ADDENDUM No. 2 To

L.S. #13 REHABILITATION

March 26, 2026

ST. MARYS, GEORGIA

Bids received until 2:00 P.M., Local Time, March 31, 2026

ACKNOWLEDGE RECEIPT OF THIS ADDENDUM BY INSERTING ITS NUMBER IN THE BID FORM.

THIS ADDENDUM FORMS A PART OF THE PROJECT DOCUMENTS. IT MODIFIES THEM AS FOLLOWS:

CLARIFICATIONS:

1. An onsite trailer for the engineer will NOT be required.

2. As stated, Section 00250 Instruction for Submitting Bid Proposals, the Immigration and Security Form Section 00490 is required to be submitted with the bid proposal. The general contractor will need to submit their 00490 form with their bid proposal. The sub-contractors’ Immigration and Security forms can be submitted post award of the project.

QUESTIONS & RESPONSES:

1. The specifications and addendum detail a liner for the new lift station. Does the existing lift station need a liner installed as well?

Engineer Response: No, it currently has a liner.

2. Can the existing transformer be moved to the Northwest corner of the site to allow more room for equipment during the excavation of the new lift station?

Engineer Response: We do not have an issue with placing the new transformer in a different location if it stays within the boundary of the parcel. Keep in mind, the existing pump station will need to stay energized during construction, thus the existing transformer will remain operable.

3. In lieu of a 12’ diameter lift station would the owner allow a 10’ x 11.5’ (inside dimensions) rectangular lift station?

Engineer Response: No, the 12’ diameter wet well is required.

PLEASE CHANGE THE FOLLOWING CONTRACT DOUMENTS AND TECHNICAL

SPECIFICATIONS

1. SECTION 09980 – PROTECTIVE LINING FOR CONCRETE: Delete this section and replace with new SECTION 09980 – PROTECTIVE LINING FOR CONCRETE attached.

END OF ADDENDUM No. 2

SECTION 09980

PROTECTIVE LINING FOR CONCRETE

REV. 3/25/26 Addendum No. 2 2025 LS 13 Rehabilitation Protective Lining for Concrete 09980-1 CSAV250003

PART 3 - GENERAL

3.03 SUMMARY

A. Scope:

1. Contractor shall provide all labor, materials, equipment and incidentals as specified, shown, and required to furnish, install, and place into satisfactory service the protective liner for concrete Work.

2. Where not otherwise shown, extent of the protective lining shall be located 1) interior/channel walls of the structures and/or manholes to be protected and, 2) interior surface of lids and top slabs (soffits) of structures to be protected.

3. Types of protective lining for concrete Work required include, but are not necessarily limited to, the following:

a. Polyurea Adhesion Layer

b. Polyurethane Liner

c. Polyurea Surface Layer

4. Cleaning, surface preparation, lining application, and thicknesses shall be as specified herein and shall meet or exceed the lining manufacturer’s recommendations. When the manufacturer’s minimum recommendations exceed the specified requirements, Contractor shall comply with the Manufacturer’s minimum recommendations.

B. Coordination:

1. Coordinate surface preparation of substrates to avoid later difficulty or delay in performing the Work of this Section.

2. Review installation procedures under other Sections and coordinate the installation of items that must be installed prior to application of the protective lining.

3. All substrate surface preparation and lining application, including concrete resurfacing, to be completed by manufacturer’s approved Applicator.

4. The Contractor shall coordinate with Engineer regarding the availability of work areas, completion times, safety, access and other factors which can impact plant operations.

C. Related Sections:

1. Section 02532 - Manholes and Covers

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3.04 REFERENCES

A. This Section contains references to the governing standards and documents listed below. They are a part of this Section as specified and modified; the current version shall apply unless otherwise noted. In case of conflict between the requirements of this section and those of the listed documents, the more stringent of the requirements shall prevail.

