PART 1 GENERAL - D.N. Higginsdnhiggins.com/docs/FKAA Stock Island Tank Repair - Specs.pdf · 2013....

Florida Keys Aqueduct Authority

Stock Island - Tank 3

Section 01010

Summary of Work

TEAM 13-0612 TS - 1

SECTION 01010

SUMMARY OF WORK

PART 1 – GENERAL

1.01 DESCRIPTION

A. The scope of this section defines the work and materials included in each bid item in

the specifications for the repair of the Stock Island Pumping Station Tank 3 for the

Florida Keys Aqueduct Authority, Key West, Florida (hereinafter "Owner").

B. This tank is a 5-million gallon, welded, steel, flat bottom, cone roof tank. The

following information was observed:

Diameter: 140 ft.

Height: 42 ft.

Material: A36 Steel

C. The overall project consists of providing all labor, materials, supervision, power,

equipment and supplies for repairing the damaged roof and floor. The

CONTRACTOR is being presented two options for this repair and is requested to

bid on one or both:

1. OPTION 1 - Replace Damaged Steel and Entire Floor:

a) Damaged roof support members and rim angle sections will be

removed and replaced in-kind.

b) The entire floor will be cut out and replaced with a new, lap welded,

carbon steel floor.

c) Following repairs, the entire tank interior and exterior will be

abrasive blasted and recoated.

d) Install a new 24” diameter roof vent on Tanks 1, 2 and 3, including

repair of damaged exterior coatings around vent area of Tanks 1 and

2.

2. OPTION 2 - Geodesic Dome and Floor Repair:

a) Install an API-650 designed windgirder on the tank shell.

b) Remove entire existing roof, support structure, and support columns.

c) Install an aluminum geodesic dome roof.

d) Replace a 24” wide ring of floor plates around the perimeter of the

floor (annular ring), including under the tank shell.

e) Apply the specified thick film liner over the entire floor and 36” up

the tank shell interior.

f) Install a new 24” diameter roof vent on Tanks 1 and 2, including

repair of damaged exterior coatings around vent area.

1.02 RELATED DRAWINGS

A. S100 – Wind Girder Plan

B. S101 – Wind Girder Section Detail

C. S102 – Wind Girder Ladder Opening

D. S103 – Wind Girder Penetration

Section 01010

Summary of Work Florida Keys Aqueduct Authority


TEAM 13-0612 TS - 2

E. S104 – Annular Ring Detials

1.03 SITE CONDITIONS

A. Equipment and material required for daily work may be stored at the tank but cannot

unreasonably encumber the job site with material or equipment. Storage will be at

the risk of the CONTRACTOR. No responsibility will be assumed by the OWNER

or the ENGINEER for the security of stored material and equipment. All hazardous

material must be stored in locked containers.

B. Coordination of access to the tank must be arranged with the OWNER prior to

accessing the construction area.

C. All waste material, including scrap metal and spent abrasives, shall be contained

within the designated work area, and disposed of according to the submitted plan.

D. The CONTRACTOR shall take a video of the tank site prior to beginning work to

document the condition and placement of equipment and structures.

E. At the completion of this project, the areas surrounding the tank shall be restored to

a condition equal to or better than conditions prior to this project. Any grass,

shrubbery, trees, etc., damaged by CONTRACTOR personnel or equipment, or as a

result of work performed shall be replaced at the CONTRACTOR's expense. All

damaged grass shall be replaced with sod of the same type as the existing grass.

F. The CONTRACTOR shall be responsible for any damage to any surrounding

structures such as buildings, cars, landscaping, sidewalks, etc., as a result of paint

spatter, blast abrasive, mechanical damage, etc. All damage shall be repaired to the

satisfaction of the property owner making the claim at no additional cost to the

OWNER or ENGINEER.

1.04 GENERAL DESCRIPTION OF WORK TO BE PERFORMED

A. All fabrication, installation, welding, abrasive blasting, and coating or lining

application shall be done by experienced personnel. The awarded contractor shall

be able to provide proof of five successful projects as prime contractor on projects

of similar size, completed in the last five years. Similar projects shall be a minimum

of 1,000,000-gallon tank size in potable water service.

B. The CONTRACTOR shall furnish all labor, materials, equipment, tools, services

and incidentals to complete all work required by these specifications and as shown

on the drawings.

C. The CONTRACTOR shall perform the work complete, in place, and ready for

continuous service, and shall include, repairs, testing, permits, cleanup,

replacements, and restoration required as a result of damages caused during this

construction.

D. All materials, equipment, skills, tools and labor which are reasonably and properly

inferable and necessary for the proper completion of the work in a substantial

manner and in compliance with the requirements stated or implied by these

Specifications or Drawings shall be furnished and installed by the CONTRACTOR

without additional compensation, whether specifically indicated in the Contract

Documents or not.

E. The CONTRACTOR shall comply with all Municipal, County, State, Federal, and

other codes which are applicable to the proposed construction work.



Section 01010

Summary of Work

TEAM 13-0612 TS - 3

1.05 WORK SEQUENCE

A. All work to be done under these specifications shall be done with minimum

interference to the existing utility service and water systems operation and adjacent

land uses. The CONTRACTOR shall coordinate his work with the OWNER such

that the facilities are maintained to the maximum extent possible.

B. Construct work in stages to accommodate the OWNER use of the premises during

the construction period; coordinate the construction schedule and operations with

the OWNER representative.

1.06 CONSTRUCTION AREAS

A. CONTRACTOR shall limit his use of the construction areas for work and storage,

to allow for:

1. Work by other Contractors

2. OWNER use

B. Contractor shall coordinate use of work site under direction of ENGINEER.

C. CONTRACTOR shall assume full responsibility for the protection and safekeeping

of all materials and equipment under this contract, stored on site.

D. CONTRACTOR shall move and store products under CONTRACTOR‟S control,

which interfere with operations of the OWNER or separate CONTRACTORS.

E. CONTRACTOR shall obtain and pay for the use of additional storage or work areas

needed for operations.

1.07 OWNER OCCUPANCY

A. The OWNER will have full access to and use of all existing utilities during the

entire period of construction for the conduct of its normal operations.

CONTRACTOR shall cooperate with the OWNER representative in all

construction operations to minimize conflict, and facilitate OWNER usage.

B. CONTRACTOR shall at all times conduct his operations as to insure the least

inconvenience to the facility.

1.08 PLANS AND SPECIFICATIONS

A. SPECIFICATIONS

1. Each section consists of three (3) parts: PART 1, GENERAL; PART 2,

PRODUCTS; and PART 3, EXECUTION. The General part contains

general requirements, which govern the work. Products and Execution

modify and supplement these by detailed requirements of the work and shall

always govern whenever there appears to be a conflict.

1.09 INTENT

A. All work called for in the specifications applicable to this Contract, but not shown

on the Plans in their present form, or vice versa, shall be of like affect as if shown or

mentioned in both. Work not specified in either the plans or in the Specifications,

but involved in carrying out their intent or in the complete and proper execution of

the work, is required and shall be performed by the CONTRACTOR as though it

were specifically delineated or described.

B. The apparent silence of the specifications as to any detail, or the apparent omission

from them of a detailed description concerning any work to be done and materials to

Section 01010

Summary of Work Florida Keys Aqueduct Authority


TEAM 13-0612 TS - 4

be furnished, shall be regarded as meaning that only the best general practice is to

prevail and that only material and workmanship of the best quality is to be used, and

interpretation of these specifications shall be made upon that basis.

C. The inclusion of the General Requirements (or work specified elsewhere), in the

General part of the specifications is only for the convenience of the

CONTRACTOR, and shall not be interpreted as a complete list of related

specification sections.

1.10 DISCREPANCY BETWEEN DRAWINGS AND SPECIFICATIONS

A. In case of any discrepancy between the drawings and specifications, the more

stringent requirement shall apply. The CONTRACTOR will not be held responsible

for the discovery of such discrepancy, but any work done on the item involved after

such discovery, and prior to authorization by the ENGINEER, will be done at the

CONTRACTOR'S risk and expense.

PART 2 - PRODUCTS (NOT USED)

PART 3 - EXECUTION (NOT USED)

- END OF SECTION 01010 –



Section 05050

Welding

TEAM 13-0612 TS - 5

SECTION 05050 - WELDING

PART 1 - GENERAL

1.01 DESCRIPTION

A The purpose of this section is to provide guidelines for various welding procedures

required for the repair of this tank. This section is not intended to replace industry

standards.

B The requirements of this specification apply to atmospheric storage tank welding

(including welding of temporary and permanent attachments) during fabrication and

erection. This specification is applicable to water storage tanks being provided in

accordance with AWWA D100. It also covers tank repairs in accordance with API-

653.

C All welding within the scope of this specification shall be in accordance with the

requirements of API-653 and the additional requirements stated herein.

