Attachment J.2 Fac 667 OOS Insp Report '13.pdf

API 653

Inspection Report

Out-Of-Service or Internal Inspection w/ External Checklist

Report Prepared For

CREECH AFB

Indian Springs, Nevada

JP-8

Tank Number

Inspected on

February 21, 2013

Report Prepared By

PPPOOOWWWEEERRRSSS

ENGINEERING & INSPECTION, INC.

PO BOX 1928

BENICIA, CA 94510

TEL 707 334 3400

FAX 707 922 2284

WWW.POWERSEI.COM

Gary Powers, P.E.

Authorized Inspector 0691

ASNT Level II UT, PT, MT and VT API 653 Appendix G MFL Certified

California Civil Engineer 60589

Inspection History Constructed New Bottom Annular Plates External Inspection Internal Inspection Shell UT Inspection

1979 - - 2/21/2013 2/21/2013 2/21/2013

Next Inspection: 2018 2033 2028

Revisions

Rev. 0 3/8/13 Report

BENICIA, CA 94510

CREECH AIR BASE

API 653 INTERNAL INSPECTION

INDIAN SPRINGS, NV

ENGINEERING & INSPECTION, INC www.powersei.com Tank 1

API653 Internal Creech AFB Tk 1 Rev 1 © 2013 PE&I Inc.

Page 2 of 15 Date Printed: 3/8/13 1:24 PM

EXECUTIVE SUMMARY

Powers Engineering and Inspection, Inc. was contracted by Weston Solutions to provide an API 653 Inspection for Tank 1 at the Creech Air Base in Indian Springs, NV.

The 18-ft dia. x 16-ft high was constructed in 1979 with a 0.250-in lap-welded bottom by Brown Tank and Steel. At the time of the inspection the tank was equipped with a steel cone roof and an aluminum honeycomb floating roof.

The report and executive summary are based on field inspection and evaluation in accordance with the API 653 Standard. Before the tank is returned to service all the requirements of API 650 and 653 should be met.

Inspection Methods

Employed Results

1 Identify any current leak paths resulting from corrosion, internal or external.

API 653

Appendix G MFL (Magnetic Flux Leakage) bottom corrosion survey.

100% Visual Inspection (VT) of shell, annular plate, corner weld and all bottom welds for defects cracks or corrosion Digital Camera Documentation.

1.1 The 0.250-in bottom was inspected for soil side corrosion utilizing the MFE 2412 Mark II scanner.

1.2 Isolated areas of magnetic flux leakage were detected during the floor scan and were proved up with a UT scrub. All of these indications were from grinded down weld tear-outs with the exception of one area of soil-side corrosion with a remaining thickness of 0.200-in. Next Inspection calculations show that if this soil-side corrosion is left unaddressed, this area will corrode to the minimum remaining thickness of 0.050-in in 21 years. No corrective action is required.

1.3 100% visual inspection of the bottom was performed. No significant product-side pitting was identified.

1.4 All areas inaccessible to the scanner were 100% UT scrubbed. No indication of soil-side corrosion was located.

1.5 The period-to-next formal API 653 Internal Inspection, utilizing the MRT method described in API 653 4th Edition may be extended to a maximum of 20 years per corrosion rate calculations if the bottom repairs are performed.

However, more stringent governing regulatory intervals of inspection may supersede this interval.

2 Identify any risk areas for future leak path development

Utilize Ultrasonic Testing (UT) to find areas of potential thinning or corrosion loss from internal corrosion.

Documentation of any brittle fracture concerns including nozzle weld spacing.

2.1 The external bottom extension-to-foundation caulking is in overall good condition with the exception of isolated voids and holes. It is possible that water has entered through these areas, is present under the tank and may contribute to accelerated soil-side corrosion. It is recommended that isolated caulking be applied to areas of the bottom caulking with voids.

2.2 The sump was UT scanned along equally spaced sections along the circumference with an average wall thickness of 0.400-in.

2.3 The 36-in manway cover is unable to fully open due to adjacent piping.

2.4 The fillet weld along the 24-in manway has isolated areas of under-fill. No corrective action is recommended.

2.5 The conduits along the tank shell are supported by uni-struts welded directly to the tank without the use of repads. No corrective action is recommended.

2.6 There are two areas along the shell with poor weld spacing (24-in manway repad weld and 4-in inlet nozzle repad weld – see Shell Roll Out drawing). Since the tank has been in operation at full fill height without an issue, no corrective action is required. Monitor these two areas for any change.

3 Settlement Survey of the shell base for settlement.

Survey of the bottom for settlement.

3.1 The maximum out-of-plane settlement was approximately 1.75-in, which is within acceptable limits of API 653 Appendix B calculations for differential settlement. See survey results.

3.2 No significant edge settlement was identified.

3.3 The bottom is cone-down by approximately 4-in.

3.4 The shell was inspected for verticality and distortion. No significant

BENICIA, CA 94510

Page 3 of 15 Date Printed: 3/8/13 1:24 PM

Inspection Methods Employed

Results distortion was indicated.

3.5 The seismic loads were calculated utilizing the latest API 650 Appendix E (ASCE 7/ IBC 2009 methods). The risk of damage from a seismic event is minimal for all fill heights.

4 Venting VT of existing roof vents

4.1 The tank is equipped with 2: 12x24-in open roof vents.

4.2 The cone roof is also vented with a 6-in PV vent and an 8-in open vent.

5 Access Structure

VT of existing access structure.

5.1 The handrails and upper platform have only minor coating failure.

5.2 The caged vertical safety ladder supports are attached to the shell with seal-welded repads.

6 Cone Roof VT of existing roof

6.1 The tank is equipped with a steel cone roof.

6.2 The coating along the cone roof is in overall good condition with only minor, isolated areas of cracking type failure.

7 Floating Roof VT of existing floating roof

7.1 The tank is equipped with an aluminum honeycomb floating roof with a rubber, double wiper seal.

7.2 The floating roof primary seals are cracked throughout and have completely failed in isolated places. The secondary wiper was turned up in at least one place. It is recommended that both seals be replaced.

7.3 During time of inspection, the floating roof legs were set at approximately 60-in.

7.4 The rim space varies from 3-in to 7-in.

7.5 Trace product is present on the top of the floating roof deck. Verify that the tank is free from product before performing any hot work.

8 Tank gauging overfill protection

VT of existing systems Is a Clay valve present?

If the preferred gauging system present?

8.1 The 8-in and 4-in gauge poles are slotted along their entire height. Both gauge poles are equipped with seismic sleeves and seal-welded repads which allow vertical movement but restrain horizontal movement.

