36C24220B0036-0001003.pdf

Montrose VAMC

Montrose, NY

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SSECTION 23 10 00

FACILITY FUEL OIL SYSTEMS

PART 1 - GENERAL

1.1 DESCRIPTION

A. Diesel fuel oil tank shall be located outside and above ground. The tank shall be unheated, piping, and accessories shall be located outside. Refer to Drawing ES101 for exact location of diesel fuel tank.

B. Fuel oil tank shall be round cylindrical type (Rectangle shape not permitted) 5,000-gallons in size and approximately 8’-0” in diameter

(Exact size may vary depending on manufacturer).

C. The fuel tank shall be double walled and must meet UL 142.

D. The fuel tank shall be mounted above ground and constructed out of carbon steel.

E. The fuel storage tank shall be double wall thickness.

F. Fuel oil tank fluid level monitoring and alarm systems.

G. Leak detection system for tanks and underground piping.

H. Fuel oil quality maintenance system (water and particulate removal).

I. The fuel oil tank shall be factory painted white in color.

J. The contractor shall route rigid conduit with Glass Fiber Reinforced

Plastic (FRP) within concrete cell-duct system underground from fuel oil tank to Boiler Plant (Approximately 450 yards). The contractor shall include ground penetrating radar in bid. See specification

231000/2.4/C/1-3 for additional information. The conduit shall be designated for monitoring and no other disciplines shall be permitted within conduit system.

K. The contractor shall route rigid conduit with Glass Fiber Reinforced

Plastic (FRP) within concrete cell-duct system underground from fuel oil tank to Building No. 3 (Approximately 250 yards). The contractor shall include ground penetrating radar in bid. See specification

231000/2.4/C/1-3 for additional information. The conduit shall be designated for monitoring and no other disciplines shall be permitted within conduit system.

1.2 RELATED WORK

A. Section 01 00 00, GENERAL REQUIREMENTS.

B. Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

C. Section 03 30 00, CAST-IN-PLACE CONCRETE.

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D. Section 09 91 00, PAINTING.

E. Section 26 05 41, UNDERGROUND ELECTRICAL CONSTRUCTION.

F. Section 31 20 00, EARTHWORK.

1.3 SUBMITTALS

A. Submittals, including number of required copies, shall be submitted in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND

SAMPLES.

B. Information and material submitted under this section shall be marked

“SUBMITTED UNDER SECTION 23 10 00, FACILITY FUEL OIL SYSTEMS”, with applicable paragraph identification.

C. Manufacturer's Literature and Data including: Full item description and optional features and accessories. Include dimensions, weights, materials, applications, standard compliance, model numbers, size, and capacity.

D. Aboveground Carbon Steel Tanks, Including Vault-type Tanks:

1. Drawings of tanks, supports, ladders, platforms, heating coils, tank manholes, emergency relief vents and all accessories. Include overall dimensions and dimensional locations and sizes of pipe connections, and access openings.

2. Recommended tank support locations.

3. Weight of entire tank assembly, empty and flooded.

4. Design and construction of primary tanks, insulation, secondary containment, supports, pipe connections, platforms.

5. Application and performance data on coatings from manufacturer of coatings.

6. Data certifying tanks are designed for surcharge loads of platforms shown.

7. Certification of compliance with specified standards.

8. Certification that steel tank manufacturer participates in Steel

Tank Institute (STI) Quality Assurance Program.

9. Design, construction, performance, dimensions of emergency relief vents.

E. Fuel Piping:

1. ASTM and UL compliance.

2. Grade, class or type, schedule number.

3. Manufacturer.

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F. Pipe Fittings, Unions, Flanges:

1. ASTM and UL compliance.

2. ASTM standards number.

3. Catalog cuts.

4. Pressure and temperature rating.

G. Foot Valves, Check Valves, Overfill Prevention Valves:

1. Catalog cuts showing design and construction.

2. Pressure and temperature ratings.

3. Pressure loss and flow rate data.

4. Materials of construction.

5. Accessories.

H. Secondary Containment System for Fuel Piping:

1. Sizes, materials, construction of containment system including end seals, sumps, coatings and pipe supports.

2. Layout of system.

3. Installation instructions.

4. Design of cathodic protection system (steel casing).

I. Leak Detection System:

1. Drawings, description and performance data on sensors, control units.

2. Description of operation.

3. Layout of system.

4. Installation and operating instructions.

5. Data on interconnecting wiring systems to be furnished.

J. Tank Fluid Level Monitoring Instrumentation System:

1. Drawings showing instruments and in-tank sensing units, with dimensions.

2. Design and construction of all elements of system.

3. Installation instructions.

K. Tank and Piping Accessories: Design, construction, and dimensions of vent caps, fill boxes, fill caps, spill containers and other accessories.

