This morning at 04:48 crews were alerted for the Vehicle Accident on Route 22, Derry Twp (71 District). EMS arrived to find a tri-axle truck overturned in a field. The truck hit into a farm tractor carrying 2 ammonia tanks that was sitting in the field. Both tanks were compromised, with 1 having a small leak. The truck was leaking diesel fuel & hydraulic fluid. Engine 34 arrived 2nd due and assisted with securing the vehicles, assessing the haz-mat situation and assisting Team 800 (County Haz-Mat Team) with containment & cleanup. Engine 34 operated for 3 hrs.