Attachment J.4 - Davenport-Fac 30147 (Tank 4)-FINAL-2016.pdf

TANK 30147 (TANK 4) STI SP001

FORMAL EXTERNAL INSPECTION REPORT

Army Air Support Facility Davenport, Iowa

A/E Contract No. W9128F-12-D-0006; Delivery Order No. 0007

Submitted to:

U.S. Army Corps of Engineers Omaha District

1616 Capital Avenue; Omaha, NE 68102

11 May 2016

Submitted by:

1011 Boulder Springs Drive, Suite 200; Richmond, Virginia 23225 Phone: 804.592.3900 Fax: 804.592.3901 www.brockenbrough.com

Job No. 15-002.08

SPCC Mandated Shop-Built AST Inspections AASF Davenport, Tank 30147

Executive Summary page i

EXECUTIVE SUMMARY

Austin Brockenbrough & Associates, LLP (Brockenbrough) was retained by Omaha District USACE under

Contract No. W9128F-12-D-0006 Delivery Order 0007 to perform SPCC Mandated Shop-Built AST

Inspections. As required by this task, Brockenbrough executed a tank inspection site visit to AASF

Davenport near Davenport, Iowa. A formal external inspection per the guidelines of STI SP001

“Standard for the Inspection of Aboveground Storage Tanks” was conducted for Tank Facility No. 30147

(locally identified as Tank 4) on May 20th, 2015. This inspection is in compliance with applicable federal, state, and local codes and regulations, as well as the facilities SPCC Plan.

Tank 30147 is an 8'-4" diameter by 27'-0" long double wall protected horizontal tank with a nominal storage capacity of 10,000 gallons of Jet Fuel (F-24). The tank was fabricated to the UL 2085 “Fireguard”

Tank standard (by unknown manufacturer) in 1999 (per available documentation). Because this tank has spill control and a continuous release detection method, it is classified as a Category ‘1’ Tank.

Details of tank construction and appurtenances are included in Section ‘B’.

The tank was found to be fully serviceable, with no mandatory repair items noted that require immediate attention. A few items were observed that are not in compliance with applicable federal, state, and local codes and regulations. The noted deficiencies are included in more detail in Section ‘C’ and should be addressed in a timely manner.

It is recommended that the tank owner’s inspector perform periodic inspections of this tank using the

STI monthly and annual checklists which are included in Appendix ‘2’ of this report. As this tank is classified as Category ‘1’, STI recommends that the next formal external inspection of this tank occur before July 2035 by a certified STI SP001 inspector. This inspection interval will meet all the applicable requirements for federal, state, and local regulations

Certification Signature:

Bryan Strayer, PE Mechanical Engineer STI Inspector No. AST-990220

Table of Contents page ii

TABLE OF CONTENTS

EXECUTIVE SUMMARY ................................................................................................................................... i

A. General Project Information

1. STI SP001 In-Service Inspections

2. Site Information

3. Previous Inspections

B. Tank Construction and Appurtenances

1. Tank Construction

2. Tank Supports and Foundation

3. Secondary Containment

4. Tank Coating System

5. Tank Appurtenances

a. Venting

b. Gauging

c. Stairs and Platforms

d. Grounding and Bonding

e. Other Appurtenances

6. Tank Piping System

C. Findings and Recommendations

1. Mandatory Repairs

2. Recommended Repairs

a. Normal Vent

b. Tank Exterior

c. Access Platform

d. Water Draw-Off Connection

3. Other Noted Tank Items

a. Overfill Protection

b. Access Manholes

4. Associated Site Upgrades

a. Fire Hydrants

D. Inspection Photographs

E. Tank Configuration Sketch

Appendix ‘1’ – STI Formal External Inspection Checklist

Appendix ‘2’ – STI Monthly and Annual Checklists

General Project Information page 3

A. General Project Information

1. STI SP001 In-Service Inspections

This project will perform in-service inspection of various tanks at facilities throughout the United

States. The basis of these inspections is the formal external inspection recommended in STI SP001

“Standard for the Inspection of Aboveground Storage Tanks”. Additional consideration is given to federal, state, and local regulations as well as applicable military criteria and general industry standards. Unless otherwise noted, all inspections will be conducted while the tanks and associated piping systems remain in service.

For Tank 30147, an STI SP001 Formal External Inspection was performed.