D The CONTRACTOR is responsible for all testing, as required by the referenced

standards and this specification.

1.02 QUALITY ASSURANCE

A Welding Procedures

(1) Shall be qualified in accordance with the requirements of ASME Section IX

and API-653.

B Welder Qualifications

(1) Welders and tackers shall be qualified in accordance with the requirements

of ASME Section IX,(Latest Edition).

(2) The OWNER may require re-qualification of any welder where there is a

question regarding his ability to make welds meeting the requirements of

this specification.

(3) The CONTRACTOR shall have a system in place which ensures that

welders have been properly qualified, and that their qualification has been

maintained as required in ASME Section IX. Records of welder

qualification and qualification maintenance shall be available for Review by

the OWNER at the work site.

C Destructive Testing

(1) For Impact Toughness Testing, a welding procedure qualification coupon

shall be tested. Charpy V notch impact test specimen, taken from the weld

metal, heat affected zone (HAZ), and unaffected base metal (three from each

area), shall be tested as required in ASTM A-370 and the following:

(a) The thickness of the procedure qualification coupon shall be at least

90% of the thickness of the thickest material (requiring testing) to be

used in the product.

(b) The long axis of the weld shall be parallel to the principal direction

of rolling or forging in the base material.

Section 05050

Welding Florida Keys Aqueduct Authority


TEAM 13-0612 TS - 6

(c) The long axis of all charpy specimens shall be perpendicular to the

weld axis and the principal direction of rolling or forging of the base

material.

(d) The notches, in all specimens, shall be cut such that their long axis is

approximately perpendicular to the surface of the material.

(2) Weld Metal Specimens;

(a) The center axis of the specimen shall be at least ¼”, and where

thickness permits, not less than 3/8” from the weld surface.

(b) The area of the notch and resulting fracture shall be located totally

within the deposited weld metal.

(3) HAZ Specimens;

(a) The center axis of the specimens shall be as near as practicable to a

depth midway between the surface and center thickness.

(b) Specimens shall be etched to define the HAZ before locating the

notch.

(c) The notch shall be cut in such a manner as to include as much HAZ

as possible in the resulting fracture surface.

(4) Base Metal Specimens;

(a) Shall be taken from the same depth as and shall be parallel to the

HAZ Specimens.

(b) The area of the notch and resulting fracture shall be located totally

within unaffected base metal.

(c) Sub-sized impact specimens may only be used with the approval of

the OWNER.

(d) The test temperature and acceptance criteria shall be the same as

required, by contract specification, for the base metal. The test

results for the HAZ specimens (average value as defined in ASTM

A-370) shall equal or exceed those of the base metal specimens.

(e) The welding procedure qualification coupon shall be exposed to the

same heat treatment cycles, both before and after welding, as the

product will experience.

(f) After initial testing, additional heats of filler material of the same

AWS Classification, produced by the same manufacturer, need not

be impact tested provided the minimum impact properties required

by the applicable filler material specification meet or exceed those

required by contract specification for the base material.

D Non Destructive Examination Requirements (NDE)

(1) General

(a) NDE examiners shall be qualified in accordance with the

requirements of SNT-TC-1A. Only individuals qualified for NDT

LEVEL II or III may perform and evaluate the results of

nondestructive examination.

(2) Visual Examination (VT)

(a) All welds, including temporary attachment removal sites, shall be

visually examined by a qualified examiner, other than the welder

who made the weld.



Section 05050

Welding

TEAM 13-0612 TS - 7

(b) The following discontinuities are unacceptable:

(i) Cracks.

(ii) Undercut depth exceeding 1/32" for horizontal butt joints.

Undercut depth exceeding 1/64" for vertical butt joints.

(iii) Incomplete penetration.

(iv) Lack of fusion.

(v) Excess groove weld reinforcement

(3) Magnetic Particle(MT) or Liquid Penetrant (PT) Examination

(a) Where the applicable Codes require sectional, gouging, or chipping

inspection Magnetic Particle (MT) or Liquid Penetrant (PT)

Examination of fillet welds, MT or PT (for stainless only)

examination of the root pass and final layer shall be performed in

lieu of the required inspection.

(b) The first pass of the new shell-to-bottom weld shall be PT tested

prior to additional welding on either side. All indications shall be

repaired prior to additional welding.

(4) Radiographic Examination

(a) Radiography shall be conducted in accordance with ASME, Section

V, Article 4. The CONTRACTOR shall report to the OWNER.

(5) Vacuum Box Testing

(a) All new floor seams and bottom to shell corner welds shall be

vacuum box tested.

(b) The vacuum box test shall be conducted in accordance with ASME

Section V, Article 10.

(6) Marking and Recordkeeping

(a) After completion of the work, a nameplate shall be prepared in

accordance with Section 11 of API-653. The nameplate shall be not

less than 4” H x 6” W, constructed of corrosion resistant material.

1.03 REFERENCE DOCUMENTS

A Standard (Latest Edition)

(1) ASME Boiler and Pressure Vessel Code, Section IX, Welding and Brazing

Qualifications, latest edition.

(2) ASME Boiler and Pressure Vessel Code, Section V, Non-Destructive

Examination, latest edition.

(3) ASNT Recommended Practice No. SNT-TC-1A.

(4) ASTM A-370

(5) AWWA D100 Welded Steel Tanks for Water Storage.

(6) API-653 Tank Inspection, Repair, Alteration and Reconstruction.

B In the event of a conflict between a referenced document and this document, this

document shall take precedence.

Section 05050



TEAM 13-0612 TS - 8

PART 2 - PRODUCTS

2.01 MATERIALS

A Materials are to be supplied as specified herein the enclosed drawings and

specifications.

B Welding Material Storage and Use

(1) All filler material must be kept in a clean, dry, warm area.

(2) Immediately after removal from sealed containers, carbon and low alloy

steel, low hydrogen electrodes and stainless steel electrodes shall be placed

in hot holding ovens and maintained at 250F to 300F, issued for use in

hot portable ovens maintained at the same temperature range or issued in

small quantities which will be used within the appropriate exposure limit.

(3) Where the holding oven will contain only carbon and low alloy steel

electrodes, the temperature range may be expanded to 250F to 350F.

Additional, E7024 electrodes shall be heated at 150F to 175F and E6010

electrodes shall not be heated above 100F (ambient temps).

(4) Electrodes shall not be used after they have been exposed to the atmosphere

longer than the exposure time limit shown in the following table.

Electrode Type Exposure Time Limit

Stainless steel 8 hours

E7018-X 4 hours

E8018-X 2 hours

E7024 8 hours

E6010 None

(5) If electrodes are issued in portable electrode ovens (same temperature

requirements for holding ovens), the exposure time doesn‟t start until

electrodes are removed from the portable oven.

(6) Once exposed to the atmosphere, carbon and low alloy steel low hydrogen

electrodes shall be used, within the time limit or discarded. They shall not

be returned to a portable or holding oven. Stainless electrodes and E7024

may be returned to the holding oven for a minimum of 8 hours and then re-

issued.

(7) Portable electrode ovens shall remain plugged in with the tell-tale light

energized and visible except while in transit.

(8) Welders should remove, from the portable oven, only the amount they

believe will be consumed before the next break in welding.

(9) Covered electrodes which have become wet shall be discarded.

(10) SAW flux shall be purchased in triple layer bags or better, which prevent

moisture pick-up. Once removed from the bag, SAW flux shall be used

immediately or stored in a holding oven maintained at 250F and 350F.

Opened, but only partially used bags shall be similarly stored.



Section 05050

Welding

TEAM 13-0612 TS - 9

(11) A program shall be implemented to ensure that the above requirements for

control of filler materials are observed. The program shall be described in a

written procedure which shall be available for Review by THE OWNER at

the work site.

(12) Filler material used shall be that specified in the WPS.

(13) All welding filler materials shall meet the requirements of the applicable

AWS filler material specification.

(14) Covered electrodes for SMAW welding shall not exceed 5/32” diameter for

vertical and overhead welding and 3/16” diameter for flat and horizontal

welding.

(15) Covered electrodes for carbon and alloy steel welding shall be low hydrogen

type (EXX18) and shall have been purchased in hermetically sealed metal

containers. For materials with a minimum tensile strength between 80 and

85 quips, E8018-CS covered electrodes shall be used. Non-low hydrogen,

D7024 or E6010 type, electrodes may be used for welding on carbon steel

floor and roof plates. E6010 may be used on carbon steel roof and floor

plates with thickness of 1/2” or less. This does not include any welds

involving the tank shell plates.

(16) Bare rod filler materials for GTAW shall be ID tagged to preclude loss of

identification.

(17) Filler materials shall be used in accordance with the Manufacturer‟s

Recommended Practices. For FCAW welding, the shielding gas used must

be the same as that used by the Manufacturer during product qualification

testing.

