California Code, Government Code - GOV § 12611

(a) Whenever proceedings before an administrative agency are pending or available to determine the legality of the defendants' conduct, program, or product, the court shall stay the action brought pursuant to Section 12607 pending the completion of such proceedings unless such stay will result in irreparable pollution, impairment or destruction to any natural resource.

(b) In the order staying the proceedings under subdivision (a), the court may grant temporary equitable relief where appropriate to prevent irreparable pollution, impairment or destruction of any natural resource.