3_Mil_Gallon_Tank_Inspection_Reports_-_North_Tank_1_-_Attachment_A2.pdf

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Cincinnati / Northern Kentucky International Airport (CVG)

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North Hebron KY 41048

Interior Lining Inspection Report

August 29, 2022

Report commissioned by:

Scott Thacker, Sr. Manager Environmental Operations

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000 Cincinnati, OH 45275

Sthacker@cvgairport.com

Prepared by:

Gregory Charles Hardig Sr.

NACE CIP Level-3 Cert # 3494 mailto:Sthacker@cvgairport.com

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

General:

The plan for the day is to report on the condition of the liner in the 3M-North tank.

Environmentals were recorded. Air quality was good with 20.8/oxygen.

With JSA and a meaningful discussion on safety and the plan for entering the tank, I made entry.

In General, this tank lining is in good shape. I found only one repair location on the floor. The rest of the repairs were scattered around the boot; within the first 12” of the wall and out onto the first 24” to 36” on the floor from the wall.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

This is what most of the blisters looked like

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Note: the blisters along the wall.

Also, the liquid residue in the location closest to the wall.

This was the only location noted on the floor.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Summary:

All in, there measures about 125 to 135’ of repairs need at the parameter around the inside base of the tank. The cleaning crew would do well to re-clean the parameter up 12-18” on the wall and out 3 to 4’ out from the wall the entire parameter. They should use the cleaning chemicals the remove the hydrocarbon and the vacuum to remove the rinse liquid.

As a point of record, it is noted that some early signs of re-bar corrosion are visible in the ceiling. There is no visual delamination of the concrete seen with the lighting on-hand. This is perhaps a factor of ware from the original 2000 construction. This should be looked at and further documented in future inspections.

Respectfully submitted.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and recommendations are subject to change and the engineer/inspector assumes no liability for its use or outcome as contained in this report.

Corrosion Protection Resources LLC. All rights reserved

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022 www.cprcoatings.com http://www.cprcoatings.com/

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

September 7, 2022

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

The plan for the day is to re-Inspect and report on the condition of the liner in the 3M-North tank specifically considering the additional cleaning in the area located at the parameter of the tank at the wall/floor joint.

The Blue arrow indicates the location I will focus the inspection.

entry.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Close investigation found a filler material that had the look and feel of Styrofoam. To further investigate what this material was, I used a strong solvent (MEK, Acetone, & MIBK) to do a solvent rub. The end in mind was to determine what is the make-up of the white semi-soft granular material was.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

The material softened when rubbed with the solvent blend.

When we consider how this material was placed, it was likely that it was used as a form of backer to fill a void before repairs to the “boot” part of the liner was repaired.

It is noted that the “Boot” is the rubber lining installed over the original concrete/Gunnite when the tank was first constructed. The original boot was about 12-18” up the wall and 10-15” out onto the tank bottom.

The blue lines indicate the general location of the original boot.

The white is the exposed backer material.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

This photo shows several issues:

1) The blue lined are where the boot had been previously cut & and removed.

2) The black material located in between the blue lines is thin, less than 25/mils

3) The material was in many cases found to be black granular beads that looked like it was

“dry-spray” when it was applied and not well adhered.

4) You can see that where I inserted the probe into the already split liner, the white backer material was underneath it.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

You can see more closely the granular profile (Dry spray) of the black lining material that is split.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

You can see again the common condition of the parameter around the bottom of the tank wall/floor interface.

Summary:

After the contractor completed the final cleaning and vacuumed the interior tank chime, the damage was found to be mor extensive than originally found. I would estimate that 85% to 95% of this area is damaged.

I believe that based upon the solvent wipe that we conducted, there is a high likely hood that the tank cargo is penetrating through the liner in this area and needs urgent repair.

This will require a change in the scope of work already under contract in this tank.

The recommended change should be this:

First complete repairs as planned on the main floor of the tank. Then, vacuum up any remaining water liquid from the floor surface. Then begin repairs to the tank wall/floor interface.

The new scope I n the tank/wall interface is:

Abrasive blast the split in the boot. This would be to 12” out on the tank floor and up 6-8” up the wall. Ion locations where there are blisters on the floor within the blast zone on the floor; these too will be abrasive blasted. After the abrasive is removed and cleaned the next steps can take place.

Then the area should be solvent wiped with alcohol and conditioned with the CIM Surface conditioner, and then a layer of CIM trowel-grade places at 30+ mils thickness. While the first lift of CIM is wet, a nylon/composite reinforcing scrim-cloth of a with greater than the cut in the boot (that is 4-6” wide) then covered with 1 to 2 additional lifts of the CIM for an additional 40 to 60/mils of CIM.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

This will eliminate the risk of the tank cargo leaking into the ground. In the 3-year cycle of inspection, this area should be again inspected for change after the repairs.

As a point of record, it is noted that some early signs of re-bar corrosion are visible in the ceiling. With further discussion with the maintenance management, it is found that in one of the locations there is an organic filter that pumps hydrogen-sulfide back into the tank. At the point of entry, there is greater concrete degradation to the entry, and the ceiling around the location of point of entry. There is no visual delamination of the concrete seen with the lighting on-hand.

