Tank_Replacement_spec_100305.pdf

Specifications for

FOREST-WIDE WATER TANK REPLACEMENTS

March 5, 2010 ii iii

DIVISION 1 – GENERAL REQUIREMENTS

TABLE OF CONTENTS

01010 - SCOPE OF WORK

1.1 – Definitions

1.2 – Description

1.3 – Location and Conditions

1.4 – Schedule

1.5 – Contract Administration

1.6 – Quality of Work

1.7 – Codes and Standards

1.8 – Special Construction Requirements

1.9 – Contract Closeout

01020 – MEASUREMENT & PAYMENT

1.1 – Measurement & Payment

1.2 – Determination of Quantities

01505 - MOBILIZATION

1.1 - Summary

4.1 – Method of Measurement

DIVISION 2 – SITE WORK

02222 – MINOR DEMOLITION

1.1 – Summary

1.2 – Quality Assurance

2.1 – Demolition

DIVISION 9 – FINISHES

09910 – LEAD PAINT CONTAINMENT, REMOVAL & DISPOSAL

1.1 - Summary

1.2 – Submittals

1.3 – Quality Assurance

3.1 – Removal and Disposal

4.1 – Method of Measurement & Basis of Payment iv

DIVISION 13 – SPECIAL CONSTRUCTION

13612 – GLASS-FUSED-TO-STEEL BOLTED WATER STORAGE TANKS

1.1 – Description

1.2 – Submittals

1.3 – Qualifications of Tank and Supplier

1.4 – Quality Assurance

1.5 – Guarantee

2.1 – Design Criteria

2.2 – Design Standards

2.3 – Design Loads

2.4 – Materials Specifications

2.5 – Glass-Coating Specification

3.1 – Erection

3.2 – Hydrostatic Field Testing

3.3 – Disinfection

4.1 – Method of Measurement & Basis of Payment

DIVISION 1 – GENERAL REQUIREMENTS

DIVISION 1

01010 - SCOPE OF WORK

PART 1 – GENERAL

1.1 – Definitions

Contractor – the successful bidder who is awarded the contract.

Government – the Contracting Officer (CO) or designated Contracting Officer’s Representative (COR) of the Coronado National Forest.

Contractor shall furnish all materials, equipment, connections to site piping, transportation, labor, supervision, and other associated work needed to complete work according to the specifications.

1.2 – Description

Contractor shall remove and legally dispose of the existing water storage tanks, and install six (6) new glass-fused-to-steel potable water tanks at six (6) specified locations.

Work will take place at several locations throughout the Coronado National Forest:

Palisades Administrative Site (T12S R16E S9), Peña Blanca Lake (T23S R12E S26), Rigg’s Flat Recreation Area (T8S R23E S26), Rose Canyon Campground (T12S R16E S10), Shower Point Group Site (T12S R16E S8) and Spencer Canyon Campground (T12S R16E S6).

1.3 – Location and Conditions

Electricity is not available for construction use. If needed, the Contractor must provide a generator or other power source for construction activities.

It will be the Contractor’s responsibility to familiarize themselves with the existing conditions and notify the Government of any discrepancies shown in these documents.

Details for each tank replacement site are as follows:

A. Palisades Administrative Site, Mount Lemmon, Arizona

1. Removing and replacing the existing water tank with a 35,000-gallon glass-fused-to-steel low-maintenance, expandable, bolted tank. The existing tank pad will be re-used for the new tank. The tank will be placed on an open-graded gravel/sand pad within a steel ring to be constructed with this contract. Maximum sidewall height for tank is ten (10) feet.

2. Installing an overflow pipe and drain.

3. Installing a brass or stainless steel NSF-certified shut-off float valve for both inlets (Tunnel Spring and Loma Linda supply line), accessible without entering the tank

4. Installing a brass or stainless steel ball valve and concrete valve box with steel lid at outlet.

5. Installing an inflow meter.

6. Installing a liquid level indicator.

7. Installing new inlet and outlet piping to connect the existing site water system.

B. Peña Blanca Lake, Nogales, Arizona

1. Removing and replacing the existing water tanks with a 10,000-gallon glass-fused-to-steel low-maintenance, expandable, bolted tank. The existing tank pad will be re-used for the new tank. The tank will be placed on an open-graded gravel/sand pad within a steel ring to be constructed with this contract.

2. Installing an overflow pipe and drain.

3. Installing new brass or stainless steel ball valve and concrete valve box with steel lid at inlet and outlet.

4. Installing a liquid level indicator.

5. Installing new inlet and outlet piping to connect the existing site water system.

C. Rigg’s Flat, Mount Graham, Arizona

1. Removing and replacing the existing water tank with a 20,000-gallon glass-fused-to-steel low-maintenance, expandable, bolted tank. The existing tank pad will be re-used for the new tank. The tank will be placed on an open-graded gravel/sand pad within a steel ring to be constructed with this contract. The Contractor may be required, at his own expense, to improve a 700-foot access road to allow his equipment to reach the tank site.

2. Installing an overflow pipe and drain.

3. Installing a brass or stainless steel NSF-certified shut-off float valve.

4. Installing new brass or stainless steel ball valve and concrete valve box with steel lid at inlet and outlet, accessible without entering the tank.

