistive soils may accelerate corrosion at locations of coating failure.

9. Fire Protection System

For internal fire protection, Tank 16 is provided with an AFFF system.

10. Secondary Containment

Tank 16 is located within an earthen containment dike lined with a flexible membrane liner (FML) and provided with vertical concrete walls. The integrity of the FML could not be verified, as it is currently covered with a 6” layer of soil and vegetation resulting in limited visibility of the FML. According to facility personnel, containment drain pump and piping is not used. Facility allows water to naturally evaporate, therefore, integrity of the containment drain, pump, and piping was unable to be verified due to standing water. Furthermore, this system impedes access to the tank and prevents adequate inspection for sheen.

Conduit inside the containment, adjacent to the 6” receipt double block and bleed (DB&B) valve, is severed and is no longer sealed. One (1) junction box is not sealed and is open to the atmosphere. In the event of a spill, fluid can escape through the junction box support hole on the east side of the containment.

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 0.077’ (0.923”). The deflection is located 1.02’ above the shell-to-bottom weld and 250.8° (arc length of 98.62’) from manway 1. The maximum outward deflection observed was 0.104’

(1.250”). The deflection is located 1.02’ above the shell-to-bottom weld and 363.2° (arc length of 142.8’) 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. 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, UFC, 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.

No mandatory repairs are required for the tank to be removed from service.

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. Junction Box Sealant

OBSERVATION: Conduit junction box is open to the atmosphere, allowing a pathway for fluid to escape the containment dike in the event of a spill.

CODE REFERENCE: UFC 3-460-03 Section 8-10.2.2

RECOMMENDATION: Provide sealant to conduit junction box located at the east containment wall.

b. Grounding Cable Sealant Failure

OBSERVATION: The conduit is open to the atmosphere, allowing a pathway for fluid to escape the containment dike in the event of a spill.

CODE REFERENCE: UFC 3-460-03 Section 8-10.2.2

RECOMMENDATION: Provide sealant to grounding cable conduit, housing the ground rod, adjacent to manway 2 (MW2).

c. Stitch Welded Stair Treads

OBSERVATION: Stair treads are fully 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.

d. Nozzles and Appurtenances Coating Failure

OBSERVATION: Coating on nozzles and appurtenances displays signs of flaking, deterioration, and base metal exposure with surface corrosion.

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

RECOMMENDATION: Provide 264 ft2 of coating repair to the following nozzles and appurtenances:

• Spiral staircase – 25 ft2

• HLA – 5 ft2

• HLA carbon steel flange – 1 ft2

• HHLA – 5 ft2

• HHLA carbon steel flange – 1 ft2

• Main suction – 15 ft2

• LLA – 5 ft2

• Manway 1 (MW1) cover – 4 ft2

• Manway 2 (MW2) cover – 4 ft2

• AFFF piping – 150 ft2 (coat red)

• Main suction low point drain – 5 ft2

• Receipt – 20 ft2

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

• Fixed roof – 6 ft2

• Manual gauging hatch – 8 ft2

• Manway 3 (MW3) – 3 ft2

e. Flange Corrosion

OBSERVATION: Carbon steel flanges are attached directly to stainless steel flanges via stainless steel nuts and bolts. This type of configuration causes 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 – two (2)

• Receipt low point drain – one (1)

• Main suction crossover piping – two (2)

• Main Suction low point drain – one (1)

f. Pipe Metal Loss

OBSERVATION: Coating deterioration with minor metal loss was observed where the main suction piping penetrates the containment dike wall.

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

RECOMMENDATION: Remove two (2) link seals for each of the two (2) locations where the main suction pipe penetrates the containment dike wall and perform an API 570 inspection at these locations.

g. Hardware Corrosion

OBSERVATION: Fasteners exhibit deterioration with minor metal loss.

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

RECOMMENDATION: Replace twenty-eight (28) corroded fasteners at both manway 1 (MW1) and manway 2 (MW2) and eleven (11) corroded fasteners at the 24” fixed roof inspection hatch.

h. Emergency Responder Diamond

OBSERVATION: Tank 16 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 IAW NFPA 704.

i. Conduit Crevice Corrosion

OBSERVATION: Conduit supports are not provided seal welds, allowing water ingress. Crevice corrosion was observed at the conduit support-to-fixed roof interface.