8.2 The tank is equipped with a Cameron tank radar which is mounted inside the 4-in slotted stilling well and does not appear to communicate with the Claval.

8.3 The Hi-Hi alarm is located at 16-in from the top of the shell and the Hi-alarm is located 48-in below the top of the shell. Both components are connected to a Claval.

8.4 Low and low-low alarms were not present.

8.5 The tank is not equipped with a level-float system.

8.6 The Hi-Hi alarm, as well as related pipe nipples and brackets, have threaded components which should be replaced with welded components.

8.7 A product recovery system was not observed near the tank.

9 Dike VT of the existing Dike

9.1 The tank is surrounded by a concrete dike with a liner installed throughout the dike area. Both the concrete pad and liner appear to be in good condition.

BENICIA, CA 94510

Page 4 of 15 Date Printed: 3/8/13 1:24 PM

ACTION OR CRITICAL ITEMS

REQUIRED REPAIRS PRIOR TO RETURN TO SERVICE

(MANDATORY)

Listed below are the critical findings noted during the inspection that would prevent Tank 1 from returning to service:

1. (finding) Trace product was present on the top of the floating roof deck.

(recommendation) Verify that the tank is free from product before performing any hot work.

2. (finding) The rubberized components of the floating roof seal are dried and cracked and are no longer providing a reliable seal. In several areas, the seal is missing a section. (recommendation) Install new seals.

CONSIDERATIONS OR RECOMMENDED REPAIRS

RECOMMENDED REPAIRS PRIOR TO RETURN FOR SERVICE (NON-

MANDATORY/NEAR FUTURE)

The following are deficiencies identified during this inspection that the Inspector feels are mandatory items and should be addressed as soon as possible to insure continued safe operation of Tank 1:

3. (finding) An isolated area with 0.200-in remaining thickness-soil side was located on the floating roof deck. (recommendation) Install a 12x12-in seal-welded lap patch over the marked area (see Bottom Lay-Out Drawing).

4. (finding) The caulking along the foundation to bottom extension contact is in good shape with the exception of some isolated voids. (recommendation) Apply touch-up caulking to areas of the bottom-to-foundation caulking with voids.

5. (finding) The gaskets along the floating roof penetrations are worn or highly damaged.

(recommendation) Replace all gaskets along the floating roof penetrations.

6. (finding) No shell vent/overflows are present. Although a rim vent is present along the top angle, military guidelines may prefer shell vents. (recommendation) Install shell vents/overflows.

7. (finding) The tank is equipped with one 24-in manway and one 36-in manway. UFC requires two 36-in manways. (recommendation) Install two 36-in manways at ground level.

NON-MANDATORY ITEMS

8. (finding) No API 650 nameplate is present on the tank shell although one is located on the roof manway (recommendation) Install a properly mounted API650 nameplate above the 36-in manway.

9. (finding) A non API thickened insert was installed with poor weld spacing at an unknown time along the 4-in inlet nozzle. Presumably during installation of the insert, a slight inward distortion of the shell occurred. (recommendation) No corrective action is required because these items have been in service for some time, an indication that the brittle fracture risk is low.

BENICIA, CA 94510

Page 5 of 15 Date Printed: 3/8/13 1:24 PM

10. (finding) A poor weld spacing exists between a shell vertical weld and the 24-in manway repad weld. (recommendation) No corrective action is required because these items have been in service for some time, an indication that the brittle fracture risk is low.

BENICIA, CA 94510

Page 6 of 15 Date Printed: 3/8/13 1:24 PM

Table of Contents

Executive Summary Action or Critical Items

Required Repairs Prior to Return to Service (Mandatory) Considerations or Recommended Repairs

Recommended Repairs Prior to Return for Service (Non-Mandatory/Near Future) Non-Mandatory Items

Basic Tank Information Shell Settlement Survey Shell Thickness Calculation Shell Roll-Out Cone Roof Bottom Lay-out Next Inspection Seismic API 2000 Venting Calculations

Appendix A API 653 Checklist Appendix B Photo’s

Initial Inspection Significant Photos Initial Inspection General Photos Appendix C Non-Destructive Examination (NDE) UT Report

BENICIA, CA 94510

Page 7 of 15 Date Printed: 3/8/13 1:24 PM

BASIC TANK INFORMATION

Tank Number: Owner: Location: Unit/Zone/Area:

US AIR FORCE

INDIAN SPRINGS

CREECH, AFB

LIQUID FUELS

Product: Diameter (ft): Height (ft): Capacity (gallons):

26,650

Type Tank:

Year Built: Design Standard: Manufacturer:

CONE ROOF TANK W/ ALUMINUM

FLOATING ROOF

API 650 7th

BROWN TANK AND STEEL

Type Roof: Type Foundation: Type Bottom:

BUTT-WELDED

STEEL CONE

CONCRETE PAD

1/4-IN LAP WELDED

Type Floating Roof: Type Primary Seal: Type Secondary Seal: Roof Drain:

ALUMINUM HONEYCOMB

RUBBER WIPER

RUBBER WIPER

3-IN

Roof Access: Floating Roof Access: Roof Vents: Roof Man ways:

CAGED VERTICAL

LADDER

PORTABLE LADDER

2: 12X24-IN OPEN VENT

1:6-IN PV VENT

1: 8-IN OPEN VENT

24-IN

Pumping Rate: Suction Line: Receipt: Shell Man ways:

UNKNOWN

1:6-IN

1:4-IN

1:24-IN

1:36-IN

Leak Detection: Secondary Containment: Cathodic Protection: Insulation:

DIKE WITH LINER

YES

NONE

Shell Coatings: Roof Coatings: Bottom Coating:

EXTERNAL/INTERNAL

100%

100% EPOXY

EPOXY

BENICIA, CA 94510

Page 8 of 15 Date Printed: 3/8/13 1:24 PM

SHELL SETTLEMENT SURVEY

ft 14 28 42 0

Actual 0 0.00 0.02 0.00 0.00

Cosine 0.00 0.01 0.02 0.01 0.00

-0.01

0.00

0.01

0.01

0.02

0.02

0.03 S

et tl em en t (i n

Circumferential Distance (ft)

Base of Shell Elevation for 4 point Survey

The settlement for the tank is planer or roughly approximates the shape of a cosine curve.

The evaluation of this “out-of-levelness” or settlement, utilizing the criterion for “out-of-plane distortion” as described in API 653 Appendix B.3.2, indicates that the settlement is well within the acceptable limits.

Applicable Standards:

Shell settlement surveys were conducted in accordance with the requirements of API 653 Figure B-1. These surveys were evaluated in accordance with the API 653 Appendix B.2.2 and compared with the acceptance criteria outlined in API 653 Appendix B.3.2.

