DTE Energy Services (DTEES) finished its construction project to convert a shuttered coal-fired power plant at the Port of Stockton to operate on biomass fuel. The plant, known as Stockton Biomass, began commercial operations on Feb. 21. It is selling its renewable power to PG&E. The plant will use about 320,000 tons of woody biomass fuel annually to generate about 45 MW of power. The fuel primarily is derived from urban wood waste, tree trimmings and agricultural processes.