1. American Concrete Institute, (ACI)

a. ACI 224.1R – Causes, Evaluation and Repair of Cracks in Concrete Structures

b. ACI 301 – Specifications for Structural Concrete

c. ACI 308R – Guide to Curing Concrete

d. ACI 350 – Code Requirements for Environmental Engineering Concrete Structures and Commentary

e. ACI 515 – A Guide to the use of Waterproofing, Dampproofing, Protective, and

Decorative Barrier Systems for Concrete

f. ACI 546.R – Concrete Repair Guide

g. ACI 546.3R – Guide for the Selection of Materials for the Repair of Concrete

2. ASTM International, (ASTM)

a. ASTM C 868 – Standard Test Method for Chemical Resistance of Protective Linings

b. ASTM C 1583/1583M – Standard Test Method for Tensile Strength of Concrete

Surfaces and the Bond Strength or Tensile Strength of Concrete Repair and Overlay Materials by Direct Tension (Pull-off Method)

c. ASTM D 2794 – Standard Test Method for Resistance of Organic Linings to the Effects of Rapid Deformation (Impact)

d. ASTM D 4060 – Standard Test Method for Abrasion Resistance of Organic Linings by the Taber Abraser

e. ASTM D 4285 – Standard Test Method for Indicating Water or Oil in Compressed Air

f. ASTM D 4263 – Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method

g. ASTM D 4414 – Standard Practice for Measurement of Wet Film Thickness by Notch Gages

h. ASTM D 6944 Standard Test Method for Measuring Humidity with a Physchrometer

i. ASTM D 7682 – Standard Test Method for Replication and Measurement of Concrete Surface Profiles Using Replica Putty

j. ASTM F 1869 – Standard Test Method for Measuring Moisture Vapor Emission Rate of Concrete Subfloor Using Anhydrous Calcium Chloride

k. ASTM F 2170 – Standard Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in situ Probes

l. ASTM F 2414 – Standard Practice for Sealing Sewer Manholes Using Chemical Grouting

3. International Concrete Repair Institute, (ICRI)

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a. Guideline No. 310.1R – Guide for Surface Preparation for the Repair of Deteriorated Concrete Resulting from Reinforcing Steel Corrosion

b. Guideline No. 310.2 – Selecting and Specifying Concrete Surface Preparation for Sealer, Linings, and Polymer Overlays

4. NACE International, (NACE)

a. NACE Publication 6D-173 – A Manual for Painter Safety

b. NACE SP0188 – Standard Practice for Discontinuity (Holiday) Testing of Protective

Linings

c. NACE SP0892 – Standard Practice for Coatings and Linings over Concrete for

Chemical Immersion and Containment Service

d. NACE No. 6/SSPC-SP13 – Surface Preparation of Concrete

5. Occupational Safety and Health Administration, (OSHA)

a. Safety and Health Standards (29 CRF 1910/1926)

6. SSPC: The Society for Protective Linings, (SSPC)

a. SSPC-SP13/NACE No. 6 – Surface Preparation of Concrete

b. SSPC-Guide 12 – Guide for Illumination of Industrial Painting Projects

B. Unless otherwise specified, references to documents shall mean the documents in effect at the time of receipt of Bids. If referenced documents have been discontinued by the issuing organization, references to those documents shall mean the replacement documents, the last version of the document before it was discontinued.

3.05 QUALITY ASSURANCE

A. Applicator Qualifications:

1. Contractor shall be a qualified Applicator by the corrosion protection lining manufacturer prior to bid date. Submit proof of acceptability of Applicator by manufacturer to Engineer.

2. Installation equipment shall be acceptable to the protective lining manufacturer.

3. Applicator to establish quality control procedures and practices to monitor phases of surface preparation, storage, mixing, application, and inspection throughout the duration of the project. Contractor to provide a fulltime, on-site person whose dedicated responsibilities will include quality control of the corrosion protection linings.

B. Performance Criteria: The surfaces to receive the protective lining shall be capable of withstanding under constant exposure to raw wastewater, permeation from hydrogen sulfide and other sewer gases, and attack from organic acids generated by microbial sources. Products must have sufficient field history and accelerated laboratory testing to substantiate product viability for these exposures.

