33 01 16 Am1.pdf

Berlin Lake, Paint Water Tank, Mill Creek Recreation Area

SECTION TABLE OF CONTENTS

DIVISION 33 - UTILITIES

SECTION 33 01 16

REHABILITATION OF ELEVATED STEEL WATER STORAGE TANK

PART 1 GENERAL

1.1 SUMMARY OF WORK

1.1.1 Site Preparation

1.2 REFERENCES

1.3 SYSTEM DESCRIPTION

1.4 SUBMITTALS

1.5 QUALITY ASSURANCE

1.5.1 Qualifications

1.5.2 Regulatory Requirements

1.6 WORK PLAN

1.7 DELIVERY, STORAGE, AND HANDLING

PART 2 PRODUCTS

2.1 MATERIALS

2.1.1 Steel

2.1.2 Steel Pipe

2.1.3 Pipe Flanges

2.1.4 Pipe Insulation

2.2 ASSEMBLIES

2.2.1 Tank Accessories

2.2.1.1 Pipe Connections

2.2.1.2 Overflow

2.2.1.3 Vent

2.2.1.4 Ladders and Safety Devices

2.3 TANK WATER CIRCULATION SYSTEM

PART 3 EXECUTION

3.1 DEMOLITION

3.2 CATHODIC PROTECTION

3.3 PIPING INSTALLATION (EXCEPT FOR OVERFLOW PIPING)

3.3.1 General Guidelines

1.5.1 Welding

3.3.2 Testing of Piping

3.4 OVERFLOW PIPING

3.5 CONDENSATE DRAIN

3.6 REPAIR OF ANODE ACCESS HOLES

3.7 INSTALLATION OF ACCESSORIES

3.7.1 Ladders

3.7.2 Tank Water Circulation System

3.7.3 Vent

3.8 MISCELLANEOUS REPAIRS

3.9 DISINFECTION

SECTION 33 01 16 Page 1 W911WN-10-B-0002 Revised by Amendment 0001

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SECTION 33 01 16 Page 2

SECTION 33 01 16

REHABILITATION OF ELEVATED STEEL WATER STORAGE TANK

PART 1 GENERAL

1.1 SUMMARY OF WORK

The work under this section includes rehabilitation of the existing elevated water storage tank at the Mill Creek Recreation Area. The work includes the following features:

1. Remove existing fill and discharge pipe at the flexible coupling and replace with new pipe.

2. Furnish and install new tank water circulation system in the tank.

3. Replace seal on manhole in tank.

4. Remove existing access ladders and replace with OSHA approved ladders and furnish and install safety climbing devices.

5. Cover existing anode access holes in top of tank.

6. Remove existing overflow line and condensate drain line and install new overflow and drain lines, reroute overflow line through the shell of the pedestal and modify the existing drain line to provide an airgap. Route condensate drain line to existing drain line. See attached Photo 33 01 16 - 1.

7. Modify landings so that condensate drains properly.

8. Remove existing vent and install new vent.

9. Reinstall access hatch from access hatch to roof and install new securing hasps.

10. Install new gasket on oval access hatch.

11. Replace electrical system and lighting fixtures in the elevated tank and valve pit. New panelboard and lighting fixtures shall of the same type as the existing or similar type suitable for the intended service. See attached Photos 33 01 16 - 2 and 33 01 16 - 3.

12. Replace electric heaters in the valve pit.

Cleaning and painting of the elevated water storage tank is specified in Section 09 97 13.23 PAINTING ELEVATED WATER TANK. Replacement of the cathodic protection system is specified in Section 26 42 22.00 20 CATHODIC PROTECTION SYSTEM FOR STEEL WATER TANKS. Heat tracing cable and valve pit heaters are specified in Section 26 20 00 ELECTRICAL WORK.

1.1.1 Site Preparation

Trees adjacent to the elevated water storage tank may interfere with erection of containment for the blast cleaning and painting. Limbs and branches extending over the fence surrounding the tank shall be neatly cut close to the bole of the tree or main branches. Cuts more than 1-1/2 inches in diameter shall be painted with an approved tree-wound paint.

