Attachment J - Barksdale-Fac 5921 (Tank 1) Final 2019.pdf

A

US Army Co

US A

API 653

T rps of Engine

Army Co Oma

In‐Servi

Barksd Tank #1 ( eers Center of

(USA

orps of E ha Distr ice Inspe dale AFB (Facility f Expertise fo

ACE POL‐MCX

1/14/2019

Engineer rict ection R

B, LA

y 5921) or Petroleum, X) rs

Report

, Oils, and Lu ubricants

Table of Contents

ACRONYMS AND ABBREVIATIONS

GENERAL SUMMARY

INSPECTION INFORMATION

EQUIPMENT USED

STATE REGULATIONS

PREVIOUS INSPECTION DATES

RECOMMENDED FUTURE INSPECTION DATES

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection

2. Site Information

B. TANK INSPECTION COMMENTS

1. Secondary Containment

2. Tank Construction

3. Tank Foundation

4. Tank Bottom

5. Tank Shell

6. Tank Floating Roof

7. Tank Fixed Roof

8. Tank Appurtenances

9. Tank Piping System

10. Fire Protection System

C. FINDINGS AND RECOMMENDATIONS

1. Mandatory

2. Short Term

3. Long Term

APPENDIX A: ENGINEERING CALCULATIONS

APPENDIX B: ENGINEERING DRAWINGS

APPENDIX C: ENGINEERING DATA

APPENDIX D: API-653 INSPECTION CHECKLIST

APPENDIX E: PHOTOGRAPHS

ACRONYMS AND ABBREVIATIONS

API American Petroleum Institute

ASME American Society of Mechanical Engineers

ASNT American Society of Non-Destructive Testing

ATG Automatic Tank Gauge

BBL Barrel

CFR Code of Federal Regulations

CP Cathodic Protection

DFT Dry Film Thickness

HLA High Level Alarm

HLCS High Level Control Shutoff

HHLA High-High Level Alarm

LLA Low Level Alarm

LLLA Low-Low Level Alarm

MFL Magnetic Flux Leakage

MT Magnetic Particle Testing

NACE National Association of Corrosion Engineers

NDT Non-Destructive Testing

NFPA National Fire Protection Association

PSI Pounds per Square Inch

PT Penetrant Testing

P/V Pressure/Vacuum

RP Recommended Practice

PST Product Saver Tank

RT Radiography Testing

TML Thickness Measurement Location

TRV Thermal Relief Valve

UFC Unified Facilities Criteria

UFGS Unified Facilities Guide Specifications

ULS Ultra Low Sulfur

UT Ultrasonic Testing

VT Visual Testing

GENERAL SUMMARY

An API‐653 in‐service inspection of Tank 1 (Facility 5921), located at Barksdale Air Force Base was completed on January 14, 2019 to evaluate the tank’s integrity, collect data, and establish a database for future inspections and evaluations. A service life evaluation performed on the tank shows it as having greater than 30 years of remaining shell life under current conditions.

Significant Findings (overview):

Mandatory:

1. No mandatory findings noted.

Short Term:

1. A minor fuel weep was noted at the threaded outlet tubing for the CLA‐VAL control valve on the 8‐ inch receipt line.

2. Shell Courses 2‐7, including the wind girder, have completely deteriorated coating.

3. The drip pattern on the IFR indicates leaking panels on the geodesic dome roof.

4. The primary and secondary wiper seals on the IFR have completely deteriorated.

5. An off‐center bracket used for bolting down the secondary seal is causing coating failure on the shell during the movement of the IFR.

Long Term:

1. The circumferential stairway treads and supports are welded directly to the shell without reinforcement pads.

2. Six (6) tubing supports for the control valve tubing and high level alarm drain tubing are welded directly to the shell without reinforcement pads.

3. Nine (9) grounding cables are bolted to carbon steel lugs on the tank shell. The lugs are welded to the shell without reinforcement pads.

4. The circumferential stairway is not equipped with a separate ground cable for static discharge.

5. The tank does not have an upper shell manhole located above the internal floating pan’s high leg position.

6. The tank does not have the tank number posted. The facility number, however, is posted.

7. The confined space placard sticker on the IFR access hatch is faded.

8. The original manufacturer’s data plate has been painted over and is not legible. There is a repair data plate provided by CAPE, Inc. in 2014.

9. The tank does not have a mechanical tape gauge (MTG). Five supports for the previous MTG piping are welded directly to the shell without reinforcement pads.

10. The VITO water/temperature probe is located along the perimeter and not over the center sump.

11. The 12‐inch issue line is not equipped with a fuel sampling connection.

12. Minor to moderate coating failure exists on the low suction line, AFFF line, 8‐inch receipt, high level alarm float flange, and water draw‐off DBBV. Major coating failure exists on the AFFF piping routed along the top of the tank.

13. Mildew/algae staining exists on the underside of the 8‐inch receipt and 8‐inch issue piping.

14. The 8‐inch issue line has no means of thermal relief. The DBBV body cavity relief relieves to the atmosphere.

15. The wind girder located on Course seven (7) has 20 supports welded directly to the shell without reinforcement.

16. The 2‐inch water draw‐off line does not have means of thermal relief installed.

17. The product saver tank is not grounded at the leg.

18. The 4‐inch low suction line is not equipped with a DBBV as the tank skin valve. The line has no means of thermal relief.

19. The IFR does not have a dedicated device for anti‐rotation.

20. The IFR ladder/manual gauge well combo is constructed of carbon steel and not slotted.

21. The high level alarms/shut‐off piping consists of threaded fittings.

INSPECTION INFORMATION

Inspection Date: January 14, 2019

Inspection(s) Performed: API‐653 In‐Service

Inspector(s): Daniel C. Bailey

EQUIPMENT USED

1. Equipment Type: Ultrasonic Thickness Meter

a. Manufacturer: General Electric

b. Model Number: DMS GO+

c. Calibration Method: Two Point Calibration

STATE REGULATIONS

API-653 In-Service Tank Inspections: N/A API-653 Out-of-Service Tank Inspections: N/A

NOTE: If there are no state regulations for tank inspections, N/A shall reside in‐place of the number of years between inspections. If state regulations reside, the recommended future inspections dates shall be based on whichever is more stringent between the API inspector’s calculations and the state regulations.

PREVIOUS INSPECTION DATES

API Out‐of‐Service (Internal) Inspection Date: June 2006

API In‐Service (External) Inspection Date: June 2006

RECOMMENDED FUTURE INSPECTION DATES

API Out‐of‐Service (Internal) Inspection Date: June 2026

API In‐Service (External) Inspection Date: January 2024

Signature(s):

Daniel C. Bailey, API-653 #56207; API-570 #62569; API-510# 74006 InterSpec, LLC.

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner US Air Force

Location Barksdale AFB

Facility Number 5921

Tank Number 1

State / Country Louisiana, United States

City Bossier City

Inspection Date January 14, 2019

Tank Manufacturer Original: Unknown / Modified: CAPE, Inc.

