Attachment K.1- Tank 09650 Inspection Report.pdf

US Army Corps of Engineers

Omaha District

API 653 In-Service

Inspection Report

Fort Lewis, Washington

FAC 09650

Tank 1

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

USACE POL-TCX

5 July 2017

API 653 In-Service Inspection Report Fort Lewis, Washington

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. 0024 to perform API Standard 653 In-Service Inspections. As required by this task, Brockenbrough executed a tank inspection site visit to Fort Lewis, located at Tacoma, Washington. An API 653 In-Service (visual external) Inspection was conducted for Tank Facility No. 09650 (Tank 1) on February 28, 2017. This inspection was performed in accordance with API Standard 653, “Tank Inspection, Repair, Alteration, and Reconstruction,” and the referenced contract. The confined space between the internal floating roof and the fixed roof was not entered during the inspection. All observations made during this in-service (visual external) inspection were made from the exterior of the tank.

Tank Facility 09650 is a 31-foot diameter by 22-foot tall, single wall, vertical, field erected tank with a nominal storage capacity of 3,000 barrels of jet fuel (F-24). Since, the tank did not have a data plate attached to the tank shell, the tank manufacturer and construction date of the tank are unknown. However, based on the previous tank inspection report, it is known that the tank was fabricated by Morse Construction Group, Inc. in 1997. Secondary containment is provided by a concrete containment area with vertical concrete dike walls shared by adjacent Tank 2 (Facility 09651). The previous API 653 Out-of-Service Inspection report indicates that this tank is built on a concrete ringwall and a sand pad with a thick, non-conductive film liner underneath the tank bottom which serves as a release prevention barrier. Since there are no as-built drawings of the tank available at this time, the presence of a release prevention barrier could not be confirmed. 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’.

There is a FY18 MILCON project to relocate the aviation fuel system. As part of this project, this tank will be demolished. However, if the project to relocate the tanks does not move forward, perform future inspections per this report. The next API Standard 653 In-Service (visual external) Inspection should be performed by an API 653 Inspector by February 2022. The next ultrasonic thickness inspection of the shell should be performed by February 2032. A previous out-of-service inspection report indicates that the tank was inspected in October 2006.

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. As the tank was inspected in October 2006, we recommend the next API Standard 653 Out-Of-Service (internal and external) Inspection should be performed by October 2026. 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. This inspection should include a thorough code compliance evaluation as well.

THIS INSPECTION

API In-Service (External) Inspection Date: 28 February 2017 Equipment Used: Ultrasonic Thickness Gauge Manufacturer: NDT Systems Model Number: Nova TG110-DL Calibration Method: Calibration Block Inspector(s): Jeffrey W. King

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

PREVIOUS INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: October 2006 API In-Service (External) Inspection Date: Not Available

RECOMMENDED FUTURE INSPECTION DATES

API Out-of-Service (Internal) Inspection Date: October 2026 API Ultrasonic Thickness Inspection of Shell Date: February 2032 API In-Service (External) Inspection Date: February 2022

It may be more cost effective to perform the internal inspection to coincide with the UT inspection. A reasonable compromise may be to perform both inspections, and the repairs recommended in the previous inspection report, in 2026.

Jeffrey W. King, PE Mechanical Engineer API 653 Inspector No. 54102

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner U.S. Army

Location Fort Lewis

Facility Number Facility 09650

Tank Number Tank 1

State / Country Washington / U.S.A.

City Tacoma

Inspection Date February 28, 2017

Tank Manufacturer Morse Construction Group, Inc. (Per previous tank inspection report)

Design Standard API Std 650 (Per previous tank inspection report)

Date of Construction 1997 (Per previous tank inspection report)

Tank Contents Jet Fuel (F-24)

Tank Serial Number Unknown

Tank Diameter 31’-0” (Per previous tank inspection report)

Shell Height 22’-0” (Per previous tank inspection report)

Product Height 2’ – 8 3/4” (Tape Level Gauge reading at the time of inspection)

Tank Capacity 3,000 barrels (Nominal capacity)

Foundation Sand filled Concrete Ringwall (Per previous tank inspection report)

Construction

Bottom Lap-welded cone down bottom with a butt-welded annular ring (Per previous tank inspection report)

Shell (3) butt-welded shell courses

Floating Roof N/A

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

Material

Bottom A36 Carbon steel (Per previous tank inspection report)

