Attachment J.1 -Tank 964 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 4, 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: 021

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

1. Savannah ANG – Tank 964 – In-Service API 653 Inspection Report (Final)

2. Savannah ANG – Tank 964 Attachment C

Respectfully submitted, Pond

Anthony E, Chinn, EIT

Program Manager | Mechanical Integrity chinna@pondco.com

678-591-5242

CC: Perrie Kreger – perrie.r.kreger.mil@mail.mil

US Army Corps of Engineers Omaha District

API 653 In-Service Inspection Report

Savannah Air National Guard Facility 964

Tank 964

US Army Corps of Engineers Center of Expertise for Petroleum, Oils and Lubricants 3/24/2020

API 653 In-Service Inspection Report Savannah ANG, Georgia

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 653, UFC 3-460-01, OR DoD AW 78-24-27 STANDARDS

2. SHORT-TERM RECOMMENDED REPAIRS

3. LONG-TERM RECOMMENDED REPAIRS

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

NEXT INSPECTION

OSHA ACCESS STRUCTURE REPORT

APPENDIX B: API 653 CHECKLISTS FOR TANK INSPECTIONS

APPENDIX C: PHOTOGRAPHS

ACRONYMS AND ABBREVIATIONS

AFFF Aqueous Film Forming Foam

ANG Air National Guard

API American Petroleum Institute

ATG Automatic Tank Gauge

AW Airlift Wing

BBL Barrel

BMP Best Management Practice

CP Cathodic Protection

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

ICCP Impressed Current Cathodic Protection

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

OSHA Occupational Health and Safety Administration

PRT Product Recovery Tank

PT Dye Penetrant Testing

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 964 at Savannah Air National Guard (ANG) in Savannah, Georgia.

The in-service inspection was performed 23-24 March 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) design standard AW 78-24-27, National

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

Tank 964 is a welded, steel, vertical, aboveground Jet A (F-24) storage tank. The tank was constructed by an unknown manufacturer in 1969. The tank is 35’-0” in diameter and 27’-`0” high with a nominal capacity of 3,698 barrels (BBL)

(155, 316 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: 23-24 March 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 R. Peterson

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: July 2015

API In-Service (External) Inspection Date: July 2015

RECOMMENDED FUTURE INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: July 2025*

API In-Service (External) Inspection Date: March 2025

*Out-of-service (OOS) inspection date based on the previous OOS inspection report dated July 2015.

Andrew D. Morrissette Christopher R. Peterson

Integrity Engineer Integrity Engineer

API 653 Inspector # 80109

ASNT NDT Level I/II

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner Georgia ANG

Location Savannah ANG

Facility Number 964

Tank Number 964

State / Country Georgia, USA

City Savannah

Inspection Date 23-24 March 2020

Tank Manufacturer Unknown

Design Standard Unknown

Date of Construction 1960*

Tank Contents Jet-A (F-24)

Tank Serial Number N/A

Tank Diameter 35’-0”

Shell Height 27’-10”

Product Height 21’-7” *

Tank Capacity 3,698 BBL (155,316 Gallons)

Foundation Concrete Ring Wall

Construction

Bottom: Cone-Down/Lap-Welded/Double Bottom*

Shell: Butt-Welded

Fixed Roof: Lap-Welded

Floating Roof: Aluminum Honeycomb Pan*

Material

Bottom: Carbon Steel (Unknown Grade) *

Shell: Carbon Steel (Unknown Grade)

Fixed Roof: Carbon Steel (Unknown Grade)

Floating Roof: Aluminum Pontoon with Foam Log Seals*

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

Interior Coating System Unknown

Exterior Coating System Epoxy with Polyurethane Topcoat (Assumed)

Level Gauging Cameron Automatic Tank Gauge (ATG) and Shand & Jurs Tape Level Gauge

(TLG)

Overfill Protection High Level Alarm (HLA) / High-High Level Alarm (HHLA) / High-Level Control

Valve (HLCV) Float Pilot Assembly

Piping Receipt 6-inches Carbon Steel

Main Suction 6-inches Carbon Steel

Low Suction 4-inches Carbon Steel

Water Draw-Off 2-inches Carbon Steel

Product Recovery Tank (PRT)

Return 2-inches

Carbon Steel

Level Alarms HLA/HHLA Assembly and Low Level Alarm (LLA) / Low-Low Level Alarm

(LLLA) Assembly

Notes:

*Based on previous OOS inspection report dated July 2015.