Note:

Calculation of maximum permissible S or out-of-plane distortion per API 653 Appendix B.3.2 was made using:

14.1 L < 32-ft OK

30,000 Y Survey Max 0.020 (ft)

29,000 E 0.24 (in)

16.0 H Curve Fit R^2 0.9994

Results: Allowable > Actual

Differential (ft) 0.071 > 0.020 Pass

(in) 0.853 > 0.240

Spacing Between (ft)

Tank Height (ft)

Modulas of Elasticity (ksi)

Allowable Stress (psi)

Curve Fit OK R^2>=90%

BENICIA, CA 94510

Page 9 of 15 Date Printed: 3/8/13 1:24 PM

SHELL THICKNESS CALCULATION

Find: Minimum shell thickness (t min) for each shell course utilizing the API 653 standard for tanks less than 200 ft dia.

Given:

Variable Identifier Description Value Reference

H Fill height (ft) 14.00 Measured from the base of each shell course (see column H in the table below) D Tank Diameter (ft) 18.00 G Specific Gravity 0.84 S Allow stress (psi) Varies Reference API 653 Table 4-1 E Joint Efficiency Varies Reference API 653 table 4.2 for Welded and 4.3 for Riveted construction M 1.00 Temp Modifier Varies Reference API 650 Appendix M Elevated temperature modifier

H E S Actual Solution

2.6 ( H - 1) DG

SEM

(in) (ft) (ft) % (psi) (in) (in) OK?

192.00 16.25

Shell Corrosion Rate Calculations API 653 6.3 © POWERS Engineering and Inspection, Inc. 2013

A B N RCA

Calculated Prev Current As Built Prev Current t min Previous Current

(yr) (yr) (yr) (in) (in) (in) (in) (in/yr) (in/yr) (in) (yr) (yr)

1 1979 2013 2013 0.188 0.188 0.188 0.100 0.00000 0.0000 0.0875 5 15 2 1979 2013 2013 0.188 0.188 0.188 0.100 0.00000 0.0000 0.0875 5 15

8 6.00

Type of Joint for each Course

Joint Eff API 653 Tbl

4.2 and 4.3

Material Type or Unknown

Welded or Riveted

Solution:

Table for Calculating minimum shell thickness (t min) for each shell course

Product Height Above Course

Maximum Allowable

Stress t min = Req'd t min

API 653 Required Calculation

Actual Vs

Req'd

C o u r s e

Height of each Course

API 653 4.3.3.1

Minimum Thickness for Course

85% Butt Weld 0.85 Welded Unknown 23,600 0.1000 0.1875 Ok

1 96.00 8 14.00 85% Butt Weld 0.85 Welded Unknown 23,600 2.6 x ( 14.00 - 1 ) x 18.00 x 0.84 ( 23,600 x 0.85 x 1.00)

0.1000 0.1875 Ok

2.6 x ( 6.00 - 1 ) x 18.00 x 0.84 ( 23,600 x 0.85 x 1.00)

2 96.00

Sum

RCA/4N Next External

API 653 6.3.2

RCA/2N Next

UT

Inspection

API 653 6.3.3

Date(s)

Year Built or

Replaced

Inspection Year Thickness

Measured

Corrosion Rate(s)

API 653 6.3.2.1

(A-B)

C o ur se

BENICIA, CA 94510

Page 10 of 15 Date Printed: 3/8/13 1:24 PM

SHELL ROLL-OUT

BENICIA, CA 94510

Page 11 of 15 Date Printed: 3/8/13 1:24 PM

CONE ROOF

EXTERNAL RAFTER

6-IN GOOSE NECK VENT

4-IN LAP PATCH

3-IN THREADED PLUG

ACCESS HATCH

3-IN THREADED BLIND

1 X 2-FT ROOF VENT

CAGED LADDER

20-IN MANWAY

4-IN RADAR UNIT

8-IN GAUGE HATCH

6-IN PV VENT

PLATFORM

8-IN OPEN VENT

6-IN GOOSE NECK VENT

4-IN LAP PATCH

3-IN THREADED PLUG

4-IN LAP PATCH

3-IN THREADED PLUG

1 X 2-FT ROOF VENT

BENICIA, CA 94510

Page 12 of 15 Date Printed: 3/8/13 1:24 PM

BOTTOM LAY-OUT

0.2 RTSS

8-IN GAUGE

POLE

4-IN GAUGE

POLE

SUMP

6-IN SUCTION

ANTI-ROTATION

DIFFUSER

1-IN TO 3-IN SUCTION

24-IN MANWAY

36-IN

MANWAY

2.5-IN ROOF LEGS

ANTI-ROTATION

BENICIA, CA 94510

Page 13 of 15 Date Printed: 3/8/13 1:24 PM

NEXT INSPECTION

Find: Bottom repair threshold criteria to permit return to service until the next inspection utilizing the API 653 4.4.5 MRT methodology

Given:

Variable Identifier

Minimum remaining thickness at the end of inspection interval, Or

In-service interval of operation (years to next internal Inspection) Or Not to exceed that allowed by API 653 6.4.2 Minimum remaining thickness from bottom side corrosion RTbc After repairs

Minimum remaining thickness from internal corrosion RTip After repairs Maximum rate of corrosion not repaired from internal corrosion StPr StPr = 0 for coated areas of the bottom If coating life < Or use Or

Maximum rate of corrosion not repaired on the bottom side UPr

Current Installation Age A Age of bottom (Inspection year - Installation year): 2013 1979 34 34 34

Expected Period until next inspection (years): 20 20 20

Bottom thickness Bottom CZ Annular

B Nominal thickness when bottom installed (in): 0.2500 0.2500 -

Minimum thickness (MRT) C Bottom away from CZ and Annular single bottom 0.100 0.125 - API 653 table 4-4, 4.4.5, and 4.4.6

Bottom Coating Estimated life of coating (years) 20 20 -

Repair criteria D Product side corrosion repair thickness RTip (in): 0.2000 0.2000 -

Pit Depth to be Repaired (in) 0.0500 0.0500 -

E Bottom side corrosion repair thickness RTbc (in): 0.1900 0.1900 -

F Minimum RTbc and RTip (in): 0.1900 0.1900 -

StPr = (B-D)/A 0.00147 0.00147 -

StPr = 0 if estimated life of bottom coating > 0r 0.00000 0.00000 - UPr = (B-E)/A 0.00176 0.00176 -

G StPr + UPr 0.00176 0.00176 -

Rewriting the MRT equation to solve for Or or the years until next inspection

Or = (F-C)/G 51.00000 36.83333 - 20.00

Solution:

1.) Repair all bottom plate pits deeper than 0.0500-in and all bottom plate soil side corrosion resulting in remaining thickness less than 0.1900-in.

