Attach 2 RFI 009 Specification Appendix 2.pdf

ABOVEGROUND STORAGE TANK

External Steel Tank Institute (STI) Tank Inspections

Bancroft – No. 2 Fuel Tanks #1, #2, #3 and Diesel Tank #4 100 Emancipation Dr.

Hampton, VA 23667

Service Provided By:

GENESIS ENVIRONMENTAL SOLUTIONS, INC.

8422 SOUTH 7 HIGHWAY

BLUE SPRINGS, MISSOURI 64014

OFFICE 816-229-5900 / FAX 816-229-4495

mgonser Snapshot

TABLE OF CONTENTS

Page Inspection Overview 3 Tank Farm System Inspection 4 – 10 Tank #1 11 Tank #2 12 Tank #4 13 Recommendations for Repair 14 Inspection Disclaimer 14 Appendix A 15

Appendix A

STI SP001 – AST Record STI SP001 – Monthly Inspection Checklist STI SP001 – Annual Inspection Checklist

ABOVE GROUND STORAGE TANK (AST) INSPECTION

Inspection Guidelines:

Steel Tank Institutes, SP001 - “Standard for the Inspection of Above ground Storage Tanks”.

Inspection Date:

4/5/2023

Inspector:

Drew Phelps – STI Inspector No: AC44200

Tank Inspection Category:

The tanks being inspected were (3) Horizontal Storage Tanks with Tanks #1 and #2 being Single Wall and Tank#3 being Double Wall. These tanks were located inside concrete dike containment with concrete foundation and supported on integrated steel saddles. These tanks were Category 1 under Steel Tank Institute (STI) SP001 standards. These tanks were being inspected as a Formal External Inspection. Next Formal External Inspection schedule in 5 years to obtain corrosion rates.

Inspection of the following tanks: (Refer to Exhibits for tank number identification)

Facility Tank Data Collection:

There was no previous data available.

FUTURE RECORD KEEPING

Included in this report package are AST Records (Appendix A), Monthly Inspection Checklists (Appendix B) and Annual Inspection Checklists (Appendix C). These forms and checklist should be accomplished as scheduled and kept on file.

On-Site Worker: Safety Qualifications:

All Genesis Environmental Solutions, Inc. employees have received training as mandated by Federal Labor (Occupational Safety and Health Administration – (OSHA)) requirements.

Tank Identification Product Volume (Approx.)

Tank #1 #2 Fuel 30,000 Gallons Tank #2 #2 Fuel 30,000 Gallons Tank #4 Diesel 2,000 Gallons mgonser Snapshot

ABOVE GROUND STORAGE TANK (AST) INSPECTION

External Tank System Inspection Scope:

A visual external inspection of the site tank systems was conducted. This inspection included piping, venting, tank accessories, containment, and external tank shell conditions.

Tank Farm System External Inspection:

Fire Valves: PEI/RP 200-19 Section 7.3 N/A; there were no nozzles below liquid level associated with these tank systems. Tanks containing a Class I or Class II flammable liquid should have fire valves on all nozzles below liquid level.

Piping and Fittings: ASME B31 The piping and fittings of these tank systems were above grade and below grade inside a concrete trench with a steel grate covering. The coating of the piping and fittings were observed to be chipped and scraped in areas throughout. In the areas where the coating had failed to bare metal there was surface corrosion present. The piping and fittings otherwise appeared to be in satisfactory condition showing no visible signs of leaking or misalignment.

Piping and Fittings General Condition

Grounding and Bonding: PEI/RP 200-19 13.7 There was no grounding or bonding observed for these tank systems. Tanks should be protected from static accumulation through grounding and bonding.

Overfill Protection: PEI/RP 200-19 8.2.3 Tanks #1 and #2 were equipped with observation ports at the top of the tanks that can be monitored by site personnel during the filling process for overfill protection. Tank #2 was observed to have an electronic tank gauge with a high-level alarm. The product level can be monitored by site personnel during filling operations for overfill protection. The high-level alarm can be seen and heard by site personnel or the delivery driver during the filling process for overfill protection. Tanks should only be filled to 90% of their capacity to prevent damage to the tank.

Observation Port, Electronic Tank Gauge, and High-Level Alarm General Conditions

Spill Prevention: PEI/RP 200-19 8.2.2 The fill site for tanks #1 and #2 was located above concrete containment for spill prevention during the filling process. The fill site for tank #4 was equipped with a spill bucket for spill prevention during the filling process.

Spill Prevention General Conditions

Emergency Shut Off: PEI/RP 200-19 13.4 N/A; there were no dispensing devices associated with these tank systems.

Tank Spacing: PEI/RP 200-19 2.4 – NFPA 30 (22.4.1.1) These tanks meet PEI and NFPA spacing requirements. Tanks need to meet a minimum of 3 feet between the other tanks and structures.

Tank Signage: NFPA 704 There were no NFPA 704 Emergency Response Placards observed for tanks #1 and #2. There was an NFPA 704 Emergency Response Placard observed on the side of tank #4, the placard was observed to be faded but legible.

NFPA 704 Emergency Response Placards should be placed on the side of the tanks or containment/building leading to the tanks visible to emergency response personnel.

NFPA 704 Emergency Response Placard General Condition

Confined Space Labels: 29 CFR 1910.146 There were no confined space labels observed for the tank entries associated with tank systems #1 and #2. There was no tank entry associated with tank #4. Confined Space Labels should be placed on or near each tank entry.

No Confined Space Labels

Anchoring: PEI RP-200-19 3.9 – NFPA 30 (4.3.1.4) There was anchoring observed for tanks #1 and #2, there was no anchoring observed for tank #4. The anchoring systems associated with tanks #1 and #2 appeared to be in satisfactory condition showing no visible signs of obvious defects. Tanks should be anchored using sound engineering practices.

Tank Roof: 40 CFR 63.902 N/A; these tanks were all horizontal.

External Tank Coating Inspection: STI – SP001 (PEI/RP-200 11.3) The external coatings associated with tanks #1 and #2 were observed having many areas of cracks, chips, and scrapes throughout. In the areas where the coating had failed to bare metal, there was minor surface corrosion present. Tank #2 was observed to have a faded appearance with areas of chips, scrapes, and degradation mainly around the nozzles. Clean and recoat areas of failed coatings to restore full function of the coatings and prevent further corrosion to the external areas of the tanks.

