Attachment J - Barksdale AFB - Tank 5932 -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.

January 9, 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: 007

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

1. Barksdale AFB – Tank 5932 Inspection and Evaluation Report – (Final)

2. Barksdale AFB – Tank 5932 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

William Koff – William.Koff@us.af.mil

API 653 In-Service Inspection Report Barksdale AFB, Louisiana

US Army Corps of Engineers Omaha District

API 653 In-Service Inspection Report

Barksdale AFB Facility 5898

Tank 5932

US Army Corps of Engineers Center of Expertise for Petroleum, Oils and Lubricants 01/09/2020

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. TANK APPURTENANCES

6. TANK AND PIPING COATING

7. TANK PIPING SYSTEM

8. FIRE PROTECTION SYSTEM

9. SECONDARY CONTAINMENT

C. FINDINGS AND RECOMMENDATIONS

1. MANDATORY REPAIRS PER API 653, UFC 3-460-01, OR DoD 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

OSHA ACCESS STRUCTURE REPORT

NEXT INSPECTION

APPENDIX B: API 653 CHECKLISTS FOR TANK INSPECTIONS

APPENDIX C: PHOTOGRAPHS

ACRONYMS AND ABBREVIATIONS

AFB Air Force Base

AFGSC Air Force Global Strike Command

API American Petroleum Institute

ATG Automatic Tank Gauge

BBL Barrel

DB&B Double Block and Bleed

DFT Dry Film Thickness

DoD Department of Defense

FML Flexible Membrane Liner

GPM Gallons per Minute

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

NDT Non-Destructive Testing

NFPA National Fire Protection Association

OSHA Occupational Health and Safety Administration

PRT Product Recovery Tank

PT Dye Penetrant

SOW Scope of Work

TRV Thermal Relief Valve

UFC Unified Facilities Criteria

USACE United States Army Corps of Engineers

UT Ultrasonic Testing

VT Visual Testing

GENERAL SUMMARY

Pond was retained by United States Army Corps of Engineers (USACE) to provide an in-service tank inspection for

Tank 5932 (Facility 5898) at Barksdale Air Force Base (AFB) in Bossier, Louisiana.

The in-service inspection was performed 19 November 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 5932, located at Barksdale AFB, is a welded, steel, vertical, aboveground Jet-A storage tank. The tank was constructed in 1957 to the design standard API 12C and repaired by CAPE to API 650 12th Edition in 2014. The tank is 67’-0” in diameter and 46’-4” high. According to strapping charts provided by AmSpec in March 2015, Tank 5932 has a nominal capacity of approximately 29,000 barrels (BBL) (1,218,000 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 identified in Section B are further classified and listed in Section C – Findings and Recommendations.

INSPECTION DATE

API In-Service (External) Inspection Date: 19 November 2019 Equipment Used:

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

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

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

Inspector(s):

Christopher A. Walker, EIT Chris N. Thompson

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: March 11, 2014 API In-Service (External) Inspection Date: November 28, 2006

RECOMMENDED FUTURE INSPECTION DATES

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

*Internal inspection date is based on the previous internal inspection report dated March 2014.

Christopher A. Walker, EIT Chris N. Thompson

Mechanical Integrity Engineer API 653 Inspector # 34955

API 570 Inspector # 85282 ASNT NDT Level III

STI SP001 Inspector # AST-2028

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner United States Air Force

Location Barksdale AFB

Facility Number 5898

Tank Number 5932

State / Country Louisiana, USA

City Bossier

Inspection Date 19 November 2019

Tank Manufacturer Unknown Repaired by CAPE in 2014

Design Standard Original: API 12C Repaired to API 650 in 2014

Date of Construction 1957

Tank Contents Jet-A

Tank Serial Number N/A

Tank Diameter 67’-0”

Shell Height 46’-4”

Product Height 42’-0”

Tank Capacity 29,000 BBL (1,218,000 Gallons)*

Foundation Concrete Ringwall

Construction

Bottom: Lap Welded*

Shell: Butt Welded

Floating Roof: Butt Welded

Geodesic Dome Roof: Bolted

Material

Bottom: Carbon Steel A-36

Shell: Carbon Steel (Unknown Grade)

Floating Roof: Steel

Geodesic Dome Roof: Aluminum

Cathodic Protection Impressed Current Cathodic Protection (ICCP)

Interior Coating System N/A – External Inspection

Exterior Coating System Epoxy, Epoxy, Polyurethane (Assumed)

Level Gauging Enraf automatic tank gauge (ATG)

Overfill Protection High-level control valve (HLCV)

Piping Receipt 8-inch Receipt Carbon Steel

Main Suction 8-inch Main Suction Carbon Steel

Low Suction 4-inch Low Suction Carbon Steel

Type III Main Suction 12-inch Type III Main Suction Carbon Steel

Water Draw-Off 2-inch Draw-Off Carbon Steel

Level Alarms Low, low-low, high, and high-high

Type of Internal Floating Roof Steel Pontoon

*Notes:

Previous out-of-service inspection report dated March 2014 and in-service inspection report dated November 2006 were available for review and comparison. Strapping charts were provided for tank capacity.

