Revised Section 09 90 00 has been attached. The attached ... 2 - IFB SA 1821.pdf · SSPC PA 1...

1

Addendum # 1

IFB SA 1821

Procurement Department

4 County Complex Court, Woodbridge, Virginia 22195-2266 Fax (703) 335-7954

April 25, 2018

IFB SA 1821 – Gainesville Water Storage Tank Rehabilitation

Addendum #2

THIS SOLICITATION IS HEREBY AMENDED AS FOLLOWS:

Revised Section 09 90 00 has been attached. The attached document was inadvertently

omitted in Addendum 1.

Acknowledgement: Bidders submitting a bid response for the above named solicitation shall take note of the

following changes, additions, deletions, clarification, etc., in the Contract Documents, which shall become a part of

and have precedence over anything shown or described in the Contract Documents, and as such shall be taken into

consideration and be included in the Bidder’s response. All other terms and conditions of the Invitation For Bid shall

remain unchanged.

Bidders must acknowledge receipt of this amendment by signing and returning this addendum with the bid response

prior to the bid deadline.

Authorized Signature Date

Name Printed Title

End of Addendum Number One

Gainesville WST Rehabilitation PAINTING OF STEEL TANKS

11147077 09 90 00-1 AND APPURTENANCES

SECTION 09 90 00

PAINTING OF STEEL TANKS AND APPURTENANCES

PART 1 GENERAL

1.01. SECTION INCLUDES

A. Interior and exterior cleaning, surface preparation, coating and finishing for painted surfaces.

B. References and Standards

C. Submittals

D. Containment System

E. Environmental Conditions

F. Surface preparation

G. Coating applications

H. Warranty

1.02. REFERENCES AND STANDARDS

A. The following is a list of standards which may be referenced in this Section:

1. ANSI/AWWA D 102, “AWWA Standard for Painting Steel Water Storage Tanks,” and the contract documents unless otherwise noted.

2. ASTM International:

a. ASTM D523-85, Test Method for Specular Gloss.

3. Code of Federal Regulations (CFR)

a. 29CFR 1910, Occupational Safety and Health Standards b. 29CFR 1926, Safety and Health Regulations for Construction c. 29CFR 1926.51, Sanitation d. 29CFR 1926.55, Gasses, Vapors, Fumes, Dust, and Mists e. 29CFR 1926.62, Lead f. 29CFR 1926.103, Respiratory Protection g. 29CFR 1926.451, Scaffolding h. 40CFR 261, Appendix II, EPA Toxicity Characteristic Leaching Procedure i. 40CFR 262, EPA, Standards Applicable to Generators of Hazardous Waste j. 40CFR 265 Subpart C, EPA, Preparedness and Prevention k. 40CFR 265 Subpart D, EPA, Contingency Plan and Emergency Procedures l. 40CFR 268 EPA, Land Disposal Restrictions m. 40CFR 302 EPA, Designation, Reportable Quantities and Notification.

4. American National Standards Institute/NSF International:

a. ANSI/NSF 61, Drinking Water System Components – Health Effects.

5. American Water Works Association:

a. AWWA D102, Coating Steel Water Storage Tanks.

b. AWWA C210, Standard for Liquid Epoxy Coating and Lining Systems for the Interior and Exterior of Steel Water Pipelines.



c. AWWA C652 – Disinfection of Water-Storage Facilities.

6. Occupational Safety and Health Act, R.S.O.1990 c. O.1, and Regulations for construction projects.

7. Environmental Protection Act, R.S.O. 1990 c. E.19, Regulations with regard to abrasive blast cleaning and painting procedures.

a. 3050, Acid Digestion of Sediment, Sludge, and Soils

b. SW 846, Test Methods for Evaluating Solid Waste – Physical/Chemical Methods

8. National Institute for Occupational Safety and Health

a. 7082, Lead

9. Steel Structures Painting Council (SSPC) – Current Revisions

SSPC PA 1 Workmanship Standards.

SSPC PA 2 Measurement of Dry Coating Thickness with Magnetic

Gauges.

SSPC PA 3 A Guide to Safety in Paint Application.

SSPC SP 2 Hand Tool Cleaning.

SSPC SP 3 Power Tool Cleaning

SSPC SP 10 Near-White Blast Cleaning

SSPC SP 11 Power Tool Cleaning to Bare Metal.

SSPC SP 6 Commercial Blast Cleaning.

SSPC SP 10 Near White Blast Cleaning.

SSPC Guide 6 (CON) Guide for Containing Debris Generated During Paint

Removal Operation.

SSPC Guide 7(DIS) Guide for the Disposal of Lead Contaminated Surface

Preparation Debris.

B. If a conflict occurs between any Codes or Standards, the most stringent code or standard shall apply.

1.03. DELIVERY, STORAGE, AND HANDLING

A. Shipping:

1. Protect shop painted surfaces during shipment and handling by suitable provisions including padding, blocking, and use of canvas or nylon slings.

2. Deliver paint materials to the Site in sealed, labeled containers with manufacturer's labels intact.

B. Storage:

1. The Contractor shall provide adequate job site storage for all coating materials, thinners, rags and waste materials, per the manufacturers shipping and storage

requirements, State and Local regulations, the Owner’s Representative’s

specifications, or as directed by the Owner and/or Owner’s Representative.

a. Adequate job site storage facilities shall be defined as any temporary job site trailer, building or enclosed van providing shelter and temperature protection

to stored coating materials, thinners and solvents which meet State and local

regulations.



b. Storage area shall provide protection from weather and temperature, below sixty degrees Fahrenheit (60°F).

c. Storage area shall be maintained in a safe, neat, and clean manner and free from fire, explosion or other hazards.

