Stewart (Newburgh)-Fac 7401 (Tank 1)-FINAL-2017.pdf

US Army Corps of Engineers Omaha District

API 653 In-Service Inspection Report

Stewart ANG (Newburgh), New York Tank Facility 7401

Tank 39-400 (Tank 1)

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

USACE POL-MCX

1 September 2017

API 653 In-Service Inspection Report Stewart ANG, New York

Table of Contents

ACRONYMS AND ABBREVIATIONS

GENERAL SUMMARY

THIS INSPECTION

PREVIOUS INSPECTION DATES

RECOMMENDED FUTURE INSPECTION DATES

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 Shell

4. Tank Appurtenances

5. Tank Coating

6. Tank Piping System

7. Fire Protection System

8. Secondary Containment

C. FINDINGS AND RECOMMENDATIONS

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

2. Significant Findings per API 653, UFC 3-460-01, or AW 78-24-27 Standards

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

4. Recommended Repairs as Part of Regular Maintenance

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

SHELL ROUNDNESS SURVEY & SETTLEMENT

SHELL SETTLEMENT SURVEY

SHELL THICKNESS CALCULATIONS

SHELL/ROOF ULTRASONIC THICKNESS MEASUREMENTS

TANK DRAWINGS

OSHA ACCESS STRUCTURE REPORT

APPENDIX B: API 653 CHECKLISTS FOR TANK INSPECTIONS

APPENDIX C: PHOTOGRAPHS

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

FAC Facility

HLA High Level Alarm

HLCV High Level Control Valve

HHLA High-High Level Alarm

LLA Low Level Alarm

LLLA Low-Low Level Alarm

MFL Magnetic Flux Leakage

MFE Magnetic Flux Exclusion

MT Magnetic Particle Testing

NA Not Applicable

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

UT Ultrasonic Testing

VT Visual Testing

GENERAL SUMMARY

Austin Brockenbrough & Associates, LLP (Brockenbrough) was retained by Omaha District USACE under Contract No. W9128F-12-D-0006 Delivery Order No. 0025 to perform API Standard 653 In-Service Inspections. As required by this task, Brockenbrough executed a tank inspection site visit to Stewart Air National Guard, located in Newburgh, New York. An API 653 In-Service (visual external) Inspection was conducted for Tank Facility No. 7401 (Tank 39-400/Tank 1) on April 20, 2017. This inspection was performed in accordance with API Standard 653, “Tank Inspection, Repair, Alteration, and Reconstruction,” and the referenced contract. This inspection included a visual examination of the tank exterior, checklist review of all tank components, foundation settlement survey and a roundness survey of the tank shell.

Tank Facility 7401 is a 63-foot diameter by 50-foot and 3-inches tall, single wall, vertical, field erected tank with a nominal storage capacity of 25,000 barrels of jet fuel (F-24). Since, the tank did not have a manufacturer’s data plate attached to the tank shell, the tank manufacturer is unknown. Based on POL design drawings received from the base, the tank appears to be constructed in 1986. Per the tank repair data plate, it is known that a new tank bottom and a 36-inch shell manway were installed in 2010. Secondary containment is provided by a concrete containment area with vertical concrete dike walls. The concrete containment area and dike walls are lined with exposed flexible membrane liner (FML). Also, the tank is equipped with a typical under tank impressed current cathodic protection system. Details of the tank construction and appurtenances are included in Section ‘B’.

There are no mandatory repairs noted that need immediate attention. Additional noted deficiencies are discussed in more detail in Section ‘C’, and should be addressed in a timely manner. Photographs of the tank are included in Appendix ‘C’.

A previous out-of-service inspection for this tank is unable for review. Based on the date of tank cleaning and major repairs/alterations, it can be assumed that an out-of-service inspection was performed in September 2010.

While the current version of UFC 3-460-03 requires the next out-of-service inspection occur after 10 years, an upcoming revision allows the frequency to be extended as determined by a certified API 653 tank inspector.

However, as a new bottom was installed in 2010, a ten-year interval for the next internal inspection is recommended to provide a baseline for the corrosion rate of the new tank bottom. This inspection should include an external and internal inspection and include an examination of the tank bottom by magnetic flux leakage (MFL or MFE) technology and an ultrasonic thickness inspection of the tank shell. The next API Standard 653 In-Service (visual external) Inspection should be performed by an API 653 Inspector five years after the next internal inspection, in April 2025. The next ultrasonic thickness inspection of the shell would be due by April 2022, but should be performed in conjunction with the Out-of-Service Inspection.

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner New York Air National Guard

Location Stewart Air National Guard

Facility Number Facility 7401

Tank Number Tank 39-400 (Tank 1)

State / Country New York / U.S.A.

City Newburgh

Inspection Date April 20, 2017

Tank Manufacturer Unknown

Design Standard API Std 650 (Per tank repair data plate)

Date of Construction 1986 (Per POL design drawings)

Tank Contents Jet Fuel (F-24)

Tank Serial Number Unknown

Tank Diameter 63’-0” (Per previous tank inspection report)

Shell Height 50’-3” (Per previous tank inspection report)

Product Height 21’ – 4 1/2” (Tape Level Gauge reading at the time of inspection)

Tank Capacity 25,000 barrels (Nominal capacity)

Foundation Concrete Ringwall

Construction

Bottom Unknown

Shell (6) butt-welded shell courses

Floating Roof Aluminum Floating Pan

Fixed Roof Self-supported, lap-welded, cone-up

Material

Bottom Carbon Steel (assumed)

Shell Carbon steel

Floating Roof Aluminum

Fixed Roof Carbon steel

Cathodic Protection Impressed Current Cathodic Protection System

Interior Coating System Epoxy-Epoxy-Epoxy (assumed)

Exterior Coating System Epoxy-Epoxy-Polyurethane (assumed)

Level Gauging Varec Tape Level Gauge; Cameron Automatic Tank Gauge (ATG)

Overfill Protection High Level Control Valve; Independent High-high and High Level Alarms

Piping Receipt 8” Stainless Steel

Issue 12” Stainless Steel

Low Suction 2” Stainless Steel

AFFF 4” Carbon Steel

Water Draw-Off 1” Stainless Steel

Level Alarms Independent High-high, High, and Low Level Alarms

Type of Internal Floating Roof Aluminum Honeycomb Floating Pan

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection

This project will perform API 653 Inspections of various tanks at facilities throughout the United States.

