Attachment K.1 - Dobbins-Fac 2015A (Tank 1)-2015.pdf

SUMMARY OF INSPECTION

RECOMMENDATIONS

API 653, Tank Inspect and Repair, Tank Group #16

Dobbins ARB, GA – Tank 2015A

Prepared for:

U.S. Army Corps of Engineers

(USACE)

Prepared by:

Weston Solutions, Inc.

1435 Garrison Street

Suite 100 Lakewood, CO 80215

Contract Number: W9128F-10-D-0072 Task Order Number: 0004

February 2015

Dobbins AFB Tank 2015A Page 1 of 6

Storage Tank No. 2015A

SUMMARY OF INSPECTION RECOMMENDATIONS

API 653 Out-of-Service Tank Inspection Contract No. W9128F-10-D-0072 / TO0004

Dobbins AFB, GA

Tank No. 2015A was inspected January 30, 2015. An API 653 out-of-service inspection was performed by Powers Engineering & Inspection, Inc. for Weston Solutions, Inc. (WESTON), under contract to United States Army Corps of Engineers (USACE).

TANK DATA

Diameter 25’- 0” Height 24’- 0” Nominal Capacity 17,500 Barrels Product Stored Jet A Construction Field-erected vertical welded steel AST with shell extension and cap Built 1954 Construction Std. API 12C 11th Edition Foundation Concrete ringwall

INSPECTION

Type API 653 out-of-service Shell UT thickness and visual inspection Bottom MFE scan, UT thickness and visual inspection Roof UT thickness and visual inspection General General visual inspection and settlement survey

INSPECTION INTERVALS

UFC 3-460-03 require API 653 out of-service inspection every 10 years. In-service and out-of-service inspection intervals allowable per API 653 will be included in the final inspection report.

Inspection Type Interval Complete no later than:

API In-Service (external) 5 years January 2020 UFC Out-of-Service (internal) 10 years January 2025 API Out-of-Service 20 Years January 2035 g6edxaja Sticky Note Installation confirms this tank is only 82,000 Gallons

Dobbins AFB Tank 2015A Page 2 of 6

MANDATORY RECOMMENDATIONS

Mandatory items are repairs or other actions necessary to preserve or restore the structural or hydraulic integrity of the tank, or to comply with applicable codes, standards and regulations.

1. 6-inch issue, 6-inch receipt, two 36-inch manways with thickened inserts, and 2-inch low suction shell nozzles were not relocated at the time of previously installed new double tank bottom. Nozzle centerlines to bottom heights and minimum nozzle neck thicknesses are not IAW API 650 Table 5-6b; and shell reinforcement pad thicknesses are not IAW API 650 Para. 5.7.2.

Remove all shell nozzles and provide shell insert plates with new nozzles and reinforcement plates IAW API 650 Table 5-6b and API 650 Para. 5.7.2, realign all exterior piping to new shell nozzle centerline elevations and perform required hydrostatic test IAW API 653 Para. 12.3 (See Also Mandatory Recommendation 6).

2. External 6-inch issue and receipt lines thermal pressure relief piping contains welds connecting carbon steel to stainless steel, a check valve connected flange face to flange face with pressure relief valve and ball valve, and the carbon steel pressure relief valve is oriented horizontally.

Remove 1-inch Class 150 check valves and remove and replace 6-inch issue and receipt line thermal pressure relief valves and piping IAW AW 78-24-27 Drawing Sheet D.10/Detail A3. (See Photo Log Photo 8 and 18)

3. External 6-inch reduced port ball valve, High Level Control Valve and 6-inch DB& B valve on the 6-inch receipt line are flanged flange face to flange face not allowing thermal pressure relief piping connection between the valves and connection to the thermal relief piping.

Reconfigure 6-inch receipt piping to allow flange by flange spools to be inserted between the three valves and connections with the thermal pressure relief line IAW AW 78-24-27 Drawing Sheet D.12/Detail A1 and AW 78-24-27 Drawing Sheet D.10/Detail A3. (See Photo Log Photo 8)

4. Internal floating roof penetration gaskets have failed.

Replace all penetration gaskets on the internal floating roof.

5. Internal floating roof foam seals were removed during inspection Replace internal floating roof foam seals with double wiper seal.

6. After all tank repairs are complete, perform hydrostatic test.

Perform hydrostatic test IAW API 653 Para. 12.3.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: ? - API 653, para. 9.10.2.7 allows existing shell penetrations need not be raised if the certain conditions stated in the paragraph are met. Contractor is to verify whether or not this tank meets these conditions. Otherwise, the penetrations will have to be moved to accommodate API 650/653.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Concur, if Mandatory Recommendation #1 is performed.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Concur, in SOW.

g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Concur, in SOW.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Non-concur. Flange spools have been removed from latest update to DoD AST standard.

g6cdxmdc Sticky Note SP-C: POL-TCX review

POL-TCX: Concur

Dobbins AFB Tank 2015A Page 3 of 6

NEAR TERM RECOMMENDATIONS

Near-Term recommendations are repairs and upgrades based on good engineering and maintenance practices or compliance with policy or criteria.

7. External water draw off pipe supports to product saver tank are uni-struts fastened to the secondary containment bottom.

