Attachment J - External Inspection_Fort Rucker Tank 1 (Facility 25647) Final_2020.pdf

Gilbane Tanks K1002 and W0003 – Post Repair API 653 Inspections

June 19, 2019

All Pond marketing materials are printed on papers containing post-consumer recycled fibers and are FSC Certified.

March 3, 2020

Susie J. Brunotte

Fuels Project Manager

Susie.j.brunotte@usace.army.mil

USACE, Omaha District

Contract Number: W9128F-17-D-0016

Task Order Number: W9128F19F0328

Submittal Number: 015

Per SOW para 2.4.1 & 2.4.1.2, see attached for the following documents:

1. Molinelli Stagefield – Fort Rucker – Tank 1 (Facility 25647) Inspection and Evaluation Report – (Final)

2. Molinelli Stagefield – Fort Rucker – Tank 1 (Facility 25647) Attachment C

Respectfully submitted, Pond

Anthony E, Chinn, EIT

Program Manager | Mechanical Integrity chinna@pondco.com

678-591-5242

CC: Eric Bausch – Eric.L.Bausch@usace.army.mil

Michael Ingram – michael.r.ingram8.civ@mail.mil

Edward Kimbley – edward.i.kimbley.civ@mail.mil mailto:chinna@pondco.com mailto:Eric.L.Bausch@usace.army.mil mailto:michael.r.ingram8.civ@mail.mil mailto:edward.i.kimbley.civ@mail.mil

API 653 In-Service Inspection Report Fort Rucker, Alabama

US Army Corps of Engineers Omaha District

API 653 In-Service Inspection Report

Molinelli Stagefield Army Heliport - Fort Rucker Facility 25647

Tank 1

US Army Corps of Engineers Center of Expertise for Petroleum, Oils and Lubricants 2/28/2020

Table of Contents

ACRONYMS AND ABBREVIATIONS

GENERAL SUMMARY

INSPECTION DATE

STATE REGULATIONS

PREVIOUS INSPECTION DATES

RECOMMENDED FUTURE INSPECTION DATES

GENERAL TANK INFORMATION

A. GENERAL PROJECT INFORMATION

1. API 653 IN-SERVICE (EXTERNAL) INSPECTION

2. SITE INFORMATION

B. TANK INSPECTION COMMENTS

1. TANK CONSTRUCTION

2. TANK FOUNDATION

3. CATHODIC PROTECTION

4. TANK SHELL

5. FIXED DOME ROOF

6. TANK APPURTENANCES

7. TANK AND PIPING COATING

8. TANK PIPING SYSTEM

9. FIRE PROTECTION SYSTEM

10. SECONDARY CONTAINMENT

C. FINDINGS AND RECOMMENDATIONS

1. MANDATORY REPAIRS PER API 650/653, UFC 3-460-01/3-460-03, OR AW 78-24-27 STANDARDS

2. REPAIRS TO FULLY COMPLY WITH API 650/653, UFC 3-460-01/3-460-03, AND NFPA 407

3. RECOMMENDED REPAIRS AS PART OF REGULAR MAINTENANCE

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

TANK CONFIGURATION DIAGRAM

TANK UTT MEASUREMENTS

APPENDIX B: API 653 CHECKLISTS FOR TANK INSPECTIONS

APPENDIX C: PHOTOGRAPHS

ACRONYMS AND ABBREVIATIONS

API American Petroleum Institute

AST Aboveground Storage Tank

ATG Automatic Tank Gauge

BBL Barrel

CP Cathodic Protection

DFT Dry Film Thickness

DoD Department of Defense

FML Flexible Membrane Liner

IAW In Accordance With

IFR Internal Floating Roof

HLA High Level Alarm

HLCV High Level Control Valve

HHLA High-High Level Alarm

ICCP Impressed Current Cathodic Protection

LLA Low Level Alarm

LLLA Low-Low Level Alarm

MT Magnetic Particle

NACE NACE International

NDT Non-Destructive Testing

NFPA National Fire Protection Association

OSHA Occupational Health and Safety Administration

PRT Product Recovery Tank

PT Dye Penetrant

TLG Tape Level Gauge

TRV Thermal Relief Valve

UFC Unified Facilities Criteria

USACE United States Army Corps of Engineers

UTT Ultrasonic Thickness Testing

VT Visual Testing

GENERAL SUMMARY

Pond was retained by the United States Army Corps of Engineers (USACE) to provide an in-service (external) tank inspection for Tank 1 (Facility 25647) at Molinelli Stagefield Army Heliport in Fort Rucker, Alabama.

The in-service inspection was performed 20 December 2019. Results of this inspection identified recommended repairs/upgrades to fully comply with applicable sections of American Petroleum Institute (API) 650/653, Unified

Facilities Criteria (UFC) 3-460-01/3-460-03, Department of Defense (DoD) AW 78-24-27, National Fire Protection

Association (NFPA) 407, and industry standards.

Tank 1 located at Molinelli Stagefield Army Heliport is a welded, carbon-steel, vertical, Jet-A aboveground storage tank (AST). Tank 1 was constructed in 1995 to API 650 standards by an unknown manufacturer. In 2012, Tank 1 was repaired/altered by CAPE to API 653 4th Edition. The tank is 27’-0” in diameter and 28’-3 ½” high. According to strapping charts provided by AmSpec in February 2012, Tank 1 has a capacity of approximately 2,558 barrels (BBL)

(107,424 gallons).

Testing and inspection activities were performed in accordance with (IAW) applicable sections of API 653, 5th

Edition. 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 - General Project Information. Recommended repairs and upgrades are further classified and listed in

Section C – Findings and Recommendations.

INSPECTION DATE

API In-Service (External) Inspection Date: 20 December 2019 Equipment Used:

Manufacturer: GE Krautkramer Ultrasonic Thickness Gauge Model Number: DMS GO+ Calibration Method: One-Point Calibration

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

Manufacturer: Technidea Corporation Model Number: ZipLevel Pro 2000 Calibration Method: Manufacturer Calibrated

Inspector(s):

Anthony E. Chinn Darrell A. Walters

STATE REGULATIONS

State Regulation for API In-Service Tank Inspections: N/A State Regulation for API Out-of-Service Tank Inspections: N/A

PREVIOUS INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: February 19, 2015 API In-Service (External) Inspection Date: Unknown

RECOMMENDED FUTURE INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: February 2025* API In-Service (External) Inspection Date: December 2024

*Internal inspection date is based on the previous internal preliminary inspection report dated February 2015.

