For purposes of this chapter, the following definitions apply:
(a) “Department” means the Department of Toxic Substances Control.
(b) “Gas corporation” has the same meaning as defined in Section 222 of the Public Utilities Code and is subject to rate regulation by the Public Utilities Commission.
(c) “Person” means an individual, trust, firm, joint stock company, partnership, association, business concern, limited liability company, or corporation. “Person” also includes any city, county, district, and the state or any department or agency thereof, or the federal government or any department or agency thereof to the extent permitted by law.