Attachment K.2 - Dobbins-Fac 2015B (Tank 2)-2017.pdf

US Army Corps of Engineers Omaha District

API 653 In-Service (Draft) Inspection Report

Dobbins Air Reserve Base, GA Facility 2015B

Tank 2

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

USACE POL-TCX

26 April 2017

API 653 In-Service Inspection Report Dobbins ARB, Georgia

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

3. Future Projects

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. RECOMMENDED REPAIRS as Part of Regular Maintenance

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

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

SHELL ROUNDNESS SURVEY AND SETTLEMENT

SHELL THICKNESS CALCULATIONS

SHELL AND 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

AFFF Aqueous Film Forming Foam

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

DBB Double-Block-and -Bleed

FAC Facility

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

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

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 0029 to perform SPCC Mandated AST/UST Inspections at various locations. As required by this task, Brockenbrough executed a tank inspection site visit to Dobbins Air Reserve

Base located near Marietta, Georgia. An API 653 In-service (external) Inspection was conducted for Facility No.

2015B, locally known as Tank 2, on March 22, 2017. This inspection was performed in accordance with API

Standard 653, “Tank Inspection, Repair, Alteration, and Reconstruction,” and the referenced contract. All observations made during this in-service (external) inspection were made from the exterior of the tank.

Facility 2015B is a 35-foot diameter by 29-foot and 1-inch tall, single wall, vertical, field erected tank with a useable storage capacity of 3,500 barrels of jet fuel (F-24). The tank has a steel double deck internal floating roof and a retrofitted external overhanging corrugated and coated steel (barn) roof. A manufacturer’s data plate was not found. However, facility personnel indicated they believe the tank was constructed in 1954. A 2002 project completion report indicates the repairs completed at that time included replacing the tank bottom; providing an under-tank liner, cathodic protection, and leak detection; providing a 36-inch manhole in the floating roof and a double wiper perimeter seal; replacing the shell manhole with a 36-inch shell manhole; provided internal piping, and an 8-inch aluminum stilling well; and numerous other repairs.

Secondary containment is provided by concrete dike walls and basin. The dike drain was hydrostatically tested during the inspection. The leak detection ports and cathodic protection were also verified during the inspection.

Details of tank construction and appurtenances are included in the Tank Information Table on page 6 and 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’.

The next API Standard 653 In-Service (visual external) Inspection should be performed by March 2022. The next ultrasonic thickness inspection of the shell should be performed by March 2032. Calculations included in the 2011

Out-of-service Inspection Report indicated the expected service life of the tank bottom exceeds 20 years.

Therefore, and per API 653, the out-of-service inspection interval could have been scheduled for 20 years.

However, the report recommended an inspection interval of 10 years based on the military guidelines applicable at that time. The current UFC 3-460-03 also requires out-of-service inspection to occur at least every 10 years of service. However, an upcoming revision allows the frequency to be extended as determined by a certified API 653 tank inspector. Therefore, an Out-of-service Inspection should be performed by October 2031. This inspection should include an examination of the tank bottom by magnetic flux leakage (MFL or MFE) technology, and a thorough code compliance evaluation.

THIS INSPECTION

API In-service (External) Inspection Date: 22 March 2017 Equipment Used:

Survey Equipment Automatic Level: Topcon AT-BS Calibration: June 2016

Robotic/Reflectorless Total Station: Topcon QS X-Trac 8 Calibrated: December 2015

Field Data Collector: Topcon FC-2500

Ultrasonic Thickness Gauge Manufacturer: NDT Systems Model Number: Nova TG110-DL

Transducer: TG-560P (Thru Paint) Calibration Method: Calibration Block

NDT Technician (s): Mike O’Connor

Inspector(s): Mike O’Connor

PREVIOUS INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: October 2011 API In-Service (External) Inspection Date: NA

RECOMMENDED FUTURE INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: October 2031 API Ultrasonic Thickness Inspection of Shell Date: March 2032 API In-Service (External) Inspection Date: March 2022

Mike O’Connor Mechanical Designer API 653 Inspector No. 6230

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner U.S. Air Force

Location Dobbins Air Reserve Base

Facility Number 2015B

Tank Number Tank 2

State / Country Georgia / U.S.A.

City Marietta

Inspection Date March 22, 2017

Tank Manufacturer Unknown

Design Standard API 12C (assumed)

Date of Construction 1954 (per facility personnel)

Tank Contents Jet Fuel (F-24)

Tank Serial Number Unknown

Tank Diameter 35’-0”

Shell Height 29’-1” (nominal)

Product Height 29’-1” (limited by top of shell)

Tank Capacity 5,000 bbl nominal. 3,500 bbl useable.

Foundation Concrete Ringwall Flush with dike basin.

Construction

Bottom Double bottom. Thickness and weld type unknown. Cone down per 2002 completion report.

Shell 3rd through 5th Courses: 3/16-inch butt-welded plate.

1st and 2nd Course: 1/4-inch butt-welded plate.

Floating Roof Steel double-deck with double wiper seal.

Fixed Roof Overhanging corrugated and coated steel.

Material

Bottom Carbon steel of unknown grade.

Shell Carbon steel of unknown grade.

Floating Roof Carbon steel of unknown grade.

Fixed Roof Coated corrugated steel.

Cathodic Protection Impressed current.

Interior Coating System Interior assumed 100% coated, likely epoxy.

Exterior Coating System Epoxy/polyurethane assumed.

Level Gauging ITT Barton ATG, Varec tape gauge; 8” Aluminum manual gauge ladder well;

Vito water probe; Varec mechanical tape level gauge.