This is perhaps a factor of ware from the original 2000 construction. This should be looked at and further documented in future inspections.

Respectfully submitted.

Gregory Charles Hardig Sr.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 9-9-2022

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

September 9, 2022

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000 after abrasive blast cleaning in the area located at the parameter of the tank at the wall/floor joint.

Environmentals were recorded. Air quality was good with 20.8/oxygen.

The blast cleaning was progressing and exposed some areas where the boot had been repaired in the past. Some additional work will be done once the abrasive is removed. This will include cutting away loose rubber/materials, and additional braided wire wheels to rough up the area before the conditioner and CIM application begins.

This is a spot located on the wall just up from the floor.

Repairs will move forward on the perimeter of the wall.

Waste entry through the floor.

In the morning before blasting started, the entire floor was vacuumed where any liquid was left presumed from the surface prep process.

By midafternoon, some of the freshly repaired spots on the main floor were bubbling and actively leaking a liquid thought to be water.

In the time of about 5/hrs one spot leaked about 8 to 10/gallons of liquid through the floor

After the contractor completed the blast cleaning and vacuumed the interior tank chime parameter, and the additional cutting and grinding are complete, they will apply 1 lift of CIM and embed a nylon/composite scrim-cloth into it while it is wet.

Then apply 60/mills additional material on top of the scrim-cloth.

The liquid entering the tank through the floor may be a result of poor exterior parameter draining. If the parameter draining could be resolved, then this issue would likely go away.

Respectfully submitted.

Gregory Charles Hardig Sr.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Final Inspection Report 9-21-2022

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

September 21, 2022

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Final Inspection Report 9-21-2022

The plan for the day is to Inspect and report on the completion of the repairs of the liner in the 3M-North tank after abrasive blast cleaning in the area located at the parameter of the tank at the wall/floor joint.

Environmentals were recorded. Air quality was good with 20.8/oxygen.

Starting at the ladder and moving clockwise around the tank, I recorder the completed work.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Final Inspection Report 9-21-2022

There was one spot in the parameter just near one of the floor drains. This spot is weeping water the is similar to that weeping previously reported in the floor of the tank. Using a QUVa lamp I tested for hydrocarbons and found none.

It is noted that the leak was very small.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Final Inspection Report 9-21-2022

I continued to work my way around the tank. The completed work looked good.

The contractor took extra care cleaning the wall/floor joint. Then applying the CIM Trowel-grade and while wet, embedded the composite scrim cloth into it. Then the applied the CIM pre-mix over the top tp create a strong liner.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Final Inspection Report 9-21-2022

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Final Inspection Report 9-21-2022

I completed the inspection of the parameter.

I then relooked at the main floor to see if anything had changed since those repairs were completed.

No changes were recorded. Still some weeping in the same places. I tested for hydrocarbons with the QUVa lamp. Only water was present.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Final Inspection Report 9-21-2022

While the ceiling is difficult to photograph, It is noted that there is early signs of some exposed reinforcing rod. This should be watched in future inspections for increase in degradation.

After the contractor completed the repairs, I find that the tank is fit to go back in service.

The liquid entering the tank through the floor may be a result of poor exterior parameter draining. If the parameter draining could be resolved, then this issue would likely go away.

Future inspections should track any changes in the lining as well as the ceiling steel exposure.

Respectfully submitted.

Gregory Charles Hardig Sr.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

August 29, 2022

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

The plan for the day is to report on the condition of the liner in the 3M-North tank.

entry.

In General, this tank lining is in good shape. I found only one repair location on the floor. The rest of the repairs were scattered around the boot; within the first 12” of the wall and out onto the first 24” to 36” on the floor from the wall.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

This is what most of the blisters looked like

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Note: the blisters along the wall.

Also, the liquid residue in the location closest to the wall.

This was the only location noted on the floor.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

All in, there measures about 125 to 135’ of repairs need at the parameter around the inside base of the tank. The cleaning crew would do well to re-clean the parameter up 12-18” on the wall and out 3 to 4’ out from the wall the entire parameter. They should use the cleaning chemicals the remove the hydrocarbon and the vacuum to remove the rinse liquid.

As a point of record, it is noted that some early signs of re-bar corrosion are visible in the ceiling. There is no visual delamination of the concrete seen with the lighting on-hand. This is perhaps a factor of ware from the original 2000 construction. This should be looked at and further documented in future inspections.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

September 7, 2022

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022 specifically considering the additional cleaning in the area located at the parameter of the tank at the wall/floor joint.

The Blue arrow indicates the location I will focus the inspection.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

Close investigation found a filler material that had the look and feel of Styrofoam. To further investigate what this material was, I used a strong solvent (MEK, Acetone, & MIBK) to do a solvent rub. The end in mind was to determine what is the make-up of the white semi-soft granular material was.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

The material softened when rubbed with the solvent blend.

When we consider how this material was placed, it was likely that it was used as a form of backer to fill a void before repairs to the “boot” part of the liner was repaired.

It is noted that the “Boot” is the rubber lining installed over the original concrete/Gunnite when the tank was first constructed. The original boot was about 12-18” up the wall and 10-15” out onto the tank bottom.

The blue lines indicate the general location of the original boot.

