ESBD_365359_1722007239521_RFB 2024-056 Addendum No. 2.pdf

Purchasing Services Post Office Box 2570

Waco, Texas 76702-2570 Phone: 254-750-8098

Fax: 254-750-8063 melaniew@wacotx.gov

CITY OF WACO www.waco-texas.com

Date: 07/26/2024

RFB No: 2024-056 Commodity: Gholson Ground Storage Tank (GST) Purchasing Agent: Melanie Wade

Closing Time: 2:00 P.M. CT, Thursday, August 1, 2024 Opening Time: 2:01 P.M. CT, Thursday, August 1, 2024

RFB Opening Location: Via Zoom and Dial In

Addendum No: 2

1. Questions answered.

2. New pricing sheet labeled “Official Bid Sheet (Addendum 2)”. This replaces original pricing sheet.

3. New technical specifications. These replace technical specifications in the bid package.

4. Roof pictures and overflow flat valve picture.

The above-mentioned RFB invitation has been changed in the following manner. Sign and return addendum to the Purchasing Office by the closing time and date with your RFP 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.

Firm:

Address

Signature of Person Authorized to Sign Bid:

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

E-mail Address:

Date: Telephone: Fax:

mailto:melaniew@wacotx.gov http://www.waco-texas.com/

Questions RFB 2024-056 Gholson Ground Storage Tank (GST) Coating Project

1. Is this an abrasive blast job or high pressure wash??

High Pressure Wash for Concrete and Steel Surfaces. Abrasive Blasting may be required in select areas to remove all rust and other contaminants.

2. Will a containment be required??

Contractor shall be responsible for any dust, debris and/or paint droplets which leave City property and/or cause damage to neighboring property. Insufficient containment of abrasive debris and/or generation of nuisance dust or paint beyond City property limits is just cause for shutdown of the job until proper protective measures are in place and violations have been remedied. Contractor shall be responsible for the removal and disposal of all debris.

3. Will Sherwin Williams products be acceptable?

No

4. Pre-Construction photos (if required) is in the procurement packet; however, it does not state if photographs are or are not required. Can you please clarify if the service is required.

Yes.

5. DOES THE CONTAINMENT REQUIRE FOR THIS PROJECT?

See question 2.

6. WHO IS THE INSPECTOR/ENGINEER FOR THIS PROJECT?

Either the City of Waco, or its representatives.

7. WHAT’S THE INTERIOR WET SCOPE OF WORK?

None, Only Exterior work.

8. PLEASE CONFIRM THE EXTERIOR COATING IS SURFACE REPAIR, POWER WASH AND 3

COAT OF TNEMEC 156?

See SPECIFICATIONS COATING & PAINTING for CONCRTE GROUND STORAGE TANKS, section 2.04 EXTERIOR COATING SCHEDULE

9. IS THERE ANY REPAIRS ITEMS?

No. But if pressure washing/blasting causes any holes, pits, or voids to emerge, contractor to fill with Tnemec 218 Mortar Clad.

10. PLEASE VERIFY THE WORKING HOURS ARE FROM M – F 7AM – 6PM? WEEKEND WITH

REQUEST AND ADDITIONAL FEES CHARGE TO CONTRACTOR?

Working hours are from 7AM-6PM Monday thru Friday.

If the Contractor wants to perform work outside of normal hours, or on Saturdays, Sundays, or City holidays, the Contractor shall seek approval by making a written request to City at least 48 hours in advance. The contractor shall be responsible for all City staff and third-party time, costs, expenses, and overtime for work performed on Saturdays, Sundays, or City holidays, unless excused in writing by the City prior to the work.

If there is no inspectable work to be done over the weekend requiring city or third-party staff to be onsite, then no additional fees should be charged to the contractor.

11. WHEN IS THE START DATE FOR THIS?

After getting a fully executed contract, and having a preconstruction meeting, then the Notice to proceed will be issued. Approximately October 2024.

12. Are restrooms available on site?

No, there are no functional restrooms on site available. The nearest convenience store is ½ mile from location. Contractor is recommended to provide necessary accommodations.

13. Is weekend work allowed?

See question 10.