A. GENERAL PROJECT INFORMATION

1. API 653 IN-SERVICE (EXTERNAL) INSPECTION

The in-service inspection was performed 23-24 March 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 AW 78-24-27, NFPA 407, and industry standards.

2. SITE INFORMATION

The 165th Airlift Wing (AW) is located at Savannah/Hilton Head International Airport, Georgia. The

165th AW, which currently flies the C-130H cargo aircraft, was created after World War II in 1946. The unit was officially mobilized first for the Korean War and then again for Operation Iraqi Freedom. The

165th provides air transport for airborne forces, their equipment and supplies with delivery by airdrop or airland, and to provide strategic airlift of personnel, equipment and supplies.

B. TANK INSPECTION COMMENTS

1. TANK CONSTRUCTION

Tank 964 is a welded, steel, vertical, aboveground Jet-A (F-24) storage tank. The tank was constructed in

1960 by an unknown manufacturer. The tank is 35’-0” in diameter and 27’-10” high with a nominal capacity of 3,698 BBL (155,316 gallons).

2. TANK FOUNDATION

Tank 964 is provided a double bottom with leak detection ports between the original and secondary tank bottom. Leak detection ports are provided valves left in the normally closed position. The original tank bottom rests on a concrete ring wall foundation. The foundation-to-walkway joint is not provided with sealant.

A settlement evaluation was performed during the inspection. The settlement evaluation was unsatisfactory based on data collected, however, no visual signs of excessive shell stress or settlement were observed. Settlement should be monitored during future inspections.

See Appendix A for settlement results.

3. CATHODIC PROTECTION

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

According to the previous CP survey report dated July 2018, the tank is receiving adequate CP based on

NACE International -850 millivolt polarized potential criteria.

4. TANK SHELL

The tank shell is equipped with four (4) fully coated, butt-welded, steel courses. Shell plates were examined using ultrasonic thickness testing (UTT) and visual testing (VT) methods. Nine (9) UTT measurements were taken on each plate of the 1st shell course. Ten (10) UTT measurements were taken on each of the 2nd through 4th shell courses using the spiral staircase for access. UTT measurements indicated no significant signs of metal loss on shell plates.

Two (2) insert plates on Tank 964 are provided with square corners. Square corners should be avoided as they are potential stress risers. No visual sign of stress cracking was observed at the time of inspection.

Deformations were observed adjacent to insert plates on the upper shell courses. For the deformations on the spiral staircase, none of the deformations were determined to be out of API allowable tolerances.

The sizes and tolerances for the inaccessible deformation were not determined. Each deformation should be monitored in future inspections.

Refer to Drawing A-1 in Appendix A for shell layout and UTT readings at accessible deformations and

Table 1 for tank shell 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. The tank fixed roof is provided a ladder to access the internal floating roof (IFR). Insect nests were observed on the ladder.

Refer to Drawing A-2 in Appendix A for roof layout and Table 2 for fixed roof plate UTT measurements.

6. TANK APPURTENANCES

a. TANK SHELL

The tank shell nozzles were examined using UTT and VT methods. Two (2) to four (4) UTT measurements were taken on each shell nozzle as accessible. Tank 964 is equipped with eighteen (18) shell nozzle penetrations: one (1) 30” manway, one (1) 36” manway, one (1) 6” main suction, one (1) 4” low suction, two (2) threaded plugs, one (1) 6” receipt, two (2) 1”

HLA/HHLA penetrations, one (1) 1” blind flange, three (3) 1 ½” threaded plugs, one (1) 2” water draw off, one (1) 2” PRT return, two (2) 1” LLA / LLLA penetrations, and one (1) aqueous film forming foam (AFFF) chamber.