Provide external pipe supports for water draw off piping IAW UFC 3-460-01 Para. 9-3.2 and ANSI/ASME B31.4. (See Photo Log Photo 10)

8. Existing pipe support underneath internal 6-inch receipt diffuser is not adjustable and does not have a pipe support near the tank shell IAW AW 78-24-27.

Recommend to remove existing pipe support and install two pipe supports IAW AW 78-24- 27 Drawing Sheet D.08/Detail C1. (See Photo Log Photo 1)

9. 6-inch receipt pipe support attachment to concrete foundation is cracked and pipe support is missing base anchor bolts.

Recommend to remove broken concrete foundation and provide new yoke type stanchion pipe support and concrete anchors. (See Photo Log Photo 11)

10. Three internal shell mounted centering bazookas require manual positioning and are not centered correctly in proportion to the shell mounted IFR guide bar.

Remove three bazookas and provide new spring loaded bazookas mounted at 90°, 180° and 270° from shell mounted IFR guide bar. (See Photo Log Photo 13)

11. Spiral stairway handrail height is 26-inches and the stairway tread at the high levels has been trimmed for access of the high level controls not IAW 29 CFR Section 1926.1052.

Recommend to remove and replace spiral stairway IAW 29 CFR Section 1926.1052. (See Photo Log Photo 15)

12. Level gauge is inoperable.

Repair or replace inoperable level gauge.

13. Five tank grounds consist of a bolted connection to tank shell and do not have reinforcement plates under the ground lug. The ground wires are not exothermically welded to the grounding lug IAW API 650 and AW 78-24-27.

Recommend to remove and provide tank grounding IAW AW 78-24-27 Drawing Sheet D.14/Detail C4. (See Photo Log Photo 12)

14. 8-inch manual stilling well top is open ended and has instrumentation cabling entering stilling well thru open top that is not IAW NFPA 70.

Provide top flange and blind flange with threaded conduit assembly IAW NFPA 70. (See Photo Log Photo 14)

15. Bird screen on existing shell roof and roof extension has failed.

Replace bird screen to prevent access to internal roof area.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Install one new pipe support near tank shell. Existing pipe supports may remain as-is.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Non-concur; The pipe supports referenced in the UFC are for larger pipes not small bore pipes. Provide small bore pipe supports similar to the attached detail.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Concur. Ensure a new concrete base is provided to embed concrete anchors into. Do not embed into containment dike slab as concrete may not be thick enough to accommodate anchorage and damage to liner beneath concrete could occur.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Non-concur, leave as-is. Otherwise, the contractor will have to test that the grounding system works after repairs to ensure that the tank is properly grounded.

g6cdxmdc Sticky Note SP-C: POL-TCX review

POL-TCX: Concur g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Automatic tank gauging system shall be modified to reflect the configuration shown on Detail A1/D.07 of the DoD AST Standard AW 78-24-27.

g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Remove and replace stair railings to comply with OSHA 1910.23. Modify treads at alarms to ensure 22" tread length betwen obstruction and railing.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Replace Manual Tape Level Gauge.

g6cdxmdc Sticky Note SP-C: Nonconcur

POL-TCX: Concur, replace with SS bird screen.

Dobbins AFB Tank 2015A Page 4 of 6

16. Internal bottom reinforcing plates underneath each of the three 3-inch Internal Floating Roof

Legs (IFRs) have coating failure.

Recoat underneath each of the three 3-inch IFR legs IAW UFGS 09 97 13.17. (See Photo Log Photo 6)

17. Bottom of internal floating roof contains 600 SF of coating failure.

Recoat areas of internal corrosion and coating failure IAW UFGS 09 97 13.17 or other approved coating specifications.

18. Entire internal shell extension rafters contains corrosion and coating failure.

Remove internal corrosion and coating failures and recoat all internal shell rafters IAW UFGS 09 97 13.17 or other approved coating specifications. (See Photo Log Photo 17)

19. External 6-inch issue and receipt piping has 1500 SF of coating failures.

Recoat areas of external coating failure IAW UFGS 09 97 13.27 or other approved coating specifications. (See Photo Log Photo 18)

20. The sealant installed between the concrete ringwall foundation and tank bottom has failed.

Install backer rod and a fuel resistant sealant on entire circumference of concrete ringwall to concrete foundation joints, approximately 80 LF.

21. Sealant on concrete containment dike bottom joint seals has failed.

Install backer road and a fuel resistant sealant on approximately 200 LF of the concrete dike bottom joint seals.

LONG TERM RECOMMENDATIONS

Repairs and upgrades intended to extend the service life of the tank, ensure continued compliance with codes, standards and regulations, and discretionary improvements. .

22. Continue providing API 653 inspection at required intervals.

Provide in accordance with API 653, and Service Headquarters policy.

23. Abandoned internal floating roof water drain and assembly has been disconnected.

Remove unused internal floating roof water drain and assembly. (See Photo Log Photo 3)

24. External shell external roof drain line and anti-rotation piping are abandoned in place.

Recommend to remove unused abandoned shell roof drain line and anti-rotation piping.

25. Tank API 653 tank identification plate is illegible.

Provide tank identification plate IAW API 653 Figure 13.

RECOMMENDED REPAIRS FOR NON-COMPLIANCE WITH DoD STANDARDS Repairs and upgrades based on UFC 3-460-01, UFGS, AW 78-24-27 and DoD standards, practices or compliance with policy or criteria.

