What document is prepared by the Lead Agency when substantial evidence suggests a project may significantly affect the environment?

The preparation of an Environmental Impact Report (EIR) is mandated when a project may have significant environmental impacts based on substantial evidence. An EIR serves as a comprehensive document that evaluates the potential effects of a proposed project on the environment and outlines ways to mitigate those impacts. It includes a detailed examination of the project’s potential consequences and alternative approaches.

This document is crucial because it allows for informed decision-making by public agencies and interested parties regarding the proposed project. The process involves thorough research, public input, and provides transparency about the project's environmental implications.

In contrast, a Negative Declaration is issued when a project is determined to have no significant environmental effects, thus not needing a full EIR. A Mitigated Negative Declaration addresses potential impacts that can be reduced to a less-than-significant level with specified mitigation measures, but it does not require a full EIR. A Notice of Determination is a formal statement from the agency indicating the decision made following the completion of an environmental review, often issued after an EIR or Negative Declaration has been filed.