7-Attachment H - Quail Valley II Tank Inspection Report.pdf
PDF 2 MB Posted
- Attached to
- Water Tank Painting Services
- Solicitation number
- RFP #3858
- Issued by
- Riverside County, California
About this file
This document is an inspection report for the Quail Valley II water storage tank, prepared by H2O Solutions, LLC for the Eastern Municipal Water District on November 29, 2024. The comprehensive inspection was conducted using surface-supplied air and a sealed dry suit, following standards set by OSHA, EPA, AWWA, NACE, SSPC, and ADC. The inspection involved a visual assessment of the tank's exterior and interior components, with data recorded via real-time video and still photographs. The tank is a steel construction with a 110-foot diameter, 32-foot height, and a capacity of 2,180,000 gallons, with an unknown year of construction.
The inspection revealed generally good conditions across various tank components, with minimal corrosion and coating issues. Most exterior and interior elements, including walls, inlet/outlet, drains, overflows, manways, columns, ceiling, and floor, were rated between "Excellent" and "Good" on the condition scale. Specific observations included less than 5% coating failure, rust grades primarily at level 10 (minimal to no rusting), and isolated spots of minor corrosion. The only notable recommendation was to install a gasket on one hatch to prevent insects and debris entry. The sediment depth was consistently measured at ¼ inch throughout the tank, which was not considered problematic. The overall assessment suggests the tank is in sound structural and functional condition with no immediate major repair requirements.
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EASTERN MUNICIPAL WATER
DISTRICT
Quail Valley II Inspection Report November 29, 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 : November 29, 2024 Tank Name : Quail Valley II
Water Loss from Cleaning: 20,000 Gallons Diameter : 110’
Construction Type: Steel Height : 32’
Capacity(gal): 2,180,000 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 chalking and staining.
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 chalking and staining.
Coating Failure
5%
Exterior Inlet/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 light staining.
Coating Failure
< 5%
Exterior Inlet/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 light staining.
Coating Failure
< 5%
Exterior Drain
Description
Appeared to be in good working condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with staining and minor spots of delamination.
Coating Failure
< 5%
Exterior 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 light staining.
Coating Failure
< 5%
Exterior 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 light staining.
Coating Failure
< 5%
Exterior 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 light staining.
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 chalking and staining.
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 chalking and staining.
Coating Failure
5%
Exterior Stairway
Description
Appeared to be structurally sound and in good condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with staining and spots of delamination.
Coating Failure
< 5%
Exterior Safety Rail
Description
Appeared to be structurally sound and in good condition with patches of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with staining and patches of delamination.
Coating Failure
< 5%
Exterior Hatch
Description
Appeared to be in good condition with spots of minor corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with staining and spots of delamination.
Coating Failure
< 5%
Install gasket to prevent insects/debris.
Exterior Hatch Lid
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 light staining.
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 areas of minor delamination and signs of chalking and staining.
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 areas of minor delamination and signs of chalking and staining.
Coating Failure
5%
Exterior Vent
Description
Appeared to be in fair working condition with surface corrosion present.
Corrosion Present
15%
Rust Grade
Coating System
Appeared to be in fair condition with staining and delamination.
Coating Failure
15%
Exterior Vent Screen
Description
Appeared to be fully intact and in good condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
N/A
Coating Failure
N/A
Interior Sediment
Description
¼” of sediment.
Interior Ladder
Description
Appeared to be structurally sound and in good condition with spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with staining and delamination.
Coating Failure
5%
Interior Telemetry
Description
Appeared to be in good working condition with no visible discrepancies.
Interior Inlet/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 light staining.
Coating Failure
< 5%
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 light staining.
Coating Failure
< 5%
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 light staining.
Coating Failure
< 5%
Interior Overflow
Description
Appeared to be in good working condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with spots of delamination.
Coating Failure
< 5%
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 light staining.
Coating Failure
< 5%
Interior Manway
Description
The gasket appeared to be fully intact and the hatch appeared to be in good working condition with minor corrosion present.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with light rust staining.
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 light staining.
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 light staining.
Coating Failure
< 5%
Interior Ceiling
Description
Appeared to be in good condition with isolated spots of minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with areas of light rust staining.
Coating Failure
< 5%
Description
Appeared to be in good condition with isolated spots of minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with areas of light rust staining.
Coating Failure
< 5%
Description
Appeared to be in good condition with isolated spots of minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with areas of light rust staining.
Coating Failure
< 5%
Interior Wall
Description
Appeared to be in good condition with isolated spots of minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with areas of light rust staining.
Coating Failure
< 5%
Description
Appeared to be in good condition with isolated spots of minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with areas of light rust staining.
Coating Failure
< 5%
Description
Appeared to be in good condition with isolated spots of minor corrosion present.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with areas of light rust staining.
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 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 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 staining present.
Coating Failure
< 5%
Sediment Depth
¼”
¼” ¼” ¼”
¼”
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:
❖ Some finishes are stained by rust. This staining must not be confused with the actual rusting involved.
❖ Accumulated dirt or other material may make accurate determination of the degree of rusting difficult.
❖ Certain types of deposited dirt that contain iron or iron compounds may cause surface discoloration that should not be mistaken for corrosion.
❖ It must be realized that failure may vary over a given area and discretion must therefore be used in applying these reference standards.
❖ 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.
❖ 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
No rusting or less than 0.01% of surface rusted Unnecessary
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
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%
Approximately one third of the surface rusted 33%
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%)
| Slide 1 |
| Slide 2 |
| Slide 3 |
| Slide 4: Exterior Wall |
| Slide 5: Exterior Wall |
| Slide 6: Exterior Inlet/Outlet |
| Slide 7: Exterior Inlet/Outlet |
| Slide 8: Exterior Drain |
| Slide 9: Exterior Drain |
| Slide 10: Exterior Overflow |
| Slide 11: Exterior Overflow |
| Slide 12: Exterior Manway |
| Slide 13: Exterior Manway |
| Slide 14: Exterior Stairway |
| Slide 15: Exterior Safety Rail |
| Slide 16: Exterior Hatch |
| Slide 17: Exterior Hatch Lid |
| Slide 18: Exterior Roof |
| Slide 19: Exterior Roof |
| Slide 20: Exterior Vent |
| Slide 21: Exterior Vent Screen |
| Slide 22: Interior Sediment |
| Slide 23: Interior Ladder |
| Slide 24: Interior Telemetry |
| Slide 25: Interior Inlet/Outlet |
| Slide 26: Interior Drain |
| Slide 27: Interior Drain |
| Slide 28: Interior Overflow |
| Slide 29: Interior Manway |
| Slide 30: Interior Manway |
| Slide 31: Interior Column Base |
| Slide 32: Interior Column |
| Slide 33: Interior Ceiling |
| Slide 34: Interior Ceiling |
| Slide 35: Interior Ceiling |
| Slide 36: Interior Wall |
| Slide 37: Interior Wall |
| Slide 38: Interior Wall |
| Slide 39: Interior Floor |
| Slide 40: Interior Floor |
| Slide 41: Interior Floor |
| Slide 42: Sediment Depth |
| Slide 43: References |
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