2. Site Information

On May 20th, 2015 Brockenbrough performed a site visit to AASF Davenport located near

Davenport, Iowa to perform inspections of five aboveground storage tanks. AASF Davenport is located adjacent to the Davenport Municipal Airport. This facility is home to several National

Guard Units whose mission is to fly, refuel, and maintain the CH-47F Chinook and UH-72A Lakota helicopters.

3. Previous Inspections

There were no previous formal inspections found to have been performed on Tank 30147.

Tank Construction and Appurtenances page 4

B. Tank Construction and Appurtenances

1. Tank Construction

The tank is constructed to UL Standard 2085 for "Protected Aboveground Tank for Flammable and

Combustible Liquids". The UL Nameplate was present and partially readable. The tank is double wall steel with five lap-welded (swaged) shell courses. Tank heads are flat and lap-welded to the shell. The tank measures 8'-4" diameter by 27'-0" long.

2. Tank Supports and Foundation

The tank is supported by steel saddles, each bearing down on a concrete pier built into the concrete tank pad. The saddles, concrete pier and foundation pad were all found to be in good condition.

3. Secondary Containment

The tank is a double wall protected tank. The tank interstitial space was found to be free of liquid.

There is a leak detection sensor that continuously monitors the interstitial space and reports back to the ATG console.

4. Tank Coating System

The tank is carbon steel, with an exterior coating that appears to be the DoD standard epoxy-polyurethane system. The tank exterior coating was found to be in good condition. All required tank identification, product, and warning labels are present and fully readable. The interior tank coating system is unknown, as the inside of the tank was not accessible.

5. Tank Appurtenances

a. Venting

This tank features a 2-inch open normal vent. This vent capacity is in compliance with the recommendations of STI SP001. The tank has an 8-inch Morrison Brothers emergency vent, Fig

244 with a venting capacity of 453,000 cfh. This vent capacity is also in compliance with the recommendations of STI SP001.

b. Gauging

The tank has a 2-inch nozzle with a Morrison Brothers mechanical clock gauge for local gauging. The clock gauge appears to be reading properly. In addition, the tank includes a 4-inch nozzle with a Veeder Root TLS 350 ATG system with water a probe. The tank also features a 4-inch manual gauging hatch.

Tank Construction and Appurtenances page 5

c. Stairs and Platforms

There is a common catwalk for all five tanks at the site, with an individual access platform for this tank. The catwalk is accessed on each side by a stair (ships ladder). The stair, catwalk and platform are galvanized and found to be in good condition.

d. Grounding and Bonding

There is a grounding wire from a lug (welded to the tank saddle) routed to the concrete pad grounding grid.

e. Other Appurtenances

The tank features an issue pump, mounted on a 20-inch manhole, and a 6-inch nozzle for the product receipt line. The receipt nozzle has an auto shut-off feature to prevent the tank from being overfilled.

6. Tank Piping System

Fuel is received through 4-inch coated carbon steel piping from the associated truck off-loading station. Fuel is issued from the tank to a nearby pump station through 3-inch coated carbon steel piping. After filtration, this piping supplies the nearby refueler truck fillstand or an aircraft refueling cabinet.

Tank Construction and Appurtenances page 6

Table B-1: General Tank Construction Data

Item Description

Owner AASF Davenport

Tank Identification Facility 30147 (Tank 4)

Location AASF Davenport, Davenport, Iowa

Manufacturer Fireguard Tank (by unknown manufacturer)

Design Standard The tank is constructed to UL Standard 2085 for "Protected Aboveground Tank for Flammable and Combustible Liquids"

Year Built 1999 (per available documentation)

Current Product Stored Jet fuel (F-24) specific gravity: 0.79 to 0.84, vapor pressure: 0.039 psia at 70F, flash point: 100F, Class II combustible liquid

Dimensions 8'-4" diameter by 27'-0" long (horizontal cylindrical)

Storage Capacity 10,000 gallons nominal capacity

Cleaning, Inspection, or Repair

No previous inspections or repairs have been performed

Foundation The tank is supported by steel saddles, each bearing down on a concrete pier built into the concrete tank pad

RPB/Leak Detection Interstitial leak sensor reporting back to ATG system

Shell Construction The tank is double wall steel with concrete insulation in the interstice.

The tank is constructed of five lap-welded (swaged) shell courses.