PART 3 - EXECUTION

3.01 GENERAL WELDING PROCESSES

A The Following welding processes are allowed with the noted restrictions.

Welding Processes Restrictions

GTAW (Gas Tungsten Arc) Addition of filler material required

SMAW (Shielded Metal Arc) None

FCAW (Flux Cored Arc) a) Externally shielded only75/25 A/CO2

(All positions) CO2 (Flat & Horizontal

Only)

b) Short Circuit Transfer Mode

prohibited

c) Wind protection required at site

SAW (Submerged Arc) No alloy in the flux

B Other welding processes may not be used without written approval of the OWNER.

When requesting the use of other processes, the following additional information

must be submitted:

(1) Proposed application and limitations of those applications.

(2) In-Progress Inspections to ensure that process remains under control.

Section 05050



TEAM 13-0612 TS - 10

(3) NDE required for completed welds. If less than 100% a detailed description

of the sampling plan to be employed.

(4) Any special welder qualification requirements.

(5) Historical evidence supporting quality of welds.

C Joint Design and Preparation

(1) The actual joint designs to be employed (on this contract only) shall be

detailed on the applicable OWNER approved WPS or another document

which has been submitted along with WPS.

(2) Note: Groove weld symbols, without a number representing bevel depth or

effective throat, require full penetration welds.

(3) Butt joint alignment shall not result in a centerline offset exceeding 10% of

the thickness of the thinner part or 1/16,” whichever is less, except

misalignment of the tank shell shall meet the criteria specified in API-650

Sections 5.2.3.1 and 5.2.3.2.

(4) The transition of thickness at butt joints of parts having different thickness

shall not exceed a 4 to 1 slope. The addition of weld metal beyond the edge

of the groove may be employed to achieve the slope.

(5) Parts to be joined by fillet welds, shall be brought into as close contact as

practicable. In no case shall the root opening exceed 3/16” and, where there

is any root opening, the size of the fillet shall be increased by the amount of

the opening.

(6) The gap between a backing bar and the bottom surface of the joint and the

gap between feting surfaces of a lap joint shall not exceed 1/16.”

(7) For single welded pipe or tube joints, inside diameters shall match within

1/16” and the maximum point mismatch, due to out-of-roundness, shall not

exceed 3/32.”

(8) Socket weld fit up shall meet the requirements of ANSI B31.1, Paragraph

127.3.3.

(9) Backing rings and bars, when used, shall be of a material which is

compatible with the base metal.

(10) Where a weld prep has been made with a thermal process, such as oxy-

acetylene cutting of air-arc gouging, the surface shall be ground as necessary

to remove any slag or scale and provide a relatively smooth surface on

which to weld.

(11) Prior to welding, surfaces to be welded and adjacent surfaces for at least

1/2” shall be clean and free of any scale, rust, oil, grease, paint or other

extraneous material. Tools such as, grinders and wire brushes, which have

been used on carbon steels, shall not be used on stainless steel.

D GTAW Shielding and Purge Gas

(1) For GTAW welding, the torch shield gas shall be argon. Purge Gas,

required only during deposit of the first 3/16” of weld thickness in stainless

butt joints, shall be Argon.

E Preheat and Interpass Temperatures

(1) For carbon steel, material over 1-1/2” in thickness, the minimum preheat

temperature shall be 200F. In all other cases, the minimum preheat

temperature shall be 50F.



Section 05050

Welding

TEAM 13-0612 TS - 11

(2) Minimum preheat temperatures also apply to tack welding and temporary

attachment welding.

(3) When determining required preheat temperature, the material thickness is

the thickness of the thicker member being joined.

(4) Elevated preheat (temperatures above 50F), when required in paragraph

10.1 and 10.2 above, shall be by electric resistance or induction heaters.

Exceptions to this requirement are:

(a) Manually applied flame heat may be used for welds with a throat

3/4” on P1 materials up to 2” thick. In such cases, care must be

exercised to heat the entire area uniformly, avoiding any localized

hot or cold spots.

(b) Manually applied flame heating may be used for tack welds.

(5) In lieu of using electric heaters as required above, a procedure for applying

flame heat by mechanical means, which ensures a uniform controlled heat

throughout the welding operations, may be submitted to the OWNER for

approval.

(6) Where there is a specified maximum inter-pass temperature, the joint shall

be below that temperature immediately prior to beginning any weld bead.

(7) Where there is a specified maximum inter-pass temperature, the joint shall

be below that temperature immediately prior to beginning any weld bead.

(8) Surface temperature measurements, using thermocouple, contact pyrometers

or temperature indicating crayons, shall be used to verify that the joint to be

welded and adjacent surfaces in all directions, for a distance equal to at least

the thickness of the material but not less than 3", are at or above the

specified minimum preheat temperature before and during all welding.

F Miscellaneous Welding Requirements

(1) Welding shall be performed in accordance with the specific requirements of

the applicable, OWNER approved, WPS.

(2) Tack welds shall be examined to ensure that they are defect free and

properly prepared for incorporation into the final welds.

(3) For single welded open root joints, as a minimum, the first two passes shall

be deposited using the GTAW process. The resulting deposit thickness shall

be at least 1/8".

(4) Double welded full penetration joints require back gouging of the root to

sound metal, followed by MT/PT examination, before depositing metal on

the second side unless the joint is 100% radiographed, then MT/PT testing is

optional.

(5) For SMAW welding, individual bead thickness shall not exceed 3/16".

Deposited bead width shall not exceed 6 times the electrode core wire

diameter except that, when welding the cap pass on groove welds, the

maximum deposited bead width may be increased to 8 times the electrode

core wire diameter.

(6) For FCAW welding, individual bead thickness shall not exceed 1/4", except

for groove root passes, which are not limited in thickness. The bead width

shall not exceed 1/2", except in the vertical position where the maximum

bead width is 1".

Section 05050



TEAM 13-0612 TS - 12

(7) For single wire SAW welding, individual bead thickness shall not exceed

1/4" except for groove root passes, which are not limited in thickness. The

bead width shall not exceed 5/8". In the horizontal position, only fillet

welding is permitted and the maximum single pass, horizontal fillet size is

5/16".

(8) All slag or other foreign material shall be removed prior to depositing

succeeding weld passes.

(9) After cleaning, each weld pass shall be examined to ensure that it is defect

free prior to depositing the subsequent pass.

(10) Temporary attachments may be removed by grinding or thermal methods,

however, if thermal methods are used, approximately 1/8" of material shall

be left for final removal by grinding. Temporary attachments may not be

removed by hammer blows or by bending back and forth.

(11) For vertical welding, the direction of travel shall be "up".

G Post Weld Heat Treatment (PWHT)

(1) PWHT of storage tank weld joints shall be performed when and as required

in AWWA D100.

(2) Furnace, electric resistance or induction heaters shall be used for all PWHT.

Other methods may not be used without written approval of the OWNER.

(3) A strip chart record of the thermal history is required for all PWHT.

- END OF SECTION -



Section 07710

Aluminum Geodesic Dome Roof

TEAM 13-0612 TS - 13

SECTION 07710

ALUMINUM GEODESIC DOME ROOF

PART 1 - GENERAL

1.01 DESCRIPTION

A. This section defines the design requirements for the aluminum dome structure as

described in the contract drawings and documents.

1.02 SUBMITTALS

A. Before executing any of the work in this section, prints or drawings shall be

submitted to the engineer showing dimensions, sizes, thickness, gauges, materials,

finishes, joint attachment and erection procedure.

B. A complete set of design calculations for the dome(s) shall also be submitted.

These calculations shall be signed by a Florida registered professional engineer. All

work shall be fabricated and erected in accordance with the approved drawings.

C. Certification that the specified material alloys, sizes and quantities have been

furnished shall be submitted upon completion of the project.

1.03 REFERENCES

A. The following codes and standards form a part of this section to the extent specified

herein:

1. ASTM C509 Standard Specifications for Elastomeric Cellular Preformed

Gasket and Sealing Material

2. ASTM C1115-00 Standard Specification for Dense Elastomeric Silicone Rubber

Gaskets

3. ASTM C920 Standard Specification for Elastomeric Joint Sealants

4. Aluminum Association Specifications for Aluminum Structures

5. Aluminum Association Aluminum Design Manual; Specifications and

Guidelines for Aluminum Structures

6. ASCE 8-02 Specification for the Design of Cold-Formed Stainless Steel

Structural Members

7. ASTM F593 Standard Specification for Stainless Steel Bolts, Hex Cap Screws,

and Studs

8. AASHTO Division 2 Section 25 Elastomeric Bearings

9. Federal Specification TT-S-00230C

10. Federal Specification A-A-59588

PART 2 - PRODUCTS

2.01 DESCRIPTION

A. The dome roof shall be clear-span and self-supporting from the peripheral structure

with primary horizontal forces contained by an integral aluminum tension ring

(unless otherwise specified). The frame shall consist of aluminum structural

members with the joints arrayed on the surface of a sphere. The arrangement of

Section 07710




TEAM 13-0612 TS - 14

members shall result in a pattern of triangular spaces. These spaces shall be closed

with light gauge aluminum panels. The members shall be joined by means of

bolting their flanges to aluminum gusset plates.