2.) Apply or Maintain a coating system to provide product side corosion resistance until the next inspection.

Or= ((minimum of RTbc or RTip)-MRT)/(StPr+Upr)

MRT= (minimum of RTbc or RTip)-Or(StPr + Upr)

UPr = 0 for areas of bottom with effective Cathodic Protection UPr= MFE threshold or Minimum remaining thickness from bottom side corrosion after repairs.

To extend the period until next internal or bottom inspection 20 years or until the year 2033

'Or' min or 20 years

BENICIA, CA 94510

Page 14 of 15 Date Printed: 3/8/13 1:24 PM

SEISMIC

Tank Number: 1

Type Roof Tank (D)iameter (ft) 18.00

Tank (H)eight (ft) 16.00 Product fill Height (ft) 14.00 Hfill

Specific (G)ravity 0.84

Location: Latitude (deg) 36.134773 Longitude (deg) 86.668042

Spectral Response Factors Ss 0.47 47.10% USGS or UFC 3-101 -1 tbl F-2 S1 0.16 16.10% USGS or UFC 3-101 -1 tbl F-2 So 0.188 = Ss*0.4 for Mapped Methods

Site Coefficients Fa 1.423 API 650 Table E-1 Fv 2.16 API 650 Table E-2

Regional-dependant transition period TL 16 ASCE 7 maps Varies from 4 to 12 Sm1=Fv*S1 0.3471

Use Group Importance Factor (API 650 Tbl E-5) 1 Site Classification D Stiff Soil Table E-3 API 650 IBC 2009 table 1613.5.2

Seismic Use Group I SUI or I Use: group III essential, II public risk, or I

Thickness of Bottom under the shell (in) 0.2500 tb Calc'd 33.15 Width of Annular Plate (in) 33.15 L

API 650 Appendix M Temeprature Modifier 1.00 Tm Yield of Bottom Under Shell (psi) 30,000 Fby

Yield of 1st shell course (psi) 30,000 Fyield 1st Course

API 650 Allowable hoop stress for lower Shell (psi) 23,600 Sd Modulus of Elasticity (psi) 29,000,000 E

Snow Load (psf) 0 IBC 1608.4 or UFC 3-101 -1 tbl F-1

3-sec Gust Design Wind Velocity (mph) 120 V IBC 2009 fig 1609 or UFC 3-101 -1 tbl F-1

Solution:

Uplift ?

Compressive Stress ?

Wind Overturning for 120 mph wind?

5 Cone roof with internal aluminum floater

Wind Overturning OK for API 650. No anchors are required to resist wind overturning

API 650 11th Appendix E Calculations for Lat 36.13477 and Long 86.66804

No Seismic uplift is expected for fill heights < 14.00 (ft)

Good ! Calculated Seismic Compressive Stress is less than Allowable

Find: Product fill height for seismic loading utilizing API 650 11th edition Appendix E Methodology

BENICIA, CA 94510

Page 15 of 15 Date Printed: 3/8/13 1:24 PM

API 2000 VENTING CALCULATIONS

Find: Normal Out-Breathing and In-Breathing for non-frangible roof design utilizing the API 2000 methodology

Variable Identifier Description Value Reference or Formula

D Tank Diameter (ft) 18 H Shell height (ft) 16

Hfill Fill height (ft) 16.00 Type Product JP-8

Specific Gravity 0.84 Vapor Pressure (mm Hg at 20°C) 3 IERA-RS-BR-SR-2001-002 SwRI 03.40.50.03148.001

Vapor Pressuree (Fuel Oil, Diesel, Jet, Crude) Vapor pressure of Hexane is 130 mm Hg at 20 °C Flash Point (deg F) 100 37.78 (deg C) UFC 3-460-3

Operating Temperarure (deg F) 100 37.78 (deg C) UFC 3-460-2 Tv Simple Tank Volume (ft^3) 4,072 =0.25*H*pi*D^2

3. Fixed Roof with Open Vent Number of Vents on Roof 2

Calculations: Size of Vents on Roof (in) 6 OK Venting area >= 90% In/Out Size of Larger Product In/Out Nozzle (in) 6

Pressure Product In Flow Rate (bph) 1,000

Pifr (gpm) 700 C Hexane to product conversion factor 6.50 API 2000 table Ri Insulation Factor (1 for un-insulated tanks) 1.00 API 2000 table

Vop Out breathing due to liquid movement (CFH Air) 2,807 = 8.02*Pfr Vit Normal Out breathing due to Thermal (CFH Air) 6,734 = 3.08*C*Simple Tank Volume^(0.7)*Ri

Total Out breathing (CFH Air) 9,541 Per vent out Breathing (CFH Air) 4,771 Total/Number of Vents

Vacuum Product Pump Out Flow Rate (bph) 500

Pofr (gpm) 350 Y Latitude Factor 0.32 API 2000 table

Vip In breathing due to liquid movement (CFH Air) 5,614 if Temp < 104 deg F use 8.02 * Pofr else 8.02 * 1.005 * Pofr Vot Normal In breathing due to Thermal (CFH Air) 857 = 1.51*Y*Simple Tank Volume^(0.9)*Ri

Total Out breathing (CFH Air) 6,471 Per vent In Breathing (CFH Air) 3,235

Solution: Vent size 2 : 6 Open Vent 2 Total/Number of Vents

Type of Venting

APPENDIX A API 653 CHECKLIST

ENGINEERING & INSPECTION, INC

P.O. BOX 1928

BENICIA, CA 94510

TEL 707 334 3400 FAX 707 922 2284

API 653 Inspection Checklist

US AIR FORCE

CREECH AFB

Tank: TK 1

WWW.POWERSEI.COM

POWERS

Monday, February 25, 2013

Appendix A Page 1 of 13

© 2008 PE&I, Inc API 653 Appendix C Checklist

BENICIA, CA 94510

TEL 707 748 0540 FAX 707 922 2284

API 653 Inspection Checklist

US AIR FORCE

CREECH AFB

Tank: TK 1

WWW.POWERSEI.COM

POWERS

1.1 FOUNDATION

All See ReportC.1.1 Measure foundation levelness and bottom elevations (see Appendix B for extent of measurements).

Asphalt N/AC.1.1.2.a Check for settling of tank into asphalt base which would direct runoff rain water under the tank instead of away from it.

N/AC.1.1.2.b Look for areas where leaching of oil has left rock filler exposed, which indicates hydrocarbon leakage.

Concrete Ring OkC.1.1.1.a Inspect for broken concrete, spalling, and cracks, particularly under backup bars used in welding butt welded annular rings under the shell.

