ST. LOUIS - Union Pacific Railroad Co. can have a second deposition of an Asarco LLC corporate representative but only regarding the company's evaluation and assessment of Union Pacific's potential liability on contamination at a site in Missouri, a federal judge ruled April 22 (Asarco LLC v. NL Industries Inc., et al., No. 11-CV-00864-JAR, E.D. Mo.; 2014 U.S. Dist. LEXIS 55524).