C. Source Quality Control: Provide each component of protective lining produced by a single manufacturer, including recommended repair mortar, repair overlay (resurfacer), base coat and topcoat materials.

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D. Reference Standards: Comply with applicable provisions and recommendations of all standards listed in Section 1.2 except as otherwise shown or specified.

3.06 SUBMITTALS

A. In accordance with the procedures and requirements set forth in the General Conditions and Section 01330 entitled “Submittals”, the Contractor shall submit all required information as specified herein.

B. Shop Drawings: Submit PDF’s for approval prior to commencing any Work:

1. Product Data Sheets: Copies of current technical data for each component specified and applied as outlined in this Section.

2. Material Safety Data Sheets: Copies of current MSDS for any materials brought on-site including all clean-up solvents, repair or resurfacing mortars and lining materials.

3. Qualification Data: Approved Installer Training Certificates from manufacturer.

4. Performance Testing Reports: Copies of test data for the entire physical, chemical, and permeation properties listed herein and as outlined within this Section.

5. Construction Details: Copies of manufacturer’s computer-generated standard lining details for specified materials, including: leading edge termination, metal embedment in concrete, joint detail, wall-to-slab detail, pipe termination detail, and any other detail at the request of the Engineer.

6. Product Substitution: The specified corrosion protection lining is the minimum standard of quality for this project. Equivalent materials of other manufacturers may be substituted only by approval of Engineer. Requests for material substitutions shall be in accordance with requirements of the project specification.

a. Manufacturers of “or equal” products shall provide direct property comparison with the materials specified in addition to complying with all other requirements of these Specifications. “Or equal” products shall employ the same generic materials and system components as the corrosion protection lining specified. “Or equal” products shall provide equivalent performance as the specified corrosion protection lining.

b. Bidders desiring to use corrosion protection lining other than those specified shall submit proposed system with their proposal at the time of bid, together with the information required herein, and indicate the sum which will be deducted from the base bid should alternate materials be accepted.

C. Jobsite Reports: Submit at the completion of Work

1. Quality Control Reports: Include all quality control testing and physical specimens.

2. Contractor shall maintain a copy of records until the expiration of the specified warranty period.

3.07 PRODUCT DELIVERY, STORAGE, AND HANDLING

A. Delivery of Materials:

1. Deliver material in manufacturer’s original, unopened and undamaged packages.

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2. Clearly identify manufacturer’s, brand name, contents, color, batch number, and any personal safety hazards associated with the use of or exposure to the materials on each package.

3. Packages showing indications of damage that may affect condition of contents are not acceptable.

B. Storage of Materials:

1. Materials shall be stored in accordance with manufacturer's recommendations in enclosed structures and shall be protected from weather and adverse temperature conditions.

Flammable materials shall be stored in accordance with state and local codes. Materials exceeding storage life as defined by the manufacturer shall be removed promptly from the site. Store all materials only in area or areas designated by the Engineer solely for this purpose.

2. Store in original packaging under protective cover and protect from damage.

3. Stack containers in accordance with manufacturer’s recommendations.

C. Handling of Materials: Handle materials in such a manner as to prevent damage to products or finishes.

3.08 JOB CONDITIONS

A. Environmental Requirements:

1. Proceed with corrosion protection lining Work only when temperature and moisture conditions of substrates, air temperature, relative humidity, dew point and other conditions comply with the corrosion protection lining manufacturer’s written recommendations and when no damaging environmental conditions are forecasted for the time when the material will be vulnerable to such environmental damage. Record all such conditions and include in final Site Quality Control Report.

2. Maintain substrate temperature and ambient temperature before, during and after installation above 50°F (10°C) and rising in accordance with protective lining material manufacturer’s instructions.

3. Provide adequate ventilation during instillation and full curing periods of the protective lining.

4. Protective Lining shall not be applied when ambient air temperature is within 5°F (3°C) of the dew point and falling.

5. Protective Lining shall not be applied when relative humidity is outside of material manufacturer’s recommendations. Do not prepare surfaces or apply materials in rain, snow, fog, mist, or otherwise inclement weather as per material manufacturer’s instructions.

