Attachment J1 - QSA-FY21-FAC 110-Tank 2-FINAL.pdf

US Army Corps of Engineers Omaha District

API 653 In‐Service Inspection Report

Quonset Point ANG, RI Tank 2 (Facility 110)

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

(USACE POL‐MCX)

6/8/2021

Table of Contents

ACRONYMS AND ABBREVIATIONS

GENERAL SUMMARY

INSPECTION DATE

PREVIOUS INSPECTION DATES

RECOMMENDED FUTURE INSPECTION DATES (CALCULATIONS SHALL BE PROVIDED)

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection

2. Site Information

B. TANK INSPECTION COMMENTS

1. Tank Construction

2. Secondary Containment

3. Tank Foundation

4. Tank Bottom

5. Tank Shell

6. Tank Floating Roof

7. Tank Fixed Roof

8. Tank Appurtenances

9. Tank Piping System

10. Fire Protection System

C. FINDINGS AND RECOMMENDATIONS

1. MANDATORY REPAIRS per API 653, UFC 3‐460‐01, or AW 78‐24‐27 Standards

2. REQUIRED REPAIRS to Fully Comply with API 653, or, Federal, State, and Local Codes

3. RECOMMENDED REPAIRS TO FULLY COMPLY WITH UFC 3‐460‐01, AW 78‐24‐27 Standards or as Part of Regular Maintenance

APPENDIX A: ENGINEERING CALCULATIONS ..................................................................................... A‐1

APPENDIX B: ENGINEERING DRAWINGS ............................................................................................ B‐1

APPENDIX C: ENGINEERING DATA ..................................................................................................... C‐1

APPENDIX D: API 653 CHECKLISTS FOR TANK INSPECTIONS ............................................................. D‐1

APPENDIX E: PHOTOGRAPHS………………………………………………………………………………………………………….E‐1

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

HLA High Level Alarm

HLCS High Level Control Shutoff

HHLA High‐High Level Alarm

LLA Low Level Alarm

LLLA Low‐Low Level Alarm

MFL Magnetic Flux Leakage

MT Magnetic Particle Testing

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

ULS Ultra Low Sulfur

UT Ultrasonic Testing

VT Visual Testing

GENERAL SUMMARY

Summary of Inspection

An API Standard 653 In‐Service inspection of Tank 2 (Facility 110) at Quonset Point ANG, RI was completed on June 8, 2021. The shell service life evaluation performed as having greater than 30 years of remaining shell life under current conditions.

Significant Findings (overview)

Mandatory None

Short Term

1. The 6‐inch issue line is not resting on the only pipe support inside the secondary containment area. (Quantity: 1)

2. The 6‐inch receipt line is not resting on a pipe support inside the secondary containment area.

(Quantity: 1)

3. The 6‐inch issue line and 6‐inch receipt line do not have link seals at the penetration of the secondary containment wall. (Quantity: 1 each)

4. The weld spacing is inadequate between the 36‐inch manhole and the shell vertical weld.

(Quantity: 1 area)

5. The weld spacing is inadequate between the 36‐inch manhole and the shell‐to‐bottom weld.

(Quantity: 1 area)

6. The lower nozzle of the high‐level control assemblies has a pinhole in the weld. (Quantity: 1)

7. The 24‐inch flush deck cleanout gasket/cover has four (4) areas of staining from weeping fuel.

No wetting was noted during this inspection. Activity reported that this has been repaired, but the problem continues. (Quantity: 1)

Long Term

1. The tank does not have a cathodic protection system. (Quantity: 1 system)

2. The tank does not have a bottom leak detection system. (Quantity: 1 system)

3. The tank only has two (2) ground cables. One of the ground cables is exothermically welded to an anchor chair. (Quantity: 1 existing, 2 new)

4. The vertical members of the anchor chairs are not notched to clear the shell‐to‐bottom weld and are not notched at the top plate as shown in AW 78‐24‐27. (Quantity: 8)

5. The supports of the mechanical tape level gauge do not have reinforcement plates on the shell.

(Quantity: 4 supports)

6. The circumferential stairway treads are welded directly to the shell. The stairway configuration is constructed as shown in AW 78‐24‐27 as a free‐standing stairway. (Quantity: 1 stairway)