2. Store materials not in use in tightly covered containers in well-ventilated areas with ambient temperatures continuously maintained at not less than 45 degrees F.

a. Maintain containers in clean condition, free of foreign materials and residue.

1.04. SUBMITTALS

A. Submit the following in accordance with SECTION 01 30 00 – SUBMITTALS, a minimum of ten (10) business days after the issuance of the Purchase Order. Mobilization at the tank

is prohibited until all of the following items have been submitted and approved:

1. Certified statement of Lead-free Coatings.

2. For each coating system, provide copies of the coating paint manufacturer's technical Data Sheets, associated Material Safety Data Sheets (MSDS), and identify the

coating color for each Product used in coating that demonstrates compliance with

specification. MSDS sheets shall be attached to the associated coating product and

not submitted separately.

3. The Contractor must submit a data sheet complete with graduated scale or curve from the paint supplier with curing characteristics and recommendations for immersion

service in potable water tanks and for exterior service.

4. The data sheet and scale curve must include specific cure time for the coating to be used over a wide range of temperature and humidity conditions at various dry film

thicknesses (DFTs). This information is vital for proper monitoring of paint cure

during non-ideal environmental conditions.

5. Indiscriminate submittal of manufacturer's literature only is not acceptable.

6. Provide a detailed chemical and gradation analysis for each proposed abrasive material.

7. Manufacturer's Quality Assurance: Submit the manufacturer's certification that coatings meet requirements of NSF 61, comply with specified requirements, and are

suitable for intended application.

8. Written Containment Plan including all items listed below describing methods for protection of adjacent areas to prevent damage or contamination from the work

procedures involved.

9. Ventilation system.

10. Dehumidification systems.

11. Blast abrasive recovery systems.

12. Provide Samples of the selected abrasive and/or abrasive/admixture to the Owner and/or Owner’s Representative for testing and acceptance prior to start-up of the

project. Random field-testing of the abrasive shall be done, as directed by the Owner

to ensure the abrasive used complies with these requirements. containment system



1.05. DETAILS OF THE WORK

A. Any particulars of the Work provided herewith are given only for the guidance of the Contractor who will be held responsible for securing all necessary dimensions and details.

The intent of these specifications is to provide for a quality coating system in the areas

specified in the Contract Documents.

B. The Contractor, at its option, may take additional coating samples and provide testing of these samples for its use and information in determining. If sampling is desired by the

Contractor, at least three (3) samples shall be taken a minimum of four (4) feet apart. All

costs associated with additional sampling and testing shall be borne by the Contractor.

1.06. CONTAINMENT SYSTEM (TYPE C)

A. The Contractor shall be responsible for any such loss or damage from spray fallout, overspray, drifting spray, or any damage resulting from performance of the Work.

B. Contractor shall adequately protect, shield, or cover all structures, stores, machinery, equipment, and openings, to prevent damage or contamination from the Work procedures

involved.

C. Contractor shall be responsible for full containment of the structure during abrasive blasting and coating operations, including negative air dust collection equipment to prevent the drift

of abrasive, existing paint removed, and paint overspray onto any adjacent property (i.e.,

buildings, cars, people) streets or structures. The containment plan shall meet the emission

control requirements of a Class 2 system as specified in SSPC-Guide 6 (CON), Section

4.2.2.2. This includes containment cover of the roof area during abrasive blasting and

coating operations.

CONTAINMENT AND DISPOSAL PER LOCAL, STATE, AND FEDERAL

REGULATIONS SHALL BE MANDATORY.

1. Outline all the details, equipment, impervious ground covers, and other pertinent information to be employed during exterior, interior, and valve vault surface

preparation activities.

2. When Record Drawings are provided the full Containment Plan shall be evaluated, reviewed, signed, and sealed by a Professional Engineer licensed in the

Commonwealth of Virginia hired by the Contractor.

a. This evaluation shall include, but not limited to, a mathematical review of the structural adequacy of the containment attachments and verification that the

structure will not be subjected to structural overload conditions due to the

dead load of the containment structure and wind loading upon the structure.

b. Calculations from this mathematical review must be submitted to the Owner and/or Owner’s Representative as part of the full containment plan.

3. This containment plan must be in conformance with the Commonwealth of Virginia of Virginia Department of the Environment.

4. Screens used for containment shall be inspected and accepted for use by the Owner, Inspector or Owner's Representative. Wind screens used for containment shall be

solid screens. They shall be coated to prevent the contamination by lead dust, UV-

Stabilized, weather and solvent resistant.



5. The Contractor shall be fully responsible to provide one hundred percent (100%) impervious ground coverage in all areas adjacent to the structure for the purpose of

ensuring the recovery of all spent abrasive, removed paint, and debris from the

abrasive blast operation.

a. Ground cover shall consist of reinforced plastic or canvas tarps sufficiently overlapped and secured to prevent contamination of the ground by contact of

the abrasive and paint chips debris.

6. The Contractor shall, furnish and maintain adequate Dust Collection during all the abrasive blast cleaning and until the surface area (exterior and/or interior) is clean to

the satisfaction of the Owner and/or Owner’s Representative for coating application.

a. The dust collection system shall at meet the requirements of a Type Jl Air Filtration System as specified in SSPC-Guide 6 (CON), Section 5.4.5.1.

b. All compressed air supply shall be properly equipped with suitable after coolers, oil and moisture separators to prevent contamination of abrasives

and/or blasted surfaces.

c. Separators shall be of the continuous bleeding or automatic dumping type. In order to prevent contamination of abrasives and/or blasted surfaces, it is

recommended that the separators be installed between the compressor air

outlet and the blasting pot compressed air inlet.

d. Disposal of Waste materials generated by the Contractor or his Subcontractor(s) will be as specified in SECTION 01 40 00 – QUALITY

CONTROL AND MONITORING.

