Attachment J - FAC 4312 Inspection Report.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.

June 5, 2020

Ronald J. Weiser

Project Manager ronald.j.wieser@usace.army.mil

USACE, Omaha District

Contract Number: W9128F-17-D-0016

Task Order Number: W9128F20F0026

Submittal Number: 024

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

1. Robins ANG – Tank 1 (Facility 4312) In-Service Inspection Report (Final)

2. Robins ANG – Tank 1 (Facility 4312) - Attachment C

Respectfully submitted, Pond

Anthony E, Chinn, EIT

Program Manager | Mechanical Integrity chinna@pondco.com

678-591-5242

CC: John Anna - john.anna@us.af.mil

Michael Deeker - michael.deeker@dla.mil

Rueben Watson - ruben.watson@dla.mil

Daniel Cook - Daniel.1.cook@dla.mil

Michael Washington - michael.a.washington@dla.mil

James Lee - james.b.lee85.mil@mail.mil

Derek Jaudon - derek.s.jaudon.mil@mail.mil

Timothy Fetz - timothy.a.fetz.nfg@mail.mil mailto:ronald.j.wieser@usace.army.mil mailto:chinna@pondco.com mailto:john.anna@us.af.mil mailto:michael.deeker@dla.mil mailto:ruben.watson@dla.mil mailto:Daniel.1.cook@dla.mil mailto:michael.a.washington@dla.mil mailto:derek.s.jaudon.mil@mail.mil mailto:timothy.a.fetz.nfg@mail.mil

US Army Corps of Engineers Omaha District

API 653 In-Service Inspection Report

Robins Air National Guard Facility 4312

Tank 1

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

(USACE POL-MCX)

4/15/2020

API 653 Inspection Report Robins ANG, Georgia

Table of Contents

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 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 DoD AW 78-24-27

2. SHORT-TERM RECOMMENDED REPAIRS

3. LONG-TERM RECOMMENDED REPAIRS

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

NEXT INSPECTION

API/OSHA ACCESS STRUCTURE REPORT

APPENDIX B: API 653 CHECKLISTS FOR TANK INSPECTIONS

APPENDIX C: PHOTOGRAPHS

ACRONYMS AND ABBREVIATIONS

ANG Air National Guard

API American Petroleum Institute

ATG Automatic Tank Gauge

BBL Barrel

CP Cathodic Protection

DB&B Double Block and Bleed

DFT Dry Film Thickness

DoD Department of Defense

HHLA High-High Level Alarm

HLA High Level Alarm

HLCV High Level Control Valve

IAW In Accordance With

IFR Internal Floating Roof

LLA Low Level Alarm

LLLA Low-Low Level Alarm

MT Magnetic Particle Testing

NDT Non-Destructive Testing

NFPA National Fire Protection Association

OOS Out-of-Service

OSHA Occupational Health and Safety Administration

PST Product Saver Tank

PT Dye Penetrant Testing

RMMR Recurring Maintenance and Minor Repair

STARS Surveillance Target Attack Radar System

TLG Tape Level Gauge

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 tank inspection for Tank 1 (Facility 4312) at Robins Air National Guard (ANG) in Warner Robins, Georgia.

The in-service inspection was performed 15 April 2020. 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) Standard Design AW 78-24-27, National

Fire Protection Association (NFPA) 407, Occupational Health and Safety Administration (OSHA) guidelines, and industry standards.

Tank 1 is a welded, steel, vertical, aboveground Jet A (F-24) storage tank. The tank was constructed by Industrial

Alloy Fabricators in 1998 to API 650 standards and altered by Cape in 2016 to API 653 4th edition, addendum 3. The tank is 36’-8” in diameter and 40’-0” high with a nominal capacity of 7,077 barrels (BBL) (297,234 gallons).

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

Edition. This report contains 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 – Tank Inspection Comments. 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: 15 April 2020 Equipment Used:

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

Manufacturer: Fischer 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):

Andrew D. Morrissette Christopher A. Walker, EIT

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 (OOS) (Internal) Inspection Date: March 2015 API In-Service (External) Inspection Date: March 2015

RECOMMENDED FUTURE INSPECTION DATES

API OOS (Internal) Inspection Date: March 2025* API In-Service (External) Inspection Date: April 2025 *OOS inspection date based on the previous OOS inspection report dated March 2015.

Andrew D. Morrissette Christopher A. Walker, EIT

Integrity Engineer Integrity Engineer

API 653 Inspector # 80109 API 570 Inspector # 85282

ASNT NDT Level I/II ASNT NDT Level I/II

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner Georgia ANG / US Air Force

Location Robins ANG

Facility Number Facility 4312

Tank Number Tank 1

State / Country Georgia, USA

City Warner Robins

Inspection Date 15 April 2020

Tank Manufacturer Industrial Alloy Fabricators, Inc.

