ATTACHMENT NUMBER 6 ACAD 194701 Rehab 150000 Gallon Water Tower Section 09 97 13.24 update_0003.pdf

ACAD-194701 09 97 13.24 – 1

STEEL WATER STORAGE TANK PAINTING

SECTION 09 97 13.24 - STEEL WATER STORAGE TANK PAINTING (Revision 1)

PART 1 - GENERAL

1.1 DESCRIPTION

A. The Work of this section includes preparing all exterior surfaces of the entire tower and tank structure and applying a new protective coating over the existing coating. The Work of this section also includes preparing all interior surfaces of the water tank and applying a new protective coating.

B. This section is intended to be used in conjunction with the requirements of Section 33 16 20 –

Rehabilitation of Elevated Water Utility Storage Tank and Section 13 20 00 – Lead Based Paint Abatement.

1.2

QUALITY ASSURANCE

A. Coating Manufacturer’s Technical Representative:

1. The coating manufacturer shall provide a technical representative to visit the project site, with the Contracting Officer, at intervals during surface preparation, painting, and final inspection as may be required for product application quality assurance, and to determine compliance with manufacturer's instructions and these Specifications, and as may be necessary to resolve field problems attributable to, or associated with, the manufacturer's products furnished.

2. At a minimum, the coating manufacturer’s technical representative shall be on site for the final surface preparation and start of each coating application. Visits shall be coordinated with the Contracting Officer a minimum of 3 days in advance.

3. The coating manufacturer’s technical representative shall verify that the Contractor’s surface preparation methods achieve the manufacturer’s recommended cleanliness and surface profile for the coatings to be applied, instruct Contractor on coating mixing, thinning and application procedures, and all other relevant information to assure successful application of the specified coating systems.

4. Coating manufacturer’s technical representative shall have a minimum of 5 years’ experience with the products to be applied and National Association of Corrosion Engineers (NACE) Coating Inspector Program (CIP) Level 3 certification.

B. Applicator Experience:

1. Minimum of 5 years practical experience in industrial coating projects, including steel tank recoating, specified surface preparation, lead-based coating removal, and application of the specified paint systems.

2. Contractor’s site supervisor on site shall have a minimum of 5 years practical experience in steel tank recoating, specified surface preparation, lead-based coating removal, and application of the specified paint systems.

C. The Contractor shall have designated Quality Control personnel on site during work to perform and document quality control inspections. Contractor’s designated Quality Control personnel

ACAD-194701 09 97 13.24 – 2

shall be NACE CIP Level 1, minimum. All work performed by Contractor’s designated on site Quality Control personnel shall be under the supervision of a NACE CIP Level 3 inspector. All Contractor work shall be verified and certified by NACE CIP Level 3 inspector.

D. The Contractor shall have a designated Competent Person, who will be responsible for, and on site during, all work associated with removal, handling, containment, storage, and disposal of lead-containing coating waste. The Competent Person will observe, direct, and document all related work activities.

E. Continuity of Contractor: The Contractor's Competent Person shall be coordinated with the

Contracting Officer. Any replacement of the Competent Person on site will require notification of the Contracting Officer a minimum 72 hours in advance, and will be subject to approval by the Contracting Officer. Acceptance of the Competent Person’s replacement will be required to meet the experience requirements and subject to review and verification of experience documentation.

1.3 SUBMITTALS

A. All submittals shall be in accordance with Section 01 33 23 – Submittal Procedures, except as modified herein.

B. The required paint system information shall be submitted on a system-by-system basis for each system used. Indiscriminate submittal of manufacturer's literature is not acceptable.

C. For each paint system used herein, furnish a Paint System Data Sheet (PSDS), Technical Data

Sheets, and paint colors available (where applicable) for each product used in the paint system.

D. Where ANSI/NSF Standard 61 approval is required, submit ANSI/NSF certification letter for each coating in the system indicating product application limits on size of tank or piping, dry film thickness, number of coats, specific product tested, colors certified, and approved additives.

E. The color of the exterior paint system shall match the existing paint color.

F. Manufacturer's printed instructions including storage temperature range, detailed mixing and application procedures, number and types of coats required, minimum and maximum application temperatures, and curing procedures. Provide Materials Safety Data Sheets (MSDS) for materials to be used at the job site.

G. Dehumidification and Temperature control plan for the interior of the tank. Provide

Dehumidification and Temperature Control design and calculations, equipment information, procedures for operation and maintenance, process of verification of equipment effectiveness, and procedure for assuring operation of equipment outside of normal work hours.