7. Stop abrasive blast cleaning in sufficient time to remove all dust, spent abrasive and other foreign matter from and around all blasted surfaces (including rigging and

equipment) and to allow the atmosphere to clear before any coating is performed. No

abrasive material shall consolidate during blasting, and shall be either cleaned up

weekly and removed from site, or placed in a container daily to achieve a clean site.

a. Removal of these materials shall be by clean brush or suitable industrial vacuum with particular attention given to welds, pockets, poorly accessible

areas or any overhead areas. A daily observation of the separators and

compressed air supply will be required to insure cleanliness of all

compressed air supplied for abrasive blasting. This test will be performed by

a blotter test. A clean white blotter is held no more than eighteen inches (18")

from the air supply, downstream of moisture and oil separators.

1) The air supply is directed at the blotter for approximately two (2) minutes. The blotter is then examined visually for signs of oil and

moisture. A clean blotter at test completion means a successful

passing of the air supply test.

2) Failure to pass the compressed air test will be justification for rejection of abrasive blasting performed that day. The Owner and/or

Owner’s Representative's discretion will be final in this

determination.



1.07. ENVIRONMENTAL REQUIREMENTS

A. No surface preparation or coating application work shall be performed under unfavorable weather conditions, or when surface and ambient temperatures are outside the temperature

ranges recommended by the coating product manufacturer as identified on the product data

sheets, unless the work is adequately protected, and then only with the specific acceptance of

the Owner and/or Owner’s Representative.

B. No coating shall be applied with it is expected that the relative humidity will exceed eighty-five percent (85%) or when the air temperature will drop below forty degrees Fahrenheit

(40°F) within eight (8) hours or above one hundred degrees Fahrenheit (100ºF) after the

application of the coating.

C. Do not apply coating materials when the surface to be coated is less than 5 degrees Fahrenheit above the dew point.

D. Coating shall not be applied to dusty, wet, or damp surfaces, and shall not be applied in rain, snow, fog, or mist.

E. Use a surface temperature thermometer in intimate contact with the steel for monitoring purposes.

F. The Owner intends to monitor temperature and humidity to ensure the Contractor’s compliance with the listed conditions.

G. The Contractor shall record the relative humidity, air temperature, and surface temperature upon commencement and completion of coating application for each day said work is

undertaken. The daily log shall be submitted to the Owner and/or Owner’s Representative

for comparison with the Owner’s data and verification of compliance.

H. Provide adequate explosion-proof lighting during surface preparation and coating operations.

1. This lighting shall be sufficient to illuminate clearly the working area without shadows. Provide lighting level equivalent to 80 foot candles measured mid height at

substrate surface in accordance with SSPC Guide 12.

I. Ventilation shall be as described in SECTION 01 40 00 – QUALITY CONTROL AND MONITORING, of the suction type and shall be sufficient capacity to maintain throughout

the tank interior a clear atmosphere that is well below explosive and toxic limits

J. Painting may be continued during inclement weather only if the areas and surfaces to be painted are enclosed and heated within the temperature limits specified by the coating

manufacturer during application and drying periods.

K. Painting shall be suspended when wind velocities exceed that which will allow for a quality application of exterior coatings and where coating could be carried off Site by the wind. If

conditions are questionable, the Owner and/or Owner’s Representative shall make the

decision, and the Contractor shall accept his interpretation as final and binding.

L. Forced air ventilation shall be supplied to tank interior for a continuous period until at least 48 hours after the final coat has been applied. Ventilation, at a minimum, shall be in

accordance with AWWA D102. If supplemental heating or dehumidification is required to

aid in curing the coatings, the Contractor shall furnish and operate the equipment at its own

expense as necessary and required to assist in the curing of the coatings.

M. If working conditions are not considered acceptable by the Owner and/or Owner’s Representative, the Contractor shall accept the Owner and/or Owner’s Representative’s

interpretation as final.



N. Owner intends to record environmental conditions including temperature and humidity to assure Contractor’s compliance with these conditions.

O. Prior to commencing work each day the Contractor shall record the following conditions:

1. Relative humidity

2. Air temperature

3. Surface temperature.

1.08. WARRANTY AND REPAIR

A. Warranty

1. See Specification Section 01 80 00 TANK MAINTENANCE, COORDINATION AND PROCEDURES for details and requirements on full Warranty period.

2. Warranty: A written warranty shall be supplied to the Owner by both the coating supplier (manufacturer) and coating applicator (Contractor). It shall state the

warranty period and everything included in the warranty period as a summary. This

includes washouts and any touchups required.

3. Submit the manufacturer's warranty against material deterioration due to system incompatibility, peeling, blistering, uneven fading or color change, excessive surface

erosion or weathering or other forms of coating failure which can be directly

attributed to an abnormal coating system breakdown (the "Manufacturer's

Warranty").

4. The Manufacturer's Warranty shall also include loss of gloss which shall be less than 24 units as measured by a gloss meter in accordance with ASTM 532-89 with

60 degree geometry. Exterior coating system shall not chalk in excess of a rating of 8

as measured in accordance with ASTM D4214, Method A. Change color more than

five dE Hunter units as determined in accordance with ASTM D2244 by comparing

the affected exposed coating cleaned with water and a soft cloth with the unexposed

Original Project Color Standards maintained by manufacturer and the Owner.

5. Submit the Contractor's warranty against system deterioration due to defects in surface preparation or coating application due to faulty workmanship, or failure to

follow the specifications and/or the manufacturer's instructions as set forth in the

manufacturer's data sheets, for the warranty period.

6. The Contractor's warranty shall warrant against product failures and include the repair of product failures unless incorporated in the Manufacturer's Warranty.

