No project, as defined by the California Environmental Quality Act (CEQA) and CEQA Guidelines, shall be approved if the proposed project may have a significant effect on the environment until an environmental impact report has been made. No such approval shall be given until a finding supported by substantial evidence has been made as to each significant effect identified in such report, as follows:
(a)
Changes or alterations have been required in such project which mitigate or avoid such effect; or
(b)
Such changes or alterations are within the jurisdiction and responsibility of another public agency which has or can and should adopt such changes; or
(c)
Specified economic, social or other considerations make infeasible any mitigation or alternative methods.
(Ord. 1803 N.S. § 1, 1991)