Attachment J.2 - ERK-FAC 77526-Tank 124-Final-2021.pdf

ACOE CONTRACT W911KB-21-D-0006, DELIVERY ORDER W911KB21F0090

TANK 124 (FACILITY NO. 77526)

API 653 IN-SERVICE INSPECTION AND

SUITABILITY FOR SERVICE EVALUATION

FINAL INSPECTION REPORT

(PRE-REPAIR)

Eareckson Air Station, Alaska

September 2021

Contract Agency:

U.S. Army Engineer District, Alaska P.O. Box 6898 Elmendorf AFB AK 99506-6898

Prepared By:

2525 Gambell Street, Suite 200 Anchorage, AK 99503

Michael B. Morris, P.E.

API Inspector of Record API 653 Certificate No. 56148

Nicholas S. Beeker Mechanical Design Engineer (EIT)

Submitted By:

David A. Stchyrba, P.E.

Chief Structural Engineer API 653 Certificate No. 27187

EEI Project No. 9833

Tank 124 – API 653 Inspection SUITABILTIY FOR SERVICE STATEMENT Eareckson Air Station, Alaska September 2021 EEI Project No.: 9833

SUITABILITY FOR SERVICE TESTAMENT

TANK 124 (FACILITY NO. 77526)

Enterprise Engineering, Inc. (EEI) has completed a comprehensive, in-service external inspection and suitability for service evaluation of Tank 124 at Eareckson Air Station, Alaska. The inspection was performed June 28 - July 1, 2021. The inspection was performed in accordance with the applicable criteria of API Standard 653, UFC 3-460-01, UFC 3-460-03, and the Statement of Work.

This report provides inspection findings, tank suitability for service evaluation, conclusions, and recommendations for repair. Recommendations for continued long-term service are also provided.

EEI recommends the next API 653 external in-service inspection be scheduled no later than July 2026 (5 years from 2021 inspection), or sooner if a change in condition has occurred.

EEI recommends the next API 653 internal out-of-service inspection be scheduled no later than May 2036 (20 years from the 2016 inspection), or sooner if a change in condition has occurred.

In accordance with API Standard 653 and ADEC Regulation 18 AAC 75, this report satisfies the requirement for an in-service, integrity inspection and as such, should remain available as a historical record for future reference.

I hereby acknowledge that being familiar with the provisions of API Standard 653, the inspection and evaluation was performed in accordance with the provisions of API Standard 653 and good engineering practices, and with the exercise of usual and customary care.

September 20, 2021 Michael B. Morris, P.E.

API 653 AST Inspector Certificate No. 56148

The tank inspection has identified one mandatory repair however it does not affect the hydraulic or structural integrity of the tank. The mandatory repair concerns the containment area drain valve. Tank 124 is suitable to remain in service. Recommended repairs have been identified. It is recommended that these repairs be performed as soon as feasible, or the next time the tank is removed from service.

Tank 124 – API 653 Inspection TABLE OF CONTENTS

EEI Project No.: 9833

TABLE OF CONTENTS

Page

1.0 SUMMARY

Scope General

2.0 INSPECTION ASSESSMENT

Hydraulic Integrity Structural Integrity Next Inspection

3.0 REPAIR ITEMS

Standard of Care

4.0 COATING SYSTEM

Coating Requirements

5.0 SUITABILITY FOR SERVICE EVALUATION

Corrosion Rates Tank Shell Corrosion Rates Hydraulic and Structural Integrity Summary

5.0 ADDITIONAL DISCUSSION ITEMS

6.0 CLOSURE

Conclusions EEI Project Team

APPENDICES

Tank Inspection Data Sheet and Evaluation Items ...................................................................... Appendix A Assessment of Compliance with Military Criteria ....................................................................... Appendix B Non-Destructive Examination (NDE) and Evaluation Criteria ................................................... Appendix C Tank Drawings ............................................................................................................................. Appendix D Tank Photographs ........................................................................................................................ Appendix E NDE Results................................................................................................................................. Appendix F Calculations.................................................................................................................................. Appendix G

Tank 124 – API 653 Inspection Page 1

EEI Project No.: 9833

TANK 124

API 653 TANK INSPECTION

SUITABILITY FOR SERVICE EVALUATION

EARECKSON AIR STATION, ALASKA

1.0 SUMMARY

Scope

Enterprise Engineering Inc. (EEI) has been retained to perform an in-service external integrity inspection of Tank 124 at Eareckson Air Station, Alaska. The inspection was performed June 28 – July 1, 2021.

The inspection was performed in accordance with the applicable portions of API Standard 653, UFC 3- 460-01, UFC 3-460-03, and the Statement of Work. The API 653 criteria were followed in terms of procedure and evaluation to the greatest extent possible. Inspection findings and recommended repairs are provided below.

The scope of this project is to determine the structural and hydraulic condition of the tank, determine suitability for service, provide written recommendations for repairs, and develop recommendations for long-term service based on visual inspection and non-destructive examination (NDE).

General

Tank 124 is a field-erected, vertical aboveground storage tank. The tank was fabricated and erected in 1988. The tank is 100 feet in diameter and 40 feet high. It is of welded construction with butt-welded shell plates and lap welded floor and roof plates. The tank floor is cone down with a center sump. The tank has a column-supported fixed cone roof. The nominal shell capacity is 55,000 Bbls and the tank is currently in JP-8 service.

2.0 INSPECTION ASSESSMENT

The Appendices in this report include a comprehensive table identifying tank features with findings and conclusions as appropriate. The Appendices also contain numerous tables with full reporting of data taken. The following discussion only addresses key integrity issues.

Tank 124 is considered suitable to remain in service. The tank inspection identified a mandatory repair item; however, this item does not affect the hydraulic or structural integrity of the tank.