Design Standard API 650

Date of Construction 1998

Tank Contents Jet-A (F-24)

Tank Serial Number S/E 424-2

Tank Diameter 36’-8”

Shell Height 40’-0”

Max Product Height 37’-7 ½”

Tank Capacity 7,077 BBL (297,234 gallons)

Foundation Concrete Pad

Construction

Bottom: Butt-Welded / Cone-Down(1)

Shell: Butt-Welded

Fixed Roof: Lap-Welded

Floating Roof: Aluminum Honeycomb Pan

Material

Bottom: Carbon Steel A-36(2)

Shell: Carbon Steel A-36(2)

Fixed Roof: Carbon Steel A-36(2)

Floating Roof: Aluminum

Cathodic Protection (CP) None – Concrete Pad Foundation

Interior Coating System Epoxy-Polyamide(2)

Exterior Coating System Epoxy-Polyamide with Urethane Topcoat(2)

Level Gauging Enraf Automatic Tank Gauge (ATG) Varec Tape Level Gauge (TLG)

Overfill Protection High Level Alarm (HLA) / High-High Level Alarm (HHLA) / High-Level Control Valve (HLCV) Float Pilot

Piping Receipt: 8-inch Stainless Steel

Main Suction: 12-inch Stainless Steel

Low Suction: 4-inch Stainless Steel

Water Draw-Off: 2-inch Stainless Steel

Level Alarms HLA/HHLA; Low Level Alarm (LLA) / Low-Low Level Alarm (LLLA)

Notes:

(1) Based on previous out-of-service inspection report dated March 2015.

(2) Construction drawings were available for review and comparison.

A. GENERAL PROJECT INFORMATION

1. API 653 IN-SERVICE (EXTERNAL) INSPECTION

The in-service inspection was performed 15 April 2020. 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 Standard Design AW 78-24-27, NFPA 407, OSHA guidelines, and industry standards.

2. SITE INFORMATION

The 116th Air Control Wing is a wing of the Georgia ANG/United States Air Force, stationed at Robins

Air Force Base, Georgia. If activated for federal service, the wing is gained by Air Combat Command.

The 116th Air Combat Command is the only ANG unit operating the E-8C Joint Surveillance Target

Attack Radar System (STARS), an airborne ground surveillance and battle management aircraft. Joint

STARS detects, locates, classifies, tracks and targets ground movements on the battlefield, communicating real-time information through secure data links with United States command posts.

B. TANK INSPECTION COMMENTS

1. TANK CONSTRUCTION

Tank 1 is a welded, carbon steel, vertical, aboveground Jet A (F-24) storage tank. The tank was constructed by Industrial Alloy Fabricators in 1998 to API 650 standards and altered by Cape in 2016 to

API 653 4th edition, addendum 3. The tank is 36’-8” in diameter and 40’-0” high with a nominal capacity of 7,077 BBL (297,234 gallons).

2. TANK FOUNDATION

Tank 1 rests on a concrete pad foundation. The tank is provided one (1) leak detection port, which was dry during inspection. The tank is provided with twenty (20) wind and seismic anchors. Tank wind and seismic anchors are distorted, warped, and may be under excess stress. One (1) anchor bolt is not of adequate length and does not exceed the associated hex nut. An analysis for the wind and seismic anchors should be performed to verify that current anchors are adequate.

A settlement evaluation was performed during the inspection. The settlement evaluation showed no signs of tank shell deformation and no visual signs of excessive piping stress were observed. See

Appendix A for settlement results.

3. CATHODIC PROTECTION

The tank is resting on a concrete pad and therefore, a CP system is not necessary. No evidence of bottom-side corrosion was observed in the previous OOS inspection report dated March 2015.

4. TANK SHELL

The tank shell is equipped with five (5) fully coated, 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. Ten (10) UTT measurements were taken on each of the 2nd through 5th shell courses using the spiral staircase for access. UTT measurements indicated no significant signs of metal loss on shell plates.

Tank 1 is not provided an emergency responder diamond IAW NFPA 704. Emergency responder diamonds are the established standard system for identification of hazardous materials present for emergency responders. Strapping charts are provided for Tank 1; however, current strapping charts are in 1/8-inch increments, whereas UFC mandates strapping charts be in 1/16-inch increments.

Refer to Drawing A-1, “Shell Layout”, in Appendix A for shell plate locations and Table 1, “Shell UTT

Measurements”, in Appendix A for shell plate UTT measurements.

5. FIXED ROOF

The tank fixed roof was examined using UTT and VT methods. Five (5) UTT measurements were taken on each fixed roof plate. UTT measurements indicated no significant signs of metal loss on fixed roof plates. Various depressions were observed on the fixed roof with water staining. No signs of significant corrosion were observed at depressions during inspection.

Refer to Drawing A-2, “Fixed Roof Layout”, in Appendix A for fixed roof plate locations and Table 2, “Fixed

Roof UTT Measurements”, in Appendix A for fixed roof plate UTT measurements.

6. TANK APPURTENANCES

a. TANK SHELL

Tank 1 is equipped with twelve (12) shell nozzle penetrations: two (2) 36-inch manways, one (1) 4-inch low suction, one (1) 12-inch main suction, one (1) 24-inch by 24-inch flush clean out, two (2) ¾-inch LLA/LLLA penetrations, one (1) 2-inch water draw-off, one (1) 2-inch product saver tank (PST) return, two (2) ¾-inch HLA/HHLA/HLCV float pilot assembly penetrations, and one (1) 8-inch receipt.

Clearance between the Manway 1 reinforcing pad toe weld and shell-to-bottom weld is approximately 2 ½-inches, whereas API mandates a minimum 3-inch clearance. No visual signs of stress cracking were observed.

