Consultant walks Santa Clara Planning Commission through CEQA basics, mitigation standards and thresholds

A consultant from David Powers & Associates gave the Santa Clara Planning Commission a primer on the California Environmental Quality Act (CEQA) during a study session on May 21, 2025, outlining how agencies set baselines, apply thresholds and craft enforceable mitigation.

The presentation, delivered by Shannon (David Powers & Associates), said CEQA requires state and local agencies to identify significant environmental impacts of discretionary actions and to avoid or mitigate those impacts when feasible. Shannon emphasized that the baseline — the existing condition against which a project is measured — is frozen at the start of the environmental review (for an initial study) or at circulation of a notice of preparation for an environmental impact report (EIR).

Shannon told commissioners mitigation must be measurable, enforceable and tied by a clear nexus to an identified impact. “It needs to be written really well,” Shannon said, adding that mitigation cannot simply be “another study” and that courts have tightly limited…