SMJ-FY20-FAC 10241-Tank 1-FINAL.pdf

US Army Corps of Engineers Omaha District

API 653 In-Service Inspection Report

Seymore Johnson AFB, NC Facility Number 10241 (HY 1)

US Army Corps of Engineers Center of Expertise for Petroleum, Oils and Lubricants

(USACE POL-MCX)

6 October 2020

API 653 In-Service Inspection Report Seymore Johnson AFB, NC

Table of Contents

ACRONYMS AND ABBREVIATIONS

GENERAL SUMMARY

INSPECTION DATE

STATE REGULATIONS

PREVIOUS INSPECTION DATES

RECOMMENDED FUTURE INSPECTION DATES (CALCULATIONS SHALL BE PROVIDED)

GENERAL TANK INFORMATION

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection

2. Site Information

B. TANK INSPECTION COMMENTS

1. Tank Construction

2. Tank Foundation

3. Tank Bottom

4. Tank Shell

5. Tank Appurtenances

6. Tank Coating

7. Tank Piping System

8. Fire Protection System

9. Secondary Containment

10. Cathodic Protection

C. FINDINGS AND RECOMMENDATIONS

1. MANDATORY REPAIRS per API 653, UFC 3-460-01, or AW 78-24-27 Standards

2. REQUIRED REPAIRS to Fully Comply with API 653, UFC 3-460-01, or AW 78-24-27 Standards

3. RECOMMENDED REPAIRS as Part of Regular Maintenance

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

SHELL SETTLEMENT SURVEY

SHELL LAYOUT DRAWING

ROOF LAYOUT DRAWING

NEXT INSPECTION

APPENDIX B: 3-D DOCUMENTATION AND ANALYSIS

OUT OF PLUMBNESS (VERTICALLY)

ISOLATED SHELL DISTORTION

APPENDIX D: API 653 CHECKLISTS FOR TANK INSPECTIONS

APPENDIX E: PHOTOGRAPHS

API STANDARD 653

recommends that this document containing valuable historical information be retained for the life of this tank.

ACRONYMS AND ABBREVIATIONS

API American Petroleum Institute

ASME American Society of Mechanical Engineers

ASNT American Society of Non-Destructive Testing

ATG Automatic Tank Gauge

BBL Barrel

CFR Code of Federal Regulations

CP Cathodic Protection

DFT Dry Film Thickness

HLA High Level Alarm

HLCS High Level Control Shutoff

HHLA High-High Level Alarm

LLA Low Level Alarm

LLLA Low-Low Level Alarm

MFL Magnetic Flux Leakage

MT Magnetic Particle Testing

NACE National Association of Corrosion Engineers

NDT Non-Destructive Testing

NFPA National Fire Protection Association

PSI Pounds per Square Inch

PT Penetrant Testing

P/V Pressure/Vacuum

RP Recommended Practice

PST Product Saver Tank

RT Radiography Testing

TML Thickness Measurement Location

TRV Thermal Relief Valve

UFC Unified Facilities Criteria

UFGS Unified Facilities Guide Specifications

ULS Ultra Low Sulfur

UT Ultrasonic Testing

VT Visual Testing

GENERAL SUMMARY

Tank 10241 is located at Seymore Johnson AFB, NC and is a welded, steel, vertical aboveground Jet-A storage tank. The tank was built per API 650 10th edition in 2006 and the manufacturer is Fisher Tank Co.

Tank 10241 is 43’ 6” in diameter and 42’ 3” tall with a maximum liquid level of 37’ 8” high per the certified strapping chart. The In-service inspection was performed 10 October 2020, and the results of this inspection will provide recommendations for repairs and upgrades which are required to comply with applicable industry and military standards. The testing and inspection were performed in accordance with the applicable sections of the Fifth Edition of API 653. Contained in this report is a detailed account of the tank inspection, a summary of the non-destructive testing, and the conclusions derived from the inspection and testing.

INSPECTION DATE

API In-Service (External) Inspection Date: 6 October 2020

Equipment Used:

Manufacturer: Dakota Ultrasonic’s Model Number: CMX DL Calibration Method: Zeroing Procedure, Multi-step Thickness gauge

Manufacturer: MFE Enterprises Tank Floor Scanner

Model Number: MFE 2412 Mark III Calibration Method: Calibration Plate with Known Defects

Inspectors:

John Hester API 653/NDE level II Kyle O’Dell EIT

STATE REGULATIONS

State Regulation for API In-Service Tank Inspections N/A State Regulation for API Out-of-Service Tank Inspections N/A

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

PREVIOUS INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: March 2011 API In-Service (External) Inspection Date: January 2015

RECOMMENDED FUTURE INSPECTION DATES (CALCULATIONS SHALL BE PROVIDED)

API Out-of-Service (Internal) Inspection Date: March 2021 (per previous report) API In-Service (External) Inspection Date: 6 October 2025 Ultrasonic Thickness Testing (UT) March 2026

John Hester Philip D. Rhodes, P.E.