Shell A36 Carbon steel (Per previous tank inspection report)

Floating Roof N/A

Fixed Roof A36 Carbon steel (Per previous tank inspection report)

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; MTS Automatic Tank Gauge (ATG)

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

Piping Receipt 4” Stainless Steel

Issue 4” Stainless Steel

Low Suction 3” Stainless Steel

AFFF 2” Carbon Steel

Water Draw-Off 3/4” Stainless Steel

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

Type of Internal Floating Roof N/A

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 09650, 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 February 28, 2017 Brockenbrough performed an API 653 In‐Service (visual external) Inspection of

Tank Facility 09650 located at Fort Lewis. Fort Lewis is a located 9.1 miles south-southwest of Tacoma, Washington, under the jurisdiction of the United States Army Joint Base Garrison, Joint Base Lewis–

McChord. Joint Base Lewis-McChord is a training and mobilization center for all services and is the only

Army power-projection base west of the Rocky Mountains. It has more than 25,000 soldiers and civilian workers. The strategic location of the base provides Air Force units with the ability to conduct combat and humanitarian airlift with the C-17 Globemaster III.

B. TANK INSPECTION COMMENTS

1. Tank Construction

Tank Facility 09650 is a nominal 3,000 barrel, 31-foot diameter by 22-foot tall, F-24, aboveground vertical storage tank. Per the previous tank inspection report, the tank was constructed by Morse

Construction Group, Inc. to API 650 design standard in 1997. Base personnel have strapping tables for determining tank volume, although the existing strapping tables are not certified by a professional engineer. However, they appear to be adequate for the operation of this tank.

2. Tank Foundation

The tank rests on an 18-inch high sand filled concrete ringwall foundation. Per the previous out-of-service tank inspection report, this tank is equipped with a release prevention barrier (thick film liner) underneath the tank. However, this could not be verified during the inspection. 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 have failed. 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 three 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 1-5/16 inches for this 22-foot tall tank.

The maximum measured out-of-plumbness was 1-3/16 inches away from the center of the tank measured on the south. 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 1/2-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 15 feet and 6 inches. However, the measured radius of the shell varies at the bottom from 15 feet and

5-5/16 inches in the south to 15 feet and 6-3/8 inches in the northwest. Also, the measured radii of the shell, varies near the top from 15 feet and 5-1/2 inches in the southwest and to 15 feet and 6-3/4 inches in north. The bottom and top of the shell are 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) 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 the tank bottom extension. Some mold and algae were also observed on the tank bottom extension. The shell-to-bottom weld appeared to be coated with a joint sealant. 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, center vent, flanges, manholes, nozzles and nozzle reinforcing pads, nuts, and bolts. There was moderate coating failure and corrosion from welded steel angle/treads to the center vent. Additionally, corrosion staining from nozzle reinforcing pads and angle/treads to the center vent was noted in several locations on the roof.

b. Venting

This tank features a 6-inch Varec pressure/vacuum center vent with a 4-inch nozzle and 24-inch

Varec emergency vent. These vent/hatches provide adequate venting capacity based on the size of the tank. This tank is not equipped with any overflow vents/inspection hatches.

c. Gauging

The tank’s MTS ATG is installed through a 6-inch nozzle mounted on the 36-inch roof manhole cover. The tank also has a Varec tape level gauge whose reading aligns closely with the MTS ATG reading. This tank is not equipped with a 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-low, low, high and high-high level alarms independent of the tank gauging system as is required by military criteria.

e. Stairs and Platforms

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

There are no reinforcing pads on the platform plate and on the stairway steps where they are welded to the tank shell. The circumferential stairway is directly welded to the shell. The coating system on the circumferential stairway appeared to be good condition. The width and rise of the stairway steps and the height of the handrails appear to be in general compliance with OSHA criteria.

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 appeared to be a standard military coating system (epoxy-epoxy-polyurethane). Minor coating failure and corrosion were observed on several places on the tank bottom extension, tank roof, shell manhole covers, and bolts. There was some mold and algae growth observed on the tank bottom extension.

6. Tank Piping System

Fuel is received through 4‐inch stainless steel piping from an adjacent Truck Off-load Station and is issued through 4-inch stainless steel piping to the adjacent Truck Fillstands. Corrosion was observed on carbon steel bolts that are used on stainless steel pipe flanges.