1.2 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

SECTION 33 01 16 Page 3

AMERICAN WATER WORKS ASSOCIATION (AWWA)

AWWA C600 (2005) Installation of Ductile-Iron Water Mains and Their Appurtenances

AWWA C652 (2002) Disinfection of Water-Storage Facilities

AWWA D100 (2007) Welded Steel Tanks for Water Storage

AWWA D103 (1997) Factory-Coated Bolted Steel Tanks for Water Storage

ASME INTERNATIONAL (ASME)

ASME B16.5 (2009) Standard for Pipe Flanges and Flanged Fittings: NPS 1/2 Through NPS 24

ASTM INTERNATIONAL (ASTM)

ASTM A 105/A 105M (2005) Standard Specification for Carbon Steel Forgings for Piping Applications

ASTM A 193/A 193M (2008b) Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service

ASTM A 53/A 53M (2007) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM C 1126 (2004) Standard Specification for Faced or Unfaced Rigid Cellular Phenolic Thermal Insulation

ASTM C 534/C 534M (2008) Standard Specification for Preformed Flexible Elastomeric Cellular Thermal Insulation in Sheet and Tubular Form

ASTM C 552 (2007) Standard Specification for Cellular Glass Thermal Insulation

ASTM C 591 (2008a) Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal Insulation

AMERICAN SOCIETY OF SAFETY ENGINEERS (ASSE/SAFE)

ASSE/SAFE Z359.1 (2007) Safety Requirements for Personal Fall Arrest Systems, Subsystems and Components

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-25 (2008) Standard Marking System for Valves, Fittings, Flanges and Unions

SECTION 33 01 16 Page 4

NSF INTERNATIONAL (NSF)

NSF 61 (2008) Drinking Water System Components - Health Effects

U.S. NATIONAL ARCHIVES AND RECORDS ADMINISTRATION (NARA)

29 CFR 1910 Occupational Safety and Health Standards

1.3 SYSTEM DESCRIPTION

The water tank was erected in 1972. An inspection of the tank was performed in July 2009. The purpose of this rehabilitation is to upgrade the tank and mitigate deficiencies revealed by the inspection. All work shall be performed in accordance with applicable NSF, ANSI, and OSHA requirements as specified. The design of modifications to the tank structure, including holes through the shell, shall be accomplished or reviewed and approved by architects or engineers registered to practice in the particular professional field involved in a State or possession of the United States, in Puerto Rico, or the District of Columbia.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

Work Plan; G, ED

Work plan, before proceeding with any work on the water tank.

SD-02 Shop Drawings

Tank Modifications; G, ED

Detail drawings, before proceeding with any fabrication or modification of the tank and accessories. Complete drawings with details of steel and pipe work, and of the assembling of items required for the total installation. Use standard welding symbols as recommended by the American Welding Society.

SD-03 Product Data

Tank Water Circulation System; G, ED Valves; G, ED Ladders and Safety Devices; G, ED Vent; G, ED Steel Pipe; G, ED Heat Tracing System; G, ED Pipe Insulation; G, ED

SD-06 Test Reports

Testing of Valves and Piping

SECTION 33 01 16 Page 5

At the conclusion of the work, a written report prepared by the Contractor covering the hydrostatic test and certifying that the work was inspected in accordance with Section 11.2.1 of AWWA D100.

1.5 QUALITY ASSURANCE

1.5.1 Qualifications

All work on the tank rehabilitation shall be performed under the supervision on a person with a minimum of five years of experience in the construction and/or rehabilitation of elevated water tanks.

1.5.2 Regulatory Requirements

All work shall be performed in accordance with AWWA D100 and NSF 61.

1.6 WORK PLAN

Prepare a work plan for the rehabilitation work. The plan shall include coordination of all work, including cleaning and painting. The plan shall be approved prior to removal of any existing equipment. Drawings shall be submitted for any modifications to the existing structure or components required for new equipment or accessories.

1.7 DELIVERY, STORAGE, AND HANDLING

Handle and store water storage tank systems, components, and parts to prevent distortions and other damage that could affect their structural, mechanical, or electrical integrity. Replace damaged items that cannot be restored to original condition. Store items subject to deterioration by exposure to elements, in a well-drained location, protected from weather, and accessible for inspection and handling.

PART 2 PRODUCTS

2.1 MATERIALS

Provide materials conforming to the following requirements:

2.1.1 Steel

Section 2 of AWWA D100 or Section 2 of AWWA D103.

2.1.2 Steel Pipe

ASTM A 53/A 53M, type E or S, with welded joints.

2.1.3 Pipe Flanges

Flanged fittings including flanges, bolts, nuts, bolt patterns, etc., shall be in accordance with ASME B16.5 class 150 and shall have the manufacturer's trademark affixed in accordance with MSS SP-25. Flange material shall conform to ASTM A 105/A 105M. Bolts shall be high strength or intermediate strength with material conforming to ASTM A 193/A 193M.

Nonmetallic gaskets shall conform to ASME B16.21 and be a maximum 1/8 inch thick chloroprene rubber, durometer hardness No.80, 1,500 psi minimum tensile strength, 125 percent minimum elongation, flat ring type for use with raised face flanges and full face type for use with flat face flanges.

