SECTION F

TECHNICAL SPECIFICATIONS

CSA 70 J RECOATING OF TANKS

& PUMP STATIONS PROJECT

FOR

COUNTY SERVICE AREA 70 J

OAK HILLS, CALIFORNIA

PROJECT NO.: 30.30.0193

SAN BERNARDINO COUNTY

SPECIAL DISTRICTS DIVISION

SPECIFICATIONS AND CONTRACT DOCUMENTS

FOR

CSA 70 J RECOATING OF TANKS

& PUMP STATIONS PROJECT

Oak Hills, CA 92345

August 08, 2025

Submitted to:

Enrique Carrillo Jr., Project Manager

Department of Public Works, Special Districts Division

222 W. Hospitality Lane, 2nd Floor

San Bernardino, CA 92415

SAN BERNARDINO COUNTY SPECIAL DISTRICTS

CSA 70J RECOATING OF TANKS & PUMP STATIONS PROJECT

SECTION INDEX

SECTION

SECTION 01000 – SUMMARY OF WORK ........................................................................... 1-14 SECTION 02100 – MOBILIZATION/DEMOBILIZATION/CLEANUP ........................................ 1-4 SECTION 09800 –TANK COATING AND PAINTING ............................................................ 1-22 SECTION 13200 - MISC. STRUCTURAL MODIFICATIONS .................................................... 1-8

May 2024 Section 01000 - 1

SECTION 01000 - SUMMARY OF WORK

PART 1 - GENERAL

1.1 WORK UNDER THIS CONTRACT

A. The contractor shall furnish all labor, equipment and materials as required by these specifications for the following reservoirs. (The dimensions are approximate only and shall be field verified by the Contractor prior to bidding.)

TANK SIZE DIMENSIONS

1. TANK SITE 2B .428 MG 55 ft. Dia. x 24 ft. Ht.

2. TANK SITE 3A-1 .122 MG 36 ft. Dia. x 16 ft. Ht.

3. TANK SITE 3A-2 .122 MG 36 ft. Dia. x 16 ft. Ht.

4. TANK SITE 3B .43 MG 55 ft. Dia. x 24 ft. Ht.

5. TANK SITE 4A-1 .122 MG 36 ft. Dia. x 16 ft. Ht.

6. TANK SITE 4A-2 .284 MG 36 ft. Dia. x 16 ft. Ht.

7. TANK SITE 4B .284 MG 55 ft. Dia. x 16 ft. Ht.

8. TANK SITE WELL 1 .127 MG 30 ft. Dia. x 24 ft. Ht.

9. TANK SITE WELL 3 .038 MG 20 ft. Dia. x 16 ft. Ht.

10. TANK SITE RBS .135 MG 24 ft. Dia. x 40 ft. Ht.

BOOSTER STATIONS:

1. TANK SITE 2A – BOOSTER BUILDING

2. TANK SITE 2B – BOOSTER BUILDING

3. TANK SITE 3A – BOOSTER BUILDING

4. TANK SITE 3B – BOOSTER BUILDING

5. TANK SITE WELL 1 – BOOSTER BUILDING

6. TANK SITE WELL 2 – BOOSTER BUILDING

7. TANK SITE RBS – BOOSTER BUILDING

May 2024 Section 01000 - 2

B. Work to be performed furnishing all labor, materials, equipment, tools, transportation, and incidentals necessary to complete the exterior rehabilitation and recoating of the structures as indicated in the Contract Documents. Work includes modification and repair of miscellaneous exterior structural components to bring the structures into compliance with applicable current safety and health codes, standards, and regulations; surface preparation of all designated exterior surfaces, including removal of existing coatings and preparation of substrates in accordance with coating manufacturer requirements;

application of new exterior coating systems to achieve a complete, uniform, and protective finish; handling, containment, collection, transportation, and disposal of hazardous and non-hazardous materials and waste generated by the work; and protection of adjacent structures, equipment, appurtenances, and the environment throughout all phases of construction. The Contractor shall perform all work necessary to provide fully functional, code-compliant, and long-term-protected exterior structures, including all attachments, accessories, and appurtenances identified in the plans and specifications, in full accordance with the Contract Documents and applicable regulatory requirements. The following items are required, except as otherwise noted, generally as follows:

1. Electrically detect 100% solids epoxy coating system and repair as required.

2. Apply a flexible sealant to inaccessible voids as designated by the Engineer and all roof lap seams.

May 2024 Section 01000 - 3

3. Contain the exterior of the reservoir and remove all exterior paint from roof, shell, piping and appurtenances by abrasive blast cleaning or other approved method.

4. Apply specified primer to all exterior surfaces blasted cleaned in Item 10. above, roof, shell, piping, and appurtenances.

5. Apply intermediate and finish coats of paint to all exterior surfaces primed in Item

11. above.

6. Test, handle and dispose of hazardous and non-hazardous wastes generated from exterior painting operations in conformance to all regulations.

7. Remove existing liquid level indicator gauge board and equipment and install a completely new liquid level indicator system at location designated on the plans.

OPTIONAL BID ITEMS

8. Fill or weld plates over excessively pitted or corroded areas, as determined necessary by the Engineer.

9. Excessively corroded areas on the rafters that comprise of sharp edges from sandblasting shall be ground smooth and rounded, as determined necessary by the Engineer.