Anthony E Chinn, EIT Darrell A. Walters

Program Manager | Mechanical Integrity Mechanical Integrity Engineer

API 653 Inspector # 50662 API 653 Inspector # 93640

ASNT NDT Level II ASNT NDT Level I/II

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner United States Army

Location Molinelli Stagefield Army Heliport - Fort Rucker

Facility Number 25647

Tank Number 1

State / Country Alabama / USA

City Fort Rucker

Inspection Date 20 December 2019

Tank Manufacturer Original: Unknown Alteration/Repair: CAPE

Design Standard Original: API 650 9th Edition1 Alteration/Repair: API 653 4th Edition

Date of Construction Original: 19951 Alteration/Repair: CAPE

Tank Contents Jet-A

Tank Serial Number N/A

Tank Diameter 27’-0”

Shell Height 28’-3 ½”

Product Height 24’-11 ½”

Tank Capacity 2,558 BBL (107,424 Gallons)2

Foundation Concrete Ringwall

Construction

Bottom: Lap Welded1

Shell: Butt Welded

Floating Roof: Aluminum Honeycomb Pan

Fixed Roof: Lap Welded

Material

Bottom: Carbon Steel (Unknown Grade)1

Shell: Carbon Steel (Unknown Grade)

Floating Roof: Aluminum

Fixed Roof: Carbon Steel (Unknown Grade)

Cathodic Protection (CP) Impressed Current Cathodic Protection (ICCP)

Interior Coating System Epoxy (Assumed)1

Exterior Coating System Epoxy, Epoxy, Polyurethane (Assumed)

Level Gauging Enraf automatic tank gauge (ATG) / Varec tape level gauge (TLG)

Overfill Protection High-level control valve (HLCV) float pilot

Piping Receipt 8-inch Carbon Steel

Main Suction 8-inch Carbon Steel

Low Suction 4-inch Carbon Steel

Water Draw-Off 2-inch Carbon Steel

Level Alarms Low, high, and high-high

Type of Internal Floating Roof Aluminum Honeycomb

Notes:

Previous out-of-service (OOS) inspection preliminary report dated February 2015 was available for review and comparison. Strapping charts were provided for tank capacity.

1Based on previous OOS preliminary inspection report dated February 2015.

2Based on AmSpec strapping charts.

A. GENERAL PROJECT INFORMATION

1. API 653 IN-SERVICE (EXTERNAL) INSPECTION

The in-service inspection was performed 20 December 2019. Results of this inspection identified recommended repairs/upgrades to fully comply with applicable sections of API 650/653, UFC 3-460-

01/3-460-03, DoD AW 78-24-27, NFPA 407, and industry standards.

2. SITE INFORMATION

Fort Rucker, the Home of Army Aviation, is an excellent place to live and work. Fort Rucker covers about 63,000 acres of southeast Alabama countryside in an area known as the Wiregrass, named for a wild grass peculiar to the region. Much of the main post is in Dale County, with the remaining government-owned and leased acreage in Coffee, Geneva, and Houston Counties. Most of the countryside is rolling and wooded.

Fort Rucker is about 80 miles southeast of Montgomery, the state capital. It is just 20 miles northwest of the city of Dothan. Fort Rucker is surrounded by the communities of Daleville, Enterprise, and Ozark, which have strong ties to the post.

The U.S. Army Aviation Center of Excellence trains, educates and develops Army Aviation professionals and integrates indispensable aviation capabilities across warfighting functions in support of commanders and soldiers on the ground.

B. TANK INSPECTION COMMENTS

1. TANK CONSTRUCTION

Tank 1 is a welded, steel, vertical AST. The tank was constructed in 1995 to API 650 9th Edition and repaired/altered in 2012 to API 653 4th Edition by CAPE. The tank is 27’-0” in diameter and 28’-3 ½” in height. According AmSpec strapping charts from February 2012, Tank 1 has a capacity of 2,558 BBL

(107,424 gallons). Current strapping charts provide fuel level in increments of 1/16-inch and in units of gallons.

2. TANK FOUNDATION

Tank 1 rests on a concrete ringwall foundation with four (4) perimeter leak detection ports. A settlement evaluation was performed during this inspection. No signs of out-of-plane settlement were noted.

See Appendix A for settlement results. The tank is provided eight (8) shell attached seismic anchors around the perimeter of the tank. One (1) seismic anchor bolt exhibits signs of deformation and should be monitored during future tank inspections.

3. CATHODIC PROTECTION

The tank is equipped with an ICCP system for protecting the tank bottom from corrosion. According to the previous cathodic protection (CP) report, dated September 2019. Tank 1 is receiving adequate CP as all potential measurements were greater than the -850 millivolts required by NACE International (NACE) standards.

4. TANK SHELL

The tank shell is equipped with four (4) butt-welded carbon 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 course plates using the spiral staircase for access. UTT measurements indicated no significant signs of metal loss on shell plates.

Refer to Drawing A-1, “Shell Layout” in Appendix A for shell layout.

Tank 1 is equipped with twenty (20) nozzle penetrations: Three (3) 36-inch manways, one (1) 8-inch receipt, one (1) ¾-inch water draw-off, one (1) 4-inch low suction, one (1) 8-inch main suction, five (5)

1-inch threaded plugs, two (2) 1-inch penetrations for the low level alarm (LLA), two (2) 1-inch penetrations for the high level alarms (HLA), two (2) 1-inch penetrations for the high-high level alarm

(HHLA), and two (2) 1-inch penetrations for the high level control valve (HLCV) float pilot. Tell-tale holes at shell nozzle reinforcement pads are open to the atmosphere and not provided a heavy lithium or white grease. The grease provided should be dissolvable when in contact with jet fuel to allow for adequate leak detection at interstitial nozzle welds. Hinges installed at three (3) shell manway covers are not provided davit arm attachments with grease fittings. Davit arm attachments allows for efficient operation of manway covers while opening and closing.

Conduit supports provided for the HLCV float pilot, level alarms, and ATG are not fully seal welded to the tank shell, allowing a crevice for water ingress at the support-to-shell interface. Interfaces exhibit signs of crevice corrosion with corrosion staining. Spacing between vertical shell plate butt-welds and two (2) conduit supports attached adjacent to manway 1 along with two (2) LLA penetrations do not meet the 6” minimum spacing requirement per API. Adequate weld spacing in the heat affected zone is a critical factor in limiting stress risers in the tank shell. A bird’s nest was observed inside one (1) shell overflow vent hood adjacent to the spiral staircase upper platform. The current position and orientation of vent screens allows for animal infestation underneath the vent hoods. To prevent further infestation, provide

1/2-inch stainless steel wire bird screens at four (4) vent openings that are oriented perpendicular to the tank shell.