A. GENERAL PROJECT INFORMATION

1. API 653 IN-SERVICE (EXTERNAL) INSPECTION

The in-service inspection was performed 19 November 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

Proudly serving the Arkansas, Louisiana, and Texas region for more than 80 years, Barksdale AFB is in the northwest corner of Louisiana in Bossier City. Bossier lies just across the Red River in Caddo Parish.

The base is 190 miles east of Dallas and 204 miles west of Jackson, Mississippi. The region has easy access to other major cities in Texas, Arkansas, and Mississippi.

Barksdale AFB is home to the 2nd Bomb Wing and the Air Force’s major command, Air Force Global

Strike Command (AFGSC). AFGSC, activated in August 2009, provides combat-ready forces to conduct strategic nuclear deterrence and global strikes to support combatant commanders. Barksdale is also home to the Air Force Reserve’s 307th Bomb Wing. The “Mighty Eighth” Air Force of World War II fame is headquartered at the base as well.

B. TANK INSPECTION COMMENTS

1. TANK CONSTRUCTION

Tank 5932 is a welded, steel, vertical, aboveground Jet-A storage tank. The tank was constructed in 1957 to the design standard API 12C and repaired by CAPE to API 650 12th Edition in 2014. The tank is 67’-0” in diameter and 46’-4” high. According to strapping charts provided by AmSpec in March 2015, Tank

5932 has a nominal capacity of approximately 29,000 BBL (1,218,000 gallons).

2. TANK FOUNDATION

Tank 5932 rests on a concrete ringwall foundation. Tank foundation exhibits cracking and sealant damage with voids and disbondment at concrete expansion joints. Grounding cable conduits located adjacent to the spiral staircase are not sealed. Cracking, sealant voids, and unsealed grounding conduits in the tank foundation may allow for fluid to escape the containment in the event of a spill. A settlement evaluation was performed during the inspection.

No signs of settlement 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 courses. Shell plates were examined using

UTT and 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.

The tank is equipped with thirteen (13) nozzle penetrations: Two (2) 36-inch manways, one (1) 4-inch tank drain, one (1) 8-inch main suction, two (2) 1-inch penetrations for the low level alarm (LLA) and low-low level alarm (LLLA), one (1) 8-inch receipt, one (1) 12-inch Type III main suction, one (1) 2-inch water draw-off, two (2) 1-inch penetrations for the high level alarms (HLA)/ high-high level alarm

(HHLA), and two (2) 1-inch penetrations for the high level control valve (HLCV) float pilot.

One (1) distortion was observed above Manway 1. According to facility personnel, the dent was acquired during the CAPE repairs completed in April 2015 and was tested via NDT. Testing and evaluations performed by CAPE in 2015 indicated no significant signs of stress or shell weakening.

5. TANK APPURTENANCES

a. GEODESIC DOME ROOF

The tank is equipped with a geodesic dome roof. The geodesic dome roof was examined using

VT methods. Evidence of water accumulation was observed on the internal floating roof (IFR), indicating that the geodesic dome roof is not properly sealed. This repair is listed in the current Barksdale AFB Draft Repairs scope of work (SOW).

The geodesic dome roof is provided with five (5) nozzle penetrations: One (1) 8-inch Enraf

ATG, one (1) 36-inch x 36-inch sampling hatch, one (1) 6-inch Vito temperature/water combination probe, one (1) 8-inch manual gauging hatch, and one (1) center vent.

b. GAUGING

The tank is provided with an 8-inch gauging hatch for manual gauging and an 8-inch Enraf

ATG system for automatic tank gauging. A mechanical tape level gauge for monitoring product level from the ground is not provided for Tank 5932. Both the manual gauging hatch and ATG are provided with a fully slotted stilling well.

c. LEVEL ALARMS

The tank is provided with independent, shell mounted alarms at the low, low-low, high, and high-high positions. According to facility personnel, all level alarms are functioning properly.

Threaded connections are provided for the LLA, LLLA, HLA, HHLA, and HLCV float pilot.

Threaded connections are no longer used as they are potential leak paths. No weeping or leakage was observed during inspection. Minor signs of crevice corrosion and corrosion staining were observed at threaded connections.

d. STAIRS AND PLATFORMS

The tank is provided with a spiral staircase with two (2) work platforms for level alarm access and maintenance, and one (1) upper platform for fixed roof access. One (1) access staircase support exhibits insufficient weld spacing at the tank chime. Stair tread widths were measured and are approximately 20-inches wide. The Occupational Health and Safety

Administration (OSHA) mandates that staircases have a minimum stair tread width of 22-inches.

e. GROUNDING AND BONDING

The tank shell is equipped with nine (9) grounding lugs and cables that are in good overall condition with no signs of fraying or disbondment. The spiral staircase is not provided a grounding system integrated into the existing tank grounding system.