26. 6-inch internal receipt piping and internal diffuser contains rust on the interior of the diffuser.

Recommend to provide internal coating of receipt diffuser and receipt piping IAW UFGS 33 56 13.13 “Steel Tanks with Fixed Roofs” Para 2.1.1. (See Photo Log Photo 1) g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Concur g6cdxmdc Sticky Note SP-C: Nonconcur

POL-TCX: Concur.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur g6cdxmdc Sticky Note SP-C: POL-TCX review

POL-TCX: Concur. Seal weld top and bottom penetrations to prevent water infiltration beneath g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur. The joints shall be sealed utilizing silicone sealant meeting ASTM D5893; grade shall be NS (non-sag).

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Concur g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Provide Buna-N Gasket and polysulfide mastic sealant caulk. Backer rod material will pull out over time and shall not be used.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Concur, UFGS 09 97 13.15 shall be used. No other coating specification shall be used.

g6edxncd Line

Dobbins AFB Tank 2015A Page 5 of 6

27. 6-inch issue line downturn elbow with anti-vortex plate is located in close proximity to the sump and internal issue pipe supports are not IAW AW 78-24-27.

Recommend to cut and remove 6-inch issue pipe and downturn elbow with anti-vortex plate to half the radius of the tank (6.25 Feet) IAW AW 78-24-27 Drawing Sheet D.08/Sheet A1), remove and replace one internal support and supply second support IAW AW 78-24-27 Drawing Sheet D.08/Details A4. (See Photo Log Photo 2)

28. Existing 8-inch manual stilling well is not fully slotted along the upper top portion of the stilling well.

Recommend to fully slot 8-inch manual stilling well IAW AW 78-24-27 Drawing Sheet D.07/Detail C3. (See Photo Log Photo 4)

29. Existing 8-inch manual aluminum stilling well bottom guides is restrained by attachment to carbon steel bottom mounting plate and reinforcing mounting plate is not IAW spacing requirement s of API 653 Figure 9.13.

Recommend disconnecting bottom mounting plate and stilling well bottom guide welds connection with dissimilar metals and provide new bottom mounting pad and stilling well bottom attachment IAW 78-24-27 Drawing Sheet D.07/Detail C3. (See Photo Log Photo 5)

30. AST is not equipped with an ATG Gauge stilling well IAW AW 78-24-27.

Provide 8-inch ATG Gauge stilling well and internal floating roof penetration IAW AW 78-24-27 Drawing Sheet D.07/Detail A1.

31. AST is not equipped with an ATG water probe stilling well IAW AW 78-24-27.

Provide 6-inch ATG water probe stilling well and internal floating roof penetration IAW AW 78-24-27 Drawing Sheet D.07/Detail C4.

32. Internal 2-inch water draw off pipe support are not spaced at 6 feet intervals and the one existing pipe support is not adjustable IAW AW 78-24-27.

Recommend to remove and replace one existing internal 2-inch water draw off pipe support not IAW AW 78-24-27 and provide two additional internal pipe supports IAW AW 78-24-27 Drawing Sheet D.08/Detail A4. (See Photo Log Photo 7)

33. External threaded 2-inch water draw off shell nozzle contains threaded freeze valve and threaded piping to product saver tank and does not contain a double block and bleed valve or flanged connections IAW AW 78-24-27.

Remove 2-inch threaded nozzle and piping and provide 2-inch Class 150 nozzle and 2-inch Class 150 Double Block and Bleed valve to product saver tank, and piping IAW AW 78-24- 27 Drawing Sheet D.13/Detail A1. (See Photo Log Photo 9)

34. Product saver tank does not contain a 2-inch Class 150 return nozzle, 2-inch Class 150 DB&B valve or piping returning product to the AST.

Provide new 2-inch Class 150 return nozzle, 2-inch Class 150 DB&B valve and piping IAW AW 78-24-27 Drawing Sheet D.13/Detail A1. (See Photo Log Photo 9) g6cdxmdc

SP-C: POL-TCX Review

POL-TCX: Leave as-is. The distance between 1/2 radius and current configuration is not much.

g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Concur, in SOW.

g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Concur, Dissimilar materials shall not be welded. Provide ss bolted connection between carbon steel sketch plates and aluminim guides. Provide teflon isolation between dissimilar metals. The aluminum guides may be welded to the stilling well if the stilling well is free to move vertically at the top. This is typical for tanks with geodesic domes g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Concur, in SOW, gauge well may require fixed connection at bottom and free at top due to geodesic dome.

g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Provide 4" water probe stilling well on existing tanks.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Non-concur unless the pipe support spacing is greater than ten feet. Leave as-is the existing pipe supports.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur

Dobbins AFB Tank 2015A Page 6 of 6

35. Equipment ground attached to stairway tread bottom near high levels is not IAW AW 78-24- 27.

Recommend to remove and provide equipment ground to tank IAW AW 78-24-27 Drawing Sheet D.14/Detail C4.

36. Ground cable is not supplied attaching ground cable at circumferential stairway base.

Provide ground cable attached to circumferential stairway IAW AW 78-24-27 Drawing Sheet D.11/Detail A1.

37. Access to internal floating roof is via rolling ladder.

Recommend to remove internal floating roof ladder and provide internal access ladder and platform IAW AW 78-24-27 Drawing Sheet D.08 / Detail C3.