Design Standard API Standard 12C

Date of Construction Original: 1994 New Bottom: 1986 Additional Modifications: 2014

Tank Contents Jet A

Tank Serial Number N/A

Tank Diameter 67’

Shell Height 46’ 1”

Product Height 42’

Tank Capacity 23,800 barrels

Foundation Concrete Ringwall

Construction

Bottom Lap‐Welded

Shell Butt‐Welded

Floating Roof Lap‐Welded

Fixed Roof Lap‐Welded

Material

Bottom Carbon Steel, Unknown Grade

Shell Carbon Steel, Unknown Grade

Floating Roof Carbon Steel, Unknown Grade

Fixed Roof Aluminum, Unknown Grade

Cathodic Protection Impressed Current

Interior Coating System Thin Film Epoxy

Exterior Coating System Thin Film Epoxy

Level Gauging Manual Gauge, ENRAF ATG, VITO Water, & Temp Probe

Overfill Protection CLA‐VAL Hydraulic Control Valve

Piping

Receipt 8" Carbon Steel

Issue / Type 3 Issue 8"/12” Carbon Steel

Low Suction 4” Carbon Steel

Water Draw‐Off 1" Carbon Steel

Level Alarms & Controls

Description ENRAF ATG Independent

High‐High Level Alarm: 41’ 6” 42’5

High‐Level Alarm: 40’ 6” 41’ 5”

Low‐Level Alarm: 5’ 3’ 10”

Low‐Low Level Alarm: 4’ 3’ 4”

High‐Level Control Shut‐off: 42’ 1”

Type of Floating Roof Carbon Steel Double Deck

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection This project will perform API 653 inspections of various tanks at facilities throughout the United States. Additional consideration is given to federal, state, and local regulations as well as applicable military criteria and general industry standards.

An API Standard 653 In‐Service inspection was performed for Tank #1 (Facility 5921).

2. Site Information On January 14, 2019 Argus Consulting and our sub‐consultant (InterSpec, LLC) performed an API 653 In‐Service inspection of Tank 1 (Facility 5921), located at Barksdale AFB, LA.

B. TANK INSPECTION COMMENTS

1. Secondary Containment 40 CFR 112.7(c) states that the entire secondary containment system, “including walls and floor, must be capable of containing oil and must be constructed so that any discharge from a primary containment system ... will not escape containment before cleanup occurs.” 40 CFR 112.8(c)(2) and 40 CFR 112.12(c)(2) state that diked areas must be “sufficiently impervious to contain oil.” The purpose of the secondary containment requirement is to prevent discharges, as described in 40 CFR 112.1(b); therefore, effective secondary containment methods must be able to contain oil until the oil is cleaned up. The secondary containment area consists of an HDPE floor liner covered in gravel and concrete vertical sloped walls. An informal containment evaluation was conducted. The containment appears to be of sufficient size to contain a total tank loss per UFC 3‐460‐01 Section 8‐14.2.1, “The containment area needs to have sufficient capacity to contain the tank contents plus one foot of freeboard. If the containment has the capacity to contain the tank contents plus one foot of freeboard, the containment area is sufficient.” The secondary containment area appears to be properly graded to drain water away from the tank in accordance with NFPA 30.

2. Tank Construction Tank 1 (Facility 5921) is a nominal 23,800 barrel, 67’ diameter by 42’ 1” tall, Jet A, aboveground vertical storage tank. The original construction and upgraded nameplates were affixed to the tank, although the original nameplate is not legible due to being painted over. The tank had a new bottom installed in 1986 and had various upgrades installed by CAPE, Inc. in 2014.

3. Tank Foundation The tank rests on a concrete ringwall. The foundation was visually evaluated during the inspection for broken concrete, spalling, cracks, and vegetation against the bottom of the tank. The tank bottom‐to‐pad sealant was inspected and was found to be in satisfactory condition. A shell settlement survey was performed during the inspection in accordance with Appendix B of API Standard 653. Settlement results are listed in Appendix A.

4. Tank Bottom The tank bottom was not evaluated during this In‐Service inspection. The tank bottom was previously inspected in June 2006 and had several patch plates installed due to underside corrosion at that time.

5. Tank Shell The shell is constructed of carbon steel material of an unknown grade. The shell is a cylindrical design, butt‐welded together, consisting of seven (7) courses. The shell interior and exterior have a thin film epoxy coating system. The coating was inspected for disbonding, adhesion, deterioration, and discoloration. The exterior shell coating has completely deteriorated. The shell was evaluated for remaining metal thickness utilizing ultrasonic technology. The ultrasonic thickness measurements and thickness measurement locations (TML) are listed in the Shell Plate Thickness Measurements table in Appendix A. A shell service life evaluation performed on all shell courses shows the shell has a remaining life of greater than 30 years under current conditions. The shell service life evaluation is shown in the Shell Service Life Evaluation table in Appendix A.

Roundness, plumbness, peaking, and banding of the shell are acceptable. The tank appears to be stable and does not appear to be in danger of overturning or buckling due to high winds or seismic conditions.

6. Tank Floating Roof The tank is equipped with an internal floating roof. The floating roof is a carbon steel double deck style roof. The roof primary and secondary seals and appurtenance penetration seals were inspected for tears and deterioration; all seals in the tank should be replaced. The annular space between the floating roof and the shell was measured and shows the floating roof relatively centered in the tank.

7. Tank Fixed Roof The fixed roof is a geodesic dome constructed of aluminum material of an unknown grade. The fixed roof is not coated. The roof is equipped with light hatches and a 24‐inch center vent. Evidence of water dripping on the IFR indicates some of the panels are leaking and should be resealed.

8. Tank Appurtenances

a. Water Draw‐Off System

1) Water Draw‐Off Line: The water draw‐off piping consists of a 2‐inch double block and bleed skin valve reduced to 1‐inch stainless steel piping with welded and flanged fittings. The internal piping extends into the sump.

2) Product Saver Tank: The 50‐gallon product saver tank (PST) is constructed of stainless steel. The PST is equipped with a Baldor brand electric pump. The PST is not grounded. The PST has piping extending to the high level control assemblies, is vented properly, and has a sight gauge with a density ball to the view fuel/water level.

b. Low Suction System The tank is equipped with a low suction line. The 4‐inch carbon steel exterior piping (reduced to 2‐inch after skin valve) is tied into the issue line. The skin valve to the tank is a ball valve and is not double block and bleed. The line is not equipped with a thermal relief system. The exterior piping, valves, flanges, and hardware have minor coating failure and corrosion. The line is equipped with a 2‐inch camlock fitting for tank stripping.

c. Issue Line The tank is equipped with two separate issue lines. The 8‐inch issue line is constructed of carbon steel; the line is used to facilitate transferring fuels between tanks. The line is not equipped with a thermal relief system; the skin valve to the tank is a double block and bleed valve. The 12‐inch issue line is constructed of carbon steel and is used to issue to the Type III hydrant fueling system. The line is equipped with a double block and bleed skin valve and is protected from overpressure with a thermal relief system.

d. Receipt Line The 8‐inch receipt line is carbon steel. The line is protected from over‐pressure with a thermal relief system and is equipped with a double block and bleed skin valve.

