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The Daiken NZ MDF Plant located in Ashley has 45 decibel contour that coincides with the heavy industrial zoning and the opposite property across Upper Sefton Road. The Rangiora Airfield has a 65 decibel noise contour that prohibits residential and noise sensitive activities and a 55 decibel that requires sound insulation for residential activities. The Woodford Glen Speedway has a speedway noise contour limiting residential activities inside the contour. 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