The white is the exposed backer material.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

This photo shows several issues:

1) The blue lined are where the boot had been previously cut & and removed.

2) The black material located in between the blue lines is thin, less than 25/mils

3) The material was in many cases found to be black granular beads that looked like it was

“dry-spray” when it was applied and not well adhered.

4) You can see that where I inserted the probe into the already split liner, the white backer material was underneath it.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

You can see more closely the granular profile (Dry spray) of the black lining material that is split.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

You can see again the common condition of the parameter around the bottom of the tank wall/floor interface.

Summary:

After the contractor completed the final cleaning and vacuumed the interior tank chime, the damage was found to be mor extensive than originally found. I would estimate that 85% to 95% of this area is damaged.

I believe that based upon the solvent wipe that we conducted, there is a high likely hood that the tank cargo is penetrating through the liner in this area and needs urgent repair.

This will require a change in the scope of work already under contract in this tank.

The recommended change should be this:

First complete repairs as planned on the main floor of the tank. Then, vacuum up any remaining water liquid from the floor surface. Then begin repairs to the tank wall/floor interface.

The new scope I n the tank/wall interface is:

Abrasive blast the split in the boot. This would be to 12” out on the tank floor and up 6-8” up the wall. Ion locations where there are blisters on the floor within the blast zone on the floor; these too will be abrasive blasted. After the abrasive is removed and cleaned the next steps can take place.

Then the area should be solvent wiped with alcohol and conditioned with the CIM Surface conditioner, and then a layer of CIM trowel-grade places at 30+ mils thickness. While the first lift of CIM is wet, a nylon/composite reinforcing scrim-cloth of a with greater than the cut in the boot (that is 4-6” wide) then covered with 1 to 2 additional lifts of the CIM for an additional 40 to 60/mils of CIM.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Lining Inspection Report 8-29-2022

This will eliminate the risk of the tank cargo leaking into the ground. In the 3-year cycle of inspection, this area should be again inspected for change after the repairs.

As a point of record, it is noted that some early signs of re-bar corrosion are visible in the ceiling. With further discussion with the maintenance management, it is found that in one of the locations there is an organic filter that pumps hydrogen-sulfide back into the tank. At the point of entry, there is greater concrete degradation to the entry, and the ceiling around the location of point of entry. There is no visual delamination of the concrete seen with the lighting on-hand.

This is perhaps a factor of ware from the original 2000 construction. This should be looked at and further documented in future inspections.

Respectfully submitted.

Gregory Charles Hardig Sr.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

September 9, 2022

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000 after abrasive blast cleaning in the area located at the parameter of the tank at the wall/floor joint.

Environmentals were recorded. Air quality was good with 20.8/oxygen.

The blast cleaning was progressing and exposed some areas where the boot had been repaired in the past. Some additional work will be done once the abrasive is removed. This will include cutting away loose rubber/materials, and additional braided wire wheels to rough up the area before the conditioner and CIM application begins.

This is a spot located on the wall just up from the floor.

Repairs will move forward on the perimeter of the wall.

Waste entry through the floor.

In the morning before blasting started, the entire floor was vacuumed where any liquid was left presumed from the surface prep process.

By midafternoon, some of the freshly repaired spots on the main floor were bubbling and actively leaking a liquid thought to be water.

In the time of about 5/hrs one spot leaked about 8 to 10/gallons of liquid through the floor

After the contractor completed the blast cleaning and vacuumed the interior tank chime parameter, and the additional cutting and grinding are complete, they will apply 1 lift of CIM and embed a nylon/composite scrim-cloth into it while it is wet.

Then apply 60/mills additional material on top of the scrim-cloth.

The liquid entering the tank through the floor may be a result of poor exterior parameter draining. If the parameter draining could be resolved, then this issue would likely go away.

Respectfully submitted.

Gregory Charles Hardig Sr.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-16-2023

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

Exterior Dome Inspection Report

May 16, 2023

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-16-2023

The plan for the day is to report on the condition of exterior tank-dome of the 3M-North tank.

With JSA and a meaningful discussion on safety began inspection of the exterior dome.

In General, this tank lining is in good shape.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-16-2023

The lighter color is where the workers had already started cleaning the surface using a 2700/psi potable water pressure washer and employing a 15” rotating disc.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-16-2023

Some hairline cracks were recorded. I will perform a penetration test after the cleaning is completed. It is noted that the specified coating will bridge gaps/cracks up to 1/16th of an inch.

So no additional crack chasing or reinforcing will be required.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-16-2023

Baffles were taken back to the shop to be cleaned and surface-prepped. Then a bonding primer was applied.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-16-2023

Material was spray applied and back rolled.

The surface preparation process is well under way. The workers are doing a great job at cleaning and preparing the surface making it ready for coating.

Respectfully submitted.

Gregory Charles Hardig Sr.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

May 18, 2023

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

With JSA and a meaningful discussion on safety began inspection of the exterior dome as the cleaning and surface prep is complete. The protective coating process begins.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

Material batch numbers were recorded.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

Material was mixed for 3/min before use.

Spray tip was a 519

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

The air operated airless pump was a 30-1 ratio set at 80/psi. this develops 2400/psi at the spray tip.