5. FIXED DOME ROOF

Tank 1 is equipped with a fixed dome roof with welded steel plates. The fixed dome roof was examined using VT methods. The fixed dome roof is provided a non-slip coating with a rough surface profile, that prevented the acquisition of UTT measurements. Two (2) conduit supports attached at the roof are no longer in use and exhibit signs with of crevice corrosion at the support-to-roof interface.

The fixed dome roof is provided with fourteen (14) nozzle penetrations: One (1) 10-inch Enraf automatic tank gauge (ATG), one (1) 36-inch manway with 8-inch manual gauging hatch, two (2) 3-inch anti-rotation cables, one (1) 72-inch x 24-inch internal floating roof (IFR) installation hatch, one (1) 6-inch

Vito temperature/water combination probe, one (1) 10-inch sampling hatch, one (1) 8-inch blind flange, two (2) 3-inch grounding cable connection, two (2) 1 ½-inch tape level gauge (TLG) guide wires, one (1)

2-inch Varec TLG, and one (1) 24-inch manway with 8-inch center vent.

Refer to Drawing A-2, “Fixed Roof Layout” in Appendix A for fixed roof layout.

6. TANK APPURTENANCES

a. INTERNAL FLOATING ROOF

Tank 1 is equipped with an aluminum honeycomb IFR with double wiper peripheral seals.

Accessible portions of the IFR were inspected using VT methods. No signs of damage or compromise were noted during this inspection.

b. GAUGING

The tank is provided with an 8-inch gauging hatch for manual gauging, a 10-inch Enraf ATG system for automatic tank gauging, and 2-inch Varec TLG for monitoring product level from the ground. Both the manual gauging hatch and ATG are provided with fully slotted stilling wells. Hardware provided for the ATG and Vito temperature/water combination probe exhibits signs of corrosion.

c. LEVEL ALARMS

The tank is provided with independent, shell-mounted alarms in the low, high, and high-high positions. Tank 1 is not provided an independent, shell-mounted level alarm in the low-low position. Existing level alarms were functioning properly at the time of this inspection.

d. STAIRS AND PLATFORMS

The tank is provided with a spiral staircase with one (1) work platform for access to the IFR manway, and one (1) upper platform for fixed roof access. The HHLA/HLA/HLCV piping and the IFR access manway cover extend into the pathway of the spiral staircase. Spacing between these shell appurtenances and the spiral staircase handrail is approximately 20-inches. The landing distance from the ground to the first step is 22-inches. The Occupational Health and

Safety Administration (OSHA) mandates that staircases have a minimum clearance of 26-inches between appurtenances and handrails and a maximum landing distance of 9 ½-inches.

Wasp nests were observed on the underside of the spiral staircase work platform. This situation may create hazards for facility personnel.

e. GROUNDING AND BONDING

The tank shell is equipped with four (4) grounding lugs and cables that are in good overall condition with no signs of fraying or disbondment.

7. TANK AND PIPING COATING

The tank is assumed to be provided with an epoxy/polyurethane coating system. External tank shell and fixed roof coatings exhibit chalking, indicating the polyurethane topcoat is reaching the end of its life cycle. It is recommended to conduct a coating condition survey to determine if the entire coating system should be replaced, or if only a topcoat application is required. External coatings at one (1) pipe support and one (1) thermal relief valve (TRV) assembly for each of the main and low suction, along with two (2) pipe supports for the product recovery tank (PRT) drain line exhibit cracking and base metal exposure with surface corrosion.

The PRT coating exhibits flaking, peeling and disbondment; however, the PRT is not of carbon steel construction, therefore, an external coating system is not required. Various areas of bio-growth were identified on the tank shell and fixed roof plates, containment piping, spiral staircase, and shell and fixed roof nozzles and appurtenances. The spiral staircase and fixed roof perimeter handrail coatings exhibit cracking, flaking, and disbondment with base metal exposure. Fixed roof nozzle coatings at the IFR installation hatch, center vent, Vito probe flange, and blind flange exhibit cracking, chalking, and base metal exposure with surface corrosion. The tank is not provided NFPA emergency responder labeling.

Emergency responder labeling will aid emergency personnel to quickly identify hazard ratings for health, flammability, and instability.

8. TANK PIPING SYSTEM

Two (2) pipe supports provided for the PRT drain line are not properly anchored to the containment dike floor, allowing for excessive pipe movement during normal operations. The PRT drain line connecting flange is missing one fastener. Improper tightening of hardware may create a leak path at pipe flange connections. The PRT recirculation line is not properly supported at the containment dike wall. The pipe currently rests on the containment subdivision wall, which may result in contact point corrosion at the concrete-to-pipe interface.

The receipt and main suction TRV crossover piping are provided with sight flow indicators. Sight flow indicators are no longer used in this application as they are potential leak paths. The main suction piping is provided two (2) roller supports. Roller supports are no longer used in this application as they create excessive stress at the contact point. No contact point corrosion was observed during this inspection.

9. FIRE PROTECTION SYSTEM

For internal fire protection, Tank 1 is provided with an aluminum honeycomb IFR with double wiper peripheral seals.

10. SECONDARY CONTAINMENT

Tank 1 and Tank 2 are situated in a shared concrete containment dike with vertical walls. Based on dimensions, the containment dike can hold up to 133% of the nominal capacity of Tank 1 in the event of a spill, which results in a calculated freeboard height of approximately 1’-1 ¼” above the entire containment area. A flexible membrane liner (FML) is installed beneath the concrete containment floor.

Vegetation growth was observed within the secondary containment at locations of damaged sealant and at the drain opening. The secondary containment is equipped with one (1) drain. The drain is provided a valve normally in the closed position. The drain is gravity fed to an oil-water separator when the valve is open to drain the secondary containment. The steel cover provided at the drain opening is 6-inches below grade. This configuration may create trip hazards for facility personnel, lead to excessive debris build-up, and vegetation growth. According to facility personnel, the secondary containment drainage system is fully functional.

The dike access stairs are not in compliance with OSHA requirements, as each step has a tread depth of

4-inches, riser height of 11-inches, and the angle between the stair and containment floor is greater than

60°. OSHA requires a minimum tread depth of 9 ½-inches, maximum riser height of 9 ½-inches, and an angle of elevation between 30 to 50 degrees from the horizontal. This configuration is a potential fall hazard due to the steep elevation and improperly sized treads.