6. TANK AND PIPING COATING

The tank is assumed to be provided with an epoxy/polyurethane coating system. External tank shell coating exhibits chalking, indicating the polyurethane topcoat is reaching the end of its life cycle.

Conducting a coating condition survey will determine if the entire coating system should be replaced, or if only a topcoat application is required. External coatings at the main suction and low suction double block and bleed (DB&B) flange connections exhibit failure with surface corrosion and base metal exposure.

7. TANK PIPING SYSTEM

One (1) thermal relief valve (TRV) provided for the 12-inch Type III main suction piping is rated for vapor service. Vapor service TRVs should be replaced with TRVs rated for liquid service as the valves may not relieve pressure at the rated set pressure in the event of over-pressurization. The 8-inch main suction piping is not provided with a TRV system for relieving over-pressurization of piping that may become isolated.

The 8-inch receipt is provided with a HLCV with one (1) DB&B valve installed downstream of the HLCV.

DB&B valves should be provided both upstream and downstream of the HLCV to allow for isolation of the HLCV for maintenance and repair activities. The main suction line is provided with a ball valve located adjacent to the tank. DB&B valves are recommended at this location to allow for positive shutoff that can be verified by opening the cavity between the two blocks. Receipt piping is equipped with a 4-inch Weld-o-Let. It is recommended to replace the fitting with a fully welded tee fitting. Threaded connections are provided for the product recovery tank (PRT) and water draw-off piping. Threaded connections are no longer used as they are potential leak paths. No weeping or leakage was observed during inspection.

8. FIRE PROTECTION SYSTEM

For internal fire protection, Tank 5932 is provided with a pontoon, lap welded, carbon steel IFR. The current IFR double wiper seal and penetration seals are deteriorating and no longer adequately sealing.

Repair of the IFR double wiper seal and penetration seals are listed in the current Barksdale AFB Draft

Repairs SOW.

9. SECONDARY CONTAINMENT

Tank 5932 is equipped with an earthen dike and a flexible membrane liner (FML) covered with gravel.

Vegetation growth was observed throughout the secondary containment. The secondary containment is equipped with one (1) drain with a valve in the normally closed position. The drain is gravity fed to an oil water separator when the valve is open to drain the secondary containment. According to facility personnel, the secondary containment drainage system is fully functional.

C. FINDINGS AND RECOMMENDATIONS

Based on the in-service API 653 inspection of Tank 5932 located at Barksdale AFB in Bossier, Louisiana, 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 AW 78-24-27, NFPA 407, and industry standards

1. MANDATORY REPAIRS PER API 653, UFC 3-460-01, OR DoD 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 5932 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 and Piping Coating

OBSERVATION: Approximately 11,300 ft2 (100%) of the external tank shell coating exhibits chalking, indicating the polyurethane topcoat is reaching the end of its life cycle.

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

RECOMMENDATION: Conduct a coating condition survey to determine if the entire coating system should be replaced, or if only a topcoat application is required.

b. Tank and Piping Coating

OBSERVATION: Approximately 15 ft2 of the external coating at the main suction and low suction

DB&B flange connections exhibit failure with surface corrosion and base metal exposure.

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

RECOMMENDATION: Provide approximately 15 ft2 of coating repair at the main suction and low suction

DB&B flange connections.

c. Tank Foundation

OBSERVATION: Tank foundation exhibits approximately 30 linear feet of cracking and sealant damage with voids and disbondment at concrete expansion joints.

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

RECOMMENDATION: Provide approximately 30 linear feet of sealant at concrete expansion joints and foundation cracks.

d. Tank Foundation

OBSERVATION: Unused grounding cable conduits are not sealed.

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

RECOMMENDATION: Provide approximately 1 linear foot of sealant at out-of-service grounding cable casing.

e. Tank Appurtenances

OBSERVATION: Threaded connections are provided for the LLA, LLLA, HLA, HHLA, HLCV float pilot, water draw-off piping, and PRT piping. Minor signs of crevice corrosion and corrosion staining were observed at threaded connections.

REFERENCE: UFC 3-460-01, Section 9-8.D

RECOMMENDATION: Provide flange connections or socket welds at the LLA, LLLA, HLA, HHLA, HLCV float pilot, water draw-off piping, and PRT inlet.

f. Tank Piping System

OBSERVATION: The product receipt does not have a DB&B valve directly upstream of the HLCV.

REFERENCE: UFC 3-460-01, Section 6-5.D

RECOMMENDATION: Provide one (1) DB&B valve upstream of the HLCV to permit isolation of system components for maintenance or repair.

g. Tank Piping System

OBSERVATION: The main suction piping is not equipped with a TRV and crossover piping.