Tank #1 External Coating General Condition

Tank #2 External Coating General Condition

Tank #4 External Coating General Conditions

Primary Venting and Emergency Venting: STI – SP001 (PEI/RP 200-19 8.5.1, 8.5.2) Tanks #1 and #2 were observed to have primary venting but no emergency venting. The primary vents were noted to be missing screens to help prevent blockages from birds and insects but otherwise appeared to be in satisfactory condition showing no visible signs of blockages and were of adequate size. Tank #4 was observed to have weighted emergency venting for the primary tank and interstitial space but no primary venting. The weighted emergency vents were checked for functionality, no defects were noted. These tanks are required to have primary venting and emergency venting of adequate size.

Venting General Conditions

Ladders: 29 CFR 1910.27 The ladder and platform associated with tanks #1 and #2 was observed to have areas of chips and scrapes. In the areas where the coating had failed to bare metal there was surface corrosion present. The ladder and platform otherwise appeared to be in satisfactory condition showing no visible signs of obvious defects.

Ladder and Platform General Conditions

Containment and Foundation: STI – SP001 (PEI/RP 200-19 3, 4) These tanks were located inside concrete dike containment with concrete foundation and supported on integrated steel saddles. The concrete dike and foundation were observed to have a few small cracks and contained water at the time of inspection. The containment and foundation otherwise appeared to be in satisfactory condition showing no visible signs of major cracking or spalling. Any cracks found greater than 1/16” should be sealed/repaired using sound engineering practices. The integrated steel saddles associated with tanks #1 and #2 were noted to have areas at the top without weld material allowing rainwater intrusion and creating an area where corrosion rates could accel rapidly without notice. There was an electrical outlet attached to the containment wall that was noted being an open circuit and lacking a GFCI.

Containment and Foundation General Conditions

EXTERNAL TANK INSPECTIONS

TANK INSPECTION ULTRASONIC THICKNESS TESTING – TANK #1

The inspector conducted an initial visual inspection of the tank and tank system. The entire circumference of the tank was examined closely. The tank shell courses and heads had no visible signs of any major corrosion or pitting and were sound. Once the visual was conducted, the inspector conducted baseline Ultrasonic Thickness Testing (UTT) on the tank shell and heads to determine the original metal thicknesses.

Readings collected from the tank shell and heads indicated a manufacture thickness of approximately 0.3125” on the shell and heads. The inspector then conducted UTT randomly on the tank shell and heads looking for any deviation in thickness from the baseline readings collected.

Readings collected on the tank shell metal ranged from 0.299” – 0.314”. It was determined that the tank shell metal had no indications of any significant metal thickness loss.

Readings collected on the tank heads metal ranged from 0.312” – 0.315”. It was determined that the tank heads metal had no indications of any significant metal thickness loss.

Overall Evaluation: This tank is in serviceable condition and suitable for continued use after the installation of an emergency vent.

TANK INSPECTION ULTRASONIC THICKNESS TESTING – TANK #2

The inspector conducted an initial visual inspection of the tank and tank system. The entire circumference of the tank was examined closely. The tank shell courses and heads had no visible signs of any major corrosion or pitting and were sound. Once the visual was conducted, the inspector conducted baseline Ultrasonic Thickness Testing (UTT) on the tank shell and heads to determine the original metal thicknesses.

Readings collected from the tank shell and heads indicated a manufacture thickness of approximately 0.3125” on the shell and heads. The inspector then conducted UTT randomly on the tank shell and heads looking for any deviation in thickness from the baseline readings collected.

Readings collected on the tank shell metal ranged from 0.298” – 0.317”. It was determined that the tank shell metal had no indications of any significant metal thickness loss.

Readings collected on the tank heads metal ranged from 0.306” – 0.316”. It was determined that the tank heads metal had no indications of any significant metal thickness loss.

Overall Evaluation: This tank is in serviceable condition and suitable for continued use after the installation of an emergency vent.

TANK INSPECTION ULTRASONIC THICKNESS TESTING – TANK #4

After the external visual inspection of the tank and external piping, valves and floats, the inspector conducted Ultrasonic Thickness Testing (UTT) on the tank shell and heads to determine the original tank metal thickness.

Note that this is a double wall tank, and the primary tank metal could not be accessed for testing. Ultrasonic Thickness Testing was performed on the secondary tank metal only.

Secondary tank readings collected indicated a manufactured wall thickness of approximately 0.1345” on the secondary tank shell metal, and approximately 0.1793” on the tank heads metal. The inspector then conducted UTT randomly on the secondary tank shell and heads metal looking for any deviation in thickness from the baseline readings collected.

Readings on the secondary tank shell metal ranged in thickness from 0.133” – 0.137”. It was determined that the secondary tank shell metal had no indications of any significant metal thickness loss.

Readings on the secondary tank heads metal ranged in thickness from 0.174” – 0.177”. It was determined that the secondary tank heads metal had no indications of any significant metal thickness loss.

Overall Evaluation: This tank is in serviceable condition and suitable for continued use.

Recommendations for Repair:

1. Install Emergency venting on tanks #1 and #2 of adequate size using sound engineering practices.

2. Need to install a natural vent on tank #4.

3. Attach NFPA 704 Placards to the side of tanks #1 and #2 or containment leading to the tanks visible to emergency response personnel.

4. Attach Confined Space Labels on or near each tank entry associated with tanks #1 and #2.

5. Clean and recoat all areas of failed coatings found.

6. Add weld material or other means of diverting water from the shell to saddle areas of Tanks #1 and #2.

7. Empty the containment after each rain event.

8. Seal any cracks in the concrete containment and foundation found >1/16” using sound engineering practices.

9. Replace open circuit outlet with a covered GFCI outlet.

10. Install grounding and bonding to protect tanks from static accumulation and discharge.

Genesis Environmental Solutions, Inc. has evaluated the condition of these tanks based on observations and measurements made by the inspector. While our evaluation accurately describes the condition of the tank at the time of inspection, the tank owner/operator must independently assess the inspection information provided by Genesis and any conclusions reached by the tank owner/operator and any action taken or omitted to be taken are the sole responsibility of the owner/operator. With respect to inspection and testing, Genesis warrants only that the services have been performed in accordance with accepted industry practice.