Hydraulic Integrity

Hydraulic integrity is the ability of the tank to hold product without compromise to the boundaries of the floor and shell.

Inspection of the tank shell and roof found no holes or indications of leaks. As the tank was in-service at the time of inspection, the condition of the floor is unknown.

The in-service inspection and evaluation found no conditions that affect the hydraulic integrity of the tank.

Tank 124 – API 653 Inspection Page 2

EEI Project No.: 9833

Structural Integrity

Structural integrity is the capability of the tank to remain freestanding, with or without product, under the conditions of its design basis. Structural attributes include the floor, shell, roof, and their attachments.

Ultrasonic inspections of the shell were performed on the first course and each course up the exterior spiral stair. From interpretation of ultrasonic thickness (UT) readings recorded, only minor metal loss due to corrosion was observed.

The in-service inspection and evaluation found no conditions that affect the structural integrity of the tank.

Next Inspection

API 653 requires an in-service inspection by an authorized inspector be performed every 5 years or RCA/4N years, whichever is less. RCA is the remaining corrosion allowance of the shell (i.e. the difference between the minimum measured shell thickness and the minimum required shell thickness in mils) and N is the shell corrosion rate in mils per year. When shell corrosion rates are unknown, API 653 requires the in-service inspection interval not to exceed 5 years.

EEI recommends the next API 653 external in-service inspection be scheduled no later than July 2026 (5 years from this 2021 inspection), or sooner if a change in condition or change in service has occurred.

The Alaska Department of Environmental Conservation (ADEC) requires an inspection per the requirements of API 653. API 653 requires the interval until the next internal inspection be determined using corrosion rate procedures or Risk-Based Inspection (RBI) procedures. When corrosion rate procedures are used, the interval shall not exceed 20 years for tanks without a release prevention barrier or 30 years for tanks with a release prevention barrier.

It should be noted that ADEC may reduce the inspection interval for a specific storage tank if

(a) The storage tank is older than 30 years,

(b) The storage tank is of riveted or bolted construction,

(c) The storage tank has demonstrated structural, corrosion, or foundation problems, or

(d) After a significant seismic event.

Although the tank is older than 30 years, it is not anticipated that the State will require a reduced inspection interval.

EEI recommends the next API 653 internal out-of-service inspection be performed no later than May 2036 (20 years from the 2016 OOS inspection). The next out-of-service inspection should be performed sooner if a change in condition or a change in service occurs.

3.0 REPAIR ITEMS

Based upon the API field inspection, engineering judgment and knowledge of funding practices, recommendations developed are listed below as required (mandatory), recommended (non-mandatory), recommended for long-term serviceability, and recommended for non-tank inspection items. Refer to Appendix B, “Assessment of Compliance with Military Criteria” for comprehensive comments and recommendations of the tank's compliance with military criteria.

Tank 124 – API 653 Inspection Page 3

EEI Project No.: 9833

Standard of Care

All repairs shall strictly meet the requirements of API 650 and API 653 regarding material, welding procedures and qualification of welders, NDE of welding and testing requirements.

REQUIRED REPAIRS (MANDATORY)

Findings Repair Photo

Mandatory repairs are repairs that are critical to the hydraulic and structural integrity of the tank and may require removing the tank from service.

1. The inspection team noted that the Tank 124 containment drain pipe had a steady water drip. The team observed that the valve was not completely snug. The valve was temporarily completely closed and the drip persisted. The valve may have been left cracked to manage water levels in the containment area.

Service the secondary containment gate valve to ensure it can positively seal. Replace the seals or valve if necessary. As a best management practice, the valve should not be left cracked and should only be opened by operators when actively draining water from the secondary containment area.

Note: This repair has been designated for Recurring Maintenance and Minor Repair (RMMR) execution by AFPET / DLA.

Recommend the same repair be performed for the Tank 125 secondary containment valve (same valve configuration as Tank 124).

See “Additional Discussion Items” below.

RECOMMENDED REPAIRS (NON-MANDATORY)

Findings Repair Photo

The repairs listed below are not mandatory per API 653 or for structural and hydraulic integrity of the tank but should be performed if approved by the Government for the long‐term preservation and integrity of the tank.

1. Minor coating failure was identified on the wind girder.

Provide surface preparation and recoat the affected area.

Quantity: Approximately 10% of the surface area; approximately 75

sq. ft.

Tank 124 – API 653 Inspection Page 4

EEI Project No.: 9833

RECOMMENDED REPAIRS (NON-MANDATORY)

Findings Repair Photo

2. Minor coating failure was identified on the roof plates

Provide surface preparation and recoat the affected area.

Quantity: Approximately 50 sq. ft.

total; approximately 25 locations (1

sq. ft. each), 5 to 10 sq. ft. near the ATG and 5 to 10 sq. ft. near atmospheric vent‐2.

3. Minor coating failure was identified on the roof nozzles

Provide surface preparation and recoat the affected area.

Quantity: 10‐inch atmospheric vents 1 and 2, 30‐inch manway 1 and 2, ATG, tape gauge penetrations, VITO probe nozzle, painter's post, manual gauging hatch, and level alarm; total quantity approximately 20 sq. ft.

Tank 124 – API 653 Inspection Page 5

EEI Project No.: 9833

RECOMMENDED REPAIRS (NON-MANDATORY)

Findings Repair Photo

4. Coating failure and corrosion were identified on the roof conduit support brackets.

Provide surface preparation and recoat the affected area.

Quantity: 11 brackets

5. The ATG hatch is missing one closure clasp.

Replace the missing closure clasp.

6. The VITO probe nozzle is missing 2 bolts (8‐inch diameter nozzle).

Provide two bolts for the VITO probe nozzle.

7. The ATG nozzle is braced off of the handrail. The collar securing the bracing to the nozzle is corroded.

Provide surface preparation and recoat the affected areas.