Refer to Drawing A-1, “Shell Layout”, in Appendix A for shell nozzle locations and Table 3, “Shell

Nozzle/Repad UTT Measurement”, in Appendix A for nozzle and associated reinforcement pad UTT measurements.

b. FIXED ROOF

The fixed roof is provided sixteen (16) nozzle penetrations: two (2) 3-inch internal floating roof (IFR) anti-rotation cables, three (3) 12-inch temperature sensors, two (2) 36-inch by 30-inch IFR inspection hatches, two (2) 3-inch IFR grounding cables, one (1) 24-inch center vent, one (1) 8-inch blind flange, one (1) 2 ½-inch Varec TLG penetration, one (1) 72-inch by 24-inch IFR installation hatch, one (1) 10-inch sampling hatch, one (1) 10-inch Enraf ATG, and one (1) 4-inch Vito temperature/water probe.

Coating on IFR inspection hatches, three (3) temperature sensors, sampling hatch, Enraf ATG, and

IFR grounding cables exhibits chalking and base metal exposure with surface corrosion. One (1) IFR grounding cable and one (1) anti-rotation cable nozzles are provided with machined holes, allowing water ingress to the tank, which may collect on top of the floating pan. No evidence of water accumulation was observed on the floating pan during inspection. Confined space labeling at each of the two (2) fixed roof inspection hatches exhibits fading and peeling. The screen for the center vent is not properly attached to the vent, presenting a gap that allows wildlife to enter the tank.

Refer to Drawing A-2, “Fixed Roof Layout”, in Appendix A for shell nozzle locations and Table 3, “Nozzle/Repad UTT Measurement”, in Appendix A for nozzle and associated reinforcement pad UTT measurements.

c. GAUGING

The tank is provided with an Enraf ATG and Vito temperature/water probe for automatic gauging.

The Vito temperature/water probe is not provided a fully slotted stilling well to allow for proper temperature/water gauging during filling and issuing operations. Ten (10) fasteners on the Enraf

ATG exhibit general corrosion and one (1) fastener is missing. The tank is provided a sampling hatch for manual gauging and sampling operations.

d. LEVEL ALARMS

The tank is provided with independent, shell mounted level alarms in the low, low-low, high, and high-high positions as well as a HLCV for overfill protection. According to facility personnel, all level alarms and the HLCV float pilot are functioning properly.

e. STAIRS AND PLATFORMS

The tank is provided a spiral staircase with one (1) upper platform for fixed roof access, one (1) work platform for access to the HLA/HHLA/HLCV float pilot assembly, and one (1) mid-platform for access to Manway 2. The HLA/HHLA chamber extends into the path of the spiral staircase, allowing 21 ½-inches clearance between the appurtenance and staircase railing. OSHA mandates a minimum 26-inches clearance between appurtenances and staircase railings.

f. GROUNDING AND BONDING

The tank shell is equipped with four (4) grounding cables. Grounding cables are in good condition with no sign of damage, detachment, or deterioration. Sealant provided at four (4) grounding cable foundation penetrations exhibit voids, shrinkage, and disbondment, allowing a pathway for fluid to escape in the event of a spill.

7. TANK AND PIPING COATING

External coating for the tank shell and fixed roof is epoxy-polyamide with a urethane topcoat. External tank shell and fixed roof coating exhibits widespread chalking, indicating the coating system is near the end of its life cycle. Prior to recoat, it is recommended to perform a coating condition survey, including an adhesion test, or review a previous coating condition survey to determine whether a full recoat is required or if a topcoat reapplication will suffice.

A DFT survey was performed on the external tank shell and fixed roof. Refer to Table 4, “DFT

Measurements”, in Appendix A for tank shell and fixed roof DFT results.

Piping provided for Tank 1 is of stainless-steel construction and is not coated.

8. TANK PIPING SYSTEM

Piping within the containment dike is constructed of stainless steel and is in good overall condition with no signs of stress or corrosion. Flow arrows for the receipt and suction piping exhibit fading and peeling.

The tank receipt piping is not provided a double block and bleed (DB&B) valve directly upstream of the

HLCV to permit isolation of system components for maintenance or repair.

9. FIRE PROTECTION SYSTEM

For internal fire protection, an aluminum honeycomb IFR with double wiper seal is provided. The IFR is in good overall condition with no visual signs of damage or deterioration. Visual inspection of the IFR was limited due to accessibility.

10. SECONDARY CONTAINMENT

Tank 1 is located within a 90-foot long by 90-foot wide concrete secondary containment with containment dike walls 6-feet 6-inches high. The capacity of the secondary containment is approximately

393,850 gallons and meets the 1-foot capacity requirement of UFC. The secondary containment and associated control joint and cracking sealant are in good overall condition with no signs of deterioration.

C. FINDINGS AND RECOMMENDATIONS

Based on the in-service API 653 inspection of Tank 1 (Facility 4312) located at Robins ANG in Warner Robins, Georgia, preliminary 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 650/653, UFC 3-460-01/3-460-03, OR DoD AW 78-24-27

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

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

2. SHORT-TERM RECOMMENDED REPAIRS

Short-term recommended repairs are repairs that will assist in maintaining tank operability and serviceability or are required to meet current codes. Short-term recommended repairs should be performed within five (5) years of the inspection date.

