Exhibit_B_Coating_Specifications_(Revised).pdf

Clarifier #4 Rehabilitation August 21, 2025

St. Petersburg NWWRF

7500 26th Ave North, St. Petersburg, FL 33710

HIGH PERFORMANCE COATINGS Section 09 96 00 - 1

SECTION 09 96 00 – HIGH PERFORMANCE COATINGS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Not used.

1.2 SUMMARY

A. Provide all labor, materials, apparatus, scaffolding, and all appurtenant work in connection with painting and protective coatings, complete as indicated, specified and required.

B. Principal items to be coated per PART 3 of this document include, but are not limited to:

1. Clarifier Interior Concrete, excluding the floors

C. In addition to the application of coatings, the following procedures are to be performed:

1. Not used.

D. It is the Contractor’s responsibility to examine areas and conditions under which coating systems are to be applied, and to notify the Owner of areas or conditions which are not acceptable. Do not begin surface preparation or application until areas or conditions have been corrected.

1.3 DEFINITIONS

A. Owner – City of St. Petersburg, or their appointed representative.

B. Specifier – City of St. Petersburg, or their appointed representative.

C. Contractor – Selected contractor who is awarded the project.

D. Manufacturer – Coating manufacturer or manufacturer’s authorized representative:

1. Basis of Specification: Tnemec Company, Inc., represented by Florida Protective Coatings

Services, Inc.

E. DFT – Dry film thickness

F. Mils – All listed mils are dry film thicknesses.

G. Paint and Coating – The words “Paint” and Coating” may be used interchangeably within this document to refer to paints and high-performance coatings.

1.4 ACTION SUBMITTALS

A. All submittals must comply with Owner-specified submittal procedures.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 2

B. Product Data Sheets.

1. Contractor shall submit coating material manufacturer’s printed technical data sheets for products intended for use in each coating system.

2. Data sheets shall fully describe material as to its intended use, generic description, recommended surface preparation and application conditions, primers, material mixing and application (including recommended dry mil thickness recoat time), precautions, safety and maintenance cleaning directions.

C. Safety Data Sheets. Safety Data Sheets (SDS) shall accompany all submittals and shall be easily available for access at the job site during all activities.

D. Project references as outlined in Article 1.6.

E. Copy of any required certificates, to demonstrate compliance with Article 1.6.

F. Coating Schedule: Cross-reference to paint system and locations of application areas. Use same designations indicated on Drawings and in schedules. Include color designations.

1.5 ONE MANUFACTURER

A. All coatings shall be the product of one manufacturer as specified in this document.

1.6 QUALITY ASSURANCE

A. Third party Inspection:

1. Owner reserves the right to utilize third-party inspection services on this project.

2. If utilized, initial third-party inspection services shall be provided at no additional cost to the Contractor.

B. Guarantee

1. A one (1) year guarantee against failure which commences on the date of final completion shall be provided for all coatings, unless more stringent requirements are specified hereinafter. Failure of any coating during the guarantee period shall be repaired by the

Contractor who shall absorb all costs related to the repair of the coating. Failure shall be defined as peeling, blistering, delamination or loss of adhesion of any of the coatings.

C. Manufacturer’s Qualifications:

1. Specialize in manufacture of high-performance coatings with a minimum of 100 years successful experience.

2. Able to demonstrate successful performance on comparable projects.

3. Single-Source Responsibility: All coatings shall be products of a single manufacturer.

D. Manufacturer’s Representative:

1. The Contractor shall require the manufacturer to furnish a manufacturer’s qualified technical representative to visit the project site for technical support as required and ordered and as may be necessary to resolve field questions or problems attributable to or associated with the manufacturer's products furnished under this Contract or the application thereof.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 3

E. Applicator’s Qualifications:

1. Applicator must have a minimum AMPP Basic Certified Inspector (Level 1) on staff for no less than 6 months. If this requirement is not met, then a Senior Certified Coatings

Inspector (AMPP Level 3) shall be hired at the expense of the applicator and present full-time during all sandblasting and coating application.

2. Experience in application of specified coatings for a minimum of 5 years on projects of similar size and complexity to this work.