Quantity: Approximately 3 sq. ft.

Tank 124 – API 653 Inspection Page 6

EEI Project No.: 9833

RECOMMENDED REPAIRS (NON-MANDATORY)

Findings Repair Photo

8. Coating failure and corrosion were identified on the roof handrail (approximately 50%).

Provide surface preparation and recoat the affected areas.

Quantity: Approximately 300 linear feet

9. The high‐level valve float tubing is supported on brackets on the tank shell. The supports consist of L2 supports welded to the tank shell and Unistrut tube holders connected to the L2 supports with self‐tapping screws. On the top support bracket, the L2 support and Unistrut tube holder have become disconnected.

Reattach the Unistrut tube holder to the bracket.

Quantity: One location

10. The 1‐inch diameter pipe connected to the high‐level valve float chamber is experiencing coating failure and corrosion.

Provide surface preparation and recoat the affected areas.

Quantity: 1 sq. ft.

11. The stair handrail system has a galvanized finish. The galvanized finish has failed on approximately 10% of the handrail.

Provide surface preparation and recoat the affected area with a coating system compatible with a galvanized finish.

Quantity: Approximately 50 linear feet.

Tank 124 – API 653 Inspection Page 7

EEI Project No.: 9833

RECOMMENDED REPAIRS (NON-MANDATORY)

Findings Repair Photo

12. One of the shell‐mounted brackets for supporting the high‐ level valve tubing is missing the Unistrut tube holder. Note that the tubing is not aligned properly at this location.

Provide a tube holder for the location with the missing holder.

Realign the tubing.

13. Minor coating failure and corrosion were identified on the anchor chairs.

Provide surface preparation and recoat the affected areas.

Quantity: Approximately 1 sq. ft..

per anchor chair, 36 sq. ft. total.

14. Minor coating failure and corrosion were identified on the edge of the floor projection.

Provide surface preparation and recoat the affected areas.

Quantity: Approximately 50 linear feet.

Note that the floor projection to ringwall sealant will require repair at these locations if surface preparation damages the sealant.

Tank 124 – API 653 Inspection Page 8

EEI Project No.: 9833

RECOMMENDED REPAIRS (NON-MANDATORY)

Findings Repair Photo

15. Minor coating failure and corrosion were identified on the tape gauge conduit and shell support brackets.

Provide surface preparation and recoat the affected areas.

Quantity: Approximately 40 linear feet.

16. Coating failure and corrosion were identified on the shell high‐ level valve tubing support brackets.

Provide surface preparation and recoat the affected areas.

Quantity: Approximately 10 sq. ft.

17. Minor coating failure and corrosion were identified on the tank shell.

Provide surface preparation and recoat the affected areas.

Quantity: Approximately 25 locations: 1 sq. ft. each.

Tank 124 – API 653 Inspection Page 9

EEI Project No.: 9833

RECOMMENDED REPAIRS (NON-MANDATORY)

Findings Repair Photo

18. Minor coating failure and corrosion were identified on the shell nozzles and valves.

Provide surface preparation and recoat the affected areas.

Quantity: Approximately 10 sq. ft.

19. Minor coating failure and corrosion were identified on the piping within the containment area.

Provide surface preparation and recoat the affected areas.

Quantity: 8‐inch diameter approximately 100 linear feet and 4‐inch diameter approximately 50 linear feet

Tank 124 – API 653 Inspection Page 10

EEI Project No.: 9833

RECOMMENDED REPAIRS (NON-MANDATORY)

Findings Repair Photo

20. There was a discrepancy between the value of the Varec tape gauge display and the value displayed by the ENRAF ATG.

Service the Varec Tape Gauge Display and/or ENRAF ATG system to restore accurate functionality.

RECOMMENDED REPAIRS (LONG TERM SERVICEABILITY)

1. Program the tank for the next API 653 in‐service inspection no later than July 2026 (5 Years)

2. Program the tank for the next API out‐of‐service inspection no later than May 2036 (20 years after the 2016 OOS inspection).

3. Test all level alarms and switches as part of ongoing maintenance.

4. Tank 124 is not equipped with ice/snow shields above the tank nozzles. From past experience, it is the recommendation of EEI to provide ice/snow shields above the nozzles to prevent damage from falling ice. This recommended repair can be deferred until the next out‐of‐service inspection.

4.0 COATING SYSTEM

Coating Requirements

Coating materials and application requirements for the type and location of repair items shall be in accordance with the applicable UFGS specifications unless directed to use a different product by the government.

5.0 SUITABILITY FOR SERVICE EVALUATION

Corrosion Rates

Corrosion rates for the tank shell and roof were calculated using thickness measurements that were obtained during the inspection and are as follows:

Shell: Negligible – Plate thickness is within mill tolerance Roof: Negligible – Plate thickness is within mill tolerance

The corrosion rates were calculated using an assumed original metal thickness and a 1988 year of construction.

Tank Shell Corrosion Rates

API 653 4.3.1.3 states that tank shell corrosion can occur in many forms and varying degrees of severity and may result in a generally uniform loss of metal over a large surface area or in localized areas. The corrosion rate for the tank shell was calculated based on the original nominal shell thickness and the minimum recorded shell thickness during the inspection.

Tank 124 – API 653 Inspection Page 11

EEI Project No.: 9833

UT readings of the shell were obtained at the bottom shell course and accessible locations from the spiral stairs at the upper shell courses. The shell plate thickness will not be reduced below the minimum value at a 5-year inspection interval.

Hydraulic and Structural Integrity Summary

The following table summarizes the hydraulic and structural integrity of the tank:

HYDRAULIC AND STRUCTURAL INTEGRITY

Evaluation Item

Findings Comments

Foundation Tank sits on a concrete ringwall. The tank passes API 653 criteria for levelness and differential settlement.

