The biomass facility sells its electrical output to Southern California Edison under a long-term agreement.
The plant is fueled primarily using clean diverted wood waste, green waste and agricultural residues, and the transaction is expected to close after receipt of required regulatory approvals.
American Consumer Industries, the majority shareholder of Colmac, has operated the power plant since its construction and initial start-up in 1992.
Greenleaf Power acquires, develops, owns and operates power projects that utilize residual biomass as fuel, having approximately 60MW of biomass generating assets in California.