PART 2000 PHYSICAL AND AGGREGATE PROPERTIES Part Coordinator Terry E. Baxter JOINT TASK GROUP CHAIRS FOR THE 22ND EDITION 2020 Quality Assurance/Quality Control ........................................................................Terry E. Baxter 2170 Flavor Profile Analysis ...................................................................................Gary A. Burlingame 2570 Asbestos ..............................................................................................................Joseph A. Krewer SUMMARY OF MAJOR CHANGES SINCE 2005 Quality Assurance/Quality Control (2020) was significantly revised to stay abreast of regulatory requirements and clarify the essential quality control practices for test methods in Part 2000. Flavor Profile Analysis (2170) contains new information on method safety and selecting and training the panel, as well as new procedures for preparing and handling glassware, addressing fatigue, and dechlorinating samples. The graphical and computer methods that can be used to calculate CaCO3 saturation indices were updated in Calcium Carbonate Saturation (2330). Salinity (2520) now allows the use of the International Temperature Scale of 1990 (ITS-90). The procedure for preparing the filter and its backing was clarified in Asbestos (2570). Also, many methods now refer users to the quality control practices that are considered to be an integral part of the method.