10. Furnish all labor, materials, and equipment to abrasively blast clean severely corroded areas, as determined necessary by the Engineer.

11. Remove and replace severely corroded rafters and/or tie-rods, as determined

12. Weld rafters to gusset plates at shell connections with severely corroded nuts and bolts, as determined necessary by the Engineer.

13. Replace severely corroded nuts and bolts and/or gusset plates, as determined

C. Surfaces not to be painted include fencing, concrete surfaces, liquid level indicator accessories, glass, plastic, nameplates, communication equipment and other surfaces on which coatings or paints would not adhere or would interfere with operation of specific item.

D. If severely corroded or damaged areas are discovered during the course of abrasive blast cleaning operations, the Contractor shall notify the Engineer or authorized representative.

Welding and repair of severely corroded areas of tank and other mechanical repairs may be required during project.

1. The Contractor shall allow the District access to make tank repairs while the existing coatings or paints are being removed.

2. A time extension will be issued should structural repairs preclude abrasive blast cleaning and/or coating or paint application. Preparation work shall continue while

May 2024 Section 01000 - 4 tank repairs are being made. The time extension will assume the Contractor will be able to re-mobilize and begin coating and painting within two weeks of notification. No additional time will be granted to permit the Contractor

May 2024 Section 01000 - 5 to complete other projects prior to this project.

1.2 REFERENCE SPECIFICATIONS AND STANDARDS

A. Without limiting the general aspects or other requirements of this specification, work and equipment shall conform to applicable requirements of municipal, state and federal codes, laws and ordinances governing the work, manufacturer's printed instructions, subject to Engineer's approval.

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

1.3 DEFINITIONS

A. The following pairs of words shall be considered identical in meaning and may be used interchangeably: “District” and “Owner”; “General Conditions” and “General Provisions”;

“Drawings” and “Plans”; “Standard Drawings” and “Standard Plans”.

B. The District referred to in these specifications is San Bernardino County Special Districts

Water and Sanitation Division. Engineer shall be person or persons as designated by the District.

C. The definition of the word “Engineer” contained herein is: The person authorized by the

District to oversee the execution of the contract, acting either directly or through his properly authorized agents, each agent acting only within the scope of authority delegated to him.

1.4 HOURS OF WORK

A. The Contractor's activities shall be confined to an eight-hour shift between the hours of 8:00 a.m. and 4:30 p.m. Monday through Friday, excluding District-designated holidays.

No equipment will be permitted to operate before 8:00 a.m., excluding dehumidification equipment authorized by the District. Deviation from these hours will not be permitted without the prior consent of the District, except in emergencies involving immediate hazard to persons or property.

B. In the event of either a requested or emergency deviation, inspection service fees for

District personnel and any third-party inspector will be charged against the Contractor.

The service fees will be calculated at full overtime rates including benefits, overhead, and travel time. The service fees will be deducted from any amounts due the Contractor.

Charges will be made for any change to extraordinary work hours, including standby time due to late crew arrival or “no-show” by crew.

C. Inspection hours made necessary as a result of the Contractor’s crew working over forty hours per week must be scheduled and approved by District and paid for by Contractor at the prevailing rate for overtime. Inspections requested by or made necessary as a result of actions by the Contractor on Saturdays, Sundays or holidays must be scheduled and approved by District and paid for by Contractor at the prevailing rate for overtime or holiday work.

May 2024 Section 01000 - 6

1.5 COMPLETION OF WORK

A. All work shall be completed within the number of calendar days consistent with the Contract Period noted in the Contract Documents. If work is not completed within the number of calendar days specified, Contractor shall bear all additional expenses incurred after contract completion schedule.

B. The Contractor shall begin mobilizing upon the County’s issuance of the Notice to Proceed.

Work on Tanks 2A and 2B cannot be performed simultaneously, therefore the Contractor shall allow for a three-week period between tank projects to allow the County to switch over the tanks. Tank 2A will be the first tank taken out of service for rehabilitation.

1.6 EXTRA WORK

A. The District may, as the need arises, order changes in work through additions, deletions, or modifications, without invalidating the Contract. Such changes will be affected through written change orders delivered to the Contractor describing the change required in the work, together with any adjustment in contract price or time of completion as hereinafter provided. No such change shall constitute the basis of claims for damages or anticipated profits; however, the Engineer will make reasonable allowance for the value of any work, materials, or equipment furnished and subsequently rendered useless because of such change. Any adjustment in Contract price resulting from a change order will be considered in computing subsequent monthly payments due the Contractor. Any work performed in accordance with a change order shall be subject to all provisions of the original Contract, and the Contractor's sureties shall be bound thereby to the same degree as under the original Contract. The Contractor will not receive payment for extra work performed unless said extra work is ordered in writing.

B. Any adjustment in contract price shall be based on unit price bid items or additive and deductive bid items submitted by the Contractor in his original bid on the work where such bid items are applicable, or time and material rates established at the Pre-Construction Conference.

1.7 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 acceptable professional standards and are approved by the Engineer.

B. All materials furnished and all work accomplished under the Contract shall be subject to inspection by the Engineer. The Contractor shall be held strictly to the true intent of the Specifications in regard to quality of materials, workmanship, and diligent execution of the Contract.