2.1 Tank Shell Coating

OBSERVATION: External coating for the tank shell exhibits widespread chalking, indicating the coating system is near the end of its life cycle.

REFERENCE: UFC 3-460-01, Section 8-3.10

RECOMMENDATION: Provide a full recoat of the tank shell, approximately 5,500 ft2. Prior to recoat, perform a coating condition survey, or review the previous coating condition survey, to determine if a full recoat is required or if a topcoat reapplication is sufficient.

2.2 Fixed Roof Coating

OBSERVATION: External coating for the tank fixed roof exhibits widespread chalking, indicating the coating system is near the end of its life cycle.

REFERENCE: UFC 3-460-01, Section 8-3.10

RECOMMENDATION: Provide a full recoat of the tank fixed roof, approximately 1,300 ft2. Prior to recoat, perform a coating condition survey, or review the previous coating condition survey, to determine if a full recoat is required or if a topcoat reapplication is sufficient.

2.3 Fixed Roof Nozzle and Appurtenance Coatings

OBSERVATION: Coating on IFR inspection hatches, three (3) temperature sensors, manual gauging hatch, Enraf ATG, and two (2) threaded caps exhibit chalking and base metal exposure with surface corrosion.

REFERENCE: UFC 3-460-01, Section 8-3.10

RECOMMENDATION: Provide approximately 60 ft2 of spot coating repair on the fixed roof nozzles and appurtenances.

2.4 Grounding Cable Penetration Sealant

OBSERVATION: Sealant provided at four (4) grounding cable foundation penetrations exhibit voids, shrinkage, and disbondment, allowing a pathway for fluid to escape in the event of a spill.

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

RECOMMENDATION: Provide approximately 4 linear feet of flexible, fuel-resistant, UV-resistant sealant at four (4) grounding cable foundation penetrations. Note: This will be accomplished as part of a recurring maintenance and minor repair (RMMR) service order.

2.5 Tank Seismic and Wind Anchor Bolts

OBSERVATION: Tank seismic and wind anchors are distorted, warped, and may be under excess stress. One (1) anchor bolt is not of adequate length and does not exceed the associated hex nut.

REFERENCE: UFC 3-460-03, Section 8-4.1 (C); API 650, Section 5.12

RECOMMENDATION: Perform a stress analysis on seismic and wind anchors to determine if the anchors are of adequate size, operations, and demographics.

2.6 Manway 1 Weld Spacing

OBSERVATION: Manway 1 reinforcing pad weld spacing at the shell-to-bottom weld is approximately 2 ½-inches.

REFERENCE: API 650, Figure 5.6

RECOMMENDATION: Perform magnetic particle (MT) or dye penetrant (PT) testing at the Manway 1 reinforcing pad. Note: This will be accomplished as part of a RMMR service order.

2.7 Receipt DB&B Valve

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

REFERENCE: AW 78-24-27, Sheet D.12 Detail 3; 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.

2.8 IFR Grounding Cables and Anti-Rotation Cable

OBSERVATION: The IFR grounding cable and anti-rotation cable nozzles are provided with machined holes, allowing water ingress to the tank.

REFERENCE: UFC 3-460-03, Section 2-4.2 (F)

RECOMMENDATION: Plug or seal the IFR grounding cable and anti-rotation cable nozzles to avoid water ingress to the tank.

2.9 Stilling Wells

OBSERVATION: The Vito temperature/water probe is not provided a fully slotted stilling well to allow for proper temperature/water gauging during filling and issuing operations and is located at the perimeter of the tank.

REFERENCE: UFC 3-460-01, Table 8.1 (W)

RECOMMENDATION: Fully slot the stilling well provided for the Vito temperature/water probe and move the probe to the blind flange located adjacent to the center vent. The Vito temperature/water probe should be as close to the center sump as possible for accurate water readings.

3. LONG-TERM RECOMMENDED REPAIRS

Long-term repairs that relate to repair/upgrade of an asset to bring it up to the current standard from the standard at time of construction. Long-term repairs represent items that should be addressed in a timely manner in order to prevent future potential risks to system operators, equipment integrity, or the adjacent environment.

3.1 Enraf ATG

OBSERVATION: Ten (10) fasteners on the Enraf ATG exhibit general corrosion and one (1) fastener is missing.

REFERENCE: BMP

RECOMMENDATION: Replace eleven (11) fasteners at the Enraf ATG with stainless steel fasteners and provide isolation at each fastener.

3.2 Inspection Hatch Confined Space Labeling

OBSERVATION: Confined space labeling at each of the two (2) fixed roof inspection hatches exhibit fading and peeling.

REFERENCE: UFC 3-460-01, Section 2.17 (b)

RECOMMENDATION: Replace confined space labeling at each of the two (2) fixed roof inspection hatches.

3.3 HLA/HHLA/HLCV Float Pilot Clearance

OBSERVATION: Clearance between the HLA/HHLA/HLCV float pilot and spiral staircase railing is

21 ½-inches, which is less than the 26-inch clearance required by OSHA.