38. External shell conduits, Varec level gauge, and control tubing are attached to shell without shell reinforcing plates.

Provide shell reinforcing plates for external shell attachments IAW AW 78-24-27 Drawing Sheet D.10/ Detail A1.

39. High and high-high level controls contain threaded nozzles, valves and piping not constructed of stainless steel IAW AW 78-24-27.

Remove and replace high and high level control nozzles, valves, piping and appurtenances and replace IAW AW 78-24-27 Drawing Sheet D.12/Detail A3 and installed so the canister does not protrude through the stair tread. (See Photo Log Photo 15)

40. No extension of the stairway exists at the high and high-high level controls.

Provide extension of the stairway at the new calculated level of high and high-high level controls after insertion of stilling wells and internal repairs IAW AW 78-24-27 Drawing Sheet G.04 Item G. 2. d. thru k. and AW 78-24-27 Drawing Sheet D.12/Detail A3.

41. Tank and external piping does not have proper identification, NFPA placards and proper labeling.

Provide tank and piping identification IAW MIL-STD 161G, NFPA 30 and NFPA 704.

42. Two 36-inch manways are equipped with hinges.

Remove and replace hinges with davit arms IAW AW 78-24-27 Drawing Sheet D.10/ Detail C4. (See Photo Log Photo 16)

43. No low and low-low level controls and assemblies are provided.

Provide new low and low-low level controls and nozzles IAW AW 78-24-27 Drawing Sheet D.12 / Detail C1.

44. The tank is not equipped with a 4-inch low draw off line located in the sump.

Recommend installing a new 4 inch nozzle and low draw off line with a double block and bleed valve IAW AW 78-24-27 Drawing D.7/Detail A3.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Equipment grounding shall not be attached to stairway treads. Why is there grounding at this location?

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur, contractor to test ground connections to ensure they are working properly.

g6cdxmdc Sticky Note SP-C: POL-TCX Review

POL-TCX: Non-concur.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Nonconcur, leave as-is.

g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Modify so that chamber is not protruding through stair tread. In SOW. Threaded nozzles and existing piping do not require modification.

g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Concur, extend stairway so a min. clearance of 22" exists between alarm chambers/piping and stair railing.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Concur.

g6cdxmdc Sticky Note SP-C: Nonconcur, in SOW

POL-TCX: Concur, in SOW.

g6cdxmdc Sticky Note SP-C: Concur

POL-TCX: Non-concur. Leave as-is.

g6edxncd

POL-TCX: Concur. Provide low-type penetration with tombstone repad iaw API 650.

Project Title: Date:

Tank Group 16 Out-of-Service API 653 Inspection 03/13/2015

Location: Pages:

Dobbins AFB, GA 1 of 5

Weston Solutions Project Number Contract No. W9128F-10-D-0072, Dobbins AFB, GA- Receipt diffuser with improper pipe supports and corrosion on the interior of the diffuser

Photo 1/Deficiency 8 and 26

Weston Solutions Project Number Contract No. W9128F-10-D-0072, Dobbins AFB, GA-Issue line with anti-vortex plate not ½ the radius of the tank.

Photo 2/Deficiency 27

No. W9128F-10-D-0072, Dobbins AFB, GA-

IFR water drain piping assembly

Photo 3/Deficiency 23

No. W9128F-10-D-0072, Dobbins AFB, GA

Stilling well not fully slotted

Photo 4/Deficiency 28

Dobbins AFB, GA 2 of 5

8-inch stilling well with aluminum guides welded to the carbon steel reinforcement plate and welded to the stilling well.

Photo 5/Deficiency 29

Coating failure under IFR legs

Photo 6/Deficiency 15

No. W9128F-10-D-0072, Dobbins AFB, GA

2-inch water draw improper pipe support

Photo 7/Deficiency 32

No. W9128F-10-D-0072, Dobbins AFB, GA- Ball valve, high level control valve and double block and bleed valve with flange to flange connection without a pressure relief.

Photo 8/Deficiency 2 and 3

Dobbins AFB, GA 3 of 5

2-inch threaded freeze valve on the water draw off line

Photo 9/Deficiency 33 and 34

No. W9128F-10-D-0072, Dobbins AFB, GA- Water draw off pipe supports constructed out of uni-strut.

Photo 10/Deficiency 7

Cracked pipe support base.

Photo 11/Deficiency 9

No. W9128F-10-D-0072, Dobbins AFB, GA- Tank ground wires bolted to the tank with no reinforcement plates and not exothermic welded to the tank.

Photo 12/Deficiency 13

Dobbins AFB, GA 4 of 5

Weston Solutions Project Number Contract No.

W9128F-10-D-0072, Dobbins AFB, GA- IFR centering device out of alignment.

Photo 13/Deficiency 10

Weston Solutions Project Number Contract No.

W9128F-10-D-0072, Dobbins AFB, GA- Open stilling well with instrumentation installed.

Photo 14/Deficiency 14

No. W9128F-10-D-0072, Dobbins AFB, GA

High and high-high level controls with threaded connections and installed through the stairway.

Photo 15/Deficiency 11 and 39

No. W9128F-10-D-0072, Dobbins AFB, GA- Hinges installed on manways in violation of

UFGS 33 56 13.13.

Photo 16/Deficiency 42

Dobbins AFB, GA 5 of 5

Coating failure on roof rafters

Photo 17/Deficiency 16

Coating failure on exterior piping.