L. Fuel Quality Maintenance System:

1. Drawings and description of all components and arrangement of system.

2. Design and performance of pumps, filters.

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3. Catalog data and operation of control system.

4. Installation instructions.

M. Complete operating and maintenance manuals including wiring diagrams, technical data sheets, information for ordering replacement parts, and troubleshooting guide:

1. Include complete list indicating all components of the systems.

2. Include complete diagrams of the internal wiring for each item of equipment.

3. Diagrams shall have their terminals identified to facilitate installation, operation and maintenance.

1.4 QUALITY ASSURANCE

A. Approval by Contracting Officer is required of products or services of proposed manufacturers, suppliers and installers, and will be based on

Contractor’s certification that:

1. Manufacturers regularly and currently manufacture tanks, tank and piping accessories, tank fluid level monitoring and leak detection systems, and fuel quality management systems.

2. Manufacturers of steel tanks participate in the Quality Assurance

Program of the Steel Tank Institute (STI).

3. The design and size of each item of equipment provided for this project is of current production and has been in satisfactory operation on at least three installations for approximately three years. Current models of fluid level and leak detection systems with less than three years’ service experience are acceptable if similar previous models from the same manufacturer have at least three years’ service experience.

B. Apply and install materials, equipment and specialties in accordance with manufacturer’s written instructions. Conflicts between the manufacturer’s instructions and the contract drawings and specifications shall be referred to the COR (Contracting Officer

Representative) for resolution. Provide copies of installation instructions to the COR (Contracting Officer Representative) two weeks prior to commencing installation of any item.

C. All equipment shall be free from defects that would adversely affect the performance, maintainability and appearance of individual components or overall assembly.

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D. Tanks, Secondary Containment Systems for Piping, Plastic Piping and

Containment Systems, Tank Level Monitoring Systems, Leak Detection

Systems, Fuel Quality Management Systems, Cathodic Protection Systems:

Authorized manufacturer’s representatives shall provide onsite training of installers and supervision of the installation and testing of the equipment and systems to assure conformance to written instructions of manufacturers.

E. Tank and piping installation contractor shall be certified as acceptable by local and state pollution control authorities.

F. Entire installation shall conform to requirements of local and state pollution control authorities.

G. Pipe Welding: Conform to requirements of ASME B31.1. Welders shall show evidence of qualification. Welders shall utilize a stamp to identify their work. Unqualified personnel will be rejected.

H. Assembly of Glass Fiber Reinforced Plastic Piping: Installation personnel shall have been trained, tested and certified under a procedure approved by the manufacturer of the piping. Proof of certification, in writing, shall be provided to the COR (Contracting

Officer representative).

I. Where specified codes or standards conflict, consult the COR

(Contracting Officer Representative).

J. Label of Conformance (definition): Labels of accredited testing laboratories showing conformance to the standards specified.

K. Equipment and materials installed shall be compatible in all respects with other items being furnished and with existing items so that the result will be a safe, complete and fully operational system which conforms to contract requirements and in which no item is subject to conditions beyond its design capabilities.

1.5 AS-BUILT DOCUMENTATION

A. Submit manufacturer’s literature and data updated to include submittal review comments and any equipment substitutions.

B. Submit operation and maintenance data updated to include submittal review comments, VA approved substitutions and construction revisions shall be in electronic version on CD. All aspects of system operation and maintenance procedures, including applicable piping isometrics, wiring diagrams of all circuits, a written description of system

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23 10 00 - 6 design, control logic, and sequence of operation shall be included in the operation and maintenance manual. The operations and maintenance manual shall include troubleshooting techniques and procedures for emergency situations. Notes on all special systems or devices shall be included. A List of recommended spare parts (manufacturer, model number, and quantity) shall be furnished. Information explaining any special knowledge or tools the owner will be required to employ shall be inserted into the As-Built documentation.

C. The installing contractor shall maintain as-built drawings of each completed phase for verification; and, shall provide the complete set at the time of final systems certification testing. Should the installing contractor engage the testing company to provide as-built or any portion thereof, it shall not be deemed a conflict of interest or breach of the ‘third party testing company’ requirement. Provide record drawings as follows:

1. Red-lined, hand-marked drawings are to be provided, with one paper copy and a scanned PDF version of the hand-marked drawings provided on CD.

D. The as-built drawings shall indicate the location and type of all lockout/tagout points for all energy sources for all equipment and pumps to include breaker location and numbers, valve tag numbers, etc.

Coordinate lockout/tagout procedures and practices with local VA requirements.