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 shared by adjacent Tank Facility 09651 (Tank 2). There is no intermediate dike wall present between the two tank containment areas. The secondary containment was visually evaluated during the inspection. There is a small amount of leaves and vegetation located in the secondary containment area. The product piping is located over the drainage swale and water tends to collect underneath it.

The containment is of sufficient size to contain a total tank loss plus one foot of freeboard.

C. FINDINGS AND RECOMMENDATIONS

Tank Facility 09650 was found to be in generally good condition. The tank is fully serviceable. However, there were also several items observed that are not in full compliance with federal, state, and local codes or military criteria. For basis of the estimated costs, the total for each repair is a rough order of magnitude cost that includes the cost to perform the repair and limited contractor mark-ups. These totals do not include mobilization to the site, supervision, inspection, and overhead, or other construction expenses.

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 several areas within the concrete ringwall foundation. Some sections of the ringwall appeared to have been previously repaired but have failed again.

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 and concrete dike wall with a fuel resistant sealant.

b. Repair Coating System on Tank and Tank Appurtenances

OBSERVATION: Localized coating failure and minor corrosion were observed on several places on the tank shell, tank roof, roof appurtenances, roof guardrail (at the base), tank bottom extension, and manhole covers and bolts. Several areas on the tank roof like the manhole covers, flanges, bolts and nuts, nozzle reinforcing pads, etc. were found to be corroded. Also, corrosion staining was observed at the welded steel angle/treads to the center vent on the tank roof.

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

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Sticky Note POL-MCX: Perform as part of regular maintenance if tank is to remain.

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Sticky Note POL-MCX: Perform as part of regular maintenance if tank is to remain.

criteria. The nuts and bolts should be removed and replaced with corrosion resistant nuts and bolts.

c. Repair the Tank Bottom Extension and Bottom-to-Foundation Seal

OBSERVATION: The tank bottom extension does not promote positive drainage away from the tank shell. Joint sealant has been applied on the tank bottom extension to enable water to shed from the tank shell. This sealant is severely deteriorated and cracked. Also, the tank bottom-to-foundation seal has deteriorated and dry-rotted as well. It appears to have been pulled away from the steel annular plate. Evidence of corrosion and coating failure at the tank bottom extension was observed.

CODE REFERENCE: UFC 3-460-03, Section 8-4.10 B, requires the seal to be maintained in good working order to prevent corrosion of the underside of the tank bottom.

RECOMMENDATION: Remove the joint sealant from top of the tank bottom extension and the bottom-to-foundation seal. Prep and coat the chime per AST standards and replace the tank bottom-to-foundation seal. Apply new sealant on top of the tank bottom extension to provide proper drainage.

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d. 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.

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e. Replace Flexible Conduit

OBSERVATION: The conduit associated with the Varec tape level gauge is dry-rotted and cracked.

CODE REFERENCE: N/A

RECOMMENDATION: Replace the broken flexible conduit for the Varec tape level gauge.

f. Replace Carbon Steel Bolts

OBSERVATION: The carbon steel bolts used in several places on the stainless steel pipe flanges are heavily corroded. Carbon steels bolts have the potential to corrode rapidly when in contact with stainless steel.

CODE REFERENCE: N/A

RECOMMENDATION: Replace the carbon steel bolts with stainless steel bolts.

POL-MCX: Perform as part of regular maintenance if tank is to remain.

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g. Repair ATG Water Probe

OBSERVATION: Based on information provided by facility personnel, it was found that the ATG water probe is not functioning correctly and sounds faulty alarms several times a day.

CODE REFERENCE: N/A

RECOMMENDATION: The reason for the faulty water probe needs to be investigated by the ATG manufacturer’s representative and the probe needs to be repaired or replaced.

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.

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: 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, replace all threaded piping and fittings in the thermal relief system with welded connections.

Upgrade the thermal relief piping at the tank shell to 2-inch and provide a 2-inch double block and bleed valve at the skin of the tank. Provide testing tees and remove sight flow indicators associated with the thermal relief system.

POL-MCX: Concur with recommendation.

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. Modify Secondary Containment Basin

OBSERVATION: The piping headers are routed directly over the dike low points and water tends to pond underneath the piping.

CODE REFERENCE: NFPA 30, paragraphs 22.11.1.1 & 22.12.2.1 require drainage to be provided to prevent accumulation of any liquid under piping by providing a slope of not less than 1 percent away from the piping for at least 50 feet or to the bottom of the dike.