Refer to Drawing A-1 in Appendix A for shell layout and Table 3 for nozzle UTT measurements.

b. FIXED ROOF

The tank fixed roof nozzles were examined using UTT and VT methods. Four (4) UTT measurements were taken on each roof nozzle. The fixed roof is provided thirteen (13) nozzle penetrations: one (1) 10” sampling hatch, one (1) 36” x 48” inspection hatch, one (1)

10” Cameron ATG, one (1) 30” x 72” IFR installation hatch, one (1) 24” center vent, one (1) 8” stilling well nozzle, two (2) 4” scaffold supports, two (2) 2 ½” IFR grounding cables, two (2)

3” IFR anti rotation cables, and one (1) 1 ½” Shand & Jurs TLG.

Coating for the center vent, Cameron ATG, and stilling well nozzle exhibit corrosion staining and base metal exposure with surface corrosion. Insect nests were observed on the ladder to access the IFR.

Refer to Drawing A-2 in Appendix A for roof layout and Table 3 in Appendix A.

c. GAUGING

The tank is provided with a manual gauging hatch on the roof manway for manual gauging and sampling operations. A Cameron ATG system is provided for automatic tank gauging.

According to base personal, the ATG is functioning properly, however DLA ATG Installation

Policy requires that Tank 964 be equipped with an Enraf ATG and Vito temperature/water probe. A mechanical Shand & Jurs TLG is provided for monitoring product level from the ground. The TLG did not pass the field operability check. The gauge was pulled but did not adjust after being returned to the normal position, indicating the float is not resting on the product stored inside the tank.

d. LEVEL ALARMS

The tank is provided with independent, shell mounted alarms in the low, low-low, high, and high-high positions as well as a HLCV float pilot 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. Stair treads were extended at the HLA/HHLA/HLCV float pilot assembly to allow safe passage. An internal access ladder is provided at the roof inspection hatch for access to the IFR.

f. GROUNDING AND BONDING

The tank shell is equipped with five (5) grounding cables. Grounding cables are in good condition with no signs of damage or deterioration.

7. TANK AND PIPING COATING

Coating for the receipt, main suction, low suction, water draw-off, and PRT return exhibits widespread flaking, cracking, bio-growth, and base metal exposure with surface corrosion. A full recoat of the piping system should be programmed in the near future. Coating for the tank shell exhibits bio-growth and debris build-up. Coating for the stilling well nozzle, Cameron ATG, and fixed roof center vent exhibit corrosion staining and base metal exposure. The tank shell and piping exhibit widespread bio-growth.

8. TANK PIPING SYSTEM

Piping within the containment dike is constructed of carbon steel. Product designation labeling and flow arrows for the receipt and suction piping exhibit fading and peeling. One (1) pipe support for each of the receipt and main suction are not provided with lateral restraints.

9. FIRE PROTECTION SYSTEM

For internal fire protection, an aluminum honeycomb pan is provided. The tank is also equipped with an

AFFF system. The AFFF system is no longer needed and should be removed upon approval from base civil engineering.

10. SECONDARY CONTAINMENT

Tank 964 is located within a gravel covered geotextile liner dike with four (4) concrete sloped walls. A concrete walkway is provided around the tank perimeter. Control joints for the walkway and dike walls are not provided sealant. The containment dike exhibits widespread vegetation growth and the geotextile liner exhibits tearing and fraying.

C. FINDINGS AND RECOMMENDATIONS

Based on the in-service API 653 inspection of Tank 964 located at Savannah ANG in Savannah, Georgia, repair/upgrade recommendations have been identified. The following recommendations outline observations from this inspection. All repair recommendations are based on applicable sections of API

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

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

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

No mandatory repairs are required to remove Tank 964 from service.

2. SHORT-TERM RECOMMENDED REPAIRS

Short-term repairs that directly relate to the long-term preservation of the asset. Short-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. These items may be required by federal, state and local codes or by military criteria.

2.1 Fixed Roof Nozzles Coating

OBSERVATION: Coating on the stilling well nozzle, Cameron ATG, and fixed roof center vent exhibit corrosion staining and base metal exposure.

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

RECOMMENDATION: Provide approximately 20 ft2 of spot coating repair on the stilling well nozzle, Cameron ATG flange, and fixed roof center vent.

2.2 Tank Shell Nozzles and Appurtenances Coating

OBSERVATION: External coating on the main suction, low suction, water draw-off, PRT return, and receipt nozzles and piping exhibit corrosion staining, flaking, and base metal exposure with surface corrosion.