Tank heads are flat and lap-welded to the shell

Stairs/Ladders There is a common catwalk for all five tanks at the site, with an individual access platform for this tank. At each end of the catwalk there is a stair (ships ladder) for access

Manholes 20-inch manhole (mounting for the issue pump)

Interior Coating System Unknown

Exterior Coating System Appears to be the DoD standard epoxy-polyurethane system

Level Gauging Morrison Brothers mechanical clock gauge; Veeder Root TLS 350 ATG system, with water a probe; 4-inch manual gauging hatch

Overfill Protection/Level Alarms

High level alarm associated with ATG system; inlet nozzle is equipped with overfill prevention valve

Piping 4-inch coated carbon steel from truck off-loading station; 3" coated carbon steel to refueler truck fillstand or aircraft refueling cabinet

Venting/Vapor Emission Controls

2-inch open normal vent; 8" Morrison Brothers emergency vent, Fig 244 with a venting capacity of 453,000 cfh

Strapping Tables Generic manual strapping tables provided by Tank Manufacturer

Water Draw-Off/Product Recover System

N/A

Secondary Containment Double wall protected tank system with interstitial leak detection

Fire Protection System No fire protection present on tank (none is required); no fire hydrants found within the general tank vicinity

Findings and Recommendations page 7

C. Findings and Recommendations

Tank 30144 was found to be in generally fair condition. The tank is fully serviceable, with no mandatory deficiencies noted that require immediate repair. There were several items observed, however, that are not in full compliance with federal, state, and local regulations or military criteria. These noted deficiencies are listed below, with repair recommendations and order of magnitude repair cost estimates. For basis of the cost estimate, it is assumed that the repairs will be completed by local action such as the Reoccurring Maintenance and Minor Repair program.

1. Mandatory Repairs

Mandatory repairs represent items that require immediate attention, in order to prevent imminent risk to system operators, equipment integrity, or the adjacent environment. If these repairs cannot be completed within a two-month period, the tank should be removed from service until the repairs are completed. For this tank, no mandatory repairs are required.

2. Recommended Repairs

Recommended repairs represent items that should be addressed in a timely manner in order to prevent future potential risks to system operators, equipment integrity, or the adjacent environment. These items may be required by federal, state and local codes or by military criteria.

The total cost of the required Recommended Repairs for this tank is $16,500.

a. Normal Vent

The existing tank open updraft-style normal vent should be replaced with a pressure/vacuum vent. Although an open vent meets the requirements for this product, a pressure/vacuum vent could help reduce water infiltration into this tank. In order to make room for a water draw-off system (mentioned below), the new normal vent should be co-located with the existing mechanical level gauge.

Estimated Cost: $1,500

b. Tank Exterior

The upper portion of the tank shell is beginning to show signs of dirt, mold, and algae growth.

The tanks should be cleaned to remove all of the material, as over time damage to the coating system will be accelerated by this material. In addition, some spot repairs of the coating system should be performed by cleaning, prepping, and recoating the areas that are showing signs of corrosion. In addition, an identification label for the Tank Facility number should be included along with the other tank markings.

Estimated Cost: $1,500

Findings and Recommendations page 8

c. Access Platform

The existing tank platform provides access to only a few of the tank appurtenances. A new platform should be provided, or the existing one extended, to allow personnel safe access to all pumps, gauges, and other tank appurtenances. This new platform (or platform extension) should be self-supported, and constructed of galvanized steel.

Estimated Cost: $12,000

d. Water Draw-Off Connection

There is currently no water draw-off connection for this tank. In order to remove water that collects within the tank, a water draw-off hand pump with a drop tube extending down to the bottom of the tank should be provided in the existing 2-inch normal vent nozzle. The normal vent should be relocated and combined into a common nozzle with the mechanical gauge.

Estimated Cost: $1,500

3. Other Noted Tank Items

Other noted items represent minor non-critical deficiencies that are not recommended for repair due to a prohibitive cost to benefit ratio or other reasons. If these repairs are deemed necessary by the stakeholders, replacing the tank should be considered.

a. Overfill Protection

UFC 3-460-01, Table 8-1, Item ‘x’, requires tank receipt piping to have a hydraulically operated diaphragm control valve to prevent overfilling of the tank. This tank does not have such a valve. This repair is not recommended, as the benefit of providing the new valve and associated float pilot does not justify the cost of the repair. The facility reports automatic shut-off of the pump at a high-high level alarm, which appears to be adequate for the

Activity’s operational needs.

b. Access Manholes

UFC 3-460-01, Table 8-1.a requires all tanks of this configuration over 5,000 gallons to have two 36-inch access manholes. One of these manholes is required to include an internal ladder.

This repair is not recommended as the benefit of providing the new manholes and ladder does not justify the cost of the repair. The existing 24-inch manhole appears to be adequate for the

Activity’s operational needs.