Overfill Protection Independent High and high-high level alarms, ATG Alarms, Float operated high level control valve (OCV).

Piping Receipt 6” Welded carbon steel

Issue 6” Welded carbon steel

Low Suction NA NA

Water Draw-off 1” Welded stainless steel

Level Alarms Scully low-low (2’-6”), low (3’-6”), high (23’-7”), and high-high (24’-11”), level alarms. ATG Alarms (measured approximate levels).

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 Tank Facility 2015B, an API Standard 653 In‐service (External) Inspection was performed.

2. Site Information

On March 22, 2017 Brockenbrough performed API 653 In‐Service (External) Inspection of Tank Facility

2015B (Tank 2) located at Dobbins Air Reserve Base in Marietta, Georgia. Dobbins Air Reserve Base is named in honor of Captain Charles M. Dobbins, a World War II C-47 pilot who died near Sicily. The installation is the home station of the host wing, the 94th Airlift Wing (94 AW) of the Air Force Reserve

Command (AFRC) and its fleet of Hercules C-130 aircraft, and is also the location of the headquarters for AFRC's Twenty-Second Air Force (22 AF). It is also home to the Army Aviation Service Facility #2

(AASF#2) of the Georgia Army National Guard and their fleet of UH-60 Blackhawks. Dobbins is also home to Marine and Navy Reserve units.

3. Future Projects

Facility personnel indicated that there are no future projects affecting the tank.

B. TANK INSPECTION COMMENTS

1. Tank Construction

Tank Facility 2015B is a nominal 5,000 bbl, 35‐foot diameter by 29-foot and 1-inch tall, aboveground, vertical, jet fuel, storage tank. The tank has a steel double deck internal floating roof, and a corrugated and coated steel overhanging external roof. Facility personnel indicated the tank was constructed in

1954. The 2002 Construction Report indicates a cone down, carbon steel, second bottom was installed at that time. Undocumented repairs performed since the 2011 out-of-service inspection report was written, include replacing the internal rolling ladder with a vertical ladder, installing the product return nozzle, and installation of an 8-inch ATG well.

2. Tank Foundation

The original tank bottom rests on what is likely a retrofitted concrete ring wall. The ringwall is flush with the secondary containment basin. A second bottom installed by the shell slotting method, rests on the abandoned portion of the shell approximately 10 inches above the original bottom. Four threaded and capped leak detection ports projecting through the abandoned shell (now foundation) provide leak detection. The foundation ringwall was visually evaluated during the inspection for broken concrete, spalling, cracks, and vegetation against the bottom of the tank. A shell settlement survey was performed during the inspection in accordance with Appendix B of API Standard 653. The shell settlement evaluation indicates the settlement of the bottom of the shell and perimeter of the tank bottom is acceptable.

https://en.wikipedia.org/wiki/World_War_II https://en.wikipedia.org/wiki/C-47 https://en.wikipedia.org/wiki/Sicily https://en.wikipedia.org/wiki/94th_Airlift_Wing https://en.wikipedia.org/wiki/Air_Force_Reserve_Command https://en.wikipedia.org/wiki/Air_Force_Reserve_Command https://en.wikipedia.org/wiki/Hercules_C-130 https://en.wikipedia.org/wiki/Twenty-Second_Air_Force https://en.wikipedia.org/wiki/Georgia_Army_National_Guard https://en.wikipedia.org/wiki/UH-60_Blackhawk https://en.wikipedia.org/wiki/United_States_Marine_Corps_Reserve https://en.wikipedia.org/wiki/United_States_Navy_Reserve

3. Tank Shell

The vertical and cylindrical shell consists of five butt‐welded courses. The exterior of the shell was visually inspected and evaluated for plumbness, roundness, peaking and banding. The shape of the shell does not appear to be within the allowable tolerances of API Standard 650. The lack of significant shell settlement suggests that tank was built out of round. However, the out of roundness does not seem to have any significant effect on the suitability of the tank for continued service. The coating was evaluated for deterioration. The ultrasonic thickness measurements of the shell and calculations included in Appendix A indicate the shell has more than 30 years of remaining life. The interior and exterior of the shell are coated and the exterior of the shell shows no sign of significant deterioration.

As the tank is used to store oil, deterioration of the interior of the shell since the previous inspection was performed is extremely unlikely. API 653 recommends ultrasonic thickness measurements of the shell be taken at least every 15 years.

4. Tank Appurtenances

a. Tank Roof

The tank’s corrugated and coated steel overhanging external roof is supported by vertical square tubing supports that rest on and are welded to the wind girder. The vertical roof supports also pass through and are welded to the rim angle. Condensation collects in the 1/4-inch gap between the vertical tubing roof supports and the shell, as indicated by the corrosion on the wind girder at the roof supports and on the shell behind the roof supports. The interior of the corrugated roof was examined from the gauging platform. There is some minor coating failure on the roof trusses. No other problems with the roof were noted.

b. Venting

The roof overhangs the shell and provides venting to the interior. The overhang is screened all around. The screens on the roof overhang are improperly installed in many areas and have large gaps.

c. Gauging

The tank’s ATG is manufactured by ITT Barton, and is installed through an 8‐inch full-length slotted gauge well. An adjacent 4-inch, full-length slotted, aluminum gauge well is fitted with a bling flange with two threaded and plugged holes. Manual gauging is performed through an 8-inch, fully slotted, aluminum, stilling well. The tank also has a Varec tape level gauge (autogauge), however, the tape is attached to the floating roof instead of to a float or weight resting on top of the floating roof.

