Washington State DUI

DUI Breath Test Laws

WAC 448-16-050
Test defined.

A test of a person's breath for alcohol concentration shall consist of the person insufflating end-expiratory air samples at least twice into the instrument, sufficient to allow two separate measurements. There will be sufficient time between the provision of each sample to permit the instrument to measure each sample individually. Two valid breath samples, provided consecutively, will constitute one test.

The instrument will perform this test according to the following protocol when being employed to quantitatively measure an individual's breath alcohol concentration. Successful compliance with each step of this protocol is determined from an inspection of the printout of results. These steps are necessary to ensure accuracy, precision, and confidence in each test.

Step 1. Data entry.
Step 2. Blank test with a result of .000.
Step 3. Internal standard verified.
Step 4. First breath sample provided by subject.
Step 5. Blank test with a result of .000.
Step 6. External standard simulator solution test. The result of this test must be between .072 and .088 inclusive.
Step 7. Blank test with a result of .000.
Step 8. Second breath sample provided by subject.
Step 9. Blank test with a result of .000.
Step 10. Printout of results.


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