3. Applicator must comply with all relevant OSHA safety regulations.

4. Use best practices to carry out corrosion prevention activities in the field.

5. Use best practices in environmental protection to prevent environmental degradation, and to ensure careful handling of all hazardous materials.

6. The Contractor must submit, with their bid, a letter of recommendation from the basis of design product manufacturer. This letter shall confirm that the Contractor’s ability to apply the specified coatings.

7. The Contractor must submit, with their bid, a list of a minimum 5 completed projects of similar size and complexity to this work. Include for each project:

a. Project name & location

b. Name and contact of owner

c. Name and contact of specifier

d. Approximate area of coatings applied

e. Total project amount value

f. Date of completion

F. Pre-Application Meeting:

1. A pre-application meeting shall be held at least two (2) weeks before the start of application of coating systems. All parties who directly affect the project shall attend, including the

Contractor, Manufacturer, and Owner.

2. The pre-application meeting shall include a review of any circumstances which may impact the project including, but not limited to, the following:

a. Environmental requirements

b. Protection of Surfaces not scheduled to be coated

c. Surface Preparation

d. Ventilation

e. Application

f. Cleaning

g. Disinfection

h. Repair

i. Field Quality Control

j. Protection of coating systems

k. 11-month walkthrough

l. Coordination of other projects

G. 11-Month Walkthrough:

1. The Owner shall organize a project meeting for 11 months after the final completion date which the Contractor, Manufacturer, and Owner shall attend. Participants will perform a walkthrough of the project and resolve any workmanship or materials discrepancies.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 4

1.7 DELIVERY, STORAGE, AND HANDLING

A. All coatings shall be delivered to the mixing room in unbroken containers, bearing the manufacturer's brand, date of manufacture, and name. They shall be used without alteration and mixed, thinned, and applied in strict accordance with manufacturer's directions for the applicable materials and surface before using.

B. Coatings shall be delivered to the job site in the original unopened containers, bearing the manufacturer's label. A Product Data Sheet and Safety Data Sheets for all coatings shall be obtained from the manufacturer for each shipment of materials to the job site. Coatings shall be stored in a dry, well-ventilated area, not in direct contact with the ground, where the temperature is maintained within the manufacturer’s written recommended limits.

C. Damaged materials and/or materials exceeding the shelf life shall not be used.

D. The Contractor will be responsible for storing coatings onsite in accordance with the

Manufacturer’s latest written recommendations.

E. Coatings shall be mixed in proper containers of adequate capacity. All coatings shall be mixed in accordance with the Manufacturer’s latest written recommendations. No unauthorized thinners or other materials shall be added to any coatings. Air shall not be used directly for agitation.

Pigmented material shall be strained after mixing. Catalyzed materials may not be used beyond the recommended pot life.

F. Work areas will be designated by the Owner for storage and mixing of all materials. Materials shall be in full compliance with the requirements of pertinent codes and fire regulations. Proper containers outside of the buildings shall be provided and used for wastes, and no plumbing fixture shall be used for this purpose.

G. Contractor will be responsible for disposal of all waste, empty containers, etc.

H. All recommendations of the Manufacturer in regard to the health and safety of workmen shall be followed.

1.8 FIELD CONDITIONS

A. All coatings shall be applied in dry and dust-free environment.

B. No coating shall be applied when temperatures are outside the manufacturers written recommended limits.

C. No coating shall be applied to wet or damp surfaces, and shall not be applied in rain, fog, or mist.

D. No coating shall be applied when the temperature is less than 5°F above the dew point.

E. No coating shall be applied when unsuitable environmental conditions are expected within 1 hour of the listed “Dry to Touch” time for a coating.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 5

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Coatings shall be a product of Tnemec, or Specifier Approved Equal. Tnemec coatings are listed as a quality standard. Alternate coatings of other manufacturers may be approved by the

Specifier, provided they are equal or better.

1. Local Tnemec Contact: Chad Holmes (727) 201-6706, cholmes@tnemec.com

B. To allow time for Specifier and Owner review, all requests for substitution shall be submitted by the coating manufacturer a minimum of 10 days prior to the project bid date.