C. Work accomplished in the absence of prescribed inspection may be required to be removed and replaced under the proper inspection, and the entire cost of removal and replacement, including the cost of all materials which may be furnished by the District and used in the work thus removed, shall be borne by the Contractor, regardless of

May 2024 Section 01000 - 7 whether the work removed is found to be defective or not. Work covered up without the authority of the Engineer or Inspector, shall, upon order of the Engineer, be uncovered to the extent required, and the Contractor shall similarly bear the entire cost of accomplishing all the work and furnishing all the materials necessary for the removal of the covering and its subsequent replacement, as directed and approved by the Engineer.

D. Except as otherwise provided herein, the cost of inspection will be paid by the District.

E. The Engineer will make, or have made, such tests as he deems necessary to assure the work is being accomplished in accordance with the requirements of the Contract. Unless otherwise specified in the Special Conditions, the cost of such testing will be borne by the District. In the event such tests reveal non-compliance with the requirements of the Contract, the Contractor shall bear the cost of such corrective measures deemed necessary by the Engineer, as well as the cost of subsequent retesting and re-inspection.

It is understood and agreed the making of tests shall not constitute an acceptance of any portion of the work, nor relieve the Contractor from compliance with the terms of the Contract.

F. Warranty Inspection: Warranty inspection shall be conducted between the eleventh and sixteenth months following completion of all work and filing of the Notice of Acceptance.

The draining of the tanks will be accomplished when there will be minimum inconvenience to the District. All personnel present at the Pre-Construction Conference should be present at this inspection. All defective work shall be repaired in strict accordance with this specification and to the satisfaction of the Engineer.

1. Notification: The District shall establish the date for the inspection and shall notify the Contractor at least 30 days in advance. The District will drain the tank and Contractor shall provide, at his own expense, suitable lighting, scaffolding and ventilation for the inspection. At the District's option, warranty inspection for interior surfaces may be accomplished by diving operations with tank in service.

2. Interior Inspection: The entire interior coating systems shall be visually inspected as specified in 1.7 QUALITY ASSURANCE. All defective coating as well as damaged or rusting spots of the tank shall be satisfactorily repaired by and at the sole expense of the Contractor. All repaired areas shall then be electrically tested as specified in the above-mentioned section and repair/electrical testing procedure repeated until surface is acceptable to the Engineer.

3. Exterior Inspection: The entire exterior paint systems shall be visually inspected as specified in 1.7 QUALITY ASSURANCE. All defective paint as well as damaged or rusting spots of the tank shall be satisfactorily repaired by and at the sole expense of the Contractor. All repaired areas shall then be again inspected as specified in the above-mentioned section and repair procedure repeated until surface is acceptable to the Engineer.

4. Structural Inspection: The entire work shall be visually inspected as specified. All defective work shall be satisfactory repaired by and at the sole expense of the Contractor.

5. Inspection Report: The Engineer shall prepare an inspection report covering the

May 2024 Section 01000 - 8 first anniversary inspection, setting forth the number and type of, defects observed, failures observed, the percentage of the surface area where failure has occurred, and the names of the persons making the inspection.

6. Schedule: Upon completion of inspection and receipt of Inspection Report as noted herein, District shall notify Contractor of results of inspection and establish a date for Contractor to proceed with remedial work. Any delay on part of Contractor to meet schedule may cause District to proceed to have defects remedied by others as outlined under General Provisions.

7. Remedial Work: The Contractor shall make repairs at all points where defects are observed by removing the defective work and repairing or replacing it to bring the item into total conformance to the original specification. Any location where coating or paint has peeled, bubbled, or cracked and any location where rusting is evident shall be considered to be a failure of the system. The Contractor shall make repairs at all points where failures are observed by removing the deteriorated coating or paint, cleaning the surface, and reapplying the same system per original specification. If the area of failure exceeds 25 percent of a specific coated or painted surface, the entire applied system may be required to be removed and reapplied based on the District's sole judgment in accordance with the original specification.

a. Specific coated surfaces are defined as follows:

(1) Underside of roof and structural members

(2) Shell & Columns

(3) Floor

(4) Attachments, accessories and appurtenances

(5) Flexible Sealants

b. Specific painted surfaces are defined as follows:

(1) Roof

(2) Shell

(3) Attachments, accessories and appurtenances

(4) Flexible Sealants

8. Upon completion of warranty remedial repairs, Contractor shall wash down and disinfect tank as originally specified. Contractor shall provide new gaskets for the manholes as needed.

9. Costs: All noted costs for Contractor's inspection and all costs for repair shall be borne by the Contractor and in figuring his bid, the Contractor shall include an appropriate amount for testing and repair as no additional allowance will be paid by the District for said inspection and repair.

May 2024 Section 01000 - 9

1.8 SAFETY AND HEALTH REQUIREMENT

A. Contractor shall submit a notarized letter signed by a principal officer of the Corporation or Company certifying the Contractor fully complies with Federal and State Regulations pertaining to the work including, but not limited to, the following. Review of Contractor’s safety plan by Engineer does not imply that District accepts responsibility for such plans or safety activities.