After the spray pattern was set, I checked the Wet Film Thickness (WFT)

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

10.0 to 12.0/mils WFT were recorded.

The workers back brushed the cracks and any protrusions.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

After spray application, the material was back rolled into the surface.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

The workers worked there way around the tank.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-18-2023

3/5th of the tank was complete with the first lift by days end.

The surface preparation process went well. The workers are doing a great job at spraying, back brushing, and back rolling the material into the surface.

Respectfully submitted.

Gregory Charles Hardig Sr.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and

1 Form: GDH-54 Rev.: 031320

Cincinnati / Northern Kentucky International Airport

(CVG)

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

May 22, 2023

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

2 Form: GDH-54

With JSA and a meaningful discussion on safety began inspection of the exterior dome as the cleaning and surface prep is complete. The protective coating process begins.

3 Form: GDH-54

4 Form: GDH-54

5 Form: GDH-54

The air operated airless pump was a 30-1 ratio set at 80/psi. this develops 2400/psi at the spray tip.

6 Form: GDH-54

The workers worked their way around the tank.

They completed the final 2/5th of the tank first lift before starting on the second lift.

7 Form: GDH-54

Batch numbers were again recorded as second lift begins.

8 Form: GDH-54

The spray pattern was set and wet film thickness was checked.

9 Form: GDH-54

The wind was 15-20/mph, air 77°F, and surface 86°F.

The workers reduced the size of the pattern as they worked across the tank as the material was drying fast.

By days end, just about half of the tank had the second lift on it.

10 Form: GDH-54

It is noted that the TDS was consulted, and application temps can be up to 90°F. We were below that temp, yet depending upon what angle the freshly painted surface was viewed, some lap marks could be seen.

The surface preparation process went well. The workers are doing a great job at spraying, back brushing, and back rolling the material into the surface. We put in a call to the material supplier to consult on the lap marks.

11 Form: GDH-54

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and recommendations are subject to change and the engineer/inspector assumes no liability for its use or outcome as contained in this report.

12 Form: GDH-54

TECHNICAL DATA WRT-04

ZINSSER® WATERTITE®

FLEXIBLE PRIMER & FINISH

DESCRIPTION AND USES

Zinsser® WaterTite® Flexible Primer & Finish is a high build, moisture and mildew resistant, low VOC coating designed with elastomeric qualities to expand and contract to fill hairline cracks (1/16” or less) in vertical concrete and masonry surfaces. These products are suitable for stucco, brick, tilt-up walls, pre-cast or poured-in-place concrete as well as CMU and cement block. Flexible Primer & Finish provides excellent resistance to high alkali surfaces (pH levels up to 13.8). These coatings can be applied to new properly cast concrete and stucco within 72 hours. They block efflorescence (salt build-up) from passing through the topcoat and will not degrade when applied to concrete surfaces with a pH of up to 13.8.

Durable and weather resistant, WaterTite Flexible Primer & Finish passes the ASTM D6904-03 Standard Practice for Resistance to Wind Driven Rain for Exterior Coatings Applied on Masonry. Based on ASTM 1737-85 & D522 Method of Test for Elongation Testing, Flexible Primer & Finish can stretch up to 160% and does not yellow or chalk.

Additionally, based on ASTM 1653 Method of Water Permeability, Flexible Primer & Finish has a perm rating of

15.5. This product can be used as a primer or primer and

topcoat. If used as a primer, it should be topcoated with a high quality oil or latex-base finish.

MPI #10 Certified (Refer to the MPI website for the most current listing of MPI certified products.)

PERFORMANCE CHARACTERISTICS

• Designed with elastomeric qualities

• Protects from wind driven rain

• Mildew resistant finish

• Withstand high pH up to 13.8

• Blocks efflorescence, does not chalk or yellow

• Tintable

• Low VOC

PRODUCT APPLICATION

SURFACE PREPARATION

Surfaces must be clean, dry, and sound. New concrete must cure for at least 3 days prior to coating. Surfaces must be free of dirt, efflorescence, mold, algae, sandy mortar, release agents or any material that could compromise the coating adhesion. Splash water on the surface to test for the presence of form sealers or release agents. If the surface turns dark, WaterTite Flexible Primer & Finish can be applied. If the water beads up or does not turn dark, the surface must be chemically or mechanically cleaned and retested before proceeding. Wash, vacuum, scrape, wire brush, power wash or mechanically abrade to clean the surface.

Cast concrete, concrete block and mortar joints must be hard and firm, not loose, sandy or soft. Scrape the surface with a flat screwdriver to test for soundness. If soft or sandy, contact a professional contractor before proceeding. Use mechanical means (hand or power tools) to open holes (bug-holes) caused by air bubbles in cast-in-place concrete to allow coating to fully penetrate. Replace missing mortar and fill non-dynamic cracks and bug-holes deeper than 1/16” with WaterTite Hydraulic Cement or equivalent product.

WaterTite Hydraulic Cement must be fully dry before painting can begin. Follow the manufacturer’s recommended dry time guidelines. Flexible Primer & Finish can be applied over previously painted surfaces. However, waterproofing ability is dependent upon the integrity and moisture resistance of the previous coating.

