SOW.pdf

STATEMENT OF WORK

Aboveground Steel Tanks

Great Dismal Swamp NWR

Suffolk, Virginia 23434

September 15, 2020

1. Introduction

Great Dismal Swamp National Wildlife Refuge (NWR), located at 3100 Desert Road in Suffolk, Virginia 23434, requires the furnishing and delivery of two horizontal, aboveground double walled steel tanks, each 1000 gallon in size, for use in fuel storage.

2. Scope The vendor shall furnish and deliver two steel tanks as described in the statement of work.

The vendor must provide material submittals for approval by the Government.

The vendor must provide specification sheets and details of the product warranty.

3. Tank Material Specifications:

Furnish (two) 1,000 gallon horizontal aboveground, double-wall type I, steel storage tank 5’4” in diameter by

6’0” long. Tank shall be fabricated from mild carbon steel with flat-flanged heads. Minimum inner tank thickness 7 gauge head and shell. Minimum outer tank thickness 10 gauge head and shell. The tank shall be manufactured in conformance with Underwriters Laboratories' UL-142 specifications and be UL labeled.

Each tank shall have the following accessories:

Manway, with bolted and gasketed lid

Emergency vent

Support Saddles

External Ladder & Platform

Pump Platform

Commercial grit blast (SSPC-6), epoxy primer coat

Exterior polyurethane paint coating

Overfill Containment Chamber

Openings to allow for the installation of a fuel dispensing pump. One tank will be used for storing and dispensing gasoline, and the other tank will be used for storing and dispensing diesel fuel. Required tank openings shall be approved by the Government prior to the manufacturing of the tank.

The tanks shall have labels indicating the capacity, fuel contents and hazard warnings: No Smoking, Gasoline, Flammable; No Smoking, Diesel, Flammable.

The tanks shall have National Fire Protection Association (NFPA) placards for the gasoline storage tank, and the diesel storage tank.

Furnish material submittals for Government approval prior to the manufacture and delivery of the tanks.

Installation Requirements

The Contractor shall furnish and deliver the tanks. Refuge personnel will off load the tanks.

4. Delivery/Work Site

Great Dismal Swamp National Wildlife Refuge, 3216 Desert Road, Suffolk, VA 23434.

5. Period of Performance The tanks shall be delivered within 30 days after material submittals are approved by the

Government.

Scope of Work

Furnish and Deliver two (2) Above Ground Fuel Storage Tank at Maintenance Shop

PART 1 – GENERAL

1.01 Scope of Work: Contractor shall provide all labor, equipment, materials and services to furnish an deliver two (2) 1,000 gallon above-ground, UL 2085 listed, steel vaulted, double-walled tank with accessories to Suffolk , VA.

1.02 SUBMITTALS: The contractor shall submit for approval the manufacturer’s name, tank data, materials of construction, UL listing, installation instructions and warranty.

PART 2 - PRODUCTS

2.01 Fuel Storage Tanks:

A. Two (2) 1,000 gallon UL 2085 listed, steel vaulted, two chamber, double-walled tank manufactured by or equal to Convault Tanks. Tank shall be warranted by the manufacturer for 30 years, and be:

1. Constructed with a rectangular, concrete, reinforced, monolithic shell (encasement) measuring not less than six (6) inches thick on all sides, top, and bottom, and the exterior coated with white two-part epoxy as applied by the manufacturer.

2. All edges of the concrete shell (encasement) shall be chambered not less than four

(4) inches wide.

3. The concrete shell (encasement) will be of one-piece construction, and supported off the slab with concrete runners integral with the shell and running the full width of the shell. The runners shall provide not less than four (4)-inch clearance between the shell and slab. Cold joints are not permitted.

4. The strength of the concrete shall be not less than 4,000 psi, and be reinforced to provide structural, static, and impact integrity.

5. The 1,000 gallon tanks shall be approximately 11’-0” long, 5’-8” wide, 4’-4” high, having a gross weight of approximately 18,000 pounds.

6. The shell (encasement) must contain an interstice (space) for leak monitoring between it and a primary (internal) steel tank which must be constructed of not less than 7-gauge carbon steel with continuous weld along seams, and fitted with a steel bill tube not less than four (4)-inch inside diameter, and terminating not less than six

(6) inches from the bottom of the steel tank to prevent static spray (the primary tank must meet UL Standard 142, and 2085 2-hour fire rating, NFPA Standard 30, and

American Welding Society Standard for continuous welds). In addition, there must be a non-permeable barrier equal to or better than that provided by 30-mil high-density polyethylene between the primary tank and concrete shell. Further, all exterior surfaces of the steel tank must be effectively protected against corrosion and thermal extremes.

7. All exterior steel appurtenances shall be coated to inhibit corrosion (and meet

ASTM B117).