H. Coating Plan:

1. Provide procedures for all phases of coating operations, including planned work, rework, repair, inspection, and documentation. Address mobilization and setup, surface preparation, coating application, coating initial cure, tracking and correction of non-compliant work, and demobilization. For each process, provide procedures that include

ACAD-194701 09 97 13.24 – 3

appropriate work instructions, material and equipment requirements, personnel qualifications, controls, and process verification procedures. Provide procedures for inspecting work to verify and document compliance with contract requirements, including inspection forms and checklists, and acceptance and rejection criteria.

2. Provide procedures for correcting non-compliant work. Detailed procedures are required in advance to avoid delays in meeting overcoat windows as well as to avoid delays in production. Provide procedures for repairing defects in the coating film, such as runs, drips, sags, holidays, overspray, as well as how to correct coating thickness non-compliance, any other areas of repair or rework that might be adversely affected by delays in preparing and approving new procedures.

I. Blast Abrasives Plan

1. Provide TCLP test data for lead and other regulated heavy metals in non-recyclable abrasive blast media to be used on the project.

2. Acceptable abrasive test data shall indicate the abrasive manufacturer, location of manufacture, test date, and media gradation and type. Surface preparation will not be permitted to begin until acceptable test data has been submitted.

J. Certification of Experience. Provide certification of all required experience, including verification of all required NACE certifications. Practical experience shall be represented by past projects of similar scope and complexity. Past project information shall include the following:

1. Project name and address

2. Description of Work including lead coating removal process, handling testing, storage, transportation, and disposal of lead coating waste.

3. Name of Owner

4. Name of Contractor

5. Name of Engineer

6. Date of Completion

1.4 COORDINATION, SEQUENCING AND SCHEDULING

A. Sequence of Work: Perform work of this section and other sections in the optimum sequence to prevent damage to or interference with other work.

1.5 DELIVERY, STORAGE AND HANDLING

A. Deliver materials to site in manufacturer’s original and unopened containers and packaging, bearing labels as to type and names of products and manufacturers.

B. Protect materials from damage by moisture and temperature. Store in a dry location or in waterproof containers. Keep containers tightly closed and away from open flames. Protect liquid components from freezing. Comply with manufacturer’s recommendation for minimum and maximum temperature requirements for storage.

C. Satisfactorily restore any damage to site caused by storage or construction work at no additional expense to the Government.

ACAD-194701 09 97 13.24 – 4

1.6 SAFETY AND HEALTH REQUIREMENTS

A. All work shall be done in accordance with the applicable OSHA requirements, including confined space requirements as applicable.

B. The Contractor shall provide adequate ventilation to avoid build-up of toxic vapors inside the tank during the Work.

C. When paint coatings are being applied, all persons exposed to toxic vapors shall wear air-supplied masks, eye and face protection devices.

D. Provide spark proof artificial lighting for all work inside the tank as needed. Provide additional lighting as required for inspections. Use non-sparking, non-conducting equipment and clothing.

E. See Section 33 16 20, 1.10 for additional information and requirements.

PART 2 - MATERIALS

2.1 SURFACE PREPARATION AND CLEANING

A. All abrasive utilized on the project shall be new and arrive on site in sealed containers.

B. Abrasive shall be selected to meet the requirements of the specified coating systems, requirements of SSPC AB1, 2, and 3, and regulatory requirements.

C. The abrasive for interior surfaces shall be commercially available, non-metallic expendable abrasive or reusable steel grit.

D. Recyclable abrasive used on the exterior shall not be used on the interior of the tank.

E. Abrasive utilized for the removal of lead-based coatings shall be recyclable steel grit.

F. All recyclable abrasive utilized on the project shall be tested and disposed of in accordance with local, State, and Federal regulations

G. Pressure washing of the exterior surfaces of the tank shall be done with an anti-fungal biodegradable solution.

H. The Contractor shall supply all water required for pressure washing of the exterior surfaces.

All water used in the pressure washing of the exterior surfaces shall be clean and potable. All water collected from the pressure washing operations shall be properly disposed of in accordance with Local, State and Federal regulations.

2.2 EXTERIOR PAINT SYSTEM

A. The exterior paint system shall be comprised of a three-coat system with a primer coat, intermediate coat, and finish coat. Each coat of the selected paint system shall be produced by

ACAD-194701 09 97 13.24 – 5

the same manufacturer and the manufacturer shall certify that each coat is compatible with the complete paint system.

