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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
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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.
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Gainesville WST Rehabilitation PAINTING OF STEEL TANKS
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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.
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Gainesville WST Rehabilitation PAINTING OF STEEL TANKS
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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
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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.
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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.
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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.
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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.
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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.
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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)
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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.
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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.
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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.
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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.
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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:
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. 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.
4. Finish Coat: 4.0 to 6.0 mils DFT.
5. 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.
D. Exterior 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. 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.
4. Finish Coat: 2.0 to 3.0 mils DFT.
5. Total DFT of combined primer, intermediate, and finish coats
shall be in the range of 7.5 mils to 11.5, with any individual spot
measurement a minimum of 7.5 mils DFT.
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.
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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.
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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.
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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.
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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.
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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
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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