2.2 PROTECTIVE COATINGS, GENERAL

A. The specified basis of design is intended to provide the longest service life possible, lowest life cycle cost and most sustainable solution. Contractors must provide pricing based on the basis of design. If submitting alternate products, this must be shown in the Bid Schedule as an ADD or

DEDUCT to the overall Base Bid, so the Owner can decide which coating system to accept.

B. Potential alternate products must include side-by-side comparisons of equality including generic coating description, volume solids, ASTM performance test results, etc.

C. Substitutions which decrease the total film thickness, change the generic type of coating, or fail to meet the performance criteria of the specified materials shall not be approved.

D. All coatings shall be furnished by the same manufacturer.

E. Coatings shall be sealed in containers that plainly show the designated name, formula or specification number, batch number, color, date of manufacture, manufacturer's directions, and name of manufacturer, all of which shall be plainly legible at the time of use.

F. All coatings shall be produced and applied as herein called for or, if not specifically called for, it shall be applied in accordance with the manufacturer's latest printed recommendations as approved by the Specifier.

G. Coating materials shall meet Volatile Organic Compounds (VOC) requirements of not more than

3.5 lbs/gal after thinning.

H. No coatings containing lead will be allowed.

I. Material Compatibility:

1. Materials for use within each paint system shall be compatible with one another and substrates indicated, under conditions of service and application as demonstrated by manufacturer, based on testing and field experience.

2. For each coat in a paint system, products shall be recommended in writing by topcoat manufacturers for use in paint system and on substrate indicated.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 6

J. Colors: All colors and shades of colors of all coats of material shall be as identified in the color schedule. Each coat shall be of a slightly different shade, as directed by the Manufacturer to facilitate inspection of surface coverage of each coat.

2.3 SOURCE QUALITY CONTROL

A. Testing of Coatings: Owner reserves the right to invoke the following procedure:

1. Owner will engage the services of a qualified testing agency to sample coatings. Contractor will be notified in advance and may be present when samples are taken. If coatings have already been delivered to project site, samples may be taken at project site. Samples will be identified, sealed, and certified by testing agency.

2. Testing agency will perform tests for compliance with product requirements.

3. Owner may direct Contractor to stop applying coatings if test results show materials being used do not comply with product requirements. Contractor shall remove noncomplying coatings from project site, pay for testing, and repaint surfaces that were coated with rejected materials.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Proceed with coating application only after unsatisfactory conditions have been corrected.

1. Application of coating indicates acceptance of surfaces and conditions.

B. The Contractor shall conduct wet film thickness measurements and shall recoat and repair as necessary for compliance with the specifications.

C. Coating thickness shall be determined by the use of a properly calibrated "Nordson-Mikrotest" or

"Positest" Coating Thickness Gauge (or equal) for metal. Note that a “Tooke” gauge may also be used if necessary, and that use of the "Tooke" gauge is classified as a destructive test.

D. Before performing any destructive tests on a newly applied coating system, the Owner and

Contractor shall determine which of them is responsible for the cost of repairing the damaged coatings.

E. Coatings not in compliance with the specifications will not be acceptable and shall be corrected and re-inspected at Contractor’s expense until the specifications are met.

F. After each coat has been allowed to dry, the dry film thickness will be measured and recorded in the daily inspection reports. The Contractor shall not apply a successive coat until the dry film thickness of the preceding coat or coats has been approved by the Owner.

G. Measurement of dry film thickness over steel surfaces will be done in accordance with SSPC-PA

2.

H. Measurement of dry film thickness over concrete surfaces may be estimated by comparison of the used material to the theoretical coverage rate.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 7

I. Holiday Testing:

1. Not Used.

3.2 PREPARATION

A. Remove hardware, covers, plates, and similar items already in place that are removable and are not to be painted. If removal is impractical or impossible because of size or weight of item, provide surface-applied protection before surface preparation and painting.

1. After completing painting operations, use workers skilled in the trades involved to reinstall items that were removed. Remove surface-applied protection.

B. General (ALL Surfaces):

1. All surfaces are to receive the following surface preparation prior to any other specified surface preparations in the remainder of Article 3.2.

2. The Contractor shall examine all surfaces to be coated, and shall correct all surface defects before application of any coatings. Any required removal, repair, or replacement of this work caused by unsuitable conditions shall be done at no additional cost to the Owner.