Photo 18/Deficiency 2, 19 and 38

No. W9128F-10-D-0072, Dobbins AFB, GA- Pressure relief lines installed in the horizontal position with no test tees and stainless steel welded to carbon steel.

Photo 19/Deficiency 2

API 653

Inspection Report

Out-Of-Service or

Internal Inspection w/ External Checklist

Report Prepared For

WESTON

Dobbins AFB

GEORGIA

JET A

Tank Number

JAA

Inspected on

January 30, 2015

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

California Civil Engineer 60589

Inspection History Constructed Re-Erect Second Bottom External Inspection Internal Inspection Shell UT Inspection

1954 N/A N/A 1/30/2015 1/30/2015 1/30/2015

Next Inspection: 2020 2035 2030 mausw Typewritten Text 2015A mausw Typewritten Text

BENICIA, CA 94510

DOBBINS AFB

API 653 INTERNAL INSPECTION

MARIETTA, GA

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

API 653 Internal Dobbins AFB Georgia TkNoJAA 2015 © 2014 PE&I Inc.

Page 2 of 12 Date Printed: 2/19/15 2:01 PM

EXECUTIVE SUMMARY

Powers Engineering and Inspection, Inc. was contracted by Weston Solutions, Inc. to provide an API 653 Inspection for Tank JAA at the Dobbins AFB in Marietta, GA.

The 25-ft dia. x 24-ft high, cone roof tank with an internal double deck pontoon floating roof was constructed in 1954 by NSI in accordance with API 12C 11th. A new cone down, 5/16-in thick double bottom was installed in 2002. The tank originally was an external floating roof tank and was converted to an internal floating roof. The tank was previously in Jet A product service.

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.

In addition, according to API 653 6.3.1.1, routine inspections (in addition to formal API 653 inspections) using close visual inspection should be performed to determine the external condition of the tank on a periodic basis. If any leak paths or other adverse conditions are identified it should be documented and the authorized inspector notified.

Inspection Methods Employed Results

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

API 653 Appendix G MFL 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 5/16-in double bottom was installed approximately 8-in above the old bottom in 2002. The tank bottom was inspected for soil-side corrosion utilizing the MFE 2412 Mark II scanner.

1.2 There were no significant findings of magnetic flux leakage detected during the floor scan and proved up with a UT scrub confirmed these findings. No corrective action is required.

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

1.4 All areas inaccessible by the scanner were 100% UT

scrubbed. No indication of soil-side corrosion was identified.

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. (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 Several external components on the external tank which

includes the roof drain line and the external anti-rotation piping on the shell are currently unused. Consider removing these components.

2.2 The tank is equipped with tell-tales along the interstitial space between the new and old bottom.

2.3 The 2-in nozzle on the external shell is currently threaded.

Consider seal-welding this component.

2.4 The 30x1/2-in deep sump was inspected visually and UT

scanned along equally spaced sections along the circumference with an average wall thickness of 0.500-in.

2.5 UT readings were taken along each bottom plate (8 readings per plate) with an average bottom plate UT reading of 0.310 inches.

2.6 UT readings were taken along each the shell from the spiral stairway. Readings were approximately nominal with no significant metal loss identified. (See NDE report).

2.7 Currently, there are no repads installed on the shell

appurtenances, but the two 36-in manways are equipped with 0.375-in thickened inserts.

2.8 The 2: 6-in eternal shell nozzles connection appear to have a carbon steel to stainless steel. The dissimilar materials at the faying surface may cause galvanic corrosion. Consider installing a sealant at the faying surfaces to help prevent moisture intrusion.

2.9 The pressure relief valve is currently mounted in a horizontal position. Most pressure relief valves are designed to be installed

BENICIA, CA 94510

Page 3 of 12 Date Printed: 2/19/15 2:01 PM vertically for optimal performance and adequate drainage after a relief event. Consider modifying the pressure relief valve to a vertical orientation.

2.10 The external pipe support to foundation mounting for the 6-in nozzle appears to be broken. Consider repairing the pipe support.

3 Settlement Survey of the shell base for settlement.

Survey of the bottom for settlement.

3.1 The maximum out-of-plane settlement was measured at

approximately 0.75-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 shell was inspected for verticality and distortion. No significant distortion was identified.

3.4 The tank bottom was measured approximately 1-in cone

down.

3.5 The seismic loads were calculated utilizing the latest PI 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: 4-in vent on the internal floating roof.

5 Access Structure

VT of existing access structure.

5.1 The tank is equipped with a spiral stairway and a rolling ladder to access the internal floating roof. The current spiral stairway is non OSHA compliant. The handrail height is 26-in.

Approximately at the midway point of the spiral stairway, external piping penetrates and goes through the steps. The piping could potentially be a safety concern as it is in direct passage of the stairway. Consider installing OSHA compliant spiral stairway.

5.2 Access to the internal floating roof is via a rolling ladder.

6 Roof VT of existing roof. 6.1 The tank was converted from an external floating roof to an internal floating roof. An extension was added to the shell along with a cap on the roof.

7 Floating Roof VT of existing floating roof. 7.1 The tank originally was built with an external floating roof, but was modified to an internal floating roof. An extension was installed on the shell along with a roof.