Additional consideration is given to federal, state, and local regulations as well as applicable military criteria and general industry standards.

For Facility 7401, an API Standard 653 In‐service (visual external) Inspection was performed. This inspection also included an ultrasonic inspection of the shell and roof plates, a foundation settlement survey, and a shell roundness assessment.

2. Site Information

On April 20, 2017 Brockenbrough performed an API 653 In‐Service (visual external) Inspection of Tank

Facility 7401 located at Stewart Air National Guard. Stewart Air National Guard is located in the Town of Newburgh, New York. Stewart Air National Guard Base is the home of the 105th Airlift Wing (105

AW), an Air Mobility Command (AMC)-gained unit of the New York Air National Guard and "host" wing for the installation.

3. Future Projects

There is a project in place to repair the deteriorated joints on the angle iron extensions on top of the dike walls as is questionable as to whether they would contain the fuel for the tanks in case of a tank failure. This project has been submitted under Work Order No. 201701041, dated 18 April 2017.

B. TANK INSPECTION COMMENTS

1. Tank Construction

Tank Facility 7401 is a nominal 25,000 barrel, 63-foot diameter by 50-foot and 3-inches tall, F-24, aboveground vertical storage tank. Per the POL design drawings, the tank appears to be constructed to

API 650 design standard in 1986.

2. Tank Foundation

The tank rests on an 18-inch high concrete ringwall foundation. The foundation was visually evaluated during the inspection for broken concrete, spalling, cracks, and vegetation against the bottom of the tank. The concrete ringwall was found to be in good condition with only a few minor hairline cracks.

The bottom-to-foundation seal appears to be in good condition. A shell settlement survey was performed during the inspection in accordance with Appendix B of API Standard 653 and was found to be acceptable. Settlement results are listed in Appendix A.

3. Tank Shell

The vertical and cylindrical shell consists of six butt‐welded courses. The exterior of the shell was visually inspected and evaluated for plumbness, roundness, peaking and banding. The coating was also evaluated for deterioration.

a. Shell Plumbness, Roundness, Peaking, and Banding

The exterior of the shell was visually inspected and evaluated for plumbness, roundness, peaking and banding.

1) API 650, section 7.5.2 allows a maximum out of plumb of the top of the shell relative to the tank bottom of 1/200 the height of the shell, a difference of 3 inches for this 50-foot and 3-inches tall tank. The maximum measured out-of-plumbness was 1-9/16 inches measured towards the center of the tank measured on the east. The out-of-plumbness of the shell is within the tolerance that is allowed by API 650.

2) The shape of the shell appears to exceed the allowable API Standard 650 tolerance of plus or minus 1-inch of shell radius, as measured using laser surveying methods. Based on the circumference of the shell measured near the bottom, the radius of the shell should be 31 feet and 6 inches. However, the measured radius of the shell varies at the bottom from 31 feet and

5-1/16 inches in the southeast to 31 feet and 6-1/4 inches in the west. Also, the measured radii of the shell, varies near the top from 31 feet and 4-3/16 inches in the northeast and to 15 feet and 6-13/16 inches in west. The top of the shell is only slightly out of tolerance for a new tank.

Since the shell did not appear to be significantly distorted and the out-of-roundness does not appear to be detrimental to the structural integrity of the tank, no action is required or recommended at this time.

3) Minor shell deformations were noted on the fifth shell course. While some minor peaking and banding of the butt-welded shell seams was observed, the shape of the shell plates appears to be within the limits allowed by API 650.

b. Shell Coatings

Minor coating failure and corrosion were observed on a few areas of the tank shell, anchor bolts and nuts, intermediate platform frame, etc. However, the exterior shell coating shows no signs of significant deterioration. As the tank is used to store oil and the interior is coated with epoxy, deterioration of the interior of the shell since the previous inspection was performed is extremely unlikely.

c. Shell Ultrasonic Thickness Measurements

The ultrasonic thickness measurements of the shell indicate the shell has more than 30 years of remaining life. API 653 recommends ultrasonic thickness measurements of the shell be taken at least every 15 years.

4. Tank Appurtenances

a. Tank Roof

The tank is constructed with a self-supported lap-welded fixed cone roof. Isolated areas of coating failure and corrosion were observed on the roof flanges and nozzles. However, the coating system on the tank roof appeared to be in overall good condition.

b. Venting

This tank features a 24-inch center vent and four roof-mounted hatches/circulation vents. These hatches/vents provide adequate venting capacity based on the size of the tank. This tank is also equipped with two overflow vents.

c. Gauging

The tank’s Cameron ATG is installed through an 8-inch nozzle mounted on the tank roof. The tank also has a Varec tape level gauge mounted on the side of the tank. This tank is also equipped with an 8-inch dedicated sample hatch/gauging well.

d. Level Alarms

The low and high level alarm chambers are mounted on the exterior of the tank shell. The tank is equipped with low, high, and high-high level alarms independent of the tank gauging system.

However, the low level alarm set point appears to be too low to prevent damage to the floating pan legs.

e. Stairs and Platforms

The tank’s steel roof is accessible by a circumferential stairway mounted on the shell of the tank.

The coating system on the circumferential stairway appeared to be good condition. The width and rise of the stairway steps appear to be in general compliance with OSHA criteria. The height of handrails appears to exceed the maximum limit set by OSHA. However, the difference is small and does not appear to be detrimental to normal base operations.

f. Grounding and Bonding

There are two grounding cables connected to ground lugs welded to the tank shell.

5. Tank Coating

The interior coating system of the tank is assumed to be epoxy-epoxy-epoxy. The external coating system appears to be a standard military coating system (epoxy-epoxy-polyurethane). Minor coating failure and corrosion were observed on few areas of the tank shell, anchor bolts and nuts, intermediate platform frame, handrails, roof nozzle and flanges, etc.

