BILLINGS, Mont. (AP) — Montana lawmakers urged the Environmental Protection Agency on Thursday to push forward with a proposed asbestos safety standard that will guide the cleanup of a mountain town where hundreds have died from exposure to the dangerous material.

U.S. Sens. Max Baucus and Jon Tester said residents of Libby have grown frustrated waiting for a pending risk study to be completed. And the two Democrats accused chemical giant W.R. Grace Inc. of trying to cloud the science on the issue.