5. Installing a liquid level indicator.

6. Installing new inlet and outlet piping to connect the existing site water system.

D. Rose Canyon Campground, Mount Lemmon, Arizona

1. Removing and replacing the existing tank with a new 20,000-gallon glass-fused-to-steel low-maintenance, expandable, bolted tank. The existing tank pad will be re-used for the new tank. The tank will be placed on an open-graded gravel/sand pad within a steel ring to be constructed with this contract. The Contractor may be required, at his own expense, to improve a ¼-mile access road to allow his equipment to reach the tank site.

2. Installing an overflow pipe and drain.

3. Installing a brass or stainless steel NSF-certified shut-off float valve, accessible without entering the tank.

4. Installing an inflow meter.

5. Installing new brass or stainless steel ball valve and concrete valve box with steel lid at inlet and outlet.

6. Installing a liquid level indicator.

7. Installing new inlet and outlet piping to connect the existing site water system.

E. Showers Point Group Site, Mount Lemmon, Arizona

1. Removing and replacing the existing tank with a new 10,000-gallon glass-fused-to-steel low-maintenance, expandable, bolted tank. The existing tank pad will be re-used for the new tank. The tank will be placed on an open-graded gravel/sand pad within a steel ring to be constructed with this contract.

2. Installing an overflow pipe and drain.

3. Installing a brass or stainless steel NSF-certified shut-off float valve, accessible without entering the tank.

4. Installing an inflow meter.

5. Installing new brass or stainless steel ball valve and concrete valve box with steel lid at inlet and outlet.

6. Installing a liquid level indicator.

7. Installing new inlet and outlet piping to connect the existing site water system.

F. Spencer Canyon Campground, Mount Lemmon, Arizona

1. Relocating the existing tank to the Sollers Point Helibase (see attached map).

Remove the existing 20,000-gallon tank at the Sollers Point location, and install tank relocated from Spencer campground; re-grade pad and extend tank overflow to creek. The Contractor may be required, at his own expense, to improve a ¼-mile access road at Sollers to allow his equipment to reach the tank site.

2. Replacing the existing tank with a new 35,000-gallon glass-fused-to-steel low-maintenance, expandable, bolted tank. The existing tank pad will be re-used for the new tank. The tank will be placed on open-graded gravel/sand pad within a steel ring to be constructed with this contract. The tank shall have 3 separate outlets and valve assemblies, with internal standpipes at heights that equally divide the tank into thirds. The outlet pipes/valves shall be designed to prevent loss of the full volume of the tank should a break occur in the site piping downstream.

3. Installing an overflow pipe and drain.

4. Installing a brass or stainless steel NSF-certified shut-off float valve, accessible without entering the tank.

5. Installing an inflow meter.

6. Installing new brass or stainless steel ball valve and concrete valve box with steel lid at inlet and outlet. Valves to be color-coded or otherwise coordinated with the various outlet standpipes installed in the tank and indicated on the liquid level indicator.

7. Installing a liquid level indicator. The indicator shall denote the level of each outlet standpipe for easy reference from the general visual inspection of the tank, and shall be color-coded or otherwise coordinated with the valve that corresponds to each outlet.

8. Installing new inlet and outlet piping to connect the existing site water system.

A pre-work meeting will be held at each site for clarification of the project.

1.4 – Schedule

A schedule for all work must be submitted to and approved by the CO prior to start of construction.

The Contractor shall notify the CO three days in advance of any construction work.

Estimated start work date is May 2010.

All work shall be completed within 9 months of award.

The Contractor shall be fully responsible for seeing that construction activities conform to the specifications and provisions of this contract. The CO will provide timely reviews as requested by the Contractor and may periodically review work at any time.

1.5 – Contract Administration

Construction quality control shall include supplying all the personnel, equipment, and documentation necessary to ensure that construction is completed in compliance with the specifications and provisions of the contract.

The products listed in the specifications are preferred products chosen for water system compatibility and quality. The Government’s selection of a glass-fused-to-steel tank system is based on specific site criteria, maintenance concerns, and system functionality.

1.6 – Quality of Work

Codes and standards of the following associations and listed publications will become part of this contract:

1.7 – Codes and Standards

1. Arizona Department of Environmental Quality (ADEQ)

2. Arizona Department of Water Resources (ADWR)

3. American Water Works Association (AWWA)

4. Occupational Health and Safety Administration (OSHA) standards

5. American Society for Testing and Materials (ASTM)

6. American National Standards Institute (ANSI)

7. Society of Automotive Engineers (SAE)

8. Steel Structures Painting Council (SSPC)

9. International Organization for Standardization (ISO)

10. National Sanitation Foundation (NSF)

All materials, workmanship, and designs shall meet specified requirements of the standards referenced in this section and other local or state codes, related to this type of work, whichever is more stringent.

Upon completion of the project, all demolished improvements and other construction materials shall be removed from United States Forest Service (USFS) land and disposed of in accordance with State and County standards.

1.8 – Special Construction Requirements

The Contractor may use the on-site vault toilet facilities during construction.

All site features to remain shall be protected from damage during the project. Any damage to site features shall be repaired to their original condition at the cost of the Contractor.

No live trees are to be cut down without written permission of the CO. Tree limbs may be trimmed as necessary.