B. The design shall include a walkway and/or access to all vents for maintenance.

C. An exterior, hinged access hatch, minimum 30” x 30” shall be provided near the

top of the tank ladder.

D. All metal components of the aluminum dome structure shall be aluminum or 300

series stainless steel. No galvanized, aluminized, painted, or plated steel shall be

used anywhere in the dome above the mounting bracket base plates. Dissimilar

materials in the supporting structure shall be isolated from the aluminum dome by

means of a compatible elastomeric gasket.

E. The entire structure shall be designed as a watertight system under all design load

and temperature conditions.

F. The aluminum closure panels shall be attached continuously along their edges to the

structural members by means of batten bars which engage the panels in an

interlocking joint. This batten bar shall also secure an elastomeric weatherseal

gasket that shall form a continuous watertight seal along the panel edges. Designs

that incorporate overlapping panels and/or designs that incorporate fasteners which

penetrate panels and attach to structural members are expressly prohibited.

G. Connection forces shall be transferred through gusset plates connected to the top

and bottom flanges of the beam struts. The connections shall be designed as

moment connections; a minimum of four bolts shall be used to connect the gusset

plate to each strut flange.

F. The structural analysis shall be performed using stiffness analysis models. The

structural computer models shall include the effect of geometry irregularities such as

dormer openings and perimeter support members. Full provisions shall be made to

allow for thermal expansion.

G. Fasteners shall be designed with a factor of safety of 2.34 on ultimate strength and

1.65 on yield strength.

2.02 EXPERIENCE/QUALIFICATIONS

A. No equipment shall be supplied by any manufacturer not regularly engaged in the

manufacturing and production of domes in the size and character herein specified.

The manufacturer must have designed, manufactured and installed at least three (3)

domes of the same type and size as unit(s) specified herein. These domes must be in

satisfactory use for a period not less than ten (10) years.

B. The cover manufacturer must own and operate its own US-based manufacturing

facility, and the use of a fabrication facility that is not US-based and/or owned and

operated by the cover manufacturer is expressly prohibited. Manufactures that do

not meet these qualifications will not be considered.

C. The cover manufacturer must be ISO 9001 certified.

D. Contractor to submit resumes of key personnel for Owner review and approval.



Section 07710


TEAM 13-0612 TS - 15

2.03 MATERIALS

A. The following is a summary of approved materials and/or material specifications:

1. All aluminum alloys shall be as defined by the Aluminum Association and

published in the ALUMINUM STANDARDS AND DATA.

2. Bolts and Fasteners - Bolts shall be 300 series stainless steel per ASTM

F593, Alloy Group 1. Lockbolts shall be 7075-T73 aluminum or 305

stainless steel. Screws shall be aluminum or 300 series stainless steel.

3. Plates and Sheets - Plate and sheet material shall be aluminum alloy 3003-

H16, 3105-H154, 6061-T6, 5052-H32 or 5052-H36; mill finish AA - M10

as fabricated. Tension ring gussets shall be 0.375 inch minimum thickness.

Sheet materials shall be 0.05” minimum thickness.

4. Structural Shapes - Aluminum structural shapes shall be alloy 6061-T6. The

aluminum structural members shall be a minimum of 4 ½ inches deep.

5. Tension Ring - Tension ring structural shapes shall be 6061-T6 aluminum.

Design of the tension ring shall be based on the net cross section of the

members and shall not include top flange protrusions used for panel

attachment, bolt holes, or outstanding legs that are not connected through the

joints.

6. Miscellaneous Shapes - Miscellaneous aluminum shapes shall be alloy

6061-T6 or 6063-T5.

7. Gaskets - All gaskets shall be ozone resistant Silicone or Neoprene only. If

Neoprene gaskets are utilized they must be shielded from exposure to

ultraviolet light. The gaskets must have a ¼” minimum thickness.

8. Sealant - All sealants shall be silicone and resistant to ozone and ultraviolet

light and conform to Federal Specification TT-S-00230C.

9. Miscellaneous Penetration Seals- All other penetration seals shall be

weatherproof rubber seals.

10. Support Bearings - Bearings at the supports shall conform to AASHTO

Division 2, Section 25. Acceptable bearing surfaces for sliding bearing are

Teflon to stainless steel only. In order to avoid damage to the Teflon and to

reduce the coefficient of bearing friction, Teflon shall not bear on aluminum

surfaces.

2.04 DESIGN LOADS

A. The entire dome structure shall be designed to sustain the loads specified herein,

with the stress limitations of the Aluminum Association SPECIFICATIONS FOR

ALUMINUM STRUCTURES. For members subjected to axial forces and bending

moments due to load eccentricity or lateral loads, the combined member stresses

shall be determined by adding the stress component due to axial load to the stress

components due to bending in both the major and minor axis. In no case shall the

dome be designed for any loads less than those specified by the local building code

and/or local amendments.

Section 07710




TEAM 13-0612 TS - 16

B. The load cases to be considered shall be those described below unless more severe

loads are specified by the purchaser.

1. Dead Load – The dead load shall be defined as the weight of the structure

and all permanently attached to and supported by the structure.

2. Live Load – As required per ASCE 7-05 Section 4.9.1.

3. Snow Load – As required per ASCE 7-05 but not less than required by local

building codes and/or local amendments.

a) Importance Factor (I) = 1.0 or greater per ASCE 7-05 Table 1-1.

b) Exposure Factor (Ce) = 1.0 or greater per ASCE 7-05 Table 7-2.

c) Thermal Factor (Ct) = 1.2.

4. Unbalanced Snow Load – As required per ASCE 7-05 Section 7.6.4 and

Figure 7-3 but not less than required by local building codes and/or

amendments.

5. Wind Load – As required per ASCE 7-05 Figure 6-7 but not less than

required by local building codes and/or amendments.

a) Importance Factor (I) = 1.0 or greater per ASCE 7-05 Table 6-1.

b) Exposure Factor = C minimum or D where required.

c) Internal wind pressure coefficient shall not be less than 0.

6. Load Combinations – As required per ASCE 7-05 Section 2.4.1.

7. Temperature - The load combinations listed above shall be considered for a

temperature change of 100 degrees F below the installation temperature and

100 degrees F above the installation temperature and for a material

temperature range of 40 degrees F below 0 to 160 degrees F above zero.

8. Panel Design Load - In addition to the above mentioned loads and load

combinations, the aluminum panels shall be designed for a 250 pound load

distributed over one square foot at any location and a plus or minus 60 psf

load distributed over the entire area of any given panel. These loads are to

be taken as acting separately from one another and not simultaneously with

other design loads.

C. Snap-Through Buckling (General Shell Buckling) shall be determined in accordance

with the following formula:

Where:

w = Allowable load [pressure psf].

Ix = Moment of inertia of strut about the strong axis [in4].

A = Cross sectional area of strut [in2].

R = Spherical radius of dome [in].

L = Average member length [in].

SF = Safety factor (1.65).

1. The allowable buckling pressure shall be compared to the maximum

intensities of symmetrical and nonsymmetrical load conditions.

w =2258x10 I A

(SF) R L

6x

2



Section 07710


TEAM 13-0612 TS - 17

2. In lieu of the above formula, non-linear analysis modeling may also be

performed to verify that the stiffness is adequate to prevent snap-through

buckling for all load cases include live, snow and wind loads. To account for

modeling variations and/or user assumptions in the analysis, a minimum

safety factor of 1.95 shall be used.

2.05 MANUFACTURERS

A. The aluminum dome cover shall be as manufactured by CST Covers - Gardena,

California (310) 353-5100 or Conroe, Texas (936) 539-1747.

PART 3 - EXECUTION

3.01 INSTALLATION

A. The dome shall be installed by the manufacturer‟s installation crews.

B. All work shall be executed by skilled mechanics with a supervisor experienced in

the erection of domes. The dome shall be erected plumb and level and in proper

alignment.

C. Due to space constraints, the dome must be assembled on the tank. No lay down

area is available.

D. Field re-fabrication of structural components or panels will not be accepted. Forcing

of the structure to achieve fit-up during construction is expressly forbidden and not

acceptable.

E. All sealant joints shall be tooled slightly concave after sealant is installed. Care

shall be taken to keep sealant confined to joint area, and any outside of the joint

shall be removed so that the panels will be free from misplaced sealant. All gasket

materials shall be continuous; splices will not be allowed. All sealants shall be

placed only in a manner as recommended by the sealant manufacturer.