7. The coating warranties shall be provided by the Contractor in its entirety for the minimum duration indicated. Any damage to the coating caused by third party works

during the warranty period will be documented and assessed by the Owner to

determine the impact to the coating warranties provided under this Contract.

8. The maintenance of the tank shall be in accordance with the Owner's current Maintenance Program and will be performed by the Contractor.



PART 2 PRODUCTS

2.01. QUALITY ASSURANCE

A. Qualifications:

1. Coating Manufacturer's Qualifications:

a. Specializes in the manufacture of coatings with a minimum of 10 years of successful experience in the application of the specified Product.

b. Capable of demonstrating successful performance on comparable projects.

2. Applicator Qualifications:

a. Experienced in the application of specified coatings for a minimum of 5 years on projects of similar size and complexity to this Work.

b. Applicator's Personnel: Applicator employs persons trained for the application of the specified coatings.

3. Workmanship

a. All work performed by the Contractor shall be of the best quality throughout and in accordance with the requirements of SSPC PA 1, unless otherwise

specified in the Contract Documents. Any dispute or difference of opinion as

to the interpretation of these specifications or regarding the quality of

material or workmanship shall be left to the decision of the Owner and/or

Owner’s Representative, whose decision shall be final and binding.

2.02. MANUFACTURERS

A. Approved Manufacturers and Coating Systems:

1. Tnemec Company, Inc. or accepted equal:

2.03. COATINGS

A. Performance Criteria:

1. Adhesion to Steel: ASTM D4541 Method E, Type 5, 1,900 psi minimum.

2. Cathodic Disbondment: ASTM G95 Method A (30 day), 5 mm maximum.

3. Abrasion Resistance: ASTM D4060, CS17 Wheel, 0.18 g loss maximum 1 kg weight, 1,000 revs.

4. Humidity Resistance: ASTM D4585, no blistering, cracking, or delamination of the system after 2,000 hours exposure.

5. Immersion: ASTM D870, no blistering, cracking, or delamination of the system after 2 years continuous immersion.

6. Salt Spray: ASTM B117, no blistering, cracking, or delamination of the system and no more than 1/64 inch of rust creepage after 9,000 hours exposure and 1/4 inch of

rust creepage after 20,000 hours exposure.

7. This tank is located in a designated air “Attainment area.” As such, only low Volatile Organic Compound paint is permitted.

B. All coating materials systems shall be supplied by the same manufacturer and obtained from the same batch.



C. Coating shall be supplied at the Site in new, unopened containers. Materials older than the manufacturer's published shelf life shall not be accepted. Damaged containers will not be

accepted. If requested, the Contractor shall provide the Owner and/or Owner’s

Representative with a 1 gallon sample of each different lot of material proposed for the

Work. Upon the Owner and/or Owner’s Representative's request, the Contractor shall

provide the Owner and/or Owner’s Representative with certified copies of the

manufacturer's quality control testing records.

1. Material Lots: Different lots of material shall be kept to a minimum consistent with the manufacturer's production facilities for the Product. Material shall be delivered to

the Site in new, unbroken containers bearing the designated name, specification

number, color, directions for use, manufacturer, and date of manufacture with proof

of NSF 61 certification for all inside coating systems.

2. Storage of Materials: Coating, patching, and caulking materials shall be stored in a location that is protected from the elements, well ventilated, and free from excessive

heat, open flame, and other sources of ignition. The storage area shall be such that the

Contractor will be able to maintain ambient conditions in accordance with the

manufacturers' storage requirements.

3. Old or Damaged Materials: Materials older than the manufacturer's published shelf life shall not be accepted. Previously opened and damaged containers will not be

accepted. All coating materials for any system shall be supplied by the same

manufacturer.

4. Material Sample: If requested, the Contractor shall provide the Owner and/or Owner’s Representative with a 1 gallon sample of each different lot or batch of

material proposed for the work. Upon the Owner and/or Owner’s Representative's

request, the Contractor shall provide the Owner and/or Owner’s Representative with

certified copies of the manufacturer's quality control testing records.

5. Statement of Material Supplier: The Contractor shall state the coating supplier to be used at the time of tendering unless otherwise specified in this Section.

6. Material Identification: All prime, intermediate, and finish coating materials shall be supplied in different color shades and shall be clearly marked on each container as to

the material function and color.

2.04. SURFACE COATING MATERIALS

A. Interior Dry Metal Surfaces:

1. Primer Coat: Pota-Pox N140 or N140E-15BL (Tank White)

2. Stripe Coat: Pota-Pox Plus N140 or N140E-1255 (Beige)

3. Intermediate Coat: Pota-Pox Plus N140 or N140E-1255 (Beige)

4. Finish Coat: Pota-Pox N140 or N140E-15BL (Tank White)

5. Epoxy Caulk: 63-1500 Filler and Surfacer

B. Interior Wet Metal Surfaces and Valve/piping Surfaces:

1. Primer Coat: HydroZinc 94 H2O (Greenish-Gray)

2. Stripe Coat: Pota-Pox Plus N140 or N140E-15BL (Tank White)

3. Intermediate Coat: Pota-Pox Plus N140 or N140E-1255 (Beige)



4. Finish Coat: Pota-Pox N140 or N140E-15BL (Tank White)

C. Exterior Metal Surfaces:

1. Primer Coat: HydroZinc 94 H2O (Greenish Grey)

2. Stripe Coat: Endura-Shield II Series 1075 (Same as Intermediate Coat)

3. Intermediate Coat: Endura-Shield II Series 1075 (shade of contrast)

4. Finish Coat: Hydroflon Series 700 (Robins’ Egg Blue or color selection by Owner)

5. Logo: Hydroflon Series 700 (Pantone PMS 2935 or color selection by Owner)

6. Roof Non-Slip Additive (roof interior to handrail only): Glass Beads 212

7. Anti-Graffiti Top Coat (bottom 10 feet of exterior wall): Metallic Clearcoat 1079-

0762

D. Miscellaneous Exterior Metals

1. Bollards and Hydrant: Rustoleum (safety yellow)

2. Miscellaneous exterior metals: Rustoleum (original color or color selection by Owner)

E. Structural Epoxy Caulk

1. 63-1500 Filler and Surfacer

2. SIKA/SikaFlex 1A

2.05. GASKET MATERIAL

A. Use ¼-inch thick flat style gasket for manways requiring flat gaskets, composed of either a Neoprene or an EPDM material with a durometer hardness of 50 on the Shore A scale.