WARNING! If you scrape, sand or remove old paint, you may release lead dust. LEAD IS TOXIC. EXPOSURE TO

LEAD DUST CAN CAUSE SERIOUS ILLNESS, SUCH AS

BRAIN DAMAGE, ESPECIALLY IN CHILDREN.

PREGNANT WOMEN SHOULD ALSO AVOID EXPOSURE.

Wear a NIOSH-Approved respirator to control lead exposure. Clean up carefully with a HEPA vacuum and a wet mop. Before you start, find out how to protect yourself and your family by contacting the National Lead Information Hotline at 1-800-424-LEAD or log on to www.epa.gov/lead.

PRODUCTS

SKU DESCRIPTION

5061 1 Gallon (White Tint Base) 5063 5 Gallon (White Tint Base) 269342 1 Gallon (Deep Tint Base) 269343 5 Gallon (Deep Tint Base) http://www.epa.gov/lead

13 Form: GDH-54

PRODUCT APPLICATION (cont.)

APPLICATION

Stir or mechanically mix thoroughly before and during application. DO NOT THIN. Apply only when air, material, and surface temperatures are between 50-90ºF (10-32ºC) and the relative humidity is or less than 85%. To form a continuous, pinhole free coating, apply evenly and thoroughly. To use as a primer, apply one coat. Apply two coats to use as a primer and finish. Apply using a high quality, synthetic 3 to 4 inch brush or a ¾” nap roller. If rolled, back brush the first coat to work the coating into the concrete pores. It is more important to work the first coat into the surface than for it to hide the substrate. Product should be applied at a WFT of 10-12 mils (5-6 mils dry). Use a wet film gauge to measure properly. Depending upon the porosity of the substrate, apply the first coat at a rate of 100- 135 square feet per gallon. Apply the second coat at a rate to complete the project. Flexible Primer & Finish can be applied with an airless sprayer (tip size 0.017-0.021 with 2400-2900 psi). After spraying, back roll to ensure uniform coverage.

COLOR/TINTING

The White Tint Base can be tinted with up to 4 ounces of universal colorant per gallon. The Deep Tint Base can be tinted with up to 8 ounces of universal colorant per gallon.

Both products produce a smooth, flat finish. The Deep Tint Base must be tinted before use. Mix on a mechanical shaker for 7-9 minutes or use a drill motor. Multiple containers of tinted paint should be boxed (intermixed) to ensure color uniformity.

DRY AND RECOAT

Dry and recoat times are based on 70°F and 50% relative humidity. Lower temperatures and higher humidity will increase dry time. Flexible Primer & Finish will dry to the touch in 4 hours. Allow the first coat to dry a minimum of 2 hours before applying the second coat. Apply the second coat only after the first coat has completely dried. Full cure will be reached in 7 days (slightly longer if tinted). If used outside, protect from rain for 8 hours after application.

CLEAN UP

Clean hands and tools with soapy water. Drips and runs should be removed immediately. Once dry, drips and runs can be removed by sanding or stripping.

LIMITATIONS

Flexible Primer & Finish does not hold back hydrostatic water pressure. It is NOT recommended for use in swimming pools or use in contact with potable water. It is NOT recommended for use on horizontal surfaces (i.e.

subfloors). Do not use on glazed or non-porous surfaces.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-22-2023

PHYSICAL PROPERTIES

WHITE TINT BASE DEEP TINT BASE

Resin Type Acrylic Latex Acrylic Latex

Pigment Type Titanium Dioxide, Aluminum Silicate Titanium Dioxide, Aluminum Silicate

Solvents Glycol Ethers, Texanol, Water Glycol Ethers, Texanol, Water

Weight Per Gallon 12.7 lbs. 12.1 lbs.

Per Liter 1.52 kg 1.45 kg

Solids By Weight 67.8% 64.9%

By Volume 51.1% 49.0%

Volatile Organic Compounds <50 g/l (0.42 lbs./gal.) <50 g/l (0.42 lbs./gal.)

Recommended Dry Film Thickness (DFT) per Coat 5.0-6.0 mils (125-150µ) per coat 5.0-6.0 mils (125-150µ) per coat

Wet Film to Achieve DFT (Unthinned material) 10.0-12.0 mils (250-300µ) per coat 10.0-12.0 mils (250-300µ) per coat

Theoretical Coverage at 1 mil DFT (25µ)

820 sq.ft./gal.

(20.2 m2/l)

787 sq.ft./gal.

(19.4 m2/l)

Practical Coverage at Recommended DFT (assume 15% material loss)

100-135 sq.ft./gal.

(2.46-3.32 m2/l)

Coverage may change depending on porosity and application method.

100-135 sq.ft./gal.

(2.46-3.32 m2/l)

Coverage may change depending on porosity and application method

Dry Times at 70-80°F (21-27ºC) and 50% Relative Humidity

Touch 4 hours 4 hours

Handle 8 hours 8 hours

Recoat 2 hours 2 hours

Full Cure 7 days 7 days

Shelf Life 3 years 3 years

Flash Point >200ºF (93ºC) >200ºF (93ºC)

Safety Information For additional information, see SDS

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

May 23, 2023

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

With JSA and a meaningful discussion on safety began inspection of the exterior dome as the cleaning and

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

The air operated airless pump was a 30-1 ratio set at 80/psi. this develops 2400/psi at the spray tip.