3.02 WARRANTY

A. The dome manufacturer shall warrant that the work described herein shall be free

from defects, workmanship and material. The dome manufacturer shall replace or

repair only faulty workmanship or defective material furnished by it that is reported

to it within one (1) year from the date of completion of this scope of work.

B. The dome manufacturer shall warrant that the work described herein shall be leak

tight for a minimum of five years from the date of approved installation completion.

END OF SECTION 07710

Section 09900

Painting Florida Keys Aqueduct Authority


TEAM 13-0612 TS - 18

SECTION - 09900

PAINTING

PART 1 - GENERAL

1.01 DESCRIPTION

A. This section pertains to the interior and exterior painting of Tank 3, including the

thick-film liner specified in Option 2 (See Section 01010).

B. All surfaces encompassed by this specification shall be cleaned, prepared and coated

with the designated paint system as specified herein. All coating shall be applied in

strict accordance with the manufacturer's instructions.

1.02 RELATED SECTIONS

A. 01010 Summary of Work

1.03 REFERENCED STANDARDS

A. SSPC Society for Protective Coatings

1.04 QUALITY ASSURANCE

A. INSPECTION PROGRAM

1. Throughout the duration of the work, a formalized inspection program will be

developed and maintained by the OWNER/ENGINEER. The CONTRACTOR

will be familiarized with the inspection program and the Project line of authority

at the Pre-Construction Conference.

2. It shall be the CONTRACTOR'S responsibility to provide the OWNER, through

the ENGINEER, with clear, accurate information necessary for the required

inspection reports.

3. The CONTRACTOR shall fill out a daily inspection report form. This form

will be furnished by the ENGINEER. No request for payment will be processed

unless accompanied by completed inspection report forms. Inspections will be

performed by the ENGINEER or his designee. It is expected that information

furnished on the CONTRACTOR‟S inspection reports shall coincide with the

information recorded during the ENGINEER'S inspections.

4. The CONTRACTOR shall notify the INSPECTOR when an area is ready for

inspection. No work will be approved until the INSPECTOR has performed all

required tests and inspections.

5. The CONTRACTOR shall provide for the INSPECTOR all necessary rigging

required to complete the inspection and testing operations. The CONTRACTOR

shall assist the INSPECTOR in making all required tests and inspections.

Deficient areas such as pinholes, holidays, embedded contamination, sags, dry

spray, mechanical damage, high / low mils, shall be repaired to meet the

requirements of this specification.

6. The OWNER will provide part-time coating inspection for the duration of the

project. The INSPECTOR shall be on site at critical points in the operation

including holiday tests and touch-up work.



Section 09900

Painting

TEAM 13-0612 TS - 19

B. INSPECTION AUTHORITY

1. The OWNER has ultimate responsibility for Contract administration and

inspection for this project. Field inspection responsibilities will be assigned to

the INSPECTOR.

2. The INSPECTOR can stop the job if the CONTRACTOR is deviating from the

specifications. The CONTRACTOR'S field supervisor shall be advised verbally

to stop work. Work can resume after the deviation is corrected to the

satisfaction of the OWNER and INSPECTOR.

3. Each step of the construction is subject to approval by the INSPECTOR prior to

proceeding with a subsequent step.

4. During the progress of the work and up to the date of final acceptance, the

CONTRACTOR shall at all times afford representatives of the OWNER,

County, State, and Federal agencies having jurisdiction, every reasonable, safe,

and proper access for observation of the work done or being done at the site and

also at the place of manufacture or preparation.

C. TEST EQUIPMENT FURNISHED BY CONTRACTOR

1. The CONTRACTOR shall have the following test equipment available for use

by the INSPECTOR at the job site at all times during the progress of the work:

a) Sling Psychrometer

b) Surface Temperature Gauge

c) Wet Film Thickness Gauge

d) Dry Film Thickness Gauge (Properly Calibrated)

e) National Bureau of Standards thickness plates.

f) SSPC VIS-1- Pictorial Surface Preparation Standard

g) Holiday Detector. Low voltage type such as Tinker & Rasor Model M-1,

Series 9533

h) Keane-Tator Surface Comparator Number 372 or equal

D. CONTRACTOR FURNISHED INFORMATION

1. The following information will be part of the information required for the

inspection reports:

a) Compressor: Size, Manufacturer, Moisture and Water separators, Air Drier,

Cleanliness of Air, Number of Blast Nozzles.

b) Safety Equipment: Protective Cloths, Respirators, and Breathing Equipment.

c) Paint Equipment: Paint Pump, Spray Gun, and other essential items deemed

necessary.

d) Materials: Abrasive: (Size, Type, Source, Cleanliness)

e) Paints: Type, Manufacturer, Batch No., other information deemed necessary.

f) Thinners: Type, Manufacturer, Batch No., and other information deemed

necessary.

g) Inhibitors: Type, Manufacturer, Batch No., and other information deemed

necessary.

h) Grouts: Type, Manufacturer, and other information deemed necessary.

i) Contractor Personnel: Name, Address, and Phone Number of Supervisor.

Name, Address, and Phone Number of Foreman. Name of each

Crewmember or Laborer.

j) Caulking: Type, Manufacturer, and other information deemed necessary.

Section 09900



TEAM 13-0612 TS - 20

E. CONTRACTOR REQUEST FOR INSPECTION

1. The CONTRACTOR shall notify the INSPECTOR 24 hours in advance that

portions of the work are ready for inspection and will assist the INSPECTOR in

making all necessary tests and inspections.

2. No rigging and/or staging shall be removed before required inspection and

approval is made. The CONTRACTOR shall assist the INSPECTOR in the use

and operation of all equipment for access to the surfaces to be tested.

3. The CONTRACTOR shall make all necessary rigging available to the

INSPECTOR, and assist in the operation of rigging during any and all testing

operations.

4. Approval by the INSPECTOR of an area does not release the CONTRACTOR

from providing the quality and workmanship provided by this Specification.

F. COATING THICKNESS AND CONTINUITY:

1. The specified coverage rates of the coatings are minimums. The first coat on

metal surfaces refers to the first paint coat and not to conditioning or other

pretreatment applications. Coating shall be applied to the thickness specified,

and in accordance with these specifications. The minimum dry film thickness at

any spot measurement shall not be less than 80% of the specified thickness.

Unless otherwise specified, not less than two (2) coats shall be applied. The

CONTRACTOR shall furnish a wet film thickness gauge, a dry film thickness

gauge, and certified thickness calibration standards for the INSPECTOR use.

Dry film thickness gauges shall be Mikrotest III, Elcometer Inspector III,

Positest, or Positector.

2. After each coat has been allowed to dry, the dry film thickness will be measured

by the INSPECTOR. The CONTRACTOR shall not apply a successive coat

until the dry film thickness of the preceding coat or coats has been approved by

the INSPECTOR.

3. Coating system thickness is the total thickness of all the required coats of paint,

and does not include passivators or sealers.

4. Measurement of dry paint thickness over steel surfaces will be done in

accordance with SSPC-PA 2.

1.05 PRODUCT HANDLING

A. STORAGE

1. All coating materials shall be protected from direct sunlight and stored in a

separate structure provided by the CONTRACTOR. The structure shall be

constructed of non-combustible materials. It shall have sufficient ventilation to

prevent the concentration of fumes and vapors.

2. Coating storage environmental conditions shall conform to the coating

manufacturer's recommendations. The CONTRACTOR shall be solely

responsible for the protection of all the material stored by him at the job site.

3. Coating materials shall be delivered to the job site in the original and unopened

containers, with legible labels, marked with the proper designation of the

product, as well as the manufacturer.

4. All coating materials at the job site shall be subject to inspection.

5. An approved environmental paint spill kit and container shall be located near the

paint storage area.



Section 09900

Painting

TEAM 13-0612 TS - 21

6. All coating components will be delivered in unopened containers. They will be

protected from freezing and over heating during shipment.

7. All coating components must be stored at temperatures above freezing and out

of the weather. The containers must remain unopened until they are ready to be

used.

B. MIXING

1. Mechanical mixers or shakers shall be used to mix the coating after properly

measuring the required components. Catalysts, thinners, and other components

shall only be added in exact quantities and at the times specified by the coating

manufacturer. Containers used for mixing shall be clean and dry. Mixed

materials that are not used prior to expiration of the pot life shall be discarded.

2. All coatings materials shall be mixed and thinned in the presence of the

INSPECTOR. Plural component materials will not be approved for application

unless the INSPECTOR can verify the proper proportions were mixed, and they

had proper Induction time after mixing.

3. An approved environmental paint spill kit and container shall be located near the

paint mixing area.

4. An appropriate type of fire extinguisher shall be kept nearby.

1.06 SUBMITTALS

A. The following information shall be provided in accordance with these

specifications. Information on each coating system shall be delivered to the

ENGINEER two (2) weeks before applying that coating system. A list of materials

proposed to be used under this section shall be provided within ten (10) days of the

Notice to Proceed.