Findings and Recommendations page 9

4. Associated Site Upgrades

Site Upgrades are recommended upgrades to the site, which would still need to be addressed even if the tank were repaired or replaced. These items may be required by Federal, State and Local

Codes or by Military Criteria. The total Cost of Associated Site Upgrades is $4,000.

a. Fire Hydrants

The nearest fire hydrant to the tank was noted at approximately 450 feet away. UFC 3-460-01

2-15.2.1 requires two fire hydrants within 300 feet of the tank. Provide two fire hydrants within 300 feet of the tank.

Estimated Cost: $4,000

Inspection Photographs page 10

D. Inspection Photographs

Overview of Tank 30147, Locally Identified as Tank #4

Overview of the Fueling Facility, Showing the Truck Off-Loading and Fillstand Area and the Tanks

Inspection Photographs page 11

Tank Appurtenances Including the Interstitial Emergency Vent, Clock Gauge, ATG, and Issue Pump

Tank Appurtenances Including the Gauging Hatch (Through the Access Platform) and Normal Vent

Inspection Photographs page 12

The Tank Saddle and Associated Concrete Footing with the Grounding Wire

A common Catwalk and Platform Provides Access to all Five Tanks and is Reached by a Stair (Ships Ladder) at Each End of the Catwalk

Inspection Photographs page 13

Tank Issue and Receipt Piping is Coated Carbon Steel and Was Found to be in Good Condition

The Tank Truck Off-Loading Station and Refueler Fillstand

Tank Configuration Sketch page 14

E. Tank Configuration Sketch

STI External Inspection Checklist page 15

Appendix ‘1’ – STI Formal External Inspection Checklist

Project Name : :

Project Site : :

Project Location : :

Tank Facility No. : :

Local Tank ID No. : :

Inspection Date : :

Design : UL

# Horizontal Vertical

Manufacturer : :

Dimensions : : Useable =

Construction Date : : N/A :

Construction : Bare Steel Single-Wall Insulated

Coated Steel # Double-Wall Galvanic or

Concrete Double-Bottom

Plastic/Fiberglass Lined :

Secondary

Containment : Earthen Dike Steel Dike

CRDM : N/A Yes

Release Prevention

Barrier : N/A Yes

Interior Coating : :

Piping : Issue : Size -

Material -

Connection Type -

Issue to -

SPCC Mandated Shop-Built AST Inspections

May 20th, 2015

30147

Tank 4

10,000 gallons N/A

Cathodically Protected (Check one below)

Last Repair/Reconstruction Last Change of Service

Omaha District USACE

W9128F-12-D-0006Contract No.

Bryan Strayer

N/A

Tank Specifications

STI SP001 FORMAL EXTERNAL INSPECTION (FEI) CHECKLIST

4-inch

Coated carbon steel

Butt-weld

Truck off-loading station

3-inch

Coated carbon steel

Butt-weld

Date Installed: Type:

Receipt from -

Receipt : Size -

Material -

Connection Type -

Unknown Exterior Coating Appears to be DoD standard epoxy-polyurethane system

Overfill Protection / Level Alarms: High level alarm associated with ATG; Inlet Nozzle Overfill Prevention Valve

Refueler truck fillstand; aircraft refueling cabinet

Type:

Date Installed

API

Rectangular

Other

Unknown

SWRI

1999 (Per documentation)

Jet Fuel (F-24)

Date Installed: Leak sensing probe

N/A

Concrete Synthetic Liner Other

Other

Impressed Current

Product

Capacity

Prior Inspection Date

Inspector Name

General Inspection Information

Fireguard Tank (by unknown manufacturer)

8'-4" diameter, 27'-0" long Nominal =

Inspector Certification Number

Submitted to

Brockenbrough Job No.Davenport, Iowa 15-002.08

AST-990220

AASF Davenport

The tank is supported by steel saddles, each bearing down on a concrete pier built into the concrete tank pad

The tank is supported by steel saddles, each bearing down on a concrete pier built into the concrete tank pad

ITEM

7.1 General

TASK STATUS COMMENTS

No previous inspections or repairs have been performed

Tank had a UL nameplate that was partially readable

Check for :

The tank is constructed to UL Standard 2085 for "Protected Aboveground Tank for Flammable and Combustible Liquids"

A

A

A

7.1.3 Past Records

7.1.4 AST Nameplate Data

7.1.5 AST Fabrication

STI SP001 FORMAL EXTERNAL INSPECTION (FEI) CHECKLIST

NOTE: "A" IN THE STATUS COLUMN MEANS ACCEPTABLE; "X" IN THE STATUS COLUMN MEANS AN ITEM IS UNACCEPTABLE AND THERE IS A COMMENT.