Acceptable

Floor Projection

No conditions were found that affect the hydraulic or structural integrity of the floor projection

Acceptable

Shell Visual inspection of the accessible shell joints found no relevant indications. A pit survey was conducted and no locations were identified for repair.

Acceptable

Roof Spot ultrasonic testing of the roof plates found no noticeable thinning of the plates.

Acceptable

Internal Fluid Pressure

Hoop stresses by internal fluid pressure pass API 653 criteria.

Acceptable

Hydrostatic Test

Shell is adequate to resist the internal fluid pressure caused by a full‐height hydrostatic test with water.

Acceptable

Brittle Fracture The API 653, Section 5, Figure 5.1, Brittle Fracture Considerations has been evaluated with the following findings:

1. Does the tank meet API 650(7th edition or later, 1980):

Yes, constructed in 1988.

2. Has a prior hydrotest been performed demonstrating fitness: Unknown.

3. Is the tank shell thickness < 0.5 inches: Yes.

4. Does the tank operate at metal temperature above 60 deg F?: No.

5. Is the tank membrane stress below 7 ksi?: No.

6. Tank steel exempt per API 650, Figure 4.1 or API 653 Figure 4.1: Yes.

7. Tank full at lowest one day temperature per API 650 Figure 4.1: Unknown, but likely.

The tank, with a first shell course thickness less than 0.5 inches, does not fit the API 653 at‐risk profile for brittle fracture failure.

Seismic Evaluation

The Tank is anchored. Seismic calculations were performed in accordance with API 650 Appendix E. It was found that the tank anchors are adequate and that the shell stresses are within limits at the current fill height of 38 feet 6 inches.

Calculations were performed utilizing the specific gravity for JP‐8 (S.G. = 0.84), a ringwall foundation, seismic parameters Ss = 1.50, S1 = 0.60, an importance factor of 1.25.

Acceptable

Tank 124 – API 653 Inspection Page 12

EEI Project No.: 9833

HYDRAULIC AND STRUCTURAL INTEGRITY

Evaluation Item

Findings Comments

Wind Evaluation

A wind analysis was performed per API 650, Section 5.11.

Calculations were performed using a wind velocity of 160 mph and Risk Category III.

The evaluation determined that an empty anchored tank is stable and not at risk of overturning or sliding.

Evaluation of the shell buckling determined that the shell is inadequate, without stiffeners, for wind speeds greater than 91 miles per hour. The tank is equipped with a shell stiffener located on the 4th course; no additional action is required.

Acceptable

5.0 ADDITIONAL DISCUSSION ITEMS

The secondary containment area drain valve has been identified as a mandatory repair. During the field visit, it was observed that the secondary containment area drain valve was allowing liquid to drain out of the secondary containment area. Further investigation determined that the valve was not fully closed. It is possible facility personnel cracked the valve in order to drain excess water from the secondary containment area. The valve continued to allow fluid to drain even after the valve was fully closed. In the event of a release from Tank 124, this valve will not effectively prevent the escape of fuel outside of the secondary containment area. This valve must be repaired by means of rebuilding the valve or replacement of the valve so that it prevents the escape of fluid when fully closed.

6.0 CLOSURE

Conclusions

Based on the extent of this inspection and lack of mandatory repairs that affect the hydraulic or structural integrity of the tank, Tank 124 is considered suitable to remain in service.

EEI Project Team

Site Team

Mike Morris, P.E. Mechanical Engineer, Inspector of Record API 653 AST Inspector Certificate No. 56148 API 570 Piping Inspector Certificate No. 51732

Mike Fefelov, P.E. Civil Engineer

Support Team

Stacy M. Kaplan-McMillan Senior Project Manager

David. A. Stchyrba, P.E. Structural Engineer, QC Review API 653 AST Inspector Certificate No. 27187

Nicholas S. Beeker, E.I.T. Mechanical Engineer, CWI

Page Intentionally Left Blank

APPENDIX A

Tank Inspection Data Sheet and Evaluation Items

Tank 124 – API 653 Inspection APPENDIX A, Tank Summary Sheet Eareckson Air Station, Alaska EEI Project No.: 9833

DLA ENERGY TANK CMP CONDITION FORM

TANK INSPECTION SUMMARY SHEET

Tank Location (Site Code): Eareckson Air Station, Alaska Tank No.: 124

Facility No.: 77526 Inspection Date(s): June 28 – July 1, 2021

Tank Type: Vertical Above Ground Storage Tank Type of Inspection: In-Service External w/ Suitability for Service Evaluation

Contract Number, Task Order: W911KB-21-D-0006, W911KB21F0090 Prime Contractor Name: Enterprise Engineering, Inc.

Inspector, Certificate #: Michael B. Morris, P.E.

API-653 AST Inspector Certificate No. 56148

Inspection Company: Enterprise Engineering, Inc.

2525 Gambell Street, Suite 200 Anchorage, AK 99503

(907) 563-3835

Manufacturer, Date, Design Standard: Unknown (missing name plate), Assumed API 650 Diameter: 100’-0” (nominal)

Shell Height: 40’-0” (nominal) Product, Specific Gravity: JP-8, 0.84

Design Pressure / Temperature: Unknown (assumed atm. / ambient) Gross Capacity / Nominal Capacity: 55,000 Bbl nominal

Safe Fill Height: 38’-6” GPS Latitude & Longitude: 52 Deg 43’ 55.47” N, 174 Deg 05’ 20.57” W (Source – Google Earth) Foundation Configuration: Concrete Ringwall

Shell Configuration: Butt Welded, 5 courses Roof: Fixed cone, column supported roof

Floating Pan Tank is not equipped with a floating pan Cathodic Protection: Impressed Current

Stilling Wells: (1) 8” at ENRAF ATG display

(1) 8” for manual gauging and sampling

Last Inspection (Type, Date): May 2016 out-of-service inspection by EEI Last Coated Internally (Product): Epoxy polyamide topcoat, circa 2000 Last Coated Externally (Product): Spot coating of shell occurred following 2016 inspection (moisture cured polyurethane per repair project scope of work).