B. For each primer, intermediate, and finish coating the CONTRACTOR shall provide

the Manufacturer's Application Instructions and the data listed below:

1. Surface preparation recommendations.

2. Primer, intermediate, and finish coating, pot life and specific mixing

instructions.

3. Induction time after mixing.

4. Minimum and maximum dry and wet film thickness per coat.

5. Minimum and maximum curing time between coats including atmospheric

conditions for each.

6. Curing time before submergence in liquid.

7. Thinner and thinning ratios to be used with each paint.

8. Ventilation requirements.

9. Allowable atmospheric conditions during which the paint may be applied,

including ambient temperature, relative humidity and surface temperature.

10. Allowable applications methods.

11. Maximum allowable moisture content of surface to be painted.

12. Maximum storage life.

13. Manufacturer's certification that painting materials are in accordance with the

appropriate reference standards.

14. Material Safety Data Sheets and cautions concerning health hazards.

1.07 COLOR SELECTION

Section 09900



TEAM 13-0612 TS - 22

A. All colors are as specified by the OWNER‟s color schedule after submittal of the

manufacturers color charts.

B. The CONTRACTOR shall submit a color chart, from the specified coating

manufacturer, to the OWNER to select a color for the exterior tank and logo. The

OWNER shall submit their choice to the CONTRACTOR in writing before

application of coatings.

1.08 DAMAGE CLAIMS

A. The CONTRACTOR shall be responsible for all damages that may be

caused by this painting operation to surrounding property.

PART 2 - PRODUCTS

2.01 MATERIALS

A. The products referenced in this section are presented as a standard of comparison.

Products manufactured by other manufacturers may be substituted upon request.

Requests for substitution shall be in accordance with PART 1.06 above. Only

products of one manufacturer shall be used in a particular coating system.

B. Materials, supplies and articles provided shall be the standard products of

manufacturers. Paints in a particular coating system shall be the products of a single

manufacturer unless otherwise specified.

C. No lead containing coatings shall be used.

2.02 COATING MATERIALS

A. Each of the following manufacturers is capable of supplying the industrial coating

thin film materials specified in this specification. Where manufacturers and paint

numbers are listed, it is to show the type and quality of coatings that are required.

Proposed substitute materials for the paint numbers shown must be proven to satisfy

the material descriptions and to equal or exceed the properties of the listed

materials.

1. Tnemec Co., Inc.

2. Induron Protective Coatings, Inc.

B. The thick film liner in Option 2 shall be provided by Industrial Maintenance Group,

Plant City, Florida. No substitutions will be permitted.

C. Standard products of manufacturers other than those specified in 2.02.A will be

accepted when it is demonstrated to the Engineer that they are equal in composition,

durability, usefulness and convenience for the purpose intended. The written

acceptance by the OWNER shall be obtained before any such alternate products are

ordered by the CONTRACTOR. Request for substitution will be considered

provided the following minimum conditions are met:

1. The proposed coating system shall use an equal or greater number of separate

coats to achieve the required dry film thickness.

2. The proposed coating system shall use coatings of the same generic type.

3. Request for substitution shall have the directions for application and description

literature, which includes generic type, nonvolatile content by volume, and

information confirming that the substitution is equal to the specified coating

system.



Section 09900

Painting

TEAM 13-0612 TS - 23

4. The contractor shall provide certified laboratory data sheets showing the results

of complete spectrographic and durability tests performed on the proposed

substitute. A laboratory which conforms to the provisions of ASTM E329 and

which is a member of the American council of Independent Laboratories shall

perform tests. Costs incurred in the testing program shall be borne by the

contractor.

D. No extra contract time for tank out of service will be granted for evaluation of

substitute materials.

PART 3 - EXECUTION

3.02 GENERAL

A. All work shall be accomplished by skilled workmen in a professional manner.

B. All abrasive blasting, coating or lining application shall be done by experienced

personnel. The awarded CONTRACTOR shall be able to provide proof of five

successful projects as prime contractor on projects of similar size, completed in the

last five years.

C. All work shall comply with Local, County, State, and Federal regulations

concerning abrasive blasting and pollution control.

D. All rigging shall meet OSHA requirements, and shall be operated in a safe manner,

and will conform to industry standards. All rods and other tank appurtenances that

are used for rigging purposes shall be carefully checked for structural integrity

before use in climbing or rigging. Deficiencies shall be reported and corrected

before use.

E. The CONTRACTOR shall test all coating to be removed to assure that the coating

will meet environmental requirements for removal and disposal.

F. Prior to abrasive blasting, the CONTRACTOR shall demonstrate that the fill and

drain piping is plugged sufficiently as to not fill or clog the piping with abrasives.

G. The close proximity of OWNER property shall require containment of blast

abrasives, paint over-spray, and spatter.

H. All waste material, including spent abrasives and chemicals, shall be disposed of in

accordance with the CONTRACTOR submitted Waste Disposal Plan.

I. Surfaces to be coated shall be cleaned in accordance with SSPC-SP1 (Solvent

Cleaning). Before applying coating or surface treatments, oil, grease, dirt, rust,

loose mill scale, old weathering coatings, and other foreign substances shall be

removed, except as specified. Oil and grease shall be removed before mechanical

cleaning is started. Where mechanical cleaning is accomplished by blast cleaning,

the abrasive used shall be washed, graded and free of contaminants, which might

interfere with the adhesion and performance of the coatings. Blast abrasive shall be

"Black Beauty" or approved equal, capable of achieving a surface profile of 1 to 3

mils (unless otherwise recommended by the paint manufacturer). The

CONTRACTOR shall furnish for the INSPECTOR's use, a Keane-Tator Surface

Comparator Number 372 or equal.

J. Clean cloths and clean fluids shall be used in solvent cleaning. Cleaning and

painting shall be scheduled so that dust and spray from the cleaning process does not

fall on wet, newly painted surfaces.

Section 09900



TEAM 13-0612 TS - 24

K. Preparation of metallic surfaces shall be based upon comparison with SSPC-VIS 1

(ASTM D2200), and as described herein. The CONTRACTOR shall furnish the

photographic standards. To facilitate inspection, the CONTRACTOR shall, on the

first day of abrasive blasting operations, abrasive blast metal panels to the standards

specified. Plates shall measure a minimum of 8.5 inches by 11 inches. Panels

meeting the requirements of the Specifications shall be initialed by the

CONTRACTOR and OWNERS Representative and coated with a clear

non-yellowing finish. One of these panels shall be prepared for each type of

abrasive blasting and shall be used as a comparison standard throughout the project.

L. Compressed air for blast cleaning shall be clean, dry, and oil free as confirmed by a

blotter test each day prior to beginning blasting. Test air quality by directing the air

stream from the blast nozzle without abrasive onto a clean piece of blotter paper for

1 minute. Inspect the blotter for contamination.

M. All abrasive and dust from the blasting operation shall be removed from the surfaces

before the painting application has begun.

N. Abrasive blasted surfaces shall be coated the same day that blasting was done, and

before any rust bloom occurs.

O. All painting equipment shall be maintained in good working order and shall be

comparable to that described in the coating manufacturer's most recent application

instructions. It shall be thoroughly cleaned and inspected daily.

P. Worn nozzles, tips, etc., shall be replaced regularly. Effective oil and water

separators shall be used and serviced on all air lines.

3.03 SAFETY

A. The CONTRACTOR shall be responsible for fall protection and confined space

entry on this project.

B. All applicable OSHA requirements shall be followed.

C. All personnel entering the tank shall be certified for confined space entry.

3.04 PROTECTION OF AREAS NOT TO BE COATED

A. All areas that are not specified to be coated or repaired shall be adequately protected

to avoid any damage or overspray during all repairs, washing, blasting, and painting

operations. The CONTRACTOR shall confer with the OWNER before conducting

any work, to clarify these areas.

B. The areas NOT to be coated include:

1. All conduit and instrumentation.

2. All stainless steel and any unpainted piping.

3. Concrete foundation and containment area.

C. Tank surfaces under items that are not to be coated shall be coated. Items not to be

coated shall be temporarily relocated while the area is coated. After coating has

cured, the relocated equipment shall be returned to its original location.

D. Any damage shall be repaired at the CONTRACTOR's expense.

3.05 APPLICATION

A. Unless otherwise specified, the application of paint shall be in accordance with

SSPC-PA-1 latest edition and the paint manufacturer's printed instructions for



Section 09900

Painting

TEAM 13-0612 TS - 25

surface preparation, mixing, thinning, and paint application unless otherwise

specified herein. The CONTRACTOR shall fully comply with all recommendations

and instructions set forth by the paint manufacturer. All coatings shall be applied

before the shelf life of the coating expires.