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, modify the secondary containment basin to provide drainage away from the piping and the tank as required by NFPA 30.

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Sticky Note POL-MCX: Concur with recommendation.

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POL-MCX: Leave as is

d. 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: 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, provide two scaffold cable supports in accordance with API 650.

e. Provide a Sample Hatch/Gauge Well

OBSERVATION: The tank does not have any stilling wells with a hatch for manual gauging/sampling.

CODE REFERENCE: UFC 3-460-01, Table 8-1, Item t requires one 10-inch (250 mm) roof nozzle and an 8-inch aluminum, slotted stilling well for gauging and sampling; AW 78-24-27 requires the manual gauging and sampling well to be near the perimeter.

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, a sampling/gauging well with roof nozzle and hatch should be provided near the perimeter of the tank roof.

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Sticky Note POL-MCX: Leave as is

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f. Provide Low-low Level Alarm

OBSERVATION: The Scully level switches/alarms monitor high-high, high, and low levels only.

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

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, make modifications to the Scully level alarm system to provide low-low level alarm as well.

g. Provide Intermediate Containment Wall

OBSERVATION: There is no intermediate containment wall between the two tanks – Facility

09650 and 09651.

CODE REFERENCE: NFPA 30 Section 22.11.2.6 requires that each diked area containing two or more tanks shall be subdivided, preferably by drainage channels or at least by intermediate dikes, in order to prevent minor spills from a tank from endangering adjacent tanks within the diked area.

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, provide an 18-inch high intermediate concrete containment wall between the two tanks.

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Sticky Note POL-MCX: Concur with recommendation.

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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.

a. Remove Vegetation within the Dike Area

OBSERVATION: There is buildup of dried leaves and other vegetation in the dike area.

CODE REFERENCE: NFPA 30, paragraph 6.9.4 requires dike areas to be kept free of weeds and other unnecessary combustible materials. UFC 3-460-03, 8-4.3.1, 8-10.2.1, 8-10-3.1,8-10.5.1, and UFC 3-

460-03, Appendix C requires vegetation to be removed from dike areas in addition to applying an herbicide.

RECOMMENDATION: Remove all vegetation from the dike area and perform regular maintenance to prevent deterioration of the containment slab. Apply an herbicide on a regular basis to prevent any future growth/vegetation.

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 1/2-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 15 feet and 6 inches. However, the measured radius of the shell varies at the bottom from 15 feet and 5-5/16 inches in the south to 15 feet and 6-3/8 inches in the northwest. Also, the measured radii of the shell, varies near the top from 15 feet and 5-1/2 inches in the southwest and to 15 feet and 6-

3/4 inches in north. The bottom and top of the shell are 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. Job No. 16-095.04

Location: Tank 1 (Fac 09650) Fort Lewis Date: 05/02/2017

Subject: Shell Radius Survey Page 1 of 3

Measured Circumference at Bottom = 97.39

Calculated Diameter = 31.00

Calculated Radius = 15.50

Distance

From Radial

Centerline Deviation Deviation (in)

South 15.44 -0.06 -0.77 0.177 S+N -0.50

15.46 -0.04 -0.47 3.191 0.11

15.49 -0.01 -0.13 6.199 0.66

15.51 0.01 0.06 9.2 0.97

15.49 -0.01 -0.13 12.202 0.62

15.49 -0.01 -0.12 15.204 0.60

15.52 0.02 0.20 18.191 0.95

15.53 0.03 0.40 21.178 1.08

Weld Elevation----> 107.95

Southeast 15.48 -0.02 -0.22 0.204 SE+NW 0.10

15.52 0.02 0.25 3.203 0.71

15.53 0.03 0.32 6.201 0.88

15.53 0.03 0.32 9.199 0.94

15.52 0.02 0.26 12.199 0.65

15.51 0.01 0.16 15.198 0.68

15.51 0.01 0.10 18.197 0.61

15.49 -0.01 -0.14 21.204 0.41

Weld Elevation----> 107.94

East 15.48 -0.02 -0.25 0.204 E+W -0.25

15.52 0.02 0.24 3.203 0.49

15.53 0.03 0.37 6.201 0.62

15.52 0.02 0.24 9.199 0.34

15.50 0.00 0.01 12.199 -0.10

15.52 0.02 0.18 15.198 -0.07

15.51 0.01 0.14 18.197 0.18

15.50 0.00 0.04 21.204 0.22

Weld Elevation----> 107.94

Height

Above

Chime

Diameter

Deviation (in)

