addendum no: 5 - waco, texas adde… · sspc-pa1, ^shop, field and maintenance painting _. 1.6...

Date: RFB No: Commodity:

12/16/2019 2019-051 Ritchie Road Elevated Storage TankNew 2.0 MG Composite Elevsted Storage Tank &Demolishing of Existing 2.0 MG Spheroid Elevated Tank

Closing Time: 2:00 P.M., Thursday, December 19, 2019 Opening Time: 2:01 P.M., Thursday, December 19, 2019 Bid Opening Location: Purchasing Services Office

1415 N. 4th Street, Waco, TX ______________________________________________________

Addendum No: 5

The above-mentioned bid invitation has been changed in the following manner. Sign and return addendum to the Purchasing Office by the closing time and date with your RFB response. Returning this page signed by your authorized agent will serve to acknowledge this change. All other requirements of the invitation remain unchanged. If you have any questions, please call or stop by the Purchasing Office at the above address.

THE FOLLOWING IS BEING ISSUED AS ADDENDUM NO. 5

Firm: ___________________________________________________________________________________

Address: _________________________________________________________________________________

Signature of Person Authorized to Sign Bid: _____________________________________________________________________

Signor's Name and Title (print or type):_____________________________________________________________________________

Date: ____________________Telephone:___________________________Fax:_________________________

Purchasing Services Post Office Box 2570

Waco, Texas 76702-2570 254 / 750-8062

Fax: 254 / 750-8063 www.waco-texas.com

- Answers to Submitted Questions - Changes to Specifications- Details, attached.

RFB2019-051, Addendum 5 Page 1

December 2019 Coating and Painting Addendum 5 Project CWAC1800771 For Steel Water Storage Tanks 09 97 14 - 1

SECTION 09 97 14

COATING AND PAINTING FOR STEEL WATER STORAGE TANKS

PART 1 - GENERAL

1.1 SCOPE

A. The work of this section includes the coating of all interior surfaces, and the painting of all exterior surfaces.

B. Related Sections 1. Section 33 13 13- Water Storage Tank Disinfection. 2. Section 33 16 19 – Composite Elevated Water Storage Tank.

1.2 REFERENCE SPECIFICATIONS AND STANDARDS

A. Without limiting the general aspects of other requirements of these specifications, all surface preparation, coating and painting of interior and exterior surfaces and inspection shall conform to the applicable requirements of the Society for Protective Coatings, NACE International, ASTM (American Society for Testing and Materials), AWWA and the manufacturer's printed instructions. 1. ASTM (American Society for Testing and Materials)

a. ASTM D 520 - Standard Specification for Zinc Dust Pigment b. ASTM D 4417 - Standard Test Methods for Field Measurement of Surface Profile of

Blast Cleaned Steel c. ASTM E 337 - Standard Practice Test Method for Measuring Humidity with a

Psychrometer d. ASTM D2200 - Standard Methods of Evaluating Degree of Rusting on Painted

Surfaces 2. ANSI (American National Standards Institute)

a. ANSI/ASC 29.4 Exhaust Systems - Abrasive Blasting Operations – Ventilation and Safe Practice

b. ANSI/NSF Standard 61 - Drinking Water Components 3. AWWA (American Water Works Association)

a. AWWA D 102 - Coating Steel Water Storage Tanks 4. Consumer Product Safety Act, Part 1303 5. NACE International

a. NACE Publication TPC2 - Coatings and Linings for Immersion Service: Chapter 1 Safety, Chapter Surface Preparation, Chapter 3 Curing, and Chapter 4 Inspection

b. NACE Standard SP0178-2007 - Standard Recommended Practice – Fabrication Details, Surface Finish Requirements and Proper Design Considerations for Tanks and Vessels to be Lined for Immersion Service

c. NACE Standard SP0188-2006 - Standard Recommended Practice – Discontinuity (Holiday) Testing of Protective Coatings



d. NACE Standard RP0287-2002 - Field Measurement of Surface Profile of Abrasive Blast-Cleaned Steel Surfaces Using a Replica Tape

e. NACE Standard RP0288-2004 - Standard Recommended Practice, Inspection of Linings on Steel and Concrete

6. OSHA (Occupational Safety & Health Administration) a. 1915.35 - Standards – 29 CFR – Painting

7. SSPC (Society for Protective Coatings) a. SSPC-SP1 - Solvent Cleaning b. SSPC-SP2 - Hand Tool Cleaning c. SSPC-SP3 - Power Tool Cleaning d. SSPC-SP11 - Power Tool Cleaning to Bare Metal e. SSPC-PA-1 - Shop, Field and Maintenance Painting f. SSPC-PA-2 - Measurement of Dry Film Thickness with Magnetic Gages g. SSPC-PA-3 - Guide to Safety in Paint Application h. SSPC-Guide 12 - Guide for Illumination of Industrial Painting Project i. SSPC-VIS 1-89 - Pictorial Surface Preparation Standards for Painting Steel Surfaces j. SSPC Paint Spec 36 - Two Component Weatherable Aliphatic Polyurethane Topcoat,

Performance-Based 8. SSPC/NACE Joint Standards

a. SSPC-SP5/NACE 1 - White Metal Blast Cleaning b. SSPC-SP6/NACE 3 - Commercial Blast Cleaning c. SSPC-SP7/NACE 4 - Brush-Off Blast Cleaning d. SSPC-SP10/NACE 2 - Near-White Metal Blast Cleaning e. SSPC-WJ-4/NACE WJ-4 - Waterjet Cleaning of Metals

B. The Engineer's decision shall be final as the interpretation and/or conflict between any of the referenced specifications and standards contained herein.

1.3 SUBMITTALS

A. Section 01 33 00 - Submittal Procedures: Requirements for submittals.

B. Product Data: Submit data on finishing products.

C. Samples: 1. Submit two paper chip samples, 8 ½ x 11 inch in size illustrating range of colors and

textures available for each surface finishing product scheduled. 2. Submit two painted samples, illustrating selected colors and textures for each color and

system selected with specified coats cascaded. Submit on tempered hardboard, 8 ½ x 11 inch in size.

D. Manufacturer's Installation Instructions: Submit special surface preparation procedures, substrate conditions requiring special attention.

1.4 CLOSEOUT SUBMITTALS

A. Section 01 70 00 - Execution and Closeout Requirements: Closeout procedures.



B. Operation and Maintenance Data: Submit data on cleaning, touch-up, and repair of painted surfaces.

1.5 CONTRACTOR

A. The Contractor shall have three years practical experience and successful history in the application of specified product to surfaces of steel water tanks. Upon request, he shall substantiate this requirement by furnishing a list of references and job completions.

B. The Contractor shall submit with their bid a written statement by the coatings manufacturer stating that the Contractor is familiar with the materials specified and has workers capable of performing the work specified herein.

C. The personnel performing the work shall be knowledgeable and have the required experience and skill to adequately perform the work for this project, in accordance with SSPC-PA1, “Shop, Field and Maintenance Painting”.

1.6 QUALITY ASSURANCE

A. General: Quality assurance procedures and practices shall be utilized to monitor all phases of surface preparation, application and inspection throughout the duration of the project. Procedures or practices not specifically defined herein may be utilized provided they meet recognized and accepted professional standards and are approved by the Engineer.

B. Paint: 1. Comply with AWWA D102. 2. Certified by NSF International in accordance with NSF 61, as acceptable for surfaces in

contact with potable water. 3. Obtain paint products from single source for Work specified in this section. 4. Perform Work in accordance with City of Waco and AWWA standards, and TCEQ

regulations.

C. Surface Preparation: Surface preparation will be based upon comparison with: "Pictorial Surface Preparation Standards for Painting Steel Surfaces: SSPC-VIS 1-89”, ASTM D2200-95, "Standard Methods of Evaluating Degree of Rusting on Painted Surfaces”, ASTM D 4417-91, Method A and/or Method C or NACE Standard RP0287-2002. In all cases the written standard shall take precedence over the visual standard. In addition, NACE Standard SP0178-2007, along with the Visual Comparator, shall be used to verify the surface preparation of welds. 1. Prior to undertaking full-scale abrasive blasting operations, the contractor shall perform

a test blast on both the exterior and the interior of the tank in the presence of the Engineer or their representative. The test section shall be a minimum of five (5) feet high by five (5) feet wide. The Engineer or their representative shall verify that the surface cleanliness and profile meet the requirements of this specification before work is allowed to proceed. In the event the test section fails to comply with the requirements of this specification, the contractor shall be required to make suitable changes to the equipment and/or abrasive material and perform an additional test sections until compliance with the specification is demonstrated.



D. Application: No coating or paint shall be applied when: 1) the surrounding air temperature or the temperature of the surface to be coated or painted is below the minimum surface temperature for the products specified herein, 2) rain, snow, fog or mist is present, 3) the surface temperature is less than 5oF above the dew point, 4) the air temperature is expected to drop below the minimum temperature for the products specified within six hours after application of coating. Dewpoint shall be measured by use of an instrument such as a Sling Psychrometer in conjunction with U.S. Department of Commerce Weather Bureau Psychometric Tables. If any of the above conditions are prevalent, coating or painting shall be delayed or postponed until conditions are favorable. The day's coating or painting shall be completed in time to permit the film sufficient drying time prior to damage by atmospheric conditions.