The thermal relief system consists of 1‐inch flanged and welded stainless steel piping and fittings. The receipt line is equipped with a CLA‐VAL hydraulic control valve to automatically stop fuel coming into the tank before overflow occurs.

e. Automatic Tank Gauging (Fuel Level) The tank is equipped with an ENRAF system for electronic fuel level gauging. The system is installed in an 8‐inch slotted aluminum stilling well. The system is mounted on top of the geodesic dome and has a platform for access. The ENRAF system is reported to be in working condition.

f. Automatic Tank Gauging (Water Level) The tank is equipped with an ENRAF VITO system for electronic water level and temperature gauging. The system is installed in a 4‐inch slotted stainless steel stilling well. This stilling well is located near the tank perimeter and not near the center sump and will not reliably detect water in the tank.

g. Mechanical Tank Gauging The tank is not equipped with a mechanical tape gauge for gauging product level. An MTG previously existed on the tank, and the piping to accommodate one still exists.

h. Tank Sampling\Manual Gauging The tank is equipped with separate stilling wells for sampling and manual gauging.

The tank sample gauge reel is located on the geodesic dome roof with a platform for access. The sample gauge is equipped with an 8‐inch slotted aluminum stilling well.

The tank is also manually gauged using the sample gauge well, although a manual gauge stilling well does exist. The manual gauge well is part of the ladder for accessing the top of the IFR. The manual gauge well is constructed of carbon steel, is not slotted, and the base does not use it for gauging.

i. Level Alarms\High Level Shut‐Off The ENRAF system provides low, low‐low, high, and high‐high level alarms. The tank is also equipped with independent alarms that provide low, low‐low, high, and high‐ high level alarms.

The high level alarm assembly and high level shut‐off assembly are accessible from the circumferential stairway with an extended platform. The piping consists of 1‐inch threaded carbon steel piping with lockable ball valves. The assemblies have a means for testing and have piping extending to the product saver tank. The flange for the high level alarm assembly has some coating failure with minor associated corrosion.

j. Ladder and Platforms The tank’s geodesic dome roof is accessible by a circumferential stairway mounted on the shell of the tank. The circumferential stairway has a platform for the high level alarm and shut‐off assemblies and for the gauging ports at the top of the tank.

The floating roof is accessible by an internal ladder through an access hatch on the fixed roof. A confined space warning sign posted to the hatch is faded and not legible.

k. Grounding The tank has nine (9) grounding straps around the circumference of the tank. The tank grounding cable is bolted to grounding lugs that are welded directly to the tank dead shell.

l.

9. T F

10. F T th

C. FIND

The f inspe

1. M M o in a

2. Sh S o re a

Anchorin The tank be in dang

Tank Piping uel is receive ire Protect he fire depa hat is access

DINGS AND

following inf ection:

Mandatory Mandatory fi ut of service ntegrity of th

. No Mand hort Term hort term fin f inspection epairs, grout

. Fuel Wee

OBSERVAT

VAL contro

CODE REF

RECOMME

The tubing ng has no anch ger of overtu g System ed by tanker tion System rtment prov sible adjacen

RECOMME

ormation id ndings inclu e if not accom he tank (e.g.

datory find ndings includ (e.g. spot co ting, etc.).

ep at Contr TION: A min ol valve on th

FERENCE: NF

ENDATION: T

g may need to or bolts. The urning or bu r trucks and m vides fire pro nt and outsid

ENDATIONS

entifies the de repairs re mplished. Su bottom or s ings noted de repairs th oatings, drai rol Valve nor fuel weep e 8‐inch rece

FPA 27.3.2

Tighten the th o be removed e tank appea ckling due to is issued to otection. The de of the fue

S significant fi equired that uch repairs a shell repairs hat are requ inage improv p was noted eipt line.

hreaded tubin d and Teflon t ars to be sta o high winds the Type III e tank has a el farm.

indings foun t provide cau are critical to ired within 5 vement, cali at the threa ng connectio tape added to ble and doe s or seismic c hydrant sys fire suppres nd during the use for the t o the structu

5 years or le ibration, me aded outlet tu n at the CLA‐V o the threads s not appea conditions.

stem.

ssion system e tank tank to rema ural or hydra ess from the echanical gau ubing for the

VAL control v s to stop the w r to m ain aulic date uge e CLA‐ valve.

weep.

b c.

. Failed Ex

OBSERVAT

completely surpassed

CODE REF

RECOMME

requireme

. Leaking R

OBSERVAT

dome roof

CODE REF

RECOMME

manufactu ternal Coati TION: The y deteriorate its useful life

FERENCE: UF

ENDATION: B

ents of UFGS 0

Roof Panels TION: Drip p

f. A small amo

FERENCE: AP

ENDATION: R

urer’s recomm ing shell extern ed, showing e.

FGS 09 97 13.

Blast and reco 09 97 13.27.

attern on the ount of water

PI‐653 4.2.1.2

Reseal the pa mendation.

al coating ( extensive d

.27, Exterior C oat the extern e top of the I r has pooled i nels for the g

(Courses 2‐7 iscoloration

Coating of Ste nal shell in ac

FR indicates in the center geodesic dom

7 including and cracking eel Structures ccordance wit leaking pane of the IFR.

me in accordan wind girder g/crazing and s th the els on the geo nce with the

) has d has odesic d e

. Deteriora

The seal m Penetratio well, and E

CODE REF

RECOMME

by the IFR.

urethane i

. IFR Protr coating fai

CODE REF

Petroleum accordanc ated IFR Sea TION: The pr material is re on seals for th ENRAF stilling

FERENCE: AP

ENDATION: R

. Install new p n accordance rusion Causi TION: An off ilure on the s

FERENCE: U

m Fuel Tanks

ENDATION: R

e with UFGS als rimary and se sting in the he IFR ladder g well have als

PI Standard 65

Remove the d primary and s e with UFGS 3 ing Shell Coa f‐center brack hell during tr

UFGS 09 97 1

Realign the of 09 97 13.17.

econdary foam displaced fue r/manual gau so deteriorat

50 Section H.

deteriorated s secondary wip 33 56 13.13 Se ating Failur ket used for avel of the IF

13.7 Three Co

ff‐center brac m wiper seals el trapped be uge well, VITO ted.

.4.3.1, UFGS 3

seal material per squeegee ection 2.13.2 re bolting down

FR.

oat Epoxy Int cket. Blast an s have comple etween the I O stilling wel

33 56 13.13 S trapped in th e seals made 2.7.

n the second terior Coatin nd recoat the etely deterior FR and tank ll, sampling s

Section 2.13.2 he fuel displa of closed cell ary seal is ca g of Welded affected area rated.

shell.

stilling

2.7 ced l cast ausing

Steel as in

3. L Lon wit app insp upg a b ong Term ng term findi h DoD Tank plicable crite pection (e.g.

grades, addit

. Stairway

OBSERVAT

the shell w

CODE REF

& API Stan

RECOMME

accordanc seal‐welde extend a m Standard 6

b. Tubing S

OBSERVAT

welded dir

CODE REF

RECOMME

27 Drawin ings include Standards ( eria. Repairs . coatings int tional manw y Reinforce TION: The c without reinfo

FERENCE: AP

ndard 650 Sec

ENDATION: I

e with AW 78 ed in accorda minimum of 2 650 Section 5

Support Re TION: Six tu rectly to the s

FERENCE: AW

ENDATION: I

g D.10 Detail repairs/upg

UFC 3‐460‐0

that may be ternal/exter ways etc.).

ement circumferenti orcement pad

PI Standard 6 ction 5.7.3 nstall reinfor 8‐24‐27 Draw nce with API 2‐inches beyo .7.3.

inforcemen ubing support shell without

W 78‐24‐27 D nstall suppor 5.

grades that a

01, UFC 3‐4

e deferred u rnal, planned ial stairway t

ds. (53 steps a

650 Section 5 rcement plate wing D.11 Deta 650 Section 5 nd the stair t nt ts for the con reinforcemen

Drawing D.10 rts for the tub are to be con

460‐03, AW 7

ntil the next d bottom re treads and su and 50 suppo

5.1.2.7, AW 7

es to the shel ail 2. All attac

5.1.3.7. Note:

tread and wel ntrol valve tu nt.

