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placing them in refuse containers in accordance with
recommendations for the safe disposal of pesticide containers. When
treating aircraft, refer to T409 of this manual which lists the cubic
capacity and application schedules for most commercial and military
aircraft. Do not deduct the space occupied by cargo in computing the
required treatment rate.
Equipment
Compressed CO2 or compressed air is used to expel the dust. A
modified CO2 fire extinguisher with a standard release valve may be
used. The 10-pound CO2 capacity extinguisher, which weighs 35 to 40
pounds when full, is convenient and safe for use. Sufficient gas for 25
to 30 releases is contained in this size. Smaller modified extinguishers
are also satisfactory. Compressed air units must be specifically
designed for expelling dust and are not readily available.
Specifically developed micronized dust guns with proper connections
may be available through the Program Support Staff in Riverdale, MD.
Methods and Procedures for Application
Treatment of Passenger Compartments and Cargo Aircraft
All entry doors and other openings should be closed and all ventilation
systems stopped before discharge of dust. The door to the pilot’s
compartment must be closed. On aircraft with a baggage compartment
immediately behind the pilot’s and no door to separate these
compartments, place a screen of plastic or other suitable material
Chemical Treatments Aerosols and Micronized Dusts
Methods and Procedures for Application
10/2002-04 Treatment Manual 2-11-3
PPQ
between the baggage compartment and the pilot’s compartment.
Galleys shall be closed off by means of doors or a screen of plastic,
etc., which will prevent the entry of the pesticide.
The single nozzle gun recoils or kicks back when discharged.
Therefore, it must be held firmly with one hand while the other hand is
used to trigger the release of the CO2. Keep the host between the
extinguisher and the gun as straight as possible to reduce kickback. A
position should be taken much like that used when firing a large
caliber pistol. Rest the bottom of the gun on a solid object if possible.
Kneeling on one knee may be necessary if the host to gun is short. A
1-second blast is sufficient. The discharge nozzle should be directed
above the top of the seats or cargo to assure unimpeded flow of the
dust cloud from the release point.
On smaller types of aircraft, stand behind the first seat to discharge
the dust. Leave the aircraft immediately after release; close the door
quickly to avoid disturbing proper dust distribution.
In larger aircraft, discharge the dust from the front behind the pilot’s
compartment or from the rear depending on location of exit doors.
Remain in the craft only long enough for the dust cloud to appear to
have reached the other end of the craft—about 1 minute. The dust
cloud may not return from the opposite end of the large aircraft.
Judgment should be used by the inspector as to the best location for
firing if partitions are present.
A recently designed gun has two nozzles facing in opposite directions.
Since the gas and dust are expelled from both nozzles, no “kick”
results. The operator should stand in the middle of the large
compartment when firing the charge.
After dust has been discharged, the officer will leave the aircraft, close
the door, and hold the aircraft closed for 10 minutes.
Unless responsible personnel remain near the craft to prevent
inadvertent entry by others, place a treatment notice, PPQ Form 468,
on the entry door. Cargo or passenger area ventilation systems shall
not be in operation during the application and settling periods. After a
15-minute aeration period, the aircraft may be reentered.
Treatment of Separate Cargo Compartments and Containerized
or Palletized Cargo
Cargo compartments in bellies of aircraft will be treated by opening
the doors sufficiently to insert the applicator nozzle. After firing, close
the door quickly and do not open for at least 10 minutes. Treatment of
such compartments may require two people, one to operate the doors
Chemical Treatments Aerosols and Micronized Dusts
Precautions for Both Aerosols and Micronized Dusts
2-11-4 Treatment Manual 10/2002-04
PPQ
and the other to operate the gun. Containerized cargo is treated by
lifting the cover or otherwise inserting the nozzle in the container. After
discharge, the cover should be quickly closed.
Precautions for Both Aerosols and Micronized Dusts
1. Treatment shall not be applied when animals or people are
present.
2. Food should be removed or covered prior to treatment.
　
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