REFERENCE: OSHA 1910.25(d)(1)

RECOMMENDATION: Extend the spiral staircase treads or work platform to allow proper clearance for the HHLA.

3.4 NFPA Diamond

OBSERVATION: Tank 1 is not provided with a NFPA emergency responder diamond IAW NFPA

704.

REFERENCE: UFC 3-460-01, Section 2-17 (C)

RECOMMENDATION: Provide NFPA responder diamond for the tank.

3.5 Piping Flow Arrows

OBSERVATION: Flow arrows for the receipt and main suction piping exhibit fading and peeling.

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

RECOMMENDATION: Provide or replace product designation labeling and flow arrows for piping in IAW

MIL-STD-161H.

3.6 Center Vent Screen

OBSERVATION: The center vent screen is not properly attached to the vent, allowing wildlife to enter the tank.

REFERENCE: UFC 3-460-03, Section 8-2

RECOMMENDATION: Secure the vent screen to the center vent.

3.7 Strapping Charts

OBSERVATION: Current strapping charts provided for Tank 1 are in 1/8-inch increments where

UFC mandates strapping charts be in 1/16-inch increments.

REFERENCE: UFC 3-460-01, Section 8-3.13

RECOMMENDATION: Provide the tank with strapping charts in 1/16-inch increments.

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

NOZZLE

SCHEDULE

NOZZLE SIZE NOTES

MW1 36" MANWAY

MW2 36" MANWAY

N1 4" LOW SUCTION

N2 12" MAIN SUCTION

N3 24" x 24" FLUSH CLEAN-OUT

N4 3/4" LLA/LLLA

N5 3/4" LLA/LLLA

N6 2" PST RETURN

N7 2" WATER DRAW-OFF

N8 3/4" HLA/HHLA/HLCV FLOAT PILOT

N9 3/4" HLA/HHLA/HLCV FLOAT PILOT

N10 8" RECEIPT

7'-10"

1-1

GROUNDING

CABLE (TYP. 4)

8'-0"

8'-0"

8'-0"

8'-0"

VAREC

MW1

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

2-1 2-2 2-3 2-42-5

4-5 4-1 4-2 4-34-4

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

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

MW2

N1

N2

N3

N4

N5

N6 N7

N10

N8

N9

ANCHOR (TYP. 20)

0'-2"

CONCRETE PAD

VAREC TLG

SUPPORT (TYP.4)

SPIRAL STAIRCASE

FULL PERIMETER

HAINDRAIL

CONDUIT SUPPORT

(TYP.8)

LEVEL ALARM SUPPORT

(TYP.4)

INSERT PLATE

OVERFLOW VENT

(TYP.2)

VAREC

TLG

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

W A

R N

B

I N

S

G

A

R O

B I N

S

A

N G

T A

K

A C

I L

I T

Y

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

C A

W

A E

C

C R

P

N A

TANK INFORMATION

TANK NO.: TANK 1 (FACILITY 4312)

MANUFACTURER: INDUSTRIAL ALLOY FABRICATORS

YEAR BUILT: 1998

TANK DIAMETER: 36'-8"

TANK HEIGHT: 40'-0"

NOMINAL CAPACITY: 7,077 BBL

PRODUCT: JET-A (F-24)

PRODUCT SPECIFIC GRAVITY: 0.84

GPS COORDINATES: 32.642189°, -83.604161°

N A

S H

E L

L

L

A Y

O U

T

A-1

NOTES:

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

APPENDIX A FOR INDIVIDUAL SHELL PLATE UTT READINGS.

2. REFER TO TABLE 3, "NOZZLE/REPAD UTT MEASUREMENTS",

FOR NOZZLE DATA.

SPIRAL

STAIRCASE

NOZZLE

SCHEDULE

NOZZLE SIZE NOTES

N11 3" IFR ANTI-ROTATION CABLE

N12 12" TEMPERATURE SENSOR

N13 2 1/2" VAREC TLG

N14 36" x 30" IFR INSPECTION HATCH

N15 3" IFR GROUNDING CABLE

N16 12" TEMPERATURE SENSOR

N17 24" CENTER VENT

N18 8" BLIND FLANGE

N19 72" x 24" IFR INSTALLATION HATCH

N20 12" TEMPERATURE SENSOR

N21 3" IFR GROUNDING CABLE

N22 36" x 30" IFR INSPECTION HATCH

N23 10" SAMPLING HATCH

N24 10" ENRAF ATG

N25 4" VITO WATER/TEMPERATURE PROBE

N26 3" IFR ANTI-ROTATION CABLE

N12

N11

N13

N14

N15

N16

N17

N18

N19

N20

N21 N22

N23

N24

N25

N26

PERIMETER HANDRAIL

SUPPORT (TYP.17)

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

W A

R N

B

I N

S

G

A

R O

B I N

S

A

N G

T A

A C

I L

I T

Y

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

C A

W

A E

C

C R

P

N A

TANK INFORMATION

TANK NO.: TANK 1 (FACILITY 4312)

MANUFACTURER: INDUSTRIAL ALLOY FABRICATORS

YEAR BUILT: 1998

TANK DIAMETER: 36'-8"

TANK HEIGHT: 40'-0"

NOMINAL CAPACITY: 7,077 BBL

PRODUCT: JET-A (F-24)

