California Code, Public Resources Code - PRC § 2778

(a) Reclamation plans, reports, applications, and other documents submitted pursuant to this chapter are public records, unless it can be demonstrated to the satisfaction of the lead agency that the release of that information, or part thereof, would reveal production, reserves, or rate of depletion entitled to protection as proprietary information. The lead agency shall identify such proprietary information as a separate part of the application. Proprietary information shall be made available only to the supervisor and to persons authorized in writing by the operator and by the owner.

(b) A copy of all reclamation plans, reports, applications, and other documents submitted pursuant to this chapter shall be furnished to the supervisor by lead agencies on request.