Project Manager/Inspector Engineer Robert and Company Robert and Company API 653 No. 88616 STI/SP001 No. AST-2092 ASNT NDT Level II No. 164397

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner U.S. Air Force Location Seymore Johnson AFB Facility Number 10241 Tank Number 10241 (HY 1) State / Country North Carolina City Goldsboro Inspection Date 6 October 2020 Tank Manufacturer Fisher Tank Company Design Standard API 650 10th Edition Date of Construction 2006 Tank Contents Jet A Tank Serial Number N/A Tank Diameter 43’ 6” Shell Height 42’ 3” Product Height 36’ (per tank label) Tank Capacity 10,000 bbls Foundation Concrete ringwall

Construction

Bottom Cone down (per previous report) Shell Butt welded steel plates Floating Roof Aluminum Panel Fixed Roof Lap welded steel plates

Material

Bottom Unknown Shell Unknown Floating Roof Aluminum Fixed Roof Unknown

Cathodic Protection Impressed Current

Interior Coating System Epoxy (per previous report)

Exterior Coating System Appears to be standard epoxy-polyurethane 100% of exterior surfaces.

Level Gauging ENRAF Overfill Protection HLA, HHLA, LLA Piping Receipt 8” Carbon Steel Issue 16” Carbon Steel Low Suction 4” Carbon Steel Water Draw-Off 1” Carbon Steel

Level Alarms High Level Alarm (HLA) / Low Level Alarm(LLA) 1” Carbon Steel

Type of Internal Floating Roof Aluminum Honeycomb Panels

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection An In-Service API 653 inspection was performed 6 October 2020 on Tank 10241. Results of this inspection identified recommended repairs and upgrades required to comply with API 650/653, UFC 3-460-01, 3-460-03, AW 78-24-27 and industry standards.

2. Site Information Seymour Johnson AFB was established five months after the United States entered World War II when the War Department approved the establishment of a technical school two miles southeast of Goldsboro. Seymour Johnson Field was activated on June 12, 1942, as Headquarters, Technical School, Army Air Forces Technical Training Command. The base is named in honor of U.S. Navy Lt.

Seymour A. Johnson, a native of Goldsboro. Johnson, a test pilot, was killed in an aircraft crash near Norbeck, Md., March 5, 1941.

B. TANK INSPECTION COMMENTS

1. Tank Construction Tank 10241 is located at Seymore Johnson AFB, NC and is a welded, steel, vertical aboveground jet fuel (Jet-A) storage tank. The tank was built per API 650 in 2006 and the manufacturer is Fisher Tank Co. Tank 10241 is 43’ 6” in diameter and has a maximum liquid level of 36’ high per the tank label. There is a nameplate on the tank.

2. Tank Foundation The tank is supported on a concrete ringwall. The ringwall does have underside leak detection “telltales” in its perimeter. The tank is anchored to the ringwall. The bottom-to-ringwall seal is cracked and failing. A settlement evaluation was performed during the inspection. No signs of settlement were noted. See Appendix A for settlement results.

3. Tank Bottom The tank bottom is of cone-down construction with a 43’ 6” diameter. The tank bottom does have the standard 2” chime extension. There are notches cut at all anchor bolt locations. See picture E.11

4. Tank Shell The tank shell is equipped with (5) 8’, and (1) 2’ butt-welded steel shell courses. Shell plates were examined using VT methods. No peaking or banding was noted at this time.

5. Tank Appurtenances

a. Internal Floating Roof

Full contact with double wiper seal

b. Geodesic Dome Roof

N/A

c. Gauging The tank is provided with an ENRAF gauging system, 8” gauging hatch for manual gauging.

The tank has a Varec manual gauging system that can be read from the ground.

d. Level Alarms

The tank is provided with independent shell mounted High-Level alarm (HLA), High-High level alarm (HHLA), and an independent low level alarm (LLA).

e. Stairs and Platforms The tank is provided with a spiral staircase with an upper platform for roof access as well as high level alarm maintenance and testing.

f. Grounding and Bonding The tank is equipped with eight (8) grounding lugs attached to the tank.

