Interim guidance assists the Regions in clarifying procurement procedures that claimants: (1) would be required to implement under the forthcoming Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA, commonly referred to as Superfund) response claims Procedures; and (2) may use in order to assure that the costs for which their claims are made against the Hazardous Substance Superfund (the Fund) will be reimbursed by EPA. OSWER Directive No. 9225.1-01. Issued 4/19/1989.