REFERENCE: UFC 3-460-01, Section 9-2.1.E

RECOMMENDATION: Provide one (1) liquid service TRV and associated crossover piping on the main suction piping to relieve excessive pressures caused by thermal expansion of liquid trapped between isolation points.

h. Tank Piping System

OBSERVATION: TRV for the Type III main suction piping is rated for vapor service.

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

RECOMMENDATION: Replace one (1) TRV located on the Type III main suction piping with a liquid service TRV. The valve nameplate must list liquid flow capacity in gallons per minute (GPM) only.

i. Stairs and Platforms

OBSERVATION: Spiral staircase support weld is less than the required 3-inches from the thank chime.

REFERENCE: API 650, Figure 5.6

RECOMMENDATION: Perform magnetic particle (MT) or dye penetrant (PT) testing at one (1) spiral staircase support adjacent to the tank chime.

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.

j. Gauging

OBSERVATION: Tank 5932 is not provided a mechanical TLG for monitoring product level from the ground.

REFERENCE: UFC 3-460-01, Table 8-1, Item Q

RECOMMENDATION: Provide one (1) mechanical tape level gauge calibrated in 1/16-inch graduations mounted at 60 inches above the walking surface.

k. Grounding and Bonding

OBSERVATION: The spiral staircase is not provided a grounding system integrated into the existing tank grounding system.

REFERENCE: AW 78-24-27, Drawing CD.06, Note 2

RECOMMENDATION: Attach one (1) grounding cable to the spiral staircase. The grounding cable should be connected to the tank grounding system.

l. Stairs and Platforms

OBSERVATION: The spiral staircase treads are not the required minimum 22-inches wide.

REFERENCE: OSHA 1926.1052(A)(1)

RECOMMENDATION: Rework the spiral staircase to increase the stair treads to a minimum 22-inches.

m. Secondary Containment

OBSERVATION: Vegetation growth was observed throughout the secondary containment.

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

RECOMMENDATION: Remove vegetation in the secondary containment to prevent roots penetrating the

FML.

n. Tank Piping System

OBSERVATION: Inlet piping Weldolet attachment for the main suction does not have adequate volume of filler metal.

REFERENCE: BMP

RECOMMENDATION: Replace Weldolet connection with a standard reducing tee branch connection.

o. Fire Protection System

OBSERVATION: IFR seal is deteriorating and no longer adequately sealing.

REFERENCE: API 650, Appendix H, Section H.4.1.2

RECOMMENDATION: Replace the IFR seal to include all penetration seals. This recommendation is currently listed in the Barksdale AFB Draft Repairs SOW.

p. Geodesic Dome Roof

OBSERVATION: Evidence of fluid accumulation on top of the IFR was observed during inspection.

REFERENCE: API 650, Appendix G, Section G.2.5

RECOMMENDATION: Seal the geodesic dome roof and the skylights. This recommendation is currently listed in the Barksdale AFB Draft Repairs SOW.

q. Tank Piping System

OBSERVATION: The main suction piping is not equipped with a DB&B valve.

REFERENCE: BMP

RECOMMENDATION: Replace one (1) ball valve with a DB&B valve located on the main suction line.

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

API-653 APPENDIX A SHELL SETTLEMENT EVALUATION

(para. B.2.2.4)

Report No Client Inspector Vessel Date Barksdale AFB Tank

5932 USACE Chris Thompson Tank 5932 12/02/2019

Base Elev Max Elev Elev

FT 1.604 1.802 0.198 R^2 = 0.714

IN 19.248 21.624 2.376

The optimum cosine curve used in the shell settlement evaluation per API 653 para. B.2.2.4 is invalid as R2 is less than 0.90. As an alternative, the evaluation provided in API 653 para. B.2.2.5 was used in determining shell settlement. See next page.

(para. B.2.2.5) Report No. Client Inspector Vessel Date

Barksdale AFB Tank 5932 USACE Chris Thompson Tank 5932 12/2/2019

Base Elev Max Elev Elev

FT 1.604 1.802 0.198

IN 19.248 21.624 2.376

Report No.: Barksdale AFB Tank 5932

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

67 46.3 F Unknown 30000 29000000 5.800

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 PE2 Sarc Si Smax Results

1 1.625 0 1.625 184.1 0.000 1.598 SAT

2 1.667 45 1.646 184.1 0.254 1.598 SAT

3 1.688 90 1.667 184.1 0.255 1.598 SAT

4 1.802 135 1.688 184.1 1.373 1.598 SAT

5 1.604 180 1.708 184.1 1.253 1.598 SAT

6 1.781 225 1.729 184.1 0.621 1.598 SAT

7 1.792 270 1.750 184.1 0.502 1.598 SAT

8 1.771 315 1.771 26.3 0.000 0.228 SAT

TABLE 1 - SHELL UT MEASUREMENTS

Roof Notes:

Shell Course 7

Plate 7-1 Plate 7-2 Plate 7-3 Plate 7-4 Plate 7-5 Plate 7-6 Plate 7-7 Thickness represented in inches .249 .262 .267 Average Shell Course 1: 0.483”