Appendix A

STI SP001 – AST Record

STI SP001 – Monthly Inspection Checklist

STI SP001 – Annual Inspection Checklist

AST Record Page 1 of 2

STI SP001 AST Record

Form completed by (Name) Date

(Title)

OWNER INFORMATION FACILITY INFORMATION INSTALLER INFORMATION

Name Name Name

Number and Street Number and Street Number and Street

City, State, Zip Code City, State, Zip Code City, State, Zip Code

Regulatory facility ID number (if applicable)

OWNER’S TANK ID

OTHER ID

INITIAL SERVICE DATE

Manufacturer: Contents: Construction Date: Last Repair/Reconstruction Date:

Dimensions: Capacity: Last Change of Product Date:

Design: UL SwRI API Other Unknown

Horizontal Vertical Rectangular

Construction: Bare Steel Cathodically Protected (Check one: A. Galvanic or B. Impressed Current) Date Installed:

Coated Steel Concrete encased steel Stainless steel Other

Double-Bottom Double-Wall Lined inside; Date lining installed:

Spill control: Earthen Dike Steel Dike Concrete

None Other

CRDM: yes no

If yes, type: Release Prevention Barrier Elevated tank Double bottom tank

Double wall tank CE-AST other

Tank elevated on supports yes no

Support material: steel concrete other

Release Prevention Barrier: yes no If yes, Date Installed:

If yes, Type: concrete synthetic liner clay liner steel other

AST Category: Category 1 Category 2 Category 3

AST Record Page 2 of 2

Construction: Bare Steel Cathodically Protected (Check one: A. Galvanic or B. Impressed Current) Date Installed:

Construction: Bare Steel Cathodically Protected (Check one: A. Galvanic or B. Impressed Current) Date Installed:

Monthly Checklist

STI SP001 Monthly Inspection Checklist

General Inspection Information:

Inspection Date: Prior Inspection Date: Retain until date:

Inspector Name (print): Title:

Inspector’s Signature

Tank(s) inspected ID

Regulatory facility name and ID number (if applicable)

Inspection Guidance:

This checklist is intended as a model. Locally developed checklists are acceptable as long as they are substantially equivalent (as applicable). Inspections of multiple tanks may be captured on one form as long as the tanks are substantially the same.

For equipment not included in this Standard, follow the manufacturer recommended inspection/testing schedules and procedures.

The periodic AST Inspection is intended for monitoring the external AST condition and its containment structure. This visual inspection does not require a Certified Inspector. It shall be performed by an owner’s inspector per paragraph 4.1.2 of the standard.

Upon discovery of water in the primary tank, secondary containment area, interstice, or spill container, remove promptly or take other corrective action. Inspect the liquid for regulated products or other contaminants and dispose of properly.

Non-conforming items important to tank or containment integrity require evaluation by an engineer experienced in AST design, a Certified Inspector, or a tank manufacturer who will determine the corrective action. Note the non-conformance and corresponding corrective action in the comment section.

Retain the completed checklists for at least 36 months.

After severe weather (snow, ice, wind storms) or maintenance (such as coating) that could affect the operation of critical components (normal and emergency vents, valves), an inspection of these components is required as soon as the equipment is safely accessible after the event.

ITEM

STATUS

COMMENTS / DATE CORRECTED

Tank and Piping

Is tank exterior (roof, shell, heads, bottom, connections, fittings, valves, etc.) free of visible leaks?

Note: If "No", identify tank and describe leak and actions taken.

□ Yes □ No

Is the tank liquid level gauge legible and in good working condition?

□ Yes □ No □ N/A

3 Is the area around the tank (concrete surfaces, ground, containment, etc.) free of v is ible signs of leakage?

Monthly

Is the primary tank free of water or has another preventative measure been taken? NOTE:

Refer to paragraphs 6.10 and 6.11 of the standards for alternatives for Category 1 tanks.

N/A is only appropriate for these alternatives.

For double-wall or double bottom tanks or CE-ASTs, is interstitial monitoring equipment (where applicable) in good working condit ion?

6 For double-wall tanks or double bottom tanks or CE-ASTs, is interstice free of liquid?

Remove the liquid if it is found. If tank product is found, investigate possible leak.

Equipment on tank

7 If overfill equipment has a “test” button, does it activate the audible horn or light to confirm operation? If battery operated, replace battery if needed.

Is overfill prevention equipment in good working condition? If it is equipped with a mechanical test mechanism, actuate the mechanism to confirm operation.

9 Is the spill container (spill bucket) empty, free of visible leaks and in good w o r k i n g condition?

10 Are piping connections to the tank (valves, fittings, pumps, etc.) free of visible l e a k s ?

Note: If "No", identify location and describe leak.

Do the ladders/platforms/walkways appear to be secure with no sign of severe corrosion or damage?

Containment (Diking/Impounding)

Is the containment free of excess liquid, debris, cracks, corrosion, erosion, fire hazards and other integrity issues?

Are dike drain valves closed and in good working condition?

Are containment egress pathways clear and any gates/doors operable?

Concrete Exterior AST (CE-AST)

15 Inspect all sides for cracks in concrete. Are there any cracks in the concrete exterior larger than 1/16”?

16 Inspect concrete exterior body of the tank for cleanliness, need of coating, or rusting where applicable. Tank exterior in acceptable condition?

Visual inspect all tank top openings including nipples, manways, tank top overfill containers, and leak detection tubes. Is the sealant between all tank top openings and concrete intact and in good condition?

Other Conditions

18 Is the system free of any other conditions that need to be addressed for continued safe operation?

Monthly Checklist Page 3 of 3

Additional Comments:

Annual

STI SP001 Annual Inspection Checklist

Inspector’s Signature:

Tank(s) inspected ID

This checklist is intended as a model. Locally developed checklists are acceptable as long as they are substantially equivalent (as applicable).

For equipment not included in this Standard, follow the manufacturer recommended inspection/testing schedules and procedures.

The periodic AST Inspection is intended for monitoring the external AST condition and its containment structure. This visual inspection does not require a Certified Inspector. It shall be performed by an owner’s inspector per paragraph 4.1.2 of the standard.

Remove promptly standing water or liquid discovered in the primary tank, secondary containment area, interstice, or spill container. Before discharge to the environment, inspect the liquid for regulated products or other contaminants and disposed of it properly.

In order to comply with EPA SPCC (Spill Prevention, Control and Countermeasure) rules, a facility should regularly test liquid level sensing devices to ensure proper operation (40 CFR 112.8(c)(8)(v)).

Non-conforming items important to tank or containment integrity require evaluation by an engineer experienced in AST design, a Certified Inspector, or a tank manufacturer who will determine the corrective action. Note the non-conformance and corresponding corrective action in the comment section.

Retain the completed checklists for at least 36 months.

Complete this checklist on an annual basis, supplemental to the owner monthly-performed inspection checklists.

Note: If a change has occurred to the tank system or containment that may affect the SPCC plan, the condition should be evaluated against the current plan requirement by a Professional Engineer knowledgeable in SPCC development and implementation.

ITEM

STATUS

COMMENTS / DATE CORRECTED

Tank Foundation/Supports

Free of tank settlement or foundation washout? □Yes □No

2 Concrete pad or ring wall free of cracking and spalling?

□Yes □No □N/A

Tank supports in satisfactory condition? □Yes □No □N/A

Is water able to drain away from tank if tank is resting on a foundation or on the ground?