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

RECOMMENDATION: Provide approximately 2 linear feet of seal welds to each of the seven (7) conduit supports located on the fixed roof.

j. Conduit Damage

OBSERVATION: Conduit located adjacent to the receipt DB&B valve is broken, exposing wires.

CODE REFERENCE: BMP

RECOMMENDATION: Replace 1 linear foot of 1” conduit.

k. Pipe-to-Support Isolation

OBSERVATION: Carbon steel AFFF piping is in direct contact with a stainless-steel support, allowing direct metal-to-metal contact between dissimilar metals. Crevice corrosion was observed at the interface.

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

RECOMMENDATION: Provide Teflon isolation pad or equivalent at one (1) AFFF support and U-bolt connection.

l. Pipe-to-Soil Interface

OBSERVATION: AFFF piping exits the containment dike directly through soil. There is no evidence of a reinforced coating at the soil-to-air interface. These locations are susceptible to accelerated corrosion.

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

RECOMMENDATION: Perform soil-to-air inspection of AFFF piping at containment penetration.

m. Vito Temperature/Water Probe

OBSERVATION: Tank 16 is not provided with a Vito temperature/water probe.

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

RECOMMENDATION: Provide the tank roof with one (1) 8” flanged nozzle and provide the flanged nozzle with one (1) Vito temperature / water bottom probe. The nozzle should be configured such that the Vito temperature / water probe is as close to the sump as feasible.

n. Perimeter Roof Handrail

OBSERVATION: Currently, only a partial hand rail is provided, allowing access to the manual gauging hatch. Without fall protection, there is no means to safely access the Enraf ATG.

CODE REFERENCE: AW 78-24-27 SHEET D.11 DETAIL 5

RECOMMENDATION: Provide the tank fixed roof with a full perimeter handrail extending the entire circumference of the roof. A full perimeter handrail should be provided to assist in future maintenance and inspection operations.

o. Spiral Staircase

OBSERVATION: The landing distance between the ground and the first tread is 1’-4”, creating a safety hazard for personnel using the staircase.

CODE REFERENCE: AW 78-24-27 SHEET D.11 DETAIL 4

RECOMMENDATION: Provide one (1) 3’-4” x 0’-8” concrete pad to extend from the tank ring wall to the edge of the spiral staircase hand rail at the base of the spiral staircase.

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 FML

OBSERVATION: Containment is provided by a FML covered with approximately 6” of soil and vegetation. CODE REFERENCE: UFC 3-460-01 Section 8-14.1 and UFC 3-460-03 Section 8-10.5

RECOMMENDATION: Upgrade tank containment dike to standard concrete containment dike.

b. Containment Draining System

OBSERVATION: System functionality cannot be verified as functional as current facility procedure waits for liquid within the containment dike to evaporate.

CODE REFERENCE: BMP

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

c. Varec TLG Malfunction

OBSERVATION: The Varec TLG failed the tape bump test, indicating the spring may not be actuating the tape adequately, potentially causing an inaccurate level gauge reading.

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

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

d. Tank 16 Absent Data Plate

OBSERVATION: Tank 16 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. A data plate will assist in future inspection operations in assessing serviceability.

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:

1. 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.

a. Interval: Monthly

2. 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.

b. Interval: Five (5) years; November 2023

3. 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.

c. Interval: May 2026

*interval based on previous post repair inspection dated May 2016

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

API 653 Appendix B Settlement Evaluation

Base Elev Max Elev Δ Elev

FT 0.742 0.767 0.025 R^2 = 0.406

IN 8.904 9.204 0.300

The optimum cosine used in the shell settlement evaluation per API 653 paragraph B.2.2.4 is invalid as

R^2 is less than 0.9. As an alternative, the evaluation provided in API 653 paragraph B.2.2.5 was used in determining shell settlement.