Detail 5 bing that are nsidered for 78‐24‐27) or t scheduled pairs, flat bo upports are w orts) 8‐24‐27 Draw l behind the s chments to th : Reinforceme ld spacing to ubing and HLA in accordance r compliance r other internal ottom tank welded direc wing D.11 De stairway trea he shell shoul ent pad is to meet API

A drain tubin e with AW 78 ctly to tail 2, ds in ld be ng are

8‐24‐ c d

. Groundi steel lugs reinforcem

CODE REF

RECOMME

with AW 7

d. Circumfe

OBSERVAT

for static d

CODE REF

stairway in ng Cables TION: Nine on the tank ment.

FERENCE: AW

ENDATION: E

78‐24‐27 Draw erential Sta TION: The ci discharge.

FERENCE: AW

ENDATION: I

n accordance grounding ca shell; the g

W 78‐24‐27 D

Exothermicall wing ED.02 De airway Gro ircumferentia

W 78‐24‐27 D nstall a groun with AW 78‐ ables are bol rounding lug

Drawing ED.02 ly weld the ex etail 2.

ounding al stairway is

Drawing D.11 nding cable to 24‐27 Drawin lted (not exo gs are welded

2 Detail 2 xisting nine g not equipped

Detail 4 o the handrai ng D.11 Detai othermically w d directly to ground straps d with a sepa il of the circu il 4.

welded) to ca the shell wi in accordanc arate ground mferential arbon ithout ce cable f.

g

. Upper Sh

OBSERVAT

floating pa

CODE REF

RECOMME

floating pa

Tank Lab

OBSERVAT

CODE REF

Note 3

RECOMME

indicating

. Confined

OBSERVAT

CODE REF

RECOMME

accordanc hell Manwa TION: The ta an’s high posi

FERENCE: UF

ENDATION: I

an at the high beling TION: The ta

FERENCE: U

ENDATION: M

the tank num d Space Lab TION: The co

FERENCE: UF

ENDATION: I

e with UFC 3‐ ay ank does not tion.

FC 3‐460‐01 T

nstall a 36‐in h leg position ank has the fa

FC 3‐460‐01

Mark the tank mber in accord beling onfined space

FC 3‐460‐01 S

nstall a confi ‐460‐01 Secti have an upp

Table 8‐1 Item ch manhole 3 in accordanc acility # poste

Section 2‐18 k with easily d dance with U e placard stick

Section 2‐18 b ned space pla on 2‐18 b.

er shell manh m (c) & AW 78

3’‐6” above th ce with AW 78 ed (5921) but

8 b and AW 7 discernible pa

FC 3‐460‐01

ker on the IFR b acard on the hole located

8‐24‐27 Draw he upper surf 8‐24‐27 Draw not the tank

78‐24‐27 Draw ainted letters and AW 78‐2

R access hatc ladder hatch above the int wing D.10 Deta face of the wing D.10 Det

# (1).

wing D.13 De s and number 24‐27.

ch is faded.

door in ternal ail 6 ail 6.

etail 3 rs h i.

h. Data Pla legible; a r

CODE REF

RECOMME

with AW 7

Mechani

OBSERVAT

the shell f unused MT

CODE REF

Table 8‐1 I te Obscure TION: The o repair data pl

FERENCE: AW

ENDATION: I

78‐24‐27 Draw ical Tape G TION: The t from a previ TG piping are

FERENCE: UF

ENDATION: I

Item (o) and A ed original manu ate provided

W 78‐24‐27 D nstall/restore wing D.10 Det auge (MTG ank does not ously installe e welded dire

FC 3‐460‐01 T

nstall a mech

AW 78‐24‐27

ufacturer’s da by CAPE, Inc

Drawing D.10 e the original tail 2.

G) t have a mec ed MTG that ctly to the sh

Table 8‐1 Item hanical tape g Drawing D.0 ata plate has . in 2014 exis

Detail 2 manufacture chanical tape has been re ell without re m (o) and AW gauge in acco 07 Detail 1.

s been painte sts.

er’s data plat gauge (MTG emoved. Five einforcement

W 78‐24‐27 D rdance with U ed over and e in accordan

G). Piping exis e supports fo t.

rawing D.07

UFC 3‐460‐01

is not nce sts on or the

Detail j.

k

VITO Wa located alo for detecti

CODE REF

RECOMME

in accorda

k. Fuel Sam

OBSERVAT

CODE REF

with AW 7 ater/Temp TION: The ta ong the perim ing water in t

FERENCE: AW

ENDATION: I

nce with AW mpling Conn TION: The 12

FERENCE: AW

ENDATION: I

78‐24‐27 Draw erature Pr ank is equipp meter and no he tank due t

W 78‐24‐27 D nstall a stillin ‐78‐24‐27 Dra nection 2‐inch issue li

W 78‐24‐27 nstall a fuel s wing D.13 Det obe ped with a VI t over the ce to the cone‐d

Drawing D.07 ng well for the awing D.07 D ine is not equ

Drawing D.

sample conne tail 4.

ITO water/te nter sump. T down bottom

Detail 3 e VITO water/ Detail 3.

uipped with a

.13 Detail 4 ector on the 1 mperature p This configura

/temperature a fuel samplin

12‐inch issue robe. The pro ation is not re e probe desig ng connection line in accord obe is eliable gned n dance

l. Appurte flange from (first flang water draw the tank.

CODE REF

UFGS 09 9

nance/Pip TION: Mino m tank), AFFF ge from cont w‐off DBBV. M

FERENCE: UF

ENDATION: B

7 13.27, Exte ing Coating or to modera F line (first fla tainment pen Major coating

FGS 09 97 13.

Blast and reco erior Coating o g Failures ate coating f ange from co netration), h g failure exist

.27, Exterior C oat the tank a of Steel Struc failure exists ontainment p igh level ala s on the AFFF

Coating of Ste appurtenance ctures.

on the low penetration), rm float cha F piping route eel Structures es/piping in a suction line 8‐inch receip amber flange ed along the t s accordance w

(first pt line e, and top of with m

m. Mildew/ inch issue

CODE REF

RECOMME

damaged d

n. Issue Lin

OBSERVAT

(DBB).

CODE REF

Detail 4

RECOMME

tank skin v Drawing D

/Algae on P TION: Milde piping.

FERENCE: Go

ENDATION: C

during cleanin ne TRV TION: The 8

FERENCE: U

ENDATION: I

valve in accor D.10 Detail 4.