8. The fill tube must be equipped with a lockable cap.

9. Location, size, and number of ports and tank-top openings shall be carefully coordinated with the tank manufacturer prior to ordering tank.

2.02 Tank Accessories

A. Tanks shall be equipped with:

1. A steel UL listed overflow containment basin surrounding the fill inlets manufactured for the primary tank, surrounding fill pipes, and protected by the two-hour fire rating of the enclosure. The overflow basins must have a capacity of not less than seven (7) gallons, and contain a stick port or normally-closed valve to release spilled product into the main tank for overfill protection;

2. Fill limiter, overfill protection (shutoff) valve, rated to close and limit fill automatically at 95 percent level;

3. Audible overfill alarm or combination vent/overfill alarm to alert user when tank is near full;

4. Clock-type visual level gauges for determining the level of liquid in each tank that is accessible to the delivery operator;

5. Neoprene bearing pad kit for tank;

6. Vent package, with vent pipes, emergency vents, vent and fill caps, adaptors, gauge sticks. Terminate top of vent not less than 12 feet from grade

7. Double-wall fuel hoses and/or piping suitable for the stored product;

8. Where product piping extends below the top of the tank, the piping shall include a shut-off valve and normally-closed safety valve. The safety valve shall be an approved anti-siphon valve or electric solenoid to prevent siphoning or flow should fuel line break;

9. Placards and labels are to be placed on all tanks, all sides, and be impervious to tank contents, UV, and extreme weather exposure. Furnish NFPA placards

(gasoline=:1,3,0 or diesel=: 0,2,0). Additionally, label each tank with its capacity, contents and hazard warnings (“No Smoking, Gasoline, Flammable”; “No Smoking, Diesel, Flammable”).

2.03 DISPENSING UNIT:

1. The system shall be equipped with a UL-listed, electrically-operated 15 gpm dispensing pump in an enclosed steel cabinet mounted on top of 1,000-gallon capacity tanks or less, and on the side of tanks greater than 1,000-gallon capacity, and using steel side mounting brackets provided and installed by the manufacturer.

2. Nozzles from which gasoline or methanol is introduced into motor vehicles shall have a maximum flow rate not to exceed 10 gallons per minute as may be controlled through any means in the pump/dispenser system. Any dispensing pump that is dedicated exclusively to heavy-duty vehicles, boats, or airplanes is exempt from this requirement.

3. Anti-spill valves - where product piping extends below the top of the tank, the piping shall include a shut-off valve and normally-closed safety valve. The safety valve shall be an approved anti-siphon valve or electric solenoid valve.

4. Either pump/dispenser must be installed on the side nearest the vehicles to be serviced. The pumping system shall include:

A. Filter

B. Hose (must also be listed for the product dispensed)

C. Auto-shutoff nozzle

D. Safety sever/shear valve

E. Anti-siphon (back-flow) valve, or electric solenoid valve

F. Grounding feature

2.04 Miscellaneous Tank Accessories

A. Filters, fittings, fittings, strainers, valves, priming tees;

B. Double-walled piping and hoses listed for the product used;

C. Grounding system;

D. Other materials equipment, and appurtenances required for the proper installation of the fuel system for the above ground tank pump;

E. Electrical supply conforming to NFPA 70

PART 3 - EXECUTION

3.01 Contractor shall furnish and deliver tanks, accessories, connections, start-up, manuals and instruction for a complete and operating installation. Coordinate work and as required with

Station Manager.

3.02 Work shall be in accordance with latest edition of federal, state and local environmental, safety, and fire regulations; National Fire Protection Association Code and/or standards;

federal, state and local codes.

3.03 Ground the fuel tank in accordance with the general requirements of NFPA 780, Lighting

Protection Code. Grounding rod shall be ¾” diameter, 10’-0” copper-clad steel, solid copper or stainless steel. Position rod in close proximity to the tank vent pipe to accommodate a #4 single strand copper wire clamped from vent pipe to ground rod. The wire and rod must be installed in a manner as to prevent tripping hazards.

3.05 The tank must be suitably anchored to withstand uplifting by hurricanes, tornadoes, floods, or high-water surges. The tank system shall be anchored to the slab/ground with 3/8” 18-8 galvanized or stainless steel cable secured to embedded eyebolts, and maintained tightly with turnbuckles.

3.06 Calibrate clock fuel gauges, provide water-resistant chart to station indicating gauge reading with calculated product level (e.g., 3’ = 700 gallons full).

3.07 Test the fuel storage and delivery systems to ensure the fuel is properly fed, leak free, and operates in a satisfactory manner. Repair and retest if necessary.

3.08 Clean site of all materials and debris.

3.09 Provide the Station Manager instruction on the system, accessories, tank gauge reading chart, operation procedures, manufacturer warranties, and tank manufacturer inspection, repair, and operation literature. Provide 2 sets in binder to the Station Manager prior to final acceptance.