Statement_of_Work.pdf

SECTION XXXXXX

ROCKY MOUNTAIN NATIONAL PARK

REPAIR AND RECOAT FALL RIVER PASS 20K TANK

DESCRIPTION

1. The Scope of Work (SOW) includes all labor, materials and equipment to clean, perform repairs, prepare the surface, and re-coat the 20,000-gallon (20-K or ‘the Tank’) buried concrete water tank at Fall River Pass (FPR) in Rocky Mountain National Park (RMNP or ‘the Park’).

2. Background: The 20K concrete water storage tank is located atop US HWY 34/Trail

Ridge Road in RMNP, Colorado. The 20K tank was constructed in 1938 and sits at an elevation over 11,815 feet above sea level. The approximate dimensions are 24 feet long by 12 feet wide by 9.5 feet tall with an interior surface area of approximately 1,260 square feet

3. Purpose: This project is to address minor deficiencies identified during a routine comprehensive inspection and cleaning in June of 2024. Minor deficiencies include hairline cracking, moderate voids, exposed re-enforcement, exposed aggregate, surface corrosion of ladder, outlet and drain, and repairs to a known leak in the southwest corner.

Details can be found in a June 2024 inspection report included as an appendix.

4. Location: The work site is approximately 25 miles west of the Estes Park Visitor Center in downtown Estes Park. Generally, vehicles can access to within 500 feet of the 20K tank. The Tank is adjacent to the western intersection of OFRR and US HWY 34, approximately 500 feet to the north, and 90 feet above OFFR. See Appendix 1 for maps as well as a link to this pin.

PERFORMANCE PERIOD

1. Work shall not commence before approved by the Contracting Officer (CO) and expected to occur between August 30, 2025, and November 30, 2025. The total performance period is 90 calendar days. Work shall be performed Monday through Friday between the hours of 7:00 AM and 5:30 PM, excluding federal holidays, unless alternate hours are approved in advance in writing by the CO and/or Contracting Officer Representative

(COR).

2. This water system is operated seasonally and is scheduled to shut down on/around

September 11, 2025. Work in this scope shall not interrupt water service and thusly shall occur after the water system shuts down and before Trail Ridge Road closes for the winter. Weather can close Trail Ridge Road at any time, however facilities at Fall River

Pass generally remain open for business through the Columbus Day holiday. This work is expected to be performed between approximately mid-September and mid-October

2025. The Contracting Officer (or their designee) will coordinate with the Contractor for an extension and/or alternative to the period of performance should the need arise.

MATERIALS AND EQUIPMENT

https://maps.app.goo.gl/BmTEdGFo3vtyieYG7

1. All materials and equipment shall be Contractor-furnished.

SUBMITTALS

1. Product Data: For each type of coating product:

a. Provide manufacturer’s literature including product name, product line, and generic makeup for each type of coating or additive specified.

b. Provide certification that coating system used on tank interior has been classified by ANSI certified laboratory to ANSI/NSF 61 as acceptable for surfaces in contact with potable water.

c. Provide manufacturer’s Safety Data Sheets (SDS) and/or technical data sheet including recommended surface preparation; curing time; mixing, thinning and application instructions; performance criteria; safety information; and other relevant technical data.

d. Provide manufacturer’s details for recommended surface preparation and application of product at cracks, pipe penetrations, floor to wall joints and expansion joints.

2. Literature for blast media including and SDS information.

3. Written documentation of applicator’s experience and qualifications, including references providing three years’ experience and up to five recent references of Applicator working with similar products and conditions of this project.

QUALITY ASSURANCE

1. All coating materials shall be NSF 61 certified as acceptable for surfaces in contact with potable water.

2. Coating products for all work specified in this Section shall be compatible products from a single manufacturer.

3. Applicator shall initiate and enforce quality control procedures consistent with applicable

ASTM, NACE and SSPC standards and the protective coating manufacturer’s recommendations.

4. Comply with manufacturer’s recommendations for surface preparation, coating application and curing period: do not apply materials when environmental conditions are outside the ranges required by product manufacturer. However, due to the elevation and timeline of this project, a low-temperature curing product and/or additive should be considered.