INSPECTION RESULTS

Can tank remain in service?: Yes.

Deficiencies identified as mandatory repairs: Yes, however tank may remain in service, see paragraph titled “Mandatory Repairs” in body of report

Deficiencies identified as recommended repairs: Yes, see paragraph titled “Recommended Repairs” in body of report.

Deficiencies identified as long term repairs: Yes, see paragraph titled “Recommended Repairs for Long Term

Serviceability” in body of report Next Scheduled API Inspections (Type, Date): API 653 In-Service: July 2026 (5 years)

API 653 Out-of-Service: May 2036 (20 years from last OOS inspection)

Next Scheduled Tank Cleaning (UFC 3-460-03, 2016): May 2036 (at next out-of-service inspection)

ADDITIONAL ITEMS

Change in Service: None

As-Built Drawings, Specifications: Not available.

API STANDARD 653

TANK IN-SERVICE INSPECTION CHECKLIST

Tank 124 – API 653 Inspection APPENDIX A, Page 1 Eareckson Air Station, Alaska (ERK) EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

Location: Eareckson Air Station Date: 7/21/21

EEI Project No.: 9833

Item Completed Comments

C. 1.1 FOUNDATION

Measure foundation levelness and bottom elevations (see Appendix B for extent of measurements)

X No evidence of settlement was noted. The tank passes API 653 criteria for levelness and differential settlement.

C. 1.1.1 Concrete Ring

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

X Concrete ringwall in acceptable condition, no spalling identified.

b. Inspect drain openings in ring, back of water draw basins, and top surface of ring for indications of bottom leakage.

X No evidence of leaks identified.

c. Inspect for cavities under foundation and vegetation against bottom of tank. X No cavities observed.

d. Check that runoff rainwater from the shell drains away from tank. X No concern.

e. Check for settlement around perimeter of tank. X No evidence of settlement was noted. The maximum differential settlement between max elevation and minimum elevation was 0.100 feet.

C.1.2 Asphalt

a. Check for settling of tank into asphalt base which would direct runoff rainwater under the tank rather than away from it.

N/A

b. Look for areas where leaking of oil has left rock filler exposed, which indicates hydrocarbon leakage.

N/A

C.1.1.3 Oiled Dirt or Sand N/A

Check for settlement into the base which would direct runoff rainwater under the tank rather than away from it.

C. 1.1.4 Rock

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 tank is out of service.

N/A

C.1.1.5 Site Drainage

a. Check site for drainage away from the tank and associated piping and manifolds. X Drainage appears adequate

Tank 124 – API 653 Inspection APPENDIX A, Page 2

EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

b. Check operating condition of the dike drains.

X

The inspection team noted that the Tank 124 containment drain pipe had a steady water drip. The team noted that the valve was not completely snug. The valve was temporarily completely closed and the drip persisted. Service the valve so it positively seals.

C.1.1.6 Housekeeping

Inspect the area for buildup of trash, vegetation, and other flammables buildup. X

Minor amounts of organics identified in the containment area. Recommend removing organics from the containment area.

C.1.2 SHELLS

C.1.2.1 External Visual Inspection

a. Visually inspect for paint failures, pitting, and corrosion.

X Minor coating failure and corrosion were identified on the tank shell (approximately 25 locations; 1 sq. ft.

each). Recommend cleaning and recoating the affected areas.

b. Clean off the bottom angle area and inspect for corrosion and thinning on plate and weld.

X Minor coating failure and corrosion were identified on the edge of the floor projection (approximately 50 linear feet). Recommend cleaning and recoating the affected areas.

c. Inspect the bottom-to-foundation seal, if any. X Bottom sealant in acceptable condition.

C.1.2.2 Internal (Floating Roof Tank)

Visually inspect for grooving, corrosion, pitting, and coating failures.

N/A

C.1.2.3 Riveted Shell Inspection

a. Inspect external surface for rivet and seam leaks.

b. Locate leaks by sketch or photo (location will be lost when shell is abrasively cleaned for painting).

N/A

c. Inspect rivets for corrosion loss and wear. N/A

d. Inspect vertical seams to see if they have been full fillet lap-welded to increase joint efficiency.

N/A

e. If no record exists of vertical riveted seams, dimension and sketch (or photograph) the rivet pattern; number of rows, rivet size, pitch length, and note whether the joint is butt-riveted or lap-riveted.

N/A

Tank 124 – API 653 Inspection APPENDIX A, Page 3

EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

C.1.2.4 Wind Girder (Floating Roof Tanks) Note: Tank does not have a floating roof but is equipped with a wind girder.

a. Inspect wind girder and handrail for corrosion damage (paint failure, pitting, corrosion product buildup), especially where it occurs at tack-welded junction, and for broken welds.

X

Minor coating failure was identified on the wind girder (approximately 10% of the surface area; approximately 75 sq ft).

Recommend cleaning and recoating the affected areas.

b. Check support welds to shelf for pitting, especially on shell plates. X

Wind girder is welded directly to shell. No issues noted were accessible on the spiral staircase.

c. Note whether supports have reinforcing pads welded to shell. X Wind girder is welded directly to shell.

