Attachment J.4 - Facility 204 (Tank 4) Report 2015.pdf

ACOE CONTRACT W911KB-10-D-0006, DELIVERY ORDER 0025

TANK 4 (FACILITY 204)

STI SP001 FORMAL EXTERNAL

INSPECTION AND FINDINGS

FINAL INSPECTION REPORT

King Salmon Air Station, AK

July 2015

Inspection Date April 2015

Contract Agency:

U.S. Army Engineer District, Alaska P.O. Box 6898 Elmendorf AFB AK 99506-6898

Prepared By:

2525 Gambell Street, Suite 200, Anchorage, AK 99503

Michael B. Morris, P.E. Mechanical Engineer, API 653 No. 56148 Shaun C. Wilson Mechanical Engineer / Tank Technician

Submitted By:

Kelly Waring, P.E.

Principal API 653 No. 21992, STI No. AC 12809

EEI Project 8116

Page Intentionally Left Blank

ABSTRACT

Enterprise Engineering, Inc. has completed a Formal External Inspection of Tank 4 at King Salmon Air Station (AS), Alaska. The tank is a shop fabricated (UL 142) self-contained horizontal aboveground storage tank (AST) consisting of a cylindrical primary tank and a rectangular secondary tank supported by two structural steel skids. The inspection was performed in accordance with Steel Tank Institute SP001, 5th Edition, dated September 2011. STI outlines the minimum requirements for a Formal External Inspection based on the spill control configuration, visual Continuous Release Detection Method and the size of tank. Additionally, recommendations are provided for compliance with UL 142 requirements and fire code requirements (National Fire Protection Association) as applicable to shop fabricated aboveground storage tanks. The inspection was performed on April 22-23, 2015.

This report provides inspection findings, conclusions, and recommendations as required under the referenced standard. Recommendations for continued long-term service are also provided.

EEI recommends the next STI SP001, 5th Edition Formal External Inspection be scheduled no later than April 2025, or sooner, if a change in condition has occurred.

In accordance with STI SP001, 5th Edition, this report satisfies the requirement for an STI Inspection and should remain available as a historical record for future reference. All monthly and annual inspection checklists for each tank must be kept on site for 36 months.

I hereby acknowledge that being familiar with the provisions of STI SP001, 5th Edition, the inspection and evaluation was performed in accordance with the provisions of STI SP001, 5th

Edition and good engineering practices, and with the exercise of usual and customary care.

Kelly B. Waring Date STI No. AC 12809

This tank inspection has determined that one mandatory repair is required. However, the repair does not affect the integrity of the tank. Tank 4 is suitable to remain in service.

Tank 4 – STI Inspection TABLE OF CONTENTS King Salmon Air Station, AK July 2015 EEI Project No. 8116

TABLE OF CONTENTS

Page

SUMMARY

Scope General

SUITABILITY FOR SERVICE

INSPECTION AND EVALUATION

Tank Openings Hydraulic Integrity Structural Integrity Next Inspection

REPAIR ITEMS

Required Repairs (Mandatory) Recommended Repairs (Non-Mandatory) Recommended Repairs for Long Term Serviceability Assessment for Compliance with Current Military Criteria

COATING REQUIREMENTS

Coating System at Localized Repairs (Exterior)

CLOSURE

Conclusions Project Team

APPENDICES

DLA-E Tank Condition Form ............................................................................ Appendix A STI Inspection Tables ........................................................................................ Appendix B Tank Photographs .............................................................................................. Appendix C NDE Results ...................................................................................................... Appendix D Tank Drawing .................................................................................................... Appendix E Calculations ....................................................................................................... Appendix F Monthly and Annual Inspection Checklist......................................................... Appendix G

Tank 4– STI Inspection Page 1

EEI Project No. 8116

TANK 4

STI SP001 FORMAL EXTERNAL TANK INSPECTION

KING SALMON AIR STATION, AK

SUMMARY

Scope

Enterprise Engineering, Inc. (EEI) has completed a Formal External Inspection of Tank 4 at King Salmon Air Station (AS), Alaska. The inspection was performed in accordance with the Steel Tank Institute (STI) STI SP001, 5th Edition, dated September 2011. STI determines the extent of the inspection based on the size of the tank and whether or not the tank has continuous release detection method (CRDM). CRDM includes secondary containment aboveground storage tanks (AST) such as self-diked AST or an elevated AST with release prevention barrier. The inspection was performed April 22-23, 2015.

The scope of this project is to determine the general integrity and condition of the tank, determine suitability for service, provide written recommendations for repairs and develop recommendations for long-term service based on visual inspection and non-destructive examination (NDE).

General

Tank 4 is a shop fabricated, self-contained, horizontal, aboveground storage tank (AST) consisting of a cylindrical primary tank and a rectangular secondary tank supported by two structural steel skids. The primary tank dimensions are 11’-0” dia. by 42’-4 ½” long and the secondary tank dimensions are 47’-10 3/4” long by 12’-10” wide by 7’-2” high. The tank is in DS-1 service and has a nominal capacity of 30,000 gallons. The tank was installed in 1992. The steel skids sit on a concrete pad within a fenced secure area. Fuel is received by commercial tanker trucks and issued to dispensers.

