10-Attachment E - Benton Tank Inspection Report.pdf
PDF 8 MB Posted
- Attached to
- Water Tank Painting Services
- Solicitation number
- RFP #3858
- Issued by
- Riverside County, California
About this file
The document is an inspection report prepared by H2O Solutions, LLC for the Eastern Municipal Water District, focusing on the Benton water storage tank located in California. The comprehensive report, dated January 19, 2024, details a thorough examination of the tank's exterior and interior components using surface-supplied air and a sealed dry suit, in accordance with OSHA, EPA, AWWA, NACE, SSPC, and ADC requirements. The tank is a welded steel structure with a 120-foot diameter, 24-foot height, and a 2,000,000-gallon capacity, though the year of construction is unknown.
The inspection utilized real-time video with live voice narration and still photographs to assess various components, with most elements receiving a "good" to "excellent" rating. Corrosion levels were consistently low (0-5%), with rust grades predominantly at 10 (minimal to no rusting). The report highlights minor observations such as light rust staining, chalking on coating systems, and sediment depths between ½" to 2" in the tank. Specific recommendations were minimal, with only one suggestion to install a mesh screen on the exterior vent to prevent insects or debris from entering the tank. The overall condition of the Benton tank appears to be sound, with no immediate critical maintenance needs identified.
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S
EASTERN MUNICIPAL
WATER DISTRICT
Benton Inspection Report January 19, 2024
Standards The inspection report of this tank was preformed by H2O Solutions, LLC using surface supplied air, totally encapsulated in a sealed dry suit mated to a sealed dry divers hard hat and conducted in accordance with all applicable OSHA, EPA, AWWA,NACE,SSPC and ADC Requirements and recommendations.
The inspection consisted of a visual observation of the tanks exterior and interior components and coating system. The tank was not drained for the inspection and all interior assessment data was recorded using real time video with live voice narration as well as still photographs.
Condition Observations Conditions noted during the inspection are documented in the following pages and are supplemented with color photographs. Condition ratings used to describe the inspection findings are annotated as follows:
Excellent: No deficiencies noted.
Good: Minor deficiencies noted. Item is functioning as designed.
Fair: Major deficiencies noted. Item is in need of repairs to continue functioning as designed.
Poor: Repair or replacement required immediately. Item may no longer function as designed.
Date of Cleaning & Inspection : January 19, 2024 Tank Name : Benton
Water Loss from Cleaning: 25,000 Gallons Diameter : 120’
Construction Type: Welded Steel Height : 24’
Capacity(gal): 2,000,000 Year Built : Unknown
Exterior Wall
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Recommendations
None at this time.
Exterior Wall
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Outlet
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Drain
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Overflow
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Overflow
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Manway
Description
The gasket appeared to be fully intact and the hatch appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Manway
Description
The gasket appeared to be fully intact and the hatch appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Stairway
Description
Appeared to be structurally sound and in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Safety Rail
Description
Appeared to be structurally sound and in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Hatch
Description
Appeared to be in good condition with minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light rust staining present.
Coating Failure
< 5%
Install gasket to prevent insects/debris.
Exterior Hatch Lid
Description
Appeared to be in good working condition with minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light rust staining present.
Coating Failure
< 5%
Install gasket to prevent insects/debris.
Exterior Roof
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Roof
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining and chalking.
Coating Failure
5%
Exterior Vent
Description
Appeared to be in good working condition with minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light rust staining and delamination present.
Coating Failure
< 5%
Exterior Vent Screen
Description
No visible vent screen present during the time of inspection.
Corrosion Present
N/A
Rust Grade
N/A
Coating System
N/A
Coating Failure
N/A
Recommendations
Install mesh screen to prevent insects or debris from entering the water tank.
Interior Sediment
Description
½” – 2” of sediment.
Interior Inlet
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with no visible discrepancies.
Coating Failure
0%
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with no visible discrepancies.
Coating Failure
0%
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with no visible discrepancies.
Coating Failure
0%
Interior Outlet
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with no visible discrepancies.
Coating Failure
0%
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with no visible discrepancies.
Coating Failure
0%
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with no visible discrepancies.
Coating Failure
0%
Interior Drain
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with no visible discrepancies.
Coating Failure
0%
Interior Overflow
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with no visible discrepancies.
Coating Failure
0%
Interior Manway
Description
The gasket appeared to be fully intact and the hatch appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with heavy staining present.
Coating Failure
< 5%
Interior Column Base
Description
Appeared to be structurally sound and in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with staining present.
Coating Failure
< 5%
Interior Column
Description
Appeared to be structurally sound and in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with staining present.
Coating Failure
< 5%
Interior Ceiling
Description
Appeared to be in good condition with minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light rust staining present.
Coating Failure
< 5%
Description
Appeared to be in good condition with minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light rust staining present.
Coating Failure
< 5%
Description
Appeared to be in good condition with minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light rust staining present.
Coating Failure
< 5%
Interior Wall
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with heavy staining present.
Coating Failure
< 5%
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with heavy staining present.
Coating Failure
< 5%
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with heavy staining present.
Coating Failure
< 5%
Interior Floor
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with areas of heavy staining present.
Coating Failure
< 5%
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with areas of heavy staining present.
Coating Failure
< 5%
Description
Appeared to be in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with areas of heavy staining present.
Coating Failure
< 5%
Sediment Depth
½” – 2”
½” – 2” ½” – 2” ½” – 2”
½” – 2”
References
Standard Method of Evaluating Degree of Rusting on Painted Steel Surfaces – SSPC-Vis 2-82 & ASTM D 610-85 (1989)
The graphical representations show examples of area percentages, which may be helpful in rust grading. The use of photographical reference standards requires the following precautions:
v Some finishes are stained by rust. This staining must not be confused with the actual rusting involved.
v Accumulated dirt or other material may make accurate determination of the degree of rusting difficult.
v Certain types of deposited dirt that contain iron or iron compounds may cause surface discoloration that should not be mistaken for corrosion.
v It must be realized that failure may vary over a given area and discretion must therefore be used in applying these reference standards.
v In evaluating surfaces, consideration shall be given to the color of the finish coating, since failures will be more apparent on a finish that shows color contrast with rust, such as white, than on a similar color, such as iron oxide finish.
v The photographic reference standards are not required for use of the rust-grade scale since the scale is based upon the percent of the area rusted and any method of assessing area rusted may be used to determine the rust grade.
Rust Grades A
Description Graphical Representation
10 No rusting or less than 0.01% of surface rusted Unnecessary
9 Minute rusting less than 0.03% of surface rusted
8B Few isolated rust spots less than 0.1% of surface rusted
7 Less than 0.3% of surface rusted
6C Extensive rust spots but less than 1% of surface rusted
5 Rusting to the extent of 3% of surface rusted
4D Rusting to the extent of 10% of surface rusted
3E Approximately on sixth of the surface rusted 16%
2 Approximately one third of the surface rusted 33%
1 Approximately one half of the surface rusted 50%
A Similar to European Scale of Degree of rusting for Anti-Corrosive Paints (1961) (Black & White)
B Corresponds to SSPC Initial Surface Conditions E (0 - 0.1%) and BISRA (British Iron and Steel Research Association) 0.1%
C Corresponds to SSPC Initial Surface Conditions F (0.1%-1%) and BISRA 1%
D Corresponds to SSPC Initial Surface Conditions G (1 - 10%)
E Rust grades below 4 are of no practical importance in grading performance of paints
F Corresponds to SSPC Initial Surface Condition H (50 - 100%)
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