Abstract: Disclosed is a spill pan which is ideally suited for installation between the rails of a rail siding used for loading and unloading liquid chemicals and solvents. The spill catch pan is designed to catch any inadvertent liquids which are discharged during the loading or unloading process. Such spill catch pan comprises a pair of substantially-planar, rigid segments which are pivotally hinged together at one side of each segment. The first segment also is pivotally mounted at the side opposite its said one side while the second segment is spring-biasedly mounted at the side opposite its said one side. The segments contain a hole penetrating therethrough which is located where the segments are pivotally hinged together. A pair of side walls are mounted adjacent said segments transverse to the hinges. The segments are mounted over a spill retainer at the first segment side opposite pivotal mount and at said second segment spring-biased mount such that said pair of segments are non-planar.