A spokesman for Burlington Northern Santa Fe Railway Company says cleanup at the site of Saturday's train derailment in Lafayette should be finished by Friday. BNSF public affairs director Joseph Faust says five 40-yard dump trucks of soil have been removed from the site, which was contaminated with ten-thousand gallons of hydrochloric acid that spilled from one of the six cars that left the tracks beneath the Ambassador Caffery Parkway overpass. Faust says the aim is to return the site to the way it was before the derailment. Investigators are trying to determine the cause of the accident.