E. Certification documentation shall be provided to COR (Contracting

Officer Representative) 21 working days prior to submitting the request for final inspection. The documentation shall include all test results, the names of individuals performing work for the testing agency on this project, detailed procedures followed for all tests, and provide documentation/certification that all results of tests were within limits specified. Test results shall contain written sequence of test procedure with written test results annotated at each step along with the expected outcome or setpoint. The results shall include all readings, including but not limited to data on device (make, model and performance characteristics), normal pressures, switch ranges, trip points, amp readings, and calibration data to include equipment serial numbers or individual identifications, etc.

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1.6 PERMITS

A. Contractor shall obtain and complete all tank permit and registration forms required by governmental authorities.

PART 2 - PRODUCTS

2.1 ABOVEGROUND STEEL TANKS

A. Type: Factory-fabricated all welded carbon steel tank, round cylinder in shape, atmospheric pressure, internal and external corrosion protection as specified. In addition to specified requirements, tanks shall be fabricated in accordance with Steel Tank Institute (STI) design standards by manufacturer that participates in STI Quality

Assurance Program.

B. Construction:

1. ASTM A36/A36M steel, conform to UL 142. Inner and outer tanks of double wall tanks shall both conform. Provide label of conformance.

2. Conform to NFPA 30 or NFPA 31 as applicable.

3. Double-wall, insulation between walls, conforming to STI F941

"Fireguard" construction, and to UL 2085. Provide label of conformance.

4. Design for surcharge load produced by tank-mounted platforms and platform loadings shown. Design tanks for saddle supports furnished by tank manufacturer.

5. Leaks and abrasions are prohibited. Maximum permissible out-of-roundness of cylindrical shells is one percent of the diameter.

6. Provide lifting lugs for rigging tanks.

7. Make provisions for leak detectors to be installed at lowest part of interstitial space between walls of double-wall tanks.

C. Platforms, Stairs, Ladders and Handrails: Provide welded steel assemblies as shown, conforming to OSHA requirements. Provide welded steel tank attachments designed to support platform framing, stairs, ladders and live and dead loadings. Clean and coat all surfaces as specified for tank and steel dike exterior. Galvanizing is an acceptable alternative.

D. Factory Cleaning: Clean interior and exterior of tanks and steel dikes

(if furnished). Remove mill scale, dirt, rust, oil, welding debris, Correct Electrical Deficiencies

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23 10 00 - 8 loose coatings and coatings incompatible with fuel stored or protective coating. Sandblast exterior in accordance with NACE 3.

E. Factory Coating: Provide tanks and steel dikes (if furnished) with exterior coat of rust resistant metal primer, specified under Section

09 91 00, PAINTING. Coat interior from bottom of tank to (3 feet) above bottom in compliance with API RP 1631.

F. Field Painting: Clean and coat all surfaces as specified in Section 09

91 00, PAINTING.

G. Pipe Connections to Tanks:

1. Conform to UL 142.

2. Pipe sizes (2 inches) and smaller, threaded. Pipe sizes (2-1/2 inches) and larger, flanged, (150 psig) ASME rating.

3. Welded joints required on steel piping located inside tanks.

4. Provide and coordinate tank connection quantities, sizes and types with requirements of tank level gauge unit; sounding rod; vent, fill, supply and return pipes; and other pipes as shown.

5. On double-wall tanks, provide valved drain of interstitial space.

H. Internal Ladder: Provide as shown with (2-inch x 1/4 inch) sides and

(3/4 inch) diameter rungs at (12 inches) on center. Provide slide supports to allow for tank movement.

I. Wear (Striker) Plates: Provide (12 inch) square, (1/4 inch) thick steel plates welded to tank bottom directly under the sounding opening, the fuel return discharge, and the fill discharge.

J. Lifting Lugs: Provide for rigging tanks.

K. Emergency Relief Vents for Fire Exposure: Venting capacity shall conform to NFPA 30 or NFPA 31 as applicable. Standard product of a manufacturer designed to automatically open at tank pressure of (2.5 psig) gauge. Aluminum or cast-iron construction with Teflon seating surface. Provide separate vents for primary and secondary tanks.

L. Provide fittings for grounding per NFPA 70.

2.2 SOIL SEPARATOR MAT

A. Material: Porous, non-woven polypropylene geotextile, Weight: (4 ounces per square yard), resistant to all alkalies and weak acids.

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2.3 TANK AND PIPING ACCESSORIES

A. Vent Caps: Galvanized cast iron or cast aluminum with brass or bronze screens, arranged to permit full venting and to prevent entry of foreign material into the vent line. Same pipe size as vent pipe.

B. Fill Boxes:

1. Spill-container type enclosing a fill cap assembly with camlock hose connector with closure coordinated with fittings used by fuel supplier.

2. Watertight assembly, cylindrical body, quick-opening corrosion-resistant watertight sealable cover, polyethylene spill containment compartment with minimum 10 gallon capacity. Integral drain valve with discharge to fill pipe.