PRODUCT SPECIFIC GRAVITY: 0.84

GPS COORDINATES: 32.642189°, -83.604161°

N A

F I X

D

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

W A

R N

B

I N

S

G

A

R O

B I N

S

A

N G

T A

A C

I L

I T

Y

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

C A

W

A E

C

C R

P

N A

TANK INFORMATION

TANK NO.: TANK 1 (FACILITY 4312)

MANUFACTURER: INDUSTRIAL ALLOY FABRICATORS

YEAR BUILT: 1998

TANK DIAMETER: 36'-8"

TANK HEIGHT: 40'-0"

NOMINAL CAPACITY: 7,077 BBL

PRODUCT: JET-A (F-24)

PRODUCT SPECIFIC GRAVITY: 0.84

GPS COORDINATES: 32.642189°, -83.604161°

N A

LEGEND:

- PLATE DEPRESSION WITH WATER STAINING

NOTES:

1. REFER TO TABLE 2, "FIXED ROOF UTT MEASUREMENTS", IN

APPENDIX A FOR INDIVIDUAL ROOF PLATE UTT READINGS.

2. REFER TO TABLE 3, "NOZZLE/REPAD UTT MEASUREMENTS",

FOR NOZZLE DATA.

TABLE 1 - SHELL UTT MEASUREMENTS

Fixed Roof

Shell Course 5

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

.244 .244 .245

N/A

.243 .247 .245

.245 .247 .244

.241

Avg. .245

Circumferential Weld C5

Shell Course 4

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

.244 .247 .247

.247 .249 .247

.246 .247 .245

.246

Avg. .247

Circumferential Weld C4

Shell Course 3

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

.246 .247 .245

.244 .245 .246

.247 .246 .244

.244

Avg. .245

Circumferential Weld C3

Shell Course 2

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

.241 .248 .247

.246 .245 .245

.247 .246 .245

.247

Avg. .246

Circumferential Weld C2

Shell Course 1

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

.245 .244 .242 .225 .246 .246 .246 .247 .247 .246 .247 .246 .247 .249 .247

.247 .247 .248 .249 .248 .248 .247 .247 .244 .245 .245 .247 .248 .249 .247

.248 .245 .248 .247 .248 .248 .245 .246 .248 .245 .243 .247 .245 .249 .248

Avg. .246 .245 .246 .246 .248

Circumferential Weld C1

Thickness represented in inches.

Average shell course 1: .246”

Average shell course 2: .246”

Average shell course 3: .245”

Average shell course 4: .247”

Average shell course 5: .245”

TABLE 2 – FIXED ROOF UTT MEASUREMENTS

Plate 1 Plate 2 Plate 3 Plate 4 Plate 5

.194 .196 .183 .180 .180 .186 .188 .188 .187 .189

.195 .180 .184 .190 .188

.197 .194 .183 .179 .181 .185 .189 .187 .183 .185

Avg. .195 .181 .183 .188 .186

Plate 6 Plate 7 Plate 8 Plate 9 Plate 10

.246 .246 .244 .241 .243 .244 .246 .244 .188 .195

.246 .244 .242 .245 .197

.249 .247 .243 .244 .242 .244 .246 .247 .189 .194

Avg. .247 .243 .243 .246 .193

Plate 11 Plate 12 Plate 13 Plate 14 Plate 15

.242 .242 .243 .241 .189 .189 .177 .182 .183 .182

.243 .243 .191 .183 .186

.245 .244 .244 .241 .193 .187 .178 .179 .190 .186

Avg. .243 .242 .190 .180 .185

Plate 16 Plate 17 Plate 18 Plate 19 Plate 20

.182 .183 .175 .179 .184 .181 .184 .182 .188 .184

.186 .180 .184 .185 .183

.181 .186 .182 .182 .184 .181 .185 .187 .182 .186

Avg. .184 .180 .183 .185 .185

Plate 21 Plate 22 Plate 23 Plate 24 Plate 25

.184 .182 .183 .183 .191 .178 .184 .184 .180 .178

.180 .183 .184 .184 .178

.184 .184 .180 .181 .185 .187 .184 .184 .180 .180

Avg. .183 .182 .185 .184 .179

Plate 26 Plate 27 Plate 28 Plate 29 Plate 30

.190 .191 .187 .186 .186 .189 .182 .183 .170 .178

.189 .191 .187 .182 .175

.190 .189 .188 .184 .189 .189 .180 .186 .173 .175

Avg. .190 .187 .188 .183 .174

Plate 31 .180 .181 .179 .186 .182 Avg. .182 Thickness represented in inches.