7. The 36‐inch upper manhole does not have a davit arm. (Quantity: 1)

8. The tank does not have two (2) 36‐inch manholes. (Quantity: 1 additional)

9. The roof has a 12‐inch center vent in lieu of a 24‐inch center vent. (Quantity: 1)

June 8, 2021 Ultra‐Sonic Thickness Meter General Electric

DMS 2

Zeroing Procedure, Copper Coating Calibration Procedure, and Two Point Calibration Procedure Wayne K. Bailey API 653 Inspector No. 1331

Surveying Tool Leica

3D DISTO

Manufacturer Wayne K. Bailey API 653 Inspector No. 1331

July 2015

INSPECTION DATE

API In-Service Inspection Date:

Equipment Used:

Manufacturer:

Model:

Calibration Methods Used:

Inspector(s):

Equipment Used:

Manufacturer:

Model:

Calibration Methods Used:

Inspector(s):

PREVIOUS INSPECTION DATES

API Out‐of‐Service (Internal) Inspection Date:

API In‐Service (External) Inspection Date: July 2015

RECOMMENDED FUTURE INSPECTION DATES (CALCULATIONS SHALL BE PROVIDED)

API Out‐of‐Service (Internal) Inspection Date: July 2025 (due to no CP system) API In‐Service (External) Inspection Date: June 2026

Wayne K. Bailey, API‐653 #1331

GENERAL TANK INFORMATION

ITEM DESCRIPTION

Owner US Air Force Location Quonset Point ANG Facility Number 110 Tank Number 1 State / Country Rhode Island, United States City North Kingston Inspection Date June 8, 2021 Tank Manufacturer Original: Unknown Modified: CAPE Environmental, Inc.

Design Standard API Standard 650 8th Edition

Date of Construction Original: 1980 Modified: 2015 by CAPE Environmental, Inc.

Tank Contents Jet A Tank Serial Number Nameplate Unreadable Tank Diameter 27’ 0” Shell Height 28’ 3” Product Height 24’ 7” Tank Capacity 2,500 barrels (105,039 gallons) Foundation Concrete Ringwall

Construction

Bottom Lap‐Welded (Pie Shaped) Shell Butt‐Welded (Cylindrical) Floating Roof Aluminum Fixed Roof Lap‐Welded (Pie Shaped)

Material

Bottom Carbon Steel, A‐36 Shell Carbon Steel, A‐36 Floating Roof Aluminum Fixed Roof Carbon Steel, A‐36

Cathodic Protection None Interior Coating System Thin Film Epoxy/Polyurethane Exterior Coating System Thin Film Epoxy/Polyurethane Level Gauging VAREC MTG, ENRAF ATG, and VITO Water & Temp Probe Overfill Protection Mechanical Automatic Shut‐Off

Piping

Receipt 6" Carbon Steel Issue 6" Carbon Steel Low Suction 4” Carbon Steel Water Draw‐Off 2" Carbon Steel

Level Alarms & Controls

Description ENFAR ATG Independent High‐High Level Alarm: 24’ 02‐00/16” 24’ 02‐00/16” High‐Level Alarm: 23’ 05‐08/16” 23’ 05‐08/16” Low‐Level Alarm: 3’ 10‐02/16” 3’ 10‐02/16” Low‐Low Level Alarm: 3’ 01‐12/16” 3’ 01‐12/16” High‐Level Control Shut‐off: 23’ 11‐12/16”

Type of Internal Floating Roof Sealed Honeycomb Cell Floating Pan

A. GENERAL PROJECT INFORMATION

1. API 653 Inspection This project will perform API 653 inspections of various tanks at facilities throughout the United States. Additional consideration is given to federal, state, and local regulations, as well as applicable military criteria and general industry standards.

An API Standard 653 In‐Service inspection was performed for Tank 2 (Facility 110).

2. Site Information

On June 8, 2021, InterSpec, LLC performed an API 653 In‐Service inspection of Tank 2 (Facility 110), located at Quonset Point ANG, RI.

B. TANK INSPECTION COMMENTS

1. Tank Construction Tank 2 is a nominal 105,039 gallon (2,500 barrel), 27’ 0” diameter by 28’ 3” tall, Jet A, aboveground vertical storage tank. The original construction nameplate was not affixed to the tank. The tank had an upgrade/repairs in 2018 by CAPE Environmental, Inc. that included new gauging poles and internal/external coatings, as displayed by a nameplate.