Product Pip ew/algae stain ood engineer

Clean off mild ng, repairs sh

8‐inch issue li

FC 3‐460‐01

nstall a therm dance with U ping ning exists on ing practice dew/algae wit hould be mad ne has no me

Section 3‐3.1 mal relief syst n the undersi th a pressure e in accordan eans of therm

1.2 Item (j) a

tem for the p Section 3‐3.1 ide of the 8‐i e washer. If ex nce with UFG mal relief at t nd AW 78‐24 roduct issue

1.2 Item (j) an

nch receipt a xisting coatin S 09 97 13.27 the tank skin

4‐27 Drawing line around t nd AW 78‐24‐ and 8‐ g is 7.

valve g D.10 he ‐27 o p

. Wind Gir shell witho

CODE REF

RECOMME

supports. A Section 5.1 supports a

p. Water D

OBSERVAT

installed.

CODE REF

Detail 4

RECOMME

tank skin v Drawing D rder Suppo TION: The w out reinforcem

FERENCE: AP

ENDATION: I

All attachmen

1.3.7. Note: R

and weld spac raw TRV TION: The

FERENCE: U

ENDATION: I

valve in accor D.10 Detail 4.

ort Reinfor wind girder loc ment.

PI 653 C.1.2.4

nstall reinfor nts to the she Reinforcemen cing to meet A

2‐inch water

FC 3‐460‐01

nstall a therm dance with U cement cated on Cou

4 (c), API 650 S rcement plate ell should be s nt pad is to ex API Standard r draw‐off lin

Section 3‐3.1 mal relief syst rse 7 has 20 s

Section 5.1.3 es to the shel seal‐welded i xtend a minim 650 Section ne does not

1.2 Item (j) a

tem for the w Section 3‐3.1 supports wel

.7, and API 65 l behind the w in accordance mum of 2‐inch 5.7.3.

have means nd AW 78‐24 water draw‐of

1.2 Item (j) an

ded directly t

50 Section 5.7 wind girder e with API 650 hes beyond th s of thermal

4‐27 Drawing ff line around nd AW 78‐24‐ to the

7.3 he relief g D.10 the ‐27 q r.

s.

q. PST Grou

OBSERVAT

CODE REF

RECOMME

24‐27 Draw

. Low Suct

OBSERVAT

as the tank

CODE REF

RECOMME

accordanc and a ther

. Anti‐Rot

OBSERVAT

currently p

CODE REF

RECOMME

UFC 3‐460

unding TION: The Pr

FERENCE: NF

ENDATION: In wing D.13 De tion Line TION: The 4‐ k skin valve. T

FERENCE: UF

ENDATION: R

e with UFC 3‐ mal relief sys tation Devi TION: The IF provided by t

FERENCE: UF

ENDATION: I

0‐01 and AW‐7 roduct Saver

FPA 30, parag nstall a groun tail 5.

‐inch (reduce The line has n

FC 3‐460‐01 S

Reconfigure t ‐460‐01 Secti stem designed ce FR does not h he stilling we

FC 3‐460‐01 S

nstall anti‐ro 78‐24‐27.

Tank (PST) is graph 6.5.4 an nding cable to d to 2‐inch) l no means of t

Section 3‐6.7.

the low suctio on 3‐6.7.3 (a d in accordan have a dedica ells and IFR lad

Section 8‐8.2 tation cables not grounde nd AW 78‐24‐ o the product ow suction lin thermal relief

3 (a) and AW on piping outs ). Include a d nce with AW 7 ated device fo dder.

(d) s for the float ed at the leg.

‐27 Drawing D t saver tank a ne is not equ f installed.

W 78‐24‐27 Dr side the tank ouble block a 78‐24‐27.

or anti‐rotatio ing roof in ac

D.13 Detail 5 s shown in AW ipped with a rawing G.05 to be in and bleed valv

on. Anti‐rotat ccordance wit

W 78‐

DBBV

ve tion is th t.

u

. IFR Ladd

OBSERVAT

stainless, a

CODE REF

RECOMME

accordanc

u. High Lev

OBSERVAT

with threa

CODE REF

RECOMME

accordanc der/Manua TION: The IF and the gauge

FERENCE: AW

ENDATION: R

e with AW 78 vel Alarm/S TION: The h ded fittings, FERENCE: UF

ENDATION: In e with AW 78 al Gauge We FR/manual ga e well is not s

W 78‐24‐27 D

Replace the c 8‐24‐27 Draw

Shut‐off high‐level ala not flanged a

FC 3‐460‐01 T

nstall piping f 8‐24‐27 Draw ell auge well com slotted.

Drawings D.07 urrent stilling wings D.07 Det arms/shut‐off and welded.

Table 8‐1 Item for the high‐le wing D.12 Deta mbo is const

7 Detail 4 and g well/interna tail 4 and D.0 f piping cons m (x) & AW 78 evel alarm/sh ail 3.

ructed of car d D.08 Detail 2 al ladder with 08 Detail 2.

ists of carbo

8‐24‐27 Draw hut‐off assem rbon steel an h one designe n steel ball v wing D.12 Det mblies to be in nd not ed in valves ail 3

Appendix A

Engineering Calculations

1. Shell Service Life Evaluation

2. Shell Settlement Evaluation

Where:

t min = minimum acceptable shell thickness for each course, in inches; however, t min shall not be less than 0.1 inch for any tank course.

t nom = nominal shell thickness, in inches.

t act = current measured shell thickness, excluding pits and corrosion, in inches.

t prev = previous measured shell thickness, excluding pits and corrosion or t nom , in inches.

D = nominal diameter of the tank, in feet.

H = height from the bottom of the shell course under considerations to the established maximum liquid level, in feet.

H c = calculated safe fill height, in feet, for the current product.

G = specific gravity of the contents.

Y = specified minimum yield strength of the plate; use 30,000 pounds per square inch if not known

(N/A for riveted tanks).

T = smaller of the specified minimum tensile strength of the plate or 80,000 pounds per square inch;

use 55,000 psi if not known (N/A for riveted tanks).

S = The maximum allowable stress, in pounds per square inch. For welded tanks, use the smaller of

0.80Y or 0.429T for the bottom and the second course or the smaller of 0.88Y or 0.472T for all other courses. For riveted tanks, use S =21,000 psi. For elevated temperatures above 200OF, the maximum allowable stress shall be the smaller of 2/3 the minimum yield strength multiplied by the M-factor (M) of API Standard 650 Appendix M or the product design stress value listed in Table M-1a or M-1b of API Standard 650.

E = original joint efficiency for the tank. Use Table 4-2 from API Standard 653 if original E is unknown; 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 when greater than 6 inches from rivets; use the value of E from API Standard 653 Table 4-3 when within 6 inches of rivets.

L r = remaining life of the shell, in years.

C r = shell corrosion rate, in inches per year.

I ut = inspection interval for the next ultrasonic inspection, in years (not to exceed 15 years).

I v = inspection interval for the next visual external inspection, in years (not to exceed 5 years).

Y = years between the previous measured shell thickness (t prev ) and the current measured shell thickness (t act ), in years.

The maximum inspection intervals are determined by the most restrictive shell course in regard to the remaining life and the corrosion rate calculations for each shell course using the following formulas:

Shell Service Life Evaluation tmin =

2.6(H−1)DG

SE

Lr = tact − tmin

Cr Cr = tprev − tact Y Iut = tact − tmin 2Cr

Iv = tact − tmin

4Cr

1) Minimum Required Thickness

D = 67 feet

G = 0.84

∆Y = 67 years

Course No.