The link seal provided at the containment wall penetration for the receipt piping exhibits signs of damage with tearing and general deterioration. The containment wall penetration for the PRT drain line is not provided isolation between the piping and concrete. Dike crossover stairs are not provided for egress/ingress between the containment areas for Tank 1 and Tank 2. The containment dike concrete expansion joints exhibit signs of sealant damage with voids and disbondment.

C. FINDINGS AND RECOMMENDATIONS

Based on the in-service API 653 inspection of Tank 1 located at Molinelli Stagefield Army Heliport in Fort

Rucker, Alabama, repair/upgrade recommendations have been identified. The following recommendations outline observations from this inspection. All repair recommendations are based on applicable sections of

API 650/653, UFC 3-460-01/3-460-03, DoD Standard AW 78-24-27, NFPA 407, and industry standards

1. MANDATORY REPAIRS PER API 650/653, UFC 3-460-01/3-460-03, OR AW 78-24-27 STANDARDS

Mandatory repairs represent items that require immediate attention to prevent imminent risk to system operators, equipment integrity, or the adjacent environment. The tank should be taken out of service until these repairs are completed.

No mandatory repairs are required to remove Tank 1 from service.

2. REPAIRS TO FULLY COMPLY WITH API 650/653, UFC 3-460-01/3-460-03, AND NFPA 407

These repairs are non-mandatory but are based on minimum requirements per API 650/653, UFC 3-460-

01/3-460-03, and NFPA 407 standards for maintaining tank structural and hydraulic integrity

a. Tank Shell Coating

OBSERVATION: External coating on the tank shell exhibits chalking, indicating the polyurethane topcoat is nearing the end of its life cycle.

REFERENCE: UFC 3-460-03, Section 8-3.1

RECOMMENDATION: Provide a full recoat of the external tank shell, approximately 2,500 ft2. Prior to recoat, conduct a coating condition survey to determine if the entire coating system should be replaced, or if only a topcoat application is required.

b. Fixed Roof Coating

OBSERVATION: External coating on the fixed roof exhibits chalking, indicating the polyurethane topcoat is nearing the end of its life cycle.

REFERENCE: UFC 3-460-03, Section 8-3.1

RECOMMENDATION: Provide a full recoat of the tank roof, approximately 690 ft2. Prior to recoat, conduct a coating condition survey to determine if the entire coating system should be replaced, or if only a topcoat application is required.

c. Piping External Coating

OBSERVATION: External coating at one (1) pipe support and one (1) TRV assembly for each of the main and low suction, along with two (2) pipe supports for the drain line exhibits cracking and base metal exposure with surface corrosion.

REFERENCE: UFC 3-460-03, Section 6-10.1.1

RECOMMENDATION: Provide approximately 25 ft2 of coating repair at the main suction TRV assembly and one (1) pipe support, low suction TRV assembly and one (1) pipe support, and two (2) pipe supports at the PRT.

d. PRT Pipe Support Anchor

OBSERVATION: Pipe supports provided at the PRT drain line are not properly anchored to the dike floor.

REFERENCE: UFC 3-460-03, Section 6-1.5.D

RECOMMENDATION: Provide anchorage at two (2) PRT pipe supports to eliminate excessive pipe movement.

e. Receipt Piping

OBSERVATION: The link seal provided at the receipt piping containment wall penetration exhibits signs of damage with tearing and general deterioration.

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

RECOMMENDATION: Replace one (1) link seal provided at the receipt piping wall penetration.

f. Main Suction Piping

OBSERVATION: The main suction line is provided two (2) roller pipe supports. Roller supports are no longer used in this application.

REFERENCE: UFC 3-460-01, Section 9-3.2

RECOMMENDATION: Remove roller supports and provide standard sliding or saddle supports at main suction piping.

g. TRV Crossover Piping

OBSERVATION: The TRV assemblies provided at the receipt and main suction lines are equipped with sight flow indicators.

REFERENCE: UFC 3-460-01, Section 9-3.5.1

RECOMMENDATION: Remove sight flow indicators and install testing spool piece in accordance with

AW 78-24-27 DoD Design standard. Sight flow indicators are no longer used in this application as they are potential leak paths. Provide isolation flange kits at carbon steel and stainless-steel connection points to prevent galvanic corrosion due to contact between dissimilar metals.

h. Low Level Alarms

OBSERVATION: Two (2) conduit supports adjacent to Manway 1 and two (2) LLA penetrations are welded approximately ¾-inch from the shell plate vertical butt weld creating a potential stress riser in the heat affected zone. No signs of stress cracking were observed during the inspection.

REFERENCE: API 650, Section 5.7.3.2

RECOMMENDATION: Perform magnetic particle testing (MT) or dye penetrant testing (PT) at non-compliant welds. API requires a minimum 6-inch spacing between shell vertical welds.

i. Shell Attachments

OBSERVATION: Conduit supports provided for the HLCV, level alarms, and ATG systems are not fully seal welded to the tank, allowing water ingress at the conduit support-to-shell interface. Signs of crevice corrosion were observed.

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

RECOMMENDATION: Provide approximately 30 linear feet of seal weld at twenty (20) conduit supports.

j. Shell Attachments

OBSERVATION: Shell manways are not provided davit arm attachments with grease fittings. Davit arms allows for efficient operation of manway covers during opening and closing.

REFERENCE: AW 78-24-37, Sheet D.10 – Detail 3

RECOMMENDATION: Provide three (3) davit arm assemblies, with one (1) installed at each of the three (3) shell manway covers.

k. Containment Dike Entry Stairs

OBSERVATION: Stairs provided for entry/exit into the containment dike does not meet OSHA requirements. For each step the tread depth is 4-inches, riser height is 11-inches, and the angle between the stair and containment floor is greater than 60°. Current configuration is a fall hazard due to steep elevation and improper sized treads.

REFERENCE: OSHA 1910.25

RECOMMENDATION: Rework dike entry/exit stairs to have a minimum tread depth of 9 ½-inches, a maximum riser height of 9 ½-inches, and an elevation angle between 30° to 50° with the containment floor.

l. Containment Dike Sealant

OBSERVATION: Tank containment dike exhibits sealant damage with voids and disbondment at concrete expansion joints.

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

RECOMMENDATION: Provide approximately 15 linear feet of flexible, UV resistant, fuel resistant sealant at concrete expansion joints.

m. Containment Dike Wall

OBSERVATION: The containment area housing Tank 1 is not provided crossover stairs for egress/ingress to the adjacent Tank 2 containment area.

