Cal. Pub. Util. Code § 224.2
"Landfill gas technology" means the process of extraction of gas or gaseous compounds from sanitary landfill areas which gas or compound was generated as a byproduct of the materials composing the landfill. For purposes of this division, real estate, fixtures, and personal property including gas extraction wells, engines and compressors for gas removal or storage, gas cleaning or rectifying equipment, equipment for the generation or production of steam, electricity, heat, or other form of energy through the use of landfill gas, and facilities for the transmission or distribution of landfill gas or other form of energy generated or produced therefrom shall not be considered an electrical, gas, or heat plant or pipeline.
Ca. Pub. Util. Code § 224.2