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Taking Safety Measures When Fumigating Structures page-2-7-3
Preparing to Fumigate page-2-7-4
Step 1—Determining Type of Treatment Required page-2-7-4
Step 2—Issuing a PPQ Form 523 (Emergency Action Notification) page-2-7-7
Step 3—Conducting Prefumigation Conference page-2-7-7
Step 4—Preparing Areas to Be Fumigated page-2-7-8
Step 5—Arranging and Operating Fans page-2-7-8
Step 6—Placing Gas Sampling Tubes page-2-7-9
Step 7—Measuring the Temperature page-2-7-9
Step 8—Sealing the Structure page-2-7-10
Step 9—Measuring Volume page-2-7-10
Step 10—Calculating Dosage page-2-7-11
Step 11—Placing the Gas Introduction Line(s) page-2-7-11
Step 12—Making a Final Check page-2-7-12
Conducting the Fumigation page-2-7-13
Step 1—Introducing the Gas page-2-7-13
Step 2—Testing for Leaks page-2-7-14
Step 3—Taking Concentration Readings page-2-7-14
Step 4—Adding Gas page-2-7-14
Step 5—Exhausting the Gas page-2-7-15
Aerating the Enclosure page-2-7-15
Step 1—Securing the Area page-2-7-16
Step 2—Aerating the Structure page-2-7-16
Step 3—Taking Concentration Readings page-2-7-16
Methods and Procedures
The procedures in this section provide guidelines for the methods,
responsibilities, and precautions for structure fumigation. These
procedures relate to structure fumigation primarily for khapra beetle.
In general, structure fumigations present problems not encountered in
other types of fumigations. The large amount of gas required and the
fact that the structure configurations vary from structure to structure
make it essential that experienced fumigators and PPQ officers with
extensive fumigation experience perform structure fumigations.
Chemical Treatments Fumigants • Methyl Bromide • Structure Fumigation
Materials Needed
2-7-2 Treatment Manual 10/2002-04
PPQ
Materials Needed
PPQ Officer Provides
◆ Calculator (optional)
◆ Colorimetric tubes (Draeger/Kitagawa)
◆ Desiccant (Drierite®)
◆ Forms (PPQ Form 429 and APHIS Form 2061 if necessary)
◆ Halide leak detector
◆ SCBA or supplied air respirator
◆ Tape measure
◆ Thermal conductivity unit1
◆ Thermometer
Fumigator Provides
◆ Adhesive sealer, tape, and putty or other pliable material for
sealing off holes around pipes
◆ Auxiliary pump for purging long gas sample tubes
◆ Carbon dioxide filter (Ascarite®)
◆ Colorimetric tubes (Draeger/Kitagawa)
◆ Device for adding nitrogen into MB cylinders
◆ Electrical wiring (ground, permanent type), three prong
extension cords
◆ Exhaust blower and ducts
◆ Fans (circulation, exhaust, and introduction)
◆ Framework and supports
◆ Gas sampling tubes (leads)
◆ Gas supply line
◆ Heat supply
◆ Insecticides and spray equipment
◆ Methyl bromide
◆ Padding
◆ Portable generator as backup unit to operate T/C unit, auxiliary
pump, and lights
1 T/C unit must be calibrated annually by the Center for Plant Health Science and Technology (CPHST) in
Raleigh, North Carolina. If requested, CPHST will calibrate a commercial fumigator’s T/C unit.
Chemical Treatments Fumigants • Methyl Bromide • Structure Fumigation
Taking Safety Measures When Fumigating Structures
10/2002-04 Treatment Manual 2-7-3
PPQ
◆ Sand or water snakes
◆ Scales or dispensers
◆ SCBA or supplied air respirator
◆ Tape
◆ Tarpaulin and supports
◆ Thermal conductivity unit
◆ Volatilizer
◆ Warning signs
Taking Safety Measures When Fumigating Structures
The most important consideration when fumigating structures is the
protection of human life. The commercial fumigator has the following
safety responsibilities when fumigating structures:
◆ Observe all safety precautions while fumigating
◆ Prevent access of unauthorized personnel to the fumigated area
◆ Conduct fumigation properly to result in an effective treatment
◆ Evacuate gas from the structure and aerate when fumigation is
completed
◆ Test, with a gas detector, the fumigated areas within the
structure to ensure freedom from MB before allowing access to
the fumigated areas
The commercial fumigator must abide by the following guidelines
when fumigating structures:
◆ Have a representative present throughout the entire fumigation.
The representative should be familiar with the directions for
using the fumigant, warnings, antidotes, etc., shown on the
label, on the gas cylinder, and contained in the manufacturer’s
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