6. Tank Piping System

Fuel is received through 8‐inch stainless steel piping from an adjacent Truck Off-load Station and is issued through 12-inch stainless steel piping from the adjacent Pumphouse to the Truck Fillstands and

Hydrant System. Corrosion was observed on carbon steel pipe supports that are used for the tank issue and receipt piping.

7. Fire Protection System

There are several fire hydrants noted within 300 feet of this tank. There is also an Aqueous Film

Forming Foam (AFFF) system installed.

8. Secondary Containment

Secondary containment is provided by a concrete containment area with vertical concrete dike walls lined with flexible membrane liner. Also, there is a 3-inch by 3-inch angle iron extension installed on top of the dike walls along the perimeter of the containment area. The secondary containment was visually evaluated during the inspection. The containment is of sufficient size to contain a total tank loss plus one foot of freeboard.

C. FINDINGS AND RECOMMENDATIONS

Tank Facility 7401 was found to be in generally good condition. The tank is fully serviceable. However, several items were observed that are not in full compliance with federal, state, and local codes or military criteria.

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 to be performed.

2. SIGNIFICANT FINDINGS per API 653, UFC 3-460-01, or AW 78-24-27 Standards

The following information identifies the significant findings found during the tank inspection.

a. Repair Hairline Cracks in Ringwall Foundation

OBSERVATION: Minor hairline cracking was present on a few areas within the concrete ringwall foundation.

CODE REFERENCE: UFC 3-460-03, Section 8-4.3.1 and 8-10.2.1 require all cracks to be cleaned and sealed with a fuel resistant sealant.

RECOMMENDATION: Clean and seal all the hairline cracks within the concrete ringwall foundation with a fuel resistant sealant.

b. Repair Coating System on Tank and Tank Appurtenances

OBSERVATION: Localized coating failure and minor surface corrosion were observed on a few areas of the tank shell, anchor bolts and nuts, handrails, intermediate platform frame, pipe supports, etc. Also, several areas of coating failure and corrosion were observed on the bottom platform frame and access stairway. Some areas of the roof nozzle flanges, nozzle piping, etc. were found to be corroding.

CODE REFERENCE: UFC 3-460-03, Section 8-3.10, requires the exterior of fuel storage tanks and appurtenances to be coated.

RECOMMENDATION: Remove corrosion from all the isolated areas of deterioration. Clean and prep all the areas that require coating repairs and apply a compatible coating system that meets military criteria.

c. Provide Manufacturer’s Nameplate

OBSERVATION: The tank does not have a manufacturer’s nameplate installed on the tank shell.

CODE REFERENCE: UFC 3-460-01 paragraph 8-3.15 requires nameplates for all aboveground storage tanks in accordance with API Standard 650 Section 10.1 Nameplates.

RECOMMENDATION: Provide a manufacturer’s nameplate per the latest edition of DOD Standard

Design AW 78-24-27.

d. Repair Low Level Alarm

OBSERVATION: The tank is not equipped with a low-low level alarm. Also, the low level set point appears to be too low to prevent damage to the floating pan legs.

CODE REFERENCE: UFC 3-460-01, Table 8-1, Item l requires independent high-high, high, low, and low-low level alarms.

RECOMMENDATION: Demolish the existing low level alarm chamber and piping. Provide a new low and low-low level alarm per the DoD Standard Design AW 78-24-27 suitable for existing floating pan configuration.

e. Replace the Roof Inspection Hatches/Circulation Vents

OBSERVATION: The roof inspection hatches/circulation vent openings have been welded shut and therefore, cannot be opened for inspection and maintenance.

CODE REFERENCE: UFC 3-460-01, Table 8-1 Item h and AW 78-24-27 require that the tank roof be provided with four roof inspection hatches/ circulation vents. API 653 External Inspection

Checklist Item C.1.5.7 requires inspection of these roof-mounted vents.

RECOMMENDATION: Demolish the existing roof inspection hatches/circulation vents and replace them in accordance with DoD Standard Design AW 78-24-27.

f. Replace Coating System on AFFF Piping and Equipment

OBSERVATION: The coating system on the AFFF piping and equipment has failed.

CODE REFERENCE: UFC 3-460-01 paragraph 8-3.10 requires the exterior of fuel storage tanks and appurtenances to be coated.

RECOMMENDATION: Replace the entire coating system on the AFFF piping and equipment.

g. Repair Joints on the Angle Iron Extensions

OBSERVATION: Many of the joints on the angle iron extensions on top of the dike walls are deteriorated and would not contain the fuel for the tank in case of a spill.

CODE REFERENCE: N/A

RECOMMENDATION: There is a project in place at the base to perform this repair. However, if the work does not get completed, repair all the joints and joint seals on the angle iron extensions on top of dike walls.

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

These items represent repairs and/or upgrades that could be performed to bring the tank into full compliance with current standards, but that do not represent potential risks to system operators, equipment integrity, or the adjacent environment. Our recommendations to perform or not to perform these repairs and/or upgrades take into consideration the cost of the repair, the operational benefit of the repairs, the age of the tank/system, operator safety, environmental risks, and equipment integrity.

a. Upgrade Thermal Relief System

OBSERVATION: The existing thermal relief valve piping on the tank receipt and issue piping have some threaded piping, include sight flow indicators, and do not have testing tees. Some of the thermal relief valves are installed in horizontal position, which is generally not recommended by the valve manufacturer. Also, the thermal relief discharge piping is connected directly to the tank shell instead of the tank nozzle.

CODE REFERENCE: AW 78-24-27 requires the thermal relief piping to be equipped with isolation valves and testing tees. UFC 3-460-01, Section 9-3.5.1 does not allow sight flow indicators in thermal relief piping. UFC 3-460-01, Section 9-8 requires welded or flanged connections for joining steel pipes.

RECOMMENDATION: Replace all threaded piping and fittings in the thermal relief system with welded connections. Provide testing tees and remove sight flow indicators associated with the thermal relief system. Remove all the thermal relief valves installed in horizontal position and reinstall them per manufacturer’s recommendations. Reroute the thermal relief piping to be discharged to the tank nozzle.

b. Upgrade Water Draw-off Piping

OBSERVATION: The water draw-off piping consists of 1-inch pipe with a ball valve at the tank skin.

