The state's top environmental official rejected calls yesterday for a time-consuming new study of a proposed wind farm in Nantucket Sound, ruling that a change in the layout of the 130 wind turbines did not raise new issues. The ruling, lauded by proponents and opponents of the Cape Wind project, ended what one supporter called ''the rock-pile sideshow" in the long-running fight about what would be the first offshore wind farm in the United States.
''The changes to the Cape Wind project . . . were minor and completely anticipated," said Seth Kaplan of the Boston-based Conservation Law Foundation, which strongly supports wind power.