A secondary containment AST is defined as an AST with an integral secondary containment that is designed to contain the contents of the primary tank if it fails. Since this tank is a single wall AST within a steel secondary containment, it is considered to have a release prevention barrier and is classified as a Category 1 Tank (STI SP001, Table 5.4). The tank has a 30,000 gallon capacity, thus requiring Periodic Inspection and a Formal External Inspection per STI SP001, Table 5.5 to determine tank suitability for continued service.

The findings from the STI criteria for a Formal External Inspection and by reference National Fire Protection Association (NFPA) 30 are presented.

Facility Summary

The facility includes several atypical items from traditional gas stations:

The facility exceeds the capacity that can be stored in each individual tank as well as the overall aggregate capacity for a facility that issues fuel directly to vehicle dispensers.

The piping system to the dispensers is double wall carbon steel without a cathodic protection system or a working interstice monitoring system.

The sumps below the dispensers do not include a bottom or leak detection sensor.

Tank 4– STI Inspection Page 2

EEI Project No. 8116

There are three different control/monitoring systems (Veeder-Root TLS 350 ATG, PermAlert interstice monitoring, and Emco Wheaton leak detection), only one of which is actively in use (the Veeder-Root).

EEI believes the best strategy to remedy the aforementioned deficiencies is for the facility to execute a modernization project. The modernization project would bring the facility up to the current standards and codes. The alternative to a modernization project is to address individual deficiency items that will resolve tank hydraulic and structurally integrity issues. These repairs will not address the fact that the configuration of the facility does not meet the fire code in relation to the size of the tanks.

The specific repair recommendations and their code requirements justifications are listed in the “Overall Assessment and Repair Execution Strategy” section below. In addition, the recommended scope for a modernization project is included

SUITABILITY FOR SERVICE

The Formal External Inspection did not identify any items that would require additional inspections or evaluations. All of the metal thicknesses measured fall within mill tolerances. The calculation for a corrosion rate is not possible without UT thickness less than original metal thickness. Based on the definitions within STI SP001, Tank 4 is suitable for continued service.

INSPECTION AND EVALUATION

The Appendices in this report contain tables with full reporting of data taken, non destructive examination results, drawings, and photographs. Appendix B contains an STI Inspection Table. The discussions that follow address only key integrity issues.

Tank Openings

The nozzles on Tank 4 are as follows:

Tank Connection/Opening Summary

Tank 4 Connection Comment

Primary Tank

Fill Connection 3‐inch receipt line in 4‐inch threaded bung. Fill line equipped with high level valve.

Issue Connection 4‐inch threaded bung with red jacket pump

Nozzle for inventory control 4‐inch threaded bung for manual gauge (stick gauging port) 4‐inch threaded bung for Veeder Root TLS 350 system (primary ATG)

Manway Two 36‐inch manways on top of the tank

Normal Vent 4‐inch pressure/vacuum vent

Emergency Vent 18‐inch emergency vent (long bolt with spring style)

Drain/Water Draw 4‐inch nozzle on top of the tank reduced to 1‐inch piping with cap

Miscellaneous

4‐inch threaded bung with pilot tubing for high level valve (HLV) float 4‐inch threaded bung for Emco Wheaton EECO 2000 system for leak detection(1)

Submersible turbine transfer pump (3‐inch piping; installed in 6‐inch bung).

Tank 4– STI Inspection Page 3

EEI Project No. 8116

Tank Connection/Opening Summary

Tank 4 Connection Comment

Secondary Tank

Manway One 30‐inch manway on the secondary containment on the East head.

Emergency Vent 18‐inch emergency vent (long bolt with spring style)

Miscellaneous One 2‐inch threaded bung for interstitial monitoring One 2‐inch with threaded plug

Note (1): The EECO 2000 system was discontinued in 2013.

Hydraulic Integrity

Hydraulic integrity is the ability of the tank to hold product without compromise to the boundaries of the shell and heads.

No leaks were observed on the tank structure or in the containment area. Based on this inspection, Tank 4 is in acceptable hydraulic condition.

Structural Integrity

Structural integrity is the capability of the tank to remain sound, with or without product, under the conditions of its design basis. Structural components include the primary tank and appurtenances.

Ultrasonic thickness (UT) measurements were taken of the tank exterior. All of the metal thicknesses measured fall within mill tolerances. The UT results are documented in Appendix D. Based on this inspection, Tank 4 is in acceptable structural condition.

Next Inspection

For a Category 1 tank with a capacity of 30,000 gallons, STI SP001 inspections are required as follows:

Monthly Inspection: This is a visual inspection and a checklist has been provided in the appendices.

Annual Inspection: This is also a visual inspection and a checklist has been provided in the appendices.

Periodic Inspection: A Periodic Inspection must be done by the owner or owner’s inspector. This person must be familiar with STI SP001 and follow the stated procedures. The interval for a Periodic Inspection is not defined; however, we recommend every 5 years. Schedule the next Periodic Inspection no later than April 2020.

Formal External Inspection: A Formal External Inspection is required every 20 years per STI SP001.

However, EEI recommends every 10 years for consistency with DLA-E policy and funding practices.

Schedule the next Formal External Inspection no later than April 2025.

Internal Inspection: An internal inspection is not required by STI SP001.

Inspection Interval Discussion: STI represents minimum standards by which an inspection should be conducted. SP001 assumes that a level of ongoing owner inspection (Monthly and Annual Checklists) by a qualified person will be performed. STI’s interval is based on a commitment by the owner to perform the required inspections and maintain the paperwork. EEI feels that 20 years between formal inspections is excessive and too infrequent to identify and repair any deficiencies that may occur. Therefore, EEI recommends a formal external inspection every 10 years to identify deficiencies so that they can be corrected before they impact the integrity of the tank.