6. Tank Coating The exterior coating of the shell is in satisfactory condition with minor coating failure at this time.

7. Tank Piping System All nozzles are adequately reinforced. The tank has a 1" Water Draw, 4” Product Recovery, 8" Receipt, 16" Product Issue. All piping with repads have weep holes that are in satisfactory condition.

8. Fire Protection System Fire hydrant and portable foam system.

9. Secondary Containment Tank 10241 is located within a concrete containment dike. A leak test was performed on the containment dike drainage system. The leak test revealed that the drainage system is liquid-tight with no indications of seepage. Secondary containment exceeds the requirements of UFC 3-460-01.

𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠 𝑠𝑠𝑠𝑠𝑠𝑠𝑐𝑐𝑠𝑠𝑐𝑐𝑠𝑠𝑐𝑐𝑠𝑠𝑠𝑠𝑐𝑐 = 102′ ∙ 104′ ∙ 7′ = 74,256 𝑓𝑓𝑐𝑐3 = 13,226 𝑏𝑏𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑠𝑏𝑏𝑠𝑠 1 𝑓𝑓𝑠𝑠𝑠𝑠𝑐𝑐 𝑠𝑠𝑠𝑠𝑠𝑠𝑢𝑢𝑠𝑠𝑐𝑐𝑐𝑐𝑠𝑠𝑠𝑠 𝑠𝑠𝑓𝑓 𝑤𝑤𝑠𝑠𝑏𝑏𝑏𝑏 = 102′ ∙ 104′ ∙ 6′ = 63,648 𝑓𝑓𝑐𝑐3 = 11,336 𝑏𝑏𝑠𝑠𝑠𝑠𝑠𝑠𝑏𝑏𝑠𝑠𝑠𝑠

There is sufficient containment.

10. Cathodic Protection The tank has an impressed current cathodic protection system installed.

C. FINDINGS AND RECOMMENDATIONS

1. MANDATORY REPAIRS per API 653, UFC 3-460-01, or AW 78-24-27 Standards Mandatory repairs represent items that require immediate attention, in order to prevent imminent risk to system operators, equipment integrity, or the adjacent environment. The tank should remain out of service until these repairs are completed.

No mandatory repairs are required for continued service.

2. REQUIRED REPAIRS to Fully Comply with API 653, UFC 3-460-01, or AW 78-24-27 Standards Recommended repairs represent items that should be addressed in a timely manner in order to prevent future potential risks to system operators, equipment integrity, or the adjacent environment. These items may be required by Federal, State and Local Codes or by Military Criteria.

a. Title: Wiper Seal

OBSERVATION: APPARENT WIPER SEAL FAILURE

REFERENCE: UFC 3-460-03

RECOMMENDATION: INSTALL NEW WIPER SEAL.

b. Title: Manual gauge

OBSERVATION: TEST FUNCTION OF MANUAL GAUGE DOES NOT WORK

REFERENCE: UFC 3-460-01

RECOMMENDATION: REPAIR GAUGE TO FUNCTION PROPERLY

c. Title: Sight glasses on thermal relief lines

OBSERVATION: LINES HAVE SIGHT GLASSES

RECOMMENDATION: REMOVE SIGHT GLASSES AND REPLACE WITH STRAIGHT PIPE

d. Title: Labeling

OBSERVATION: TANK DOES NOT HAVE ALL REQUIRED LABELING

RECOMMENDATION: INSTALL LABELING PER DOT STANDARDS

e. Title: 1st step to stairs on tank

OBSERVATION: BOTTOM STEP IS CREATE HAZARD DUE TO HEIGHT

REFERENCE: OSHA

RECOMMENDATION: ADD CONCRETE PLATFORM AT BOTTOM

3. RECOMMENDED REPAIRS as Part of Regular Maintenance Recommended repairs represent items that should be addressed in a timely manner in order to prevent future potential risks to system operators, equipment integrity, or the adjacent environment.

a. Title: Coating

OBSERVATION: MINOR COATING FAILURE ON LEVEL GAUGES

RECOMMENDATION: REPAIR APPROXIMATELY 6 SQUARE FEET OF COATING FAILURES

b. Title: Biological grown on roof

OBSERVATION: MOLD GROWTH ON ROOF

RECOMMENDATION: REMOVE GROWTH

c. Title: Vent Screen

OBSERVATION: VENT SCREEN SHOULD BE REPLACED

REFERENCE: AW 78-24-27 D.09

RECOMMENDATION: REMOVE SCREEN AND REPLACE WITH CORROSION RESISTANT, ¾” FLATTENED

EXPANDED METAL THAT IS TACK WELDED 360° AROUND OPENING

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

SHELL SETTLEMENT SURVEY

SHELL LAYOUT DRAWING

ROOF LAYOUT DRAWING

NEXT INSPECTION

APPENDIX B: 3-D DOCUMENTATION AND ANALYSIS

OUT OF PLUMBNESS (VERTICALLY)

The tank was checked by using laser measurements taken from fixed locations at 8 points around tank from chime weld to the roof weld. The Tank’s plumbness is in satisfactory condition at this time.