REFERENCE: UFC 3-460-01, Section 8-14.8

RECOMMENDATION: Provide one (1) set of crossover stairs installed at the wall separating the containment areas for Tank 1 and Tank 2.

n. PRT Coating

OBSERVATION: External coating provided for the PRT exhibits cracking, flaking, and base metal exposure. The PRT is not of carbon steel construction, therefore, an external coating system is not required for this appurtenance.

REFERENCE: BMP

RECOMMENDATION: Remove coating from external surface of the PRT.

o. PRT Piping

OBSERVATION: Pipe penetration for the PRT drain line is not provided isolation.

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

RECOMMENDATION: Provide isolation at the PRT drain line containment penetration to prevent contact point corrosion at the interface between concrete and piping

p. PRT Piping

OBSERVATION: The PRT drain line connecting flange is missing one (1) fastener.

REFERENCE: BMP

RECOMMENDATION: Install one (1) stainless steel fastener at the PRT drain line connecting flange.

Missing fasteners may create a leak path at the flange connection interface.

q. PRT Recirculation Piping

OBSERVATION: Recirculation piping provided for the PRT rests directly on the concrete dike wall.

REFERENCE: UFC 3-460-01, Section 9-3.2.A

RECOMMENDATION: Rework two (2) associated pipe supports to elevate recirculation piping. No signs of corrosion were observed at the interface between the piping and concrete.

r. Tank Alarm System

OBSERVATION: Tank 1 is not provided an independent shell mounted alarm in the low-low level position.

REFERENCE: UFC 3-460-01, Section 8-9.9

RECOMMENDATION: Provide an independent shell mounted low-low level alarm (LLLA) on the tank shell. Tank 1 is currently provided a LLA.

s. Spiral Staircase Clearance

OBSERVATION: The HHLA/HLA/HLCV float pilot piping and IFR access manway cover extends into the pathway of the spiral staircase. Current spacing between the spiral staircase handrail and level alarm piping is approximately 20-inches.

REFERENCE: OSHA 1910.25(d)(2)

RECOMMENDATION: Extend stair treads adjacent to the HHLA/HLA/HLCV float pilot piping and the

IFR access manway cover to provide 26-inches of clearance as required by OSHA for ingress/egress to the fixed roof.

t. Spiral Staircase and Fixed Roof Handrail

OBSERVATION: External coating at the fixed roof perimeter handrail and spiral staircase exhibit cracking, flaking, and disbondment with base metal exposure.

REFERENCE: UFC 3-460-03, Section 8-3.1

RECOMMENDATION: Provide approximately 20 ft2 of coating repairs at spiral staircase.

u. Spiral Staircase

OBSERVATION: The landing distance for the spiral staircase does not meet OSHA requirements.

Current spacing from the ground to the first step is 22-inches, which is greater than the 9 ½-inches OSHA Requirement.

REFERENCE: AW 78-24-27 Sheet D.11, Detail 4 and OSHA 1910.25(d)(2)

RECOMMENDATION: Provide a landing for the spiral staircase to maintain a max distance of 9 ½-inches.

v. Fixed Roof Coating

OBSERVATION: External coating at the IFR installation hatch, center vent, Vito probe flange, and blind flange exhibit cracking, chalking, and base metal exposure with surface corrosion.

REFERENCE: UFC 3-460-03, Section 8-3.1

RECOMMENDATION: Provide approximately 15 ft2 of coating repair at fixed roof nozzles.

w. Tank Roof Appurtenance

OBSERVATION: Hardware provided at the Enraf ATG and Vito Probe connecting flanges exhibit surface corrosion.

REFERENCE: UFC 3-460-03, Section 6-6.2.5.1

RECOMMENDATION: Replace twenty-eight (28) corroded fasteners at flanges for the Enraf ATG and

Vito probe, and provide insulating flange kits to isolate hardware from flanges to prevent galvanic corrosion.

x. Shell Attachments

OBSERVATION: Tank 1 is not provided labeling in accordance with NFPA 704.

REFERENCE: UFC 3-460-01, Section 2-17

RECOMMENDATION: Provide NFPA responder labeling to aid in identifying hazard ratings for stored product.

3. RECOMMENDED REPAIRS AS PART OF REGULAR MAINTENANCE

Regular maintenance repairs that relate to repairs/upgrades of an asset to bring it up to the current applicable standard from the standard at time of construction. These repairs represent items that should be addressed in a timely manner to prevent future potential risks to system operators, equipment integrity, or the adjacent environment.

y. Overall Tank Coating

OBSERVATION: Various areas of bio-growth were identified on the shell and fixed roof plates, piping, spiral staircase, and shell and fixed nozzles and appurtenances.

REFERENCE: BMP

RECOMMENDATION: Pressure wash tank to remove bio-growth. Bio-growth can potentially accelerate coating deterioration and corrosion. After bio-growth removal perform a coating condition survey to determine if the entire coating system should be replaced or if only a topcoat application is required.

z. Shell Reinforcement Pad

OBSERVATION: Tell-tale holes at shell nozzle reinforcement pads are open to the atmosphere.

REFERENCE: BMP

RECOMMENDATION: Provide a heavy lithium or white grease at tell-tale holes for seven (7) nozzle reinforcement pads to prevent water ingress into the interstitial space. Grease should dissolve in the presence of jet fuel to allow for adequate leak detection at nozzle welds.

aa. Containment Drain

OBSERVATION: Steel cover provided for the containment drain is currently 6-inches below grade.

This configuration may create trip hazards for facility operators and lead to excessive debris build-up.

REFERENCE: BMP

RECOMMENDATION: Rework containment drain cover to be flush with the surrounding containment grade.

bb. Containment Drain

OBSERVATION: Vegetation growth was observed at the dike drain and at various control joints.

REFERENCE: UFC 3-460-03, Section 8-10.2.1. A

RECOMMENDATION: Remove vegetation from dike drain to prevent blockage and debris build-up and at various control joints and provide sealant repair as necessary.

cc. Spiral Staircase

OBSERVATION: Wasp nests were observed at stair platform adjacent to the IFR access manway.

RECOMMENDATION: Remove wasp nests to prevent injury to facility personnel.

dd. Tank Overflow Vent

OBSERVATION: A bird’s nest was observed inside one (1) overflow vent hood adjacent to the spiral staircase. Bird screens provided at four (4) overflow vent openings are oriented parallel to the tank shell allowing an opening for animal infestation underneath the vent hood.