N/A Concrete FoundationC.1.1.1.b Inspect drain openings in ring, back of waterdraw basins and top surface of ring for indications of bottom leakage.

N/A Concrete FoundationC.1.1.1c Inspect for cavities under foundation and vegetation against bottom of tank.4

N/A Concrete FoundationC.1.1.1d Check that runoff rainwater from the shell drains away from tank.5

OkC.1.1.1e Check for settlement around perimeter of tank.6

Housekeeping OkC.1.1.6.a Inspect the area for buildup of trash, vegetation, and other inflammables buildup.13

Oiled Dirt or Sand N/AC.1.1.3.a Check for settlement into the base which would direct runoff rain water under the tank rather than away from it.

Rock N/AC.1.1.4.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.

Site Drainage OkC.1.1.5.a Check site for drainage away from the tank and associated piping and manifolds.11

NOT PERFORMEDC.1.1.5.b Check operating condition of the dike drains.12

1.2 SHELLS

External Visual Inspection

OkC.1.2.1.a Visually inspect for paint failures, pitting, and corrosion.14

OkC.1.2.1.b Clean off the bottom angle area and inspect for corrosion and thinning on plate and weld.15 ok - w/ isolated, holesC.1.2.1.c Inspect the bottom-to-foundation seal, if any.16

Internal (Floating Roof Tank) OkC.1.2.2.a Visually inspect for grooving, corrosion, pitting, and coating failures.17

Manways and Nozzles OkC.1.3.1.a Inspect for cracks or signs of leakage on weld joint at nozzles, manways, and reinforcing plates.26

Riveted Shell Inspection NOT RIVETEDC.1.2.3.a Inspect external surface for rivet and seam leaks18

NOT RIVETEDC.1.2.3.b Locate leaks by sketch or photo (location will be lost when shell is abrasive cleaned for painting).19

NOT RIVETEDC.1.2.3.c Inspect rivets for corrosion loss and wear20

NOT RIVETEDC.1.2.3.d Inspect vertical seams to see if they have been full fillet lap welded to increase joint efficiency21

NOT RIVETEDC.1.2.3.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.

Wind Girder (Floating Roof Tanks) N/AC.1.2.4.a Inspect windgirder and handraiI for corrosion damage (paint faiIure, pifting, corrosion product buildup), especially where it occurs at tack welded junction, and for broken welds.

N/AC.1.2.4.b Check support welds to shell for pitting, especially on shell plates.24

N/AC.1.2.4.c Note whether supports have reinforcing pads welded to shell.25

Monday, February 25, 2013

Appendix A Page 2 of 13

BENICIA, CA 94510

TEL 707 748 0540 FAX 707 922 2284

API 653 Inspection Checklist

US AIR FORCE

CREECH AFB

Tank: TK 1

WWW.POWERSEI.COM

POWERS

1.3 SHELL APPURTENANCES

Autogauge System OkC.1.3.3.a Inspect autogauge tape guide and lower sheave housing (floating swings) for leaks39

OkC.1.3.3.b Inspect autogauge head for damage40

NAC.1.3.3.c Bump the checker on autogauge head for proper movement of tape.41

OkC.1.3.3.d Identify size and construction material of autogauge tape guide (floating roof tanks).42

NAC.1.3.3.e Ask operator if tape tends to hang up during tank roof movement (floating roof tanks).43

NOT PERFORMEDC.1.3.3.f Compare actual product level to the reading on the autogauge (maximum variation is 2 inches).44

NOT PERFORMEDC.1.3.3.g On floating roof tanks, when the roof is in the lowest position, check that no more than two feet of tape are exposed at the end of the tape guide.

N/AC.1.3.3.h Inspect condition of board and legibility of board-type autogauges.46

N/AC.1.3.3.i Test freedom of movement of marker and float.47

Heater (Shell Manway Mounted) N/AC.1.3.5.a Inspect condensate drain for presence of oil indicating leakage51

Manways and Nozzles Ok - minor distortion near Inlet piping

C.1.3.1.b Inspect for shell plate dimpling around nozzles, caused by excessive pipe deflection.27

OkC.1.3.1.c Inspect for flange leaks and leaks around bolting.28

N/AC.1.3.1.d Inspect sealing of insulation around manways and nozzles.29

N/AC.1.3.1.e Check for inadequate manway flange and cover thickness on mixer manways.30

Mixer N/AC.1.3.6.a Inspect for proper mounting flange and support.52

N/AC.1.3.6.b Inspect for leakage.53

N/AC.1.3.6.c Inspect condition of power lines and connections to mixer.54

Shell-Mounted Sample Station NOT PERFORMEDC.1.3.4.a Inspect sample lines for function of valves and plugging of lines, including drain or return-to-tank line.

NOT PERFORMEDC.1.3.4.b Check circulation pump for leaks and operating problems.49

N/AC.1.3.4.c Test bracing and supports for sample lines and equipment.50

Swing Lines: Cable Material and Condition N/AC.1.3.10.a For non-stainless steel cable, check for corrosion over entire length.60

N/AC.1.3.10.b All cable: check for wear or fraying.61

Swing Lines: External Guide System N/AC.1.3.8.a Check for leaks at threaded and flanged joints.58

Swing Lines: Identify Ballast Varying Need N/AC.1.3.9.a Check for significant difference in stock specific gravity.59

Swing lines: Product Sample Comparison N/AC.1.3.11.a Check for water or gravity differences that would indicate a leaking swing joint.62

Swing Lines: Target N/AC.1.3.12.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.

Swing Lines: Winch Operation NOT PERFORMEDC.1.3.7.a Non floating. Raise, then lower the swing line with the winch, and check for cable tightness to confirm that swing line lowered properly.

N/AC.1.3.7.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.

N/AC.1.3.7.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.

Tank Piping Manifolds OkC.1.3.2.a Inspect manifold piping, flanges, and valves for leaks.31

Monday, February 25, 2013

Appendix A Page 3 of 13

BENICIA, CA 94510

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API 653 Inspection Checklist

US AIR FORCE

CREECH AFB

Tank: TK 1

WWW.POWERSEI.COM

POWERS

naC.1.3.2.b Inspect fire fighting system components32

OkC.1.3.2.c Check for anchored piping which would be hazardous to the tank shell or bottom connections during earth movement.