B. Paint shall only be applied over thoroughly dry surfaces, with a surface temperature

that conforms to the manufactures minimum - maximum limits, and the relative

humidity shall not exceed 85%. The surface temperature must be at least 5 degrees

above the dew point. Paint shall not be applied to a condensing surface. Paint shall

not be applied when freshly painted surfaces may be damaged by rain, fog, dust or

condensation and/or when it can be anticipated that these conditions will prevail

during the drying period.

C. Except where otherwise specified, thinning shall only be done when necessary for

the workability of the coating material and then only in accordance with the coating

manufacturer‟s most recent printed application instructions. Use only approved

manufacturer's thinner. Thinner shall only be added in the exact quantities as

recommended by the manufacturer.

D. Paint shall be applied in a uniform layer, with a 50% over-lap pattern. All runs and

sags shall be brushed out immediately or the paint will be removed and surface

recoated.

E. All fasteners, welded seams, edges, holes, etc. shall have special care taken in

applying the prime and topcoat. These areas shall be brush coated before applying

the coating to remaining surfaces. This is to insure proper dry film thickness on

these areas.

F. Areas inaccessible to spray shall be brushed. If inaccessible by brush, daubs or

sheepskins may be used if approved by the manufacturer. Top quality, properly

styled brushes and rollers shall be used. The brushing or rolling shall be done so

that a smooth coat as nearly uniform in thickness as possible is obtained. Brush or

roller strokes shall be made to smooth the film without leaving deep or detrimental

marks.

G. Drying time between coats shall adhere to the coating manufacturer's

recommendation with conditions of temperature and humidity taken into account.

All paint and coating materials shall be stored prior to application under cover and

at temperature within 10 degrees F. of the anticipated application temperature.

H. The dry film thickness of each coat and the entire system shall follow the coating

manufacturer's recommendations and this specification. The number of coats

specified shall be a minimum to achieve the specified film thickness.

I. All paint damaged areas, which shall be touch-up painted, shall be feathered after

surface preparation to provide a smooth, even surface before priming. Touch-up

systems will be the same as the original specification. Manufacturer's complete

touch-up recommendations shall be followed.

3.06 VENTILATION

A. The CONTRACTOR shall provide forced air ventilation while work is being done

inside the tank, after each coat is applied and continue after completion of painting

for a minimum period of seven days to insure proper cure of the coating. Air shall

be exhausted from the lowest portions of the tank with the top openings kept open

and clear. Ventilation requirements will be in strict accordance with the

Section 09900



TEAM 13-0612 TS - 26

manufacturer's recommendations, this Specification and all OSHA requirements as

applicable.

3.07 SURFACE PREPARATION

A. EXTERIOR

1. The CONTRACTOR shall remove all chalk, loose paint, deposits, or other

surface contamination by High Pressure Water Wash (min. 4000 psi) of the

entire exterior immediately prior to any additional cleaning or coating

application.

2. All new steel and all rusted and abraded spots shall be abrasive blast cleaned in

accordance with SSPC-SP6 “Commercial Blast”.

3. NEW ROOF VENTS – The new vents shall be abrasive blasted and primed, in

accordance with the “Exterior” portions of this specification, prior to

installation. All coatings damaged from the installation of the new roof vents

shall be power tool cleaned in accordance with SSPC-SP11 “Power Tool Clean

to Bare Metal”.

4. The CONTRACTOR shall take every precaution necessary to contain dust from

the abrasive blasting operation blowing towards the surrounding buildings and

passing traffic.

B. INTERIOR

1. The CONTRACTOR shall remove all dirt, loose paint, deposits, oils, grease, or

other surface contamination by High Pressure Water Wash (min. 4000 psi) of

the entire interior immediately prior to any additional cleaning or coating

application.

2. The entire interior shall be abrasive blast cleaned in accordance with SSPC-

SP10 “Near White Metal” immediately prior to coating application.

3.08 COATING SYSTEMS

A. INTERIOR – THIN FILM COATING

1. All interior coatings, caulking materials, and linings of potable water tank shall

be approved for application in accordance with NSF-61 for use in potable water

systems.

2. All interior surfaces shall be cleaned as applicable in Section 3.06.B

„SURFACE PREPARATION, INTERIOR‟.

3. Each coat shall be of a contrasting color to facilitate application and inspection.

4. Interior Coating System:

a) PRE-COAT: Apply by brush, one (1) coat of the specified first coat to all

weld seams, roof lap joints, structural members, manholes, edges, lugs and

brackets. Drying time at this point is not critical and application of first coat

may proceed as soon as brushed areas are coated.

b) PRIME COAT: Apply by brush, roller, or spray to all bare metal, prepared

interior surfaces, Tnemec Company's Series N140 PotaPox Plus at a dry film

thickness of 3 mils to 5 mils.

c) TOP COAT: Apply by brush to all interior surfaces, Tnemec Company

Series N140 PotaPox Plus at a dry film thickness of 3 mils to 5 mils.



Section 09900

Painting

TEAM 13-0612 TS - 27

d) COVERAGE RATES: Maximum coverage rates shall not exceed

manufacturer's recommendations per coat. The total dry film thickness of the

interior system shall be no less than 6.0 mils at any location.

e) CAULKING: After the finish coat has cured per the manufacturer's

recommendations, all of the roof lap joints, angles, and brackets that cannot

be removed and other areas as indicated by the inspector shall be caulked

using a one component polyurethane sealant as manufactured by Sika

Corporation, Sika-flex 1a. The sealant shall be applied per the

manufacturer's data sheets.

B. EXTERIOR

1. The CONTRACTOR shall submit coating manufacturer's color charts to the

ENGINEER within ten (10) days after Contract Award. Finish colors will be

selected by the OWNER.

2. Each coat shall be of a contrasting color to facilitate application and inspection.

3. A one-gallon kit of the finish coat of paint shall be supplied to the OWNER as

touch-up paint. This kit shall be "fresh" at the time of final acceptance of the

tank. The touch-up kit shall have a minimum shelf life of one (1) year.

4. The CONTRACTOR shall be responsible for all damages that may be caused by

this painting operation to surrounding property and to vehicles traveling on and

parked on adjacent properties and roadways.

5. The CONTRACTOR shall clean all exterior surfaces as applicable in Section

3.07.A „SURFACE PREPARATION, EXTERIOR‟.

6. The CONTRACTOR shall apply the following Exterior Coating System,

including the entire exterior of Tank 3 and the roof vent areas of Tanks 1 and 2:

a) PRIME COAT: Apply by brush, roller, or spray, to all bare metal surfaces

Tnemec Company's Series 135 Chembuild at a dry film thickness of 3.0 mils

to 5.0 mils.

b) INTERMEDIATE COAT: Apply by brush or roller, to all exterior surfaces

Tnemec Company's Series 1028 Enduratone at a dry film thickness of 2.0

mils to 3.0 mils.

c) TOP COAT: Apply by brush or roller to all exterior surfaces, one coat of

Tnemec Company's Series 1028 Enduratone at a dry film thickness of 2.0

mils to 3.0 mils.

7. COVERAGE RATES: Maximum coverage rates shall not exceed

manufacturer's recommendations per coat. The total dry film thickness of the

exterior system shall be no less than 7.0 mils.

8. The CONTRACTOR shall take every precaution necessary to avoid paint

splatter blowing toward the street or any surrounding structures, including the

parking area and buildings. This also includes vehicles driving near the tank.

C. INTERIOR – THICK FILM LINER – OPTION 2

1. The CONTRACTOR shall prepare all interior surfaces as applicable in Section

3.06.B „SURFACE PREPARATION, INTERIOR‟.

2. The CONTRACTOR shall apply the following liner to the floor and 36” up the

tank shell:

Section 09900



TEAM 13-0612 TS - 28

a) Geotextile: Cut and fit one layer of geotextile specified in Section

13200.2.01.F to the entire tank floor only. Geotextile does not extend up the

tank shell.

3. Apply one application of IMG Watersafe-UB™ at 100-120 mils DFT over

the entire floor and 36” up the tank shell.

- END OF SECTION 09900 –



Section 13200

Repairs and Renovations

TEAM 13-0612 TS - 29

SECTION 13200

REPAIRS & RENOVATIONS

PART 1 - GENERAL

1.08 DESCRIPTION

A. A specific description of all repairs and renovations to be performed are as listed

herein.

B. Two options are presented for performing this project. Both options, and the parts

thereof, are detailed in this section.

1.09 RELATED SECTIONS

A. 01010 Scope of Work

B. 05050 Welding

C. 07710 Aluminum Geodesic Dome Roof

D. 09900 Painting

1.10 REFERENCED STANDARDS

A. API American Petroleum Institute

B. AWWA American Water Works Assocation

C. AWS D1.1 American Welding Society

D. SSPC Society for Protective Coatings

E. NACE National Association of Corrosion Engineers

1.11 SUBMITTALS – The CONTRACTOR shall include in the submittals the following:

A. Structural: Submit detailed fabrication and erection drawings. Indicate all

dimensions, method of assembly, connections and bill of materials.