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

RECOMMENDATION: Provide approximately 75 ft2 of spot coating repair on tank shell nozzles, appurtenances, and piping.

2.3 Foundation-to-Walkway Joint

OBSERVATION: The foundation-to-walkway joint is not provided with sealant, allowing a pathway for fluid to escape in the event of a spill.

REFERENCE: UFC 3-460-03, Section 8-4.1 (b)

RECOMMENDATION: Provide approximately 115 linear feet of flexible, fuel-resistant, UV-resistant sealant at the foundation-to-walkway joint.

2.4 Pipe Supports

OBSERVATION: Two (2) pipe supports, one (1) for each of the main suction and receipt, are not provided with lateral restraints.

REFERENCE: AW 78-24-27, Sheet CD.13, Pipe Support Detail Type GS: Guided Support

RECOMMENDATION: Provide lateral restraints for two (2) pipe supports for the main suction and receipt.

2.5 Shand & Jurs TLG

OBSERVATION: The Shand & Jurs TLG did not pass the field operability test.

REFERENCE: UFC 3-460-03, Section 8-9.7

RECOMMENDATION: Repair or replace the Shand & Jurs TLG.

2.6 Tank Shell Insert Plates

OBSERVATION: The tank shell is provided with two (2) insert plates with square corners. Square corners should be avoided as they are potential stress risers.

REFERENCE: API 653 Section 9.2.2.1

RECOMMENDATION: Perform magnetic particle testing (MT) or dye penetrant testing (PT) at two (2) square-cornered insert plates on the fourth shell course.

2.7 Secondary Containment Control Joints

OBSERVATION: Walkway and dike sloped wall control joints are not provided with sealant.

REFERENCE: UFC 3-460-03, Section 8.10.2.2 (c); UFC 3-460-03, Section 8.10.2.1 (d)

RECOMMENDATION: Provide approximately 600 linear feet of flexible, fuel-resistant, UV-resistant sealant at walkway and sloped wall control joints.

2.8 Secondary Containment Cracking

OBSERVATION: Cracking was observed in the containment sloped walls. Cracking is not provided sealant.

REFERENCE: UFC 3-460-03, Section 8-10.2.1(c)

RECOMMENDATION: Provide approximately 50 linear feet of sealant to unsealed cracks.

2.9 ATG

OBSERVATION: Tank 964 is provided with a Cameron ATG.

REFERENCE: DLA ATG Installation Policy

RECOMMENDATION: Provide the tank with an Enraf ATG and Vito temperature/water probe.

3. LONG-TERM RECOMMENDED REPAIRS

Long-term repairs that directly 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 IFR Inspection Hatch Ladder

OBSERVATION: Insect nests were observed on the IFR inspection hatch ladder.

REFERENCE: BMP

RECOMMENDATION: Remove the insect nests on the IFR inspection hatch ladder.

3.2 Tank Shell Coating

OBSERVATION: Tank shell, nozzles, and appurtenances coatings exhibit bio-growth and debris build-up.

REFERENCE: BMP

RECOMMENDATION: Pressure wash bio-growth and debris on the shell, nozzles, and appurtenances coatings.

3.3 AFFF

OBSERVATION: Tank 964 is provided with an AFFF system, however, an IFR is provided for fire protection.

REFERENCE: UFC 3-460-01, Section 2-14.2.2

RECOMMENDATION: Remove the AFFF discharge chamber and associated piping upon approval from base civil engineering. If approval is not granted, coat piping red in accordance with MIL-STD-161H. Note that AFFF piping is constructed of galvanized steel and provided threaded connections.

3.4 Secondary Containment Geotextile Liner

OBSERVATION: The secondary containment geotextile liner exhibits tearing, fraying, and widespread vegetation growth.

REFERENCE: BMP

RECOMMENDATION: Repair approximately 50 square feet of tearing and fraying of the geotextile liner and remove vegetation growth from the secondary containment.