d. Level Alarms

The tank has ATG alarms. The tank also has undocumented shell mounted low-low, low, high, and high-high level alarms. The alarms are noted in the 2011 out-of-service inspection report, but do not appear in the 2002 Final Construction Report. This suggests they were installed between 2002 and 2011. The flanges of the high and high-high level alarms are corroded.

e. Stairs and Platforms

The interior of the overhanging corrugated and coated steel roof is accessible by a circumferential stairway mounted on the shell of the tank. The upper portion of the stairway was extended outward prior to the 2002 repairs to accommodate the high level control valve float chamber that passes though the stairway upper steps. The high level alarms also pass through the stairway upper steps. The method used to extend the steps outward results in many unsealable flat surface-to-flat surface connections where water may collect and promote deterioration. The stairway top platform is inadequately supported on the outer edge and sags, which allows water to collect and to result in corrosion staining on the top of the platform. There is also corrosion on the balusters supporting the upper stairway handrail, which is observable only from the top of the stairs. The circumferential stairway step rise is generally 8 1/2 inches. The rise of the stairway bottom step above ground-level is 14 1/2 inches. OSHA requires the rise of stairway steps to be consistent from ground level to landing.

f. Grounding and Bonding

There are six grounding cables connected to ground lugs welded to the tank shell (foundation) below the second bottom.

5. Tank Coating

The interior appears to be 100% coated. The exterior coating is likely epoxy with a top coat of polyurethane. There is scattered corrosion on the underside of the wind girder. There is coating failure and corrosion on the water draw-off drain and return DBB valves.

6. Tank Piping System

Fuel is received into the tank via aboveground 6-inch aboveground carbon steel piping from the truck off-load stand adjacent to and north of the tank and is issued filtered via 6-inch aboveground carbon steel piping to the adjacent truck fillstand adjacent to and south of the tank. The water draw-off piping is connected by 1-inch stainless steel piping to a product saver tank located near the dike wall shared with the adjacent tank. The Product saver tank is also shared with the adjacent tank. Photographs in the 2011 out-of-service inspection report show the internal water draw-off piping drawing from a shallow (approximately 2 inches deep) tank bottom sump. Since the 2011 inspection, a product return shall nozzle has been installed and the product saver return pump has been connected to the product return shell nozzle by 1-inch stainless steel piping. There is no low suction piping; however, the main suction is near the sump and near to the tank bottom; and it appears the shared product saver tank may be used to transfer the fuel below the main suction to the adjacent tank. The same 1-inch product saver tank piping may be used to test the high level alarms and level control valve. The water draw-off system is unique, is not in accordance with the

DoD AST Standard AW 78-24-27; however, the tank is smaller than the smallest tank in the DoD

AST Standard and the system seems to work well for this size tank.

7. Fire Protection System

There are two fire hydrants within 300 feet of this tank.

8. Secondary Containment

The tank sits within a concrete secondary containment with concrete dike walls and basin. The secondary containment has a locked drain valve for drainage. The water level in the 24-inch diameter dike drain sump decreases less than 1/2-inch per hour with the dike drain valve closed. The secondary containment basin is sloped to a swale approximately 17 feet from the tank and to a drain located northeast of the tank. The receipt piping is routed over the swale north of the tank. The secondary containment was visually evaluated during the inspection. The volume of the secondary containment is sufficient to hold the contents of the tank full to the top of the tank shell as required by NFPA 30 plus more than one foot of freeboard as required by UFC 3-460-01 paragraph 8-14.2.1. There are numerous isolated holes in the secondary containment basin and dike wall expansion joints. The dike access concrete steps are not sealed to the dike wall. Tank bottom to ringwall foundation seal is failed sporadically around half of the tank circumference.

C. FINDINGS AND RECOMMENDATIONS

Tank Facility 2015B was found to be in generally fair condition. The tank is fully serviceable, with no mandatory deficiencies that would require immediate removal of the tank from service. However, there were several items observed, that are not in full compliance with federal, state, and local regulations 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, or the adjacent environment. The tank would have to be taken out-of-service to complete these repairs. 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, and includes repair recommendations and order of magnitude repair cost estimates. For basis of the cost estimate, it is assumed that the repairs will be completed by local action such as the Reoccurring

Maintenance and Minor Repair program.

a. Replace Overhanging Roof Vent Screens

OBSERVATION The roof overhangs the shell and provides venting to the interior. The overhang is screened all around. The screens on the roof overhang are improperly installed in many areas and have large gaps.

CODE REFERENCE: API 650 paragraph H-5.2.2 requires vent screens with 1/2-inch openings. DoD

Standard Design AW 78-24-27 requires the screen to be corrosion resistant.

RECOMMENDATION: Replace the vent screens on the roof overhang where they are improperly installed and/or have large gaps.

b. Repair the Circumferential Stairway

OBSERVATION: The circumferential stairway platform toeboards are not seal welded to the guardrail posts. The upper portion of the stairway was extended outward prior to the 2002 repairs to accommodate the high level control valve float chamber that passes though the stairway upper steps. The high level alarms also pass through the stairway upper steps. The method used to extend the steps outward results in many unsealable flat surface-to-flat surface connections where water may collect and promote deterioration. The stairway top platform deck plate is inadequately supported on the outer edge and sags, which allows water to collect, and which results in corrosion staining on the top of the platform. The circumferential stairway step rise is generally 8 1/2 inches.

The rise of the stairway bottom step above ground-level is 14 1/2 inches. OSHA requires the rise of stairway steps to be consistent from ground level to landing.