N/A N/A N/A N/A N/A .259 .259 .252 N/A Average Shell Course 2: 0.419” .263 .257 .248 Average Shell Course 3: 0.343”

Avg. .257 Average Shell Course 4: 0.286” Circumferential Weld C7 Average Shell Course 5: 0.256”

Shell Course 6

Plate 6-1 Plate 6-2 Plate 6-3 Plate 6-4 Plate 6-5 Plate 6-6 Plate 6-7 Average Shell Course 6: 0.265” .254 .266 .269 Average Shell Course 7: 0.257”

N/A N/A N/A N/A .258 .269 .270 N/A N/A Refer to Drawing A-1 for plate numbers .265 .269 .262

Avg. .265 Circumferential Weld C6

Shell Course 5

Plate 5-1 Plate 5-2 Plate 5-3 Plate 5-4 Plate 5-5 Plate 5-6 Plate 5-7 .248 .260 .260

N/A N/A N/A N/A .254 .261 .255 N/A N/A .258 .261 .248

Avg. .256 Circumferential Weld C5

Shell Course 4

Plate 4-1 Plate 4-2 Plate 4-3 Plate 4-4 Plate 4-5 Plate 4-6 Plate 4-7 .275 .290 .288

N/A N/A N/A N/A .284 .291 .285 N/A N/A .289 .290 .284

Avg. .286 Circumferential Weld C4

Shell Course 3

Plate 3-1 Plate 3-2 Plate 3-3 Plate 3-4 Plate 3-5 Plate 3-6 Plate 3-7 .336 .330 .354

N/A N/A N/A .334 .353 .352 N/A N/A N/A .331 .355 .346

Avg. .343 Circumferential Weld C3

Shell Course 2

Plate 2-1 Plate 2-2 Plate 2-3 Plate 2-4 Plate 2-5 Plate 2-6 Plate 2-7 .416 .427 .419

N/A N/A N/A .420 .423 .409 N/A N/A N/A .421 .422 .411

Avg. .419 Circumferential Weld C2

Shell Course 1

Plate 1-1 Plate 1-2 Plate 1-3 Plate 1-4 Plate 1-5 Plate 1-6 Plate 1-7 Plate 1-8 Plate 1-9 Plate 1-10 .458 .469 .461 .477 .484 .470 .464 .473 .474 .541 .515 .514 .462 .469 .478 .480 .468 .463 .463 .473 .465 .458 .465 .452 .462 .472 .461 .507 .511 .505 .469 .478 .461 .481 .540 .475 .471 .484 .483 .540 .514 .515 .469 .482 .487 .489 .477 .467 .466 .539 .467 .463 .472 .452 .471 .481 .486 .522 .511 .510 .468 .479 .464 .540 .540 .471 .469 .481 .482 .511 .510 .510 .468 .479 .486 .488 .474 .466 .464 .478 .465 .462 .473 .451 .470 .478 .485 .508 .510 .511

Avg. .467 .498 .476 .519 .476 .475 .476 .461 .474 .511 Circumferential Weld C1

SHELL MINIMUM THICKNESS CALCULATIONS

Tank Shell Minimum Thickness and Remaining Life Calculations Date 12/02/2019

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

3426 Barksdale AFB Tank

USACE Tank 5932 Chris Tho 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) 67 G 0.84 E 0.85 Fill Height (ft) 42.0

Material Crs H (ft) H (ft) S (psi) tmin (inch) Course 1 Unknown 7 42.0 23600 0.299 Course 2 Unknown 7 35.0 23600 0.248 Course 3 Unknown 7 28.0 26000 0.179 Course 4 Unknown 7 21.0 26000 0.132 Course 5 Unknown 6.75 14.0 26000 0.100 Course 6 Unknown 6.75 7.3 26000 0.100 Course 7 Unknown 5 0.5 26000 0.100

SHELL REMAINING LIFE CALCULATIONS

Previous UTT measurements taken during the 2006 external inspection were used as UTT measurements are not provided in the 2014 preliminary internal inspection report.

Tank Shell Minimum Thickness and Remaining Life Calculations Date 12/02/2019

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

3426 Barksdale AFB Tank

USACE Tank 5932 Chris Tho

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

Y = 13 = 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 0.465 0.483 0.299 0.184 0.0000 >40 67.21 Course 2 0.410 0.419 0.248 0.171 0.0000 >40 65.44 Course 3 0.323 0.343 0.179 0.164 0.0000 >40 66.80 Course 4 0.269 0.286 0.132 0.154 0.0000 >40 65.19 Course 5 0.242 0.256 0.100 0.156 0.0000 >40 67.66 Course 6 0.251 0.265 0.100 0.165 0.0000 >40 75.77 Course 7 0.244 0.257 0.100 0.157 0.0000 >40 81.31

TABLE 2 - SHELL NOZZLE / REPAD UT MEASUREMENTS

Nozzle Nozzle Size

(Diameter or Width/Height)

