Box 124 was dispatched for a non-injury accident in Spring Township On I99 just prior to I80 Eastbound off-ramp Fire Police were needed from Dept 56 to control traffic. Centre 911 reported one tractor trailer on its side, Chief 203 arrived on-scene confirming one tractor with two pony trailers, the 2nd one onto its side. Upon investigating the contents of the trailer he advised of multiple drums of flammable liquid with a slight leak from the over turned trailer. He then advised to add two Engines onto the box. E210 responded along with Logan E111 both units arrived on the scene and took up a defensive position with the trailer. Units assisted Eagle Towing and Recovery with unloading the trailer while Fire Police controlled traffic. Once the trailer was hoisted up-right units cleared the scene. Cause of the Crash was Icy Roads