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Subsequent Environmental Document
A subsequent environmental document is required when:
- Substantial changes are proposed for a project that has undergone CEQA
compliance analysis and review in a previous environmental document.
- Changes constitute a new, potentially significant environmental impact(s)
- Changes substantially increase the severity of previously
identified/analyzed environmental impacts.
- Reference: T14 CCR §15162(a)(1)
- Substantial changes occur with respect to the circumstances under which
the project is to be undertaken that involve new potentially significant
impacts or may substantially increase the severity of previously identified
ones.
- Reference: T14 CCR §15162(a)(2)
- New information of substantial importance shows that:
- The project will have one or more significant impacts not discussed in the
previous environmental document.
- Potentially significant impacts previously examined will be substantially
more severe than shown in the previous environmental document.
- Mitigation measures or alternatives previously found not to be feasible
have become feasible and would substantially reduce one or more significant
impacts resulting from project implementation, but the project proponent(s)
declines to adopt them.
- Mitigation measures or alternatives that are considerably different from
those analyzed in the previous environmental document(s) would substantially
reduce one or more potentially significant impacts, but the project
proponent(s) declines to adopt them.
- Reference: T14 CCR §15162(a)(3)
Supplemental Environmental Document
A supplemental
EIR may be prepared and
circulated
when:
- Any of the conditions requiring the preparation of a subsequent EIR and
only minor additions or changes would be necessary to make the previous EIR
adequately apply to the project in the changed situation.
- The supplement to the EIR contains only the information necessary to
make the previous EIR adequate for the project as revised.
- Reference: T14 CCR §15163(a)
Addendum to an Environmental Document
An
addendum to an environmental document may be prepared
when:
- Changes or additions are necessary and a subsequent environmental document
is not required.
- An addendum may be prepared if only minor technical changes or additions
are necessary
- The addendum need not be circulated for review and comment, however, the
decision-making body shall consider the addendum with the environmental
document prior to making a decision on the project
- Reference: T14 CCR §15164
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