B. Use ¾-inch, round, solid core, gasket material for 24-inch diameter round-type gaskets. Material shall be Buna-N Rubber with a durometer hardness of 50 on the Shore A scale.

2.06. NON-SHRINK CEMENT-BASE GROUT

A. Grout shall be non-shrink cement-based grout. The grout must show no shrinkage under ASTM C-827, must show no shrinkage under CRD-C-621, and must contain no expansive

cements or metallic powders such as aluminum or iron filling. Installation shall follow

Manufacturer’s written recommendations or as directed by the Owner and/or Owner’s

Representative.

2.07. ABRASIVES

A. The abrasive used shall be of the type that is graded as to proper size, shape and hardness. It shall be free of contaminants and shall not embed itself in the blasted surface. Silica sand,

Flint, Garnet or Quartz type abrasives shall be chemically washed, dried, dust, dirt and fines

free, resistant to fracture (shattering), and contain no leachable contaminates. Synthetic

(non-metallic and non-siliceous) abrasives such as Silicon Carbide, Aluminum Oxide, and

Refractory Slag products shall meet the above criteria.

B. The use of reduced or dust free abrasive blasting is required.

C. Do not reuse sand or spent abrasives.



PART 3 EXECUTION

3.01. SURFACE PREPARATION

A. General

1. The Contractor shall not proceed with surface preparation and coating application until antenna mast, permanent relocation of communication equipment and removal

of communication supports on the tank as described in the Contract Documents has

been completed.

2. Depending on existing coating condition and degree of surface preparation, commence the painting schedule at the appropriate stage to maintain the specified

total dry film thickness. As a minimum requirement apply one full finish coat of the

specified thickness over the entire contract area.

3. Apply coating materials in successive coats in accordance with the specification and directions of the manufacturer to attain the required film thickness for each system.

4. Prior to any field painting grind all welds and sharp edges, including those revealed by blast cleaning, prime, and stripe with a topcoat material of a color contrasting with

both the primer and second coat colors. Apply by brush and work in well on all rough

areas that cannot be successfully ground smooth.

a. If the allowable recoating period, as specified by the coating manufacturer, has elapsed since the application of the prior coat, the entire surface shall be

lightly abraded in accordance with the manufacturer's recommendations

(brush-off abrasive blast, power sanding, hand sanding, etc.). After light

abrasion, the entire surface shall be cleaned in accordance with SSPC SP 1 to

remove any surface contaminants.

b. Prepare surfaces for over coating in conformance with the paint manufacturer's recommendation. Use brush blasting if the recoat window has

expired and the manufacturer so recommends.

c. Do not mix partial paint kits. Maintain a sufficient supply of small volume kits to supply any requirement for small batches.

3.02. INTERIOR TANK PRE-CLEANING

A. Prepare interior surfaces of tanks in accordance with NACE Standard SP0178 (formerly RP0178).

B. Prior to commencement of interior repairs, the Contractor shall pre-clean the interior of the elevated tank with pressure water wash down.

C. All water, silt/solids and any other foreign material shall be removed from the tank prior to commencing interior Work. The Contractor shall assume a silt/solid accumulation depth of

35 inches from the lowest wet interior floor elevation of the tank. Measurements will be

made at the time of initial draining. If solids are in excess of 35 inches, the Contractor will

be requested to provide a quotation for the additional effort for cleaning.



D. The Contractor shall utilize a vacuum excavation (vac-ex) truck for the cleaning process. Water and silt/solids from the tank interior may be directed to the overflow line and

discharged to the nearest downstream sewer manhole. The Contractor shall implement the

necessary measures to ensure that the silt/solids do not proceed further downstream. The

silt/solids shall not be discharged to the environment.

E. Tank pre-cleaning shall be coordinated with the Owner for the operation of all valves.

3.03. EXTERIOR TANK PRELIMINARY CLEANING

A. Prior to commencement of repairs, prepare exterior surfaces in accordance with the requirements of CSA B95, Surface Texture and the coating manufacturer's instructions.

B. Remove accumulations of bird droppings, sediment, iron oxide precipitate, etc. by high pressure water cleaning, blast cleaning, or other suitable method.

3.04. SURFACE PREPARATION FINAL

A. Oil and Grease:

1. Prior to blast cleaning, the entire interior wet surfaces and valve/piping vault surfaces shall be cleaned of all paint, grease, oil, rust, chlorides, mill scale, and other foreign

or loose material.

2. Prior to blast cleaning, exterior surfaces shall be cleaned of all paint, grease, oil, rust, chlorides, mill scale, and other foreign or loose materials before any primer or

coating is applied.

B. Blast Cleaning:

1. Blast clean all interior wet and exterior steel surfaces, including valve/piping vault surfaces, in accordance with the requirements of SSPC SP10/NACE 2, Near White

Blast Cleaning using clean dry abrasive to produce a surface profile of 2.0-3.5 mils,

or profile as recommended by the coating supplier. Before any primer or paint is

applied, metal surface shall be completely dry, dust free, inspected, and accepted by

the Owner and/or Owner’s Representative.