Repad Shape

Repad Size

(WxH)

Repad Thickness

Nozzle Thickness H1 H2

Nozzle Location (Measured circumferentially from Manway 1)

Notes

0⁰ 90⁰ 180⁰ 270⁰

MW1 36'' B 72'' .521 .504 .504 .504 .503 3'-5'' 0'-5" 0 Manway N1 4'' C 12"x16" .599 .349 .358 .380 .356 1'-0'' 0'-6" 66'-2'' Drain N2 8'' D 24"x20" .583 .511 .539 .492 .493 0'-11" - 78'-0'' Main Suction

N3 1'' - - - TH TH TH TH 0'-11" 0'-10" 92'-3'' LLA/LLLA

N4 1'' - - - TH TH TH TH 0'-7" 0'-7" 92'-3'' LLA/LLLA

MW2 36'' D 74"x77" .521 .504 .504 .504 .503 3'-5'' - 106'-2" Manway N5 8'' D 24"x20" .599 .349 .358 .380 .356 0'-11" - 121'-8" Receipt

N6 1'' - - - TH TH TH TH 1'-0'' 0'-11" 168'-10" HLA/HHLA

N7 1'' - - - TH TH TH TH 2'-4'' 2'-3" 168'-10" HLA/HHLA

N8 1'' - - - TH TH TH TH 1'-2'' 1'-1" 169'-10" HLCV Float Pilot N9 1'' - - - TH TH TH TH 3'-0'' 2'-11" 169'-10" HLCV Float Pilot

N10 12'' E 34"x26" .583 .511 .539 .492 .493 1'-5'' 0'-4" 177'-0" Type III Main Suction N11 2'' - - - .176 .189 .177 .190 0'-6" 0'-5" 184'-6'' Water Draw-off

Refer to drawing A-1 in Appendix A for nozzle numbers and locations.

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.

Repad Shapes:

TABLE 3 - SHELL DFT MEASUREMENTS

External Shell Coating Thickness

Average Standard Deviation Number of Readings Minimum Maximum

10.78 2.16 45 7.59 16.35

Thicknesses are represented in mils.

TABLE 4 - SHELL SETTLEMENT MEASUREMENTS

Point Arc Length (ft.) Tank Chime (ft.)

1 0.00 1.625 2 26.31 1.667 3 52.62 1.688 4 78.93 1.802 5 105.24 1.604 6 131.55 1.781 7 157.87 1.792 8 184.18 1.771

Settlement points were measured clockwise from MW1.

The listed data should be used in future API inspections for comparison.

GROUNDING CABLE

(TYP. 9)

N6

N7

MW1

7'-0"

7'-0"

7'-0"

7'-0"

6'-9"

6'-9"

5'-0"

1'-6"

ORIGINAL BOTTOM

NEW BOTTOM

N8

N9

N1

N2

MW2

N3

N10

N11

N4

N5

GEODESIC DOME

SUPPORT RING

AFFF SUPPORT

(TYP. 5)

TLG SUPPORT

(TYP. 8)

GEODESIC DOME ROOF

1-1 1-2 1-3 1-4 1-5 1-6 1-7 1-8

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

3-1 3-2 3-3 3-4 3-5 3-63-7

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

5-75-65-55-45-35-25-1

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

7-77-67-57-47-37-27-1

1-9

INSERT PLATE

(TYP. 6)

AFFF

(TYP. 6)

SPIRAL

STAIRCASE

NOTES:

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

APPENDIX B FOR INDIVIDUAL SHELL PLATE UTT READINGS.

2. REFER TO TABLE 2, "SHELL NOZZLE / REPAD UT

MEASUREMENTS", 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

A I R

F

R

C E

L A

C K

L A

N D

T

X

C I V

I L

E

N G

I N

E E

R

C

E N

T E

R

S H

R E

V E

P O

R T

L A

B A

R K

S D

A

A

F B

T A

K

L A

Y O

U T

N T

S

N A

W F

D

W F

F

A N

S I

B

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

D A

W

A E

C

C A

W

N A

TANK INFORMATION

TANK NO.: TANK 5932

MANUFACTURER: UNKNOWN

YEAR BUILT: 1957

TANK DIAMETER: 67'-0"

TANK HEIGHT: 46'-7"

NOMINAL CAPACITY: 29,000 BBL

PRODUCT: JET-A

PRODUCT SPECIFIC GRAVITY: 0.85

GPS COORDINATES: 32.491695°, -93.669182°

N A

S H

E L L

L A

Y O

U T

A-1

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 thicknesses provided by the external inspection report dated November 2006 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; November 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; November 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 inspection report dated March 2014, the next internal inspection should be performed within ten (10) years of new bottom installation completion date of April 2015 with cathodic protection.

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

Ten (10) years; April 2025 (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 22 N/A Fail

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. Make a note to do additional bottom plate examination (ultrasonic, hammer testing, or turning of coupons) when the tank is out of service.