CODE REFERENCE: API 650, paragraph 5.1.3.7(a) and UFC 3-460-01, paragraph 8-11 require tank attachments (appurtenances) to be seal welded to inhibit corrosion streaking. 29 CFR 1910.24 paragraph (f) requires the rise of any flight of stairs to be uniform including at its base.

RECOMMENDATION: Seal weld the circumferential stairway platform toeboards to the guardrail posts. Replace the circumferential stairway upper steps that have been extended. Provide support for the outer edge of the stairway top platform deck plate. Provide a landing and step on the dike basin per OSHA for mounting the circumferential stairway.

c. Seal the Roof Supports to the Shell

OBSERVATION: The tank’s corrugated and coated steel, barn style, overhanging roof is supported by vertical square tubing supports that rest on, and are welded to, the wind girder. The vertical roof supports also pass through, and are welded to, the rim angle. Condensation collects in the 1/4-inch gap between the vertical tubing roof supports and the shell, as indicated by the corrosion on the wind girder at the roof supports and on the shell behind the roof supports.

CODE REFERENCE: API 650, paragraph 5.1.3.7(a) and UFC 3-460-01, paragraph 8-11 require tank attachments (appurtenances) to be seal welded to inhibit corrosion.

RECOMMENDATION: Seal the vertical tubing roof supports to the shell.

d. Repair External Coatings

OBSERVATION: There is corrosion on the wind girder at the roof supports and on the shell behind the roof supports, on the stairway top platform, roof access door, overhanging exposed roof support structure, upper handrail balusters, underside of the wind girder, high and high-high level alarm chamber flanges, and water draw-off drain and return 2-inch DBB valves. There is also corrosion on the conduit at the top and at the bottom of the stairs.

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

RECOMMENDATION: Repair the coatings on the wind girder at the roof supports and on the shell behind the roof supports, on the stairway top platform, upper handrail balusters, underside of the wind girder, and water draw-off drain and return 2-inch DBB valves. Repair the coating on the conduit at the top, and at the bottom, of the stairs.

e. Repair the Secondary Containment

OBSERVATION: There are numerous isolated holes in the secondary containment basin and dike wall expansion joints. The dike access concrete steps are not sealed to the dike wall. The original tank bottom-to-ringwall foundation seal is failed sporadically around half of the tank circumference.

REFERENCE: NFPA 30 paragraph 22.11.2.4 and CFR 112.7(c)(1) require dike areas to be liquid tight.

RECOMMENDATION: Replace the sealant in the secondary containment basin and dike wall expansion joints. Seal the dike access concrete steps to the dike wall. Replace the original tank bottom-to-ringwall foundation seal.

f. Provide Piping Flexibility

OBSERVATION: Caulking at the piping penetrations through the dike wall are torn or disbonded from the piping due to expansion and contraction of piping going straight to the tank without any flexibility allowance.

CODE REFERENCE: UFC 3-460-01, paragraph 9-3.3 requires piping to be arranged to provide for expansion and contraction caused by changes in ambient temperature.

RECOMMENDATION: Provide an expansion loop or offset in the product piping inside the dike area.

If there are compression seals behind the caulk, the caulk should be removed to expose the link seals. The piping coatings should be repaired at the dike wall penetrations. If there are no compression seals behind the caulk, they should be provided.

g. Modify Thermal Relief Piping

OBSERVATION: The thermal relief valves (TRVs) on the issue and receipt isolation valves are installed in the horizontal position; the TRV piping includes check valves, and does not have testing tees. There is also no upstream isolation valve on the receipt TRV piping.

CODE REFERENCE: The manufacturers of thermal relief valves recommend installing the valves in the vertical position to avoid trapping debris in the valve seats. UFC 3-460-01 paragraph 9-3.5 requires TRV piping around product piping isolation valves and isolation ball valves on the TRV piping inlet and outlet. UFC 3-460-03, 6-6.3.1 requires TRV testing be performed annually. DoD

Standard Design AW 78-24-27 requires testing tees on thermal relief piping. Check valves are not required with balanced type thermal relief valves.

RECOMMENDATION: Reinstall the issue and receipt thermal relief valves in the vertical position.

Demolish the check valve in the thermal relief valve piping. Provide the thermal relief valve piping with testing tees. Provide an upstream isolation valve for the receipt TRV.

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. Remove Soil and Plants from Dike Area

OBSERVATION: There is soil and plant growth in the dike area.

CODE REFERENCE: UFC 3-406-03, Section 8.10.2 requires regular inspection and removal of debris and vegetation from diked areas.

RECOMMENDATION: Inspect dike areas and remove soil and plant growth from the diked area on a regular basis.

b. Reinstall Bolting

OBSERVATION: Two of the eight all-thread bolts on the receipt nozzle isolation valve flange, penetrate only hallway through the nut. The situation could potentially result in a spill.

CODE REFERENCE: UFGS Specification 33 52 43.13 Aviation Fuel Piping paragraph 2.1.6 and ASME

B31.1 Power Piping paragraph 135.3.4 require bolting to be installed completely through the nut.

RECOMMENDATION: Reinstall the bolting on the receipt nozzle isolation valve flange. Ensure the bolts are installed completely through the nuts.

c. Provide Tank Markings

OBSERVATION: There are no NFPA 704 placards on the tank shell for warning emergency responders of the hazards. There are no confined space labels on the shell manholes. The tank is not labeled with the Tank Number or Facility Number.

CODE REFERENCE: UFC 3-460-01 paragraph 2-18 requires tanks to be labeled with the tank number and facility number. UFC 3-460-01 paragraph 2-18 and NFPA 30 paragraph 21.7.2.1 require tanks be labeled in accordance with NFPA 704 to provide hazard information to emergency responders.