Check for :

7.1.6 Tank Foundation

Record AST data and check for accuracy against actual conditions

Inspect against applicable industry standards

Review prior inspections, repairs and alterations data

Degradation

Ground slopes away from tank

Soil resting against/covering side of tank

A

A

A

A

A

Exposed rebar

Wash-out or voids

Settlement

Cracking

A

N/A

Check for :

Holes or cracks in wall or floor

A

A

A

7.1.8.1 Secondary

Containment

A

A

A

N/A

Secured properly on foundation or grade

7.1.7 Tank Supports

Welds are in good condition

Water drains away from tank

Corrosion or coating failure

A

A

N/A

A

Coating failure

Liquid present in the area?

Liner degradation

Leakage

Foreign materials present in the area

N/A

Corrosion A

A

Pad plates between the supports and shell are in good condition

Cracking or spalling

A

Good overall condition?

Wash-out Double wall protected tank with continuous interstitial leak monitoring

7.1.9.3 Tank Gauges

7.1.12 Tank Shell & Head

Bent members A

Coating Failure?

Ladder, catwalk and platform are galvanized and found to be in good condition

Tank exterior coating was found to be in good condition. All required tank identification, product, and warning labels are present and fully readable.

7.1.8.2 Spill Control &

N/A

Operable and in good condition?

A

A

A

A

A

Corrosion

Rusted bolted connections

Verify that components are moving freely and vent passageways are not obstructed for :

CRDM

Pressure/ vacuum vent poppets

Other moving vent components

A

7.1.9.1 Piping and Piping

Connections

Degradation

ITEM

7.1.8.3 Drain Valves N/A

TASK STATUS

Broken welds

A

7.1.9.2 Vents (Normal/

Emergency) and

Pressure/Vacuum Devices

2-inch Open normal vent

8-inch Morrison Brothers emergency vent, Fig 244 with a venting capacity of 453,000 cfh

There is a common ladder and catwalk for all five tanks at the site, with an individual access platform for this tank.

Corrosion A

7.1.10 Tank Grounding &

Bonding

7.1.11 Stairways, Handrails, and Platforms

A Liquid level gauge length sized correctly for tank diameter?

Alarms are operable?

Strap secured and in good condition?

Check for :

A

A There is a grounding wire from a lug, welded to tank saddle, to the tank pad grounding grid

Adequate size and capacity?

This vent capacity is in compliance with the recommendations of STI SP001

This vent capacity is in compliance with the recommendations of STI SP001

Verify that the primary tank level gauge and secondary tank interstitial gauges move freely and the floats, guides, and attachments are in working order.

Morrison Brothers mechanical clock gauge

A

X

A

Emergency vent covers

A

A

Liquid present in the area

COMMENTS

Good overall condition

Good overall condition Interstitial space was found to be free of liquids

Associated piping was either coated carbon steel or stainless steel, and was found to be in good condition.

Veeder Root TLS 350 ATG system, with water probe and interstitial leak sensor

Clock gauge appears to be reading properly

The ATG gauging display is reportedly functioning properly

STI SP001 FORMAL EXTERNAL INSPECTION (FEI) CHECKLIST

A

Check for :

Stress or leakage

Must be operable and in good condition?

A

7.2.4 Average minimum thickness measurement

Location 1 (inch)

ITEM

A

A

STATUS COMMENTS

7.3.1 / 7.4.1 Tank Shell, Heads, or Roof Dents A

Pinholes

Buckling

Distortion

7.2.2 Consult the tank manufacturer

7.2.1 Review the original tank documentation, such as drawings and packing lists

7.2.3 Exam the tank labels for evidence of a widely accepted tank standard. Consult the referenced standard to determine the minimum design shell thickness Original shell thickness assumed to be 0.25 inch

Location 2 (inch) Location 3 (inch) Location 4 (inch)

Measure the tank thickness of several areas of the tank that have no visible corrosion or pitting

Average thickness (inch)

Check shell plates and welds for : The tank isdouble wall steel with five lap-welded (swaged) shell courses. Tank heads are flat and lap-welded to the shell