2. Secondary Containment

40 CFR 112.7(c) states that the entire secondary containment system, “including walls and floor, must be capable of containing oil and must be constructed so that any discharge from a primary containment system ... will not escape containment before cleanup occurs.” 40 CFR 112.8(c)(2) and 40 CFR 112.12(c)(2) state that diked areas must be “sufficiently impervious to contain oil.” The purpose of the secondary containment requirement is to prevent discharges, as described in 40 CFR 112.1(b); therefore, effective secondary containment methods must be able to contain oil until the oil is cleaned up. The secondary containment area consists of concrete floor and concrete vertical walls. An informal containment evaluation was conducted. The containment appears to be of sufficient size to contain a total tank loss per UFC 3‐460‐01 Section 8‐14.2.1, “The containment area needs to have sufficient capacity to contain the tank contents plus one foot of freeboard. If the containment has the capacity to contain the tank contents plus one foot of freeboard, the containment area is sufficient.” The secondary containment area appears to be properly graded to drain water away from the tank in accordance with NFPA 30.

3. Tank Foundation The tank rests on a concrete ringwall. The tank does not have a cathodic protection system.

The tank does not have a bottom leak detection system. The foundation was visually evaluated during the inspection for broken concrete, spalling, cracks, and vegetation against the bottom of the tank. The tank bottom‐to‐ringwall sealant was inspected, and no sealant was observed. A shell settlement survey was performed during the inspection in accordance with Appendix B of API Standard 653. Settlement results are listed in Appendix A.

4. Tank Bottom The bottom was not evaluated.

5. Tank Shell The shell is constructed of A‐36 carbon steel material. The shell is a cylindrical design, butt‐ welded together, consisting of four (4) courses. The shell exterior has a thin film epoxy coating system. The coating was inspected for disbonding, adhesion, deterioration, and discoloration; it is in satisfactory condition. The shell was evaluated for remaining metal thickness utilizing ultrasonic technology. The ultrasonic thickness measurements and thickness measurement locations (TML) are listed in the Shell Plate Thickness Measurements table in Appendix A. A shell service life evaluation performed on all shell courses shows the shell has a remaining life of greater than 30 years under current conditions. The shell service life evaluation is shown in the Shell Service Life Evaluation table in Appendix A. Roundness, plumbness, peaking, and banding of the shell are all within the allowable tolerances of API Standard 653. The tank appears to be stable and does not appear to be in danger of overturning or buckling due to high winds or seismic conditions.

6. Tank Floating Roof The tank is equipped with an internal floating roof. The floating roof is a sealed honeycomb cell floating pan. The roof seals and opening gaskets were inspected for tears and deterioration from the roof inspection hatches; they are in satisfactory condition.

7. Tank Fixed Roof The fixed roof is a self‐supported cone roof constructed of A‐36 carbon steel material. The fixed roof has an epoxy coating system on the exterior. The coating was inspected for disbonding, adhesion, deterioration, and discoloration; it is in satisfactory condition. The fixed roof was evaluated for remaining metal thickness using ultrasonic technology. The ultrasonic thickness measurements and ultrasonic thickness locations (TML) are listed in the Fixed Roof Plate Thickness Measurements table in Appendix C.

8. Tank Appurtenances Note: The following table is an overview of the appurtenance status regarding UFC‐3‐460‐01 and AW 78‐24‐78 standards and does not reflect API standards, federal regulations, state regulations, and/or local regulations.

Overview of Appurtenance

Item Appurtenance

Installed Fully or Partially

Meets Current Design

Standards A. Manhole

1. 36‐inch manhole located above the IFR high leg position. ☒ ☒

2. At least two (2) fixed roof manholes. ☒ ☐

3. At least two (2) 36‐inch shell manholes. ☒ ☒

4. A bolted cover in the fixed roof for installation of IFR. ☒ ☒ B. Inspection Hatches

1. At least of four (4) 24‐inch square inspection hatches on fixed roof with IFR (min. spacing 32 feet).

C. Ladder/Stairs

1. Internal ladders with internal floating roofs. ☒ ☒

2. Access to high level shut‐off and alarms. ☒ ☒

D. Level Alarms An individual automatic level alarm system, independent of the gauging device or system. Include high, high‐high, low and low‐low level alarms. On aboveground tanks: provide a means to manually test each alarm sensor to ensure system operability without a full tank; locate level alarm equipment for ready access from ground level, stairway platforms, or roof access.