Base Elev Max Elev Δ Elev

FT 0.742 0.767 0.025

IN 8.904 9.204 0.300

D

(ft.)

H

(ft.)

Roof Type

1st Crs Plt Spec

Y E K

45 48 F Unknown 30,000 29,000,000 10.500

Where:

D = Tank Diameter, in ft

H = Tank Height, in ft

Roof Type: F = fixed, O = Open

Y = Yield strength of shell 1st course , in pounds per Sq.Inch (psi)

E = Young's modulus, in pounds per Sq.Inch (psi)

K = factor from table in B.3.2.2 (API-653 App. B)

PE2 = Predicted elevation (for secondary evaluation), in ft

Sarc = the effective settlement arc length, see B.2.2.5.1, in ft

Si = out-of-plane settlement, in inch

Smax = Maximum allowed out-of-plane settlement, in inch (min(K*Sarc*(D/H)*(Y/E), 4.0)

Point Elevation

(ft.)

Θ

(degrees)

PE2

(ft.)

Sarc (ft.)

Si

(in.)

Smax (in.)

Results

1 0.767 0 0.767 70.7 0.000 0.719 SAT

2 0.742 45 0.763 70.7 0.249 0.719 SAT

3 0.742 90 0.759 70.7 0.198 0.719 SAT

4 0.742 135 0.754 70.7 0.147 0.719 SAT

5 0.750 180 0.750 70.7 0.000 0.719 SAT

6 0.742 225 0.754 70.7 0.147 0.719 SAT

7 0.742 270 0.759 70.7 0.198 0.719 SAT

8 0.742 315 0.763 70.7 0.249 0.719 SAT

Shell Service Life Evaluation

SHELL MINIMUM THICKNESS CALCULATIONS

(ft)

G E Fill Height

(ft)

45 0.88 0.85 46 tmin =

2.6 * D * (H - 1) * G

S * E

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 7 46.0 23600 0.231

Course 2 Unknown 6 39.0 23600 0.195

Course 3 Unknown 7 33.0 26000 0.149

Course 4 Unknown 7 26.0 26000 0.116

Course 5 Unknown 7 19.0 26000 0.100

Course 6 Unknown 7 12.0 26000 0.100

Course 7 Unknown 7 5.0 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

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.)

Course 1 0.306 0.315 0.231 0.084 0.0000 >40 62.37

Course 2 0.273 0.273 0.195 0.078 0.0000 >40 61.19

Course 3 0.268 0.261 0.149 0.112 0.00175 >40 70.02

Course 4 0.252 0.251 0.116 0.135 0.00025 >40 74.88

Course 5 0.252 0.253 0.100 0.153 0.0000 >40 82.31

Course 6 0.251 0.252 0.100 0.152 0.0000 >40 89.09

Course 7 0.256 0.253 0.100 0.153 0.00075 >40 96.31

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 0.306 0.315 4 0.0000 0.231 0.084 5 2 0.273 0.273 4 0.0000 0.195 0.078 5 3 0.268 0.261 4 0.00175 0.149 0.112 5 4 0.252 0.251 4 0.00025 0.116 0.135 5 5 0.252 0.253 4 0.0000 0.100 0.153 5 6 0.251 0.252 4 0.0000 0.100 0.152 5 7 0.256 0.253 4 0.00075 0.100 0.153 5

Table 1 - Shell Ultrasonic Thickness Readings Fixed Roof

Shell Course 7

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

.255 .252 .249

.253 .250 .257

.254 .250 .256

Avg. .253

Circumferential Weld C7

Shell Course 6

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

.249 .250 .249

.252 .249 .256

.248 .258 .256

Avg. .252

Circumferential Weld C6

Shell Course 5

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

.252 .254 .254

.253 .257 .252

.253 .254 .252

Avg. .253

Circumferential Weld C5

Shell Course 4

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

.252 .253 .252

.252 .249 .250

.249 .249 .249

Avg. .251

Circumferential Weld C4

Shell Course 3

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

.265 .266 .266

.266 .268 .250

.258 .263 .251

Avg. .261

Circumferential Weld C3

Shell Course 2

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

.273 .272 .279

.272 .276 .268

.278 .277 .264

Avg. .273

Circumferential Weld C2

Shell Course 1

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

.315 .313 .315 .310 .313 .310 .323 .326 .332 .316 .315 .310 .309 .314 .309 .303 .315 .320