ISOLATED SHELL DISTORTION

There was no significant shell distortion noted at this time.

APPENDIX D: API 653 CHECKLISTS FOR TANK INSPECTIONS

Tank In-Service Inspection Checklist

Item Completed

X C.1.1 Foundation

Measure foundation levelness and bottom elevations (see Annex B for extent of measurements). X

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 b Inspect drain openings in ring, back of water draw basins and top surface of ring for indications of bottom leakage. X c Inspect for cavities under foundation and vegetation against bottom of tank. X d Check that runoff rainwater from the shell drains away from tank. X e Check for settlement around perimeter of tank. X

C.1.1.2 Asphalt a Check for settling of tank into asphalt base which would direct runoff rain water under the tank instead of away from it. N/A b Look for areas where leaching of oil has left rock filler exposed, which indicates hydrocarbon leakage.

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

C.1.1.4 Rock a Presence of crushed rock under the steel bottom usually results in severe underside corrosion. Make a note to do additional bottom plate examination (ultrasonic, hammer testing, or turning of coupons) when the tank is out of service.

N/A

C.1.1.5 Site Drainage a Check site for drainage away from the tank and associated piping and manifolds. X b Check operating condition of the dike drains. X

C.1.1.6 Housekeeping Inspect the area for buildup of trash, vegetation, and other inflammables buildup. X

C.1.1.7 Cathodic Protection Review cathodic protection potential readings. X

C.1.2 Shells C.1.2.1 External Visual Inspection a Visually inspect for paint failures, pitting, and corrosion. X b Clean off the bottom angle area and inspect for corrosion and thinning on plate and weld. X c Inspect the bottom-to-foundation seal, if any. X

C.1.2.2 Internal (Floating Roof Tank) Visually inspect for grooving, corrosion, pitting, and coating failures. X

C.1.2.3 Riveted Shell Inspection a Inspect external surface for rivet and seam leaks. N/A b Locate leaks by sketch or photo (location will be lost when shell is abrasive cleaned for painting). N/A c Inspect rivets for corrosion loss and wear. N/A

Tank In-Service Inspection Checklist Continued

Item Completed

X 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

C.1.2.4 Wind Girder (Floating Roof Tanks) 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. N/A b Check support welds to shell for pitting, especially on shell plates. N/A c Note whether supports have reinforcing pads welded to shell. N/A

C.1.3 Shell Appurtenances C.1.3.1 Manways and Nozzles a Inspect for cracks or signs of leakage on weld joint at nozzles, manways, and reinforcing plates. X b Inspect for shell plate dimpling around nozzles, caused by excessive pipe deflection. X c Inspect for flange leaks and leaks around bolting. X d Inspect sealing of insulation around manways and nozzles. X e Check for inadequate manway flange and cover thickness on mixer manways. N/A

C.1.3.2 Tank Piping Manifolds a Inspect manifold piping, flanges, and valves for leaks. X b Inspect fire fighting system components. X c Check for anchored piping which would be hazardous to the tank shell or bottom connections during earth movement. X d Check for adequate thermal pressure relief of piping to the tank. X 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. X h Check welds on shell-mounted davit clips above valves 6 in. and larger. X

C.1.3.3 Autogauge System a Inspect autogauge tape guide and lower sheave housing (floating swings) for leaks. X b Inspect autogauge head for damage. X c Bump the checker on autogauge head for proper movement of tape. X d Identify size and construction material of autogauge tape guide (floating roof tanks). X e Ask operator if tape tends to hang up during tank roof movement (floating roof tanks). X f Compare actual product level to the reading on the autogauge (maximum variation is 2 in.). X g On floating roof tanks, when the roof is in the lowest position, check that no more than two ft of tape are exposed at the end of the tape guide. X h Inspect condition of board and legibility of board-type autogauges. X i Test freedom of movement of marker and float. X

C.1.3.4 Shell-Mounted Sample Station a Inspect sample lines for function of valves and plugging of lines, including drain or return-to-tank line. N/A b Check circulation pump for leaks and operating problems. N/A

Completed

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

C.1.3.5 Heater (Shell Manway Mounted)

Inspect condensate drain for presence of oil indicating leakage. N/A C.1.3.6 Mixer a Inspect for proper mounting flange and support. N/A b Inspect for leakage. N/A c Inspect condition of power lines and connections to mixer. N/A

C.1.3.7 Swing Lines: Winch Operation a Nonfloating. Raise, then lower the swing line with the winch, and check for cable tightness to confirm that swing line lowered properly. N/A b Floating. With tank half full or more, lower the swing line, then let out cable and check if swing has pulled cable tight, indicating that the winch is operating properly. N/A 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.