REFERENCE: AW 78-24-37, Sheet D.07 – Detail 6

RECOMMENDATION: Remove birds’ nest from inside one (1) overflow vent hood. Additionally, rework the existing vent screens or install new ½-inch stainless steel wire bird screens at four (4) overflow vent hood openings. Wire screens should be oriented perpendicular to the tank shell and vent hood to limit further animal infestation.

ee. Fixed Roof Conduit Supports

OBSERVATION: Tank roof is provided two (2) conduit supports that are no longer in use. Crevice corrosion staining was present at the roof-to-support interface.

RECOMMENDATION: Remove two (2) unused conduit supports on the fixed roof.

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

TANK CONFIGURATION DIAGRAM

API-653 APPENDIX B SHELL SETTLEMENT EVALUATION

(para. B.2.2.4)

Report No Client Inspector Vessel Date

Fort Rucker - Tank 1 USACE Darrell Walters (POND) Tank 1 (25647) 01/28/2020

Base Elev Max Elev Elev

FT 1.983 2.017 0.034 R^2 = 0.968

IN 23.796 24.204 0.408

API-653 APPENDIX B SHELL SETTLEMENT EVALUATION

Report No.: Fort Rucker - Tank 1

D H Roof Type L 1st Crs Plt Spec Y E

27 28.3 F 10.60 Unknown 30000 29000000

Where:

D = Tank Diameter, in ft H = Tank Height, in ft Roof Type: F = fixed, O = Open L = Arc length between measurement points, in ft (32' max) (greatest dist. allowed based on even # of points) Y = Yield strength of shell 1st course , in pounds per Sq.Inch (psi) E - Young's modulus, in pounds per Sq.Inch (psi)

= Angle theta at elevation point, in degrees PE = Predicted elevation, in ft Ui = Measured out-of-plane settlement in relation to a cosine curve, in ft Si = Deflection, in ft, (out-of-plane distortion) Smax = Maximum allowed deflection, in ft, (out-of-plane distortion)

Smax =((L^2*Y*11)/2*(E*H)) = 0.023

Point Elevation PE Ui Si Results

1 2.000 0 2.000 0.000 0.000 SAT

2 2.008 45 2.012 -0.004 -0.004 SAT

3 2.017 90 2.017 0.000 0.004 SAT

4 2.008 135 2.012 -0.004 0.000 SAT

5 1.992 180 2.000 -0.008 -0.003 SAT

6 1.983 225 1.988 -0.005 -0.001 SAT

7 1.983 270 1.983 0.000 0.000 SAT

8 1.992 315 1.988 0.004 0.004 SAT

SHELL MINIMUM THICKNESS CALCULATIONS

Tank Shell Minimum Thickness and Remaining Life Calculations Date 01/28/2020

File No. Report No. Client Tank No. Temp. (degF) Initials

3573 Fort Rucker - Tank 1 USACE Tank 1 (25647) Darrell W tmin = 2.6(H-1)DG

SE

Where:

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

tmin = The calculated minimum acceptable shell thickness, in inch (cannot be less than

0.10 inch for any course). The minimum acceptable shell thickness allowed by API-653 and STI-SP001 for tank size, in inch .

D = Nominal diameter of tank, in ft.

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 psi. 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 = 21000 psi. For STI Tank Inspections S = 26000 psi (E = 1)

Y = Specified minimum yield strength of the plate, in psi; use 30000 psi if not known (N/A for riveted tanks).

T = The smaller of the specified minimum tensile strength of the plate or 80000 psi; use 55000 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 ; 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. For STI Tank Inspections E = 1 where S = 26000 psi.

D (ft) 27 G 0.84 E 1.00 Fill Height (ft) 25.0

Material Crs H (ft) H (ft) S (psi) tmin (inch) Course 1 Unknown 8 25.0 23600 0.100 Course 2 Unknown 8 17.0 23600 0.100 Course 3 Unknown 8 9.0 26000 0.100 Course 4 Unknown 4.29 1.0 26000 0.100

SHELL REMAINING LIFE CALCULATIONS

Assumed nominal thicknesses along with thickness measurements acquired during this inspection were used to determine the shell remaining life.

Tank Shell Minimum Thickness and Remaining Life Calculations Date 01/28/2020

File No. Report No. Client Tank No. Temp. (degF) Initials

3573 Fort Rucker - Tank 1 USACE Tank 1 (25647) Darrell W

Ca = tact-tmin = Remaining Corrosion Allowance (inch) Cr = tprev-tact / Y = Corrosion Rate (inch/Yr) RL = Ca / Cr = Remaining Life (year)

Y = 25 = Tank age (year)

Where:

Ca = Remaining corrosion allowance of the shell course under consideration, in inch.

Cr = Corrosion rate of the shell course under consideration, in inch per year.

FHc = Calculated fill Height = (SEtact/2.6DG+1) + (product height below course of interest), in ft.

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

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

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

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

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

tprev tact tmin Ca Cr RL FHc Course 1 0.250 0.248 0.100 0.148 0.0001 1850 100.25 Course 2 0.250 0.241 0.100 0.141 0.0004 392 105.45 Course 3 0.250 0.250 0.100 0.150 0.0000 >40 127.23 Course 4 0.250 0.247 0.100 0.147 0.0001 1225 133.91

TANK UTT MEASUREMENTS

TABLE 1 - SHELL UTT MEASUREMENTS

Fixed Dome Roof

Shell Course

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

.247 .245 .246 .247 .246 .249 .247 .246 .248

Avg. .247

Circumferential Weld C4

Shell Course

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

.249 .249 .249 .253 .253 .252 .247 .247 .248 .252 .254 .251 .247 .248 .246 .251 .253 .252

Avg. .248 .252

Circumferential Weld C3

Shell Course

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

.251 .251 .253 .242 .243 .242 .249 .252 .253 .116 .246 .242 .252 .252 .251 .247 .248 .246

Avg. .252 .230

Circumferential Weld C2

Shell Course

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

.255 .252 .253 .135 .248 .249 .253 .248 .253 .249 .250 .251 .251 .250 .249

.255 .254 .253 .249 .249 .248 .253 .254 .251 .247 .250 .251 .252 .250 .249

.251 .251 .249 .249 .246 .249 .250 .251 .251 .246 .250 .250 .247 .249 .249

Avg. .253 .236 .252 .249 .250

Circumferential Weld C1

Thickness Represented in inches.

Average Shell Course 1 .248 Average Shell Course 2 .241 Average Shell Course 3 .250 Average Shell Course 4 .247 Refer to Drawing A-2 in Appendix for plate numbers.