1. Illness Injury Prevention Program

2. Code of Safe Practice

3. Confined Space Plan

CSO/GISO

CSO

GISO

1508/3203

1509 (B)

5156/5159

4. Health and Illness Prevention GISO 3395

5. Fall Prevention Plan CSO 1671.1

6. Respiratory Protection CSO/GISO 1531/5144

7. Hazard Communication GISO 5194

8. Lead-Based Paint Compliance Plan CSO 1532

9. Rolling Scaffolds CSO 1646

10. Employee Safety Instruction CSO 1510

11. Emergency Medical Service CSO 1512

12. Dusts, Fumes, Mists, Vapors & Gases CSO 1528

B. General: Contractor assumes the responsibility to accomplish all work in a safe and prudent manner, and to conform to all applicable safety requirements, regulations and guidelines of federal, state and local regulatory agencies, as well as applicable manufacturer's printed instructions and appropriate technical bulletins and manuals.

Without in any way limiting that responsibility or assuming responsibility for safety, the District is particularly concerned that the following are strictly observed:

1. Life Saving Equipment: Contractor shall provide and require use of personal protective life saving equipment for all its personnel working in or about the project site.

2. Access Facilities: All ladders, scaffolding and rigging shall be designed for their intended uses and meet OSHA regulations. Ladders and scaffolding shall be supplied and erected as requested by Engineer to facilitate inspection and be moved by the Contractor to locations requested by the Engineer.

3. Ventilation: Contractor shall ensure there is proper ventilation, air eduction and exhausting of work space to reduce the concentration of air contaminants to a level which poses no hazard to personnel at or near the job site. Air circulation

May 2024 Section 01000 - 10 and exhausting of solvent vapors shall be continued until coatings and paints have fully cured. If conventional blast cleaning is accomplished, total containment during blast cleaning and coating and paint application operations is mandatory.

The exhaust blower or dehumidification equipment capacity shall be sufficient to maintain air changes within containment interior in accordance with OSHA, coating and paint manufacturer's recommendations and local Air Quality Management City regulations, subject to Engineer’s review.

a. Exhaust blower shall exhaust into an Engineer-reviewed structure that precludes the exhausting of paint chips or particulate matter onto the site or into the atmosphere.

b. Where ventilation is used to control hazardous exposure, all equipment shall be explosion proof, of industrial design and shall be approved by the Engineer. Household-type venting equipment will not be acceptable.

Ventilation shall reduce the concentration of air contaminant to the degree a hazard does not exist by educting air, vapors, etc from the confined space.

c. Ventilation system shall be furnished and installed by the Contractor in accordance with these specifications. The Contractor shall make modifications to the ventilation system as required by Cal/OSHA to ensure a safe working environment and complete removal of all contaminated vapors.

4. Head and Face Protection and Respiratory Devices: Equipment shall include protective helmets that shall be worn by all persons while in the vicinity of the work.

During abrasive blasting operations, nozzlemen shall wear U.S. Bureau of Mines approved positive pressure air-supplied helmets and all other persons who are exposed to blasting dust shall wear respiratory protection. If coatings are hazardous, additional protection will be worn as determined necessary by the exposure assessment of the Certified Industrial Hygienist.

a. When and where required, positive pressure air-fed hoods and/or masks shall be supplied by an air source currently certified to produce “Class D Breathing Air”. Contractor shall at all times during the work maintain onsite current documentation to substantiate the quality of the breathing air.

b. Barrier creams shall be used on any exposed areas of skin.

5. Grounding: Welding leads, all hoses and related equipment shall be grounded to prevent accumulation of charges of static electricity.

6. Illumination: Sparkproof artificial lighting shall be provided for all work in confined spaces. Light bulbs shall be guarded to prevent breakage. Lighting fixtures and flexible cords shall comply with the requirements of NFPA 70 “National Electric Code” for the atmosphere in which they will be used. 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.

May 2024 Section 01000 - 11

7. Toxicity and Explosiveness: The exterior surfaces of were noted to contain lead and zinc. The maximum allowable concentration of vapor shall be kept below the maximum safe concentration for eight-hour exposure, plus Lower Explosive Limit (L.E.L.) must be strictly maintained. All regulations related to safety of personnel and handling of such materials shall be strictly followed. Cost of handling and disposing of such materials will be borne by the Contractor.

a. Contractor's responsibility for meeting all regulations relating to toxic and hazardous materials includes, but is not limited to, obtaining all permits and EPA numbers, processing paperwork, blood testing of personnel at start and finish of project, sampling and testing of wastes, paying fees, handling and packaging of wastes at site, and delivering materials to the selected Class I dumpsite using licensed hazardous materials transporters. All regulations relating to working with heavy metals or confined spaces shall be strictly enforced. Documentation of all hazardous or toxic waste disposal will be required and a copy supplied to the District.

8. Protective Clothing: During cutting, burning, welding operations and when handling and mixing coatings and paints, workmen shall wear gloves, eye shields and other protective clothing. If working with lead, zinc or other heavy metals, regulations regarding handling of exposed clothing shall be strictly enforced.

9. Fire: Contractor shall provide appropriate fire abatement devices on site and be readily available at the job site during all operations. Prohibit any flames, welding and smoking during mixing and application of materials.