OkC.1.3.2.d Check for adequate thermal pressure relief of piping to the tank.34

N/AC.1.3.2.e Check operation of regulators for tanks with purge gas systems.35

OkC.1.3.2.f Check sample connections for leaks and for proper valve operation36

Not performedC.1.3.2.g Check for damage and test the accuracy of temperature indicators.37

N/AC.1.3.2.h Check welds on shell-mounted davit clips above valves 6 inches and larger.38

1.4 ROOFS

Deck Plate External Corrosion OK - Minor isolated cracking present

C.1.4.2.a Visually inspect for paint failure, holes, pitting, and corrosion product on the roof deck.65

Deck Plate Internal Corrosion OkC.1.4.1.a 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 raft

Floating Roof Seal Systems NOT PERFORMEDC.1.4.7.a Measure and record maximum seal-to-shell gaps at: 1.Low pump out. 2. Mid-shell. 3.High liquid level.

1. 7-in, 3-in, 2. 7-in 4-inC.1.4.7.b Measure and record annular space at 30 foot spacing (minimum of four quadrants) around roof and record. Measurements should be taken in directly opposite pairs. 1.Opposite pair 1. 2.

Opposite pair 2.

OkC.1.4.7.c Check if seal fabric on primary shoe seals is pulling shoes away from shell (fabric not wide enough).

Significant deterioration presentC.1.4.7.d Inspect fabric for deterioration, holes, tears, and cracks.75

OkC.1.4.7.e Inspect visible metallic parts for corrosion and wear.76

ObscuredC.1.4.7.f Inspect for openings in seals that would permit vapor emissions.77

OkC.1.4.7.g Inspect for protruding bolt or rivet heads against the shell.78

Both seals in need of replacementC.1.4.7.h Pull both primary and secondary seal systems back all around the shell to check their operation.79

OkC.1.4.7.I Inspect secondary seals for signs of buckling or indications that their angle with the shell is too shallow.

Seals have failed. In need of replacement

C.1.4.7.j Inspect wedge-type wiper seals for flexibility, resilience, cracks, and tears.81

Internal Floating Roof Minor product presentC.1.4.5.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.

Level of Floating Roof OkC.1.4.4.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

Roof Deck Drainage OkC.1.4.3.a 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

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

N/AC.1.4.6.b Inspect for wet insulation under the weather coat.70

N/AC.1.4.6.c Remove small test sections of insulation and check roof deck for corrosion and holes near the edge of the insulated area.

1.5 ROOF APPURTENANCES

Autogauge: Float Well Cover

N/AC.1.5.5.a Inspect for corrosion.98

NAC.1.5.5.b Check tape cable for wear or fraying caused by rubbing on the cover.99 Monday, February 25, 2013

Appendix A Page 4 of 13

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API 653 Inspection Checklist

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CREECH AFB

Tank: TK 1

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Autogauge: Inspection Hatch and Guides (Fixed Roof)

OkC.1.5.4.a Check the hatch for corrosion and missing bolts.96

NAC.1.5.4.b Look for corrosion on the tape guide's and float guides wire anchors.97

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

Fixed Roof Scaffold Support NAC.1.5.3.a Inspect scaffold support for corrosion, wear, and structural soundness.95

Gauge Well OkC.1.5.2.a Inspect visible portion of the gauge well for thinning, size of slots, and cover condition90

OkC.1.5.2.b Check for a hold off distance marker and tab with hold off distance (legible).91

OkC.1.5.2.c On floating roofs, inspect condition of roof guide for gauge well, particularly the condition of the rollers for grooving.

Not PerformedC.1.5.2.d If accessible, check the distance from the gauge well pipe to the tank shell at different levels.93

OkC.1.5.2.e If tank has a gauge well washer, check valve for leakage and for presence of a bull plug or blind flange.

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

Pontoon Inspection Hatches N/AC.1.5.13.a Open pontoon inspection hatch covers and visually check inside for pontoon leakage.110

N/AC.1.5.13.b Test for explosive gas (an indicator of vapor space leaks).111

N/AC.1.5.13.c If pontoon hatches are equipped with locked down coves, check for vent tubes.Check that vent tubes are not plugged up. Inspect lock down devices for condition and operation

Removable Roof Leg Racks N/AC.1.5.10.a Check for leg racks on roof.106

Rim Vents N/AC.1.5.12.a Check condition of the screen on the rim vent cover.108

N/AC.1.5.12.b Check for plating off or removal of rim vents where jurisdictional rules do not permit removal.109

Roof-Mounted Vents (internal Floating Roof) N/AC.1.5.7.a Check condition of screens, locking and pivot pins.103

Sample Hatch OkC.1.5.1.a Inspect condition and functioning of sample hatch cover.82

OkC.1.5.1.b On tanks governed by Air Quality Monitoring District rules, check for the condition of seal inside hatch cover.

OkC.1.5.1.c Check for corrosion and plugging on thief and gauge hatch cover.84

OkC.1.5.1.d Where sample hatch is used to reel gauge stock level, check for marker and tab stating hold off distance.

OkC.1.5.1.e Check for reinforcing pad where sample hatch pipe penetrates the roof deck.86

OkC.1.5.1.f On floating roof sample hatch and recoil systems, inspect operation of recoil reel and condition of rope.

OkC.1.5.1.g Test operation of system.88

OkC.1.5.1.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).

Sample Hatch (internal Floating Roof) OkC.1.5.6.a Check overall conditions.100

OkC.1.5.6.b When equipped with a fabric seal, check for automatic sealing after sampling.101

OkC.1.5.6.c When equipped with a recoil reel opening device, check for proper operations102

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

Monday, February 25, 2013

Appendix A Page 5 of 13

BENICIA, CA 94510

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API 653 Inspection Checklist

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CREECH AFB

Tank: TK 1

WWW.POWERSEI.COM

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1.6 ACCESS STRUCTURES

Deck Plate and Grating OkC.2.12.3.a Inspect deck plate for corrosion-caused thinning or holes (not drain holes) and paint failure.124

OkC.2.12.3.b Inspect plate-to-frame weld for rust scale buildup.125

OkC.2.12.3.c Inspect grating for corrosion-caused thinning of bars and failure of welds126

OkC.2.12.3.d Check grating tie down clips. Where grating has been retrofitted to replace plate,127

Handrails Pipe and Angle member handrails present

C.2.12.1.a Identify and report type (steel pipe, galvanized pipe, square tube, angle) and size of handrails.113

OkC.2.12.1.b Inspect for pitting and holes, paint failure.114 obscuredC.2.12.1.c Inspect attachment welds.115

OkC.2.12.1.d Identify cold joints and sharp edges. Inspect the handrails and midrails116 none presentC.2.12.1.e Inspect safety drop bar (or safety chain) for corrosion, functioning, and length.117

NAC.2.12.1.f Inspect the handrail between the rolling ladder and the gaging platform for a hazardous opening when the floating roof is at its lowest level.