5. Maintain environmental temperature and humidity conditions to meet specified requirements during surface preparation, coating application and curing period by use of indirect fired heater and dehumidification equipment. If heaters are used, locate heaters outside the tank with hot air ducted into the tank. Heaters shall be continuously monitored unless approved by the CO and fueled by clean burning fuels as much as possible.

QUALIFICATIONS

1. Manufacturer:

a. Company specializing in manufacturing products specified in this section with minimum 10 years’ experience.

2. Applicator:

a. Applicator has been trained in the handling, mixing and application of the products to be used.

b. Equipment used for applying products has been approved by the coating manufacturer and Applicator personnel have been trained and certified for proper use of equipment.

SAFETY

1. All work shall comply with OHSA requirements, including access into the tank, confined space, scaffolding, ventilation, personal protective equipment, lighting, monitoring and any other conditions which apply.

2. Contractor shall provide authorized representatives with safety equipment required by

OHSA regulations.

3. Confined space protocols and proper heating and ventilating of the interior tank space for curing temperature and time are of prime concern.

4. The Contractor is responsible for timely reporting of safety issues and/or incidents to the appropriate officials: dial 911 for emergencies in the park, contact Rocky Mountain

National Park Dispatch at 970-586-1204 for non-emergencies and the CO or COR.

GENERAL

1. The Contractor is to adhere to all park rules and regulations, including keeping a clean work site, obeying traffic signs, speed limits, following food storage requirements, etc.

2. This project occurs in an iconic and heavily visited National Park at high elevation where weather may be a factor and wildlife and visitors will be present.

3. The Contractor may not stage and/or drive off paved or unpaved roads: staging options exist in the area near the generator shed at the top of Old Fall River Road and will be discussed following award and approved by the CO or designee.

4. The project site is outside Designated Wilderness. However, for loading and unloading materials, supplies and equipment to and from the 20K Tank, the use of hand carts, dolly’s, skids and other transportation-devices off roadways is not permitted by the

Contractor without prior written approval from the CO or designee.

5. Specified thickness and coverage for coatings are written as recommended by their respective manufacturer. If an approved equal product is used, the requirements of the manufacturer of the approved equal product shall be followed.

ABRASIVE BLASTING GRIT MATERIAL

1. All abrasives shall be dry, clean, free of oil, grease, dirt, chemicals, and other contaminants that may interfere with adhesion of coating. Abrasive shall not be reused from a previous project. Abrasives shall not be reused on this project unless they are cleaned, dried and screened to the original sizing and approved by the Contracting

Officer.

2. Material and particle size of the abrasives used shall be as recommended by the coating manufacturer and SSPC-13/NACE No. 6 “Surface Preparation of Concrete” and produce a sufficient surface profile that is in accordance with the coating manufacturer’s recommendations and SSPC-13/NACE No. 6 “Surface Preparation of Concrete”.

PATCHING AND FILLER MATERIAL FOR TANK INTERIOR

1. Water-based, low odor, epoxy modified repair mortar suited for patching spalled concrete, voids, holes and filling cracks.

2. Epoxy mortar shall be usable as a primer without aggregate and shall be easily top-coated and compatible with coating materials.

3. Patching and filling material shall be Mortarclad Series 218, as manufactured by Tnemec

Company Inc., Kansas City, MO, 800-TNEMEC1, www.tenemec.com, or approved equal.

COATING SYSTEM MATERIAL

1. Interior of water storage tank

2. Two Coat System

3. Polyamidoamine Epoxy

4. ANSI/NSF 61 certified for use on interior of potable water tanks.

5. Low temperature cure, minimum 35 degrees F

6. Color: 1255 Beige

7. Gloss finish

8. Dry film thickness: 6.0 to 10. mils / coat

9. Solids by volume: 67.0 +/- 2.0%

10. Coverage rate: 1,070 mil sq ft/gal

11. Coating shall be POTA-POX PLUS SERIES N140, as manufactured by Tnemec

Company Inc., Kansas City, MO, 800-TNEMEC1, www.tenemec.com or approved equal.

LIQUID SOLUBLE SALT REMOVER

Organic bonding chemical blend for aiding removal of chlorides, sulfates and surface reacted calts (calcium carbonates). Liquid soluble salt remover shall be VOC free and biodegradable.