3. Fill cap shall be lockable, tight-fill design with provision for padlock on the top of the cap. Fill cap shall screw onto threaded adapter that can be removed without removing fill box. Entire assembly shall seal tight with no leakage during filling and when cap is in place.

4. Provide special tools necessary for opening fill boxes and fill caps.

5. Protect spill container from traffic by ramped, drain-slotted cast iron body ring and cover. Design shall prevent transmission of traffic loads to the underground tank. Spill-container type not required at locations designated only for sounding tanks.

C. Fill caps located above grade without fill boxes shall be lockable, tight-fill design, operated by special wrench that shall be furnished.

Entire assembly shall seal tight with no leakage during fill and when cap is in place.

D. Refer to Section 05 50 00, METAL FABRICATIONS, for access platforms shown for aboveground tanks.

E. Support horizontal portion of pipes located inside tank every (7 feet) maximum.

F. Furnish gauging chart, liters versus gallons versus inches depth.

G. Furnish sounding rod for each tank size. Mark rods in increments representing five percent of tank capacity. Provide length of rod suitable for tank burial depth (if applicable). Rods shall be graduated in gallons.

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H. Fill Point Identification:

1. The storage fuel tank shall read: “Diesel Fuel fill” with aluminum, brass or bronze plate, anchored to concrete fill box pad with stamped or engraved letters (3/4 inch) high.

2. Fill Caps above Grade: Aluminum, brass or bronze plate, clamped to fill pipe, with stamped or engraved letters (3/4 inch) high.

2.4 PIPING, VALVES, FITTINGS

A. Fuel supply and return, tank fill, vents, sounding, and pump out.

B. Steel Pipe and Fittings:

1. Piping: Steel, seamless or electric resistance welded (ERW), ASTM

A53/A53M Grade B or ASTM A106/A106M Grade B, Schedule 40.

Aboveground piping shall be painted. Refer to Section 09 91 00, PAINTING.

2. Joints: Socket or butt-welded. Threaded joints are prohibited except at valves, unions and tank connections.

3. Fittings:

a. Butt-welded joints: Steel, ASTM A234/A234M, Grade B, ASME B16.9, same schedule as adjoining pipe.

b. Socket-welded joints: Forged steel, ASME B16.11, (2000 psig) class.

4. Unions: Malleable iron, (300 psig) class.

5. Companion flanges: Flanges and bolting, ASME B16.5.

6. Welding flanges: Weld neck, ASME B16.5, forged steel ASTM

A105/A105M, (150 psig).

C. Glass Fiber Reinforced Plastic (FRP) Pipe and Fittings:

1. Conform to UL 971 and ASTM D2996 using a filament-winding process and epoxy or vinyl ester resins.

2. Design pipe, fittings and joining system for required fuel service, 65 degrees C (150 degrees F), (150 psig) pressure, (20 inches Hg) vacuum.

3. Provide an integral resin-rich liner, (0.020 inches) minimum thickness to enhance the corrosion resistance. Outer layer shall include ultra-violet inhibitors. Joining adhesive shall be designed for the pipe furnished and shall be supplied by the pipe manufacturer.

4. Plastic piping allowed in underground use only.

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D. Check Valves - Fuel Pump Suction.

1. Pipe Sizes (2 inches) and under: Rated for (200 psig) water-oil-gas, swing-type, threaded ends, ASTM B62 bronze body. Provide union adjacent to valve.

2. Pipe Sizes (2-1/2 inches) and above: Rated for (200 psig) water-oil-gas, swing-type, (125 pounds) ASME flanged ends, ASTM A126 class B cast iron body.

E. Foot Valves - Fuel Pump Suction: Double poppet, lapped-in metal-to-metal seats, double-guided stems, 20 mesh inlet screen, same size as fuel suction piping. Foot valve shall be removable to above grade through the tank manhole enclosure or through extractor fitting.

F. Extractor Fittings: Arranged to permit removal of foot valves, overfill prevention valves, and other devices that are located below grade.

Access point shall be through a cast iron fill box-type manhole located at grade. Provide extractor wrench.

G. Overfill Prevention Valve: Aluminum automatic valve designed for underground or aboveground tanks, as applicable. Removable through the extractor fitting on underground tanks. Locate valve near the top of the tank in the fill pipe. On underground tanks with gravity fill, provide two stage automatic float-operated valve. First stage operation at 92 percent tank capacity shall reduce flow to (5 gpm) or less.

Second stage operation shall stop flow completely when tank is no more than 95 percent full. On aboveground tanks, or tanks pressure-filled, provide single stage valve, rated for fill flow and pressure, which stops flow completely at 95 percent of tank capacity. Valve shall include method for draining oil trapped above the valve into the tank.