C.1.3 SHELL APPURTENANCES

C.1.3.1 Manways and Nozzles

a. Inspect for cracks or signs of leakage in weld joint at nozzles, manways, and reinforcing plates. X No cracks or signs of leakage identified.

b. Inspect for shell plate dimpling around nozzles, caused by excessive pipe deflection. X No dimpling identified.

c. Inspect for flange leaks and leaks around bolting. X No leaks at flange/bolts identified.

d. Inspect sealing of insulation around manways and nozzles. N/A

e. Check for inadequate manway flange and cover thickness on mixer manways.

No mixer manways present.

C.1.3.2 Tank Piping Manifolds

a. Inspect manifold piping, flanges, and valves for leaks. X No leaks identified.

b. Inspect firefighting system components. N/A

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

X No concerns noted.

d. Check for adequate thermal pressure relief of piping to the tank. X Relief valves are present around shell valves.

e. Check operation of regulators for tanks with purge gas systems. N/A

f. Check sample connections for leaks and for proper valve operation. N/A

g. Check for damage and test the accuracy of temperature indicators. N/A Tank is equipped with a temperature probe as part of ENRAF ATG system.

Tank 124 – API 653 Inspection APPENDIX A, Page 4

EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

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

C.1.3.3 Autogauge System Note: Autogauge is in reference to the tape gauge.

a. Inspect autogauge tape guide and lower sheave housing (floating swings) for leaks. X No indication of leaks.

b. Inspect autogauge head for damage. X No head damage identified.

c. Bump the checker on autogauge head for proper movement of tape. X

The tape gauge reading did not match the ENRAF ATG reading. Recommend servicing the tape gauge.

d. Identify size and construction material of autogauge tape guide (floating roof tanks). N/A

e. Ask operator if tape tends to hang up during tank roof movement (floating roof tanks). X Servicing the tape gauge is recommended.

f. Compare actual product level to the reading on the autogauge (maximum variation is 2 inches). X

The tape gauge reading did not match the ENRAF ATG reading. Recommend servicing the tape gauge.

g. On floating roof tanks, when the roof is in the lowest position, check that no more than 2 feet of tape is exposed at the end of the tape guide.

h. Inspect condition of board and legibility of board-type autogages. N/A

i. Test freedom of movement of marker and float. N/A

C.1.3.4 Shell-Mounted Samples Station Note: Tank is not equipped with shell-mounted sample stations.

a. Inspect sample lines for function of valves and plugging of lines, including drain or return-to-tank line.

b. Check circulation pump for leaks and operating problems. N/A

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

C.1.3.5 Heater (Shell Manway Mounted) N/A

Inspect condensate drain for presence of oil indicating leakage.

C.1.3.6 Mixer

a. Inspect for proper mounting flange and support. N/A

b. Inspect for leakage. N/A

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EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

c. Inspect condition of power lines and connection to mixer. N/A

C. 1.3.7 Swing Lines: Winch Operation

a. Nonfloating. Raise, then lower the swing line with winch, and check for cable tightness to confirm that swing line lowered properly.

b. Floating. With tank half full or more, lower the swing line, then let out cable and check if swing line has pulled cable tight, indicating that the winch is operating properly.

c. Indicator. Check that the indicator moves in the proper direction: Floating swing line indicators show a lower level as cable is wound up on the winch. Non-floating swing line indicators show the opposite.

C.1.3.8 Swing Lines: External Guide System

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

C.1.3.9 Swing Lines: Identify Ballast Varying Need

Check for significant difference in stock-specific gravity. N/A

C.1.3.10 Swing Lines: Cable Material and Condition

a. For non-stainless steel cable, check for corrosion over entire length.

b. All cable: check for wear or fraying. N/A

C.1.3.11 Swing Lines: Product Sample Comparison

Check for water or gravity differences that would indicate a leaking swing joint. N/A

C.1.3.12 Swing Lines: Target

Target should indicate direction of swing opening (up or down) and height above bottom where suction will be lost with swing on bottom support.

C.1.4 ROOFS

C.1.4.1 Deck Plate Internal Corrosion

For safety, before accessing the roof, check with ultrasonic instrument or lightly use a ball peen hammer to test the deck plate near the edge of the roof for thinning. (Corrosion normally attacks the deck plate at the edge of a fixed roof and the rafters in the center of the roof first.)

X

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EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

C.1.4.2 Deck Plate Exterior Corrosion

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

X Minor coating failure was identified on the roof plates (approximately 50 sq. ft.

total; approximately 25 spots which are 1

sq. ft. each, 5 to 10 sq. ft. by the ATG, and 5 to 10 sq. ft. by atmospheric vent-2.

Recommend cleaning and recoating the affected areas.

C.1.4.3 Roof Deck Drainage

Look for indication of standing water. (Significant sagging of fixed roof deck indicates potential rafter failure. Large standing water areas in a floating roof indicate inadequate drainage design or, if to one side, a nonlevel roof with possible leaking pontoons).

X No standing water was identified. Roof is cone up and drainage is generally adequate.

C.1.4.4 Level of Floating Roof

At several locations, measure distance from roof rim to a horizontal weld seam above the roof. A variance in the readings indicates a nonlevel roof with possible shell out-of-round, out-of-plumb, leaking pontoons, or hang-up. On small diameter tanks, an unlevel condition can indicate unequal loading at that level.

N/A

C.1.4.5 Gas Test Internal Floating Roof

Test for explosive gas on top of the internal floating roof. Readings could indicate a leaking roof, leaking seal system, or inadequate ventilation of the area above the internal floating roof.

N/A

C.1.4.6 Roof Insulation

a. Visually inspect for cracks or leaks in the insulation weather coat where runoff rainwater could penetrate the insulation.

N/A

b. Inspect for wet insulation under the weather coat.

N/A

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

N/A

C.1.4.7 Floating Roof Seal System

a. Measure and record maximum seal-to-shell gaps at:

N/A

1. Low pump out N/A

2. Mid-shell N/A

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EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

3. High liquid level N/A

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.