TABLE 2 - SHELL AND ROOF NOZZLE / REINFORCEMENT PAD UTT MEASUREMENTS

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

0⁰ 90⁰ 180⁰ 270⁰

MW1 36'' E 78" X 94" .252 .499 .498 .500 .501 3' - 4" 0' - 2 1/2" 0 Manway

N1 8'' B 18'' .249 .519 .495 .485 .517 2' - 1 1/2" 1' - 2 1/2" 16' - 2" Receipt

N2 3/4" - - - TH TH TH TH 0' - 5" - 31' - 3" Water Draw-off

N3 4'' B 14'' .255 .235 .229 .225 .229 2' -0" 1' - 4 3/4" 35' - 0" Low Suction

N4 8'' B 18'' .251 .299 .311 .306 .298 2' -0" 1' - 2 1/2" 38' - 9" Main Suction

MW2 36'' E 78" X 94" .248 .501 .502 .499 .498 3' - 4" 0' - 2 1/2" 44' - 6" Manway

N5 1 1/2" - - - TH TH TH TH 5' - 9" - 48' - 9" Threaded Plug

N6 1 1/2" - - - TH TH TH TH 2' - 3" - 49' - 2" Threaded Plug

N7 1 1/2" - - - TH TH TH TH 2' - 0" - 49' - 2" Threaded Plug

N8 1'' - - - TH TH TH TH 3' - 9" - 52' - 0" LLA

N9 1'' - - - TH TH TH TH 0' 6" - 52' - 0" LLA

MW3 1'' E 78" X 94" .251 .502 .502 .492 .499 9' 6" 6' - 3" 60' - 8" IFR Access Manway

N10 1'' - - - TH TH TH TH 24' - 2" - 72' - 9" Threaded Plug

N11 1'' - - - TH TH TH TH 25' -11" - 73' - 3" HLCV Float Pilot

N12 1'' - - - TH TH TH TH 25' - 5" - 73' - 3" HLCV Float Pilot

N13 1'' - - - TH TH TH TH 25' - 4" - 73' - 10" HLA

N14 1'' - - - TH TH TH TH 26' - 0" - 73' - 10" HLA

N15 1'' - - - TH TH TH TH 24' - 8" - 74' - 1" Threaded Plug

N16 1'' - - - TH TH TH TH 26' - 0" - 75' - 2" HHLA

N17 1'' - - - TH TH TH TH 25' 5" - 75' - 10" HHLA

N18 10" B 24'' .240 .382 .384 .333 .360 Fixed Roof Sampling Hatch

MW4 36" - - - .490 .494 .494 .491 Fixed Roof Manway w/ 8" Manual Gauge Hatch

N19 3" - - - TH TH TH TH Fixed Roof Anti-Rotation Cable

N20 3" TH TH TH TH Fixed Roof IFR Grounding Connection

N21 6" B 16'' .246 .272 .283 .270 .285 Fixed Roof Vito Temperature/Water Probe

N22 72" x 24" - - - - - - - Fixed Roof IFR Installation Hatch

N23 1 1/2" E - - TH TH TH TH Fixed Roof TLG Guide Wire

N24 2" - - - TH TH TH TH Fixed Roof Varec TLG

N25 1 1/2" - - - TH TH TH TH Fixed Roof TLG Guide Wire

N26 24" - - - .388 .379 .382 .378 Fixed Roof Manway w/ 8" Canter Vent

N27 10" B 24'' .253 .359 .369 .374 - Fixed Roof Enraf ATG

N28 3'' TH TH TH TH Fixed Roof IFR Grounding Connection

N29 8" - - - .503 .504 .502 .506 Fixed Roof Blind Flange

N30 3'' - - - TH TH TH TH Fixed Roof Anti-Rotation Cable Refer to drawing A-1 in Appendix A for nozzle numbers and locations. Repad Shapes:

Thicknesses are represented in inches.

TH = Threaded H1 = Centerline of pipe to the tank chime.

H2 = Lower weld toe of reinforcement pad or nozzle to the tank chime or shell plate weld.

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

TLG SUPPORT

(TYP. 5)

VAREC

TLG

CONDUIT SUPPORT

(TYP.18)

CP JUNCTION

BOX

NAMEPLATE

SPIRAL

STAIRCASE

OVERFLOW VENT

(TYP.4)

SEISMIC ANCHOR

(TYP.8)

TANK FOUNDATION

DAVIT ARM

SUPPORT

8'-0"

8'-0"

8'-0"

4'-3

MW1

MW2

MW3

N1

N2

N3

N4

N5

N6

N7

N8

N9

N11

N10

N13

N16

N15

N12

N14

N17

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

3-43-33-23-13-5

4-1 4-3

4-4

4-24-5

DEFORMED

ANCHOR BOLT

GROUNDING CABLE

CONNECTION (TYP.4)

NOTES:

1. REFER TO TABLE 1, "SHELL UTT MEASUREMENTS", IN

APPENDIX A FOR INDIVIDUAL SHELL PLATE UTT READINGS.

2. REFER TO TABLE 2, "SHELL AND ROOF NOZZLE / REPAD UTT

MEASUREMENTS" IN APPENDIX A FOR NOZZLE DATA.

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

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

D E

L I V

E R

Y

O

R D

R

SHEET

IDENTIFICATION

D A

T E

A P

P R

SHEET OF

U S

A

R M

Y

C

O R

P S

F

E

N G

I N

E E

R S

O M

A H

A

N

E

O M

A H

A

D

I S

T R

I C

T

F O

C

K E

R

A

L

M O

L I N

E L L I

S

T A

G E

F I E

D

M

Y

H

E L

I P

O R

T

T A

K

A

Y O

U T

N T

S

N A

W

F

D

W

F

F

A N

S I

B 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

A E

C

A E

C

D A

W

N A

TANK INFORMATION

TANK NO.: TANK 1

MANUFACTURER: UNKNOWN

REPAIRED/ALTERED: CAPE

YEAR BUILT: 1995

TANK DIAMETER: 27'-0"