2. Compressed air supply shall be properly equipped with suitable after cooler, oil and moisture separators to prevent contamination of abrasives and/or blasted surfaces.

a. Separators shall be of the continuous bleeding or automatic dumping type. In order to prevent contamination of abrasives and/or blasted surfaces, it is

recommended that the separators be installed between the compressor air

outlet and the blasting pot compressed air inlet.

3. Stop abrasive blast cleaning in sufficient time to remove all dust, spent abrasive and other foreign matter from and around all blasted surfaces (including rigging and

equipment) and to allow the atmosphere to clear before any coating is performed.

a. Removal of spent abrasive and removed surface materials shall be by clean brush or suitable industrial vacuum with particular attention given to welds,

pockets, poorly accessible areas or any overhead areas.

4. Apply the first coat to all prepared surfaces the day of the blast, except that there shall remain uncoated a 3 to 4 inch boarder of blasted steel at the end of each work

day.

a. When blast cleaning resumes the following workday, this boarder shall be reblasted up to, and including, 1 to 3 inches of the previous primer coating.



5. Take extra care during all blasting operations, to prevent damage or abrasive impingement upon previously applied coated areas.

6. A prime coat shall be applied within eight (8) hours after abrasive blasting. When the humidity exceeds eighty percent (80%), the prime coat shall be applied within four

hours after abrasive blasting.

a. If conditions are questionable, the Owner and/or Owner’s Representative shall make the decision, and the Contractor shall accept their interpretation as

final and binding.

7. Any areas where grinding is performed after abrasive blasting shall be spot blast cleaned or power-tool cleaned to bare metal as required under this contract for

surface preparation before the primer is applied.

8. Any areas where grinding is performed after primer paint has been applied shall be power-tool cleaned to bare metal as required under this contract for surface

preparation and then spot primed prior to rusting or application of the next coat of

paint.

9. For interior surfaces and valve/piping vault surfaces, all power tool cleaning shall be performed in accordance with SSPC-SP 11 “Power-tool Cleaning to Bare Metal”

Standard. A minimum surface profile of 1.5 mils shall be achieved for all power-tool

cleaning.

10. For exterior surfaces, if the nameplate has previously been coated, the Con tractor shall replace the nameplate and reinstall in its original position. Details are included

in Section 10 43 10 – SIGNS.

11. A daily observation of the separators and compressed air supply will be required to insure cleanliness of all compressed air supplied for abrasive blasting. This test will

be performed by a blotter test. A clean white blotter is held no more than eighteen

inches from the air supply, downstream of moisture and oil separators.

a. The air supply is directed at the blotter or approximately two minutes. The blotter is then examined visually for signs of oil and moisture. A clean blotter

at test completion means a successful passing of the air supply test.

b. Failure to pass the compressed air test will be justification for rejection of abrasive blasting performed that day. The Owner and/or Owner’s

Representative’s discretion will be final in this determination.

C. Spot Machine Tool Cleaning:

1. Power tool clean interior dry steel surfaces, where localized areas of corrosion on the condensate roof, lower drywell and underside of bowl, in accordance with the

requirements of SSPC SP11, Bare Metal Power Tool Cleaning to produce a surface

profile of 2.0-3.5 mils, or profile as recommended by the coating supplier. Before any

primer or paint is applied, metal surface shall be completely dry, dust free, inspected,

and accepted by the Owner and/or Owner’s Representative.

D. Miscellaneous Exterior Painting:

1. Hydrants, bollards, valve boxes and valve box cover shall be cleaned and surfaces prepared in accordance with the coating manufacturer’s recommendation, and as a

minimum to remove any existing coatings that have lost adhesion.



3.05. APPLICATION

A. General

1. Dry Film Thickness (DFT) frequency measurements shall be taken in accordance with SSPC PA2. Each coating product (primer, intermediate, & finish coat) will

require at least the minimum DFT before proceeding to the next coating application.

B. Interior Dry Metal Surfaces:

1. Primer Coat: 2.5 to 3.5 mils dry film thickness (DFT), with any individual spot measurement a minimum of 2.5 mils DFT.

2. Intermediate Coat: 3.0 to 5.0 mils dry film thickness. The DFT of the primer plus intermediate coat at any individual spot measurement shall be a minimum of 6.5 mils

DFT. Intermediate coat color shall be one shade lighter or darker than the finish coat.

3. Finish Coat: 4.0 to 6.0 mils DFT.

4. Total DFT of combined primer, intermediate, and finish coats shall be in the range of 9.5 mils to 11.5, with any individual spot measurement a minimum of 9.5 mils DFT.

C. Interior Wet Metal Surfaces and Valve/piping Surfaces:


2. Stripe Coat: Brush only to cover.

3. Intermediate Coat: 3.0 to 5.0 mils dry film thickness. The DFT of the primer plus intermediate and stripe coats at any individual spot measurement shall be a minimum

of 6.5 mils DFT. Intermediate coat color shall be one shade lighter or darker than the

finish coat.



D. Exterior Metal Surfaces:


2. Stripe Coat: Brush only to cover.

3. Intermediate Coat: 3.0 to 5.0 mils dry film thickness, The DFT of the primer plus intermediate coat at any individual spot measurement shall be a minimum of 5.5 mils

DFT. Intermediate coat color shall be one shade lighter or darker than the finish coat.