E. Coating Thickness: Thickness of coatings and paint shall be measured checked according to the procedures outlined in SSPC-PA 2 “Measurement of Dry Film Thickness with Magnetic Gages”, May 2012 Edition. Dry film thickness shall be a Level 2 as defined in Paragraph 9.2, excepting that no single gage reading shall be less than 80% of the specified dry film thickness. Areas that fail to meet these criteria shall be corrected at no expense to the Owner. Use of an instrument such as a Tooke Gauge, precision groove grinder, etc. is permitted if a destructive test is deemed necessary by the Engineer and the total DFT is less than 50 mils.

F. Holiday (Pinhole) Testing: The integrity of interior coated surfaces shall be tested for holidays in accordance with NACE Standard SP0188-2006. For dry films less than 20 mils, a non-destructive holiday detector shall not exceed 67.5 volts, nor shall destructive holiday detector exceed the voltage recommended by the manufacturer of the coating system. A solution of 1 ounce non-sudsing type wetting agent, such as Kodak Photo-Flo, and 1 gallon of tap water shall be used to perform the holiday testing. For coating thickness at 20 mils and greater, a high voltage Tinker & Rasor AP/W holiday tester shall be used. Contact coating manufacturer for voltage recommendations and curing parameters. 1. All pinholes and/or holidays shall be marked and repaired in accordance with the

manufacturer's printed recommendations and retested. No pinholes or other irregularities will be permitted in the final coating.

G. Inspection Devices: The contractor shall furnish, until final acceptance of coating and painting is accepted, inspection devices in good working condition for detection of holidays and measurement of dry film thickness of coating and paint. The Contractor shall also furnish U.S. Department of Commerce, National Bureau of Standards certified thickness calibration plates and/or plastic shims, depending upon the thickness gauge used, to test the accuracy of dry film thickness gauges and certified instrumentation to test the accuracy of holiday detectors. Dry film gauges and holiday detectors shall be made available for the Engineer's use at all times until final acceptance of application. Holiday detection devices shall be operated in the presence of the Engineer.

H. Inspection: Inspection for this project shall consist of ‘hold point’ inspections. The Engineer or their representative shall inspect the surface prior to abrasive blasting, after abrasive blasting but prior to application of coating materials, and between subsequent coats of material. Final inspection shall take place after all coatings are applied, but prior to placing the tank in service. Contractor will insure that sufficient rigging is in place so that the Engineer or their representative shall be able to conduct the required inspections.



I. Warranty Inspection: Warranty inspection shall be conducted during the eleventh month following acceptance of all coating and painting work. All defective work shall be repaired in accordance with this specification and to the satisfaction of the Engineer and/or Owner.

1.7 SAFETY AND HEALTH REQUIREMENTS

A. General: In accordance with requirements set forth by regulatory agencies applicable to the construction industry and manufacturer's printed instructions and appropriate technical bulletins and manuals, the Contractor shall provide and require use of personal protective lifesaving equipment for persons working on or about the project site. The Contractor's work forces should comply with the provisions outlined in SSPC-PA-3 "A Guide to Safety in Paint Application".

B. Head and Face Protection and Respiratory Devices: Equipment shall include protective helmets which shall be worn by all persons while in the vicinity of the work. In addition, workers engaged in or near the work during sandblasting shall wear eye and face protection devices and air purifying half-mask or mouthpiece respirators with appropriate filters. Barrier creams shall be used on any exposed areas of skin.

C. Ventilation: Where ventilation is used to control hazardous exposure, all equipment shall be explosion-proof. Ventilation shall reduce the concentration of air contaminants to a degree a hazard does not exist. Air circulation and exhausting of solvent vapors shall be continued until coatings have fully cured.

D. Sound Levels: Whenever the occupational noise exposure exceeds maximum allowable sound levels, the Contractor shall provide and require the use of approved ear protection devices.

E. Illumination: Adequate illumination shall be provided while work is in progress, including explosion-proof lights and electrical equipment. Whenever required by the Engineer, the Contractor shall provide additional illumination and necessary supports to cover all areas to be inspected. The level of illumination for inspection purposes shall be determined by the Engineer.

F. Temporary Ladders and Scaffolding: All temporary ladders and scaffolding shall conform to applicable safety requirements. They shall be erected where requested by the Engineer to facilitate inspection and be moved by the Contractor to locations requested by the Engineer.

1.8 PRODUCT DELIVERY, STORAGE & HANDLING

A. All materials shall be brought to the jobsite in original sealed containers. They shall not be used until the Engineer has inspected the contents and obtained data from information on containers or label. Materials exceeding storage life recommended by the manufacturer shall be rejected.

B. All coatings and paints shall be stored in enclosed structures to protect them from weather and excessive heat or cold. Flammable coatings and paints must be stored to conform with City, County, State and Federal safety codes for flammable coating or paint materials. At all times coatings and paints shall be protected from freezing.



1.9 PAINT MANUFACTURER QUALIFICATIONS

A. Manufacturer: Company specializing in manufacturing products specified in this section with minimum ten years’ experience in tank coating application.

1.10 DELIVERY, STORAGE, AND HANDLING

A. Section 01 60 00 - Product Requirements: Requirements for transporting, handling, storing, and protecting products.

B. Deliver products to site in sealed and labeled containers; inspect to verify acceptability.

C. Container Label: Include manufacturer's name, type of paint, brand name, lot number, brand code, coverage, surface preparation, drying time, cleanup requirements, color designation, and instructions for mixing and reducing.

D. Paint Materials: Store at minimum ambient temperature of 45 degrees F and maximum of 90 degrees F, in ventilated area, and as required by manufacturer's instructions.

1.11 WARRANTY

A. Section 01 70 00 - Execution and Closeout Requirements: Requirements for warranties.

B. Furnish five year manufacturer warranty for traditional paints, 15 year manufacturer warranty for fluoropolymer coatings.

PART 2 - MATERIALS

2.1 ACCEPTABLE MANUFACTURERS

A. Materials specified are those that have been evaluated for the specific service. Products of the Tnemec Company, Inc. are listed to establish a standard of quality. Equivalent materials of other qualified manufacturer's may be submitted on written approval of the Engineer. As part of the proof of equality, the Engineer will require at the cost of the Contractor, certified test reports from a nationally known, reputable and independent testing laboratory conducting comparative tests as directed by the Engineer between the product specified and the requested substitution.

B. Requests for substitution shall include manufacturer's literature for each product giving name, product number, generic type, descriptive information, solids by volume, recommended dry film thickness and certified lab test reports showing results to equal the performance criteria of the products specified herein. In addition, a list of five (5) projects shall be submitted in which each product has been used and rendered satisfactory service.

C. All requests for product substitution shall be made at least 14 days prior to the bid date.

D. Any material savings shall be passed to the owner in the form of a contract dollar reduction.

E. Manufacturer's color charts shall be submitted to the Engineer at least 30 days prior to coating and/or paint application. General Contractor and Painting Contractor shall



coordinate work so as to allow sufficient time (normally seven to ten days) for paint to be delivered to the job site.

2.2 GENERAL REQUIREMENTS

A. All materials shall be lead-free as defined by the Consumer Product Safety Act, Part 1303.

B. All zinc dust pigment contained in any zinc-rich material shall meet the requirements of ASTM D 520 Type III with regard to zinc content and purity.

C. All materials for the interior wetted portion of the tank shall meet the requirements of ANSI/NSF Standard 61 for potable water contact.

D. All catalyzed polyurethane products shall meet the minimum requirements of SSPC Paint Specification Number 36, Level 3 Performance Level.

E. No products containing MOCHA shall be allowed.

F. No inorganic zinc-rich primers shall be permitted on the tank interior surfaces.

2.3 MATERIAL PREPARATION

A. Mix and thin materials according to manufacturer's latest printed instructions.

B. Do not use materials beyond manufacturer's recommended shelf life.

C. Do not use mixed materials beyond manufacturer's recommended pot life.

D. Do not split kits of multi-component products.

2.4 PRECONSTRUCTION PRIMER (PCP)

A. The Contractor may choose to use inorganic zinc-rich PCP (lead free per Part 1202 of The Consumer Product Safety Act) applied at the factory on the steel tank panels interior and exterior surfaces. The approval by the Engineer and use of PCP is contingent on the following conditions: 1. The steel surface preparation prior to application of PCP must meet the minimum of

SSPC-SP10 Near-White Metal Blast Cleaning standards with a uniform minimum 2.0-mil angular surface profile.

2. In the field, all damaged and unprimed exterior exposed steel (scratched, etc.) shall be minimally prepared in accordance with SSPC-SP6 Commercial Blast Cleaning standards to produce a uniform minimum 2.0-mil angular surface profile. Also, all damaged and unprimed interior exposed steel (scratched, etc.) shall be minimally prepared in accordance with SSPC-SP10 Near-White Metal Blast Cleaning standards to produce a uniform minimum 2.0-mil angular surface profile.