29 CFR 1910.146 (c)(1) (OSHA) requires confined spaces in the work place to be identified by danger signs or by any other equally effective means, of the existence and location of and the danger posed by the permit spaces.

RECOMMENDATION: Provide a hazard warning label in accordance with NFPA 704. Provide signs on the shell manhole covers and on the railing of the internal ladder access platform to warn personnel of the existence and danger of the permit required confined spaces in accordance with OSHA. Label the tank to indicate the Facility Number and Tank Number.

d. Power Wash Stairs

OBSERVATION: There are bird droppings on the circumferential stairway steps.

CODE REFERENCE: API 571 Damage Mechanisms Affecting Fixed Equipment in the Refining Industry, paragraph 4.3.2.3.h) reads, “Bird turds can also cause accelerated corrosion and unsightly stains”.

RECOMMENDATION: Power washing of the stairway should be performed on a regular basis.

4. 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. Provide a Steel Cone Roof and Aluminum Internal Floating Pan

OBSERVATION: The Tank has a steel double deck internal (originally external) floating roof under a retrofitted, overhanging, corrugated and coated barn style roof. Many of the appurtenances listed in UFC 3-460-01 are not possible with this type of roof.

CODE REFERENCE: UFC 3-460-01 and DoD Standard Design AW 78-24-27 require an aluminum internal floating pan and a steel cone roof for new construction. Some of the items listed in UFC 3-

460-01, Table 8-1 that are incompatible with the current roof include: roof manhole, inspection hatches, bolted cover for pan installation, water bottom sample well near the sump, and scaffold cable supports.

RECOMMENDATION: Replace the existing steel double deck internal floating roof and overhanging, corrugated and coated, barn style roof, with an aluminum internal floating pan and a steel cone roof.

b. Modify Secondary Containment

OBSERVATION: The secondary containment basin is sloped to a swale approximately 17 feet from the tank. The receipt and issue piping is routed over the swale.

CODE REFERENCE: NFPA 30 requires secondary containment to be sloped away from the tank for a distance of 50 feet or to the dike wall, whichever is less, and away from product piping for a distance of 50 feet.

RECOMMENDATION: Modify the secondary containment and drain to slope way from the tank all the way to the dike wall, and away from the product piping.

c. Provide Upper Shell Manhole

OBSERVATION: There is no upper shell manhole or landing in the circumferential stairway for accessing the top of internal floating roof in high leg position.

CODE REFERENCE: UFC 3-460-01 Table 8-1, Items c and k require a shell manhole above the high position of the internal floating pan and a landing in the circumferential stairway for accessing.

RECOMMENDATION: Provide a shell manhole above the high position of the internal floating roof or new pan and a landing in the circumferential stairway for accessing.

Receipt Piping

Swale

Dike Drain

Issue Piping

d. Provide Landing for Accessing Tank Alarms and Controls

OBSERVATION: There is no landing in the circumferential stairway for accessing the level control float or level alarm chambers.

CODE REFERENCE: UFC 3-460-01 Table 8-1, Item k requires new storage tanks to be provided with a spiral stairway top platform for accessing the high level shut-off and alarms.

RECOMMENDATION: Provide a landing in the circumferential stairway for accessing and maintaining the high level shut-off and alarms.

APPENDIX A: ENGINEERING CALCULATIONS AND DRAWINGS

SHELL ROUNDNESS SURVEY AND SETTLEMENT

The shape of the shell appears to exceed the allowable API 650 tolerance of plus or minus 1/2-inch of a new tank shell radius. Based on the circumference of the shell measured near the bottom, the radius of the shell should be

17 feet and 6 inches. However, the measured radii of the shell, varies at the bottom from 17 feet 5 and 1/8 inches in the southwest to 17 feet 8 and 1/4 inches in the northwest. Also, the measured radii of the shell, varies at the top from 17 feet and 5 inches in the southwest to 17 feet 6 and 7/8 inches in the west. The tank bottom and roof should restrain the shell from deflection near the bottom and near the top. That there did not appear to be any significant distortion of the shell, would seem to suggest the tank was built out-of-round. It is noted that the tolerance for out-of-roundness has been included in API 650 since at least before 1993. API 650 1st Edition was published in 1960. However, it has not been until later years that the industry has had the laser surveying technology and methods available to it to measure it in the upper shell courses. It should be noted that API

653,10.5.3 – 3rd Edition (published in 2001), and later editions, allow the shell out-of-roundness (radial deviation), at higher than one foot above a bottom of a reconstructed tank, to be as much as three times greater (1 1/2 inches), a subject not addressed in API 653 prior to the year 2001. As measuring the out-of-roundness using such methods is not normally included in an API 653 Inspection of an existing and not reconstructed tank, and as the out-of-roundness does not appear to be a detriment to the structural integrity of the tank, no action is required or recommended at this time.