1. High‐High Level Alarm ☒ ☒

2. High Level Alarm ☒ ☒

3. Low Level Alarm ☒ ☒

4. Low‐Low Level Alarm ☒ ☒

E. Vents

1. Open atmospheric vents with weather hoods and bird screens. ☒ ☒

2. Emergency relief venting (a floating roof or frangible joint may be used to fulfill emergency relief requirements).

F. Gauge/Gauge Hatch/Stilling Wells

1. A mechanical liquid level gauge. ☒ ☒

2. Automatic Tank Gauging (ATG) (ENRAF fuel level & VITO water level systems).

3. One 10‐inch roof flanged nozzle with an 8‐inch aluminum, fully slotted, stilling well for ATG near the edge of the roof near the top of the stairway platform for fuel level ATG.

4. One 8‐inch roof flanged nozzle with a 6‐inch aluminum, fully slotted, stilling well for temperature and water bottom sensor, as close to or in the tank sump as possible for water level ATG.

5. One 10‐inch roof nozzle and an aluminum, slotted stilling well for gauging and sampling.

G. Piping Connection

1. Receipt Line ☒ ☒

Overview of Appurtenance

Item Appurtenance

Installed Fully or Partially

Meets Current Design

Standards

2. Low Suction Line ☒ ☒

3. Issue Line. ☒ ☒

H. Overfill Protection

1. Overfill protection with a hydraulically operated diaphragm control valve.

I. Water Draw‐Off

1. Water draw‐off system. ☒ ☒

J. Ball Joints

1. Ball joints on pipes to relieve strain caused by tank settling or seismic activity or other means.

K. Cable Supports

1. On the fixed roof of all tanks, provide two scaffold cable supports ☒ ☒

a. Water Draw‐Off System

1) Water Draw‐Off Line: The water draw‐off piping consists of 1‐inch stainless steel piping. The line has a 2‐inch double‐block and bleed valve at the shell.

2) Product Saver Tank: The product saver tank (PST) is constructed of stainless steel.

The PST is grounded.

b. Low Suction System

The tank is equipped with a low suction line. The 4‐inch stainless steel line is tied into the issue line.

c. Issue Line The 6‐inch issue line is stainless steel. The line is protected from overpressure with a thermal relief system. The thermal relief system consists of 1‐inch welded stainless steel piping and fittings.

d. Receipt Line The 6‐inch receipt line is stainless steel. The line is protected from overpressure with a thermal relief system. The thermal relief system consists of 1‐inch welded stainless steel piping and fittings.

e. Automatic Tank Gauging (Fuel Level) The tank is equipped with an ENRAF system for electronic fuel level gauging. The system is installed in an 8‐inch slotted carbon steel stilling well.

f. Automatic Tank Gauging (Water Level) The tank is equipped with an ENRAF VITO system for electronic water level gauging.

The system is installed in a 6‐inch slotted stainless steel stilling well. This stilling well is located near the sump.

g. Mechanical Tank Gauging The tank is equipped with a VAREC mechanical tape level gauge for mechanical fuel level gauging. The system is in functional condition.

h. Tank Sampling\Manual Gauging The tank is equipped with a separate stilling well for sampling and manual gauging.

i. Level Alarms\High Level Shut‐Off The ENRAF system provides low, low‐low, high, and high‐high level alarms. The tank is equipped with independent low, low‐low, high, and high‐high level alarms.

The high level alarm assembly and high level shut‐off assembly are accessible from extended stair treads on the circumferential stairway. The piping consists of 1‐inch welded stainless steel piping.

j. Ladder and Platforms

The tank’s fixed roof is accessible by a circumferential stairway mounted on the shell of the tank. The circumferential stairway has platforms for the upper manhole and at the fixed roof. The floating roof is accessible by in internal ladder through a 24‐inch hatch on the fixed roof.

k. Grounding

The tank has two (2) grounding straps around the circumference of the tank.

l. Anchoring

The tank has eight (8) anchor chairs around the circumference of the tank.

9. Tank Piping System Fuel is received and issued by trucks.

10. Fire Protection System The fire department provides fire protection. A fire hydrant is near the tank along the accessway.

C. FINDINGS AND RECOMMENDATIONS

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

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.

None

2. REQUIRED REPAIRS to Fully Comply with API 653, or, Federal, State, and Local Codes 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.

a. Berm Penetrations OBSERVATION: The 6‐inch issue line and 6‐inch receipt line do not have link seals at the penetration of the concrete secondary containment wall.