B. Dust and Contaminants: Protect work and adjacent areas from excessive dust and airborne contaminates during protective lining application and curing. Schedule Work to avoid excessive dust and airborne contaminants

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3.09 WARRANTY

A. Protective Lining Manufacturer shall warranty its products as free from material defects for a minimum period of five (5) years. Provide associated Warranty Certificate.

B. Contractor shall warranty the installed protective lining system as free from workmanship defects for a minimum period of three (3) years.

PART 4 - PRODUCTS

4.01 MANUFACTURERS

A. The Corrosion Protection Lining System shall be:

1. Total Lining System for Wastewater Structures by SpectraShield

2. Or Approved Equal

4.02 MATERIALS

A. The minimum application thickness of the high strength epoxy shall be 500 mils for as specified

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B. by SpetraShield or approved equal.

C. Following surface preparation, all surfaces to be lined shall receive an application of resurfacing compounds consisting of an epoxy-polymer modified cementitious resurfacer (thin overlay) applied to a depth up to ¼-inch to fill all bugholes, surface imperfections and provide a uniform level substrate for application of the protective lining.

D. The resurfacer shall be:

1. SpetraShield Polyurethane/Polymeric blend foam

2. Or Approved Equal

E. SpetraShield: Materials to be utilized in the lining of wastewater structures shall be designed and manufactured to withstand the severe effects a wastewater environment. The manufacturer of the corrosion protection products shall have at least 10 years of experience in the production of the lining products utilized, and the products shall have satisfactory installation record.

Equipment for installation of lining materials shall be of high quality and as recommended by the manufacturer.

The lining system to be utilized for wastewater structures shall be a multi-layer ‘stress skin panel’ liner system as described below:

1. Liner. Installation Liner Moisture barrier Modified Polymer (Silicone modified polyurea).

Surfacer Polyurethane/Polymeric blend foam.

Final corrosion barrier Modified polymer (Silicone modified Polyurea).

2. The Modified polymer (silicone modified polyurea) shall be sprayable, solvent free, two-component polymeric, moisture/chemical barrier specifically developed for the corrosive wastewater environment.

3. The Polyurethane Rigid Structure Foam, shall be low viscosity two-component, containing flame retardants.

4. Total thickness of multi-layer liner system shall be a minimum of 500 mils.

Product: SpectraShield – A two component 100% solid Modified Polyurea.

a. Tensile Strength (ASTM D412-06) 2,550 psi

b. Flexibility (1/8” Mandrel ASTM D522-13) Pass

c. Tear Strength (PLI) (ASTM D624-00) 428

d. Elongation (%) (ASTM D412-06) 269

e. Shore D Hardness (ASTM D2240-05) 56

F. Contractor shall provide all accessory components such as polysulfide sealants, and curing compounds, as recommended by the manufacturer for maximum protective lining adhesion to substrate, and long-term service performance.

G. Equal Products:

1. As part of proof of equality, the Engineer will require at the cost of the Contractor, comparative laboratory tests as directed by the Engineer between the product specified and the requested substitution.

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2. Requests for substitution shall include manufacturer’s literature for each product giving name, product number, generic type, descriptive information, laboratory testing showing results to equal the performance criteria of the products specified herein. In addition, a list of ten projects shall be submitted in which each product has been used and rendered satisfactory service.

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

PART 5 - EXECUTION

5.01 GENERAL

A. Contactor shall provide, erect, and maintain all required hoists, scaffolding, staging and planking, and perform all access related hoisting work required to complete the Work of this Section as specified.

B. Contractor shall cover or otherwise protect finish work or other surfaces not being coated within the scope of this Section. Contractor shall erect and maintain protective tarps, enclosures and/or masking to contain debris, including dust or other airborne particles from surface preparation or application activities. This may include the use of dust or debris collection apparatus as required at no additional cost to Owner.