Average fixed roof (3/16-inch nominal): .185”

Average fixed roof (1/4-inch nominal): .244”

TABLE 3 - NOZZLE / REPAD 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" B 78" .245 .298 .295 .290 .298 3'-3 ½" 0'-2 ½" 0'-0" Manway 1

MW2 36" B 78" .255 .290 .298 .293 .297 8'-10" 7'-1" 19'-0" Manway 2

N1 4'' B 12" .240 .315 .322 .316 .306 2'-6" 2'-0" 19'-3" Low Suction

N2 12" B 27" .311 .493 .484 .487 .494 2'-6" 1'-4 ½" 24'-0" Main Suction

N3 24" x 24" D 72" x 36" .307 .362 .358 .355 .365 1'-0" - 33'-6" Flush Clean Out

N4 ¾" - - - .244 .240 .243 .235 3'-9" 3'-8 ½" 44'-0" LLA/LLLA

N5 ¾" - - - .241 .244 .236 .241 2'-6 ½" 2'-6" 44'-0" LLA/LLLA

N6 2" - - - .200 .192 .229 .230 0'-6 ½" 0'-5 ½" 47'-0" PST Return

N7 2" - - - .223 .218 .199 .218 0'-6 ½" 0'-5 ½" 49'-0" Water Draw-Off

N8 ¾" - - - .241 .236 .238 .244 4'-0" 3'-11" 48'-0" HLA/HHLA/HLCV Float Pilot

N9 ¾" - - - .245 .238 .234 .238 2'-0" 1'-11" 48'-0" HLA/HHLA/ HLCV Float Pilot

N10 8" B 20" .256 .480 .516 .490 .488 1'-4" 0'-7 ½" 110'-6" Receipt

N11 3" - - - TH TH TH TH Fixed Roof IFR Anti-Rotation Cable

N12 12" - - - Obst. Obst. Obst. Obst. Fixed Roof Temperature Sensor

N13 2 ½" - - - TH TH TH TH Fixed Roof Varec TLG

N14 36" x 30" F 44" x 38" .141 .142 .142 .141 .141 Fixed Roof IFR Inspection Hatch

N15 3" - - - .193 .215 .202 .208 Fixed Roof IFR Grounding Cable

N16 12" - - - Obst. Obst. Obst. Obst. Fixed Roof Temperature Sensor

N17 24" - - - .315 .314 .315 .310 Fixed Roof Center Vent

N18 8" B 18" .236 .302 .306 .306 .324 Fixed Roof Blind Flange

N19 72" x 24" - - - .242 .251 .307 .240 Fixed Roof IFR Installation Hatch

N20 12'' - - - Obst. Obst. Obst. Obst. Fixed Roof Temperature Sensor

N21 3" - - - .199 .215 .198 .199 Fixed Roof IFR Grounding Cable

N22 36" x 30" F 44" x 38" .141 .141 .133 .127 .125 Fixed Roof IFR Inspection Hatch

N23 10" B 24" .241 .319 .313 .314 .307 Fixed Roof Sampling Hatch

N24 10" B 24" .236 .319 .325 .322 .320 Fixed Roof Enraf ATG

N25 4" - - - .219 .219 .221 .219 Fixed Roof Vito Temperature/Water Probe

N26 3" - - - TH TH TH TH Fixed Roof IFR Anti-Rotation Cable

Thickness measurements are in inches. Obst.: Obstruction due to minimal surface area.

H1 = Centerline of pipe to edge of tank chime TH = Threaded

H2 = Edge of tank or chime to toe weld of reinforcement pad or nozzle Repad shapes:

TABLE 4 – DFT MEASUREMENTS

External Shell Coating Thickness

Average Standard Deviation Number of Readings Minimum Maximum

9.78 2.28 30 4.71 13.62

External Fixed Roof Coating Thickness

Average Standard Deviation Number of Readings Minimum Maximum

12.84 2.43 15 8.48 17.79

Thicknesses are represented in mils.

TABLE 5 – SHELL SETTLEMENT MEASUREMENTS

Point Arc Length

(ft.)

Tank Chime

(ft.)

1 0.00 1.313 2 14.40 1.271 3 31.09 1.260 4 47.78 1.219 5 64.47 1.229 6 81.16 1.240 7 97.85 1.260 8 114.53 1.313

Settlement points were measured clockwise from MW1.

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

API-653 APPENDIX B SHELL SETTLEMENT EVALUATION

(para. B.2.2.4)

Report No Client Inspector Vessel Date

Robins ANG Tank 1 USACE Andrew Morrissette (POND) Tank 1 04/20/2020

Base Elev Max Elev Elev

FT 1.219 1.313 0.094 R^2 = 0.960

IN 14.628 15.756 1.128

API-653 APPENDIX B SHELL SETTLEMENT EVALUATION

Report No.: Robins ANG Tank 1

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

36.667 40 F 14.40 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)) = 0.029

Point Elevation PE Ui Si Results

1 1.313 0 1.313 0.000 0.007 SAT

2 1.271 45 1.299 -0.028 -0.025 SAT

3 1.260 90 1.266 -0.006 0.015 SAT

4 1.219 135 1.233 -0.014 -0.016 SAT

5 1.229 180 1.219 0.010 0.013 SAT

6 1.240 225 1.233 0.007 0.005 SAT

7 1.260 270 1.266 -0.006 -0.016 SAT

8 1.313 315 1.299 0.014 0.017 SAT

SHELL MINIMUM THICKNESS CALCULATIONS

Tank Shell Minimum Thickness and Remaining Life Calculations Date 04/20/2020

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

3791 Robins ANG Tank 1 USACE Tank 1 Andrew Mo 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) 36.67 G 0.84 E 0.85 Fill Height (ft) 37.6

Material Crs H (ft) H (ft) S (psi) tmin (inch) Course 1 A 36 8 37.6 24900 0.138 Course 2 A 36 8 29.6 24900 0.108 Course 3 A 36 8 21.6 27400 0.100 Course 4 A 36 8 13.6 27400 0.100 Course 5 A 36 7.83 5.6 27400 0.100

SHELL REMAINING LIFE CALCULATIONS

Corrosion rates were determined using assumed nominal thicknesses and UTT measurements taken during this inspection.