2.5 LEAK DETECTION SYSTEMS

A. Automatic digital continuous monitoring systems responsive to the presence of water and hydrocarbons in the interstitial space of the double-wall tanks, in the tank manhole access enclosures, and in the secondary containment of fuel piping systems. System shall distinguish between hydrocarbon and water and identify location of leak as to individual tank and piping system.

B. Functions and Arrangement:

1. Single control station to monitor all sensing probes.

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2. Visual indicator to monitor and identify leaks as water or hydrocarbon and location.

3. Indicators showing system status including faults and alarms.

4. On board printer that provides complete reports of all system functions upon command.

5. Panel circuit test button.

6. 95 dB audible alarm with silencing control to sound when leak is detected.

7. Eight-hour memory backup system with battery.

8. NEMA 250 Type 4 cabinet.

9. UL or other accredited testing laboratory listing.

C. Sensors:

1. Designed for required locations including: Insertion between walls of double-wall tanks, in sumps in double-wall piping systems and in tank manhole enclosures. Sensing points shall be at lowest point of each tank or sump. Intrinsically safe design.

2. Sensing units shall detect presence of water and a minimum (1/8 inch) thick layer of hydrocarbon on surface of water and minimum (2 inch) thickness of hydrocarbon in area that has no water present.

3. Sensors shall be arranged to allow replacement of individual sensors without disturbing other portions of leak detection system or fuel storage and piping system. Underground sensors shall be accessed through caps as grade.

4. Materials of construction shall be non-corroding.

5. Transmit status signal to control unit.

D. Components:

1. Provide manholes at grade for each sensor cap similar in construction to fill boxes. Manholes shall be cast iron, quick-opening cover, watertight, minimum size necessary to accommodate sensor caps. Provide identification plates, similar to those specified for fill points, labeled “MONITORING/OBSERVATION WELL-DO

NOT FILL”. Provide special tools if necessary for opening covers.

2. Sensor housings from tank and piping to grade shall be Schedule 40

PVC, or stainless steel.

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3. Underground wiring between probes and control unit: Place in water-tight corrosion-resistant conduit system conforming to Section 26 05

41, UNDERGROUND ELECTRICAL CONSTRUCTION.

2.6 TANK FLUID LEVEL MONITOR AND ALARM SYSTEMS

A. Digital systems for central monitoring of fuel and water levels in all fuel oil storage tanks in the project. High and low level visual and audible alarms. Volumetric tank-tightness testing. Complete with all transducing, transmitting, and receiving devices. On board printer to provide complete report of all system functions upon command.

B. Fluid Level Monitor:

1. Digital continuous readout, showing tank oil and water levels in gallons, smallest reading one gallon. Provide identification of product measured, measuring units, and the tank number.

2. Tank and fuel characteristics contained in preprogrammed non-volatile field-replaceable databases. Protected power supply.

C. High and Low Fluid Level Alarm System:

1. Automatic continuous on-line monitoring of all tanks.

2. Visual and audible indicators combined with fluid level monitor.

Identify the tank that is in alarm condition.

3. Manual alarm test and silencing controls.

4. Low level alarm actuation adjustable 0-25 percent of tank capacity.

High level alarm actuation adjustable 75-100 percent of tank capacity.

D. Locate all indicators, selector switches, alarms on face of wall-mounted NEMA 250, Type 4 panel.

E. Remote Alarm Annunciator:

1. Visual and audible high-level alarms adjacent to tank fill box locations. Locate in NEMA 250 Type 4X weatherproof exterior wall or pole-mounted panels.

2. Alarm shall include flashing red light with 180-degree visibility for each tank and 95 dB horn or (4 inch) diameter bell. Provide alarm silence control.

3. Provide identification sign: "WHEN ALARM SOUNDS - FUEL TANK FILLED

TO CAPACITY - DO NOT OVERFILL".

F. Modbus communication to indicate tank fluid level and alarm conditions.

Telephone modem communication capability.

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G. System Performance: Accuracy plus or minus (0.10 inch) of fluid height in inventory mode and (0.01 inch) in leak detection mode. Automatic compensation for fluid temperature changes. Volumetric tank tightness sensitivity of (0.1 gph).

H. Sensors:

1. Provide sensor types such as magnetostrictive, capacitance, float, hydrostatic and other types as necessary for the applications.

2. Apply in accordance with manufacturer’s instructions with provisions for easy future replacement without need for excavation.

3. Provide for each hydrostatic sensor a constant flow differential pressure regulator and transmitter protected from fuel contamination. Air supply shall include filter and over-pressure protection. Provide desiccant-type dryer on air supply designed for removal of water vapor. Dryer rating, minimum (10 SCFM). Provide moisture indicator. Dryer may be deleted if air supply source has a refrigerated dryer.

