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maintained according to the schedules used. Readings on the T/C
unit (Fumiscope or Gow-Mac) if not calibrated for Vikane must be
multiplied by a factor to obtain the actual ounces per 1,000 feet3
present. The Center for Plant Health Science & Technology (CPHST) in
Raleigh, North Carolina, will calibrate these instruments to determine
the exact multiplication factor to use. Be certain that the reading
without the multiplied factor is also registered on PPQ Form 429,
however. Do not use filters containing soda asbestos (Ascarite) with
SF. Fresh desiccant (Drierite) should be used with the T/C unit.
Desiccant should be changed at appropriate intervals to insure
accurate readings.
Replacing Lost Gas
When it appears that additional SF will be needed, the inspector
should use his best judgment to determine the amount of gas to add,
according to the prevailing conditions of tarpaulin tightness or wind
conditions. Usually, 1.6 oz of gas should be added for every ounce of
deficiency in the minimum concentration required.
Aeration
For detailed guidelines, consult the “Aeration” discussion elsewhere in
this manual, under “Fumigants—Methyl Bromide—Tarpaulin
Fumigation—Methods and Procedures,” the Vikane Gas Fumigant
label, and Structural Fumigation Manual. The threshold limit value for
SF is 5 ppm (20 mg/cubic meter), the same as for MB. Since no
colorimetric (“detector”) tubes are available for SF, a suitable
instrument must be used, such as the Interscan GF 1900 or Miran
(calibrated for SF).
Chemical Treatments Fumigants • Sulfuryl Fluoride
Structural Fumigation
2-9-6 Treatment Manual 10/2002-04
PPQ
Structural Fumigation
Refer to the section on MB structural fumigation (or aeration) in this
manual, the Vikane label, and Vikane Structural Fumigation Manual
for a detailed discussion of proper procedures.
When preparing a structure for fumigation with SF, the surrounding
soil should be watered thoroughly at the base of trees, shrubs, and
other ornamental plants around the perimeter of the structure to
prevent loss of fumigant into the soil. Watering around the plants will
protect the roots; however, plants and grass closer than 1 ft may die
even if this precaution is taken.
Before placing the tarpaulin over the structure, be sure to remove
items for which the use of SF is not registered. These include food,
feed, drugs, and medicines. Extinguish all flames (including pilot
lights), unplug all heating elements, and turn off all lights. Open all
internal doors.
Chamber Fumigation
Refer to the section on MB chamber fumigation (and aeration) in this
manual, the Vikane label, and Vikane Structural Fumigation Manual
for a detailed discussion of proper procedures.
The gas will generally be introduced through a volatilizer or heat
exchanger in order to prevent a “fog-out” which could damage the
contents. Introducing a very small amount of gas into a small
chamber, however, is difficult to do with precise accuracy because the
amount introduced must be calculated by weight loss from the
cylinder. The scale used beneath the cylinder must be readable in
ounces or grams, not just in pounds or kilograms.
Shipboard Fumigation
Refer to the section on MB ship fumigation (and aeration) in this
manual, the Vikane label, and Vikane Structural Fumigation Manual
for a detailed discussion of proper procedures. Surface ships (only
those in port) must be fumigated at dock side, and not when the
vessels are underway. Shipboard fumigation is also regulated by the
U.S. Coast Guard (Department of Transportation). That regulation
appears as 46CFR 147A.
Trying to measure out a small quantity of SF in a graduated glass tube (sight
gauge)—which is common practice with MB chamber fumigations—should
never be attempted with SF because the cylinder pressure is much greater,
and the glass gauge may explode and shatter.
Chemical Treatments Fumigants • Sulfuryl Fluoride
Safety and First Aid
10/2002-04 Treatment Manual 2-9-7
PPQ
Safety and First Aid
Read and understand all directions and safety precautions on Vikane
label before applying. Additional information is presented in Vikane
Structural Fumigation Manual. There is no known antidote for SF.
Vikane is odorless. However, the chance of lethal exposure is not
probable unless an individual actually enters the fumigation space. An
SCBA must be worn by anyone in the fumigated areas when the level
exceeds 5 ppm.
Protective Clothing
Wear goggles or full face shield for eye protection during introduction
　
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