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

a. Sound barriers approved by the District shall be provided at all times to minimize disturbance to persons living or working nearby, and to the general public. Measures to be used in effecting noise suppression shall include (but not limited to) equipping all internal combustion engines with critical residential silencers (mufflers), shielding noise-producing equipment from nearest areas of human occupancy by location in such positions as to direct the greatest noise emissions away from such areas, and conducting operations in the most effective manner to minimize noise generation consistent with the prosecution of the Contract in a timely and economic manner. Whenever levels are above local ordinances or result in noise complaints from residents, they shall be adjusted as directed by the Engineer.

11. Gas and Air Monitoring: Contractor shall furnish monitoring equipment to determine the presence of oxygen deficiency or dangerous air contamination.

Continual monitoring will be required. Concentration levels will be as prescribed by

OSHA.

C. Contractor shall provide Health Department approved sanitary facilities for all Contractor

May 2024 Section 01000 - 12 personnel, as no existing facilities will be available to the Contractor. Facilities shall be maintained during the project to complete standards established by District and shall be removed prior to Contractor’s departure from the site at completion of the project.

1.9 DEHUMIDIFICATION

A. Scope: If dehumidification is required by the District's optional Bid Item, the interior of the structure shall be dehumidified continuously, 24 hours per day, 7 days per week, during the cleaning and coating operations including shifts during which no work is being accomplished and also during the final curing period, unless fewer hours or days are approved in writing by the Engineer.

1. The purpose of dehumidifying the interior of the tank during the cleaning and coating operations and during the final cure period is to nullify the adverse effects of cold and/or wet atmospheric conditions. Additionally, the dehumidification equipment will provide the necessary ventilation for the removal of solvent vapors during the coating and final cure phases.

2. Dust collectors and/or separators using approved filters are required. The contractor shall, at all times, maintain the concentration of solvent vapors in all parts of the structure 10% below the lower explosive limit (LEL).

3. Dehumidification may or may not be required and will be per the District’s direction. If required, it will per the rate listed in the bid. All bids will be tabulated with dehumidification included.

4. Cost for mobilization/demobilization for dehumidification equipment shall be figured into the unit price of the bid item.

5. Any weeks of dehumidification in addition to the number listed in the bid schedule will be at the unit price noted in the bid schedule.

B. Dehumidification equipment systems must be reviewed by the Engineer.

1. The exhaust blower for removal of dust, etc. from the interior containment shall exhaust into an Engineer-reviewed structure that precludes the exhausting of lead or zinc-laden paint chips or particulate matter onto the site or into the atmosphere.

C. Final Cure: Final cure of coating is specified in Section 09800 Subsection 3.9 FINAL

CURING OF EPOXY COATINGS.

D. General:

1. The structure shall be continuously dehumidified 24 hours per day, during blasting, coating, between coats of coating, and during the final cure period, unless fewer hours or days are approved in writing by the Engineer.

2. The Contractor shall maintain the dehumidification system at all times, including final cure period, and shall remove the ventilation and dehumidification system upon completion of the final cure period.

May 2024 Section 01000 - 13

3. The Contractor shall make modifications to the dehumidification system as directed by the Engineer to ensure a safe working environment, complete removal of all solvent vapors, and maintenance of the proper relative humidity at the concrete and steel surfaces.

4. Ducting shall be airtight and reinforced with spirally-wound wire to prevent col-lapse. The Contractor shall furnish and install an appropriate airtight connecting device between the duct and designated opening. All bends in ductwork shall have a minimum radius of 2 x ID of the ducting (i.e. 18" ID = 36" minimum radius).

5. The Contractor shall design and submit for review a dehumidification and ventilation plan. If lead coating or paint is being removed, the ventilation plan shall provide for a minimum cross-draft velocity of 100 feet per minute in the vicinity of the work area. The cross-draft velocities may be obtained with use of a portable blower or fans. If lead coating or paint is being removed, air filtration is required with HEPA PM-10 filters.

6. The Contractor shall furnish, install and maintain three (3) 3,000 cubic foot per minute circulation fans inside the structure, or as modified by the Engineer.

7. The circulation fans may be moved as necessary, but shall be placed in dead air space areas and directed toward the designated opening at all times.

8. The Contractor shall seal all structure openings, to prevent the entry of moist air detrimental to the blasting, coating, or curing process. An approved air lock entry shall be provided for ingress to and egress from the structure.

9. The area adjacent to the surface that is to be blasted and coated shall not be exposed to a relative humidity over thirty-five percent (35%) at anytime during blasting, cleaning, and coating operations.

E. Equipment:

1. The dehumidification equipment shall be a solid desiccant (not liquid, granular or loose lithium chloride) design having a single rotary desiccant bed capable of continuous operation, fully automatic, with drip-proof automatic electrical controller.

2. Dehumidification equipment operated on the structure must be capable of making two complete air changes every sixty minutes unless the 100 feet per minute cross-draft velocity requirement requires a larger volume.

3. The processed air from the dehumidification unit must maintain a relative humidity of eleven percent (11%) or less.

4. During the coating and cure phase, dehumidification units must have auxiliary heaters capable of maintaining an air temperature inside the tank of a minimum of 70 degrees F.