Also, the piping in the water draw-off system, including the tank nozzle, consists of threaded valves and fittings.

CODE REFERENCE: UFC 3-460-01, Section 9-8 requires welded or flanged connections for joining steel pipes. UFC 3-460-01, Table 8-1 z, requires water draw-off piping to include a 2-inch double block and bleed valve as the tank skin valve.

RECOMMENDATION: Since there is a FY18 MILCON project in place to relocate the facility, along with the storage tanks, we do not recommend any modifications at this time. However, if this project does not move forward, when the tank is taken out-of-service for other major repairs/upgrades, upgrade the water draw-off piping to 2-inch and provide a 2-inch double block and bleed valve at the skin of the tank. Also, replace all threaded fittings and connections with welded or flanged connections.

c. Provide Scaffold Supports

OBSERVATION: There are no scaffold cable supports present on the tank roof.

CODE REFERENCE: UFC 3-460-01, Table 8-1, Item ff requires two scaffold cable supports on the fixed roof in accordance with API 650.

RECOMMENDATION: Provide two scaffold cable supports in accordance with API 650.

d. Provide DBB for Low Suction

OBSERVATION: The tank skin valve for low suction piping is a ball valve.

CODE REFERENCE: UFC 3-460-01 requires all tank skin valves to be double block and bleed type valves.

RECOMMENDATION: Replace the ball valve in low suction piping with a double block and bleed valve at the tank shell.

4. 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. No recommended repairs are required to be performed at this time.

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

SHELL ROUNDNESS SURVEY & SETTLEMENT

The shape of the shell appears to exceed the allowable API Standard 650 tolerance of plus or minus 1-inch of shell radius, as measured using laser surveying methods. Based on the circumference of the shell measured near the bottom, the radius of the shell should be 31 feet and 6 inches. However, the measured radius of the shell varies at the bottom from 31 feet and 5-1/16 inches in the southeast to 31 feet and 6-1/4 inches in the west. Also, the measured radii of the shell, varies near the top from 31 feet and 4-3/16 inches in the northeast and to 15 feet and

6-13/16 inches in west. The top of the shell is only slightly out of tolerance for a new tank. Since the shell did not appear to be significantly distorted and the out-of-roundness does not appear to be detrimental to the structural integrity of the tank, no action is required or recommended at this time.

Austin Brockenbrough & Associates, L.L.P. 16-090.02

Location: Tank Facility 7401 Stewart Air National Guard Date: 6/7/17

Subject: Shell Radius Survey

Measured Circumference at Bottom = 197.92

Calculated Diameter = 63.00

Calculated Radius = 31.50

South 31.51 0.01 0.16 48.1 S+N 0.32

31.56 0.06 0.68 45.1 0.92

31.56 0.06 0.70 42.1 0.90

31.57 0.07 0.78 39.1 0.41

31.56 0.06 0.70 36.1 0.11

31.55 0.05 0.58 33.1 1.43

31.56 0.06 0.73 30.1 0.36

31.57 0.07 0.80 27.1 0.04

31.58 0.08 0.98 24.1 0.56

31.55 0.05 0.56 21.1 0.49

31.52 0.02 0.18 18.1 0.18

31.47 -0.03 -0.37 15.1 0.12

31.47 -0.03 -0.38 12.1 0.16

31.46 -0.04 -0.43 9.1 0.32

31.48 -0.02 -0.19 6.1 0.22

31.53 0.03 0.37 3.1 0.44

31.51 0.01 0.08 0.1 0.38

107.96

Southeast 31.44 -0.06 -0.74 48.3 SE+NW 1.79

31.46 -0.04 -0.46 45.2 1.46

31.46 -0.04 -0.49 42.2 1.85

31.45 -0.05 -0.58 39.2 2.11

31.41 -0.09 -1.06 36.3 1.57

31.38 -0.12 -1.49 33.3 1.17

31.40 -0.10 -1.16 30.3 0.39

31.40 -0.10 -1.23 27.3 0.27

31.47 -0.03 -0.32 24.2 0.87

31.50 0.00 -0.04 21.2 0.99

31.52 0.02 0.29 18.2 1.18

31.54 0.04 0.50 15.2 1.63

31.54 0.04 0.44 12.2 1.12

31.52 0.02 0.24 9.2 0.39

31.51 0.01 0.16 6.2 0.14

31.51 0.01 0.11 3.2 0.17

31.42 -0.08 -1.00 0.2 1.00

Weld Elevation 108.04

Diameter Deviation

(in)

Weld Elevation

Distance from

Centerline

Height

Above

Chime

Deviation

Radial

Deviation

(in)