N/A

C.1.1.5 Site Drainage a Check site for drainage away from the tank and associated piping and manifolds. X b Check operating condition of the dike drains. X

C.1.1.6 Housekeeping

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

C.1.1.7 Cathodic Protection a Review cathodic protection potential readings. X

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. X

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

Tank In-Service Inspection Checklist Continued

Item Completed

X 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.

X b Check support welds to shell for pitting, especially on shell plates. X c Note whether supports have reinforcing pads welded to shell. No

C.1.3 Shell Appurtenances

C.1.3.1 Manways and Nozzles a Inspect for cracks or signs of leakage on weld joint at nozzles, manways, and reinforcing plates. X b Inspect for shell plate dimpling around nozzles, caused by excessive pipe deflection. X c Inspect for flange leaks and leaks around bolting. X d Inspect sealing of insulation around manways and nozzles. N/A e Check for inadequate manway flange and cover thickness on mixer manways. N/A

C.1.3.2 Tank Piping Manifolds a Inspect manifold piping, flanges, and valves for leaks. X b Inspect fire fighting 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. X 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. N/A b Inspect autogauge head for damage. N/A c Bump the checker on autogauge head for proper movement of tape. N/A 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). N/A f Compare actual product level to the reading on the autogauge (maximum variation is 2 in.). N/A g On floating roof tanks, when the roof is in the lowest position, check that no more than two ft 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

Completed

X 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. N/A b Inspect for leakage. N/A c Inspect condition of power lines and connections to mixer. N/A

C.1.3.7 Swing Lines: Winch Operation a Nonfloating. Raise, then lower the swing line with the winch, and check for cable tightness to confirm that swing line lowered properly.

b Floating. With tank half full or more, lower the swing line, then let out cable and check if swing has pulled cable tight, indicating that the winch is operating properly.

c

Indicator. Check that the indicator moves in the proper direction: Floating swing line indicators show a lower level as cable is wound up on the winch. Non-floating swing line indicators show the opposite.

C.1.3.8 Swing Lines: External Guide System

Check for leaks at threaded and flanged joints. N/A

C.1.3.9 Swing Lines: Identify Ballast Varying Need

Check for significant difference in stock specific gravity. N/A

C.1.3.10 Swing Lines: Cable Material and Condition a For nonstainless steel cable, check for corrosion over entire length. N/A b All cable: check for wear or fraying. N/A

C.1.3.11 Swing Lines: Product Sample Comparison

Check for water or gravity differences that would indicate a leaking swing joint. N/A

C.1.3.12 Swing Lines: Target a Target should indicate direction of swing opening (up or down) and height above bottom where suction will be lost with swing on bottom support.

N/A

C.1.4 Roofs

C.1.4.1 Deck Plate Internal Corrosion

For safety, before accessing the roof, check with ultrasonic instrument or lightly use a ball peen hammer to test the deck plate near the edge of the roof for thinning. (Corrosion normally attacks the deck plate at the edge of a fixed roof and at the rafters in the center of the roof first.)

C.1.4.2 Deck Plate External Corrosion

Visually inspect for paint failure, holes, pitting, and corrosion product on the roof deck. x

C.1.4.3 Roof Deck Drainage

Look for indication of standing water. (Significant sagging of fixed roof deck indicates potential rafter failure. Large standing water areas on a floating roof indicate inadequate drainage design or, if to one side, a nonlevel roof with possible leaking pontoons.)

x

Completed

X

C.1.4.4 Level of Floating Roof a

At several locations, measure distance from roof rim to a horizontal weld seam above the roof. A variance in the readings indicates a nonlevel roof with possible shell out-of-round, out-of-plumb, leaking pontoons, or hang-up. On small diameter tanks, an unlevel condition can indicate unequal loading at that level.

N/A

C.1.4.5 Gas Test Internal Floating Roof a Test for explosive gas on top of the internal floating roof. Readings could indicate a leaking roof, leaking seal system, or inadequate ventilation of the area above the internal floating roof.

N/A

C.1.4.6 Roof Insulation a Visually inspect for cracks or leaks in the insulation weather coat where runoff rain water could penetrate the insulation.

N/A b Inspect for wet insulation under the weather coat. N/A c Remove small test sections of insulation and check roof deck for corrosion and holes near the edge of the insulated area.

N/A

C.1.4.7 Floating Roof Seal Systems a Inspect the condition of the seal, measure and record maximum rim spaces and seal-to-shell gaps around the full roof circumference at the level of inspection.

X

NOTE Inspection of the seal and measurement of the rim spaces and seal-to-shell gaps at more than one level may be necessary to more fully determine if any problems exist at other levels of tank operation).

b Measure and record annular space at 30-ft spacing (minimum of four quadrants) around roof and record. Measurements should be taken in directly opposite pairs.

