Key dates in the Superfund program are included for the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), National Oil and Hazardous Substances Pollution Contingency Plan (NCP), Hazard Ranking System (HRS), National Priorities List (NPL), and Construction Completion List (CCL).

CERCLA - Comprehensive Environmental Response, Compensation, and Liability Act

• enacted December 11, 1980 — trust fund of $1.6 billion is authorized over 5 years
• amended by the Superfund Amendments and Reauthorization Act (SARA), enacted October 17, 1986 — trust fund of $8.5 billion is authorized over 5 years
• extended to September 30, 1994 — additional $5.1 billion is authorized
  
  

NCP - National Oil and Hazardous Substances Pollution Contingency Plan implements Superfund

• revised July 16, 1982 (47 FR 31180) to incorporate CERCLA requirements
• amended October 17, 1986 by SARA
• revised March 8, 1990 (55 FR 8666) in response to CERCLA Section 105
  
  

HRS - Hazard Ranking System

• promulgated July 16, 1982 (47 FR 31180) as Appendix A of the NCP
• revised December 14, 1990 (55 FR 51532) in response to CERCLA Section 105(c) added by SARA
• effective date March 14, 1991
  
  

NPL - National Priorities List

• promulgated September 8, 1983 (48 FR 40658) as Appendix B of the NCP
• last sites proposed under original HRS promulgated February 11, 1991 (56 FR 5598)
• first sites proposed under the revised HRS July 29, 1991 (56 FR 35840)
• first sites added to the NPL under the revised HRS October 14, 1992 (57 FR 47181)
  
  

CCL - Construction Completion List

• category activated February 11, 1991 (56 FR 5634)
• list activated March 2, 1993 (58 FR 12142)