Where plaintiffs needed only to show a potential of future harm from exposure to PCBs after their property was contaminated by a nearby improper demolition to survive summary judgment, the lower court order was reversed.The 7th U.S. Circuit Court of Appeals reversed a decision by Chief U.S. District Judge James D. Peterson, Western District of Wisconsin.William and Nancy Liebhart own three houses on the same block in Watertown, Wis. The block was previously occupied by an abandoned electrical transformer factory, last …