14. Will Sherwin Williams Products be an acceptable coatings supplier?

See question 3.

15. There is no mention of the City Logo being installed. Should we include and will there be a spec for it?

Contractor to completely paint over existing city logos. The city no longer wants any logos on this tank.

16. What is the maximum allowable working hours per day in a week, Sunday - Saturday?

See Question 10.

17. At the pre-bid, there was talk about repainting the logo. Was a decision made here? If so will the logo be identical in design & dimensions to the existing logo on the tank?

See question 15.

18. Would soft washing with a chemical solution to prepare the tanks for before painting be acceptable?

Any chemical solution washing must meet the SSPC-SP13 (Surface Preparation of Concrete) requirements and/or SPECIFICATIONS COATING & PAINTING for CONCRTE GROUND STORAGE TANKS, section 2.04 EXTERIOR COATING SCHEDULE, A. Exterior Concrete, Number 2.

19. Can you confirm if the surface prep & coating required for the above project is Abrasive Blasting plus coating of the exterior or Pressure Washing plus coating of the exterior?

See Question 1.

20. Is reapplying the logo part of SOW?

No. See question 15.

21. The exposed durometer pad at the bottom of the exterior tank walls is in bad shape and crumbling and will most likely break even more when abrasive blasting and/or pressure washing. Should we remove and replace this? What to replace with? Mortar, grout, sealant?

Contractor to protect durometer pad where possible, Repair work to be completed at a later date.

22. Are the metal rust fixtures included?

Only the overflow flap valve. Contractor to not paint over any stainless steel.

23. Crack Repair included?

No.

24. Is there water available on-site for pressure washing, and can the contractor use it?

Yes.

25. Neighboring Concrete company debris?

It is the responsibility of the contractor to coordinate all work activities, if necessary, with any neighboring businesses to ensure the coating is applied as specified.

CITY OF WACO

OFFICIAL BID SHEET (ADDENDUM 2)

BID INVITATION NO: RFB 2024-056

Gholson Ground Storage Tank (GST) Coating Project

DATE: ________________

VENDOR:__________________________________________________________________

AUTHORIZED SIGNATURE: _______________________________________________

I. Refer to "Standard Instructions for all Bids" before completing Bid Sheet.

a. Price: quote your best price, F.O.B. Destination, on each item.

II. In submitting this bid, I certify:

a. Items bid are in exact accordance with specifications, unless noted in bid.

b. That prices in this bid have been arrived at independently, without consultation or agreement with any competitor for the purpose of restricting competition.

PRICING INFORMATION

NOTE: Depending on unit prices, requirements and approved budgeted funds, quantities may be reduced or increased during the contract period.

Item No.

Description Quantity

(A) Unit Unit Cost

(B) Subtotal Price

(A x B) = C

1.0

Mobilization (Site preparation, including but not limited to:

security, signage, notifications, construction facilities, necessary permits, and drip and drift protection)

1 LS

2.0

Tank Preparation (Tank surface preparation including but not limited to: prepare tank surface in accordance with technical specification and coatings manufacturer, prepare site for paint application)

1 LS

3.0

Rust Repair where required and pre-approved per engineer (Mechanically clean the concrete, apply MFR compatible primer)

10 SF

4.0 Recoat Entire Tank, including all painted metals, does not include free standing fill pipe (Install coating system per technical specification)

1 LS

5.0 Clean and recoat overflow flat valve per technical specification

1 LS

6.0 Contingencies (to be used only at the discretion of the Water Utilities Department)

TBD TBD $15,000

Total Price $

Early Payment Terms:

II. Bidder may offer an early payment discount by filling in the blanks in section b below.

City may accept an early payment discount, but in doing so, City does not waive any of its rights under Texas Government Code Section 2251 (Prompt Payment Act).

III. Payment is due thirty (30) DAYS after acceptance of order and receipt of an original invoice, but a______ percent early payment discount is offered for full payment made within ____(__) DAYS after acceptance of order and receipt of an original invoice.

