Dig_2.pdf
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- Attached to
- Tank Inspections & Repairs & On-Call Services
- Solicitation number
- 26-031-ITB
- Issued by
- Bell County, Kentucky
About this file
This file contains inspection reports prepared by Corrosion Protection Resources LLC for the Kenton County Airport Board regarding repairs and waterproofing of a 2-million gallon above-ground concrete digester located in Hebron, Kentucky at Cincinnati/Northern Kentucky International Airport (CVG). The inspection reports document two phases of work: a temporary repair conducted on October 27, 2023, and a comprehensive repair and waterproofing project completed in June 2024. The temporary repair involved cleaning and sealing a crack in the wall cap using polysulfide elastomeric sealant. The permanent repair phase, conducted June 18-20, 2024, included lowering scaffolding into the tank, washing and abrasive blasting of the cap and interior walls where cracks were identified, grinding out cracks with a diamond wheel, sealing three 3/8-inch diameter holes found on the cap's south side, applying CIM EMT Epoxy primer, and waterproofing with CIM 1000 pre-mix coating applied by brush with wet film thickness recorded at 15-20 mils. Work was transitioned to night shift to optimize coating application and curing conditions.
The reports were commissioned by Scott Thacker, Sr. Manager Environmental Operations at CVG, and prepared by Gregory Charles Hardig Sr., a NACE Certified Coating Inspector Level-3 (Certification #3494, expiring April 2025) from Corrosion Protection Resources LLC. Materials were mixed in small batches with batch numbers recorded for quality control purposes. The work addressed structural integrity concerns including interior wall cracks extending from the cap downward and exterior surface deterioration requiring protective waterproofing. Specific attention was given to the ladder area crack and the three holes sealed in the cap. The reports indicate this work was part of ongoing maintenance at the facility to prevent water infiltration and corrosion of the concrete digester structure.
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Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
Cincinnati / Northern Kentucky International Airport
(CVG)
Kenton County Airport Board 2-Million gallon Above-ground Concrete
Digester # 2 Hebron KY 41048
Wall Cap Crack Repair Waterproofing and coating
Inspection Report
June 25, 2024
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 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
6-18-2024 General:
The plan is to repair on the crack in the wall cap and down the inside of the wall, waterproof the cap and crack area, and to wash and waterproof the exterior surfaces on #2 Digester 2-Mil Above-ground tank.
With JSA and a meaningful discussion on safety complete, the crew began lowering scaffolding down into the tank. Two towers were setup.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
The washing equipment was set up and washing began.
6-19-2024 The abrasive blast equipment was set up and blasting took place on the cap and inside of the walls where the cracks were noted.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
The crack on the cap was also ground out with a diamond wheel.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
6-20-2024 the crew moved to night shift to give the coatings better conditions for application and cure.
The crew masked off the exterior of the cap before coating application began.
A mix station was set up and batch numbers were recorded.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
CIM EMT Epoxy primer was used on the cap before application of the CIM 1000 pre-mix Waterproofing
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
Material was mixed in small batches and applied using a brush. WFT was recorded at 15-20/mils/WFT were recorded.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
It is noted that there were 3 holes about 3/8th” in dia. Located in the cap on the south side of the tank. The crew sealed them. After cure of the primer, the CIM 1000 was mixed and applied by brush.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
Extra attention was given to the holes in the cap.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-
Also the crack near the ladder area.
Summary:
The crack was cleaned & blasted, primed and filler and waterproofing applied.
The cap was blasted and waterproofed ready to receive top coating.
The exterior walls were washed and ready to receive waterproofing.
Please feel free to reach out with any questions.
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.
Corrosion Protection Resources LLC. All rights reserved www.cprcoatings.com http://www.cprcoatings.com/
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall Cap Crack Repair Inspection Report 10-27-2023
Cincinnati / Northern Kentucky International Airport
(CVG)
Kenton County Airport Board 2-Million gallon Above-ground Concrete
Digester # 2 Hebron KY 41048
Wall Cap Crack Repair Inspection Report
October 27, 2023
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 2-Mil Above-ground Digester # 2 Wall Cap Crack Repair Inspection Report 10-27-2023
General:
The plan for the day is to Complete a temporary repair on the crack in the wall cap on #2 Digester 2-Mil Above-ground tank.
With JSA and a meaningful discussion on safety complete, we began scraping the crack area. All work will be done off the stairs mounted to the outside of the wall around the crack.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall Cap Crack Repair Inspection Report 10-27-2023
A Polysulfide elastomeric sealant will be used to make the seal.
Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall Cap Crack Repair Inspection Report 10-27-2023
Summary:
The crack was cleaned, solvent wiped, and sealant applied. This will stabilize the area till more long term repairs can be completed in the spring.
Please feel free to reach out with any questions.
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.
Corrosion Protection Resources LLC. All rights reserved www.cprcoatings.com http://www.cprcoatings.com/
| Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall & cap crack Repair & Waterproofing Inspection Report 6-24-2024 |
| Kenton County Airport Board 2-Mil Above-ground Digester # 2 Wall cap crack Repair Inspection Report 10-27-2023 |
File details come from the government source that posted it. Updated .