If you are conducting the confirmation test and you conducted the screening test, you would continue using the same ATF. If you have not conducted the screening test but are conducting the confirmation test, you would have to start with a new ATF and begin with the first eight steps from Unit IV.

1. Explain the testing procedures to the employee.
   Let the employee know that you will be conducting a confirmation test.
2. Explain to the employee that they must observe a 15-minute waiting period and during this time they cannot:

• Eat
• Drink
• Put any object or substance in mouth
• Belch, to the extent possible

Inform the employee that this time period begins with the completion of the screening test, is not to be less than 15 minutes, and the test will be conducted within 30 minutes of the completion of the screening test. Explain to the employee the reason for this requirement is to prevent any accumulation of mouth alcohol leading to an artificially high reading. Stress to the employee that this is for the employee’s benefit.

Explain that the test will be conducted at the end of the waiting period, even if the employee has disregarded the instruction (i.e., has belched, eaten a breath mint).

3. If you become aware that the employee has not complied with this instruction, note so in the “Remarks” section of the ATF.
4. A new mouthpiece is to be used for the confirmation test.

Open an individually sealed mouthpiece in view of the employee and attach it to the EBT, according to the manufacturer’s instructions.