Platform Frame OkC.2.12.2.a Inspect frame for corrosion and paint failure.119

OkC.2.12.2.b Inspect the attachment of frame to supports and supports to tank for corrosion and weld failure.120

OkC.2.12.2.c Check reinforcing pads where supports are attached to shell or roof.121

OkC.2.12.2.d Inspect the surface that deck plate or grating rests on, for thinning and holes.122

OkC.2.12.2.e Check that flat-surface to flat-surface junctures reseal welded.123

Rolling Ladder N/AC.2.12.5.a Inspect rolling ladder stringers for corrosion.131

N/AC.2.12.5.b Identify and inspect ladder fixed rungs (square bar, round bar, angles) for weld attachment to stringers and corrosion, particularly where angle rungs are welded to stringers

N/AC.2.12.5.c Check for wear and corrosion where rolling ladder attaches to gauging platform.133

N/AC.2.12.5.d Inspect pivot bar for wear and secureness.134

N/AC.2.12.5.e Inspect operation of self-leveling stairway treads.135

N/AC.2.12.5.f Inspect for corrosion and wear on moving parts.136

N/AC.2.12.5.g Inspect rolling ladder wheels for freedom of movement, flat spots, and wear on axle.137

N/AC.2.12.5.h Inspect alignment of rolling ladder with roof rack.138

N/AC.2.12.5.i Inspect top surface of rolling ladder track for wear by wheels to assure at least 18 inches of unworn track (track long enough).

N/AC.2.12.5.j Inspect rolling ladder track welds for corrosion.140

N/AC.2.12.5.k Inspect track supports on roof for reinforcing pads seal welded to deck plate.141

N/AC.2.12.5.l Check by dimensioning, the maximum angle of the rolling ladder when the roof is on low legs.142

N/AC.2.12.5.m If rolling ladder track extends to within five feet of the edge of the roof on the far side, check for a handrail on the top of the shell on that side. Max. angle

Stairway Stringers NAC.2.12.4.a Inspect spiral stairway stringers for corrosion, paint failure, and weld failure. Inspect attachment of stairway treads to stringer.

NAC.2.12.4.b Inspect stairway supports to shell welds and reinforcing pads.129

NAC.2.12.4.c Inspect steel support attachment to concrete base for corrosion.130

2.10 OVERVIEW

Safety OkC.2.1.a Check that tank has been cleaned, is gas free, and safe for entry.144

OkC.2.1.b Check that the tank is completely isolated from product lines, all electrical power, and steam lines.145

OkC.2.1.c Check that roof is adequately supported, including fixed roof structure and floating roof legs146

OkC.2.1.d Check for presence of failing object hazards, such as corroded-through roof rafters, asphalt stalactites, and trapped hydrocarbons in unopened or plugged equipment or appurtenances, ledges, etc.

OkC.2.1.e Inspect for slipping hazards on the bottom and roof decks.148

Monday, February 25, 2013

Appendix A Page 6 of 13

BENICIA, CA 94510

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API 653 Inspection Checklist

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Tank: TK 1

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OkC.2.1.f Inspect structural welds on accessways and clips149 none presentC.2.1.g Check surfaces needing inspection for a heavy-scale buildup and check weld seams and oily surfaces where welding is to be done. Note areas needing more cleaning, including blasting.

2.12 TANK EXTERIOR

Inspection OkC.2.2.a Inspect appurtenances opened during cleaning such as lower floating swing sheave assemblies, nozzle interiors (after removal of valves).

OkC.2.2.b Hammer test or ultrasonically test the roof.152

N/AC.2.2.c Enter and inspect the floating roof pontoon compartments.153

2.13 BOTTOM INTERIOR SURFACE

Inspection OkC.2.3.a Using a flashlight held close to and parallel to the bottom plates, and using the bottom plate layout as a guide, visually inspect and hammer test the entire bottom.

None presentC.2.3.b Measure the depth of pitting and describe the pitting appearance (sharp edged, lake type, dense, scattered, etc.)

One area with RT-SS 0.20-in marked for lap patch repair

C.2.3.c Mark areas requiring patching or further inspection.156

None presentC.2.3.d Mark locations for turning coupons for inspection.157

OkC.2.3.e Inspect all welds for corrosion and leaks, particularly the shell-to-bottom weld.158

OkC.2.3.f Inspect sketch plates for corrosion.159

None presentC.2.3.g Locate and mark voids under the bottom.160

See ReportC.2.3.h Record bottom data on a layout sketch using the existing bottom plates as a grid. List the number and sizes of patches required.

Not PerformedC.2.3.i Vacuum test the bottom lap welds.162

OkC.2.3.j Hammer test or ultrasonically examine any slightly discolored spots or damp areas.163

OkC.2.3.k Check for reinforcing pads under all bottom attached clips, brackets, and supports164

OkC.2.3.l Inspect floating roof leg pads for pitting or cutting, and excessive dimpling (indicating excessive loading).

OkC.2.3.m Check the column bases of fixed roof supports for adequate pads and restraining clips.166

OkC.2.3.n In earthquake zones 3 and 4, check that roof supports are not welded down to the tank bottom, but are only restrained from horizontal movement.

N/AC.2.3.o Check area beneath swing line cable for indications of cable cutting or dragging.168

N/AC.2.3.p Mark old oil and air test connection for removal and patching.169

None presentC.2.3.q Identify and report low areas on the bottom that do not drain adequately.170

OkC.2.3.r Inspect coating for holes, disbanding, deterioration, and discolorization.171

2.14 SHELL SEAMS AND PLATE

Inspection

NAC.2.4.a On cone up bottoms, closely inspect and gauge the depth of metal loss on the lower 2 to 4 inches of the shell (area of standing water).

OkC.2.4.b Measure the depth of pitting on each course.173

NAC.2.4.c Inspect and estimate the amount of metal loss on the heads of rivets and bolts174

N/AC.2.4.d Inspect shell-to-bottom riveted lap joints.175

N/AC.2.4.e Inspect for vertical grooving damage from seal assembly protrusions.176

OkC.2.4.f Inspect existing protective coatings for damage, deterioration, and disbonding177

Seals reported to catch on 36-in manway weld seams

C.2.4.g Check for areas of rubbing (indicating too much pressure by the seal assembly shoes or inadequate annular space).