5 Is the grounding strap between the tank and foundation/supports in good condition? □Yes □No □N/A

Tank Shell, Heads and Roof

6 Free of visible signs of coating failure? □Yes □No

7 Free of noticeable distortions, buckling, denting, or bulging?

□Yes □No

8 Free of standing water on roof? □Yes □No □N/A

9 Are all labels and tags intact and legible? □Yes □No

Tank Manways, Piping, and Equipment

10 Flanged connection bolts tight and fully engaged with no sign of wear or corrosion?

Tank Equipment

11 Normal and emergency vents free of obstructions? □Yes □No

Normal vent on tanks storing gasoline equipped with pressure/vacuum vent?

13 Are flame arrestors free of corrosion and are air passages free of blockage?

Is the emergency vent in good working condition and functional, as required by manufacturer? Consult manufacturer’s requirements. Verify that components are moving freely (including long-bolt manways).

Is interstitial leak detection equipment in good condition? Are windows on sight gauges clear? Are wire connections intact? If equipment has a test function, does it activate to confirm operation?”

Are all valves free of leaks, corrosion and other damage? Follow manufacturers’ instructions for regular maintenance of these items. Check the following and verify (as applicable):

□ Anti-siphon valve

□ Check valve

□ Gate valve

□ Pressure regulator valve

□ Expansion relief valve

□ Solenoid valve

□ Fire valve

□ Shear valve

□Yes □No □N/A □Yes □No □N/A □Yes □No □N/A

17 Are strainers and filters clean and in good condition? □Yes □No □N/A

Insulated Tanks

Free of missing insulation?

Insulation free of visible signs of damage?

Insulation adequately protected from water intrusion?

19 Insulation free of noticeable areas of moisture? □Yes □No □N/A

20 Insulation free of mold? □Yes □No □N/A

21 Free of visible signs of coating failure? □Yes □No □N/A

Tank / Piping Release Detection

22 Is inventory control being performed and documented if required? □Yes □No □N/A

Is release detection being performed and documented if required?

Other Equipment

24 Are electrical wiring and boxes in good condition? □Yes □No □N/A

Has the cathodic protection system on the tank been tested as required by the designing engineer?

Annual Checklist Page 4 of 4

Additional Comments:

Portable Container

STI SP001 Portable Container Monthly Inspection Checklist

Inspector’s Signature ():

Container(s) inspected ID

This checklist is intended as a model. Locally developed checklists are acceptable as long as they are substantially equivalent (as applicable).

This periodic Inspection is intended for monitoring the external condition and its containment structure. This visual inspection does not require a Certified Inspector. It shall be performed by an owner’s inspector who is familiar with the site and can identify changes and developing problems. Note the non-conformance and corresponding corrective action in the comment section.

Retain the completed checklists for at least 36 months.

Item Area: Area: Area: Area:

Portable Container Containment/Storage Area 1 Are all portable container(s) within designated storage area?

2 Is the containment and storage area free of excess liquid, debris, cracks or fire hazards?

3 Are drain valves closed and in good working condition?

Yes No N/A

4 Are containment egress pathways clear and any gates/doors operable?

Container 5 Is the container free of leaks?

Note: If "No", identify container and describe leak.

6 Is the container free of distortions, buckling, denting or bulging?

Portable Container Checklist Page 2 of 2

Comments:

VA Medical Center Hampton, VA

Report No.: Rprt 23059.23049.TNK3

Inspector : Jeff Walling

Employer : Genesis Integrity Inspections

Inspection Date : 6/8/2023

IN-SERVICE

Inspection Report For

Tank #3

Diesel (#2 FO)

A Mechanical Integrity Inspection following the API-653 Standard guidelines was completed on Tank #3 at the VA Medical Center site located in Hampton, VA on 6/8/2023. The inspection was conducted in accordance with the client criterion for NDE which included Visual (VT) and Ultrasonic Thickness (UT) examinations. The tank was built to an unknown specification for AST tanks for storing Diesel FO. This inspection was conducted in accordance with the requirements of the API-653 standard. The following is a detailed report of the inspection including findings and recommendations.

Inspector Signature API Certification No. 2071 Page 1

1.0 EXECUTIVE SUMMARY

2.0 VESSEL DATA

3.0 INSPECTION RESULTS

3.1 Foundation

3.2 Shell

3.3 Nozzles

3.4 Roof

3.5 Floor

3.6 Ancillary Equipment

3.7 Other

4.0 RECOMMENDATIONS

4.1 Foundation

4.2 Shell

4.3 Nozzles

4.4 Roof

4.5 Floor

4.6 Ancillary Equipment

4.7 Other

4.8 Next Inspections

5.0 ULTRASONIC THICKNESS (UT) MEASUREMENTS

5.1 Results Summary

5.2 Recommendations

APPENDICES APPENDIX A Thickness Measurement Record

APPENDIX B Mechanical Integrity Calculation

APPENDIX C Inspection Drawings

APPENDIX D Inspection Checklist

APPENDIX E Inspection Photographs

APPENDIX G

NDE Records and Certifications

Supplementary

APPENDIX F A

A Mechanical Integrity Inspection following the API-653 Standard guidelines was completed on Tank #3 at the VA Medical Center site located in Hampton, VA on 6/8/2023. This inspection was conducted to collect data in order to evaluate the mechanical integrity and fitness for continued service of the tank.

The shell has areas of coating failure and corrosion nodes about the tank.

Recommendation: Clean areas of coating failure & corrosion nodes and evaluate the extent of wall loss. If within the allowable tolerances, coat as need to restore the tank to 100% coverage. If not within tolerance (below the calculated tmin), have a tank repair company evaluate and outline a repair plan.

The tank does not have an Emergency Vent (EV). Recommendation: Install a 24" Emergency Vent (EV) or as an option, modify the existing 24" roof MW to be fitted with an EV cap (reference App. G).

A UT examination of tank secondary shell components were completed on all accessible surfaces. UT results show no significant wall loss due to general internal corrosion.