The workers are now just spray applying the second lift.

Surface temps are being recorded, 69°F

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

By 1130/hrs, the wind was 5-10/mph, air 78°F, and surface 92°F.

The workers reduced the size of the pattern as they worked across the tank as the material was drying fast.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

At 12: 00/hrs the team broke down for lunch.

At 12:30/hrs the air temp had risen to 104°F, & the surface to 92°F

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-23-2023

The contractor elected to re-spray apply the last section that was coated on 5-22-23 to eliminate the look of lap-marks. All the remaining second lift will be sprayed only.

The team from R Houston did a walk around of the work completed for the day and determined that because of the heat of the day at this time, it was best to stop applying the second lift. The coating manufacturer representative was on site and agreed with the call.

Further applications will be done in the morning, or on second shift.

Attached to this report is the environmental data logging for today.

Respectfully submitted.

Gregory Charles Hardig Sr.

NACE Certified Coating Inspector Level-3 Cert #3494 My commission expires April 2025

Note: This report was assembled using the best means available in the current conditions. While we have applied our best experience and academic research to our conclusions, field conditions and recommendations are subject to change and the engineer/inspector assumes no liability for its use or outcome as contained in this report.

Powered by DeFelsko 1

B1 Created: 2023-05-23 09:11:27

PosiTector Body S/N: 773213 Probe Type: PosiTector DPM Probe S/N: 444194

Summary # x̅ σ ↓̲ ↑̅

RH (%) 123 41.34 5.96 33.2 51.1

Ta (°F) 123 80.23 5.55 70.0 87.5 Ts (°F) 123 75.38 3.94 66.6 82.3 Td (°F) 123 54.29 1.55 50.9 60.6 Ts-Td (°F) 123 21.09 2.85 15.5 26.1

Readings # RH Ta Ts Td Ts-Td Time

(%) (°F) (°F) (°F) (°F) 2023-05-23

1 50.7 70.3 67.1 51.2 15.9 09:12:49 2 50.8 70.0 67.6 50.9 16.7 09:13:49 3 50.8 70.0 66.6 51.0 15.6 09:14:49 4 51.0 70.0 67.8 51.1 16.7 09:15:49 5 50.7 70.2 68.0 51.1 16.9 09:16:49 6 50.2 70.8 68.7 51.3 17.4 09:17:49 7 51.1 71.3 69.9 52.3 17.6 09:18:49 8 50.1 71.5 69.5 51.9 17.6 09:19:49 9 51.1 71.9 70.3 52.9 17.4 09:20:49

10 50.1 71.9 67.8 52.3 15.5 09:21:49 11 50.9 72.1 70.1 53.0 17.1 09:22:49 12 48.9 72.4 70.2 52.1 18.1 09:23:49 13 50.5 72.4 70.4 53.0 17.4 09:24:49 14 48.7 72.4 70.1 52.0 18.1 09:25:49 15 49.8 72.1 70.3 52.3 18.0 09:26:49 16 50.3 72.2 70.1 52.7 17.4 09:27:49 17 50.4 71.8 69.7 52.4 17.3 09:28:49 18 50.5 72.5 70.4 53.1 17.3 09:29:49 19 51.1 72.6 70.6 53.5 17.1 09:30:49 20 48.2 73.0 71.0 52.3 18.7 09:31:49 21 48.5 73.1 71.0 52.5 18.5 09:32:49 22 50.4 73.4 71.0 53.9 17.1 09:33:49 23 50.5 73.5 71.3 54.0 17.3 09:34:49 24 49.6 73.7 71.3 53.7 17.6 09:35:49 25 49.3 73.7 71.2 53.5 17.7 09:36:49