3. The dry film thickness of the PCP shall not count as part of the total thickness requirements specified herein, and the coating system specified shall be installed on properly prepared surfaces at the thicknesses originally specified.



4. Contractor may prepare steel tank panel surfaces that have been factory coated with “lead free” zinc-rich PCP using SSPC-SP& Brush-Off Blast Cleaning methods prior to installing the specified coating system herein.

2.5 TANK INTERIOR COATING SYSTEMS

A. High-Build, Zinc/Epoxy System: 1. Weld Preparation: Weld flux and spatter shall be removed by power tool cleaning. Sharp

projections shall be ground to a smooth contour. All welds shall be ground to a smooth contour as per NACE Standard SP0178, Designation D.

2. Surface Preparation: SSPC-SP10/NACE 2 Near-White Metal Blast Cleaning. An angular profile of 2.0 to 3.0 mils as per ASTM D 4417, Method C or NACE Standard RP0287 is required.

3. Interior Tank “Wet” Coating System (All inside surfaces of tank bowl): a. Tnemec

1) First Coat: Tnemec Series 94-H2O Hydro-Zinc applied at 2.5 to 3.5 dry mils. Thin only with approved thinner, Tnemec 41-3 or 41-49 Thinner.

2) Stripe Coat: Tnemec Series 20HS-1255 Pota-Pox applied by brush to all weld seams, edges, corners, bolts, nuts and other difficult to coat areas. Thin only with approved thinner, Tnemec 41-4 Thinner.

3) Second Coat: Tnemec Series 22-WH07 Off-White Epoxoline applied at 18.0 to 24.0 dry mils. Thin only with approved thinner, Tnemec 41-2 Thinner.

4) Total dry film thickness shall be a minimum of 20.5 mils. 5) Series 44-710 Accelerator must be used with Series 94-H2O if the surface

temperature is 35°F to 60°F and 20% to 40% relative humidity. 6) For cold weather applications, use Series FC20HS in lieu of Series 20HS. 7) Contractor may opt to use Tnemec Series 141-WH07 Off-White Epoxoline

applied at 18.0-24.0 dry mils for the interior roof ceiling (above water level only) in lieu of Series 22 Epoxoline.

b. Sherwin Williams 1) First Coat: Sherwin-Williams Corothane I Galvapac, B65G10/B69D210, 2.5-3.5

mils DFT 2) Stripe Coat: Sherwin-Williams Macropoxy 646 PW, B58-X-600 Series, applied

by brush to all weld seams, edges, corners, bolts, nuts and other difficult to coat areas

3) Second Coat: Sherwin-Williams Duraplate UHS, B62-210 Series, 18-24 mils DFT 4) Total dry film thickness shall be a minimum of 20.5 mils.

4. Interior Tank “Dry” Coating System (Dry side access tube): a. Tnemec

1) First Coat: Tnemec Series 94-H2O Hydro-Zinc applied at 2.5 to 3.5 dry mils. Thin only with approved thinner, Tnemec 41-3 or 41-49 Thinner.

2) Stripe Coat: Tnemec Series 20HS-1255 Pota-Pox applied by brush to all weld seams, edges, corners, bolts, nuts and other difficult to coat areas. Thin only with approved thinner, Tnemec 41-4 Thinner.

3) Second Coat: Tnemec Series 20HS-WH07 Off-White Epoxoline applied at 6.0 to 10.0 dry mils. Thin only with approved thinner, Tnemec 41-2 Thinner.

4) Total dry film thickness shall be a minimum of 12.5 mils. 5) Series 44-710 Accelerator must be used with Series 94-H2O if the surface

temperature is 35°F to 60°F and 20% to 40% relative humidity.



6) For cold weather applications, use Series FC20HS in lieu of Series 20HS. b. Sherwin-Williams

1) First Coat: Sherwin-Williams Corothane I Galvapac, B65G10/B69D210, 2.5-3.5 mils DFT

2) Stripe Coat: Sherwin-Williams Macropoxy 646 PW, B58-X-600 Series, applied by brush to all weld seams, edges, corners, bolts, nuts and other difficult to coat areas.

3) Second Coat: Sherwin-Williams Macropoxy 646 PW, B58-X-600 Series applied at 6.0 to 10.0 dry mils.

4) Total dry film thickness shall be a minimum of 12.5 mils.

2.6 TANK EXTERIOR COATING SYSTEMS

A. Logo Fluoropolymer Urethane System: 1. Weld Preparation: Weld flux and spatter shall be removed by power tool cleaning.

Sharp projections shall be ground to a smooth contour. All welds shall be ground to a smooth contour as per NACE Standard SP0178, Designation D.

2. Surface Preparation: SSPC-SP6/NACE 3 Commercial Blast Cleaning. An angular profile of 1.5 to 2.5 mils as per ASTM D 4417, Method C or NACE Standard RP0287 is required.

3. Coating System: a. Logo Coat: Tnemec Series 700 HydroFlon applied at 3.0 to 4.0 dry mils. Thin only

with approved thinner, Tnemec 41-63 Thinner for spray, brush or roller. b. Logo Coat: Sherwin-Williams Fluorokem HS, B65-580 Series, 3.0-4.0 mils DFT. c. For cold weather applications, Series 44-710 Urethane Accelerator may be added

to Series 700 at the rate specified on the Series 44-710 product data sheet. 4. Logo color shall be 78BL Old Glory Blue (or approved equal). Submit samples in

accordance with Section 1.3 and 2.1E.

B. Three-Coat Fluoropolymer Urethane System: 1. Weld Preparation: Weld flux and spatter shall be removed by power tool cleaning.

Sharp projections shall be ground to a smooth contour. All welds shall be ground to a smooth contour as per NACE Standard SP0178, Designation D.

2. Surface Preparation: SSPC-SP6/NACE 3 Commercial Blast Cleaning. An angular profile of 1.5 to 2.5 mils as per ASTM D 4417, Method C or NACE Standard RP0287 is required.

3. Coating System: a. Tnemec

1) 1st Coat: Tnemec Series 94-H2O Hydro-Zinc applied at 2.5 to 3.5 dry mils. Thin only with approved thinner, Tnemec 41-2 or 41-3 Thinner.

2) 2nd Coat: Tnemec Series 73 Endura-Shield applied at 2.0 to 3.0 dry mils. 3) 3rd Coat: Tnemec Series 700 HydroFlon applied at 2.0 to 3.0 dry mils. Thin

only with approved thinner, Tnemec 41-63 Thinner for spray, brush, or roller. 4) Total dry film thickness shall be a minimum of 9.0 mils. 5) For cold weather applications, Series 44-710 Urethane Accelerator may be

added to Series 73 and Series 700 at the rate specified on the Series 44-710 product data sheet.

6) Series 44-710 Accelerator must be used with Series 94-H2O if the surface temperature is 35°F to 60°F and 20% to 40% relative humidity.

b. Sherwin-Williams



1) First Coat: Sherwin-Williams Corothane I Galvapac, B65G10/B69D210, 2.5-3.5 mils DFT

2) 2nd Coat: Sherwin-Williams Acrolon 218 HS Polyurethane applied at 2.0 to 3.0 dry mils.

3) 3rd Coat: Sherwin-Williams Fluorokem HS, B65-580 Series, 3.0-4.0 mils DFT. 4) Total dry film thickness shall be a minimum of 9.0 mils.

4. Tank color shall be white. Contractor shall submit white color samples for preapproval. Submittal for tank color shall be in accordance with Section 1.3 and 2.1E.

PART 3 - EXECUTION

3.1 GENERAL

A. All surface preparation, coating and painting shall conform to applicable standards of the Society for Protective Coatings, NACE International and the manufacturer's printed instructions. Materials applied to the surface prior to the approval of the Engineer shall be removed and re-applied to the satisfaction of the Engineer at the expense of the contractor.

B. All work shall be performed by skilled craftsmen qualified to perform the required work in a manner comparable with the best standards of practice. Continuity of personnel shall be coordinated with the Engineer.

C. The Contractor shall provide a supervisor at the work site during cleaning and application operations. The supervisor shall have the authority to sign change orders, coordinate work and make decisions pertaining to the fulfillment of the contract.

D. Dust, dirt, oil, grease or any foreign matter that will affect the adhesion or durability of the coating or paint must be removed by washing with clean rags dipped in an approved cleaning solvent and wiped dry with clean rags.

E. Coating and painting systems include surface preparation, prime coating and finish coatings. All prime coats shall be field applied.

F. The Contractor's coating and painting equipment shall be designed for application of materials specified and shall be maintained in first class working condition. Compressors shall have suitable traps and filters to remove water and oils from the air. Contractor's equipment shall be subject to approval of the Engineer.

G. Application of the first coat shall follow immediately after surface preparation and cleaning and stripe coat, if applicable, before rust bloom occurs or the same day, whichever is less. Any cleaned areas not receiving first coat within this period shall be recleaned prior to application of first coat. Use of dehumidification equipment shall be first reviewed by the Engineer and coatings manufacturer prior to deviating from this provision.

H. Prior to assembly, all surfaces made inaccessible after assembly shall be prepared as specified herein and shall receive the coating or paint system specified.