Next Inspection per API-653 Guidelines:

Next UT Inspection: 6/8/2038 Next External Inspection: 6/8/2028 Next Internal Inspection: Unknown

2.0 TANK DATA

Equip. ID: Product:

City/State: Capacity: (Gal):

Client: Specific Gravity:

State ID: Fill Height (ft):

Inspection Date: Corr. Allow.(Ca):

Type Inspection: Joint Eff.:

Test Methods: Plate Spec:

Diesel (#2 FO)

150,000

0.89

49.0

0.7

CS Unknown

Manufacturer: Roof/Head 1 t (inch): 0.500

Year Built: Bttm/Head 2 t (inch): 0.375

Const. Code: Course 1 t (inch): 0.375

Diameter/Width (ft): Course 2 t (inch): 0.375

Height (ft): Course 3 t (inch): 0.375

Length (ft): Course 4 t (inch): 0.375

Shell Const:

Roof Type:

Foundation:

Insulation Type:

Insul.Tk.(in):

Leak Detection

Tank #3

Hampton, VA

VA Medical Center

NA

6/8/2023

IN-SERVICE

Visual & UT

Unknown

Unknown (used 2003)

Unknown

50.0

32.0

Butt Welded

Fixed/Cone

Concrete Pad

NA

Passive (Concrete Pad)

3.0 INSPECTION RESULTS

The following results are the summarization of a field checklist that was utilized during the inspection of Tank #3

3.1 Foundation:

3.1.1 The foundation is constructed of a concrete pad. The foundation has a few cracks about the tank.

3.2 Shell:

3.2.1 The shell has areas of coating failure and corrosion nodes about the tank.

3.3 Nozzles:

3.3.1 The shell nozzles appear to be in satisfactory mechanical condition.

3.3.2 The tank does not have an Emergency Vent (EV).

3.3.3 The tank has a 6" normal vent with a flame arrester that appears to be in satisfactory mechanical condition.

3.4 Roof:

3.4.1 The roof has areas of coating failure and corrosion.

3.5 Floor:

3.5.1 Not inspected at this time. The chime appeared to be in satisfactory mechanical condition.

3.6 Ancillary Equipment:

3.6.1 The containment piping appeared to be in satisfactory mechanical condition.

The piping has areas of coating failure and corrosion.

3.7 Other:

3.7.1 NA

4.0 RECOMMENDATIONS

4.1 Foundation:

4.1.1 Seal coat the foundation cracks about the tank.

4.2 Shell:

4.2.1 Clean areas of coating failure & corrosion nodes and evaluate the extent of wall loss. If within the allowable tolerances, coat as need to restore the tank to 100% coverage. If not within tolerance (below the calculated tmin), have a tank repair company evaluate and outline a repair plan.

4.3 Nozzles:

4.3.1 Install a 24" Emergency Vent (EV) or as an option, modify the existing 24" roof MW to be fitted with an EV cap.

4.4 Roof:

4.4.1 Clean and coat areas of coating failure & surface oxidation to restore the roof to 100% coverage.

4.5 Floor:

4.5.1 None.

4.6 Ancillary Equipment:

4.6.1 Clean and coat areas of coating failure & surface oxidation on the containment piping to restore the roof to 100% coverage.

4.7 Other:

4.7.1 NA.

4.8 Next Inspections:

4.8.1 Next internal inspection is due by: Unknown

4.8.2 Next External inspection is due by: 06/08/2028

4.8.3 Next UT inspection is due by: 06/08/2038

4.8.4 Governing component limiting life: Shell

5.0 ULTRASONIC THICKNESS (UT) MEASUREMENTS

5.1 Results Summary:

5.1.1 A UT examination of tank components were completed on all accessible surfaces. UT results show no significant wall loss due to general internal corrosion.

5.2 Recommendations:

5.2.1 Re-inspect the Tank with UT technology in 15 years per API-653 guidelines.

APPENDIX A

Thickness Measurement Record

1) Component TML Record

2) Nozzle TML Record

AST Storage Tank Evaluation

AST Component Inspection Data Report No. Client Inspector Tank No. Date

Rprt 23059.23049.TNK3 VA Medical Center Jeff Walling Tank #3 6/8/2023

Component Thickness Measurements in (inch)

CML Component Location tml-1 tml-2 tml-3 tml-4 tml-5 tml-6 Minimum 1 Shell Crs 1 Chm NE 0.376 0.376 0.380 0.378 0.370 0.370 0.370

2 Shell Crs 1 Chm SW 0.368 0.366 0.372 0.374 0.378 0.386 0.366

3 Shell Crs 1 Drop 1 (W) 0.376 0.378 0.380 0.376

4 Shell Crs 1 Drop 2 (N) 0.376 0.374 0.372 0.372

5 Shell Crs 1 Drop 3 (E) 0.374 0.374 0.372 0.372

6 Shell Crs 1 Ldr Drop 0.370 0.368 0.372 0.368

7 Shell Crs 2 Ldr Drop 0.388 0.388 0.384 0.384

8 Shell Crs 3 Ldr Drop 0.380 0.382 0.384 0.380

9 Shell Crs 4 Ldr Drop 0.386 0.386 0.384 0.384

10 Roof NS 0.528 0.531 0.531 0.518 0.516 0.524 0.516

11 Roof EW 0.532 0.532 0.528 0.520 0.536 0.520 0.520

12 Floor Chime 0.540 0.484 0.484

API-653 STORAGE TANK EVALUATION

Nozzle Inspection Data

Rprt

23059.23049.TNK3 VA Medical Center Jeff Walling Tank #3 6/8/2023

Nozzle Thickness Measurements in (inch)

Components with Vert. Axis: tml-1 N., tml-2 E., tml-3 S., tml-4 W. (Drawing N.)

Component with Horz. Axis:tml-1 Top, tml-2 Side, tml-3 Bttm., tml-4 Side (Clock Wise)

CML # Comp. ID Size Location Service tml-1 tml-2 tml-3 tml-4 Minimum 13 24" MW 24 MW1 Maway 0.400 0.412 0.362 0.404 0.362 14 3" Nozzle 3 A Prod 0.224 0.230 0.228 0.224 15 2" Nozzle 2 B Prod 0.206 0.204 0.200 0.198 0.198 16 3" Nozzle 3 C Prod 0.214 0.210 0.210 17 2" Nozzle 2 D Prod 0.188 0.194 0.188 18 3" Nozzle 3 E Prod 0.254 0.254 0.242 0.242 19 3" Nozzle 3 F Ovr Flow 20 24" MW 24 MW2 Maway 0.250 0.250 0.254 0.250 0.250 21 6" Nozzle 6 G Vent 0.282 0.264 0.268 0.264 22 1.5" Nozzle 1.5 H Sample Port 0.136 0.128 0.134 0.128 23 2" Nozzle 2 I Sensor

APPENDIX B

Mechanical Integrity Calculation

1) AST Shell RL Calculations

2) AST Roof RL Calculations

3) Nozzle RL Calculations

Tank Shell Minimum Thickness and Remaining Life Calculations Date 6/8/2023

File No. Report No. Client Tank No. Temp. (deg F) Initials

Rprt

23059.23049.TNK

VA Medical Center Tank #3 150 Jeff Walling

SHELL MINIMUM THICKNESS CALCULATIONS

tmin =

2.6(H-1)DG

SE

Where:

H = The height above the bottom of the course of study to the maximum liquid level height of the product, in ft. For corroded or pitted areas, H = the height from the bottom of the corroded or pitted area to the maximum liquid level height of the product, in ft.

tmin = The calculated minimum acceptable shell thickness, in inch (cannot be less than

0.100 inch for any course). The minimum acceptable shell thickness allowed by API-653 and STI-SP001 for tank size, in inch.