Sanitation/Garbage: No garbage service is available for Contractor use. The Contractor shall keep the construction site free of loose garbage at all times.

Construction Access and Protection: The Contractor shall be responsible for securing the project area from the public. This includes providing the necessary security for protection of the Contractor's materials, equipment, tools and work until final acceptance by the CO.

Equipment and Material Storage

The Contractor will be able to utilize Sabino Warehouse as a delivery point for completed tank panels, allowing installation to proceed as needed. The warehouse is located at 5700 N. Sabino Canyon Road in Tucson, AZ. Phone (520) 749-8700 24 hours prior to delivery during business hours only. Delivery will only be accepted from 8:00 am to 4:00 pm on weekdays. The supplier shall unload all items at the Forest Service Warehouse in the location specified by the Forest Service. Contractor shall supply all unloading equipment and labor.

: The Contractor shall obtain permission from the Contracting Officer for equipment and material storage, and for other areas needed for construction.

The Contractor shall be responsible for obtaining all ADEQ permits need to install the water facilities outlined in these specifications, including approvals to construct and operate, as appropriate.

Restore all site improvements, landscaping, and other items damaged by construction operations to the satisfaction of the CO at no additional expense to the Government.

1.9 – Contract Closeout

*** END OF SPECIFICATION 01010 ***

01020 – MEASUREMENT & PAYMENT

Measurement and payment for contract work will be made only for and under those pay items included in the SCHEDULE OF ITEMS. All other work and materials will be considered incidental to the completion of the items shown and no separate payment will be made.

1.1 – Measurement & Payment

The quantity of items is as determined in the SCHEDULE OF ITEMS.

1.2 – Determination of Quantities

*** END OF SPECIFICATION 01020 ***

01505 - MOBILIZATION

This section Includes preparatory work and operations, including those necessary to the movement of personnel, equipment, supplies and incidentals to the project site; and for other work and operations which must be performed or costs incurred prior to beginning work on the various items on the project installation sites. This specification does not include moves between project sites.

1.1 - Summary

PART 2: PRODUCTS

(There are no applicable requirements.)

PART 3: EXECUTION

(There are no applicable requirements.)

PART 4: MEASUREMENT AND PAYMENT

The Contractor can request payment for performance and payment bonds upon receipt of evidence of full payment to the surety. When separate payment for bonding cost is made, the bonding cost will be subtracted from the total contract amount for the pay item, and the balance paid in accordance with the progress payment scheduled outlined below.

4.1 – Method of Measurement

Any bonding costs in excess of the total contract amount of this pay item will be paid under one or more other pay items under this contract as determined by the CO. Under no circumstances will the total amount of this contract be increased as a result of bonding costs exceeding the total contract amount of this pay item.

Progress payments will be made as follows:

A. When 5% of the original Contract amount is earned from other bid items, 50% of the amount bid for mobilization or 5% of the original Contract amount, whichever is lesser, will be paid.

B. When 10% of the original Contract amount is earned from other bid items, 100% of the amount bid for mobilization or 10% of the original Contract amount, whichever is lesser, will be paid.

C. Upon completion of work for the project, payment of the amount bid for mobilization in excess of 10% of the original Contract amount, will be paid.

D. The total sum of all payments shall not exceed the original Contract amount bid for mobilization, regardless of the fact that the Contractor may have shut down the work on the project or moved equipment away from the project and then back again.

***END OF SPECIFICATION 01505***

***END OF DIVISION 1***

DIVISION 2 – SITE WORK

DIVISION 2

02222 – MINOR DEMOLITION

Section Includes: The removal and disposal of the existing water storage tanks, rings, fill and associated existing piping and accouterments.

1.1 – Summary

Regulations: Comply with federal, state and local hauling disposal regulations and manifest requirements.

1.2 – Quality Assurance

PART 2 – EXECUTION

All existing water storage tanks shall be removed as noted. The removed storage tanks shall be disposed of properly in a local landfill or by other legal method approved by the government.

2.1 – Demolition

PART 3 – METHOD OF MEASUREMENT & BASIS OF PAYMENT

The work described in this section will be measured by lump sum. Payment will be made once the government receives the manifest from the Contractor showing proper disposal of removed tanks.

***END OF SPECIFICATION 02222***

*** END DIVISION 2 ***

DIVISION 9 – FINISHES

DIVISION 9

09910 – LEAD PAINT CONTAINMENT, REMOVAL & DISPOSAL

This section includes the work of this section consists of the containment, collection, temporary storage, transportation and the proper disposal of the contaminated debris of steel water tanks coated with lead-based paint (LBP).

1.1 - Summary

A copy of a Work Plan and a Site Health and Safety Plan shall also be submitted to the Government/Forest service prior to commencement of abatement activities.

1.2 – Submittals

The Contractor shall show proof of certification in compliance with EPA to engage in lead-based paint removal activities.

The Contractor shall submit for (COR) review and acceptance, within 5 business days prior to the disposal all of the following that are applicable:

1. Contractor shall submit documentation from a permitted Hazardous Waste Facility, showing that the facility has agreed to accept the waste generated by the work; is authorized to accept the waste under the laws of the State of residence;

has the required capacity to treat and dispose of the material; and will provide or ensure the ultimate disposal method indicated on Uniform Hazardous Waste Manifest.