Austin Brockenbrough & Associates, L.L.P. Job No. 17-013.01

Location: Dobbins ARB Date: 04/13/2017

Subject: Tank 2015B Shell Radius Survey Page 1 of 4

Measured Circumference at Bottom = 109.96

Calculated Diameter = 35.00

Calculated Radius = 17.50

Distance Out

From Radial of

Centerline Deviation Deviation (in) Plumb (in)

South 17.46 -0.04 -0.43 0.197 S+N 0.29 -0.98

17.50 0.00 0.02 3.201 0.79

17.50 0.00 0.05 6.2 0.62

17.51 0.01 0.07 9.199 0.55

17.50 0.00 -0.02 12.201 0.25

17.50 0.00 -0.01 15.2 -0.16

17.49 -0.01 -0.13 18.204 -0.23

17.48 -0.02 -0.26 21.211 -0.31

17.49 -0.01 -0.13 24.206 -0.12

17.50 0.00 0.05 27.196 -0.16

Weld Elevation----> 105.07

Southeast 17.49 -0.02 -0.18 0.198 SE+NW 0.42 -0.18

17.55 0.05 0.64 3.201 1.76

17.59 0.09 1.03 6.189 2.10

17.58 0.08 0.92 9.179 2.42

17.56 0.06 0.68 12.176 2.05

17.55 0.05 0.55 15.173 2.40

17.53 0.03 0.40 18.177 2.57

17.54 0.04 0.48 21.165 3.12

17.53 0.03 0.41 24.164 3.18

17.55 0.05 0.59 27.143 2.92

Weld Elevation----> 105.08

Height

Above

Chime

Diameter

Deviation (in)

Location: Dobbins ARB Date: 03/01/2017

Subject: Tank 2015B Shell Radius Survey Page 2 of 4

Distance Out

From Radial of

Centerline Deviation Deviation (in) Plumb (in)

East 17.49 -0.01 -0.11 0.198 E+W 0.78 0.01

17.51 0.01 0.08 3.2 1.38

17.53 0.03 0.40 6.197 1.91

17.52 0.02 0.22 9.197 1.33

17.50 0.00 0.01 12.2 0.90

17.48 -0.02 -0.29 15.21 0.32

17.44 -0.06 -0.76 18.233 -0.08

17.46 -0.04 -0.43 21.222 0.28

17.47 -0.03 -0.36 24.221 -0.40

17.50 0.00 -0.04 27.202 0.20

Weld Elevation----> 105.10

Northeast 17.51 0.01 0.10 0.201 NE+SW -0.86 0.10

17.53 0.03 0.36 3.2 -0.31

17.52 0.02 0.23 6.197 -0.50

17.50 0.00 0.00 9.2 -0.79

17.48 -0.02 -0.23 12.208 -0.85

17.49 -0.01 -0.12 15.207 -0.88

17.49 -0.02 -0.18 18.211 -1.16

17.47 -0.03 -0.31 21.223 -1.31

17.47 -0.03 -0.31 24.228 -1.28

17.48 -0.02 -0.23 27.222 -1.02

Weld Elevation----> 105.10

Height

Above

Chime

Diameter

Deviation (in)

Subject: Tank 2015B Shell Radius Survey Page 3 of 4

Distance Out

From Radial of

Centerline Deviation Deviation (in) Plumb (in)

North 17.56 0.06 0.72 0.205 -1.13

17.56 0.06 0.77 3.199

17.55 0.05 0.58 6.195

17.54 0.04 0.48 9.192

17.52 0.02 0.28 12.193

17.49 -0.01 -0.14 15.205

17.49 -0.01 -0.10 18.203

17.50 0.00 -0.05 21.203

17.50 0.00 0.01 24.199

17.48 -0.02 -0.20 27.214

Weld Elevation----> 105.10

Northwest 17.55 0.05 0.60 0.205 0.60

17.59 0.09 1.13 3.199

17.59 0.09 1.07 6.19

17.63 0.13 1.50 9.173

17.61 0.11 1.37 12.164

17.65 0.15 1.85 15.136

17.68 0.18 2.17 18.107

17.72 0.22 2.64 21.065

17.73 0.23 2.77 24.034

17.69 0.19 2.33 27.042

Weld Elevation----> 105.08

Height

Above

Chime

Subject: Tank 2015B Shell Radius Survey Page 4 of 4

Distance Out

From Radial of

Centerline Deviation Deviation (in) Plumb (in)

West 17.57 0.07 0.89 0.205 1.64

17.61 0.11 1.30 3.201

17.63 0.13 1.51 6.191

17.59 0.09 1.12 9.186

17.57 0.07 0.89 12.184

17.55 0.05 0.61 15.186

17.56 0.06 0.67 18.179

17.56 0.06 0.71 21.174

17.50 0.00 -0.04 24.25

17.52 0.02 0.24 27.189

Weld Elevation----> 105.09

Southwest 17.42 -0.08 -0.96 0.19 -0.96

17.44 -0.06 -0.67 3.199

17.44 -0.06 -0.73 6.206

17.43 -0.07 -0.79 9.213

17.45 -0.05 -0.62 12.215

17.44 -0.06 -0.76 15.225

17.42 -0.08 -0.98 18.24

17.42 -0.08 -1.00 21.249

17.42 -0.08 -0.97 24.257

17.43 -0.07 -0.79 27.252

Weld Elevation----> 105.08

Height

Above

Chime

Location: Dobbins ARB Date: 4/13/2017

Subject: Tank 2015B - Shell Settlement Evaluation By: Mike O'Connor

API 653 Appendix B

Optimum cosine curve, B 2.2.4.e) Z = a + b x cos(theta + c)

Diameter (D) = 35 (ft)

Number of equally spaced data points (ft)= 8

L = Arc length between measurement points (ft) = 13.74

Tank Height (H) = 29.1 (ft)

Relative elevation of chime.