3.06. WELDING AND CORRECTION OF METAL DEFECTS

A. Correct steel and fabrication defects revealed by surface preparation.

B. Ensure all welds are continuous.

C. Remove all welding residue (including flux, spatter and slag).

D. Round sharp edges and corners of welds to a smooth contour.



E. Smooth weld undercuts and recesses.

F. Grind down porous welds to pinhole-free material.

G. Pitted areas shall be blast cleaned to a SSPC SP 10 standard near white quality, then thoroughly inspected by the Owner and/or Owner’s Representative. Pits deeper than 5 mm

shall be filled with a coating system manufacturer's approved epoxy polyamide compound

after the prime coat has cured but prior to application of the second coat. Blast cleaning may

be necessary in localized areas to institute this procedure.

H. After cleaning, tank surfaces shall be upgraded to meet the requirements of NACE standard SP0178. Particular attention shall be given to the welds and adjacent plates. All old weld

scabs and remains of old erection clips shall be removed and ground smooth.

I. Accumulation of bird droppings, sediment, iron oxide, etc., shall be removed by high pressure water cleaning, blast cleaning, and/or other suitable methods approved by the

Owner and/or Owner’s Representative.

J. Pit Repairs - Interior Wet

1. All pitted areas shall be repaired by welding and grinding.

2. Pit weld repair of pitted areas in the tank bowl plates, cone, and shell surfaces below the High Water Level (HWL) by grinding and/or welding to a smooth, flush

condition.

3. For bidding purposes it is estimated that it will require approximately forty (40) man-hours of welding and grinding.

4. This work will be monitored and verified by the Owner and/or Owner’s Representative in the field.

a. Increases or decreases in the amount of the work and the appropriate contract price adjustments will be made per the Contract Documents.

5. Pitted areas beyond ten percent (10%) of the original plate thickness, shall be repaired by welding and then grinding smooth to a flush condition.

6. All surface repairs shall be performed in accordance with the requirements.

K. Surface Preparation - Interior Wet

1. Remove all existing erection bracket scab marks and weld spatter on the interior wet surfaces of the tank, by air arc gouging, cutting torch, grinding and/or welding to a

smooth, flush condition.

2. For bidding purposes it is estimated that it will require approximately forty (40) man-hours to perform this work.

3. This work will be monitored and verified by the Owner and/or Owner’s Representative in the field.

4. Increases or decreases in the amount of the work and the appropriate contract price adjustments will be made per the Contract Documents.

5. All excessive undercutting along erection scab marks shall be repaired by welding and grinding.



6. Grinding to remove an erection scab mark, where the grinding gouges into the base metal beyond ten percent (10%) of the original plate thickness, shall be repaired by

welding and then grinding smooth to a flush condition.

7. Included in, but not limited to, this work are the radius grinding of all sharp edges on all surfaces including manway curbs and covers, irregularities, erection or painter's

rigging brackets, and miscellaneous weld repairs.

8. All surface repairs shall be performed in accordance with the requirements of Appendix I and A WW A D-100, Current Revision.

3.07. COATING - GENERAL

A. Mixing

1. Multiple Component Coatings:

a. Prepare using each component as packaged by paint manufacturer.

b. No partial batches will be permitted.

c. Do not use multiple component coatings that have been mixed beyond their pot life.

d. Furnish small quantity kits for touch-up painting and for painting other small areas.

e. Mix only components specified and furnished by paint manufacturer.

f. Do not intermix additional components for reasons of color or otherwise, even within the same generic type of coating.

B. Colors: Formulate paints with colorants free of lead, lead compounds, or other materials that might be affected by presence of hydrogen sulfide or other gas likely to be present at the

Site.

C. Coating Uniformity:

1. Apply all coatings uniformly without sags, foreign materials contamination, or other blemishes.

2. At the discretion and direction of the Owner and/or Owner’s Representative remove defects and repair before proceeding with subsequent coat.

3. Thoroughly mix all ingredients in any container prior to use and agitate often enough during application to keep the pigment in suspension.

D. Application Method:

1. Apply all coatings by spray according to the manufacturer's published instructions unless prohibited under the OHSA/VOSH air attainment requirements.

2. Where spray is prohibited, use roller application except that brushing will be accepted where rolling would not be effective. When brush application is required,

application shall be in a single direction and smoothed at right angles to the first

brush stroke to produce complete coverage and uniform thickness. This method shall

be considered “a single coat” as applied to this specification.

3. No lap or brush marks shall be visible and uniform coating with a brush around rivet heads, weld seams, scab marks, plate overlaps, joints, and other irregularities on the

coated surface.



4. All rollers used shall be lint free.

5. Allow each coat to dry thoroughly prior to applying the next coat.

6. Thoroughly mix all ingredients in any container prior to use and agitated often enough during application to keep the pigment in suspension.

7. Mix and thin coatings, including plural-component materials, only in accordance with the manufacturer's instructions and at the approval of the Owner and/or Owner’s

Representative.

8. Keep containers closed when not in use to avoid contamination.

9. Do not use mixed coatings beyond pot life limits.

10. Use application equipment, tools, pressure settings, and techniques in accordance with the manufacturer's instructions.

11. Apply non-slip additive in accordance with manufacturer’s recommendations, within the area contained by the 30 foot handrail.

12. Exterior Finish coating and all Interior Dry coatings shall be applied by brush and roller only.

E. Dry Film Thickness (DFT)

1. Measure the dry film thickness measurements using a Type I or Type II fixed magnetic flux gage using PosiTector or Quanix Type 2, or equal and according to the

requirements of SSPC PA2.

2. Dry film thickness frequency shall be measured and evaluated in accordance with the requirements of SSPC PA2, and acceptable tolerances as identified therein.

3. Verify calibration of Type I gages before, during and after use, using NIST standard plates.

4. Verify calibration of Type II gauges before, during and after use, using either traceable standards (test blocks) or plastic shims (reference the manufacturer's

instructions).

