Chapter 62-780, F.A.C., was adopted in 2005 and has not been substantially updated on a technical basis since then. In the intervening time, much has been learned with regard to applying Risk-Based Corrective Action (RBCA) principles to contaminated site management and closure. The rule chapter will be modernized to incorporate these “lessons learned” and to facilitate contaminated site closure. In addition, new techniques and approaches have been developed to support RBCA, but the rule chapter is silent, ambiguous or implicitly prohibits these advancements. Finally, a number of inconsistencies or incongruities have been uncovered within the rule chapter, and these will be corrected. Specific topics to be addressed include evaluation of Incremental Sampling Methodology, revision of determination of leachability, and the use and application of apportionment. This rule making is planned to run concurrently with rule making for Chapter 62-777, F.A.C. "Contaminated Site Cleanup Criteria". The agenda and draft rule will be available at http://www.dep.state.fl.us/waste/ by June 23rd or by contacting the contact person listed below.