7.2 The floating roof seals were removed during the time of the inspection. Before the tank is placed back in service, the floating roof seals and penetration gaskets should be replaced.

7.3 The floating roof is supported by 3: 3-in roof legs with 4in sleeves. The lower leg is measured at 42-in and the upper sleeve at 32-in. The roof legs sit on 28-in diameter repads.

7.4 The floating roof is equipped with 7: 24-in pontoon hatches.

All the pontoons were visually inspected. No seeps or repairs were noted.

7.5 The rim spacing were measured approximately between 7.5-

in to 8.75-in.

7.6 Monitor the floating roof to ensure no water infiltrates through the roof onto the floating roof.

8 Tank gauging overfill protection

VT of existing systems.

Is a clay valve present?

Is the preferred gauging system present?

8.1 The tank level gauge is Varec level gauge with a float system.

8.2 An 8-in diameter partially slotted gauge pole hatch is utilized for manually gauging the tank. The gauge pole is equipped with bottom connection angles which restrain vertical and horizontal movement. The support is attached to 16-in seal-welded repads.

9 Coatings VT of existing coatings 9.1 The overall status of the tank coatings are generally in good condition. Minor coating failures were identified on the external tank and access structures.

BENICIA, CA 94510

Page 4 of 12 Date Printed: 2/19/15 2:01 PM

ACTION OR CRITICAL ITEMS

REQUIRED REPAIRS PRIOR TO RETURN TO SERVICE

(MANDATORY)

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

1. (finding) The external floating roof primary and secondary seals were removed before the inspector’s arrival. In addition, the penetration gaskets should be removed and replaced.

CONSIDERATIONS OR RECOMMENDED REPAIRS

RECOMMENDED REPAIRS PRIOR TO RETURN FOR SERVICE

(NON-MANDATORY/NEAR FUTURE)

2. (finding) The current spiral stairway has a rail height of approximately 26-in at the halfway point and non-compliant steps. The stairway has a piping penetrating through the steps at the halfway point. This piping could potentially be a safety issue as it is in the direct passage of the stairway. Consider installing an OSHA approved spiral access stairway.

3. (finding) Consider installing repads on the spiral stairway.

4. (finding) Several components, including an old anti-rotation piping on the external shell and roof drain line on the floating roof are currently unused. Consider removing these components during this out-of-service period.

5. (finding) The 2: 6-in external shell nozzles appear to have a connection with dissimilar materials. The difference in materials has a possibility of causing galvanic corrosion.

Consider installing a sealant at the faying surfaces to help prevent intrusion of moisture.

6. (finding) The pressure relief valve is currently in a horizontal position. Consider modifying to a vertical orientation for proper performance and adequate drainage after a relief event.

7. (finding) The external pipe support to foundation mounting appears to be broken. Consider repairing the pipe support.

BENICIA, CA 94510

Page 5 of 12 Date Printed: 2/19/15 2:01 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) Basic Tank Information Shell Settlement Survey Shell Thickness Calculation Shell Roll-Out Floating Roof Bottom Lay-out Next Inspection Seismic

Appendix A API 653 Checklist Appendix B Photos Appendix C NDE Data

BASIC TANK INFORMATION

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

JAA

FUELING

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

JET A

17,500 Type Tank: Year Built: Design Standard: Manufacturer:

INTERNAL DOUBLE DECK PONTOON

FLOATER

API 12 C 11TH

NSI

Type Shell: Type Roof: Type Foundation: Type Bottom:

BUTT-WELDED

CONE ROOF

CONCRETE RING

5/16-IN LAP WELDED

DOUBLE BOTTOM

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

DOUBLE DECK

PONTOON FLOATING

ROOF

METALLIC SHOE

SECONDARY

20-IN ROOF DRAIN

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

SPIRAL STAIRWAY

ROLLING LADDER

1:12-IN

1:36-IN

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

UNKNOWN

1:6-IN D

1:6-IN

2:36-IN MW

Leak Detection: Secondary Containment: Cathodic Protection: Insulation:

TELL TALES IN SPACE

UNDER SECOND

BOTTOM

CONCRETE DIKE

SACRIFICIAL ANODE

NONE

BENICIA, CA 94510

Page 6 of 12 Date Printed: 2/19/15 2:01 PM

Find: Shell Settement API 653 4th edition Addendum 1 Appendix B Methodology

Given: Tank Number JAA Circumference 78.5 (ft)

Tank Diameter 25.0 (ft) Req'd Stations 79 / 32 = 3 ref API 653 12.5.1.2

4 Actual Stations 4

Sum of Sqr. Dif 1.188

19.6 L < 32-ft OK

30,000 Y Survey Max 0.063 (ft)

29,000 E 0.75 (in)

24.0 H Curve Fit R^2 1.0000

Results: Allowable > Actual

Differential (ft) 0.091 > 0.042 Pass

(in) 1.097 > 0.500

Fit Cosine to Data

Spacing Between (ft)

Tank Height (ft)

Modulas of Elasticity (ksi)

Allowable Stress (psi)

Curve Fit OK R^2>=90% ft 59 0 20 39

Actual 0 0.50 0.75 0.50 0.00

Cosine 0.00 0.38 0.75 0.38 0.00

0.00

0.10

0.20

0.30

0.40

0.50

0.60

0.70

0.80 S

et tl em en t (i n

Circumferential Distance (ft)