5. Calibration of magnetic gages should be done in accordance with SSPC PA2, "SSPC method for measurement of dry paint thickness with magnetic gauges".

F. Spray Pressure:

1. Regulate pressures on the spray gun to achieve optimum atomization of the paint at the lowest possible pressure. Excessive dry spray, or overspray, will not be accepted.

G. Spray Technique:

1. Overlapping (50%) vertical passes followed by overlapping (50%) horizontal passes (or vice versa) with each spray coat to obtain uniform film thickness.

2. Apply a complete wet coat in each operation.

3. If sagging occurs use a mist coat/full coat application to obtain the desired wet film thickness per coat.

4. Coat all brackets, nozzles, irregular surfaces, etc. first and blend the surrounding regular surfaces into these areas.



5. The Contractor shall take all necessary precautions to avoid spray

6. When spraying is used, all welds, edges, inside corners, and structural members shall be painted first using a brush (stripe coated) in a manner not to exceed the maximum

DFT for the product being applied and the maximum DFT of the total system as

recommended by the coating manufacturer.

H. Curing:

1. Strictly follow manufacturer's published curing schedule, and Steel temperatures, rather than ambient, are to be the basis of cure times.

I. Metal, Valve and Piping Surfaces:

1. Apply by brush one (1) additional coat of intermediate to all seams, welds, bolt assemblies, plate overlap seams, and other irregularities in the surface.

2. Intermediate coat color to be one shade lighter than the finish coat color.

3. Interior coating, valve and piping surface application shall be performed by air or airless spray application methods except for the brush stripe coat as stipulated in

Paragraph 4 above.

J. Successive Painting

1. Apply the first coat to all prepared surfaces the day of the blast, except that there shall remain uncoated a three-inch (3") to four-inch (4") border of blasted steel at the

end of each work day.

2. When blast cleaning resumes the following workday, this border shall be reblasted up to and including one inch (1") to three inches (3") of the previous primer coating.

3. Take extra care during all blasting operations, to prevent damage or abrasive impingement upon previously applied coated areas.

4. A prime coat shall be applied within eight (8) hours after abrasive blasting. When the humidity exceeds eighty percent (80%), the prime coat shall be applied within four

(4) hours after abrasive blasting.

3.08. EXTERIOR AND INTERIOR SURFACE PREPARATION

A. Proposed Plans

1. Written proposals are to contain, but not be limited to, descriptions of:

a. Ventilation system, including forced air as described in SECTION 01 40 00 – QUALITY CONTROL AND MONITORING.

b. Dehumidification systems.

c. Blast abrasive recovery systems.

d. Containment systems.

B. Protected Areas

1. Booster Pump station, vents, overflow screens, ladder safety equipment, aircraft warning or obstruction lights, interior lights, nameplates, and any other miscellaneous

radio and antenna equipment shall be protected from coating and overspray.

2. All existing equipment shall be protected from dust, dirt, blasting material and overspray from paints and coatings. The Contractor is responsible for any damage to

the Owner’s equipment caused by construction and painting operations.



3.09. GRAPHICS

A. The Contractor shall provide a price under Item # 14 in the Bid Form as requested for the following graphics applied to the exterior of the vertical wall or bowl of the tank

1. The following Owner’s logo shall be placed on the outside of the tank.

2. The Contractor shall place the logo on both sides of the tank and use one color.

3. Unless instructed otherwise by the Owner, the logo height shall be approximately ninety percent (90%) of the tank's vertical face. Logo height shall be finalized

through shop drawing reviews.

4. The orientation of the logo will be such that the centerline of the new logo will match the centerline of the old. The second logo orientation will be centered 180 degrees of

the centerline of the first logo.

B. Proofs

1. The Contractor shall provide proofs of the tank graphics for review and approval by the Owner and shall allow a period of 30 days for the Owner to complete its review

process:

2. The proof shall include an overhead view drawing of the tank with dimensions of the tank, length of the logo and space between each logo with north arrow and

orientation as requested by the Owner.

3.10. CLEANING AND PROTECTION

A. At end of each workday, remove rubbish, empty cans, rags, and other discarded materials from Project site.

B. After completing paint application, clean spattered surfaces. Remove spattered paints by washing, scraping, or other methods. Do not scratch or damage adjacent finished surfaces.

C. Protect work of other trades against damage from paint application. Correct damage to work of other trades by cleaning, repairing, replacing, and refinishing, as approved by Owner

and/or Owner’s Representative, and leave in an undamaged condition. Refer to Section 01

74 19 – WASTE MANAGEMENT for more details.

D. At completion of construction activities of other trades, touch up and restore damaged or defaced painted surfaces.

3.11. DISINFECTION



A. Refer to SECTION 01 75 00 – DISINFECTION AND TESTING, for additional requirements.

B. After the tank has been painted and interior surfaces have thoroughly dried remove any visible dirt or contaminating materials.

C. Disinfect the interior of water tank, the fill pipe, and all piping structures and valves, prior to returning tanks to service.

D. The Owner will furnish the water for cleaning and initial disinfection.

E. Once disinfection is achieve and approved in accordance with SECTION 01 75 00 – DISINFECTION AND TESTING, the piping shall be flushed.

F. Dechlorination shall be required when chlorine residuals are higher than that described in SECTION 01 75 00 – DISINFECTION AND TESTING.

END OF SECTION

Structure BookmarksFigureFigureFigureFigureFigure

Revised Section 09 90 00 has been attached. The attached ... 2 - IFB SA 1821.pdf · SSPC PA 1...

Documents

Transcript of Revised Section 09 90 00 has been attached. The attached ... 2 - IFB SA 1821.pdf · SSPC PA 1...