(October 26, 2016, 2:39 PM EDT) -- OKLAHOMA CITY — The operator of a zinc smelter on Sept. 22 filed a brief in Oklahoma federal court seeking approval to engage in proposed communications with 18 nonrepresented putative class members regarding the eligibility of their properties for soil remediation related to a groundwater contamination lawsuit (Helen Briggs, et al. v. Freeport McMoran Copper & Gold Inc., No. 13-1157, W.D. Okla.)....