I. Contractor shall provide and be responsible for containment on the project during surface preparation, coating and painting operations to protect the tank structure, coatings and the environment. Containment shall, at a minimum, meet all TCEQ regulations and SSPC Guide-6



requirements, preventing airborne contaminants from damaging the prepared tank surfaces and coatings, as well as preventing blasting media, overspray and other airborne particulates from causing damage to surrounding properties.

3.2 SURFACE PREPARATION

A. The latest revision of the following surface preparation specifications of the Society for Protective Coatings (SSPC) shall form a part of this specification. The summaries listed below are for informational purposes; consult the actual SSPC specification for full detail. 1. Solvent Cleaning (SSPC-SP1): Removal of oil, grease, soil and other contaminants by use

of solvents, emulsions, cleaning compounds, steam cleaning or similar materials and methods which involve a solvent or cleaning action.

2. Hand Tool Cleaning (SSPC-SP2): Removal of loose rust, loose mil scale and other detrimental foreign matter to a degree specified by hand chipping, scraping, sanding and wire-brushing

3. Power Tool Cleaning (SSPC-SP3): Removal of loose rust, loose mil scale and other detrimental foreign matter by power wire-brushing, power impact tools or power sanders.

4. White Metal Blast Cleaning (SSPC-SP5/NACE No. 1): Air blast cleaning to a gray-white uniform metallic color until each element of surface area is free of all visible residues.

5. Commercial Blast Cleaning (SSPC-SP6 NACE No. 3): Air blast cleaning until at least two-thirds of each element of surface area is free of all visible residues.

6. Brush-Off Blast Cleaning (SSPC-SP7 NACE No. 4): Air blast cleaning to remove loose rust, loose mil scale and other detrimental foreign matter to a degree specified.

7. Near-White Metal Blast Cleaning (SSPC-SP10 NACE No. 2): Air blast cleaning until at least 95% of each element of surface area is free of all visible residues.

8. Power Tool Cleaning to Bare Metal (SSPC-SP11): Differs from SSPC-SP3 in that it requires more thorough cleaning and a surface profile not less than 1 mil.

9. Waterjet Cleaning of Metals (SSPC-WJ-4/NACE WJ-4): Waterjet (pressure washing) of coated and uncoated metal surfaces.

B. Slag, weld metal accumulation and spatters not removed by the Fabricator, Erector or Installer shall be removed by chipping and/or grinding. All sharp edges shall be peened, ground or otherwise blunted as required by the Engineer. All grinding and finishing of welds, edges, etc. shall be performed prior to solvent cleaning and abrasive blasting. Welds shall be prepared as per NACE Standard SP0178 for all interior and exterior surfaces: 1. Butt Welds: Shall be ground smooth and free of all defects, designation “D”. 2. Lap Welds: Shall be ground smooth and blended, designation “D”. 3. Fillet Welded Tee Joint: Shall be ground smooth and blended, designation “D”.

C. Field blast cleaning for all surfaces shall be by dry method unless otherwise directed. Blast nozzles shall be venturi-type nozzles with a minimum pressure at the nozzle of 90 psi.

D. Particle size of abrasives used in blast cleaning shall be that which will produce the specified surface profile or in accordance with recommendations of the manufacturer of the specified coating or paint system to be applied. 1. If the profile of the blasted steel exceeds the profile specified above, the Contractor

shall be required to do one or both of the following: a. Reblast the surface using a finer aggregate in order to produce the required profile.



b. Apply a thicker prime coat, if possible given the limitations of the products being applied, in order to adequately cover the blast profile

E. Abrasive used in blast cleaning operations shall be new, washed, graded and free of contaminants that would interfere with adhesion of coating or paint and shall not be reused unless specifically approved in writing by the Engineer.

F. During blast cleaning operations, caution shall be exercised to insure that existing coatings or paint are not exposed to abrasion from blast cleaning.

G. The Contractor shall keep the area of their work and the surrounding environment in a clean condition. He shall not permit blasting materials to accumulate as to constitute a nuisance or hazard to the accomplishment of the work, the operation of the existing facilities or to the surrounding environment.

H. Blast cleaned surfaces shall be cleaned prior to application of specified coatings or paint. All surfaces shall be free of dust, dirt, and other residue resulting from the abrasive blasting operation. No coatings or paint shall be applied over damp or moist surfaces.

I. All welds not scheduled to be abrasive blasted or finished by grinding or sanding with power tools as per SSPC-SP3 or SP11 shall be neutralized with a suitable chemical compatible with the specified coating or paint.

J. Pitted areas on the tank interior shall be repaired by either filling with Tnemec Series 215 Surfacing Epoxy or Tnemec Series FC22 Epoxoline (floor) or by welding. Epoxy filler shall be feathered smooth. Filler shall be applied between the prime coat and the succeeding coat. No protrusions or spatter will be allowed. Pits deeper than 1/8” shall be filled by welding.

K. Specific Surface Preparation: Surface preparation for the specific system shall be as noted in Sections 2.4 and 2.5.

3.3 NON-VISIBLE CONTAMINANTS

A. Surface shall be checked in three locations for the presence of chlorides, free iron and sulfates. New tanks shall be tested prior to abrasive blasting, tanks being rehabilitated shall be tested prior to blasting. If blisters are present in existing tank, testing shall also be performed after abrasive blasting. These tests are an Iron Test (Fe2+), Chloride Test and Sulfate Test. Testing shall be carried out as per SSPC Technology Guide 15 “Field Methods for Retrieval and Analysis of Soluble Salts on Steel and Other Nonporous Substrates”. The maximum limits for these contaminants shall be: 1. The maximum level of chlorides is 30 milligrams per square meter or 3 micrograms per

square centimeter. 2. The maximum level of sulfates is 100 milligrams per square meter or 10 micrograms per

square centimeter. 3. The maximum level of ferrous ions (Fe2+) is 50 milligrams per square meter or 5

micrograms per square centimeter. 4. Contamination levels above these limits will require washing and retesting in

accordance with Item 2 (below) until the surface is under the allowable limits.



B. If testing shows amounts present in the test solution to be greater than the limits listed herein, the Contractor shall clean the surface of the entire tank interior with a 5,000 psi water blast with fine entrained abrasive until the levels in the test solutions are below the maximum acceptable level. Alternate cleaning methods may be allowed with prior approval of the Engineer. Surface shall be reblasted as specified in 2.4 at no additional cost to the Owner.

C. Contractor shall provide a written statement from paint manufacturer stating that the maximum acceptable levels are not less than those listed herein. Results of the testing shall be provided to the Owner before any coatings are applied.

D. The following test kits are approved for use on this project: 1. Chlor*Rid Chor*Test Kit 2. KTA SCAT Test Kit 3. Test kits from other vendors shall be submitted to the Engineer for approval before use.

3.4 APPLICATION, GENERAL

A. Coating and paint application shall conform to the requirements of the Society for Protective Coatings Paint Application Specification SSPC-PA1, latest revision, for "Shop, Field and Maintenance Painting".

B. Thinning shall be permitted only as recommended by the manufacturer and approved by the Engineer, and utilizing the thinners stated in Sections 2.4 and 2.5.

C. Each application of coating or paint shall be applied evenly, free of brush marks, sags, runs, with no evidence of poor workmanship. Care shall be exercised to avoid lapping on glass or hardware. Coatings and paints shall be sharply cut to lines. Finished surfaces shall be free from defects or blemishes.

D. Protective coverings or drop cloths shall be used to protect floors, fixtures and equipment. Care shall be exercised to prevent coatings or paints from being spattered onto surfaces which are not to be coated or painted. Report to the Engineer surfaces from which materials cannot be satisfactorily removed.

E. When two coats of coating or paint are specified, where possible, the first coat shall contain sufficient approved color additive to act as an indicator of coverage or the two coats must be of contrasting color.

F. Film thickness per coat as specified in Sections 2.4 and 2.5 are the minimum required. If roller application is deemed necessary, the Contractor shall apply additional coats as to achieve the specified thickness.

G. All material shall be as specified.

3.5 COATING SYSTEMS APPLICATION

A. After completion of surface preparation as specified for the specific system, materials shall be applied as noted in Sections 2.4 and 2.5.



B. Care shall be taken so as to eliminate overspray and dry spray on the tank interior. Where such conditions are encountered, the surface shall be cleaned of all over spray and dry spray prior to the application of the succeeding coat.

C. Areas rendered inaccessible after tank erection such as the spaces between roof plates and rafters shall receive the full coating system prior to erection and/or assembly.

3.6 REPAIRS

A. After the interior coating system has been installed and holiday tested, repair pinholes and voids as follows: 1. Abrasive blasting shall be in accordance with SSPC-SP10/NACE No.2 Near White Blast

Cleaning obtaining a minimal surface profile as specified herein. 2. Power tool cleaning shall be in accordance with SSPC-SP11 Power Tool Cleaning to Bare

Metal. Surface profile shall be angular and not less than the surface profile as specified herein.

3. All edges of remaining sound, tightly adhering coating shall be feathered back (beveled) to create a smooth transition from the substrate to the coatings surface. The coating may be considered tightly adhering if an edge cannot be lifted with a dull putty knife.