Powered by DeFelsko 2

B1 Readings # RH Ta Ts Td Ts-Td Time

(%) (°F) (°F) (°F) (°F) 2023-05-23

26 47.5 74.0 71.3 52.8 18.5 09:37:49 27 46.1 74.3 70.5 52.3 18.2 09:38:49 28 47.6 74.7 72.2 53.5 18.7 09:39:49 29 48.5 74.5 71.4 53.8 17.6 09:40:49 30 47.6 74.6 72.7 53.4 19.3 09:41:49 31 48.2 74.7 73.0 53.8 19.2 09:42:49 32 46.8 75.8 74.2 54.0 20.2 09:43:49 33 46.7 76.2 73.6 54.4 19.2 09:44:49 34 46.5 76.5 73.9 54.5 19.4 09:45:49 35 47.2 75.9 73.6 54.4 19.2 09:46:49 36 45.1 75.9 72.6 53.1 19.5 09:47:49 37 48.2 75.4 72.4 54.5 17.9 09:48:49 38 45.5 75.8 72.1 53.3 18.8 09:49:49 39 44.2 76.4 71.2 53.1 18.1 09:50:49 40 44.6 75.8 71.1 52.7 18.4 09:51:49 41 46.4 76.0 72.8 53.9 18.9 09:52:49 42 47.1 76.8 73.9 55.1 18.8 09:53:49 43 46.0 77.7 72.9 55.3 17.6 09:54:49 44 45.3 77.9 75.1 55.1 20.0 09:55:49 45 42.0 77.6 73.0 52.7 20.3 09:56:49 46 43.3 77.0 72.9 53.0 19.9 09:57:49 47 41.9 78.0 74.2 53.0 21.2 09:58:49 48 41.6 78.7 75.5 53.5 22.0 09:59:49 49 42.5 79.6 75.8 54.8 21.0 10:00:49 50 41.6 80.2 76.6 54.8 21.8 10:01:49 51 39.7 79.6 75.0 53.0 22.0 10:02:49 52 40.0 79.7 74.3 53.2 21.1 10:03:49 53 39.6 80.3 75.5 53.6 21.9 10:04:49 54 39.2 80.5 74.6 53.4 21.2 10:05:49 55 40.8 79.1 75.3 53.3 22.0 10:06:49 56 39.2 80.4 75.2 53.3 21.9 10:07:49 57 39.6 81.5 77.5 54.5 23.0 10:08:49 58 40.2 81.1 78.0 54.6 23.4 10:09:49 59 38.3 81.9 76.9 54.0 22.9 10:10:49 60 38.1 81.7 77.7 53.7 24.0 10:11:49 61 38.9 82.5 78.7 55.0 23.7 10:12:49 62 38.6 82.1 75.9 54.4 21.5 10:13:49 63 38.4 81.4 76.2 53.6 22.6 10:14:49 64 37.1 82.7 76.3 53.9 22.4 10:15:49 65 38.0 82.5 75.6 54.3 21.3 10:16:49

Powered by DeFelsko 3

# RH Ta Ts Td Ts-Td Time

(%) (°F) (°F) (°F) (°F) 2023-05-23

66 40.5 83.2 78.7 56.7 22.0 10:17:49 67 39.8 83.3 74.8 56.3 18.5 10:18:49 68 39.0 82.6 77.2 55.1 22.1 10:19:49 69 40.6 83.1 78.8 56.6 22.2 10:20:49 70 38.2 83.8 78.1 55.6 22.5 10:21:49 71 36.9 83.6 78.1 54.5 23.6 10:22:49 72 37.1 84.8 78.8 55.7 23.1 10:23:49 73 36.3 83.6 76.5 54.0 22.5 10:24:49 74 37.5 83.9 77.6 55.3 22.3 10:25:49 75 38.7 82.9 74.8 55.2 19.6 10:26:49 76 38.4 83.4 74.3 55.4 18.9 10:27:49 77 37.4 83.4 74.8 54.7 20.1 10:28:49 78 39.1 82.8 74.2 55.3 18.9 10:29:49 79 39.4 82.7 75.6 55.4 20.2 10:30:49 80 41.1 84.1 79.1 57.9 21.2 10:31:49 81 38.2 83.9 78.2 55.7 22.5 10:32:49 82 37.0 83.2 77.1 54.3 22.8 10:33:49 83 36.9 84.6 78.6 55.4 23.2 10:34:49 84 36.2 84.3 77.3 54.6 22.7 10:35:49 85 38.3 83.6 75.2 55.5 19.7 10:36:49 86 37.0 84.9 80.0 55.7 24.3 10:37:49 87 38.1 85.5 80.7 57.1 23.6 10:38:49 88 36.3 85.7 81.6 55.9 25.7 10:39:49 89 37.5 84.9 78.0 56.2 21.8 10:40:49 90 34.7 86.2 80.4 55.1 25.3 10:41:49 91 37.5 86.1 80.5 57.2 23.3 10:42:49 92 34.5 85.8 78.2 54.6 23.6 10:43:49 93 34.9 85.6 79.1 54.8 24.3 10:44:49 94 36.2 86.0 82.0 56.1 25.9 10:45:49 95 34.2 86.1 78.2 54.6 23.6 10:46:49 96 33.5 85.8 78.1 53.8 24.3 10:47:49 97 34.1 85.4 77.4 53.9 23.5 10:48:49 98 34.5 86.7 79.5 55.4 24.1 10:49:49 99 34.2 86.2 80.1 54.7 25.4 10:50:49

100 33.6 86.9 79.3 54.8 24.5 10:51:49 101 33.6 86.7 79.0 54.6 24.4 10:52:49 102 33.5 87.0 80.2 54.8 25.4 10:53:49 103 35.5 87.2 81.9 56.7 25.2 10:54:49 104 33.2 87.0 80.5 54.5 26.0 10:55:49 105 34.1 86.0 77.3 54.4 22.9 10:56:49

Powered by DeFelsko 4

# RH Ta Ts Td Ts-Td Time

(%) (°F) (°F) (°F) (°F) 2023-05-23

106 33.4 86.4 79.1 54.3 24.8 10:57:49 107 34.6 87.5 82.3 56.2 26.1 10:58:49 108 35.5 85.6 80.3 55.2 25.1 10:59:49 109 37.7 86.9 80.7 58.0 22.7 11:00:49 110 34.7 85.4 78.9 54.4 24.5 11:01:49 111 35.4 85.1 79.2 54.7 24.5 11:02:49 112 36.0 85.9 78.4 55.8 22.6 11:03:49 113 33.8 87.2 78.1 55.3 22.8 11:04:49 114 34.7 86.2 77.9 55.1 22.8 11:05:49 115 35.2 85.1 79.5 54.5 25.0 11:06:49 116 34.7 86.1 77.7 55.0 22.7 11:07:49 117 35.1 86.1 78.8 55.3 23.5 11:08:49 118 34.3 86.0 76.7 54.6 22.1 11:09:49 119 35.6 86.5 80.9 56.1 24.8 11:10:49 120 36.1 85.7 81.2 55.7 25.5 11:11:49 121 35.6 85.2 79.8 54.9 24.9 11:12:49 122 35.9 86.0 80.4 55.8 24.6 11:13:49 123 41.4 86.9 79.3 60.6 18.7 11:14:59

