NEW ORLEANS - An oil and gas field worker who alleges that exposure to benzene in the petroleum distillates he handled contributed to the development of non-Hodgkin's lymphoma cannot show that company executives had the requisite control over working conditions to be subject to suit, a Louisiana federal judge said in an Oct. 25 opinion (Chris Cologne and Catherine Cologne v. Shell Oil Company, et al., No. 12-735, E.D. La.; 2013 U.S. Dist. LEXIS 153513).