This Afternoon, Engine 63-1 had been on the street clearing an alarm bells call in the Foul Ct. Neighborhood, when Fire Chief 62 (Sherman) requested the unit to respond to Jefferson Drive and Horseshoe Road to assist at a Vehicle Accident Involving a Tractor Trailer. The tractor trailer has a ruptured saddle tank, in result of the accident. Therefore, a large amount of diesel fuel had been leaking onto the roadway. Engine 63-1 is equipped with products to stop leaks on saddle tanks, therefore assisted in that matter, while tending service to a motorist involved in the crash.