May 2024 Section 01000 - 14

5. Air heaters are not acceptable as substitutes for dehumidification units.

6. Air chillers, heaters, or air conditioners may be used downstream of the dehumidifiers if they are approved for use by the manufacturer of the dehumidification equipment.

PART 2 - PRODUCTS RESERVED

PART 3 - EXECUTION

3.1 COORDINATION AND MEETINGS

A. PRE-BID CONFERENCE

1. A mandatory Pre-Bid Conference for the project will be conducted by the Engineer at District office and site as noted in the Notice of Inviting Bids. The object of the Pre-Bid Conference is to acquaint bidders with existing facility and sites. The conditions and requirements of the plans and specifications shall govern over any information presented at the Pre-Bid Conference, unless amended in writing by the Engineer. All bidders must attend the Pre-Bid Conference to have their bid accepted by the District.

B. PRE-CONSTRUCTION CONFERENCE

1. A Pre-Construction Conference shall be scheduled prior to start of project. The District, Contractor and Engineer shall be present. The sequence of work will be discussed and will be mutually agreed upon to ensure that the work is accomplished and completed as stated in the Contract, and to allow for inspection and operations flexibility by District. A schedule of work to be accomplished and a list of labor, material and equipment rates for additional work will be established and maintained throughout the project. Contractor shall furnish resumes of all personnel assigned to project, and a complete set of approved submittal data for use by inspection personnel. Contractor shall have a designated representative for all projects.

2. The Contractor shall submit manufacturers' literature and Safety Data Sheets

(SDS) on all materials to be used in coating and painting operations, including, but not limited to coatings, paints, thinners, solvents and cleaning fluids. No materials will be allowed which have been stored over 60 days, or manufacturer's recommended shelf life, whichever is less. Contractor shall maintain copies of SDS's at job site at all times. Copies of all invoices showing purchased dates and delivery for all material mentioned above will be required.

END OF SECTION

May 2024 Section 01000 - 15

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May 2024 Section 02100 - 1

SECTION 02100: MOBILIZATION/DEMOBILIZATION/CLEANUP

PART 1 - GENERAL

1.1 DESCRIPTION

This Section describes the work necessary to mobilize, demobilize, and clean up the Project site.

1.2 PROJECT CONDITIONS

A. Contractor shall perform a pre-construction survey of the existing project site and staging area, including photographic and video documentation of existing conditions, for submission to the Engineer.

B. Contractor shall be wholly responsible for security of their site and laydown area, and for their plant, materials, equipment and tools.

C. Demobilization is intended to compensate the Contractor for operations including, but not limited to, those necessary: for the movement of personnel, equipment, supplies, and incidentals off the project site; for the removal of offices, temporary utilities, and other facilities from the project site, including transportation; and, for the cleanup restoration of the project site, storage yard, and staging areas.

1.3 SUBMITTALS

A. Staging and Storage Area Layout Plan

B. Pre-construction survey of the existing project site and staging area, including photographic and video documentation of existing conditions.

PART 2 - PRODUCTS

2.1 GENERAL

Provide all temporary and permanent materials, equipment, and labor required to accomplish the work as specified.

2.2 WATER

A. The Contractor shall not draw any water from a fire hydrant for use on the work without first obtaining a permit from the Owner. Contract the District for permission to use water and rental of construction water meter. The Contractor will be responsible to pay for construction water.

2.3 NOISE CONTROL FACILITIES

A. Submit to the Owner a noise abatement plan for approval at the pre-construction

May 2024 Section 02100 - 2 meeting. The plan shall show the location of noise abatement equipment and rehabilitation equipment.

3.1 CONSTRUCTION LAYOUT

A. Set up construction facilities in a neat and orderly manner within designated area at location of choice. Accomplish all required work in accordance with applicable portions of these Specifications. Confine operations to work area shown.

B. Some obstructions may not be shown. Bidders are advised to carefully inspect the existing facilities before preparing their bids. The removal and replacement of minor obstructions such as electrical conduits, water, waste piping, and similar items shall be anticipated and accomplished, even though not shown or specifically mentioned.

C. Bring major obstructions encountered that are not shown on the Drawings, or could not have been foreseen by visual inspection of the site prior to bidding, immediately to the attention of the Owner. The Owner will make a determination for proceeding with the Work.

D. The Contractor shall be responsible for verifying the condition of any existing pavement near and adjacent to the staging and storage area for use to support their construction equipment, stockpiles and materials storage. Damaged pavement, as a result of the Contractor’s use of this area, shall be restored to a new paved condition to the satisfaction of the Engineer.

3.2 CONTAMINATION PRECAUTIONS

Avoid contamination of the Work site. Do not dump waste oil, rubbish, or other similar materials on the ground.

3.3 DISPOSAL OF MATERIAL

Dispose of all fluids, solids, etc., as further described in the Specifications.

3.4 CLEANUP OF CONSTRUCTION AREAS

A. During execution of the Work, daily clean the site, adjacent properties, and public access roads and dispose of waste materials, debris, and rubbish to assure that grounds, and public and private properties are maintained free from accumulations of waste materials and rubbish. Provide containers for collection and disposal of waste materials, rubbish, and debris.

