Cal. Public Resources Code § 41821.8

(a) Orders setting civil liability issued under this article shall become effective and final upon issuance thereof, and payment shall be made within 30 days of issuance. Copies of these orders shall be served by personal service or by certified mail upon the party served with the complaint and upon other persons who appeared at the hearing and requested a copy. (b) Within 30 days after service of a copy of a decision, any person so served may file with the superior court a petition for writ of mandate for review of the decision. Any person who fails to file the petition within the 30-day period may not challenge the reasonableness or validity of a decision or order of the hearing officer in any judicial proceedings brought to enforce the decision or order or for other remedies. (c) Except as otherwise provided in this section, Section 1094.5 of the Code of Civil Procedure governs any proceedings conducted pursuant to this subdivision. (d) This section does not prohibit the court from granting any appropriate relief within its jurisdiction. (e) All penalties collected under this article shall be deposited in the Integrated Waste Management Account created pursuant to Section 48001.