ASTM Committee E50 on Environmental Assessment, Risk Management and Corrective Action was formed in 1990. E50 meets twice a year, usually in April and October, with about 70 members attending over three days of technical meetings. The Committee, with a current membership of approximately 1,000, has 6 technical subcommittees that have jurisdiction of over 93 standards, published in the Annual Book of ASTM Standards, Volumes 11.05 and 11.06. Information on their subcommittee structure, and portfolio of approved standards and Work Items under development, are available from the List of Subcommittees, Standards and Work Items below. These standards have and continue to play a preeminent role in all aspects commercial real estate transactions, corrective action, pollution prevention, and beneficial use, and biological effects and environmental fate.