A bypass is set up in Bridgewater as the state Department of Energy and Environmental Protection continues to clean up a fuel leak at the Mobil gas station on Route 67.  The state contractors are drilling exploratory holes into the roadbed to determine the extent and depth of the gasoline that may have leaked off site.  Bridgewater officials say there is a possibility that Route 67 will need to be excavated to prevent any contamination from spreading.  Local police will are monitoring speeds on the bypass.