N/A

1. __________ _________ Opposite pair 1.

2. __________ _________ Opposite pair 2.

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

N/A

d. Inspect fabric for deterioration, holes, tears, and cracks.

N/A

e. Inspect visible metallic parts for corrosion and wear.

N/A

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

N/A

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

N/A

h. Pull both primary and secondary seal systems back all around the shell to check their operation.

N/A

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

N/A

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

N/A

C.1.5 ROOF APPURTENANCES

C.1.5.1 Sample Hatch

a. Inspect condition and functioning of sample hatch cover. X Manual gauging hatch cover in acceptable condition.

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

N/A

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

X

Minor coating failure was identified on the manual gauge hatch nozzle.

Recommend providing surface preparation and recoating the affected area.

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

Tank 124 – API 653 Inspection APPENDIX A, Page 8

EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

e. Check for reinforcing pad where sample hatch pipe penetrates the roof deck. X No concerns.

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

N/A

g. Test operation of system. N/A

h. On ultra clean stocks such as JP4, check for presence and condition of protective coating or liner inside sample hatch (preventing rust from pipe getting into sample).

N/A

C.1.5.2 Gauge Well

a. Inspect visible portion if the gauge well for thinning, size of slots, and cover condition.

N/A

b. Check for a hold-off distance marker and tab with hold-off distance (legible).

N/A

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

N/A

d. If accessible, check the distance from the gauge well pipe to the tank shell at different levels.

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

N/A

C.1.5.3 Fixed Roof Scaffold Support

Inspect scaffold support for corrosion, wear, and structural soundness. X

Tank is equipped with one painter's post.

Minor coating failure present.

Recommend cleaning and recoating the affected area.

C.1.5.4 Autogauge: Inspection Hatch and Guides (Fixed Roof)

a. Check the hatch for corrosion and missing bolts. N/A There is not an inspection hatch adjacent to the tape gauge.

b. Look for corrosion on the tape guides and float guide’s wire anchor. X

Minor coating failure identified on guide wire nozzles on tank roof. Recommend cleaning and recoating the affected areas.

C.1.5.5 Autogauge: Float Well Cover

c. Inspect for corrosion. N/A

d. Check tape cable for wear or fraying caused by rubbing on the cover.

Tank 124 – API 653 Inspection APPENDIX A, Page 9

EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

C.1.5.6 Sample Hatch (Internal Floating Roof)

a. Check overall conditions. N/A

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

N/A

c. When equipped with a recoil reel opening device, check for proper operations.

N/A

C.1.5.7 Roof-Mounted Vents (Internal Floating Roof)

Check condition of screens, locking, and pivot pins. N/A

C.1.5.8 Gauging Platform Drip Ring

On fixed roof tanks with drip rings under the gauging platform or sampling area, inspect for plugged drain return to the tank.

N/A

C.1.5.9 Emergency Roof Drain

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.

N/A

C.1.5.10 Removable Roof Leg Racks

Check for leg racks on roof. N/A

C.1.5.11 Vacuum Breakers

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.

N/A

C.1.5.12 Rim Vents

a. Check condition of the screen on the rim vent cover.

N/A

b. Check for plating off or removal of rim vents where jurisdictional rules do not permit removal.

N/A

C.1.5.13 Pontoon Inspection Hatches

a. Open pontoon inspection hatch covers and visually check inside for pontoon leakage.

N/A

b. Test for explosive gas (an indicator of vapor space leaks).

N/A

c. If pontoon hatches are equipped with locked down covers, check for vent tubes. Check that vent tubes are not plugged-up. Inspect lock-down devices for condition and operation.

C.1.6 Accessways See item C.2.12 below.

Tank 124 – API 653 Inspection APPENDIX A, Page 10

EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

C. 2.12 ACCESS STRUCTURES

C. 2.12.1 Handrails

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

X

The handrail system consists of 1 ½-inch diameter coated carbon steel piping for the top rail and midrail with 2-inch structural angle posts and a 4-inch kick plate.

b. Inspect for pitting and holes, paint failures.

Coating failure and corrosion was identified on the roof handrail system.

Recommend cleaning and recoating the affected areas.

c. Inspect attachment welds. X No indications identified.

d. Identify cold joints and sharp edges. Inspect the handrails and midrails. X No concern.

e. Inspect safety drop bar (or safety chain) for corrosion, functioning, and length. N/A

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.

C. 2.12.2 Platform Frame Top of spiral stair platform.

a. Inspect frame for corrosion and paint failure. X No concern.

b. Inspect the attachment of frame to supports and supports to tank for corrosion and weld failure. X No concern.

c. Check reinforcing pads where supports are attached to shell or roof. X No concern.

d. Inspect the surface that deck plate or grating rests on, for thinning and holes. X No concern.

e. Check that flat-surface-to flat-surface junctures are seal welded. N/A

C. 2.12.3 Deck Plate and Grating

a. Inspect deck plate for corrosion-caused thinning or holes (not drain holes) and paint failure. X The grating is galvanized steel, generally in good condition.

b. Inspect plate–to–frame wells for rust scale buildup. X No concern.

c. Inspect grating for corrosion-caused thinning of bars and failure of welds. X No concern.

d. Check grating tie-down clips. Where grating had been retrofitted to replace plate, measure the rise of the step below and above the grating surface and compare with other risers on the stairway.

X

No concern.