(1) COMPLETED FORM MUST BE RETURNED WITH BID

Concrete Tank Rehab – Waco 09800-1

SPECIFICATIONS

COATING & PAINTING

for

CONCRETE GROUND STORAGE TANKS

PART 1 - GENERAL

1.01 SCOPE

A. This item includes:

a. High-Pressure wash exterior surfaces of dome, dome ring, and tank wall to remove all foreign matter, dust, dirt, laitance or other surface contaminants; and apply exterior coating system to the exposed exterior tank wall and dome compatible with the original tank design.

b. High-Pressure wash exterior surface of steel, removing rust, and all foreign matter, dust, dirt, laitance or other surface contaminants, and apply exterior coating system.

c. Special care should be taken on the exterior wall to avoid spalling or damaging the external shotcrete or underlying prestress wires.

The work of this section includes the coating of all exterior surfaces.

1.02 RELATED WORK SPECIFIED ELSEWHERE (Not Applicable)

1.03 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 SSPC (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)

ASTM D 520 Standard Specification for Zinc Dust Pigment ASTM D 4417 Standard Test Methods for Field Measurement of Surface

Profile of Blast Cleaned Steel ASTM E 337 Standard Practice Test Method for Measuring Humidity with a Psychrometer ASTM D2200 Standard Methods of Evaluating Degree of Rusting on

Painted Surfaces ASTM D6386 Standard Practice for Preparation of Zinc (Hot-Dip

Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Painting

2. ANSI (American National Standards Institute)

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

ANSI/NSF Standard 61 Drinking Water Components

3. AWWA (American Water Works Association)

Concrete Tank Rehab – Waco 09800-2

AWWA D 102 Coating Steel Water Storage Tanks

4. Consumer Product Safety Act, Part 1303

5. ICRI (International Concrete Restoration Institute) Technical Guideline No. 310.2-1997 Selecting and Specifying Concrete

Surface Preparation for Sealers, Coatings, and Polymer Overlays

6. NACE International

NACE Publication TPC2 Coatings and Linings for Immersion Service:

Chapter 1 Safety, Chapter Surface Preparation, Chapter 3 Curing, and Chapter 4 Inspection

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

NACE Standard SP0188 Standard Recommended Practice – Discontinuity (Holiday) Testing of Protective Coatings

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

NACE Standard RP0288 Standard Recommended Practice, Inspection of Linings on Steel and Concrete

7. OSHA (Occupational Safety & Health Administration)

1915.35 Standards – 29 CFR – Painting

8. SSPC (Society for Protective Coatings) SSPC-SP2 Hand Tool Cleaning SSPC-SP3 Power Tool Cleaning SSPC-SP11 Power Tool Cleaning to Bare Metal SSPC-SP13 Surface Preparation of Concrete SSPC-PA-1 Shop, Field and Maintenance Painting SSPC-PA-2 Measurement of Dry Film Thickness with Magnetic Gages SSPC-PA-3 Guide to Safety in Paint Application SSPC-Guide 12 Guide for Illumination of Industrial Painting Project SSPC-VIS 1-89 Pictorial Surface Preparation Standards for Painting Steel

Surfaces SSPC Paint Spec 36 Two Component Weatherable Aliphatic Polyurethane

Topcoat, Performance-Based

9. SSPC/NACE Joint Standards SSPC-SP5/NACE 1 White Metal Blast Cleaning SSPC-SP6/NACE 3 Commercial Blast Cleaning SSPC-SP7/NACE 4 Brush-Off Blast Cleaning SSPC-SP10/NACE 2 Near-White Metal Blast Cleaning SSPC-SP13/NACE 6 Surface Preparation of Concrete

10. NAPF (National Association of Pipe Fabricators) NAPF 500-03-01 Solvent Cleaning NAPF 500-03-04 Abrasive Blast Cleaning for Ductile Iron Pipe NAPF 500-03-05 Abrasive Blast Cleaning for Cast Ductile Iron Fittings

Concrete Tank Rehab – Waco 09800-3

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

1.04 CONTRACTOR

A. The Contractor shall have three years’ practical experience and successful history in the application of specialized coatings to the surfaces of concrete water tanks of similar size and complexity. Upon request, he shall substantiate this requirement by furnishing a list of completed projects including project name and location, name of engineer or Owner with contact information, name of coating manufacturer and approximate quantity of coating applied.