4. Install the coating system as specified herein to provide a complete and monolithic system, free of voids and pinholes.

B. For exterior surfaces, repair as follows: 1. Hand or Power Tool Sand as per SSPC-SP2 or SP3 to remove the defect. In cases where

the defect extends to the substrate, prepare the surface as per SSPC-SP11 Power Tool Cleaning to Bare Metal, obtaining a minimum anchor profile as specified herein.

2. All edges of remaining sound, tightly adhering coating shall be feathered back (beveled) to create a smooth transition from the substrate to the coatings surface. The coating may be considered tightly adhering if an edge cannot be lifted with a dull putty knife.

3. Install the coating system as specified herein to provide a complete and monolithic system, free of voids and pinholes.

3.7 SOLVENT VAPOR REMOVAL

A. All solvent vapors shall be completely removed by suction-type exhaust fans and blowers before placing tank in operating service.

B. All solvent vapors will be exhausted both during and after coating application as per AWWA D 102 to allow the proper curing of the coating material.

C. Ventilation shall be continued until such time as the coating has reached “full cure” as specified by the coating manufacturer.

3.8 DISINFECTION

A. Disinfection shall be as specified in Section 33 13 00.



3.9 CLEAN UP

A. Upon completion of the work, all staging, scaffolding and containers shall be removed from the site or destroyed in a manner approved by the Engineer. Coating or paint spots or oil stains upon adjacent surfaces shall be removed and the jobsite cleaned. All damage to surfaces resulting from the work of this section shall be cleaned, repaired or refinished to the satisfaction of the Engineer at no cost to the Owner.

END OF SECTION


December 2019 Addendum 5 Project CWAC1800771 Ornamental Steel Roll Gate System 32 31 05 - 1

SECTION 32 31 05

ORNAMENTAL STEEL ROLL GATE SYSTEM

PART 1 - GENERAL

1.1 WORK INCLUDED

A. The contractor shall provide all labor, materials and appurtenances necessary for installation of the industrial ornamental steel roll gate system defined herein at the Ritchie Road Elevated Storage Tank project site.

1.2 RELATED WORK

A. Section 03 30 00 – Cast-in-Place Concrete.

B. Section 31 05 13 – Soils for Earthwork.

C. Section 31 05 16 – Aggregate for Earthwork

D. Section 31 23 16 – Excavation.

E. Section 31 23 23 – Fill.

1.3 SYSTEM DESCRIPTION

A. The manufacturer shall supply a total industrial ornamental steel roll gate system of the Ameristar® PassPort II® Classic™ design represents the standard for design and minimum requirements for the fence system. The system shall include all components (i.e., pickets, rails, gate uprights, wheels and hardware) required.


A. Delegated Engineering Responsibility: Require installer of ornamental metal fences and gates to employ a professional engineer, licensed in the state where the project is located, to provide engineering design for the post foundations based on local conditions, and to affix their professional seal to the shop drawings for the foundations.

B. The contractor shall provide laborers and supervisors who are thoroughly familiar with the type of construction involved and materials and techniques required/specified.

C. Preinstallation Conference: Conduct conference at Project site with Engineer prior to installation.

D. Manufacturer Qualifications: Company specializing in manufacturing Products specified in this section with minimum five years documented experience.

E. Installer Qualifications: Experienced with type of construction involved with specified materials with a minimum 7 years’ experience and per manufacturer’s instructions.



F. Mockups: Build mockups to verify selections made under sample submittals, to demonstrate aesthetic effects, and to set quality standards for fabrication and installation. 1. Include 2-foot length of gate complying with requirements. 2. Subject to compliance with requirements, approved mockups may become part of the

completed Work if undisturbed at time of Substantial Completion.

1.5 REFERENCES

A. ASTM A653/A653M - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy Coated (Galvannealed) by the Hot-Dip Process.

B. ASTM B117 - Practice for Operating Salt-Spray (Fog) Apparatus.

C. ASTM B221 – Aluminum and Aluminum Alloy Extruded Bars, Shapes and Tubes

D. ASTM D523 - Test Method for Specular Gloss.

E. ASTM D714 - Test Method for Evaluating Degree of Blistering in Paint.

F. ASTM D822 - Practice for Conducting Tests on Paint and Related Coatings and Materials using Filtered Open-Flame Carbon-Arc Light and Water Exposure Apparatus.

G. ASTM D1654 - Test Method for Evaluation of Painted or Coated Specimens Subjected to Corrosive Environments.

H. ASTM D2244 - Test Method for Calculation of Color Differences from Instrumentally Measured Color Coordinates.

I. ASTM D2794 - Test Method for Resistance of Organic Coatings to the Effects of Rapid Deformation (Impact).

J. ASTM D3359 - Test Method for Measuring Adhesion by Tape Test.

1.6 SUBMITTAL

A. The manufacturer's submittal package shall be provided prior to installation per Section 01 33 00.

B. Product Data: Manufacturer’s technical literature for each product specified. 1. Include preparation instructions and recommendations. 2. Include storage and handling requirements and recommendations. 3. Include manufacturer’s installation instructions.

C. Shop Drawings: Elevations of fencing panels, spacing of components, hardware, and gates. Provide foundations for fence post shop drawings by professional engineer.

D. Samples for Initial Selection: For each finish product and finish specified, sets of color chips representing manufacturer’s full range of available colors.



E. Samples for Verification: For each fence material and for each color specified representing each color specified. 1. Provide samples 24 inches square of replica of gate.

1.7 PRODUCT HANDLING AND STORAGE

A. Upon receipt at the job site, all materials shall be checked to ensure that no damages occurred during shipping or handling. Materials shall be stored in such a manner to ensure proper ventilation and drainage, and to protect against damage, weather, vandalism and theft.

1.8 PRODUCT WARRANTY

A. All structural gate components (i.e., pickets, rails, diagonals, and uprights) shall be warranted within specified limitations, by the manufacturer for a period of 10 years from date of original purchase. Warranty shall cover any defects in material finish, including cracking, peeling, chipping, blistering or corroding.

B. Reimbursement for labor necessary to restore or replace components that have been found to be defective under the terms of manufactures warranty shall be guaranteed for five (5) years from date of original purchase.

PART 2 - MATERIALS

2.1 MANUFACTURER

A. Approved Manufacturers: 1. Ameristar Fence Products, Inc; 1555 N. Mingo, Tulsa OK 74116. Toll Free: (888) 333-

3422. Web: www.ameristarfence.com.

B. Substitutions: Submit request for substitution according to Division 01 requirements.

2.2 MATERIAL

A. All industrial ornamental steel roll gates shall conform to the Ameristar® PassPort II® gate system, Classic™ design, manufactured by Ameristar Perimeter Security USA Inc., in Tulsa, Oklahoma. The project gate schedule shall include the following additional information for each roll gate included in the project scope: 21-foot nominal opening, 8-foot nominal height, right gate travel direction when viewing from outside fence line looking in.

B. Steel material for roll gate components (i.e. pickets, rails, diagonals and uprights), shall be commercial steel with a minimum yield strength of 45,000 psi.

C. Ornamental picket material shall be 1” square x 14 Ga. Tubing. Picket spacing shall be 4-3/4”. Material for toprails, uprights and diagonals rails shall be 2” square x 12 Ga. Material for the bottom rail shall be 2” x 4” x 11 Ga. Posts shall be a minimum of 4” square x 11 Ga.

D. Concrete: Types specified in Section 03 30 00 Cast-in-Place Concrete.



2.3 FABRICATION

A. Pickets/pales, rails, uprights and posts shall be precut to specified lengths. Diagonals shall be precut to specified lengths and angles. Frame materials shall be joined by welding. Pickets/pales shall be face welded to roll gate frame, except for Invincible or Gauntlet style gates over 18’ long. Invincible or Gauntlet style gates over 18’ long shall have pickets face-welded to 2” x 2” angle iron to form panels equal in length to the gate frame bay width.

B. The manufactured roll gates and bolt-on panels (if applicable) shall be subjected to the PermaCoat® thermal stratification coating process (high-temperature, in-line, multi-stage, multi-layer) including, as a minimum, a six-stage pre-treatment/wash (with zinc phosphate), an electrostatic spray application of an epoxy base, and a separate electrostatic spray application of a polyester finish. The base coat shall be a thermosetting epoxy powder coating (gray in color) with a minimum thickness of 2 mils (0.0508mm). The topcoat shall be a “no-mar” TGIC polyester powder coat finish with a minimum thickness of 2 mils (0.0508mm). The color shall be Black. The stratification-coated framework shall be capable of meeting the performance requirements for each quality characteristic shown in Table 1.

