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Chemical Treatments Fumigants • Methyl Bromide • Tarpaulin Fumigation
Preparing to Fumigate
03/2004-05 Treatment Manual 2-4-3
PPQ
◆ Electrical wiring (grounded, permanent type), three prong
extension cords
◆ Exhaust blower and ducts
◆ Fans (circulation, exhaust, and introduction)
◆ Framework and supports
◆ Gas introduction line
◆ Gas sampling tubes (leads)
◆ Heat supply
◆ Insecticides and spray equipment
◆ Loose sand
◆ Measuring Tape
◆ Methyl bromide
◆ Padding
◆ Sand or water snakes or adhesive sealer
◆ Scales or dispensers
◆ Self-contained breathing apparatus (SCBA) or supplied air
respirator
◆ Tape
◆ Tarpaulin and supports (See page-2-4-13 for specifications)
◆ Thermal conductivity unit3, 4
◆ Thermometer
◆ Volatilizer
◆ Warning signs
◆ Tape measure
◆ Thermometer
Preparing to Fumigate
Step 1—Selecting a Treatment Schedule
Select a treatment schedule to effectively eliminate the plant pest
without damaging the commodity being fumigated.
3 If fumigating oak logs or lumber for export, the unit must be capable of reading 400 oz.
4 T/C unit must be calibrated by the Center for Plant Health Science & Technology (CPHST) in Raleigh, North
Carolina. If requested, CPHST will calibrate a commercial fumigator’s T/C unit.
Chemical Treatments Fumigants • Methyl Bromide • Tarpaulin Fumigation
Preparing to Fumigate
2-4-4 Treatment Manual 03/2004-05
PPQ
Turn to the Treatment Schedule Index and look up the available
treatment schedule(s) by commodity (example—apples, pears, or
citrus) or by pest (example—Mediterranean fruit fly). Some
commodities may have several treatment schedules. The
“Fumigants—Methyl Bromide” section on Residual Effects lists those
commodities which may be damaged by MB. Each treatment schedule
lists the target pest or pest group (e.g., Ceratitis capitata, surface
feeders, wood borers...), commodity, or both pest and commodity. If
there is no schedule, contact the Center for Plant Health Science &
Technology (CPHST) in Raleigh, North Carolina, to see if a schedule is
available under a FIFRA Section 18 Exemption. If a treatment is
required, go to Table 2-4-1.
Step 2—Issuing a PPQ Form 523 (Emergency Action Notification)
When an intercepted pest is identified and confirmed by a PPQ Area
Identifier as requiring action, issue a PPQ Form 523 (Emergency
Action Notification) to the owner, broker, or representative. Be sure to
list all treatment options when completing the PPQ Form 523
(Emergency Action Notification). Follow instructions in Appendix 1 for
completing and distributing the PPQ Form 523 (Emergency Action
Notification).
Step 3—Determining Section 18 Exemptions and Sampling
Requirements
After selecting the treatment schedule, you will be able to determine
which treatment schedules are FIFRA Section 18 Exemptions by the
presence of broad, bold, vertical lines on the borders of the treatment
schedule table listed in the reference. Some treatment schedules are
only FIFRA Section 18 Exemptions at specific temperature ranges.
Check the treatment schedule and temperature to determine if the
fumigation will be a FIFRA Section 18 Exemption.
Food or Feed
Fumigations
Residue monitoring by taking samples of the commodity prior to the
start of the fumigation and after aeration is no longer required.
Step 4—Selecting a Fumigation Site
Consider the following factors in selecting a fumigation site:
◆ A well-ventilated, sheltered area
◆ Ability to heat area (in colder areas)
◆ An impervious surface
TABLE 2-4-1: Determine Reporting Requirements
If a treatment is required: Then:
As a result of a pest interception GO to Step 2
As a condition of entry GO to Step 3
Chemical Treatments Fumigants • Methyl Bromide • Tarpaulin Fumigation
Preparing to Fumigate
03/2004-05 Treatment Manual 2-4-5
PPQ
◆ A nonwork area which can be effectively marked and
safeguarded or isolated
◆ Electrical power supply
◆ Water supply
◆ A well-lighted area
◆ Aeration requirements
A
Well-Ventilated,
Sheltered Area
Select sites which are well-ventilated and in a sheltered area. A
well-ventilated site is required for exhausting gas before and when the
tarpaulin is removed from the stack. Most piers and warehouses have
high ceilings and a number of windows/doors which can be used for
ventilation. Some gas will escape from the tarpaulin even in the best
conditions. Avoid areas where strong drafts are likely to occur.
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