TASK

Stress

Mechanical damage

7.3 Horizontal AST / 7.4 Vertical AST or Rectangular AST

A

A

A

A

A

A

A

STI SP001 FORMAL EXTERNAL INSPECTION (FEI) CHECKLIST

7.2 Determine the original shell thickness of the AST

Suggested methods are :

Paint Failure N/A

Holes or corrosion N/A

Low areas and standing water N/A

Check the roof for :

Bulging

Tank exterior coating was found to be in good condition

Exterior Corrosion

Distortion

Cracking

Check shell and ancillary equipment for:

7.4.3 For Vertical ASTs :

Roof

2) Although ladder, catwalk and platform are present and is good condition, there are several tank appurtenances that are difficult to attend to. The platform only offers access to the primary emergency vent and the manual gauging hatch. All other items require a ladder or other means to access

3) There are no fire hydrants located in the vicinity of this tank. It is reported that the local fire department is aware of this situation and has operation procedures in place to address a tank fire, should one occur. Ideally, two fire hydrants should be installed within 300 feet of the storage tanks.

4) Facility personnel have generic 10,000 gallon tank strapping tables which do not identify the tank manufacturer. Although these are adequate to verify the ATG is reading is relatively accurate, strapping tables that are calibrated for the individual tank would be prefered.

Interstitial space was found to be free of liquid or fuel

1) Tank receipt nozzle features a OPW overfill prevention valve, model OPW 61F STOP-350 (model information from cut-sheet)

Operators report interstitial leak sensor is working properly

STI SP001 FORMAL EXTERNAL INSPECTION (FEI) CHECKLIST

Additional Comments:

Leaks or presence of liquid in interstice?

The window is clean and clear in sight leak gauges

The wire gauges of electronic gauges for tightness and corrosion

A

N/A

A

7.5.2 Leaks

Double-Wall ASTs do not require UT readings

Activate the test button, if applicable N/A

7.5.3 Tank thickness

measurement:

A Check if leak detection equipment/ method is operating?

For leak detection equipment, check for:

7.5 Double-Wall AST or Double-Bottom AST

ITEM TASK STATUS COMMENTS

STI SP001 FORMAL EXTERNAL INSPECTION (FEI) CHECKLIST

7.5.1 Leak Detection

Equipment / Method

STI Monthly and Annual Checklists page 16

Appendix ‘2’ – STI Monthly and Annual Checklists

AST INSPECTION STANDARD 29 SEPTEMBER 2011

STI SP001 Monthly Inspection Checklist

General Inspection Information:

Inspection Date: Retain Until Date: (36 months from inspection date)

Prior Inspection Date: Inspector Name:

Tanks Inspected (ID #’s):

Inspection Guidance:

For equipment not included in this Standard, follow the manufacturer recommended inspection/testing schedules and procedures.

The periodic AST Inspection is intended for monitoring the external AST condition and its containment structure. This visual inspection does not require a Certified

Inspector. It shall be performed by an owner’s inspector who is familiar with the site and can identify changes and developing problems.

Upon discovery of water in the primary tank, secondary containment area, interstice, or spill container, remove promptly or take other corrective action. Before discharge to the environment, inspect the liquid for regulated products or other contaminants and disposed of it properly.

(*) designates an item in a non-conformance status. This indicates that action is required to address a problem.

Non-conforming items important to tank or containment integrity require evaluation by an engineer experienced in AST design, a Certified Inspector, or a tank manufacturer who will determine the corrective action. Note the non-conformance and corresponding corrective action in the comment section.

Retain the completed checklists for 36 months.

In the event of severe weather (snow, ice, wind storms) or maintenance (such as painting) that could affect the operation of critical components

(normal and emergency vents, valves), an inspection of these components is required as soon as the equipment is safely accessible after the event.

Item Task Status Comments

1.0 Tank Containment

1.1 Containment

structure

Check for water, debris, cracks or fire hazard

�Yes* �No �N/A

1.2 Primary tank Check for water �Yes* �No

1.3 Containment

drain valves Operable and in a closed position

�Yes �No* �N/A

1.4 Pathways and

entry

Clear and gates/doors operable

�Yes �No* �N/A

2.0 Leak Detection

2.1 Tank Visible signs of

leakage

�Yes* �No

2.2 Secondary

Containment

Visible signs of leakage from tank into secondary containment

�Yes* �No

2.3 Surrounding soil Visible signs of

leakage

�Yes* �No �N/A

2.4 Interstice Visible signs of

leakage

�Yes* �No �N/A

AST INSPECTION STANDARD 30 SEPTEMBER 2011

3.0 Tank Equipment

3.1 Valves a. Check for leaks. �Yes* �No �N/A

b. Tank drain valves must be kept locked.