Liquid soluble salt remover shall be Chlor*Rid, as manufactured by Chlor*Rid International, Inc., Chandler, AZ, 85244, www.chlor-rid.com, or approved equal.

INSPECTION and PREPARATION

1. For each step of the striping, preparation and re-coating process, examine substrate areas and conditions for compliance with the coating system manufacturer’s requirements for moisture content, installation tolerances and other conditions affecting performance of the coat and coating system.

2. Protect adjacent work areas from damage during cleaning and coating system application.

3. Cap or seal pipe openings into tank to prevent entry of foreign matter. Leave caps or seals in place until all surfaces are ready for first coat

4. Coordinate with the Contracting Officer Representative to remove, relocate and/or protect tank level indicators and floats during all phases of work.

ABRASIVE BLAST CLEANING OF TANK INTERIOR:

1. Remove contaminants, laitance, and loosely adhering concrete to provide a sound, uniform substrate suitable for application of the specified coating system in accordance with SSPC-SP13/NACE No. 6 and ASTM D4258.

2. Remove sharp concrete edges and projections.

3. Abrasive blast in accordance with SSPC-SP13/NACE No. 6 and ASTM D4259 to obtain a firm, sound concrete surface free of laitance with anchor profile of ICRI CSP3, CSP4 or

CSP5. Bug holes, form voids and similar irregularities shall be fully opened.

4. Test for moisture content in the concrete in accordance with SSPC-SP 13/NACE No. 6.

5. Repair defects in concrete surface, such as bug holes, air pockets, honeycomb and cracks by filling and smoothing off with approved patching material as recommended by the manufacturer.

6. Abrasive blast repaired surfaces.

STEEL COMPONENTS: SURFACE PREPARATION & APPLICATION

1. Prepare all steel surfaces. according to the manufacturer’s recommendations. Apply coating system per manufacturer’s recommendations for steel.

PATCHING AND FILLING TANK INTERIOR

1. Following abrasive grit blasting, the Contractor shall clean and inspect the surface of the interior of the tank for areas that require patching and/or filling of cracks and voids.

2. Special attention shall be paid to areas identified in the furnished inspection and cleaning report including the southwest corner.

3. Report any deficiencies or structural issues to the CO or Representative before proceeding to application of coating system.

APPPLICATION OF INTERIOR TANK COATING SYSTEM

1. Applicator shall be trained in using application equipment.

2. Follow all manufacturers and OSHA requirements for safety and application.

3. Mix and apply coatings in accordance with manufacturer’s instructions.

4. Apply coatings with an even film of uniform thickness which tightly bonds to substrate or previous coat.

5. Fill crevices and cover irregularities.

6. Apply free of runs, pinholes, sags, laps, brush marks, voids and other defects.

7. Apply coating at manufacturer’s recommended application rate. Build up film for each coat to specified thickness. Apply additional coats when necessary to achieve specified thickness, within re-coat window and at humidity and temperature as recommended by manufacturer.

8. Ensure each coat is cured in accordance with manufacturer’s instruction before application of succeeding coat.

CRACKS, PIPE PENETRATIONS, FLOOR TO WALL JOINTS, EXPANSION JOINTS

1. Install coating system at cracks, pipe penetrations, floor to wall joints and expansion joints with joint seals, backer rods, reinforcement fabric, primer, basecoat and topcoat as recommended by manufacturer.

FIELD QUALITY CONTROL

1. Contractor and Contracting Officer Representative shall inspect all tank areas during surface preparation and coating activities including abrasive blasting media, blasting equipment, and methods being used; concrete surface preparation including cleanliness and blast profile; mixing and coating application methods and testing, and all other aspects of the work.

2. The Contractor shall closely coordinate repairs and patching work with the CO or designee to address known issues identified in the June 2024 Inspection Report as well as issues discovered preparing the surface for coating.

Standards for Field Quality Control

1. International Concrete Repair Institute (ICRI) Guideline No. 03732 - Selecting and

Specifying Concrete Surface Preparation for Sealers, Coatings and Polymer Overlays.