Base of Shell Elevation for 4 point Survey

SHELL SETTLEMENT 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:

BENICIA, CA 94510

Page 7 of 12 Date Printed: 2/19/15 2:01 PM

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

Give n:

Variable Identifier Description Value Reference

H Fill he ight (ft) 20.00 Measured from the ba se of each she ll course (see column H in the table be low) D T ank Diame ter (ft) 25.00 G Specific Gra vity 0.82 S Allow stress (psi) Varie s Re fe rence API 653 T able 4-1 E Joint Efficie ncy Varie s Re fe rence API 653 table 4.2 for We lded and 4.3 for R ive ted construction M 1.00 T emp Modifie r Varie s Re fe rence API 650 Appendix M Eleva ted te mpera ture modifie r

H E S Actual Solution

2.6 ( H - 1) DG

SEM

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

288.00 24.25

Shell Corrosion Rate Calculations API 653 6.3 © POWERS Engineering and Inspection, Inc. 2015

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 1954 2015 2015 0.250 0.250 0.250 0.100 0.00000 0.0000 0.1500 5 15 2 1954 2015 2015 0.245 0.245 0.245 0.100 0.00000 0.0000 0.1450 5 15 3 1954 2015 2015 0.185 0.185 0.190 0.100 0.00000 0.0000 0.0900 5 15 4 1954 2015 2015 0.185 0.185 0.185 0.100 0.00000 0.0000 0.0850 5 15

Sum

RCA/ 4N

Next

External

API 653

6.3.2

RCA/ 2N

Next UT

Inspection

API 653

6.3.3

Date(s)

Year B uilt o r

R eplaced

Inspection Year Thickness

Measured

Corrosion Rate(s)

API 653

6.3.2.1 (A-B)

0.1000 0.1900 Ok

( 27,376 x 0.70 x 1.00)

2.6 x ( 2.00 - 1 ) x 25.00 x 0.82

0.1000 0.1850 Ok

( 27,376 x 0.70 x 1.00)

2.6 x ( 8.00 - 1 ) x 25.00 x 0.82 27,376

27,376

70% Butt We ld

70% Butt We ld

0.70 A 36

0.70 A 366

6 8.00

2.00

72.00

72.00

70% Butt We ld 0.70 A 36 24,882 0.1000 0.2450 Ok

1 72.00 6 20.00 70% Butt We ld 0.70 A 36 24,882 2.6 x ( 20.00 - 1 ) x 25.00 x 0.82

( 24,882 x 0.70 x 1.00)

0.1000 0.2500 Ok

2.6 x ( 14.00 - 1 ) x 25.00 x 0.82

( 24,882 x 0.70 x 1.00) 2 72.00

Type of Joint for each Course

Joint Eff

API 653

Tbl 4.2 and 4.3

Material Type or Unknown

W elded or Riveted

Solution:

T able for Ca lcula ting minimum she ll thickness (t min) for ea ch she ll 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

6 14.00

SHELL THICKNESS CALCULATION

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Page 8 of 12 Date Printed: 2/19/15 2:01 PM

SHELL ROLL-OUT

BENICIA, CA 94510

Page 9 of 12 Date Printed: 2/19/15 2:01 PM

11 12

P1

P2

P3

P4 P5

P6

7X 24-IN PONTOONS

4-IN VENT

20-IN ROOF DRAIN

P7

6-IN OLD GAUGE HATCH

ROLLING LADDER

14-IN PENETRATION W/

8-IN GAUGE POLE

1 2

3 4

6 7

8 9 10

36-IN MW

FLOATING ROOF

BENICIA, CA 94510

Page 10 of 12 Date Printed: 2/19/15 2:01 PM

BOTTOM LAY-OUT

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Page 11 of 12 Date Printed: 2/19/15 2:01 PM

Find: Bottom re pa ir threshold crite ria to pe rmit re turn to se rvice until the ne xt inspe ction utilizing the API 653 4.4.5 MRT methodology

Variable Identifier

Minimum re ma ining thickness a t the e nd of inspe ction inte rva l, Or

In-service inte rva l of ope ra tion (ye ars to ne xt interna l Inspection) Or Not to e xce e d tha t a llowe d by API 653 6.4.2

Minimum remaining thickne ss from bottom side corrosion RT bc Afte r re pa irs

Minimum re ma ining thickne ss from inte rna l corrosion RT ip Afte r re pa irs

Maximum ra te of corrosion not re pa ire d from inte rna l corrosion StPr StPr = 0 for coa te d a rea s of the bottom If coa ting life < Or use O

Maximum ra te of corrosion not re pa ire d on the bottom side UPr

Curre nt Insta lla tion Age A Age of bottom (Inspe ction ye ar - Insta lla tion ye a r): 2015 1954 61 61 61

Expected Pe riod until ne xt inspection (ye a rs): 20 20 20

Bottom thickne ss Bottom CZ Annular

B Nominal thickness when bottom installed (in): 0.3125 0.3125 n/ a

API 650 Required Bottom Thickness (in) API 650 T a ble 5-1b API 653 Required Bottom Thickness (in)

Minimum thickness (MRT ) C Bottom awa y from CZ and Annula r single bottom 0.100 0.156 n/ a API 653 ta ble 4-4, 4.4.5, and 4.4.6