Plate Specification

Course Height (feet)

Product Height (feet) (H )

Maximum Allowable

Stress (psi) (S )

Joint Efficiency

(E )

Minimum Acceptable Thickness (inches) (t min )

Previous Measured Thickness (inches) (t prev )*

Current Measured Thickness (inches)

(t act )

1 Unknown 5.08 41.47 23,600 0.70 0.358 0.500 0.466 2 Unknown 6.75 36.39 23,600 0.70 0.313 0.438 0.427 3 Unknown 6.75 29.64 26,000 0.70 0.230 0.313 0.319 4 Unknown 6.75 22.89 26,000 0.70 0.176 0.250 0.255 5 Unknown 6.92 16.14 26,000 0.70 0.122 0.250 0.239 6 Unknown 6.92 9.22 26,000 0.70 0.100 0.250 0.231 7 Unknown 6.92 2.30 26,000 0.70 0.100 0.250 0.245

*The t prev values were based on t nom .

Shell Service Life Evaluation

0.000

0.050

0.100

0.150

0.200

0.250

0.300

0.350

0.400

0.450

0.500

0.550

1 2 3 4 6 7

In ch es

Course

Thickness Graph tprev tact tmin

Shell Service Life Evaluation

2) Corrosion Rate, Remaining Life and Inspection Intervals

Course No.

Corrosion Rate

(in./yr) (C r )

Remaining Life

(years) (L r )

Next Visual

Inspection (years)

(I v )

Next Ultrasonic Thickness Inspection

(years) (I ut )

1 0.00051 211 5 15 2 0.00016 724 5 15 3 0.0002* 443 5 15 4 0.0002* 394 5 15 5 0.00016 714 5 15 6 0.00028 461 5 15 7 0.00007 1943 5 15

* Let C r =0.0002 inches per year for calculation purposes.

Note: The engineering data used to calculate in-service period of operation (Remaining Life) assumes the tank remains in the same service and all corrosion rates remain constant. The maximum safe fill height for the tank is not limited other than by the established maximum operating liquid level and any other appurtenance such as overflow, vents, or firefighting system.

0.00000

0.00010

0.00020

0.00030

0.00040

0.00050

0.00060

1 2 3 4 5 6 7

In ch es P er Y ea r

Course

Course Corrosion Rate Graph

Corrosion Rate

3) Projected Thickness Chart and Graph

Course #1:

Year Thickness tmin 2019 0.466 0.35848588 2024 0.463 0.35848588 2029 0.461 0.35848588 2039 0.456 0.35848588 2049 0.451 0.35848588

*based on same service and corrosion rates.

Course #2:

Year Thickness tmin 2019 0.427 0.31348914 2024 0.426 0.31348914 2029 0.425 0.31348914 2039 0.424 0.31348914 2049 0.422 0.31348914

*based on same service and corrosion rates.

Anticpated Thickness (5 yrs)* Anticpated Thickness (10 yrs)* Anticpated Thickness (20 yrs)* Anticpated Thickness (30 yrs)*

Current Thickness:

Current Thickness:

Anticpated Thickness (5 yrs)* Anticpated Thickness (10 yrs)* Anticpated Thickness (20 yrs)* Anticpated Thickness (30 yrs)*

0.000

0.050

0.100

0.150

0.200

0.250

0.300

0.350

0.400

0.450

0.500

2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047 2049

In ch es

Year

Course #1 Projected Thickness Graph

Thickness tmin

0.000

0.050

0.100

0.150

0.200

0.250

0.300

0.350

0.400

0.450

2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047 2049

In ch es

Year

Course #2 Projected Thickness Graph

Thickness tmin

Course #3:

Year Thickness tmin 2019 0.319 0.23028168 2024 0.318 0.23028168 2029 0.317 0.23028168 2039 0.315 0.23028168 2049 0.313 0.23028168

*based on same service and corrosion rates.

Course #4:

Year Thickness tmin 2019 0.255 0.17601168 2024 0.254 0.17601168 2029 0.253 0.17601168 2039 0.251 0.17601168 2049 0.249 0.17601168

*based on same service and corrosion rates.

Anticpated Thickness (20 yrs)* Anticpated Thickness (30 yrs)*

Anticpated Thickness (20 yrs)* Anticpated Thickness (30 yrs)*

Current Thickness:

Anticpated Thickness (5 yrs)* Anticpated Thickness (10 yrs)*

Current Thickness:

Anticpated Thickness (5 yrs)* Anticpated Thickness (10 yrs)*

0.000

0.050

0.100

0.150

0.200

0.250

0.300

0.350

2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047 2049

In ch es

Year

Course #3 Projected Thickness Graph

Thickness tmin

0.000

0.050

0.100

0.150

0.200

0.250

0.300

2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047 2049

In ch es

Year

Course #4 Projected Thickness Graph

Course #5:

Year Thickness tmin 2019 0.239 0.12174168 2024 0.238 0.12174168 2029 0.237 0.12174168 2039 0.236 0.12174168 2049 0.234 0.12174168

*based on same service and corrosion rates.

Course #6:

Year Thickness tmin 2019 0.231 0.1 2024 0.230 0.1 2029 0.228 0.1 2039 0.225 0.1 2049 0.222 0.1

*based on same service and corrosion rates.

Anticpated Thickness (20 yrs)* Anticpated Thickness (30 yrs)*

Anticpated Thickness (30 yrs)*

Current Thickness:

Anticpated Thickness (5 yrs)* Anticpated Thickness (10 yrs)*

Current Thickness:

Anticpated Thickness (5 yrs)* Anticpated Thickness (10 yrs)* Anticpated Thickness (20 yrs)*

0.000

0.050

0.100

0.150

0.200

0.250

2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047 2049

In ch es

Year

Course #6 Projected Thickness Graph

Thickness tmin

0.000

0.050

0.100

0.150

0.200

0.250

0.300

2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047 2049

In ch es

Year

Course #5 Projected Thickness Graph

Course #7:

Year Thickness tmin 2019 0.245 0.1 2024 0.245 0.1 2029 0.244 0.1 2039 0.244 0.1 2049 0.243 0.1

*based on same service and corrosion rates.

Current Thickness:

Anticpated Thickness (5 yrs)* Anticpated Thickness (10 yrs)* Anticpated Thickness (20 yrs)* Anticpated Thickness (30 yrs)*

0.000

0.050

0.100

0.150

0.200

0.250

2019 2021 2023 2025 2027 2029 2031 2033 2035 2037 2039 2041 2043 2045 2047 2049

In ch es

Year

Course #7 Projected Thickness Graph

Shell Settlement Evaluation

Where:

S max = maximum permissible out-of-plane deflection, in feet.

L = ΠD /N = arc length between measurement points, in feet.

D = tank diameter, in feet N = number of survey points.

Y = yield strength, in pounds per square inch (psi).

E = young's modulus, in pounds per square inch (psi) H = tank height, in feet

D = 67 feet N = 8 L = 3.14(67)/8 = 26.3 feet Y = 30,000 psi E = 29,000,000 psi H = 46.08 feet

L 2 = 692.2602 square feet

11(692.2602)(30,000) 2(29,000,000)(46.08)

1) Maximum Permissible Out-of-Plane Deflection Calculation

S max = = 0.0855 feet

𝑆𝑚𝑎𝑥 ൌ 11𝐿ଶ𝑌

2𝐸𝐻

|S i | = U i - (1/2U i-1 + 1/2U i+1 ) Where:

|S i | = magnitude of the calculated out-of-plane deflection, in feet.

