ABEC No. 4, operating under the name CE&S Dairy, is a biomass power generation facility located in Bakersfield, California. The plant utilizes internal combustion technology and has an operating capacity of 1 megawatt (MW). It is situated within the jurisdiction of the California Independent System Operator and falls under the Western Electricity Coordinating Council (NERC Region). The facility is managed by California Bioenergy, which also serves as the majority owner and holding company. Notably, CE&S Dairy operates in an unregulated environment, allowing for flexible operational strategies in the biomass energy sector.