Powered by DeFelsko 5

Powered by DeFelsko 6

Powered by DeFelsko 7

B2 Created: 2023-05-23 11:18:53

PosiTector Body S/N: 773213 Probe Type: PosiTector DPM Probe S/N: 444194

Summary # x̅ σ ↓̲ ↑̅

RH (%) 34 31.28 4.53 20.7 37.1

Ta (°F) 34 90.97 5.38 85.8 104.2 Ts (°F) 34 83.52 6.06 74.9 96.1 Td (°F) 34 56.00 1.62 54.1 60.2 Ts-Td (°F) 34 27.52 5.96 19.7 41.0

Readings # RH Ta Ts Td Ts-Td Time

(%) (°F) (°F) (°F) (°F) 2023-05-23

1 35.8 88.4 77.6 57.9 19.7 11:19:53 2 33.1 88.1 82.3 55.4 26.9 11:20:53 3 34.0 87.8 79.6 55.9 23.7 11:21:53 4 33.3 87.0 81.8 54.6 27.2 11:22:53 5 34.0 85.8 80.7 54.2 26.5 11:23:53 6 33.7 86.6 81.8 54.6 27.2 11:24:53 7 34.1 86.3 79.5 54.7 24.8 11:25:53 8 33.4 87.2 79.7 54.9 24.8 11:26:53 9 34.4 86.9 77.2 55.4 21.8 11:27:53

10 36.7 88.1 80.4 58.4 22.0 11:28:53 11 31.5 88.5 82.3 54.4 27.9 11:29:53 12 31.5 88.8 83.9 54.7 29.2 11:30:53 13 34.9 87.6 79.9 56.5 23.4 11:31:53 14 37.1 88.3 81.8 58.8 23.0 11:32:53 15 32.9 88.7 82.2 55.8 26.4 11:33:53 16 32.7 89.0 83.1 55.8 27.3 11:34:53 17 33.0 89.2 77.3 56.3 21.0 11:35:53 18 33.1 88.1 76.8 55.5 21.3 11:36:53 19 33.5 87.3 75.4 55.0 20.4 11:37:53 20 34.1 86.3 74.9 54.7 20.2 11:38:53 21 33.1 87.8 76.9 55.2 21.7 11:39:53 22 33.7 88.0 81.1 55.8 25.3 11:40:53 23 33.9 87.3 78.8 55.4 23.4 11:41:53 24 29.9 92.0 89.4 56.0 33.4 11:48:18 25 33.1 92.6 88.7 59.4 29.3 11:53:18

B2 Readings # RH Ta Ts Td Ts-Td Time

(%) (°F) (°F) (°F) (°F) 2023-05-23

26 28.3 94.8 88.1 56.9 31.2 11:58:18 27 24.9 97.4 91.3 55.5 35.8 12:03:18 28 31.8 93.4 86.6 59.0 27.6 12:08:18 29 23.3 99.2 92.9 55.2 37.7 12:13:18 30 26.5 98.3 93.2 58.0 35.2 12:18:18 31 22.6 99.6 92.6 54.7 37.9 12:23:18 32 20.9 101.4 93.6 54.1 39.5 12:28:18 33 20.7 103.0 96.1 55.1 41.0 12:33:18 34 24.0 104.2 92.2 60.2 32.0 12:38:18

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

Kenton County Airport Board 3-Million gallon Below-ground Concrete Tank

AKA: 3-mil. North

May 24, 2023

Cincinnati / Northern Kentucky International Airport (CVG) Kenton County Airport Board

P.O. Box 752000

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

With JSA and a meaningful discussion on safety began inspection of the exterior dome as the cleaning and

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

The air operated airless pump was a 30-1 ratio set at 80/psi. this develops 2400/psi at the spray tip.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

At 06:47/hrs the air temp was to 64.8°F, & the surface 64.2°F

The team worked around the dome keeping a wet edge while spraying

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

07:45/hrs the temperature remained the same.

By 07:56 the coating application on the 3M North dome was complete.

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

The workers set up a space to coat the composite manway hatch.

After the area around the manway was masked off and a shelter was placed over the spot, they applied the XIM Primer

Kenton County Airport Board 3-Mil-North Below-ground Concrete Tank Exterior dome Inspection Report 5-24-2023

The contractor elected to re-spray apply the last section that was coated on 5-23-23 to eliminate the look of lap-marks. All the remaining second lift will be sprayed only. The composite manway was masked off and shelter put in place. Then they applied the primer. They plan on applying the topcoat the next day.

All work has been within the manufacturer’s specifications.

Attached to this report is the environmental data…