A Review of Toxicity Characteristic Leaching Procedure Testing of Railroad Crossties, R-861 Hockensmith, E., M. Schlauch and C.P.L. Barkan. 1994. A Review of Toxicity Characteristic Leaching Procedure Testing of Railroad Crossties, R-861. Association of American Railroads, Washington Systems Center, Washington, DC. Files We're sorry. At this time, we do not have a full text copy of this text available. Categories Infrastructure