B. The Contractor shall submit with his 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 Contractor shall employ personnel trained for the application of high-performance coating and 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”.

1.05 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. Steel Surface Preparation: Surface preparation will be based upon comparison with:

"Pictorial Surface Preparation Standards for Painting Steel Surfaces: SSPC-VIS 1-89”, ASTM Designation D2200-95, "Pictorial Surface Preparation Standards for Painting Steel Surfaces”, ASTM D 4417-91, Method A and/or Method C “Field Measurement of Surface Profile of Blast Cleaned Steel” or NACE Standard RP0287-87 “Field Measurement of Surface Profile of Abrasive Blast Cleaned Steel Surfaces Using a Replica Tape". Surface preparation of concrete will be based on comparison with ICRI Technical Guideline 310.2-1997 comparators in conjunction with SSCP-SP13. In all cases the written standard shall take precedence over the visual standard. In addition, NACE Standard SP0178, “Fabrication Details, Surface Finish Requirements, and Proper Design Considerations for Tanks and Vessels to be Lined for Immersion Service”, along with the Visual Comparator, shall be used to verify the surface preparation of welds.

C. 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 5F 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. Methods for attaching temporary covers over openings in the

Concrete Tank Rehab – Waco 09800-4 reservoir shall be submitted at the pre-construction meeting or prior to any work beginning on the tank.

D. 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.

E. Holiday (Pinhole) Testing: The integrity of coated surfaces scheduled for immersion shall be tested for holidays in accordance with NACE Standard SP0188. 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.

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.

F. 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.

G. Inspection: Inspection for this project shall consist of ‘hold point’ inspections. The

Engineer or his 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 his representative shall be able to conduct the required inspections.

H. 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.

1.06 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.

Concrete Tank Rehab – Waco 09800-5

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 halfmask 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 inspector.

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.

1.07 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. Materials shall be subject to random inspection by the Owner’s Representative at the job site. Do not paint over code-required labels, such as Underwriters’ Laboratories and Factory Mutual, or equipment identification, performance rating, name or nomenclature plates.

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.

1.08 JOB CONDITIONS

PART 2 - MATERIALS

2.01 ACCEPTABLE MANUFACTURERS

A. To ensure coating compatibility, Contractor shall use products of a single Coating Manufacturer for all coating applied to the tank or its components, unless prior approvals are obtained in writing from the Owner and the Coating Manufacturer.

B. 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

Concrete Tank Rehab – Waco 09800-6 of other 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.

C. 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 projects shall be submitted in which each product has been used and rendered satisfactory service.

D. All requests for product substitution shall be made at least 10 days prior to the bid date.

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

2.02 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 D520 Type III as regards zinc content and purity.

C. All materials for the interior wetted portion of raw and treated water tanks and other equipment shall meet the requirements of ANSI/NSF Standard 61 for potable water contact.

D. No coatings shall contain Methylene Dianiline (MDA). All coatings, including all colors, shall be lead-free.

2.03 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.

2.04 EXTERIOR COATING SCHEDULE: The number of coats called for in this schedule shall be considered minimum. If more coats are required for complete coverage and uniform appearance, they shall be applied. Colors will be selected by the Owner from standard manufacturer's color samples (tank color is anticipated to be similar to a “desert tan” color). The Contractor shall submit current charts of the manufacturer's available colors to the Engineer for approval prior to the start of coating and painting.

A. Exterior Concrete

1. Surface Preparation: Pressure wash all surfaces to be coated using a solution of hot water and detergent at a minimum of 3500 psi and a minimum flow rate of 3.0 gallons per minute to remove all oil, grease, chalk, dust, dirt and other contaminants.

Concrete Tank Rehab – Waco 09800-7

2. After completion of high-pressure wash, low-pressure wash exterior surface as required with a 5% chlorine solution and thoroughly rinse with clean water to kill any algae, fungus, mildew or other surface contaminants. Remove any efflorescence deposits from the tank wall. Any runoff water will need to be de-chlorinated or captured.

2. Coating System:

First Coat: Tnemec Series 151 Elasto-Grip FC applied at 200 square feet per gallon.