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

NOZZLE

SCHEDULE

NOZZLE SIZE SHELL LAYOUT

MW1 30" MANWAY

N1 6" MAIN SUCTION

N2 4" LOW SUCTION

N3 - THREADED PLUG

N4 - THREADED PLUG

N5 6" RECEIPT

N6 1" HLA/HHLA

N7 1" BLIND FLANGE

N8 1" HLA/HHLA

N9 1 1/2" THREADED PLUG

N10 1 1/2" THREADED PLUG

N11 1 1/2" THREADED PLUG

N12 2" WATER DRAW OFF

N13 2" PRT RETURN

N14 1" LLA/LLLA

N15 1" LLA/LLLA

MW2 36" MANWAY

N16 - AFFF

5'-10"

8'-0"

6'-0"

8'-0"

LEAK DETECTION

PORT (TYP. 5)

GROUNDING

CABLE (TYP. 6)

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

2-1 2-42-32-2

3-1 3-2 3-33-4

4-14-4

4-2 4-3

N1

N2

N3

N4

N5

AFFF PIPE

SUPPORT (TYP. 4)

N16

N14

N15

N10

N11

N9

N13N12

N8

N6

N7

SHEET OVERFLOW

VENT (TYP. 2)

ATG SUPPORT

(TYP. 3)

CONDUIT SUPPORT

(TYP. 9)

.247"

.249"

.252"

.250"

.248"

.249"

.248"

.250"

.240"

.241"

.237"

.229"

.235"

.242"

.245"

.179"

.129" - .177"

PERIMETER HANDRAIL

SPIRAL

STAIRCASE

STAIRCASE

UPPER

PLATFORM

HLA/HHLA

CHAMBER

SUPPORT (TYP. 6)

LLA/LLLA

CHAMBER

SUPPORT (TYP. 2)

TANK BOTTOM

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

S A

V A

N N

A H

G

A

S A

V A

N N

H

G

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 a r k w a y

L a n e

S u i t e

P e a c h t r e e

C o r n e r s

G

A

P h o n e

F a x

J O

B

N

O

A D

M

A E

C

C R

P

N A

TANK INFORMATION

TANK NO.: TANK 964

MANUFACTURER: UNKNOWN

YEAR BUILT: 1960

TANK DIAMETER: 35'-0"

TANK HEIGHT: 27'-10"

NOMINAL CAPACITY: 4,788 BBL

PRODUCT: JET-A

PRODUCT SPECIFIC GRAVITY: 0.82

GPS COORDINATES: 32.11332°, -81.1892°

N A

S H

E L L

L A

Y O

U T

A-1

LEGEND:

SHELL DEFORMATION

UTT READINGXXX"

NOTES:

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

APPENDIX A FOR INDIVIDUAL SHELL PLATE UTT

READINGS.

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

IN APPENDIX A FOR INDIVIDUAL ROOF PLATE UTT

READINGS.

3. REFER TO TABLE 3, "SHELL NOZZLE/REPAD UTT

MEASUREMENTS", FOR NOZZLE DATA.

SPIRAL

STAIRCASE

NOZZLE

SCHEDULE

NOZZLE SIZE FIXED ROOF LAYOUT

N17 10" SAMPLING HATCH

N18 36" x 48" INSPECTION HATCH

N19 10" CAMERON ATG

N20 30" x 72" IFR INSTALLATION HATCH

N21 24" CENTER VENT

N22 8" STILLING WELL

N23 4" SCAFFOLD SUPPORT

N24 2 1/2" IFR GROUNDING CABLE

N25 3" IFR ANTI-ROTATION CABLE

N26 3" IFR ANTI-ROTATION CABLE

N27 4" SCAFFOLD SUPPORT

N28 2 1/2" IFR GROUNDING CABLE

N29 1 1/2" SHAND & JURS TLG

N21

N18

PERIMETER ROOF

VENT (TYP. 4)

PERIMETER HAND RAIL

SUPPORT (TYP. 14)

N17

N19

N20

N22

N23

N24

N25

N26

N27

N28

N29

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

S A

V A

N N

A H

G

A

S A

V A

N N

G

T A

L A

Y O

U T

N T

S

N A

W F

D

W F

F

A N

S I

B r k w a y

L a n e

S u i

P e a c h t r e e

C o r n e r s

G

A

P h o n e

F a x

J O

B

N

O

A D

M

A E

C

C R

P

N A

TANK INFORMATION

TANK NO.: TANK 964

MANUFACTURER: UNKNOWN

YEAR BUILT: 1960

TANK DIAMETER: 35'-0"

TANK HEIGHT: 27'-10"

