What is the test for judicial review of a decision made under the California Environmental Quality Act?

Section 21168 of the Public Resources Code provides for judicial review of an agency decision under CEQA which was made after a hearing by the administrative mandamus procedure of Code of Civil Procedure section 1094.5. Judicial review focuses on whether there is any substantial evidence in light of the whole record to support the decision and whether the agency abused its discretion by a filing to proceed in the manner required by law. (Citizens to Preserve the Ojai v. County of Ventura, 176 Cal.App.3d 421, 428, 222 Cal.Rptr. 247; Dehne v. County of Santa Clara, 115 Cal.App.3d 827, 835, 171 Cal.Rptr. 753.)