OkC.2.4.h Visually inspect the shell plates and seams for indications of leakage. If the shell has riveted or bolted seams, record the leak locations by film or chart in case the locations are lost during surface preparation for painting

OkC.2.4.i Measure annular space at 40-foot intervals.180

OkC.2.4.j Survey the shell to check for roundness and plumb.181

2.15 SHELL-MOUNTED OVERFLOWS

Inspection

Monday, February 25, 2013

Appendix A Page 7 of 13

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API 653 Inspection Checklist

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Tank: TK 1

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OkC.2.5.a Inspect overflow for corrosion and adequate screening.182

N/AC.2.5.b Check location of overflow that it is not above any tank valves or equipment.183

2.16 ROOF INTERIOR SURFACE

Fixed Roof Support Structure N/AC.2.6.2.a Check for loose or twisted rafters.195

NAC.2.6.2.a Inspect the support columns for thinning in the upper two feet.190

OkC.2.6.2.b Inspect girders for thinning and check that they are attached securely to the top of the columns.196

N/AC.2.6.2.b On API columns (two channels welded together) check for corrosion scale breaking the tack welds, unless the joint between the channels is completely seal welded.

N/AC.2.6.2.c Report if the columns have cross bracing in the area between the low pump out of the top of the shell (for future internal floating roof installation).

N/AC.2.6.2.c Check that the reinforcing pad on the bottom is seal welded to the tank bottom with horizontal movement restraining clips welded to the pad.

N/AC.2.6.2.d Inspect and report presence of any roof-mounted swing line bumpers.198

N/AC.2.6.2.d Determine if pipe column supports are concrete filled or open pipe. If open pipe, check for a drain opening in the bottom of the pipe

OkC.2.6.2.e Photograph the roof structure if no rafter layout drawing exists.199

N/AC.2.6.2.e Inspect and gauge rafters for thinning, particularly near the center of the roof. Report metal loss.194

General N/AC.2.6.1.a Visually inspect the underside surface of the roof plates for holes, scale buildup, and pitting.184

Not performedC.2.6.1.b Hammer test or ultrasonically examine to check for thin areas, particularly in the vapor space of floating roofs and at edge of roof on cone roof tank.

OkC.2.6.1.c Check all clips, brackets, braces, etc., welded to the roof deck plate for welded reinforcing pads and see that they have not broken free.

Not performedC.2.6.1.d If no pad is present, penetrant test for cracking of the weld or deck plate.187

OkC.2.6.1.e Inspect for protective coating for breaks, disbandment, and deterioration188

Not performedC.2.6.1.f Spark test the interior surface coating if recoating is not planned.189

2.17 FIXED ROOF APPURTENANCES

Breathers and Vents

Not performedC.2.7.3.a Inspect and service the breather.205

OkC.2.7.3.b Inspect screens on vents and breathers.206

Emergency PN Hatches Not performedC.2.7.4.a Inspect and service pressure/vacuum hatches. (Setting should be high enough to prevent chattering of breather during normal operation. See breather manufacturer's guide,)

OkC.2.7.4.b Inspect liquid seal hatches for corrosion and proper liquid level in the seal.208

Inspection and Light Hatches N/AC.2.7.1.a Inspect the hatches for corrosion, paint and coating failures, holes, and cover sealing.200

N/AC.2.7.1.b On loose covers, check for a safety chain in good condition.201

N/AC.2.7.1.c On light hatches over 30 inches across, check for safety rods202

NAC.2.7.1.d Inspect the condition of the gaskets on bold or latched down hatch covers.203

Sample Hatch OkC.2.7.5.a Inspect sample hatch for corrosion.209

OkC.2.7.5.b Check that the cover operates properly210

N/AC.2.7.5.c If the tank has no gauge well, check for a hold off distance marker and check measurement.211

Staging Support Connection OkC.2.7.2.a Inspect the condition of the staging support for corrosion.204

2.18 FLOATING ROOF

Floating Roof Cutouts

NAC.2.8.3.a Inspect underside of cutouts for mechanical damage.220

OkC.2.8.3.b Inspect welds for cracks.221

OkC.2.8.3.c Inspect plate for thinning, pitting, and erosion.222

Monday, February 25, 2013

Appendix A Page 8 of 13

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API 653 Inspection Checklist

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Tank: TK 1

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NAC.2.8.3.d Measure mixer cutouts and record plate thickness for future mixer installation or replacement.

Plate thickness

Floating Roof Pontoons NAC.2.8.2.a Visually inspect each pontoon for liquid leakage.216

NAC.2.8.2.b Run a light wire through the goose neck vents on locked down inspection hatch covers to make sure they are open.

OkC.2.8.2.c Inspect lockdown latches on each cover.218

NAC.2.8.2.d Check and report if each pontoon is:1.Vapor tight (bulkhead seal welded on one side on bottom, sides, and top), 2.Liquid tight seal welded on bottom and sides only), or 3. Unacceptable (minimum acceptable condition is liquid tight).

Floating Roof Supports OkC.2.8.4.a inspect fixed low and removable high floating roof legs for thinning.224

OkC.2.8.4.b Inspect for notching at bottom of legs for drainage225

OkC.2.8.4.c Inspect for leg buckling or felling at bottom.226

OkC.2.8.4.d Inspect pin hole in roof guide for tears.227

OkC.2.8.4.f Check plumb of all legs.228

OkC.2.8.4.g Inspect for adequate reinforcing gussets on all legs through a single portion of the roof.229

OkC.2.8.4.h Inspect the area around the roof legs for cracking if there is no internal reinforcing pad or if the topside pad is not welded to the deck plate on the underside.

OkC.2.8.4.I Inspect the sealing system on the two-position legs and the vapor plugs in the fixed low leg for deterioration of the gaskets.

OkC.2.8.4.j On shell mounted roof supports, check for adequate clearance based on the maximum floating roof movement as determined by the position of the roof relative to the gauge well and/or counter rotational device.

Roof Deck N/AC.2.8.1.a Hammer test the area between roof rim and shell. (If access for hammer testing is inadequate, measure the distance from the bottom edge of the roof to the corroded area and then hammer test from inside the pontoon.)

N/AC.2.8.1.b In sour water service, clean and test all deck plate weld seams for cracking unless the lower laps have been seal welded.

N/AC.2.8.1.c Check that either the roof drain is open or the drain plug in the roof is open in case of unexpected rain

OkC.2.8.1.d On flat bottomed and cone bottom roof decks, check for a vapor dam around the periphery of the roof. The dam should be continuous without break to prevent escape of vapors to the seal area from under the center of the roof.

2.19 FLOATING ROOF SEAL ASSEMBLIES

Primary Shoe Assembly

Not performedC.2.9.1.a Remove four sections of foam log (foam filled seals) for inspection on 90' locations.233

NAC.2.9.1.b Inspect hanger attachment to roof rim for thinning, bending, broken welds, and wear of pin holes.234

NAC.2.9.1.c Inspect clips welded to roof rim for thinning.235

OkC.2.