Tank 4– STI Inspection Page 4

EEI Project No. 8116

REPAIR ITEMS

Based upon the STI field inspection, engineering judgment, code requirements, and knowledge of funding practices, recommendations developed are listed below as Required Repairs (Mandatory), Recommended Repairs (Non-Mandatory), and Recommended Repairs for Long Term Serviceability. An assessment for compliance with current military can be found in Appendix B with their resulting deficiencies listed below.

Required Repairs (Mandatory)

Mandatory repairs are repairs that are considered critical to the hydraulic or structural integrity of the tank or are required to meet code for continued service.

1. Tank 4 stores 30,000 gallons of DS-1. DS-1 is classified as a Class II liquid per NFPA 30A. Storing 30,000 gallons of a Class II liquid at a motor fuel dispensing facility is a violation per NFPA 30A §4.3.2.3. NFPA requires tanks storing liquid Class II motor fuels at an individual site be limited to a maximum individual capacity of 20,000 gallons. There are two possible actions at this time.

Action 1: Accept the non-compliant condition as is and make no repairs. It may be necessary to obtain a waiver from the authority having jurisdiction.

Action 2: Cease dispensing of DS-1 via the dispensers to motor vehicles and provide a smaller tank for the direct dispensing to vehicles. The tank may still be used as a bulk tank for issuing to tanker trucks although this would require piping modifications.

Note: This mandatory repair does not affect the structural or hydraulic integrity of the tank.

Recommended Repairs (Non-Mandatory)

The repairs listed below are not mandatory per STI SP001 or for structural and hydraulic integrity of the tank. EEI highly recommends these repairs for long-term preservation and integrity of the tank.

1. Tank 4 is equipped with an interstice leak detection probe connected to the PermAlert system (Pal-AT model). The PermAlert system is reportedly functional however it is not currently in use or receiving regular maintenance. Alaska state regulation 18 AAC 75.066 (d) requires that a self-contained aboveground tank (SCAT) be equipped with an interstice monitoring system.

Recommend confirming functionality and commencing use of the PermAlert system. The PermAlert system should additionally begin receiving regular maintenance. Alternatively the tank interstice sensor could be tied into the Veeder Root system.

2. Coating failure and corrosion was identified on the tank shell and appurtenances on top of the tank.

Recommend providing surface preparation and recoating the affected areas (approximately 10 square feet total).

3. The tank is not equipped with audible or visual high level alarms at the truck offload point or at the tank. Alaska regulation 18 AAC 75 states that high level alarms shall signal and display in a manner immediately recognizable by personnel conducting a transfer.

Recommend providing audible and visual level alarms at the truck offload point.

4. The issue line is equipped with a 2-inch bronze anti-siphon solenoid globe valve on top of the tank.

Bronze valves are a UFC 3-460-01 code violation.

Recommend removing the bronze valve and providing a carbon or stainless steel valve.

Tank 4– STI Inspection Page 5

EEI Project No. 8116

5. The tank is equipped with a 4-inch pressure/vacuum vent.

Recommend disassembling and cleaning the pallets.

6. The tank is not equipped with the appropriate fire hazard label.

Recommend installing a hazardous label placard. The information shall be presented by a spatial arrangement of numerical ratings, with the health rating always at the nine o'clock position, the flammability rating always at the twelve o'clock position, and the instability rating always at the three o'clock position.

Recommended Repairs for Long Term Serviceability

1. Perform all monthly and annual inspections per STI SP001. The forms are included in the appendices.

2. Schedule the next Periodic Inspection for no later than April 2020.

3. Schedule the next Formal External Inspection for no later than April 2025.

4. Test the level alarms and ATG system as part of ongoing maintenance.

5. Test the HLV as part of routine maintenance.

6. Periodically inspect the rain cap on the pressure/vacuum vent for debris and remove the cap, clean the screen and verify that the valve is clear of any debris.

7. Periodically remove water from the tank.

Miscellaneous Additional Deficiencies (Non-Tank)

The following recommendations relate to the piping and dispensing associated with Tank 4

1. The tank receipt piping from the truck offload to the tanks and the tank issue piping from the tanks to the dispensers is a buried steel double wall piping system (steel carrier pipe and steel casing pipe).

The piping interstice is equipped with a leak detection probe connected to the PermAlert System, however, it is not currently in use. The configuration of the double wall piping system is such that visual observation of the interstice is not possible. Alaska Underground Storage Tank Regulation 18 AAC 78.60 requires release detection for double wall piping connected to tanks (see note below).

Recommend confirming functionality and commencing use of the PermAlert system. The system should additionally begin receiving regular maintenance. Alternatively the interstice leak detection could be tied into the existing Veeder Root system.

Note that the code reference above is for underground storage tanks. Although this facility contains aboveground tanks the piping/dispensing configuration more closely mirrors a UST gas station piping system. Therefore, it is recommended the regulations for underground tank piping be followed.

2. The tank issue piping is underground pressurized piping. Federal (40 CFR §280.41) and State (18 AAC 78.070) underground storage tank regulations (see note below) require that underground pressurized pipe be equipped with a line leak detection system. Building 205 contains an Emco Wheaton (EECO 2000 series) leak detection console. The system was not in use at the time of the inspection.

