California Code, Public Resources Code - PRC § 3251

(a) “Deserted facility” means a production facility determined by the supervisor to be deserted under Section 3237 and for which there is no operator responsible for its decommissioning under Section 3237.

(b) “Decommission” has the same meaning and requirements, as applicable, as the definition established in Section 1760 of Title 14 of the California Code of Regulations.

(c) “Hazardous facility” means a production facility determined by the supervisor to be a potential danger to life, health, or natural resources and for which there is no operator determined by the supervisor to be responsible for its decommissioning under Section 3237.

(d) “Hazardous well” means an oil and gas well determined by the supervisor to be a potential danger to life, health, or natural resources and for which there is no operator determined by the supervisor to be responsible for its plugging and abandonment under Section 3237.

(e) “Idle-deserted well” means an oil and gas well determined by the supervisor to be deserted under Section 3237 and for which there is no operator responsible for its plugging and abandonment under Section 3237.