D = Nominal diameter of tank, in ft.

G = Highest specific gravity of the contents (including test water if tank will, or may, be tested in the future).

S = Maximum allowable stress, in psi. For welded tanks; use the smaller of 0.80Y of 0.429T for bottom and second course or the smaller of 0.88Y or 0.472T for all other courses. For riveted tanks; S = 21000 psi. For STI Tank Inspections S = 26000 psi (E = 1)

Y = Specified minimum yield strength of the plate, in psi; use 30000 psi if not known (N/A for riveted tanks).

T = The smaller of the specified minimum tensile strength of the plate or 80000 psi; use 55000 psi if not known (N/A for riveted tanks).

E = Original joint efficiency for the tank. For welded tanks; use API-653, Table 2-1 ; use E =

1.0 when evaluating the retirement thickness in a corroded plate, when away from welds or joints by at least the greater of one inch or twice the plate thickness. For riveted tanks; use E = 1.0 for shell plates greater than 1.000 inch away from rivets; use the value of E from API- 653 Table 2-1 when within 1.000 inch of rivets. For STI Tank Inspections E = 1 where S = 26000 psi.

D (ft) 50.00 G 0.89 E 0.7 Fill Height (ft) 49.0

Material Crs H (ft) H (ft) S (psi) tmin (inch)

Course 1 CS Unknown 8.00 49.00 23600 0.336

Course 2 CS Unknown 8.00 41.00 23600 0.280

Course 3 CS Unknown 8.00 33.00 26000 0.203

Course 4 CS Unknown 8.00 25.00 26000 0.153

Rprt

23059.23049.TNK

SHELL REMAINING LIFE CALCULATIONS

Ca = tact-tmin = Remaining Corrosion Allowance (inch)

Cr = tprev-tact / Y = Corrosion Rate (inch/Yr)

RL = Ca / Cr = Remaining Life (year)

Y = 20 = Tank age (years)

Ca = Remaining corrosion allowance of the shell course under consideration, in inch.

Cr = Corrosion rate of the shell course under consideration, in inch per year.

FHc = Calculated fill Height = (SEtact/2.6DG+1) + (product height below course of interest), in ft.

tact = Minimum thickness measurement of the shell course under consideration, as recorded at the time of inspection, in inch.

tmin = minimum required thickness of shell course, at the maximum allowable fill height, in inch.

tprev = previous thickness measurement of shell course under consideration, as recorded at last inspection or nominal thickness if no previous thickness measurements, in inch.

RL = Estimated remaining life of the shell course under consideration, in year.

Y = Time span between thickness readings or age of the tank if nominal thickness is used for tprev, in year.

tprev tact tmin Ca Cr RL FHc

Course 1 0.375 0.366 0.336 0.030 0.00045 66 53.26

Course 2 0.375 0.384 0.280 0.104 -0.00045 >40 63.83

Course 3 0.375 0.380 0.203 0.177 -0.00025 >40 76.78

Course 4 0.375 0.384 0.153 0.231 -0.00045 >40 85.40

AST ATMOSPHERIC STORAGE TANK FIXED ROOF EVALUATION

MINIMUM THICKNESS, REMAINING LIFE, PRESSURE CALCULATIONS

Date 6/8/2023

File No Report No Client Inspector Tank No Temp (deg F)

14577 Rprt

23059.23049.TNK3

VA Medical Center Jeff Walling Tank #3 150

Where;

Ca = remaining corrosion allowance of the tank component under consideration, in inch (t act - t min).

Cr = corrosion rate of the tank component under consideration, in inch per year (t prev - t act / Y).

oz = unit of measurement, (weight, in ounces, per square inch), (16 oz per pound) psi = unit of measurement, (weight, in pounds, per square inch) RL = estimated remaining life of the tank component under consideration, in year (Ca / Cr).

t act = actual thickness measurement of the tank component under consideration, as recorded at the time of inspection, in inch.

t min = minimum required thickness of tank component, at the design MAWP at the design temperature (200 degF for atm AST's), in inch (greater of psi/wt or 0.090").

t nom = design nominal thickness of tank component under consideration, in inch.

t prev = previous thickness measurement of the tank component under consideration, as recorded at last inspection or nominal thickness if no previous thickness measurements, in inch.

t yn = thickness of the tank component under consideration at the next inspection at twice the calculated corrosion rate, in inch (t act - (2*Cr*Yn).

wt = weight of plate per cubic inch.

wc = unit of measurement, (height, in inch, of water column bearing on 1 Sq.inch area), (27.7 wc per pound) Y = time span between thickness readings or age of the tank component if tnom is used for tprev, in year.

Yn = estimated time span to next inspection of the tank component under consideration, in year.

ROOF PLATES - REMAINING LIFE

Y t prev (inch) t act (inch) t min (inch) Cr (inch/yr) Ca (inch) RL

20 0.500 0.516 0.090 0 0.426 >20

ROOF MAXIMUM ALLOWABLE INTERNAL PRESSURE

Material Category wt

CS/Crom. Stl 0.3

Yn tyn (inch) psi oz. wc

5 0.516 0.146 2.339 4.044

RELIEF VALVE SETTING EVALUATION

Setting unit

0 oz. = 0 (psi)

MAX Allowed

2.339 oz.

Relief setting is satisfactory

AST STORAGE TANK EVALUATION

Nozzle/Pipe Remaining Life Calculations

Report No Client Inspector Vessel Date Rprt

23059.23049.TNK3 VA Medical Center Jeff Walling Tank #3 6/8/2023

Minimum Thickness Determinations:

a) The following pipe minimum thicknesses are based on the current in-house engineering standards, which take into consideration, pressures, structural integrity and localized corrosion allowance.