4. Float-type units shall be designed for installation and removal through a (4 inch) diameter vertical pipe mounted in the top of the tank.

I. Underground Wiring and Piping: Enclose in water-tight corrosion-resistant conduit system sized and arranged as recommended by system manufacturer and conforming to Section 26 05 41, UNDERGROUND ELECTRICAL

CONSTRUCTION.

J. Code Conformance: NFPA 70.

2.7 FUEL OIL QUALITY MAINTENANCE SYSTEMS

A. Complete factory-assembled automatic particulate filtration and dewatering and fuel additive injection system to maintain the purity of

No. 2 fuel oil in storage. The system shall circulate the oil from the storage tank, through the system, and back to the storage tank. Provide quantity and capacity of systems to serve tank as shown, connected to the tank fuel pump system and return pipes. Smaller systems without large water storage tanks and without fuel additive injection shall be wall-mounted. Units with water storage tanks and/or additive injection shall be floor-mounted on steel skids on concrete foundations. Digital controls.

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B. Performance: Design for nearly 100 percent water removal. Provide 2-micron particulate filtration. Each system shall have capacity to turn over the largest connected full tank one time within 22 hours maximum.

System shall be designed to allow continuous operation with brief interruptions to manually change filters and clean strainers.

C. Components:

1. Strainer: 100 mesh perforated stainless steel basket. Clamped covers. (125 psig) design pressure.

2. Water Separation Unit: Two stage, designed to reduce water content of fuel to less than 10 ppm. Centrifugal separator for removal of large droplets and renewable resin-impregnated cellulose water coalescing elements. Water removed shall flow to water holding sump in the unit. Water sensing probe to alert the operator when water level in bowl has reached capacity.

3. Filter: 2-micron filtration with 96 percent removal efficiency, valved manual drain. Replaceable elements.

4. Filtration Pump: Positive displacement base-mounted pump with cast iron or bronze housing, for circulating the oil from the storage tank, through the water separation and filter units and back to the storage tank. Pump shall have carbon bushings, stainless steel shaft and Teflon mechanical seal, ODP motor.

5. Controls:

a. Digital PLC electronic controls for all system control and alarm functions. Relay logic not acceptable.

b. Control panel with selector for modes of operation, indicators to show system status, and visual and audible alarms to signal the need for operator intervention. Operator interface shall be 2 x

20 LCD and keypad.

c. Controls shall include:

1) Control power “on-off”.

2) “Cycle Start”.

3) “Cycle Cancel”.

4) “Hand-off-Auto” for filtration pump.

5) Pump cycle timer set function.

6) Cycle duration selector.

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d. Indications shall include:

1) “Control Power On”.

2) “Pump Run”.

3) “Pump Failure”.

4) “Excess Water in Fuel”.

5) “Filter Water Level High”.

6) “Rupture Basin Leak” alarm.

7) “High Pressure Drop in Strainer” alarm.

8) “High Pressure Drop in Filters” alarm.

9) “High Pressure” alarm and automatic shutdown.

e. Filter and strainer differential pressure gauges, differential pressure switches and control. Provide indication when filters should be changed.

f. Over pressure switch and control to shut down pump if filter inlet pressure exceeds limits.

g. All primary wiring exiting the enclosure shall be encased in conduit.

h. Magnetic motor starters with overload protection.

i. Circuit breakers.

j. Control enclosure shall be NEMA 4, fully gasketed doors with 3 point lockable latching. Interior shall have white gloss finish;

exterior shall be chemical-resistant gray enamel. All controls and indicating devices shall be mounted on front of enclosure and labeled with black Phenolic labels with white lettering.

D. Enclosure – Wall Mounted Units: 14-gauge steel, NEMA Type 4 enclosure, continuously welded, framed cabinet. Provide doors for complete access to all equipment. Doors shall have a turned edge, piano hinges, three-point locking mechanisms. Corrosion-resistant prime and finish coatings on all interior and exterior surfaces.

2.8 CONCRETE FOUNDATIONS

A. Concrete ballast foundations for concrete pads for aboveground tanks are specified under Section 03 30 00, CAST-IN-PLACE CONCRETE. Ballast foundations shall be sized for buoyancy of entire tank when empty.

Credit for overburden is allowed.

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2.9 BURIED UTILITY WARNING TRACING TAPE

A. Tape shall be (0.004 inch) thick, (6 inches) wide, yellow polyethylene with a metallic core, acid and alkali-resistant and shall have a minimum strength of (1740 psig) lengthwise and (1500 psig) crosswise with an elongation factor of 350 percent. Provide bold black letters on the tape identifying the type of system. Insulating and labeling shall be unaffected by moisture and other substances contained in the backfill material.

