... (19 80, 2000a),Extoxnet (20 01) , Spectrum Labs (20 01) , SKC (20 01) , Cambridge Software (20 01) , NCDWQ(20 01) , Scorecard.org (Environmental Defense, 20 01) , Manahan (2000, 20 01) , Patnaik (19 97), and Weiner ... the environmental impacts and possible alternatives of any federal actions that significantly affect the environment (Mackenthun, 19 98, p. 15 ; Yost, 19 97, p. 1- 1 1) . This usually starts with an environmental ... broken into phases. The data management requirements of EAs and EISs vary considerably, depending on the nature of the project and the amount and type of data available.Phase 1 Environmental Assessment...