SECTION 33 01 16 Page 6

2.1.4 Pipe Insulation

Insulation for the fill and discharge pipe shall be 2" minimum thickness and shall comply with one of the following:

Cellular Glass: ASTM C 552, Type II, Class 2 Flexible Elastomeric Cellular: ASTM C 534/C 534M, Type I Faced Phenolic Foam: ASTM C 1126, Type III Polyisocyanurate: ASTM C 591, Type I

Vapor barrier will be required with faced phenolic foam and polyisocyanurate insulation. The insulation shall be capable of withstanding the temperatures generated by the heating cables.

2.2 ASSEMBLIES

2.2.1 Tank Accessories

Section 7 of AWWA D100 or Section 5 of AWWA D103 and as specified.

Additional requirements for accessories are as follows:

2.2.1.1 Pipe Connections

Section 7 of AWWA D100 and Section 5 of AWWA D103 represent the minimum requirements. Number, type, location, and size of pipe connections shall be the same as the existing. Inlet and outlet pipe connections shall be at approximately the same locations as the existing connections.

2.2.1.2 Overflow

The overflow for the tank shall consist of an overflow weir and drop pipe.

The overflow pipe shall be steel, ASTM A 53/A 53M or equal, and shall terminate 1 to 2 feet above grade and shall be fitted with a flapper valve and screen to prevent ingress of animals and insects.

2.2.1.3 Vent

Vent shall be welded to the cover plate of the center manhole on the roof.

Vent shall be standard type vent. The vent shall have bird and insect screens and shall be frost proof. Screening for vent shall conform to Section 5.7.2 of AWWA D100 or Section 5.7.2 of AWWA D103which ensures fail-safe operation in the event that screen frosts over and the bottom of the screen shall be sufficiently elevated for snow consideration in the area.

2.2.1.4 Ladders and Safety Devices

Ladders and safety devices shall be provided in accordance with Sections

7.4 and 7.5 of AWWA D100 or Sections 5.4 and 5.5 of AWWA D103. Location of ladders shall be compatible with the existing locations. Sections 7.4 and

7.5 of AWWA D100 and Sections 5.4 and 5.5 of AWWA D103 represent the minimum requirement. In addition, safety cage, rest platforms, roof ladder handrails, and other safety devices shall be provided as required by Federal or local laws or regulations. Safety climbing devices, consisting of flexible cable type system with full body harness, and complying with ASSE/SAFE Z359.1 shall be provided for all ladders. Ladders in pedestal shall be galvanized steel. Ladders in wet area of the tank shall be stainless steel. Any structural modifications required for installation of the ladders shall be designed by the Contractor and shown on drawings

SECTION 33 01 16 Page 7 submitted with the work plan. The stainless steel shall be electrically isolated from the tank to prevent galvanic corrosion.

2.3 TANK WATER CIRCULATION SYSTEM

A tank water circulation system shall be installed in the tank to provide positive movement of water throughout the tank to prevent thermal stratification of water in the tank. The system shall be commercially available and shall have been in satisfactory operation for at least five years. The system may permit entrance of water from the fill pipe into the tank and various levels throughout the tank similar to Triple Check Positive Retention System as manufactured by T.A.P. Company, Rosebud, MO.

Other systems which have demonstrated ability to provide positive circulation of the water may be furnished subject to the approval of the Contracting Officer.

PART 3 EXECUTION

3.1 DEMOLITION

Removal of existing piping, equipment and accessories shall be performed by methods that do not damage items and structures to remain. Any damage to items or structures not specified to be removed shall be repaired to the satisfaction of the Contracting Officer at no additional cost to the Government. The Contractor is alerted to the fact that painted items on the interior of the pedestal and exterior of the tank may have lead-containing primer.

3.2 CATHODIC PROTECTION

Cathodic protection shall be provided, conforming to Section 26 42 22.00 20

CATHODIC PROTECTION SYSTEM FOR STEEL WATER TANKS.

3.3 PIPING INSTALLATION (EXCEPT FOR OVERFLOW PIPING)

3.3.1 General Guidelines

The existing piping and mounting bracket shall be removed. New mounting brackets shall be furnished and installed for the piping.

1.5.1 Welding

Procedures and welders shall be qualified in accordance with ASME BPVC SEC IX. Welding procedures qualified by others, and welders and welding operators qualified by another employer, may be accepted as permitted by ASME B31.1. The Contracting Officer shall be notified 24 hours in advance of tests, and the tests shall be performed at the work site if practicable. Welders or welding operators shall apply their assigned symbols near each weld they make as a permanent record.