B. Upon completion of rehabilitation, remove from the site the rehabilitation and related equipment, and all debris, unused materials, temporary construction buildings, and other miscellaneous items resulting from or used in the operations.

Replace or repair any facility that has been damaged during the construction work.

Restore the site as nearly as possible to its original condition.

May 2024 Section 02100 - 3

3.5 NOISE CONTROL

A. Demonstrate compliance with the noise control requirements. Monitor noise levels at least once daily, and at the request of the Owner, during a time when on-site equipment is in use and noise levels are expected to be the highest. Measure noise levels at the perimeter fence nearest to the tank being rehabilitated.

B. If, at any time, the noise limits are exceeded, take immediate corrective action through equipment modifications, addition of noise abatement equipment or changes in operating procedures. Monitor noise levels to demonstrate compliance.

PART 4 - PAYMENT

4.1 GENERAL

A. Payment for the Work in this Section shall be included as part of the lump sum or unit prices bid for which such Work is appurtenant thereto, and no additional payment will be made specifically for the Work in this Section.

B. Any extension of Contract time that may be granted by the Owner will not of itself constitute a claim for additional payment for the work under this Section.

END OF SECTION

May 2024 Section 02100 - 4

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May 2024 Section 09800 - 1

SECTION 09800 - TANK COATING AND PAINTING

PART 1 - GENERAL

1.1 PURPOSE

The purpose of this specification is to establish methods and procedures for coating, painting, dehumidification and handling of hazardous and non-hazardous materials/wastes.

1.2 CONTRACTOR

The contractor shall be a licensed Painting and Decorating Contractor in the State of California (C-33 Classification). He shall have a minimum of five (5) years practical experience and successful history in the application of specified products to surfaces of steel water storage tank. Upon request, he shall substantiate this requirement by furnishing a written list of references.

1.3 DEFINITIONS

A. “Coating” refers to protective materials used or applied on interior surfaces.

B. “Paint” refers to protective materials used or applied on exterior surfaces.

C. “Coat” refers to paint applied in a single or multiple pass application to form an evenly distributed film when dry. Designations for “coats” are primer or first coat, intermediate or second coat, and finish coat, and any coats applied beyond the designated coats.

1.4 QUALITY ASSURANCE

A. Surface Preparation: Surface preparation will be based upon comparison with: “Pictorial Surface Preparation Standards for Painting Steel Surfaces”, SSPC-Vis 1, ASTM Designation D2200 and as described below. Anchor profile for prepared surfaces shall be measured by using a non-destructive instrument such as a K-T Surface Profile Comparator, digital surface profile gauge or Testex Press-O-Film System. Temperature and dewpoint requirements noted in 1.4 B. herein shall apply to all surface preparation operations, except low and high temperature limits and operation of dehumidification equipment shall be determined at the Pre-Construction Conference.

B. Application: No coating shall be applied under the following conditions:

1. When the surrounding air temperature or the temperature of the surface to be coated or painted is below 55 degrees F for epoxy coatings, below 45 degrees F for epoxy low temperature cure coatings, or below 40 degrees F for urethane paint, or above 125 degrees F for all materials; or in accordance with the data sheets.

2. To wet or damp surfaces or in rain, fog or mist;

3. When the surface temperature is less than 5 degrees F above the dewpoint.

4. When it is expected the air temperature will drop below 55 degrees F for epoxy

May 2024 Section 09800 - 2 coating, below 45 degrees F for epoxy low temperature cure coatings, or 40 degrees F for urethane paints, or surface temperature is expected to be less than 5 degrees F above the dewpoint within two hours after application of coatings or paints.

a. Dewpoint shall be measured by use of an instrument such as a sling psychrometer in conjunction with U.S. Department of Commerce Weather Bureau Psychrometric Tables or equivalent. Dehumidification equipment must run continuously during all phases of contract, except disinfection phase.

b. If above conditions are prevalent, coating and paint application shall be delayed or postponed until conditions are favorable. The day's application shall be completed in time to permit the film sufficient drying time prior to damage by atmospheric conditions.

C. Overspray and Dust Control: The Contractor shall conduct all operations so as to confine abrasive blasting debris and coating and paint overspray to within the bounds of the site.

The Contractor shall take all precautions necessary to prevent adverse off-site consequences of blast cleaning or application operations. Any complaints received by the District relating to any such potential off-site problems will be immediately delivered to the Contractor-assigned job site representative. The Contractor shall immediately halt blast cleaning or application work and shall take whatever corrective action is required to mitigate any such problems. All costs associated with protection of off-site properties and/or correction of damage to property as a result of blast cleaning or application operations shall be borne directly by the Contractor at no additional expense to the District.

1. District approval of Contractor's blast cleaning and overspray prevention procedures and Engineer's presence on project does not free Contractor from responsibility for compliance. Daily approval of procedures will be required prior to start of blast cleaning or spray operations.

D. Inspection and Checking: The District will provide and utilize the services of an independent professional coating inspection agent who will be District’s Coating Inspector. Contractor will furnish inspection devices and test equipment in good working condition and equipment shall be operated by, or in the presences of the inspector. Procedures or practices not specifically defined herein may be utilized provided they meet recognized and accepted professional standards and are acceptable to District’s Coating Inspector. The District’s Engineer’s decisions shall be final as to interpretation and/or conflict between any of the reference specifications and standards contained herein.