2. Contractor shall submit documentation from a licensed scrap metal dealer, stating that the facility will accept coated metal containing lead, and that the dealer will recycle this material. This may be in the form of a letter from the company on their letterhead. In addition, Contractor shall submit a Bill of Lading for the recycled material.

3. Contractor shall submit a copy of the hazardous waste manifest signed by the transporter and the Treatment, Storage and Disposal (TSD) facility accepting the waste.

Contractor shall completely remove all contaminated debris generated, from Government property and properly dispose.

1.3 – Quality Assurance

PART 2 – PRODUCTS

(There are no applicable requirements)

PART 3 – EXECUTION

The Contractor is responsible for determining the specific work methods and procedures to be utilized for removal of the lead-based painted steel tanks. All work methods and procedures shall be in accordance with all applicable Federal, State, and Local laws and/or regulations.

3.1 – Removal and Disposal

The Contractor shall take reasonable and appropriate precautions to protect the public from the inhalation or ingestion of dust or debris from the operations, and is responsible for the clean-up of all spills of waste at no additional cost to the Government.

The Contractor shall use procedures and equipment required to limit occupational and environmental exposure to lead when LBP is removed in accordance with 29 CFR 1926.62 and WAC 296-155-176, except as specified herein. Contractor shall provide all labor, materials, special protective clothing, tools, equipment, services, testing, supervision and incidentals necessary to perform work of lead paint abatement in accordance with Federal, State, and local laws and/or regulations and the latest guidelines published by HUD, OSHA and the EPA.

Work and work practices are subject to inspection by the Contracting Officer or regulatory personnel.

Analysis results indicate paint lead levels are as follows:

1. Palisades Tank: 55 mg/kg

2. Spencer/Ponderosa Tank: 26,000 mg/kg

3. Shower’s Point Tank: assumed to contain lead paint

4. Pena Blanca: assumed to contain lead paint

5. Rose Canyon: assumed to contain lead paint

6. Sollers Tank: assumed to contain lead paint

A ground barrier shall be placed a minimum of 10 feet around the perimeter of the structure to ensure that ground near and around the tank shall not come in contact with contaminated debris, thus ensuring that the soil remains free of contamination.

Contractor shall ensure that work area is clean of hazardous waste debris at the close of business each day.

Contractor shall collect all existing surface contaminated debris and removal debris and place it in proper hazardous waste storage containers to prevent release of dust or debris into the air while transporting to appropriate disposal site. Contractor-provided hazardous waste disposal containers shall be in accordance with 49 CFR 173. Dispose of removed paint chips and dust as a hazardous waste in compliance with Environmental Protection Agency (EPA), Federal, State, and local requirements including but not limited to Washington Dangerous Waste Regulations WAC 173-303.

Contractor shall adhere to the following for disposal of all material deemed hazardous waste:

1. Collect, manage, and dispose of lead-containing waste, scrap, debris, bags, containers, equipment, and lead-contaminated clothing which may produce airborne concentrations of lead particles as specified in this section.

2. Coordinate delivery of the hazardous waste to the hazardous waste disposal facility with the transporter and the disposal facility itself.

3. The contractor shall transport all hazardous waste off the project site. The waste must be transported by a hazardous waste transporter permitted by the Washington Department of Ecology in accordance with WAC 173-303-240. The transporter contractor shall prepare the hazardous waste manifest and lead disposal restriction notification required by WAC 173-303-180. The Contracting Officer must receive a copy of the lead disposal restriction notification and hazardous waste manifest signed by the transporter before the waste is shipped off-site.

Appropriate and required hazardous waste manifests shall be utilized by the Contractor.

Contractor shall provide a copy of the hazardous waste manifest signed by the designated hazardous waste disposal facility to the Contracting Officer within 30 days of shipment of the waste. Submit written evidence that the solid waste was properly disposed of. A copy of the disposal certificate, such as a weight ticket from the landfill, must be provided to the Contracting Officer.

The Contractor shall comply with all applicable regulations even if the regulation is not specifically referenced herein. If a Federal, State, or Local regulation is more restrictive than the requirements of this specification, the more restrictive requirements shall prevail.

PART 4 – MEASUREMENT AND PAYMENT

The work described in this section will be measured for and paid for on a lump sum basis and will be considered complete when all the contaminated debris is properly disposed of and confirmation samples test negative for contamination.

4.1 – Method of Measurement & Basis of Payment

***END OF SPECIFICATION 09910***

*** END DIVISION 9 ***

DIVISION 13 – SPECIAL CONSTRUCTION

DIVISION 13

13612 – GLASS-FUSED-TO-STEEL BOLTED WATER STORAGE TANKS

This section includes the furnishing and installing of a glass-fused-to-steel bolted water storage tank, including a tank foundation and any tank accessories specified in the contract documents. The scope of work includes all labor, materials, connections to site piping, and equipment required to complete tank installation.

1.1 – Description

A. Submit three (3) copies of supplier’s product information for glass-fused-to-steel tanks and all associated appurtenances to the government.

1.2 – Submittals

B. Samples: Submit sample of glass-fused-to-steel material and color palette available.

C. Construction shall be governed by the Contractor’s plans, drawings and specifications showing general dimensions, volume and construction details, after written approval by the Government of submittal erection drawings prepared by the tank manufacturer. There shall be no deviation from the plans, drawings and specifications, except upon written order or approval from the Government.

