Since Chapter 62-777 was adopted in 2005 there have been many changes with regard to how to calculate appropriate risk-based cleanup target levels both in terms of the methods of calculation and the parameters used in the calculations. These developments lead to improved derivation of the appropriate cleanup target levels and provide the correct degree of protection to human health and the environment. These new methods also reduce the amount of conservatism in some previous estimates to suitable levels thereby providing sufficient protectiveness while minimizing potential cleanup costs. The department is proposing to review and update the method(s) for establishing cleanup target levels, the parameter values used, and develop updated cleanup target levels. Note that tables 1-6 and figures 1-10 in 62-777, F.A.C. will also be updated. This update to the method(s) and values is planned to run concurrently with the rule making for Chapter 62-780, F.A.C. 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.