CODE REFERENCE: AW‐78‐24‐27 Drawing CD.10 (Concrete Wall Penetration Detail) RECOMMENDATION: Install link seals at the penetration of the concrete secondary containment wall. (Quantity: 1 each)

b. Manhole Repad Weld Space at Vertical Weld

OBSERVATION: The weld spacing is inadequate between the 36‐inch manhole and the shell vertical weld. The weld spacing measured 1.5 inches. Previous reports do not indicate any weld testing.

CODE REFERENCE: API Standard 650 Section 5.7.1.1 RECOMMENDATION: Magnetic particle (MT) examination should be performed on the affected welds. Section 5.7.1.1. Note: MT examination will be required on all future inspections unless modified. (Quantity: 1 Area)

c. Manhole Repad Weld Space at Bottom OBSERVATION: The weld spacing is inadequate between the reinforcement of the 36‐inch manhole and the shell‐to‐bottom weld. The weld spacing measured 2.5 inches. Previous reports do not indicate any weld testing.

CODE REFERENCE: API Standard 650 Section 5.7.1.1 RECOMMENDATION: Magnetic particle (MT) examination should be performed on the affected welds. Note: MT examination will be required on all future inspections unless modified. (Quantity: 1 Area)

d. High Level Control Nozzle Weld Defect OBSERVATION: The lower nozzle of the high‐level control assemblies has a pinhole in the weld. The pinhole does not penetrate through the entire weld. This nozzle is below the maximum liquid level.

CODE REFERENCE: None RECOMMENDATION: Repair the pinhole. (Quantity: 1)

e. Flush Deck Cleanout Gasket OBSERVATION: The 24‐inch flush deck cleanout gasket/cover has four (4) areas of staining from weeping fuel. No wetting was noted during this inspection. Activity reported that this has been repaired, but the problem continues.

CODE REFERENCE: None RECOMMENDATION: Tighten the bolts to stop weeping. Replace the gasket if weeping continues at the maximum torque of the bolts. (Quantity: 1)

3. RECOMMENDED REPAIRS TO FULLY COMPLY WITH UFC 3‐460‐01, AW 78‐24‐27 Standards or 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. Issue Line Pipe Support in Containment Area OBSERVATION: The 6‐inch issue line is not resting on the only pipe support inside the secondary containment area.

CODE REFERENCE: AW‐78‐24‐27 Drawing CD.11 Detail PS‐2 RECOMMENDATION: Replace the pipe support with an adjustable pipe support in accordance with AW 78‐24‐27 Drawing CD.11 Detail PS‐2. (Quantity: 1)

b. Receipt Line Pipe Support in Containment Area OBSERVATION: The 6‐inch receipt line is not resting on a pipe support inside the secondary containment area. Note: The receipt line shares a common pipe support.

CODE REFERENCE: AW‐78‐24‐27 Drawing CD.11 Detail PS‐2 RECOMMENDATION: Replace the pipe support with an adjustable pipe supports in accordance with AW 78‐24‐27 Drawing CD.11 Detail PS‐2. (Quantity: 1 each)

c. Cathodic Protection System OBSERVATION: The tank does not have a cathodic protection system for the bottom. Note:

The previous out‐of‐service inspection report did not reveal any underside corrosion.

CODE REFERENCE: UFC 3‐460‐01 Sections 12‐8 and AW 78‐24‐27 Drawings ED.01 ‐ ED.04 RECOMMENDATION: Install a cathodic protection system when a new bottom is required to be installed. (Quantity: 1 system)

No Photos

d. Bottom Leak Detection OBSERVATION: The tank does not have a bottom leak detection system.

CODE REFERENCE: UFC 3‐460‐01 Sections 12‐7 RECOMMENDATION: Install bottom leak detection when a new bottom is required to be installed.

No Photos

e. Tank grounding OBSERVATION: The tank only has two (2) ground cables. One of the ground cables is exothermically welded to an anchor chair.

CODE REFERENCE: AW 78‐24‐27 Drawing ED.02 Details 1 and 2, and API Std 650 Section 5.8.11.3

RECOMMENDATION: Exothermically weld the current grounding cable to the ground lug in accordance with AW 78‐24‐27 Drawing ED.02 Details 1 and 2. Install two (2) additional grounding cables in accordance with AW 78‐24‐27 Drawing ED.02 Details 1 and 2.

