Application Methods and Dosage Calculations
Application Methods and Dosage Calculations
This domain tests correct fumigant introduction and the arithmetic that matches the label rate to the measured volume. Most calculation errors come from wrong volume, wrong units, or forgetting temperature and connected-space adjustments.
Core method
- Calculate each treated space in cubic feet: length times width times height.
- Add connected spaces that are part of the treatment.
- Convert total cubic feet to thousands of cubic feet.
- Multiply by the label rate, usually ounces or pounds per 1,000 cubic feet.
- Adjust only as the label allows for temperature, pest, or leakage.
- Convert ounces to pounds if needed: 16 ounces equals 1 pound.
- Record the volume, rate, amount, and calculations.
Worked example
A house measures 40 feet by 30 feet with an 8-foot ceiling, plus a 3-foot-high attic over the same footprint. Living space: 40 times 30 times 8 equals 9,600 cubic feet. Attic: 40 times 30 times 3 equals 3,600 cubic feet. Total: 13,200 cubic feet, or 13.2 thousand cubic feet. At a label rate of 3 ounces per 1,000 cubic feet, the amount is 13.2 times 3 equals 39.6 ounces. Divide by 16: 2.475 pounds. If the label table requires a higher rate at the measured temperature, use that table and show the adjustment.
Traps
- Using cubic yards instead of cubic feet.
- Omitting attic or crawlspace volume.
- Mixing ounces and pounds.
- Applying a temperature correction not on the label.
- Recording the final amount without the volume and rate.
Key points
- Volume equals length times width times height for each space.
- Convert to thousands of cubic feet before applying the rate.
- 16 ounces equals 1 pound.
- Temperature adjustments must come from the label.
- Record volume, rate, amount, and calculation.