* Z U S

0 105.07 0.00 0.00 0.00 0.01

1 105.08 0.01 0.01 0.00 0.00

2 105.10 0.03 0.02 -0.01 -0.01

3 105.10 0.03 0.03 0.00 0.00

4 105.10 0.03 0.03 0.00 -0.01

5 105.08 0.01 0.03 0.02 0.02

6 105.09 0.02 0.02 0.00 -0.01

7 105.08 0.01 0.01 0.00 0.00

8 105.07 0.00 0.00 0.00 0.00

Maximum out-of-plane deflection = 0.02

* = measured elevation

*HI (Height of Instrument)

Z = calculated ridged body tilt (in)

U = out-of-plane settlement =

S = out-of-plane deflection z-y

Y = yield sterength of shell material (PSI) = 30,000

E = Youngs modulas of elasticity (lbf/in2) = 29*10^6

S allowable (in) (API 653 B.3.2.1) = (L^2*Y*11)/(2EH)*12 = 0.44 in

R^2 = (Syy - SSE) / Syy = 0.60 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.

Location: Dobbins ARB Date: 4/13/2017

Subject: Tank 2015B - Shell Settlement Evaluation By: Mike O'Connor

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 55.0 0.03 0.72 OK

5 16.0 0.02 0.21 OK

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

Si < Smax →

Si < Smax →

0.00

0.01

0.02

0.03

0.04

0 2 4 6 8 10

Measured Elevation (in)

Si5Si0

SHELL THICKNESS CALCULATIONS

Job No.: 17-013.01

Job Title: Inspect AST Dobbins AFB

Subject: FAC 2015B Shell Calculations

By: Mike O'Connor Date: 4/13/17

API-12C

API 653

SHELL CALCULATIONS

Diameter 35 feet Wind Velocity 125 mph

Shell Height 29.08 feet

Freeboard 0 feet Nom Shell Thk 0.181

Design Fill Height 29.08 feet

Specific Gravity 0.80 API 650 Maximum height of unstiffened shell: 37.2 feet

0.84 API 653

Joint Efficiency 0.85 API 650

Material unknown

Yield Strength 30,000 psi (assumed)

Tensile Strength 55,000 psi (assumed)

Original Design Corrosion Allowance

0.093 in (2mm)

Required thickness

Lower Upper

Two

CoursesCourses

Allowable Stress 23595 ####

Height Product Required Thickness

Course (feet) Depth 1/4" min

5 6.16 6.16

4 5.96 12.12

3 5.96 18.08

2 5.96 24.04

1 5.04 29.08 min 2017 Corrosion Estimated UTM Visual current net 1954 Rate Service Life Inspection Inspection

Course UTM* thick Thickness * in/yr yrs. Interval Interval

5 0.184 0.184 0.220 0.001 >30 15 5

4 0.202 0.202 0.220 0.000 >30 15 5

3 0.181 0.181 0.220 0.001 >30 15 5

2 0.246 0.246 0.250 0.000 >30 15 5

1 0.230 0.230 0.250 0.000 >30 15 5

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

P.O. Box 4800 4800 W. Hundred Road Chester, Virginia 23831 Phone: 804-748-8746 Fax: 804-748-7849 www.brockenbrough.com

0.107

0.100

2.6(H-1)DG

0.081

0.116

0.110

0.134

0.170

0.143

0.100

0.100

0.100

2.6HDG

SE

0.219

0.197

0.025

0.053

API-650

Original

Hydro

2250020000

API-653

Original

Design

SESE

(psi)

2.6(H-1)D

SHELL AND ROOF ULTRASONIC THICKNESS MEASUREMENTS

Job No.: 17-013.01

Job Title: Inspect AST Dobbins AFB

Subject: Tank 2015B UT Data

By: Mike O'Connor Date: 4/13/17

SHELL UTM DATA (0.001 inches)

1 4 7

2 5 8

3 6 9

Typical Shell Plate UTMs.

1 2 3 4 5 6 7 8 9

1-1 231 232 230 232 233 234

1-2 238 241 239 237 241 240

1-3 250 249 243 251 257 251 251 245 249

1-4 247 249 246 244 246 244

1-5 242 245 243 246 247 245

1-6 238 243 241 241 242 241 237 240 240

Insert Plates

I1 498 499 535 504 502 541

I2 544 548 494 501 498 494

UTMs Taken From Stairway

2-1 246 255 247

2-2

2-3

2-4

2-5

2-6

3-1 195 201 181 4-1 202 208 205 5-1 184 189 188

3-2 4-2 5-2

3-3 4-3 5-3 3-4 4-4 5-4 3-5 4-5 5-5

3-6 4-6 5-6

P.O. Box 4800 4800 W. Hundred Road Chester, Virginia 23831 Phone: 804-748-8746 Fax: 804-748-7849 www.brockenbrough.com

TANK DRAWINGS,

The following drawings are pages extracted from the 2011 out-of-service inspection report.

OSHA ACCESS STRUCTURE REPORT

OSHA Circumferential Stairway Data

OSHA Rq’d Actual

(in) min (in) max (in)

Handrail Height 29 1/2 OK 30 34 Step Width 30 OK 22 NA

Step Rise 8 1/2 OK NA NA Bottom Step Rise 14 1/2 Not OK 9 1/2 10 1/2

BOTTOM STEP

RISE

APPENDIX B: API 653 CHECKLISTS FOR TANK INSPECTIONS

UL SWRI

API Other

Protected

Type: Type:

Size: Date Installed:

Carbon Steel End Conn: Size: 6" Material: Carbon Steel End Conn: Size: 6"

Issue To:

Interior Coating:

Double Bottom

Unknown

Concrete

91' by 91' by 5'

Level Alarms:

Material: Welded

Coated

Plastic / Fiberglass

Other:

Closed Top Dike

Change of Service:

Last Repair:

Tank Coatings:

Exterior Coating:

Epoxy - Polyurethane (assumed)

Epoxy (assumed)

Tank Outside Dimensions:

Insulated

Tank Facility No.:

Local Tank ID No.:

March 22, 2017

2015B

Tank Manufacturer:

