Welding Pipeline for Pall Gelman Sciences, Inc. Year 1999 Month February Day 11 Rights Held By Donated by the Ann Arbor News. © The Ann Arbor News. Copyright Copyright Protected Related Pipeline Nears Completion Photo Subjects Sewers & Sewage Pall Life Sciences Pall Gelman Dioxane Groundwater Contamination Cleanup History Pall Corp. Groundwater Contamination Gelman Sciences Inc. Dioxane Plume Ann Arbor News Old News Paul Cherry Christina N. Bowles Valley Drive