N/A

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

C.1.4 Roofs

C.1.4.1 Deck Plate Internal Corrosion a For safety, before accessing the roof, check with ultrasonic instrument or lightly use a ball peen hammer to test the deck plate near the edge of the roof for thinning. (Corrosion normally attacks the deck plate at the edge of a fixed roof and at the rafters in the center of the roof first.)

X

C.1.4.2 Deck Plate External Corrosion a Visually inspect for paint failure, holes, pitting, and corrosion product on the roof deck. X C.1.4.3 Roof Deck Drainage a Look for indication of standing water. (Significant sagging of fixed roof deck indicates potential rafter failure. Large standing water areas on a floating roof indicate inadequate drainage design or, if to one side, a nonlevel roof with possible leaking pontoons.)

X

Completed

X C.1.4.4 Level of Floating Roof a

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

N/A

C.1.4.5 Gas Test Internal Floating Roof a Test for explosive gas on top of the internal floating roof. Readings could indicate a leaking roof, leaking seal system, or inadequate ventilation of the area above the internal floating roof. N/A

C.1.4.6 Roof Insulation a Visually inspect for cracks or leaks in the insulation weather coat where runoff rain water 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 Systems a

Inspect the condition of the seal, measure and record maximum rim spaces and seal to- shell gaps around the full roof circumference at the level of inspection.

NOTE Inspection of the seal and measurement of the rim spaces and seal-to-shell gaps at more than one level may be necessary to more fully determine if any problems exist at other levels of tank operation).

X b Measure and record annular space at 30-ft spacing (minimum of four quadrants) around roof and record. Measurements should be taken in directly opposite pairs. N/A

1) _______ _______ Opposite pair 1. N/A

2) _______ _______ Opposite pair 2. N/A 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 b On tanks governed by Air Quality Monitoring District rules, check for the condition of seal inside hatch cover. X c Check for corrosion and plugging on thief and gauge hatch cover. X d Where sample hatch is used to reel gauge stock level, check for marker and tab stating hold-off distance. X e Check for reinforcing pad where sample hatch pipe penetrates the roof deck. X

Completed

X 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 of the gauge well for thinning, size of slots, and cover condition. X b Check for a hold-off distance marker and tab with hold-off distance (legible). X c On floating roofs, 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. N/A e If tank has a gauge well washer, check valve for leakage and for 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 C.1.5.4 Autogauge: Inspection Hatch and Guides (Fixed Roof) a Check the hatch for corrosion and missing bolts. X b Look for corrosion on the tape guide’s and float guide’s wire anchors. X

C.1.5.5 Autogauge: Float Well Cover a Inspect for corrosion. N/A b Check tape cable for wear or fraying caused by rubbing on the cover. N/A

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

C.1.5.10 Removable Roof Leg Racks

Check for leg racks on roof. N/A C.1.5.11 Vacuum Breakers a Report size, number, and type of vacuum breakers. Inspect vacuum breakers. If high legs are set, check for setting of mechanical breaker in high leg position. X

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

Completed

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

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 coves, check for vent tubes. Check that vent tubes are not plugged up. Inspect lock-down devices for condition and operation. N/A

C.1.6.1 Access ways

See Tank Out-of-service Inspection Checklist, Item C.2.12. N/A

NOTES:

APPENDIX E: PHOTOGRAPHS

E.1: North View E.2: East View

E.3: South View E.4: West View

E.5: Nameplate E.6: Receipt line

E.7: 2” Thermal relief E.8: Thermal relief return

E.9: Water Draw E.10: Issue line

E.11: Pump-out E.12: Reference manway

E.13: Low Level E.14: Ground

E.15: ENRAF E.16: Center Vent

E.17: Vent Screen E.18: High Level

E.19: Top Overview E.20: Typical Tiedown

E.21: Tell Tale E.22: 1st Step

E.23: Containment Drain E.24: Drain Valve

E.25: Sticking Port E.26: Product Recovery

E.27: Safe Fill E.28: Secondary Manway

E.29: Vent Screen E.30: Overall containment

E.31: Cathodic Protection E.32: Cathodic Protection