D. The Contractor is required to furnish, for the review and approval by the Government, three (3) sets of complete specifications and construction drawings for all work not shown in complete detail on the bidding drawings. A complete set of structural calculations shall be provided for the tank structure and foundation. All such submissions shall be stamped by a Registered Professional Engineer licensed in the State of Arizona as well as by a professional engineer employed by the tank manufacturer.

E. When approved, two sets of such prints and submittal information will be returned to the Contractor marked "APPROVED FOR CONSTRUCTION" and these drawings will then govern the scope of work detailed thereon. The approval by the Government of the tank supplier's drawings shall be an approval relating only to their general conformity with the bidding drawings and specifications and shall not guarantee detailed dimensions and quantities, which remains the Contractor’s responsibility.

F. The tank manufacturer’s standard published warranty shall be included with submittal information.

G. The Contractor shall submit the tank manufacturer’s standard Operation and Maintenance Manual upon receipt of approved drawings.

A. The Government has selected a factory-applied glass-fused-to-steel bolted tank construction for its facilities based on specific criteria, construction methods, and resistance to internal and external tank corrosion.

1.3 – Qualifications of Tank and Supplier

B. Interested Contractors and glass-fused-to-steel manufacturers shall provide a list of five (5) installed and operating tank projects to demonstrate their expertise, complete with owners contact information and phone number.

C. Demonstrated adherence to the standards of design, fabrication, erection, product quality, and long-term performance established in this specification will be required by the Government.

A. Failure Criteria, not limited to the following:

1.4 – Quality Assurance

1. Chipping or flaking of tank coating.

2. Rusting of tank coating, hardware or accessories.

3. Joint leaking.

B. Upon completion of the tank, provide the COR with a written certification that the tank has been designed, fabricated, erected, and tested in accordance with the manufacturer’s recommendations and with the requirements of ANSE/AWWA D103, and is suitable for potable water storage.

C. Provide the COR a certification from the manufacturer of the protective coating material, that the material is non-toxic, and will not impart any taste or odor to the water.

The tank manufacturer shall furnish a guarantee-warranty in writing against a defective tank material and workmanship for 5 years from date of acceptance. The tank manufacturer shall further warrant that the glass-coated surfaces of the tank will not corrode under normal and proper use for a period of 10 years after the tank is properly installed by the Contractor. Guarantee-warranty shall include repairing, if necessary, to maintain tank in a watertight condition.

1.5 – Guarantee

PART 2 – PRODUCTS

A.

2.1 – Design Criteria

Tank Size

B.

: Nominal diameter equal to 14 to 27 feet; Nominal sidewall height (to roof eave) can be variable to accommodate desired minimum volumes, with the exception of the Palisade tank, which is limited to 10 feet in sidewall height. Please note that the Pena Blanca tank will be expanded substantially with future development.

Capacity

1. Rigg’s Flat: 20,000 gallons

: Tank minimal nominal capacities are as detailed below:

2. Pena Blanca: 10,000 gallons

3. Palisade: 35,000 gallons

4. Spencer Tank: 35,000 gallons

5. Shower Point: 10,000 gallons

6. Rose Canyon: 20,000 gallons

C. Floor Elevation: The finished floor elevation for all tanks shall be as field-set by the Government.

A. The tank sheet materials, design, fabrication and erection of the bolt-together sectional steel tank shall conform to the AWWA Standard for "Factory-Coated Bolted Steel Tanks for Water Storage"- ANSI/AWWA D103, latest revision.

2.2 – Design Standards

B. The tank coating system shall conform to Section 10.4 of ANSI/AWWA D103, latest revision.

C. All materials furnished by the tank manufacturer which come in contact with the potable water stored in the tank must be listed and certified by National Sanitation Foundation (NSF) and shall comply with ANSI/NSF Additives Standard No. 61.

D. The tank manufacturer shall hold ISO 9001:2000 certification, which states the requirements to provide a quality product that meets all applicable customer and regulatory requirements.

E. The tank manufacturer shall provide written documentation of an annual quality inspection of their glass-fused-to-steel bolted tank factory.

A. Specific Gravity: 1.0

2.3 – Design Loads

B. Freeboard: 12 inches

C. Wind Velocity (per AWWA D103): 100 mph

D. Allowable Soil Bearing Capacity: 2000 pounds per square foot (psf)

E. Roof Snow Load: 30 psf

F. Earthquake Seismic Zone: 2B

A.

2.4 – Materials Specifications

1. All sheets shall be produced in the United States of America.

Plates and Sheets

2. Plates and sheets used in the construction of the tank shell, tank roof and tank floor shall comply with the minimum standards of AWWA D103, latest edition.

3. Design requirements for mild strength steel shall be ASTM A1011 Grade 30 with maximum allowable tensile stress of 14,566 pounds per square inch (psi).

4. Design requirements for high strength steel shall be ASTM A1011 Grade 50 with maximum allowable tensile stress of 26,000 psi.

5. The annealing effect created from the glass coated firing process shall be considered in determining ultimate steel strength.

B. Rolled Structural Shapes

C.

: All material shall comply with the minimum standards of ASTM A36 or ASTM A992.