3. All weld seams, sharp protrusions and edges shall be ground smooth prior to the surface preparation or application of any coatings.

4. Remove all loose existing coatings, dirt, dust, grease, oil, mold, mildew, salts, and other soluble contaminants by High Pressure Water Cleaning (using potable water, 3500 - 5000 psi, 3-5 gallons / minute, oscillating tip). A degreaser may be required for oil-soaked areas or heavily contaminated areas.

5. Neutralize and remove all mold & mildew using a solution made by adding two (2) ounces of tri-sodium phosphate and eight (8) ounces of sodium hypochlorite to one (1) gallon warm water. Use a scouring powder, if necessary, to remove mildew spores, and then perform a final rinse with potable water.

6. Spall repairs: Repair spalls in accordance with ICRI Guideline No.310.1R. Areas to be repaired are to be prepared in accordance with SSPC-SP13/NACE No.6 with a minimum surface profile of ICRI-CSP5. Series N218 shall be used for shallow concrete repairs. For deeper repairs, Series 217 may be used. Exposed steel rebar is to be prepared in accordance with SSPC-SP10/NACE No.2, and primed the same day using Tnemec Series 1 @ 2.5 –

3.5 mils DFT.

7. All surfaces must be clean, dry, and free of contaminants prior to the application of any coatings.

8. All prepared surfaces must be coated as soon as possible in order to prevent re-contamination of the substrate. Areas which are re-contaminated must be re-cleaned to the proper level of cleanliness prior to application of coatings. If necessary, this may also involve re-sandblasting, which will be performed at no additional cost to the Owner.

C. Interior Concrete or Other Cementitious Substrates:

1. Prepare all surfaces in accordance with Article 3.2.B.

2. Abrasive blast or mechanically abrade in accordance with SSPC-SP13 to remove all existing coatings & contaminants, and to provide a minimum ICRI-CSP5 profile.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 8

3.3 COATING SCHEDULE

A. Concrete or Cementitious Substrates (Clarifier Interior)

1. Surfacer / Patcher: Apply Tnemec Series N218 to all vertical surfaces at a nominal 1/8” and as needed to bring all surfaces (vertical and horizontal) to level. Series N218 is to re-surface concrete, fill voids and bugholes, mitigate concrete outgassing, and to create a monolithic, paintable surface.

2. One or Two Passes: Series 142 Epoxoline @ 16.0 - 20.0 mils, applied in one or two passes

(Where possible, spray & backroll first pass into the substrate).

3. 2nd Coat (UV-Exposed Areas, Extending down 1’ below the Water Line): Series 1094 @

3.0 – 5.0 mils.

3.4 COLOR SCHEDULE

A. Colors are TBD at this time.

3.5 APPLICATION

A. Apply all paints and coatings in accordance with the Manufacturer's latest written instructions and recommendations.

1. Use applicators and techniques suited for coatings and substrate indicated.

2. Paint surfaces behind movable items same as similar exposed surfaces. Before final installation of new or removed permanently fixed items, coat surfaces behind these items.

3. Do not paint over labels of independent testing agencies or equipment name, identification, performance rating, or nomenclature plates.

B. Each coat must be tinted a different shade to facilitate identification of each coat when multiple coats are required. Provide sufficient difference in shade of undercoats to distinguish each separate coat.

C. If undercoats or other conditions show through topcoat, apply additional coats until cured film has a uniform finish, color, and appearance.

D. Apply coatings to produce surface films without cloudiness, spotting, holidays, laps, brush marks, roller tracking, runs, sags, ropiness, or other surface imperfections. Cut in sharp lines and color breaks.

E. Sufficient time shall be allowed to elapse between successive coats to permit satisfactory recoating but, once commenced, the entire coating operation shall be completed without delay.

Contractor is responsible for compliance with the Manufacturer’s listed minimum and maximum recoat windows.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 9

3.6 FIELD QUALITY CONTROL

A. The Contractor shall regularly conduct wet film thickness measurements and shall recoat and repair as necessary for compliance with the specifications.