Tank Construction Date:

Tank 2

Single Wall

Tank Inspector Name:

Jet A(F-24)

5000 bbl

3500 bbl

API 653 EXTERNAL INSPECTION CHECKLIST

Dobbins AFBProject Site:Project Name:

Project Location:

Brockenbrough Job No.:

SPCC Mandated AST Inspections - Group 5

Various Locations

General Inspection Information

17-013.01

Submitted to:

Contract No.:

USACE - Omaha

W9128F-12-D-0006

Inspection Date:

Design Std

Horizontal

Mike O'Connor

2003 new bottom

Receipt From:

Inspector Certification Number:

Tank Construction and Configuration

Rectangular

Double Wall

Fire Resistant

Secondary Containment, Overfill, and CRDM

Welded

Refueler truck via loading stand issue filter-separators

35'-0" dia by 29'-1"

NA

Commercial truck via off-load stand receipt filter-separators

FML

Nominal Capacity:

Useable Capacity:

Open Type DikeVertical horizontal leak detection ports

Overfill Protection:

Release Prevention Barrier

Overfill Protection / Level Alarms:

High-high, High, Low, and Low-low 6" hydraulic operated diaphragm control valve, OCV, SS

Receipt Piping Configuration Issue Piping Configuration

Tank Piping

Secondary Containment

Oct 2011 (OOS)

Tank Specifications

Previous Tank Inspection Date:

Continuous Release Detection Monitoring

Type:

Date Installed:

Current Product:

API 653 EXTERNAL INSPECTION CHECKLIST

Dobbins AFBProject Site:Project Name: SPCC Mandated AST Inspections - Group 5

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

Proper operation of dike drains

Check for: Some small plants growing in windblown dirt in dike area.

C.1.1.7 Cathodic Protection a) b)

C.1.1.6 Housekeeping

Buildup of trash, vegetation, and other inflammables

Settlements into the base

C.1.1.2 Asphalt d) a)

3V, 3.3 A b)

c) 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

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

Tank settlement into asphalt base

Review cathodic protection potential readings

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

Check for:

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

C.1.1.4 Rock

C.1.1.5 Site Drainage

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

ITEM

C.1.1 Foundation

Tank bottom to ringwall foundation seal failure sporadically around 1/2 of tank circumference.

Swale is 17 feet from tank. Receipt piping over swale.

Check for:

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

Run-off rainwater from shell draining away from the tank

Check for :C.1.1.3 Oiled Dirt or Sand

e) Settlement around perimeter of tank

Check for:

STATUSTASK

Check for:

Tank Settlement

COMMENTS

C.1.1.1 Concrete Ring

C.1.2.1 External Visual Inspection

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A No access

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)

Pitting on support welds to shell, especially on shell plates b)

Check for:

Grooving, corrosion, pitting, and coating failures a) b) c) a) d)

C.1.2. Shells

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

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

Corrosion loss and wear on the rivets

C.1.2.2 Internal (Floating Roof

Tank)

Check for:

c)

Broken welds and corrosion damage

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

Reinforcing pads welded to shell at supports

Leaks and identify the location by sketch or photo

C.1.2.4 Wind Girder (Floating

Roof Tanks) a)

Check for:

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

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

Adequate manholes flange and cover thickness on mixer manholes

Caulk at piping penetrations at dike wall are torn due to expansion and contraction of piping going straight to tank without any flexibility allowance.

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

b) Damage on autogauge head

Check for:

C.1.3.3 Autogauge System

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

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

COMMENTSTASK

e)

ITEM

Fire fighting system componentsb)

C.1.3.2 Tank Piping Manifolds b)

Check for:

Flange leaks and leaks around bolting d)

a) Leaks at piping manifolds, flanges, and valves

C.1.3 Shell Appurtenances

STATUS

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

Check for:

c)

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

C.1.3.1 Manholes and Nozzles c) d) a)

Leaks at sample connections and proper valve operation

Damage and test the accuracy of temperature indicators e)

TRVs installed horizontal, piping is SS with no electrical isolation, no isolation valve upstream, and no testing tee.

Proper operation of regulators for tanks with purge gas systems

Receipt nozzle bolting not properly installed. Bolts penetrate only halfway through the nuts.

Sealing of insulation around manholes and nozzles

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

Attached to pan.

f)

C.1.3.6 Mixer

Leaks in circulation pump and operating problems c) a) b)

ITEM TASK STATUS

C.1.3.3 Autogauge System c) d)

C.1.3.4 Shell-mounted Sample

Station (PST) a)

Inspect condensate drain for presence of oil indicating leakage

C.1.3.5 Heater (Shell Manhole

Mounted) e) g)

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)

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

i) Freedom of movement of marker and float

COMMENTS

Proper mounting flange and support

Leakage

Tape 20'-3 3/16"; ATG 20'-3 7/16"

Condition of power lines and connections to mixer

Check for:

b)

Proper movement of tape by bumping the checker on autogauge headSize 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).

Check for:

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

Bracing and supports for sample lines and equipment

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

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.1.3.7 Swing Lines: Winch a)

Operation

C.1.3.12 Swing Lines: Target b)

ITEM TASK

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

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

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

STATUS COMMENTS

Indicator: Check that the indicator moves in the proper direction.

Floating swing line indicators show a lower level as cable is wound up on the winch. Non-floating swing line indicators show the opposite c)

C.1.3.8 Swing Lines: External

Guide System

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

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

C.1.4.2 Deck Plate External

Corrosion

STATUS

C.1.4.4 Level of Floating Roof At several locations, measure distance from roof rim to a horizontal weld seam above the roof.