East 31.34 -0.16 -1.92 48.3 E+W 1.14

31.38 -0.12 -1.44 45.3 0.16

31.36 -0.14 -1.69 42.3 0.48

31.34 -0.16 -1.91 39.3 0.58

31.35 -0.15 -1.85 36.3 0.06

31.35 -0.15 -1.75 33.3 0.16

31.38 -0.12 -1.48 30.3 0.18

31.40 -0.10 -1.21 27.3 0.19

31.41 -0.09 -1.07 24.2 0.16

31.44 -0.06 -0.77 21.2 0.14

31.46 -0.04 -0.47 18.2 0.30

31.49 -0.01 -0.08 15.2 0.40

31.48 -0.02 -0.30 12.2 0.29

31.44 -0.06 -0.67 9.2 0.00

31.46 -0.04 -0.54 6.2 0.02

31.49 -0.01 -0.16 3.2 0.52

31.47 -0.03 -0.35 0.2 0.08

Weld Elevation 108.03

Northeast 31.35 -0.15 -1.86 48.4 NE+SW 1.27

31.41 -0.09 -1.03 45.3 0.05

31.40 -0.10 -1.16 42.3 0.26

31.41 -0.09 -1.07 39.3 0.02

31.41 -0.09 -1.03 36.3 0.35

31.38 -0.12 -1.44 33.3 0.10

31.39 -0.11 -1.28 30.3 0.42

31.42 -0.08 -0.95 27.3 0.58

31.43 -0.07 -0.85 24.2 0.23

31.45 -0.05 -0.63 21.2 0.33

31.44 -0.06 -0.78 18.2 0.02

31.42 -0.08 -0.97 15.2 0.20

31.46 -0.04 -0.46 12.2 0.54

31.50 0.00 -0.05 9.2 1.10

31.52 0.02 0.23 6.2 0.93

31.51 0.01 0.15 3.2 0.40

31.45 -0.05 -0.63 0.2 1.18

Weld Elevation 107.98

North 31.46 -0.04 -0.48 48.3

31.52 0.02 0.24 45.2

31.52 0.02 0.20 42.2

31.47 -0.03 -0.37 39.2

31.43 -0.07 -0.80 36.3

31.33 -0.17 -2.00 33.3

31.41 -0.09 -1.09 30.3

31.44 -0.06 -0.77 27.2

31.47 -0.03 -0.42 24.2

31.49 -0.01 -0.07 21.2

31.50 0.00 0.00 18.2

31.52 0.02 0.25 15.2

31.55 0.05 0.54 12.2

31.56 0.06 0.76 9.2

31.53 0.03 0.41 6.2

31.51 0.01 0.07 3.2

31.46 -0.04 -0.47 0.2

Weld Elevation 107.95

Northwest 31.41 -0.09 -1.05 48.3

31.42 -0.08 -1.01 45.3

31.39 -0.11 -1.36 42.3

31.37 -0.13 -1.53 39.3

31.46 -0.04 -0.51 36.3

31.53 0.03 0.32 33.2

31.56 0.06 0.77 30.2

31.58 0.08 0.96 27.2

31.60 0.10 1.19 24.2

31.59 0.09 1.03 21.2

31.57 0.07 0.89 18.2

31.59 0.09 1.13 15.2

31.56 0.06 0.69 12.2

31.51 0.01 0.15 9.2

31.50 0.00 -0.01 6.2

31.50 0.00 0.05 3.2

Weld Elevation 107.95

West 31.57 0.07 0.78 48.2

31.61 0.11 1.28 45.2

31.60 0.10 1.21 42.2

31.61 0.11 1.33 39.2

31.65 0.15 1.79 36.2

31.66 0.16 1.91 33.2

31.64 0.14 1.66 30.2

31.62 0.12 1.40 27.2

31.58 0.08 0.91 24.2

31.58 0.08 0.91 21.2

31.56 0.06 0.77 18.2

31.54 0.04 0.48 15.2

31.55 0.05 0.59 12.2

31.56 0.06 0.67 9.2

31.55 0.05 0.56 6.2

31.56 0.06 0.67 3.2

31.52 0.02 0.26 0.2

Weld Elevation 107.93

Southwest 31.55 0.05 0.59 48.1

31.58 0.08 0.99 45.1

31.58 0.08 0.90 42.1

31.59 0.09 1.05 39.1

31.62 0.12 1.39 36.1

31.63 0.13 1.54 33.1

31.64 0.14 1.70 30.1

31.63 0.13 1.53 27.1

31.59 0.09 1.08 24.1

31.58 0.08 0.96 21.1

31.56 0.06 0.76 18.1

31.56 0.06 0.77 15.1

31.58 0.08 1.00 12.1

31.60 0.10 1.15 9.1

31.56 0.06 0.70 6.2

31.52 0.02 0.26 3.2

31.45 -0.05 -0.56 0.2

Weld Elevation 107.93

SHELL SETTLEMENT SURVEY

Austin Brockenbrough & Associates, L.L.P.

Job No. 16-090.02 Location: Stewart ANG

Date: 06/08/2017 Subject: Tank Fac 7401 Shell Settlement Evaluation By: Bryan Strayer

API 653 Appendix B Optimum cosine curve, B 2.2.4.e)

Z = a + b x cos(theta + c)

Diameter (D) = 63 (ft)

Number of equally spaced data points (ft)= 8 L = Arc length between measurement points (ft) = 24.74 Tank Height (H) = 50.25 (ft)

Survey Height of

Position Weld * Z U S 0 7 107.93 0.00 -0.01 -0.01 0.00 1 8 107.93 0.00 0.01 0.01 0.01 2 1 107.96 0.03 0.04 0.01 0.03 3 2 108.04 0.11 0.08 -0.03 -0.04 4 3 108.03 0.10 0.09 -0.01 -0.01 5 4 107.98 0.05 0.08 0.03 0.02 6 5 107.95 0.02 0.04 0.02 0.02 7 6 107.95 0.02 0.01 -0.01 -0.02 8 7 107.93 0.00 -0.01 -0.01 0.00

Maximum out-of-plane deflection = 0.04

* = measured elevation

*HI (Height of Instrument) Z = calculated rigid body tilt (in)

U = out-of-plane settlement = S = out-of-plane deflection = z-y

Y = yield strength of shell material (PSI) = 30,000 E = Youngs modulus of elasticity (lbf/in2) = 29000000.00 S allowable (in) (API 653 B.3.2.1) = (L^2*Y*11)/(2EH)*12 = 0.83 in

R^2 =(Syy - SSE)/Syy = 0.80 not >=0.9 therefore cosine curve is invalid.

Evaluation by the Arc Length Method described in API 653 B.2.2.5.1 is required.

Austin Brockenbrough & Associates, L.L.P.

Job No. 16-090.02 Location: Stewart ANG

Date: 06/08/2017 Subject: Tank Fac 7401 Shell Settlement Evaluation By: Bryan Strayer

API 653 B.2.2.5.1 Evaluation by Settlement Arc Length Method

Per B.3.2.2, K = 10.5

Settlement arc length (ft), Sarc

Out of plate settlement at Point i (Si)

Allowable settlement at point i (Smax) = MIN[K*Sarc*(D/H)*(Y/E), 4]

Point Sarc (ft) Si (in) Smax

0 99.0 0.043 1.35 Si < Smax → OK

6 99.0 0.023 1.35 Si < Smax → OK

Evaluation of the settlement by the arc length method indicates the settlement is within acceptable limits.

