Past and Current Issues of the Update
August 2006 Update (pdf) - This Update includes information about Proficiency Testing (PT) changes for 2007, Biochmical Oxygen Demand (BOD) requirements, etc.
June 2005 Update (pdf) - This Update includes information about discreet analyzers, DMR-QA Study, and oher updates from the Office.
November 2002 Update (pdf) - This Update contains information on low-level mercury sampling and analysis using EPA Methods 1669 and 1631E, matrix spikes, organic analysis traceability, and other issues.
May 2002 Update (pdf) - This Update includes information regarding PQLs, semi-volatile extraction spiking mixtures, WP and WS Studies, and other information.
November 2001 Update (pdf) - This Update addresses new EPA methodologies, tips on submitting complete application packages, reminders on acceptable PT samples, data submissions, and results.
June 2001 Update (pdf) - This Update gives the website address and addresses personnel changes in the Office. It also discusses the PT schedule.
April 2000 Update (pdf) - This Update includes information regarding PT requirements with an emphasis on the Water Pollution (WP) study. Also included is a list of PT Providers that were approved as of the publication date (4/00).
November 1999 Update (pdf) - This Update includes information regarding Microbiological Certification requirements, the Water Supply (WS) study, and EPA Method 5035 preservation issues.
June 1999 Update (pdf) - This Update includes information regarding Microbiological Certification requirements and holding time requirements.
December 1998 Update (pdf) - This Update includes information regarding many Organic and Microbiological Certification requirements.