C. Completed gates shall be capable of supporting a 200 lb. load applied at midspan without permanent deformation.

PART 3 - EXECUTION

3.1 PREPARATION

A. All new installation shall be laid out by the contractor in accordance with the construction plans.

3.2 GATE INSTALLATION

A. Gateposts shall be set in accordance with the spacing’s shown in the construction plans. The “Earthwork” and “Concrete” sections of this specification shall govern post base material requirements. 6” wheels shall be bolted to the gate (between the wheel plates welded near the ends of the gate bottom rail). The gate shall be set upright with the V-grooved wheels positioned over the pre-installed steel V-track that traverses the gate opening. Roller guides shall be affixed to the gateposts at a height even with the gate toprail to hold the gate in a vertical position. Gate stops shall be welded to the end of the gate or track so gate cannot pass rollers in either direction.

B. Gate to be installed per manufacturers gate installation instructions. Gate shall be installed in compliance with ASTM F2200 standards.

3.3 CLEANING

A. The contractor shall clean the jobsite of excess materials; post-hole excavations shall be scattered uniformly away from posts.



Table 1 – Coating Performance Requirements

Quality Characteristics

ASTM Test Method Performance Requirements

Adhesion D3359 – Method B Adhesion (Retention of Coating) over 90% of test area (Tape and knife test).

Corrosion Resistance B117, D714 & D1654 Corrosion Resistance over 1,000 hours (Scribed per D1654; failure mode is accumulation of 1/8” coating loss from scribe or medium #8 blisters).

Impact Resistance D2794 Impact Resistance over 60 inch lb. (Forward impact using 0.625” ball).

Weathering Resistance

D822 D2244, D523 (60˚ Method)

Weathering Resistance over 1,000 hours (Failure mode is 60% loss of gloss or color variance of more than 3 delta-E color units).

END OF SECTION


November 2019 Composite Elevated Addendum 5 Project CWAC1800771 Water Storage Tank 33 16 19 - 1

SECTION 33 16 19

COMPOSITE ELEVATED WATER STORAGE TANK

PART 1 - GENERAL

1.1 SUMMARY

A. This section includes the design, construction, testing, and commissioning of a 2.0-million gallon AWWA D107 composite elevated tank and related work including foundation, all painting, piping and valves, electrical, mechanical, and appurtenances as shown on the Drawings and as specified herein. The composite elevated tank in its entirety shall be the product of one Tank Constructor.

B. Related Documents 1. Drawings and the general provisions of this document, including General Conditions,

Supplemental Conditions, Special Provisions and other Division 1 Sections apply to work in this section.

1.2 REFERENCES

A. American Concrete Institute (ACI) 1. 117- 90 Standard Tolerances for Concrete Construction and Materials 2. 304-89 Guide for Measuring, Mixing, Transporting and Placing Concrete 3. 305-91 Hot Weather Concreting 4. 306-88 Cold Weather Concreting 5. 318-95 Building Code Requirements for Structural Concrete 6. 347-94 Guide to Formwork for Concrete

B. American Institute of Steel Construction (AISC) 1. S335 Specification for Structural Steel Buildings

C. American National Standards Institute (ANSI) 1. B16.5 Pipe Flanges and Flanged Fittings

D. American Petroleum Institute (API) 1. 650 Welded Steel Tanks for Oil Storage

E. American Society for Testing Materials (ASTM) 1. A 123 Zinc Coatings on Iron and Steel Products 2. A 240 Stainless Steel Plate, Sheet and Strip for Pressure Vessels 3. A 285 Pressure Vessel Plates, Carbon Steel 4. A 774 Welded Stainless Steel Fittings 5. A 778 Welded Stainless Steel Tubular Products

F. American Water Works Association (AWWA) 1. D100-96 Welded Steel Tanks for Water Storage 2. D102-97 Coating Steel Water Storage Tanks 3. D107 Composite Elevated Tanks for Water Storage 4. C652-92 Disinfection of Water Storage Facilities



G. Federal Aviation Administration (FAA) 1. 70/7460-1H Obstruction Marking and Lighting

H. National Association of Corrosion Engineers (NACE) 1. RP0178

I. National Fire Protection Association (NFPA) 1. NEC National Electric Code 2. 780 Standard for the Installation of Lightning Protection Systems

J. National Sanitation Foundation (NSF) 1. 61 Standard for Drinking Water System Components

K. Occupational Safety and Health Administration (OSHA) 1. 29 CFR Part 1926 Safety and Health Regulations for Construction

L. Steel Structures Painting Council (SSPC) 1. VIS-89 Visual Standard for Abrasive Blast Cleaned Steel

M. Texas Commission on Environmental Quality (TCEQ) 1. §290.43 – Water Storage – Rules and Regulations for Public Water Systems

1.3 SYSTEM DESCRIPTION

A. Elevated Tank 1. The composite elevated tank shall consist of the following: foundation, reinforced

concrete support structure and a welded steel water tank. The support structure shall extend vertically from the foundation as a circular concrete wall. A structural concrete dome shall be provided as structural support for the steel tank within the perimeter of the wall. A reinforced concrete ring beam shall be provided to connect the steel tank, concrete dome and concrete support wall. The elevated tank shall be in accordance with the shape, dimensions and details required by these specifications and drawings.

B. Operating Parameters

Minimum capacity within operating range 2,000,000 gallon

Maximum operating range 45 ft.

Maximum fill/discharge rate 18,000 gpm

Elevation - overflow/top capacity elevation 855.00 ft.

- pedestal floor elevation 718.57 Ft.

Inlet/Outlet pipe diameter 24 (min)* inches

Overflow pipe diameter 18 (min)** inches

Maximum drain rate (under typical operating conditions, Tank Constructor shall design based on broken pipe analysis) 2,500 GPM

*Tank Constructor is responsible for sizing this pipe diameter. 24” is minimum.

**Tank Constructor is responsible for sizing this pipe diameter. 18” is minimum.



C. General Design 1. Design Standards - The structural design of the elevated storage tank shall conform to

the following design standards except as modified or clarified by this section. In case of conflict between the Code and the criteria listed below, the more stringent requirement shall apply. a. Foundations and Support Structure IBC 2015, ASCE/SEI, ACI, AISC, and TMS as

documented in the drawings. b. Tank Foundation

1) Minimum requirements: Tank foundation requirements as shown on the Plans and specified herein are for bidding purposes only. Tank Constructor shall design a final foundation based on the minimum concept shown for the specific details of the composite tank. Complete drawings and calculations of the final tank foundation shall be submitted to the Engineer for review. Calculations and drawings shall be sealed by the Tank Constructor’s engineer registered in the State of Texas who will become the Engineer-of-Record for the final foundation.

2) The geotechnical report conducted by others as included herein is for reference only and is made available to the Tank Constructor for convenience and bidding purposes. The accuracy and completeness of the information is not guaranteed. Tank Constructor shall conduct geotechnical investigations as necessary to design foundation of the tank. There shall not be any additional payment or extension of contract time to the Tank Constructor for additional geotechnical investigations and resulting additional work that may be required to complete the Project. Tank Constructor shall meet the minimum foundation design required in the drawings and as specified herein.

c. Steel Tank AWWA D107.

D. Design Loads 1. Refer to code references per Sheet S1.1 of the project drawings.

E. Wind and Seismic Loads 1. Refer to code references per Sheet S1.1 of the project drawings.

F. Foundation Loads 1. Refer to code references per Sheet S1.1 of the project drawings.

1.4 SUBMITTALS

A. Qualifications 1. A Contractor/Constructor Pre-Qualification Submission process is required prior to

bidding as addressed in the Request for Bid.

B. Construction Drawings 1. Provide elevation, plan and sectional view drawings of the foundation, support

structure, tank and all appurtenant equipment and accessories. Show the location, dimensions, material specifications and finish requirements. The submission shall be sealed by professional engineer registered in the State of Texas.

2. Foundation details shall include excavation, soil protection and backfill. 3. Reinforced concrete details shall include construction joints, openings and inserts.

Reinforcement shall be clearly indicated on the structural drawings and identified by



mark numbers that are used on the fabrication schedule. Location, spacing and splice dimensions shall be shown. Placement and fabrication details shall conform to ACI 318.

4. Steel tank details shall include weld joints and a layout showing all primary and secondary shop and field welds.

C. Construction Procedures 1. Provide design, detail drawings and procedures for the support structure forming

system. Details shall include location of form and construction joints, rustications and ties. Procedures shall also include form removal criteria and minimum elapsed time for adjacent concrete placement. Provide documentation of method to seal construction joints and rustications from grout leakage.

2. Provide shop and field weld procedures for all structural joints on the steel tank.

D. Design Data 1. Provide a table showing capacity of the tank in gallons at all levels in one foot

increments. 2. Provide a summary of the design for the foundation, support structure, tank and other

components. Include the design basis, loads and load combinations and results. 3. Provide finite element analysis of the ring beam – see 2.4. 4. Provide finite element analysis of the steel cone – see 2.5.

E. Product Data 1. Provide a separate concrete mix design for each specified concrete compressive

strength indicated on the drawings. 2. Provide technical data and color samples of all coating products. 3. Provide manufacturer’s/constructor’s descriptive information for appurtenant

equipment and accessories that are not detailed on the construction drawings.

F. Reports/Certification 1. Provide documentation of all tests, inspections and certifications required by this

section. 2. Provide qualifications of all welders. 3. Certified Test Reports shall be submitted to the Owner within seven (7) days of the test

being performed. Failure to submit test reports may result in non-payment for those pay items.