PART 3 - EXECUTION

3.1 GENERAL

A. If an installation is unsatisfactory to the COR (Contracting Officer

Representative) the Contractor shall correct the installation at no additional cost or time to the Government.

3.2 INSTALLATION AND TESTING, UNDERGROUND STEEL TANKS

A. Conform to NFPA 30 or NFPA 31 as applicable.

B. Install tanks on (6 inch) thick beds of clean, washed, inert sand that is placed on concrete foundation. Secure tank to concrete ballast foundation with specified straps. Slope tank. Completed tank installation shall successfully resist buoyant forces of flooding to top of tank when tank is empty.

C. After tanks are set in place, prior to backfilling, test tanks by applying internal air pressure of (5 to 7 psig). Also test air space between tank walls at pressure recommended by tank manufacturer. Repair leaks in steel tanks by chipping to bare metal and rewelding. Repair leaks in plastic tank jackets (if furnished) as recommended by tank manufacturer. Retest tanks until all leaks are repaired. Test manhole enclosures by filling with water and proving no leakage for 24 hours.

Tests shall be witnessed by COR (Contracting Officer representative).

D. Prior to backfilling, repair all damage to tank coating with the same coating material. Coat all metal parts that will be below grade, including tie-down fittings and straps, bolts, rings, pipes, with the tank coating material. Perform 10,000-volt holiday test on all areas of coating which have been repaired.

E. Excavation, trenching and backfilling around the tanks is specified under Section 31 20 00, EARTHWORK. Backfill material shall be same as bedding material and shall conform to printed instructions of tank

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23 10 00 - 18 manufacturer. In addition, there shall be no stones, ashes, or corrosive materials in contact with the tanks. Unstable and unsuitable soil shall be removed and replaced with suitable material. Provide a soil separation mat to keep soil separate from sand and pea gravel.

Minimum depth of cover shall conform to NFPA 30 or NFPA 31 as applicable. After completion of backfilling, measure tanks internally for out-of-roundness (deflection).

F. Do not place fluid in the tank until the backfilling and the piping connections to the tanks are complete, and the tanks have been inspected internally by the COR (Contracting Officer Representative).

Keep the tank excavation dewatered.

3.3 INSTALLATION AND TESTING, ABOVEGROUND TANKS

A. Conform to NFPA 30 or NFPA 31 as applicable.

B. Support tanks on steel saddles welded to the tanks. Anchor to concrete foundations. Provide molded neoprene isolation pads between the steel supports and the concrete foundation.

C. After tanks are installed, test steel tanks with air pressure of (3 to

5 psig), using soapsuds to locate leaks. Repair leaks by chipping to bare metal and rewelding. Retest until all leaks are repaired. Repair all damaged areas of prime coat on tanks and steel dikes (if furnished). Test interstitial area between steel tank walls with air at pressure recommended by tank manufacturer. Tests shall be witnessed by the COR (Contracting Officer Representative).

D. Provide electrical grounding in accordance with NFPA 70.

3.4 INSTALLATION AND TESTING, UNDERGROUND PIPING SYSTEMS

A. Leak Detection System: Arrange fuel and tracing media (if required for heated oil) carrier piping, enclosed in secondary containment piping, to accommodate leak detection system. Slope piping down toward tanks and leak detectors at (1 inch in 40 feet).

B. Steel Fuel and Tracing Media Carrier Piping: All joints butt or socket welding. Threaded piping is prohibited. Piping ends shall be accurately cut, true, and beveled for welding.

C. Glass Fiber Reinforced Plastic (FRP) Fuel Carrier Piping and Secondary

Containment Piping: Install in accordance with printed instructions of pipe manufacturer. Installation personnel trained in accordance with

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23 10 00 - 19 paragraph, QUALITY ASSURANCE. Plastic piping is prohibited in the same secondary containment system with steam or condensate piping.

D. Secondary Containment Piping:

1. Provide sand bedding and backfill material for steel piping and pea gravel for FRP piping.

2. Top of system (18 inches) minimum below grade.

3. Design and locate leak detector sumps to intercept all potential leakage. Maximum spacing along each system, (10 feet).

4. Seal all building and manhole wall penetrations with a modular, watertight flexible penetration seal system. The modular penetration seal shall have a nitrile rubber seal, or if a fire separation is required, a high temperature silicone fire seal.

5. After placing system, prior to backfill, repair all damage, including coatings, as recommended in printed instructions of system manufacturer. Perform 10,000-volt holiday test on coated steel systems.

6. Fuel oil piping is prohibited in the same secondary containment system as steam or condensate piping.

7. On steel systems that do not have FRP cladding, install cathodic protection system.

E. Anchorage of System: When heated oil system is provided, anchor systems and provide expansion loops and bends as shown and as recommended by manufacturer of system. Pipe stress due to thermal expansion shall not exceed the limits in ASME B31.1.

