NEW ORLEANS - A Louisiana federal judge refused to dismiss a tankerman's claims that benzene exposure aboard ships caused acute myelogenous leukemia (AML), saying Oct. 4 that issues of material fact exist as to whether Valero Refining Texas LP's products were defective (Edward F. Authenment III v. Ingram Barge Company, et al., No. 10-2107, E.D. La.; 2013 U.S. Dist. LEXIS 144240).