Recommend confirming functionality and commencing use of the Emco Wheaton system.

Note that the code reference above is for underground storage tanks. Although this facility contains aboveground tanks the piping/dispensing configuration more closely mirrors a UST gas

Tank 4– STI Inspection Page 6

EEI Project No. 8116 station piping system. It is therefore recommended the regulations for underground tank piping be followed.

3. There are two DS-1 dispensers. The sumps below the dispenser are equipped with sheet metal side walls however they are not equipped with a bottom. Impervious spill containment at the bottom of dispensers is required per UFC 3-460-01 §7-6.1.1.

Recommend providing fiberglass or high density polyethylene (HDPE) dispenser sumps with a liquid detection probe.

4. The underground double wall piping system is reportedly not afforded with cathodic protection (the casing pipe is carbon steel). The last CP report was not available for review to confirm this, however the field team could not locate any CP test stations or an impressed current rectifier. UFC 3-460-01 §2-13.2 requires all metallic underground piping to be protected with a CP system.

King Salmon AS receives visits from CP inspectors as part of the CP Centrally Managed Program (CMP). During the next CP survey, it is recommended that CP technicians investigate the underground piping associated with Tanks 1 through 4.

If it is found that there is no CP system, a CP system should be provided. Alternatively the double wall metallic piping could be replaced with a non-metallic double wall piping typical to a UST gas station system.

5. Coating failure and corrosion was identified on the above ground DS-1 receipt and issue piping.

Recommend providing surface preparation and recoating the affected areas (approximately 20 square feet).

6. Organics were observed growing on the concrete pad adjacent to the tank skids.

Recommend pressure washing the concrete pad to remove the organics.

Assessment for Compliance with Current Military Criteria

Table 8-1 of UFC 3-460-01 (November 2013) describes appurtenances for horizontal ASTs. See Appendix B for a full assessment of military criteria. No military criteria deficiencies warranting repair have been identified that have not been previously discussed.

FACILITY MODERNIZATION PROJECT

Individual repairs will not address the fact that the configuration of the facility does not meet the fire code in relation to the size of the tanks. Recommend a project be funded to include the following:

1. Provide two new 5,000 gallon tanks (one Mogas and one diesel) for dispensing to vehicles. The existing tanks (Tanks 1 through 4) would be used as ground fuels bulk storage.

2. Provide the existing Mogas tank with a transfer pump (high flow submersible turbine pump).

3. Provide carbon steel piping (aboveground) for transferring from the bulk tanks to the gas station dispensing tanks.

4. Provide composite double wall underground piping system from the 5,000 gallon tanks to each of the dispensers.

5. Provide sumps below the dispensers. Given the age of the dispensers consideration should be given to replacing the dispensers.

Tank 4– STI Inspection Page 7

EEI Project No. 8116

6. Upgrade the Veeder-Root ATG system to include the monitoring of the piping system and all of the piping/sump interstices. The primary piping of the new underground double wall piping system shall be leak testable. Eliminate the PermAlert and Emco Wheaton monitoring systems.

7. Separate the new issue tanks from the bulk tanks as required by NFPA 30A.

COATING REQUIREMENTS

Coating System at Localized Repairs (Exterior)

Provide repair of localized areas of failed and damaged coating on the exterior of the tank and areas affected by the contractor’s work. Provide surface preparation in accordance with the coating manufacturer’s recommendations to ensure adhesion of the coating system. Observe all requirements for soluble salts contamination, cleanliness between coats, and application conditions. Protect adjacent areas from damage and overspray.

Provide 2-coat epoxy polyamide system with polyurethane topcoat as specified in UFGS Section 09 97 13.27, Exterior Coating of Steel Structures. A commercially available polyurethane coating system or moisture-cured polyurethane coating system may be considered based on the limited quantity of coating repairs. Alternate coating system shall be compatible with the existing coating system.

CLOSURE

Conclusions

Based on the extent of this inspection, Tank 4 is suitable to remain in service. The one mandatory repair must be addressed however it does not affect the structural or hydraulic integrity of the tank.

Project Team

Site Team

Michael B. Morris, P.E. Mechanical Engineer, API 653 No. 56148

Shaun C. Wilson Mechanical Engineer / Tank Technician

Support Team

Stacy M. Kaplan-McMillan Project Manager

Kelly B. Waring, P.E. STI Inspector of Record, Mechanical Engineer, API 653 No.

21992, STI No. AC 12809

APPENDIX A

DLA-E TANK CONDITION FORM

Tank 4 – STI Inspection Appendix A, Tank Summary Sheet King Salmon Air Station, AK EEI Project No. 8116

DLA-E TANK CONDITION FORM

TANK INSPECTION SUMMARY SHEET

Tank Location: King Salmon Air Station, AK Tank No.: 4

Facility No.: 204 Inspection Date(s): April 22-23, 2015

Tank Type: Self-contained Horizontal aboveground storage tank (SCAT) Type of Inspection: Formal External Inspection w/ Suitability for Service

Contract Number, Task Order: W911KB-10-D-0006 Prime Contractor Name: Enterprise Engineering Inc.

Inspector, Certificate #: Kelly B. Waring

STI No. AC 12809 Inspection Company: Enterprise Engineering, Inc.