Second Coat: Tnemec Series 156 Enviro-Crete applied at 4.0 to 6.0 dry mils.

Third Coat: Tnemec Series 156 Enviro-Crete applied at 4.0 to 6.0 dry mils.

Total minimum dry film thickness shall be 8.0 mils.

B. Exterior Steel (Overfill Flap Valve)

1. Surface Preparation: Remove loose rust and clean surface by pressure washing, and any necessary mechanical cleaning, in accordance with the following SSPC standards.

SSPC-SP7/NACE 4 Brush-Off Blast Cleaning SSPC-SP2 Hand Tool Cleaning SSPC-SP3 Power Tool Cleaning

2. Coating System: Install Coating System in accordance with the manufacturer’s instructions and recommendations.

First Coat: Spot Prime any exposed bare metal after surface preparation with

Tnemec Series 132 ProTuff Mastic Second Coat: Full Coat of Tnemec Series 132 ProTuff Mastic Third Coat: Tnemec Series 1095 Endura-Shield

PART 3 - EXECUTION

3.01 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. Localized Containment for Cleaning Debris and Overspray: the Contractor shall ensure that no spent cleaning debris, dust, overspray, coating droplets, or emissions of any kind, escape to the adjacent buildings, private property, work sites, and parking lots. The contractor shall take every precaution available while cleaning and coating the tank, piping, valves and overflow weir to avoid dusting or spraying the tank site property, nearby residents, businesses, and vehicles with either blast debris or over-spray coating. The contractor shall be responsible to cleanup collect and dispose of all debris and media from blasting and cleaning operations per all City Ordinances and State and Federal Laws. The Contractor is responsible for any and all damages to on-site facilities, residences, vehicles and/or public health, including any fines or penalties resulting from improper blasting or coating activities.

Concrete Tank Rehab – Waco 09800-8

C. 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 and 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.

Unless otherwise approved in writing by the Engineer, prime coating shall be field applied.

Where prime coatings are shop applied, the Contractor shall instruct suppliers to provide the prime coat specified herein. Any off-site work which does not conform to this specification, is subjected to damage during transportation, construction or installation, shall be thoroughly cleaned and touched-up in the field as directed by the Engineer. The Contractor shall use repair procedures which insure the complete protection of all adjacent primer. The specified repair method and equipment may include wirebrushing, hand or power tool cleaning, or dry air blast cleaning. In order to prevent injury to surrounding painted surfaces, blast cleaning may require use of lower air pressure, smaller nozzle and/or abrasive blast particles, or shorter blast nozzle distances from surface shielding and masking. If damage is too extensive or uneconomical to touch-up, the entire item shall be blasted and then coated or painted as directed by the Engineer.

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.

3.02 SURFACE PREPARATION STANDARDS

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.

Concrete Tank Rehab – Waco 09800-9

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

3. Power Tool Cleaning (SSPC-SP3): Removal of loose rust, loose mil scale and other detrimental foreign matter to degree specified by hand chipping, scraping, sanding and wirebrushing.

4. White Metal Blast Cleaning (SSPC-SP5/NACE 1): 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 3): The removal of all visible oil, grease, dirt, dust, mil scale, rust, paint, oxides, corrosion products and other foreign matter by compressed air nozzle blasting centrifugal wheels or other specified method. Discoloration caused by certain stains shall be limited to no more than 33% of each square inch of surface.

6. Brush-Off Blast Cleaning (SSPC-SP7/NACE 4): Blast cleaning to remove loose rust, loose mil scale and other detrimental foreign matter degree specified.

7. Near White Blast Cleaning (SSPC-SP10/NACE 2): The removal of all visible oil, grease, dirt, dust, mil scale, rust, paint, oxides, corrosion products and other foreign matter by compressed air nozzle blasting, centrifugal wheels or other specified method. Discoloration caused by certain stains shall be limited to no more than 5% of each square inch of surface area.

8. Power Tool Cleaning to Bare Metal (SSPC-SP11): Power tool cleaning to produce a bare metal surface and to retain or produce a minimum 1.0 mil surface profile. This standard is suitable where a roughened, clean, bare metal surface is required, but where abrasive blasting is not feasible or permissible.

