Washington State DUI

DUI Breath Test Laws

WAC 448-16-030

(1) "Accuracy" means the proximity of a measured value to a reference value.
(2) "Alcohol" means the unique chemical compound ethyl alcohol.
(3) "Blank test" means the testing of an instrument to ensure that no alcohol from a previous test can interfere with a person's breath test.
(4) "Concentration" means the weight amount of alcohol, expressed in grams, contained in two hundred ten liters of breath or alcohol/water vapor.
(5) "Data entry" means the process of providing information through a keyboard to the instrument for the purposes of (a) identifying a breath test document to an individual and (b) statistical analysis.
(6) "Interference" means a test result whose infrared absorbance properties are not consistent with ethanol.
(7) "End expiratory air" means the last portion of breath to be delivered to the instrument once the appropriate sample acceptance criteria have been met.
(8) "External standard test" means the use of a simulator containing a certified simulator solution, to provide a known alcohol vapor concentration to test the accuracy and proper working order of the instrument. This test of the function of the instrument is performed with every breath test. The external standard test does not calibrate the instrument.
(9) "Internal standard test" means the use of a quartz filter to provide a check that the instrument has maintained calibration since the last time calibration was performed and is in proper working order at the time of the test.
(10) "Precision" means the ability of a technique to perform a measurement in a reproducible manner.
(11) "Simulator" means a device which when filled with a certified simulator solution, maintained at a known temperature, provides a vapor sample of known alcohol concentration.
(12) "Valid breath sample" means a sample of a person's breath provided in such a manner to be accepted for analysis by the instrument.

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