2525 Gambell Street, Suite 200 Anchorage, AK 99503

(907) 563-3835

Manufacturer, Date, Design Standard: Unknown, 1992, UL 142 Diameter of Primary Tank: 11’-0" length of Primary Tank: 42’-4 1/2" Product, Specific Gravity: Diesel, 0.85

Design Pressure / Temperature: Atmosphere/Unknown Nominal Capacity: 30,000 Gallons

Safe Fill Height: 9’-10” GPS Latitude & Longitude: 58 Deg 41’ 26.52” N, 156 Deg 39’ 45.04” W

(Source – Google Earth) Foundation Configuration: The tank is supported by steel saddles within a steel containment area.

Shell Configuration: Butt welded with 5 courses (rings) Cathodic Protection: None

Still Wells: None Last Inspection (Type, Date): Internal API 653, September 2007

Last Coated Internally (Product): Assume original construction 1992 Last Coated Externally (Product): Assume original construction 1992

INSPECTION RESULTS

Does tank have to be removed from service?:

Deficiencies identified as mandatory repairs:

Deficiencies identified as recommended repairs:

Deficiencies identified as long term repairs:

Next Scheduled Inspections (Type, Date):

No.

Yes.

Yes. (See paragraph titled “Repair Items” in body of report) Yes. (See paragraph titled “Repair Items” in body of report) Formal External Inspection: April 2025 (10 Years from 2015 inspection)

ADDITIONAL ITEMS

Change in Service: No As-Built Drawings, Specifications: No As-Built drawings were available

APPENDIX B

STI INSPECTION TABLES

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 1

EEI Project No. 8116

OWNER INFORMATION INSTALLER INFORMATION

Name King Salmon Air Station

Name Unknown

City, State King Salmon, AK

City, State Unknown

TANK ID: 4 TANK LOCAL NAME: Tank 4

SPECIFICATION:

Design:

UL 142 (Assumed; no nameplate)

API

Unknown

SWRI

Other UL 2085

Horizontal

Vertical

Rectangular

Manufacturer: Isom Brothers Inc. Contents: Diesel (DS 1) Construction Date: 1992 Last Repair/Reconstruction Date: None

Dimensions:

(Inside) DIA: 11’-0” LONG: 42’-4 1/2” Capacity: 30,000 gallons Last Change of Service Date: Unknown

Construction:

Bare Steel Coated Steel Double Bottom

Cathodically Protected Concrete Double Wall

Check One:

Galvanic Impressed Current Not Applicable

Note: Tank coating is in acceptable condition with minor areas of coating failure and corrosion.

Containment: Earthen Dike Steel Dike Concrete Synthetic Liner Other : Double-wall

Note: The tank is self-contained horizontal aboveground tank.

Continuous Release Detection Method (CRDM): Date Installed: 1992 Type: Visual (3-inch nozzle w/ cap) and Electronic(1)

Release Prevention Barrier: Date Installed: 1992 Type: Steel containment

Additional Notes: (1) Note the electronic interstice monitor is not in use. Refer to main body for recommendation.

General Note: This STI inspection was an external inspection only. EEI performed an internal inspection in 2007; refer to that document for information relating to internal components.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 2

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

1.0 CONTAINMENT

Containment installation condition X

The steel containment was in acceptable condition.

The capacity of the steel containment is enough to contain the entire contents of the tank. The Containment area is a closed top type therefore UFC §8-14.2.1 has been met.

UFC §8-14.2.1 states that containment must be able to store the entire contents of the tank plus the greater of a 24-hour, 25-year storm or one foot over the entire area of drainage or the flow of the water from firefighting activities.

Drainage valve operable, condition X The containment is not equipped with a drain valve.

Drain valve is not required; if any liquid is found in the interstice it can be removed by use of a vacuum truck or small pump.

Water able to drain away from tank X The tank is mounted on steel saddles. Water is able to drain away from the tank.

Any organics, debris, or liquids in containment area X Organics were observed growing on the concrete pad adjacent to the tank skids.

Recommend pressure washing the concrete pad to remove the organics.

Containment wall penetrations, breach X Three 2 inch threaded bungs, one 18 inch emergency vent and one 30 inch manway.

Steel condition X The steel is in acceptable condition.

2.0 SECONDARY CONTAINMENT

Secondary containment (interstitial space) X A 3-inch cap was removed and no liquid or debris was observed within the interstice.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 3

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

CRDM X

Visual through 3-inch threaded nozzle with cap.

Electronic through 2 inch threaded bung with PermAlert System monitoring system.

Facility personnel reported that the electronic system is not in use.

Recommend confirming the functionality of the system and initiating use of the system.

3.0 TANK FOUNDATIONS AND SUPPORTS

Evidence of tank settlement or foundation washout

X No tank settlement or foundation washout was observed.

Tank supports condition X The secondary containment steel skid supports are in acceptable condition. Minor coating failure and corrosion was observed where the base of the steel skids where they are in contact with the concrete pad.

Recommend providing surface preparation and recoating the affected areas.

Tank supports welded or padded X The steel skids for the secondary containment are welded.

Risk of corrosion under support X There is risk of corrosion between the steel skids and the secondary containment.

There is no risk of corrosion between the tank and the steel saddles within the steel containment.

Supports fully or stitched welded X The tank is stitch welded to the steel saddles.

The steel skids are stitch welded to the steel containment.

