At about 10:16 a.m. a fire occurred on 62BC11 & 62BC12. Clinker cooler failed to sufficiently cool the clinker--the source of ingition. BC11 is the 1st rubber belt in the system that feeds BC12, a tripper conveyor that runs the length of the clinker building. Kern County FD & LA County FD responded. Fire was extinguished by 11:27 a.m.