5-Attachment G - Quail Valley I Tank Inspection Report.pdf
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- Attached to
- Water Tank Painting Services
- Solicitation number
- RFP #3858
- Issued by
- Riverside County, California
About this file
This document is an inspection report from H2O Solutions, LLC for the Quail Valley I water tank, conducted for the Eastern Municipal Water District on November 29, 2024. The comprehensive inspection was performed using surface-supplied air and a sealed dry suit, following standards from OSHA, EPA, AWWA, NACE, SSPC, and ADC. The inspection covered both exterior and interior components of a steel water storage tank with a 50-foot diameter, 28-foot height, and 400,000-gallon capacity, with an unknown year of construction.
The inspection revealed generally good conditions across all examined components, with most areas rated as "Good" or "Excellent" and minimal corrosion. Specific findings include less than 5% corrosion on exterior walls, inlet/outlet, drain, and overflow areas, with rust grades consistently at level 5. Interior components also showed minimal issues, with a quarter-inch of sediment noted and no significant structural concerns. The only specific recommendation was to install a gasket on an exterior hatch to prevent insect and debris entry. The report includes detailed photographic documentation of each inspected area, using clock-face positioning to indicate specific locations of observations.
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EASTERN MUNICIPAL WATER
DISTRICT
Quail Valley I 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 I
Water Loss from Cleaning: 9,000 Gallons Diameter : 50’
Construction Type: Steel Height : 28’
Capacity(gal): 400,000 Year Built : Unknown
Exterior Wall
Description
Appeared to be in good condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining, minor delamination and chalking.
Coating Failure
5%
Recommendations
None at this time.
Exterior Wall
Description
Appeared to be in good condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining, minor delamination and chalking.
Coating Failure
5%
Exterior Inlet/Outlet
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 spots of delamination.
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 spots of delamination.
Coating Failure
< 5%
Exterior Overflow
Description
Appeared to be in good working condition with spots of heavy corrosion on standoff brackets.
Corrosion Present
5%
Rust Grade
Coating System
Appeared to be in good condition with staining and spots of delamination.
Coating Failure
5%
Exterior Overflow
Description
Appeared to be in good working condition with spots of heavy corrosion on standoff brackets.
Corrosion Present
5%
Rust Grade
Coating System
Appeared to be in good condition with staining and spots of delamination.
Coating Failure
5%
Exterior Manway
Description
The gasket appeared to be fully intact and the hatch 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 spots of delamination.
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 signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with some staining.
Coating Failure
0%
Exterior Ladder
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 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 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%
Install gasket to prevent insects/debris.
Exterior Hatch Lid
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 spots of delamination.
Coating Failure
< 5%
Install gasket to prevent insects/debris.
Exterior Roof
Description
Appeared to be in good condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining, minor delamination and chalking.
Coating Failure
5%
Exterior Roof
Description
Appeared to be in good condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with signs of staining, minor delamination and chalking.
Coating Failure
5%
Exterior Vent
Description
Appeared to be in good working condition with no visible signs of corrosion.
Corrosion Present
0%
Rust Grade
Coating System
N/A
Coating Failure
N/A
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
Exterior Side Vents
Description
All side vents 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, minor delamination and chalking.
Coating Failure
5%
Interior Sediment
Description
¼” of sediment.
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 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%
Interior 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%
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 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 minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light staining.
Coating Failure
< 5%
Description
Appeared to be in good condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light staining.
Coating Failure
< 5%
Description
Appeared to be in good condition with minor spots of corrosion.
Corrosion Present
< 5%
Rust Grade
Coating System
Appeared to be in good condition with light staining.
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 light staining.
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 light staining.
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 light staining.
Coating Failure
< 5%
Interior Floor
Description
Appeared to be in good condition with isolated spots of minor corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with light staining.
Coating Failure
< 5%
Description
Appeared to be in good condition with isolated spots of minor corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with light staining.
Coating Failure
< 5%
Description
Appeared to be in good condition with isolated spots of minor corrosion.
Corrosion Present
0%
Rust Grade
Coating System
Appeared to be in good condition with light staining.
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 Drain |
| Slide 8: Exterior Overflow |
| Slide 9: Exterior Overflow |
| Slide 10: Exterior Manway |
| Slide 11: Exterior Manway |
| Slide 12: Exterior Ladder |
| Slide 13: Exterior Safety Rail |
| Slide 14: Exterior Hatch |
| Slide 15: Exterior Hatch Lid |
| Slide 16: Exterior Roof |
| Slide 17: Exterior Roof |
| Slide 18: Exterior Vent |
| Slide 19: Exterior Vent Screen |
| Slide 20: Exterior Side Vents |
| Slide 21: Interior Sediment |
| Slide 22: Interior Telemetry |
| Slide 23: Interior Inlet/Outlet |
| Slide 24: Interior Drain |
| Slide 25: Interior Manway |
| Slide 26: Interior Column Base |
| Slide 27: Interior Column |
| Slide 28: Interior Ceiling |
| Slide 29: Interior Ceiling |
| Slide 30: Interior Ceiling |
| Slide 31: Interior Wall |
| Slide 32: Interior Wall |
| Slide 33: Interior Wall |
| Slide 34: Interior Floor |
| Slide 35: Interior Floor |
| Slide 36: Interior Floor |
| Slide 37: Sediment Depth |
| Slide 38: References |
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