A04_Crack_Seal_Trailer_Purchase_Scope_of_Work_(1).doc

Statement of Work

Crack Sealer Melter Trailer Part 1: Scope/Background/Objective

1.1 Scope of Work

The Contractor shall source and provide a Crack Sealer Melter Trailer. This Crack sealer will be a trailer mounted with at least a 125-gallon crack sealer tank with: motorized agitator, diesel heater, boom mounted wand. The crack sealer trailer will need to be delivered to the Joshua Tree National Park Oasis Visitor Center at 74485 National Park Drive, Twentynine Palms CA, 92277.

1.2 Background

The park has a crack sealer trailer, but it is outdated and can’t be repaired. The park is currently renting a crack sealer trailer. To reduce cost and lessen the need to contract for rentals, the park would like to purchase a new crack sealer.

1.2 Objective

The objective of this contract is to provide a crack sealer trailer with at least 125-gallon diesel crack seal melter. Delivery will be required if the source is farther than 50 miles from Twentynine Palms CA.

Part 2:

Contractor Tasks & Supplies. The primary task for the contractor is to source and deliver one crack sealer trailer with the following minimum requirements.

GENERAL SPECIFICATIONS

2.1 The machine shall be capable of dispensing sealant material within one hour of start up at a 70° F (21.1° C) ambient temperature.

2.2 A comprehensive safety manual and operational/maintenance CD shall be supplied with each unit.

2.3 A factory-trained person shall be made available for initial start-up and training in the operation of the melter.

2.4 Temperature indicating devices shall have intervals no greater than 1° F (2.8° C) and shall be calibrated as required to assure accuracy.

2.5 The melter shall have continuous sealant agitation and a mixing system to provide uniform viscosity and temperature of material being applied.

2.6 Crack sealer trailer shall have a minimum of 125-gallon diesel crack seal melter.

3. REQUIRED SAFETY FEATURES

3.1 The unit shall have a safety shut-off on the lid that automatically stops the agitator when the lid is opened.

3.2. The applicator wand shall be equipped with an automatic shut-off feature that will stop the rotation of the sealant pump, sealant flow, and all line pressure when the handle is released or dropped.

3.3 The heat transfer oil shall adequately and efficiently bring the sealant material to application temperature without the use of a heat transfer oil circulation pump. This eliminates the potential exposure of personnel to pressurized hot heat transfer oil.

3.4 The material tank meets all FMCSA requirements for elevated temperature materials by meeting CFR Title 49, Part 173.247.

4.TOWING FRAME AND JACK

4.1 This unit shall be trailer mounted. The longitudinal side frames and tongue members of the trailer shall be on one continuous piece construction composed of hot rolled steel channel having the minimum dimensions of 5 inches (12.70 cm) web, 3/16 inch (.48 cm) thickness with 1.75-inch (4.5 cm) flanges.

4.2 The configuration of the channel shall be cold formed with the flanges on the outside resulting in a one-piece frame member with no cross welding of or on the flanges to avoid any possibility of flange stress cracking.

4.3 The tongue shall be equipped with an appropriate heavy-duty ball or pintle hitch and shall be adjustable in height above ground level from a minimum of 14 inches (35.6 cm), to a maximum of 32 inches (81.3 cm), permitting practically level towing with a wide range of towing vehicles. The towing hitch shall be bolted to the hitch plate for easy conversion to other type hitches.

4.4 A screw-post tongue jack shall be furnished. It shall be heavy duty type with a capacity of 5,000 pounds (2,268 kg). It shall be side mounted and swing away for positive road clearance while under tow.

5.TRAILER RUNNING GEAR

5.1 The unit shall be equipped with a dual independent rubber torsional suspension having a safe load capacity of 3,500 pounds (1,587 kg), electric brakes, modular wheels and ST 205/75R 14-8 tubeless tires (Load Range C). Trailers with springs and shackles are unacceptable as they require more maintenance and reduce ground clearance.

5.2 The unit shall have dual LED taillights, stoplights and turn signals. Lights shall be ICC approved. A license plate holder shall be attached to the driver's side taillight.

5.3 All melter fluid tanks shall be positioned no lower than the deck level and mounted on top of the channel frame members to assure proper ground clearance. Units that have components that extend below the trailer frame are unacceptable.