.313 .314 .315 .300 .318 .312 .325 .328 .332 .315 .312 .315 .313 .318 .316 .309 .318 .323

.313 .309 .310 .307 .312 .311 .321 .323 .329 .316 .309 .315 .310 .314 .311 .307 .312 .318

Avg. .313 .310 .327 .314 .313 .314

Circumferential Weld C1

Thickness Represented in inches.

Average Shell Course 1: 0.315” Average Shell Course 2: 0.273” Average Shell Course 3: 0.261 Average Shell Course 4: 0.251

Average Shell Course 5: 0.253 Average Shell Course 6: 0.252 Average Shell Course 7: 0.253

Refer to Drawing A-1 in Appendix for plate numbers.

Table 2- Fixed Roof Ultrasonic Thickness Measurements

Plate 1 Plate 2 Plate 3 Plate 4 Plate 5

.196 .197 .198 .203 .194 .196 .225 .190 .194 .197

.195 .204 .193 .193 .194

.197 .195 .206 .201 .194 .195 .207 .193 .191 .196

Avg. .196 .202 .194 .202 .194

Plate 6 Plate 7 Plate 8 Plate 9 Plate 10

.190 .207 .207 .189 .191 .202 .201 .194 .194 .204

.191 .204 .190 .192 .204

.191 .206 .203 .189 .191 .203 .204 .195 .195 .204

Avg. .197 .198 .195 .197 .200

Plate 11 Plate 12 Plate 13 Plate 14 Plate 15

.203 .195 .197 .191 .188 .193 .193 .190 .189 .199

.205 .191 .193 .185 .198

.203 .197 .190 .189 .191 .189 .190 .192 .197 .199

Avg. .201 .192 .191 .190 .196

Plate 16 Plate 17 Plate 18 Plate 19 Plate 20

.200 .194 .196 .191 .170 .201 .179 .203 .206 .198

.191 .173 .200 .216 .195

.193 .194 .187 .191 .200 .200 .205 .201 .198 .198

Avg. .194 .188 .194 .201 .199

Plate 21 Plate 22 Plate 23 Plate 24 Plate 25

.195 .207 .206 .192 .198 .194 .177 .201 .196 .191

.204 .191 .195 .198 .201

.209 .206 .191 .384 .191 .196 .196 .197 .176 .187

Avg. .204 .233 .195 .194 .190

Plate 26 Plate 27 Plate 28 Plate 29 Plate 30

.187 .187 .186 .187 .206 .188 .201 .204 .187 .191

.187 .188 .191 .209 .206

.188 .190 .181 .191 .191 .191 .197 .207 .173 .191

Avg. .188 .187 .193 .204 .190

Thicknesses are represented in inches.

Average roof plate thickness: 0.197” Refer to Drawing A-2 in Appendix A for plate numbers.

Fixed Roof Service Life Evaluation

CA = tact - tmin

CR = (tprev – tact) / YR

RL = CA / CR

Where;

CA = Remaining corrosion allowance of the tank component under consideration, in inches.

CR = Corrosion rate of the tank component under consideration, in inches per year.

RL = Estimated remaining life of the tank component under consideration, in years.

tact = Actual thickness measurement of the tank component under consideration, as recorded at the time of inspection, in inches.

tmin = Minimum required thickness of tank component, at the design MAWP at the design temperature (200 degF for atm AST's), in inches (greater of psi/wt or 0.090").

tnom = Design nominal thickness of tank component under consideration, in inches.

tprev = Previous thickness measurement of the tank component 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.

ROOF PLATES - REMAINING LIFE

YR

(yrs.)

tprev

(in.)

tact

(in.)

tmin

(in.)

CR

(in.)

CA

(in.)