2. NACE International:

a. SP0188, Standard Recommended Practice, Discontinuity (Holiday) Testing of

Protective Coatings.

3. SSPC: The Society for Protective Coatings (SSPC):

a. SP13/NACE No. 6, Surface Preparation of Concrete

4. ASTM International:

a. D4263, Standard Test Method for Indicating Moisture in Concrete by the Plastic

Sheet Method.

b. D4414, Standard Practice for Measurement of Wet Film Thickness by Notch

Gage

c. F1869, Standard Test Method for Measuring Moisture Vapor Emission Rate of

Concrete Subfloor Using Anhydrous Calcium Chloride.

d. F2170, Standard Test Method for Determining Relative Humidity in Concrete

Floor Slabs Using in situ Probes.

Equipment Required

1. Surface profile measurement test kit for measurement on metal surfaces.

2. Wet film thickness gauge with required accuracy.

3. Temperature gauges.

4. Relative humidity and dew point measurement kit.

5. Temporary ladders, scaffolding, lighting, and safety equipment per OSHA requirements.

Testing

1. Calibrate all equipment before each use or per manufacturers requirements.

2. Keep a daily log of all test results; provide a copy of log to the Contracting Officer

(and/or their representative) on a weekly basis.

3. Measure and record ambient air and surface temperatures before coating begins, at approximately mid-day and at the end of daily coating period or as conditions change.

4. Measure and record relative humidity and dew point before coating begins each day and at least every 4 hours.

5. Profile of concrete surfaces shall meet the requirements specified by the coating manufacturer and SSPC SP-13/NACE No. 6.

6. During application a wet film thickness gauge meeting ASTM D4414 – Standard Practice for Measurement of Wet Film Thickness of Organic Coatings by Notched Gages, shall be used to ensure a monolithic coating and uniform thickness during application.

7. After coating has set hard to the touch it shall be visually inspected.

8. Conduct all other testing as necessary to ensure conformance with statement of work, specifications, OSHA and industry requirements.

9. Correct all areas where preparation and/or coating does not meet the requirements of specifications within minimum and maximum recoat window time in accordance with coating manufacturer’s recommendations. Reinspect repaired areas for compliance with specifications.

10. Provide results of testing in a written report.

PROTECTION

1. Prevent damage to nearby resources, visitors, structures and vehicles resulting from overspray and Contractor activities.

2. Protect applied coatings from damage during curing.

CLEANING, FLUSHING AND DISINFECTION

1. Do not clean, flush and disinfect tank until all tests on coating systems have been completed, the coatings have cured properly and approved by the Contracting officer.

2. Clean, flush and disinfect tank per AWWA C652-11 Disinfection of Water Storage

Facilities.

3. The Contractor shall notify the CO or designee as soon as possible if unable to comply with the requirements AWWA C652-11, Disinfection of Water Storage Facilities, for final cleaning, flushing and disinfection.

DISPOSAL

1. Remove all sediment, blast media, empty containers, unused coating products and construction materials and dispose offsite.

Map 1) Overall Project Area relative to Park HQ & Estes Park Visitor Center

Approximate Project Location, Fall

River Pass, RMNP

Approximate Location of RMNP Headquarters

Area & Beaver Meadows Visitor Center

Approximate Location of

Estes Park Visitor Center

US HWY 34

Approximate Location of FRP 20K tank

Alpine Visitor Center & Trail Ridge Store

Old Fall River Road

Approximate Location of water system well

US HWY 34

Map 2) Project Site Details

Approximate Location of generator shed (B-692) and buried 60K tank

Closest vehicle access at red X: approximately 500 linear x 90 vertical feet from OFRR to 20K tank B-1115 Vault toilet available to the public and for contractor use.

Inspection Report For:

Rocky Mountain National Park

Estes Park, CO

20KG Tank Concrete Below-Grade Fall River Pass Tank 2

Date Completed: 07-18-2024

Diver: Colin Lafever

Dive Controller: Jesper Johnson

Tender: Ceasar Hernandez

Tank Inspection Report 20KG CBG Fall River Pass Tank 2

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16297 E Crestline Lane Centennial, CO 80015 Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Scope of Work Our team completed sediment removal using underwater vacuum equipment. A dusting of Sand was removed from the tank floor. When the cleaning process was finished, a full visual inspection was performed of the tank interior and all interior fixtures. The team also performed a full visual inspection of the tank exterior and all attached fixtures. The details of the inspection findings follow.