Subject: Shell Radius Survey Page 2 of 3

Distance

From Radial

Centerline Deviation Deviation (in)

Northeast 15.52 0.02 0.18 0.203 NE+SW -0.31

15.53 0.03 0.30 3.204 0.11

15.52 0.02 0.24 6.201 0.07

15.52 0.02 0.19 9.199 0.11

15.51 0.01 0.10 12.2 -0.08

15.50 0.00 -0.05 15.2 -0.40

15.49 -0.01 -0.08 18.202 -0.38

15.47 -0.03 -0.37 21.213 -0.89

Weld Elevation----> 107.94

North 15.52 0.02 0.26 0.238

15.55 0.05 0.58 3.196

15.57 0.07 0.79 6.205

15.58 0.08 0.91 9.194

15.56 0.06 0.76 12.185

15.56 0.06 0.72 15.177

15.56 0.06 0.74 18.167

15.56 0.06 0.68 21.161

Weld Elevation----> 107.91

Northwest 15.53 0.03 0.31 0.206

15.54 0.04 0.46 3.328

15.55 0.05 0.55 6.202

15.55 0.05 0.61 9.197

15.53 0.03 0.38 12.195

15.54 0.04 0.53 15.188

15.54 0.04 0.52 18.185

15.55 0.05 0.55 21.178

Weld Elevation----> 107.93

Height

Above

Chime

Diameter

Deviation (in)

Subject: Shell Radius Survey Page 3 of 3

Distance

From Radial

Centerline Deviation Deviation (in)

West 15.50 0.00 0.00 0.2

15.52 0.02 0.25 3.205

15.52 0.02 0.25 6.202

15.51 0.01 0.10 9.199

15.49 -0.01 -0.11 12.203

15.48 -0.02 -0.25 15.209

15.50 0.00 0.04 18.198

15.52 0.02 0.18 21.176

Weld Elevation----> 107.92

Southwest 15.46 -0.04 -0.49 0.193

15.48 -0.02 -0.19 3.199

15.49 -0.01 -0.17 6.2

15.49 -0.01 -0.08 9.2

15.49 -0.02 -0.18 12.202

15.47 -0.03 -0.35 15.207

15.48 -0.03 -0.30 18.209

15.46 -0.04 -0.52 21.221

Weld Elevation----> 107.95

Height

Above

Chime

SHELL SETTLEMENT SURVEY

Austin Brockenbrough & Associates, L.L.P.

Job No. 16-095.04 Location: Fort Lewis

Date: 04/28/2017 Subject: Tank Facility 09650 Shell Settlement Calcs By: Jeffrey W. King

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

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

Diameter (D) = 31 (ft)

Number of equally spaced data points (ft)= 8 L = Arc length between measurement points (ft) = 12.17 Tank Height (H) = 22 (ft)

Survey Height of

Position Weld * Z U S 0 5 107.91 0.00 0.01 0.01 0.02 1 6 107.93 0.02 0.01 -0.01 -0.02 2 7 107.92 0.01 0.02 0.01 0.02 3 8 107.95 0.04 0.04 0.00 -0.01 4 1 107.95 0.04 0.04 0.00 0.00 5 2 107.94 0.03 0.04 0.01 0.01 6 3 107.94 0.03 0.02 -0.01 0.00 7 4 107.94 0.03 0.01 -0.02 -0.02 8 5 107.91 0.00 0.01 0.01 0.01

Maximum out-of-plane deflection = 0.02

* = 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 = Young’s modulus of elasticity (lbf/in2) = 29000000.00 S allowable (in) (API 653 B.3.2.1) = (L^2*Y*11)/(2EH)*12 = 0.46 in

R^2 =(Syy - SSE)/Syy = 0.61 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.