Tank Shell Minimum Thickness and Remaining Life Calculations Date 04/20/2020

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

3791 Robins ANG Tank 1 USACE Tank 1 Andrew Mo

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

Y = 22 = 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 0.246 0.138 0.108 0.0002 591 66.02 Course 2 0.250 0.246 0.108 0.138 0.0002 758 74.02 Course 3 0.250 0.245 0.100 0.145 0.0002 638 88.25 Course 4 0.250 0.247 0.100 0.147 0.0001 1078 96.84 Course 5 0.250 0.245 0.100 0.145 0.0002 638 104.25

AST ATMOSPHERIC STORAGE TANK FIXED ROOF EVALUATION

MINIMUM THICKNESS, REMAINING LIFE, PRESSURE CALCULATIONS

Date 04/20/2020

File No Report No Client Inspector Tank No Temp(degF)

1871 Robins ANG Tank 1 USACE Andrew Morrissette

(POND)

Tank 1

Where;

Ca = remaining corrosion allowance of the tank component under consideration, in inch (t act - t min).

Cr = corrosion rate of the tank component under consideration, in inch per year (t prev - t act / Y).

oz = unit of measurement, (weight, in ounces, per square inch), (16 oz per pound) psi = unit of measurement, (weight, in pounds, per square inch) RL = estimated remaining life of the tank component under consideration, in year (Ca / Cr).

t act = actual thickness measurement of the tank component under consideration, as recorded at the time of inspection, in inch.

t min = minimum required thickness of tank component, at the design MAWP at the design temperature (200 degF for atm AST's), in inch (greater of psi/wt or 0.090").

t nom = design nominal thickness of tank component under consideration, in inch.

t prev = previous thickness measurement of the tank component under consideration, as recorded at last inspection or nominal thickness if no previous thickness measurements, in inch.

t yn = thickness of the tank component under consideration at the next inspection at twice the calculated corrosion rate, in inch (t act - (2*Cr*Yn).

wt = weight of plate per cubic inch.

wc = unit of measurement, (height, in inch, of water column bearing on 1 Sq.Inch area), (27.7 wc per pound) Y = time span between thickness readings or age of the tank component if tnom is used for tprev, in year.

Yn = estimated time span to next inspection of the tank component under consideration, in year.

ROOF PLATES - REMAINING LIFE

Y t prev (inch) t act (inch) t min (inch) Cr (inch/Yr) Ca (inch) RL

22 0.188 0.185 0.090 0.00014 0.095 697

ROOF MAXIMUM ALLOWABLE INTERNAL PRESSURE

Material Category wt

0.2833

Yn tyn psi oz. wc

0.000 0.000

RELIEF VALVE SETTING EVALUATION

Setting unit

0.00 PSI = 0.000 (psi)

MAX Allowed

0.000 oz

Relief setting is satisfactory

Corrosion rates were determined using assumed nominal thicknesses and UTT measurements taken during this inspection.

The fixed roof is provided with plate nominal thicknesses of 3/16-inch and 1/4-inch. Calculations were conducted on 3/16-inch plates, as they are the limiting factor in the fixed roof remaining life.

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; April 2025

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; April 2035

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. The next OOS API 653 inspection is based on recommendations from the previous OOS inspection report dated March 2015.

d. Interval: Ten (10) years; March 2025

API/OSHA ACCESS STRUCTURE REPORT

API/OSHA Stairway Data

API Required OSHA Required

Handrail Actual (in) Min (in) Max (in) Min (in) Max (in) Pass/Fail

Height: 31 ½ 30 34 30 38 Pass

Width: 36 28 N/A 22 N/A Pass

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 a 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 a 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. N/A

C.1.2 Shells

C.1.2.1 External Visual Inspection a Visually inspect for paint failures, pitting, and corrosion. X b Clean off the bottom angle area and inspect for corrosion and thinning on plate and weld. X c Inspect the bottom-to-foundation seal, if any. X

C.1.2.2 Internal (Floating Roof Tank) a 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.

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.

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

C.1.3 Shell Appurtenances

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

C.1.3.2 Tank Piping Manifolds a Inspect manifold piping, flanges, and valves for leaks. X b Inspect firefighting system components. X c 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. X b Inspect autogauge head for damage. X c Bump the checker on autogauge head for proper movement of tape. X d Identify size and construction material of autogauge tape guide (floating roof tanks). N/A e Ask operator if tape tends to hang up during tank roof movement (floating roof tanks). X f Compare actual product level to the reading on the autogauge (maximum variation is 2 in.). X g On floating roof tanks, when the roof is in the lowest position, check that no more than two 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.

Completed

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

C.1.3.5 Heater (Shell Manway Mounted) a 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 Non-floating. Raise, then lower the swing line with the winch, and check for cable tightness to confirm that swing line lowered properly.

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

C.1.3.9 Swing Lines: Identify Ballast Varying Need a 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…