A multidisciplinary team of scientists (Appendix 1) examined 10 of the 16 environmental benchmarks that are tracked by the Oregon Progress Board. The intent of the environmental benchmarks is to provide a fair assessment of the status and trends of Oregon's environmental health. The scientists were asked to clarify benchmark definitions if necessary, explain the status of data for the benchmarks, and define ecologically possible conditions for each of those benchmarks for which such conditions could be identified.