-0.05

0.00

0.05

0.10

0.15

0 2 4 6 8 10

Measured Elevation (in)

Si6 Si0

SHELL THICKNESS CALCULATIONS

It is noted that because of the way technology has evolved, and as the exact location of the measurements vary, the measured minimum thickness of some of the shell plate may be less than, or even greater than, the previous measured thickness. There are a few locations on the tank roof and tank shell where we were unable to take accurate UT measurements. Additionally, in some cases the measured thickness is greater than the nominal thickness due to steel plate tolerances, which allow plus or minus 30 thousandths of an inch. However, this may not indicate a corrosion rate, unless there is significant coating failure and corrosion, which is unlikely with oil storage. Thinning of coated steel is due to abrasive blasting and not deterioration. Therefore, since the interior and exterior of the shell are coated and the current measurements indicate the same nominal thickness as the previous measurements with no significant deviation, the current corrosion rate is zero. Also, since the remaining thickness is greater than the required thickness, the expected service life is greater than 30 years. Therefore, per

API 653 the next ultrasonic thickness inspection of the shell should be performed in 15 years.

Job No.: 16-090.02

Job Title: Stewart ANG

Subject: Tank Facility 7401 Shell Thickness Evaluation

By: Bryan Strayer Date:

API 653

SHELL CALCULATIONS

Diameter 63 feet

Shell Height 50.25 feet

Freeboard 0 feet

Design Fill Height 50.25 feet

Specific Gravity 1.00 API 650

0.84 API 653

Joint Efficiency 0.85 API 650 Appendix A 7th Edition Assumed

Material unknown

Yield Strength 30,000 psi (assumed)

Tensile Strength 55,000 psi (assumed)

Original Design Corrosion Allowance

0.000 in (0 mm)

Required thickness:

Lower Upper

Two

Courses Courses

23600 26000

Height Product Required Thickness

Course (feet) Depth 1/4" min

6 10.00 8.25

5 8.00 16.25

4 8.00 24.25

3 8.00 32.25

2 8.00 40.25

1 10.00 50.25 min 2017 Corrosion Estimated UTM current net 1986 Rate Service Life Inspection

Course UTM thickness thickness * in/yr yrs. Interval

6 0.256 0.256 0.257 0.00002 >30 15

5 0.253 0.253 0.258 0.00015 >30 15

4 0.311 0.311 0.316 0.00015 >30 15

3 0.312 0.312 0.326 0.00046 >30 15

2 0.446 0.446 0.448 0.00005 >30 15

1 0.496 0.496 0.509 0.00041 >30 15

* The original thicknesses are assumed based on required design thicknessess, overtolerance, and the range of the UTMs.

0.131

0.199

0.1000.123

0.188

0.338

0.269

SE

2.6(H-1)D 2.6HDG

0.422

0.336

4/20/2017

Visual

Inspection

Interval

SE

2.6(H-1)DG

0.145

0.399

API-650 API-653

0.253 0.268 0.195

SE

20000 22500

Original

Design

0.059 0.062 0.100

Allowable Stress (psi)

Original

Hydro

0.318

SHELL/ROOF ULTRASONIC THICKNESS MEASUREMENTS

Brockenbrough personnel recorded the ultrasonic thickness measurements, shown on the following page, on 20

April 2017. There are a few locations on the tank roof and tank shell where we were unable to take accurate UT measurements. Refer to the tank drawings by others, which are included for reference in the pages that follow, for location of the shell plate measurements and layout of the tank. The values are in thousandths of an inch.

Job No.: 16-090.02

Job Title: Stewart ANG

Subject: Tank Facility 7401 Shell Thickness Evaluation

By: Bryan Strayer Date:

SHELL UTM DATA (0.001 inches)

DFT = 0.000 inches

Course 6 256 257 257 at Stairs

Course 5 257 263 253 at Stairs

Course 4 316 320 311 at Stairs

Course 3 352 315 312 at Stairs

Course 2 446 448 449 at Stairs

UTM's include 0 inch DFT coating.

1 4 7

2 5 8

3 6 9

Typical Shell Plate UTMs.

Course 1 1 2 3 4 5 6 7 8 9

1-1 497 507 498 511 519 512 513 517 515

1-2 503 500 511 514 506 521 513

1-3 498 508 498 499

1-4 535 526 514 507 510 519

1-5 511 505 508 504 500 508 503

1-6 504 508 507 496 498 511 511 506

* Unable to take UT measurements at certain places on the tank shell

Roof 188 186 198 194 188 192 193 190 195

UTs 194 196 197 189 189 190 192 189 199

4/20/2017

TANK DRAWINGS

The following tank drawings are taken from a previous API 653 Out-of-Service Inspection Report prepared by.

This data is included as a reference and should be used for informational purposes only.

OSHA ACCESS STRUCTURE REPORT

OSHA Stairway Data

Handrail Actual

(in)

OSHA Rq’d min (in) max (in)

Handrail Height 44 44 30 34 Step Width 30 30 22 NA Step Rise 9 9 NA NA

Bottom Step Rise 9 9 8 8

APPENDIX B: API 653 CHECKLISTS FOR TANK INSPECTIONS

UL SWRI

API Other

Protected

63'-0" diameter by 50'-3" tall

Type: Type:

Size: Date Installed:

SS End Conn: Size: 8" Material: SS End Conn: Size: 12"

Issue To:

Release Prevention Barrier

Overfill Protection / Level Alarms:

Independent High-high, High, Low Level Alarm & ATG Alarms High Level Control Valve (HLCV)

Receipt Piping Configuration Issue Piping Configuration

Tank Piping

Secondary Containment

September 2010 (assumed)

Tank Specifications

Previous Tank Inspection Date:

Continuous Release Detection Monitoring

Type:

Date Installed:

Current Product: N/A

Inspection Date:

Design Std

Tank Inspector Name:

Inspector Certification Number:

Overfill Protection:

NA

NA

NA

Useable Capacity:

Tank Construction and Configuration

Insulated

Coated

Plastic / Fiberglass

Other:

Jet Fuel (F-24)