5.4 The unit shall also be equipped with two safety chains not less than 48 inches (121.9 cm) of .38 inch (.97 cm) coil proof chain attached to the tongue with a drilled type clevis pin on the end attached to the frame and screw type clevis pin on the opposite end.

6.HEATING TANK

6.1 The material heating tank shall be a minimum of 37 inches (93.98cm) in diameter by 28.75 inches (73.02 cm) deep having a minimum capacity of 133.75 gallons (503.3 l) at ambient temperature. Oval or square sided tanks are unacceptable as they allow for uneven agitation resulting in a non-homogenous sealant and uneven heating of sealant.

6.2 The tank will have a rear discharge from the pump and a rear plugged outlet. A double boiler type jacket shall create a reservoir that shall hold a minimum of 34.8 gallons (129 l) and require no more than 40 gallons (152 l) of heat transfer oil at 70° F (21.1° C). (Note: At 500° F (260° C) the heating oil will expand approximately 18%).

6.3 The jacket shall wrap around 100% of the outside area of the circular material tank and bottom and allow for complete circulation of the heated transfer oil.

6.4 The tank and jacket shall be made of not less than 3/16 inch (.94 cm) rolled sheet steel.

6.5 There shall be one plug to allow the entire heat transfer oil system to be drained.

7.HYDRAULIC SYSTEM

7.1 The hydraulic system shall incorporate a hydraulic pump to power the agitation, and pumping system. Belt driven hydraulics is unacceptable.

7.2 All valves shall be solenoid operated by toggle switch and wand handle switch.

7.3 The controls will allow for bi-directional operation of the sealant pump and agitator.

7.4 A flow control valve will be mounted on the rear of the unit to allow the operator to adjust the pump operational speed.

7.5 The minimum 32 gallon (121 l) hydraulic tank will be equipped with an internal 10-micron full flow filter. The filter shall be equipped with a restriction indicator to indicate the need for service. A sight gauge level indicator equipped with a thermometer to measure oil temperature will be mounted on the tank and located where it is easily viewed.

7.6 The unit shall have a self-contained air to oil hydraulic cooler with an electric fan to maintain proper hydraulic oil temperatures.

8. LOADING HATCH

8.1 A low profile opening for loading shall be required at the top of the material tank and shall be located on the curbside of the machine for operator safety. The loading height shall be a minimum of 50 inches (127 cm) and shall not exceed 59 inches (149 cm) for correct ergonomic lifting and fume exposure.

9. HEATING SYSTEM

9.1 The heat transfer oil is heated by one 12-volt 246,000 BTU high efficiency forced air diesel fired burner directly at the bottom of the heat transfer oil tank.

10. DRIVE AND DRIVE CONTROLS

10.1 The motive force to the agitator and material pump shall be hydraulic motors driven by a hydraulic pump.

10.2 The drive controls governing the rotational speed of the material pump shall be controlled by adjustable hydraulic valves.

10.3 The material pump will have infinite speed control and is electrically actuated by a toggle switch on the control panel or a switch on the hand wand.

11. AGITATION

11.1 The sealant material shall be mixed by a hydraulically driven, full sweep vertical agitator with two opposing horizontal paddles and vertical risers attached to the ends. This feature ensures that material remains in complete suspension and that the hot material stays in the lower area of the tank and does not get splashed or thrown to the upper areas of the tank.

11.2 The agitation system shall be chain driven from the hydraulic motor to the agitator.

11.3 The agitator rotates in both directions.

12. SEALANT HOSE AND APPLICATOR WAND

12.1 Both the hose and wand are heated by 24 VAC voltage electric current and are temperature regulated.

12.2 The combination length between the hose and wand shall not be less than 22 feet.

13. ENGINE

13.1 The unit shall be equipped with a diesel engine.

14. DELIVERY

14.1 If the equipment facility is located within a 50-mile radius of Twentynine Palms, CA; park employees can pick the equipment up.

If the equipment facility is located outside of a 50-mile radius of Twentynine Palms, CA; include delivery costs in the quote submittal.

Part 3:

Contract End Items The contract shall be considered complete upon delivery and acceptance of a new crack seal trailer that conforms to the previous listed requirements.