NOMINAL CAPACITY: 4,788 BBL

PRODUCT: JET-A

PRODUCT SPECIFIC GRAVITY: 0.82

GPS COORDINATES: 32.11332°, -81.1892°

N A

F I X

D

O

F

L A

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A-2

C O

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R A

F I

M

E

D W

N

B

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C K

D

B

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D E

S I G

N E

D

B

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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

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S I Z

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C A

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M A

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R I P

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D E

L I V

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SHEET

IDENTIFICATION

D A

T E

A P

P R

SHEET OF

U S

A

R M

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I N

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A H

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V A

N N

A H

G

A

S A

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N N

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T A

L A

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N T

S

N A

W F

D

W F

F

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S I

B r k w a y

L a n e

S u i

P e a c h t r e e

C o r n e r s

G

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A D

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N A

TANK INFORMATION

TANK NO.: TANK 964

MANUFACTURER: UNKNOWN

YEAR BUILT: 1960

TANK DIAMETER: 35'-0"

TANK HEIGHT: 27'-10"

NOMINAL CAPACITY: 4,788 BBL

PRODUCT: JET-A

PRODUCT SPECIFIC GRAVITY: 0.82

GPS COORDINATES: 32.11332°, -81.1892°

N A

NOTES:

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

IN APPENDIX A FOR INDIVIDUAL ROOF PLATE UTT

READINGS.

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

MEASUREMENTS", FOR NOZZLE DATA.

API-653 APPENDIX B SHELL SETTLEMENT EVALUATION

(para. B.2.2.4)

Report No Client Inspector Vessel Date Savannah ANG

Tank 964 USACE Andrew Morrissette (POND) Tank 964 04/13/2020

Base Elev Max Elev Elev

FT 1.833 2.021 0.187 R^2 = 0.901

IN 22.000 24.250 2.250

PetersonC Text Box The settlement evaluation criteria per API 653 paragraph B.2.2.4 is not satisfied at multiple points due to the maximum out-of-plane deflection being greater than the allowable out-of-plane deflection. As an alternative, the evaluation provided in API 653 paragraph B.2.2.5 was used in determining shell settlement. See next page.

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

Savannah ANG Tank 964 USACE Andrew Morrissette

(POND) Tank 964 4/13/2020

Base Elev Max Elev Elev

FT 1.833 2.021 0.187

IN 22.000 24.250 2.250

Report No.: Savannah ANG Tank 964

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

35 27.8 F Unknown 30000 29000000 10.500

Where:

D = Tank Diameter, in ft H = Tank Height, in ft Roof Type: F = fixed, O = Open Y = Yield strength of shell 1st course , in pounds per Sq.Inch (psi) E - Young's modulus, in pounds per Sq.Inch (psi) K = factor from table in B.3.2.2 (API-653 App. B) PE2 = Predicted elevation (for secondary evaluation), in ft Sarc = the effective settlement arc length, see B.2.2.5.1, in ft Si = out-of-plane settlement, in inch Smax = Maximum allowed out-of-plane settlement, in inch (min(K*Sarc*(D/H)*(Y/E), 4.0)

Point Elevation PE2 Sarc Si Smax Results

1 1.833 0 1.896 55 0.750 0.751 SAT

2 1.854 45 1.854 27.5 0.000 0.376 SAT

3 1.844 90 1.906 27.5 0.750 0.376 UNSAT

4 1.958 135 1.958 27.5 0.000 0.376 SAT

5 1.927 180 1.990 27.5 0.750 0.376 UNSAT

6 2.021 225 2.021 55 0.000 0.751 SAT

7 1.927 270 1.979 55 0.625 0.751 SAT

8 1.917 315 1.938 55 0.250 0.751 SAT

PetersonC Text Box The maximum measure out-of-plane deflection is .75 inches and maximum allowable deflection is 0.376 inches; therefore, the tank is not within API 653 acceptable limits. The allowable deflection of the tank is not accurately represented by the above analysis due to the small size of the tank which results in a small arc length. No visual settlement was identified during the inspection. It is recommended to monitor the tank settlement during future inspections.