TANK HEIGHT: 28'-3

NOMINAL CAPACITY: 2,558 BBL

PRODUCT: JET-A

PRODUCT SPECIFIC GRAVITY: 0.84

GPS COORDINATES: 31.47861°, -85.78056°

N A

S H

E L

L

L A

Y O

U T

A-1

NOZZLE

SCHEDULE

NOZZLE

SIZE

NOZZLE FUNCTION

MW1 36" MANWAY

N1 8" RECEIPT

N2

" WATER DRAW-OFF

N3 4" LOW SUCTION

N4 8" MAIN SUCTION

MW2 36" MANWAY

N5 1

" THREADED PLUG

N6 1

" THREADED PLUG

N7 1

" THREADED PLUG

N8 1" LLA

N9 1" LLA

MW3 1" IFR ACCESS MANWAY

N10 1" THREADED PLUG

N11 1" HLCV FLOAT PILOT

N12 1" HLCV FLOAT PILOT

N13 1" HLA

N14 1" HLA

N15 1" THREADED PLUG

N16 1" HHLA

N17 1" HHLA

N21

LAP

PATCH

N19

N18

MW4

N20

LAP

PATCH

N27

N23

N24

N25

N22

N26

LAP

PATCH

N28

N29

N30

PERIMETER VENT

(TYP. 4)

SPIRAL

STAIRCASE

CONDUIT

SUPPORT

(TYP.14)

NOTES:

1. REFER TO TABLE 2, "SHELL AND ROOF NOZZLE / REPAD

UTT MESUREMENTS", IN APPENDIX A FOR NOZZLE DATA.

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

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

D E

L I V

E R

Y

O

R D

SHEET

IDENTIFICATION

D A

T E

A P

P R

SHEET OF

U S

A

R M

Y

C

O R

E

N G

I N

E E

R S

O M

A H

A

N

E

O M

A H

A

D

I S

T R

I C

T

F O

C

K E

R

A

L

M O

L I N

E L L I

S

T A

G E

F I E

M

Y

H

E L

I P

O R

T

T A

A

Y O

U T

N T

S

N A

W

F

D

W

F

F

A N

S I

B 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

A E

C

A E

C

D A

W

N A

TANK INFORMATION

TANK NO.: TANK 1

MANUFACTURER: UNKNOWN

REPAIRED/ALTERED: CAPE

YEAR BUILT: 1995

TANK DIAMETER: 27'-0"

TANK HEIGHT: 28'-3

NOMINAL CAPACITY: 2,558 BBL

PRODUCT: JET-A

PRODUCT SPECIFIC GRAVITY: 0.84

GPS COORDINATES: 31.47861°, -85.78056°

N A

F I X

O

F

L A

Y O

U T

A-2

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

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

D E

L I V

E R

Y

O

R D

SHEET

IDENTIFICATION

D A

T E

A P

P R

SHEET OF

U S

A

R M

Y

C

O R

E

N G

I N

E E

R S

O M

A H

A

N

E

O M

A H

A

D

I S

T R

I C

T

F O

C

K E

R

A

L

M O

L I N

E L L I

S

T A

G E

F I E

M

Y

H

E L

I P

O R

T

T A

A

Y O

U T

N T

S

N A

W

F

D

W

F

F

A N

S I

B 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

A E

C

A E

C

D A

W

N A

TANK INFORMATION

TANK NO.: TANK 1

MANUFACTURER: UNKNOWN

REPAIRED/ALTERED: CAPE

YEAR BUILT: 1995

TANK DIAMETER: 27'-0"

TANK HEIGHT: 28'-3

NOMINAL CAPACITY: 2,558 BBL

PRODUCT: JET-A

PRODUCT SPECIFIC GRAVITY: 0.84

GPS COORDINATES: 31.47861°, -85.78056°

N A

NOZZLE

SCHEDULE

NOZZLE

SIZE

NOZZLE FUNCTION

N18 10" SAMPLING HATCH

MW1 36" MANWAY W/ 8" MANUAL GAUGE HATCH

N19 3" ANTI-ROTATION CABLE

N20 3" IFR GROUNDING CONNECTION

N21 6" VITO TEMPERATURE/WATER PROBE

N22 72" X 24" IFR INSTALLATION HATCH

N23 1

" TLG GUIDE WIRE

N24 2" VAREC TLG

N25 1

" TLG GUIDE WIRE

N26 24" MANWAY W/ 8" CENTER VENT

N27 10" ENRAF ATG

N28 3" IFR GROUNDING CONNECTION

N29 8" BLIND FLANGE

N30 3" ANTI-ROTATION CABLE

NEXT INSPECTION

The interval between tank inspections (both internal and external) should be determined by the tank service history.

Inspection intervals can be adjusted based on known corrosion rates. Corrosion rates can only be determined when a comparison is made between UTT measurements taken over an interval of time. In this case, corrosion rates were determined using assumed nominal thicknesses and UTT measurements taken during this inspection. Listed below are 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 joint), coating, and appurtenances.

a. Interval: Monthly

2. External Visual Inspection

Formal visual external inspection shall be performed by an API certified inspector 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. Based on the review of shell thickness measurements, the 5-year interval will govern the next external visual inspection. This inspection includes inspection requirements listed in a routine in-service inspection as well as a visual inspection of the tank grounding system.

b. Interval: Five (5) years; December 2024

3. External Visual Inspection with Ultrasonic Thickness Testing

An API certified inspector with the assistance of an NDT examiner shall perform this inspection. UTT measurements shall be taken to verify thickness of the tank shell and associated components. Obtained UTT measurements are used to determine corrosion rates and remaining life of the tank shell. UTT measurements of shell plates can be performed with the tank in service and scheduled at a maximum interval of fifteen (15) years or RCA/2N, whichever is less.

Based on shell thickness measurements and corrosion rates, the recommended interval for this inspection is fifteen

(15) years.

c. Interval: Fifteen (15) years; December 2034

4. Internal Inspection

An API certified inspector with the assistance of an NDT examiner shall perform this inspection. This inspection consists of verifying that the tank bottom is not severely corroded and/or leaking, identifying and evaluation tank bottom settlement, and inspection requirements listed in both external visual inspections. Based on the internal

(out-of-service) API 653 preliminary inspection report dated February 2015, the next internal inspection should be performed within ten (10) years.

d. Interval: Ten (10) years; April 2025 (UFC)

Ten (20) years; February 2035 (API)

OSHA ACCESS STRUCTURE REPORT

OSHA Stairway Data

OSHA Required

Handrail Actual (in) Min (in)

Max (in)

Pass/Fail

Height: 34 30 37 Pass

Width: 20* 26 N/A Fail *Note - Handrail width measured from shell nozzles that extend into stairway path.

APPENDIX B: API 653 CHECKLISTS FOR TANK INSPECTIONS

Tank In-Service Inspection Checklist

Item Completed

X

C.1.1 Foundation

Measure foundation levelness and bottom elevations (see Appendix 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 X 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.

N/A

C.1.1.4 Rock a Presence of crushed rock under the steel bottom usually results in severe underside corrosion.