Summary of the Inspection

Exterior Inspection

1. The round access hatch (24 inches) is in good overall condition. It was locked, with an intact gasket and no debris below. The hatch is coated. The coating shows minor sags/runs. No corrosion discrepancies were observed.

Interior Inspection

1. The interior concrete roof is in good overall condition with no signs of structural deficiencies, low spots, or holes. Minor hairline cracking, minor exposed scattered reinforcement, and minor exposed aggregate were noted.

2. An interior ladder is present at the South West Wall and is in fair overall condition. Uniform surface corrosion (33%) was observed.

3. The interior concrete wall is in fair overall condition with no signs of movement, structural deficiencies, or leaking. No biofilm was present. Moderate hairline cracking, moderate voids, minor exposed reinforcement in multiple areas throughout the tank, and moderate exposed aggregate were observed.

4. The interior concrete floor is in good overall condition with no signs of movement, structural deficiencies, or leaking. Minor hairline cracking, minor spalling, minor voids, and minor exposed aggregate were noted. A leak was found in the southwest corner and was repaired. It is recommended to do a concrete resurfacing due to the amount of exposed aggregate.

5. The inlet is located at the South Wall and is in good overall condition. It is a PVC pipe and is in good condition.

6. The outlet is located at the West Wall and is in good overall condition. Uniform surface corrosion (10%) was observed.

7. The drain at the center position is in good overall condition. Uniform surface corrosion (0.01% to 0.03%) was noted.

Recommendations

1. Continue to schedule time to clean and inspect Every 3-5 years per AWWA recommendations.

2. Perform epoxy repairs to a large crack at the Northwest interior wall.

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Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Access

Did the team go portable to access the tank?

Yes Umbilical could not reach job site.

Security

Is the tank in a secured, gated area? No

Is the tank equipped with a vandal guard on the access ladder(s)?

No

Are all of the access hatches locked? Yes

Are all of the vents/discharge openings properly covered?

Yes

Does the tank exterior show any signs of trespass?

No

Is the area surrounding the tank well lit? Yes

Are there any additional security features? No

P a g e | 4

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Access Hatch Condition

Access Hatch Photos

Access Hatch Shape Round

Access Hatch Size 24 inches

Riser Height 2 feet

Lid Height 1 inch

Was the hatch locked? Yes

Hinge Condition Good

Is a gasket present? Yes

Is the gasket intact? Yes

P a g e | 5

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Is there any dirt or debris below the hatch? No

Is the hatch coated? Yes

Welds/Seams Condition Good

Hatch Coating Condition Oxidation? None

Delamination? None

Staining None

Blistering? None

Chalking? None

Cracking in the Coating? None

Pinholes? None

Sags/Runs? Minor

Hatch Corrosion Discrepancies Uniform Surface Corrosion None

Concentrated Cell Corrosion None

Rust Noduling None

Pitting Depth None

Galvanic Corrosion None

De-Alloying None

Intergranular Corrosion None

Stress Corrosion None

Erosion Corrosion None

Access Hatch Overall Overall Condition Good

P a g e | 6

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Interior Roof Condition

Roof Photo

Is the roof concrete or steel? Concrete

Are there any low spots? No

Are there any holes in the roof/can daylight be seen at the roof/wall seam?

No

Are there any signs of irregularities or structural deficiencies?

No

Seams/Welds Good

Interior Roof Concrete Condition Hairline Cracking Minor

Settling Cracking None

Pressure Cracking None

Checking None

Popouts None

Spalling None

Voids None

Exposed Reinforcement Minor Scattered

Exposed Aggregate Minor

Organic Growth None

P a g e | 7

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Interior Roof Overall What is the overall condition of the interior roof?