Exterior Steel

D.

: All non glass-coated or piping steel on the exterior shall be hot dipped galvanized steel.

1. Bolts used in tank lap joints shall be 1/2" - 13 UNC-2A rolled threads with hot dipped galvanized coating and shall meet the minimum requirements of AWWA D103.

Bolt Fasteners

2. Bolt Material

a. SAE J429 Grade 2 ( 1" bolt length)

i. Tensile Strength: 74,000 psi minimum.

ii. Proof Load: 55,000 psi minimum.

iii. Allowable shear stress with threads excluded from the shear plane:

18,163 psi minimum.

b. SAE J429 Grade 5 ( 1-1/4" bolt length)

i. Tensile Strength: 120,000 psi minimum.

ii. Proof Load: 85,000 psi minimum.

iii. Allowable shear stress with threads excluded from the shear plane:

29,454 psi minimum.

c. SAE J429 Grade 8 (> 1-1/4" bolt length)

i. Tensile Strength: 150,000 psi minimum.

ii. Proof Load: 120,000 psi minimum.

iii. Allowable shear stress with threads excluded from the shear plane:

36,818 psi minimum.

d. Bolt Finish - Zinc, mechanically deposited; 2.0 mils (0.002 inches) minimum under bolt head, on shank and threads.

e. Bolt Head Encapsulation

i. High impact polypropylene copolymer encapsulation of entire bolt head up to the splines on the shank.

ii. Resin shall be stabilized with an ultraviolet light resistant material such that the color shall appear black.

iii. The bolt head encapsulation shall be certified to meet the ANSI/NSF Standard 61 for indirect additives.

f. All bolts on the vertical tank wall shall be installed such that the head portion is located inside the tank, and the washer and the nut are on the exterior.

g. All lap joints shall be properly selected such that threaded portions of the bolts will not be exposed to the “shear plane” between tank sheets.

h. Bolt lengths shall be sized to achieve a neat and uniform appearance.

Excessive threads extending beyond the nut after torquing will not be permitted.

i. All lap joints shall include a minimum of 4 splines on the underside of the bolt head at the shank in order to resist rotation during torque.

E.

1. The lap joint sealant shall be a one component, moisture cured, polyurethane compound. The sealant shall be suitable for contact with potable water and shall be certified to meet ANSI/NSF Additives Standard 61 for indirect additives.

Sealants

2. The sealant shall be used to seal lap joints, bolt connections, sheet edges and edge fillets for sheet notches and starter sheets. The sealant shall cure to a rubber-like consistency and have excellent adhesion to the glass coating, have low shrinkage, and be suitable for interior and exterior application.

3. Sealant curing rate at 73°F and 50% RH.

a. Tack-free time: 6 to 8 hours.

b. Final cure time: 10 to 12 days.

4. EPDM rubber (Ethylene Propylene Diene Monomer) or neoprene gaskets and tape type sealer shall not be used.

A.

2.5 – Glass-Coating Specification

1. Sheets shall be steel grit-blasted on both sides to the equivalent of SSPC SP-10 (Near-White Metal Blast). Sand blasting and chemical pickling of steel sheets is not acceptable.

Surface Preparation

2. The surface anchor pattern shall be not less than 1.0 mil (0.001 inches).

B. Sheet Edges

C.

: Apply edge-coat after initial sheet preparation. Bevel the edges of all sheets. A metal coating of 316 stainless steel shall then be thermally bonded on these edges of thickness of 1.5 mils (0.0015 inches) minimum, and 5 mils (0.005 inches) maximum. The coating shall have a tensile strength of less than 1500 psi.

1. Prior to application of the coating system, all sheets shall be cleaned by a caustic wash and hot rinse process, followed immediately by hot-air drying.

Cleaning

2. Inspection of sheets shall be made for traces of foreign matter, soil particles, grease, or rust.

D.

1. A base coat of glass frit containing nickel oxide shall be applied to both sides of the sheet.

Coating

2. A second coat of milled cobalt blue glass shall be applied to both sides of the sheet.

3. A third coat of glass shall be applied to interior sidewalk and floor sheet surfaces which must be NSF-61 compliant white glass.

4. Exposed sheet edges shall receive the same coating process as exterior sheet surfaces.

5. The coated sheets shall be fired at a minimum temperature of 1500 degrees Fahrenheit in strict accordance with the manufacturer’s ISO 9001 quality control procedures.

6. The coating process desired for interior surfaces is a 3-coat process. Only a 3-coat process will be considered. The interior color shall be WHITE. The exterior color shall be FOREST GREEN. Alternate coating systems other than that detailed above must be approved by the Government prior to bid.

7. Dry film coating thickness for interior surfaces: 12 to 18 mils (0.010 to 0.016 inches) minimum.

8. Dry film coating thickness for exterior surfaces: 7 to 15 mils (0.006 to 0.015 inches) minimum.

E.

1. The tank manufacturer’s quality system shall be ISO 9001 certified and refer to ISO for the following testing and procedures.

Factory Inspection

2. Chemical Resistance of Glass Coating – frits shall be individually tested in accordance with ISO 28706-1:2008.

3. Factory Holiday Test

a. A dry volt test using a minimum of 1100 volts is required.

b. Every sheet shall be tested. Any sheet registering a discontinuity on the interior or floor shall be rejected.