Concrete Supports N/A

Piers N/A

4.0 CATHODIC PROTECTION

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 4

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

CP system functional N/A

Rectifier reading N/A

5.0 TANK COATINGS

Evidence of external coating failure X Moderate coating and corrosion was observed on the tank nozzles and appurtenances.

Recommend providing surface preparation and recoating the affected areas to prevent further degradation.

Inspect external welds, corrosion?

X

The external welds were in acceptable condition. Minor scattered coating failures were observed on the welds of the secondary containment area.

Recommend providing surface preparation and recoating the affected area to prevent further degradation.

Interior welds and corrosions N/A Unknown, an internal inspection was not performed.

6.0 TANK SHELL/HEADS

Noticeable shell/head distortions, buckling, denting or bulging

X None observed

Evidence of shell/head corrosion or cracking

X None observed

Shell Attachments/Repairs X None observed

7.0 TANK APPURTENANCES AND FITTINGS

7.1 TANK MANWAYS

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 5

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

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

X The bolts on all of the flanged connections were fully engaged and tight with signs of coating failure and minor corrosion.

Recommend providing surface preparation and recoating the affected areas to prevent further degradation.

Size of Manway X

Two 36-inch on the primary tank.

One 30-inch on the steel containment.

Number of Manways X There are three manways.

7.2 VENTING

Vents free of obstructions X The pressure/vacuum vent was free of obstructions

Size of normal vents (primary & secondary)

X The primary tank is equipped with a 4-inch pressure/vacuum vent.

Recommend disassembling and cleaning the pressure/vacuum vent.

Pressure/vacuum vents X The tank is equipped with a pressure/vacuum vent. Recommend that facility personnel periodically inspect the rain cap for any debris and remove the cap, clean the screen and verify that the valve is clear of any debris per manufacturer’s instructions as part of routine maintenance.

Emergency vent operable. Lift as required

X The vent operates and lifts as required.

Size of Emergency vent X 18-inch nozzle with cover that has been equipped with long bolts and springs.

Are emergency vent(s) properly sized X The vent is adequately sized

7.3 OTHER APPURTENANCES

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 6

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

Tank Fill Connection (Is there a Spill Prevention Device) X

The tank is equipped with a 4-inch threaded bung for the 3-inch fill line. There is a hydraulically actuated high level valve (Cla-Val).

From the previous report (2007 out-of-service internal and external inspection) the 3-inch fill nozzle is equipped with a drop tube. This could not be verified as part of the current inspection.

Tank Issue Connection X The tank is equipped with a 4-inch nozzle with a red jacket submersible turbine pump for issuing to dispensers.

Manual Fill Connection (Check for Drop Tube)

X The tank is not equipped with a manual fill connection.

Additional tank top openings, size and closure style X

4-Inch for TLS 350 system 4-Inch for Emco Wheaton system 4-Inch for HLV float 4-Inch for manual gauging 3-Inch reduced to 1-inch with cap for water draw off

Does tank have bottom drain X The tank is not equipped with a bottom drain.

8.0 LEVEL AND OVERFILL PREVENTION INSTRUMENTATION

Manual gauging system type and condition

X

The tank is equipped with a nozzle for manually (stick) gauging the tank.

From the previous inspection (2007 out-of-service internal and external inspection) there is a 2-1/2-inch un-slotted gauge tube that extends to the bottom of the tank. This could not be verified as part of the current inspection.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 7

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

Has the tank liquid level sensing device been tested to ensure proper operation (secondary containment interstitial space and sumps in dispensers) X

Per facility personnel the liquid level sensing device is tested on an annual basis.

Per facility personnel the interstitial space monitoring system is not in use. The dispensers did not have sumps or an interstitial space monitor.

See main body for recommendations.

Are overfill prevention devices in proper working condition

X

The tank is equipped with a 3-inch high level control valve.

The tank is equipped with a 4-inch nozzle with a cap that has connections for the high level float tubing.

The high level valve was not tested as part of this inspection.

Level gauge X The tank is equipped with a Veeder Root ATG monitoring system.

High/Low level alarms

X

The tank is equipped with a Veeder Root TLS 350 system with a control panel at a centralized location near the tank. An AFHE and SCADA system is tied into the Veeder Root system for display in the control room. The level alarm heights are as follows:

Hi-hi: 125-3/8” Hi: 118-13/16” Low: 13-3/16” Low-low: 6-5/8”

9.0 ELECTRICAL EQUIPMENT

Are tank grounding lines in good condition X

There are two grounding lines attached to the steel secondary containment. The grounding lines were in good condition.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 8

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

Grounding strap secured and in good condition X The ground straps on the west and east ends of the tank containment were in acceptable condition.

10.0 NAME PLATES

Tank name plate X The tank is not equipped with a name plate.

All other name plates X No other name plates observed.

11.0 PIPING

Pipe Alignment X The piping is properly aligned.

Minor coating failure and corrosion was identified on the piping. Recommend providing surface preparation and recoating the affected areas.

Materials X All piping is constructed of carbon steel.

Fittings X The fittings are a mixture of welded and flanged.

Valves X Double block and bleed and ball valves are utilized for piping isolation. The valves appeared to be in serviceable condition.

Thermal Relief Valves (Set Pressure) X The tank is not equipped with any thermal relief valves.

Anti-Siphon Valve X The tank is equipped with a solenoid operated valve on the issue line for anti-siphon.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 9

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

Solenoid Valve X The tank is equipped with a bronze solenoid valve.

