This policy assists the Regions in enforcing information request letters issued pursuant to section 104 of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) and section 3007 of the Resource Conservation and Recovery Act (RCRA). OSWER Directive No. 9834.4. Issued 9/10/1984.You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.