3.3.2 Testing of Piping

After the piping is installed, and before field painting is begun, the piping shall be hydrostatically tested in accordance with Section 4 of AWWA C600. Replace with sound material any defective material disclosed by the pressure test; the test shall be repeated until the test results are satisfactory.

SECTION 33 01 16 Page 8

3.4 OVERFLOW PIPING

The existing overflow pipe shall be removed above the flexible coupling.

The drain line through the floor shall be capped. The new 4-inch diameter overflow pipe shall be installed with a new 4-inch tee to the gate valve at the fill and discharge pipe and 90-degree elbow. The overflow line shall be extended from the 90-degree elbow through the shell of the pedestal and shall extend approximately 18 inches beyond the exterior. The pedestal shell shall be analyzed by a Registered Professional Engineer in accordance with paragraph System Description, and the shell shall be reinforced at the location of the hole as required. A 24-mesh stainless insect steel screen shall be installed between 2 bolted flanges at the discharge end of the pipe. A 2' x 3' precast concrete catch basin with steel highway grating shall be installed outside the tank foundation and below the overflow/drain pipe discharge to receive flow from the pipe and shall be connected to the existing underground drain line. The screened end of the oveflow/drain pipe shall be not less than 18 inches the above the top surface of the inlet. Note that the catch basin may have to be installed at an offset from the drain line in order for the overflow pipe to be routed to avoid the existing conduits and lighting panel in the tank pedestal.

3.5 CONDENSATE DRAIN

The existing condensate drain line shall be removed. The new condensate drain line shall be the same size as the existing drain line. The new condensate drain line shall be installed at the lowest point of each landing and shall extend down the shell wall to approximately 16 inches above the floor. The drain line shall be extended to the existing 4" cast iron overflow drain line and provided with a suitable connection.

3.6 REPAIR OF ANODE ACCESS HOLES

Holes for access to the existing suspended anode system shall be sealed by welding 1/4" minimum thickness steel plate over the holes. The holes shall be completely sealed. The interior of the holes shall be sealed with polyurethane sealant after completion of painting.

3.7 INSTALLATION OF ACCESSORIES

3.7.1 Ladders

Ladders shall be installed in accordance with AWWA D100 and 29 CFR 1910.

3.7.2 Tank Water Circulation System

The circulation system shall be installed in accordance with the manufacturer's instructions.

3.7.3 Vent

The existing vent shall be completely removed, and the new vent shall be installed in accordance with the manufacturer's instructions.

3.8 MISCELLANEOUS REPAIRS

New securing hasps shall be installed on the roof access hatch. A new lock, suitable for the purpose, shall be installed on the roof to bowl access hatch. New neoprene gaskets, similar to the existing, shall be installed on the roof access hatch, the oval access hatch, and the manhole

SECTION 33 01 16 Page 9 at the bottom of the tank.

3.9 DISINFECTION

The elevated tank and connecting lines thereto shall be disinfected with chlorine before being placed in operation.

The elevated tank shall be disinfected in accordance with AWWA C652. Water from the existing water system may be used for filling the tank for disinfection. After the chlorination procedure is completed and before the storage facility is placed in service, the Contracting Officer will collect samples of water in properly sterilized containers for bacteriological testing from the full facility in accordance with Section 7 of AWWA C652.

The tank will not be accepted until satisfactory bacteriological results have been obtained. After coating system has been inspected, approved, and cured, rinse tank with potable water. Disinfect tank and connecting lines in accordance with AWWA C652, Method 1, Method 2, or Method 3. Dispose of heavily chlorinated water in accordance with AWWA C652, Appendix C. The Contractor shall be responsible for proper collection and disposal of chlorinated water and rinse water from the disinfection and rinsing operations. The Contractor shall be responsible for providing and removing all temporary connections required for this work, for restoring the water system to its original operating condition, and returning the elevated water storage tank to operation upon completion of all work.

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SECTION 33 01 16 Page 10

PHOTO 33 01 16 - 1

WATER TOWER

1. REPLACE FILL LINE, HEAT TRACE CABLE AND INSULATION ABOVE FLOOR.

2. REPLACE OVERFLOW LINE AND REROUTE BELOW TEE THROUGH WALL OF

PEDESTAL TO DISCHARGE INTO NEW CATCH BASIN

PHOTO 33 01 16 - 2

1. REPLACE LIGHTING PANEL

2. REPLACE CATHODIC PROTECTION AND CONTROL PANEL

PHOTO 33 01 16 - 3

1. REPLACE LIGHTING PANEL

2.3 TANK WATER CIRCULATION SYSTEM

Water Tank Rehabilitation Photographs