Size <2 3 4 6 8 10 12 >12 tmin 0.08 0.1 0.1 0.125 0.125 0.156 0.188 0.188

Nozzle Remaining Life Calculations:

CML Age (year) Comp.Disc. Size

(inch) tprev (inch) tact (inch) tmin (inch)

Ca (inch)

Cr (inch/yr) RL

13 20 24" MW 24.000 0.400 0.362 0.188 0.174 0.00190 91.60

14 20 3" Nozzle 3.000 0.216 0.224 0.100 0.124 0.00000 >20 15 20 2" Nozzle 2.000 0.218 0.198 0.080 0.118 0.00100 118.00 16 20 3" Nozzle 3.000 0.216 0.210 0.100 0.110 0.00030 366.70 17 20 2" Nozzle 2.000 0.218 0.188 0.080 0.108 0.00150 72.00 18 20 3" Nozzle 3.000 0.216 0.242 0.100 0.142 0.00000 >20 19 20 3" Nozzle 3.000 0.216 0.100

20 20 24" MW 24.000 0.250 0.250 0.188 0.062 0.00000 >20

21 20 6" Nozzle 6.000 0.280 0.264 0.125 0.139 0.00080 173.70 22 20 1.5" Nozzle 1.500 0.145 0.128 0.080 0.048 0.00085 56.50 23 20 2" Nozzle 2.000 0.154 0.080

APPENDIX C

Inspection Drawings

1) Shell Layout Drawings

APPENDIX D

Inspection Checklist

1) API-653 Checklist

APPENDIX E

Inspection Photographs

1) Photo Files

VA Medical Center Hampton VA Rprt 23059.23049.TNK3 INSPECTION PHOTOGRAPHS

Vessel overview

Tank Labeling

Ladder access to roof – shell with coating Failure and surface oxide

Shell with coating failure and corrosion node (typical about the tank)

MW with side product nozzles

Tank overflow piping

Tank overflow piping outlet & 3” product nozzle

6” roof vent with flame arrester

Roof vent screen intact

Roof overview with secure MW

Coating failure with surface oxidation (typical throughout roof)

Crack in concrete foundation

Containment drain

APPENDIX F

NDE Records and Certifications

1) NDE Tech Certification

2) API Inspector Certification

Be It Known That

Jason Lantsberger

HAS SUCCESSFULLY COMPLETED A 80 HOUR COURSE IN

Ultrasonic Thickness Level I & II On The 20th Day of August 2020

Shaun B. Rigsby Genesis Integrity Inspections verifies that

Jeffrey Lee Walling

HAS MET THE ESTABLISHED AND PUBLISHED REQUIREMENTS FOR API CERTIFICATION AS AN

API 653 ABOVEGROUND STORAGE TANK INSPECTOR

IN ACCORDANCE WITH THE KNOWLEDGE DEFINED IN THE API Standard 653

CERTIFICATION NUMBER 2071

ORIGINAL CERTIFICATION DATE April 30, 1996 CURRENT CERTIFICATION DATE April 30, 2023 EXPIRATION DATE April 30, 2026

D i r e c to r, I n d i v i d ua l C e r t i fi c a t i o n P r o gr a m s

APPENDIX G

1) EV Varec 220

INTRODUCTION

The VAREC 220 Series Roof Manway Covers are designed for quick, easy access to storage tanks. They are designed for working pressures up to 1 psig [6.9 kPa].

FEATURES

The cover is held closed by quick-opening cast wing nuts which facilitate rapid entry to the tank. Two configurations are provided for even load distribution of the seating surfaces.

The 18” and 20” sizes incorporate a rigid center, while the 24”, 30” and 36” sizes have a multiple number of hinged lugs and wing nuts for even load distribution.

Both configurations include an extra heavy, compliant cover insert to ensure a gas-tight seal and non-sparking operation. The large 36” size allows quick and easy tank access to personnel equipped with breather packs.

The design and construction materials provide a rugged yet lightweight cover which is easy to handle. VAREC 220 Series covers are constructed of cast iron base and cover with brass yokes and wing nuts. Also, the 18” and 20” covers have a fabricated steel center beam. 356 T6 cast aluminum and stainless steel construction is available.

All covers incorporate tallow impregnated flax cover inserts and flanged bases for mounting. The roof manway covers are available in sizes 18” through 36”.

TECHNICAL DATA

• Easy access.

• Even load distribution design.

• Gas-tight seal.

• Non-sparking.

• 18”, 20”, 24”, 30”, 36” sizes available.

• Available in Aluminum, Cast Iron and Stainless Steel construction.

C O

VER

EQ

U

IPM

EN

T

VAREC 220 Series Roof Manway Cover

Varec Biogas reserves the right to change product design and specifications without notice.

Copyright © 2007 by Varec Biogas a Division of Westech Industrial Inc. 47

The 220 Series is designed for use on tanks where quick and easy personnel access is desired.

BBaassee CCoovveerr

Cast iron Cast iron

Aluminum Aluminum

Carbon Steel Cast Iron

316 Stainless Steel 316 Stainless Steel

WWiinngg NNuuttss IInnsseerrtt

Brass Tallow Treated Flax Insert

VAREC 220 Series Roof Manway Cover

Varec Biogas reserves the right to change product design and specifications without notice.

Copyright © 2007 by Varec Biogas a Division of Westech Industrial Inc.48

Dimensions, inches & pounds [millimeters & kilograms]

18” AND 20” SIZES

Sizes 18”, 20”, 24”, 30”, 36”

Connections Base is drilled for bolting

Steel base for welding only (undrilled)

Materials of Construction

SPECIFICATIONS

Shipping weights shown for iron construction.

24”, 30” AND 36” SIZES

Section A-A øB 3/4”

[19 mm]

A A øA øC (B.C.)

D

Section A-A øB

3/4” [19 mm]

A A øA øC (B.C.)

D

SSiizzee CCooddee 1188 2200 2244 3300 3366

A Opening Size

Flange B

Diameter

C Diameter Bolt Circle

D Height

Number of Holes

Diameter of Holes

Number of Lugs

Approximate

Shipping Weight

173/4 197/8 24 301/4 3513/16

[451] [505] [610] [768] [910]

23 26 331/4 361/2 451/2

[584] [660] [845] [927] [1156]

211/4 231/4 301/4 333/4 421/4

[540] [591] [768] [857] [1073]

77/8 8 61/8 61/8 61/2

[200] [203] [156] [156] [165]

28 32 28 36 42

9/16 9/16 11/16 11/16 7/8

[14] [14] [17] [17] [22]

1 1 3 4 4

100 130 200 275 375

[45] [59] [91] [125] [170]

Dimensions are for preliminary general information and should not be used for construction purposes. Certified dimensional drawings are available upon request.