�Yes* �No �N/A

3.2 Spill

containment boxes on fill pipe

a. Inspect for debris, residue, and water in the box and remove.

�Yes* �No �N/A

b. Drain valves must be operable and closed.

�Yes* �No �N/A

3.3 Liquid level

equipment

a. Both visual and mechanical devices must be inspected for physical damage.

�Yes �No* �N/A

b. Check that the device is easily readable

�Yes �No* �N/A

3.4 Overfill

equipment

a. If equipped with a "test" button, activate the audible horn or light to confirm operation.

This could be battery powered. Replace the battery if needed

�Yes �No* �N/A

b. If overfill valve is equipped with a mechanical test mechanism, actuate the mechanism to confirm operation.

�Yes �No* �N/A

3.5 Piping

connections

Check for leaks, corrosion and damage

�Yes* �No

4.0 Tank Attachments and Appurtenances

4.1 Ladder and

platform structure

Secure with no sign of severe corrosion or damage?

�Yes �No* �N/A

5.0 Other Conditions

5.1 Are there other conditions that should

be addressed for continued safe operation or that may affect the site spill prevention plan?

�Yes* �No

AST INSPECTION STANDARD 31 SEPTEMBER 2011

Additional Comments:

AST INSPECTION STANDARD 32 SEPTEMBER 2011

STI SP001 Annual Inspection Checklist

General Inspection Information:

Inspection Date: Retain Until Date: (36 months from inspection date)

Prior Inspection Date: Inspector Name:

Tanks Inspected (ID #’s):

Inspection Guidance:

For equipment not included in this Standard, follow the manufacturer recommended inspection/testing schedules and procedures.

The periodic AST Inspection is intended for monitoring the external AST condition and its containment structure. This visual inspection does not require a Certified

Inspector. It shall be performed by an owner’s inspector who is familiar with the site and can identify changes and developing problems.

Remove promptly upon discovery standing water or liquid in the primary tank, secondary containment area, interstice, or spill container. Before discharge to the environment, inspect the liquid for regulated products or other contaminants and disposed of it properly.

In order to comply with EPA SPCC (Spill Prevention, Control and Countermeasure) rules, a facility must regularly test liquid level sensing devices to ensure proper operation (40 CFR 112.8(c)(8)(v)).

(*) designates an item in a non-conformance status. This indicates that action is required to address a problem.

Non-conforming items important to tank or containment integrity require evaluation by an engineer experienced in AST design, a Certified Inspector, or a tank manufacturer who will determine the corrective action. Note the non-conformance and corresponding corrective action in the comment section.

Retain the completed checklists for 36 months.

Complete this checklist on an annual basis supplemental to the owner monthly-performed inspection checklists.

Note: If a change has occurred to the tank system or containment that may affect the SPCC plan, the condition should be evaluated against the current plan requirement by a Professional Engineer knowledgeable in SPCC development and implementation.

1.0 Tank Containment

1.1 Containment

structure

Check for:

• Holes or cracks in containment wall or floor

• Washout

• Liner degradation

• Corrosion

• Leakage

• Paint failure

• Tank settling

�Yes* �No �N/A

2.0 Tank Foundation and Supports

2.1 Foundation Settlement or

foundation washout?

�Yes* �No

2.2 Concrete pad

or ring wall

Cracking or spalling? �Yes* �No �N/A

AST INSPECTION STANDARD 33 SEPTEMBER 2011

2.3 Supports Check for corrosion, paint failure, etc.

�Yes* �No �N/A

2.4 Water

drainage

Water drains away from tank?

�Yes �No* �N/A

2.5 Tank

grounding

Strap secured and in good condition?

�Yes �No* �N/A

3.0 Cathodic Protection

3.1 Gavlvanic

cathodic protection system

Confirm system is functional, includes the wire connections for galvanic systems

�Yes �No* �N/A

3.2 Impressed

current system

a. Inspect the operational components (power switch, meters, and alarms).

�Yes �No* �N/A

b. Record hour meter, ammeter and voltmeter readings.

