ECO Update is a bulletin series on ecological risk assessment of Superfund sites. These bulletins serve as supplements to Risk Assessment Guidance for Superfund, Volume II: Environmental Evaluation Manual (EPA/540-1-89/001). The information presented is intended to provide technical information to EPA and other government employees. It does not constitute rulemaking by the Agency, and may not be relied on to create a substantive or procedural right enforceable by any other person. The Government may take action that is at variance with these bulletins.

Disclaimer: These electronic files are courtesy copies of the ECO Update bulletin series and have been reformatted to make them available to you in electronic form. Formatting (margins, page numbering, etc.) may be different from the original hard copies to make the documents more easily readable on your computer screen. If any discrepancies with the original hard copies are found, the original hard copies are the official bulletins.

• The Role of BTAGS in Ecological Assessment (PDF)(4 pp, 110 K, 1991, 9345.0-05I )
  Volume 1, Number 1
• Ecological Assessment of Superfund Sites: An Overview (PDF)(8 pp, 206 K, 1991, 9345.0-05I)
  Volume 1, Number 2
• The Role of Natural Resource Trustees in the Superfund Process (PDF)(10 pp, 216 K, 1992, 9345.0-05I)
  Volume 1, Number 3
• Developing a Work Scope for Ecological Assessments (PDF)(13 pp, 128 K, 1992, 9345.0-05I)
  Volume 1, Number 4
• Briefing the BTAG: Initial Description of Setting, History, and Ecology of a Site (PDF)(11 pp, 256 K, 1992, 9345.0-05I)
  Volume 1, Number 5
• Using Toxicity Tests in Ecological Risk Assessment (PDF)(12 pp, 270 K, 1994, 9345.0-05I)
  Volume 2, Number 1
• Catalogue of Standard Toxicity Tests for Ecological Risk Assessment (PDF)(4 pp, 59 K, 1994, 9345.0-05I)
  Volume 2, Number 2
• Field Studies for Ecological Risk Assessment (PDF)(14 pp, 156 K, 1994, 9345.0-05I)
  Volume 2, Number 3
• Selecting and Using Reference Information in Superfund Ecological Risk Assessments (PDF)(6 pp, 2 MB, 1994, 9345.0-05I)
  Volume 2, Number 4
• Ecological Significance and Selection of Candidate Assessment Endpoints (PDF)(5 pp, 38 K, 1996, 9345.0-05I)
  Volume 3, Number 1
• Ecotox Thresholds (PDF)(12 pp, 196 K, 1996, 9345.0-05I)
  Volume 3, Number 2
• The Role of Screening-Level Risk Assessments and Refining Contaminants of Concern in Baseline Ecological Risk Assessments (PDF)(8 pp, 546 K, 2001, 9345.0-14 )
  Intermittent Bulletin
• ECO Update/ Ground Water Forum Issue Paper (PDF)(30 pp, 1 MB, 2008, 9285.6-17)
  EPA-540-R-06-072