Job No. 16-095.04 Location: Fort Lewis

Date: 04/28/2017 Subject: Tank Facility 09650 Shell Settlement Calcs By: Jeffrey W. King

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 24.3 0.025 0.37 Si < Smax → OK

2 24.3 0.020 0.37 Si < Smax → OK

5 24.3 0.005 0.37 Si < Smax → OK

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

0.00

0.01

0.02

0.03

0.04

0.05

0 2 4 6 8 10

Measured Elevation (in)

Si2 Si5 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. 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.: 16-095.04

Job Title: Fort Lewis

Subject: Tank 1 (Fac 09650) Shell Thickness Evaluation

By: Jeffrey W. King Date:

API 653

SHELL CALCULATIONS

Diameter 31 feet

Shell Height 22.00 feet

Freeboard 0 feet

Design Fill Height 22.00 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

23,600 26,000

Height Product Required Thickness

Course (feet) Depth 1/4" min

3 6.00 6.00

2 8.00 14.00

1 8.00 22.00 min 2016 Corrosion Estimated UTM current net 1954 Rate Service Life Inspection

Course UTM thickness thickness * in/yr yrs. Interval

3 0.189 0.189 0.190 0.00001 >30 15

2 0.198 0.198 0.202 0.00006 >30 15

1 0.187 0.187 0.218 0.00050 >30 15

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

5/2/2017

Visual

Inspection

Interval

0.100

0.100

0.100

2.6(H-1)D

Hydro

2250020000

Design

Allowable Stress (psi)

API-653API-650

OriginalOriginal

0.089

0.021

0.055

0.020

0.084

2.6(H-1)DG

0.052

SE

2.6HDG

SESE

SHELL/ROOF ULTRASONIC THICKNESS MEASUREMENTS

Brockenbrough personnel recorded the ultrasonic thickness measurements, shown on the following page, on 28

February 2016. 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.: 16-095.04

Job Title: Fort Lewis

Subject: Tank 1 (Fac 09650) Shell and Roof UTMs

By: Jeffrey W. King Date: 5/2/2017

SHELL UTM DATA (0.001 inches)

DFT = 0.000 inches

Course 3 190 190 189 at Stairs

Course 2 203 204 198 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

1-1 189 193 189 189 195 189 187 191 188

1-2 193 200 193 193 195 189 189 192 187

1-3 195 195 192 196 199 196 198 201 196

1-4 197 199 194 197 198 195 195 195 190

Roof 314 314 313 315 316 322 315 315 314

UTs 314 317 315

TANK DRAWINGS

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

Environmental Technology, Inc. in October, 2006. This data is included as a reference and should be used for informational purposes only.

Remarks/Legend:

Owner/Operator:

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

U.S. Army, Ft. Lewis, Tacoma, WA

Environmental Technology, Inc.

10/31/06 N/A N/A

Tank #1 S-1Shell Layout

Seam #1 is the first seam left of the first manway left of the ladder in the first shell course viewing from the outside.

The number in the upper left corner of each plate identifies the plate by the course and position of the plate in that course.

10540

GRAPHIC SCALE:

Dimensions are in feet.

1-1

A

B

C

D

ATG

2-1

3-1

1-2

E

F

2-2

3-2

1 2 3

A - 4" Firefighting Foam Line B - 24" Manway C - 1" Low Level Indicator D - 1" Low Low Level Indicator E - 1" Plug F - 1" Plug

Client:

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

Environmental Technology, Inc.

10/31/06 N/A N/A

Tank #1 S-2Shell Layout

Seam #1 is the first seam left of the first manway left of the ladder in the first shell course viewing from the outside.

The number in the upper left corner of each plate identifies the plate by the course and position of the plate in that course.

10540

GRAPHIC SCALE:

Dimensions are in feet.

1-3

G

H

I

J

K

L

M

N O P

2-3

3-3

1-4

Q R

S T

2-4

3-4

3 4 1

G - 1" High High Level Alarm H - 1" High Level Alarm I - 4" Firefighting Foam Line J - 24" Manway K - 3/4" Pressure Relief L - 1" High Float Control M - 1" Low Float Control N - 4" Product Reciept O - 1" Plug P - 1" Temprature Probe Q - 1" Water Draw R - 3/4" Pressure Relief S - 4" Product Issue T - 3" Crossover/Low Point Suction

Owner/Operator:

U.S. Army, Ft. Lewis, Tacoma, WA

Client:

Inspection Firm:

Date: Revision Number: Revision Date:

Drawing Title: Tank Description: Drawing Number:

Environmental Technology, Inc.

10/31/06 N/A N/A

Tank #1 R-1Fixed Roof Layout

Measured Diameter is 33.4 feet.

Layout Diameter is 31 feet.

Fixed roof has 14 plates.

