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Breath Test Program· WebDMS Notices & Updates

2012 Notices and Updates:

February 2, 2012 - The Washington State Patrol will be transitioning to a new Web Based Discovery Materials Site (WebDMS). This transition is currently scheduled for Wednesday, February 8th, beginning at noon Pacific Standard Time. Users may experience disruptions in service between noon and 3:00 pm on that date and it could take up to 24-hours before all redirects to the new site are established.

What this means for you: The new WebDMS has been incorporated into the main WSP web site. This will provide easier access to other WSP online services and information. Numerous enhancements and upgrades were also made to WebDMS to make it easier to find and download the information from the site.

Please Note: Users will still be able to access the WebDMS site from http://breathtest.wsp.wa.gov/ as well as http://breathtest.wsp.wa.gov/Welcome.htm. However, the http://breathtest.wsp.wa.gov/Default.asp address will no longer work.

For questions, please contact the Breath Test Program at Breathtest@wsp.wa.gov.

2010 Notices and Updates:


December 29, 2010 - A change has been made to the December 13th notice regarding uncertainty tables to clarify that the values described have been computed using the mean of the two breath test results. Please see the December 13th, 2010 notice for more information.

December 13, 2010 - The Washington State Patrol, Toxicology Laboratory Division now provides estimates of breath alcohol measurement uncertainty (confidence intervals) with every Quality Assurance Procedure (QAP) performed. This replaces the recent practice of the Division producing estimates of measurement uncertainty for individual breath alcohol results. Person's submitting individual requests for breath alcohol uncertainty (confidence intervals) to the Washington State Patrol will be directed to use the uncertainty tables present on this website.

To access the uncertainty tables, identify the instrument used for your test and then access the records for the calibration completed prior to the test. These are located in the "Q.A. Forms" drop down list accessed through the "DataMaster Search" section. Measurement uncertainty estimates have been included for all instrument QAP's performed since 2009.

Please note - uncertainty values have been computed using the mean of the two breath test results.

The uncertainty sources and equations can be found in the "BTP Public Records Index" section on this site, under the link "Uncertainty". The production of breath alcohol testing-uncertainty estimates should not be construed as having being reviewed or endorsed by any accrediting organization.

July 15, 2010 - Update: The Washington State Patrol, Toxicology Laboratory Division now provides breath alcohol measurement uncertainty estimates (confidence intervals) as a courtesy to interested parties. The Division will provide this service upon request as resources permit.

The following information must be provided with your request:

  • Name of subject
  • Date of subject breath test
  • Datamaster Instrument number
  • Duplicate breath test results
  • Citation number or subject date of birth
  • Name and address of requestor
  • Contact information for opposing counsel (e-mail or business address)

All requests to be submitted to:
  Toxicology Laboratory Division
  2203 Airport Way S., Suite 360
  Seattle, WA 98134
  Fax: 206-262-6145

February 5, 2010 - The Washington State Patrol, Toxicology Laboratory Division now provides breath alcohol measurement uncertainty estimates (confidence intervals) as a courtesy to interested parties. The Division will provide this service upon request as resources permit; however, this service will not be provided for breath test results between 0.120 and 0.149 g/210L or for results above 0.210 g/210L.

The following information must be provided with your request:

  • Name of subject
  • Date of subject breath test
  • Datamaster Instrument number
  • Duplicate breath test results
  • Citation number or subject date of birth
  • Name and address of requestor
  • Contact information for opposing counsel (e-mail or business address)

All requests to be submitted to:
  Toxicology Laboratory Division
  2203 Airport Way S., Suite 360
  Seattle, WA 98134
  Fax: 206-262-6145

Back to Top2009 Notices and Updates:


December 17, 2009 - Copies of the 'Certificate of Accreditation' and 'Scope of Accreditation' can be found in the BTP Public Records Index section on this site, under the link "ASCLD/LAB Accreditation".

November 17, 2009 - Breath Alcohol Calibration accreditation - on November 16, 2009 the WSP Toxicology Laboratory Division became accredited by ASCLD/LAB-International under the ISO/IEC 17025:2005 general requirements for the competence of testing and calibration laboratories. This accreditation applies to the activities involved with the calibration of breath alcohol measuring instruments and the preparation of calibration reference materials (i.e. simulator solutions). Copies of the Certificate of Accreditation and Scope of Accreditation will be placed on WebDMS upon receipt.

September 1, 2009 - The WSP policies and procedures covering the certification of simulator solutions and the subsequent calibration of the evidentiary breath test instruments have been updated. The updated manuals supersede previous policies and protocols for these activities and can be found in the BTP Public Records Index on this site, under the link “Breath Calibration Manuals.

2008 Notices and Updates:


June 19, 2008 - "Exhibit 2: Thermometers approved to measure the temperature of simulator solutions" has been updated and can be found in the BTP Public Records Index on this site

June 19, 2008 - On March 14th, Dr. Fiona J. Couper became the new Washington State Toxicologist for the Washington State Patrol. Dr. Couper's curriculum vitae can be found in the BTP Public Records Index on this site

February 12, 2008 - The Washington State Toxicologist has published the CR-103 (Permanent Rulemaking Order) for the Washington State Administrative Code Sections regarding preliminary breath testing.

Back to Top2007 Notices and Updates:


November 20, 2007 - The Washington State Toxicologist has published proposed changes to the Washington State Administrative Code Sections regarding preliminary breath testing.

September 28, 2007 - The Washington State Toxicology Laboratory recently changed its procedures for preparing, testing and checking simulator solution batches, and has begun reviewing the data for solutions recently prepared.

The Laboratory is continuing to review the analytical data, certification data sheets, and the affidavits of the analysts for previous batches. Updates will be posted weekly.

August 9, 2007 - The Washington State Patrol Toxicology Laboratory has contacted county prosecutors about an error recently discovered in the calculation of external standard simulator solution reference values. This has resulted in an overestimate by 0.001 to 0.002g/210L in some tests conducted on a breath test instrument in Spokane County (140030), between February 2, 2006, and January 4, 2007.

July 26, 2007 - The Washington State Patrol Toxicology Laboratory prepares and tests simulator solutions used in the DataMaster breath testing instruments. Each batch of solution is prepared by a single analyst. Each batch of solution is then examined and tested by multiple analysts and each analyst signs a certificate for use in lieu of live testimony pursuant to CrRLJ 6.13(c)(1).

All certificates signed by Ann Marie Gordon have been removed from this Web Based Discovery Materials Site (WebDMS) as of July 21, 2007, because Ms. Gordon did not personally examine and test the solutions. This applies only to Ms. Gordon's certificates. All other certificates remain on the website.

The test results themselves have not changed.

July 5, 2007 - The State Toxicologist is reinitiating the process of amending the Washington Administrative Code Section WAC Chapter 448-15 concerning approval of portable breath test (PBT) devices.


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