5.02 INSPECTION

A. Contractor shall examine the areas and conditions under which the protective coating Work is to be performed in accordance with NACE SP0892, Table 1 and SSPC-SP13/NACE No. 6, and notify Engineer in writing of conditions detrimental to the proper and timely completion of the Work.

B. Contractor shall confirm the presence of a positive side waterproofing on the exterior of the concrete structure.

C. Commencement of the Work of this Section shall indicate that the substrate and other conditions of installation are acceptable to the Contractor and his Applicator, and will produce a finished product meeting the requirements of the Specifications. All defects resulting from accepted conditions shall be corrected by Contractor at his own expense.

5.03 PREPARATION

A. Concrete surfaces to receive protective coating shall be cast with a Smooth Form Finish in accordance with ACI 301. Surfaces shall not be rubbed, sacked, troweled or otherwise finished in any manner that will obscure or cover the parent concrete surface with materials other than materials as specified in this Section.

B. Allow cast-in-place concrete to cure for a minimum of 28 days at 75°F (24°C) and with adequate air movement before installing the corrosion protection lining system.

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C. All surface washing, abrasive blasting, waterjetting, grinding, patching, filling and preparation shall be completed by the Applicator in accordance with the Protective Coating Manufacturer’s recommendations.

D. Substrate: Concrete surfaces to be coated shall be free of curing compounds and form release agents, laitance and foreign particles that my inhibit bonding. Prior to start of protective coating systems application, pre-clean as required, and inspect the substrate in accordance with SSPC- SP13/NACE No. 6, Severe Service. Surface preparation procedures shall be in accordance with NACE SP0892, SSPC-SP13/NACE No. 6 and ICRI Guideline No. 310.2. Surface preparation shall expose aggregate and obtain a uniform surface texture resembling the minimum recommended concrete surface ICRI-CSP profile.

E. Level or grind concrete substrates to produce a uniform and smooth surface, including removal of all sharp edges, ridges, form fins, and other concrete protrusions.

F. New Concrete Application: All voids, bugholes, and other surface depressions shall be filled with the specified epoxy-modified resurfacer, re-establishing plan finished grades and concrete planes.

The thin overlay shall be applied as a continuous parge coat at a minimum 1/16 inch (1.6 mm) thickness to the entire concrete surface.

G. Existing Concrete Application: Existing concrete structures to receive protective coating system must be capable of withstanding imposed loads. All oil, grease, waste and chemical contaminants must be removed from the surface of the concrete prior to preparation in accordance with NACE SP0892 and SSPC-SP13/NACE No. 6. Concrete surfaces must be sound and capable of supporting the Protective Lining system as determined by the engineer. Surface preparation requirement is to expose a sound, uniform surface texture confirming to the minimum recommended ICRI-CSP. The appropriate cementitious repair mortar or epoxy cementitious resurfacer material shall be applied to the entire, prepared surface to level surface suitable for coating.

H. Metal Application: Remove all visible contaminants per SSPC-SP1. Prepare the surfaces in accordance with SSPC/NACE surface preparation standards per the Manufacturer’s instructions.

5.04 APPLICATION

A. Protective coating systems shall be installed when ambient air and surface temperature is above manufacturer’s recommendation. The substrate temperature shall be at least 5°F (3°C) above the dew point. Condition the material between 70-80°F (21-27°C) for 24 hours prior to use.

Application when temperatures outside of this range will require written instruction from the Manufacturer and approval of the Engineer.

B. Application in direct sunlight and/or with rising surface temperatures is not allowed, as this may result in blistering of the materials due to expansion of entrapped air or moisture in the concrete.

In such cases, it will be necessary to postpone the application until later in the day when the temperature of the substrate is falling. Concrete surfaces that have been in direct sunlight should be shaded for at least 24 hours prior to application. Consult the Manufacturer for application schedule guidelines specific to temperature conditions and possible sealer application recommendations to reduce outgassing.

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C. Cementitious Repair Mortar: Cementitious repair mortar shall be used for structural repairs or surface repairs exceeding a depth 1/4 inch (7 mm) in accordance with Manufacturer’s written instructions as outlined in the product data sheet and application guide.