�Yes �No* �N/A

4.0 Tank Shell, Heads, Roof

4.1 Coating Check for coating

failure

�Yes* �No

4.2 Steel

condition

Check for:

• Dents

• Buckling

• Bulging

• Corrosion

• Cracking

�Yes* �No

4.3 Roof slope Check for low points

and standing water

�Yes* �No �N/A

5.0 Tank Equipment

5.1 Vents Verify that

components are moving freely and vent passageways are not obstructed for:

• Emergency vent covers

• Pressure/vacuum vent poppets

• Other moving vent components

�Yes* �No

AST INSPECTION STANDARD 34 SEPTEMBER 2011

5.2 Valves Check the condition of

all valves for leaks, corrosion and damage.

�Yes* �No

5.2.1 Anti-siphon, check and gate valves

Cycle the valve open and closed and check for proper operation.

�Yes �No* �N/A

5.2.2 Pressure

regulator valve

Check for proper operation. (Note that there may be small, 1/4 inch drain plugs in the bottom of the valve that are not visible by looking from above only)

�Yes �No* �N/A

5.2.3 Expansion

relief valve

Check that the valve is in the proper orientation. (Note that fuel must be discharged back to the tank via a separate pipe or tubing.)

�Yes �No* �N/A

5.2.4 Solenoid

valves

Cycle power to valve to check operation.

(Electrical solenoids can be verified by listening to the plunger opening and closing. If no audible confirmation, the valve should be inspected for the presence and operation of the plunger.)

�Yes �No* �N/A

5.2.5 Fire and

shear valves

a. Manually cycle the valve to ensure components are moving freely and that the valve handle or lever has clearance to allow valve to close completely.

�Yes �No* �N/A

b. Valves must not be wired in open position.

�Yes �No* �N/A

AST INSPECTION STANDARD 35 SEPTEMBER 2011

c. Make sure fusible element is in place and correctly positioned.

�Yes �No* �N/A

d. Be sure test ports are sealed with plug after testing is complete and no temporary test fixture or component remains connected to valve.

�Yes �No* �N/A

5.3 Interstitial

leak detection equipment

Check condition of equipment, including:

• The window is clean and clear in sight leak gauges.

• The wire connections of electronic gauges for tightness and corrosion

• Activate the test button, if applicable.

�Yes �No* �N/A

5.4 Spill

containment boxes on fill pipe

a. If corrosion, damage, or wear has compromised the ability of the unit to perform spill containment functions, replace the unit.

�Yes* �No �N/A

b. Inspect the connections to the AST for tightness, as well as the bolts, nuts, washers for condition and replace if necessary.

�Yes* �No �N/A

c. Drain valves must be operable and closed

�Yes* �No �N/A

5.5 Strainer a. Check that the

strainer is clean and in good condition.

AST INSPECTION STANDARD 36 SEPTEMBER 2011

5.5 Strainer b. Access strainer

basket and check cap and gasket seal as well as bolts.

�Yes �No* �N/A

5.6 Filter a. Check that the filter

is in good condition and is within the manufacturer’s expected service life.

Replace, if necessary.

�Yes �No* �N/A

b. Check for leaks and decreased fuel flow

�Yes �No* �N/A

5.7 Flame

arrestors

Follow manufacturer’s instructions. Check for corrosion and blockage of air passages.

�Yes* � No �N/A

5.8 Leak detector

for submersible pump systems

Test according to manufacturer's instructions and authority having jurisdiction (AHJ).

Verify leak detectors are suited and properly installed for aboveground use.

�Yes �No* �N/A

5.9 Liquid level

equipment

a. Has equipment been tested to ensure proper operation?

�Yes �No* �N/A

b. Does equipment operate as required?

�Yes �No* �N/A

c. Follow manufacturer’s instructions

�Yes �No* �N/A

5.10 Overfill

equipment

a. Follow manufacturer’s instructions and regulatory requirements for inspection and functionality verification.

�Yes �No* �N/A

b. Confirm device is suited for above ground use by the manufacturer

AST INSPECTION STANDARD 37 SEPTEMBER 2011

6.0 Insulated Tanks

6.1 Insulation Check condition of

insulation for:

• Missing sections

• Areas of moisture

• Mold

• Damage

�Yes* � No �N/A

6.2 Insulation

cover or jacket

Check for damage that will allow water intrusion

�Yes* No �N/A

7.0 Miscellaneous

7.1 Electrical

wiring and boxes

Are they in good condition?

�Yes �No* �N/A

7.2 Labels and

tags

Ensure that all labels and tags are intact and readable.

Additional Comments:

1011 Boulder Springs Drive, Suite 200 Richmond, Virginia 23225

Phone: 804-592-3900 Fax: 804-592-3901 www.brockenbrough.com