F. Leak Test: Test carrier pipes with air pressure at (100 psig) and test the containment piping with air pressure at (8 psig). Systems shall hold the pressure for 30 minutes. Repair all leaks and retest.

G. Coatings for Steel Piping not in Secondary Containment System: Provide urethane coating and cathodic protection.

3.5 INSTALLATION, FILL BOXES AND ACCESS MANHOLES AT GRADE

A. Provide for tank fill, tank sounding, leak detector sensors, and extractor fittings. Set at grade in concrete pads. Refer to fill box detail. Provide identification plate set into the concrete pad that identifies the purpose of the device and type of fuel in the tank.

3.6 INSTALLATION AND TESTING, LEAK DETECTOR SYSTEMS FOR TANKS AND PIPING

A. Wiring shall conform to NFPA 70.

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B. Locate control monitor panels (5 feet) above the floor on inside wall of boiler room, generator room or garage, depending on type of fuel tank served, unless shown otherwise.

C. Test operation of each probe, and monitoring system with fuel and water. If type of probe utilized is damaged by exposure to fuel, provide temporary probe for testing monitoring system.

3.7 INSTALLATION, TANK FLUID LEVEL INDICATOR AND ALARM SYSTEM

A. Wiring shall conform to NFPA 70.

B. Locate level indicator and alarm panel (5 feet) above the floor on inside wall of boiler room, generator room or garage, depending on type of fuel tank served, unless shown otherwise.

C. Locate remote high-level alarm on exterior wall or pole in view of tank fill point, (8 feet) above grade.

3.8 INSTALLATION, BURIED UTILITY WARNING TRACING TAPE

A. Install tracer wire in the trench approximately (18 inches) above the non-metallic pipe. The tracer wire shall be taped approximately every

(10 feet) to the pipe, where practical. The tracer wire shall be installed so that electrical continuity is maintained throughout the pipe system. As few connections as possible shall be made in the tracer wire. The wire shall be contiguous except at test stations, valve boxes, and where splicing is required. All splices shall be encased.

Connections will be made by stripping the insulation back one inch and joining the two ends using an approved mechanical connector and a split bolt connector. Twisting of copper wire is prohibited. To complete this connection, wrap all exposed wire thoroughly with electrical tape. A minimum (5 foot) of additional tracer wire will be coiled, buried and terminate aboveground at the ends of the pipeline.

3.9 INSTALLATION, FUEL OIL QUALITY MAINTENANCE SYSTEMS

A. Locate systems within easy reach of persons standing on floor, with sufficient elevation to allow gravity flow of water from system to water storage tank sitting on the floor.

B. Connect to tank suction and return piping systems with isolation valves. Provide compound pressure gauges at suction and discharge piping connections. Refer to Section 23 09 11, INSTRUMENTATION AND

CONTROL FOR BOILER PLANT for gauge requirements.

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3.10 TANK MANHOLE ENCLOSURES

A. All pipe penetrations shall be leak tight permitting no groundwater into enclosure.

3.11 STARTUP AND TESTING

A. Perform tests as recommended by product manufacturer and listed standards and under actual or simulated operating conditions and prove full compliance with design and specified requirements. Tests of the various items of equipment shall be performed simultaneously with the system of which each item is an integral part.

B. When any defects are detected, correct defects and repeat test at no additional cost or time to the Government.

3.12 INSTALLATION, CATHODIC PROTECTION TEST STATIONS

A. Provide separate station for each tank and each piping system, anchor firmly, locate so that terminal board is (2 feet) minimum above grade.

Connect wiring from all anodes and protected structures to the test stations.

3.13 TESTING, CATHODIC PROTECTION

A. Testing performed by NACE-certified corrosion specialist; witnessed by

COR (Contracting Officer Representative).

B. Test Instruments:

1. Voltammeter.

2. Saturated copper-copper sulfate reference electrode.

3. Other instruments as required.

C. Procedures: Conform to NACE SP0169.

D. Test Results Required for Acceptance:

1. Potential of minus 0.85 volt between protected structure and reference electrode.

2. Minimum shift of minus 300 millivolts upon application of protective current. Voltage measured between protected structure and reference electrode.

3. Minimum shift of minus 100 millivolts upon interruption of protective current. Voltage measured between protected structure and reference electrode.

E. Test Report: Provide complete report to COR (Contracting Officer representative) showing all test measurements, calculations, list of instruments used.

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3.14 DEMONSTRATION AND TRAINING

A. Provide services of manufacturer’s technical representative for 4 hours to instruct each VA personnel responsible in operation and maintenance of the system.

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