B. All paint products shall meet Federal, State and Local requirements limiting the emission of volatile organic compounds.

C. Thinners, cleaners, driers and other additives shall only be used as recommended by the paint manufacturer for that particular coating.

D. The primer coat shall be the epoxy paint type listed below or an approved equivalent:

1. Macropoxy 5000 by Sherwin Williams.

E. An equivalent paint type at a minimum shall have the following characteristics:

1. Rust-inhibitive, pigmented, ultra-high solids, penetrating epoxy primer/sealer for use over marginally prepared steel and aged coatings.

2. Ability to penetrate tight rusted steel providing a firm anchor for subsequent topcoats.

3. 90% volume solids, minimum.

4. Low VOC.

5. Surface and moisture tolerant.

6. Suitable for anticipated application temperatures and high moisture conditions.

F. The intermediate coat shall be the paint type listed below or an approved equivalent:

1. Dura-Plate 235 PW by Sherwin Williams.

G. An equivalent paint type at a minimum shall have the following characteristics:

1. Recommended for use on water storage tanks.

2. Self-priming.

3. Ability to cure at low temperatures.

4. 65% volume solids, minimum.

5. Low VOC.

H. The finish coat shall be the paint type listed below or an approved equivalent:

1. Acrolon 218 HS by Sherwin Williams.

I. An equivalent paint type at a minimum shall have the following characteristics:

1. Recommended for use on exterior water storage tanks.

2. Polyester modified, aliphatic, acrylic polyurethane.

3. 65% volume solids, minimum.

4. Low VOC.

J. The finish coat color shall match the existing tank exterior color. The Contractor shall take a sample of the existing paint color and color match that color. The proposed color of the finish coat shall be noted in the Contractor’s paint system submittal. The Contractor shall prepare a

ACAD-194701 09 97 13.24 – 6

12”x12” test area of the new paint on one of the existing tower legs so that the Contracting Officer can approve the color before any other parts of the structure exterior are painted.

K. Furnish 1 gallon of finish coat to the Government for future touch-up.

2.3 INTERIOR PAINT SYSTEM

A. The interior paint system shall be comprised of a two-coat system with a prime coat and a finish coat. Each coat of the selected paint system shall be produced by the same manufacturer and the manufacturer shall certify that each coat is compatible with the complete paint system.

B. All paint products shall meet Federal, State and Local requirements limiting the emission of volatile organic compounds. All paint products shall also meet the requirements of ANSI/NSF Standard 61.

C. Thinners, cleaners, driers and other additives shall only be used as recommended by the paint manufacturer for that particular coating. Thinners, cleaners, driers and other additives that are not approved in accordance with ANSI/NSF Standard 61 shall not be used on the interior of the tank.

D. The interior paint system shall be an AWWA D102 approved inside steel coating system for use in immersion.

E. The prime and finish coats shall be the paint type listed below or an approved equivalent:

1. Dura-Plate 235 PW by Sherwin Williams.

F. An equivalent paint type at a minimum shall have the following characteristics:

1. ANSI/NSF Standard 61 approved for potable water.

2. Recommended for use on water storage tanks.

3. Self-priming.

4. Ability to cure at low temperatures.

5. 65% volume solids, minimum.

6. Low VOC.

ACAD-194701 09 97 13.24 – 7

PART 3 - EXECUTION

3.1 GENERAL

A. Surface preparation and coating application shall be in conformance with these Specifications and the coating manufacturer’s written instructions and written recommendations of the manufacturer’s onsite technical representative. Where conflicts occur between the manufacturer’s recommendations and these Specifications, the more stringent of the two shall apply unless approved otherwise by the Contracting Officer.

3.2 EXTERIOR SURFACE PREPARATION

A. The existing paint coating on the exterior of the tank was tested and found to be lead-containing paint. See Section 13 20 00 – Lead Based Paint Abatement for additional information, including test results for lead in the existing paint.

B. Clean all exterior surfaces identified for painting.

C. Remove and properly dispose of accumulated bird droppings, dirt, grease and debris from all areas to be prepared and painted prior to undertaking any paint removal or surface preparation operations. SSPC-SP-1, solvent cleaning will be required for removing all visible oil, grease, soil, and other soluble contaminants from steel surfaces.