RL

(yrs.)

4 0.198 0.197 0.090 0.00025 0.107 >40

Table 3- 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 A)

Notes

0° 90° 180° 270°

MW1 20" A 54" x 44" .327 .286 .291 .267 .299 1’-5" 0’-7" 0' Manway 1

N1 1" - - - - - - - 1’-6" 1’-5" 27"-8" Plug

MW2 20" A 54" x 44" .323 .302 .291 .281 .281 1’-6" 0’-8”" 70'-8" Manway 2

N2 - - - - - - - - - - 103'-4" AFFF

N3 2" - - - .148 - - - 0’-10" 0’-9" 105'-10" Low Suction

N4 6" A 22" x 18" .319 .483 .483 .456 .500 1’-0" 0’-4" 109'-9" Main Suction

N5 6" A 22" x 18" .258 .493 .458 .484 .477 1’-0" 0’-4" 112'-6" Receipt

N6 1" - - - .161 - - - 46'-10" 46'-9 1/2" 114'-4" HHLA / HLCV

N7 1" - - - .147 - - - 5’-3" 5’-2" 118'-4" LLA

N8 1" - - - .138 - - - 3’-8" 3’-7" 118'-4" LLA

N9 1" - - - .141 - - - 41'-7" 41'-6 1/2" 120'-1" HLA / HLCV

N10 6" B 20" x 15" - .468 - .446 .403 0’-10" 0’-3" 129'-3" Blind Flange

MW3 24" B 30" .189 .272 .268 .272 .269 Fixed Roof Manway w/ 4" Enraf ATG

N11 2" - - - TH - - - Fixed Roof TLG Guide Wire

N12 2 1/2" - - - TH - - - Fixed Roof TLG

N13 2" - - - TH - - - Fixed Roof TLG Guide Wire

N14 6" B 10" .270 .253 .249 .256 .258 Fixed Roof Perimeter Vent

N15 4" B 16" .485 .202 - - - Fixed Roof Anchor Mount

N16 24" B 34" .251 .221 .249 .244 .251 Fixed Roof Inspection Hatch

N17 8" B 18" .244 .475 .474 .515 .455 Fixed Roof Manual Gauge Hatch

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:

7'-0"

6'-0"

7'-0"

7'-0"

7'-0"

7'-0"

7'-0"

1-1

4-6

7-5

2-1

3-1

4-1

5-1

6-1

7-1

1-2

2-2

3-2

4-2

5-2

6-2

7-2

1-3

2-3

3-3

4-3

5-3

6-3

7-3

1-4

2-4

3-4

4-4

5-4

6-4

7-4

1-5

2-5

3-5

4-5

5-5

6-5

1-6

2-6

3-6

5-6

6-6

7-6

AFFF

SUPPORT

(TYP. 6)

CONDUIT

SUPPORT

(TYP. 5)

TLG SUPPORT

(TYP. 5)

MW1

N1

N2

N3

N4 N5

N6

N9

N7

N8

N10

MW2

2'-0"

5'-0"

0.110

0.080

TANK

FOUNDATION

SPIRAL STAIRCASE W/

UPPER PLATFORM

GROUNDING CABLE

(TYP.2)

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 16 (FAC 954)

MANUFACTURER: UNKNOWN

YEAR BUILT: 1954

TANK DIAMETER: 45'-0"

TANK HEIGHT: 48'-0"

NOMINAL CAPACITY: 13,500 BBL

PRODUCT: F-76 (DIESEL)

PRODUCT SPECIFIC GRAVITY: 0.88

GPS COORDINATES: 8.727221°, 167.737737°

U N

I T

A

T E

S

A

R M

Y

U

S A

C E

C O

R P

S

O

F

E

N G

I N

E E

R S

R E

P U

B L

I

F

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 D

M

S H

E L

L

L

A Y

O U

T

A-1

NOTES:

1. REFER TO TABLE 1, "SHELL ULTRASONIC THICKNESS

READINGS" IN APPENDIX A FOR THE INDIVIDUAL SHELL

PLATE UTT READINGS.