Good

Interior Ladder Condition

Is there an interior ladder? Yes

Access Ladder Photos

Interior Ladder Location South West Wall

Stand-Offs Condition Good

Seams/Welds Condition Good

P a g e | 8

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Access Ladder Corrosion Discrepancies Uniform Surface Corrosion Grade 2 - 33%

Concentrated Cell Corrosion None

Rust Noduling None

Pitting Depth None

Galvanic Corrosion None

De-Alloying None

Intergranular Corrosion None

Stress Corrosion None

Erosion Corrosion None

Access Ladder Overall Interior Ladder Overall Condition Fair

Interior Wall Condition

Wall Photos

P a g e | 9

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

P a g e | 10

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed

Is the wall concrete or steel? Concrete

Are there any signs of movement? No

Are there any signs of irregularities or structural deficiencies?

No

Are there any signs of leaking? No

Is Biofilm present on the walls? No

Seams/Welds Good

Interior Wall Concrete Condition Hairline Cracking Moderate

Settling Cracking None

Pressure Cracking None

Checking None

Popouts None

Spalling None

Voids Moderate

Exposed Reinforcement Minor Multiple areas through tank.

Exposed Aggregate Moderate

Interior Wall Overall Condition What is the overall condition of the interior wall?

Fair

P a g e | 11

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Interior Floor Condition

Floor Photos

Is the floor concrete or steel? Concrete

Are there any signs of movement? No

Are there any signs of irregularities or structural deficiencies?

No

Are there any signs of leaking? No

Seams/Welds Good

Interior Floor Concrete Condition Hairline Cracking Minor

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Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Settling Cracking None

Pressure Cracking None

Checking None

Popouts None

Spalling Minor

Voids Minor

Exposed Reinforcement None

Exposed Aggregate Minor

Interior Floor Overall Condition What is the overall condition of the tank floor?

Good

Tank Floor Additional Info Leak was found in southwest corner and was repaired.

Recommend doing a concrete resurfacing with the amount of exposed aggregate.

Interior Inlet & Outlet Condition

Are the inlet and outlet separate or common?

Separate Inlet and Outlet

Inlet Photo

Inlet Location South Wall

Inlet Seams/Welds Condition Good

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Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed

Outlet Photos

Outlet Location West Wall

Outlet Seams/Welds Condition Good

Outlet Corrosion Discrepancies Uniform Surface Corrosion Grade 4 - 10%

Concentrated Cell Corrosion None

Rust Noduling None

Pitting Depth None

Galvanic Corrosion None

De-Alloying None

P a g e | 14

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Intergranular Corrosion None

Stress Corrosion None

Erosion Corrosion None

Inlet Overall Condition What is the overall condition of the inlet? Good

Inlet Additional Info Inlet is a PVC pipe and is in good condition.

Outlet Overall Condition What is the overall condition of the outlet? Good

Drain Condition

Drain Photo

Drain Location Center

Seams/Welds Condition Good

Drain Corrosion Discrepancies Uniform Surface Corrosion Grade 9 – 0.01% to 0.03%

Concentrated Cell Corrosion None

Rust Noduling None

Pitting Depth None

Galvanic Corrosion None

De-Alloying None

P a g e | 15

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Intergranular Corrosion None

Stress Corrosion None

Erosion Corrosion None

Drain Overall Condition What is the overall condition of the drain? Good

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Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed

Tank Map

P a g e | 17

Phone: 303.400.4220

Fax: 303.400.4215

Excellent – Like new, no repairs needed Good – Cosmetic problems, repair if utility wants

Fair – Minor problems, repairs needed Poor – Major problems, fix now

Tank Condition

Does the tank appear to be structurally sound?

Yes

Are there any unprotected openings in the tank (breaches, leaks, daylight, etc.)?

No

When viewed from inside the tank, is there visible daylight around the hatches, vents, joints or other fixtures?

No

Tank Cleaning

Was the tank cleaned? Yes

Sediment Depth Before Cleaning Dusting

Sediment Type Sand

List any objects found inside the tank during cleaning that may have introduced contamination:

n/a

Recommendations

Standard Clean and Inspect - How often? Every 3-5 years

Does the tank need any screens, hatch gaskets, or locks?

None

Are epoxy repairs needed? Yes Identified Large crack, Northwest Wall.

Does the tank need a blast and recoat? No

Please list/describe any additional recommendations. If none, type "n/a"

N/a