25,000 BBL

Unknown

Butt Welded

70720

Horizontal Single Wall

Butt Welded

Pumphouse to Truck Fillstand/Hydrant System

Unknown

API 653 EXTERNAL INSPECTION CHECKLIST

Stewart ANG, NYProject Site:Project Name:

Project Location:

Brockenbrough Job No.:

SPCC Mandated AST Inspections - Group 3

Various Locations

General Inspection Information

16-090.02

Submitted to:

Contract No.:

USACE - Omaha

W9128F-12-D-0006

Tank Facility No.:

Local Tank ID No.:

April 20, 2017

Facility 7401

Tank Manufacturer:

Tank Construction Date:

Tank 39-400 (Tank 1) Bryan Strayer

Vertical

Rectangular

Double Wall

Fire Resistant

Closed Top Dike

Change of Service:

Last Repair:

Tank Coatings:

Exterior Coating:

Epoxy/Epoxy/Polyurethane

Epoxy (assumed)

Interior Coating:

Double Bottom

Unknown

Concrete Dike

180'-0" X 180'-0" X 6'-0"

Level Alarms:

Material:

Tank Outside Dimensions:

Nominal Capacity:

Secondary Containment, Overfill, and CRDM

Open Type Dike

September 2010

Receipt From: Truck Off-Load

API 653 EXTERNAL INSPECTION CHECKLIST

Stewart ANG, NYProject Site:Project Name: SPCC Mandated AST Inspections - Group 3

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A c)

TASK

Check for:

Tank Settlement

C.1.1.1 Concrete Ring

C.1.1.4 Rock

Review cathodic protection potential readings

Check for:

e)

Measure foundation levelness and bottom elevations (See Annex B) See survey data.

STATUS COMMENTS

Settlement around perimeter of tank

Check for:

d) a) b)

C.1.1.6 Housekeeping

Build-up of trash, vegetation, and other inflammables

Leaching of oil which has left rock filler exposed indicating hydrocarbon leakage

Tank settlement into asphalt base

Site drainage away from the tank, associated piping, and manifolds

Cavities under foundation; vegetation against bottom of tank

Broken concrete, spalling, and cracks, especially under backup bars used in welding butt-welded annular rings under the shell

Indications of bottom leakage at drain openings in ring, back of water-draw basins, and top surface of ring

ITEM

C.1.1 Foundation a) b)

Run-off rainwater from shell draining away from the tank

Check for:

b)

Settlements into the base

C.1.1.5 Site Drainage

Proper operation of dike drains

Check for:

Presence of crushed rock under the steel bottom which usually results in severe underside corrosion.

Check for :C.1.1.3 Oiled Dirt or Sand

C.1.1.7 Cathodic Protection a)

C.1.1.2 Asphalt

There are minor hairline cracks in some areas of the ringwall.

C.1.2.1 External Visual Inspection

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

C.1.2.3 Riveted Shell Inspection

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

C.1.2.4 Wind Girder (Floating Roof

Tanks) a)

Rivet and seam leaks on external surface

Check for:

Corrosion and thinning on plate and weld after cleaning the bottom angle area

Paint failures, pitting, and corrosion

Full fillet lap-welded vertical seams to increase joint efficiency b) c) c) b)

Reinforcing pads welded to shell at supports

Leaks and identify the location by sketch or photo

Check for:

Check for:

Broken welds and corrosion damage

(paint failure, pitting, corrosion, product build-up), especially where it occurs at tack-welded junction d)

Corrosion loss and wear on the rivets a) b)

c) Bottom-to-Foundation Seal

e) Drawings of riveted seams if available. Otherwise, dimension and sketch (or photograph) the rivet pattern: no. of rows, rivet size, pitch length, butt-riveted or lap-riveted joints a)

Grooving, corrosion, pitting, and coating failures

C.1.2.2 Internal (Floating Roof

Tank)

Some minor areas of coating failure and surface corrosion.

The seal was difficult to inspect due to the coating but appeared to be in good condition.

C.1.2. Shells

Check for:

Pitting on support welds to shell, especially on shell plates

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

ITEM TASK

a) Leaks at piping manifolds, flanges, and valves

Flange leaks and leaks around bolting

Shell plate dimpling around nozzles, caused by excessive pipe deflection c)

Check for:

C.1.3.3 Autogauge System Check for:

b)

COMMENTS

Cracks or signs of leakage on weld joint at nozzles, manholes, and reinforcing plates

Fire fighting system componentsb) c) d) e) f) g)

Anchored piping which would be hazardous to the tank shell or bottom connections during earth movement

Adequate thermal pressure relief of piping to the tank

Proper operation of regulators for tanks with purge gas systems

Leaks at sample connections and proper valve operation

Damage and test the accuracy of temperature indicators h)

C.1.3.1 Manholes and Nozzles

C.1.3.2 Tank Piping Manifolds

C.1.3 Shell Appurtenances

Damage on welds on shell-mounted davit clips above valves 6 inches and larger

Sealing of insulation around manholes and nozzles

e) Adequate manholes flange and cover thickness on mixer manholes

AFFF piping showed signs of coating failure.

d)

a) (2) Ground Level - 36-inch round manholes with davit arm.

(1) Pan Access - 36-inch round manhole with davit arm.

STATUS

a) Leaks on autogauge tape guide and lower sheave housing (floating swings)

b) Damage on autogauge head

Thermal relief piping is threaded in a few places, contains sight flow indicators, and does not have tetsing tees. Some valves are installed in horizontal position.

Check for:

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

c) Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

1 1/2"ø coated carbon steel.

h) Condition of board and legibility of board-type autogauges

Freedom of movement of marker and float i)

C.1.3.3 Autogauge System c) d)

C.1.3.4 Shell-mounted Sample

Station a) b)

Check for:

Function of valves and plugging in sample lines, including drain or return-to-tank line

Leaks in circulation pump and operating problems

Inspect condensate drain for presence of oil indicating leakage

C.1.3.5 Heater (Shell Manhole

Mounted)

C.1.3.6 Mixer Check for:

c) Condition of power lines and connections to mixer

Bracing and supports for sample lines and equipment b)

Proper mounting flange and support

Leakage e) f) g)

Proper movement of tape by bumping the checker on autogauge head

Size and construction material of the autogauge tape guide and make note

(floating roof tanks)

Proper movement of tape. Ask the operator if the tape tends to hang up during tank roof movement (floating roof tanks).