Bottom Coa ting Estima te d life of coa ting (ye a rs) 20 20 n/ a

Re pa ir crite ria D Product side corrosion repair thickness RTip (in): 0.2125 0.2525 n/ a

Pit Depth to be Repaired (in) 0.1000 0.0600 n/ a

E Bottom side corrosion repair thickness RTbc (in): 0.2340 0.2483 n/ a

F Minimum RTbc and RTip (in): 0.2125 0.2483 n/ a

StPr = (B-D)/ A 0.00164 0.00098 n/ a

StPr = 0 if estimated life of bottom coating > 0r 0.00000 0.00000 n/ a

UPr = (B-E)/ A 0.00129 0.00105 n/ a

G StPr + UPr 0.00129 0.00105 n/ a

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

Or = (F-C)/ G 87.42038 87.46184 n/ a 20.00

Solution:

1a .) Re pa ir a ll bottom pla te pits dee per tha n 0.1000-in and a ll bottom pla te soil side corrosion re sulting in re maining thickne ss le ss than 0.2125-in.

1b.) Re pa ir a ll bottom CZ pits de e pe r tha n 0.0600-in a nd a ll bottom CZ soil side corrosion resulting in re ma ining thickness less tha n 0.2483-in.

2.) Apply or Ma inta in a coa ting syste m to provide product side corosion resistance until the next inspe ction.

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

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

UPr = 0 for a re a s of bottom with e ffe ctive Ca thodic Prote ction UPr= MFE thre shold or Minimum rema ining thickne ss from bottom side corrosion a fte r re pa irs.

T o exte nd the pe riod until ne xt inte rna l or bottom inspe ction 20 ye ars or until the ye ar 2035

'Or' min or 20 ye a rs

NEXT INSPECTION

BENICIA, CA 94510

Page 12 of 12 Date Printed: 2/19/15 2:01 PM

T a nk Numbe r: JAA

T ype Roof

T a nk (D)iame te r (ft) 25.00 T a nk (H)e ight (ft) 24.00

Product fill He ight (ft) 20.00 Hfill Spe cific (G)ravity 0.82

Loca tion: La titude (de g) 37.087915 Longitude (de g) 76.363844

Spectra l Re sponse Fa ctors Ss 0.10 9.90% USGS or UFC 3-101 -1 tbl F-2 S1 0.05 4.90% USGS or UFC 3-101 -1 tbl F-2 So 0.040 = Ss*0.4 for Ma pped Methods

Site Coefficie nts Fa 1.600 API 650 T able E-1 Fv 2.40 API 650 T able E-2

Regiona l-de pe nda nt transition period T L 8 ASCE 7 ma ps Va rie s from 4 to 16 Sm1=Fv*S1 0.1176

Use Group Importance Fa ctor (API 650 T bl E-5) 1.5 Site Soil Cla ssifica tion D Stiff Soil T able E-3 API 650 IBC 2009 table 1613.5.2

Se ismic Use Group IV SUI or I Use: group III e sse ntia l, II public risk, or I

T hickness of Bottom under the she ll (in) 0.3125 tb Min Req'd T hickness of Bottom under she ll (in) 0.1000 API 653

Ca lc'd 10.50 Width of Annula r Pla te (in) 0.88 L API 650 Appe ndix E.6.2.1.1.1 API 650 Appendix M T eme pra ture Modifie r 1.00 T m

Yie ld of Bottom Under She ll (psi) 36,000 Fby Yie ld of 1st she ll course (psi) 36,000 Fyie ld 1st Coursep

(psi) 24,882 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-se c Gust De sign Wind Ve locity (mph) 100 V IBC 2009 fig 1609 or UFC 3-101 -1 tbl F-1

Solution:

Uplift ?

Compressive Stress ?

Wind Overturning for 100 mph wind?

Find: Product fill he ight for se ismic loa ding utilizing API 650 11th e dition Appendix E Methodology

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

API 650 11th Appendix E Ca lcula tions for La t 37.08792 and Long 76.36384

No Seismic uplift is expected for fill heights < 20.00 (ft)

Good ! Calculated Seismic Compressive Stress is less than Allowable

4 Cone roof with Inte rna l Ste e l Pa n Floa te r

SEISMIC

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

DOBBINS AFB,, GA

Tank: JAA

WWW.POWERSEI.COM

POWERS

Wednesday, February 18, 2015

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

DOBBINS AFB,, GA

Tank: JAA

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/A Concrete FoundationC.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.

okC.1.1.1.b Inspect drain openings in ring, back of waterdraw basins and top surface of ring for indications of bottom leakage.

okC.1.1.1c Inspect for cavities under foundation and vegetation against bottom of tank.4 okC.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/A Concrete FoundationC.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 okC.1.2.1.c Inspect the bottom-to-foundation seal, if any.16

Internal (Floating Roof Tank) N/AC.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

Wednesday, February 18, 2015

Appendix A Page 2 of 13

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API 653 Inspection Checklist

US AIR FORCE

DOBBINS AFB,, GA

Tank: JAA

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 okC.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

NOT PERFORMEDC.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 okC.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 okC.1.3.2.b Inspect fire fighting system components32

Wednesday, February 18, 2015

Appendix A Page 3 of 13

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Tank: JAA

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POWERS

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 okC.1.3.2.g Check for damage and test the accuracy of temperature indicators.37 okC.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 See ReportC.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…