Per NFPA the use of bronze and brass components are prohibited in fueling systems.

Recommend that the bronze solenoid valve be removed and a carbon or stainless steel valve be provided.

Issue/Receipt Methods X The tank receives fuel from re-fueler trucks and issues to ground fuel dispensers for fleet vehicles.

12.0 STAIRS & PLATFORMS

Hand rails X The handrails were in acceptable condition. Minor coating failures and surface corrosion was observed on the angle iron supporting the grating.

Recommend that the affected areas be cleaned and recoated to prevent further degradation.

Stairs & Stringers X No stairs. The tank is equipped with two ladders.

13.0 PHOTO DOCUMENTARY X See Appendix C

14.0 TANK FABRICATION (UL 142 VS

UL 2085) X The tank is not equipped with a name plate. Historical photos show that the tank previously had a nameplate indicating it was constructed to UL 142 standards.

14.1 TANK LABELING

Emergency Venting X The tank name plate was missing.

Hazardous Tank Label X The tank is not equipped with the appropriate hazardous labels. Recommend providing a hazardous label placard.

15.0 UFC 3-460-01 COMPLIANCE

This section describes appurtenances for horizontal aboveground storage tanks as required by military criteria. The requirements come from Table 8-1.

Item (a) specifies two 36-inch manways for tanks with a capacity in excess of 5,000 gallons.

X The tank is equipped with two 36-inch manways. No action required.

Item (i) is an internal ladder for tanks with a capacity in excess of 5,000 gallons.

X From the 2007 internal inspection both of the manways are equipped with ladders.

Item (j) is an exterior ladder and platform with safety railing for gauging and sampling.

X The tank is equipped with an exterior ladder and platform for accessing the nozzles on top of the tank.

Recommend providing surface preparation and recoating the affected areas to prevent further degradation.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 10

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

Item (l) is a combined automatic level alarm and automatic tank gauging system for tanks less than 30,000 gallons.

X The tank is equipped with a Veeder-Root ATG system.

The Veeder-Root system also controls the tank level alarms. A SCADA and AFHE system is also wired through the Veeder Root system to display tank information in the control room.

Item (m) is an open atmospheric vent with weather hoods and bird screens or a pressure/vacuum vent.

X The tank is equipped with a 4-inch pressure vacuum vent with a weather hood.

Item (n) is an emergency relief vent with a capacity in accordance with NFPA and

UL 142.

X The tank is equipped with an 18-inch emergency vent that is adequately sized.

Item (o) is a liquid level gauge calibrated in 1/16-inch graduations mounted at 60-inches above the walking surface.

X The tank is not equipped with a tape gauge or clock gauge.

EEI considers this a discretionary item for government determination. The adjacent building (Building 205) contains the TLS 350 console which has a level read out.

The tank is additionally equipped with a stick gauging port.

Item (p) is an ATG system for all tanks with fuel managed through the Defense Logistics Agency’s Business Modernization (BSM Enterprise Resource Program (ERP) – Fuels section).

X The tank is equipped with a Veeder-Root ATG system that also controls the level alarms.

Item (q) is a 4 inch gauge hatch with drop tube to within 3 inches of the bottom of the tank and a second 4 inch opening without a drop tube or gauge hatch.

X The tank is equipped with one 4-inch gauging nozzle.

From the 2007 internal inspection there is a drop tube in the tank.

Adding a second gauging hatch would only be minimally beneficial to operations; no repair recommended.

Item (x) is a hydraulically operated diaphragm control valve for overfill protection.

X The tank is equipped with a hydraulically operated diaphragm control valve for overfill protection.

Item (z), water draw-off, is a 2-inch double block and bleed, plug valve with internal poppet at the low end of the tank, unless tank contains aviation turbine fuels with icing inhibitors. In those cases, the water draw-off valve may be a ball valve.

X The tank is equipped with a 1-inch piping connection on top of the tank with a threaded cap for water removal.

Item (ee) is a ball joint on pipes to relieve strain caused by tank settling or seismic activity.

X The tank is not equipped with a ball joint. Tank settling is not an issue and the piping was aligned.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 11

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

Item (gg) is striker plates under all openings used for manual gauging in steel tanks and all openings in fiberglass tanks.

X From the 2007 internal inspection a non-ferrous striker plate is present below the manual gauge drop tube.

16.0 ADEC COMPLIANCE

16.1 18 AAC 75.066 SHOP-FABRICATED ABOVEGROUND STORAGE TANKS PLACED INTO SERVICE BEFORE DECEMBER 30, 2008

18 AAC 75.066 (d) The owner or operator of a self-diked shop-fabricated aboveground oil storage tank shall ensure that the tank

(1) Has access that allows visual inspection for corrosion-or damage to the

A. Outer shell of the storage tank; and

B. Interior surfaces of the integral secondary containment dike.

X

The tank is equipped with a 30-inch manway on the secondary containment that can be removed to inspect the interstitial space of the secondary containment and the outer shell of the primary tank.

75.066 (d)(2) has, at each tank fill connection, a fixed overfill spill containment system designed to prevent a discharge when a transfer hose or pipe is detached from the tank fill pipe or to divert that discharge into the secondary containment dike.

X

The tank is equipped with a hydraulically operated high level valve. Additionally there is an 8-inch flanged pipe connected to the secondary containment to divert any fuel from an over fill to the secondary containment.

