Brooklyn Union Gas Co. has already spent $200-plus million as part of the project to clean up in and around the Gowanus Canal, the 1.8-mile Brooklyn waterway that doubles as a Superfund Site. The company is poised to spend hundreds of millions more. Thanks to a hard-fought trial victory by the company's lawyers at Covington & Burling, a team led by Ben Razi, Gretchen Hoff Varner and Mike Lechliter, the company's former insurer, Century Indemnity Company, is now set to chip in for part of that cleanup bill.