D. The entire exterior of the tank shall be cleaned with an anti-fungal biodegradable solution using one of the two following methods:

1. A high-pressure water blast of no less than 5,000 psi HPWC (high-pressure water cleaning) at 180o F at five gallons per minute with a zero degree rotating tip (at a maximum of a 4” standoff distance) to a SSPC – SP12 WJ4 - NV2 to remove loose paint and loose rust, (SSPC SP2 & SP3 hand or power tool cleaning maybe used in inaccessible areas or when water cleaning is not possible); or,

2. A low-pressure water blast of approximately 150 psi wet abrasive water cleaning using garnet abrasive and potable water. The standoff distance shall be no less than 6” and may be increased by the Contracting Officer if the existing tightly-adhered paint is unnecessarily being removed.

E. Hand and power tool cleaning will be necessary if all loose rust and other debris are not removed by water blasting. Pack rust shall be removed as much as possible as determined by the Contracting Officer from flat services, or unbounded seams along the edges of metal to metal; contact surfaces. If necessary, supplemental hand or power tool cleaning shall be used to remove pack rust. Remove all rust scale on any flat or unbounded surface and loose pack rust that has formed on steel members. Remove tight pack rust until the highest point is a minimum of 3 mm (1/8 inch) below the surface of the surrounding steel. Exercise care to avoid any nicking or gouging of the steel during rust removal. Nicks and gouges are cause for a suspension of activities until appropriate adjustments are made to prevent a reoccurrence.

Damage to steel by the Contractor shall be repaired by the Contractor as approved by the Contracting Officer, and at no cost to, the Government.

ACAD-194701 09 97 13.24 – 8

F. If there is a question of whether all loose paint has been removed, adhesion testing of the remaining “tightly adhered” paint shall be done in accordance with ASTM D 4541-02 Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers, with a minimum value of 300 psi.

G. Final surface preparation shall be in accordance with the paint manufacturer’s recommendations. A technical representative of the manufacturer shall be onsite for product application quality assurance, and to determine compliance with manufacturer's instructions and these Specifications. See Section 1.2 A. of this specification for additional requirements.

3.3 INTERIOR SURFACE PREPARATION

A. The existing paint coating on the interior of the tank was not tested but is assumed to be lead-containing paint. Unless the Contractor can show, through paint sampling and testing, that the existing interior coating does not contain lead, the Contractor shall assume that it is lead-containing paint. See Section 13 20 00 – Lead Based Paint Abatement for additional information.

B. Cap or seal all inlet, outlet, or overflow piping inside tanks prior to beginning any surface preparation or cleaning work to prevent entry of foreign material into the piping systems.

C. It is the Contractor’s responsibility to determine the original steel conditions in selecting the abrasive and equipment required for achieving the specified surface profile and cleanliness.

D. Sandblast to SSPC-SP10 (near white) all rusted and abraded interior areas. The remaining interior areas shall be cleaned to SSPC-SP7 (brush-off blast cleaned). Select type and size of abrasive to produce a surface profile that meets the coating manufacturer's recommendations for the particular coating to be applied.

E. Surface Preparation Inspection:

1. Provide the Contracting Officer a minimum 3 days' advance notice prior to start of surface preparation work or coating application work.

2. Perform such work only in the presence of the Contracting Officer, unless the

Contracting Officer grants prior approval to perform such work in his absence.

F. Paint cleaned surfaces the same day they are approved, unless dehumidification equipment is provided and properly operated on a continuous basis throughout surface preparation. Re-blast surfaces that have started to rust before they are painted.

G. Final surface preparation, including but not limited to, final cleaning, removal of residual particles, dust, oil, etc., and establishment of interior temperature and humidity shall be in accordance with the paint manufacturer’s recommendations. A technical representative of the manufacturer shall be onsite for product application quality assurance, and to determine compliance with manufacturer's instructions and these Specifications. See Section 1.2 A. of this specification for additional requirements.

3.4 EXTERIOR PAINT SYSTEM

A. All other exterior Work shall be completed prior to surface preparation and painting of the exterior of the tank.

ACAD-194701 09 97 13.24 – 9

B. All coatings shall be prepared and applied in accordance with the manufacturer’s recommendations.

C. Method of application, coating thickness, and minimum and maximum times to recoat shall be accordance with the manufacturer’s recommendations. Confirm that the recommended thickness was obtained using a paint thickness gauge and provide verification to the Contracting Officer.

