1__Specifications_-_Milton_Storage_Tanks.pdf

2024 Milton Storage Tanks

DOI-BLM-MT-C010

December 2024

Billings Field Office 5001 Southgate Drive Billings, MT 59101

Statement of Work

Table of Contents 1 Background

2 Scope

3 General

4 Products

5 Delivery Location

6 Warranty

1 Background The Bureau of Land Management (BLM) Billings Field Office (BiFO) is partnering with Milton Ranch, LLC on upgrading the water storage system servicing the BLM grazing allotment. The project will involve purchasing two 20,000-gallon storage tanks to replace the open pit system currently in place to be used for non-potable water to service livestock.

2 Scope Procure two 20,000-gallon ribbed, horizontal fiberglass storage tanks. Labor associated with plumbing and setting the tanks is not part of the scope.

It is the contractors’ responsibility to provide, and transport the tanks approximately 12 miles northeast of Roundup, MT to 46.5391807 N, -108.4070733 W . The BLM will require a 10-day notice before delivery to ensure unloading operations by others are scheduled, and the Contracting Officer Representative is available to accept delivery.

3 General

Quality Assurance A. Governing Standards, as applicable:

1. Tank manufacturer shall be in the business of manufacturing tanks to applicable standards.

2. Tank shall be manufactured to meet or exceed ASTM D3299, ASTM D4097, and AWWA D120.

Submittals A. Product Data: Include rated capacities, accessories, appurtenances, and furnished specialties for each surface water-storage tank indicated.

1. Shop Drawings: Show fabrication and installation details for each water-storage tank, including the following:

a. Tank and shell openings.

b. Man-way extensions and hatches.

c. Plans, elevations, sections, details, and attachments to other work.

d. Certification of Occupation Safety and Health Administration conformance. (Manways, etc.)

e. Anchor details and material list for temporary ware yard storage.

4 Products

Two Single-Wall Fiberglass Reinforced Plastic (FRP) Storage Tanks A. Loading Conditions – Tanks shall meet the following design criteria:

1. Internal Load – Tanks shall withstand a 5-psig air-pressure test with 5:1 safety factor.

2. Tanks shall support accessory equipment – such as internal pump platforms, drop/fill tubes, submersible pumps and ladders – when installed according to tank manufacturers current Installation Manual and Operating Guidelines.

3. Tanks shall have a structural wall thickness of a minimum 0.375” or thicker if load calculations require.

B. Product Storage

1. Both Tanks shall be capable of storing approximately 20,000 gallons of water products with specific gravity up to 1.1.

2. Tanks shall be vented to atmospheric pressure.

3. Tanks shall be capable of storing products identified in the manufacturer’s current standard limited warranty.

C. Materials

1. Tanks shall be manufactured with 100% resin and glass-fiber reinforcement with no sand fillers.

D. Tank Dimensions

1. Tanks shall have a capacity of 20,000 gallons, or Government Contracting Officer (CO) approved.

2. Tanks shall have nominal outside diameter of approximately 12 feet.

3. Tank shall have approximate overall length of 26 feet.

Accessories A. Manways

1. Each tank shall have a manway, it shall be flanged and 30"-nominal diameter, complete with gasket, bolting hardware and FRP cover, and approximately 3 feet from the inside flange, see internal ladder description below.

2. Actual location shall be shown on tank shop drawings, and approved by CO.

3. Each manway shall have an extension constructed of FRP. Length will be approved on shop drawing. The extension shall be designed to withstand all expected loads.

4. All tanks for stock water use require at least one manway, and extension.

5. Approved shop drawings provided by the contractor shall show exact location of the manway.

B. Fittings

1. Each tank shall have one air vent fitting at the top of the radius of the tanks. These fittings shall be 2 inches, flat faced, and flanged, and shall conform to ANSI B16.5 150 # bolting pattern.

2. Each tank shall have (2) FRP bottom dome nozzles they shall be 3 inches, flat-faced and flanged, and shall conform to ANSI B16.5 150 # bolting pattern.

3. One tank shall have a FRP top dome nozzle that shall be 4 inches, flat-faced and flanged, and shall conform to ANSI B16.5 150 # bolting pattern. This will be used for an overflow and will be required on only one of the tanks.

C. Access Openings

1. FRP access openings shall be 30” in diameter

2. PVC Risers and FRP lids shall be provided by the tank manufacture for field installation on access openings.

3. Lockable manway.

D. Storage saddles

1. Saddles will be provided to the BLM for short term storage of the tanks in the BLM ware yard.

E. External Ladder

1. No external ladder shall be required.

F. Internal Ladder

1. Each tank will have an internal ladder about 3 feet from the inside flange, and the float bracket on the first tank will be incorporated into the ladder.

5 Delivery Location A. It is the contractors’ responsibility to provide, and transport the tanks approximately 12 miles northeast of Roundup, MT to 46.5391807 N, -108.4070733 W. The BLM will require a 10-day notice before delivery to ensure unloading operations by others are scheduled, and the Contracting Officer Representative is available to accept delivery.

6 Warranty

Warranty A. Warranty shall be manufacturer’s warranty for underground water and potable water tanks in effect at time of delivery and extend 1 year.