75.066 (d)(3) is equipped with a system for freeing water or spilled fuel from the integral dike and for regular maintenance in accordance with 18 AAC 75.075(c) and (d)

X There is a 3-inch threaded bung in the emergency vent cover that allows for freeing of water or spilled fuel.

75.066 (d)(4) is equipped with an operating interstitial monitoring system that enables an observer from outside the tank to detect oil leaks from the tank bottom and water accumulation within the secondary containment area.

X

2-inch threaded bung with PermAlert monitoring system.

Facility personnel reported that this system is not in use.

Additionally this system is to monitor the underground double piping interstice

Recommend confirming the functionality of the system and commencing use of the system.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 12

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

18 AAC 75.066 (f) The tank shall be inspected in accordance with a recognized standard.

X This inspection (STI SP001) is the industry standard for shop fabricated tanks.

Tank meets 18 AAC 75.066 (g) The tank shall have one or more of the following:

A. Does the tank have high liquid level alarms

B. High liquid level automatic pump shutoff

C. A means of immediately determining the liquid level, if the liquid level is closely monitored during a transfer

D. A system approved by ADEC

X The tank is equipped with level alarms.

18 AAC 75.066 (h) The owner or operator of a shop-fabricated aboveground storage tank shall ensure that each discharge prevention device for the tank is tested before each transfer operation or monthly, whichever is less frequent.

X The tank is equipped with a high level valve and ATG system.

Recommend that facility personnel test the discharge prevention devices before each transfer or monthly whichever is less frequent.

16.2 18 AAC 75.075 SECONDARY CONTAINMENT REQUIREMENTS FOR ABOVEGROUND OIL STORAGE TANKS

18 AAC 75.075 (c) (Are there weekly documented inspections of the secondary containment)

X Facility personnel perform daily inspections of the secondary containment.

18 AAC 75.075 (h) Shop fabricated vaulted, self-contained, or double walled ASTs are not required to be placed within a bermed or lined secondary containment area if they are equipped with catchments that positively hold any fuel overflow due to tank overfill or divert it into a integral containment area and it meets 18 AAC 75.066 (c) for vaulted tanks, (d) for self-contained tanks, or (e) for double wall tanks.

X The tank is equipped with an 8-inch pipe to divert any overfill into the secondary containment.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 13

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

16.3 18 AAC 78 UNDERGROUND STORAGE TANK PIPING(1)

18 AAC 78.060.

Except for a UST used solely to fuel an emergency power generator, the owner or operator of a new or existing UST shall provide a method, or combination of methods, of release detection described at 18 AAC 78.065 and 18 AAC 78.070 that (1) can detect a release from any part of the tank, including the connected underground piping, that routinely contains petroleum

X The underground double wall piping is not equipped with a release detection method. See main body of report for repair recommendation.

18 AAC 78.070.

Pressurized piping must meet the applicable requirements set out either in

(b) and (c) of this section or in (b) and (d) of this section

(b) Automatic line leak detection

(c) Line tightness testing

X The underground issue piping is pressurized piping. The piping is not currently receiving leak or tightness tests. See main body of report for repair recommendation.

Note 1: Note that the code reference above is for underground storage tanks. Although this facility contains aboveground tanks the piping/dispensing configuration more closely mirrors a UST gas station piping system. Therefore, it is recommended the regulations for underground tank piping be followed

17.0 EPA (40 CFR 112) RELATED ITEMS

40 CFR 112.8(c)(2) requires bulk storage tank installations to have a secondary means of containment for the entire capacity of the largest single container and sufficient freeboard to contain precipitation.

x The tank is a closed top dike Self-Contained Aboveground Tank (SCAT).

40 CFR 112.8(c)(6) requires that each aboveground container be tested or inspected on a regular schedule and whenever material repairs are made in accordance with industry standards.

x This STI SP001 inspection is the industry standard for shop fabricated tanks such as Tank 4.

Tank 4 – STI Inspection Appendix B, STI SP001 Inspection Data Sheet, Page 14

EEI Project No. 8116

ITEM DONE FINDINGS COMMENTS/RECOMMENDATIONS

(No response indicated finding is acceptable)

TANK No: 4 Product: Diesel (DS 1) Tank Location: King Salmon Air Station Inspection Date: April 22-23, 2015

40 CFR 112.8(c)(8) requires that storage containers be equipped with one of the following:

a. High level alarm with audible or visual signal;

b. High liquid level pump cutoff device;

c. Direct audible or code signal communication between container gauge and pumping station;

d. Fast response system for determining the liquid level, such as a direct vision gauge, provided that someone is present to monitor the gauge; and

e. Regular tests of liquid level sensing devices to ensure proper operation.

X The tank is equipped with a high level alarm. The alarms are tested annually by SPAWAR. A Veeder Root console in Building 205 is also present to allow for a fast response system for determining the liquid level.

18.0 HISTORY OF TANK X

Tank 4 was internally and externally inspected in September 2007 by EEI. The internal inspection was performed for internal coating condition.

APPENDIX C

TANK PHOTOGRAPHS

Tank 4 – STI Inspection Appendix C, Tank Photographs, Page 1

Overall view of Tank 4

Tank 4 East View. A) Secondary containment manway. B) Tank to tank transfer line.

A

B

Tank 4 – STI Inspection Appendix C, Tank Photographs, Page 2

Tank 4 South West view with the access ladders and platforms.

Tank 4 West view.