Tank 124 – API 653 Inspection APPENDIX A, Page 11

EEI Project No.: 9833

Tank No.: 124 Prepared by: MBM

C. 2.12.4 Stairway Stringers

a. Inspect spiral stairway stringers for corrosion, paint failure, and weld failure. Inspect attachment of stairway treads to stringer. X

The stairway system consists of galvanized steel components. The galvanized finish has failed on approximately 10% of the handrail system.

b. Inspect stairway supports to shell welds and reinforcing pads. X No concern.

c. Inspect steel support attachment to concrete base for corrosion. N/A

C. 2.12.5 Rolling Ladder

a. Inspect rolling ladder stringers for corrosion. N/A

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.

c. Check for wear and corrosion where rolling ladder attaches to gaging platform. N/A

d. Inspect pivot bar for wear and secureness. N/A

e. Inspect operation of self-leveling stairway treads. N/A

f. Inspect for corrosion and wear on moving parts. N/A

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

h. Inspect alignment of rolling ladder with roof track. N/A

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

j. Inspect rolling ladder track welds for corrosion. N/A

k. Inspect track supports on roof for reinforcing pads seal-welded to deck plate. N/A

l. Check by dimensioning, the maximum angle of the rolling ladder when the roof is on low legs.

Max angle __________________.

m. If rolling ladder track extends to within 5 feet of the edge of the roof on the far side, check for a handrail on the top of the shell on that side.

Tank 124 – API 653 Inspection APPENDIX A, Page 12

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Tank No.: 124 Prepared by: MBM

Additional Notes:

None.

APPENDIX B

Assessment of Compliance with Military Criteria

Tank 124 – API 653 Inspection APPENDIX B, Page 1

EEI Project No.: 9833

ASSESSMENT OF COMPLIANCE WITH MILITARY CRITERIA

UFC 3-460-01, Table 8-1

(Complete UFC available at www.wbdg.org) Requirements for Vertical Aboveground Storage Tank (V-A) Only

ITEM APPURTENANCE

(UFC REQUIREMENT)

COMPLIANT COMMENTS/RECOMMENDATION

(A blank in comments column indicates UFC compliance)

YES NO

MANHOLE

c A shell manhole located above the internal floating pan’s high position to aid in venting the tank during cleaning and to provide access to the floating pan’s elastomeric wiper seals as required by DoD Standard AW 78-24-27.

Tank is not equipped with an internal floating roof

(IFR).

Manhole above the floating pan is not required.

e Roof manholes in accordance with API Std

650. Locate the roof manholes near the perimeter of the roof at opposite ends of diameter and approximately 90 degrees from the shell manholes.

The roof is equipped with two 30-inch manways.

f Shell manholes in accordance with API Std

650. Two 36-inch shell manholes 180 degrees from each other. Align shell manholes parallel with prevailing wind direction. Support shell manhole covers by davits.

Tank is equipped with two 30-inch manholes.

Manhole covers are not supported by davits.

There is no compelling reason to upgrade the tank with 36 – inch manholes.

g A bolted cover in the roof for installation and removal of the internal floating pan as required by the tank supplier based on the pan manufacturer.

Tank is not equipped with an IFR.

There is no compelling reason to provide a cover.

INSPECTION HATCHES

h A minimum of four 24-inch square inspection hatches on fixed roof tanks with floating pans. Inspection hatches are not required for tanks without floating pans.

Tank is not equipped with an IFR.

There is no compelling reason to install hatches.

LADDER/STAIRS

i Internal ladders (in accordance with OSHA criteria) for tanks of 5,000 gallons or larger with floating pans.

Tank is not equipped with an IFR.

An internal ladder is not required.

k Ladders, railings, toeboards, a spiral stairway, top platform, and handrail in accordance with API Std 650 and OSHA requirements. Provide stairways to access high-level shut-off and alarms. Provide metal bar grating stair tread and platforms.

Provide stair tread with non-slip nosings.

Railings are equipped with toe boards.

http://www.wbdg.org/ccb/browse_cat.php?o=29&c=4

Tank 124 – API 653 Inspection APPENDIX B, Page 2

EEI Project No.: 9833

ASSESSMENT OF COMPLIANCE WITH MILITARY CRITERIA

UFC 3-460-01, Table 8-1

(Complete UFC available at www.wbdg.org) Requirements for Vertical Aboveground Storage Tank (V-A) Only

ITEM APPURTENANCE

(UFC REQUIREMENT)

COMPLIANT COMMENTS/RECOMMENDATION

(A blank in comments column indicates UFC compliance)

YES NO

LEVEL ALARMS

l An individual automatic level alarm system, independent of the gauging device or system for each tank. Include high, high-high, low and low-low level alarms.

Tank is equipped with a roof-mounted level alarm system independent of the ATG.

VENTS

m Open atmospheric vents with weather hoods and bird screens or pressure/vacuum vents in lieu of open vents. Comply with NFPA 30, host nation requirements, Chapter 2 of this UFC, API Std 650, API Std 2000, 29 CFR Part 1910.106, and DoD Standard Design AW 78-24-27, where applicable.

Tank is equipped with two 10-inch Open atmospheric vents elbowed down with bird screens.

Screens and bolting show minor corrosion.

p Emergency relief venting with capacity in accordance with NFPA 30 and UL 142, as applicable, or a weak roof-to-shell seam, as specified in API Std 650.

Tank has a frangible roof joint.

GAUGE/GAUGE HATCH/STILLING WELLS

q A liquid level gauge calibrated in 1/16-inch graduations mounted at 60 inches above the walking surface.

Tank is equipped with a Varec tape gauge system.

s Automatic Tank Gauging (ATG) for all tanks with fuel managed through the Defense Logistics Agency's Business Modernization {BSM Enterprise Resource Programs (ERP) - Fuels section}, that complies with API MPMS Chapter 3.

Tank is equipped with an ENRAF ATG.

v One 10-inch roof flanged nozzle with an 8-inch aluminum, fully slotted, stilling well for ATG near the edge of the roof near the top of the stairway platform.

Tank has been provided with an 8-inch stilling well that contains the ENRAF ATG displacer and the temperature probe.

w One 8-inch roof flanged nozzle with a 6-inch…