2018_Structural_Integrity_150k_Glycol_Holding_Tanks.pdf

30 July 2018

Laura Spaeth Kenton County Airport Board 77 Comair Blvd.

Erlanger, KY

Re: Structural Integrity Inspection - (2) 125,000 Gallon Glycol Holding Tanks

On 24 July 2018, Genesis Environmental Solutions, Inc., (GES) performed an internal visual inspection on (2) 125,000-gallon underground storage tanks. This assessment / inspection was conducted Mr. Robert McChan American Petroleum Institute (API) Inspector Certification #37259, Steel Tank Institute (STI) SP001 Inspector Certification #AC11006.

West Tank (Tank 2B) Upon arrival, the tank hatch was opened, and ventilation was set up. The tank was ventilated and monitored to ensure a safe environment for entry following 29 CFR 1910.146 “Confined Space” entry procedures.

The inspector entered Tank 2B and conducted a visual inspection of the tank structure.

. Tank interior looking West Tank interior looking East

During this inspection, the inspector visually inspected all corner, base and section sealed seams.

. Floor to Side Section Seal Seam Sectional Seal Seam Corner Seal Seam

Once the seams and seam seals were inspected, the inspector closely examined the structural integrity of the concrete structure looking for indications of crack, spalling and any other imperfection that could potentially affect the tanks structural integrity. The walls and ceiling were closely examined with no indications of any deficiencies.

The floor was examined closely. There was some slight cracking throughout the floor surface. Upon close examination, this cracking appeared to be “crazing cracks”. This occurs if the top of the concrete slab dries too quickly, crazing cracks can form. These are very fine surface cracks that resemble spider webs or shattered glass.

Crazing cracks can be unsightly but are not a structural problem.

There is an area located in the Southwest corner of the tank that looks as though it has cracked and some of the concrete has fallen away. It has a crack running through it. Would recommend patching this are prior to use.

Area of concrete missing – slight crack running lengthwise

Other areas of the tank were visually inspected as well. The tank sump pit and piping, ladder rungs and access.

. Tank Sump Pit

Ladder rungs

Overall Evaluation and Recommendations Tank 2B:

- The tank is in good condiction structually;

- There were no major integrity issues discovered;

- The single area in the Southwest corner needs patching;

- All rubber seam seals were intact with no visual defects noted;

East Tank (Tank 2A) After completion of the inspection of Tank 2B, personnel relocated to tank 2A and opened hatch access and ventilation was set up. The tank was ventilated and monitored to ensure a safe environment for entry following 29 CFR 1910.146 “Confined Space” entry procedures.

The inspector entered Tank 2A and immediately discovered that there was still significant water remaining. The water was approximately 3-4” deep in some areas and covered approximately 50% of the floor surface. The tank floor was somewhat elevated in the center. The inspector was able to continue the inspection but was unable to conduct the seal inspection at the tank floor to wall connection and corner connections.

. Water covering tank floor East end

. Water covering tank floor East end Water on tank West end – Sump pit full

. Tank interior looking West Tank interior looking East

During this inspection, the inspector visually inspected all corner, base and section sealed seams that were assessible and not covered in water.

. Floor to Side Section Seal Seam Sectional Seal Seam

Corner Seal Seam

Once the seams and seam seals were inspected, the inspector closely examined the structural integrity of the concrete structure looking for indications of crack, spalling and any other imperfection that could potentially affect the tanks structural integrity. The walls and ceiling were closely examined with no indications of any deficiencies.

The floor was examined closely. There was some slight cracking throughout the floor surface. Upon close examination, this cracking appeared to be “crazing cracks”. This occurs if the top of the concrete slab dries too quickly, crazing cracks can form. These are very fine surface cracks that resemble spider webs or shattered glass.

Crazing cracks can be unsightly but are not a structural problem.

Other areas of the tank were visually inspected as well. The tank sump pit and piping, ladder rungs and access.

Tank Sump Pit – Full

Ladder rungs

Overall Evaluation and Recommendations Tank 2A:

- The tank is in good condiction structually;

- There were no major integrity issues discovered;

- All rubber seam seals were intact with no visual defects noted;

Should you need any additional information, or have any questions regarding this report and attachment, please do not hesitate to contact me.

v/r

Robert L. McChan II General Manager API 653 Inspector / #37259 STI SP001 Inspector / #AC11006 Genesis Environmental Solutions Inc.

Genesis Environmental Solutions, Inc. has evaluated the condition of these tanks based on observations and measurements made by the inspector. While our evaluation accurately describes the condition of the tank at the time of inspection, the tank owner/operator must independently assess the inspection information provided by Genesis and any conclusions reached by the tank owner/operator and any action taken or omitted to be taken are the sole responsibility of the owner/operator. With respect to inspection and testing, Genesis warrants only that the services have been performed in accordance with accepted industry practice.

Genesis Environmental Solutions, Inc. 8422 S. 7 Highway Blue Springs, MO 64014 - Office (816)-229-5900 Fax (816) 229-4495 genesisenviro.com