Nev. Admin. Code § 554.470 - Procedure for installing duct systems in railway cars or vans
1. Lay out the inside probe and duct system
on top of the load. Insert the probes down the center of the load at 4-foot
intervals to a depth near the floor. Both end probes must be placed 2 feet from
the end of the car. Seal the door of the car through which intake and exhaust
tubes from the blower will connect to the probe-duct system as provided in this
section.
2. Heavy laminated paper
must be placed in the doorway on the outer side of the wooden grain door and
sealed to the doorfacing and doorsill by masking tape. The top edge of this
paper must be lapped over and fastened to the top edge of the wooden grain
door. The remainder of the opening must be covered by a paper grain door to the
ceiling of the car.
3. Loosen the
wooden grain door and slip the bottom edge of the paper door down so as to
overlap the paper on the wooden door. Renail the wooden grain door in place.
Seal this lap of paper grain door to the paper covering on the wooden door
using masking tape. Nail a 1- by 4-inch plank across the top of the paper grain
door inside the car, leaving a sufficient edge of paper above the plank to seal
it with masking tape or "bug" putty. Seal the ends of the paper grain door to
the inside wall of the car with masking tape. Cut two holes in the paper grain
door, one with an 8-inch diameter and one with a 6-inch diameter. These holes
must be cut just above the edge of the wooden grain door so that ducts will
rest on the top of the wooden grain door. Seal an 8-inch collar inserted
through the hole through which the exhaust duct may be inserted. Insert the end
of the inside duct system out through the 6-inch hole so as to protrude about 2
inches beyond the paper grain door and to which the intake duct from the blower
may be attached. Close the opposite door and all other apertures in the car and
seal them with masking tape and "bug" putty so as to make the entire car
gastight.
4. Connect the intake
duct from the blower to the end of the inside probe system extending through
the paper car door. Insert the end of the exhaust duct through the 8-inch
collar in the paper grain door and seal with masking tape or "bug" putty. Start
the blower and introduce the required amount of fumigant. Allow the blower to
operate continuously for at least 10 minutes after the fumigant has been
discharged. Disconnect the intake and exhaust ducts, seal the openings and
close the door of the car. Allow the car to remain undisturbed for 16
hours.
5. "Bug" putty may be
purchased from fumigant supply companies or may be made from 8 parts asbestos,
3 parts calcium chloride and 4 parts water.
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Notes
NRS 554.020, 554.030
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