SHELL MINIMUM THICKNESS CALCULATIONS

Tank Shell Minimum Thickness and Remaining Life Calculations Date 04/13/2020

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

3775 Savannah ANG Tank

USACE Tank 964 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) 35 G 0.82 E 0.85 Fill Height (ft) 27.8

Material Crs H (ft) H (ft) S (psi) tmin (inch) Course 1 Unknown 6 27.8 23600 0.100 Course 2 Unknown 8 21.8 23600 0.100 Course 3 Unknown 8 13.8 26000 0.100 Course 4 Unknown 5.83 5.8 26000 0.100

SHELL REMAINING LIFE CALCULATIONS

Tprev thicknesses were not included in the previous inspection report dated July 2015. Nominal plate thicknesses were used for Tprev.

Tank Shell Minimum Thickness and Remaining Life Calculations Date 04/13/2020

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

3775 Savannah ANG Tank

USACE Tank 964 Andrew Mo

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

Y = 5 = 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 0.240 0.100 0.140 0.0020 70 65.52 Course 2 0.250 0.238 0.100 0.138 0.0024 58 70.98 Course 3 0.250 0.234 0.100 0.134 0.0032 42 84.30 Course 4 0.187 0.182 0.100 0.082 0.0010 82 76.90

AST ATMOSPHERIC STORAGE TANK FIXED ROOF EVALUATION

MINIMUM THICKNESS, REMAINING LIFE, PRESSURE CALCULATIONS

Date 04/13/2020

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

Savannah ANG Tank

USACE

Andrew Morrissette

(POND)

Tank 964

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

2015 0.187 0.189 0.090 0.00000 0.099 >20

PetersonC Snapshot

TABLE 1 - SHELL UTT MEASUREMENTS

Fixed Roof

Shell

Course

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

.179 .188 .181

.179 .184 .183

.186 .179 .181

.177

Avg. .182

Circumferential Weld C4

Shell

Course

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

.232 .236 .234

.232 .237 .237

.232 .237 .232

.237

Avg. .234

Circumferential Weld C3

Shell

Course

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

.237 .239 .237

.240 .240 .235

.241 .237 .237

.233

Avg. .238

Circumferential Weld C2

Shell

Course

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

.242 .244 .239 .233 .235 .231 .241 .238 .237 .237 .239 .243

.245 .245 .242 .236 .236 .234 .242 .240 .239 .240 .241 .245

.244 .246 .243 .236 .238 .235 .242 .240 .241 .240 .242 .244

Avg. .243 .235 .240 .241

Circumferential Weld C1

Thickness Represented in inches.

Average Shell Course 1 .240 Average Shell Course 2 .238 Average Shell Course 3 .234 Average Shell Course 4 .182 Refer to Drawing A-1 in Appendix for plate numbers.

TABLE 2 – FIXED ROOF UTT MEASUREMENTS

Plate 1 Plate 2 Plate 3 Plate 4 Plate 5

.189 .188 .188 .188 .188 .190 .189 .188 .190 .190

.189 .189 .190 .188 .189

.190 .188 .187 .189 .189 .189 .186 .188 .189 .189

Avg. .189 .188 .189 .188 .189

Plate 6 Plate 7 Plate 8 Plate 9 Plate 10

.191 .189 .190 .189 .193 .191 .190 .191 .190 .189

.189 .191 .192 .192 .190

.188 .189 .185 .191 .192 .190 .190 .190 .189 .189

Avg. .189 .189 .192 .191 .189

Plate 11 Plate 12 .189 .188 .189 .186 .190 .188 .190 .190 .190 .186

Avg. .189 .188 Thickness Represented in inches.

Average Roof Thickness .189

Refer to Drawing A-2 in Appendix for plate numbers.

TABLE 3 - SHELL NOZZLE / REPAD UTT MEASUREMENT

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 30" B 68" .254 .362 .362 .363 .361 3'-0" 2'-0" 0'-0" Manway

