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and reclaimed rubber including pillows, mattresses, rubber
stamps, and upholstered furniture
◆ Rug pads
Chemical Treatments Fumigants • Methyl Bromide
Residual Effect
2-3-8 Treatment Manual 10/2002-04
PPQ
◆ Silver polishing papers
◆ Woolens (especially angora), soft yarns, and sweaters; viscose
rayon fabrics
◆ Yak rugs
03/2004-05 Treatment Manual 2-4-1
PPQ
Treatment Manual
2 Chemical Treatments 4
Fumigants • Methyl Bromide •
Tarpaulin Fumigation
Contents
Methods and Procedures page-2-4-2
Materials Needed page-2-4-2
PPQ Officer Provides page-2-4-2
Fumigator Provides page-2-4-2
Preparing to Fumigate page-2-4-3
Step 1—Selecting a Treatment Schedule page-2-4-3
Step 2—Issuing a PPQ Form 523 (Emergency Action Notification) page-2-4-4
Step 3—Determining Section 18 Exemptions and Sampling Requirements
page-2-4-4
Step 4—Selecting a Fumigation Site page-2-4-4
Step 5—Arranging the Stack page-2-4-7
Step 6—Arranging and Operating Fans page-2-4-10
Step 7—Placing the Gas Introduction Lines page-2-4-11
Step 8—Placing the Gas Sampling Tubes page-2-4-11
Step 9—Padding Corners page-2-4-13
Step 10—Measuring the Temperatures page-2-4-14
Step 11—Covering the Stack page-2-4-16
Step 12—Sealing the Tarpaulin page-2-4-16
Step 13—Measuring the Volume page-2-4-17
Step 14—Calculating the Dosage page-2-4-17
Step 15—Making a Final Check page-2-4-18
Conducting the Fumigation page-2-4-19
Step 1—Introducing the Gas page-2-4-19
Step 2—Testing for Leaks page-2-4-20
Step 3—Taking Concentration Readings page-2-4-21
Step 4—Determining the Need to Add Gas and Adjust Exposure page-2-4-23
Special Procedures for Adding Gas and Extending Exposure Period page-2-4-23
Special Procedures for Fruits, Vegetables, or Perishable Commodities Using
Schedule T101-a-1 or Equivalent page-2-4-25
Special Procedures for Adding Gas to Oak Logs and Lumber Using T312 or
Equivalent page-2-4-28
Step 5—Exhausting the Gas page-2-4-29
Aerating the Enclosure page-2-4-29
Responsibility for Aerating the Commodity page-2-4-29
Materials Needed page-2-4-30
Securing the Area page-2-4-30
Wearing Respiratory Protection page-2-4-31
Aerating Nonsorptive, Containerized Cargo—Indoors and Outdoors page-2-4-32
Step 1—Installing Exhaust System page-2-4-32
Step 2—Aerating the Commodity page-2-4-32
Aerating Nonsorptive, Noncontainerized Cargo—Indoors and Outdoors page-2-4-33
Step 1—Installing the Exhaust System page-2-4-33
Step 2—Aerating the Commodity page-2-4-33
Chemical Treatments Fumigants • Methyl Bromide • Tarpaulin Fumigation
Methods and Procedures
2-4-2 Treatment Manual 03/2004-05
PPQ
Aeration Procedures for Fresh Fruits, Vegetables, and Cut Flowers—Indoors or
Outdoors page-2-4-35
Step 1—Installing Exhaust System page-2-4-35
Step 2—Aerating the Commodity page-2-4-35
Aerating Sorptive, Noncontainerized Cargo—Indoors and Outdoors page-2-4-36
Step 1—Installing the Exhaust System page-2-4-36
Step 2—Aerating the Commodity page-2-4-37
Aerating Sorptive Commodities in Containers—Indoors and Outdoors page-2-4-38
Step 1—Installing the Exhaust System page-2-4-38
Step 2—Aerating the Commodity page-2-4-38
Methods and Procedures
The procedures covered in this section provide PPQ Officers and
commercial fumigators with the methods, responsibilities, and
precautions for tarpaulin fumigation.
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
◆ Self-contained breathing apparatus (SCBA) or supplied air
respirator to be used by PPQ officer
◆ Tape measure (as back-up for fumigator)
◆ Thermal conductivity unit1, 2
◆ Thermometer (as back-up for fumigator)
Fumigator Provides
◆ Auxiliary pump for purging long gas sample tubes
◆ Carbon dioxide filter (Ascarite®)
◆ Colorimetric tubes (Draeger/Kitagawa)
◆ Desiccant (Drierite®, anhydrous calcium sulfate)
1 If fumigating oak logs or lumber for export, the unit must be capable of reading 400 oz.
2 T/C unit must be calibrated annually 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.
　
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