Actual product level compared to the reading on the autogauge. Make note. (max. variation is 2 in.)

No more than 2 feet of tape are exposed at the end of the tape guide when the roof is in lowest position

(floating roof tanks) a)

ITEM TASK STATUS COMMENTS

Varec = 21'-4 1/2"

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

b) Pass Fail N/A

Pass Fail N/A

Pass Fail N/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

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

ITEM TASK

Non-floating: Raise, then lower the swing line with the winch and check for cable lightness to confirm the swing line lowered properly

COMMENTS

C.1.3.7 Swing Lines: Winch a)

Operation

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 b) c)

C.1.3.8 Swing Lines: External

Guide System

Check for leaks at threaded and flanged joints

C.1.3.9 Swing Lines: Identify

Ballast Varying Need

Check for significant difference in stock specific gravity

Check for:C.1.3.10 Swing Lines: Cable

Material and Condition a) Corrosion over entire length, for non-stainless steel cable

Wear or fraying on all types of cable

C.1.3.11 Swing Lines: Product

Sample Comparison

Check for water or gravity differences that would indicate a leaking swing joint

C.1.3.12 Swing Lines: Target

STATUS

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

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 at the rafters in the center of the roof first.)

C.1.4.2 Deck Plate External

Corrosion

ITEM TASK

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.

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.

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

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 on a floating roof indicate inadequate drainage design or, if to one side, a nonlevel roof with possible leaking pontoons.)

STATUS

No access.

COMMENTS

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

STATUS COMMENTS

C.1.4.6 Roof Insulation Check for:

a) b) c)

Crack and leaks in the insulation weather coat where runoff rain water could penetrate the insulation

C.1.4.7 Floating Roof Seal a)

Systems

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).

Wet insulation under the weather coat

Corrosion on the roof plate and holes near the edge of the insulated area by removing small test sections of insulation

ITEM TASK

b) c) d) e) f) g)

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

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

Inspect visible metallic parts for corrosion and wear.

Inspect for openings in seals that would permit vapor emissions.

Inspect for protruding bolt or rivet heads against the shell.

1) ____________Opposite Pair 1; 2) ____________Opposite Pair 2Measure and record annular space at

30-ft spacing (minimum of four quadrants) around roof and record.

Measurements should be taken in directly opposite pairs.

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Check for:

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A 52' - 10 5/8"

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

ITEM TASK STATUS COMMENTS

C.1.4.7 Floating Roof Seal h)

Systems i) j)

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

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

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

C.1.5 Roof Appurtenances

C.1.5.1 Sample Hatch g) h)

Operation of system

Presence and condition of protective coating or liner inside sample hatch

(preventing rust from pipe getting into sample) on ultra clean stocks such as JP4 a) b) c) d) e) f)

Condition and functioning of sample hatch cover.

Condition of seal inside hatch cover on tanks governed by Air Quality

Monitoring District rules

Corrosion and plugging on thief and gauge hatch cover.

Marker and tab stating hold-off distance, where the sample hatch is used to reel gauge stock level

Reinforcing pad where sample hatch pipe penetrates the roof deck.

Operation of recoil reel and condition of rope on floating roof sample hatch and recoil systems

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

No scaffold supports.

ITEM TASK STATUS COMMENTS

No access.

b) Corrosion on the tape guide's and float guide's wire anchors

Corrosion and missing bolts on the hatch

Check for:

Check for:C.1.5.4 Autogauge: Inspection

Hatch & Guides (Fixed Roof) a)

C.1.5.2 Gauge Well Check for:

Valve leakage and for presence of a bull plug or blind flange, if the tank has a gauge well washer a) b) c) d) e)

Thinning, size of slots, and cover condition of the visible portion of the gauge well

A hold-off distance marker and tab with hold-off distance (legible)

Condition of roof guide for gauge well, particularly the condition of the rollers for grooving on floating roofs

The distance from the gauge well pipe to the tank shell at different levels, if accessible

C.1.5.5 Autoguage: Float Well

Cover a) Corrosion

Wear or fraying caused by rubbing of the tape cable on the cover b)

Inspect scaffold support for corrosion, wear and structural soundness.

C.1.5.3 Fixed Roof Scaffold

Support

C.1.5.6 Sample Hatch (Internal

Floating Roof) a) Overall conditions

Automatic sealing after sampling, when equipped with a fabric seal

Proper operations when equipped with a recoil reel opening device b) c)

C.1.5.7 Roof-Mounted Vents

(Internal Floating Roof)

Check for:

C.1.5.8 Gauging Platform Drip

Ring

Check condition of screens, locking and pivot pins.

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

The roof-mounted vents were welded shut and could not be opened.

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

No access but appeared to be in good condition.

1 1/2"ø handrail (carbon steel coated pipe).

Some minor spots of coating failure and light surface corrosion.

STATUS COMMENTS

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.

ITEM TASK

b)

C.1.6 Access Ways - See Tank Out-of-Service Inspection Checklist Item C.2.12

C.2.12 Access Structures

C.2.12.1 Handrails a) b) c)

Check for:

a) Condition of the screen on the rim vent cover

b) Plating off or removal of rim vents where jurisdictional rules do not permit removal

C.1.5.13 Pontoon Inspection a)

Hatches

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

C.1.5.9 Emergency Roof Drains

C.1.5.10 Removable Roof Leg

Racks

C.1.5.11 Vacuum Breakers

C.1.5.12 Rim Vents

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.

Check for leg racks on roof d)

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

Inspect for pitting and holes, paint failure.

Inspect attachment welds.

Identify cold joints and sharp edges.

Inspect the handrails and midrails.

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

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.

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Some minor spots of coating failure and light surface corrosion.

Valve Access Platform: 15' X 5' ; Pan Access Platform: 8'-4" X 36" ; Roof

Access Platform: 36" X…