4. Measurement of Glass Thickness

a. Thickness shall be measured using an electronic magnetic induction type of dry film thickness gauge. The thickness gauge shall have a valid calibration record.

b. Every tenth sheet shall be tested. Acceptable glass thickness shall range between 10 and 18 mils (0.010 to 0.018 inches).

5. Measurement of Color

a. The exterior color of sheet shall be measured using a colorimeter, which shall have a valid calibration record.

b. The color must fall within the tolerance specified.

6. Impact Adherence Test: The adherence of the glass coating to the steel shall be tested in accordance with applicable ISO standard. Any sheets not meeting standard shall be rejected.

7. Fishscale Test: The glass coating shall be tested for fishscale by placing the full-size production sheets in an oven at 400 degrees Fahrenheit for one hour. Any sheet exhibiting signs of fishscale shall be rejected. Any lot that contains a rejected sheet shall have all sheets in the lot tested for fishscale.

8. Packaging

a. All sheets that pass the aforementioned quality control checks shall be protected from damage while awaiting packaging for shipment.

b. Heavy paper or plastic foam sheets shall be placed between each panel to eliminate sheet-to-sheet abrasion during shipment.

c. Individual stacks of panels shall be wrapped in heavy mil plastic, placed and steel banded to wood pallets built to maintain the roll-radius of the tank panels. Contact or movement of finished panels should be minimized during shipment.

PART 3 – EXECUTION

A.

3.1 – Erection

1. The tank foundation/pad is a part of this contract and shall be installed by the Contractor.

Foundation

2. Pad preparation includes leveling and expanding the identified tank pad locations to a minimum 30-foot diameter to accommodate tank and access around the tank. Compact pad to 95% per AASHTO T99. Balance cut and fill;

grade out at 1:3 maximum slopes unless otherwise indicated by the Government.

3. The preferred pad consists of an open-graded gravel or sand pad within a steel ring. The ring shall be (minimum) 3/16" steel plate, at least 18" in height.

4. The tank foundation shall be designed by the tank manufacturer to safely sustain the tank and the loads listed herein.

5. Soil bearing strengths less than specified shall be the responsibility of the Government.

6. Slot Mount concrete footings are not acceptable.

B. Tank Floor

1. Bolted steel panels shall be placed over a 3-inch compacted sand base contained by a steel ring wall as detailed above. Should a concrete pad be used, a non-extruding and resilient bituminous type filler meeting the requirements of ASTM D1751 shall be used between the tank floor and the pad.

: Glass-coated bolted steel floor that complies with AWWA D103, latest edition.

2. An ANSI/NSF-Standard-Number-61-compliant plastic-encapsulated nut shall be used to cover the bolt threads exposed on the inside of the floor.

3. Leveling of the starter ring is required. The maximum differential elevation within the ring shall not exceed 1/8-inch, nor exceed 1/16-inch within any 10 feet of length.

C. Sidewall Structure

1. Field erection of tank shall strictly follow tank manufacturer’s manuals, standards, specifications, and details. Work shall be performed by an authorized dealer of the manufacturer.

: Glass-coated bolted steel sides that comply with AWWA D103, latest edition.

2. Particular care shall be taken during tank erection to avoid abrasion of the coating system. Prior to a liquid test, the surfaces shall be visually inspected by the Government.

3. An electrical leak test shall be performed during erection using a wet sponge 9-volt leak detection device. All leak points shall be repaired in accordance to the manufacturer’s recommendations.

4. No backfill shall be placed against the sidewall of the tank at any time.

D. Roof (1:12 slope center)

1. Roof shall be radially sectioned and fabricated from glass-coated, bolted steel panels as supplied from the tank manufacturer. All methods and procedures

: The clear-span, self-supporting roof shall comply with AWWA D103, latest edition.

relating to sidewall construction shall also be followed for the roof construction to assure a weather-tight assembly.

2. Both live and dead loads shall be carried by the tank walls.

3. The roof shall be of a rolled knuckle design, with no rolled angle connection between the sidewall and roof panels.

4. The manufacturer shall furnish a roof opening which shall be placed near the outside tank ladder and which shall be provided with a hinged cover and a hasp for locking. The opening shall have a clearance dimension of at least 24 inches in one direction and 15 inches in the other direction. The opening shall have a curb at least 4 inches in height, and the cover shall have a downward overlap of at least 2 inches. In lieu of the curb and overlay, a gasketed weather-tight cover may be provided.

5. Roof Vent (painted to match tank color)

a. A vent assembly sized to meet AWWA D103 shall be furnished and installed above the maximum water level. Vent shall be of sufficient capacity so that at maximum design rate of water fill or withdrawal, the resulting interior pressure or vacuum will not exceed a 0.5-inch water column.

b. The overflow pipe shall not be considered a tank vent.

c. The vent shall be constructed of aluminum such that the hood can be unbolted and used as a secondary roof access.

d. The design of the vent shall prevent the entrance of birds and/or animals.

This can be accomplished using an expanded aluminum screen with a ½-inch opening. An insect screen of 23 to 25 mesh polyester monofilament shall be provided and designed to open should the screen become plugged by the formation of ice.

E. Appurtenances

1.