2. REFER TO TABLE 3, "NOZZLES AND APPURTENANCES" IN

APPENDIX A FOR NOZZLE DATA.

LEGEND:

- COATING FAILURE

- PITTING WITH MAX PIT DEPTH

AutoCAD SHX Text x0.110

AutoCAD SHX Text x0.080

LAP PATCH

(TYP.9)

SPIRAL STAIRCASE

W/ UPPER PLATFORM

N16

N17

N15

N14

MW3

N11

N13

N12

21 3 4 5 6

10 11 12 13

18 19 20

222324

25 26 27 28 29 30

CONDUIT SUPPORTS

(TYP.6)

LP

LP

LP

LP LP

LP

LP

LP

LP

C O

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

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 16 (FAC 954)

MANUFACTURER: UNKNOWN

YEAR BUILT: 1954

TANK DIAMETER: 45'-0"

TANK HEIGHT: 48'-0"

NOMINAL CAPACITY: 13,500 BBL

PRODUCT: F-76 (DIESEL)

PRODUCT SPECIFIC GRAVITY: 0.88

GPS COORDINATES: 8.727221°, 167.737737°

U N

I T

A

T E

S

A

R M

Y

U

S A

C E

C O

R P

S

O

F

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

R

V I C

E

I N

S P

E C

T I O

N

N A

W

F

D

A D

M

F I X

O

F

L

A Y

O U

T

A-2

NOTES:

1. REFER TO TABLE 2, "FIXED ROOF ULTRASONIC

THICKNESS READINGS" IN APPENDIX A FOR THE

INDIVIDUAL ROOF PLATE UTT READINGS.

2. REFER TO TABLE 3, "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: 33 30 37 Pass

Width: 36 28 Pass

Table 4 – Dry Film (Coating) Thickness

External Shell Coating Thickness

Average Standard Deviation Number of Readings Minimum Maximum

21.100 5.406 50 9.174 32.270

Roof Coating Thickness

Average Standard Deviation Number of Readings Minimum Maximum

13.580 6.618 35 8.150 43.740

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

T B

D

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

B W

L

A E

C

N A

TANK INFORMATION

TANK NO. (FACILITY NO.): TANK 16

MANUFACTURER: UNKNOWN

YEAR BUILT: 1954

TANK DIAMETER: 45'-0"

TANK HEIGHT: 47'-0"

NOMINAL CAPACITY: 13,576 BBLS

PRODUCT: JP-8

PRODUCT SPECIFIC GRAVITY: .84

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

T B

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

T B

D 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

B W

L

A E

C

N A

TANK INFORMATION

TANK NO. (FACILITY NO.): TANK 16

MANUFACTURER: UNKNOWN

YEAR BUILT: 1954

TANK DIAMETER: 45'-0"

TANK HEIGHT: 47'-0"

NOMINAL CAPACITY: 13,576 BBLS

PRODUCT: JP-8

PRODUCT SPECIFIC GRAVITY: .84

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

T B

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

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SHEET

IDENTIFICATION

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TANK INFORMATION

TANK NO. (FACILITY NO.): TANK 16

MANUFACTURER: UNKNOWN

YEAR BUILT: 1954

TANK DIAMETER: 45'-0"

TANK HEIGHT: 47'-0"

NOMINAL CAPACITY: 13,576 BBLS

PRODUCT: JP-8

PRODUCT SPECIFIC GRAVITY: .84

GPS COORDINATES: N 8.727831°

E 167.737571°

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APPENDIX C: API 653 CHECKLISTS FOR TANK INSPECTIONS

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

Completed

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

X

C.1.1.7 Cathodic Protection

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

Completed

X b Inspect firefighting system components. X c Check for anchored piping which would be hazardous to the tank shell or bottom connections during earth movement.

X 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 leaks and operating problems. N/A c Test bracing and supports for sample lines and equipment. N/A

C.1.3.5 Heater (Shell Manway Mounted)

Inspect condensate drain for presence of oil indicating leakage. N/A

C.1.3.6 Mixer a Inspect for proper mounting flange and support.