D. Application procedures shall conform to the recommendations of the coating product(s) manufacturer, including environmental controls, product handling, mixing, application equipment, and methods.

E. Spray equipment shall be specifically designed to accurately ratio and apply the coating product(s) and shall be in proper working order.

F. Contractors qualified by the manufacturer to install the product shall perform all aspects of coating product(s) installation.

G. Prepared surfaces shall be coated via spray application of the coating product(s) described herein unless otherwise recommended by the coating product manufacturer.

H. Coating thickness shall be in relation to the profile of the surface to be coated as recommended by the coating product manufacturer.

I. Coating product(s) shall interface with adjoining construction materials/components throughout the precast structure to effectively seal and protect substrates from attack by corrosive elements and to ensure the effective elimination of infiltration into the sewer system.

J. Procedures and materials necessary to effect the interface between dissimilar materials and the coating product shall be as recommended by the coating product(s) manufacturer.

5.05 FIELD QUALITY CONTROL, INSPECTION AND TESTING

A. Contractor to perform the quality control procedures listed below in conjunction with the requirements of this Section.

B. Inspect all materials upon receipt to ensure that all are supplied by the approved Manufacturer.

C. Surface Profile: Inspect and record substrate profile (anchor pattern). Surfaces shall be profiled, at a minimum, equal to the CSP roughness as recommended by the coating manufacturer in accordance with ICRI Guideline 310.2 and SSPC-SP13/NACE No. 6.

D. Provide verification of correct mixing of coating materials in accordance with the Manufacturer’s instructions.

E. Inspect and record that the "pot life" of coating materials is not exceeded during installation.

F. Verify curing of the coating materials in accordance with the Manufacturer's instructions.

G. Dry-Film Thickness:

1. Wet-Film Thickness shall be taken every 100 square feet (9 square meters) in accordance with ASTM D 4414 and recorded.

2. The Dry-Film Thickness can be determined using a surface area calculation for material consumption.

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H. Contractor is responsible for keeping the Owner/Engineer informed of all progress so that Engineer may provide additional quality control at his discretion.

I. Inspection by the Engineer or others does not absolve the Contractor from his responsibilities for quality control inspection and testing as specified herein or as required by the Manufacturer's instructions

5.06 ACCEPTANCE CRITERIA

A. All surfaces shall be prepared, applied, and tested in accordance with the specification and referenced standards herein.

B. If test results indicate noncompliance with the specification, the following corrective action may be required of the Contractor:

1. Remove non-compliant systems or components.

2. Replace system or components in (1)

C. Minimum requirements of the corrosion protection coatings and/or lining system are that it be free of the following:

1. Uncured material

2. Inadequate thickness

3. Pinholes

4. Blisters

5. Delamination

6. Foreign matter

7. Unspecified materials

5.07 ADJUSTMENTS AND CLEANING

A. At the completion of the Work, Contractor shall remove all materials and debris associated with the Work of this Section.

B. Clean all surfaces not designated to receive protective coating. Restore all other work in a manner acceptable to Engineer.

C. All finished protective coating shall be protected from damage until Final Acceptance of the Work. Protective coating damaged in any manner shall be repaired or replaced at the discretion of Owner/Engineer, at no additional cost to Owner.

END OF SECTION

4. Cleaning, surface preparation, lining application, and thicknesses shall be as specified herein and shall meet or exceed the lining manufacturer’s recommendations. When the manufacturer’s minimum recommendations exceed the specified requirements, ...

B. Unless otherwise specified, references to documents shall mean the documents in effect at the time of receipt of Bids. If referenced documents have been discontinued by the issuing organization, references to those documents shall mean the replace...

C. Handling of Materials: Handle materials in such a manner as to prevent damage to products or finishes.

B. Dust and Contaminants: Protect work and adjacent areas from excessive dust and airborne contaminates during protective lining application and curing. Schedule Work to avoid excessive dust and airborne contaminants