4. Subgrade compaction report. 5. Concrete test reports during construction. 6. Tests on hardened concrete. 7. Welding test reports. 8. Settlement monitoring report. 9. Vacuum box testing report.

G. Operation/Maintenance 1. Provide operating instructions and maintenance procedures for the elevated tank and

applicable appurtenant equipment, mechanical components and accessories, above items must comply with specification section 01 33 00 – Submittals.


A. Qualification of Tank Constructor 1. The work described in this section shall be performed by an experienced elevated water

storage tank Tank Constructor that has designed, constructed and commissioned



Composite AWWA D107 elevated storage tanks of the same design described in paragraph 1.3A and constructed using forming systems as specified in 3.2B.

2. Tank Constructors desiring to bid must strictly follow all requirements stipulated in the Pre-Qualification Submission as required prior to bidding and as addressed in the Request for Bid.

3. Elevated tank design, concrete support structure construction and steel tank construction shall not be subcontracted. These items shall be self-performed by the elevated Tank Constructor.

4. The Tank Constructor shall directly employ a full time Texas licensed professional engineer with a minimum 10 years cumulative experience in the design and construction of Composite elevated tanks as described in paragraph 1.3A. The engineer shall be in responsible engineering charge of the work.

5. The Tank Constructor shall directly employ throughout this Project a construction team comprised of construction superintendent, project manager and foreman who each have successfully constructed Composite AWWA D107 elevated storage tanks previously, serving in the same role as that which they will serve on this Project.

6. The Tank Constructor’s qualified construction superintendent and foreman who is directly employed by the Tank Constructor shall be on the Project site at all times during construction of the foundation, support structure and steel tank.

B. Regulatory Requirements 1. The specifications, codes and standards referenced in paragraph 1.2 and all those

applicable to AWWA D107 ESTs shall govern the work with regard to materials, design, construction, inspection and testing to the extent specified.

2. The elevated tank shall be designed and constructed in compliance with applicable federal, state and local regulations.

3. Personnel safety equipment shall be provided in accordance with OSHA requirements and manufacturer’s documentation.

1.6 DELIVERY, STORAGE AND HANDLING

A. Handling and Shipping 1. The Tank Constructor shall handle materials and fabricated components in a manner

that will protect them from damage. Allow painted materials adequate cure time prior to stacking or shipping.

B. Storage and Protection 1. Protect delivered materials and equipment from damage. Store in well drained areas

and provide blocking to minimize contact with the ground.

1.7 PROJECT CONDITIONS

A. Permits and Easements 1. Permits, licenses, and easements required for permanent structures, changes in existing

facilities or advancement of the construction as specified shall be secured and paid for by the Owner prior to the start of construction. These include building permits, airspace authority approval, site access easements, highway crossing permits, etc. a. Contractor to apply and pay for needed electrical permit. b. Contractor to apply for sewer service permit. City will cover cost of this permit.

2. Licenses or permits of a temporary nature required by specific trades shall be the responsibility of the Tank Constructor.



B. Existing Conditions 1. A geotechnical investigation has been carried out at the site and a report has been

incorporated within these specifications. The net allowable bearing pressure of shallow foundations and/or the allowable capacity of deep foundation elements have been defined in this report. The Tank Constructor shall be responsible for securing any further geotechnical information required beyond that provided in this report.

C. Access 1. The Tank Constructor shall provide access from public roads to the tank site unless

otherwise specified.

D. Working Conditions 1. Safety and Health

a. The Tank Constructor shall comply with safe working practices and all health and safety regulations of OSHA, state and local health regulatory agencies and Material Safety Data Sheets (MSDS). Provide protective and lifesaving equipment for persons working at the site.

2. Times for Work a. Times for work shall comply with local, state and federal regulations and laws.

1.8 SEQUENCING AND SCHEDULING

A. Schedule 1. Prior to construction, the Tank Constructor shall provide a bar chart showing the

anticipated schedule for design, submittals, site work and the major components of construction including foundation, support structure and steel tank. In addition, show tank painting, electrical installation and other significant activities. Update the schedule on a monthly basis.

B. Notification 1. The Tank Constructor shall provide notification of the intent to start work at least seven

days prior to commencing each major phase of work.

C. Certifications 1. Provide certification from the engineer of record that the elevated tank has been

designed in accordance with the requirements of the specification. 2. Provide certification that testing and inspection requirements of 3.6 have been

performed and the results comply with the requirements of the specification.

1.9 SINGULAR RESPONSIBILITY

A. It is acknowledged that the successful design and construction of composite elevated storage tanks requires specialized and proprietary knowledge and skills. It is further recognized that successful performance of the tank requires that the earthwork preparation, foundation for the tank and the tank itself be considered an integrated system. Therefore, it is the express intent of this Section to create a singular responsibility for the design and construction of this integrated system required for composite elevated storage tanks. The design and construction of all aspects, including but not limited to, excavation, tank subgrade, fill placement beneath tank, tank foundation, foundation drainage systems, concrete support structure, inlet and outlet pipes, all piping and equipment inside the tank, interior floors and architectural improvements, welded steel tank, and pedestal and welded steel tank finishes



must be performed by the Tank Constructor or his Subcontractor under the direct supervision of the Tank Constructor.

1.10 GUARANTEES

A. The Tank Constructor shall guarantee the structure, appurtenant equipment and accessories provided under this section against defective design, workmanship or materials for a period of one year from the date of substantial completion. If notified within this period, the Tank Constructor shall repair any defects at no cost to the Owner. Defects caused by damaging service conditions are not covered.

B. All guarantees for materials, equipment and accessories provided under this section shall be obtained by the Tank Constructor and submitted.

1.11 INSURANCE

A. In addition to any requirements specified in the General and/or Supplemental Conditions, the following requirements shall apply.

B. General Liability 1. The Tank Constructor shall maintain General Liability and Umbrella insurance with a

minimum combined limit of $5,000,000 each occurrence and aggregate.

C. Professional Liability 1. The Tank Constructor shall maintain Professional Liability insurance with minimum

limit of $2,000,000 each occurrence and aggregate.

1.12 ENGINEERING SUBMITTAL REQUIREMENTS

A. All Tank/Pedestal design drawings and each submittal sheet shall be issued and sealed by a licensed professional engineer in good standing in the State of Texas who will become the Engineer-of-Record for the tank/pedestal integrated system.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Reinforced Concrete 1. Concrete materials and reinforcement shall comply with ACI 318, ACI 371R and AWWA

D107, except as modified in this section.

B. Steel Tank 1. Steel tank components, including steel plates, sheets, structural shapes and filler metals

shall be in accordance with AWWA D107.

2.2 CONCRETE FOUNDATION

A. The concrete foundation shall be designed in accordance with ACI 318. Minimum specified compressive strength shall be 4,500 psi at 28 days. Reinforcing steel shall be ASTM A615 Grade 60. The service load reinforcement tension stress shall not exceed 30,000 psi under dead plus water load unless flexural cracking is otherwise controlled in accordance with ACI 318.



2.3 CONCRETE SUPPORT STRUCTURE

A. The concrete support structure shall be designed in accordance with ACI 318. The specified compressive strength of concrete shall be as required by design, but not less than 4,500 psi at 28 days. The maximum specified compressive strength of concrete for the wall and dome shall be 6000 and 5000 psi respectively.

B. Support Wall 1. Support wall shall be reinforced concrete with a minimum thickness of 12 inches

exclusive of any architectural relief. Wall thickness shall be provided such that the average compressive stress due to the weight of the structure and stored water is limited to 25% of specified compressive strength, but not greater than 1000 psi. A minimum total wall reinforcement of 0.15% vertically and 0.20% horizontally shall be distributed approximately equally to each face. A minimum of 0.75% vertical reinforcement shall be provided in the top 6 ft. of the wall extending into the concrete ring beam. Minimum concrete cover for interior / exterior faces shall be 1-1/2 inches.

C. Tank Floor 1. Tank floor shall be a reinforced concrete dome not less than 8 inches thick. The average

compressive stress due to the weight of the structure and stored water shall not exceed 13% of the specified compressive strength, nor greater than 600 psi. Minimum total reinforcement in orthogonal directions shall be 0.40% distributed approximately equally to each face. Additional reinforcement shall be provided for stress caused by edge restraint effects.

D. Openings 1. The effects of openings in the wall shall be considered in the design. Not less than 60%

of the interrupted reinforcement in each direction shall be placed each side of the opening. Reinforcement shall extend past the opening not less than half the transverse opening dimension.

2. Openings wider than 3 ft. 6 in. shall be subjected to a rigorous analysis taking into account the stress concentrations and diminished lateral support that exist in the vicinity of such openings. Each side of the opening shall be designed as a column in accordance with ACI 318.

3. Openings 8 ft. 0 in. or wider used for vehicle access shall be strengthened against vehicle impact and local buckling by means of an internal buttress located on each side of the opening. The buttress shall consist of a thickened, reinforced concrete wall section that is integrally formed and placed with the support wall. The buttress section shall be not less than 3 ft. 0 in. wide and 6 in. thicker than the nominal wall dimension.