10543210

GRAPHIC SCALE:

Dimensions are in feet.

y x NW y x

NE

y x

SEy x

SW

XY Orientation

XY Orientation is in reference to Plan North

2 3

6 7

8 9

11 12 13 14

A

B

C

D E F

G

A - 36" Manway B - 4" Vent C - 8" Electronic Level Indicator D - 1" ATG Float Guide Wire E - 1-1/2" ATG Float F - 1" ATG Float Guide Wire G - 24" Emergency Vent

Client:

Austin Brockenbrough & Associates, L.L.P.

Owner/Operator:

U.S. Army, Ft. Lewis, Tacoma, WA

OSHA ACCESS STRUCTURE REPORT

OSHA Stairway Data

Handrail Actual

(in)

OSHA Rq’d min (in) max (in)

Handrail Height 34 34 30 34 Step Width 24 24 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

31'-0" diameter by 22'-0" tall

Type: Type:

Size: Date Installed:

SS End Conn: Size: 4" Material: SS End Conn: Size: 4"

Issue To:Receipt From: Truck Off-Load

Interior Coating:

Double Bottom

Unknown

Unknown

Concrete Dike

120'-0" X 54'-0" X 4'-0"

Level Alarms:

Material:

Tank Outside Dimensions:

Nominal Capacity:

Secondary Containment, Overfill, and CRDM

Open Type Dike

Unknown

Jeffrey W. King

Vertical

Rectangular

Double Wall

Fire Resistant

Closed Top Dike

Change of Service:

Last Repair:

Tank Coatings:

Exterior Coating:

Epoxy/Epoxy/Polyurethane

Epoxy (assumed)

Tank Facility No.:

Local Tank ID No.:

February 28, 2017

Facility 09650

Tank Manufacturer:

Tank Construction Date:

Tank 1

API 653 EXTERNAL INSPECTION CHECKLIST

Fort Lewis, WAProject Site:Project Name:

Project Location:

Brockenbrough Job No.:

SPCC Mandated AST Inspections - Group 19

Various Locations

General Inspection Information

16-095.04

Submitted to:

Contract No.:

USACE - Omaha

W9128F-12-D-0006

Flanged

Truck Fillstand

Unknown

Inspector Certification Number:

Overfill Protection:

NA

NA

NA

Useable Capacity:

Tank Construction and Configuration

Insulated

Coated

Plastic / Fiberglass

Other:

Jet Fuel (F-24)

3,000 BBL

Unknown

Flanged

54102

Horizontal Single Wall

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

October 2006

Tank Specifications

Previous Tank Inspection Date:

Continuous Release Detection Monitoring

Type:

Date Installed:

Current Product: N/A

Inspection Date:

Design Std

Tank Inspector Name:

API 653 EXTERNAL INSPECTION CHECKLIST

Fort Lewis, WAProject Site:Project Name: SPCC Mandated AST Inspections - Group 19

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 0 volts; 0.8 amps

Organic plant debris (leaves) found in the dike area.

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

Piping headers are located over dike low points. Water tends to collect underneath the piping.

a)

C.1.1.2 Asphalt 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

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

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

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

STATUS COMMENTS

e)

C.1.1.4 Rock

Review cathodic protection potential readings

Check for:

c)

TASK

Check for:

Tank Settlement

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

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

Minor corrosion around the tank chime, manhole covers and bolts, etc.

Joint sealant is applied on top of the tank bottom extension.

Bottom-to-foundation seal has systematically failed.

C.1.2. Shells

Check for:

C.1.2.2 Internal (Floating Roof

Tank)

Pitting on support welds to shell, especially on shell plates 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

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

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)

C.1.2.4 Wind Girder (Floating Roof

Tanks) a)

Rivet and seam leaks on external surface

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

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

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

b) Damage on autogauge head a)

Check for:

d)

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

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

Flange leaks and leaks around bolting

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

Check for:

ITEM TASK

a) Leaks at piping manifolds, flanges, and valves

Thermal relief piping is threaded in a few places.

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.

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)

ITEM TASK STATUS COMMENTS

a) b)

Proper mounting flange and support

Leakage 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

C.1.3.3 Autogauge System c) d)

C.1.3.4 Shell-mounted Sample

Station a)

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

Freedom of movement of marker and float i)

Varec = 2'-8 3/4" ,ATG= 2'-8 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

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

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

TASK

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

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

COMMENTS

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

Pass Fail N/A

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.