: All appurtenances/accessories shall meet AWWA D103, Section 5, and be coated to match tank color.

a. Where pipe connections are shown to pass through tank panels, they shall be field located, sawcut, and utilize an interior and exterior flange assembly. Acetylene torch cutting or welding is not permitted. Tank shell reinforcing shall comply with AWWA D103, latest edition. A single-component urethane sealer shall be applied on any cut panel edges of bolt connections.

Pipe Connections

b. Overflow piping shall be 10 inches in diameter schedule 10 aluminum or stainless steel, and shall contain a flap valve.

c. All site piping is 2 inches in diameter near tanks. Connect to existing site or detailed site piping using 4” mortar-lined ductile iron pipe with poly-wrapped exterior for the first twenty-five (25) feet from the tank. Length of piping should reach ten (10) feet beyond steel ring before connecting into system. Leak test and disinfect such connections as per tank leak and disinfection requirements.

2.

a. An outside tank ladder shall be furnished and installed as per tank manufacturer’s specifications and details.

Outside Tank Ladder

b. Sidewall man-ways shall be a minimum of 30 inches in diameter and shall comply with AWWA D103.

c. Ladders shall be fabricated of aluminum, stainless steel, or galvanized steel, and use grooved, skid-resistant rungs.

d. Safety-cage and step-off platforms shall be made of aluminum, stainless steel, or galvanized steel, and equipped with a hinged lockable entry device to deter unauthorized entry.

3. Inside Tank Ladder

4.

: The inside tank latter shall extend from 12 inches above the tank bottom to the roof access hatch. All ladder rungs shall be skid resistant.

a. One (1) bottom-access door shall be provided in accordance with AWWA D103.

Access Doors

b. The manhole opening shall be a minimum of 30 inches in diameter. The access door (shell manhole) and tank shell reinforcing shall comply with AWWA D103, latest edition.

5. Identification Plate

6.

: A manufacturer’s nameplate shall be affixed to the tank exterior sidewall at a height of approximately 5 feet above grade and shall list:

tank serial number, tank diameter, tank height, and maximum design capacity.

Cathodic Protection: A passive cathodic protection system shall be designed and supplied by the tank manufacturer.

7. Valve and Valve Boxes

8.

: Valves shall brass or steel ball valves. Valve box is to be concrete with lockable (with padlock) steel lid capable of HS20 loading, 2’ x 3’ in size, or approved equal. Valves and valve boxes are to be located at the end of the 25 feet of installed piping (See “Pipe Connections”), and installed in such a manner as to provide easy access to the valves (no lower than 18” deep from the surface of the ground). Spencer Tank valves are to be color-coded or otherwise coordinated with the various outlet pipes installed in that tank. On and off positions for all valves shall be apparent and marked accordingly.

Float

9.

: Shut-off float shall be made of brass or stainless steel and be accessible for repair or replacement without entering the tank.

Liquid Level Indicator

a. Show depth of water in feet with minimum 4-inch numerals. Paint the board white; numerals and level indicator black. See special instructions for Spencer tank as described in Section 01010, Paragraph F, Item 7.

: A liquid level indicator shall be designed and installed such that tank water level can be determined without opening the tank.

b. Indicator Board: Heavy-duty industrial aluminum or approved equal

c. Cable and Connectors: Stainless steel or approved equal.

10. Meter: 2-inch disc-type with bronze body, frost-proof and meeting AWWA C700, ANSI/NSF Standard 61 certified with flanged ends, companion flanges, gaskets, bolts, and nuts. Meters are to be placed where new piping meets site piping, in an approved enclosure/box.

A. Following completion of tank erection and cleaning, the structure shall be tested for liquid tightness by filling the tank to its overflow elevation in accordance with AWWA Section 610-15.

3.2 – Hydrostatic Field Testing

B. Any leaks indentified by this test shall be corrected by the authorized installer in accordance with the manufacturer’s recommendations.

C. Water required for the testing shall be supplied by the Government at no charge to the Contractor. Disposal of the test water shall be the responsibility of the Contractor. The Contractor shall de-chlorinate and dispose of water on site by a method approved by the COR.

D. Labor and equipment necessary for the hydrostatic testing is to be included in the price of the tank.

A. The tank structure shall be disinfected at the time of testing by chlorination in accordance with AWWA Standard C652-02, and as modified by the tank manufacturer.

3.3 – Disinfection

B. Disinfection shall not take place until tank sealant is fully cured. Bac-T samples are to be taken by the Contractor, tested at a ADEQ-approved laboratory, and results provided in writing to the CO.

C. Acceptable forms of chlorine for disinfection shall be as specified in AWWA C652- 02, and:

1. Liquid chlorine, OR

2. Sodium hypochlorite

D. Acceptable methods of chlorination shall be Chlorination Method #3 as specified in AWWA C652-02 Section 4.3.

PART 4 – MEASUREMENT AND PAYMENT

The work described in this section will be measured for and paid for on a per-tank basis as per the Schedule of Items, and will be considered complete when the glass-fused-to-steel potable water storage tanks and all associated appurtenances are properly installed.

4.1 – Method of Measurement & Basis of Payment

***END OF SPECIFICATION 13612***

*** END DIVISION 13 ***

*** END OF SPECIFICATIONS ***