B. Should more than one submittal be required, later submittals should clearly identify

all changes.

C. Indicate all shop and erection dimensions and details, including cuts, copes,

connections, holes, threaded fasteners and welds.

D. Indicate all shop and field welds by AWS A2.0 "Welding Symbols".

E. Revise original approved shop and erection drawings to correspond with changes

made in the field.

F. Submit Product data, (manufacturer's literature), Specifications and installation

instructions for manufactured items.

G. Upon completion of all work, “as built” drawings shall be submitted. These

drawings shall be marked up to show all changes or modifications made that deviate

from the approved submittal drawings. Final payment will not be processed until the

“as built” drawings are submitted.

Section 13200

Repairs & Renovations



TEAM 13-0612 TS - 30

1.12 TANK REPAIR REQUIREMENTS

A. OPTION 1 – Steel Replacement

1. Roof Structure: Remove the damaged structural roof members as described below.

Replace damaged roof support structure including columns, rafters, bracing, etc, as

needed to restore the structural integrity of the roof. All new structural shapes and

bolts shall be the same material, size, and dimensions as the original tank design.

All joints and connections shall use the same design as the original tank design

(bolted, welded, etc.). All welding shall be performed in accordance with API-653

Standards.

The basis of the Bid for this Option is to replace, at a minimum, the following:

a) 12” I-Beam – Qty 20

b) Vertical Column – Qty 2

c) 2” x 2” x 3/8” – As needed

Photo of Roof Structure

2. Rim Angle: Damaged sections of the rim angle shall be cut out and replaced. New

angle shall be the same material and size as the original tank design. All new angle

sections shall be rolled to a 70‟-0” radius prior to installation. Joints between new

12” I-Beam

Vertical Column



Section 13200


TEAM 13-0612 TS - 31

and existing angle sections shall be full penetration butt welds only. Testing of

welds shall be in accordance with Section 05050.

3. Roof Plates: All damaged roof plates shall be straightened or replaced as necessary

to restore a water tight seal and to properly install new structural members. New

roof plates shall be A36 steel, 3/16” nominal thickness. Any weld between the roof

plates and the rim angle shall be 3/16” fillet weld and serve as a “frangible joint” as

specified in API-650.

4. Roof Vent – Tanks 1, 2, and 3: Install a new 24” diameter tank mounting flange and

new mushroom-style vent assembly. The new vent/screen assembly shall have a

capacity to pass air so that at the maximum possible rate of water, either entering or

leaving the tank, excessive pressure will not be developed. The vent screen shall be

designed and so constructed as to prevent the entrance of birds, insects or animals

and ensure fail-safe operation in the event that the insect screens frost over or

become blocked. Vent design shall be in accordance with AWWA D100. The neck

and mounting flange shall be welded carbon steel with a bolted flange to attach the

vent. The vent body and hood shall be constructed of aluminum and shall be bolted

to the mounting flange. The screen shall be non-corrosive material.

5. Floor Replacement: The entire floor of this tank shall be replaced in accordance

with API-653 Standards. The tank shell shall be cut ½” above the existing shell-to-

bottom weld to remove the old floor. The new floor shall be A36 steel, lap welded.

The floor plates attached to the shell (“sketch plates”) shall be 5/16” thick. The

remainder of the floor shall be ¼” thick. Testing of welds shall be in accordance

with Section 05050.

6. Foundation: After removing the old floor and prior to installation of the new floor,

remove the top 6” of existing soil and replace it with 6” of clean, dry sand with

50,000 ohm/cm resistivity. The new sand shall be compacted and leveled.

7. Coatings: After all repairs are complete, abrasive blast the entire interior and apply

the “Thin Film” coating system specified in Section 09900. The exteriors of all

three tanks shall be prepared and coated in accordance with Section 09900.

B. OPTION 2 – Geodesic Dome Roof

1. Windgirder: Install a new steel windgirder as shown on drawings S100 through

S103.

2. Geodesic Dome Roof: Install a new geodesic dome roof as specified in Section

07710 of this specification

3. Floor Section Replacement: A 24” wide, perimeter section of this floor shall be

replaced with a new “annular ring”. The annular ring shall be A36 steel, 5/16”

thick. Joints between ring sections shall be full penetration butt welds using back-

up bars. The existing floor plates shall be lap-welded on top of the new annular

ring.

4. Floor Patch Plates: All through holes in the floor shall be covered with a ¼”-thick,

lap welded patch plate in accordance with API-653 standards.

5. Soil Replacement: As the existing floor plates are removed, all discovered voids in

the soil under the tank floor shall be filled with clean, dry, structural sand having a

minimum resistivity of 50,000 ohm/cm.

Section 13200

Repairs & Renovations



TEAM 13-0612 TS - 32

6. Thick-Film Liner: After all repairs are complete on the floor and the entire floor and

shell are abrasive blast cleaned, cover the entire floor with geotextile specified in

Section 13200.2.01.F and apply 100-120 mils of IMG Watersafe-UB™ over the

entire floor and 36” up the tank shell.

7. Coatings: The remainder of the interior shall be prepared and coated in accordance

with the “Thin Film” coating system specified in Section 09900. The tank exterior

shall be prepared and coated in accordance with Section 09900.

8. Roof Vent – Tank 1 and 2: Install a new 24” diameter tank mounting flange and

new mushroom-style vent assembly. The new vent/screen assembly shall have a

capacity to pass air so that at the maximum possible rate of water, either entering or

leaving the tank, excessive pressure will not be developed. The vent screen shall be

designed and so constructed as to prevent the entrance of birds, insects or animals

and ensure fail-safe operation in the event that the insect screens frost over or

become blocked. Vent design shall be in accordance with AWWA D100. The neck

and mounting flange shall be welded carbon steel with a bolted flange to attach the

vent. The vent body and hood shall be constructed of aluminum and shall be bolted

to the mounting flange. The screen shall be non-corrosive material.

1.13 QUALITY ASSURANCE – The CONTRACTOR shall use the following standards for

construction and personnel:

A. Design Criteria: API-653 (current edition)

B. Qualifications of Suppliers and Personnel:

1. Steel Fabricator: Not less than 5 years continuous experience in the fabrication

of structural steel.

2. Steel Erector: Not less than 5 years continuous experience in the erection of

tanks or similar structures.

3. Welding: All welding shall be performed by welders who are currently qualified

by tests as prescribed in AWS D1.1 "Qualification Procedure".

4. A current and accurate Weld Procedure Specification (WPS) and Procedure

Qualification Report (PQR) shall be submitted to the Owner for approval for all

welds performed on this tank.

5. Use experienced riggers to erect steel. Carefully plan and lay out work so that a

minimum of cutting and removal of undamaged material will be necessary.

1.14 EXTRA WORK

A. Any potential work items that are found after the work has begun shall be brought to

the attention of the ENGINEER in writing via formal RFI. Submittal by e-mail is

acceptable. These out of scope items shall be approved by Owner‟s directive only.

PART 2 - PRODUCTS

2.01 MATERIALS

A. All materials shall be new and shall be in conformance with API-653 Standards.

B. Structural steel shapes, plates and bars: ASTM A36.

C. Machine bolts: Use ASTM A307 machine bolts at all connections not indicated on

Drawings as high-strength or stainless steel.



Section 13200


TEAM 13-0612 TS - 33

D. Pipe Flanges: ANSI B16.5 standard flanges.

E. Welding electrodes:

1. Mild steel-covered arc welding electrodes for A36 steels: AWS A5.1, E70XX

Series, low hydrogen, having a minimum yield point of 60,000 psi.

F. Geotextile: TenCate Mirafi® 135N, or approved equal. A needle punched, nonwoven geotextile composed of polypropylene fibers.

2.02 MATERIAL HANDLING

A. Storage of Materials

1. Store steel to be incorporated into this project above ground on platforms, skids

or other approved supports.

2. Protect steel from corrosion.

3. Store welding electrodes in accordance with AWS D12.1.

PART 3 - EXECUTION

3.02 FABRICATION

A. All fabrication shall be done by manufacturers who are regularly engaged in the

manufacture of the type of work herein specified.

3.03 SCHEDULE

A. All repair and renovation work shall be accomplished prior to start of any painting

operations.

3.04 ERECTION

A. All work shall be accomplished by skilled workmen in a workmanlike manner.

B. All welders shall hold current AWS certification and shall submit all credentials

to the Engineer prior to starting work.

C. All welding will be subject to testing in accordance with ASME Section V.

- END OF SECTION 13200 -

Cover01 Contents.pdf

Date post:	03-Feb-2021
Category:	Documents
Upload:	others
View:	2 times
Download:	0 times