N1 6" B 18” .251 .421 .410 .404 .421 0'-11 ½” 0'-8 ½” 9'-1" Main Suction

N2 4" B 10” .372 .319 .338 .330 .313 1'-0" 0'-9 ½” 14'-2" Low Suction

N3 - - - - TH TH TH TH - - 16'-3" Threaded Plug

N4 - - - - TH TH TH TH - - 16'-3" Threaded Plug

N5 6" B 18” .254 .425 .410 .408 .413 0'-9" 0'-3" 16'-6" Receipt

N6 1" - - - .252 - .252 - 25'-0" 24'-11 ½” 43'-11" HLA/HHLA

N7 1" - - - .238 - .234 - 25'-6" 25'-5 ½” 48'-2" Blind Flange

N8 1" - - - .236 - .239 - 23'-9 ¾” 23'-9 ¼” 48'-2" HLA/HHLA

N9 1 ½” - - - TH TH TH TH 24'-5 ¾” 24'-5" 49'-0" Threaded Plug

N10 1 ½” - - - TH TH TH TH 24'-5 ¾” 24'-5" 53'-11" Threaded Plug

N11 1 ½” - - - TH TH TH TH 22'-6 ¼” 22'-5 ½” 53'-11" Threaded Plug

N12 2" - - - .209 - .215 - 0'-6 ½” 0'-5 ½” 54'-4" Water Draw-off

N13 2" - - - .218 - .214 - 0'-6 ½” 0'-5 ½” 56'-4" PRT Return

N14 1" - - - .247 - .241 - 4'- ½” 4'-0" 61'-8" LLA/LLLA

N15 1" - - - .237 - .236 - 31'-0" 30'- ½” 61'-8" LLA/LLLA

MW2 36" B 73" '' .364 .367 .363 .362 3'-6" 1’-11 ½” 66'-6" Manway

N16 - - - - - - - - - - 72'-3" AFFF

N17 10" B 23" .240 .331 .324 .328 .324 Fixed Roof Sampling Hatch

N18 36" x 48" F 56" x 71" .241/.155 .240 .241 .238 .241 Fixed Roof Inspection Hatch

N19 10" B 23" .239 .314 .320 .318 .320 Fixed Roof Cameron ATG

N20 30" x 72" - - - .385 .377 .373 .378 Fixed Roof IFR Installation Hatch

N21 24" B 55" .243 .247 .248 .246 .244 Fixed Roof Center Vent

N22 8" B 18" .235 .313 .314 .312 .314 Fixed Roof Stilling Well

N23 4" B 9" .363 .229 .235 .236 .242 Fixed Roof Scaffold Support

N24 2 ½” - - - TH TH TH TH Fixed Roof IFR Grounding Cable

N25 3" - - - TH TH TH TH Fixed Roof IFR Anti-Rotation Cable

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

N27 4" B 9" .364 .230 .231 .229 .226 Fixed Roof Scaffold Support

N28 2 ½” - - - TH TH TH TH Fixed Roof IFR Grounding Cable

N29 1 ½” - - - TH TH TH TH Fixed Roof Shand & Jurs TLG

Thickness measurements are in inches.

H1 = Centerline of pipe to edge of tank chime.

H2 = Edge of tank or chime to closest reinforcement pad edge.

TH = Threaded nozzle

Repad Shapes:

TABLE 4 – SHELL AND FIXED DFT MEASUREMENTS

External Shell Coating Thickness

Average Standard Deviation Number of Readings Minimum Maximum

11.84 2.658 20 7.35 16.38

Fixed Roof Coating Thickness

Average Standard Deviation Number of Readings Minimum Maximum

12.81 4.049 15 7.74 24

Thicknesses are represented in mils.

TABLE 5 - SHELL SETTLEMENT MEASUREMENTS

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

1 0.00 1.833

2 13.74 1.854

3 27.49 1.844

4 41.23 1.958

5 54.98 1.927

6 68.72 2.021

7 82.47 1.927

8 96.21 1.917

Settlement points were measured clockwise from MW1.

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

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 internal inspection report dated July 2015 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; March 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 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 out-of-service

API 653 inspection is based on recommendations made in the report dated July 2015 for tank 964.

d. Interval: July 2025

OSHA ACCESS STRUCTURE REPORT

OSHA Stairway Data

OSHA Required

Handrail Actual (in) Min (in)

Max (in)

Pass/Fail

Height: 30 30 38 Pass

Width: 31 ½” 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

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. X

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. 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. 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.)

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.

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. N/A 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. N/A d Where sample hatch is used to reel gauge stock level, check for marker and tab stating hold-off distance.

e Check for reinforcing pad where sample hatch pipe penetrates the roof deck. N/A

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).

N/A

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…