Special Proficiency Update November 28, 2011

New proficiency testing (PT) criteria have been issued by TNI and will be in effect for all approved PT providers and will affect all U.S. laboratories. Effective January 3, 2012, the new criteria for the Drinking Water and Solids and Chemical Waste PT studies will be in effect. The new criteria for the Non-Potable Water studies took affect in October 2011. If you would like to review the changes, please visit The Fields of Proficiency Testing web page for more information.

Information Update #110 November 4, 2011

• Director Approved
• Alkalinity
• Preservation of Phenol samples by EPA 420.1
• Status of Method Update Rule

Information Update #109 October 5, 2011

• Email Notification of Updates
• Data Qualifier Subcommittee
• MDL Procedure - alternate approaches
• AZ 8260 Fuels list and survey
• Director Approved
• Luminescence Dissolved Oxygen (LDO)
• Paint Filter Tests
• Alkalinity

Information Update #108 July 15, 2011

• New Director Approved Methods
• Calibration Training on Web
• Request for changes to data qualifier list
• Inspection Appraisal Forms now in online format
• ERLN Membership deadline

Information Update #107 January 28, 2011

• New Program Manager
• Medical Marijuana Draft Rules
• Additional analytes for TO-15
• Fecal Coliform by Colilert-18 ATP
• Memo on Spiking Samples in SW-846 Organic Extraction Methods

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