U i = Out-of-Plane settlement of point "i ", in feet

(+) when above cosine curve (-) when below cosine curve

Point Actual Curve

Fit U i U i+1 U i-1 S i |S i |

1 0.02083 0.00000 0.02083 0.01981 -0.01144 -0.01144 0.01665 2 0.00000 0.01144 -0.01144 0.02083 -0.03906 -0.03906 0.00233 3 0.00000 0.03906 -0.03906 -0.01144 -0.02502 -0.02502 0.02083 4 0.04167 0.06668 -0.02502 -0.03906 -0.02604 -0.02604 0.00753 5 0.05208 0.07813 -0.02604 -0.02502 0.01144 0.01144 0.01925 6 0.07813 0.06668 0.01144 -0.02604 0.03385 0.03385 0.00753 7 0.07292 0.03906 0.03385 0.01144 0.01981 0.01981 0.01823 8 0.03125 0.01144 0.01981 0.03385 0.02083 0.02083 0.00753

R 2 = 0.93

In accordance with API 653 Annex B, the tank settlement is within exceptable limits.

1) Out-of-Plane Deflection Calculation

Shell Settlement Graph

2 3

0.005

0.01

0.015

0.02

0.025

0.03

0.035

0.04

0.045

0.05

0.055

0.06

0.065

0.07

0.075

0.08

0.085

2 3 4 5 6 7 8 1 2

E le va ti ns fe et

Data PointsShell Settlement

Optimum Cosine Curve

Min. Settlement at (Pt 1)

Max. Settlement at (Pt 4)

Appendix B

Engineering Drawings

1. Shell Layout Drawing

2. Floating Roof Layout Drawing

3. Containment Layout Drawing

Remarks/Legend:

Owner/Operator:

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

US Army - Barksdale AFB; Barksdale AFB, LA

InterSpec, LLC.

1/14/2019 N/A N/A

Tank 1 (Facility 5921) S-1Shell Layout [1 of 4]

Seam #1 is the first shell seam left of the manway on the first shell course viewing from the outside.

The number in the upper right corner of each plate identifies the plate by the course and position of the plate in that course.

1-1 1-2

2-1 2-2

3-1 3-2

4-1 4-2

5-25-1

6-1 6-2

7-1 7-2

A - 1" High Level Alarm B - 1" High Level Alarm C - 1" Float Control D - 1" Float Control E - 4" Fire Fighting F - 36" Manway G - 4" Fire Fighting H - 4" Fire Fighting I - 4" Low Suction J - 8" Issue K - 1" Low Level Alarm L - 1" Low Level Alarm M - 4" Fire Fighting N - 24" x 36" Oblong Manway O - 8" Receipt P - 4" Fire Fighting Q - 4" Fire Fighting R - 12" Type III Issue S - 1" Water Draw T - 1/2" Plug

A

B

C

D

E

F

G

Ground Strap

Wind Girder

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

US Army - Barksdale AFB; Barksdale AFB, LA

InterSpec, LLC.

1/14/2019 N/A N/A

Tank 1 (Facility 5921) S-2Shell Layout [2 of 4]

Seam #1 is the first shell seam left of the manway on the first shell course viewing from the outside.

The number in the upper right corner of each plate identifies the plate by the course and position of the plate in that course.

1-3 1-4

2-3 2-4

3-3 3-4

4-3 4-4

5-3 5-4

6-3 6-4

7-3 7-4

A - 1" High Level Alarm B - 1" High Level Alarm C - 1" Float Control D - 1" Float Control E - 4" Fire Fighting F - 36" Manway G - 4" Fire Fighting H - 4" Fire Fighting I - 4" Low Suction J - 8" Issue K - 1" Low Level Alarm L - 1" Low Level Alarm M - 4" Fire Fighting N - 24" x 36" Oblong Manway O - 8" Receipt P - 4" Fire Fighting Q - 4" Fire Fighting R - 12" Type III Issue S - 1" Water Draw T - 1/2" Plug

H

I J

K

L

Ground Strap

Old

MTG

Piping

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

US Army - Barksdale AFB; Barksdale AFB, LA

InterSpec, LLC.

1/14/2019 N/A N/A

Tank 1 (Facility 5921) S-3Shell Layout [3 of 4]

Seam #1 is the first shell seam left of the manway on the first shell course viewing from the outside.

The number in the upper right corner of each plate identifies the plate by the course and position of the plate in that course.

1-5 1-6 1-7

2-5 2-6

3-5 3-6

4-5 4-6

5-5 5-6

6-5 6-6

7-5 7-6

A - 1" High Level Alarm B - 1" High Level Alarm C - 1" Float Control D - 1" Float Control E - 4" Fire Fighting F - 36" Manway G - 4" Fire Fighting H - 4" Fire Fighting I - 4" Low Suction J - 8" Issue K - 1" Low Level Alarm L - 1" Low Level Alarm M - 4" Fire Fighting N - 24" x 36" Oblong Manway O - 8" Receipt P - 4" Fire Fighting Q - 4" Fire Fighting R - 12" Type III Issue S - 1" Water Draw T - 1/2" Plug

M

N

O

P

Ground Strap

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

US Army - Barksdale AFB; Barksdale AFB, LA

InterSpec, LLC.

1/14/2019 N/A N/A

Tank 1 (Facility 5921) S-4Shell Layout [4 of 4]

Seam #1 is the first shell seam left of the manway on the first shell course viewing from the outside.

The number in the upper right corner of each plate identifies the plate by the course and position of the plate in that course.

1-8

2-7 2-8

3-7

4-7

6-7

5-7

7-7

A - 1" High Level Alarm B - 1" High Level Alarm C - 1" Float Control D - 1" Float Control E - 4" Fire Fighting F - 36" Manway G - 4" Fire Fighting H - 4" Fire Fighting I - 4" Low Suction J - 8" Issue K - 1" Low Level Alarm L - 1" Low Level Alarm M - 4" Fire Fighting N - 24" x 36" Oblong Manway O - 8" Receipt P - 4" Fire Fighting Q - 4" Fire Fighting R - 12" Type III Issue S - 1" Water Draw T - 1/2" Plug

Q

R

S T

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

US Army - Barksdale AFB; Barksdale AFB, LA

InterSpec, LLC.

1/14/2019 N/A N/A

Tank 1 (Facility 5921) F-1Floating Roof Layout [1 of 1]

The measured tank diamater is 65.34 feet.

The floating roof consists of 48 plates.

P

P

P

P

P

P

P

P

P

P

P

1 2 3 4 5

6 7 8

9 10 11 12

13 14 15 16 17

18 19 20 21 22

23 24 25 26

27 28 29 30 31

32 33 34 35 36

37 38 39 40

41 42 43

45 46

A - 24" Manway B - 4" Emergency Roof Drain C - Roof Drain D - 6" Vacuum Breaker E - 24" Pontoon Inspection Hatch

- 4" Floating Roof Leg

- 20" Pontoon Inspection Hatch

Q

R

S T

A B

C

DE

P

Foam Dam

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

US Army - Barksdale AFB; Barksdale AFB, LA

InterSpec, LLC.

1/14/2019 N/A N/A

Tank 1 (Facility 5921) C-1Containment Layout [1 of 1]

The secondary containment consists of a gravel floor and concrete dike walls.