ORDERING INFORMATION

Model Description 220 Roof Manway

Code Size 18 18” 20 20” 24 24” 30 30” 36 36”

Code Material 11 Aluminum Base and Cover with Flax Insert 22 Iron Base and Cover with Flax Insert 32 Steel Base and Iron Cover with Flax Insert 66 Stainless Steel Base and Cover with Flax Insert

220 36 22 (Example) Example: 36” Roof Manway Cover, Iron Base and Cover

VA Medical Center Hampton, VA

Report No.: Rprt 23059.23049.TNK3

Inspector : Jeff Walling

Employer : Genesis Integrity Inspections

Inspection Date : 6/8/2023

IN-SERVICE

Inspection Report For

Tank #3

Diesel (#2 FO)

A Mechanical Integrity Inspection following the API-653 Standard guidelines was completed on Tank #3 at the VA Medical Center site located in Hampton, VA on 6/8/2023. The inspection was conducted in accordance with the client criterion for NDE which included Visual (VT) and Ultrasonic Thickness (UT) examinations. The tank was built to an unknown specification for AST tanks for storing Diesel FO. This inspection was conducted in accordance with the requirements of the API-653 standard. The following is a detailed report of the inspection including findings and recommendations.

Inspector Signature API Certification No. 2071 Page 1

2.0 VESSEL DATA

3.0 INSPECTION RESULTS

3.1 Foundation

3.2 Shell

3.3 Nozzles

3.4 Roof

3.5 Floor

3.6 Ancillary Equipment

3.7 Other

4.0 RECOMMENDATIONS

4.1 Foundation

4.2 Shell

4.3 Nozzles

4.4 Roof

4.5 Floor

4.6 Ancillary Equipment

4.7 Other

4.8 Next Inspections

5.0 ULTRASONIC THICKNESS (UT) MEASUREMENTS

5.1 Results Summary

5.2 Recommendations

APPENDICES APPENDIX A Thickness Measurement Record

APPENDIX B Mechanical Integrity Calculation

APPENDIX C Inspection Drawings

APPENDIX D Inspection Checklist

APPENDIX E Inspection Photographs

APPENDIX G

NDE Records and Certifications

APPENDIX F A

A Mechanical Integrity Inspection following the API-653 Standard guidelines was completed on Tank #3 at the VA Medical Center site located in Hampton, VA on 6/8/2023. This inspection was conducted to collect data in order to evaluate the mechanical integrity and fitness for continued service of the tank.

The shell has areas of coating failure and corrosion nodes about the tank.

Recommendation: Clean areas of coating failure & corrosion nodes and evaluate the extent of wall loss. If within the allowable tolerances, coat as need to restore the tank to 100% coverage. If not within tolerance (below the calculated tmin), have a tank repair company evaluate and outline a repair plan.

The tank does not have an Emergency Vent (EV). Recommendation: Install a 24" Emergency Vent (EV) or as an option, modify the existing 24" roof MW to be fitted with an EV cap (reference App. G).

A UT examination of tank secondary shell components were completed on all accessible surfaces. UT results show no significant wall loss due to general internal corrosion.

Next Inspection per API-653 Guidelines:

Next UT Inspection: 6/8/2038 Next External Inspection: 6/8/2028 Next Internal Inspection: Unknown

2.0 TANK DATA

Equip. ID: Product:

City/State: Capacity: (Gal):

Client: Specific Gravity:

State ID: Fill Height (ft):

Inspection Date: Corr. Allow.(Ca):

Type Inspection: Joint Eff.:

Test Methods: Plate Spec:

Diesel (#2 FO)

150,000

0.89

49.0

0.7

CS Unknown

Manufacturer: Roof/Head 1 t (inch): 0.500

Year Built: Bttm/Head 2 t (inch): 0.375

Const. Code: Course 1 t (inch): 0.375

Diameter/Width (ft): Course 2 t (inch): 0.375

Height (ft): Course 3 t (inch): 0.375

Length (ft): Course 4 t (inch): 0.375

Shell Const:

Roof Type:

Foundation:

Insulation Type:

Insul.Tk.(in):

Leak Detection

Tank #3

Hampton, VA

VA Medical Center

NA

6/8/2023

IN-SERVICE

Visual & UT

Unknown

Unknown (used 2003)

Unknown

50.0

32.0

Butt Welded

Fixed/Cone

Concrete Pad

NA

Passive (Concrete Pad)

3.0 INSPECTION RESULTS

The following results are the summarization of a field checklist that was utilized during the inspection of Tank #3

3.1 Foundation:

3.1.1 The foundation is constructed of a concrete pad. The foundation has a few cracks about the tank.

3.2 Shell:

3.2.1 The shell has areas of coating failure and corrosion nodes about the tank.

3.3 Nozzles:

3.3.1 The shell nozzles appear to be in satisfactory mechanical condition.

3.3.2 The tank does not have an Emergency Vent (EV).

3.3.3 The tank has a 6" normal vent with a flame arrester that appears to be in satisfactory mechanical condition.

3.4 Roof:

3.4.1 The roof has areas of coating failure and corrosion.

3.5 Floor:

3.5.1 Not inspected at this time. The chime appeared to be in satisfactory mechanical condition.

3.6 Ancillary Equipment:

3.6.1 The containment piping appeared to be in satisfactory mechanical condition.

The piping has areas of coating failure and corrosion.

3.7 Other:

3.7.1 NA

4.0 RECOMMENDATIONS

4.1 Foundation:

4.1.1 Seal coat the foundation cracks about the tank.

4.2 Shell:

4.2.1 Clean areas of coating failure & corrosion nodes and evaluate the extent of wall loss. If within the allowable tolerances, coat as need to restore the tank to 100% coverage. If not within tolerance (below the calculated tmin), have a tank repair company evaluate and outline a repair plan.

4.3 Nozzles:

4.3.1 Install a 24" Emergency Vent (EV) or as an option, modify the existing 24" roof MW to be fitted with an EV cap.

4.4 Roof:

4.4.1 Clean and coat areas of coating failure & surface oxidation to restore the roof to 100% coverage.

4.5 Floor:

4.5.1 None.

4.6 Ancillary Equipment:

4.6.1 Clean and coat areas of coating failure & surface oxidation on the containment piping to restore the roof to 100% coverage.

4.7 Other:

4.7.1 NA.

4.8 Next Inspections:

4.8.1 Next internal inspection is due by: Unknown

4.8.2 Next External inspection is due by: 06/08/2028

4.8.3 Next UT inspection is due by: 06/08/2038

4.8.4 Governing component limiting life: Shell

5.0 ULTRASONIC THICKNESS (UT) MEASUREMENTS

5.1 Results Summary:

5.1.1 A UT examination of tank components were completed on all accessible surfaces.