PART 3000 METALS Part Coordinator Randy A. Gottler JOINT TASK GROUP CHAIRS FOR THE 22ND EDITION 3020 Quality Assurance/Quality Control ..................................................................Cindy A. Bamfield 3125 Metals by Inductively Coupled Plasma/Mass Spectrometry ....................................Robert Henry 3500-Cr Chromium .............................................................................................................Rock J. Vitale SUMMARY OF MAJOR CHANGES SINCE 2005 Quality Assurance/Quality Control (3020) was significantly revised to stay abreast of regulatory requirements and clarify the essential quality control practices for test methods in Part 3000. Metals by Inductively Coupled Plasma/Mass Spectrometry (3125) contains updated QC requirements, including frequency and default limits, to make it consistent with current regulatory requirements. It also incorporates collision cell technology. Chromium (3500-Cr) contains updated preservation requirements and extends the holding time for hexavalent chromium. The brief metal sections that do not contain methods in themselves (they merely refer users to appropriate detection methods) have been combined into a new section: Other Metals (3500). Also, many methods now refer users to the quality control practices that are considered to be an integral part of the method.