FORTY MOST ASKED QUESTIONS & ANSWERS
19a. What is the scope of mitigation measures that must be discussed?
The mitigation measures discussed in an EIS must cover the range of impacts of the proposal. The measures must include such
things as design alternatives that would decrease pollution emissions, construction impacts, esthetic vision, as well as relocation
assistance, possible land use controls that could be enacted, and other possible efforts. Mitigation measures must be considered even
for impacts that by themselves would not be considered "significant." Once the proposal itself is considered as a whole to have
significant effects, all of its specific effects on the environment (whether or not "significant") must be considered, and mitigation
measures must be developed where it is feasible to do so. Sections 1502.14(f), 1500.16(h), 1508.14.
19b. How should an EIS treat the subject of available mitigation measures that are (1) outside the jurisdiction of the lead
or cooperating agencies, or (2) unlikely to be adopted or enforced by the responsible agency?
All relevant, reasonable mitigation measures that could improve the project are to be identified, even if they are outside the
jurisdiction of the lead agency or the cooperating agencies, and thus would not be committed as part of the RODs of these agencies.
Sections 1502.16(h), 1505.2(c). This will serve to alert agencies or officials who can implement these extra measures, and will
encourage them to do so. Because the EIS is the most comprehensive environmental document, it is an ideal vehicle in which to lay out
not only the full range of environmental impacts but also the full spectrum of appropriate mitigation. However, to ensure that
environmental effects of a proposed action are fairly assessed, the probability of the mitigation measures being implemented must also
be discussed. Thus the EIS and Record of Decision should indicate the likelihood that such measures will be adopted or enforced by the
Sections 1502.16(h), 1505.2. If there is a history of nonenforcement or opposition to such measures, the EIS and Record of Decision
should acknowledge such opposition or nonenforcement. If the necessary mitigation measures will not be ready for a long period of time,
this fact, of course, should also be recognized.