D. Spray Applied: The spray equipment shall meet the recommendations set forth by the paint manufacturer’s for applying each specific paint. Each coat is to be applied uniformly and completely over the selected surface. All runs and sags shall be brushed out immediately or the paint shall be removed and the surface re-sprayed. Before spraying each coat, all areas such as corners, edges, welds, rivets, bolts, and nuts shall be pre-coated by brush.

E. Brush Applied: As a minimum, coating shall be brush applied onto all areas which cannot be properly spray coated for any reason. Brushes used in brush application shall be of a style and quantity that will permit proper application of paint. Round or oval brushes generally are considered most suitable for rivets, bolts, irregular surfaces, and rough or pitted steel. The brushing shall be done such that a smooth coat, as nearly uniform as possible, is obtained.

There should be no deep or detrimental brush marks. Paint shall be worked into all crevices and corners. Runs and sags shall be brushed out. During application of each coat, all areas such as corners, edges, welds, rivets, bolts, and nuts shall receive additional coating material to ensure the continuity of the coating

F. Curing shall be in accordance with the manufacturer’s recommendation.

3.5 INTERIOR PAINT SYSTEM

A. The Contractor shall provide and operate dehumidification and temperature control equipment to allow the interior of the tank to be cleaned and painted as recommended by the paint manufacturer.

B. Adequate illumination shall be provided while work is in progress. Whenever required by the inspector, the Contractor shall provide additional illumination and necessary support to illuminate all areas to be inspected. The inspector shall determine the level of illumination necessary for inspection purposes.

C. Ventilation shall be used to control potential dust and hazardous conditions within the tank.

Ventilation flow rates shall be in accordance with OSHA regulations and as required to reduce air contamination to non-hazardous conditions. Contractor shall maintain adequate ventilation during coating curing as recommended by the coating manufacturer.

D. Equipment used in the tanks after surface preparation begins shall not leave any oily residue from exhaust or other sources. Internal combustion driven equipment, other than that powered by natural or bottled gas, shall not be used.

E. Clean the entire tank interior prior to painting, as noted in Subsection 3.3 above.

F. Apply one coat of primer to the entire interior of the tank, including areas sandblasted to SSPC-

SP10 and to all welded seams. Then apply a finish coat to the entire interior of the tank.

ACAD-194701 33 16 50 – 10

TEMPORARY WATER SUPPLY SYSTEM

G. All coatings shall be prepared and applied in accordance with the manufacturer’s recommendations.

H. Method of application, coating thickness, and minimum and maximum times to recoat shall be accordance with the manufacturer’s recommendations. The total thickness of the coating system, including any remaining existing coating, shall be between 8 and 10 mils of total dry film thickness. Confirm that the recommended thickness was obtained using a paint thickness gauge and provide verification to the Contracting Officer.

I. Spray Applied: The spray equipment shall meet the recommendations set forth by the paint manufacturer’s for applying each specific paint. Each coat is to be applied uniformly and completely over the selected surface. All runs and sags shall be brushed out immediately or the paint shall be removed and the surface re-sprayed. Before spraying each coat, all areas such as corners, edges, welds, rivets, bolts, and nuts shall be pre-coated by brush.

J. Brush Applied: As a minimum, coating shall be brush applied onto all areas which cannot be properly spray coated for any reason. Brushes used in brush application shall be of a style and quantity that will permit proper application of paint. Round or oval brushes generally are considered most suitable for rivets, bolts, irregular surfaces, and rough or pitted steel. The brushing shall be done such that a smooth coat, as nearly uniform as possible, is obtained.

There should be no deep or detrimental brush marks. Paint shall be worked into all crevices and corners. Runs and sags shall be brushed out. During application of each coat, all areas such as corners, edges, welds, rivets, bolts, and nuts shall receive additional coating material to ensure the continuity of the coating.

K. Curing shall be in accordance with the manufacturer’s recommendation. For coatings subject to immersion, obtain full cure for completed system prior to immersion. Consult coatings manufacturer's written instructions for curing requirements. Do not immerse coating for any purpose until completion of curing cycle.

3.6 CLEAN UP

A. Unless otherwise specified, all removed material shall become the property of the Contractor and shall be disposed of outside the Park.

B. Immediately remove hazardous rubbish from project site. Place other construction debris in refuse containers at least daily. Dispose of refuse at least weekly, in a legal manner, at public or private dumping areas outside the Park. Do not burn or bury refuse inside the Park

END OF SECTION 09 97 13.24