(Quantity: 1 existing, 2 new)

f. Anchor Chair Configuration OBSERVATION: The vertical members of the anchor chairs are not notched to clear the shell‐to‐bottom weld and are not notched at the top plate as shown in AW 78‐24‐27.

CODE REFERENCE: AW 78‐24‐27 Drawing D.04 Details 1 and 2 RECOMMENDATION: Add notches on the vertical members of the anchor chairs at the shell (top and bottom) in accordance with AW 78‐24‐27 Drawing D.04 Details 1 and 2.

(Quantity: 8 anchor chairs)

g. Mechanical Tape Gauge Shell Supports OBSERVATION: The supports of the mechanical tape level gauge do not have reinforcement plates on the shell.

CODE REFERENCE: AW 78‐24‐27 Drawing D.07 Detail 1 RECOMMENDATION: Install reinforcement plates in accordance with AW 78‐24‐27 Drawing D.07 Detail 1. (Quantity: 4 supports)

h. Circumferential Stairway Design OBSERVATION: The circumferential stairway treads are welded directly to the shell. The stairway configuration is not constructed as shown in AW 78‐24‐27 as a free‐standing stairway.

CODE REFERENCE: AW 78‐24‐27 Drawing D.11 Details 1, 2, and 4 RECOMMENDATION: Provide a circumferential stairway designed in accordance with AW 78‐24‐27 Drawing D.11 Details 1, 2, and 4. (Quantity: 1 stairway)

i. Upper Manhole Davit Arm OBSERVATION: The 36‐inch upper manhole does not have a davit arm.

CODE REFERENCE: AW 78‐24‐27 Drawing D.10 Detail 3 RECOMMENDATION: Install a davit arm in accordance with AW 78‐24‐27 Drawing D.10 Detail 3. (Quantity: 1)

j. Second Manhole

OBSERVATION: The tank has only one 36‐inch manhole and does not have a second 36‐inch manhole 180‐degrees from the current manhole. Note: The tank does have a flush deck cleanout near opposite of current manhole.

CODE REFERENCE: UFC 3‐460‐01 Table 8‐1 Item (f) and AW 78‐24‐27 Drawing D.10 Details 3 and 6 RECOMMENDATION: Install a second 36‐inch manhole 180‐degrees from the existing manhole. (Quantity: 1)

k. Roof Center Vent OBSERVATION: The fixed roof has a 12‐inch center vent and is not 24 inches or designed in accordance with AW 78‐24‐27.

CODE REFERENCE: AW 78‐24‐27 Drawing D.09 Detail 2 RECOMMENDATION: Provide a 24‐inch center vent designed in accordance with AW 78‐24‐ 27 Drawing D.09 Detail 2. (Quantity: 1)

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Se am is th e fir st s ea m le ft of th e fir st m an w ay le ft of th e st ai rw ay in th e fir st s he ll co ur se v ie w in g fro m th e ou ts id e.

Th e nu m be r i n th e up pe r l ef t c or ne r o f e ac h pl at e id en tif ie s th e pl at e by th e co ur se a nd po si tio n of th e pl at e in th at c ou rs e.

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O w ne r/O pe ra to r:

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R ev is io n

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R ev is io n D at e:

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/L eg en d:

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6" Receipt 6" Issue

N o

Li nk

S ea l N o Li nk S ea l

N o

C on ta ct

N o

C on ta ct

D ra in

Se co nd ar y co nt ai nm en t c on st ru ct io n is co nc re te fl oo r w ith c on cr et e sl op ed w al ls . T he in si de m ea su re d

.5 ft b y

.1 ft . T he o ut si de m ea su re d

.5 ft b y

.5 ft

N o ex po se d cr ac ks e xi st in th e co nc re te . A ll re pa ire d cr ac ks a re s at is fa ct or y.

Th e re ce ip t l in e is n ot to uc hi ng o ne o f t he p ip e su pp or ts . T he is su e lin e is n ot to uc hi ng th e on ly p ip e su pp or t.

Th e re ce ip t a nd is su e lin es d o no t h av e lin k se al s at th e co nt ai nm en t p en et ra tio n.

N or th

B-7

C-1

C-2

C-3

C-4

C-5

C-6

C-7

D-1

D-2

D-3

D-4

D-5

D-6

D-7

NOTES:

D-8

E-1

E-2

E-3

E-4

E-5

E-6

E-7

E-8

E-9

E-10

E-11

E-12

E-13

E-14

E-15

E-16

E-17

E-18

E-19

E-20

E-21