The document below contains approved recommendations from the working group. They are recognized to be minimum standards and may be revised as new analytical techniques, scientific knowledge and legal requirements evolve. The current version was updated November 1, 2013. Changes have been highlighted in red text.
All other versions are obsolete and can be viewed under the archived section of this website. Also, please note that the offical version of the document is the Adobe format below, the HTML format is only provided for quick referencing.