1. The District’s Coating Inspector will perform continuous inspection on all phases of the surface preparation, abrasive blast cleaning, and application of the coating systems. All surfaces will be inspected by District’s Coating Inspector prior to each application of coating materials. Coating materials applied without the prior inspection of District’s Coating Inspector shall be removed and reapplied at the expense of the Contractor.

2. District’s Coating Inspector will perform such tests as are required to ensure compliance with all phases of the surface preparation, abrasive blast cleaning, and application of the coating systems. Test equipment shall include but not be limited to the following: SSPC surface preparation standards; surface profile comparator;

May 2024 Section 09800 - 3 test tape; micrometer; abrasive sieve test; ultraviolet lamp; mirror; certified thickness calibration plates and magnetic type dry film thickness gauge. Accuracy of inspection equipment will be verified by District’s Coating Inspector in the presence of the Contractor to verify its accuracy prior to use.

3. Notify District’s Coating Inspector 14 days in advance of shop and field-apply operations involving abrasive blast cleaning and coating applications.

4. District’s Coating Inspector will determine the degree of cleanliness and surface profile of the shop and field blast cleaned surfaces. Additional blast cleaning of non-conforming areas shall be accomplished until all areas conform to the cleanliness and profile specified.

5. District’s Coating Inspector will totally inspect each coat of primer, intermediate, and finish coating to determine the thickness and integrity. Each coat applied will be checked and deficiencies marked. After observing specified recoat time, apply additional coating materials over areas not having the specified minimum dry-film thickness and areas having any holidays or pinholes. After correction of deficiencies, District’s coating Inspector will re-inspect those areas to determine the acceptability of the additional coating. Each coat applied must be 100% to the satisfaction of District’s Coating Inspector prior to subsequent coats being applied.

E. Inspection Facilities: The Contractor shall provide District’s Coating Inspector with facilities for inspection including, but not limited to the following:

1. Furnish as determined necessary by District’s Coating Inspector all safety equipment and devices during abrasive blast cleaning and coating operations. Provide helmet with continuous fresh air supply for observation during cleaning operations.

2. Furnish illumination and the manpower to move the lights, whenever required by the

District’s Coating Inspector. Provide additional lights and supports sufficient to illuminate all areas to be inspected. District’s Coating Inspector will determine the level of illumination required for inspection purposes.

F. Temporary ladders and scaffolding shall be erected and moved to the locations requested by District’s Coating Inspector.

G. Thickness Testing: Thickness of coatings and paints shall be tested with a non-destructive film thickness gauge. An instrument such as a Tooke Gage should be used if a destructive tester is deemed necessary. Testing shall be accomplished in conformance to SSPC-PA 2, “Measurement of Dry Paint Thickness with Magnetic Gages” except as modified hereinafter.

1. Flat coated or painted surfaces shall be tested in conformance to SSPC-PA2.

2. Structural members, piping and other irregular surfaces shall be tested with frequency and locations as directed by the Engineer.

H. Holiday Testing: Coating integrity of ALL interior coated surfaces shall be tested with an approved inspection device. All pinholes shall be marked, repaired in accordance with the manufacturer's printed recommendations and retested. No pinholes or other irregularities

May 2024 Section 09800 - 4 will be permitted in the final coating.

I. Inspection Devices: Contractor will furnish, until final acceptance of coatings and paints, inspection devices in good working condition for detection of holidays and measurement of dry film thickness. They shall also furnish U.S. Department of Commerce, National Bureau of Standards certified thickness calibration plates to test accuracy of thickness gauges. Dry film thickness gauge holiday detectors shall be available at all times until final acceptance of application. Inspection devices shall be operated by, or in the presence of the Engineer with location and frequency basis determined by the Engineer.

J. Acceptable Inspection Devices: Acceptable devices for ferrous metal surfaces include, but are not limited to, Tinker and Rasor Models AP and AP-W holiday detectors equipped with a wire brush electrode supplied by the manufacturer, and “Inspector”, or “Positest”, or “Positector” or “Quanix” units for dry film thickness gauging. Inspection devices shall be operated in accordance with these specifications and the manufacturer's instructions.

PART 2 - PRODUCTS

2.1 GENERAL

A. Materials specified are those which have been evaluated for the specific service. Products of International, Devoe Coatings, and Tnemec Company, Inc. are listed to establish a standard of quality for the project. Standard products of manufacturers other than those specified, will be accepted when it is proved to the satisfaction of the Engineer they are equal in composition, durability, usefulness and convenience for the purpose intended.

Substitutions will be considered provided the following minimum conditions are met:

1. The proposed coating or paint system shall have a dry film thickness equal to or greater than that of the specified system.

2. The proposed coating or paint system shall employ an equal or greater number of separate coats.

3. The proposed coating or paint system shall employ coatings or paints of the same generic type.

4. All requests for substitution shall carry full descriptive literature and directions for application, along with complete information on generic type, non-volatile content by volume and a list of 10 similar projects, all at least three years old, where the products have been applied to similar exposure.

5. The District requires that the Contractor provide certified laboratory data sheets showing the results of complete spectrographic and durability tests accomplished on the proposed substitute.