B. On metal substrates, coating thickness shall be determined by the use of a properly calibrated

"Nordson-Mikrotest" or "Positest" Coating Thickness Gauge (or equal). Please note that a

“Tooke” gauge may be used on cementitious surfaces, and that use of the "Tooke" gauge is classified as a destructive test.

C. Before performing any destructive tests on a newly applied coating system, the Owner and

Contractor shall determine which of them is responsible for the cost of repairing the damaged coatings.

D. Coatings not in compliance with the specifications will not be acceptable and shall be replaced and re-inspected at Contractor’s expense until the specifications are met.

3.7 COATING PERFORMANCE CRITERIA

A. The following shall serve as a basis of comparison for material substitution requests. Any substitutions which decrease the total film thickness, change the generic type of coating, or fail to meet the performance criteria of the specified materials shall not be approved.

1. Series 142 Epoxoline – Modified Polyamine Epoxy:

a. Abrasion: ASTM D4060 - No more than 59.3 mg loss after 1,000 cycles, average of two tests.

b. Adhesion: ASTM D4541 - No less than 2,042 psi (14.08 MPa) pull, average of three tests.

c. Cyclic Salt Fog / UV Exposure: ASTM D5894 – No blistering, cracking, rusting or delamination of the film and less than 1/16 inch creepage at the scribe after 5,000 hours exposure.

d. Prohesion: ASTM G85 – No blistering, cracking, rusting or delamination of film and less than 1/16 inch creepage at the scribe after 5,000 hours exposure.

e. Salt Spray (Fog): ASTM B117 - No blistering, cracking, rusting or delamination of film and less than 1/32 inch creepage at the scribe after 5,000 hours exposure.

2. Series N218 Mortarclad – Epoxy Modified Cementitious Mortar:

a. Special Qualification: Able to be applied up to 1” in a single lift on a flat, prepared vertical surface.

b. VOC Content: 0.0 lbs/gallon

c. Adhesion: ASTM C1583 – Exceeds the cohesive strength of concrete substrate

(~400 psi), average of three trials.

d. Bond Strength: ASTM C882 – No less than 2,040 psi (14.1 MPa) bond strength by slant shear, average of three tests.

e. Compressive Strength: ASTM C579 – No less than 5,927 psi (40.86 MPa) compressive strength, average of three tests.

f. Drying Shrinkage: ASTM C596 – No more than 13.2 x 10-4 inches drying shrinkage, average of four tests.

HIGH PERFORMANCE COATINGS Section 09 96 00 - 10

g. Freeze-Thaw: ASTM C666 – No more than 0.021% length change and no more than

0.04% weight gain and no less than a 95% relative dynamic modulus after 300 cycles of rapid freezing and thawing, average of three samples.

h. Shrinkage: ASTM C531 – No more than 0.105% linear shrinkage, average of five trials.

i. Splitting Tensile Strength: ASTM C496 – No less than 462 psi (3.18 MPa) splitting tensile strength, average of three tests.

j. Thermal Expansion: ASTM C531 – No more than 3.22 x 10-06 linear coefficient of thermal expansion per °F, average of five trials.

3. Series 1094 Endura-Shield – Aliphatic Acrylic Polyurethane:

a. Volatile Organic Compounds (Thinned 15%): 0.80 lbs/gallon (96 grams/litre)

b. Cyclic Salt Fog / UV Exposure: ASTM D5894 – No blistering, cracking, rusting or delamination of film after 5,000 hours (15 cycles) of cyclic salt fog/UV cycling.

c. Hardness: ASTM D3363 – No less than 3B scratch hardness after 30 days cure.

d. Prohesion: ASTM G85 – No blistering, cracking, rusting or delamination of film and no rust creepage at the scribe after 3,000 hours of exposure.

e. QUV Exposure: ASTM D4587 (UVA-340 bulbs, 8 hours UV, 4 hours condensation) - No blistering, cracking or delamination of film. No less than 80% gloss retention, no more than 16 units gloss loss and no more than 1.89

DECIE2000 color change after 4,000 hours QUV exposure.

3.8 CLEANING AND PROTECTION

A. Upon completion of the work, staging, scaffolding, drop-cloths, and containers shall be removed from the site or destroyed in an approved manner. Paint spots, oil, or stains upon adjacent surfaces shall be removed.

END OF SECTION 09 96 00