9. Surface Preparation of Concrete (SSPC-SP13/NACE 6): Surface preparation of concrete by mechanical, chemical, or thermal methods prior to the application of bonded protective coating or lining systems.

B.

1. Prepare concrete surfaces in accordance with manufacturer’s instructions, SSPC-SP 13/NACE 6 and ICRI Technical Guideline 310.2-1997.

2. Fill holes, pits, voids, and cracks with Tnemec Series 218 MortarClad.

3. Ensure surfaces are clean, dry, and free of oil, grease, chalk, form release agents, and other contaminants.

4. 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.

5. The Contractor shall keep the area of his work and the surrounding environment in a clean condition. He shall not permit blasting materials to accumulate as to constitute a

Concrete Tank Rehab – Waco 09800-10 nuisance or hazard to the accomplishment of the work, the operation of the existing facilities or to the surrounding environment.

3.03 APPLICATION, GENERAL

A. Thinning shall be permitted only as recommended by the manufacturer and approved by the Engineer.

B. 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.

C. 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.

D. 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.

E. Film thickness per coat as specified in Part 2 of this specification section are the minimum required. If roller application is deemed necessary, the Contractor shall apply additional coats to achieve the specified thickness.

F. All material shall be as specified.

3.07 WARRANTY

A. Contractor shall issue to the Owner a two-year warranty for workmanship and materials.

B. Coating Manufacturer shall issue to the Owner a two-year warranty for materials. Contractor and Coating Manufacturer shall coordinate warranty work requested by Owner at any time during warranty period.

3.08 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***

ATTACHMENT B-1 : GHOLSON GROUND STORAGE TANK

ROOF PHOTOGRAPHS 1

S:

\W at er

\C

IP

P M

\P R

O

JE

C

TS

\U

TI

LI

TI

ES

(L in es

)\C O

M

BI

N

ED

\C ity

C ou nc il

Ex hi bi ts

\D W

G s\

Ex hi bi ts

.d w g

P

LO

T D

AT

E:

7/

/2

9:

A

M by C

R

AI

G E

VA

N

G

EL

IS

TA

AutoCAD SHX Text

LEGEND

AutoCAD SHX Text

STAINLESS STEEL AND ALUMINIUM TO NOT BE COATED

AutoCAD SHX Text

STAINLESS STEEL AND ALUMINIUM TO NOT BE COATED

ATTACHMENT B-2 : GHOLSON GROUND STORAGE TANK

ROOF PHOTOGRAPHS 2

S:

\W at er

\C

IP

P M

\P R

O

JE

C

TS

\U

TI

LI

TI

ES

(L in es

)\C O

M

BI

N

ED

\C ity

C ou nc il

Ex hi bi ts

\D W

G s\

Ex hi bi ts

.d

T D

AT

E:

7/

/2

9:

R

AI

G E

VA

N

G

EL

IS

TA

AutoCAD SHX Text

LEGEND

AutoCAD SHX Text

CONCRETE SURFACE RUST

DO NOT COAT FILL PIPE

ATTACHMENT B-3 : GHOLSON GROUND STORAGE TANK

ROOF PHOTOGRAPHS 3

S:

\W at er

\C

IP

P M

\P R

O

JE

C

TS

\U

TI

LI

TI

ES

(L in es

)\C O

M

BI

N

ED

\C ity

C ou nc il

Ex hi bi ts

\D W

G s\

Ex hi bi ts

.d

T D

AT

E:

7/

/2

9:

R

AI

G E

VA

N

G

EL

IS

TA

AutoCAD SHX Text

LEGEND

VENT COVER TO NOT BE COATED

ATTACHMENT B-4 : GHOLSON GROUND STORAGE TANK

OVERFLOW FLAT VALVE

S:

\W at er

\C

IP

P M

\P R

O

JE

C

TS

\U

TI

LI

TI

ES

(L in es

)\C O

M

BI

N

ED

\C ity

C ou nc il

Ex hi bi ts

\D W

G s\

Ex hi bi ts

.d

T D

AT

E:

7/

/2

9:

R

AI

G E

VA

N

G

EL

IS

TA

LEGEND