A Sonoma County judge has struck down the approval for a controversial rock quarry west of Cotati, saying key parts of the environmental impact report were inadequate. The final ruling, issued Thursday by Judge Elliot Daum, could derail the project by requiring the county and quarry developer John Barella to conduct a new environmental report, or overhaul large parts of the existing one. Opponents of the 70-acre Roblar Road quarry, including neighbors and environmentalists, welcomed the decision.