146'-0"

247'-0"

Tank #1 (Facility 5921)

Stairway

Drain

Exposed areas of concrete inside the secondary containment were evaluated for cracking, spalling, and areas of failed joint sealant with no discrepancies noted.

Appendix C

Engineering Data

1. Shell Settlement Measurements

2. First Shell Course Plate Thickness Measurements

3. Shell Drop Thickness Measurements

4. Shell Nozzle and Nozzle Reinforcement

5. Floating Roof Rim Spacing and Seal Gap Measurements

6. Floating Roof Plate Thickness Measurements

Shell Settlement Measurements

1 32 2 32.25 3 32.25 4 31.75 5 31.625 6 31.3125 7 31.375 8 31.875

NOTE: The Rod Heights are based on the actual height of the transit at the time of the data collection. This data should only be used for this report. Point #1 is located at Vertical Shell Seam #1.

Point No. Rod Height (inches)

First Shell Course Plate Thickness Measurements

0.489 0.466 0.495

0.491 0.462 0.470

0.475 0.496 0.498 0.500 0.502 0.504 0.487 0.511 0.513 0.499 0.495

0.469 0.474 0.473

0.473 0.472 0.486

0.483 0.459 0.466 0.471 0.450 0.457 0.460 0.461 0.462 0.465 0.469

0.495 0.470 0.488

0.472 0.465 0.469

0.450 0.453 0.449 0.460 0.457 0.463 0.463 0.468 0.469 0.470 0.471

0.488 0.487 0.460

0.498 0.484 0.488

0.473 0.477 0.479 0.481 0.483 0.485 0.489 0.493 0.495 0.492 0.489

0.480 0.469 0.475

0.483 0.471 0.475

0.472 0.471 0.473 0.477 0.477 0.480 0.479 0.479 0.479 0.478 0.480

0.450 0.467 0.470

0.471 0.471 0.469

0.491 0.487 0.484 0.485 0.484 0.484 0.481 0.482 0.472 0.468 0.472

0.482 0.488 0.488

0.479 0.488 0.483

0.483 0.484 0.480 0.479 0.480 0.477 0.475 0.457 0.481 0.481 0.483

Shell Plate Thickness Measurements

NOTE: The bottom two rows are thicknesses across the bottom of the shell plate. The vertical thicknesses are at the vertical seams and in the middle of the plate. The thickness measurements are in inches and were taken randomly. The lowest UT measurements are in RED, and the highest UT measurements are in GREEN for the first shell course.

Shell Plate Number 1-1

Shell Plate Number 1-5

Shell Plate Number 1-4

Shell Plate Number 1-2

Shell Plate Number 1-3

Shell Plate Number 1-7

Shell Plate Number 1-6

Shell Drop Thickness Measurements

No.

Course #1

Course #2

Course #3

Course #4

Course #5

Course #6

Course #7

1 0.477 0.438 0.341 0.277 0.242 0.231 0.245 2 0.480 0.437 0.341 0.274 0.241 0.244 0.252 3 0.478 0.436 0.342 0.262 0.247 0.242 0.249 4 0.481 0.439 0.341 0.260 0.248 0.244 0.249 5 0.480 0.434 0.344 0.262 0.244 0.241 0.247 6 0.498 0.429 0.319 0.264 0.245 0.237 0.247 7 0.474 0.427 0.327 0.260 0.241 0.241 0.248 8 0.466 0.436 0.337 0.255 0.247 0.244 0.251 9 0.478 0.444 0.339 0.259 0.239 0.245 0.247

10 0.474 0.437 0.340 0.262 0.244 0.244 0.249

NOTE: Thickness measurements are evenly spaced down each course along the path of each drop. The thickness measurements are in inches. The lowest UT measurements are in RED, and the highest UT measurements are in GREEN for each shell course.

Shell Nozzle and Nozzle Reinforcement

Nom. 0o 90o 180o 270o

A 1" High Level Alarm 0.179 NA NA NA NA B 1" High Level Alarm 0.179 NA NA NA NA C 1" Float Control 0.179 NA NA NA NA D 1" Float Control 0.179 NA NA NA NA E 4" Fire Fighting Foam 0.337 NA NA NA NA F 36" Manhole 0.500 0.510 0.509 0.514 0.511 G 4" Fire Fighting Foam 0.337 NA NA NA NA H 4" Fire Fighting Foam 0.337 NA NA NA NA I 4" Tank Drain 0.337 0.378 0.380 0.377 0.366 J 8" Issue 0.500 0.502 0.500 0.478 0.501 K 1" Low Level Alarm 0.179 NA NA NA NA L 1" Low Level Alarm 0.179 NA NA NA NA M 4" Fire Fighting Foam 0.337 NA NA NA NA N 20" Oval Manhole 0.500 0.488 0.489 0.497 0.488 O 8" Receipt 0.500 0.508 0.512 0.510 0.500 P 4" Fire Fighting Foam 0.337 NA NA NA NA Q 4" Fire Fighting Foam 0.337 NA NA NA NA R 12" Type III Issue 0.500 0.538 0.548 0.554 0.521 S 2" Water Draw 0.218 0.216 0.220 0.218 0.212 T 1" Cap/Plug 0.179 NA NA NA NA

Nom. 0o 90o 180o 270o

E Circular 0.250 NA NA NA NA F Diamond with Round Corners 0.500 0.500 0.504 0.501 0.506 G Circular 0.250 NA NA NA NA H Circular 0.250 NA NA NA NA I Oval 0.594 0.603 0.601 0.608 0.605 J Tombstone 0.594 0.608 0.602 0.608 0.605 M Circular 0.250 NA NA NA NA N Diamond with Round Corners 0.500 0.500 0.498 0.499 0.502 O Tombstone 0.594 0.600 0.599 0.602 0.600 P Circular 0.250 NA NA NA NA Q Circular 0.250 NA NA NA NA R Diamond with Round Corners 0.594 0.600 0.598 0.597 0.602

Noz Desig. Reinforcement Description

Thickness Measurements (inches)

Thickness Measurements (inches)Noz Desig. Nozzle Description

Shell Nozzle Measurements

Shell Nozzle Reinforcement Measurements

Floating Roof Rim Spacing and Seal Gap Measurements

Number

Rim Spacing

(in inches)

Seal Gap

(in inches) Point

Number

Rim Spacing

(in inches)

Seal Gap

(in inches)

1 8 1/4 NA Points are opposite of each other 5 8 1/8 NA 2 5 3/4 NA Points are opposite of each other 6 7 1/8 NA 3 7 1/2 NA Points are opposite of each other 7 8 1/2 NA 4 7 3/4 NA Points are opposite of each other 8 8 3/4 NA

NOTE: Point #1 is at Seam #1 and subsequent points are 26.3 feet apart to the left viewing from inside.

Seam #1 is the first seam left of the first manhole left of the ladder in the first shell course viewing from the outside. Seal gap was not measured as the IFR seals are completely deteriorated.

Floating Roof Plate Thickness Measurements

1 2 3 4 5 1 0.180 0.179 0.178 0.180 0.183 A 2 0.182 0.182 0.181 0.182 0.181 E 3 0.180 0.181 0.178 0.177 0.184 E 4 0.180 0.183 0.181 0.180 0.183 E 5 0.182…