A truck driver and his supervisor were arrested for allegedly swapping out good-quality coal, and delivering sub-standard product to Eskom’s Matla power station on Monday. “The arrests took place after the truck driver was found to be in possession of sub-grade coal destined for the facility. The coal swapping allegedly took place at a known illegal coal yard in the Mpumalanga area, prior to the delivery being made at the Matla power station,” Eskom said on Wednesday.