Cal. Health and Safety Code § 33459.8

If an agency undertakes any action to remedy or remove a release of hazardous substances on, under, or from property within a project area, the agency shall amend its redevelopment plan and follow the same procedure, as specified, and the legislative body is subject to the same restrictions as provided for in Article 4 (commencing with Section 33330), for the adoption of a redevelopment plan, if the agency determines that as a result of the remedial or removal action, it will also be taking any of the following actions: (a) Proposing to add new territory to the project area. (b) Increasing either the limitation on the amount of funds to be allocated to the agency or the time limit on the establishing of loans, advances, and indebtedness established pursuant to subdivisions (1) and (2) of Section 33333.2. (c) Lengthening the period during which the redevelopment plan is effective. (d) Merging project areas. (e) Adding significant additional capital improvement projects.