2.4 CONCRETE SUPPORT STRUCTURE / STEEL TANK INTERFACE

A. Interface Region 1. The interface region includes those portions of the concrete support structure and steel

tank affected by the transfer of forces from the tank cone and the tank floor to the concrete support wall. This includes a ring beam and connection details. The Tank Constructor shall provide evidence that a thorough review of the interface region has been performed. Finite element and finite difference analyses are the required methods for examining such local stresses in detail.

2. The geometry of the interface shall provide for positive drainage and not allow either condensate or precipitation to accumulate at the top of the concrete wall or ring beam.



B. Ring Beam 1. The ring beam shall be reinforced concrete with a nominal width and height of at least

two times the support wall thickness. Minimum radial and circumferential reinforcement shall be 0.25% and 1.0%, respectively. For direct tension, reinforcement shall be provided such that the average service load stress in tension reinforcement due to the weight of the structure and stored water does not exceed 12,750 psi.

2. Ring beam design shall consider unbalanced forces from the steel tank cone and concrete dome, load conditions varying with water level, eccentricity of loads resulting from design geometry, and allowance for variations due to construction imperfection and tolerance.

2.5 STEEL TANK

A. General 1. The steel tank shall be all welded construction and shall be designed in accordance with

applicable sections of AWWA D107. The required capacity and dimensions of the tank are noted on the drawings and in this section of the specifications. All lap joints shall be fully seal welded on both sides both above and below the waterline.

B. Fabrication 1. Layout, cutting, forming, edge preparation and workmanship for steel tank components

and fabrications shall be in accordance with AWWA D107.

C. Tank Erection 1. Steel tank erection procedures and general requirements shall be in accordance with

AWWA D107.

D. Tolerances 1. Steel tank tolerances shall be in accordance with the requirements of API 650, Section

5.5. 2. Steel cone shall be constructed to the following tolerance. The deviation from the

theoretical conical surface shall not exceed 0.032 √RT, when measured in the radial direction over length 4 √RT, where R is the radius normal to the plate surface at the point of consideration, and T is the plate thickness.

E. Grouting 1. The interface between the steel tank floor plate and the supporting structural concrete

slab shall be constructed with a minimum 1 inch void. Subsequent to testing, the void shall be filled with a flowable grout mix.

F. Plate Thickness 1. All members shall be designed to safely withstand the maximum stress to which they

may be subjected during erection and operation. The minimum thickness of any steel plate in contact with water shall be 1/4 inch.

G. Roof Support 1. All structural members supporting the roof of the steel tank shall be flat bar or sealed

square tubular sections. I-beams or other sections with horizontal projections may be used if the nominal depth is 10 in. or greater. Support beams shall be seal welded to the underside of the roof plate along the entire length of the beam.

H. Cone



1. For areas of the elevated tank where the water is supported by a steel cone, the Tank Constructor shall submit evidence that the design is based on a finite element shell analysis. The analysis shall include the effects of material and geometric non-linearity and residual stresses. The modeled imperfection shall not be less than 0.04√RT over a length of 4√RT, where R is the radius normal to the plate surface at the point of consideration, and T is the plate thickness. The design shall have a minimum factor of safety of 2.0 against buckling.

2. If the above analysis is not performed, the design shall be based on the use of AWWA D107 to determine the allowable compressive stress.

I. Bottom Liner 1. Liner plates shall be shop fabricated to conform to the shape of the concrete dome. All

liner plate seams shall be lap welded on the topside only with a continuous fillet welds or continuous butt welds with backup bars. The minimum thickness for liner plates shall be 1/4 inch.

2.6 APPURTENANCES AND ACCESSORIES

A. General 1. Accessories shall comply with the minimum requirements of the Specifications, Codes

and Standards listed in 1.2, current applicable safety regulations, and the operating requirements of the structure.

B. Ladder Access 1. Ladders shall be provided from the slab on grade inside the base of the support wall to

the upper walkway platform located below the tank floor. The tank floor manway shall be provided with ladder access from the upper platform. A ladder shall extend from the upper platform, through the access tube interior to the roof. A ladder mounted on the access tube exterior shall be provided for access to the tank interior, extending from the roof manway to the tank floor.

2. Ladders that terminate at platforms or landings shall extend a minimum of 48 in. beyond the platform elevations.

3. Ladders located in the concrete support structure shall be hot-dipped galvanized steel. Tank interior ladders shall be 316 stainless steel and coated in accordance with the tank interior coating system. Access tube ladders shall be carbon steel and coated in accordance with the access tube coating specification.

4. Ladder side rails shall be a minimum 3/8 in. by 2 in. with a 16 in. clear spacing. Rungs shall be minimum 3/4 in. diameter, spaced at 12 in. centers and plug welded into holes drilled in the side rails. Tank interior ladders shall be provided with 1 in. diameter rungs and 1/2 in. x 2 in. side rails and shall be fully seal welded.

5. Ladder shall be secured to the adjacent structure by brackets located at intervals not exceeding 10 ft. Brackets shall be of sufficient length to provide a minimum distance of 7 in. from the center of rung to the nearest permanent object behind the ladder. Ladder brackets located on the access tube exterior shall be reinforced at the access tube shell so that potential ice damage is confined to the ladder and bracket and not the access tube shell.

C. Safe Climbing Device 1. For all fixed ladders, provide 3/8” stainless steel cable climbing safety systems. The

cable safety climb system shall meet all applicable OSHA requirements and ANSI Z359.16 standards. Cable systems shall be center mounted with top and bottom



bracket assemblies attached to the ladder rungs. The top bracket assembly shall telescope beyond the top run of the ladder to allow the user to remain tethered to the safety cable while stepping onto the adjacent platform. Bracket assemblies shall be equipped with shock absorbers, quick-link couplings and lifeline tensioners. Intermediate cable guides shall be designed to provide automatic pass-through of the cable sleeve without requiring the operator to manually move the safety cable sleeve past the cable guide. Automatic pass-through cable sleeves shall be designed to prevent movement along the cable in the event of a fall to properly protect the user from accidental falls or rapid decent down the ladder. All cable terminations shall be equipped with factory thimble swaging. Stainless steel mounting brackets, fasteners and assemblies shall be provided as required for a complete and proper installation. System shall be designed to safely accommodate four works attached to the cable system simultaneously.

2. Six automatic pass-through cable sleeves with integral swivel and carabiner shall be provided that are designed to be operated with the either 5/16” or 3/8” diameter cable. Two harnesses with shock resistant lanyards shall be provided with the system.

D. Rest Platform and Rest Seats 1. One (1) intermediate rest platform and two (2) intermediate swing-out rest seats shall

be provided at equal spacing between the pedestal floor and the upper platform with a maximum 20-foot (±) intervals along the interior pedestal ladder. The platform shall be nominal 3.5 ft. x 10 ft. and complete with handrails, mid rails and toe plates in accordance with OSHA requirements and platform floor shall be grating. Openings shall be provided in the landings in an offset pattern as depicted on the Plans to accommodate the ladder that shall extend through each platform and allow the fall prevention equipment to be reattached at each platform. All platform components shall be galvanized steel and attachment hardware shall be zinc plated.

E. Upper Platform 1. A 4 ft. wide upper walkway platform shall be located at the top of the support wall to

provide access from the support wall ladder to the roof access ladder located on the interior of the access tube and the upper louvered vent on the pedestal wall. The platform shall be provided with handrails, midrails and toe plates in accordance with OSHA requirements. Grating shall be used for the walking surface. All components shall be galvanized steel.

2. A fixed lanyard shall be provided at the platform to provide fall prevention.

F. Support Wall Doors 1. Personnel Door

a. Door frames shall be 16-gauge with concealed reinforcement at hardware locations. Expansion type anchors for existing openings shall be installed near the top, bottom and intermediate point of each jamb to rigidly secure the frame. Doors shall be 1 3/4 in. thick insulated, reinforced, full, flush type with 18-gauge face sheets and concealed reinforcement at hardware locations. All edges shall be finished flush with watertight seams. Shop applied finish for the frame and door shall be baked on rust inhibitive primer. Field finish shall be compatible with the tank exterior. Standard hardware shall be stainless steel and include three 4 1/2 in. by 4 1/2 in. hinges, industrial duty closer and lockset.

b. Quantity and location of personnel door(s) shall be as shown on the drawings.



2. Overhead Vehicle Door a. Door installation shall be on the interior face of the support wall. The door frame

shall be a steel plate fabrication suitably detailed, fastened and reinforced to accept the door. Operation shall be manual with a chain hoist. The curtain shall be formed of 22-gauge steel interlocking slats with end locks and wind locks designed for a wind loading of 20 psf. Torsion springs shall be mounted on a solid torsion rod, which is attached to an exterior mounted spring tension adjustment wheel. A 24-gauge steel hood shall be provided with a weather seal to protect the assembly. Steel brackets shall be installed to the interior face of the wall with expansion anchors which enclose and support the counterbalance assembly with sealed bearings. Steel curtain guides are mounted to the brackets. The curtain, bottom bar, brackets, guides, hood, pipe and chain shall be galvanized. Provide with locking device,