N/A

1) _______ _______ Opposite pair 1. N/A

2) _______ _______ Opposite pair 2. N/A c Check if seal fabric on primary shoe seals is pulling shoes away from shell (fabric not wide enough). N/A d Inspect fabric for deterioration, holes, tears, and cracks. N/A e Inspect visible metallic parts for corrosion and wear. N/A f Inspect for openings in seals that would permit vapor emissions. N/A g Inspect for protruding bolt or rivet heads against the shell. N/A h Pull both primary and secondary seal systems back all around the shell to check their operation. N/A i Inspect secondary seals for signs of buckling or indications that their angle with the shell is too shallow.

N/A j Inspect wedge-type wiper seals for flexibility, resilience, cracks, and tears. N/A

C.1.5 Roof Appurtenances

C.1.5.1 Sample Hatch a Inspect condition and functioning of sample hatch cover. X b On tanks governed by Air Quality Monitoring District rules, check for the condition of seal inside hatch cover.

N/A c Check for corrosion and plugging on thief and gauge hatch cover. X d Where sample hatch is used to reel gauge stock level, check for marker and tab stating hold-off distance.

X e Check for reinforcing pad where sample hatch pipe penetrates the roof deck. X

Completed

X f On floating roof sample hatch and recoil systems, inspect operation of recoil reel and condition of rope.

N/A g Test operation of system. N/A h On ultra clean stocks such as JP4, check for presence and condition of protective coating or liner inside sample hatch (preventing rust from pipe getting into sample).

X

C.1.5.2 Gauge Well a Inspect visible portion of the gauge well for thinning, size of slots, and cover condition. X b Check for a hold-off distance marker and tab with hold-off distance (legible). N/A c On floating roofs, inspect condition of roof guide for gauge well, particularly the condition of the rollers for grooving.

N/A d If accessible, check the distance from the gauge well pipe to the tank shell at different levels. N/A e If tank has a gauge well washer, check valve for leakage and for presence of a bull plug or blind flange.

N/A

C.1.5.3 Fixed Roof Scaffold Support

Inspect scaffold support for corrosion, wear, and structural soundness. N/A

C.1.5.4 Autogauge: Inspection Hatch and Guides (Fixed Roof) a Check the hatch for corrosion and missing bolts. X b Look for corrosion on the tape guide’s and float guide’s wire anchors. X

C.1.5.5 Autogauge: Float Well Cover a Inspect for corrosion. N/A b Check tape cable for wear or fraying caused by rubbing on the cover. N/A

C.1.5.6 Sample Hatch (Internal Floating Roof) a Check overall conditions. X b When equipped with a fabric seal, check for automatic sealing after sampling. X c When equipped with a recoil reel opening device, check for proper operations. X

C.1.5.7 Roof-mounted Vents (Internal Floating Roof)

Check condition of screens, locking and pivot pins. X

C.1.5.8 Gauging Platform Drip Ring a On fixed roof tanks with drip rings under the gauging platform or sampling area, inspect for plugged drain return to the tank.

N/A

C.1.5.9 Emergency Roof Drains a Inspect vapor plugs for emergency drain: that seal fabric discs are slightly smaller than the pipe ID and that fabric seal is above the liquid level.

N/A

C.1.5.10 Removable Roof Leg Racks a Check for leg racks on roof. N/A

C.1.5.11 Vacuum Breakers a Report size, number, and type of vacuum breakers. Inspect vacuum breakers. If high legs are set, check for setting of mechanical breaker in high leg position.

N/A

C.1.5.12 Rim Vents a Check condition of the screen on the rim vent cover. N/A

Completed

X b Check for plating off or removal of rim vents where jurisdictional rules do not permit removal. N/A

C.1.5.13 Pontoon Inspection Hatches a Open pontoon inspection hatch covers and visually check inside for pontoon leakage. N/A b Test for explosive gas (an indicator of vapor space leaks). N/A c If pontoon hatches are equipped with locked down coves, check for vent tubes. Check that vent tubes are not plugged up. Inspect lock-down devices for condition and operation.

N/A

C.1.6.1 Accessways

See Tank Out-of-service Inspection Checklist, Item C.2.12. X

NOTES:

APPENDIX C: PHOTOGRAPHS

C.1: Tank 5932 North View C.2: Tank 5932 South View

C.3: Tank 5932 East View C.4: Tank 5932 West View

C.5: Receipt Piping C.6: Main Suction Piping

C.7: Water Draw-off Piping C.8: PRT

C.9: Type III Main Suction C.10: Grounding Cable

C.11: Manway 2 C.12: AFFF Discharge Chamber

C.13: Enraf ATG C.14: HLA/HHLA

C.15: HLCV Float Pilot C.16: Leak Detection Port

C.17: Secondary Containment Drain C.18: LLA/LLLA

C.19: Deformation Above Manway 2 C.20: Insertion Plates

C.21: Geodesic Dome Roof Overview C.22: Geodesic Dome Roof Overview

C.23: IFR Overview C.24: IFR Overview